Insulation detection auxiliary device

Abstract

The utility model relates to the technical field of insulation detection of missile launchers, in particular to an insulation detection auxiliary device which comprises a box body, a single chip microcomputer, a left relay set and a right relay set which are arranged in the box body, and the left relay set and the right relay set are connected with the single chip microcomputer. The front side box wall of the box body is provided with an operation button connected with the single-chip microcomputer and a progress indicating lamp connected with the left relay set and the right relay set. The rear side box wall of the box body is provided with a power interface, a cable socket and a megohmmeter binding post connected with the left relay set and the right relay set. According to the utility model, automation of the wiring process is realized, and time consumed by insulation detection work of the missile launcher can be substantially shortened. Compared with other insulation detection devices, the insulation detection device has the advantages that the cost is reduced through an external megohmmeter structure, and the portability of the device is realized. The device can realize a self-checking function, is low in failure rate, does not need regular verification, and is suitable for outfield operation.

Description

Technical Field

[0001] The utility model relates to the technical field of insulation detection of missile launch devices, and particularly to an insulation detection auxiliary device. Background Technique

[0002] The missile launch device is a product of the aircraft fire control system, including a cable composed of multiple independent wires. During inspection and repair, insulation detection of the straight-through wires in the cable is required. Existing measurement methods need to use a megohmmeter to test the insulation performance between each wire one by one. Taking a certain type of missile launch device as an example, it contains 30 wires to be tested. According to the existing technology, (30*29) / 2 = 435 measurement cycles are required, which is prone to missed measurements, repeated measurements, and even wiring errors, resulting in the breakdown of electronic components. "Multichannel Cable Fast Insulation Detection System and Multichannel Cable Insulation Detection Method" (Publication No. CN 102621462 A) proposes a detection system and a detection method. Taking a cable containing 30 wires as an example, but using the method proposed in this patent, 30 measurement cycles are still required. Summary of the Invention

[0003] In order to solve the above technical problems, the utility model proposes an insulation detection auxiliary device. It realizes the automation of the wiring process, automatically connects the wires to be tested to the positive and negative poles of the megohmmeter, controls the megohmmeter to measure. Using the measurement method proposed by the utility model, the measurement cycle of 30 wires can be reduced to 15. During the measurement process, the operator only needs to pay attention to the reading of the megohmmeter and does not need to manually wire, which improves the measurement efficiency.

[0004] The technical problems to be solved by the utility model are realized by adopting the following technical solutions:

[0005] An insulation detection auxiliary device includes a box body. Inside the box body, there are a single-chip microcomputer, a left relay group connected to the single-chip microcomputer, and a right relay group. On the front side wall of the box body, there are operation buttons connected to the single-chip microcomputer, progress indicators that are connected to each other and connected to the left relay group and the right relay group. On the rear side wall of the box body, there are a power supply interface, a cable socket, and megohmmeter connection terminals connected to the left relay group and the right relay group.

[0006] As a further improvement of the utility model, both the left relay group and the right relay group include sixteen independent switches.

[0007] As a further improvement of the utility model, the operation buttons include a start button, a pause button, a previous step button, and a next step button.

[0008] As a further improvement of the utility model, there are fifteen progress indicators.

[0009] As a further improvement of the present utility model, the power interface is a 5V DC power interface.

[0010] As a further improvement of the present utility model, four megohmmeter terminals are provided.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The present utility model provides an insulation detection auxiliary device, which realizes the automation of the wiring process and can significantly shorten the time-consuming of the insulation detection work of the missile launch device. Through the structure of externally connecting a megohmmeter, compared with other insulation detection devices, the cost is reduced and the portability of the device is realized. The present utility model can realize a self-checking function, has a low failure rate, does not need to be regularly calibrated, and is suitable for field operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below with reference to the drawings and embodiments:

[0014] Figure 1 is the structural block diagram of the insulation detection auxiliary device of the present utility model;

[0015] Figure 2 is the schematic diagram of the front side structure of the insulation detection auxiliary device of the present utility model;

[0016] Figure 3 is the schematic diagram of the rear side structure of the insulation detection auxiliary device of the present utility model;

[0017] Figure 4 is the circuit diagram of the insulation detection auxiliary device of the present utility model;

[0018] Figure 5 is the schematic diagram of the test cycle principle of the insulation detection auxiliary device of the present utility model.

[0019] In the figure: 1, single-chip microcomputer; 2, left relay group; 3, right relay group; 4, operation button; 5, progress indicator light; 6, power interface; 7, cable socket; 8, megohmmeter terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below with reference to the drawings and embodiments.

[0021] As Figures 1 to 3 shown, an insulation detection auxiliary device includes a box body, a single-chip microcomputer 1, a left relay group 2, a right relay group 3, an operation button 4, a progress indicator light 5, a power interface 6, a cable socket 7, and a megohmmeter terminal 8.

[0022] The single-chip microcomputer 1 is arranged inside the box body, and the single-chip microcomputer 1 is used to implement various functions of the device. The left relay group 2 and the right relay group 3 are arranged inside the box body on the left and right sides of the single-chip microcomputer 1 respectively and are connected to the single-chip microcomputer 1. Both the left relay group 2 and the right relay group 3 include sixteen independent switches. The single-chip microcomputer 1 controls the closing or opening of the relays to control the positive or negative pole of the cable under test to be connected to the megohmmeter, and triggers the megohmmeter to start or stop the test. The operation buttons 4 are arranged on the front outer wall of the box body, including a start button, a pause button, a previous step button, and a next step button, which are distributed in sequence from left to right and are all connected to the single-chip microcomputer 1 for inputting operation signals. By pressing the operation buttons, the control operation process can be carried out. The progress indicator lights 5 are 15 common-anode-connected LED lamp beads, and the cathodes are connected to the signal input ends of the left relay group 2 and the right relay group 3, sharing the control signal transmitted by the single-chip microcomputer to achieve the purpose of displaying the operation progress. To implement the above functions, the specific circuit connection method is shown in Figure 4 . The 15 progress indicator lights 5 are correspondingly arranged on the front outer wall of the box body to display the progress of the test operation. When all the indicator lights light up and go out in sequence and cycle twice, it means that the test operation is completed.

[0023] The power interface 6 is arranged on the rear outer wall of the box body and is a 5V DC power interface for supplying power to the insulation detection auxiliary device.

[0024] The cable socket 7 is arranged on the rear outer wall of the box body and is used to connect the insulation detection auxiliary device to the wire under test through an adapter cable.

[0025] There are four megohmmeter terminals 8, which are correspondingly arranged on the rear outer wall of the box body for connecting the positive and negative test ports and the test signal line of the megohmmeter into the device.

[0026] The insulation detection auxiliary device controls the suction or disconnection of the relay through the single-chip microcomputer, and then controls the wire connected to the relay to be connected to the positive or negative pole of the megohmmeter for insulation detection. By controlling the access sequence and arrangement method of each wire, the purpose of automatic detection and reduction of the detection cycle is achieved. Taking a cable containing 30 wires as an example, the wire connection conditions in each detection cycle are as Figure 5 shown.

[0027] In cycle 1, the 1st to 15th wires are connected to the positive pole of the megohmmeter, and the 16th to 30th wires are connected to the negative pole of the megohmmeter. If the insulation detection is qualified at this time, it means that the insulation performance between any one of the 1st to 15th wires and all the wires of the 16th to 30th wires is qualified. Similarly, the insulation performance between any one of the 16th to 30th wires and all the wires of the 1st to 15th wires is also qualified;

[0028] In cycle 2, based on the previous cycle, change the connection of the first wire to the negative pole and the 30th wire to the positive pole, while keeping the rest unchanged. If the insulation test is qualified at this time, the insulation performance between the first wire and all the wires from the second to the 15th is qualified. Combining the measurement results of cycle 1, the insulation between the first wire and the wires from the second to the 30th is qualified. Similarly, the insulation performance between the 30th wire and the remaining wires is also qualified;

[0029] In cycle 3, based on the previous cycle, change the connection of the second wire to the negative pole and the 29th wire to the positive pole, while keeping the rest unchanged. If the insulation test is qualified at this time, the insulation performance between the second wire and all the wires from the third to the 15th is qualified. Combining the measurement results of cycle 1, the insulation between the second wire and the first, the third to the 30th wires is qualified. Similarly, the insulation performance between the 29th wire and the remaining wires is also qualified;

[0030] Until cycle 15, based on the previous cycle, change the connection of the 14th wire to the negative pole and the 17th wire to the positive pole, while keeping the rest unchanged. If the insulation test is qualified at this time, the insulation performance between any two of all 30 wires is qualified.

[0031] An insulation detection method, which applies the above-mentioned insulation detection auxiliary device, includes insulation detection and self-check. The insulation detection includes the following steps:

[0032] I. Connect the power supply: Connect to a 5V DC power supply through the power supply interface 6.

[0033] II. Connect the product to be tested: Select a suitable transfer cable and connect the cable to be tested to the cable socket 7 on the detection auxiliary device.

[0034] III. Connect the megohmmeter: Connect the positive and negative test ports and the trigger port of the megohmmeter to the megohmmeter terminal 8 on the detection auxiliary device.

[0035] IV. Press the start button in the operation button 4 to conduct the inspection.

[0036] V. Insulation judgment: During the operation of the detection, the operator should keep an eye on the reading of the megohmmeter, and the insulation resistance value of the cable should not be lower than the required value.

[0037] VI. Troubleshooting: During the operation of the detection, if the reading of the megohmmeter is lower than the required value, press the pause button in the operation button 4 to pause the operation. At the same time, cooperate with the previous step button and the next step button to manually control the inspection operation steps to run from step 0 to step 15 in sequence, and record the progress indicator light number corresponding to the abnormal megohmmeter reading to locate the faulty wire.

[0038] The self-check includes the following steps:

[0039] I. Connect the power supply: Connect to a 5V DC power supply through the power interface 6.

[0040] II. Connect the megohmmeter: Connect the positive and negative test ports and the trigger port of the megohmmeter to the megohmmeter terminal 8 on the detection auxiliary device.

[0041] III. Connect the transfer cable and the self-check plug: Connect the transfer cable to the cable socket 7 on the detection auxiliary device, and connect the self-check plug to the end of the transfer cable. All the wiring terminals of the self-check plug are short-circuited together for simulating a fault.

[0042] IV. Run the self-check: Press the start button in the left operation button 4 to start the self-check.

[0043] V. Monitor the device status: During the self-check operation, the operator should keep an eye on the reading of the megohmmeter. When at step 0, the megohmmeter starts to test and all the indicator lights are in the off state, the reading of the megohmmeter should show 550 MΩ. The progress indicator lights No. 1 to 15 light up and go out in sequence and cycle once, with a total of 30 times of lighting up and going out, corresponding to 30 steps in sequence. When the self-check runs to steps 1 to 30, the reading of the megohmmeter should always show 0 MΩ.

[0044] VI. Judge the self-check result: If the reading of the megohmmeter meets the requirements in step V, it indicates that the detection auxiliary device is running normally.

[0045] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An insulation detection auxiliary device, comprising a box, characterized in that: The box body is provided with a single-chip computer (1), a left relay group (2) and a right relay group (3) connected to the single-chip computer (1); the front wall of the box body is provided with an operation button (4) connected to the single-chip computer (1), and a progress indicator light (5) connected to each other and to the left relay group (2) and the right relay group (3); the rear wall of the box body is provided with a power supply interface (6), a cable socket (7) and a megohmmeter terminal (8) connected to the left relay group (2) and the right relay group (3).

2. An insulation detection auxiliary device according to claim 1, characterized in that: The left relay group (2) and the right relay group (3) both include sixteen independent switches.

3. The insulation detection auxiliary device according to claim 1, characterized in that: The operation buttons (4) include a start button, a pause button, a previous button, and a next button.

4. The insulation detection auxiliary device according to claim 1, characterized in that: The progress indicator lights (5) include fifteen in number.

5. The insulation detection auxiliary device according to claim 1, characterized in that: The power supply interface (6) is a 5V DC power supply interface.

6. The insulation detection auxiliary device according to claim 1, characterized in that: The megohmmeter binding posts (8) are provided in four numbers.

Images