CN201184839Y - LED light source comprehensive luminescence characteristic detection device - Google Patents

Abstract

The utility model proposes a comprehensive luminescence characteristic detection device for LED light sources, which includes a detection sample seat and an LED characteristic detection device, and is characterized in that it also includes a guide rail, a measurement and control device and a data processor; the detection sample seat is arranged on the guide rail, along the guide rail Set at least two detection stations, each detection station is equipped with an LED characteristic detection device; the detection sample seat moves along the guide rail under the control of the measurement and control device; the LED characteristic detection device is fixed on the sample on the detection sample seat Perform detection and transmit the detection signal to the measurement and control device; the data processor reads the detection signal from the measurement and control device and analyzes and processes it. The utility model solves the common problems of low integration and complicated detection procedures in current LED detection instruments, has more comprehensive detection ability of luminous characteristics, and effectively realizes the online continuous detection function.

Description

LED light source comprehensive luminescence characteristic detection device

technical field

The utility model relates to the technical field of optical detection, in particular to a comprehensive luminescence characteristic detection device of an LED light source.

Background technique

LED is a solid light-emitting device made of semiconductor materials. It is also a typical new "green" high-efficiency light source. It has the advantages of high efficiency, low power consumption, long life, and fast response. In addition, its small size , vibration resistance, reliability and durability, suitable for mass production, and can meet the application requirements of various lighting and display.

In all aspects of LED application products from design, production, testing to entering the market, it is hoped that the characteristics and quality of LED light sources can be accurately and reliably detected. The international standard CIE 127-1997 "Measurement of LEDs" and the industry standard "Test Method for Semiconductor Light-Emitting Diodes" formulated by the Optoelectronic Devices Branch of China Optical Optoelectronics Industry Association stipulate the general test methods for LEDs, including the electrical characteristics of LEDs. Parameters, photometric parameters, chromaticity parameters, etc., which are the basis for testing the characteristics of LEDs and their application products. Among them, the electrical characteristic parameters mainly include voltage, current, power, etc., the photometric parameters mainly include light intensity, luminous flux, luminous spectrum, light intensity spatial distribution, etc., and the chromaticity parameters include dominant wavelength, color temperature, color coordinates, color purity, etc.

At present, the performance of special testing instruments for testing the luminous characteristics of these LED light sources is relatively single. Generally, one testing instrument can only complete 1-2 of the parameters, so that the detection of the comprehensive luminous characteristics of the entire LED light source needs to rely on multiple different testing instruments. Completed separately. This requires loading and unloading the LED light source sample to be tested many times, and the test period is long, the test procedure is complicated, and the accuracy and reliability of the test results are not high.

For LED and LED application products, online inspection and quality control are also required in the production process. At present, online detection of light intensity and luminescence spectrum, luminous flux and luminescence spectrum, and light intensity screening have been realized respectively. However, due to the structural differences of different characteristic detection instruments, it takes a long time to detect the spatial distribution of light intensity at the same time. Carry out a more comprehensive online continuous detection of the comprehensive luminous characteristics of LED light sources.

Contents of the invention

The technical problem to be solved by the utility model is to provide a comprehensive luminous characteristic detection device for LED light sources to overcome the defects of single performance of existing detection instruments and the need to rely on multiple instruments to complete the comprehensive luminous characteristic detection of LED light sources.

In order to solve the above-mentioned technical problems, the utility model is realized through the following technical solutions: a comprehensive luminescence characteristic detection device for LED light source, including a detection sample holder, an LED characteristic detection device, and is characterized in that it also includes a guide rail, a measurement and control device and a data processing device. The detection sample seat is arranged on the guide rail, and at least two detection stations are arranged along the guide rail, and an LED characteristic detection device is installed on each detection station; the detection sample seat moves along the guide rail under the control of the measurement and control device; the LED The characteristic detection device detects the sample fixed on the detection sample seat, and transmits the detection signal to the measurement and control device; the data processor reads the detection signal from the measurement and control device and analyzes and processes it. The sample moves along the guide rail driven by the detection sample seat; under the control of the measurement and control device, the sample stops every time it passes under a detection bracket, and after the LED characteristic detection device on the detection bracket collects the corresponding detection signal, The measurement and control device then controls the sample to continue moving along the guide rail, and reaches the bottom of the next detection bracket for corresponding detection data collection, thereby completing the online continuous detection of comprehensive luminescence characteristics.

The above-mentioned LED light source comprehensive luminescence characteristic detection device is further provided with a base frame, on which the guide rail and detection stations are arranged; each detection station is also provided with a detection bracket, and the LED characteristic detection device is installed on the detection bracket.

The measurement and control device includes a control circuit, a signal acquisition circuit, a positioning sensor whose quantity is consistent with the number of detection brackets, and each detection bracket is provided with a positioning sensor; the control circuit is connected with the positioning sensor, guide rail, and data processor respectively; the signal acquisition circuit It is connected with the LED characteristic detection device and the data processor. The data processor is a computer equipped with measurement and control software.

The guide rail includes a slide block and a track; the slide block is arranged on the track and connected with the detection sample seat, and the test sample seat moves along the track together with the slide block.

The detection station is provided with three, and the detection bracket includes a first detection bracket, a second detection bracket and a third detection bracket; the LED characteristic detection device is composed of different test instruments for the luminous characteristics of LED light sources, including The light intensity meter and camera on the top, the integrating sphere fixed on the second detection bracket, the fast detector of light intensity spatial distribution characteristics fixed on the third detection bracket, wherein the photometer and the spectrometer are respectively installed on the light holes of the integrating sphere detection probe.

Both sides of the second detection bracket are provided with moving guide rails, which can drive the integrating sphere to move up and down, and can also drive the integrating sphere to turn left and right.

The detection sample seat is equipped with an LED light source installation fixture or an interface, and electrodes connected with a driving constant current source.

The continuous testing device for comprehensive luminous characteristics of LED light sources can be used as a set of independent continuous testing devices, and can also be connected and configured in related production lines for on-line testing. Make some changes on the basis of the device, adopt part of the test items, or add some test instruments to expand the test items, but as long as it does not depart from the spirit and scope of the utility model, it all falls within the protection scope of the claims of the utility model.

The LED light source comprehensive luminous characteristic detection device proposed by the utility model effectively solves the problems of low integration and complex detection procedures common in current LED detection instruments, the comprehensive detection ability of luminous characteristics is more comprehensive, and the online continuous detection is effectively realized function, so that it has the feasibility of both scientific analysis instruments and online testing equipment, reflecting the outstanding advantages of comprehensive, automatic, integrated, continuous and online, greatly improving the integration and automation level of testing instruments, shortening the testing time, simplifying The test procedure is simplified, the test data information is enriched, the test capability is expanded, and the reliability and correctness of the test data and results are effectively guaranteed.

The utility model is suitable for the on-line continuous detection of the comprehensive luminous characteristics of all LEDs, LED light sources and LED application products, and is also suitable for the online continuous detection of the comprehensive luminous characteristics of other lighting sources and lamps.

Description of drawings

Fig. 1 is the system connection schematic diagram of the present utility model;

Fig. 2 is the system structure schematic diagram of the present utility model;

Fig. 3 is the structural diagram of the light intensity detection station of the present invention;

Fig. 4 is the structural diagram of integrating sphere detection station of the present utility model;

Fig. 5 is the light intensity spatial distribution detection station (internal) structural diagram of the utility model;

Fig. 6 is a detection flowchart of the utility model.

Detailed ways

Describe in detail below in conjunction with accompanying drawing:

As shown in Figures 1 and 2, the utility model includes a base frame 1, a guide rail 2, a detection sample holder 4, a detection support 3, an LED characteristic detection device 5, a measurement and control device 6 and a data processor, wherein the data processor is provided with A computer with measurement and control software7. The detection sample seat is arranged on the guide rail, the guide rail 2 and the detection bracket 3 are installed on the base frame 1, and at least two detection stations are arranged along the transverse direction of the guide rail, and a detection bracket is set up on each detection station, and each detection LED characteristic detection devices are installed on the brackets.

Measurement and control device 6 comprises control circuit 62, signal acquisition circuit 63, the position sensor 61 that quantity is consistent with detection support quantity, and each detection support 3 is provided with a position sensor 61; Control circuit 62 is connected with position sensor 61, guide rail 2, computer respectively. 7 connection; the signal acquisition circuit 63 is connected with the LED characteristic detection device 5 and the computer 7. The detection sample seat 4 moves along the guide rail 2 under the control of the measurement and control device 6; the LED characteristic detection device 5 detects the sample fixed on the detection sample seat 4, and transmits the detection signal to the measurement and control device 6; the computer 7 from the measurement and control device The detection signal is read and analyzed. Guide rail 2 comprises slide block 21 and track 22, and the motor 23 that is arranged on track 22 one end, and wherein slide block 21 is arranged on track 22 and is connected with detection sample holder 4, and detection sample holder 4 is together with slide block 21, in motor 23 Driven to move along the track 22.

In this embodiment, a total of 3 test stations are designed and adopted on the guide rail 2, one of which is based on the light intensity test, the second of the test station is based on the integrating sphere test, and the third of the test station is based on the spatial distribution test. Correspondingly, a detection bracket is respectively installed above each detection station, and the detection bracket 3 includes a first detection bracket 31 , a second detection bracket 32 and a third detection bracket 33 . The LED characteristic detection device 5 comprises the light intensity meter 52 and the CCD camera 56 that are fixed on the first detection support 31, the integrating sphere 53 that is fixed on the second detection support 32, the light intensity spatial distribution that is fixed on the 3rd detection support 33 A characteristic fast detector 57, wherein the detection probes of the photometer 54 and the spectrometer 55 are respectively installed on the light holes of the integrating sphere 53. The luminous characteristics of the comprehensive test include photometric parameters such as luminous image, luminous intensity, luminous flux, luminous spectrum, and spatial distribution of luminous intensity, chromaticity parameters such as dominant wavelength, color temperature, color coordinates, and color purity, electrical parameters such as voltage, current, and power, and Aging characteristics related to test time, etc.

The LED light source sample 8 to be tested is installed on the test sample holder 3, and the test sample holder 3 is placed on the moving slider 21 on the guide rail 2, and driven by the motor 23 in the guide rail, it moves back and forth along the track 22 of the guide rail, and Under the control of the measurement and control device 6 and the computer 7 with measurement and control software, the LED light source 8 to be tested passes through different detection stations in sequence, and the various detection instruments in the LED characteristic detection device 5 perform continuous detection of different luminous characteristics. The positioning sensor 61 in 6 and the control circuit 62 cooperate with each other to control the automatic operation of the detection sample holder and ensure accurate positioning. The computer 7 equipped with measurement and control software can be connected to the detection instrument through the RS232, 485 or USB interface, and can also collect the detection signal through the signal acquisition circuit 63 multi-channel, perform summary processing, calculation analysis and result display, and realize the comprehensive luminous characteristics of the LED light source. Online continuous detection.

In this embodiment, the guide rail 2 adopts a linear guide rail, and the driving motor 22 adopts a variable frequency motor. Under the control of the computer, the detection sample holder 4 is driven to move linearly back and forth along the guide rail, passing through three detection stations on the guide rail in turn. The positioning sensor 61 adopts a photoelectric sensor, and through the precise detection of the photoelectric signal, the detection sample seat is controlled to accurately stop at the detection positions of the three detection stations in sequence. Connected, it is powered on, and the luminous characteristic detection is carried out.

As shown in FIG. 3 , the detection station one is based on light intensity detection, and a light intensity meter 51 and a CCD camera 56 are respectively installed on the first detection bracket 31 . The light intensity meter is installed in the direction of the light axis, and the detection distance is adjusted by moving the detection bracket up and down. It includes testing the average luminous intensity of LED light sources according to two standards stipulated by CIE, and the detection distances are 100 and 316mm respectively. CCD cameras can be installed in different positions to record the appearance and light-emitting images of the LED light source from different angles.

As shown in Figure 4, detection station two is based on integrating sphere detection, and integrating sphere 58 is fixed on the second detection support 32 of this detection station, and photometer 54 and spectrometer are respectively installed on the light hole on the integrating sphere 55 detection probes, the luminous flux is tested by the photometer, the luminescent spectrum is tested by the spectrometer, and the chromaticity parameters are calculated.

The moving guide rails are added on both sides of the detection bracket that fixes the integrating sphere, so that the integrating sphere can move up and down. During the test, the integrating sphere falls down automatically, so that the LED light source to be tested is placed at the test hole in the integrating sphere, so that all the light emitted by the LED light source to be tested enters the integrating sphere. The integrating sphere can also be turned left and right to place the LED light source at the test position. After the test, the integrating sphere rises automatically, allowing the LED light source to be tested to continue to move forward.

As shown in Figure 5, the third detection station is based on the detection of the spatial distribution characteristics of light intensity, a fast detector 57 of the spatial distribution characteristics of light intensity is installed on the third detection bracket 33, and a multi-channel photometric detection unit synchronous detection method is adopted. , to realize one-time rapid detection of the two-dimensional light intensity spatial distribution characteristics of the LED light source.

The utility model adopts an integrated, automatic and continuous detection method to carry out online continuous detection of the comprehensive luminous characteristics of LED light sources, including the following steps:

1. Start the online continuous detection system for comprehensive luminous characteristics of LED light sources, turn on the computer and test software, turn on all test instruments, and perform initialization and instrument calibration;

2. Install the LED light source to be tested on the test sample holder, and set the test parameters;

3. Run the detection software, according to the test requirements and parameter settings, the computer controls the detection sample seat to move forward on the guide rail, and under the action of the positioning sensor, it is accurately positioned at the detection position of the first detection station;

4. The LED light source to be tested is in the lighted state, and the detection instrument at the first detection station performs the corresponding luminous characteristic detection synchronously. The driving current, detection time and other parameters are preset, and the detection signal is collected, summarized and processed by the computer and detection software. and analysis, until the detection of the luminescent characteristics of the first detection station is completed, the collection of detection signals is stopped;

5. The computer-controlled detection sample holder automatically starts and continues to move forward on the guide rail, and is precisely positioned at the detection position of the second detection station under the action of the positioning sensor;

6. The LED light source to be tested is in the lighting state, and the detection instrument at the second detection station performs luminous characteristic detection synchronously. The driving current, detection time and other parameters are preset, and the detection signal is collected, summarized, processed and analyzed by the computer and detection software. , until the detection of the luminous characteristics of the second detection station is completed, and the collection of detection signals is stopped;

7. If there are follow-up detection stations, the system will repeat the above 5-6 detection steps until the LED light source to be tested passes through all the detection stations, and automatically and continuously complete the online detection process of the entire comprehensive luminous characteristics;

8. The computer and testing software perform summary processing, calculation and analysis on all testing data, display testing results in multiple windows, save test results, print testing reports, etc. according to user requirements.

The online continuous detection system for comprehensive luminous characteristics of LED light sources can be used as an independent detection system, or can be connected and configured in a related production line for online detection. Make some changes on the basis of the system, adopt some of the testing items, or add some other characteristic testing, but as long as it does not depart from the spirit and scope of the utility model, it all falls within the protection scope of the utility model claims.

Combined with Figure 6, the test process in this example is described as follows:

First, turn on the system, start the online continuous detection system for comprehensive luminescence characteristics of the LED light source, turn on the computer and the test software 7, turn on all the detection instruments in the LED characteristic detection device 5, and perform initialization and instrument calibration. Then install the LED light source to be tested on the test sample holder, connect it to the drive constant current source through the electrodes, and set the test parameters at the same time, including setting the drive current and the test time of each station.

Then start to run the detection software, according to the test requirements and parameter settings, the computer controls the detection sample seat to move forward on the guide rail, and under the action of the positioning sensor, it is precisely positioned on the detection position of the first detection station. At this time, drive the constant current source to provide driving power to the LED light source to be tested, so that it is in a lighting state, and the detection instrument at the first detection station simultaneously performs corresponding luminous characteristic detection, including the average light intensity detected by the light intensity meter, and the CCD The camera records the luminescent image and detects the driving current and voltage synchronously. Detection signals such as voltage, current, light intensity, time, and luminescence images are collected, summarized, calculated, and analyzed by the computer and detection software in multiple channels, and the collection of detection signals is stopped until the detection time is reached, and the luminescence characteristics of the first detection station are completed. detection.

Then the computer controls the detection sample seat to move again and continue to move forward on the guide rail, and under the action of the positioning sensor, it is precisely positioned on the detection position of the second detection station. The integrating sphere falls down automatically, so that the LED light source to be tested is placed at the test through hole in the integrating sphere, the LED light source to be tested is in the lighted state, and all the emitted light enters the integrating sphere, and the detection instrument at the second detection station performs synchronously. The detection of luminescence characteristics includes detection of luminous flux by photometer, detection of luminescence spectrum by spectrometer, and simultaneous detection of driving current and voltage. Detection signals such as voltage, current, luminous flux, and luminescence spectrum are collected, summarized, calculated, and analyzed by the computer and detection software through multiple channels, including the calculation of chromaticity parameters. The collection of detection signals is stopped until the detection time is reached, and the second detection station is completed. The luminous characteristic detection, the integrating sphere rises automatically, so that the LED light source to be tested can continue to move forward.

Then the computer controls the detection sample seat to move again and continue to move forward on the guide rail, and under the action of the positioning sensor, it is precisely positioned on the detection position of the third detection station. The LED light source to be tested is in the lighted state, and the detection instrument at the second detection station performs the detection of the spatial characteristics of the light intensity, and uses 31 photometric detection units to simultaneously detect the spatial distribution characteristics of the LED light intensity. The photometric detector uses silicon photocells to The luminous point of the LED light source to be tested on the test sample seat is the center of the circle, and is evenly distributed along the semicircle track. The received optical signal from the LED light source is converted into an electrical signal, and input to the system through a multi-channel photoelectric conversion circuit and signal acquisition circuit. The test software performs summary processing and calculation analysis, simultaneously detects the relative light intensity spatial distribution of fixed solid angles in different directions, obtains the two-dimensional light intensity spatial distribution curve at one time in a very short period of time, and calculates the emission angle. When the detection time is reached, the collection of detection signals is stopped, and the detection of the spatial distribution characteristics of light intensity is completed.

At this time, the LED light source to be tested passes through three detection stations, and automatically and continuously completes the online detection process of the entire comprehensive luminous characteristics. The computer and testing software perform summary processing, calculation and analysis of all testing data, display testing results in multiple windows, save test results, print testing reports, etc. according to user requirements.

Claims (10)

1. a led light source integrative luminescence properties of light emitting pick-up unit comprises test sample seat, LED characteristic detection device, it is characterized in that: also comprise guide rail, measure and control device and data processor; The test sample seat is arranged on the guide rail, detects station along at least two of guide rail settings, and each detects on the station LED characteristic detection device all is installed; Described test sample seat moves at the control lower edge of measure and control device guide rail; The LED characteristic detection device detects the sample that is fixed on the test sample seat, and detection signal is transferred to measure and control device; Data processor reads detection signal and it is carried out analyzing and processing from measure and control device.

2. led light source integrative luminescence properties of light emitting pick-up unit according to claim 1 is characterized in that: further be provided with pedestal, guide rail and detection station are arranged on this pedestal; Each detects and also is provided with a detection support on the station, and the LED characteristic detection device is installed in and detects on the support.

3. led light source integrative luminescence properties of light emitting pick-up unit according to claim 2, it is characterized in that: described measure and control device comprises control circuit, signal acquisition circuit, the alignment sensor that quantity is consistent with the detection number of holders, and each detects support and is provided with an alignment sensor; Control circuit is connected with alignment sensor, guide rail, data processor respectively; Signal acquisition circuit is connected with data processor with the LED characteristic detection device.

4. led light source integrative luminescence properties of light emitting pick-up unit according to claim 1 and 2, it is characterized in that: described guide rail comprises slide block and track; Wherein the slide block setting is connected in orbit and with the test sample seat, and the test sample seat moves along track with slide block.

5. led light source integrative luminescence properties of light emitting pick-up unit according to claim 4 is characterized in that: described guide rail also comprises the end that is arranged on track, drive the motor that test sample seat and slide block move along track.

6. according to claim 2 or 5 described led light source integrative luminescence properties of light emitting pick-up units, it is characterized in that: described detection station is provided with three, detects support and comprises that first detects support, the second detection support and the 3rd detection support; The LED characteristic detection device is made up of the testing tool of the different led light source characteristics of luminescences, comprise being fixed on and first detect light intensity meter and video camera on the support, be fixed on and second detect integrating sphere on the support, be fixed on the 3rd light intensity spatial characteristics fast detecting instrument that detects on the support, the wherein detection probe of on the light hole of integrating sphere photometer and spectrometer being installed respectively.

7. according to claim 1 or 2 or 5 described led light source integrative luminescence properties of light emitting pick-up units, it is characterized in that: described test sample seat is equipped with led light source sectional fixture or interface, and the electrode that is connected with the driving constant current source.

8. according to claim 1 or 2 or 5 described led light source integrative luminescence properties of light emitting pick-up units, it is characterized in that: described data processor is the computing machine that is provided with TT﹠C software.

9. led light source integrative luminescence properties of light emitting pick-up unit according to claim 6 is characterized in that: described second both sides of detecting support are provided with moving guide rail, can drive integrating sphere and move up and down.

10. led light source integrative luminescence properties of light emitting pick-up unit according to claim 6 is characterized in that: the described second detection support can drive about integrating sphere and overturn.

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