一种称重传感器的性能研究.docVIP

一种称重传感器的性能研究 摘要 电阻应变式传感器是目前应用最广泛的传感器之一，已广泛地应用于航空、机械、电力、化工、建筑、医疗等领域中的力、压力、力矩以及位移、加速度等参数的测量。目前，无论在数量上还是在应用领域上，与其他传感器相比都具有重要的地位。其主要优点是结构简单，使用方便，灵敏度高，性能稳定，可靠，测量速度快，适合静态、动态测量。 本文先对传感器进行了介绍，它的定义，分类，特性有哪些，之后着重对电阻应变式称重传感器进行了分析，分析了电阻应变片的工作原理、温度特性及相应的补偿方法，并讨论电阻应变片的信号调理电路，随后给出了系统的整体框架。最后利用实验室的仪器进行电阻应变式称重传感器的各种性能测试，对实验结果进行统计和对比，给出传感器的几个主要性能并分析产生误差的原因。 实验结果表明: 在不同的时间或电桥电路测量中，传感器的输入输出具有较好的线性度和稳定性；灵敏度，分辨力视不同的电桥电路而有不同，双臂电桥优于单臂电桥，全桥又优于双臂电桥，可分辨的质量分别约为1克、0.5克、0.3克。温度是传感器的一个重要影响因素，但是可以用温度补偿的办法来尽量消减它的影响。 关键字：电阻应变片；电桥电路；称重传感器；传感器特性 The performance of a load cell research Abstract Resistance strain sensor is the most widely used one sensor has been widely used in aerospace, mechanical, electrical, chemical, construction, medical and other fields of force, pressure, torque and displacement, acceleration and other parameters measured. At present, in terms of quantity or in the application areas, compared with the other sensors have an important role. The main advantage is its simple structure, easy to use, high sensitivity, stable performance, reliable, measurement speed, suitable for static and dynamic measurements. In this paper, first introduced on the sensor, its definition, classification, characteristics of which, after the focus of resistance strain weighing sensor analysis, analysis of the resistance of the working principle of strain gauges, temperature characteristics and the corresponding compensation methods, and discuss resistance of strain gauge signal conditioning circuit, and then gives the overall framework of the system. Finally, the use of laboratory instruments to make the resistance strain sensor weighing the various performance tests, the experimental results and comparative statistics, given the sensor performance and analysis of several major causes of errors. The experimental results show that: at different times or bridge measurement circuit, the input and output sensors have good linearity and stability; sensitivity, depending on resolution of the bridge circuit