CN113686547A - Automobile LED (light-emitting diode) automobile lamp chromaticity detection system and detection method - Google Patents
Automobile LED (light-emitting diode) automobile lamp chromaticity detection system and detection method Download PDFInfo
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- CN113686547A CN113686547A CN202010427436.4A CN202010427436A CN113686547A CN 113686547 A CN113686547 A CN 113686547A CN 202010427436 A CN202010427436 A CN 202010427436A CN 113686547 A CN113686547 A CN 113686547A
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Abstract
The detection occurs in a process section after an LED vehicle lamp in a vehicle lamp assembly is assembled in place and before a light distribution lens is closed; through the cooperation of a detection feeding unit, an optical signal acquisition and conversion unit and a micro control unit which are arranged in a detection system; and completing light ray separation based on the spectral radiation, photoelectric conversion, acquisition and comparison operation of corresponding signals, and forming the on-line chromaticity detection method of the LED car lamp. According to the automobile LED automobile lamp chromaticity detection system and method, the improvement of the automobile lamp assembly and detection overall process procedure is realized through the arranged detection system, the overall process assembly time is shortened, the overall assembly operation is efficient, meanwhile, the problems of inaccuracy of manual detection and high cost of image processing based on color camera shooting are solved, and higher cost performance output is realized.
Description
Technical Field
The invention belongs to the field of automobile illumination, and particularly relates to an automobile LED (light-emitting diode) automobile lamp chromaticity detection system and a detection method.
Background
LED vehicle lamps have unique issues that must be considered when compared to conventional light sources, and chromaticity performance is one of the important aspects. Due to the luminous characteristics and temperature of the LED, the LED car lamp is easy to have the phenomena of color drift and uneven space color, the appearances of the whole car are affected by the phenomena, and even more, potential safety hazards are brought. The inconsistent color of the light source of the automobile lamp in all directions of the space can also cause the driver to feel uncomfortable during the driving process.
At present, the chromaticity of most of LED car lamps is manually detected by a production line on line, and unqualified products manually detected are tested and confirmed by quality assurance personnel. The method is greatly influenced by personal abilities of workers, the chromaticity boundary failure (such as yellowish white LED) of the LED car lamp is difficult to judge, and eyes of the workers are damaged by aiming the sight at the LED light source of the car lamp for a long time.
The other type of on-line detection of the chromaticity of the LED car lamp adopts a color camera to collect images, and then an image controller analyzes the color distribution of red, green and blue in the collected images to determine the chromaticity of the LED car lamp. The method requires a color camera to have higher acquisition precision, requires an image controller to have higher analysis capability, is expensive in cost, and is easily influenced by ambient light in the process of acquiring the LED car light image.
The application numbers are: 201310082594.0 discloses a method and apparatus for testing a light emitting device. The method comprises the following steps: providing an integrating sphere comprising an inlet and a first outlet; arranging a light-emitting device close to an inlet of the integrating sphere; providing a current source for driving the light emitting device to form an image in a driving state, providing an image receiving device for receiving the image of the light emitting device, wherein the image receiving device is connected with the first outlet of the integrating sphere, and determining the light emitting intensity of the light emitting device according to the image.
The application numbers are: 201310357599.X, the invention application discloses a system and a method for detecting chromaticity, wherein the system comprises a microprocessor, an input module, a display module, an alarm prompt module, a data access module, a power supply processing module, an LED driving module and a chromaticity acquisition module, the input module, the display module, the alarm prompt module, the data access module, the power supply processing module, the LED driving module and the chromaticity acquisition module are connected with the periphery of the microprocessor, the chromaticity acquisition module comprises a sealing mechanism and a photoelectric conversion element at the output end of the sealing mechanism, a scheme for acquiring light is selected according to the light emitting characteristic of an object to be detected by placing the object to be detected to the front end of the sealing mechanism, the chromaticity acquisition module acquires the light parameter of the acquired light and converts the light parameter into an electric parameter, and the microprocessor calculates the chromaticity indicating value according to the converted linear electric parameter.
The application numbers are: 200780025828.0, discloses "an apparatus and method for characterizing a light source". The apparatus includes a detector system that generates data representing at least spectroradiometric data for at least a portion of the light emitted by the light source. The apparatus also includes a manipulation stage configured to control a relative position between the detector system and the light source. Furthermore, the apparatus comprises a control and processing system configured to control the operation of the detector system, the operation of the manipulation stage, and to record data and relative positions of the detector system associated therewith; the control and processing system is further configured to process the collected data in order to determine photometric and/or colouristic properties of the light emitted by the light source.
Disclosure of Invention
In order to solve the problems, the invention provides a system and a method for detecting the chromaticity of an automobile LED lamp, and the technical scheme is as follows:
the utility model provides a car LED car light colourity detecting system which characterized in that:
the detection is carried out in a process section after an LED vehicle lamp in the vehicle lamp assembly is assembled in place and before a light distribution lens is closed;
the detection system comprises a detection feeding unit, an optical signal acquisition and conversion unit and a micro control unit;
the detection feeding unit feeds the detection point to the place according to the control instruction of the micro control unit and the optical signal acquisition and conversion unit;
the optical signal acquisition and conversion unit is matched with an internal photoelectric conversion end according to an internal spectral radiation spectral light path to finish the acquisition and photoelectric conversion of optical signals of corresponding detection points;
the micro control unit receives the electric signal which is subjected to photoelectric conversion by the photoelectric conversion end, and performs logic operation and judgment output on the electric signal;
the online chromaticity detection of the LED car lamp is completed through the detection system.
The invention discloses an automobile LED (light-emitting diode) automobile lamp chromaticity detection system, which is characterized in that:
the detection feeding unit is provided with a car light assembly feeding mechanism and an optical signal acquisition and conversion unit feeding mechanism;
under the instruction of the micro control unit, the feeding mechanism of the car lamp assembly is matched with the feeding mechanism of the optical signal acquisition and conversion unit, and the feeding in place for detection is formed in a darkroom environment.
The invention discloses an automobile LED (light-emitting diode) automobile lamp chromaticity detection system, which is characterized in that:
the spectral radiation spectrum light path and the photoelectric conversion end arranged in the optical signal acquisition and conversion unit are arranged as follows:
the spectral radiation spectrum light path is composed of a light entrance slit, a coupling optical fiber, a diffuse scattering light-transmitting window, a first reflector, a spectral grating and a second reflector which are arranged in sequence,
the photoelectric conversion end is arranged on the focal plane of the second reflector.
The invention discloses an automobile LED (light-emitting diode) automobile lamp chromaticity detection system, which is characterized in that:
a lower computer and an upper computer are arranged on the micro control unit;
the lower computer is used for receiving the electric signal of the photoelectric conversion end and establishing information communication with the upper computer;
the upper computer is used for sending control information to the lower computer, receiving data information of the lower computer, and finishing judgment, comparison and output according to the received data.
The invention discloses an automobile LED (light-emitting diode) automobile lamp chromaticity detection system, which is characterized in that:
a human-computer interaction operation end is also arranged on the micro control unit,
and a human-computer interaction data processing end is also arranged in the upper computer.
A detection method of an automobile LED car lamp chromaticity detection system is characterized in that:
a detection feeding unit, an optical signal acquisition and conversion unit and a micro control unit are arranged in the detection system;
the detection method comprises the following steps:
s1: under the environment of a darkroom required by detection, the detection feeding unit finishes feeding the optical signal acquisition and conversion unit to the corresponding detection point in place according to the control instruction of the micro control unit;
s2: the optical signal acquisition and conversion unit realizes light separation of different wavelengths on incident light through an internal light splitting radiation optical path;
s3: the optical signal acquisition and conversion unit realizes photoelectric conversion of the separated light rays with different wavelengths through an internal photoelectric conversion end;
s4: the micro control unit collects the electric signal output by the photoelectric conversion end; and comparing the received data value with the standard value recorded into the database, and then performing interpretation and output.
The detection method of the automobile LED lamp chromaticity detection system is characterized by comprising the following steps:
the detection feeding unit is provided with a car light assembly feeding mechanism and an optical signal acquisition and conversion unit feeding mechanism;
step S1 specifically includes: under the instruction of the micro control unit, the feeding mechanism of the car lamp assembly is matched with the feeding mechanism of the optical signal acquisition and conversion unit, and the feeding in place for detection is formed in a darkroom environment.
The detection method of the automobile LED lamp chromaticity detection system is characterized by comprising the following steps:
in step S2, the split optical radiation path is implemented by a slit for transmitting light, an optical fiber coupling, a light-transmitting window for realizing diffuse scattering, a first mirror for changing the optical path, a split grating for realizing splitting, and a second mirror for changing the optical path, which are sequentially disposed;
in step S3, the photoelectric conversion end is disposed at the focal plane of the second mirror.
The detection method of the automobile LED lamp chromaticity detection system is characterized by comprising the following steps:
in step S3, photoelectric conversion and time-series transmission of spectral lines at different positions are completed by the arranged area array CCD.
The detection method of the automobile LED lamp chromaticity detection system is characterized by comprising the following steps:
a lower computer and an upper computer are arranged on the micro control unit;
the lower computer is used for receiving the electric signal of the photoelectric conversion end and establishing information communication with the upper computer;
the upper computer is used for sending control information to the lower computer, receiving data information of the lower computer, and finishing judgment, comparison and output according to the received data.
The detection method of the automobile LED lamp chromaticity detection system is characterized by comprising the following steps:
a human-computer interaction operation end is also arranged on the micro control unit,
and a human-computer interaction data processing end is also arranged in the upper computer.
According to the system and the method for detecting the chromaticity of the automobile LED automobile lamp, firstly, the improvement of the integral process procedures of automobile lamp assembly and detection is realized through the arranged detection system, the integral process assembly time is shortened, and the integral assembly operation is efficient; detecting a process section after an LED vehicle lamp arranged in the vehicle lamp assembly is assembled in place and before a light distribution lens is closed; secondly, the light separation is realized by utilizing the light splitting radiation technology, the problem of inaccuracy caused by traditional manual automobile LED chromaticity detection can be solved, the substitution of the expensive method such as 'acquiring images by adopting a color camera and determining the chromaticity of an LED automobile lamp by analyzing the color distribution of red, green and blue in the acquired images by an image controller' can be well formed, and the higher output of the cost performance is realized. Wherein, an upper computer and a lower computer are arranged in the micro control unit, and a human-computer interaction operation response can be established through the arrangement of the upper computer.
Drawings
FIG. 1 is a schematic diagram of a detection system according to the present invention;
FIG. 2 is a schematic diagram of the detection method of the present invention;
fig. 3 is a schematic diagram of a spectral path structure of the present invention.
Detailed Description
The following describes a system and a method for detecting chromaticity of an automotive LED lamp according to the present invention with reference to the drawings and the embodiments.
A chromaticity detection system for an automotive LED lamp as shown in figure 1,
the detection is carried out in a process section after an LED vehicle lamp in the vehicle lamp assembly is assembled in place and before a light distribution lens is closed;
the detection system comprises a detection feeding unit, an optical signal acquisition and conversion unit and a micro control unit;
the detection feeding unit feeds the detection point to the place according to the control instruction of the micro control unit and the optical signal acquisition and conversion unit;
the optical signal acquisition and conversion unit is matched with an internal photoelectric conversion end according to an internal spectral radiation spectral light path to finish the acquisition and photoelectric conversion of optical signals of corresponding detection points;
the micro control unit receives the electric signal which is subjected to photoelectric conversion by the photoelectric conversion end, and performs logic operation and judgment output on the electric signal;
the online chromaticity detection of the LED car lamp is completed through the detection system.
Wherein the content of the first and second substances,
the detection feeding unit is provided with a car light assembly feeding mechanism and an optical signal acquisition and conversion unit feeding mechanism;
under the instruction of the micro control unit, the feeding mechanism of the car lamp assembly is matched with the feeding mechanism of the optical signal acquisition and conversion unit, and the feeding in place for detection is formed in a darkroom environment.
Wherein the content of the first and second substances,
the spectral radiation spectrum light path and the photoelectric conversion end arranged in the optical signal acquisition and conversion unit are arranged as follows:
the spectral radiation spectrum light path is composed of a light entrance slit, a coupling fiber, a diffuse scattering light-transmitting window, a first reflector, a spectral grating and a second reflector which are arranged in sequence, as shown in figure 3,
the photoelectric conversion end is arranged on the focal plane of the second reflector.
Wherein the content of the first and second substances,
a lower computer and an upper computer are arranged on the micro control unit;
the lower computer is used for receiving the electric signal of the photoelectric conversion end and establishing information communication with the upper computer;
the upper computer is used for sending control information to the lower computer, receiving data information of the lower computer, and finishing judgment, comparison and output according to the received data.
Wherein the content of the first and second substances,
a human-computer interaction operation end is also arranged on the micro control unit,
and a human-computer interaction data processing end is also arranged in the upper computer.
A detection method of an automobile LED car light chromaticity detection system is characterized in that a detection feeding unit, an optical signal acquisition and conversion unit and a micro control unit are arranged in the detection system;
as shown in fig. 2, the detection method according to the above includes the steps of:
s1: under the environment of a darkroom required by detection, the detection feeding unit finishes feeding the optical signal acquisition and conversion unit to the corresponding detection point in place according to the control instruction of the micro control unit;
s2: the optical signal acquisition and conversion unit realizes light separation of different wavelengths on incident light through an internal light splitting radiation optical path;
s3: the optical signal acquisition and conversion unit realizes photoelectric conversion of the separated light rays with different wavelengths through an internal photoelectric conversion end;
s4: the micro control unit collects the electric signal output by the photoelectric conversion end; and comparing the received data value with the standard value recorded into the database, and then performing interpretation and output.
Wherein the content of the first and second substances,
the detection feeding unit is provided with a car light assembly feeding mechanism and an optical signal acquisition and conversion unit feeding mechanism;
step S1 specifically includes: under the instruction of the micro control unit, the feeding mechanism of the car lamp assembly is matched with the feeding mechanism of the optical signal acquisition and conversion unit, and the feeding in place for detection is formed in a darkroom environment.
Wherein the content of the first and second substances,
in step S2, the split optical radiation path is implemented by a slit for transmitting light, an optical fiber coupling, a light-transmitting window for realizing diffuse scattering, a first mirror for changing the optical path, a split grating for realizing splitting, and a second mirror for changing the optical path, which are sequentially disposed; as shown in figure 3 of the drawings,
in step S3, the photoelectric conversion end is disposed at the focal plane of the second mirror.
Wherein the content of the first and second substances,
in step S3, photoelectric conversion and time-series transmission of spectral lines at different positions are completed by the arranged area array CCD.
Wherein the content of the first and second substances,
a lower computer and an upper computer are arranged on the micro control unit;
the lower computer is used for receiving the electric signal of the photoelectric conversion end and establishing information communication with the upper computer;
the upper computer is used for sending control information to the lower computer, receiving data information of the lower computer, and finishing judgment, comparison and output according to the received data.
Wherein the content of the first and second substances,
a human-computer interaction operation end is also arranged on the micro control unit,
and a human-computer interaction data processing end is also arranged in the upper computer.
Examples
The online detection system for the chromaticity of the automobile LED lamp comprises an operation screen, an operation box, an image display screen, a safety protection cover, a darkroom cover, a mechanical arm, a clamp sliding table cylinder, a detection clamp and an LED chromaticity detector.
Wherein the content of the first and second substances,
the operation screen, the operation box and the image display screen form the man-machine interaction end;
the safety protection cover and the darkroom cover are used for forming a darkroom environment for detection;
the manipulator is the optical signal acquisition and conversion unit feeding mechanism;
the clamp sliding table cylinder and the detection clamp form the vehicle lamp assembly feeding mechanism;
the LED color detector is set according to a spectral light path arranged in the optical signal acquisition and conversion unit;
wherein the content of the first and second substances,
the operation screen is used for operating the equipment and setting detection parameters to enable the equipment to normally operate;
the operation box is used for starting the equipment, resetting the equipment to alarm and emergently stopping the equipment;
the image display screen is used for displaying a current real-time running picture and detection parameters;
the safety protection gas hood has a lifting function, the LED car lamp to be tested can be assembled and disassembled by opening the safety protection gas hood, and the safety protection gas hood is closed to form a closed environment so as to protect equipment and personnel safety;
the darkroom cover is made of fixed light-tight material, so that no external light source interferes the detection result in the detection process;
the manipulator is used for clamping the optical fiber and driving the LED chromaticity detector detection probe to measure the LED car lamp;
the fixture sliding table cylinder has the functions of conveying the lamp to be detected to the detection area and moving the lamp out of the detection area after the test is finished.
Such as the spectral radiation spectral path shown in fig. 3 (i.e., an LED chromaticity detector). Incident light is emitted to the first reflector 1 through the slit after being subjected to optical fiber coupling and diffuse scattering of the light-transmitting window, light rays reflected in a collimating way by the first reflector 1 are emitted to the grating for light splitting, the light rays are emitted to the second reflector 2 after being split, finally the light rays after being split and reflected are emitted to the photosensitive surface of the photoelectric detector, the photoelectric detector is arranged on the focal plane of the focusing reflector, and the size of the photoelectric detector is larger than or equal to the size of an imaging light spot. The photodetector may be formed by an area array CCD or a photomultiplier.
The photoelectric detector converts the collected optical signals into electric signals, the micro control unit compares the electric signal values with the set parameter range of the device by reading the electric signals, if the electric signals are in the set parameter range, the electric signals are qualified, otherwise, the electric signals are unqualified.
The method specifically comprises the following steps:
opening the safety protection cover and the darkroom cover, and fixing the automobile LED lamp on the detection clamp;
the lower computer of the micro control unit receives control data information of the upper computer and forms a control instruction according to the control data information, and the manipulator and the detection clamp complete the feeding of the lamp and the LED chromaticity detector in place after receiving the control instruction;
and closing the safety protection cover and the darkroom cover, and driving the detection probes of the LED chromaticity detector to sequentially pass through the measurement points by the manipulator.
The measured photometric signal is transmitted to a subsequent processing link of the spectral radiation spectrum optical path structure through an optical fiber for optical signal processing after being incident through an incident port of an LED colorimetric detector clamped by a manipulator;
the separated light split by the grating reaches a focal plane of the second reflector, is received by an area array CCD arranged on the focal plane and is transmitted to a lower computer of the micro control unit after photoelectric conversion is completed, the lower computer transmits the acquired data to an upper computer, and the upper computer compares the acquired chromaticity information with a preset parameter range and displays a qualified or unqualified mark on a display screen.
According to the system and the method for detecting the chromaticity of the automobile LED automobile lamp, firstly, the improvement of the integral process procedures of automobile lamp assembly and detection is realized through the arranged detection system, the integral process assembly time is shortened, and the integral assembly operation is efficient; detecting a process section after an LED vehicle lamp arranged in the vehicle lamp assembly is assembled in place and before a light distribution lens is closed; secondly, the light separation is realized by utilizing the light splitting radiation technology, the problem of inaccuracy caused by traditional manual automobile LED chromaticity detection can be solved, the substitution of the expensive method such as 'acquiring images by adopting a color camera and determining the chromaticity of an LED automobile lamp by analyzing the color distribution of red, green and blue in the acquired images by an image controller' can be well formed, and the higher output of the cost performance is realized. Wherein, an upper computer and a lower computer are arranged in the micro control unit, and a human-computer interaction operation response can be established through the arrangement of the upper computer.
Claims (11)
1. The utility model provides a car LED car light colourity detecting system which characterized in that:
the detection is carried out in a process section after an LED vehicle lamp in the vehicle lamp assembly is assembled in place and before a light distribution lens is closed;
the detection system comprises a detection feeding unit, an optical signal acquisition and conversion unit and a micro control unit;
the detection feeding unit feeds the detection point to the place according to the control instruction of the micro control unit and the optical signal acquisition and conversion unit;
the optical signal acquisition and conversion unit is matched with an internal photoelectric conversion end according to an internal spectral radiation spectral light path to finish the acquisition and photoelectric conversion of optical signals of corresponding detection points;
the micro control unit receives the electric signal which is subjected to photoelectric conversion by the photoelectric conversion end, and performs logic operation and judgment output on the electric signal;
the online chromaticity detection of the LED car lamp is completed through the detection system.
2. The system for detecting the chromaticity of the LED vehicle lamp of the vehicle as claimed in claim 1, wherein:
the detection feeding unit is provided with a car light assembly feeding mechanism and an optical signal acquisition and conversion unit feeding mechanism;
under the instruction of the micro control unit, the feeding mechanism of the car lamp assembly is matched with the feeding mechanism of the optical signal acquisition and conversion unit, and the feeding in place for detection is formed in a darkroom environment.
3. The system for detecting the chromaticity of the LED vehicle lamp of the vehicle as claimed in claim 1, wherein:
the spectral radiation spectrum light path and the photoelectric conversion end arranged in the optical signal acquisition and conversion unit are arranged as follows:
the spectral radiation spectrum light path is composed of a light entrance slit, a coupling optical fiber, a diffuse scattering light-transmitting window, a first reflector, a spectral grating and a second reflector which are arranged in sequence,
the photoelectric conversion end is arranged on the focal plane of the second reflector.
4. The system of claim 3, wherein the chromaticity of the LED lamp of the vehicle is detected by:
a lower computer and an upper computer are arranged on the micro control unit;
the lower computer is used for receiving the electric signal of the photoelectric conversion end and establishing information communication with the upper computer;
the upper computer is used for sending control information to the lower computer, receiving data information of the lower computer, and finishing judgment, comparison and output according to the received data.
5. The system for detecting the chromaticity of the LED vehicle lamp of the vehicle as claimed in claim 4, wherein:
a human-computer interaction operation end is also arranged on the micro control unit,
and a human-computer interaction data processing end is also arranged in the upper computer.
6. A detection method of an automobile LED car lamp chromaticity detection system is characterized in that:
a detection feeding unit, an optical signal acquisition and conversion unit and a micro control unit are arranged in the detection system;
the detection method comprises the following steps:
s1: under the environment of a darkroom required by detection, the detection feeding unit finishes feeding the optical signal acquisition and conversion unit to the corresponding detection point in place according to the control instruction of the micro control unit;
s2: the optical signal acquisition and conversion unit realizes light separation of different wavelengths on incident light through an internal light splitting radiation optical path;
s3: the optical signal acquisition and conversion unit realizes photoelectric conversion of the separated light rays with different wavelengths through an internal photoelectric conversion end;
s4: the micro control unit collects the electric signal output by the photoelectric conversion end; and comparing the received data value with the standard value recorded into the database, and then performing interpretation and output.
7. The detection method of the chromaticity detection system of the automobile LED lamp according to claim 6, characterized in that:
the detection feeding unit is provided with a car light assembly feeding mechanism and an optical signal acquisition and conversion unit feeding mechanism;
step S1 specifically includes: under the instruction of the micro control unit, the feeding mechanism of the car lamp assembly is matched with the feeding mechanism of the optical signal acquisition and conversion unit, and the feeding in place for detection is formed in a darkroom environment.
8. The detection method of the chromaticity detection system of the automobile LED lamp according to claim 6, characterized in that:
in step S2, the split optical radiation path is implemented by a slit for transmitting light, an optical fiber coupling, a light-transmitting window for realizing diffuse scattering, a first mirror for changing the optical path, a split grating for realizing splitting, and a second mirror for changing the optical path, which are sequentially disposed;
in step S3, the photoelectric conversion end is disposed at the focal plane of the second mirror.
9. The detection method of the chromaticity detection system of the automobile LED lamp according to claim 6, characterized in that:
in step S3, photoelectric conversion and time-series transmission of spectral lines at different positions are completed by the arranged area array CCD.
10. The detection method of the chromaticity detection system of the automobile LED lamp according to claim 6, characterized in that:
a lower computer and an upper computer are arranged on the micro control unit;
the lower computer is used for receiving the electric signal of the photoelectric conversion end and establishing information communication with the upper computer;
the upper computer is used for sending control information to the lower computer, receiving data information of the lower computer, and finishing judgment, comparison and output according to the received data.
11. The detection method of the chromaticity detection system of the automotive LED lamp according to claim 10, wherein:
a human-computer interaction operation end is also arranged on the micro control unit,
and a human-computer interaction data processing end is also arranged in the upper computer.
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| CN202010427436.4A CN113686547A (en) | 2020-05-19 | 2020-05-19 | Automobile LED (light-emitting diode) automobile lamp chromaticity detection system and detection method |
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| 郑咏梅, 张铁强, 申铉国: "CCD汽车车灯色度测试及其光谱分析方法的研究", 光学技术, no. 05, 20 September 2000 (2000-09-20), pages 440 - 441 * |
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