The sensor (Tekscan A502FlexiForce sensor) is mounted in a hardened interface to provide accuracy in sensor readings. Thin, customizable FlexiForce sensors measure normal compressive forces. While every application is unique, there are some universal considerations and general best practices to consider to achieve optimal performance of the FlexiForce™ sensor. Providing the correct mechanical setting is important to assure the most accurate and repeatable measurements. CTC, with the advice of Tekscan engineers, utilized a puck and plate design for the CPR application. This decision was based on the following considerations from the Tekscan manual;
1. What is the contact area of the actuator relative to the sensing area of the sensor? If it’s much larger or smaller than the sensing area, using a puck will ensure optimal performance of the sensor.
2. Is the actuator loading the same area each time? If not, a puck is necessary.
3. What material should my puck be? Compliant and rigid interface materials can behave differently when it comes to linearity, hysteresis, sensor response, shear, etc. During the design phase, testing with different interface/puck materials should be performed to determine the ideal puck or interface material for your application.
With these factors in mind, a puck and plate design was developed for maximum sensor performance.
The Blue tooth interface we are currently using is designed and marketed by Myriad Sensors,a California company, and is fully FCC compliant.