Bending vibration meter for shaft in automobile

专利摘要:
PURPOSE: A bending vibration measuring apparatus for a vehicle shaft is provided to precisely measure bending vibration of the vehicle shaft while a vehicle is traveling by electromagnetic induction between a magnetic force generating section and an inductive coil installed in the vehicle. CONSTITUTION: A bending vibration measuring apparatus includes a permanent magnet(100), an inductive coil(200) spaced from the permanent magnet(100) by a predetermined distance, and a measuring device(300) for measuring bending vibration of a vehicle shaft based on a waveform generated from the inductive coil(200). The measuring device(300) includes a signal input section(310) generating an electric signal corresponding to an induced electromotive force induced from the inductive coil, a signal processing section(320), a storing section(330) and an output section(340) for outputting information stored in the storing section(330).
公开号:KR20040015575A
申请号:KR1020020047858
申请日:2002-08-13
公开日:2004-02-19
发明作者:김대운
申请人:현대자동차주식회사；
IPC主号:

专利说明:

Bending vibration meter for shaft in automobile
[15] The present invention relates to a axial bending vibration measuring apparatus of a vehicle, and more particularly to a axial bending vibration measuring apparatus of a vehicle capable of measuring the axial bending vibration in the driving state of the vehicle.
[16] Generally, special measuring equipment is used to measure bending vibration or torsional vibration of a rotating shaft of a vehicle.
[17] That is, since it is not possible to measure by mounting the sensor directly on the rotating shaft, the bending vibration and torsional vibration of the shaft in the non-contact state was measured using a laser measuring equipment as shown in FIG.
[18] However, since the laser measuring equipment is a device installed at a fixed place to measure an object, there is a problem in that the bending vibration of the shaft cannot be measured while the vehicle is running.
[19] For example, in the case of a propeller shaft, the laser measuring equipment described above cannot be used in a driving state because the rotating shaft rotates on the bottom surface of the vehicle as is the case with most rotating shafts.
[20] The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a shaft bending vibration measurement apparatus of a vehicle capable of measuring the bending vibration of the rotating shaft in the vehicle driving state. .
[1] 1 is a view showing a axial bending / torsional vibration measuring apparatus using a conventional laser,
[2] 2 is a schematic diagram of an apparatus for measuring axial bending vibration of a vehicle according to a preferred embodiment of the present invention;
[3] 3 is a schematic view of a truck to which the present invention is applied to measure the axial bending vibration of the propeller shaft;
[4] Figure 4 (a) to (c) is a schematic diagram for explaining the change in the magnitude and direction of the electromotive force according to the distance change between the permanent magnet and the induction coil,
[5] Figure 5 (a) to (c) is a view showing a change in distance between the permanent magnet and the induction coil installed on the shaft while the shaft is bent in accordance with the bending vibration generated during driving.
[6] <Description of the symbols for the main parts of the drawings>
[7] 10: engine 20: transmission
[8] 30: frame 41: front shaft
[9] 42: rear shaft 50: rear axle
[10] 61, 62, 63: Universal joint 70: Center bearing
[11] 80: bracket 100: permanent magnet
[12] 200: induction coil 300: measuring means
[13] 310: signal input unit 320: signal processing unit
[14] 330: storage unit 340: output unit
[21] In accordance with a preferred embodiment of the present invention, an apparatus for measuring shaft bending vibration of a vehicle includes: a magnetic force generator disposed on an outer circumferential surface of an shaft, an induction coil disposed to face the magnetic force generator, and an induction coil. It characterized in that it comprises a measuring means for measuring the bending vibration of the shaft by the induced electromotive force.
[22] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[23] Figure 2 is a schematic diagram of the axial bending vibration measuring apparatus of the vehicle according to a preferred embodiment of the present invention, as can be seen with reference to the same figure, the axial bending vibration measuring apparatus of the vehicle according to the present invention, the outer peripheral surface of the axis to be measured An annular permanent magnet 100 to be installed, an induction coil 200 which is spaced apart from the permanent magnet 100 by a predetermined interval and is attached to a vehicle body (for example, a bottom surface of the vehicle body), and It consists of a measuring means 300 for measuring the bending vibration of the shaft by the waveform of the induced electromotive force induced in the induction coil 200. However, in this case, the vehicle body in which the induction coil 200 is installed does not mean only the body of the vehicle, and the vehicle body includes all of the body of the vehicle such as a frame.
[24] The measuring means 300 is a signal input unit 310 for generating an electrical signal corresponding to the induced electromotive force induced in the induction coil 200, and processing the signal generated from the signal input unit information such as vibration frequency and amplitude And a signal processor 320 for storing the information, a storage unit 330 for storing information obtained by the signal processor, and an output unit 340 for outputting information stored in the storage unit.
[25] Here, the output unit 340 is a data output port for outputting bending vibration measurement information from the storage unit 330 according to a data request signal input from an external tester, a display device for displaying measurement information on a screen, or a measurement It may be a printer that prints information on a sheet of paper.
[26] 3 is a schematic view of a truck to which the present invention is applied to measure the axial bending vibration of the propeller shaft. In the truck to which the present invention is applied, a transmission 20 is connected to an output shaft of the engine 10 and the transmission 20 is provided. The propeller shaft is connected to the output shaft of the propeller shaft is connected to the rear axle (50) is the power of the engine is transmitted to the rear wheel which is the driving wheel.
[27] Since the transmission 20 and the rear axle 50 are long and there is a difference in height between the connecting portions on both sides, the propeller shaft consists of two parts, the front shaft 41 and the rear shaft 42, and the transmission 20 and the front. Between the shaft 41, between the front shaft 41 and the rear shaft 42, between the rear shaft 42 and the rear axle 50 are connected via a universal joint (61, 62, 63). .
[28] In order to keep the front shaft 41 and the rear shaft 42 at a predetermined angle set during the design, a center bearing 70 supporting the front shaft 41 is installed at the rear end of the front shaft 41. 70 is fixed to the frame 30 via the bracket (80).
[29] Of these, an annular permanent magnet 100 is inserted into the desired one of the front shaft 41 and the rear shaft 42, and the vehicle body (for example, the frame 30) at the point opposite to the permanent magnet 100 is inserted. The induction coil 200 is mounted, and the measuring means 300 is installed inside the vehicle body.
[30] For reference, in FIG. 3, the permanent magnet 100 is mounted on the front shaft 41.
[31] 4 (a) to (c) is a schematic view for explaining the change in the magnitude and direction of the electromotive force according to the distance change between the permanent magnet and the induction coil, as shown in (a) of FIG. Magnetic field lines M are generated from 100.
[32] Thus, as shown in (b) and (c) of Figure 4, when the relative movement is performed according to the distance between the permanent magnet 100 and the induction coil 200, the induction coil 200 by the electromagnetic induction phenomenon A current is induced at both ends of the induction coil 200 to generate an induced electromotive force.
[33] For reference, according to "Faraday's law", the magnitude of induced electromotive force is defined as being proportional to the temporal change of magnetic flux (magnetic flux) passing through the coil and proportional to the number of turns of the coil, that is, the number of turns n. Faraday's law can be used to determine the magnitude of induced electromotive force. In addition, according to "Lenz's law", the induced current flows in the direction of disturbing the movement of the magnet, that is, the direction of the magnetic flux passing through the coil. You can see the direction of.
[34] The present invention utilizes the electromagnetic induction phenomenon in which induced electromotive force is generated according to the relative distance change movement of the permanent magnet 100 and the induction coil 200 as described above.
[35] That is, after the vehicle is driven in a state in which the bending vibration measuring device of the shaft according to the present invention is mounted as shown in FIG. 3, if bending vibration occurs in the vertical direction in the front shaft 41, FIGS. As shown in (c), while the front shaft 41 is bent in the vertical direction, a movement occurs in which the vertical distance between the permanent magnet 100 and the guide coil 200 installed in the front shaft 41 is changed. do.
[36] By the relative distance change between the permanent magnet 100 and the induction coil 200 as described above, the organic electromotive force is generated in the permanent magnet 100 by the electromagnetic induction phenomenon, the signal input unit 310 of the measuring means 300 In, the electrical signal corresponding to the magnitude and direction of the induced electromotive force emitted from the induction coil 200 is generated.
[37] The signal generated from the signal input unit 310 is signal-processed by the signal processor 320 to obtain information on the bending vibration of the shaft (for example, vibration frequency and amplitude, etc.), and the information obtained by the signal processor 320. In addition to being stored in the storage unit 330 is output to the outside through the output unit 340.
[38] The present invention is described above by illustrating specific embodiments, but the present invention is not limited to the above embodiments. Those skilled in the art can easily make various changes and modifications to the present invention, and it should be noted that such variations or modifications are included within the scope of the present invention as long as the features of the present invention are used.
[39] As described above, the present invention is configured to measure the bending vibration of the shaft by the electromagnetic induction phenomenon between the magnetic force generating portion provided on the shaft to be measured and the induction coil provided on the vehicle body. There is an effect that can measure the bending vibration.

权利要求:
Claims (4)
[1" claim-type="Currently amended] In an automobile with an axle,
A magnetic force generating unit installed on an outer circumferential surface of the shaft,
An induction coil disposed to face the magnetic force generating unit,
And a measuring means for measuring the bending vibration of the shaft by the induced electromotive force induced by the induction coil.
[2" claim-type="Currently amended] The apparatus of claim 1, wherein the magnetic force generating unit is an annular permanent magnet.
[3" claim-type="Currently amended] The method of claim 1, wherein the measuring means,
A signal input unit generating an electrical signal corresponding to the induced electromotive force induced by the induction coil;
A signal processing unit for processing information generated from the signal input unit to obtain information about the bending vibration of the shaft;
A storage unit for storing the information obtained by the signal processing unit,
And an output unit for outputting information stored in the storage unit.
[4" claim-type="Currently amended] 4. The shaft bending vibration measuring apparatus according to any one of claims 1 to 3, wherein the shaft to be measured is a shaft that rotates in the circumferential direction when the vehicle is driven.

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同族专利:

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公开号 | 公开日

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KR100482103B1|2005-04-13|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2002-08-13|Application filed by 현대자동차주식회사

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2002-08-13|Priority to KR10-2002-0047858A

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2004-02-19|Publication of KR20040015575A

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2005-04-13|Application granted

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2005-04-13|Publication of KR100482103B1

优先权:

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申请号 | 申请日 | 专利标题

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KR10-2002-0047858A|KR100482103B1|2002-08-13|2002-08-13|Bending vibration meter for shaft in automobile|