Test system for current sensor
By designing a combination of a test cabinet, current reversing fixture, 2000A current source, and high and low temperature humidity test chamber, the problem of low efficiency in existing current sensor test systems was solved, achieving efficient automated testing and reducing production costs.
Patent Information
- Application Number
- CN202422858895.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing testing systems for current sensors can only manually test eight products at a time, which is inefficient.
A testing system consisting of a test cabinet, current reversing fixture, 2000A current source, test device, and high and low temperature humidity test chamber was designed. The system achieves automated testing through the connection of 485 communication bus, CAN signal bus and 120 square millimeter cable, and can test 300 products at the same time.
It enables automated testing of 300 products in a single run, improving testing efficiency and reducing production costs.
Smart Images
Figure CN223597881U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic energy storage field technical field especially relates to a test system for current sensor. BACKGROUND
[0002] Current sensor is a kind of current detection device, can feel the information of measured current, and can change the information felt by detection into the electric signal or other required form information output in accordance with certain rule, to meet the requirements such as transmission, processing, storage, display, record and control of information.
[0003] At present, the test system for current sensor has the following problems: single can only manually test 8 products, low efficiency. UTILITY MODEL CONTENTS
[0004] To solve the above problems, the utility model discloses a test system for current sensor.
[0005] Specific scheme is as follows:
[0006] A test system for current sensor is composed of test cabinet, current reversing tool, 2000A current source, test device and high-low temperature and humidity test chamber;Wherein, test cabinet is connected with current reversing tool, 2000A current source, test device and high-low temperature and humidity test chamber, 2000A current source is connected with current reversing tool, and current reversing tool is connected with test device.
[0007] Current reversing tool and test cabinet are connected through 485 communication 1 bus, 2000A current source and test cabinet are connected through 485 communication 2 bus, test device and test cabinet are connected through CAN signal bus, high-low temperature and humidity test chamber and test cabinet are connected through 485 communication 3 bus, 2000A current source and current reversing tool are connected through 120 square millimeter cable, and current reversing tool and test device are connected through 120 square millimeter cable.
[0008] The test cabinet comprises a box body and a main control board, a switching board, an industrial computer and a switch arranged in the box body; two product interface ends are arranged on the switching board in a left-right symmetrical manner for connecting eight products, and two first network ports are also arranged on the switching board in a left-right symmetrical manner; three second network ports are arranged on the main control board, two of which are connected with the two first network ports (the network ports on the main control board and the switching board are in one-to-one correspondence), a power input port for connecting with a power supply is further arranged on the main control board, and a third network port for connecting with the switch is further arranged on the main control board; the switch is connected with the industrial computer; the main control board is arranged in multiple layers and evenly distributed in the box body, the switching board is arranged in multiple layers and evenly distributed in the box body, and the industrial computer and the switch are arranged at the bottom of the box body.
[0009] The current commutation tool comprises an open front outer box body, mounting rails are arranged on both sides of the inner cavity of the outer box body, and a bottom plate is arranged between the two mounting rails, a relay switch, a 485 module and two 50A AC contactors arranged in a left-right manner are arranged on the upper front side of the bottom plate, two 2000A AC contactors arranged in a left-right manner are arranged on the lower front side of the bottom plate, the relay switch supplies power to the 485 module, the 50A AC contactors and the 2000A AC contactors, the contact points of the two 50A AC contactors and the contact points of the two 2000A AC contactors are connected together through copper connecting blocks respectively.
[0010] The two 2000A AC contactors are 2000A AC contactor one and 2000A AC contactor two arranged in a left-right manner, the four top corner contact points of the 2000A AC contactor one are positive electrode A, negative electrode B, output end D and output end C in sequence in a clockwise direction from the upper left corner, and the four top corner contact points of the 2000A AC contactor two are positive electrode E, negative electrode F, output end H and output end G in sequence in a clockwise direction from the upper left corner, wherein the positive electrode A and the positive electrode E are connected through a copper connecting block, the negative electrode B and the negative electrode F are connected through a copper connecting block, the output end D and the output end G are connected through a copper connecting block, and the output end C and the output end H are connected through a copper connecting block; the two 50A AC contactors are 50A AC contactor one and 50A AC contactor two arranged in a left-right manner, the first and third contact points from left to right on the top of the 50A AC contactor one are positive electrode I and negative electrode J respectively, and the first and third contact points from left to right at the bottom are output end K and output end L respectively, the first and third contact points from left to right on the top of the 50A AC contactor two are positive electrode M and negative electrode N respectively, and the first and third contact points from left to right at the bottom are output end O and output end P respectively, the positive electrode I and the positive electrode M are connected through a copper connecting block, the negative electrode J and the negative electrode N are connected through a copper connecting block, the output end L and the output end O are connected through a copper connecting block, and the output end K and the output end P are connected through a copper connecting block.
[0011] The output end K and the output end L of the 50A AC contactor one are connected to the output end C and the output end D of the 2000A AC contactor one respectively, and the output end K and the output end L of the 50A AC contactor one are also connected to the test device; the relay switch is connected to the 2000A current source, and the output current greater than 20A in the 2000A current source is input to the 2000A AC contactor one, and the output current not greater than 20A is input to the 50A AC contactor one; the 485 module is connected to the upper computer.
[0012] The test device comprises a test tool and a turnover vehicle, wherein the test tool is used for testing the product to be tested in the cavity of the high-low temperature test box, and the turnover vehicle is used for carrying the test tool sliding out of the cavity of the high-low temperature test box, wherein the product to be tested is a current sensor; the test tool comprises an aluminum alloy framework, the aluminum alloy framework is a three-layer frame structure, each layer of which is provided with an FR-4 support base and a main plate, the bottom is provided with a tool pulley, the main plate is a rectangular plate and is arranged in the middle of the top surface of the FR-4 support base, six transversely arranged copper connecting rods are arranged in front of the main plate from front to back, three middle copper connecting blocks are arranged on the left side of the FR-4 support base in the longitudinal direction, and two middle copper connecting blocks and two end copper connecting blocks are arranged on the right side of the FR-4 support base in the longitudinal direction, wherein the middle copper connecting blocks and the end copper connecting blocks are connected with the ends of the copper connecting rods, the test product is strung on the copper connecting rods, four P connectors corresponding in position and in number with the test product are welded on the top surface of the main plate and used for connecting with the test product, a 100P connector used for connecting with the upper computer is also welded on the rear side of the top surface of the main plate, and the cavity of the high-low temperature test box is provided with a bottom rail for the tool pulley to slide.
[0013] The two middle copper connecting blocks on the right side of the FR-4 support base are located between the two end copper connecting blocks, the five middle copper connecting blocks on the two sides of the FR-4 support base sequentially connect the six copper connecting rods, and the two end copper connecting blocks are connected with the right ends of the copper connecting rods at the frontmost and the rearmost respectively, wherein the end copper connecting blocks at the front of the upper and middle layers are connected through the upper and lower copper connecting blocks, the end copper connecting blocks at the rear of the middle and lower layers are connected through the upper and lower copper connecting blocks, and an interconnected electric circuit is formed; a test tool handle is arranged on the front side of the upper layer of the aluminum alloy framework; the turnover vehicle comprises an aluminum profile framework, the aluminum profile framework is a three-layer frame structure, an upper layer partition plate and a middle layer partition plate are arranged on the upper layer and the middle layer respectively, and a turnover vehicle pulley is arranged at the bottom; a turnover vehicle handle is arranged on the front side of the upper layer of the aluminum profile framework.
[0014] The beneficial effects of the present application are:
[0015] The structure is unique, through the cooperation of the cabinet, the reversing tool, the testing device, the high and low temperature and humidity test box, and the 2000A current source, 300 products can be tested at a time, and automatic testing can be realized by relying on the program, so that the production capacity is effectively improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic view of the present application.
[0017] Figure 2 is a schematic view of the test cabinet in the present application.
[0018] Figure 3 is a schematic view of the main control board in the test cabinet.
[0019] Figure 4 is a schematic view of the adapter board in the test cabinet.
[0020] Figure 5 is a schematic view of the current reversing tool in the application.
[0021] Figure 6 is a circuit schematic diagram of the current reversing tool.
[0022] Figure 7 is a schematic view of the testing device in the present application.
[0023] Figure 8 is a single-layer plan view of the testing tool in the testing device. DETAILED DESCRIPTION
[0024] The present application will be further illustrated in conjunction with the drawings and specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present application and not to limit the scope of the present application.
[0025] As shown in the drawings, a testing system for a current sensor is composed of a test cabinet (100), a current reversing tool (200), a 2000A current source (300), a testing device (400), and a high and low temperature and humidity test box (500); wherein the test cabinet (100) is connected with the current reversing tool (200), the 2000A current source (300), the testing device (400), and the high and low temperature and humidity test box (500), the 2000A current source (300) is connected with the current reversing tool (200), and the current reversing tool (200) is connected with the testing device (400).
[0026] In the embodiment, the current commutation tool (200) is connected with the test cabinet (100) through the 485 communication 1 bus (600), the 2000A current source (300) is connected with the test cabinet (100) through the 485 communication 2 bus (700), the test device (400) is connected with the test cabinet (100) through the CAN signal bus (800), the high and low temperature and humidity test box (500) is connected with the test cabinet (100) through the 485 communication 3 bus (900), the 2000A current source (300) is connected with the current commutation tool (200) through the first 120 square millimeter cable line (1000), and the current commutation tool (200) is connected with the test device (400) through the second 120 square millimeter cable line (1100).
[0027] The working steps of the application are:
[0028] 1) Open the test software, put 300 products into the test device at a time, scan the code to input the product serial number, connect the product communication harness, string into the copper bar, and lock the copper bar end fixing screws.
[0029] 2) Push the test device into the high and low temperature and humidity test box, connect the test device with the 120 square millimeter cable line, and close the high and low temperature and humidity test box door.
[0030] 3) Click start running on the test software.
[0031] 4) The test cabinet, current commutation tool, 2000A current source, high and low temperature and humidity test box realize automatic switching of current gear, automatic switching of current direction, automatic switching of temperature, automatic data acquisition, and automatic calibration test through instructions.
[0032] 5) The test system automatically stops after 300 tests are completed.
[0033] In the embodiment, the test cabinet comprises a box (1-3) and a main control board (1-1), a switching board (1-2), an industrial computer (1-4) and a switch (1-5) arranged in the box (1-3); the switching board (1-2) is provided with two product interface ends (1-10) arranged symmetrically left and right for connecting products, and two first network ports (1-9) arranged symmetrically left and right, the main control board (1-1) is provided with three second network ports (1-8), two of which are connected with the two first network ports (1-9) respectively (the network ports on the main control board (1-1) and the switching board (1-2) are in one-to-one correspondence), the main control board (1-1) is further provided with a power input port (1-6) for connecting with a power supply and a third network port (1-7) for connecting with the switch (1-5), and the switch (1-5) is connected with the industrial computer (1-4); the main control board (1-1) is multiple and evenly distributed in multiple layers in the box (1-3); the switching board (1-2) is multiple and evenly distributed in multiple layers in the box (1-3); the industrial computer (1-4) and the switch (1-5) are arranged at the bottom of the box (1-3).
[0034] In the embodiment, two 2000A AC contactors are 2000A AC contactor one (501) and 2000A AC contactor two (502) arranged left and right, respectively, four top corner end contact points of the 2000A AC contactor one are positive A (1), negative B (2), output D (4) and output C (3) in clockwise direction from the upper left corner, four top corner ends of the 2000A AC contactor two are positive E (5), negative F (6), output H (8) and output G (7) in clockwise direction from the upper left corner, wherein the positive A and the positive E are connected by a red copper connecting block, the negative B and the negative F are connected by a red copper connecting block, the output D and the output G are connected by a red copper connecting block, and the output C and the output H are connected by a red copper connecting block.
[0035] In the embodiment, two 50A AC contactors are respectively 50A AC contactor one (301) and 50A AC contactor two (302) arranged left and right, the first and third contact points from left to right at the top of the 50A AC contactor one are positive pole I (9) and negative pole J (10) respectively, the first and third contact points from left to right at the bottom of the 50A AC contactor one are output end K (11) and output end L (12) respectively, the first and third contact points from left to right at the top of the 50A AC contactor two are positive pole M (13) and negative pole N (14) respectively, the first and third contact points from left to right at the bottom of the 50A AC contactor two are output end O (15) and output end P (16) respectively, the positive pole I and the positive pole M are connected through a red copper connecting block, the negative pole J and the negative pole N are connected through a red copper connecting block, the output end L and the output end O are connected through a red copper connecting block, and the output end K and the output end P are connected through a red copper connecting block.
[0036] In the embodiment, the output end K and the output end L of the 50A AC contactor one are connected to the output end C and the output end D of the 2000A AC contactor one respectively, and the output end K and the output end L of the 50A AC contactor one are also connected to the test device (110) respectively.
[0037] In the embodiment, the relay switch is connected to the 2000A current source (100), and the output current greater than 20A in the 2000A current source is input to the 2000A AC contactor one, and the output current not greater than 20A is input to the 50A AC contactor one.
[0038] In the embodiment, the 485 module is connected to the host computer (90).
[0039] The working steps of the application are as follows:
[0040] 1) When the output current of the 2000A constant current source is less than or equal to 20A: the current direction is changed through the 50A AC contactor output. The host computer gives an instruction to the 485 module, so that the 50A AC contactor is opened and closed to realize the current direction switching of the output end C and the output end D. The positive pole I of the 50A AC contactor one is connected to the positive pole of the current source, the negative pole J is connected to the negative pole of the current source, the 485 module receives instruction "A", the 50A AC contactor one is attracted, the output end C is the positive pole and the output end D is the negative pole. The 485 module receives instruction "B", the 50A AC contactor one is disconnected, the 50A AC contactor two is attracted, the output end C is the negative pole and the output end D is the positive pole. Thus the current commutation is realized.
[0041] 2): When the output current of the 2000A constant current source is greater than 20A: the current direction is changed by the 2000A AC contactor output. The host computer gives the 485 module a command to make the 2000A AC contactor open and close, realizing the switching of the current direction of the output end C and the output end D. The positive electrode A of the 2000A AC contactor one is connected to the positive electrode of the current source, the negative electrode B is connected to the negative electrode of the current source, and the 485 module receives the command "C". The 2000A AC contactor one is attracted, the output end C is the positive electrode, and the output end D is the negative electrode. The 485 module receives the command "D". The 2000A AC contactor one is disconnected, the 2000A AC contactor two is attracted, the output end C is the negative electrode, and the output end D is the positive electrode. Thus, the current commutation is realized.
[0042] The 50A AC contactor and the 2000A AC contactor are connected through the normally closed contact to realize interlocking, preventing the contactor from being opened at the same time and causing damage to the equipment.
[0043] In the embodiment, the test device comprises a test tool and a turnover vehicle, wherein the test tool is used for testing the product (2-8) to be tested in the cavity of the high-low temperature test box, and the turnover vehicle is used for carrying the test tool sliding out of the cavity of the high-low temperature test box; the test tool comprises an aluminum alloy framework (2-1), the aluminum alloy framework (2-1) is a three-layer frame structure, each layer is provided with an FR-4 support base (2-2) and a main plate (2-3), a tool pulley (2-4) is assembled at the bottom, the main plate (2-3) is a rectangular plate and is arranged in the middle of the top surface of the FR-4 support base (2-2), six transversely arranged copper connecting rods (2-5) are arranged in front of the main plate (2-3) from front to back, three middle copper connecting blocks (2-6) are arranged on the left side of the FR-4 support base (2-2) in the longitudinal direction, two middle copper connecting blocks (2-6) and two end copper connecting blocks (2-7) are arranged on the right side of the FR-4 support base (2-2) in the longitudinal direction, wherein the middle copper connecting blocks (2-6) and the end copper connecting blocks (2-7) are connected with the end of the copper connecting rod (2-5), the copper connecting rod (2-5) is provided with the product (2-8) to be tested, four-pole connectors (2-9) corresponding in position and same in number as the product (2-8) to be tested are welded on the top surface of the main plate (2-3) and used for connecting with the product (2-8) to be tested, a 100P connector (2-10) used for connecting with the upper computer is further welded on the top surface of the main plate (2-3), and a bottom rail (2-11) for sliding of the tool pulley (2-4) is arranged at the bottom of the cavity of the high-low temperature test box; a top rail (2-12) for sliding of the tool pulley (2-4) is arranged at the top of the turnover vehicle.
[0044] Two middle copper connecting blocks (2-6) on the right side of the FR-4 support base (2-2) are located between two end copper connecting blocks (2-7), five middle copper connecting blocks (2-6) on both sides of the FR-4 support base (2-2) are connected in sequence with six copper connecting rods (2-5), and the two end copper connecting blocks (2-7) are connected with the right ends of the frontmost and rearmost copper connecting rods (2-5), wherein the end copper connecting blocks (2-7) on the front side of the upper and middle layers are connected through the upper and lower copper connecting blocks (2-13), the end copper connecting blocks (2-7) on the rear side of the middle and lower layers are connected through the upper and lower copper connecting blocks (2-13), and a connected electric circuit is formed; the upper side of the aluminum alloy framework (2-1) is provided with a test tool handle (2-14); the turnover vehicle comprises an aluminum profile framework (2-15), the aluminum profile framework (2-15) is a three-layer frame structure, the upper and middle layers are respectively provided with an upper layer partition plate (2-16) and a middle layer partition plate (2-17), and the bottom is provided with a turnover vehicle pulley (2-18); the upper side of the aluminum profile framework (2-15) is provided with a turnover vehicle handle (2-19).
[0045] The test steps are:
[0046] 1. 300 products are connected in sequence into the copper connecting rods, and the copper connecting rods are installed on the copper connecting blocks.
[0047] 2. The 4P connector is connected with the products.
[0048] 3. The 100P connector is connected with the host computer.
[0049] 4. The test tool is pushed into the cavity of the high-low temperature test box through the top rail and the bottom rail, and the test is started.
[0050] The technical means disclosed in the scheme of the utility model is not only limited to the technical means disclosed in the above-mentioned embodiments, but also includes the technical scheme composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the technical field, without departing from the principle of the utility model, some improvements and refinements can be made, and these improvements and refinements are also regarded as the protection range of the utility model.
Claims
1. A test system for a current sensor, characterized by, The test cabinet, the current reversing tool, the 2000A current source, the test device and the high-low temperature and humidity test box are connected.
2. A test system for a current sensor according to claim 1, characterized in that, The current reversing tool and the test cabinet are connected through a 485 communication 1 bus, the 2000A current source and the test cabinet are connected through a 485 communication 2 bus, the test device and the test cabinet are connected through a CAN signal bus, the high-low temperature and humidity test box and the test cabinet are connected through a 485 communication 3 bus, the 2000A current source and the current reversing tool are connected through a 120 square millimeter cable, and the current reversing tool and the test device are connected through a 120 square millimeter cable.
3. The test system for a current sensor of claim 1, wherein, The test cabinet comprises a cabinet body and main control boards, adapter boards, industrial computers and switches arranged in the cabinet body; two left-right symmetrical product interface ends are arranged on the adapter boards for connecting eight products, and two left-right symmetrical first network ports are arranged on the adapter boards; three second network ports are arranged on the main control boards, two of which are connected with the two first network ports respectively, a power input port for connecting with a power supply and a third network port for connecting with the switch are arranged on the main control boards, and the switch is connected with the industrial computer; the main control boards are arranged in multiple layers in the cabinet body, the adapter boards are arranged in multiple layers in the cabinet body, and the industrial computer and the switch are arranged at the bottom of the cabinet body.
4. The test system for a current sensor of claim 1, wherein, The current reversing tool comprises an outer cabinet body with an open front side, mounting rails are arranged on both sides of the inner cavity of the outer cabinet body, a bottom plate is arranged between the two mounting rails, a relay switch, a 485 module and two left-right arranged 50A AC contactors are arranged on the upper part of the front side of the bottom plate, two left-right arranged 2000A AC contactors are arranged on the lower part of the front side of the bottom plate, the relay switch supplies power to the 485 module, the 50A AC contactors and the 2000A AC contactors, and the contact points of the two 50A AC contactors and the contact points of the two 2000A AC contactors are connected together through purple copper connecting blocks respectively.
5. A test system for a current sensor according to claim 4, characterized in that, Two 2000A AC contactors are respectively left and right 2000A AC contactor one and 2000A AC contactor two, four top corner end contact points of the 2000A AC contactor one are positive A, negative B, output D and output C in clockwise direction from the upper left corner, four top corner ends of the 2000A AC contactor two are positive E, negative F, output H and output G in clockwise direction from the upper left corner, wherein, the positive A and the positive E are connected through the red copper connecting block, the negative B and the negative F are connected through the red copper connecting block, the output D and the output G are connected through the red copper connecting block, the output C and the output H are connected through the red copper connecting block;Two 50A AC contactors are respectively left and right 50A AC contactor one and 50A AC contactor two, the first and third contact points from left to right on the top of the 50A AC contactor one are positive I and negative J, the first and third contact points from left to right on the bottom are output K and output L, the first and third contact points from left to right on the top of the 50A AC contactor two are positive M and negative N, the first and third contact points from left to right on the bottom are output O and output P, the positive I and the positive M are connected through the red copper connecting block, the negative J and the negative N are connected through the red copper connecting block, the output L and the output O are connected through the red copper connecting block, the output K and the output P are connected through the red copper connecting block.
6. A test system for a current sensor according to claim 5, characterized in that, The output K and the output L of the 50A AC contactor one are connected to the output C and the output D of the 2000A AC contactor one, the output K and the output L of the 50A AC contactor one are also connected to the test device respectively;The relay switch is connected to the 2000A current source, the output current greater than 20A in the 2000A current source is input to the 2000A AC contactor one, the output current not greater than 20A is input to the 50A AC contactor one;The 485 module is connected to the host computer.
7. The test system for a current sensor of claim 1, wherein, The test device comprises a test tool and a turnover vehicle, wherein the test tool is used for testing a product to be tested in a cavity of a high-low temperature test box, and the turnover vehicle is used for carrying the test tool sliding out of the cavity of the high-low temperature test box, wherein the product to be tested is a current sensor; the test tool comprises an aluminum alloy framework, which is a three-layer frame structure, each layer of which is provided with an FR-4 support base and a main plate, and the bottom is provided with a tool pulley; the main plate is a rectangular plate and is arranged in the middle of the top surface of the FR-4 support base; six horizontal copper connecting rods are arranged in front of the main plate from front to back; three middle copper connecting blocks are arranged on the left side of the FR-4 support base in the longitudinal direction; two middle copper connecting blocks and two end copper connecting blocks are arranged on the right side of the FR-4 support base in the longitudinal direction; the middle copper connecting blocks and the end copper connecting blocks are connected with the ends of the copper connecting rods; the current sensor is connected with the copper connecting rods; four P connectors corresponding in position to the number of the current sensor are welded on the top surface of the main plate and are used for connecting with the current sensor; a 100P connector used for connecting with an upper computer is also welded on the rear side of the top surface of the main plate; and the cavity of the high-low temperature test box is provided with a bottom rail for the tool pulley to slide.
8. A test system for a current sensor according to claim 7, characterized in that, The two middle copper connecting blocks on the right side of the FR-4 support base are located between the two end copper connecting blocks; the five middle copper connecting blocks on the two sides of the FR-4 support base sequentially connect the six copper connecting rods; the two end copper connecting blocks are connected with the right ends of the frontmost and rearmost copper connecting rods, respectively; the end copper connecting blocks on the front side of the upper and middle layers are connected through the upper and lower copper connecting blocks, and the end copper connecting blocks on the rear side of the middle and lower layers are connected through the upper and lower copper connecting blocks, thereby forming a connected electric circuit; the aluminum alloy framework is provided with a test tool handle on the front side of the upper layer; the turnover vehicle comprises an aluminum profile framework, which is a three-layer frame structure, and is provided with an upper partition plate and a middle partition plate on the upper and middle layers, respectively, and a turnover vehicle pulley at the bottom; the turnover vehicle is provided with a turnover vehicle handle on the front side of the upper layer.