Implementation of force sensor with multi strain gauges for enhancing accuracy and precision

A force sensor using strain gauges is widely used in many mechanical measuring systems. A method of measuring force and contact point using two gauges is available although it rather limited to extension of micro scale measurement. In order to overcome this limitation and to maximize a precision of the strain gauge sensor, sensor structure was optimized. Also, we used Kalman filtering for increasing an accuracy. It significantly increase the signal to noise ratio and stability of the sensor. This force sensor using strain gauges will be applied to diverse fields such as inspecting a micro system or manipulating small devices.