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介绍一种小型坚实的传感器,在接近1K 时,利用20nW 的电流激励,四线测定锗电阻温度计的电阻,准确度为1×65×10~(-3)。论述对低温和大气系统的限制。给出用微型计算机控制的混合模拟/数字设计。论及测试结果及未来的发展。
A small and robust sensor is introduced. The resistance of a germanium resistance thermometer is measured in four wires using a current of 20nW at approximately 1K, with an accuracy of 1 × 65 × 10 -3. Discusses the limitations of low temperature and atmospheric systems. A microcomputer-controlled hybrid analog / digital design is given. Discuss the test results and future development.