概述在血压自动测量中,如采用集成电路技术制成的压阻电桥作固体压力传感器,其温度漂移较大。为了保证测量精度,需要考虑零点补偿问题。过去多采用附加热敏电阻作补偿,但工艺较复杂,长时间运行后仍易产生零漂。改进方法及电路血压测量中一般袋压-时间曲线如图1所示。 Overview Automatic measurement of blood pressure, such as the use of integrated circuit technology made piezoresistive bridge for solid pressure sensors, the temperature drift larger. In order to ensure the measurement accuracy, we need to consider the zero point compensation problem. In the past more use of additional thermistor for compensation, but the process is more complex, long run still prone to zero drift. Methods and Circuits to Improve Blood pressure measurement in the general bag pressure - time curve shown in Figure 1.