Lamp light distribution performance measuring system

Abstract

The utility model discloses a lamp light distribution measuring system which comprises a two-dimensional rotary table, an optical measuring device and a data transceiving control unit. The two-dimensional rotary table is of a double-U-shaped structure and comprises a U-shaped base, a U-shaped rotating mechanism, a sample table, a translation mechanism and a driving motor, the U-shaped base is connected with the U-shaped rotating mechanism, the sample table is connected with the U-shaped rotating mechanism through the translation mechanism, and the translation mechanism is used for moving the sample table to enable the luminosity center of a tested lamp to coincide with the rotating center of the two-dimensional rotary table; and the sample table rotates in two degrees of freedom of orientation and pitching. The optical measuring device is arranged in front of the measured lamp and is used for receiving light beams from the measured lamp. And the data transceiving control unit is respectively in communication connection with the optical measuring device and the driving motor. The problems that spatial light distribution of a novel lamp in the prior art is difficult to measure, and measurement is inaccurate due to installation position errors of the lamp are effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of photoelectric testing, in particular to a lamp light distribution performance measurement system. Background Art

[0002] Photometric performance (i.e. spatial distribution of light) is the most basic and important technical and quality indicator for traffic and automotive lighting products, which directly affects the safety of vehicles and people. Domestic and foreign relevant standards have made specific restrictions on the photometric performance of traffic and automotive lighting or formulated mandatory standard test items, and made corresponding provisions for relevant test equipment and test conditions. Similarly, there are corresponding photometric performance requirements for traffic lighting.

[0003] There are four main methods for testing the light distribution performance of lamps: lamp rotation test method, full-screen camera test method, manual point-by-point test method, and zone-by-zone test method. Each of these four methods has its own advantages and relative costs. At present, the laboratory measurement of the spatial light distribution of lamps is mainly achieved through the distribution photometer. Under dark room conditions, the lamp to be tested is installed on the distribution photometer, and the photometer probe measures the illuminance at a certain distance, and the luminous intensity is obtained through the inverse square law of distance, that is, I = E·d 2 , where E and I are the illuminance and luminous intensity in the same direction respectively, and d is the straight-line distance between the measuring point and the lamp under test. In the goniophotometer, the lamp under test and the photometric probe rotate relative to each other to change the angle at which the photometric probe receives light, thereby obtaining the spatial light intensity distribution of the lamp under test, and the measurement accuracy is relatively high. However, the CIE 121 standard stipulates that this measurement method is carried out under the condition that the photometric center of the lamp coincides with the effective rotation center of the goniophotometer, and has very high requirements for the installation and alignment of the lamp. If there is a deviation in the installation position of the lamp, it will have a significant impact on the measurement results. In addition, most of the existing goniophotometer detection equipment is designed based on the structure of traditional lamps, which cannot meet the testing requirements of new lamps (such as large-size centrifugal lamps), or it needs to occupy a large space. Therefore, there is an urgent need for a photometric performance measurement system suitable for new lamps, which can coincide the photometric center of the lamp with the rotation center of the turntable to meet the needs of photometric performance testing. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a lamp light distribution performance measurement system, aiming to solve the problems of difficulty in measuring the spatial light distribution of new lamps in the prior art (such as large-sized centrifugal lamps) and inaccurate measurement caused by errors in the installation position of the lamps.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] The utility model discloses a lamp light distribution measurement system, including a two-dimensional turntable, an optical measuring device and a data transceiver control unit. The two-dimensional turntable is a double U-shaped structure, including a U-shaped base, a U-shaped rotating mechanism, a sample stage for placing the lamp to be measured, a translation mechanism and a driving motor. The U-shaped base is connected to the U-shaped rotating mechanism, and the sample stage is connected to the U-shaped rotating mechanism through the translation mechanism. The translation mechanism is used to move the sample stage so that the photometric center of the lamp to be measured coincides with the rotation center of the two-dimensional turntable. The sample stage realizes rotation of two degrees of freedom in azimuth and pitch under the drive of the driving motor. The optical measuring device is arranged in front of the lamp to be measured, and the optical measuring device is used to receive a light beam from the lamp to be measured, and then measure and obtain the light distribution information of the lamp to be measured. The data transceiver control unit is respectively connected to the optical measuring device and the driving motor for communication.

[0007] As a technical solution, the two-dimensional turntable includes an azimuth axis system structure and a pitch axis system structure. The sample stage is connected to the U-shaped rotation mechanism through the azimuth axis system structure; the pitch axis system structure is arranged at the outer end of the side frame of the U-shaped rotation mechanism, and the two ends of the U-shaped base are connected to the U-shaped rotation mechanism through the pitch axis system structure; the azimuth axis system structure and the pitch axis system structure are respectively connected to the drive motor for communication.

[0008] As a technical solution, it also includes an imaging measurement device that is communicatively connected to the data transceiver control unit, the imaging measurement device is aimed at the lamp to be measured and its measurement field of view can cover the light-emitting surface of the lamp to be measured, and its setting position satisfies that the incident light of the lamp entering the optical measurement device will not be blocked. Preferably, the imaging measurement device can be moved to be suitable for measuring lamps with different light-emitting surface sizes.

[0009] As a technical solution, the imaging measurement device is an imaging luminance meter or a camera or a camera head, which can be used to measure the brightness distribution of the light-emitting surface of the lamp under test, and further analyze parameters such as the maximum brightness of the light-emitting surface, the size of the light-emitting surface and / or the brightness uniformity, so as to obtain more comprehensive light distribution information of the lamp under test.

[0010] As a technical solution, it also includes a mobile base, and the two-dimensional turntable is arranged on the mobile base, which is used to realize the free transfer of the entire measurement system and facilitate the measurement of the light distribution performance of the lamp. Preferably, it also includes a base leveling mechanism, and multiple base leveling mechanisms are distributed around the mobile base, and the two-dimensional turntable is connected through the base leveling mechanism to adjust the base level and ensure the accuracy and reliability of the light distribution performance measurement of the lamp.

[0011] As a technical solution, the optical measuring device is aligned with the rotation center of the two-dimensional turntable when working, which is conducive to the measurement of the spatial light distribution parameters of the lamp.

[0012] As a technical solution, it also includes a sighting screen and an imaging module. The sighting screen is arranged in front of the two-dimensional turntable, and the light beam emitted by the lamp under test is projected on the sighting screen. The imaging module is arranged on the two-dimensional turntable and is aimed at the sighting screen. Specifically, the imaging module has color and light intensity measurement functions, and can be an imaging color brightness meter or an imaging brightness meter with spectrum measurement or a color industrial camera. The imaging module is used to measure the light distribution information projected by the lamp under test onto the sighting screen.

[0013] Furthermore, a plurality of movable or detachable optical detectors are installed on or near the aiming screen surface, and the light receiving surface of the optical detectors is parallel to the aiming screen. The optical detectors can calibrate the imaging module to ensure the accuracy of the measurement results.

[0014] As a technical solution, it also includes a calibration light source, which is arranged on the two-dimensional turntable, and the calibration light source can calibrate the measurement value of the optical measuring device or the measurement value of the imaging module. Further, the calibration light source can be movably arranged on the two-dimensional turntable. Specifically, the optical measuring device is used to measure the calibration light source of known luminous intensity to obtain the measurement value, and the calibration coefficient is obtained by conversion to calibrate the optical measuring device. After that, the calibration light source can be removed, the lamp to be measured is installed, and the light distribution performance test of the lamp is performed. In other words, the calibration light source is arranged near the imaging module, and the calibration light source can also calibrate the measurement value of the imaging module. The imaging module is used to measure the calibration light source of known luminous intensity to obtain the measurement value, and the calibration coefficient is obtained by conversion to calibrate the imaging module.

[0015] In some optional embodiments, the calibration light source is a uniformly emitting light source, and the light output of the calibration light source is adjustable. The light output of the calibration light source is adjusted to match the spectrum of the lamp under test, thereby achieving accurate calibration according to the luminous characteristics of different lamps under test, and eliminating the calibration error caused by the difference between the calibration light source and the lamp under test. In addition, using a uniformly emitting light source during calibration is conducive to improving the accuracy of calibration and the measurement accuracy.

[0016] As a technical solution, two or more imaging measurement devices are arranged at different positions, the imaging measurement devices are aimed at the lamp to be measured, and the brightness distribution of the lamp to be measured is measured by the imaging measurement devices. Preferably, the imaging measurement device can be moved to be suitable for measuring lamps with different light-emitting surface sizes.

[0017] As a technical solution, a temperature sensor is also included, and the temperature sensor is used to detect the temperature of the optical measuring device. During the measurement process, the optical measuring device may drift as the ambient temperature changes. The temperature sensor can be used to dynamically measure the ambient temperature so as to correct the measurement result of the optical measuring device and ensure the measurement accuracy.

[0018] As a technical solution, it also includes a movable platform that can be raised and lowered. The optical measuring device is arranged on the movable platform. The optical measuring device can be raised and lowered to facilitate alignment with the lamp to be measured or with the rotation center of the two-dimensional turntable.

[0019] As a technical solution, it also includes an XYZ three-dimensional mobile platform, and the optical measuring device is arranged on the mobile platform to facilitate alignment with the lamp to be measured or with the rotation center of the two-dimensional turntable.

[0020] As a technical solution, the two-dimensional turntable also includes a safety scanning unit, which is arranged on both sides of the two-dimensional turntable to ensure measurement safety. Specifically, the safety scanning unit is a laser safety scanner, which is respectively installed on the left and right sides of the U-shaped base of the two-dimensional turntable. If an intrusion is detected during the test, the turntable automatically slows down to ensure the safety of the operator.

[0021] Beneficial effects of the utility model: The utility model provides a lamp light distribution performance measurement system, the designed double U-shaped two-dimensional turntable has a large bearing capacity, and uses a translation mechanism to move the lamp under test, so that the photometric center of the lamp under test coincides with the rotation center of the two-dimensional turntable, so as to be suitable for the light distribution performance measurement of new lamps (such as large-sized centrifugal lamps). In addition, through the setting of the imaging measurement device, the rotation angle of the lamp can be calibrated to further ensure the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attached Figure 1 A schematic diagram of the structure of a lamp light distribution measurement system provided in the first embodiment of the utility model;

[0023] Attached Figure 2 A schematic diagram of the structure of a lamp light distribution measurement system provided in the second embodiment of the utility model;

[0024] Attached Figure 3 and attached Figure 4 A schematic diagram of the structure of a lamp light distribution measurement system provided in Embodiment 3 of the present utility model;

[0025] In the figure, 1 is a two-dimensional turntable, 2 is an aiming screen, 3 is a lamp to be measured, 4 is an optical measuring device, 5 is an imaging measuring device, 6 is a translation mechanism, 7 is a sample stage, 8 is an optical detector, 9 is an imaging module, 10 is a U-shaped rotation mechanism, 11 is an azimuth axis system structure, 12 is a pitch axis system structure, 13 is a U-shaped base, and 14 is a calibration light source. DETAILED DESCRIPTION

[0026] Embodiment 1:

[0027] This embodiment discloses a lighting distribution measurement system for a lamp. Figure 1 and Figure 2 As shown, it includes a two-dimensional turntable 1, an optical measuring device 4, an imaging measuring device 5 and a data receiving and transmitting control unit. The two-dimensional turntable is a double U-shaped structure, including a U-shaped base 13, a U-shaped rotating mechanism 10, a sample stage 7 for placing the lamp 3 to be measured, a translation mechanism 6, an azimuth axis system structure 11, a pitch axis system structure 12, a calibration light source 14 and a driving motor. The U-shaped base 13 is connected to the U-shaped rotating mechanism 10, and the sample stage 7 is connected to the U-shaped rotating mechanism 10 through the translation mechanism 6. The translation mechanism 6 moves the sample stage 7 so that the photometric center of the lamp 3 to be measured is aligned with the two-dimensional turntable 1. The rotation centers coincide with each other; the translation mechanism 6 is connected to the U-shaped rotation mechanism 10 through the azimuth axis structure 11; the pitch axis structure 12 is arranged at the outer end of the side frame of the U-shaped rotation mechanism 10, and the two ends of the U-shaped base 13 are connected to the U-shaped rotation mechanism 10 through the pitch axis structure 12; the azimuth axis structure 11 and the pitch axis structure 12 are respectively connected to the drive motor for communication, and the sample stage 7 realizes the rotation of the two degrees of freedom of azimuth and pitch under the drive of the drive motor. The optical measurement device 4 is arranged in front of the lamp 3 to be tested, and the optical measurement device 4 is used to receive the light beam from the lamp 3 to be tested, and then measure the light distribution information of the lamp 3 to be tested. The imaging measurement device 5 is aimed at the lamp 3 to be tested, and its measurement field of view can cover the light-emitting surface of the lamp 3 to be tested. The brightness distribution of the light-emitting surface of the lamp 3 to be tested can be measured by the imaging measurement device 5. The calibration light source 14 is arranged on the two-dimensional turntable 1, and the calibration light source 14 can calibrate the measurement value of the optical measurement device 4. Specifically, the optical measuring device 4 is used to measure the calibration light source 14 of known luminous intensity to obtain a measurement value, and the calibration coefficient is obtained by conversion to calibrate the optical measuring device 4, and then the lamp to be tested is installed to perform a light distribution performance test of the lamp. The data transceiver control unit is respectively connected to the optical measuring device 4, the imaging measuring device 5, and the drive motor for communication.

[0028] The imaging measurement device 5 described in this embodiment may be an imaging luminance meter or a camera or a video camera.

[0029] Preferably, it also includes a mobile base, and the two-dimensional turntable 1 is arranged on the mobile base, which is used to realize the free transfer of the entire measurement system and facilitate the measurement of the light distribution performance of the lamp. Furthermore, it also includes a base leveling mechanism, and multiple base leveling mechanisms are distributed around the mobile base, and the two-dimensional turntable 1 is connected through the base leveling mechanism to adjust the base level to ensure the accuracy and reliability of the light distribution performance measurement of the lamp.

[0030] Preferably, the optical measuring device 4 is aligned with the rotation center of the two-dimensional turntable 1 when in operation, which is beneficial to the measurement of the spatial light distribution parameters of the lamp.

[0031] Preferably, a movable platform that can be raised and lowered is further included, and the optical measuring device 4 is arranged on the movable platform. The optical measuring device 4 can be raised and lowered so as to be aligned with the lamp 3 to be measured or with the rotation center of the two-dimensional turntable 1 .

[0032] Preferably, an XYZ three-dimensional mobile platform is further included, and the optical measuring device 4 is arranged on the mobile platform to facilitate alignment with the lamp 3 to be measured or with the rotation center of the two-dimensional turntable 1 .

[0033] Embodiment 2:

[0034] This embodiment discloses a lighting distribution measurement system for a lamp. Figure 3 and Figure 4As shown, it includes a two-dimensional turntable 1, an optical measuring device 4, an imaging measuring device 5, an aiming screen 2 and a data receiving and sending control unit. The two-dimensional turntable is a double U-shaped structure, including a U-shaped base 13, a U-shaped rotating mechanism 10, a sample stage 7 for placing the lamp 3 to be measured, a translation mechanism 6, an azimuth axis system structure 11, a pitch axis system structure 12, a calibration light source 14, an imaging module 9 and a driving motor. The U-shaped base 13 is connected to the U-shaped rotating mechanism 10, and the sample stage 7 is connected to the U-shaped rotating mechanism 10 through the translation mechanism 6. The translation mechanism 6 moves the sample stage 7 so that the photometric center of the lamp 3 to be measured is aligned with the two-dimensional turntable. The rotation centers of the stage 1 coincide with each other; the translation mechanism 6 is connected to the U-shaped rotation mechanism 10 through the azimuth axis structure 11; the pitch axis structure 12 is arranged at the outer end of the side frame of the U-shaped rotation mechanism 10, and the two ends of the U-shaped base 13 are connected to the U-shaped rotation mechanism 10 through the pitch axis structure 12; the azimuth axis structure 11 and the pitch axis structure 12 are respectively connected to the drive motor for communication, and the sample stage 7 realizes the rotation of the two degrees of freedom of azimuth and pitch under the drive of the drive motor. The optical measuring device 4 is arranged in front of the lamp 3 to be tested, and the optical measuring device 4 is used to receive the light beam from the lamp 3 to be tested, and then measure the light distribution information of the lamp 3 to be tested. The imaging measuring device 5 is arranged near the optical measuring device 4, and the imaging measuring device 5 is aimed at the lamp 3 to be tested and its measurement field can cover the light-emitting surface of the lamp 3 to be tested. The brightness distribution of the light-emitting surface of the lamp 3 to be tested can be measured by the imaging measuring device 5. The calibration light source 14 is arranged on the two-dimensional turntable 1, and the calibration light source 14 can calibrate the measurement value of the optical measuring device 4 or the imaging module 9. The aiming screen 2 is arranged in front of the two-dimensional turntable 1, and the light beam emitted by the lamp 3 to be measured is projected on the aiming screen 2. The imaging module 9 is arranged on the two-dimensional turntable 1, close to the calibration light source 14, and the imaging module 9 rotates the aiming screen 2. Specifically, the imaging module 9 has a color measurement function, and can be an imaging color luminance meter or an imaging luminance meter with spectrum measurement or a color industrial camera. The imaging module 9 is used to measure the light distribution information projected by the lamp 3 to the aiming screen 2. The optical measuring device 4 can be used to measure the calibration light source 14 of known luminous intensity to obtain the measurement value, and the calibration coefficient is obtained by conversion, and the optical measuring device 4 or the imaging module 9 is calibrated, and then the lamp to be measured is installed to test the light distribution performance of the lamp. The data transceiver control unit is respectively connected to the optical measuring device 4, the imaging measuring device 5, the imaging module 9, and the drive motor.

[0035] Preferably, a plurality of movable or detachable optical detectors 8 are installed on or near the surface of the aiming screen 2, and the light receiving surface of the optical detectors 8 is parallel to the aiming screen 2. The optical detectors 8 can calibrate the imaging module 9 to ensure the accuracy of the measurement result.

[0036] Preferably, the calibration light source 14 is a uniformly emitting light source, and the light output of the calibration light source 14 is adjustable. The light output of the calibration light source 14 is adjusted to match the spectrum of the lamp 3 under test, thereby achieving accurate calibration according to the luminous characteristics of different lamps under test, and eliminating the calibration error caused by the difference between the calibration light source and the lamp under test. In addition, using a uniformly emitting light source during calibration is conducive to improving the accuracy of calibration and the measurement accuracy.

[0037] Preferably, the two-dimensional turntable 1 further includes a safety scanning unit, which is arranged on both sides of the two-dimensional turntable 1 to ensure measurement safety. Specifically, the safety scanning unit is a laser safety scanner, which is respectively installed on the left and right sides of the two-dimensional turntable U-shaped base 13. If an intrusion is detected during the test, the two-dimensional turntable automatically slows down to ensure the safety of the operator.

[0038] The specific implementation methods of the present invention are described above in conjunction with the accompanying drawings, but those skilled in the art should understand that the above embodiments are only for illustration and are not intended to limit the scope of the present invention. Those skilled in the art should understand that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A lamp light distribution performance measurement system, characterized in that: The invention comprises a two-dimensional turntable (1), an optical measuring device (4) and a data transceiver control unit. The two-dimensional turntable (1) is a double U-shaped structure, comprising a U-shaped base (13), a U-shaped rotating mechanism (10), a sample stage (7) for placing a lamp (3) to be measured, a translation mechanism (6) and a drive motor. The U-shaped base (13) is connected to the U-shaped rotating mechanism (10). The sample stage (7) is connected to the U-shaped rotating mechanism (10) via the translation mechanism (6). The translation mechanism (6) is used to move the sample stage (7) so that the photometric center of the lamp (3) to be measured coincides with the rotation center of the two-dimensional turntable (1). The sample stage (7) is driven by the drive motor to realize rotation of two degrees of freedom, azimuth and pitch. The optical measuring device (4) is arranged in front of the lamp (3) to be measured and receives a light beam from the lamp (3) to be measured. The data transceiver control unit is respectively connected to the optical measuring device (4) and the drive motor for communication.

2. A lamp light distribution performance measurement system according to claim 1, characterized in that: The two-dimensional turntable (1) further comprises an azimuth axis structure (11) and a pitch axis structure (12); the translation mechanism (6) is connected to the U-shaped rotation mechanism (10) via the azimuth axis structure (11); the pitch axis structure (12) is arranged at the outer end of the side frame of the U-shaped rotation mechanism (10); the two ends of the U-shaped base (13) are connected to the U-shaped rotation mechanism (10) via the pitch axis structure (12); the azimuth axis structure (11) and the pitch axis structure (12) are respectively connected to the drive motor in communication.

3. A lamp light distribution performance measurement system according to claim 1 or 2, characterized in that: It also includes an imaging measurement device (5) that is communicatively connected to the data transceiver control unit, wherein the imaging measurement device (5) is aimed at the lamp (3) to be measured and its measurement field of view can cover the light-emitting surface of the lamp (3) to be measured.

4. A lamp light distribution performance measurement system according to claim 3, characterized in that: The imaging measurement device (5) is an imaging luminance meter or a camera or a video camera, and the imaging measurement device (5) is used to measure the luminance distribution of the light-emitting surface of the lamp (3) under test.

5. A lamp light distribution performance measurement system according to claim 1 or 2, characterized in that: It also comprises a mobile base, on which the two-dimensional turntable (1) is arranged.

6. A lamp light distribution performance measurement system according to claim 1, characterized in that: It also comprises an aiming screen (2) and an imaging module (9), wherein the aiming screen is arranged in front of the two-dimensional turntable (1), and the light beam emitted by the lamp (3) to be tested is projected onto the aiming screen (2); and the imaging module is arranged on the two-dimensional turntable (1) and is aligned with the aiming screen (2).

7. The lamp light distribution performance measurement system according to claim 1, characterized in that: It also comprises a calibration light source (14), wherein the calibration light source (14) is arranged on the two-dimensional turntable (1).

8. The lamp light distribution performance measurement system according to claim 6, characterized in that: A plurality of movable or detachable optical detectors (8) are installed on the surface of or near the aiming screen (2), and the light receiving surfaces of the optical detectors (8) are parallel to the aiming screen (2).

9. A lamp light distribution performance measurement system according to claim 1 or 2, characterized in that: It comprises two or more imaging measurement devices (5), wherein the imaging measurement devices (5) are arranged at different positions and are aimed at the lamp (3) to be measured.

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