传感器又称变换器或换能器,它是将某物理量(主要是机械量或几何量),转换为另一物理量(主要是电学量)来进行测量的器件。其类型因测试对象而异。其中电阻应变式的各种传感器,自第二次世界大战以后,不但没有被日新月异的技术发展所淘汰,反而受到重视,得到发展,处于用途 Sensor is also called transducer or transducer. It is a device that converts a physical quantity (mainly mechanical quantity or geometric quantity) into another physical quantity (mainly electrical quantity) to measure. The type varies depending on the test object. Among them, all kinds of resistance-strain sensors have not been eliminated by the rapid technological development since the Second World War, but have been given attention to, developed and put to use