Development of a commercially viable piezoelectric force sensor system for static force measurement. (21st August 2017)

• Record Type: Journal Article
• Authors: Liu, Jun; Luo, Xinwei; Liu, Jingcheng; Li, Min; Qin, Lan
• Is Part Of: Measurement science & technology. Volume 28:Number 9(2017:Sep.)
• Publication Date: 2017-08-21
• Subjects: piezoelectric -- force sensor -- static force measurement -- compensation method; Physical measurements -- Periodicals; Scientific apparatus and instruments -- Periodicals; Equipment and Supplies -- Periodicals; Science -- instrumentation -- Periodicals; Technology -- instrumentation -- Periodicals; Mesures physiques -- Périodiques; Physical measurements; Scientific apparatus and instruments; Periodicals; 502.87
• DOI: 10.1088/1361-6501/aa7dc0
• Languages: English
• ISSNs: 0957-0233

Abstract

Abstract: A compensation method for measuring static force with a commercial piezoelectric force sensor is proposed to disprove the theory that piezoelectric sensors and generators can only operate under dynamic force. After studying the model of the piezoelectric force sensor measurement system, the principle of static force measurement using a piezoelectric material or piezoelectric force sensor is analyzed. Then, the distribution law of the decay time constant of the measurement system and the variation law of the measurement system's output are studied, and a compensation method based on the time interval threshold Δ t and attenuation threshold Δ u t h is proposed. By calibrating the system and considering the influences of the environment and the hardware, a suitable Δ u t h value is determined, and the system's output attenuation is compensated based on the Δ u t h value to realize the measurement. Finally, a static force measurement system with a piezoelectric force sensor is developed based on the compensation method. The experimental results confirm the successful development of a simple compensation method for static force measurement with a commercial piezoelectric force sensor. In addition, it is established that, contrary to the current perception, a piezoelectric force sensor system can be used to measure static force through further calibration.