由于航天工程的需要，為了對航天用紅外探測器進(jìn)行環(huán)境應(yīng)力篩選并研究器件在高低溫循環(huán)過程中的失效機(jī)理，本文提出了一種基于單片機(jī)控制的溫度循環(huán)試驗(yàn)自動控制系統(tǒng)。單片機(jī)根據(jù)輸入的溫度傳感器信號控制電機(jī)運(yùn)行，實(shí)現(xiàn)所考核器件在高低溫環(huán)境之間的循環(huán)運(yùn)動。器件的監(jiān)測系統(tǒng)由計算機(jī)和數(shù)據(jù)采集卡組成，通過LabVIEW 編程實(shí)現(xiàn)。設(shè)備在實(shí)際應(yīng)用中運(yùn)行穩(wěn)定，能夠滿足工程要求。
關(guān)鍵 詞：單片機(jī)，溫度循環(huán)，步進(jìn)電機(jī)，環(huán)境應(yīng)力篩選
Abstract: In order to accomplish the environment stress screen of space borne infrared detectors and study the failure mechanism during the course of thermal cycle, the thermal cycle system, based on singlechip is introduced in this paper. Based on the temperature signal, the step motor is controlled by singlechip and components would move circularly between high and low temperature environments. Testing and watching the components is accomplished by computer and DAQ card, programmed by LabVIEW. The equipment meets the requirement of project and runs stably in the experiment.
Key words: singlechip，thermal cycle，step motor，environment stress screen