Test method implemented based on test system and test system thereof

Abstract

The invention relates to a test method based on a test system and a test system thereof, the test system comprises a test chamber, a test platform, an optical measuring instrument and a control center, the test chamber provides a test space for a lamp, the test platform is arranged in the test chamber, the optical measuring instrument is movably arranged on the test platform, and the control center is connected with the optical measuring instrument. The control center is arranged outside the test chamber, the control center is in communication connection with the lamp, the control center controls the optical measuring instrument to move to a proper position through the test platform so as to obtain optical data when an LED lamp bead of the lamp is lightened, and the optical measuring instrument feeds back the optical data to the control center. And the detection, verification and correction efficiency of lamp products can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of lamp lighting, and in particular to a test method based on a test system and a test system thereof. Background Art

[0002] Spectral measurement technology plays a vital role in many fields, especially in the field of lighting. The light efficiency properties of various LED lamps need to obtain optical data, optical effect qualification detection, optical effect verification and calibration before leaving the factory. In order to improve production efficiency and intelligent requirements, the technology of spectral measurement methods is developing towards higher sensitivity, higher resolution and lower cost. The traditional manual measurement method can no longer meet the modern high-efficiency output, and is easily affected by external stray light during manual measurement. Therefore, it is necessary to develop a high-efficiency and high-precision test system. Summary of the invention

[0003] The present invention is to solve one of the above technical problems and provide a test method and a test system based on a test system, which have high efficiency and high precision measurement effects.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A test method based on a test system, the test system comprising a test chamber, a test platform, an optical measuring instrument and a control center, the test chamber providing a closed test space for a lamp to reduce interference from other irrelevant light, the test platform being arranged in the test chamber, the optical measuring instrument being movably arranged on the test platform, specifically, the test platform being a guide rail, the optical measuring instrument sliding on the guide rail, the control center being arranged outside the test chamber, the control center being communicatively connected with the lamp, the control center controlling the optical measuring instrument to move to an appropriate position through the test platform to obtain optical data when an LED lamp bead of the lamp is lit, and the optical measuring instrument feeding back the optical data to the control center; The test method comprises the following steps: Step S1, placing the lamp to be tested at a predetermined position in the test room; Step S2, optical data acquisition, the control center sends instructions to the lamp, and at the same time, the control center controls the optical measuring instrument to move to the test position through the driving motor, and the optical measuring instrument sends the tested optical data to the control center; Step S3, data processing, the control center calculates the obtained optical data through an algorithm to obtain required characteristic data, and the control center sends the required characteristic data to the bottom chip of the lamp; Step S4, the target light effect instruction is input, and the bottom chip controls the lamp to output the actual light effect consistent with the target light effect according to the target light effect instruction and the characteristic data; Step S5, verification of light effect consistency, the control center controls the optical measuring instrument to collect optical data of actual light effect again and sends it to the control center, the control center processes the standard optical data of target light effect and the test optical data of actual light effect, and determines whether the data processing result is within the preset error range, if so, the lamp is determined to be qualified, otherwise, steps S2 to S5 are repeated or it fails.

[0005] It is further defined that, in step S2, the optical data acquisition steps are as follows: Step S21, the control center controls the optical measuring instrument to return to an initial position, where the initial position of the optical measuring instrument is directly opposite to the first LED lamp bead at the head end of the lamp; Step S22, the control center controls the first LED lamp bead of the lamp to light up, and the other LED lamp beads are turned off, and the optical measuring instrument sends the optical data of the first LED lamp bead tested to the control center; In step S23, the control center controls the second LED lamp bead of the lamp to light up, and the other LED lamp beads are off. The control center controls the optical measuring instrument to move to the distance between the first LED lamp bead and the second LED lamp bead through the driving motor. The optical measuring instrument sends the optical data of the second LED lamp bead to the control center, and so on, until the optical data of all LED lamp beads are measured and obtained.

[0006] It is further defined as follows: in step S5, the number of times to repeat steps S2 to S5 is set, and if the judgment condition is met within the set number of times, it is judged as qualified, otherwise, it is judged as unqualified.

[0007] It is further defined that the control center is communicatively connected with the lamp via a DMX communication module.

[0008] It is further defined that the optical data includes the maximum illumination value of monochromatic light of n LED lamp beads, wherein each LED lamp bead includes monochromatic light of different colors; in step S3, the data processing steps are as follows: Step S31, setting a standard illumination value of a monochromatic light as Ex0, and the maximum illumination values ​​of the monochromatic light actually measured from the first LED lamp bead to the nth LED lamp bead are Ex1, Ex2...Exn respectively; Step S32, according to the formula Dim=255*Ex0 / Exn, the gray value ratio coefficient between each LED lamp bead is obtained, and the gray value ratio coefficient is sent to the bottom chip as feature data.

[0009] It is further defined as follows: in step S5, the standard optical data is a standard illumination value, and the test optical data is a measured illumination value, and a comparison is made to determine whether the standard illumination value and the measured illumination value are within a preset error range.

[0010] It is further defined that the optical data includes spectrum data of n LED lamp beads, and in step S3, the control center processes the spectrum data to obtain required color feature data and sends it to the underlying chip.

[0011] It is further defined that in step S5, the standard optical data is the input standard chromaticity coordinates, the test optical data is the measured chromaticity coordinates, and it is calculated and determined whether the distance between the standard chromaticity coordinates and the measured chromaticity coordinates is within a preset error range.

[0012] A test system for implementing the above test method, the test system includes a test room, a test platform, an optical measuring instrument and a control center, the test room provides a test space for the lamp, the test platform is arranged in the test room, the optical measuring instrument is movably arranged on the test platform, the control center is arranged outside the test room, the control center is connected to the lamp for communication, the control center controls the optical measuring instrument to move to a suitable position through the test platform to obtain optical data when the LED lamp beads of the lamp are lit, and the optical measuring instrument feeds back the optical data to the control center.

[0013] After adopting the above technical solution, the invention has at least the following beneficial effects: 1. The invention can automatically complete the calibration of the brightness consistency of lamps by combining the system and the test method, greatly reducing the brightness difference caused by the LED lamp beads and the LED lamp bead drivers, and ensuring that each LED lamp produces a very close brightness output under the same grayscale setting. In addition, this method can also ensure that the LED lamp beads of lamps produced in different batches of the same series of lamps can meet the brightness consistency output under the same grayscale setting.

[0014] 2. This method can also be used to quickly detect whether the actual light effect is consistent with the target light effect, so as to determine whether the light effect quality of the lamp is qualified. If it is unqualified, the light effect error can be further corrected, which can greatly improve the efficiency of lamp product testing, verification and correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the principle block diagram of the test system; Figure 2 is a flow chart of the test method; Figure 3 It is one of the comparison diagrams of the color coordinate data in the second embodiment; Figure 4This is the second comparison chart of the color coordinate data in the second embodiment; Figure 5 This is the third comparison chart of the color coordinate data in the second embodiment; Figure 6 This is the fourth comparison chart of the color coordinate data in the second embodiment. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments in the present application and the features described in the embodiments may be combined with each other. The present application is further described in detail below in conjunction with the drawings and specific embodiments.

[0017] As attached Figure 1 As shown, a test method based on a test system is shown, the test system includes a test room 2, a test platform 3, an optical measuring instrument 4 and a control center 1 (computer, notebook, etc.), the test room 2 provides a test space for the lamp 4, the test platform 3 is arranged in the test room 2, the optical measuring instrument 4 is movably arranged on the test platform 3, the control center 1 is arranged outside the test room 2, the control center 1 is connected to the lamp 4 through a DMX communication module, the control center 1 controls the optical measuring instrument 4 to move to a suitable position through the test platform 3 to obtain optical data when the LED lamp beads of the lamp 4 are lit, and the optical measuring instrument 4 feeds back the optical data to the control center 1; the test system can realize automatic detection, verification and correction of the lamp 4 product, which greatly improves the inspection efficiency of the quality of the lamp 4.

[0018] As attached Figure 2 As shown, the test method can measure the brightness, chromaticity coordinates, spectrum and other optical items of the lamp 4.

[0019] Embodiment 1: A test method for implementing brightness consistency calibration of a lamp 4 based on the test system comprises the following steps: Step S1, placing the lamp 4 to be tested in a predetermined position in the test chamber 2, when the optical measuring instrument 4 returns to its initial position, the center of the light spot of the first LED lamp bead at the head end of the lamp 4 is exactly aligned with the test point of the optical measuring instrument 4.

[0020] Step S2, optical data acquisition, the control center 1 sends a command to the lamp 4, and at the same time, the control center 1 controls the optical measuring instrument 4 to move to the test position through the driving motor, and the optical measuring instrument 4 sends the tested optical data to the control center 1; Step S21, the control center 1 controls the optical measuring instrument 4 to restore the initial position, where the initial position of the optical measuring instrument 4 is directly opposite to the first LED lamp bead at the head end of the lamp 4; Step S22, the control center 1 controls the first LED lamp bead of the lamp 4 to light up, and the other LED lamp beads are turned off, and the optical measuring instrument 4 sends the optical data of the first LED lamp bead tested to the control center 1; In step S23, the control center 1 controls the second LED lamp bead of the lamp 4 to light up, and the other LED lamp beads are off. The control center 1 controls the optical measuring instrument 4 to move to the distance between the first LED lamp bead and the second LED lamp bead by driving the motor. The optical measuring instrument 4 sends the optical data of the second LED lamp bead to the control center 1, and so on, until the optical data of all LED lamp beads are measured and obtained, and the optical data includes the maximum illumination value of the monochromatic light of n LED lamp beads, wherein each LED lamp bead includes monochromatic light of different colors (such as red, green, blue, cyan, amber, etc.). According to this step, each LED lamp bead can be lit and measured one by one to obtain the optical data of each LED lamp bead, and the optical data includes illumination data, spectrum data, etc.

[0021] Step S3, data processing, the control center 1 calculates the obtained optical data through an algorithm to obtain required characteristic data, and the control center 1 sends the required characteristic data to the bottom chip of the lamp 4; Step S31, setting a standard illumination value of a monochromatic light as Ex0, and the maximum illumination values ​​of the monochromatic light actually measured from the first LED lamp bead to the nth LED lamp bead are Ex1, Ex2...Exn respectively; Step S32, according to the formula Dim=255*Ex0 / Exn, the gray value ratio coefficient between each LED lamp bead is obtained, and the gray value ratio coefficient is sent to the bottom chip as feature data.

[0022] For example, the standard illumination of red light is set as Ex0=21000lux in the control center 1. According to step S2, the maximum illumination measured when each LED lamp bead lights up red light is Ex1=21500lux, Ex2=21800lux, Ex3=21200lux, and Ex4=22000lux. The control center 1 calculates the grayscale value ratio coefficient between the four LED lamp beads according to the formula Dim=255*Rx0 / Exn, and the control center 1 sends the grayscale value ratio coefficient data to the underlying chip, which adjusts the illumination consistency light effect output of each LED lamp bead according to the grayscale value ratio coefficient.

[0023] Step S4, the target light effect instruction is input, and the bottom chip controls the lamp 4 to output the actual light effect consistent with the target light effect according to the target light effect instruction and the characteristic data.

[0024] Step S5, verification of light effect consistency, the control center 1 controls the optical measuring instrument 4 to collect optical data of actual light effect again and send it to the control center 1, the control center 1 compares the standard optical data of the target light effect (standard illuminance value) and the test optical data of the actual light effect (measured illuminance value), and determines whether the data processing result is within the preset error range (±1%), if so, the lamp 4 is determined to be qualified, otherwise, steps S2 to S5 are repeated, and the number of repetitions is set. If the judgment conditions are met within 3 repeated cycles, the lamp 43 is determined to be a qualified product; if the judgment conditions are still not met after 3 repeated cycles, the lamp 43 is determined to be a defective product and needs to be manually processed.

[0025] During the cycle, we can manually adjust the gray value ratio coefficient of each LED lamp bead externally, and then repeat steps S2 to S4 to re-judge, so as to speed up the process of light effect correction.

[0026] This method can automatically complete the brightness consistency calibration, greatly reducing the brightness difference caused by LED lamp beads and LED lamp bead drivers, ensuring that each LED lamp 4 produces very close brightness output under the same grayscale setting. In addition, this method can also ensure that the LED lamp beads of the lamps 4 of the same series of lamps 4 produced in different batches can meet the brightness consistency output under the same grayscale setting.

[0027] Embodiment 2: A test method for verifying the chromaticity coordinates of a lamp based on a test system includes the following steps: Step S1, placing the lamp 4 to be tested in a predetermined position in the test chamber 2, when the optical measuring instrument 4 returns to its initial position, the center of the light spot of the first LED lamp bead at the head end of the lamp 4 is exactly aligned with the test point of the optical measuring instrument 4.

[0028] Step S2, optical data acquisition, the control center 1 sends a command to the lamp 4, and at the same time, the control center 1 controls the optical measuring instrument 4 to move to the test position through the driving motor, and the optical measuring instrument 4 sends the tested optical data to the control center 1; Step S21, the control center 1 controls the optical measuring instrument 4 to restore the initial position, where the initial position of the optical measuring instrument 4 is directly opposite to the first LED lamp bead at the head end of the lamp 4; Step S22, the control center 1 controls the first LED lamp bead of the lamp 4 to light up, and the other LED lamp beads are turned off, and the optical measuring instrument 4 sends the optical data of the first LED lamp bead tested to the control center 1; In step S23, the control center 1 controls the second LED lamp bead of the lamp 4 to light up, and the other LED lamp beads are off. The control center 1 controls the optical measuring instrument 4 to move to the distance between the first LED lamp bead and the second LED lamp bead by driving the motor. The optical measuring instrument 4 sends the optical data of the second LED lamp bead to the control center 1, and so on, until the optical data of all LED lamp beads are measured and obtained, and the optical data includes the maximum illumination value of the monochromatic light of n LED lamp beads, wherein each LED lamp bead includes monochromatic light of different colors (such as red, green, blue, cyan, amber, etc.).

[0029] Step S3, data processing, the control center 1 calculates the obtained optical data (i.e., spectral data) through an algorithm to obtain the required characteristic data, and the control center 1 sends the required characteristic data to the underlying chip of the lamp 4; wherein the characteristic data includes intensity characteristic data, color characteristic data, etc., and the required characteristic data in this embodiment is color characteristic data, therefore, the control center 1 sends the required characteristic data (i.e., color characteristic data) to the underlying chip of the lamp 4 through the DMX communication module.

[0030] This step can simplify the design of the underlying chip calculation and reduce the storage space. The absolute spectral data containing all optical features (information) is first processed by an algorithm in the control center 1 (computer) to extract the feature data containing only color features (information). After that, only the color feature data is sent to the underlying chip. This not only achieves the desired functional requirements, but also greatly simplifies the calculation and storage capacity of the underlying chip.

[0031] Step S4, the target light effect instruction is input, the bottom chip controls the lamp 4 to output the actual light effect consistent with the target light effect according to the target light effect instruction and the characteristic data, the bottom chip calculates the appropriate light distribution ratio of the synthetic light according to the characteristic data and the input target color coordinates, and finally the bottom chip controls the lamp 4 to output the actual light effect consistent with the target light effect according to the light distribution ratio; the target light effect is the standard color light effect on the CIE-1931xy system chromaticity diagram corresponding to the target color coordinates, and the actual light effect is the light effect emitted by the lamp 4 after the target color coordinates are input to the bottom chip; Step S5, light effect consistency verification, the control center 1 controls the optical measuring instrument 4 to collect the optical data of the actual light effect again and send it to the control center 1, the control center 1 processes the standard optical data of the target light effect (standard chromaticity coordinates) and the test optical data of the actual light effect (measured chromaticity coordinates), see the attached Figure 3 To Attachment Figure 6, enter the target chromaticity coordinates (for example, input x1=0.333, y1=0.333; x2=0.55, y2=0.3; x3=0.3, y3=0.6; x4=0.2, y4=0.15) in different lamps 4 and the distance between the measured actual chromaticity coordinates. The smaller the distance, the smaller the error in the consistency of the light efficiency output by the lamp 4. The light efficiency quality of each lamp 4 can be clearly understood through this graph. We calculate and determine whether the distance between the standard chromaticity coordinates and the measured chromaticity coordinates is within the preset error range (±1%). If so, the lamp 4 is judged to be qualified. Otherwise, steps S2 to S5 are repeated, and the number of repetitions is set. If the judgment conditions are met within 3 repeated cycles, the lamp 43 is judged to be a qualified product; if the judgment conditions are still not met after 3 repeated cycles, the lamp 43 is judged to be a defective product and needs to be manually processed.

[0032] In the process of repeated cycles, we can also manually adjust the proportional coefficient of the light distribution ratio of each LED lamp bead externally, and then repeat steps S2 to S4 to make a new judgment, so as to speed up the process of light effect correction.

[0033] To further elaborate, in the test method created by the present invention, the spectral data is first converted into characteristic data in the control center 1 and sent to the underlying chip, which is beneficial to reducing the amount of calculation of the underlying chip and the amount of data that needs to be stored. At this time, the underlying chip can control the lamp 4 to output a light effect that is consistent with or close to the target color coordinates according to the input target color coordinates. This method can quickly detect whether the actual light effect and the target light effect are consistent, so as to determine whether the light effect quality of the lamp 4 is qualified. If it is unqualified, the light effect error can be further corrected, which can greatly improve the efficiency of detection, verification and correction of the lamp 4 products.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various equivalent changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test method based on a test system, characterized in that: The testing method comprises the following steps: Step S1, placing the lamp to be tested at a predetermined position in the test room; Step S2, optical data acquisition, the control center sends instructions to the lamp, and at the same time, the control center controls the optical measuring instrument to move to the test position through the driving motor, and the optical measuring instrument sends the tested optical data to the control center; Step S3, data processing, the control center calculates the obtained optical data through an algorithm to obtain required characteristic data, and the control center sends the required characteristic data to the bottom chip of the lamp; Step S4, the target light effect instruction is input, and the bottom chip controls the lamp to output the actual light effect consistent with the target light effect according to the target light effect instruction and the characteristic data; Step S5, verification of light effect consistency, the control center controls the optical measuring instrument to collect optical data of actual light effect again and sends it to the control center, the control center processes the standard optical data of target light effect and the test optical data of actual light effect, and determines whether the data processing result is within the preset error range, if so, the lamp is determined to be qualified, otherwise, steps S2 to S5 are repeated or it fails.

2. The testing method according to claim 1, characterized in that: In step S2, the optical data acquisition steps are as follows: Step S21, the control center controls the optical measuring instrument to return to an initial position, where the initial position of the optical measuring instrument is directly opposite to the first LED lamp bead at the head end of the lamp; Step S22, the control center controls the first LED lamp bead of the lamp to light up, and the other LED lamp beads are turned off, and the optical measuring instrument sends the optical data of the first LED lamp bead tested to the control center; In step S23, the control center controls the second LED lamp bead of the lamp to light up, and the other LED lamp beads are off. The control center controls the optical measuring instrument to move to the distance between the first LED lamp bead and the second LED lamp bead through the driving motor. The optical measuring instrument sends the optical data of the second LED lamp bead to the control center, and so on, until the optical data of all LED lamp beads are measured and obtained.

3. The testing method according to claim 1, characterized in that: In step S5, the number of times to repeat steps S2 to S5 is set. If the judgment condition is met within the set number of times, it is judged as qualified, otherwise, it is judged as unqualified.

4. The testing method according to claim 1, characterized in that: The control center is connected to the lamp through a DMX communication module.

5. The testing method according to claim 1, characterized in that: The optical data includes the maximum illumination value of the monochromatic light of n LED lamp beads, wherein each LED lamp bead includes monochromatic light of different colors; in step S3, the data processing steps are as follows: Step S31, setting a standard illumination value of a monochromatic light as Ex0, and the maximum illumination values ​​of the monochromatic light actually measured from the first LED lamp bead to the nth LED lamp bead are Ex1, Ex2...Exn respectively; Step S32, according to the formula Dim=255*Ex0 / Exn, the gray value ratio coefficient between each LED lamp bead is obtained, and the gray value ratio coefficient is sent to the bottom chip as feature data.

6. The testing method according to claim 5, characterized in that: In step S5, the standard optical data is a standard illumination value, and the test optical data is a measured illumination value, and a comparison is made to determine whether the standard illumination value and the measured illumination value are within a preset error range.

7. The testing method according to claim 1, characterized in that: The optical data includes spectrum data of n LED lamp beads. In step S3, the control center processes the spectrum data to obtain required color feature data and sends it to the bottom chip.

8. The testing method according to claim 7, characterized in that: In step S5, the standard optical data is the input standard chromaticity coordinates, and the test optical data is the measured chromaticity coordinates, and it is calculated and determined whether the distance between the standard chromaticity coordinates and the measured chromaticity coordinates is within a preset error range.

9. A test system for implementing any test method of claims 1 to 8, characterized in that: The test system includes a test room, a test platform, an optical measuring instrument and a control center. The test room provides a test space for the lamp. The test platform is arranged in the test room. The optical measuring instrument is movably arranged on the test platform. The control center is arranged outside the test room. The control center is connected to the lamp for communication. The control center controls the optical measuring instrument to move to a suitable position through the test platform to obtain optical data when the LED lamp beads of the lamp are lit. The optical measuring instrument feeds back the optical data to the control center.

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