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Force measuring method for conductor pushing capacitance-type sensor

A capacitive sensor, measurement method technology, applied in the direction of measuring force, measuring device, instrument, etc.

Inactive Publication Date: 2009-02-18
GENERALPLUS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, capacitive sensors are currently limited to applications that detect whether a conductor is in contact
Capacitive sensors have no other application in prior art

Method used

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  • Force measuring method for conductor pushing capacitance-type sensor
  • Force measuring method for conductor pushing capacitance-type sensor
  • Force measuring method for conductor pushing capacitance-type sensor

Examples

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Embodiment Construction

[0027] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below and described in detail with accompanying drawings.

[0028] In some specific applications, such as the application of amusement equipment or toys, etc., it may be necessary to sense the force of the conductor (such as a finger) pressing the capacitive sensor. Generally, the force of a conductor, especially a human finger, pressing the sensing electrode 101 is directly related to the vertical velocity of the sensing electrode 101 . Therefore, the present invention proposes a method for measuring the force of a conductor pressing a capacitive sensor, which uses the time change of the equivalent capacitance Cx on the sensing electrode 101 to judge the time from when the conductor touches the sensing electrode 101 to when the conductor leaves the sensing electrode 101, to judge The force with which a conducto...

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Abstract

The invention relates to a method for measuring the pressing force of a conductor onto a capacitive sensor. The method comprises the following steps: sampling a capacitance value of an induction electrode in each scheduled time; providing a critical value; and determining the force on the capacitive sensor by the conductor according to a specified period, wherein, the period from the time when the capacitance value reaches the threshold value to the time when the capacitance value reaches the peak value is a specified period.

Description

technical field [0001] The present invention relates to a technology related to a touch sensor, and in particular to a method for measuring the force of a conductor pressing a capacitive sensor. Background technique [0002] In recent years, due to the advancement of technology, many control buttons, such as elevator buttons or buttons of electronic amusement equipment, have also changed from the previous spring mechanical buttons to touch sensors. figure 1 is a circuit diagram of a prior art capacitive sensor. Please refer to figure 1 , the circuit includes a sensing electrode 101 , a resistor 102 and a sensing-control terminal 103 . The sensing electrode 101 is equivalent to a grounded capacitor in this circuit. [0003] figure 2 is the operation waveform of the capacitive sensor in the prior art at the coupling node A between the sensing electrode 101 and the resistor 102 . Please also refer to figure 1 and figure 2 , the sense-control terminal 103 initially char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14H03K17/96
Inventor 廖栋才罗立声
Owner GENERALPLUS TECH INC