Cable on-off rapid testing device

Abstract

The invention discloses a cable on-off rapid testing device which comprises a signal output acquisition matrix module, a lower computer main control module, a USB communication module and an upper computer program processing, judging and displaying module. The signal output acquisition matrix module selects each signal point in one dimension as an excitation signal point and the other dimension as an acquisition signal point by using a two-dimensional matrix principle, the outer end of the signal output acquisition matrix module is a connector interface, and during testing, a satellite cable enables a communicated node of the satellite cable to be communicated with the excitation end signal point and the acquisition end signal point corresponding to the excitation end signal point; a two-dimensional level related intersection point position has a response, so that the original conduction information of the satellite cable is acquired; manual pin insertion measurement is not needed any more, the safety is improved, the test method is simplified, and the test efficiency is improved. Meanwhile, measurement work can be completed by one person, manpower resources are reduced, measurement data can be directly interpreted and output test results, and whether cable conduction results are consistent with data sheet requirements or not and abnormal items are given.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic continuity and insulation testing of satellite cables, and specifically to a cable continuity rapid testing device, and in particular to a device for automatic continuity and insulation testing of satellite cables. It is suitable for checking the correctness of nodes before acceptance or use of onboard or ground low-frequency cables of mass-produced satellites. It is also suitable for regular inspection or damage inspection of ground low-frequency cables fixedly laid in test sites. Background Art

[0002] At present, the cable testing and inspection of mass-produced satellites basically relies on manual measurement of the conduction between nodes of different electrical connectors of a cable and the insulation between node shells of the same electrical connector nodes. The corresponding nodes on the satellite cable are measured in sequence using a multimeter and measurement tools such as pins and sockets. There are the following defects:

[0003] 1. Safety. The aviation plug of the satellite cable electrical connector has a limited plug-in and pull-out service life. When using the pin and socket test, a single node needs to undergo a large number of plug-in and pull-out operations. Due to the non-rigid properties of the pins and sockets inside the electrical connector, the asymmetric force direction during plugging and pulling out can cause bending of the plug or socket, which can cause mechanical damage inside the pin and plug, leaving potential safety hazards.

[0004] 2. Operability: The satellite cable conductivity and insulation test is carried out according to the node correspondence in the data sheet. The insulation test requires that all nodes inside the electrical connector are not conductive to each other. The cable conductivity and insulation test requires traversing all nodes, and the test operation is complicated and cumbersome.

[0005] 3. Test efficiency. Each test requires three people. One person reports the onboard cable measurement node based on the interface data sheet, and the other two are responsible for operation. This is inefficient and results in a serious waste of human resources.

[0006] 4. Test tools: The pin sockets are small and easy to lose, and the plugs need to be soldered on the wires and connected to the multimeter pen before use. The test tools also need to be prepared before testing. Summary of the invention

[0007] The purpose of the present invention is to provide a cable continuity quick test device, which is a new type of cable conduction insulation automatic test device, which changes from the original manual measurement to automatic measurement and outputs the test result data, and no longer requires manual pin measurement, which improves safety, simplifies the test method, and improves the test efficiency. At the same time, the measurement work can be completed by one person, reducing human resources, and the measurement data can be directly read and output the test results, giving whether the cable conduction results are consistent with the data sheet requirements and abnormal items.

[0008] The technical solution of the present invention is: a cable on-off rapid test device, comprising a power supply module, a signal output acquisition matrix module, a lower computer main control module, a USB communication module and an upper computer program processing judgment display module;

[0009] The lower computer main control module is used for the control and collection of input and output signals, and the processing of measurement signal data and control information;

[0010] The USB communication module is the basis for the communication between the lower computer main control module and the upper computer program processing judgment display module, and sends the control signal of the upper computer program processing judgment display module to the lower computer main control module through the USB communication protocol, and sends the measurement result data collected in large quantities by the lower computer main control module to the upper computer program processing judgment display module for processing and collection and storage;

[0011] The signal output acquisition matrix module uses the principle of a two-dimensional matrix, selects each signal point in one dimension as an excitation signal point, and the other dimension as a collection signal point. The outer end of the signal output acquisition matrix module is a connector interface. During the test, the satellite cable will connect its own connected nodes corresponding to the excitation end signal point and the collection end signal point, and the relevant intersection points on the two-dimensional layer will respond, thereby realizing the collection of the original conduction information of the satellite cable;

[0012] The upper computer program processing judgment display module is used to process the satellite cable interface data sheet, convert the satellite cable design data information into communication and insulation data information, receive the cable measurement raw data sent by the lower computer main control module through the USB protocol, and convert it into communication and insulation data information after deframing, so as to compare it with the theoretical communication information of the satellite cable design to obtain the correctness of the physical satellite cable.

[0013] Furthermore, the power supply module provides DC power supply to each module of the entire device, converts AC power from the mains into +12V DC power, and performs noise interference filtering.

[0014] The beneficial effect of the present invention is to provide a cable continuity rapid testing device. The original satellite's entire low-frequency cable is tested by personnel using a multimeter's resistance measurement function, with positive and negative test leads measuring point-to-point continuity at each node at both ends of the cable, and then measuring at one end of the cable whether a single node is disconnected from other nodes at that end.

[0015] 1. The present invention can solve the safety problem of on-board cable insulation testing of satellites. The tester has no contact with the aviation plug pin, and the connection is operated once without repeated plugging and unplugging. The connection is direct plugging and unplugging of male and female electrical connectors of the same model and specification, without the hidden danger of bending the pin and socket.

[0016] 2. The invention can solve the problem of complicated operation. It is a portable measuring device. Male and female electrical connectors of the same model and specification are connected correspondingly. The test can be completed and the data can be output within a few seconds.

[0017] 3. The present invention can solve the problem of waste of human resources of testers, and only one person is required to perform the test operation to complete the on-board cable conduction and insulation test.

[0018] 4. The present invention can solve the problem of complicated test tools. For all test cables on a single satellite of mass production, they can be used until all satellites are launched. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structure diagram of the cable continuity quick test device;

[0020] Figure 2 This is a schematic diagram of the signal output acquisition matrix module;

[0021] Figure 3 Display interface for the host computer;

[0022] Figure 4 This is a schematic diagram of the test interface. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] The conduction insulation test device is mainly composed of a power supply module, a signal output acquisition matrix module, a lower computer main control module, a USB communication module, and an upper computer program processing judgment display module. The overall structure diagram is shown in Figure 1 .

[0025] The power supply module of the conduction insulation test device mainly provides DC power supply for each module of the entire device, converts the AC power of the mains into +12V DC power, and performs filtering processing such as noise interference. The lower computer main control module is mainly used for the control and acquisition of input and output signals, and the processing of measurement signal data and control information. The USB communication module is the basis for the communication between the lower computer and the upper computer. The control signal of the upper computer is sent to the lower computer through the USB communication protocol, and the measurement result data collected by the lower computer is sent to the upper computer for processing and acquisition storage.

[0026] The signal output acquisition matrix module uses the principle of two-dimensional matrix, selects each signal point in one dimension as the excitation signal point, and the other dimension as the acquisition signal point. The outer end of the signal output acquisition matrix module is the connector interface. During the test, the satellite cable will connect its own connected nodes corresponding to the excitation end signal point and the acquisition end signal point. The relevant intersection points on the two-dimensional level will respond, thereby realizing the acquisition of the original conduction information of the satellite cable. The structure diagram of the signal output acquisition matrix module is shown in Figure 2 .

[0027] The upper computer program processes the judgment display module, which is used to process the satellite cable interface data sheet, convert the satellite cable design data information into communication and insulation data information, receive the cable measurement raw data sent by the lower computer main control module through the USB protocol, and convert it into communication and insulation data information after deframing, so as to compare it with the theoretical communication information of the satellite cable design to obtain the correctness of the satellite physical cable. The upper computer display interface is shown in Figure 3 .

[0028] The test device interface connector and its structure, according to the connector model of different satellite cables at both ends, lead out nodes from the excitation end and the collection end, and then connect to the connector that can match the satellite cable connector. The number and type of connectors at the excitation end and the collection end of the device are designed according to the satellite cable interface data sheet. See the schematic diagram Figure 4 .

[0029] The test device is designed and deployed with two rows of a large number of electrical connectors on the front panel. The power supply interface and USB interface are reserved on the side of the test device. The power supply is supplied to the lower computer device through an adapter. The USB interface of the lower computer is connected to that of the upper computer through a USB extension cable. The lower computer device is powered on, the upper computer software is started, and the upper and lower computer communication and the lower computer device self-test are performed. After the self-test status is correct, the connectors at both ends of the cable are connected to both sides of the test device during the test. The upper computer performs the test operation, and the signal output acquisition matrix module outputs the collected test result electrical signal to the lower computer main control module. The lower computer main control module preliminarily processes the result data and frames it, and sends it to the upper computer software through the USB communication module. The upper computer program processing and display software combines the data processing with the cable interface data sheet to make a conductive insulation judgment on the test result. The software outputs the judgment result, displays the cable test result, and highlights the abnormal result.

[0030] The present invention is a new type of automatic cable insulation test device, which changes from the original manual measurement to automatic measurement and outputs the test result data, and no longer requires manual pin measurement, which improves safety, simplifies the test method, and improves the test efficiency. At the same time, the measurement work can be completed by one person, reducing human resources, and the measurement data can be directly read and output the test results, giving whether the cable conductivity results are consistent with the data sheet requirements and abnormal items.

[0031] Applicable to the onboard or ground low-frequency cables of mass-produced satellites, node correctness inspection before acceptance or use. Regular inspection or damage inspection of ground low-frequency cables fixedly laid in the test site.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cable continuity quick test device, characterized by: It includes a power supply module, a signal output acquisition matrix module, a lower computer main control module, a USB communication module and an upper computer program processing judgment display module; The lower computer main control module is used for the control and collection of input and output signals, and the processing of measurement signal data and control information; The USB communication module is the basis for the communication between the lower computer main control module and the upper computer program processing judgment display module, and sends the control signal of the upper computer program processing judgment display module to the lower computer main control module through the USB communication protocol, and sends the measurement result data collected in large quantities by the lower computer main control module to the upper computer program processing judgment display module for processing and collection and storage; The signal output acquisition matrix module uses the principle of a two-dimensional matrix, selects each signal point in one dimension as an excitation signal point, and the other dimension as a collection signal point. The outer end of the signal output acquisition matrix module is a connector interface. During the test, the satellite cable will connect its own connected nodes corresponding to the excitation end signal point and the collection end signal point, and the relevant intersection points on the two-dimensional layer will respond, thereby realizing the collection of the original conduction information of the satellite cable; The upper computer program processing judgment display module is used to process the satellite cable interface data sheet, convert the satellite cable design data information into communication and insulation data information, receive the cable measurement raw data sent by the lower computer main control module through the USB protocol, and convert it into communication and insulation data information after deframing, so as to compare it with the theoretical communication information of the satellite cable design to obtain the correctness of the physical satellite cable.

2. A cable continuity quick test device according to claim 1, characterized in that: The power supply module provides DC power supply for each module of the entire device, converts AC power into +12V DC power, and performs noise interference filtering.

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