CN204154883U - A kind of LED light tester - Google Patents
A kind of LED light tester Download PDFInfo
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- CN204154883U CN204154883U CN201420521093.8U CN201420521093U CN204154883U CN 204154883 U CN204154883 U CN 204154883U CN 201420521093 U CN201420521093 U CN 201420521093U CN 204154883 U CN204154883 U CN 204154883U
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Abstract
The utility model discloses a kind of LED light tester, comprise FPGA module, the power module be all connected with FPGA module, memory module, human-computer interface module, also include test output module, the serial communication modular be all connected with FPGA module, color sensor module, simulating signal input/output module, input and output distribution module, AD/DA control module in described simulating signal input/output module and described FPGA module connects to form a simulating signal generation module, described input and output distribution module is connected with the I/O port of described FPGA module, the output terminal of described input and output distribution module and described simulating signal input/output module is all connected with described test output module.The LED light tester that the utility model provides, has the function simultaneously can measuring electrical quantity and optical color parameter, and also has multiple test channel, has test speed fast, testing efficiency advantages of higher.
Description
Technical field
The utility model relates to a kind of tester, is specifically related to a kind of LED light tester.
Background technology
LED has the advantages such as brightness is high, excitation is high, cost is low, energy-conserving and environment-protective, widespread use in illumination, display, pilot lamp etc. already.In the manufacturing enterprise of LED light application, as in host computer instruction lamp line plate manufacturing enterprise, its automation degree is very high (reaching more than 90%), and substantially realize step integration, the mechanical automations such as the pan feeding of LED, punching press, shaping, welding, assembling, output and produce, but in Product checking, rest on the semi-automatic stage, even need the artificial stage participated in.Tracing it to its cause, is that also will judge that whether bright color is correct, whether colour purity (i.e. brightness, saturation degree, form and aspect) is enough because when detecting host computer instruction lamp line plate, not only need to judge whether pilot lamp can be bright.And if use and can detect LED luminance, saturation degree, during the professional LED parameter tester of form and aspect, then due to communication interface disunity, test speed is slow, and instrument price is high, thus have impact on production efficiency and the production cost of enterprise.Therefore, manually participating in detecting to usually needing in the Product checking of LED light, the normally existing wire test machine with having LED test function goes the electrical quantity measuring LED (to comprise conduction voltage drop, On current, inverse current, reverse pressure drop), and then go to measure optical color parameter (comprising brightness, saturation degree and form and aspect) with human eye.But due to human eye measurement, to there is detection speed slow, can not quantitative parameter index, cannot go out the shortcomings such as test report, thus affect quality and the production efficiency of product; And existing LED light tester, or only detect electrical quantity, or only detect optical color parameter, and there is communication interface disunity, the shortcomings such as test channel is few, and test speed is slow, and instrument price is high, greatly have impact on production efficiency and the production cost of enterprise.Therefore, improvement is needed in existing LED light test badly.
Utility model content
For overcoming the deficiencies in the prior art and Problems existing, the utility model provides a kind of LED light tester, and this tester has the function simultaneously can measuring electrical quantity and optical color parameter, and also has multiple test channel, has the advantages such as test speed is fast.
The utility model is achieved through the following technical solutions: a kind of LED light tester, comprise FPGA module, the power module be all connected with FPGA module, memory module, human-computer interface module, also include test output module, the serial communication modular be all connected with FPGA module, color sensor module, simulating signal input/output module, input and output distribution module, AD/DA control module in described simulating signal input/output module and described FPGA module connects to form a simulating signal generation module, described input and output distribution module is connected with the I/O port of described FPGA module, the output terminal of described input and output distribution module and described simulating signal input/output module is all connected with described test output module.
Further, described LED light tester also includes the feed back input output module be connected with described FPGA module; Preferably, described input and output distribution module comprises relay A and relay B, normal-closed end and the Chang Kaiduan of relay B of relay A are connected in parallel and are connected with signal source afterwards, by resistor network ground connection after the Chang Kaiduan of relay A and the normal-closed end of relay B are connected in parallel, the common port of described relay A, relay B is connected with the normal-closed end of the relay in described test output module or Chang Kaiduan.
Further, described LED light tester also includes the Network Interface Module be connected with described FPGA module.
Preferably, described color sensor module is the TCS230 color sensor that TAOS company of the U.S. produces.Described serial communication modular includes RS232 interface and/or RS485 interface, and described serial communication modular is connected with FPGA module by optocoupler.
Preferably, the input signal of the feed back input interface end of described feed back input output module adopts light-coupled isolation input, and the output signal of feedback output interface end adopts relay dry contact to export; Described test output module has 32 test ports; Described feed back input output module has at least 16 tunnel feedback output interface and at least 8 road feed back input interfaces.
Compared with the prior art, the LED light tester that the utility model provides, has the function can measuring electrical quantity and optical color parameter, solves the problem that existing LED light tester can only test single parameter well; This LED light tester also has multiple high speed test passage simultaneously, and test speed is fast, can greatly enhance productivity.
Accompanying drawing explanation
Fig. 1 is the structural schematic block diagram of LED light tester in the utility model embodiment;
Fig. 2 is the structural schematic block diagram of power module in the utility model embodiment;
Fig. 3 is the structural schematic block diagram of Network Interface Module in the utility model embodiment;
Fig. 4 is the interface diagram of color sensor module in the utility model embodiment;
Fig. 5 is the structural principle block diagram of simulating signal generation module in the utility model embodiment;
Fig. 6 is the structural schematic block diagram testing output module in the utility model embodiment;
Fig. 7 is the structural principle schematic diagram of feed back input output module in the present embodiment and the syndeton schematic diagram with test output module thereof;
Fig. 8 is the part-structure schematic block diagram of feed back input output module in the utility model embodiment;
Fig. 9 is when LED light carries out principle schematic when testing electrical quantity at test output module in the utility model embodiment.
Embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of LED light tester, comprise FPGA module, the power module be all connected with FPGA module, memory module, human-computer interface module, serial communication modular, color sensor module, simulating signal input/output module, input and output distribution module; AD/DA control module in described simulating signal input/output module and described FPGA module connects to form a simulating signal generation module, described input and output distribution module is connected with the I/O port of described FPGA module, also include test output module, the output terminal of described input and output distribution module and described simulating signal input/output module is all connected with described test output module.
As the improvement to technique scheme, described LED light tester also includes the feed back input output module be connected with described FPGA module.
As the further improvement to technique scheme, described LED light tester also includes the Network Interface Module be connected with described FPGA module.
Below explanation is explained in detail to each functional module of LED light tester:
FPGA module is the nucleus module of this LED light tester, mainly completes in this FPGA module the test job of LED light.Consider Industrialization, this LED light tester will be applied on production line on a large scale, and the fpga chip therefore in FPGA module wants comprehensive consideration in cost performance and system stability, and also will consider the long-term supply position of chip; In the present embodiment, fpga chip adopts the FPGA--5CGXFC7D6F31C7NES of the Cyclone V series of altera corp, this chip has very high cost performance, have 149.5K logical block (LE), 56,480 adaptive logic modules (ALM), 7,696 KB on-chip memories, 9 high-speed transceivers, 7 phaselocked loops (PLL), 312 18x18 multipliers, 560 pins, most multipotency provides 480 I/O ports.This fpga chip is the chip of existing application maturation, and its composition structure, principle of work and power etc. no longer describe in detail.
Power module is responsible for the voltage source civil power of AC power frequency 220V being converted to stable ± 12V and 5V, for each functional module provides power supply.± 12V voltage source mainly supplies simulating signal system, and 5V voltage source divides independently two-way, and a road is to simulation system, and another road is to digital display circuit, and its structural representation as shown in Figure 2.
Human-computer interface module comprises Keysheet module and display module, and in the present embodiment, Keysheet module adopts 5*5 matrix keyboard structure, and provide 25 buttons to use to user, display module then selects the TFT liquid crystal display of 640*480 resolution 16 looks.
Memory module, providing program to store and data storage for being responsible for, including FLASH memory and DDR3 storer.
Serial communication modular, be responsible for linking with host computer or other automation equipment the communication interface of testing, it had both included RS232 interface and had also included RS485 interface, and serial communication modular is connected with FPGA module by optocoupler, in order to carry out the protection of Phototube Coupling.
Network Interface Module, is responsible for ethernet communication, by the Ethernet driver IP kernel in FPGA module, external gigabit Ethernet PHY chip 88E1111 forms, and as shown in Figure 3, realizes the network service of gigabit Ethernet, network service can be provided, the functions such as instrument networkization is interconnected, remote upgrade.
Above-described power module, human-computer interface module, memory module, serial communication modular and Network Interface Module etc. are the attainable functional module of prior art, no longer describe in detail it.
Color sensor module, for the measurement of the optical color parameter (comprising brightness, saturation degree and form and aspect) of LED light.In the present embodiment, the TCS230 color sensor that color sensor module selects TAOS company of the U.S. to produce, its interface diagram as shown in Figure 4.The light signal of the LED light that TCS230 color sensor will detect gathers, and the component signal of the RGB collected (red-green-blue) is converted to HSL (brightness, saturation degree, form and aspect) signal and then judges for FPGA module.This color sensor has the features such as high, the programmable color selecting of resolution is calibrated with output, single power supply; It is integrated in configurable silicon photoelectric diode and current frequency converter on a single cmos circuit, on one chip, be integrated with RGB (RGB) three kinds of light filters, be the RGB color sensor that industry first has digital compatibility interface simultaneously.The output signal of TCS230 is digital quantity, TTL or the CMOS logic of standard can be driven to input, therefore can directly be connected with microprocessor or other logical circuits.
AD/DA control module in simulating signal input/output module and FPGA module connects to form a simulating signal generation module, gather the electrical quantity of LED light for generation of the simulating signal such as constant voltage, constant current, thus reach the object measuring LED light electrical quantity (electrical quantity such as conduction voltage drop, On current, inverse current, oppositely pressure drop as LED light).In the present embodiment, the structure theory of constitution figure of simulating signal generation module as shown in Figure 5, it adopts high-accuracy DAC to add amplifier emitter-base bandgap grading and promotes the mode of triode to produce constant voltage signal, be specially and produce 0-10V/50mA, resolution is 10mV, and stepping is the constant voltage signal of 20mV; The mode adopting high-accuracy DAC to add amplifier and triode dividing potential drop produces constant current signal; Be specially and produce 0-50mA/10V, resolution is 0.1mA, and stepping is the constant current signal of 0.2mA.
Test output module in the present embodiment has 32 test ports, every two test ports test a LED light, therefore it has 16 road measuring circuits, the test of 16 LED light (comprising the test of optical color parameter and electrical quantity) can be supported at most simultaneously, each test port includes two selector switchs and two relays, and its structure principle chart as shown in Figure 6.
Described input and output distribution module, distribute for carrying out switching to 32 test port Zhong 16 road measuring circuits of test output module, it adopts time division multiplexing principle, to realize testing 16 LED light simultaneously.As shown in Figure 7, input and output distribution module forms primarily of relay A and relay B two relays, after normal-closed end and the Chang Kaiduan of relay B of relay A are connected in parallel with signal source (as described in the constant pressure and flow signal source that produces in simulating signal generation module) be connected, by resistor network ground connection after the Chang Kaiduan of relay A and the normal-closed end of relay B are connected in parallel, the common port of relay A is connected with the normal-closed end (or Chang Kaiduan) of relays all in test output module, and the common port of relay B is connected with the Chang Kaiduan (or normal-closed end) of relays all in test output module.Relay A, relay B are the cores of these input and output distribution module, and these two relays are reverse operations, namely one another just will disconnect when closing, thus ensure that another relay just can only as input when a relay is as when exporting.
In accompanying drawing 7, the test output module shown in the right is actually the simplification module diagram of all relays of test output module in accompanying drawing 6, in test output module, the normal-closed end of its all relay all links together, and is then connected with the common port of one of them relay (as relay A) in input and output distribution module; In test output module, all Chang Kaiduan also link together, and then be connected with the common port of another relay (as relay B) in input and output distribution module, (for simplicity, in this figure, only draw two relays in test output module) as shown in Figure 7.
The LED light tester that the present embodiment provides, it is also configured with feed back input output module, for the test result of feedback test LED light.The test output module provided due to the present embodiment has 16 road measuring circuits, the test of 16 LED light can be supported at most simultaneously, therefore this feed back input output module is correspondingly configured with at least 16 tunnel feedback output interfaces, each road feedback output interface be used for test result to feed back to LED light tester with the use of machine (as LED light automatic production machine), the signal of each road feedback output interface feedback can be configured to test passes output signal or test failure output signal according to test result; In addition, this feed back input output module is also configured with multiple feedback input interface simultaneously, its for receive with LED light tester with the use of the control signal that sends of other machines, as started test for receiving, stop test, suspend the input of the control signals such as test, because these test signals are that all measuring circuits can use simultaneously, therefore be only configured with 8 road feed back input interfaces in this feed back input output module, can need of work be met.
In the present embodiment example, the input signal of the feed back input interface end of feed back input output module adopts light-coupled isolation input, and the output signal of feedback output interface end adopts relay dry contact to export, and its structural principle composition diagram as shown in Figure 8.Because the circuit structure of each road feedback output interface is identical, the circuit structure of each road feed back input interface is also identical, for simplicity, only depicts the feedback output interface terminal circuit structure of part and the circuit structure of feed back input interface in this accompanying drawing 7; In addition, the annexation of each components and parts as shown in Figure 8, is not described in detail in this.
The course of work of testing the LED light tester utilizing the present embodiment to provide below or principle of work make brief description: as shown in Figure 9, and accompanying drawing 9 is when LED light being placed in principle schematic when test output module carries out electric parameters testing.Test output module adopts series connection 4 line test philosophy LED light to be carried out to the test of electrical quantity, its signal source is constant voltage or constant current source signal (this signal source is from the constant pressure and flow signal source produced in described simulating signal generation module), signal source outputs signal the anode of tested LED, is also connected to MS interface simultaneously; The negative terminal of LED, then by sampling resistor grid grounding, is also connected with SR interface simultaneously.The two ends up and down of sampling resistor network (multiple resistance namely in parallel) connect RFR interface and RFG interface (two interfaces of measuring circuit) respectively.Then MS and SR two paths of signals can draw the voltage Vx at tested LED two ends after differential amplification process, RFR and RFG two paths of signals draws the voltage Vt at sampling resistor two ends after differential amplification process, so Vx is the conduction voltage drop of LED, can be drawn the On current of LED by It=Vt/R.As for the inverse current of LED and the test of reverse pressure drop, inverse current, oppositely pressure drop are identical with the test philosophy of On current, conduction voltage drop, and just the output signal of test port on the contrary, is no longer described in detail at this.
As when testing, if choose test port A1 and test port A32 two test ports (referring to the test output module shown in accompanying drawing 6) to carry out matching and test a LED as a measuring circuit, the constant voltage of signal source or constant current signal export from first relay of test port A1, and arrived MS interface by first selector switch, then signal has arrived test port A32 through LED, now signal can only enter from second of a test port A32 relay, by second selector switch, signal is connected to SR interface simultaneously.The signal of signal source exports from first relay of test port A1, and when being input to test port A32, but can only enter from first relay, realization is configured by described input and output distribution module, the signal assignment principle of input and output distribution module is above-mentioned to be explained, does not repeat them here.
The optical color parameter test process of LED light is then relatively simple, while the conduction voltage drop of LED light is tested, obtained the light signal of LED light by the TCS230 color sensor in color sensor module, namely FPGA module obtains the optical color parameter of LED light by TCS230 color sensor.In the present embodiment, because test output module has 16 each measuring circuits, i.e. 16 each test channel, the color sensor module therefore in the present embodiment is correspondingly configured with 16 TCS230 color sensors.
The LED light tester that the utility model provides, have can automatically measure the optical color parameter of LED light and the function of electrical quantity simultaneously, and multiple high speed test passage (simultaneously can measure at most electrical quantity and the optical color parameter of 16 LED light) is equipped with, there is test speed fast, testing efficiency advantages of higher.At present, in the LED light Xian Ban manufacturing enterprises such as production host computer, be that apparatus has the wire test machine of constant voltage constant current output function to test the electrical quantity (conduction voltage drop, On current, inverse current and oppositely pressure drop) of LED light mostly, and go to observe optical color parameter (brightness, saturation degree and form and aspect) carry out the Quality Detection of LED light with human eye.The LED light tester provided due to the utility model has can automatically measure the optical color parameter of LED light and the function of electrical quantity simultaneously, be applied on enterprise's production line, with the detection manually carrying out the optical color parameter detecting LED light in can effectively replacing existing enterprise to produce, thus realize the Aulomatizeted Detect of LED light optical color parameter, improve the production efficiency of enterprise.In more existing production host computer instruction lamp line plate manufacturing enterprises, a robotization machine is generally produced 4 groups simultaneously and is comprised 2 dual-colored LED instruction lamp line plates, if the optical color parameter of LED light need not be detected by artificial observation method, then need to adopt the professional LED light look parameter tester of configuration 8 to detect.When multiple stage specialty LED light look parameter tester and a line trigger Joint Production are tested, due to communication interface disunity, be difficult to coordinate, so that one will be changed machine and usually can only join a professional LED light look parameter tester, thus greatly have impact on the production efficiency of enterprise.And the LED light tester that the utility model provides, then for the feature that this robotization machine is produced, be configured with and there are 32 test output terminal mouths, the test of 16 LED light can be supported simultaneously; Therefore, the LED light tester provided by the utility model is applied on enterprise's production line, rapidly, can carry out Quality Detection on a large scale to LED light, thus greatly improve the production efficiency of enterprise.
Above-described embodiment is preferably implementation of the present utility model, is not to restriction of the present utility model, and under the prerequisite not departing from inventive concept of the present utility model, any apparent replacement is all within protection domain of the present utility model.
Claims (8)
1. a LED light tester, comprise FPGA module, the power module be all connected with FPGA module, memory module, human-computer interface module, it is characterized in that: also include test output module, the serial communication modular be all connected with FPGA module, color sensor module, simulating signal input/output module, input and output distribution module, AD/DA control module in described simulating signal input/output module and described FPGA module connects to form a simulating signal generation module, described input and output distribution module is connected with the I/O port of described FPGA module, the output terminal of described input and output distribution module and described simulating signal input/output module is all connected with described test output module.
2. LED light tester according to claim 1, is characterized in that: described LED light tester also includes the feed back input output module be connected with described FPGA module.
3. LED light tester according to claim 2, is characterized in that: described LED light tester also includes the Network Interface Module be connected with described FPGA module.
4. the LED light tester according to any one of claims 1 to 3, is characterized in that: described color sensor module is preferably the TCS230 color sensor that TAOS company of the U.S. produces.
5. LED light tester according to claim 4, is characterized in that: described serial communication modular includes RS232 interface and/or RS485 interface, and described serial communication modular is connected with FPGA module by optocoupler.
6. LED light tester according to claim 2, is characterized in that: described test output module has 32 test ports; Described feed back input output module has at least 16 tunnel feedback output interface and at least 8 road feed back input interfaces.
7. LED light tester according to claim 6, is characterized in that: the input signal of the feed back input interface end of described feed back input output module adopts light-coupled isolation input, and the output signal of feedback output interface end adopts relay dry contact to export.
8. LED light tester according to claim 2, it is characterized in that: described input and output distribution module comprises relay A and relay B, normal-closed end and the Chang Kaiduan of relay B of relay A are connected in parallel and are connected with signal source afterwards, by resistor network ground connection after the Chang Kaiduan of relay A and the normal-closed end of relay B are connected in parallel, the common port of described relay A, relay B is connected with the normal-closed end of the relay in described test output module or Chang Kaiduan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420521093.8U CN204154883U (en) | 2014-09-11 | 2014-09-11 | A kind of LED light tester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420521093.8U CN204154883U (en) | 2014-09-11 | 2014-09-11 | A kind of LED light tester |
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| CN204154883U true CN204154883U (en) | 2015-02-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950034A (en) * | 2016-01-07 | 2017-07-14 | 中兴通讯股份有限公司 | Light source state detecting system and method |
| CN111443299A (en) * | 2019-12-16 | 2020-07-24 | 中国计量大学上虞高等研究院有限公司 | L ED refrigerator lamp testing and aging screening device, system and method |
-
2014
- 2014-09-11 CN CN201420521093.8U patent/CN204154883U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950034A (en) * | 2016-01-07 | 2017-07-14 | 中兴通讯股份有限公司 | Light source state detecting system and method |
| CN111443299A (en) * | 2019-12-16 | 2020-07-24 | 中国计量大学上虞高等研究院有限公司 | L ED refrigerator lamp testing and aging screening device, system and method |
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