LED driving electrical parameter automatic testing device

Abstract

The utility model discloses an LED drive electrical parameter automatic testing device comprising a system cabinet, and a testing instrument, a load and a computer host are integrated in the system cabinet. A test control program is built in the computer host; an operation table is arranged outside the system cabinet, and wiring terminals connected with a test instrument and a load in the system cabinet are arranged on the operation table; a display screen fixed through a hinge is arranged above the operation table. Samples to be tested are connected to a test circuit through a terminal reserved on an operation table, when multiple voltages or multiple samples need to be tested, the multiple samples to be tested are connected to the circuit on a workbench, and multiple test voltages are set by a program for testing at the same time; and automatic load switching can be realized by setting different load degrees of the electronic load, so that the labor investment is greatly reduced, and the test efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of hardware testing technology, and in particular to an automatic testing device for LED driver electrical parameters. Background Technology

[0002] The current conventional method for testing the input and output electrical parameters of LED drivers is to power them with a power supply, manually connect the voltage test terminals of the power meter in parallel to the input and output lines respectively, and connect the current test terminals in series to the input and output lines. Then, the data on the instrument is read and recorded manually.

[0003] The prior art patent application CN112710964A discloses an LED driver testing system, including a housing. The housing includes a fixed housing and a rotating cover movably hinged to the fixed housing. A control panel is provided on one side of the housing. A locking rod is slidably arranged inside the rotating cover. A pressure block is fixed to the top of the locking rod by screws. A connecting rod is welded to one side of the rotating cover. A hook is fixedly provided at the end of the connecting rod. A rotating shaft is rotatably arranged on the fixed housing. The housing used for testing is set as a split type, which can be easily opened when maintenance is required, so that the internal electrical components can be quickly inspected. The operation is convenient. The system adopts a structure with sliding rods, extrusion plates, and sealing gaskets. After the rotating cover is closed, the extrusion plate at the end can press the sealing gasket tightly, thereby sealing the joint of the rotating cover. Utility Model Content

[0004] Existing LED driver testing equipment has the following disadvantages: it is all integrated, making it inconvenient to maintain; due to the large number of internal electrical components, they are prone to mutual interference, affecting the test results; the test system has limited functionality and cannot meet the power supply requirements of all products; when there are multiple test voltages or a large number of test samples, it is necessary to manually switch voltages and samples, which is time-consuming and labor-intensive.

[0005] To solve the above problems, the technical solution provided by this utility model is as follows: an automatic testing device for LED driver electrical parameters, including a system cabinet, in which testing instruments, a load and a computer host are integrated; the computer host has a built-in test control program; an operating table is provided outside the system cabinet, and the operating table is provided with terminals connected to the testing instruments and the load in the system cabinet; a display screen is provided above the operating table and fixed by a hinge.

[0006] Specifically, the lower part of the system cabinet integrates a programmable frequency converter and a power meter. The main bodies of the programmable frequency converter and power meter are inside the system cabinet, while the operation buttons and display interface of the programmable frequency converter are exposed on the front of the system cabinet, as are the wiring terminals and display interface of the power meter. The embedded integrated design facilitates the individual operation of the programmable frequency converter and the power meter, and also makes it easy to disassemble, inspect, or replace them.

[0007] Specifically, an electronic load is embedded in the middle of the system cabinet. The main body of the electronic load is located above the control panel, while the control panel and display panel of the electronic load are exposed on the front of the system cabinet. The computer host can adjust the electronic load through a program to achieve automatic load switching.

[0008] Specifically, the control panel has an input connection terminal on the top and an output connection terminal on the bottom; the output connection cable of the output connection section is located below the control panel, and the output connection cable and the input connection cable are connected to the system cabinet from the rear of the control panel.

[0009] Specifically, the component under test (DUT) is fixed on the operating table and connected to the input and output terminals on the operating table for testing. When multiple voltages or multiple samples need to be tested, simply connect multiple DUTs to the circuit on the operating table through the terminals, and then set multiple test voltages in the program for testing.

[0010] Specifically, there is a drawer-style keyboard compartment under the control panel, on which the keyboard and mouse are placed; the keyboard and mouse are connected from behind the keyboard compartment to the host computer inside the system cabinet.

[0011] Specifically, the test control program inside the computer host controls instruments such as the programmable frequency converter, power meter, and electronic load in the system cabinet to perform test operations. Operators operate the test control program through the display screen, keyboard, and mouse to view the test results.

[0012] Specifically, the system cabinet is equipped with a USB interface, which is connected to the computer host inside the system cabinet for data export.

[0013] The beneficial effects of this invention are as follows: When multiple voltages or multiple samples need to be tested, simply connect the multiple samples to the circuit on the workbench and then set multiple test voltages in the program. Similarly, if the output load is not an LED load, different load levels of the electronic load can be set to achieve automatic load switching, greatly reducing manual labor and improving testing efficiency. Furthermore, the various testing instruments integrated into the system cabinet are distributed across different parts of the cabinet, minimizing mutual interference, and the embedded design facilitates the operation and disassembly / maintenance of each instrument. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the device of the present invention.

[0015] Figure 2 This is a top view of the operating console of the present invention.

[0016] Figure 3 This is the circuit schematic diagram of the present invention.

[0017] In the diagram, 1 is a pulley, 2 is a programmable frequency converter, 3 is the power meter input terminal, 4 is the power meter output terminal, 5 is a mouse, 6 is a keyboard, 7 is an operating console, 8 is an output connection terminal, 9 is a display screen, 10 is an input connection terminal, 11 is an input connection cable, 12 is an output connection cable, 13 is a USB interface, 14 is a hinge, 15 is a system cabinet, 16 is an electronic load, 17 is the input connection cable for the LED driver under test with its own load, 18 is the LED driver under test with its own load, 19 is the input connection cable for the LED driver under test without load, 20 is the LED driver under test without load, 21 is the output connection cable for the LED driver under test with its own load, 22 is the LED driver with its own load, and 23 is the output connection cable for the LED driver under test without load. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Example 1: An automatic testing device for LED driver electrical parameters, such as... Figure 1 As shown, the system includes a system cabinet 15, which integrates test instruments, loads, and a computer host. The computer host has a built-in test control program. An operating console 7 is located outside the system cabinet 15, and the operating console 7 has terminals for connecting to the test instruments and loads inside the system cabinet 15. Above the operating console 7, on the upper part of the system cabinet 15, is a display screen 9 fixed by a hinge 14. The display screen 9, fixed by the hinge 14, is easy to rotate and can be closed to save space when the equipment is shut down.

[0020] The lower part of the system cabinet 15 integrates the programmable frequency converter 2 and the power meter. The main bodies of the programmable frequency converter 2 and the power meter are inside the system cabinet 15, while the operation buttons and display interface of the programmable frequency converter 2 are exposed on the front of the system cabinet 15, and the wiring terminals and display interface of the power meter are also exposed on the front of the system cabinet 15. The embedded integrated design facilitates the individual operation of the programmable frequency converter 2 and the power meter, and also facilitates their disassembly, maintenance, or replacement.

[0021] An electronic load 16 is embedded in the middle of the system cabinet 15. The main body of the electronic load 16 is located above the control panel 7, and the control panel and display panel of the electronic load 16 are exposed on the front of the system cabinet 15. The computer host can adjust the electronic load 16 through a program to achieve automatic load switching.

[0022] The upper part of the control panel 7 is provided with an input connection terminal 10, and the lower part is provided with an output connection terminal 8; the output connection line 12 of the output connection section is located below the control panel 7, and the output connection line 12 and the input connection line 11 are connected to the system cabinet 15 from the rear of the control panel 7.

[0023] The component under test (DUT) is fixed on the operating table 7 and connected to the input terminal 10 and output terminal 8 on the operating table 7 for testing. When multiple voltages or multiple samples need to be tested, simply connect multiple DUTs to the circuit through the terminals on the operating table, and then set multiple test voltages in the program for testing.

[0024] Below the control panel 7 is a drawer-style keyboard compartment 6, on which a keyboard 6 and a mouse 5 are placed. The keyboard 6 and mouse 5 are connected from behind the keyboard compartment 6 to the host computer inside the system cabinet 15.

[0025] The test control program inside the computer host controls the programmable frequency converter 2, power meter and electronic load 16 in the control cabinet 15 to perform test operations. The operator operates the test control program through the display screen 9, keyboard 6 and mouse 5 to view the test results.

[0026] The system cabinet 15 is equipped with a USB interface 13, which is connected to the computer host inside the system cabinet 15 and can be used for data export.

[0027] During the testing process, a programmable power supply, power meter, and electronic load 16 were selected and connected to the computer host via an RS232 data cable. The parameter setting functions of the instruments were integrated into a single operating software through software programming. Then, the wiring port of the power meter and electronic load 16 was connected to the interface on the workbench for easy connection of the sample to be tested during subsequent testing.

[0028] When the electronic load 16 is not needed as the LED driver load, the driver under test and the built-in LED load are fixed on the operating table 7 and connected to the input connection terminal 10 and the output connection terminal 8, connecting to the programmable frequency converter 2 and the power meter inside the system cabinet 15. When multiple samples are tested, different samples can be connected to different input and output ports at the same time, and then different voltage input conditions and data reading time intervals can be set through software. After power-on, automatic testing is run.

[0029] When the electronic load 16 is needed as an LED driver load, the driver under test and the built-in LED load are fixed on the operating table 7, connected to the input connection terminal 10 and the output connection terminal 8, and connected to the electronic load 16, the programmable frequency converter 2 and the power meter in the system cabinet 15. When multiple samples are tested, different samples can be connected to different input and output ports at the same time, and then different voltage input conditions and data reading time intervals can be set through software. After powering on, the automatic test is run.

[0030] A detailed wiring diagram is shown below. Figure 3As shown, the negative terminal of the programmable frequency converter 2 inside system cabinet 15 is directly connected to the input terminal, which is connected to the input terminal of the LED driver under test. The positive terminal of the programmable frequency converter 2 passes through the current interface of the first power meter and connects to the input terminal, from which the first power meter obtains the input current data. At the same time, the voltage interface of the first power meter is connected across the positive and negative terminals of the input terminal to obtain the input voltage, thereby detecting and calculating the input power. The output terminal of the LED driver under test is connected to the output terminal, and the positive terminal of the output terminal is connected to the current interface of the second power meter, and then connected to the electronic load 16. The negative terminal of the electronic load 16 is directly connected to the negative terminal of the output terminal. The voltage sampling point of the second power meter is close to the output line of the LED driver to avoid interference from the load.

[0031] Before testing, the input conditions such as the electronic load 16 and power parameters can be set through the test control program on the computer host. During the test, the software automatically reads and saves the test results. The operator operates the program and views the test results through the display screen 9, and can export the test results data through the USB interface 13. When multiple voltages or multiple samples need to be tested, simply connect multiple samples to the circuit on the workbench and then set multiple test voltages in the program. Similarly, if the output load is not an LED load, different load levels can be set on the electronic load 16 to achieve automatic load switching. After starting the test, the test data can be automatically read at the set time intervals, and templates can be imported into the software to automatically generate reports, which greatly reduces manual input and improves testing efficiency.

[0032] Example 2: An automatic testing device for LED driver electrical parameters includes a system cabinet 15, which integrates testing instruments, a load, and a computer host. The computer host has a built-in testing control program. An operating table 7 is located outside the system cabinet 15, and the operating table 7 has terminals for connecting to the testing instruments and the load inside the system cabinet 15. A display screen 9 is fixed above the operating table 7 by a hinge 14. The bottom of the system cabinet 15 is also equipped with casters 1, which facilitates the movement of the entire operating device to different production and testing sites, making it convenient for operators to coordinate with production.

[0033] The lower part of the system cabinet 15 integrates the programmable frequency converter 2 and the power meter. The main bodies of the programmable frequency converter 2 and the power meter are inside the system cabinet 15, while the operation buttons and display interface of the programmable frequency converter 2 are exposed on the front of the system cabinet 15, and the wiring terminals and display interface of the power meter are also exposed on the front of the system cabinet 15. The embedded integrated design facilitates the individual operation of the programmable frequency converter 2 and the power meter, and also facilitates their disassembly, maintenance, or replacement.

[0034] An electronic load 16 is embedded in the middle of the system cabinet 15. The main body of the electronic load 16 is located above the control panel 7, and the control panel and display panel of the electronic load 16 are exposed on the front of the system cabinet 15. The computer host can adjust the electronic load 16 through a program to achieve automatic load switching.

[0035] Control panel 7 Figure 2 As shown, an input connection terminal 10 is located at the top, and an output connection terminal 8 is located at the bottom. The output connection cable 12 is located below the operating console 7, and the output connection cable 12 and the input connection cable 11 are connected together from the rear of the operating console 7 to the system cabinet 15. In this embodiment, half of the input connection terminal 10 and the output connection terminal 8 are connected to the electronic load 16, the programmable frequency converter 2, and the power meter inside the system cabinet 15, while the other half is only connected to the programmable frequency converter 2 and the power meter. The terminal connected only to the programmable frequency converter 2 and the power meter can be used to test the LED driver under test with its own load.

[0036] The LED driver under test is fixed on the operating table 7 and connected to the input connection terminal 10 and output connection terminal 8 on the operating table 7 for testing. When multiple voltages or multiple samples need to be tested, simply connect multiple samples to the circuit on the operating table through the terminals, and then set multiple test voltages in the program for testing. Through program control and the multi-terminal design of the operating table 7, large-scale testing of different models of LED drivers can be achieved. The test results are displayed on the display screen 9 by the test control program and saved in the computer host, eliminating the need for manual recording. Data can also be exported via USB interface 13, greatly reducing manual input and improving testing efficiency.

[0037] Below the control panel 7 is a drawer-style keyboard compartment 6, on which a keyboard 6 and a mouse 5 are placed. The keyboard 6 and mouse 5 are connected from behind the keyboard compartment 6 to the host computer inside the system cabinet 15. The operator uses the keyboard 6, mouse 5, and display screen 9 to operate the computer host and manipulate the test control program to adjust test parameters.

[0038] The test control program inside the computer host controls the programmable frequency converter 2, power meter and electronic load 16 in the control cabinet 15 to perform test operations. The operator operates the test control program through the display screen 9, keyboard 6 and mouse 5 to view the test results.

[0039] The system cabinet 15 is equipped with a USB interface 13, which is connected to the computer host inside the system cabinet 15 and can be used for data export.

[0040] During the testing process, a programmable power supply, power meter, and electronic load 16 were selected and connected to the computer host via an RS232 data cable. The parameter setting functions of the instruments were integrated into a single operating software through software programming. Then, the wiring port of the power meter and electronic load 16 was connected to the interface on the workbench for easy connection of the sample to be tested during subsequent testing.

[0041] When the electronic load 16 is not needed as the LED driver load, the driver under test and the built-in LED load are fixed on the operating table 7 and connected to the input connection terminal 10 and the output connection terminal 8, connecting to the programmable frequency converter 2 and the power meter inside the system cabinet 15. When multiple samples are tested, different samples can be connected to different input and output ports at the same time, and then different voltage input conditions and data reading time intervals can be set through software. After power-on, automatic testing is run.

[0042] When the electronic load 16 is needed as an LED driver load, the driver under test and the built-in LED load are fixed on the operating table 7, connected to the input connection terminal 10 and the output connection terminal 8, and connected to the electronic load 16, the programmable frequency converter 2 and the power meter in the system cabinet 15. When multiple samples are tested, different samples can be connected to different input and output ports at the same time, and then different voltage input conditions and data reading time intervals can be set through software. After powering on, the automatic test is run.

[0043] A detailed wiring diagram is shown below. Figure 3 As shown, the negative terminal of the programmable frequency converter 2 inside system cabinet 15 is directly connected to the input terminal, which is connected to the input terminal of the LED driver under test. The positive terminal of the programmable frequency converter 2 passes through the current interface of the first power meter and connects to the input terminal, from which the first power meter obtains the input current data. At the same time, the voltage interface of the first power meter is connected across the positive and negative terminals of the input terminal to obtain the input voltage, thereby detecting and calculating the input power. The output terminal of the LED driver under test is connected to the output terminal, and the positive terminal of the output terminal is connected to the current interface of the second power meter, and then connected to the electronic load 16. The negative terminal of the electronic load 16 is directly connected to the negative terminal of the output terminal. The voltage sampling point of the second power meter is close to the output line of the LED driver to avoid interference from the load.

[0044] Before testing, the input conditions such as the electronic load 16 and power parameters can be set through the test control program on the computer host. During the test, the software automatically reads and saves the test results. The operator operates the program and views the test results through the display screen 9, and can export the test results data through the USB interface 13. When multiple voltages or multiple samples need to be tested, simply connect multiple samples to the circuit on the workbench and then set multiple test voltages in the program. Similarly, if the output load is not an LED load, different load levels can be set on the electronic load 16 to achieve automatic load switching. After starting the test, the test data can be automatically read at the set time intervals, and templates can be imported into the software to automatically generate reports, which greatly reduces manual input and improves testing efficiency.

[0045] The above specific embodiments are merely preferred embodiments of this utility model, and are not intended to limit the specific implementation structure and scope of this utility model. In fact, some equivalent changes can be made according to the shape, structure, and design purpose of this utility model. Therefore, all equivalent changes made according to the shape, structure, and design purpose of this utility model should be included within the protection scope of this utility model, that is, these equivalent changes should all be protected by this utility model.

Claims

1. An automatic testing device for LED driver electrical parameters, characterized in that, It includes a system cabinet, which integrates test instruments, loads, and a computer host; the computer host has built-in test control programs; an operating console is located outside the system cabinet, with terminals for connecting to the test instruments and loads inside the system cabinet; and a display screen is fixed above the operating console by hinges.

2. The automatic testing device for LED driver electrical parameters according to claim 1, characterized in that, The lower part of the system cabinet integrates a programmable frequency converter and a power meter. The main bodies of the programmable frequency converter and the power meter are inside the system cabinet. The operation buttons and display interface of the programmable frequency converter are exposed on the front of the system cabinet, as are the wiring terminals and display interface of the power meter.

3. The automatic testing device for LED driver electrical parameters according to claim 1 or 2, characterized in that, The electronic load is embedded in the middle of the system cabinet. The main body of the electronic load is above the operating console, and the control panel and display panel of the electronic load are exposed on the front of the system cabinet.

4. The automatic testing device for LED driver electrical parameters according to claim 1, characterized in that, The control panel has an input connection terminal on the top and an output connection terminal on the bottom. The output connection cable of the output connection section is located below the control panel, and the output connection cable and the input connection cable are connected to the system cabinet from the rear of the control panel.

5. The automatic testing device for LED driver electrical parameters according to claim 1 or 4, characterized in that, The component under test is fixed on the operating table and connected to the input and output terminals on the operating table for testing.

6. The automatic testing device for LED driver electrical parameters according to claim 1 or 4, characterized in that, Below the control panel is a drawer-style keyboard compartment, on which the keyboard and mouse are placed; the keyboard and mouse are connected from behind the keyboard compartment to the host computer inside the system cabinet.

7. The automatic testing device for LED driver electrical parameters according to claim 1, characterized in that, The test control program inside the computer host controls the programmable frequency converter, power meter and electronic load in the system cabinet to perform test operations. The operator operates the test control program through the display screen, keyboard and mouse to view the test results.

8. The automatic testing device for LED driver electrical parameters according to claim 1, characterized in that, The system cabinet is equipped with a USB port, which can be connected to the computer host inside the system cabinet for data export.

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