由于航天工程的需要，為了對航天用紅外探測器進行環(huán)境應力篩選并研究器件在高低溫循環(huán)過程中的失效機理，本文提出了一種基于單片機控制的溫度循環(huán)試驗自動控制系統(tǒng)。單片機根據(jù)輸入的溫度傳感器信號控制電機運行，實現(xiàn)所考核器件在高低溫環(huán)境之間的循環(huán)運動。器件的監(jiān)測系統(tǒng)由計算機和數(shù)據(jù)采集卡組成，通過LabVIEW 編程實現(xiàn)。設備在實際應用中運行穩(wěn)定，能夠滿足工程要求。
關(guān)鍵 詞：單片機，溫度循環(huán)，步進電機，環(huán)境應力篩選
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