• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a method for fine location of a cable fault of a buried cable (1) for transmitting electrical energy at a first and a different second current position of the fine positioning device (5) of the mobile fine positioning device (5) each by means of a GPS receiver (17) the fine positioning device (5) has a first and a second position measurement value (a, a) for the respective current position of the fine positioning device (5) and a first and a second distance measurement value (s, s) for the respective distance of the precise error location (p) determined from the respective current position of the mobile fine positioning device (5) and from this at least one possible fault location (o1, o) is determined. On a display (14) of the fine location device (5), the environment of the approximate position (u) of the cable fault or in an image recorded by a camera (23) of the mobile fine location device (5) is at least stored in a map stored in the fine location device (5) a destination (z) is displayed which corresponds to at least one of the possible error locations (o1, o2).
    公开号:AT521058A1
    申请号:T80/2018
    申请日:2018-03-26
    公开日:2019-10-15
    发明作者:
    申请人:Baur Gmbh；
    IPC主号:
    专利说明:

    The invention relates to methods for fine localization of a cable fault of a buried cable for transmitting electrical energy, wherein for determining a precise fault location of the cable fault on the basis of a previously determined by a pre-location approximate position of the cable fault by means of a mobile Feinortungseinrichtung respective distances of the defective point of the Cable are determined by respective current positions of the mobile Feinortungseinrichtung.
    In buried cables for the transmission of electrical energy errors may occur, which require a repair of the cable in the area of the defect. These may be low, medium or high voltage cables. To perform the repair, it is first necessary to locate the cable fault. Locate the location (= fault location) vertically above the cable fault at which the excavation is performed in order to find the location of the cable where the cable fault is located. Methods are known.
    In known methods for locating cable faults, a preliminary location (coarse location) is initially carried out. An example of this is the secondary multiple pulse method, which is a high voltage measurement technique suitable for high impedance cable faults. To locate a cable fault, a first reflection of a voltage pulse at the cable end and a second reflection are detected by a breakdown at the defective location. In addition, other methods of pre-location are known, e.g. Decay and ICM.
    As a result of such pre-location, one obtains the cable length between the location of the feed of the pre-location signal and the defective location of the cable. With / 27 • · known cable route (= course of the cable in the ground) the position of the cable fault can be determined. For the cable route either geo-data are available or a determination of the laying distance of the buried cable is required. Such provisions of the laying route (= the course of the cable) are carried out, for example, by feeding a sound frequency in the underground cable and an above-ground along the cable route guided search coil.
    However, the known methods of pre-location provide only an approximate location of the cable fault. One reason in particular is that when laying a cable along the cable route to more or less large deviations from the shortest course. Thus, the laying depth can vary, there may be cable loops, etc. Overall, there is an inaccuracy of the pre-location of the cable fault, which is usually in the range of 1% to 10% of the length of the cable between the point of feeding the measuring signal and the cable fault. Depending on the length of this route, the deviation between the precise fault location of the cable fault and the approximate position of the cable fault determined by the pre-location can thus be in the range of a few meters to a few hundred meters.
    It is also already known to display the determined approximate position of the cable fault on a map. The pre-location is carried out by means of a sub-locating device usually located in a measuring carriage, which is located in the area of a cable station, from which a number of cables run out. Their courses are known as so-called "GIS data and can be stored in the pre-location device. After the user has entered the beginning of the cable on which the pre-location takes place, after determining the distance of the cable fault, an approximate position of the cable fault can be displayed in a map displayed on the display unit of the pre-location device. The
    Pre-locating device may also have a GPS receiver, so that the position of the measuring carriage can be displayed in the map. Thereupon, the person performing the fault location can proceed to the approximate position of the cable fault by means of satellite navigation.
    / 27
    In order to then determine the precise fault location of the cable fault on the basis of the previously performed pre-location (coarse location) so that the digging work can be carried out at this location in the further course, an acoustic fine-location method is known. In this case, impulse voltage pulses are fed into the cable by means of a surge voltage generator. These high-energy pulses cause a voltage pulse propagating in the cable, which leads to a breakdown at the defective point. In this case, a detectable in the vicinity of the cable fault with a ground microphone acoustic signal is generated. It can now be searched with the ground microphone the location of the highest amplitude of the breakdown noise to determine the fault location of the cable fault. With each measurement, the ground microphone is placed on the ground and waited for the next surge pulse and the acoustic signal triggered thereby. However, troubleshooting in this way is very time consuming.
    An improvement of this method is that a distance of the defective location of the cable is determined by the current position of a mobile Feinortungseinrichtung. For this purpose, in addition to the ground microphone, which serves to detect the acoustic signal, the mobile fine positioning device has an electromagnetic sensor with which the impulse voltage pulse transmitted via the cable and the electromagnetic field occurring thereby are detected. Between this detected electromagnetic signal and the detected acoustic signal is a time difference, which is detected. This time difference corresponds to the time required for breakdown-induced sound from the defective location to the mobile fine-location device (the time of propagation of the surge voltage pulse being negligible). Thus, from this determined time difference, a distance of the defective location from the current position of the mobile fine location device can be determined. This distance is displayed on a display of the mobile fine-tuning device. The person locating the cable fault can thus determine in their repetitive measurements whether the distance to the defective point / 27
    reduced. If this distance is a minimum, the person is directly above the defective point of the cable, so at the precise error location. Finding the precise error location is greatly simplified.
    An acoustic fine-localization method, in which the time difference between the acoustic signal and the surge voltage pulse is evaluated in order to determine the distance to the cable fault, is apparent, for example, from EP 2 405 279 A2. This document is a method in which an acoustic fine positioning can be performed even in very noisy environmental conditions.
    In addition to facilities for fault location, which are used after a cable fault has occurred, a so-called "online monitoring for permanent monitoring of cables in operation is also known. For this purpose, fixed, stationary monitoring devices are used.
    From CN 105676074 A is known a device for online monitoring of laid in the form of overhead lines power lines. Measuring units are mounted on high-voltage pylons at a distance of 5km to 50km, of which traveling waves occurring in the event of a rollover are detected. By means of GPS there is a time synchronization and at a base station the time difference between the arrival of the traveling waves is evaluated in order to approximately determine the position of the defective location.
    The object of the invention is to further simplify the finding of the precise position of the cable fault in a method for fine positioning of the type mentioned. According to the invention, this is achieved by a method having the features of claim 1.
    In the method of the invention is by means of a GPS receiver of the
    Fine locating detects the current position of the fine positioning device, whereby a "position measurement value is obtained. Such a position measured value is at a first and a different second current position of the / 27
    Fine positioning detected. The distance of the precise fault location from the respective current position of the mobile fine positioning device is detected in each case at the first and at the second current position of the fine positioning device, whereby a "distance measured value is obtained in each case. By means of the first and second position measurement values and the first and second distance measurement values, at least one previously unknown possible error location is determined. This determination is made by the fact that, for a possible fault location, its distance from the first position measurement value must correspond to the first distance measurement value and its distance from the second position measurement value must correspond to the second distance measurement value. In general, the measurements at two different current positions of the fine-location device will result in two possible error locations, one of which corresponds to the actual precise location of the error. If, however, the two current positions of the mobile fine positioning device, at which the position measurement values and distance measurement values have been determined, lie on a straight line on which the precise error location also lies (based on a plan view), then only one possible error location is obtained as a result then already corresponds to the precise error location.
    On a display of Feinortungseinrichtung is in the
    Fine locating device stored map of the environment of the approximate position of the cable fault or recorded by a camera of the fine positioning device image. In this map or in this image at least one destination is displayed, which corresponds to at least one of the thus determined possible fault locations. The at least one illustrated destination thus indicates to the user where the actual fault location may lie.
    If from the at the first and second current position the
    When the fine positioning device is used to determine the position measurement values and distance measurement values result in two possible error locations, advantageously at a different first and second third current position of the fine positioning device, which is not on a common straight line with the first and second current position of the fine positioning device (based on / 27
    a floor plan representation), from the mobile fine location device a third position measured value and a third distance measured value for the distance of the precise fault location from the third current position of the mobile fine positioning device are determined. On the basis of the third position measured value and the third distance measured value, it can be determined which of the two previously determined possible error locations corresponds to the precise error location by determining at which of the two possible error locations the distance from the third current position of the fine positioning device corresponds to the third distance measured value. On the display of Feinortungseinrichtung then the precise error location corresponding possible fault location can be displayed as a destination, in the map shown on the display or displayed on the display, taken by the camera image.
    The method according to the invention thus directly displays to the user at least one destination, preferably exactly one destination, for the possible precise error location of the cable fault in the map or in the image, so that the latter can move without further ado to this destination. Finding the precise fault location of the cable fault to perform excavation work there to uncover and repair the cable can thereby be simplified and accelerated.
    The determination of the at least one possible fault location, which is then displayed as a destination on the display of the fine positioning device, can thus advantageously take place without reference to the profile of the cable related to the plan view. The cable course itself therefore does not necessarily have to be known or stored in the fine positioning device. If the course of the cable is known and stored in the fine positioning device, for example by transmission from a GIS database, then this cable path can additionally be displayed in the map stored in the fine positioning device or in the image taken by the camera of the fine positioning device, which is useful for finding the precise location of the cable fault can be helpful. Thus, if after the measurements at the first and second position of the fine-tuning device, the user can still / 27 •······························································ ································································································································································································································ must lie. If after the measurements at the first and second current position of the
    Fine locating device or the measurements at the first, second and third current position of the fine positioning device only one destination is displayed on the display, so this destination can be checked for consistency with the stored cable history.
    Further advantages and details of the invention are explained below with reference to the accompanying drawings. In this show:
    Fig. 1 is a schematic representation of the fine location;
    FIG. 2 is a schematic diagram of the fine positioning device; FIG.
    FIG. 3 shows an illustration to illustrate a first step for determining possible fault locations of the cable fault; FIG.
    FIG. 4 shows a representation corresponding to FIG. 3 of a second step for determining the precise error location; FIG.
    5 is an illustration of the display of the fine positioning device;
    FIG. 6 shows a representation corresponding to FIG. 3 in another measuring situation; FIG.
    Fig. 7 is a schematic diagram corresponding to Figure 2 for a modified embodiment of the invention.
    Fig. 8 is an illustration of the display of the fine positioning device according to this modified embodiment of the invention;
    Fig. 9 is a representation corresponding to Fig. 3 for illustrating a possible calculation method.
    An inventive method for fine positioning is described below with reference to the figures. Fig. 1 shows a schematic representation of a buried cable 1 for the transmission of electrical energy. It may be a low voltage cable (up to 1 kV), a medium voltage cable (1 kV to 60 kV) or a high voltage cable (> 60 kV, for example 110 kV, 220 kV or 380 kV). At a faulty point f, the cable has a cable fault, in particular a / 27 high-impedance cable fault or an intermittent cable fault. By a known pre-location (coarse location) an approximate position u of the cable fault was determined.
    For fine localization (= Nachortung) of the cable fault 2 impulse voltage pulses 3 are fed into the cable 1 by means of a connected to the cable surge voltage generator. For example, every three seconds, the supply of a surge voltage pulse. The distances between the individual surge voltage pulses may also have different values, but are preferably in the range between 1 s and 10 s.
    The magnitude of the surge voltage pulses may also depend on the type of cable being tested. In general, the magnitude of the surge voltage pulses will be above 1 kV, for example low voltage cables in the range of 2 to 5 kV.
    For medium and high voltage cables, the magnitude of the voltage pulses will generally be above 5 kV, for example in the range of 10 to 40 kV. Conveniently, the height of the voltage pulses can be adjusted at the surge voltage generator. Advantageously, the surge voltage generator covers at least an adjustable range of 2 kV to 30 kV, wherein the covered area can also be larger.
    A person locating the cable fault 4 carries a mobile Feinortungseinrichtung 5 with it. In the exemplary embodiment shown, this comprises two separate devices, namely a detection unit 6 and a display unit 7. The data transmission between the detection unit 6 and the display unit 7 takes place wirelessly in the exemplary embodiment, e.g. via Bluetooth, but could also be wired.
    The detection unit 6 comprises a microphone 8 (which could also be referred to as a "floor microphone") and an electromagnetic sensor 9. Signals emitted by the microphone 8 and the electromagnetic sensor 9 are detected by an analog circuit, A / D converted and / 27
    Microprocessor unit supplied. The analog circuit, the A / D converter and the microprocessor unit are shown schematically in FIG. 2 as an electronic signal processing unit 10. Furthermore, the data is transmitted by means of a transmitter 11 to a receiver 12 of the display unit 7. The received data are evaluated in a microprocessor unit 13 and the microprocessor unit 13 is a display 14 is driven. In the microprocessor unit 13, a microprocessor 15 and a memory 16 are schematically indicated. The microprocessor unit 13 will generally comprise further components, which are not shown in FIG.
    The detection unit 6 could also be referred to collectively as "ground microphone.
    Furthermore, the display unit 7 has a GPS receiver 17 connected to the microprocessor unit 13 for receiving GPS signals.
    If data should also be transmitted to the detection unit 6 by the display unit 7, which will generally be expedient, the transmitter 11 and the receiver 12 are each designed as a transceiver unit. In the case of wired data transmission, the transmitter 11 and the receiver 12 could also be omitted. It could then be provided only in a microprocessor unit either in the display unit 7 or in the detection unit 6, which has at least one microprocessor 15 and a memory 16.
    The display unit may be a smartphone or a tablet. It can be used a commercially available smartphone or tablet, which is set up accordingly. However, the display unit can also be designed specifically for this application.
    In a modified embodiment, the detection unit 6 and the display unit 7 could also be connected to a common device.
    / 27 ·············· ····
    Signals received by the microphone may be output to a headphone and / or speaker so that the user receives acoustic feedback.
    To perform the fine location of the cable fault, be with the
    Surge generator 2 repetitive surge voltage pulses 3 fed into the cable 1. The surge voltage pulses 3 each lead to a breakdown at the defective point f of the cable 1, whereby an acoustic signal in the form of an acoustic pulse 18 is generated. This acoustic pulse 18 propagates in all directions in the soil 19 surrounding the cable 1.
    When a surge voltage pulse 3 fed into the cable 1 passes the area below the mobile fine-location device 5, the electromagnetic signal caused thereby is detected by the electromagnetic sensor 9 as an electromagnetic pulse. This detected electromagnetic pulse is used by the microprocessor unit 13 as the first trigger, which triggers a time measurement. When the acoustic pulse 18 caused by the breakdown triggered by the surge pulse is received by the microphone 8 and a corresponding signal is output to the microprocessor unit 13, this is detected by the microphone
    Microprocessor unit 13 used as a second trigger signal, which ends the time measurement. From the elapsed time Et between the first and the second trigger signal, the distance s / of the grounded defective point f of the cable 1 from the current position of the fine positioning device 5 is determined. In this case, the propagation time of the surge voltage pulse between the region of the current position of the mobile fine location device 5 and the defective point f or the propagation time of the electromagnetic pulse caused by the surge voltage pulse and detected by the electromagnetic sensor 9 can be neglected, since the propagation velocity v A of the acoustic pulse , So the speed of sound in the ground 19, is much lower. The distance s, 'is thus determined by:
    / 27 s / = V A · Δΐ
    This determination of the distance s / the actual defective location f of the cable 1 from the current position of the mobile fine-location device 5 is known and is also referred to as the "coincidence method.
    With the fine location device 5, the precise fault location p of the cable fault is determined. It is the location on the floor 20 vertically above the actual defective location f of the cable. In a plan view, the precise fault location p and the actual defective location f of the cable thus coincide.
    At this precise fault location p, the excavation work for exposing the defective point f of the cable 1 is to be carried out in the further course.
    The determination of the precise fault location p will be described below with reference to FIGS. 3 and 4, which are plan views.
    It is initially at a first current position of the mobile
    Fine location device 5 by means of the GPS receiver 17 of the mobile
    Fine locating device 5 a position reading a, detected for this current position. In addition, a distance measurement value s, for the distance of the precise fault location p from the current position of the fine positioning device 5, is determined at this current position of the mobile fine positioning device 5. As an approximation, the distance s / of the actual defective location f of the cable 1 from the current position a, the mobile fine positioning device 5, which is determined as described above, can be used for this purpose. This approximation can be sufficient in particular for larger distances of the defective point f of the cable 1 from the current position. In particular, if the distance measured value falls short of a minimum value, a depth value t (see Fig. 1) for the laying depth of the cable 1 can be taken into account. For this depth value t, for example, a common cable laying depth can be stored and used, e.g. 0.5 m.
    / 27
    • fl ight fl · fl · fl · fl · fl · fl ·
    A manual input is also possible. Taking into account the depth value t, a distance measured s, more or less smaller than the determined distance s, is determined.
    The minimum value for s, ', below which a corrected distance measurement value s, is determined and used can be, for example, 1.5 m. A corrected distance measurement s, could also be determined and used for larger values for s /.
    As a result, at a second current position the mobile
    Fine positioning device, which differs from the first current position, in turn, a position measurement value p 2 and distance measurement a 2 determined.
    From these two position measured values and distance measured values, at least one possible fault location o "o 2 can be determined. The possible fault locations o "o 2 lie both on a circle with the radius s, around the center a, as well as on a circle with the radius s 2 around the center a 2 . 3 shows a situation in which the first and second current positions of the fine positioning device, at which the position measurement values a "a 2 and distance measurement values s" s 2 are determined, do not lie on a common straight line. The circle with the radius s, and the center a, and the circle with the radius s 2 and the center a 2 then intersect at two points, which identify the possible fault locations o ,, o 2 . At one of these two locations of the possible fault locations o v o 2 lies the actual precise fault location p.
    In Fig. 3 is further indicated by a dashed line the course of the cable 1 (which may not be known). In addition, the approximate position u of the cable fault determined in the pre-location procedure is shown.
    As a result, as shown in FIG. 4, at a third current position of the fine positioning device, which differs from the first and second positions and does not lie with them on a common straight line, in turn / 27 •····· ···································································································. ·· the position measurement a 3 and the distance measurement s 3 determined. The one of the possible fault locations o ,, o 2 , which lies on the circle with radius s 3 around the center a 3 , can thus be identified as the precise fault location p. Because of possible measurement errors, a permissible deviation can be provided, within which a possible fault o ,, o 2 is still as on the circle of radius s 3 and a center 3 is considered to lie.
    4, the course of the cable 1 is again indicated by a dashed line and the approximate position of the cable fault is shown.
    This possible fault location o 1 ( corresponding to the precise fault location p) is displayed on the display 14 of the mobile fine-tuning device 5 as the destination z, on a map which has previously been stored on the fine-location device 5.
    The map is again a plan view, where the map can also be a satellite image. Also a three-dimensional representation is possible.
    In any case, the card previously stored on the fine-location device thus comprises an environment of the approximate position u of the cable fault determined in the pre-location procedure (the card preferably containing at least a range of 500 m around the approximate position u of the cable fault determined in the pre-location). The card can be stored from the outset in the fine positioning device 5 or downloaded for the particular application from the Internet. As can be seen from FIG. 5, road courses 21 are shown in the map.
    The user can thus go directly to the illustrated destination z. There may be further measurements made there, e.g. Level measurements of the volume to verify the precise error location p.
    The current position of the mobile fine location device 5, according to the / 27 * * «* • • • w • • • • • • • • • • · · · · · · · · • • · ···· · · · · · · ·
    Position measurement a 3 is preferably also shown in the map. The approximate position u of the cable fault determined by the preliminary location can also be shown.
    In addition, in the map, the geographic course of the cable 1 (= the laying route of the cable 1), so the plan view of the cable run, be shown, if this is known and stored in the fine positioning device. For this purpose, existing geo-data for the cable run may have previously been stored in the memory 16, for example by transmission from a GIS database. Also, the cable history may have been entered by the user. In Fig. 5 the cable course is indicated by dashed lines.
    By displaying the cable course, the correct position of the destination z, ie the correct position of the precise error location p, can additionally be verified. This also facilitates the determination of the positions at which the measurements are carried out (ie the determination of the position measurement values a 1f a 2 , a 3 ).
    After the measurements at the positions of the fine positioning device in accordance with the position measurement values a "a 2 , a content analogous to FIG. 5 can be displayed on the display 14 of the mobile fine positioning device 5. There are then just two destinations z corresponding to the possible error locations o "o 2 shown. Conveniently, the current position is shown according to the position measurement a 2. The user can thus obtain an orientation already before the third measurement, where the possible fault locations o "o 2 are located. If the course of the cable is also shown in the display, the user can decide already after the second measurement which of the two illustrated destinations z corresponds to the precise error location p.
    FIG. 6 shows the situation which results from measurements carried out at the positions corresponding to the position measurement values a 1 , a 2 , when these position measurement values a 1 , a 2 , in particular coincidentally, lie on a straight line g, which is also indicated by the precise Error location p leads. The circle around the center a, with / 27 • · ·
    • · · · · · · · · ······ ·······························
    Radius s, and the circle around the center a 2 with radius s 2 have only one point in common, so that there is only one possible error location o, which corresponds to the precise error location p. A display according to FIG. 5 can then take place immediately after the second measurement has been carried out (the position of the fine positioning device corresponding to the position measurement value a2).
    The method according to the invention thus makes possible a very time-saving and reliable fine positioning for the user.
    A modified embodiment of the invention will be explained below with reference to FIGS. 7 and 8. Apart from the differences described below, the modified embodiment corresponds to the previously described embodiment and the description thereof is correspondingly applicable, together with the described possible modifications.
    The difference from the embodiment described above is that to display the at least one destination z on the display 14 of the mobile fine location device 5, the user with a camera 23 of the mobile fine location device 5 takes a picture (photo) of the environment of the approximate position u of the cable fault and the at least one destination z is shown in this picture, cf. FIG. 8. The at least one destination z for the actual error location is thus superimposed in the real image taken by the camera of the fine positioning device. Should the destination z (or at least one of the destinations z) be outside the image taken by the camera, this will be signaled to the user accordingly.
    This modified embodiment of the invention may also be combined with the previously described embodiment of the invention, wherein it is selectable for the user whether the display or the image taken by the camera is displayed.
    Various further modifications of the invention are conceivable and possible.
    / 27 • · • · ·
    For example, the evaluations previously described by the microprocessor unit 13 could also be performed entirely or partially in the microprocessor unit of the detection unit 6.
    The GPS receiver 17 could also be arranged in the detection unit 6.
    The electromagnetic sensor 9 could also be arranged in the display unit 7. The detection unit 6 could then have only the microphone 8.
    As already mentioned, the display unit 7 could also be a smartphone or tablet. The display unit 7 could also have two or more separate devices. Thus, the display unit 7 could include a first device with an indication of the distance to the defective location of the cable and / or the volume of the sound produced by the breakdown (as conventional) and a second device, e.g. may be a smartphone or tablet, with an indicator for displaying the (at least one) destination in the map or in the image captured by the camera.
    A calculation possibility for determining the possible fault locations o "o 2 is shown in FIG. 9. From the distance measurement values s v s 2 and the distance a between the position measurement values p 1 (p 2, the angle can be directly α determined (using the law of cosines), whereby the possible error locations o ,, o 2 are obtained. The calculation can for a 2 , a 3 ; s 2 , s 3 are repeated, resulting in the precise error location p as one of the two possible error locations o ,, o 2 .
    / 27 • ·
    Legend to the reference numbers:
    electric wire
    Surge voltage generator
    Surge voltage pulse
    Person mobile fine positioning device
    acquisition unit
    display unit
    Microphone electromagnetic sensor electronic signal processing unit
    transmitter
    receiver
    microprocessor unit
    display
    microprocessor
    Storage
    GPS receiver acoustic pulse
    soil
    ground
    Road course electromagnetic pulse
    Camera a v a 2 Position readings for the current position of the fine-tuning device f Defective location of the cable g Straight o "o 2 possible fault locations p Precise fault location s v s 2 Distance readings t Depth value u approximate position of the cable fault z Destination / 27 • ·
    patent attorneys
    Hofmann & Fechner
    Dr. Ralf Hofmann ····
    Dr. Thomas Fechner Hörnlingerstr. 3, PO Box 5 6830 Rankweil, Austria ··· * T * + 43 (¢ 552273 137 F +43 (0) 5522 73 137-10 IVI office@vpat.at I www.vpat.at
    28706/33 / ss
    20180313
    权利要求:
    Claims (4)
    [1]
    Method for fine localization of a cable fault of a buried cable (1) for the transmission of electrical energy, wherein a precise fine fault location (p) of the cable fault is determined on the basis of an approximate position (u) of the cable fault previously determined by a pre-location by means of a mobile fine location device (5 ) respective distances of the defective location (f) of the cable (1) from respective current positions of the mobile
    Feinortungseinrichtung (5) are determined, characterized in that at a first and a different second current position of the fine positioning device (5) of the fine positioning device (5) each by means of a GPS receiver (17) of the fine positioning device (5) a first and a second position measurement value (a "a 2 ) for the respective current position of the fine positioning device (5) and a first and a second one
    Distance measurement value (s ,, s 2 ) for the respective distance of the precise fault location (p) from the respective current position of the mobile fine location device (5) is determined and from the first and second position measurement values (a v a 2 ) and the first and second distance measurement values (s v s 2 ) at least one previously unknown possible fault location (o "o 2 ) is determined by the distance of the possible fault location (o ,, o 2 ) from the first current position of the fine positioning device (5) to the first distance measured value ( s,) and the distance of the possible fault location (o "o 2 ) from the second current position of the fine location device (5) corresponds to the second distance measurement value (s 2 ), and on a display (14) of the fine location device (5) in one of the Fine locating device (5) stored map of the vicinity of the approximate position (u) of the cable fault or in an image taken by a camera (23) of the mobile fine location device (5) at least one Zielo rt (z), which corresponds to at least one of the thus determined possible fault locations (o 1 ( o 2 ) is displayed.
    19/27
    A method according to claim 1, characterized in that for determining the respective distance measurement value (s, s 2 ) for the distance of the precise fault location (p) from the respective current position of the mobile fine positioning device (5) impulse voltage pulses (3) in the cable (1 ) are fed from the mobile fine positioning device (5) and the time difference (At) between a, caused by one of the surge voltage pulses, electromagnetic pulse (22), which is detected by means of an electromagnetic sensor (9) of the fine positioning device (5), and a through an acoustical pulse (18), which is detected by means of a microphone (8) and triggered by this surge voltage pulse, is measured and the respective distance measurement value (s "s 2 ) is determined by the fine positioning device (5) from this time difference (At) becomes.
    A method according to claim 2, characterized in that for determining the respective distance measured value (s "s 2 ) at least in the case of falling below a minimum value for the value obtained from time difference (s /) for the distance of the defective point (f) of the cable (1 ) a depth value (t) for the laying depth of the cable (1) is taken into account by the respective current position of the mobile fine positioning device (5) so that the distance measured value (s v s 2 ) for the distance of the on the ground vertically above the defective point ( f) of the cable fault from the current position of the mobile fine positioning device (5) is smaller than the value (s /) obtained from the time difference for the distance of the defective point (f) from the respective current position of the mobile fine positioning device (5 ).
    Method according to one of claims 1 to 3, characterized in that the determination of the at least one possible fault location (o 1 ( o 2 ) without
    20/27
    Attention of related to the floor plan representation course of the cable (1) takes place.
    [2]
    5. The method according to any one of claims 1 to 4, characterized in that at one of the first and second different current third position of the fine positioning device (5), which is not on a common line with the first and second current position of the fine positioning device (5) , from the mobile fine location device (5) a third
    Position measurement value (a 3 ) for the current position of the fine positioning device (5) and a third distance measurement value (s 3 ) for the distance of the precise fault location (p) from the current position of the mobile fine positioning device (5) is determined and based on the third position measurement value (a 3 ) and third
    Distance measurement (s 3 ) is determined, which of the two possible fault locations (o "o 2 ) corresponds to the precise fault location (p) by determining which of the two possible fault locations (o a , o 2 ) for the precise fault location (p ) the distance from the third current position of the
    Fine locating device (5) corresponds to the third distance measured value (s 3 ), and the thus determined precise fault location (p) on the display (14) of the fine positioning device (5) in the map or in the camera (23) recorded image as the destination (z ) is shown.
    [3]
    6. The method according to any one of claims 1 to 5, characterized in that a data transmission between the microphone (8) and the electromagnetic sensor (9) having detection unit (6) of the mobile fine positioning device (5) and one of the display (14) Display unit (7) of the mobile fine positioning device (5) is wireless.
    [4]
    7. The method according to any one of claims 1 to 6, characterized in that the detection unit (6) comprises a smartphone or tablet or is formed by a smartphone or tablet.
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    同族专利:
    公开号 | 公开日
    EP3546987A1|2019-10-02|
    AT521058B1|2020-10-15|
    CN110361626A|2019-10-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2508444A1|1975-02-27|1976-09-09|Howaldtswerke Deutsche Werft|Fault location device for buried electric cables - has auxiliary pickup producing tone-burst enhancement of detector signals|
    US4835478A|1987-02-17|1989-05-30|Haddon Merrill K|Method and apparatus for acoustic detection of faults in underground cables|
    EP2450716A2|2010-11-03|2012-05-09|Hagenuk KMT Kabelmesstechnik GmbH|Assembly for eliminating noise from acoustic signals during the determination of the position of sound in the ground|
    DE102010051213A1|2010-11-12|2012-05-16|Rohde & Schwarz Gmbh & Co. Kg|Measurement device for determining distance of e.g. defective high voltage insulator in high-voltage transmission line at electricity pylon, has unit for determining distance of location of interference source from measurement device|
    EP2669694A1|2012-06-01|2013-12-04|Hagenuk KMT Kabelmesstechnik GmbH|Method for targeted localisation of a fault point and a device|
    DE102010013613B4|2010-03-25|2013-07-04|Hagenuk KMT Kabelmeßtechnik GmbH|Method for fault location of cables|CN110446934A|2017-03-29|2019-11-12|保尔有限公司|The method for carrying out finely positioning for the cable fault to buried cable|
    CN110907749A|2019-11-19|2020-03-24|湖南国奥电力设备有限公司|Method and device for positioning fault underground cable|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA80/2018A|AT521058B1|2018-03-26|2018-03-26|Method for the fine localization of a cable fault in an underground cable|ATA80/2018A| AT521058B1|2018-03-26|2018-03-26|Method for the fine localization of a cable fault in an underground cable|
    EP19161864.4A| EP3546987A1|2018-03-26|2019-03-11|Method for determining the precise location of a cable fault in a buried cable|
    CN201910231178.XA| CN110361626A|2018-03-26|2019-03-26|Method for being accurately positioned the cable fault of buried cable|
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