热交换法测量皮下血流量的实验研究

Experimental Study of Measurement of Skin Blood Flow by Means of Heat Dissipation

利用热交换法进行皮下静脉微血管血流量测量的实验研究，这种方法在进行测量时可以。不损伤皮肤．叙述了热交换法的测量原理和测量系统的设计，测热探头的构造和工作原理以及传感元件的选择，并对误差放大器和温度刻度线性化电路以及相关关键参数的选择进行了重点说明，最后给出了测量系统的运行结果，据以分析系统的跟踪特性并进行系统优化讨论．

This paper deals with the experimental study of measurement of capillary blood flow by means of heat dissipation. Botter safty can be reached by using this method becauce no harm will be done to the skin as measurement is conducted. Measuring principle is at first introduced, together with the system design. Then the probe configuration and sensors are presented. More attention is paid to discussions of error amplifier, circuit of temperature-scale linearization, and selection of corresponding circuit parameters. Finally, based on the data obtained through experiment, track characteristics and optimization of the system are discussed.