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Anti-interference key detection system and detection method

A detection system and detection method technology, applied in electrical components, pulse technology, electronic switches and other directions, can solve the problem of button false trigger rate or missed detection rate increase, reduce button detection accuracy and other problems

Active Publication Date: 2011-04-06
JIANGSU HUITONG GRP
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] During the above-mentioned button detection process, if there is interference from external environmental factors, such as noise interference generated by mobile phones and other electrical appliances, the false trigger rate or missed detection rate of the buttons will increase, thereby reducing the accuracy of button detection.

Method used

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  • Anti-interference key detection system and detection method

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Embodiment Construction

[0084] In the prior art, the button signal is directly detected, and the button signal may be caused by the interference of environmental noise resulting in the change of the electrical signal such as the charge, voltage, and capacitance of the button. It is not a real human touch action, resulting in false triggering of the button action. .

[0085] The technical solution first detects the background environmental signal, and only starts to detect the key when the signal is detected within the range of the first frequency to the second frequency, thereby greatly reducing the interference of environmental noise and improving the detection accuracy of the key action .

[0086] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0087] In the following description, specific details are set fort...

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Abstract

The invention relates to an anti-interference key detection system and a detection method; the detection system comprises a key, an environment detection unit, a key detection unit and a control unit, wherein the environment detection unit is used for detecting a background environment signal, shielding the signals beyond a range from a first frequency to a second frequency and generating triggering signals after the signals in the range from the first frequency to the second frequency are detected; the key detection unit is triggered by the triggering signals for detecting the keys, so as to obtain a keying signal; the control unit is triggered by the triggering signals and samples the keying signal, when the times for sampling the keying effective signals in a first time window reach or exceed the presetting times, a control signal is output; and in the invention, environment noise interference is reduced and the detection precision of the key action is improved.

Description

technical field [0001] The invention relates to electronic button technology, in particular to an anti-jamming button detection system and detection method. Background technique [0002] At present, various types of keys have been widely used in electronic products, among which capacitive touch keys are the most commonly used. The main principle of the capacitive touch button is that after the human body touches the button, it will change the charge on the button capacitor. Determine if a key touch action has occurred. The success rate of button detection directly affects the use of electronic products, and button detection usually refers to detecting the operation on a button to determine whether the button is pressed. [0003] The existing button detection method mainly includes the following basic steps: detecting the button and obtaining the button signal; sampling the button signal at a fixed frequency, and when the number of times the effective signal of the button i...

Claims

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Application Information

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IPC IPC(8): H03K17/16H03K17/967
CPCH03K17/967H03K2217/9658
Inventor 龙涛刘正东龙江
Owner JIANGSU HUITONG GRP
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