Power converter detection device and test system

Abstract

According to the power converter detection device and the test system provided by the invention, the test mechanism, the pick-and-place mechanism and the power supply test module placing and positioning mechanism are arranged on the rack, and the pick-and-place mechanism is arranged, so that manual feeding and discharging are not needed; an ejection mechanism on the power supply test module placing and positioning mechanism lifts the power supply test module so that the power supply test module can be separated from the power supply test module placing and positioning mechanism to be conveniently sucked by the taking and placing mechanism, and the power supply test module placing and positioning mechanism is provided with a plurality of placing units used for placing the power supply test module. A plurality of power supply test modules can be tested at the same time, so that the test efficiency is improved, a plate spring on a power supply test module placement positioning mechanism pushes the power supply test modules to be flush with the inner wall of a second limiting plate, the power supply test modules are prevented from moving, the power supply test modules do not need to be pressed manually all the time, and instability of manual pressing can also be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power converter testing, and in particular to a power converter detection device and a testing system. Background Art

[0002] A power converter is a device that converts electrical energy into the voltage or current required by electrical equipment. The internal structure of a power converter usually includes core components such as a communication interface, switch, transformer, diode, inductor and capacitor. These components work together to achieve the function of voltage or current conversion. The transformer is the core component of the power converter, which is mainly used to increase or decrease the voltage or current; the communication interface is used for communication detection of the power converter; switches and capacitors are one of the most critical components of the power converter, which are used to import electrical energy into the converter circuit and transform it as needed; inductors are used in the switch tube to adjust and control current changes, store energy, etc.

[0003] For example, a mobile phone charger converts 220V AC power into 5V DC power. Power converters are now more and more widely used. With the development of science and technology, the demand for power converters is increasing. Various types of power converters have emerged in response to market demand. In the production process of power converters, test tools are needed to test whether the input voltage, output voltage, output current, output frequency and other parameters of the power converter are consistent with the requirements of the equipment to ensure that the power converters shipped from the factory meet the standard requirements.

[0004] Chinese invention patent CN112255459A, published on 20210122, discloses a detection device for a DC-DC converter of a new energy vehicle, including a base plate, a slider control unit, an insulation detection unit, a spray unit and a vibration detection unit; base plate: a fixed block is fixedly connected to the front side of the upper surface, and there are two fixed blocks that are evenly distributed. A threaded shaft is rotatably connected to the fixed block on the left, and the right end of the threaded shaft passes through the fixed block on the right, and a coupling is fixedly sleeved on the right end of the threaded shaft. A motor is installed on the right end of the upper surface of the base plate, and the output shaft of the motor is fixedly sleeved on the right part of the coupling. A movable block is slidably connected to the front side of the upper surface of the base plate, and a threaded hole is opened on the movable block and the threaded hole is threadedly connected to the threaded shaft, and a telescopic column is fixedly connected to the upper end of the movable block; when the detection device for the DC-DC converter of a new energy vehicle is used, the detection process is simple, the detection result is accurate, manpower is saved, and the detection efficiency is high.

[0005] However, the detection device can only detect one converter to be detected at a time, resulting in reduced overall practicality and detection efficiency.

[0006] Therefore, there is a need for a testing device that can test multiple power converters at one time and distinguish between qualified and unqualified power converters, and a related automated testing system. Summary of the invention

[0007] In order to solve the problems existing in the technical background, the present invention proposes a power converter test fixture and a test system, and the specific technical solution is as follows:

[0008] A power converter detection device comprises a first adjustment block, a second adjustment block, a test mechanism, a pick-and-place mechanism, a positioning mechanism and a frame, wherein the test mechanism, the pick-and-place mechanism and the positioning mechanism are arranged on the frame;

[0009] In some embodiments of the present invention, the frame includes a support rod, an operating table and a longitudinal slide rail, the support rods are arranged on both sides of the horizontal operating table and several are arranged along the axial direction of the operating table; longitudinal slide rails are arranged on the tops of the support rods on both sides of the operating table, and sliding blocks that can slide on the slide rails are arranged on the longitudinal slide rails, and a transverse slide rail is connected between two opposite sliding blocks; a first adjustment block and a second adjustment block are respectively arranged on the two transverse slide rails, a testing mechanism is arranged under the first adjustment block, and a pick-up and placement mechanism is arranged under the second adjustment block.

[0010] In some embodiments of the present invention, the positioning mechanism is fixedly mounted on a horizontal operating table, and the positioning mechanism includes a placement plate and a plurality of placement units; the placement unit is used to place a power converter, and the placement unit includes a leaf spring, a first limit plate, a power converter, an ejection mechanism, a second limit plate and an arc-shaped notch; the first limit plate and the second limit plate are both "L"-shaped plates, and the first limit plate and the second limit plate are arranged on both sides of the diagonal of the power test module to limit the power test module in the empty area formed by the first limit plate and the second limit plate; the leaf spring and the side walls at both ends of the first limit plate are respectively connected, and a corner of the power converter is aligned with the second limit plate through the elastic force of the leaf spring; an arc-shaped notch is opened on the inner side of the second limit plate, so as to prevent a corner of the power converter from contacting the second limit plate and preventing a corner of the power converter from colliding with the second limit plate.

[0011] In some embodiments of the present invention, an ejection structure is provided under each power converter corresponding to the positioning mechanism. The ejection mechanism is an electric lifter, which uses an electric motor as a power source and relies on a transmission mechanism to achieve lifting and lowering, thereby lifting the power test module away from the power test module and placing it in the positioning mechanism for easy absorption by the pick-and-place mechanism.

[0012] In some embodiments of the present invention, the testing mechanism is used to test a plurality of power converters to be tested placed on the positioning mechanism, and after the test is completed, the power converters are sucked and transported to a designated position by the pick-and-place mechanism.

[0013] In some embodiments of the present invention, the testing mechanism includes a first base plate and a testing unit, and multiple testing units are arranged under the first base plate, and the testing units correspond one by one to multiple power converters placed on the positioning mechanism; each of the testing units also includes a test circuit board, pins, probes and a communication test interface, the probes are connected to the pins and the communication test interface, and the pins are connected to the test circuit board.

[0014] In some embodiments of the present invention, the pick-and-place mechanism includes a second base plate and a pick-and-place unit, a plurality of pick-and-place units are arranged under the second base plate, and each of the pick-and-place units corresponds one-to-one to a plurality of power converters placed on the positioning mechanism; the pick-and-place unit is an electric suction cup.

[0015] In some embodiments of the present invention, the support rod, the operating table and the longitudinal slide rail are overall in an "H" shape.

[0016] In some embodiments of the present invention, the operating table is an insulating operating table.

[0017] A power converter test system comprises a control module, a PC terminal, a display module and a connecting line.

[0018] In some embodiments of the present invention, the control module is connected to the testing mechanism and the picking and placing mechanism, the communication setting interface of the power converter is connected to the PC end through a connecting line, the display module is used to display the test data during the testing process, and the control module compares the test result parameters of the power converter with the standard parameters of the power converter to determine whether the power converter is qualified.

[0019] Furthermore, the control module is an STM32 microcontroller to achieve control over the entire system.

[0020] In some embodiments of the present invention, the power converter is divided into qualified and unqualified after being tested by a power converter test system. Qualified products are first moved upward and out of the placement unit by the upward force of the ejection mechanism, and then the pick-and-place mechanism moves to the top of the power test module, and then the electric suction cup sucks it and places it in a designated position; unqualified products are then moved upward and out of the placement unit by the upward force of the ejection mechanism, and then the pick-and-place mechanism moves to the top of the power test module, and then the electric suction cup sucks it and places it in a designated position.

[0021] The above technical solution has the following beneficial effects:

[0022] The present invention arranges a testing mechanism, a pick-and-place mechanism, and a positioning mechanism on a frame; when the test is completed, the ejection mechanism of the positioning mechanism lifts up the power converter so that the power converter is removed from the placement unit, which is convenient for the pick-and-place mechanism to absorb; at the same time, the positioning mechanism is provided with a plurality of placement units for placing the power converter, and a plurality of power converters can be tested at the same time, thereby improving the test efficiency; the leaf spring on the positioning mechanism of the present invention pushes the power converter to be flush with the inner wall of the second limit plate to prevent the power converter from moving, and there is no need to manually press the power test module all the time, thereby avoiding the instability of manual pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural axial view of a power converter test fixture of the present invention;

[0024] Figure 2 A front view of the structure of a power converter testing tool of the present invention;

[0025] Figure 3 A rear view of the structure of a power converter testing tool of the present invention;

[0026] Figure 4 It is a structural schematic diagram of a power converter test fixture positioning mechanism of the present invention;

[0027] Figure 5 for Figure 4 A magnified schematic diagram of part A in FIG.

[0028] Figure 6 It is a structural schematic diagram of a test unit of a power converter test fixture and a test mechanism of the present invention;

[0029] Figure 7 It is a structural schematic diagram of a second adjustment block of a power converter test fixture and a test system of the present invention;

[0030] Reference numerals

[0031] 1- Testing organization;

[0032] 11-first adjustment block; 12-first base plate; 13-test unit;

[0033] 131 - test circuit board; 132 - pin; 133 - probe; 134 - communication test interface.

[0034] 2-pick-and-place mechanism;

[0035] 21 - second adjustment block; 22 - second bottom plate; 23 - pick-and-place unit; 24 - through hole; 25 - vertical support rod; 26 - horizontal slide rail.

[0036] 3- Positioning mechanism;

[0037] 31-placement unit; 32-placement board;

[0038] 311 - leaf spring; 312 - first limit plate; 313 - power converter; 314 - ejection mechanism; 315 - second limit plate; 316 - arc-shaped notch.

[0039] 4- rack;

[0040] 41-support rod; 42-operating platform.

[0041] 5-Longitudinal slide rail.

[0042] 6- Slider block. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative efforts are within the scope of protection of the present invention.

[0045] like Figure 1-Figure 3 As shown, a power converter detection device according to the present invention includes a testing mechanism 1, a first adjustment block 11, a second adjustment block 21, a pick-and-place mechanism 2, a positioning mechanism 3 and a rack 4, wherein the testing mechanism 1, the pick-and-place mechanism 2, and the power test module placement positioning mechanism 3 are arranged on the rack 4.

[0046] In some embodiments of the present invention, the rack 4 includes a support rod 41, an operating table 42 and a longitudinal slide rail 5, wherein the support rod 41 is arranged on both sides of the horizontal operating table 42 and a plurality of support rods 41 are arranged along the axial direction of the operating table 42, and longitudinal slide rails 5 are arranged on the tops of the support rods 41 on both sides of the operating table 42, and each of the longitudinal slide rails 5 is provided with a sliding block 6 that can slide on the slide rail, and a transverse slide rail 26 is connected between two opposing sliding blocks 6, and a power supply test module placement and positioning mechanism 3 is provided on the horizontal operating table 42, and a first adjustment block 11 and a second adjustment block 21 are respectively provided on the two transverse slide rails 26, a test mechanism 1 is provided below the first adjustment block 11, and a pick-and-place mechanism 2 is provided below the second adjustment block 21, and the test mechanism 1 is used to test a plurality of power converters 313 to be tested placed on the power supply test module placement and positioning mechanism 3, and after the test is completed, the power converter 313 is sucked and transported to a designated position by the pick-and-place mechanism 2;

[0047] Therefore, the power converter testing tool of this embodiment can test multiple power converters at one time, thereby improving the testing efficiency.

[0048] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the positioning mechanism 3 includes a placement plate 32 and a plurality of placement units 31, and the placement unit 31 includes a leaf spring 311, a first limiting plate 312, a power converter 313, an ejection mechanism 314, a second limiting plate 315 and an arc-shaped notch 316. The first limiting plate 312 and the second limiting plate 315 are both "L"-shaped plates. The first limiting plate 312 and the second limiting plate 315 are arranged on both sides of the diagonal of the power test module to limit the power test module in the empty area formed by the first limiting plate 312 and the second limiting plate 315. The side walls at both ends of the first limiting plate 312 are respectively provided with leaf springs 311, and one corner of the power test module is aligned with the second limiting plate 315 through the elastic force of the leaf spring 311; the inner side of the second limiting plate 315 is provided with an arc-shaped notch 316, thereby preventing one corner of the power test module 313 from contacting the second limiting plate 315, thereby playing a protective role.

[0049] In some embodiments of the present invention, Figure 4 As shown, the size of the placement unit 31 is 200 mm*200 mm. Specifically, placement units 31 of different specifications can be designed according to the specifications of the power converter to meet the placement of power converters of different sizes.

[0050] Preferably, the placement units 31 on the power test module placement and positioning mechanism 3 are provided with 9 which can simultaneously place 9 power test modules 313 for testing.

[0051] Therefore, the leaf spring on the positioning mechanism of the power converter test tool of the present embodiment pushes the power converter to be flush with the inner wall of the second limit plate to prevent the power converter from moving. There is no need to manually press the power test module all the time, thus avoiding the instability of manual pressing. Multiple placement units of different specifications can adapt to multiple power converters of different sizes, ensuring the versatility of the power converter test tool of the present embodiment and improving detection efficiency.

[0052] In some embodiments of the present invention, Figure 3 and Figure 6 As shown, the test mechanism 1 includes a first base plate 12 and a test unit 13, and a plurality of test units 13 are arranged under the first base plate 12. Each of the test units 13 corresponds one-to-one to a plurality of power test modules 313 placed on the power test module placement and positioning mechanism 3. Each of the test units 13 also includes a test circuit board 131, a pin 132, a probe 133 and a communication test interface 134. The probe 133 is connected to the pin 132 and the communication test interface 134, and the pin 132 is connected to the test circuit board 131.

[0053] In some embodiments of the present invention, Figure 2 As shown, the pick-and-place mechanism 2 includes a second base plate 22 and a pick-and-place unit 23. A plurality of pick-and-place units 23 are arranged below the second base plate 22. Each of the pick-and-place units 23 corresponds one-to-one to a plurality of power converters 313 placed on the positioning mechanism 3. The pick-and-place unit 23 is an electric suction cup. An ejection structure is arranged below each power converter 313 corresponding to the power test module placement positioning mechanism 3. The ejection mechanism 314 is an electric lifter, which uses an electric motor as a power source and relies on a transmission mechanism to achieve lifting and lowering, thereby lifting the power converter 313 out of the power test module placement positioning mechanism 3 to facilitate the pick-and-place mechanism 2 to absorb it.

[0054] Therefore, the power converter test tool of this embodiment can automatically complete the absorption of the power converter, thereby improving the automation level and work efficiency.

[0055] In some embodiments of the present invention, Figure 7As shown, the first adjusting block 11 and the second adjusting block 21 have the same structure, both are connected to the transverse slide rail 26 and move left and right along the transverse slide rail 26, sliding blocks 6 are provided on both sides of the transverse slide rail 26, and the sliding blocks 6 are provided on the longitudinal slide rail 5. The sliding blocks 6 drive the transverse slide rail 26 to move forward and backward in the length direction of the longitudinal slide rail 5, and the cooperation of the first adjusting block 11, the second adjusting block 21 and the sliding block 6 drives the left and right and front and back movements of the test mechanism 1 and the pick-and-place mechanism 2. The side walls of the first adjusting block 11 and the second adjusting block 21 are provided with vertical support rods 4125, and the test mechanism 1 and the pick-and-place mechanism 2 are connected to the vertical support rods 4125 and move up and down on the vertical support rods 4125. The first adjusting block 11 and the second adjusting block 21 are provided with through holes 24 to allow the transverse slide rail 26 to pass through.

[0056] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the support rod 41, the operating table 42 and the longitudinal slide rail 5 of the power converter test fixture are in an "H" shape as a whole, and the operating table 42 is an insulating operating table 42;

[0057] Preferably, the size of the operating table 42 in this embodiment is 1.5-2.5m, and the first adjustment block 11 and the second adjustment block 21 drive the test mechanism and the pick-and-place mechanism 2 to move in a range of 10-30cm; preferably, the height of the rack in this embodiment is 1-1.5m.

[0058] Therefore, the power converter testing tool of this embodiment has high stability and the operating table 42 has good safety.

[0059] A test system for a power supply test fixture according to the present invention comprises the above-mentioned power converter test fixture, a control module, a PC terminal, a display module, and a connecting line;

[0060] In some embodiments of the present invention, the control module is connected to the test mechanism 1 and the pick-and-place mechanism 2, the communication setting interface of the test unit 13 is connected to the PC end through a line, the display module in the PC end is used to display the test data during the test process, and the control module compares the test result parameters fed back by the test unit 13 with the power supply test standard parameters to determine whether the power supply test module 313 is qualified; specifically, the control module is STM32 as a microcontroller, which mainly realizes the control of the entire system.

[0061] Therefore, the testing system of the power supply testing tool of the present invention can automatically test the power converter with detection function and distinguish qualified products from unqualified products.

[0062] In some embodiments of the present invention, when used, the power supply test fixture places the power converter 313 to be tested on the placement unit 31 through the pick-and-place mechanism 2, and moves the power supply test module 313 to a corner of the second limit plate 315 through the elastic force of the two leaf springs 311, and the edge of the power supply test module 313 is aligned with the inner wall of the second limit plate 315. After the test mechanism 1 moves to the top of the power supply test module placement positioning mechanism 3, it gradually moves downward so that the probe 133 contacts the power converter 313 to be tested for testing, and the test result is displayed on the PC end connected thereto;

[0063] Specifically, the power converter 313 after the test is divided into two types, unqualified and qualified. The qualified products and the unqualified products are separately sucked and placed by the pick-and-place mechanism 2 to prevent confusion. The qualified products are first moved upward and out of the placement unit 31 by the upward force of the ejection mechanism 314, and the pick-and-place mechanism 2 is moved to the top of the power test module 313, and then the electric suction cup is sucked and placed at the designated position; the unqualified products are then moved upward and out of the placement unit 31 by the upward force of the ejection mechanism 314, and the pick-and-place mechanism 2 is moved to the top of the power converter 313, and then the electric suction cup is sucked and placed at the designated position.

[0064] In some embodiments of the present invention, specifically, taking the air-conditioning power supply as an example, a functional test is performed on the PCBA in the power supply test module 313. The power supply includes a power supply test port, multiple communication ports, and multiple temperature sensor ports. During the test, the test is performed by contacting the test probe 133 on the test mechanism 1 to each port; when testing other power supplies, different wire connections can be designed on the test mechanism 1 according to the arrangement of the power supply to be tested to perform the test.

[0065] In some embodiments of the present invention, see Figure 1 As shown, the present invention arranges a test mechanism 1, a pick-and-place mechanism 2, and a power supply test module placement and positioning mechanism 3 on a frame 4. By arranging the pick-and-place mechanism 2, manual loading and unloading is unnecessary, thereby improving work efficiency.

[0066] In summary, a power converter test fixture and a test system of the present invention can ensure that relevant problems of power converter detection during mass production can be fed back to meet the test requirements.

[0067] It is worth noting that the control module selects STM32 microcontroller to control the test mechanism and the pick-and-place mechanism, the PC displays the test results of the control module, the test unit of the test mechanism, the electric suction cup of the pick-and-place unit, the electric lifter of the ejection mechanism, the motor, and the transmission mechanism all adopt methods commonly used in the prior art.

[0068] The basic principles and main features of the present invention are described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. A power converter detection device, comprising a testing mechanism, a pick-and-place mechanism, and a rack, characterized in that: It also includes a first adjustment block, a second adjustment block, and a positioning mechanism, wherein the testing mechanism, the picking and placing mechanism, and the positioning mechanism are arranged on the frame; The frame includes a support rod, an operating table and a longitudinal slide rail, wherein the support rods are arranged on both sides of the horizontal operating table and are arranged in a plurality along the axial direction of the operating table; longitudinal slide rails are arranged on the tops of the support rods on both sides of the operating table, and sliding blocks that can slide on the slide rails are arranged on the longitudinal slide rails, and a transverse slide rail is connected between two opposite sliding blocks; a first adjustment block and a second adjustment block are respectively arranged on the two transverse slide rails, a testing mechanism is arranged below the first adjustment block, and a pick-and-place mechanism is arranged below the second adjustment block; The positioning mechanism is fixedly mounted on a horizontal operating table, and the positioning mechanism includes a placement plate and a plurality of placement units; the placement unit is used to place a power converter, and the placement unit includes a leaf spring, a first limit plate, a power converter, an ejection mechanism, a second limit plate and an arc-shaped notch; the first limit plate and the second limit plate are both "L"-shaped plates, and the first limit plate and the second limit plate are arranged on both sides of the diagonal of the power test module to limit the power test module in the empty area formed by the first limit plate and the second limit plate; the leaf spring and the side walls at both ends of the first limit plate are respectively connected, and a corner of the power converter is aligned with the second limit plate through the elastic force of the leaf spring; an arc-shaped notch is provided on the inner side of the second limit plate; An ejection structure is provided under each power converter corresponding to the positioning mechanism. The ejection mechanism is an electric lifter, which uses an electric motor as a power source and relies on a transmission mechanism to achieve lifting and lowering, thereby lifting the power test module out of the power test module placement positioning mechanism to facilitate the pick-and-place mechanism to absorb it.

2. A power converter detection device according to claim 1, characterized in that: The testing mechanism is used to test a plurality of power converters to be tested placed on the positioning mechanism, and after the test is completed, the power converters are sucked and transported to a designated position by the pick-and-place mechanism; The testing mechanism includes a first base plate and a testing unit, and multiple testing units are arranged under the first base plate. The testing units correspond one-to-one to multiple power converters placed on the positioning mechanism; each of the testing units includes a testing circuit board, pins, probes and a communication testing interface, the probes are connected to the pins and the communication testing interface, and the pins are connected to the testing circuit board.

3. A power converter detection device according to claim 1, characterized in that: The pick-and-place mechanism includes a second base plate and a pick-and-place unit. A plurality of pick-and-place units are arranged below the second base plate. Each of the pick-and-place units corresponds one-to-one to a plurality of power converters placed on the positioning mechanism. The pick-and-place unit is an electric suction cup.

4. The power converter detection device according to claim 1, characterized in that: The support rod, the operating table and the longitudinal slide rail are in an "H" shape as a whole.

5. The power converter detection device according to claim 1, characterized in that: The operating table is an insulating operating table.

6. A power converter test system, characterized in that: include: The power converter test fixture, control module, PC terminal, display module, and connecting circuits described in claims 1-5; The control module is connected to the testing mechanism and the pick-and-place mechanism, the communication interface of the testing unit is connected to the PC end through a connecting line, the display module is used to display the test data during the test process, and the control module compares the test result parameters of the power converter with the standard parameters of the power converter to determine whether the power converter is qualified.

7. The power converter test system according to claim 6, wherein: The control module is an STM32 microcontroller, which realizes the control of the entire system.

8. The power converter test fixture and test system according to claims 1-6, characterized in that: The power converter is divided into qualified and unqualified after being tested by the power converter test system. Qualified products are first moved upward and out of the placement unit by the upward force of the ejection mechanism, and the pick-and-place mechanism moves to the top of the power test module, and then is sucked by the electric suction cup and placed in the designated position; unqualified products are then moved upward and out of the placement unit by the upward force of the ejection mechanism, and the pick-and-place mechanism moves to the top of the power test module, and then is sucked by the electric suction cup and placed in the designated position.

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