A Time Domain Dynamic Correction Method for Cable Measurement Error in Temperature Test

Abstract

The invention discloses a time-domain dynamic correction method for cable measurement errors in a temperature test. When radio frequency microwave products are tested in a laboratory, radio frequency cables are needed to be used for connecting the detected products with instruments. In order to guarantee accuracy of a product test, the cables must be tested singly before usage to obtain characteristic parameters of the cables, and errors introduced by the cables are corrected in a test system. But when the detected products enter a temperature chamber for a high-low temperature cycling test, the characteristic parameters of the radio frequency cables change along with high and low temperatures, and furthermore, the cables are already connected with the detected products and the instruments in the temperature chamber, single correction can not be carried out, so accuracy of the product test is lowered. By the aid of the method, a problem that the radio frequency test cables can't be tested during temperature cycling is solved, the real-time characteristic parameters of the radio frequency cables in a high-low temperature chamber can be acquired, the acquired cable parameters are used for correcting a test result, and accurate product test in a temperature cycling test can be achieved.

Description

technical field [0001] The invention relates to a time-domain dynamic correction method for cable measurement error in temperature test, realizes accurate test of satellite payload part and component products in temperature cycle test, corrects the error influence caused by testing connecting cable, and is suitable for various Satellite-like payload section, precise testing of component product temperature cycling. Background technique [0002] The satellite payload department and component products usually need to undergo a temperature cycle test. The purpose is to monitor whether the satellite payload department and component products work normally under the temperature alternating environment, and whether the technical indicators meet the overall requirements, so as to ensure the normal performance of the satellite in orbit. . In the microwave payload department, when the component products are subjected to temperature cycle tests, high-frequency test cables are often us...

AI Technical Summary

Problems solved by technology

The advantage of this method is real real-time compensation calibration. The disadvantage is the accuracy of the temperature data of the calibration piece. The calibration method when the calibration period of the automatic calibration piece itself expires is complicated and the calibration takes a long time. Moreover, the electronic switch and the calibration piece The lower temperature limit given is often not high enough, such as -40°C or even -25°C

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