Protective cover for temperature rise test

Abstract

The invention relates to the technical field of PCB detection, in particular to a protective cover for a temperature rise test, which comprises a protective box cover body, a sealing door plate, a test placement seat and a PCB clamp, and is characterized in that the front side of the protective box cover body is provided with an opening for taking and placing a PCB, and a partition plate is fixed in the protective box cover body and divides the interior of the protective box cover body into a test cavity and a mounting cavity; the at least two test placement seats are arranged in the test cavity in an array mode in the vertical direction, each test placement seat can be pulled, pushed and adjusted in a front-back sliding mode, and a PCB clamp is arranged above each test placement seat. According to the invention, the PCB is arranged in the protective box cover body for a sealing test, so that the sealing environment in the test cavity can be ensured, the influence on the actual temperature detection result due to excessive heat loss caused by external air-conditioning wind or environmental wind blowing on the PCB is avoided, the protective box cover body and the sealing door plate have a good anti-explosion effect, explosion fragments can be effectively resisted, and the service life of the test box is prolonged. And detection personnel and external detection equipment are prevented from being injured.

Description

Technical Field

[0001] The invention relates to the technical field of PCB board detection, in particular to a protective cover for temperature rise test. Background Art

[0002] Temperature rise test is a test used to evaluate the temperature rise of electrical equipment under normal operating conditions. Its main purpose is to ensure that the equipment will not cause safety hazards or performance degradation due to excessively high temperatures during operation.

[0003] After some capacitor PCB boards are produced and processed, they need to undergo temperature rise tests to ensure that their temperature will not be too high under actual working conditions to avoid performance degradation, shortened life, reliability issues and safety hazards. By simulating the temperature rise in normal use, it is possible to verify whether the heat dissipation design of the PCB board is reasonable and ensure its stability and safety in long-term operation.

[0004] In the current temperature rise test of capacitor PCB boards, the PCB board with assembled capacitors is usually placed on the testing platform, and the temperature sensing wire is bonded to the test point of the product for testing. Since the capacitor PCB board is directly exposed on the testing platform, the temperature on the capacitor PCB board will be affected by factors such as air conditioning wind and environmental wind, resulting in inaccurate test data structure. In addition, thermal stability tests are mostly large current tests, and there is a safety risk of explosion of the capacitor PCB board during the test. The exposed layout will cause fragments to fly during the explosion, which is easy to cause damage to on-site staff and other testing equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a protective cover for temperature rise test to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions.

[0007] A protective cover for temperature rise test comprises a protective box cover body, a sealing door panel, a test placement seat and a PCB board clamp. The front side of the protective box cover body is provided with an opening for taking and placing a PCB board. A partition is fixed in the protective box cover body to divide the protective box cover body into two parts: a test chamber and an installation chamber. At least two test placement seats are arranged in an array in the test chamber in a vertical direction, and each test placement seat can be pulled, pushed and adjusted by sliding forward and backward. A PCB board clamp is arranged above each test placement seat, and the PCB board clamp is used to clamp the PCB board in the air above the test placement seat. The sealing door panel is arranged on the front side of the protective box cover body in a rotatable opening and closing manner, and is used to seal the front side opening of the protective box cover body to achieve sealing in the test chamber. Brackets are vertically fixed on each test placement seat, and power cords for electrically connecting the PCB board with an external power supply are fixed at the top of each bracket, and the power cords extend through to the outside of the protective box cover body.

[0008] By placing the PCB board on the test placement seat located in the protective box cover, closing the sealed door panel during the temperature rise test, and using the sealed door panel to seal the front opening of the protective box cover, the sealed environment in the test chamber can be ensured, and the external air conditioning wind or environmental wind is prevented from blowing on the PCB board to cause excessive heat loss and affect the actual temperature detection results, thereby ensuring the accuracy of the temperature rise test results. In addition, the protective box cover and the sealed door panel are made of metal or high-hardness acrylic material, which has a good explosion-proof effect. When the product explodes, the penetration and hardness of the product explosion fragments are not enough to break through the protective box cover and the sealed door panel, which can effectively resist the fragments and prevent the inspectors and external inspection equipment from being injured.

[0009] Preferably, each test placement seat is provided with a pair of sliding holes extending horizontally front and rear, and guide rods are slidably inserted in the two sliding holes, one end of the two guide rods extends to the outside of the test placement seat and is fixedly installed on the surface of the rear wall of the protection box cover body, and a positioning block is fixed to the side of each test placement seat and one end close to the rear wall of the protection box cover body, and the inner wall of the protection box cover body is at the same height as the test placement seats and is close to the front opening of the protection box cover body. The blocking blocks correspond to the blocking blocks and cooperate with the positioning blocks, and a pull handle is fixed to the front side of each test placement seat.

[0010] By utilizing the sliding cooperation of the guide rod and the sliding hole, the test placement seat has the ability to slide back and forth. When loading and unloading the PCB board, the space above the test placement seat can be vacated by sliding the test placement seat to the outside of the protective box cover, making it convenient to operate the PCB board clamp to take and place the PCB board. In addition, by utilizing the blocking cooperation of the guide rod and the sliding hole, the test placement seat can be prevented from sliding excessively and falling off the guide rod, thereby ensuring the stability of the test placement seat during sliding adjustment.

[0011] Preferably, the PCB board fixture includes a guide seat, a bidirectional threaded rod, a pair of nut seats and a pair of clamp seats. The guide seat is fixed above the test placement seat. The guide seat is provided with a guide groove. The bidirectional threaded rod is rotatably installed in the guide groove, and one end extends through and extends to the outer side of the guide seat and is equipped with a twist handle. The two nut seats are symmetrically limited and slidably installed in the guide groove, and are threadedly mounted on both sides of the bidirectional threaded rod. The two clamp seats are respectively fixed on the top ends of the two nut seats.

[0012] Preferably, the cross section of the clamp seat is L-shaped, and the tops of the two clamp seats on the sides close to each other are provided with a clamping hole for clamping the PCB board, and the clamp seats are made of polytetrafluoroethylene material.

[0013] By pinching the twist handle and screwing the bidirectional threaded rod to adjust, the rotating bidirectional threaded rod can threadably drive the nut seats on both sides and drive the clamp seats to approach each other, so that the PCB board can be clamped and fixed, and the clamp seat is arranged above the nut seat, so that the PCB board is suspended above the test placement seat, avoiding direct contact between the PCB board and the test placement seat, which causes excessive heat loss to the test placement seat. In addition, the clamp seat is made of polytetrafluoroethylene material, which has poor thermal and electrical conductivity. When in contact with the PCB board, it has a good thermal insulation and insulation effect, avoiding excessive heat loss and short circuit on the PCB board, and further improving the accuracy of the test structure.

[0014] Preferably, the power cord is divided into a wiring portion, a spring-shaped curled portion and a fixed portion. The wiring portion is installed at the top of the bracket, and the fixed portion is installed through the rear wall of the protective box cover. One end of the spring-shaped curled portion is connected to the wiring portion, and the other end is connected to the end of the fixed portion extending into the test cavity.

[0015] The spring-shaped curled portion on the power cord is set to a spring-type curled shape. When the test placement seat is slid and pulled to the outside of the protective box cover, the spring-shaped curled portion can be stretched. When the test placement seat is slid and reset into the protective box cover, the spring-shaped curled portion curls and resets, and then can be adaptively telescopically adjusted according to the position of the test placement seat, thereby achieving a good cable management and winding effect, and avoiding the power cord from being randomly placed in the test chamber to cause confusion and entanglement.

[0016] Preferably, a through-hole is provided on the rear wall of the protective box cover body, the fixing part is penetrated through the through-hole, and a rubber filler is filled in an interference fit between the inner wall of the through-hole and the outer wall of the fixing part.

[0017] After the fixing part is introduced into the test cavity through the through hole, the rubber filler is tightly filled between the inner wall of the through hole and the outer wall of the fixing part to ensure that the gap between the fixing part and the inner wall of the through hole is well sealed, thereby further improving the sealing performance of the test cavity in the laboratory.

[0018] Preferably, a U-shaped seat is fixed to the side of the protective box cover body near its front opening, an axle rod is rotatably mounted on the U-shaped seat, a connecting seat is fixedly mounted on the axle rod, a sealing door panel is mounted on the connecting seat, a visual tempered glass window is provided on the sealing door panel, and a buckle is provided on the side of the protective box cover body away from the U-shaped seat, and the sealing door panel is closed by the buckle.

[0019] Preferably, an inductor and a simulated resistor are arranged in the installation cavity, and the connection terminals on the inductor and the simulated resistor extend through and into the test cavity. A temperature data collector is arranged in the installation cavity, and a plurality of wires are connected to the temperature data collector, and each wire extends through and into the test cavity, and each end is connected to a thermocouple. A microprocessor is also arranged in the installation cavity, and the temperature data collector is electrically connected to the microprocessor.

[0020] Preferably, a suspension is fixed on the side wall of the protective box cover above each PCB board clamp, and an infrared thermometer and an infrared camera are installed on the lower surface of the suspension. The infrared thermometer and the infrared camera are electrically connected to the microprocessor through hidden wires pre-buried on the inner wall of the protective box cover.

[0021] Infrared thermometers are used to measure temperature by detecting infrared radiation emitted by PCB boards. Infrared cameras are used to create thermal images by detecting infrared radiation emitted by the surface of PCB boards, and the radiation of different temperature areas is converted into visual images to show the temperature distribution. Infrared thermometers and infrared cameras can transmit the detection results from the microprocessor to an external computer for display. The use of infrared detection technology for temperature measurement avoids the situation where direct contact will affect the measurement results, while reducing interference with the measured object and reducing the impact of distance or external moisture on measurement deviations. In addition, the temperature distribution of each area of ​​the PCB board can be displayed intuitively. This visualization result helps to quickly locate heat sources and overheating areas.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0023] 1. The present invention arranges the PCB board on a test placement seat located in the protective box cover body. During the temperature rise test, the sealing door panel is closed and the front opening of the protective box cover body is sealed with the sealing door panel, thereby ensuring a sealed environment in the test chamber, preventing external air conditioning wind or environmental wind from blowing on the PCB board to cause excessive heat loss and affect the actual temperature detection result, thereby ensuring the accuracy of the temperature rise test result. In addition, the protective box cover body and the sealing door panel are made of metal or high-hardness acrylic material, and have a good explosion-proof effect. When the product explodes, the penetration and hardness of the product explosion fragments are not enough to break through the protective box cover body and the sealing door panel, which can effectively resist the fragments and prevent the detection personnel and external detection equipment from being injured.

[0024] 2. The present invention utilizes the sliding cooperation of the guide rod and the sliding hole to enable the test placement seat to slide back and forth. When loading and unloading the PCB board, the space above the test placement seat can be vacated by sliding the test placement seat to the outside of the protective box cover, making it convenient to operate the PCB board clamp to take and place the PCB board. In addition, the blocking cooperation of the guide rod and the sliding hole can prevent the test placement seat from sliding excessively and sliding off the guide rod, thereby ensuring the stability of the test placement seat during sliding adjustment.

[0025] 3. The present invention pinches the twist handle and screws the bidirectional threaded rod to adjust it. The rotating bidirectional threaded rod can threadably drive the nut seats on both sides and drive the clamp seats to approach each other, so that the PCB board can be clamped and fixed, and the clamp seats are arranged above the nut seats, so that the PCB board is suspended above the test placement seat, avoiding direct contact between the PCB board and the test placement seat, which causes excessive heat loss to the test placement seat. In addition, the clamp seat is made of polytetrafluoroethylene material, which has poor thermal and electrical conductivity. When in contact with the PCB board, it has a good thermal insulation and insulating effect, avoiding excessive heat loss on the PCB board and the existence of a short circuit, thereby further improving the accuracy of the test structure.

[0026] 4. The present invention sets the spring-shaped curled portion on the power cord to a spring-type curled shape. When the test placement seat is slid and pulled to the outside of the protective box cover, the spring-shaped curled portion can be stretched. When the test placement seat is slid and reset into the protective box cover, the spring-shaped curled portion curls and resets, and then can be adaptively telescopically adjusted according to the position of the test placement seat, thereby achieving a good wire management and winding effect, and avoiding the power cord from being randomly placed in the test cavity to cause confusion and entanglement.

[0027] 5. After the fixing part is introduced into the test cavity through the through-hole, the rubber filler is tightly filled between the inner wall of the through-hole and the outer wall of the fixing part to ensure that the gap between the fixing part and the inner wall of the through-hole is well sealed, thereby further improving the sealing performance of the test cavity in the laboratory.

[0028] 6. The present invention uses an infrared thermometer to measure temperature by detecting infrared radiation emitted by a PCB board, uses an infrared camera to create a thermal image by detecting infrared radiation emitted by the surface of a PCB board, and converts radiation from different temperature areas into a visual image, thereby displaying the temperature distribution. The infrared thermometer and the infrared camera can transmit the detection results from a microprocessor to an external computer for display. The use of infrared detection technology for temperature measurement avoids the situation where direct contact affects the measurement results, while reducing interference with the object being measured and reducing the influence of distance or external moisture on measurement deviations. In addition, the temperature distribution of each area of ​​the PCB board can be intuitively displayed, and this visualization result helps to quickly locate heat sources and overheating areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is one of the three-dimensional schematic diagrams of the overall structure of the present invention;

[0030] Figure 2 This is the second three-dimensional schematic diagram of the overall structure of the present invention;

[0031] Figure 3 This is the third three-dimensional schematic diagram of the overall structure of the present invention;

[0032] Figure 4 It is a schematic diagram of the internal structure of the protective box cover body in the present invention;

[0033] Figure 5 This is one of the schematic diagrams of the partial structure inside the protective box cover of the present invention;

[0034] Figure 6 This is the second schematic diagram of the partial structure inside the protective box cover of the present invention;

[0035] Figure 7 It is a schematic diagram of the local structure of the surface of the test placement seat in the present invention;

[0036] Figure 8 for Figure 7 A schematic diagram of the structure enlargement in the middle;

[0037] Fig. 9 It is a schematic diagram of the installation of the test placement seat structure in the present invention.

[0038] In the figure: 1. protective box cover; 101. test cavity; 102. installation cavity; 103. sealing ring; 11. partition; 12. inductor; 13. analog resistor; 14. temperature data collector; 141. wire; 15. thermocouple; 2. sealing door panel; 21. U-shaped seat; 22. shaft rod; 23. connecting seat; 24. visual tempered glass window; 25. buckle shrink; 3. test placement seat; 31. guide rod; 32. sliding hole; 33. blocking block; 34 , positioning block; 35, pull handle; 4, PCB board fixture; 41, guide seat; 411, guide groove; 42, two-way threaded rod; 421, twist handle; 43, nut seat; 44, clamp seat; 441, bayonet; 5, bracket; 51, power cord; 511, wiring part; 512, spring-shaped curled part; 513, fixing part; 5131, lead hole; 5132, rubber filler; 6, suspension; 61, infrared thermometer; 62, infrared camera; 7, microprocessor. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 9 The present invention provides a protective cover for temperature rise test, comprising a protective box cover body 1, a sealing door panel 2, a test placement seat 3 and a PCB board clamp 4. The front side of the protective box cover body 1 has an opening for taking and placing a PCB board. A partition panel 11 is fixed inside the protective box cover body 1 to divide the inside of the protective box cover body 1 into two parts: a test chamber 101 and an installation chamber 102. At least two test placement seats 3 are arranged in an array in the test chamber 101 in a vertical direction, and each test placement seat 3 can be adjusted by sliding, pulling, pushing and sliding forward and backward. A PCB board clamp 4 is arranged above each test placement seat 3. The PCB board clamp 4 is used to clamp the PCB board in the air above the test placement seat 3. The sealing door panel 2 is arranged on the front side of the protective box cover body 1 in a rotatable opening and closing manner, and is used to block the front opening of the protective box cover body 1 to achieve sealing in the test chamber 101.

[0041] When the temperature rise test is carried out on the capacitor PCB board by using the protective cover, the capacitor is fixed on the PCB board with screws, then the sealed door panel 2 is opened, and the test placement seat 3 is slid out of the test cavity 101 to the outside of the protective box cover body 1, and then the PCB board is suspended and fixed above the test placement seat 3 by using the PCB board clamp 4, and then the test placement seat 3 and the PCB board fixed above it are slid and pushed into the test cavity 101 together and reset, and then the test circuits and power wiring are connected, the sealed door panel 2 is closed, and the temperature rise test can be carried out.

[0042] A bracket 5 is vertically fixed on each test placement seat 3, and a power cord 51 for electrically connecting the PCB board and the external power supply is fixed at the top of each bracket 5. The power cord 51 extends to the outside of the protective box cover 1. When connecting the power supply, the power cord 51 is connected to the PCB board at the end of the test cavity 101, and the PCB board can be powered by connecting the outer end of the power cord 51 to the power supply.

[0043] The present invention arranges the PCB board on the test placement seat 3 located in the protective box cover body 1. During the temperature rise test, the sealing door panel 2 is closed, and the front opening of the protective box cover body 1 is sealed with the sealing door panel 2, so as to ensure the sealed environment in the test chamber 101, avoid external air conditioning wind or environmental wind blowing on the PCB board to cause excessive heat loss and affect the actual temperature detection result, thereby ensuring the accuracy of the temperature rise test result. In addition, the protective box cover body 1 and the sealing door panel 2 are made of metal or high-hardness acrylic material, and have a good explosion-proof effect. When the product explodes, the penetration and hardness of the product explosion fragments are not enough to break through the protective box cover body 1 and the sealing door panel 2, which can effectively resist the fragments and prevent the detection personnel and external detection equipment from being injured.

[0044] Specifically, each test placement seat 3 is provided with a pair of sliding holes 32 extending horizontally forward and backward, and guide rods 31 are slidably inserted in the two sliding holes 32. One end of the two guide rods 31 extends to the outside of the test placement seat 3 and is fixedly installed on the rear side wall surface of the protection box cover body 1. The sliding cooperation between the guide rods 31 and the sliding holes 32 enables the test placement seat 3 to have the ability to slide forward and backward. When loading and unloading the PCB board, the space above the test placement seat 3 can be vacated by sliding the test placement seat 3 to the outside of the protection box cover body 1, so that the PCB board clamp 4 can be operated to take and place the PCB board conveniently.

[0045] A positioning block 34 is fixed to the side of each test placement seat 3 and one end close to the rear side wall of the protection box cover body 1. A blocking block 33 is fixed to the inner wall of the protection box cover body 1 at the same height as each test placement seat 3 and close to the front opening of the protection box cover body 1. The blocking block 33 corresponds to the blocking cooperation with the positioning block 34. When the test placement seat 3 is slid and pulled outward, the blocking cooperation of the guide rod 31 and the sliding hole 32 can prevent the test placement seat 3 from sliding excessively and sliding off the guide rod 31, thereby ensuring the stability of the test placement seat 3 during sliding adjustment. In addition, a pull handle 35 is fixed to the front side of each test placement seat 3. By pinching the pull handle 35, it is convenient to exert force to pull or push the test placement seat 3.

[0046] Specifically, the PCB board fixture 4 includes a guide seat 41, a two-way threaded rod 42, a pair of nut seats 43 and a pair of clamp seats 44. The guide seat 41 is fixed above the test placement seat 3. The guide seat 41 is provided with a guide groove 411. The two-way threaded rod 42 is rotatably installed in the guide groove 411, and one end extends through and extends to the outer side of the guide seat 41, and is installed with a twist handle 421. The two nut seats 43 are symmetrically limited and slidably installed in the guide groove 411, and are threadedly matched on both sides of the two-way threaded rod 42. The two clamp seats 44 are respectively fixed on the top of the two nut seats 43. The PCB board is placed between the two clamp seats 44. By pinching the twist handle 421 and screwing the two-way threaded rod 42 to adjust, the rotating two-way threaded rod 42 can threadably drive the nut seats 43 on both sides and drive the clamp seats 44 to approach each other, so that the PCB board can be clamped and fixed to ensure stability during the temperature rise test.

[0047] Specifically, the cross-section of the clamp seat 44 is L-shaped, and the top of the side where the two clamp seats 44 are close to each other has a clamping hole 441 for clamping the PCB board. The clamp seat 44 is made of polytetrafluoroethylene material, and the two ends of the PCB board are respectively placed in the clamping hole 441. When clamping, the two ends of the PCB board can be clamped in the clamping hole 441.

[0048] By pinching the twist handle 421 and screwing the bidirectional threaded rod 42 for adjustment, the rotating bidirectional threaded rod 42 can threadably drive the nut seats 43 on both sides and drive the clamp seats 44 to approach each other, so that the PCB board can be clamped and fixed, and the clamp seats 44 are arranged above the nut seats 43, so that the PCB board is suspended above the test placement seat 3, avoiding direct contact between the PCB board and the test placement seat 3, which causes heat to be transferred to the test placement seat 3 and cause excessive loss. In addition, the clamp seat 44 is made of polytetrafluoroethylene material, which has poor thermal and electrical conductivity. When in contact with the PCB board, it has a good thermal insulation and insulating effect, avoiding excessive heat loss on the PCB board and short circuit, and further improving the accuracy of the test structure.

[0049] Specifically, the power cord 51 is divided into a wiring portion 511, a spring-shaped curled portion 512 and a fixing portion 513. The wiring portion 511 is installed at the top of the bracket 5, and the fixing portion 513 is installed through the rear wall of the protective box cover body 1. One end of the spring-shaped curled portion 512 is connected to the wiring portion 511, and the other end is connected to the end portion of the fixing portion 513 extending into the test cavity 101. The spring-shaped curled portion 512 on the power cord 51 is set to a spring-type curled shape. When the test placement seat 3 is slid and pulled to the outside of the protective box cover body 1, the spring-shaped curled portion 512 can be stretched. When the test placement seat 3 is slid and reset to the inside of the protective box cover body 1, the spring-shaped curled portion 512 curls and resets, and then can be adaptively telescopically adjusted according to the position of the test placement seat 3, thereby achieving a good cable management and winding effect, and avoiding the power cord 51 from being randomly placed in the test cavity 101 to cause confusion and entanglement.

[0050] Specifically, a through-hole 5131 is provided on the rear wall of the protective box cover body 1, and the fixing part 513 is penetrated through the through-hole 5131. The inner wall of the through-hole 5131 and the outer wall of the fixing part 513 are also filled with rubber filler 5132 in an interference fit manner. After the fixing part 513 is introduced into the test chamber 101 through the through-hole 5131, the rubber filler 5132 is tightly filled between the inner wall of the through-hole 5131 and the outer wall of the fixing part 513, thereby ensuring that the gap between the fixing part 513 and the inner wall of the through-hole 5131 is well sealed, thereby further improving the sealing of the test chamber 101 in the laboratory.

[0051] Specifically, a U-shaped seat 21 is fixed to the side of the protective box cover body 1 near its front opening, a shaft 22 is rotatably mounted on the U-shaped seat 21, a connecting seat 23 is fixedly sleeved on the shaft 22, a sealing door panel 2 is mounted on the connecting seat 23, a visual tempered glass window 24 is provided on the sealing door panel 2, a buckle 25 is provided on the side of the protective box cover body 1 away from the U-shaped seat 21, the sealing door panel 2 is closed by the buckle 25, and the sealing door panel 2 is mounted on the protective box cover by using the U-shaped seat 21, the shaft 22 and the connecting seat 23. On the protective box cover body 1, a hinged effect of the sealing door panel 2 is achieved, thereby achieving a rotating opening and closing effect of the sealing door panel 2. The sealing door panel 2 can be locked when closed by means of a buckle 25, and a sealing ring 103 is fixed at the front end of the protective box cover body 1. When the sealing door panel 2 is closed, the sealing ring 103 is tightly squeezed and fitted between the protective box cover body 1 and the sealing door panel 2, thereby ensuring a good sealing effect. In addition, a visual tempered glass window 24 is provided on the sealing door panel 2, for convenient observation of the internal environment of the protective box cover body 1 during testing.

[0052] Specifically, an inductor 12 and a simulated resistor 13 are arranged in the installation cavity 102. The wiring terminals of the inductor 12 and the simulated resistor 13 extend through the test cavity 101. The wiring terminals of the inductor 12 and the simulated resistor 13 are connected to the circuit load end of the PCB board. The simulated resistor 13 can simulate different load conditions, and the inductor 12 is used to test the thermal effect when current passes through the circuit.

[0053] A temperature data collector 14 is arranged in the installation cavity 102. A plurality of wires 141 are connected to the temperature data collector 14. Each wire 141 extends through the test cavity 101 and is connected to a thermocouple 15 at its end. A microprocessor 7 is also arranged in the installation cavity 102. The temperature data collector 14 is electrically connected to the microprocessor 7. The thermocouple 15 is pasted and fixed to each position on the PCB that needs to be detected. When the PCB board is powered on, the voltage data of each detection position is detected by the thermocouple 15, wherein the voltage is proportional to the temperature of the contact point. The temperature can be accurately measured by reading this voltage, and the data is transmitted to the temperature data collector 14, and the temperature data collector 14 transmits the data to the microprocessor 7. The microprocessor 7 processes the data and transmits it to the external host, and displays a curve on the screen to intuitively represent the temperature changes of each detection position on the PCB board.

[0054] Specifically, a suspension 6 is fixed on the side wall of the protective box cover 1 above each PCB board clamp 4, and an infrared thermometer 61 and an infrared camera 62 are installed on the lower surface of the suspension 6. The infrared thermometer 61 and the infrared camera 62 are electrically connected to the microprocessor 7 through dark wires pre-buried on the inner wall of the protective box cover 1. The infrared thermometer 61 is aimed at the PCB board and measures the temperature by detecting the infrared radiation emitted by the object. The infrared camera 62 is aimed at the PCB board and creates a thermal image by detecting the infrared radiation emitted by the surface of the PCB board, and converts the radiation in different temperature areas into a visual image, thereby displaying the temperature distribution. The infrared thermometer 61 and the infrared camera 62 can transmit the detection results from the microprocessor 7 to an external computer for display. The use of infrared detection technology for temperature measurement avoids the situation where direct contact will affect the measurement results, while reducing interference with the object being measured and reducing the influence of distance or external moisture on the measurement deviation. In addition, the temperature distribution of each area of ​​the PCB board can be displayed intuitively, and this visualization result helps to quickly locate the heat source and overheating area.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A protective cover for temperature rise test, characterized in that: It comprises a protective box cover (1), a sealing door panel (2), a test placement seat (3) and a PCB board fixture (4); The front side of the protective box cover (1) has an opening for taking in and placing a PCB board, and a partition (11) is fixed inside the protective box cover (1) to divide the interior of the protective box cover (1) into two parts: a test chamber (101) and an installation chamber (102); At least two of the test placement seats (3) are arranged in an array in the vertical direction in the test chamber (101), and each of the test placement seats (3) can be slidably pulled, pushed and adjusted forward and backward; The PCB board clamp (4) is arranged above each of the test placement seats (3), and the PCB board clamp (4) is used to clamp the PCB board in mid-air above the test placement seat (3); The sealing door plate (2) is arranged on the front side of the protection box cover (1) in a rotatable opening and closing manner, and is used to seal the front opening of the protection box cover (1) to achieve sealing in the test chamber (101); A bracket (5) is vertically fixed on each of the test placement seats (3), and a power line (51) for electrically connecting the PCB board and an external power supply is fixed at the top of each of the brackets (5), and the power line (51) extends through and extends to the outside of the protective box cover (1).

2. A protective cover for temperature rise test according to claim 1, characterized in that: Each of the test placement seats (3) is provided with a pair of sliding holes (32) extending horizontally forward and backward, and a guide rod (31) is slidably inserted into each of the sliding holes (32), and one end of each of the guide rods (31) extends to the outside of the test placement seat (3) and is fixedly mounted on the rear side wall surface of the protective box cover body (1); A positioning block (34) is fixed to the side of each test placement seat (3) and at one end close to the rear side wall of the protective box cover body (1); The inner side wall of the protection box cover (1) is at the same height as each of the test placement seats (3) and is respectively fixed with a blocking block (33) near the front opening of the protection box cover (1), and the blocking block (33) is correspondingly matched with the positioning block (34); A pull handle (35) is fixed on the front side of each test placement seat (3).

3. The protective cover for temperature rise test according to claim 1, characterized in that: The PCB board clamp (4) comprises a guide seat (41), a bidirectional threaded rod (42), a pair of nut seats (43) and a pair of clamp seats (44); The guide seat (41) is fixed above the test placement seat (3), and a guide groove (411) is provided on the guide seat (41); The bidirectional threaded rod (42) is rotatably mounted in the guide groove (411), and one end thereof extends through and extends to the outer side of the guide seat (41) and is provided with a twist handle (421); The two nut seats (43) are symmetrically limited and slidably installed in the guide groove (411), and are thread-matchedly sleeved on both sides of the bidirectional threaded rod (42); The two clamping seats (44) are respectively fixed on the top ends of the two nut seats (43).

4. A protective cover for temperature rise test according to claim 3, characterized in that: The cross section of the clamping seat (44) is L-shaped, and the tops of the two clamping seats (44) on the sides close to each other are each provided with a clamping port (441) for clamping the PCB board; The clamping seat (44) is made of polytetrafluoroethylene material.

5. The protective cover for temperature rise test according to claim 1, characterized in that: The power cord (51) is divided into a wiring portion (511), a spring-shaped curling portion (512) and a fixing portion (513); The wiring portion (511) is installed on the top end of the bracket (5), and the fixing portion (513) is installed through the rear wall of the protective box cover (1); One end of the spring-shaped curled portion (512) is connected to the wiring portion (511), and the other end is connected to the end portion of the fixing portion (513) extending into the test cavity (101).

6. A protective cover for temperature rise test according to claim 5, characterized in that: A through-hole (5131) is provided on the rear wall of the protective box cover (1), and the fixing portion (513) is penetrated through the through-hole (5131); A rubber filler (5132) is also filled between the inner wall of the through hole (5131) and the outer wall of the fixing portion (513) in an interference fit.

7. The protective cover for temperature rise test according to claim 1, characterized in that: A U-shaped seat (21) is fixed to the side of the protective box cover body (1) near its front opening, a shaft (22) is rotatably mounted on the U-shaped seat (21), a connecting seat (23) is fixedly sleeved on the shaft (22), and the sealing door panel (2) is mounted on the connecting seat (23); The sealed door panel (2) is provided with a visual tempered glass window (24); A buckle (25) is provided on one side of the protective box cover (1) away from the U-shaped seat (21), and the sealing door panel (2) is closed by means of the buckle (25).

8. The protective cover for temperature rise test according to claim 1, characterized in that: An inductor (12) and a simulated resistor (13) are arranged in the installation cavity (102), and the upper wiring terminals of the inductor (12) and the simulated resistor (13) extend through and into the test cavity (101); A temperature data collector (14) is arranged in the installation cavity (102), and a plurality of wires (141) are connected to the temperature data collector (14), and each of the wires (141) extends through the test cavity (101) and has a thermocouple (15) connected at its end; A microprocessor (7) is also arranged in the installation cavity (102), and the temperature data collector (14) is electrically connected to the microprocessor (7).

9. A protective cover for temperature rise test according to claim 8, characterized in that: A suspension (6) is fixed on the side wall of the protective box cover (1) above each of the PCB board fixtures (4), and an infrared thermometer (61) and an infrared camera (62) are installed on the lower surface of the suspension (6); The infrared thermometer (61) and the infrared camera (62) are both electrically connected to the microprocessor (7) via dark wires pre-buried on the inner wall of the protective box cover (1).

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