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Multi-point touch control method for digital oscilloscope touch screen

A digital oscilloscope and multi-touch technology, which is applied in the direction of electrical digital data processing, data processing input/output process, instruments, etc., can solve the problem of single-point touch on an external touch screen, and achieve the effect of improving highlights and convenient operation methods

Inactive Publication Date: 2016-12-21
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the external touch screen of the existing digital oscilloscope can only be touched by a single point, the present invention provides a multi-touch method for the touch screen of the digital oscilloscope

Method used

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  • Multi-point touch control method for digital oscilloscope touch screen

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Embodiment Construction

[0018] The present invention is specifically described below in conjunction with accompanying drawing:

[0019] combine figure 1 , a multi-touch method for the touch screen of a digital oscilloscope. The digital oscilloscope is externally connected with a touch screen through a USB interface. The touch screen is a capacitive touch screen. The digital oscilloscope adopts the Windows7 operating system, which can automatically identify the touch screen without driver installation. If the system cannot recognize the touch screen , you can install the driver provided by the touch screen manufacturer.

[0020] Multi-touch methods for touch screens include:

[0021] Step 1: Initialize, use the system function GetSystemMetrics(SM_DIGITIZER) to detect whether the touch screen is connected to the oscilloscope. The function GetSystemMetrics(SM_DIGITIZER) is a function that comes with the system. If the capacitive touch screen is connected to the oscilloscope, use the system function Get...

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Abstract

The present invention provides a multi-point touch control method for a digital oscilloscope touch screen. A digital oscilloscope is externally connected to a touch screen by using a USB interface, wherein the touch screen is a capacitive touch screen, and the digital oscilloscope uses a Windows 7 operating system, which may automatically recognize the touch screen and is installed without a driver. If the system cannot recognize the touch screen, a drive program provided by a touch screen manufacturer may be installed. According to the present invention, a touch control point parameter is received by using a message function of Windows, and a user operation gesture is judged according to an algorithm, to implement functions of waveform horizontal zooming and sliding and vertical zooming and translation, thereby providing a user with a more friendly and convenient manner and improving product highlights.

Description

technical field [0001] The invention relates to the field of digital oscilloscopes, in particular to a multi-touch method for a touch screen of a digital oscilloscope. Background technique [0002] In digital oscilloscopes, in order to facilitate the use of users and provide a friendly operation interface, an external touch screen is often used. Touch screens mainly include two types: resistive and capacitive. Resistive touch screens work by pressure sensing. The physical position of the touch point (X, Y) in the rectangular area is converted into a voltage representing the X coordinate and Y coordinate, and the electrical signal is sent to the processor through the conversion circuit, and converted into the X and Y coordinate values ​​on the screen through calculation. The cost of resistive touch screen is relatively low. If it is designed as multi-touch, when two points are pressed at the same time, the pressure on the screen will become unbalanced, resulting in errors i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044G06F3/041
CPCG06F3/044G06F3/0416G06F2203/04104
Inventor 向前刘洪庆吴恒奎
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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