Motor vehicle headlamp detector calibrator calibration device and calibration method

Abstract

The invention provides a calibration device for a headlamp detector calibrator. The calibration device comprises a plane coordinate positioning mechanism and a positioning adjusting mechanism, the plane coordinate positioning mechanism comprises a vertical installation flat plate, and the vertical installation flat plate is connected with a luminosity head. The positioning adjusting mechanism comprises a tripod; the tripod is connected with a first installation platform for installing the standard lamp through an angle fine adjustment mechanism, the first installation platform is further connected with a second installation platform for installing the laser range finder through a height adjustment mechanism, and the height adjustment mechanism is used for adjusting the height of the laser range finder through the standard lamp so that the center line of the measuring face of the laser range finder can be tightly attached to the light-emitting face of the standard lamp. The laser range finder is used for testing the distance between the light emitting surface of the standard lamp and the working surface of the luminosity head. According to the invention, the plane coordinate positioning mechanism is matched with the positioning adjusting mechanism, so that the luminous intensity and the optical axis angle of the calibrator of the motor vehicle headlamp detector are accurately calibrated.

Description

Technical Field

[0001] The present invention relates to a calibration device and a calibration method for a calibrator of a motor vehicle headlamp tester, and belongs to the technical field of calibration of high and low beam calibrators of motor vehicle headlamp testers. Background Art

[0002] Currently, when domestic testing institutions detect the luminous intensity of the standard lamp of the calibrator of the headlamp tester, a measuring device composed of a coordinate plate, an adjustable lifting table and an illuminometer is adopted. By adjusting the optical axis angle of the calibrator forward and backward, the optical axis angle at the maximum illuminance of the standard lamp of the calibrator is found in the plane of the coordinate plate, and the average value is taken to respectively determine the position of the calibrator to be detected in the horizontal or vertical direction, and then the luminous intensity test of the standard lamp of the calibrator is carried out. Due to the gap existing in the screw rod of the optical axis angle rotation knob of the calibrator, this test method cannot ensure that the center line of the optical axis of the standard lamp of the calibrator is perpendicular to the working plane of the coordinate plate, and at the same time affects the detection distance from the standard lamp surface to the coordinate plate surface, and there are errors in the luminous intensity test data; when detecting the indication value of the optical axis angle of the calibrator, the testing institution generally determines the distance deviating from the origin by the light spot projected by the laser on the calibrator onto the coordinate plate; when actually reading, affected by the size and brightness of the light spot, it is very difficult to see the scale line of the light spot center on the coordinate plate, and high-quality detection of the calibrator cannot be achieved.

[0003] Currently, the methods for calibrating the calibrator of the headlamp tester mainly include the coordinate plate method and the image processing method. As an image processing method for indirect measurement, due to its complex structure, high cost, complicated implementation steps and poor operability, it is rarely used in actual applications.

[0004] Within the scope of the publicly available literature searched in China, there is no research report on a complete measuring device for the calibrator of the headlamp tester using the coordinate plate method. How to design a calibration device for the calibrator with convenient operation, accurate alignment and feasible method is urgently to be solved. Summary of the Invention

[0005] The purpose of the present invention is to provide a calibration device and a calibration method for a calibrator of a motor vehicle headlamp tester. By matching a planar coordinate positioning mechanism with a positioning and adjusting mechanism, the planar coordinate plate of the calibrator of the headlamp tester can be quickly aligned, and the laser power meter is used to measure the extreme value of the laser power, and the coordinate values of the light spot center on the coordinate axis are accurately located, so as to achieve accurate calibration of the luminous intensity and optical axis angle of the calibrator of the motor vehicle headlamp tester.

[0006] To achieve the above purpose / to solve the above technical problems, the present invention is implemented by adopting the following technical solutions.

[0007] On the one hand, the present invention provides a calibration device for a calibrator of a headlamp tester, including: a planar coordinate positioning mechanism and a positioning and adjusting mechanism;

[0008] The planar coordinate positioning mechanism includes: a vertically installed flat plate, a moving mechanism, a digital display mechanism, and a photometric head. The vertically installed flat plate is connected to the digital display mechanism and the photometric head through a moving mechanism that can move horizontally or vertically.

[0009] The photometric head includes: a standard illuminometer and a laser power meter. When the photometric head is a standard illuminometer, it is used to read the illuminance value of the standard lamp of the headlight tester calibrator. When the photometric head is a laser power meter, it is used to measure the deviation of the center of the light spot emitted by the laser light source of the headlight tester calibrator.

[0010] The digital display mechanism is used to display the real-time coordinates of the photometric head.

[0011] The positioning and adjusting mechanism includes: a tripod, an angle fine-tuning mechanism, a first mounting platform, and a second mounting platform.

[0012] The tripod is connected to the first mounting platform through the angle fine-tuning mechanism. A standard lamp is connected to the first mounting platform. The first mounting platform is also connected to the second mounting platform through a height adjusting mechanism. A laser rangefinder is connected to the second mounting platform. The height adjusting mechanism is used to adjust the height of the laser rangefinder for the standard lamp, so that the center line of the measuring surface of the laser rangefinder is close to the light-emitting surface of the standard lamp and aligned with the center of the filament of the standard lamp. The laser rangefinder is used to measure the distance from the light-emitting surface of the standard lamp to the working surface of the photometric head.

[0013] Furthermore, the planar coordinate positioning mechanism further includes: a guide rail slider, a fixing plate, and a first workbench.

[0014] The fixing plate is connected to a Y-axis digital display scale, a Y-axis linear guide rail, and a guide rail slider.

[0015] The moving mechanism includes: an upper X-axis linear guide rail, a lower X-axis linear guide rail, and a Y-axis linear guide rail.

[0016] The digital display mechanism includes: a Y-axis digital display scale, a scale display tray, a scale display, a scale frame, and an X-axis digital display scale.

[0017] The upper X-axis linear guide rail and the lower X-axis linear guide rail are installed in parallel on the upper and lower sides of the vertically installed flat plate. The two ends of the Y-axis linear guide rail are respectively connected to the upper X-axis linear guide rail and the lower X-axis linear guide rail through guide rail sliders. The Y-axis digital display scale is connected to the Y-axis linear guide rail.

[0018] The scale frame of the Y-axis digital display scale is connected to the first workbench, the Y-axis linear guide rail, and the scale display tray. The scale display is installed on the scale display tray.

[0019] The X-axis digital display scale is installed on the vertically installed flat plate, and its scale frame is connected to the lower X-axis linear guide rail.

[0020] Further, the planar coordinate positioning mechanism further includes: a triangular base, a base horizontal adjustment screw, and a spirit level;

[0021] The spirit level is installed at the edge of the outer frame of the vertical installation flat plate and is used for adjusting the horizontal and vertical positions of the entire positioning mechanism;

[0022] The base horizontal adjustment screw is installed at the edge of the triangular base and is used for adjusting the working state of the entire positioning mechanism.

[0023] Further, the angle fine-tuning mechanism includes: an angle adjustment plate, an angle left-right fine-tuning unit, and an angle up-down fine-tuning unit. The angle left-right fine-tuning unit is connected to the angle adjustment plate and is connected to the angle up-down fine-tuning unit, and is used for adjusting the optical axis center line of the standard lamp in the horizontal or vertical direction so that the optical axis center line of the standard lamp is perpendicular to the plane of the coordinates where the vertical installation flat plate is located.

[0024] Further, the height adjustment mechanism includes: a support frame locking nut, a support frame, an up-down adjustment shaft locking screw, a platform up-down adjustment shaft, a support rod fastening nut, and a support rod;

[0025] The lower end of the support frame is connected to one end of the first installation platform through the support frame locking nut, and its upper end is connected to the platform up-down adjustment shaft through the up-down adjustment shaft locking screw;

[0026] The lower end of the support rod is connected to the first installation platform through the support rod fastening nut, and its upper end is connected to the other end of the second installation platform;

[0027] A fixed claw is connected to the second installation platform. The fixed claw is connected to a laser rangefinder, and the measuring surface of the laser rangefinder is closely attached to the light-emitting surface of the standard lamp.

[0028] Further, the positioning adjustment mechanism further includes: an angle adjustment plate locking handle and a tripod precision gear column;

[0029] The lower end of the tripod precision gear column is connected to the tripod, and its upper end is connected to the lower side of the angle fine-tuning mechanism. The angle adjustment plate locking handle is connected to the angle fine-tuning mechanism.

[0030] In a second aspect, the present invention provides a calibration method based on the above-mentioned calibration device for a motor vehicle headlamp tester calibrator, including the following steps:

[0031] Step 1: Fix the headlamp tester calibrator to be inspected on the first installation platform through the calibrator installation screw holes. Find the position of the minimum distance value from the light-emitting surface of the standard lamp to the vertical installation flat plate surface through the laser rangefinder on the second installation platform, and make the light-emitting surface of the standard lamp of the headlamp tester calibrator face the vertical installation flat plate of the planar coordinate positioning mechanism;

[0032] Step 2: Install the standard illuminometer on the first working table where the photometric head is installed. Turn on the standard light source so that the light spot is projected onto the working surface of the standard illuminometer;

[0033] Step 3: Move the first working table in the horizontal and vertical directions to find the position with the maximum reading value of the quasi-illuminometer;

[0034] Step 4: Adjust the direction of the standard light source through the up-down fine-tuning unit and left-right fine-tuning unit so that the light spot moves on the working surface of the standard illuminometer;

[0035] Step 5: Repeat Step 3 and Step 4 to find the position with the maximum reading value of the illuminance when the light spot of the standard lamp is projected onto the vertically installed flat surface. Take the projection point of the light spot at this time as the first coordinate origin;

[0036] Step 6: Measure the distance from the light-emitting surface of the standard lamp to the working surface of the standard illuminometer with a laser rangefinder;

[0037] Step 7: Within the voltage adjustment range of the standard lamp, use the standard illuminometer to measure the illuminance at the center of the light spot and calibrate the luminous intensity value of the standard lamp;

[0038] Step 8: After the calibration of the luminous intensity value is completed, turn off the power of the standard lamp, replace the standard illuminometer with a laser power meter and install it on the first working table. Turn on the laser light source of the headlight tester calibrator and move the first working table so that the center of the laser light spot is projected onto the working surface of the laser power meter;

[0039] Step 9: Move the first working table in the horizontal and vertical directions to find the position with the maximum reading value where the laser light source in the laser power meter is projected onto the vertically installed flat surface. Take the projection point of the center of the laser light spot as the second coordinate origin;

[0040] Step 10: When testing different optical axis angles of the headlight tester calibrator in the horizontal or vertical direction, move the first working table in the horizontal or vertical direction. Find the position with the maximum reading value through the laser power meter. Determine the deviation amount from the coordinate origin at the current time according to the coordinate values of the X-axis digital display scale or Y-axis digital display scale. Finally, combined with the distance from the light-emitting surface of the standard lamp to the working surface of the standard illuminometer, complete the calibration of different optical axis angle values of the calibrator.

[0041] Further, after fixing the headlight tester calibrator to be inspected on the first installation platform, fix the laser rangefinder on the second installation platform and adjust it to be horizontal;

[0042] Adjust through the platform up-down adjustment shaft and the height adjustment of the support rod so that the center line of the measuring surface of the laser rangefinder is flush with the center line of the light-emitting surface of the standard lamp of the headlight tester calibrator, and the measuring surface of the laser rangefinder is in close contact with the light-emitting surface of the standard lamp;

[0043] Adjust the center line of the standard light axis horizontally and vertically through the left-right fine-tuning unit and the up-down fine-tuning unit respectively, so that the center line of the standard light axis is perpendicular to the plane of the coordinates where the vertical installation plate is located;

[0044] After the laser rangefinder on the second installation platform finds the position with the minimum distance value from the standard light surface to the vertical installation plate surface; loosen the locking nut of the support frame, remove the laser rangefinder, the laser rangefinder installation platform and the height adjustment mechanism, and make the light-emitting surface of the standard lamp face the vertical installation plate.

[0045] Further, the calculation method of the luminous intensity value is: I i =E i ×D0 2 ;

[0046] Where: E i is the measured illuminance value at the center of the light spot of the standard lamp under the i-th test voltage by the standard illuminometer, D0 is the distance from the light-emitting surface of the standard lamp to the working surface of the standard illuminometer; I i is the luminous intensity value under the i-th test voltage, and i is the number of test voltages;

[0047] The calculation method of the optical axis angle is: Φ j =arctan(L j / D1);

[0048] D1 = D0 + ΔD;

[0049] Where: Φ j is the j-th calibrated optical axis angle, L j is the deviation of the j-th calibrated optical axis angle from the coordinate origin, D1 is the distance from the laser emission surface of the calibrator to the working surface of the laser power meter, and ΔD is the distance from the laser emission surface of the calibrator to the standard lamp surface.

[0050] Further, before calibrating the calibrator of the headlamp tester to be inspected: first, set a spirit level on the plane coordinate positioning mechanism, adjust the working state so that its vertical installation plate is perpendicular to the horizontal plane, and the side of the X-axis linear guide rail is horizontal;

[0051] Use the laser rangefinder to find a position more than 7m in front of the vertical installation plate, set up the positioning adjustment mechanism, and adjust the first installation platform to be horizontal.

[0052] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention realizes the controllable free movement of the photometric head in the two-dimensional plane through the plane coordinate positioning mechanism, and displays the positioning coordinates in real time; then, through the measurement of the extreme value by the laser power meter or the standard illuminometer, the coordinate values of the center of the light spot on the coordinate axis are accurately positioned; combined with the fine adjustment of the positioning adjustment mechanism, the fine adjustment requirement that the center line of the optical axis is perpendicular to the coordinate plane is ensured, and the accurate measurement of the luminous intensity and the optical axis angle of the headlamp tester calibrator is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 The figure shows a schematic diagram of the calibration device of the headlamp tester calibrator;

[0054] Figure 2 The figure shows a schematic diagram of the plane coordinate positioning mechanism;

[0055] Figure 3 The figure shows a schematic diagram of the positioning adjustment mechanism;

[0056] Wherein: 1: guide rail slider, 2: fixed plate, 3: linear guide rail on the X-axis, 4: digital display scale on the Y-axis, 5: tray for scale display, 6: scale display, 7: scale frame, 8: lower linear guide rail on the X-axis, 9: triangular base, 10: base horizontal adjustable screw, 11: spirit level, 12: digital display scale on the X-axis, 13: vertical mounting plate, 14: first workbench, 15: linear guide rail on the Y-axis, 16: laser rangefinder, 17: fixed claw, 18: standard lamp, 19: second mounting platform, 20: first mounting platform, 21: angle adjustment plate, 22: angle adjustment plate locking handle, 23: precision gear column of the tripod, 24: left and right angle fine adjustment unit, 25: up and down angle fine adjustment unit, 26: support frame locking nut, 27: support frame, 28: locking screw for up and down adjustment shaft, 29: platform up and down adjustment shaft, 30: fastening nut for support rod, 31: support rod, 32: calibration device mounting screw hole, 33: plane coordinate positioning mechanism, 34: photometric head, 35: calibrator, 36: positioning adjustment mechanism, 37: tripod. DETAILED DESCRIPTION OF THE INVENTION

[0057] It should be noted that:

[0058] The technical solution of the present invention will be described in detail below through the drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. Without conflict, the technical features in the embodiments of the present invention and the embodiments can be combined with each other.

[0059] The term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0060] Embodiment 1

[0061] As Figures 1 - 3 shown in an embodiment, this embodiment provides a calibration device for a headlamp tester calibrator, including: a planar coordinate positioning mechanism 33 and a positioning adjustment mechanism 36;

[0062] The planar coordinate positioning mechanism 33 includes: a vertically installed flat plate 13, a moving mechanism, a digital display mechanism, and a photometric head 34. The vertically installed flat plate 13 is connected to the digital display mechanism and the photometric head 34 through a moving mechanism that can move horizontally or vertically;

[0063] The photometric head 34 includes: a standard illuminometer and a laser power meter. When the photometric head 34 is a standard illuminometer, it is used to read the illuminance value of the standard lamp 18 of the headlamp tester calibrator 35; when the photometric head 34 is a laser power meter, it is used to measure the deviation of the center of the light spot emitted by the laser light source of the headlamp tester calibrator 35;

[0064] The digital display mechanism is used to display the real-time coordinates of the photometric head 34;

[0065] The positioning adjustment mechanism 36 includes: a tripod 37, an angle fine-tuning mechanism, a first mounting platform 20, and a second mounting platform 19;

[0066] The tripod 37 is connected to the first mounting platform 20 through the angle fine-tuning mechanism. The standard lamp 18 is connected to the first mounting platform 20. The first mounting platform 20 is also connected to the second mounting platform 19 through a height adjustment mechanism. A laser rangefinder is connected to the second mounting platform 19. The height adjustment mechanism is used to adjust the height of the laser rangefinder for the standard lamp 18 so that the center line of the measurement surface of the laser rangefinder is close to the light-emitting surface of the standard lamp 18 and aligned with the center of the filament of the standard lamp 18. The laser rangefinder is used to measure the distance from the light-emitting surface of the standard lamp 18 to the working surface of the photometric head 34.

[0067] The planar coordinate positioning mechanism 33 further includes: a guide rail slider 1, a fixing plate 2, and a first workbench 14;

[0068] The fixing plate 2 is connected to a Y-axis digital display scale 4, a Y-axis linear guide rail 15, and the guide rail slider 1;

[0069] The moving mechanism includes: an upper X-axis linear guide rail 3, a lower X-axis linear guide rail 8, and a Y-axis linear guide rail 15;

[0070] The digital display mechanism includes: a Y-axis digital display scale 4, a scale display tray 5, a scale display 6, a scale frame 7, and an X-axis digital display scale 12;

[0071] The upper and lower linear guide rails 3 and 8 of the X-axis are installed in parallel on the upper and lower sides of the vertically installed flat plate 13. Both ends of the Y-axis linear guide rail 15 are connected to the upper and lower linear guide rails 3 and 8 of the X-axis through guide rail sliders 1 respectively. The Y-axis digital display scale 4 is connected to the Y-axis linear guide rail 15;

[0072] The scale frame 7 of the Y-axis digital display scale 4 is connected to the first workbench 14, the Y-axis linear guide rail 15, and the scale display tray 5. The scale display 6 is installed on the scale display tray 5;

[0073] The X-axis digital display scale 12 is installed on the vertically installed flat plate 13, and its scale frame 7 is connected to the lower linear guide rail 8 of the X-axis.

[0074] The plane coordinate positioning mechanism 33 further includes: a triangular base 9, a base horizontal adjustable screw 10, and a spirit level 11;

[0075] The spirit level 11 is installed on the outer frame edge of the vertically installed flat plate 13 and is used for adjusting the horizontal and vertical positions of the entire positioning mechanism;

[0076] The base horizontal adjustable screw 10 is installed on the edge of the triangular base 9 and is used for adjusting the working state of the entire positioning mechanism.

[0077] The angle fine-tuning mechanism includes: an angle adjustment plate 21, an angle left and right fine-tuning unit 24, and an angle up and down fine-tuning unit 25. The angle left and right fine-tuning unit 24 is connected to the angle adjustment plate 21 and is connected to the angle up and down fine-tuning unit 25, and is used for adjusting the optical axis center line of the standard lamp 18 in the horizontal or vertical direction so that the optical axis center line of the standard lamp 18 is perpendicular to the plane of the coordinates where the vertically installed flat plate 13 is located.

[0078] The height adjustment mechanism includes: a support frame locking nut 26, a support frame 27, an up and down adjustment shaft locking screw 28, a platform up and down adjustment shaft 29, a support rod fastening nut 30, and a support rod 31;

[0079] The lower end of the support frame 27 is connected to one end of the first installation platform 20 through the support frame locking nut 26, and its upper end is connected to the platform up and down adjustment shaft 29 through the up and down adjustment shaft locking screw 28;

[0080] The lower end of the support rod 31 is connected to the first installation platform 20 through the support rod fastening nut 30, and its upper end is connected to the other end of the second installation platform 19;

[0081] A fixing claw 17 is connected to the second mounting platform 19. The fixing claw 17 is connected to a laser rangefinder 16, and the measuring surface of the laser rangefinder 16 is in close contact with the light-emitting surface of the standard lamp 18.

[0082] The positioning and adjusting mechanism 36 further includes: an angle adjustment plate locking handle 22 and a tripod precision gear column 23;

[0083] The lower end of the tripod precision gear column 23 is connected to the tripod 37, the upper end thereof is connected to the lower side of the angle fine adjustment mechanism, and the angle adjustment plate locking handle 22 is connected to the angle fine adjustment mechanism.

[0084] Embodiment 2

[0085] Based on the same inventive concept as Embodiment 1, this embodiment provides a calibration method for the calibration device of the above-mentioned motor vehicle headlamp tester, including the following steps:

[0086] Step 1: Fix the headlamp tester calibrator 35 to be inspected on the first mounting platform 20 through the calibrator mounting screw holes 32. Find the position of the minimum distance value from the light-emitting surface of the standard lamp 18 to the surface of the vertical mounting plate 13 through the laser rangefinder 16 on the second mounting platform 19, and make the light-emitting surface of the standard lamp 18 of the headlamp tester calibrator 35 face the vertical mounting plate 13 of the planar coordinate positioning mechanism 33;

[0087] Step 2: Install the standard illuminometer on the first workbench 14 of the photometric head 34, turn on the light source of the standard lamp 18, and make its light spot project onto the working surface of the standard illuminometer;

[0088] Step 3: Move the first workbench 14 in the horizontal and vertical directions to find the position of the maximum reading value of the standard illuminometer;

[0089] Step 4: Adjust the direction of the light source of the standard lamp 18 through the up-and-down fine adjustment unit 25 and the left-and-right fine adjustment unit 24, so that the light spot moves on the working surface of the standard illuminometer;

[0090] Step 5: Repeat Step 3 and Step 4 to find the position of the maximum reading value of the illuminance when the light spot of the standard lamp 18 projects onto the surface of the vertical mounting plate 13, and use the projection point of the light spot at this time as the first coordinate origin;

[0091] Step 6: Measure the distance from the light-emitting surface of the standard lamp 18 to the working surface of the standard illuminometer through the laser rangefinder 16;

[0092] Step 7: Measure the illuminance at the center of the light spot with the standard illuminometer within the voltage adjustment range of the standard lamp 18, and calibrate the luminous intensity value of the standard lamp 18;

[0093] Step 8: After the calibration of the luminous intensity value is completed, turn off the power supply of the standard lamp 18, replace the standard illuminometer with a laser power meter and install it on the first workbench 14. Turn on the laser light source of the headlamp tester calibrator, and move the first workbench 14 so that the center of the laser spot is projected onto the working surface of the laser power meter;

[0094] Step 9: Move the first workbench 14 in the horizontal and vertical directions to find the position with the maximum reading value where the laser light source in the laser power meter is projected onto the surface of the vertically installed flat plate 13, and use the projection point of the center of the laser spot as the second coordinate origin;

[0095] Step 10: When testing different optical axis angles of the headlamp tester calibrator 35 in the horizontal or vertical direction, move the first workbench 14 in the horizontal or vertical direction, find the position with the maximum reading value through the laser power meter, determine the deviation amount from the coordinate origin at the current time according to the coordinate values of the X-axis digital display scale or the Y-axis digital display scale, and finally complete the calibration of different optical axis angle values of the calibrator in combination with the distance from the luminous surface of the standard lamp 18 to the working surface of the standard illuminometer.

[0096] After fixing the headlamp tester calibrator 35 to be inspected on the first installation platform 20, fix the laser rangefinder 16 on the second installation platform 19 and adjust it to be horizontal;

[0097] Adjust the height through the platform up and down adjustment shaft 29 and the support rod 31 so that the center line of the measuring surface of the laser rangefinder 16 is flush with the center line of the luminous surface of the standard lamp 18 of the headlamp tester calibrator 35, and the measuring surface of the laser rangefinder 16 is in close contact with the luminous surface of the standard lamp 18;

[0098] Adjust the horizontal and vertical directions of the optical axis center line of the standard lamp 18 respectively through the left and right fine adjustment unit 24 and the up and down fine adjustment unit 25 so that the optical axis center line of the standard lamp 18 is perpendicular to the plane of the coordinates where the vertically installed flat plate 13 is located;

[0099] After the laser rangefinder 16 on the second installation platform 19 finds the position with the minimum distance value from the surface of the standard lamp 18 to the surface of the vertically installed flat plate 13; loosen the support frame locking nut 26, remove the laser rangefinder 16, the laser rangefinder installation platform 19 and the height adjustment mechanism, and make the luminous surface of the standard lamp 18 face the vertically installed flat plate 13.

[0100] The calculation method of the luminous intensity value is: I i =E i ×D0 2 ;

[0101] Where: E i is the measured illuminance value at the center of the light spot of the standard lamp at the i-th test voltage by the standard illuminometer, and D0 is the distance from the luminous surface of the standard lamp to the working surface of the standard illuminometer; I iis the luminous intensity value at the i-th test voltage, and i is the number of test voltages;

[0102] The calculation method of the optical axis angle is: Φ j = arctanL j / D1;

[0103] D1 = D0 + ΔD;

[0104] Where: Φ j is the j-th calibrated optical axis angle, L j is the deviation of the center of the laser spot of the j-th calibrated optical axis angle from the origin of the coordinate, D1 is the distance from the laser emission surface of the calibrator to the working surface of the laser power meter, and ΔD is the distance from the laser emission surface of the calibrator to the standard lamp surface.

[0105] Before calibrating the calibrator 35 of the headlamp tester to be inspected: First, set a spirit level 11 on the planar coordinate positioning mechanism 33, adjust the working state so that its vertical installation plate 13 is perpendicular to the horizontal plane, and the side of the X-axis linear guide is horizontal;

[0106] Use a laser rangefinder 16 to find a position more than 7m in front of the vertical installation plate 13, set up the positioning and adjustment mechanism 36, and adjust the first installation platform to be horizontal.

[0107] The present invention realizes the controllable free movement of the photometric head in the two-dimensional plane through the planar coordinate positioning mechanism, and real-time displays the positioning coordinates; then, through the measurement of the extreme value by a laser power meter or a standard illuminance meter, accurately locates the coordinate values of the center of the light spot on the coordinate axis; combined with the fine adjustment of the positioning and adjustment mechanism, it ensures the fine adjustment requirements of the optical axis center line perpendicular to the coordinate plane, and realizes the accurate measurement of the luminous intensity and optical axis angle of the calibrator of the motor vehicle headlamp tester.

[0108] The above describes the embodiments of the present invention in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the present invention and the claims. These all belong to the protection scope of the present invention.

Claims

1. A calibration device for a headlamp tester calibrator, characterized in that, Comprising: A planar coordinate positioning mechanism (33) and a positioning and adjusting mechanism (36); The planar coordinate positioning mechanism (33) includes: a vertically installed flat plate (13), a moving mechanism, a digital display mechanism, and a photometric head (34). The vertically installed flat plate (13) is connected to the digital display mechanism and the photometric head (34) through a moving mechanism that can move horizontally or vertically; The photometric head (34) includes: a standard illuminometer and a laser power meter. When the photometric head (34) is a standard illuminometer, it is used to read the illuminance value of the standard lamp (18) of the headlamp tester calibrator (35); when the photometric head (34) is a laser power meter, it is used to measure the deviation of the center of the light spot emitted by the laser light source of the headlamp tester calibrator (35); The digital display mechanism is used to display the real-time coordinates of the photometric head (34); The positioning and adjusting mechanism (36) includes: a tripod (37), an angle fine-tuning mechanism, a first mounting platform (20), and a second mounting platform (19); The tripod (37) is connected to the first mounting platform (20) through the angle fine-tuning mechanism. The standard lamp (18) is connected to the first mounting platform (20). The first mounting platform (20) is also connected to the second mounting platform (19) through a height adjusting mechanism. A laser rangefinder is connected to the second mounting platform (19). The height adjusting mechanism is used to adjust the height of the laser rangefinder for the standard lamp (18) so that the center line of the measurement surface of the laser rangefinder is close to the light-emitting surface of the standard lamp (18) and aligned with the center of the filament of the standard lamp (18). The laser rangefinder is used to measure the distance from the light-emitting surface of the standard lamp (18) to the working surface of the photometric head (34); 2. The headlamp tester calibrator calibration device according to claim 1, wherein The planar coordinate positioning mechanism (33) further includes: a guide rail slider (1) and a first workbench (14); The moving mechanism includes: an X-axis linear guide rail (3), an X-axis lower linear guide rail (8), and a Y-axis linear guide rail (15); The digital display mechanism includes: a Y-axis digital display scale (4), a scale display tray (5), a scale display (6), a scale frame (7), and an X-axis digital display scale (12); The X-axis upper linear guide rail (3) and the X-axis lower linear guide rail (8) are installed in parallel on the upper and lower sides of the vertically installed flat plate (13). The two ends of the Y-axis linear guide rail (15) are respectively connected to the X-axis upper linear guide rail (3) and the X-axis lower linear guide rail (8) through the guide rail slider (1). The Y-axis digital display scale (4) is connected to the Y-axis linear guide rail (15); The scale frame (7) of the Y-axis digital display scale (4) is connected to the first workbench (14), the Y-axis linear guide rail (15), and the scale display tray (5). The scale display (6) is installed on the scale display tray (5); The X-axis digital display scale (12) is installed on the vertically installed flat plate (13), and its scale frame (7) is connected to the X-axis lower linear guide rail (8); 3. The calibration device for a motor vehicle headlamp tester according to claim 2, characterized in that, The planar coordinate positioning mechanism (33) further includes: a triangular base (9), a base horizontal adjustable screw (10), and a spirit level (11); The spirit level (11) is installed on the outer frame edge of the vertically installed flat plate (13) and is used for adjusting the horizontal and vertical positions of the entire positioning mechanism; The horizontal adjustable screw (10) of the base is installed at the edge of the triangular base (9) and is used for adjusting the working state of the entire positioning mechanism.

4. The calibration device for a motor vehicle headlamp tester according to claim 1, characterized in that, The angle fine-tuning mechanism includes: an angle adjustment plate (21), a left-right angle fine-tuning unit (24), and an up-down angle fine-tuning unit (25). The left-right angle fine-tuning unit (24) is connected to the angle adjustment plate (21) and is connected to the up-down angle fine-tuning unit (25), and is used to adjust the optical axis center line of the standard lamp (18) in the horizontal or vertical direction, so that the optical axis center line of the standard lamp (18) is perpendicular to the plane of the coordinate where the vertical installation plate (13) is located.

5. The calibration device for a motor vehicle headlamp tester calibrator according to claim 1, characterized in that: The height adjustment mechanism includes: a support frame locking nut (26), a support frame (27), an up-down adjustment shaft locking screw (28), a platform up-down adjustment shaft (29), a support rod fastening nut (30), and a support rod (31); The lower end of the support frame (27) is connected to one end of the first installation platform (20) through the support frame locking nut (26), and its upper end is connected to the platform up-down adjustment shaft (29) through the up-down adjustment shaft locking screw (28); The lower end of the support rod (31) is connected to the first installation platform (20) through the support rod fastening nut (30), and its upper end is connected to the other end of the second installation platform (19); A fixed claw (17) is connected to the second installation platform (19). The fixed claw (17) is connected to the laser rangefinder (16), and the measuring surface of the laser rangefinder (16) is closely attached to the light-emitting surface of the standard lamp (18).

6. The calibration device for a motor vehicle headlamp tester according to claim 1, characterized in that, The positioning adjustment mechanism (36) further includes: an angle adjustment plate locking handle (22) and a tripod precision gear column (23); The lower end of the tripod precision gear column (23) is connected to the tripod (37), and its upper end is connected to the lower side of the angle fine-tuning mechanism. The angle adjustment plate locking handle (22) is connected to the angle fine-tuning mechanism.

7. A calibration method for a calibration device of a motor vehicle headlamp tester according to any one of claims 1 to 6, characterized in that, It includes the following steps: Step 1: Fix the headlight tester calibrator (35) to be inspected on the first installation platform (20) through the calibrator installation screw hole (32). Find the position of the minimum distance value from the light-emitting surface of the standard lamp (18) to the surface of the vertical installation plate (13) through the laser rangefinder (16) on the second installation platform (19), and make the light-emitting surface of the standard lamp (18) of the headlight tester calibrator (35) face the vertical installation plate (13) of the plane coordinate positioning mechanism (33); Step 2: Install the standard illuminometer on the first workbench (14) of the photometric head (34), and turn on the light source of the standard lamp (18) so that its light spot is projected onto the working surface of the standard illuminometer; Step 3: Move the first workbench (14) in the horizontal and vertical directions to find the position with the maximum reading value of the standard illuminometer; Step 4: Adjust the light source direction of the standard lamp (18) through the up-down fine-tuning unit (25) and the left-right fine-tuning unit (24) so that the light spot moves on the working surface of the standard illuminometer; Step 5: Repeat Step 3 and Step 4 to find the position with the maximum reading value of the illuminance when the light spot of the standard lamp (18) is projected onto the surface of the vertical installation plate (13), and use the projection point of the light spot at this time as the first coordinate origin; Step 6: Measure the distance from the light-emitting surface of the standard lamp (18) to the working surface of the standard illuminometer with a laser rangefinder (16). Step 7: Within the voltage adjustment range of the standard lamp (18), measure the illuminance at the center of the light spot with a standard illuminometer and calibrate the luminous intensity value of the standard lamp (18). Step 8: After the calibration of the luminous intensity value is completed, turn off the power supply of the standard lamp (18), replace the standard illuminometer with a laser power meter and install it on the first workbench (14), turn on the laser light source of the headlamp tester calibrator, and move the first workbench (14) so that the center of the laser light spot is projected onto the working surface of the laser power meter. Step 9: Move the first workbench (14) in the horizontal and vertical directions to find the position with the maximum reading value where the laser light source in the laser power meter is projected onto the surface of the vertically installed flat plate (13), and use the projection point of the center of the laser light spot as the second coordinate origin. Step 10: When testing different optical axis angles of the headlamp tester calibrator in the horizontal or vertical direction, move the first workbench (14) in the horizontal or vertical direction, find the position with the maximum reading value through the laser power meter, determine the deviation amount from the current coordinate origin based on the coordinate values of the X-axis digital display scale or the Y-axis digital display scale, and finally, in combination with the distance from the light-emitting surface of the standard lamp (18) to the working surface of the standard illuminometer, complete the calibration of different optical axis angle values of the calibrator.

8. The calibration method of the motor vehicle headlamp detector calibrator according to claim 7, characterized in that, After fixing the headlamp tester calibrator to be inspected on the first installation platform (20), fix the laser rangefinder (16) on the second installation platform (19) and adjust it to be horizontal. Adjust the height through the platform up-and-down adjustment shaft (29) and the support rod (31) so that the center line of the measuring surface of the laser rangefinder (16) is flush with the center line of the light-emitting surface of the standard lamp (18) of the headlamp tester calibrator, and the measuring surface of the laser rangefinder (16) is in close contact with the light-emitting surface of the standard lamp (18). Adjust the horizontal and vertical directions of the optical axis center line of the standard lamp (18) respectively through the left-right fine adjustment unit (24) and the up-down fine adjustment unit (25) so that the optical axis center line of the standard lamp (18) is perpendicular to the plane of the coordinates where the vertically installed flat plate (13) is located. After the laser rangefinder (16) on the second installation platform (19) finds the position with the minimum distance value from the surface of the standard lamp (18) to the surface of the vertically installed flat plate (13); loosen the locking nut (26) of the support frame, remove the laser rangefinder (16), the laser rangefinder installation platform (19) and the height adjustment mechanism, and make the light-emitting surface of the standard lamp (18) face the vertically installed flat plate (13).

9. The calibration method of a motor vehicle headlamp tester calibrator according to claim 7, characterized in that The calculation method of the luminous intensity value is: I i =E i ×D0 2 ; Among them: E i is the measured illuminance value at the center of the light spot of the standard lamp under the i-th test voltage by the standard illuminometer, and D0 is the distance from the light-emitting surface of the standard lamp to the working surface of the standard illuminometer; I i is the luminous intensity value under the i-th test voltage, and i is the number of test voltages; The calculation method of the optical axis angle is: Φ j = arctan(L j / D1); D1 = D0 + ΔD; Where: Φ j is the j-th calibrated optical axis angle, L j is the deviation of the center of the laser spot of the j-th calibrated optical axis angle from the origin of coordinates. D1 is the distance from the laser emission surface of the calibrator to the working surface of the laser power meter, and ΔD is the distance from the laser emission surface of the calibrator to the standard lamp surface.

10. The calibration method of the headlamp tester calibrator for motor vehicles according to claim 7, wherein Before calibrating the headlamp tester calibrator to be inspected: first, set a spirit level (11) on the planar coordinate positioning mechanism (33), adjust the working state so that its vertically installed flat plate (13) is perpendicular to the horizontal plane, and the side of the X-axis linear guide is horizontal. Find a position more than 7 m in front of the vertically installed flat plate (13) with a laser rangefinder (16), set up the positioning and adjustment mechanism (36), and adjust the first installation platform to be horizontal.

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