由于高頻電磁場對溫度測量造成的嚴重干擾, 在微波場下的溫度測量一直是測量與控制領域難以解決的一個技術難題。文章給出使用熱敏電阻- 高阻導線組成抗電磁干擾的溫度傳感器結構以解決這個難題, 并重點介紹它的設計方法。這種傳感器已成功地應用于醫院部門的微波熱療機的生產, 其抵抗強電磁波干擾的特性令人滿意。
關鍵詞: 微波場測溫; 熱敏電阻- 高阻導線溫度傳感器; 抗電磁干擾
Abstract : As a result of high frequency electromagnetic wave serious interference , measure temperature in microwave field all along being an difficult problem belongs to the measure and automatic domain. Here advances an temperature sensor structure which make use of Thermistor - High Resistance Conductors to resolve this problem fairly good , and the article puts emphasis on method how to realize this structure. This temperature sensor has been applied to produce microwave heat - therapy medical in2 struments for hospital , its characteristics of resist strong electromagnetic wave interference is satisfactory.
Key words : measure temperature in microwave field ; temperature sensor which make use of thermistor - high resistance conductors ; resist strong electromagnetic wave interference