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美国John H.Laub博士根据中国中医脉象诊断疾病的启示设计了一种脉象仪。其皮肤表面桡动脉的脉压范围为0.1—1.0mmHg。脉象仪的关键部件是研制一种适合上述脉压范围的压力换能器。Laub博士研制的这种专用换能器,还解决了因手臂移动、人体活动、外界电信号等所产生的干扰。其基本结构如下:待测定的压力传递到一凹形膜上,该膜与一弯曲的耦合晶片相连,装有晶体的第二层膜置于第一层膜的后面,不直接与待测的压力接触,其电压输出与第一
Dr. John H. Laub from the United States designed a pulse-measuring device based on the implications of the Chinese medical pulse diagnosis of disease. The radial surface of the radial artery pulse pressure range of 0.1-1.0mmHg. The key component of the pulse recorder is to develop a pressure transducer that is suitable for the above pulse pressure range. This special transducer developed by Dr. Laub also solves the interference caused by arm movement, human activities, external electrical signals and the like. The basic structure is as follows: the pressure to be measured is transmitted to a concave membrane which is connected to a curved coupling wafer, a second membrane with crystals placed behind the first membrane and not directly connected Pressure contact with the voltage output of the first