Explosion-proof ground penetrating radar intrinsic safety power supply test tool

Abstract

The utility model discloses an explosion-proof ground penetrating radar intrinsically safe power supply test tool, which comprises a box body, a test control module arranged in the box body, a battery support plate arranged at the upper end of the box body, at least one mounting groove arranged on the battery support plate and used for placing an intrinsically safe power supply, and a support frame arranged at the upper end of the box body and comprising a guide post extending upwards, a lifting device is arranged on the supporting frame and connected with the upper end of the battery pressing plate so that the battery pressing plate can slide up and down along the guide columns, probe sets used for being connected with the positive electrode and the negative electrode of the battery are arranged at the lower end of the battery pressing plate, the number of the probe sets is the same as that of the installation grooves, and the positions of the probe sets correspond to the positions of the installation grooves. Each probe of the probe group is electrically connected with the test control module; the test control module comprises a control panel, a charging circuit and a discharging circuit. The control panel is connected with the charging circuit and the discharging circuit through relays. The problem of low test efficiency is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of power supply testing, specifically to a test fixture for intrinsically safe power supplies of explosion-proof ground penetrating radar. Background Technology

[0002] The explosion-proof ground-penetrating radar is powered by an intrinsically safe power supply composed of rechargeable lithium battery packs encapsulated with intrinsically safe components. Charge-discharge aging tests are required before and after the battery packs are encapsulated.

[0003] Currently, the typical method for conducting charge-discharge aging tests on intrinsically safe power supplies involves first connecting the power supply to a power source for charging, recording the charging status for a specified time period, allowing it to rest for a period after full charging, and then manually connecting a discharge load to discharge it at the rated current, recording the discharge status. This testing method requires manual monitoring of the entire charging and discharging process to ensure safety, a process that takes approximately 7.5 hours. This lengthy testing cycle severely restricts testing efficiency. Furthermore, the need to manually switch charging and discharging states and manually connect loads or power sources inevitably involves direct contact with the intrinsically safe power supply, posing safety hazards and potentially causing abnormal fluctuations in the power supply's temperature field due to human intervention, ultimately affecting the accuracy and reliability of the test data. Summary of the Invention

[0004] The present invention aims to provide a test fixture for intrinsically safe power supplies of explosion-proof ground penetrating radar to solve the problem of low testing efficiency.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a test fixture for intrinsically safe power supply of explosion-proof ground penetrating radar, comprising a housing, a test control module disposed within the housing, a battery tray at the upper end of the housing, at least one mounting slot on the battery tray for placing the intrinsically safe power supply, a support frame at the upper end of the housing, the support frame including an upwardly extending guide post, a battery pressure plate slidably fitted on the guide post above the battery tray, a lifting device on the support frame connected to the upper end of the battery pressure plate, allowing the battery pressure plate to slide up and down along the guide post, a probe group for connecting the positive and negative terminals of the battery at the lower end of the battery pressure plate, the number of probes being the same as the mounting slot and their positions corresponding, each probe of the probe group being electrically connected to the test control module; the test control module includes a control board, a charging circuit, and a discharging circuit, the control board being connected to the charging circuit and the discharging circuit respectively via relays.

[0006] The principle and advantages of this solution: The battery tray is equipped with a mounting groove to prevent the intrinsically safe power supply from being locked, which can securely place the intrinsically safe power supply. Above the power supply tray is a battery pressure plate that slides along the guide post. The lower end of the battery pressure plate is equipped with a probe group that corresponds to the position of the mounting groove. When the battery pressure plate descends along the guide post, the intrinsically safe power supply locked in the mounting groove can be smoothly connected to the corresponding probe group.

[0007] The battery pressure plate slides along the guide posts and, in conjunction with the lifting device, can move up and down flexibly, facilitating battery installation and removal with ease. The guide posts ensure stable contact and reliable connection between the probes on the battery pressure plate and the electrodes of the intrinsically safe power supply, avoiding manual alignment errors and guaranteeing test accuracy. The battery pressure plate automatically completes circuit connection when pressed down, simplifying operation and reducing the risk of poor contact. This prevents sparks caused by poor contact or short circuits during testing, meeting the explosion-proof requirements of intrinsically safe power supplies.

[0008] The battery tray has multiple mounting slots, supporting simultaneous testing of multiple intrinsically safe power supplies, significantly improving testing efficiency. It is especially suitable for mass production or quality inspection scenarios, offering high efficiency and batch testing capabilities.

[0009] The control board is connected to the charging and discharging circuits via relays. During testing, the charging and discharging processes can be automatically switched via relays without manual intervention. This not only automates the charging and discharging test, greatly reducing the labor intensity of operation and improving work efficiency, but also improves the accuracy of test data.

[0010] Preferably, the support frame further includes two support columns located on both sides of the battery tray, with the upper ends of the two support columns connected by a crossbar. The lifting device includes a mounting base, a spindle, and a handle. The mounting base is fixed on the crossbar. The upper part of the mounting base is provided with a handle fixing part, and the lower part is provided with a spindle guide hole. The handle includes a mounting part and a handle. The mounting part and the handle are connected by a bend. The mounting part is connected to the handle fixing part by a hinge shaft. The bend is connected to the upper end of the spindle by a pair of buckles. The lower end of the spindle passes through the spindle guide hole and is fixedly connected to the battery pressure plate. The buckles are movably connected to the bend and the spindle.

[0011] Beneficial effects: The lifting device is held in place on the support frame, ensuring its reliability; the lifting device's handle is connected to the mounting base via a hinge shaft, utilizing the lever principle, allowing the operator to move the mandrel and battery pressure plate up and down with minimal force by turning the handle, making operation effortless; the mandrel guide hole precisely guides the mandrel's movement, ensuring the battery pressure plate slides stably and vertically up and down along the guide post, enabling the probe assembly to accurately connect to the positive and negative terminals of the intrinsically safe power supply, improving the accuracy and reliability of the test.

[0012] Preferably, the housing is equipped with a heat sink, and the housing has a fan mounting port on which a fan is mounted. The fan, heat sink, and control board are electrically connected.

[0013] Beneficial effects: During charge and discharge testing, high current can easily cause components such as the control board and relays to overheat. The heat sink can quickly dissipate the heat from the control board and power module, and the forced cooling fan can reduce the internal temperature of the enclosure, preventing components from drifting or being damaged due to high temperatures. At the same time, high temperatures may affect the accuracy of sensors, and active cooling ensures long-term reliability of test data.

[0014] Preferably, the test control module further includes a communication circuit for transmitting test data.

[0015] Beneficial effect: The communication circuit facilitates the uploading of test data to the cloud or remote controller.

[0016] Preferably, the outer surface of the housing is provided with a display screen, which is electrically connected to the test control module. The test control module further includes a detection circuit, which is electrically connected to the control board for detecting intrinsically safe power supply data. The control board is used to analyze the data from the detection circuit, and the display screen is used to display the data from the detection circuit and the analysis results from the control board.

[0017] Beneficial effects: The detection circuit can collect the electrical parameters of the intrinsically safe power supply in real time, which facilitates the control board to analyze data fluctuations through algorithms; the display screen can intuitively display key parameters such as voltage, current, temperature, charge and discharge capacity, and cycle count. Operators can quickly grasp the test status without relying on external equipment. Compared with the traditional manual recording method, the data is automatically refreshed, reducing human transcription errors and improving test efficiency.

[0018] More preferably, the detection circuit includes a voltage detection circuit, a current detection circuit, and a temperature detection circuit. The voltage detection circuit is used to detect the real-time voltage of the intrinsically safe power supply, the current detection circuit is used to detect the real-time current of the intrinsically safe power supply, and the temperature detection circuit is used to detect the real-time temperature of the intrinsically safe power supply.

[0019] Beneficial effects: By detecting voltage, current, and temperature information, faults such as overvoltage, overcurrent, and abnormal temperature are monitored, ensuring comprehensive monitoring, precise control, intelligent protection, and data analysis during the intrinsically safe power supply testing process. This not only meets the safety requirements of explosion-proof equipment but also provides multi-dimensional test data for power supply performance evaluation, significantly improving the professionalism and reliability of the testing system.

[0020] More preferably, the number of test control modules and display screens is the same as the number of mounting slots, and each test control module is electrically connected to the corresponding probe group and display screen.

[0021] Beneficial effects: Each mounting slot is equipped with an independent test control module, display screen, and probe group to form a complete test unit. The independent test control module only needs to process the test data of the corresponding intrinsically safe power supply, which has low requirements for the computing and storage capabilities of the test control module. Each test channel adopts a physical isolation design to eliminate signal crosstalk between channels and ensure the accuracy of test data for each power supply.

[0022] Preferably, a current transformer is provided between the relay and the control board.

[0023] Beneficial effects: Installing a current transformer between the relay and the control board forms electrical isolation protection, ensuring the accuracy of signal acquisition and command transmission. Attached Figure Description

[0024] Figure 1 This is an isometric view of the testing fixture of this utility model;

[0025] Figure 2 This is a front view of the testing fixture of this utility model;

[0026] Figure 3 This is a side view of the testing fixture of this utility model;

[0027] Figure 4 This is a schematic diagram showing the arrangement of the components inside the box of this utility model.

[0028] The markings in the accompanying drawings include: base plate 1, housing 2, display screen 3, fan 4, control board 5, current transformer 6, relay 7, charging circuit 8, power supply 9, power button 10, heat sink 11, battery tray 12, mounting slot 121, support frame 13, mounting base 14, snap fastener 15, handle 16, spindle 17, battery pressure plate 18, probe group 19, guide post 20, mounting part 21, and turning part 22. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] Example 1

[0031] See Figures 1 to 4A test fixture for intrinsically safe power supplies of explosion-proof ground-penetrating radar includes a housing, which comprises a base plate 1 and a casing 2. The base plate 1 and the casing 2 are connected by snap-fit ​​or screws. A test control module is housed inside the housing. A battery tray 12 is located at the upper end of the housing, and at least one mounting slot 121 is provided on the battery tray 12 for placing the intrinsically safe power supply. In this embodiment, there are four mounting slots 121. A support frame 13 is also provided at the upper end of the housing. The support frame 13 includes an upwardly extending guide post 20 and two support posts located on both sides of the battery tray 12. The upper ends of the two support posts are connected by a crossbar. A battery pressure plate 18 is slidably fitted on the guide post 20, and the battery pressure plate 18 is located above the battery tray 12. A lifting device is provided on the crossbar of the support frame 13, and the lifting device is connected to the upper end of the battery pressure plate 18, allowing the battery pressure plate 18 to slide up and down along the guide post 20. The lower end of the battery pressure plate 18 is provided with a probe group 19 for connecting the positive and negative terminals of the battery. The probe group 19 includes a positive terminal probe and a negative terminal probe. The number of probes in the probe group 19 is the same as that in the mounting slot 121, and their positions correspond. Each probe in the probe group 19 is electrically connected to the test control module. The test control module includes a control board 5, a charging circuit 8, and a discharging circuit. The control board 5 is connected to the charging circuit 8 and the discharging circuit through a relay 7. The discharging circuit includes a load, and the charging circuit 8 includes a charger. In this embodiment, a resistor of model RX24 15Ω / 100W / ±5% is used. The charger is model NGE828, the relay 7 is model OmronG7SA-EX, and the main control chip of the control board 5 is model STM32F103C8T6-EX.

[0032] In this embodiment, the intrinsically safe battery refers to an intrinsically safe battery.

[0033] Preferably, the lifting device includes a mounting base 14, a spindle 17, and a handle. The mounting base 14 is fixed on a crossbar. The upper part of the mounting base 14 is provided with a handle fixing part, and the lower part is provided with a spindle guide hole. The handle includes a mounting part 21 and a handle 16. The mounting part 21 and the handle 16 are connected by a bend 22. The mounting part 21 is connected to the handle fixing part through a hinge shaft. The bend 22 is connected to the upper end of the spindle 17 through a pair of buckles 15. The lower end of the spindle 17 passes through the spindle guide hole and is fixedly connected to the battery pressure plate 18. The buckles 15 are movably connected to the bend 22 and the spindle 17.

[0034] Preferably, to cool the test control module inside the housing, a heat sink 11 is provided inside the housing, and a fan mounting port is provided on the housing, on which a fan 4 is installed. The heat sink 11 and the fan 4 are electrically connected to the control board 5. The heat sink 11 and the fan 4 work together to cool the components inside the housing, ensuring the smooth progress of the test. The heat sink 11 can be a metal heat-conducting plate, a graphite heat sink, or a heat pipe structure; in this embodiment, a graphite heat sink is used.

[0035] The casing is equipped with a display screen 3, which is electrically connected to the test control module. The test control module also includes a detection circuit, which is electrically connected to the control board 5 for detecting intrinsically safe power supply data. The control board 5 is used to analyze the data from the detection circuit, and the display screen 3 is used to display the data from the detection circuit and the analysis results from the control board 5. The display screen 3 is specifically located on the front side of the casing 2, and this front side is inclined to facilitate reading the displayed data.

[0036] The detection circuit includes a voltage detection circuit, a current detection circuit, and a temperature detection circuit. The voltage detection circuit detects the real-time voltage of the intrinsically safe power supply, the current detection circuit detects the real-time current of the intrinsically safe power supply, and the temperature detection circuit detects the real-time temperature of the intrinsically safe power supply. The control board 5 analyzes the voltage, current, and temperature of the intrinsically safe power supply to monitor for faults such as overvoltage, overcurrent, and abnormal temperature, ensuring the safe testing process of the intrinsically safe power supply. The control board stores detection data such as voltage, current, and temperature, as well as threshold parameters for charge and discharge duration. The display screen has buttons electrically connected to the control board, which can be used to change the predicted parameters. In this embodiment, the voltage detection circuit is a high-precision ADC voltage sampling circuit, using an ADS1110AOIDBVR voltage sampling chip. The current detection circuit uses a Hall sensor for current sampling, model HPT50A-Ex, and the temperature sensor circuit uses a thermistor for temperature sampling, model NTC-MF52-103.

[0037] The number of test control modules and display screens 3 can be one or the same as the number of mounting slots. In this embodiment, the number of test control modules and display screens 3 is the same as the number of mounting slots, which is four. Each test control module is electrically connected to the corresponding probe group 19 and display screen 3. In other embodiments, the number of test control modules and display screens 3 is one. The test control module is electrically connected to multiple probe groups 19. During testing, the control board 5 sequentially displays the test data of multiple intrinsically safe batteries being tested on the display screen 3.

[0038] A current transformer 6 is provided between the relay 7 and the control board 5.

[0039] The test control module includes a memory and a timer. The timer is used to time the charging, discharging, and waiting processes during the test and displays the results on the display screen 3. The memory is used to store test data. In this embodiment, the memory model is AT24C512C. The counter can be set in the software program or it can be an external counter on the control board 5. In this embodiment, an external timer is used, specifically model TPL5010DDCR.

[0040] The test control module also includes a power supply 9 for powering the test control module. A power button 10 is provided on the box and is electrically connected to the power supply 9.

[0041] Example 2

[0042] It also includes a remote control terminal.

[0043] The test control module includes a communication circuit, which communicates with a remote control terminal to transmit test data. The communication circuit uses wireless communication, such as Wi-Fi or 5G; in this embodiment, Wi-Fi is used.

[0044] Working Principle: During testing, the intrinsically safe battery to be tested is first placed in the mounting slot. Then, the power is turned on via the power button, and the threshold parameters are adjusted according to the intrinsically safe battery being tested. Rotating the handle moves the spindle downwards, causing the battery pressure plate to move down along the guide post. The probes on the battery pressure plate make contact with the positive and negative terminals of the intrinsically safe battery. The control board controls the charging circuit to charge the intrinsically safe battery. Charging stops when conditions such as charging capacity and charging time are met, and the control board controls the relay to switch to discharge testing. During charging and discharging, voltage, current, and temperature are monitored in real time to prevent faults such as overvoltage, overcurrent, undervoltage, and overtemperature.

[0045] This testing fixture acquires voltage and temperature parameters through high-precision ADC sampling; it uses the coulomb method to measure the battery's state of charge (SOC) and estimate the battery's charge level, eliminating the need for manual measurement and recording, thus improving the stability and reliability of the test; it achieves automatic charging and discharging testing of intrinsically safe power supplies by controlling relay switching, freeing up manpower and improving work efficiency; it has overvoltage, overcurrent, undervoltage, and overtemperature protection functions, enhancing the safety of the test; the fixture precisely positions the test points, eliminating welding operations, making it safe and environmentally friendly.

[0046] Using this testing fixture, automated batch testing of intrinsically safe batteries can be performed. It is easy to operate and highly efficient. Compared with the 7 hours required by existing technologies, it can save 2 hours, greatly reducing the testing time and thus effectively reducing labor costs.

[0047] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A testing fixture for intrinsically safe power supplies of explosion-proof ground-penetrating radar, characterized in that: The device includes a housing, within which a test control module is housed. A battery tray is located at the top of the housing, and the battery tray has at least one mounting slot for holding an intrinsically safe power source. A support frame is also located at the top of the housing, including an upwardly extending guide post. A battery pressure plate slidably engages with the guide post above the battery tray. A lifting device is mounted on the support frame, connected to the upper end of the battery pressure plate, allowing the battery pressure plate to slide up and down along the guide post. A probe set for connecting the positive and negative terminals of the battery is located at the lower end of the battery pressure plate. The number of probes in the probe set is the same as the number of mounting slots, and their positions correspond. Each probe in the probe set is electrically connected to the test control module. The test control module includes a control board, a charging circuit, and a discharging circuit. The control board is connected to the charging circuit and the discharging circuit via relays.

2. The explosion-proof ground-penetrating radar intrinsically safe power supply test fixture according to claim 1, characterized in that: The support frame also includes two support columns located on both sides of the battery tray, with the upper ends of the two support columns connected by a crossbar. The lifting device includes a mounting base, a spindle, and a handle. The mounting base is fixed on the crossbar. The upper part of the mounting base is provided with a handle fixing part, and the lower part is provided with a spindle guide hole. The handle includes a mounting part and a handle. The mounting part and the handle are connected by a bend. The mounting part is connected to the handle fixing part through a hinge shaft. The bend is connected to the upper end of the spindle through a pair of buckles. The lower end of the spindle passes through the spindle guide hole and is fixedly connected to the battery pressure plate. The buckles are movably connected to the bend and the spindle.

3. The explosion-proof ground-penetrating radar intrinsically safe power supply test fixture according to claim 1, characterized in that: The box is equipped with a heat sink and a fan mounting port. A fan is installed in the fan mounting port, and the fan, heat sink, and control board are electrically connected.

4. The intrinsically safe power supply test fixture for explosion-proof ground penetrating radar according to claim 1, characterized in that: The test control module also includes a communication circuit for transmitting test data.

5. The intrinsically safe power supply test fixture for explosion-proof ground penetrating radar according to claim 1, characterized in that: The box is equipped with a display screen on its exterior, which is electrically connected to the test control module. The test control module also includes a detection circuit, which is electrically connected to the control board for detecting intrinsically safe power supply data. The control board is used to analyze the data from the detection circuit, and the display screen is used to display the data from the detection circuit and the analysis results from the control board.

6. The explosion-proof ground-penetrating radar intrinsically safe power supply test fixture according to claim 5, characterized in that: The detection circuit includes a voltage detection circuit, a current detection circuit, and a temperature detection circuit. The voltage detection circuit is used to detect the real-time voltage of the intrinsically safe power supply, the current detection circuit is used to detect the real-time current of the intrinsically safe power supply, and the temperature detection circuit is used to detect the real-time temperature of the intrinsically safe power supply.

7. The explosion-proof ground-penetrating radar intrinsically safe power supply test fixture according to claim 5, characterized in that: The number of test control modules and displays is the same as the number of mounting slots, and each test control module is electrically connected to the corresponding probe group and display.

8. The explosion-proof ground-penetrating radar intrinsically safe power supply test fixture according to claim 1, characterized in that: A current transformer is provided between the relay and the control board.

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