Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 52 5 2019 01 28 Design and Simulation of a Dual-State Quartz Resonator Force Sensor Design and Simulation of a Dual-State Quartz Resonator Force Sensor 1273 1284 3250 10.22060/mej.2019.14857.5960 FA Mohammad Mostafa Mohammadi mechanical engineering department/faculty of engineering/ Zanjan University Journal Article 2018 08 19 Quartz crystal is a piezoelectric material which is used as the sensing element in resonator load cells and temperature sensors. In the resonator force sensors, upon force-frequency effect, the resonance frequency of the quartz crystal is changed when the crystal is subjected to external forces. The amount of frequency shift depends on the temperature of the crystal. In this article, a new quartz resonator force sensor is designed and simulated. The sensor is working based on the force[1]frequency effect and has two working states with different loading conditions. At the first state, the force sensitivity of the sensor is maximum, and at the second loading state, the temperature effect on the force sensitivity may be minimum. The frequency shift of the load sensor is calculated by the combination of the mathematical modelling and finite element method. The simulations are performed at a temperature range of (0-100 °C). The effect of force azimuth angles and the length of flats of the resonator disk on the force sensitivity and temperature error of the sensitivity are evaluated. The designed double state sensor gives us the opportunity to increase the resolution and precision of force measurement at room temperature, and reduce the thermal error at other temperatures. Quartz crystal is a piezoelectric material which is used as the sensing element in resonator load cells and temperature sensors. In the resonator force sensors, upon force-frequency effect, the resonance frequency of the quartz crystal is changed when the crystal is subjected to external forces. The amount of frequency shift depends on the temperature of the crystal. In this article, a new quartz resonator force sensor is designed and simulated. The sensor is working based on the force[1]frequency effect and has two working states with different loading conditions. At the first state, the force sensitivity of the sensor is maximum, and at the second loading state, the temperature effect on the force sensitivity may be minimum. The frequency shift of the load sensor is calculated by the combination of the mathematical modelling and finite element method. The simulations are performed at a temperature range of (0-100 °C). The effect of force azimuth angles and the length of flats of the resonator disk on the force sensitivity and temperature error of the sensitivity are evaluated. The designed double state sensor gives us the opportunity to increase the resolution and precision of force measurement at room temperature, and reduce the thermal error at other temperatures. https://mej.aut.ac.ir/article_3250_2b9460dc096590cc76ec99f1cb1bb18e.pdf