Digital electric bridge-based resistive touch screen additional control circuit and method

Abstract

The invention discloses a digital electric bridge-based resistive touch screen additional control circuit and method. The circuit comprises a buzzer detection circuit, a processor, an upper communication interface circuit, a lower communication interface circuit, a digital electric bridge and a relay. According to the circuit and the method, instruments or apparatuses which do not have communication control interfaces or cannot obtain control interface communication protocols and use resistive touch screens as man-machine interfaces are transformed by adoption of an additional form. Through aparallel manner, four-core connection wires of touch screen interfaces and two-core connection wires of buzzers in the instruments or apparatuses are led out, operations carried out on touch screens by human bodies are simulated through the digital electric bridge and the relay, and the working states of the instruments or apparatuses are detected according to the buzzer detection circuit, so thatthe instruments or apparatuses can have an unattended function without changing the original functions.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to an additional control circuit and control method for a resistive touch screen based on a digital bridge. Background technique [0002] Resistive touch screens are widely used in man-machine interfaces of various industrial control equipment and instruments due to their characteristics of adapting to harsh working environments, being able to touch with any object, and having good stability. Most instruments and equipment have GPIB, LAN, serial communication and other interfaces, which can realize information exchange and remote control functions. However, some imported instruments or equipment do not provide various communication control interface protocols or turn off communication control functions due to restricted user functions. For example, the SR800 black body of Israel CI company, the manufacturer refuses to provide the communication control interface protocol of the resi...

AI Technical Summary

Problems solved by technology

However, some imported instruments or equipment do not provide various communication control interface protocols or close the communication control function due to the restriction of user functions.

For example, the SR800 black body of Israel CI company, the manufacturer refuses to provide the communication control interface protocol of the resistive touch screen, and can only work in the form of manual operation of the touch screen, and cannot be connected to the assembly line to realize automatic control

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