An aircraft activation resistance measurement system and method

Abstract

The invention discloses an aircraft activation resistance measuring system and method. The system comprises a digital multimeter, a plurality of measurement channels, a switch array, a short circuit calibration plug, an equivalent cable, a thermometer, and a processing module, wherein the digital multimeter communicates with one of a plurality of measurement channels or the equivalent cable through the opening and closing of the switch array, so as to measure the resistance of the to-be-measured activation resistor or the equivalent cable, which is recorded via the processing module; a guide wire is arranged in the short circuit calibration plug corresponding to the measurement channel; when the short circuit calibration plug is connected with the measurement channel, the digital multimeter communicates with the measurement channel to measure the cable resistance of the measurement channel, which is recorded by the processing module; the thermometer is used for measuring the environment temperature, which is recorded via the processing module; and the processing module carries out processing according to the recorded measurement data so as to obtain an actual value of the to-be-measured activation resistor.

Description

technical field [0001] The invention relates to the field of resistance measurement. More specifically, it relates to an aircraft activation resistance measurement system and method. Background technique [0002] During the test process of the aircraft, it is necessary to measure various types of activation resistance, including the internal activation resistance of various specifications of thermal batteries, propellants, separation devices, etc. The measurement results are related to whether the product can be activated normally and affect the performance of the aircraft. important parameters. Since the resistance value of the activation resistor is relatively small, its measurement accuracy requirement is relatively high. In the early design of measuring equipment, digital multimeters were generally used for direct measurement, using a two-wire method, first measuring the resistance of the entire loop, and subtracting the measured cable resistance from the result obtain...

AI Technical Summary

Problems solved by technology

Its main disadvantage is: during the measurement process, the resistance value measured by each loop is its own actual value, but the cable resistance value that needs to be subtracted is the cable resistance value of the same pre-designed loop, while In fact, because the cable resistance of each circuit is different, it is because of the difference in the resistance of the cable wire length, the difference in the resistance of the solder joint between the cable and the connector and the switch, and at the same time, due to the influence of temperature, The cable resistance will change, and this difference will be magnified. In the case of a narrow range of measurement results, it is often close to the upper and lower limits of the criterion or out of tolerance. However, after confirmation by other methods, the measured product is often no problem

However, since there are still a large number of old equipment, direct abandonment and scrapping will cause large economic losses, and an economical and effective way is needed to eliminate this error

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