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Method for adjusting signal gain of acoustic wave touch screens

A technology of signal gain and adjustment method, which is applied in the direction of gain control, amplification control, and data processing input/output process, which can solve problems such as touch misjudgment and signal unevenness, achieve wide recognition, avoid data distortion, The effect of solving product defects

Inactive Publication Date: 2017-09-29
GENERAL TOUCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned problems in the prior art, and provide a signal gain adjustment method for an acoustic wave touch screen. The present invention can perform gain adjustment correspondingly according to the actual situation of the initial analog signal, so that all analog signals reach the set sampling value, improve the recognition sensitivity of the controller to the initial analog signal, and solve the problem that the surface acoustic wave touch screen in the prior art is prone to touch misjudgment due to uneven signals

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  • Method for adjusting signal gain of acoustic wave touch screens
  • Method for adjusting signal gain of acoustic wave touch screens
  • Method for adjusting signal gain of acoustic wave touch screens

Examples

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Embodiment 1

[0033] A signal gain adjustment method of an acoustic wave touch screen includes the following steps:

[0034] (1) Establish gain standard template

[0035] The establishment of the gain standard template includes the following steps:

[0036] S1: In any signal scanning period, the gain adjustable amplifier performs unified amplification processing on the initial analog signal from the receiving transducer;

[0037] S2: The ADC sampling module continuously samples the amplified initial analog signal to obtain multiple sampling data;

[0038] S3: Calculate the initial analog signal data before sampling of each sampled data according to each sampled data and unified magnification, and then calculate the gain value required for each initial analog signal data to be amplified to the set target value based on the obtained initial analog signal data , The gain value obtained is the gain standard template;

[0039] (2) Gain adjustment

[0040] In each subsequent signal scan period, the controll...

Embodiment 2

[0046] A signal gain adjustment method of an acoustic wave touch screen includes the following steps:

[0047] (1) Establish gain standard template

[0048] The establishment of the gain standard template includes the following steps:

[0049] S1: In any signal scanning period, the gain adjustable amplifier performs unified amplification processing on the initial analog signal from the receiving transducer;

[0050] S2: The ADC sampling module continuously samples the amplified initial analog signal to obtain multiple sampling data;

[0051] S3: Calculate the initial analog signal data before sampling of each sampled data according to each sampled data and unified magnification, and then calculate the gain value required for each initial analog signal data to be amplified to the set target value based on the obtained initial analog signal data , The gain value obtained is the gain standard template;

[0052] (2) Gain adjustment

[0053] In each subsequent signal scan period, the controll...

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Abstract

The invention discloses a method for adjusting signal gain of acoustic wave touch screens. The method includes steps of (1), establishing gain standard templates; (2), adjusting gain in particular gain adjusting procedures including outputting various gain values in the gain standard templates to gain adjustable amplifiers according to time sequences by controllers in each signal scanning cycle after the gain standard templates are established, correspondingly adjusting the gain of initial analog signals in the signal scanning cycles by the gain adjustable amplifiers according to the received gain values, sampling the initial analog signals with the adjusted gain by ADC (analog-digital conversion) sampling modules and outputting the initial analog signals with the adjusted gain to the controllers. The method has the advantages that the gain can be correspondingly adjusted according to actual conditions of the initial analog signals, accordingly, all the initial analog signals can have set sampling values, the initial analog signal identification sensitivity of the controllers can be enhanced, and the problem of easiness in touch misjudgment by surface acoustic wave touch screens due to uneven signals in the prior art can be solved.

Description

Technical field [0001] The invention belongs to the technical field of touch screens, and specifically relates to a signal gain adjustment method of an acoustic wave touch screen, and is particularly suitable for a gain adjustment method of an analog signal in a surface acoustic wave touch screen. Background technique [0002] ​Surface acoustic waves are mechanical waves that propagate along the surface of a medium. This kind of touch screen consists of a touch screen, a sound wave generator, a reflector and a sound wave receiver. The sound wave generator can send a high-frequency sound wave across the surface of the screen. When a finger touches the screen, the sound wave on the contact is blocked. Determine the coordinate position. The surface acoustic wave touch screen is not affected by environmental factors such as temperature and humidity. It has a high resolution, excellent scratch resistance, long life (50 million times without failure), and can maintain clear and bright...

Claims

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Application Information

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IPC IPC(8): G06F3/043H03G3/20
CPCG06F3/043H03G3/20
Inventor 郑伦见辜超
Owner GENERAL TOUCH CO LTD
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