Method and device for removing signal noise of piezoelectric sensor

Abstract

The invention provides a method and a device for removing signal noise of a piezoelectric sensor. The method comprises the following steps: acquiring element information of each element generating noise in the device; obtaining noise data generated by a corresponding element according to the element information, and obtaining a noise signal after the noise data is converted into an electric signalaccording to the noise data; converting an elastic wave signal generated by touch into an electric signal through a piezoelectric sensor to obtain a touch signal; and comparing the noise signal withthe touch signal to obtain touch data. Therefore, the noise interference of an electronic device using elastic waves can be greatly reduced, the accuracy of touch positioning is effectively improved,the applicability of an elastic wave touch positioning mode is enhanced, and the application range of the elastic wave touch positioning mode is widened.

Description

technical field [0001] The invention relates to the field of electromechanical interaction, in particular to a method and device for removing signal noise of a piezoelectric sensor. Background technique [0002] The main operations of electronic devices such as portable mobile phones and tablet computers that exist on the market are completed through touch screens. The touch screen is becoming more and more popular because of its ease of operation and lower and lower prices. The unique advantage of the touch screen is that it can help users achieve the same operation purpose without frequently moving the mouse and tapping the keyboard. The composition of the touch screen generally includes a touch panel, a touch response component, a touch control system, and a driver. The technical solutions mainly used in touch response components include resistive type, capacitive type, infrared type, surface acoustic wave type, etc. In addition to their own technical limitations, these ...

AI Technical Summary

Problems solved by technology

The technical solutions mainly used in touch response components include resistive type, capacitive type, infrared type, surface acoustic wave type, etc. In addition to their own technical limitations, these technical solutions have a common disadvantage, that is, they are usually planar structures or similar The planar structure also has restrictions on materials, such as capacitive technology cannot be compatible with metal materials, and resistive technology cannot be compatible with harder materials

[0003] In order to overcome this problem, the industry has proposed an elastic wave sensing element that uses the elastic wave generated by touch as an input method, so that the touch position on the operation panel can be obtained by using these sensing elements and related algorithms, so as to achieve Efficacy of the touch screen; although this method can effectively overcome the above problems, the use of elastic wave components in practical applications has technical problems that do not exist in ordinary touch screens such as capacitive screens, which have not been considered by industry personnel. For example, the device using the elastic wave touch screen The existing vibration and noise problem, the noise problem in the actual use of the elastic wave touch screen will more or less limit the recognition accuracy of the touch position, and affect the effective promotion of the elastic wave touch screen

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