Piezoelektrisk taktilåterkoppling i industriellabildskärmsdatorer

Sammanfattning: This project studies how tactile feedback can be implemented in existing CrossControl products,in this case the V1200-display computer. The main purpose of this function is to minimizedistraction for the user by implementing tactile feedback which creates the possibility for theuser to use the device without looking at the display. A key variable to achieve this function is tocreate a haptic button, by using a force detector where the vibration strength will be related tohow much force users have applied on the screen. This technology can be applied with a piezoelectric sensor and actuator which can be integratedinto the V1200-display device. When a user touches the screen, feedback will be initiated, andusers can feel the feedback in the form of vibration which will represent a button press. Threedifferent design ideas on how piezoelectric sensors will be implemented under the V1200device’s display has been studied to determine which is the most optimal design to create thebest vibration and consequently best feedback to the users. The final implementation of the new function does not have a force detection and has onlytactile feedback with a piezoelectric actuator which will receive a PWM signal from the V1200device touch display. The glass panel on the screen is not flexible because of its thickness,which will cause a non-readable display touch that is not reachable by the sensor. In conclusion, the demo product could be mounted with either two or three sensors, dependingon whether the economical- or the efficiency aspect is the target for the producer. Since bothaspects will still provide 2 g acceleration force in the z-axis along the screen resulting in asatisfactory feeling