概述生物医学传感器(换能器)是将生理参数(或生理现象)转换为其他工程上容易测定的量(一般是电量)的装置。它是生物医学测量、诊断、治疗、数据处理等工作中不可缺少的关键元件。传感器的特性,往往决定了整个测量系统的特性。生物医学传感器的主要用途有三:第一,是对生物体进行检查,以深入了解生理功能或进行正确诊断。第二,是监护,即测定生理参数是否处于规定的范围以内,以便观察病体复原过程,或在出现异常时及早报警。第三,是控制,即利用检测到的生理信息控制生理过程。虽然医用传感器的测定对象是生理参数,但这些 Overview Biomedical sensors (transducers) are devices that convert physiological parameters (or physiological phenomena) to other easily measurable quantities (typically electrical). It is an indispensable key element in biomedical measurement, diagnosis, treatment and data processing. The nature of the sensor often determines the characteristics of the entire measurement system. The main uses of biomedical sensors are three: First, the organism is examined to gain insight into physiological functions or to make the correct diagnosis. Second, monitoring is the determination of physiological parameters are within the prescribed range or in order to observe the recovery process, or in the event of anomaly early warning. The third is control, which uses the detected physiological information to control the physiological process. Although the measurement object of the medical sensor is a physiological parameter, these are the same