Line insulation testing system

Abstract

The invention discloses a line insulation testing system, comprising a signal leading-in connecting unit, an analog switch controlling unit, a test voltage generating unit, a testing circuit unit, a data processing unit, a data storage and display unit and a serial data communications unit; the characteristics are as follows: the analog switch controlling unit utilizes the connecting/disconnecting of the switch to realize the electrical connection between the tested signal and the testing circuit, one end of the test voltage generating unit is electrically connected with the tested signal leading-in connecting unit, the other end is electrically connected with a standard resistor, the standard resistor is connected with the tested signal leading-in connecting unit in serial, voltage at both ends of the standard resistor is collected, then, data is processed through a central control unit, and the test result is obtained. Meanwhile, the connecting/disconnecting of the analog control switch, the control of charging and outputting of direct voltage source, the data storage display and the data communication are all centralizedly controlled by the central control unit. Compared with the prior art, the insulation testing system provided by the invention avoids constantly changing the connection relationship between the instrument measurement terminal and two pins of the tested signal during every testing, and realizes the automatically switching of the signal. The invention adopts DSP as a controller of the system, the self-bringing rich logic control units are convenient to write a timing control circuit and a data processing program, the corresponding control targets are easy to realize, and the design work is greatly simplified.

Description

technical field [0001] The invention belongs to the field of space vehicle vacuum thermal test measurement, and in particular relates to an insulation test system. Background technique [0002] During the satellite vacuum thermal test, external heat flow heating cables and temperature measurement cables are required. The heating cables are used to apply the output current of the programmable power supply to the heating load, and the measurement cables are responsible for transmitting the signals of the temperature sensors to the data acquisition system. Usually, the plug of the heating cable is Y2-36ZJ, and the plug of the measuring cable is Y2-50ZJ, so there are dozens of wires welded to the plug of the cable in each cable, and each wire corresponds to an external heat flow temperature control loop or a The temperature measurement channel loop, the space distance between the wires is very close. Due to the technical level, the internal conductors of the newly produced cabl...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome some problems existing in the prior art, and provide a kind of line insulation testing device, aim to solve, when the vacuum thermal test preparatory stage carries out the line insulation test to the cable used for the test, the test amount is large, The problem of heavy manual operation and low work efficiency

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