Variable dielectric capacitor type sensing device and method for oscillation measurement of piano key rolling reduction

A technology of sensing devices and capacitive sensors, which is applied in the direction of measuring devices, electrical devices, and measuring forces, can solve problems such as limited life, low precision, and complex measurement structures, and achieve the effect of simplifying the structure and ensuring simplicity

Inactive Publication Date: 2010-09-15
OCEAN UNIV OF CHINA
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Problems solved by technology

Use this non-contact, real-time sensing device and method to solve the problems of complex structure, low precision, high cost, limited life, and susceptibility to interference in the measurement of key depression

Method used

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  • Variable dielectric capacitor type sensing device and method for oscillation measurement of piano key rolling reduction
  • Variable dielectric capacitor type sensing device and method for oscillation measurement of piano key rolling reduction
  • Variable dielectric capacitor type sensing device and method for oscillation measurement of piano key rolling reduction

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Embodiment Construction

[0046] The technical details of the present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments as follows.

[0047] figure 1 It is a structural block diagram of the variable dielectric capacitive piano key depression measurement sensor device. The sensing device shown includes: a capacitive sensor (1) whose equivalent dielectric coefficient changes with the amount of key depression, and converts the capacitance change of the capacitive sensor (1) into a rectangular wave periodic change or a charging rise of the capacitive sensor (1) A physical conversion circuit (2) for changing the time (4-3), and a digital depression detection circuit (3) for detecting the change of the rectangular wave pulse width. The sensing method shown is: the capacitive sensor (1) produces capacitance change with the key (4) being depressed to reflect the key (4) depression amount, and the capacitance change of the capacitive sensor (1)...

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Abstract

The invention relates to variable dielectric capacitor type sensing device and method for oscillation measurement of piano key rolling reduction, wherein the sensing device comprises a capacitor sensor (1), a physical converting circuit (2) and a number rolling reduction detecting circuit (3). The sensing method comprises the following steps of: reflecting the piano key rolling reduction through the capacitance change of the capacitor sensor (1), which is generated along with the downward press of piano keys, converting the capacitance change of the capacitor sensor (1) into rectangular wave periodic change or the charging rise-time (4-3) change of the capacitor sensor (1) by the physical converting circuit (2), and detecting the rectangular wave impulse width change output by the physical converting circuit (2) through the number rolling reduction detecting circuit (3) to realize the measurement of the piano key rolling reduction. The invention provides a noncontact digital mode for collecting the electronic organ keyboard strength in real time, and the sensing device has simple structure, low cost, high precision and capability of simulating the key stroking strength and chord kneading and supplies an effective support for a high-performance electronic organ design.

Description

technical field [0001] The present invention relates to a non-contact real-time collection device and method for the keyboard force of a digital electronic keyboard, and more specifically provides a variable dielectric capacitive key depression vibration measurement sensor device and method. Background technique [0002] The sounding principle of electronic musical instruments is different from ordinary musical instruments. It uses the electrical signal generated by the electroacoustic synthesis circuit as the sounding source, and the sounding process is controlled by many parameters. For the electronic piano, a special keyboard acquisition circuit is required to collect keyboard performance information to control the sounding process of the electroacoustic synthesizer. Therefore, the real-time and delicate key force measurement can effectively improve the rich and detailed expressiveness of electronic musical instruments. [0003] With the development of electronic technol...

Claims

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Application Information

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IPC IPC(8): G01B7/02G01L1/14
Inventor 王建国杨睿刘兰军黎明迟书凯牛炯李坤王剑
Owner OCEAN UNIV OF CHINA
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