热敏电阻接入惠斯顿电桥的装置改进

Improvement of the Device for Connecting Thermistor to Wheatstone Bridge

为解决热敏电阻接入电路以及瞬时温度准确测量的难题,研究改进了惠斯顿电桥电路装置,并论证了自然降温法在测量热敏电阻温度特性中的必要性。教学实践表明,改进的电路装置并未影响原定的教学培养目标,新装置的使用可以培养学生采集瞬时数据的能力。此外,该装置的使用不仅降低了实验教学成本,还能提高实验员课前实验准备工作的效率。

To solve the problem of connecting thermistor into the circuit and accurately measuring the instantaneous temperature,an improved circuit device of Wheatstone bridge has been proposed.The necessity of natural cooling method in measuring the temperature characteristics of thermistor has been demonstrated.The practice in teaching showed that the improved circuit device did not affect the original teaching and training objectives,and the use of this new device could cultivate students’ability of collecting instantaneous data.In addition,this new device not only reduces the cost of experimental teaching,but also improves the efficiency of experimental preparation before class.