Three-parameter comprehensive test device for electronic component of heavy-load locomotive

Abstract

The utility model provides a three-parameter comprehensive test device for an electronic component of a heavy-load locomotive. The test device comprises a test room, an electrical control cabinet, a vibration device and an adjustable clamp, a tested electronic component is placed in the test room, and the adjustable clamp is used for fixing the tested electronic component; a temperature, humidity and vibration three-parameter testing environment is provided through the temperature and humidity control unit and the vibration device of the electrical control cabinet; the vibration device is composed of a vibration table top, a guide column, a vibration bottom plate and an electromagnetic vibration exciter, the vibration table top is connected with the vibration bottom plate through the guide column, and the influence of the high-temperature and high-humidity environment in the test chamber on a controller in the electrical control cabinet is reduced; the height of the connecting rod is adjusted according to the size of a measured electronic component; the position of the clamping hand is changed by moving the position of the base, and the pressing force is determined by the stroke of the spiral sliding block compressing the spring. A cable inlet and outlet is reserved in the side wall of the test chamber and is sealed by a rubber ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rail transit, especially relates to a temperature, humidity and vibration three comprehensive tester of heavy haul locomotive electronic component. BACKGROUND

[0002] Heavy haul locomotive runs in various severe environments, such as extreme high or low temperature, high humidity and severe vibration, which can cause frequent failure of important electronic components (such as display, LCD display screen and locomotive electronic cabinet) of heavy haul locomotive. When the electronic components that fail during operation are removed for repair, there is no failure, which brings great difficulty to the repair of electronic equipment and causes a large amount of waste of manpower and financial resources, so it is urgent to develop a tester that simulates the temperature, humidity and vibration three parameter environmental conditions of heavy haul locomotive. The temperature, humidity and vibration three comprehensive tester can test the test article placed on the vibration table surface to receive vibration, temperature alternating test and humidity effect at the same time. The temperature, humidity and vibration three comprehensive test has mature temperature and humidity control technology. There are two categories of vibration technology: mechanical vibration type and electromagnetic excitation type, among which the electromagnetic excitation structure has two types: one is to generate electromagnetic force by controlling electromagnetic attraction switch to generate vibration force on the vibration table surface; the other is moving coil electromagnetic type. Although the vibration driving principles of the above three methods are different, the test object needs to be fixed on the vibration table to ensure the accuracy of acceleration and vibration frequency parameter test.

[0003] The existing three parameter comprehensive test device adopts simple fixing assembly. The simple fixing assembly is composed of screw rod, nut and pressing sheet. This fixing assembly needs to open multiple rows of uniform holes on the vibration table surface, select the appropriate position close to the test object on the vibration table surface, and fix the edge of the test object by simple fixing clamp. This fixing method requires dense holes on the vibration table, and the operation is complicated. Moreover, the display, electric control cabinet and other devices on the heavy haul locomotive are large in size and have no fixed edge, and the height and size of different electronic components are not uniform, so it is difficult to fix them by the above method. Another method is to fix the test object by using gas negative pressure principle. This method only needs to open a few holes on the vibration table, and uses a gas pump to generate negative pressure to suck the test object. This structure is suitable for small objects with uniform surface. The electronic components of heavy haul locomotive are specific functional components assembled by multiple components and housings, and the surface is uneven. The device is easy to leak. In order to solve the problem of fixing irregular electronic components of heavy haul locomotive, a new type of clamp that can automatically adjust is needed. This new clamp can fix the electronic components from the top, has certain height and fixing point adjustment capacity, can adjust the clamping force, and reduces the damage to electronic screen and other components.

[0004] After prolonged testing in a combined temperature, humidity, and vibration testing machine, water vapor may not dissipate completely and may flow into electrical components through gaps after cooling. Existing literature uses isolation covers and drainage holes to protect electrical components. This utility model discloses a new, simple, and effective vibration table design.

[0005] In addition, in order to meet the requirements of both temperature, humidity and vibration testing and power-on testing of electronic components, a cable inlet and outlet of appropriate size needs to be opened in the testing room to facilitate live testing of the terminals of electronic components. Utility Model Content

[0006] To address the problems existing in the background technology, this utility model provides a three-parameter integrated testing device for electronic components of heavy-duty locomotives. This testing machine can provide different temperature, humidity, and vibration environmental conditions. The structure of the device has been improved by separating the test chamber 1 from the electrical control cabinet 14, thereby improving the reliability of the three-parameter integrated testing system. This testing machine can simulate the main working environment of the locomotive, enabling electronic components to undergo live testing under these conditions, providing a testing system for the electronic reliability testing of electronic components. Furthermore, to meet the testing requirements of irregular electronic components, a novel adjustable fixture is designed, which has good fixation and movable fixing points.

[0007] This utility model provides a three-parameter integrated testing device for electronic components of heavy-duty locomotives, including a test chamber 1, an electrical control cabinet 14, a vibration device, and an adjustable fixture 4; the vibration table 6 of the vibration device is in the test chamber 1, and the vibration base plate 8 of the vibration device is in the electrical control cabinet 14; the vibration table 6 and the vibration base plate 8 are connected by guide columns 7; the adjustable fixture 4 is located on the vibration table 6; the electronic component 18 to be tested is placed in the test chamber 1, and a three-parameter testing environment of temperature, humidity, and vibration is provided. The vibration device consists of a vibration table 6, a guide column 7, a vibration base plate 8, and an electromagnetic exciter 9. The adjustable clamp consists of a column 22, a connecting rod 24, and a gripper 25. The column 22 is connected to the vibration table 6 by screws. A row of screw holes is evenly spaced on the inner side of the column 22. The two ends of the connecting rod 24 are fixed to the column by bolts. The position of the connecting rod can be adjusted to adapt to the testing of electronic components of different sizes. The height of the connecting rod can be adjusted through the screw holes to adapt to the height difference of the tested components. The gripper 25 is placed directly on the connecting rod 24 to fix the tested electronic components.

[0008] The water vapor from the device, after freezing during testing, will not affect the electrical and control components, thus enhancing the system's reliability. To accommodate the main electronic components of the heavy-duty locomotive, such as the electrical control cabinet and display screen, within test chamber 1, the internal dimensions of test chamber 1 are preferably 800mm × 800mm × 700mm.

[0009] The test chamber 1 has a test door 2 installed on its side. The test door 2 is equipped with an LCD touch screen panel 3 and an observation glass plate 5. The test door 2 is made of high-strength, corrosion-resistant material, has a switch button and good sealing performance. The inner and outer walls of the test chamber 1 are insulated with thermal insulation material, preferably polyurethane foam. A cable inlet / outlet 17 is opened on its side wall and sealed with a rubber ring. Its function is to enable the electronic components to be tested under live conditions. The LCD touch screen panel 3 can set and display temperature, humidity and vibration parameters, which is convenient for users to set parameters. The observation glass plate 5 on the test door allows users to observe the state of the tested object without opening the test door.

[0010] The electrical control cabinet 14 is equipped with an electromagnetic vibrator 9, a humidity control unit 10, a condenser 11, a temperature control unit 12, and a moisture nozzle 13.

[0011] Furthermore, the temperature control unit includes a temperature sensor, a controller, and an actuator. The temperature inside the test chamber 1 is fed back to the controller of the temperature control unit via the temperature sensor. Based on the feedback signal, the controller controls the temperature actuators, causing hot and cold air to be input into the test chamber 1 through the copper pipe 16 and the fan 15, respectively. The humidity control unit 10 controls the water circulation in the corresponding water tank, and controls the water pump and atomization system based on the humidity deviation, atomizing water vapor and providing a humid environment to the test chamber through the humidity nozzle.

[0012] The electromagnetic exciter of the vibration device contains an iron core, a coil, and an armature, which generates an alternating magnetic field, thereby producing an alternating electromagnetic force. This causes the vibrating base plate to reciprocate near its equilibrium position, generating an excitation force. The vibrating base plate drives the vibration table to vibrate together via guide columns. When the electronic component under test is placed on the vibration table, the electronic component also vibrates accordingly.

[0013] The clamp 25 includes a base 26, a threaded rod 27, a helical slider 28, a metal washer 23, a bent rod 29, a slider base 30, a spring 31, and a fastening ring 32. The base 26 is fixed to the connecting rod 24. The threaded rod 27 is vertically installed in the threaded hole of the base 26, and the fastening ring 32 is fixedly provided at the lower part of the threaded rod 27. The upper part of the threaded rod 27 is threadedly connected to the helical slider 28. The spring 31 is fitted in the middle of the threaded rod 27, and its lower end is fixed to the fastening ring 32. The bent rod is structurally marked as a horizontal part and a bent part. The metal washer 23 has a round hole, and the horizontal part of the bent rod 29 has a round threaded hole in the middle, into which the threaded rod 27 is fitted. The metal washer 23 is located between the spiral slider 28 and the bent rod 29. The metal washer and the bent rod 29 are both pressed on the spring. One end (bent part) of the bent rod 29 is hinged to the slider base 30, and the other end (horizontal part) of the bent rod 29 is fixed with two metal rods 21, distributed on both sides of the connecting rod 24, for fixing the electronic component 18 under test. The slider base 30 is set on the connecting rod 24 to support and position the bent rod 29. The connecting rod has a T-slot, into which the base 26 and the slider base 30 are embedded. The diameter of the spring 31 is larger than the diameter of the threaded rod.

[0014] To reduce the risk of the metal rod scratching the electronic components being tested, a plastic film is bonded to the lower end of the metal rod 21, which serves to reduce damage to the tested object.

[0015] The side wall of the test chamber 1 has a reserved cable inlet / outlet 17, which is sealed with a rubber ring.

[0016] Compared with existing technologies, this utility model provides an optimized structure for a testing machine, dividing the testing chamber and electrical unit into two separate spaces. The conventional single vibration table is replaced by a vibration table and a vibration base plate, rigidly connected by columns. This isolates the control unit from high humidity and high temperature environments. In particular, the innovative clamps are height-adjustable, laterally adjustable, and provide multiple fixing points from the top. This improves the structural reliability of the system when conducting comprehensive testing of temperature, humidity, and vibration parameters. Attached Figure Description

[0017] Figure 1 This is a side view schematic diagram of a three-parameter integrated testing device for electronic components of a heavy-duty locomotive according to this utility model.

[0018] Figure 2 This is a side view of the adjustable clamp of this utility model.

[0019] Figure 3 This is a top view of the adjustable clamp of this utility model.

[0020] Figure 4 This is a schematic diagram showing the connection between the connecting rod and the base of the gripper in this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1-Test chamber, 2-Test door, 3-LCD touch screen panel, 4-Adjustable clamp, 5-Glass plate, 6-Vibration table, 7-Guide column, 8-Vibration base plate, 9-Magnetic vibrator, 10-Humidity control unit, 11-Condenser, 12-Temperature control unit, 13-Moisture nozzle, 14-Electrical control cabinet, 15-Fan, 16-Copper pipe, 17-Cable inlet / outlet, 18-Electronic component, 21-Metal rod, 22-Column, 23-Metal washer, 24-Connecting rod, 25-Handle, 26-Base, 27-Threaded rod, 28-Helical slider, 29-Bent rod, 30-Slider base, 31-Spring, 32-Fastening ring. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides a three-parameter integrated testing device for electronic components of heavy-duty locomotives, and the embodiments are described below.

[0024] Following a reasonable assembly sequence, first assemble the gripper and connect it to the connecting rod. The specific implementation steps are as follows: first, install the base and sliding base into the T-slot of the connecting rod, then fix the threaded rod on the base, and then sequentially fit the fastening ring 32, spring bend 29, metal washer 23, and spiral slider 28 onto the threaded rod, so that the spring moves linearly between the fastening ring 32 and the metal washer.

[0025] Open the test door 3. Based on the size of the electronic component being tested, secure the column 22 to the vibration table 6 symmetrically at both ends of the vibration table using screws. Then place the object to be tested in the center of the vibration table. According to the height of the object, insert the connecting rod with the gripper into the threaded hole of the column. The two ends of the connecting rod 24 are fixed to the column with bolts.

[0026] In this embodiment, the gripper position is determined according to the actual shape of the object being tested, and the gripper 25 is moved on the connecting rod. Then, by adjusting the helical slider 28, it moves downwards on the threaded rod 27, pressing the metal washer and compressing the spring 31, causing the bent rod 29 to move downwards. The helical slider is adjusted so that the clamping force meets the fixing requirements of the electronic component being tested. After the spring is compressed, the spring force fixes the gripper's screw and base to the connecting rod.

[0027] In this embodiment, two grippers can be inserted to increase the number of fixing points, depending on the actual size of the electronic component being tested and the testing requirements.

[0028] In this embodiment, two fixed rods are connected to the end of the bent rod, located on both sides of the connecting rod, thereby making the fixing pressure more uniform.

[0029] In this embodiment, the position of the spiral slider on the screw is adjusted. The spiral slider moves downward to compress the spring, and the sliding base moves horizontally in the T-slot of the connecting rod to ensure that the bent rod moves horizontally downward, driving the pressure rod to press down on the object being measured.

[0030] In this embodiment, after the test is completed, the test door is closed. The parameter initialization settings of the three-parameter integrated testing device are then initiated, with the setting range referring to GB / T 25119-2021 "Electronic Devices for Rail Transit Locomotives and Rolling Stock". The preferred temperature range is -40℃ to 80℃, the preferred humidity range is 20%RH to 98%RH, and the preferred vibration control frequency is 0-500Hz. The initial values ​​of the above basic parameters are input using the LCD touchscreen panel, and the test duration and test mode are set. After setting, the test is started. All tests are completed automatically. The temperature and humidity control unit and the vibration device, according to the program set inside the controller, control the temperature and humidity inside test chamber 1 to the set accuracy, while simultaneously controlling the vibration device to provide vibration.

[0031] In this embodiment, the user can observe the indoor test situation by observing the glass plate 5.

[0032] In this embodiment, if it is necessary to power the object under test, the plug interface of the electronic component can be extended and connected to an external electronic control machine through the cable inlet and outlet.

[0033] In this embodiment, the system automatically shuts down after the test is completed. Alternatively, it can be manually shut down. After waiting 15 minutes, the test door is opened, the object under test is removed, and the current test is complete. To conduct the next test, simply re-initialize the initial values, readjust the fixture position, and repeat the above process.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A three-parameter integrated testing device for electronic components of heavy-duty locomotives, characterized in that, Includes a laboratory (1), an electrical control cabinet (14), a vibration device, and an adjustable clamp (4); The vibration device includes a vibration table (6), guide columns (7), a vibration base plate (8), and an electromagnetic exciter (9). The vibration table (6) is located in the test chamber (1), and the vibration base plate (8) and the electromagnetic exciter (9) are located in the electrical control cabinet (14). The electromagnetic exciter (9) is fixed at the bottom of the electrical control cabinet (14), and the vibration base plate (8) is installed on the electromagnetic exciter (9). The vibration table (6) and the vibration base plate (8) are connected by the guide columns (7). The adjustable clamp (4) is located on the vibration table (6). The electronic component (18) to be tested is placed on the vibration table (6), and a test environment for the three parameters of temperature, humidity, and vibration is provided.

2. The three-parameter integrated testing device for electronic components of heavy-duty locomotives according to claim 1, characterized in that, The adjustable clamp includes a column (22), a connecting rod (24), and a clamp (25). Two columns (22) are symmetrically arranged on the vibration table (6). A row of screw holes is evenly distributed on the column (22). The two ends of the connecting rod (24) are fixed to the column with bolts. The installation position of the screw holes is selected to adapt to the height difference of the electronic component (18) under test. The clamp (25) is placed directly on the connecting rod (24) to fix the electronic component under test.

3. The three-parameter integrated testing device for electronic components of heavy-duty locomotives according to claim 2, characterized in that, The clamp (25) includes a base (26), a threaded rod (27), a spiral slider (28), a metal washer (23), a bent rod (29), a slider base (30), a spring (31), and a fastening ring (32). The base (26) is fixed on the connecting rod (24). The threaded rod (27) is vertically installed in the threaded hole of the base (26), and a fastening ring (32) is fixedly provided at the lower part of the threaded rod (27). The upper part of the threaded rod (27) is threadedly connected to the spiral slider (28). The spring (31) is fitted in the middle of the threaded rod (27), and its lower end is connected to the fastening ring (32). The ring (32) is fixed; a circular threaded hole is opened in the middle of the horizontal part of the bent rod (29), and a threaded rod (27) is fitted in the hole; a metal washer (23) is located between the spiral slider (28) and the bent rod (29), and the bent rod (29) is pressed on the spring; one end of the bent rod (29) is hinged to the slider base (30), and two metal rods (21) are fixed at the other end of the bent rod (29), distributed on both sides of the connecting rod (24), for fixing the electronic component (18) under test; the slider base (30) is set on the connecting rod (24) for supporting and positioning the bent rod (29).

4. The three-parameter integrated testing device for electronic components of heavy-duty locomotives according to claim 1, characterized in that, The test chamber (1) is equipped with a test door (2) on its side, and the test door (2) is equipped with an LCD touch screen panel (3) and an observation glass plate (5).

5. The three-parameter integrated testing device for electronic components of heavy-duty locomotives according to claim 1, characterized in that, The electrical control cabinet (14) is equipped with a humidity control unit (10), a condenser (11), a temperature control unit (12), and a moisture nozzle (13).

6. The three-parameter integrated testing device for electronic components of heavy-duty locomotives according to claim 1, characterized in that, The test chamber (1) has a reserved cable inlet / outlet (17) on its side wall, and the cable inlet / outlet (17) is sealed with a rubber ring.

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