• 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:
    Provided are a heliostat calibration device and a heliostat calibration method that can suppress time-change-dependent control error increases and can reduce calibration frequency. The present invention is provided with: an initial position information acquisition unit that acquires initial position information for a heliostat; a theoretical value calculating unit that calculates from the heliostat initial position information and sun position information a theoretical value that is related to the orientation of the heliostat; a deviation calculation unit that, using as input an actual measured value for the orientation of the heliostat, calculates the deviation between the theoretical value and the actual measured value at least two times a day; and a coordinate calibration unit that, when the deviation exceeds a threshold value, calibrates the coordinates of the heliostat such that the deviation is at or below the threshold value.
    公开号:ES2617569A2
    申请号:ES201690043
    申请日:2015-03-17
    公开日:2017-06-19
    发明作者:Kohei Shinozaki；Takahiro Marumoto；Satoshi Tadakuma；Tetsuo Shikata
    申请人:Mitsubishi Hitachi Power Systems Ltd；
    IPC主号:
    专利说明:

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    HELIOSATAT CALIBRATION DEVICE AND HELIOSTAT CALIBRATION METHOD
    Technical field
    The present invention relates to a calibration device and a calibration method for a heliostat used in a tower-type solar thermal collection system.
    Prior art
    In general, a heliostat used in a tower-type solar thermal energy collection system includes a reflective mirror that reflects sunlight, a support post that supports the reflective mirror, and a drive device that tilts the reflective mirror. In order to concentrate sunlight on a receiver installed in the tower, the orientation (azimuth angle and elevation angle) of the heliostat is adjusted based on a control signal related to the angle of inclination of the reflecting mirror.
    A basic principle for the control of the orientation of the heliostat will be described by the use of Figures 10 and 11. Figure 10 illustrates a relationship between the azimuthal angle, the elevation angle, and a normal vector of the reflecting mirror. Usually a heliostat has a configuration in which at least one angle of the azimuthal angle and of the elevation angle (in most cases, both the azimuthal angle and the elevation angle) of the normal vector of the reflecting mirror can be changed at any angle. Therefore, as illustrated in Figure 10, if the normal vector of the reflecting mirror is known, the azimuthal angle and the elevation angle of the heliostat to concentrate sunlight on the receiver can be calculated. The normal vector of the reflecting mirror can be calculated based on the law of reflection if the incident light vector and the reflected light vector are known. In the description provided below, the azimuth angle and elevation angle can be collectively referred to as the "controlled angle."
    Figure 11 illustrates a calculation method for the incident light vector and the reflected light vector. First, the azimuthal angle and the angle of elevation of the sun can be calculated based on the longitude and latitude information in a position where the heliostat is installed and the date and time information at any time (in a period of time in which the heliostat you want to control). By
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    therefore, the incident light vector can be obtained by converting the azimuthal angle and the angle of elevation of the sun into a vector. Next, the three-dimensional coordinates of the position of the heliostat (center of the reflecting mirror - starting point of the normal mirror vector) and the three-dimensional coordinates of an objective point (for example, a receiving light receiving surface), which is A target of the reflected light is previously known at a stage where the device is reflecting a drawing or at a stage where the device is installed. Therefore, the reflected light vector can be calculated from a positional relationship between these sets of three-dimensional coordinates.
    Hereinafter, the controlled angle (azimuthal angle and elevation angle) of the heliostat calculated from the normal vector obtained based on the incident light vector and the reflected light vector, that is, the controlled angle of the heliostat calculated from the Basic principle above, referred to as "theoretical value". On the other hand, reference will be made to the controlled angle (azimuthal angle and elevation angle) of the heliostat when the reflected light is actually concentrated at the point of detention as a "measured value".
    Figure 12 is a graph that compares the measured value and the theoretical value as a function of time. As understood from Figure 12, a deviation of, for example, + 1.5 ° or less is generated between the measured value and the theoretical value in a day for a number of various factors, such as an error after the fabrication of the heliostat and an error in the position when the heliostat is installed. If the deviation can be reduced to, for example, + 0.2 ° or less by installing the heliostat with high precision or by measuring the installation error, the heliostat, in theory, can radiate the reflected light with the surface of the Receiver light reception at all times. However, a solution that uses the precision of the installation of the heliostat and the like to absorb the deviation results in a long construction time and a huge construction cost and therefore may not be a realistic solution.
    A technology that reduces deviation by performing calibration of the heliostat after installation is known (for example, refer to PTL 1). In PTL 1, the light reflected after the calibration is concentrated on a plurality of objective points such as cameras arranged in a field, and the position of the heliostat to be adjusted is estimated from the deviation between the measured value and the theoretical value in that moment. According to PTL 1,
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    Because a high precision installation or installation error measurement is not required, the duration of construction time and construction costs can be reduced.
    Appointment List
    Patent Literature
    [PTL 1] United States Patent No. 7,994,459 Summary of the Invention Technical Problem
    However, in the technology disclosed in PTL 1 (hereinafter referred to as a related art technique), only the deviation between the measured value and the theoretical value related to a time interval of one day in which the calibration is performed They can be corrected. This will be described in detail by the use of Figure 13. Figure 13 is a diagram comparing the measured value, the theoretical value based on the basic principle above, and a theoretical value in a case of performing the calibration using the technique of related art. As illustrated in Figure 13, if the related art technique is used, a measurement value L11 coincides quite well with a theoretical value L13 of the related art technique in a time interval in which the calibration is performed. However, the deviation between the measured value L11 and the theoretical value L13 of the related art technique is large at other time intervals, and a situation in which the deviation is greater than the deviation between the measured value L11 and a value Theoretical L12 can be result according to a time interval. As such, in PTL 1, it is difficult to reliably concentrate the light reflected from the heliostat on the receiver for a long period of time, which raises the problem that the number of calibrations increases in order to reliably concentrate the light solar in the receiver.
    The present invention is designed in view of the above problem, and an object thereof is to provide a calibration device and a calibration method for a heliostat capable of reducing the number of calibrations and concentrating sunlight on a receiver for a long period. of time.
    Solution to the Problem
    In order to achieve the above object, according to the present invention, a calibration device for a heliostat that reflects sunlight towards a receiver following the sun includes a unit for obtaining information of the initial position that obtains information from the initial position of the heliostat, a
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    unit of calculation of the theoretical value that calculates a theoretical value in relation to the orientation of the heliostat from the initial position information of the heliostat and the position information of the sun, a unit of calculation of the deviation that obtains a measured value of the orientation of the heliostat as an input and calculates the deviation between the theoretical value and the measured value at least at two times of the day, and a coordinate calibration unit that calibrates, in a case where the deviation exceeds a threshold, the coordinates of the heliostat with the coordinates in which the deviation is less than or equal to the threshold.
    In order to achieve the above object, according to the present invention, a calibration method for a heliostat that reflects sunlight towards a receiver following the sun includes a step of obtaining information on the initial position of the heliostat, a step of calculate a theoretical value related to the orientation of the heliostat from the initial position information of the heliostat and the position information of the sun, a step of obtaining a measured value of the orientation of the heliostat as an input and calculate the deviation between the value theoretical and the value measured at least at two times of the day, and a calibration stage, in a case where the deviation exceeds a threshold, of the coordinates of the heliostat with the coordinates in which the deviation is less than or equal to the threshold.
    Advantageous effects of the invention
    In accordance with the present invention, the number of calibrations can be reduced, and sunlight can be concentrated on a receiver for a long period of time. Problems, configurations and effects other than those described above will become apparent from a realization described below.
    Brief description of the drawings
    Figure 1 is a configuration diagram of the entire tower-type solar thermal energy collection system to which the present invention is applied.
    Figure 2 is a block diagram of a calibration device according to an embodiment of the present invention.
    Figure 3 is a flow chart illustrating a calibration procedure for a heliostat.
    Figure 4 is a diagram illustrating the details of Step S1 to Step S3 of Figure 3. In Figure 4, on the left, the four are represented together
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    cardinal points, a top view of the solar tower collection system.
    Figure 5 is a diagram illustrating the details of Step S1 to Step S3 of Figure 3.
    Figure 6 is a diagram illustrating the details of Step S4 of Figure 3.
    Figure 7 is a diagram illustrating the details of Step S6 to Step S8 of Figure 3.
    Figure 8 is a diagram illustrating an effect in a case of performing calibration in accordance with the present invention compared to an initial state.
    Figure 9 is a diagram illustrating the details of Step S9 of Figure 3.
    Figure 10 is a diagram illustrating a basic principle for controlling the azimuthal angle and the elevation angle of the heliostat.
    Figure 11 is a diagram illustrating a basic principle for controlling the azimuthal angle and the elevation angle of the heliostat.
    Figure 12 is a diagram illustrating a relationship between a theoretical value and a measured value of the heliostat.
    Figure 13 is a diagram illustrating changes in the azimuthal angle and elevation angle of the heliostat in a case of performing the calibration according to a related art technique.
    Figure 14 is a flow chart illustrating a procedure when the heliostat is calibrated with separation between the azimuthal angle and the elevation angle.
    Description of the realizations
    Hereinafter, an embodiment of the present invention will be described by the use of the drawings. Figure 1 is a configuration diagram of the entire tower-type solar thermal energy collection system to which a calibration device of a heliostat according to the embodiment of the present invention is applied, and Figure 2 is a block diagram of the heliostat calibration device according to the embodiment of the present invention.
    As illustrated in Figure 1, a tower-type solar thermal energy collection system (1) has a configuration that reflects the incident light (5) that falls from a sun (4) as the reflected light (8) using a reflective mirror (7)
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    installed in a heliostat (6) that follows the sun (4) and concentrates the reflected light (8) on a light receiving surface of a receiver (10) installed in an upper portion of a tower (9). Although the tower-type solar thermal energy collection system in the present embodiment is a so-called south-facing system in which the heliostat (6) is arranged on the south side of the receiver (10) (see Figure 4), the The present invention is not limited to this system.
    The heliostat (6) is configured from a support post (11) that is fixedly installed on the floor, the reflective mirror (7) that is arranged to freely lean over the support post (11), and a drive device (13) that adjusts the angle of inclination (orientation) of the reflective mirror (7) based on a control signal (12). A control device (calibration device) (2) of the heliostat (6) calibrates the three-dimensional coordinates of the heliostat (6) by performing a calculation described below based on the image information, the intensity information of the light and the temperature information of an observation device (15) of the receiver that observes the receiver (10) and functions as an output terminal of detention point information (30) and based on an instruction of geometric information, an instruction of calibration and information of irradiation instruction of an output terminal of instruction information (35). The control device (2) emits the control signal (12) which is a drive instruction to the drive device (13) of the heliostat (6). The drive device (13) controls the azimuthal angle and the elevation angle of the reflective mirror (7) based on the control signal (12).
    As illustrated in Figure 2, the control device (2) is configured to mainly include an instruction information determination unit (41), a position information storage unit (42), a value calculation unit of instruction (43), an automatic irradiation detection unit (44), an irradiation information storage unit (45), a position information adjustment unit (46), a correction function creation unit of time (47), and a time correction function storage unit (48). Each function of a unit for obtaining initial position information, a unit of calculation of the theoretical value, a unit of calculation of the deviation, and a unit of coordinate calibration of the present invention is performed by a CPU, not shown, of the control device (2).
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    The instruction information determination unit (41) obtains the geometric information instruction (target heliostat, installation position information, and longitude and latitude information), the calibration instruction (target heliostat, number of measurements), and the irradiation instruction information (target heliostat, irradiation date and time information) from the instruction information output terminal (35) as an input and issues the irradiation instruction date and time information to the calculation unit of the instruction value (43), issues the calibration instruction to the automatic irradiation detection unit (44), and stores installation position information and longitude and latitude information in the position information storage unit (42 ).
    The automatic irradiation detection unit (44) issues the position information (instruction value) of the heliostat after calibration to the drive device (13) based on the image information, the light intensity information, and the input of temperature information from the information output terminal of the detention point (30) and the input of the calibration instruction of the instruction information determination unit (41).
    The automatic irradiation detection unit (44) stores the date and time information and the instruction value information in the irradiation information storage unit (45). The position information adjustment unit (46) reads the date and time information and the instruction value information stored in the irradiation information storage unit (45) based on the output of the automatic irradiation detection unit (44) and instructs the time correction function creation unit (47) to create a time correction function. At this point, the data is read and written, various calculations, and the like are made between the position information adjustment unit (46) and the position information storage unit (42).
    The time correction function creation unit (47) creates the time correction function using an error correction function described below and stores the time correction function in the time correction function storage unit ( 48). The unit of calculation of the instruction value of (43) calculates the instruction value of the controlled angle of the heliostat (6) based on the date and time information of the instruction
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    irradiation of the instruction determination information unit (41), the installation position information and the longitude and latitude information stored in the information storage position unit (42), and the time correction function stored in the storage unit of the time correction function (48) and issues the instruction value to the drive device (13) of the heliostat (6).
    Next, the calibration details performed by the control device (2) will be described. Figure 3 is a flow chart illustrating the details of a calibration procedure performed by the control device (2). The following process is performed a number of times corresponding to the number of heliostats (6).
    First, the control device (2) obtains the parameters of the heliostat (6) in Step S1. Specifically, the control device (2) obtains information on the longitude and latitude of the heliostat (6) and the three-dimensional coordinates (Xp, Yp, Zp) of an initial Pint setting position of the heliostat (6) with the three-dimensional coordinates of the point of detention which is the target of the reflected light of the heliostat (6) as the origin. The information obtained in Step S1 is data in a design. The stop point may not necessarily be established as the origin if the reflected light vector can be calculated.
    Next, the control device (2) calculates a theoretical value, based on Pint and the measured value of the controlled angle of the heliostat (6) at a time t and performs a process of calculating the deviation between the measured value and the theoretical value (Stage S2) a number of times so that time t is established (Stage S3). The processes of Step S2 and Step S3 will be described in detail by the use of Figures 4 and 5. When the heliostat calibration (6) is performed, a ts moment of passage through the heliostat meridian line (6) it is established at the moment when the azimuth angle formed by the reflecting mirror (7) of the heliostat (6), a stop point (18), and the sun (4), at the date and time of calibration is equal to 0 °.
    Taking into account that the duration of time from sunrise to ts is a time TF and the time duration from ts to sunset is a time TL, a measured value Dam, t and a theoretical value DintAi, t of an azimuth angle DA of heliostat (6) that concentrates light at the point of arrest (18) and a deviation of the azimuth angle dpDA, t are calculated at least in two or more moments throughout a day and desirably at each time of one or more moments in each
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    of time tF and time tL as illustrated in Figure 5. Similarly, a measured value DEm, t and a theoretical value DintEi, t of an elevation angle DE of the heliostat (6) that concentrates light at the point of detention (18) and a deviation of the elevation angle dpDE, t are calculated. In one case, for example, where one moment is in each of the time tF and the time tL (two moments in total), the number of adjustments in Step S3 is two, and the control device (2) performs the process of Stage S2 twice.
    The reason why the deviation is desirably calculated from the measured value and the theoretical value at one or more times before and after the moment ts passes through the meridian line is that the deviation between the measured value and the theoretical value before the moment ts passes through the meridian line, it is inverted after the moment ts passes through the meridian line. That is, because the deviations between the measured values and the theoretical values of the azimuth angle and the elevation angle before the moment ts are reversed after the moment ts as illustrated in Figure 12, performing the calibration of the heliostat (6) by obtaining the deviation between the measured value and the theoretical value before and after the moment ts passing through the meridian line allows the reflected light of the heliostat (6) to concentrate on the receiving light receiving surface (10 ) that you receive, which is the point of detention, for a longer period of time. Figures 12A and 12C show two graphs in which the ordinate axis represents, respectively, the different values of the azimuth angle and elevation angle (in sexagesimal degrees); the axis of abscissa represents the different moments of time; in these graphs a curve L8, corresponding to the measured value, and another curve, L9, corresponding to the theoretical value are represented; the point of intersection of both curves L8 and L9 corresponds to the instant ts. Figures 12B and 12D show two graphs in which the ordinate axis represents the angle deviation values (in sexagesimal degrees) between measured value and theoretical value, and the abscissa axis represents the different moments of time; curve L10 represents the deviation between measured value and theoretical value, where it can be observed that said deviation is zero at the moment ts. Figure 13 shows graphs, analogous to those of Figure 12, where in addition to a curve L11 corresponding to the measured value and a curve L12 corresponding to the theoretical value, another curve L13 corresponding to the values obtained in accordance with the related art technique; Likewise, a time interval, At, after calibration is highlighted. In the lower graphs of Figure 13,
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    they represent the curves L14 of deviation between measured value and theoretical value and L15 of deviation between measured value and the value according to the related art technique.
    Next, the control device (2) determines whether each deviation of the azimuthal angle DA and the elevation angle DE of the heliostat (6) is less than or equal to a threshold in Step S4. Specifically, as illustrated in Figure 6, a maximum value dpDAmax and a minimum value dpDAmin of the deviation of the azimuth angle dpDA, t and a maximum value dpDEmax and a maximum value dpDEmin of the deviation of the elevation angle dpDE, t are subtracted, and a determination is made as to whether the differences (dpDAmax - dpDAmin) and (dpDEmax - dpDEmin) are less than or equal to a previously established threshold. If the differences are less than or equal to the threshold (If in S4), the control device (2) stores Pint (Xp, Yp, Zp) in a memory (Step S5) and ends calculation.
    Meanwhile, a transition is made to the S6 process and subsequent processes in a case where the differences exceed the threshold. A method of estimating the position of the heliostat (6), although there are several methods, for example, obtains a constant of passage width (change) to as input, prepares six parameters of (Xp + a, Yp, Zp), ( Xp - a, Yp, Zp), (Xp, Yp + a, Zp), (Xp, Yp - a, Zp), (Xp, Yp, Zp + a), and (Xp, Yp, Zp + a) that include the pitch width constant, and get the Pint (Xp, Yp, Zp) for which the difference (dpDAmax - dpDAmin) and the difference (dpDEmax - dpDEmin) are less than or equal to the threshold and are the mm of the theoretical value calculated based on the measured value and the six parameters (Stage S6 to Stage S8).
    The processes from Step S6 to Step S8 are illustrated in Figure 7. As will be understood from Figure 7, if the position information (Xp, Yp, Zp) of the heliostat (6) is changed, the theoretical value changes accordingly (change the graph of the theoretical value in one day). New coordinates of the heliostat (6) are calibrated with the coordinates (Xp, Yp, Zp) of the heliostat (6) where the theoretical value coincides with the value also measured in the graph, and the coordinates (Xp, Yp, Zp) are used to control heliostat (6). The initial coordinates of the heliostat (6) are calibrated with the coordinates (x2, y2, z2) in the example of Figure 7. The upper graph of Figure 7 represents the different values of the controlled angle (in degrees) sexagesimal) and in the axis of abscissa the different moments in time; four curves are represented, where L1 represents the measured value of the angle; L2 represents the theoretical value with respect to the predetermined position information; and L3 and L4 represent different theoretical values regarding
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    to the assumed position information. On the other hand, the lower graph of Figure 7 represents the deviation from the measured value (in sexagesimal degrees) in the ordinate axis and in the abscissa axis the different instants of time; three curves are represented, where L5 represents the deviation from the position information, and; L6 and L7 represent different deviations from the assumed position information; In this lower graph of Figure 7 it is observed that the theoretical value based on assumed position information (x2, y2, z2) coincides with the theoretical value with a small deviation, d.
    Figure 8 illustrates a comparison between the differences (dpDAmax - dpDAmin) and (dpDEmax - dpDEmin) calculated based on the initial adjustment position of the heliostat (6) and the differences (dpDAmax - dpDAmin) and (dpDEmax - dpDEmin) after the processes from Stage S6 to Stage S8 are performed. As illustrated in Figure 8, the amplitude of the deviation in case of changing the position of the heliostat (6) by performing the processes from Step S6 to Step S8 is understood to be smaller than the amplitude of the deviation based on the initial position in one day. This means that the error in the control of the heliostat (6) due to temporary change is reduced by performing calibration in accordance with the present invention.
    Then, the control device (2), in S9, stores Pint (Xp, Yp, Zp) with which the differences mentioned above are the minimum in memory and creates the error correction function in order to correct the remaining deviation. Figure 9 is a diagram illustrating the error correction function created in S9. It is known that the error in the controlled angle of the heliostat (6) is generated symmetrically near the moment when the sun passes through the meridian line. Therefore, the error correction function is created to correctly match the error as well. For example, a sigmoid function that changes around the meridian line and changes in the maximum value and the minimum value of the remaining error is considered. The sigmoid function is a function that can be created if two points are fixed in a day, unlike a polynomial. Therefore, the deviation can be corrected by measuring the measured value at least twice.
    As already mentioned, Figure 10 illustrates a relationship between the azimuthal angle, the elevation angle, and a normal vector of the reflecting mirror. In this Figure 10, a top view of the heliostat (6) is shown in the upper left and schematically, where the
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    normal vector, n, of the reflecting mirror (7), and the range of variation of the azimuthal angle control, Caz; in the lower left part of Figure 10, a side view of the heliostat (6) is shown schematically, with the range of variation of the elevation angle control, Celev; Finally, on the right side of Figure 10 the reflecting mirror (7) is represented, with the incident light vector (5), and the reflected light vector (8), inclined respectively at an angle 0 with respect to the normal vector , n, of the reflective mirror (7).
    As also mentioned above, Figure 11 serves as a basis for describing a calculation method, by controlled angle, of the incident light vector (5) and the reflected light vector (8), as well as the normal vector, n, of the reflective mirror (7). First, the azimuthal angle and the angle of elevation of the sun (4) can be calculated based on the longitude and latitude information in a position where the heliostat (6) is installed and the date and time information at any time ( in a period of time in which the heliostat is to be controlled). Therefore, the incident light vector (5) can be obtained by converting the azimuthal angle and the angle of elevation of the sun (4) into a vector. Next, the three-dimensional coordinates (Xp, Yp, Zp) of the heliostat position (6) (center of the reflective mirror 7 - starting point of the normal vector, n, of the mirror) and the three-dimensional coordinates ((a, b, c) or origin (0, 0, 0)) of an objective point (10) (for example, a receiving light receiving surface), which is a target of the reflected light are previously known at a stage where the device It is reflecting a drawing or at a stage where the device is installed. Therefore, the reflected light vector (8) can be calculated from a positional relationship between these sets of three-dimensional coordinates.
    As described so far, the position information of the heliostat (6) with which the deviation between the measured value and the theoretical value is less than or equal to the threshold at least in two or more moments can be stored by realizing the calibration in the present realization. Therefore, the error in the control of the heliostat (6) can be reduced, and sunlight can be concentrated on the light receiving surface of the receiver (10) for a long period of time. That is, once the calibration is performed, it is unlikely that sunlight will travel from the receiver (10) for a long period of time. If sunlight is unlikely to shift from the receiver (10), the number of calibrations can be reduced. Therefore, the calibration effort can be significantly reduced.
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    The present invention is not limited to the previous embodiment and includes various examples of modification. For example, the above embodiment is described in detail in order to describe the present invention in an easily understandable manner, and the present invention is not necessarily limited to an embodiment that includes all of the configurations described. Each of the configurations, functions, processing units, processing means and the like described above can be performed, partially or totally, with a hardware and, for example, can be designed by using an integrated circuit. Each of the configurations, functions, and the like described above can be performed by software, in such a way that a processor interprets and executes programs performing each function. The information concerning the programs, tables, files and the like that perform each function can be stored in a storage device such as a memory, a hard disk or an SSD or in a recording medium such as an IC card, a card SD, or a DVD.
    The calibration device according to the present invention can be applied to various solar thermal energy collection systems such as one of the Fresnel type, in addition to the tower solar thermal energy collection system.
    The control device (2) according to the embodiment of the present invention can perform the calibration with the separation between the azimuthal angle and the elevation angle of the heliostat (6) as illustrated in Figure 14 instead of the calibration procedure which is illustrated in Figure 3. That is, as illustrated in Figure 14, the control device (2) creates the position information and sigmoid function related to the azimuth angle of the heliostat (6) in S101 to S109 and create the position information and sigmoid function related to the elevation angle of the heliostat (6) in S111 to S119. The same effect as the previous embodiment can be achieved in this way as well.
    List of reference signs
    2 CONTROL DEVICE (CALIBRATION DEVICE)
    4 SOL
    10 RECEIVER
    41 INSTRUCTION INFORMATION DETERMINATION UNIT (INITIAL POSITION INFORMATION OBTAINING UNIT)
    42 POSITION INFORMATION STORAGE UNIT
    43 INSTRUCTION VALUE CALCULATION UNIT
    44 AUTOMATIC IRRADIATION DETECTION UNIT,
    45 IRRADIATION INFORMATION STORAGE UNIT
    46 POSITION INFORMATION ADJUSTMENT UNIT
    47 TIME CORRECTION FUNCTION CREATION UNIT
    5 48 STORAGE CORRECTION FUNCTION STORAGE UNIT
    WEATHER
    ts MOMENT OF PASSAGE BY UNEA DE MERIDIANO
    权利要求:
    Claims (5)
    [1]
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    1. A calibration device for a heliostat that reflects sunlight towards a receiver following the sun, the device comprising:
    a unit for obtaining information on the initial position that obtains information on the initial position of the heliostat;
    a unit of calculation of the theoretical value that calculates a theoretical value in relation to the orientation of the heliostat from the initial position information of the heliostat and the position information of the sun;
    a unit of calculation of the deviation that obtains a measured value of the orientation of the heliostat as an input and calculates the deviation between the theoretical value and the measured value at least at two times of the day; Y
    a coordinate calibration unit that calibrates, in a case where the deviation exceeds a threshold, the coordinates of the heliostat with the coordinates in which the deviation is less than or equal to the threshold.
    [2]
    2. The calibration device for a heliostat according to claim 1,
    in which when the moment in which the azimuth angle formed by the heliostat, the receiver, and the sun is equal to 0 ° is a moment of passage through the meridian line, the unit of calculation of the deviation calculates the deviation in each one or more moments before and after the moment of passage through the meridian line.
    [3]
    3. The calibration device for a heliostat according to the
    claim 2,
    in which the coordinate calibration unit calibrates the coordinates of the heliostat with the coordinates at which the deviation is less than or equal to the threshold and is one mm.
    [4]
    4. The calibration device for a heliostat according to the
    claim 2,
    in which the coordinate calibration unit calibrates the heliostat coordinates for each azimuth angle and each elevation angle of the heliostat.
    [5]
    5. A calibration method for a heliostat that reflects sunlight towards a
    receiver following the sun, understanding the method:
    a step of obtaining information on the initial position of the heliostat; a step of calculating a theoretical value in relation to the orientation of the heliostat from the initial position information of the heliostat and the information 5 of the sun's position;
    a step of obtaining a measured value of the orientation of the heliostat as an input and calculating the deviation between the theoretical value and the measured value at least at two times of the day; Y
    a step of calibrating, in a case where the deviation exceeds a threshold, the 10 coordinates of the heliostat with the coordinates in which the deviation is less than or equal to the threshold.
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    优先权:
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    JP2014-066793|2014-03-27|
    JP2014066793|2014-03-27|
    PCT/JP2015/057937|WO2015146723A1|2014-03-27|2015-03-17|Heliostat calibration device and heliostat calibration method|
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