Error Control Method for Alignment and Detection of Extracorporeal Coagulation Dynamic Detection Sensor

doi:10.3901/JME.2021.20.057

Abstract

Abstract: It is necessary to establish a control method to solve the problem of reduced accuracy caused by the errors in alignment and detection of extracorporeal coagulation detection sensor. Based on the working principle and structural characteristics of the sensor, the key errors in the installation and measurement are analyzed. Through theoretical analysis, the control formula for the elastic support of the core component and the alignment error of the mechanical probe is obtained, which is used to establish the error analysis control device and explore the relationship between the sensor amplitude change before and after the elimination. The finite element numerical analysis method is applied to analyze the sensor's detection position and inclination error and calculate the relationship between the amplitude change with detection error. The results of the error elimination experiment indicate that the elastic support alignment error, probe alignment deflection error, and detection centering error have effects on the sensor amplitude of 8.263 Pa, 9.56 Pa, and 11.28 Pa, respectively. The final alignment and detection error of the system is 16.999 Pa, which is less than the 21.85 Pa required for the resolution of the extracorporeal coagulation detection sensor. Therefore, this system can ensure the accuracy of extracorporeal coagulation detection. The proposed error control method for alignment and detection of extracorporeal coagulation dynamic detection sensor is verified to meet the requirements of sensor error analysis, provide technical support for improving sensor production technology and product quality, and play an important role in improving clinical coagulation rapid detection technology.

Key words: coagulation detection, sensor, elastic support, alignment deviation, error control

CLC Number:

TH165

WANG Zhe, YU Yuanhua, MENG Xiangkai, YU Zhanjiang, SUN Hao, CHEN Qimeng. Error Control Method for Alignment and Detection of Extracorporeal Coagulation Dynamic Detection Sensor[J]. Journal of Mechanical Engineering, 2021, 57(20): 57-67.

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