Flow sensor calibration method and system

• Main Authors: CHEN ZHENXIN, CHENG QIXIN, ZHANG LIQIN
• Format: Patent
• Language: Chinese; English
• Published: 21.07.2017
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The invention relates to the field of medical monitoring device testing, and provides a flow sensor calibration method. The method comprises the following steps that 11, a differential pressure sensor is adopted for detecting differential pressures corresponding to multiple fluid flows, a flow-differential pressure curve within a testing range is obtained, and the fluid flows are detected through the flow sensor to be calibrated; 12, the testing range is segmented, fitting of the flow-differential pressure curve is performed within the multiple segmented testing ranges, multiple segmented fitting curves are obtained, and calibration coefficients are determine; the segmented fitting curves are simple linearity curves or quadratic linearity curves. The invention further provides a flow sensor calibration system adopting the calibration method. The flow sensor calibration efficiency is high, errors are small, and the consistency is high. 本发明涉及医用监护设备测试领域，提供了种流量传感器校准方法，包括以下步骤：S11、采用压差传感器检测多个流体流量下对应的压差，获取测试量程内的流量-压