Pressure sensing element

Abstract

A pressure-sensing cell made up from conductive rubber is prepared in certain shapes for the working condition of measuring the pressure such as the cylindrical form, the columnar slot form, the double cylindrical form and composite cylindrical form, etc.. The power type conductive rubber such as carbon ink, silver powder or copper power is adopted in the invention. The invention provides the following advantages: (1) The pressure-sensing cell with various forms can be made providing the features of simple technique, small size, low cost and simple subsequent circuit. The cells can be used insingle or in combination in order to suit the different situations with high sensitivity. The protection layer composed of the emulsion or other elastic material possessing the properties of insulation and waterproof covers the outer surfaces.

Description

technical field [0001] The invention belongs to the category of electronic components, in particular to pressure measuring components. Background technique [0002] At present, known pressure sensitive elements are widely used in various measurement and control systems and daily life, especially in electronic scales and electronic human body scales that are common in daily life. At present, the pressure sensitive elements commonly used in electronic scales are mostly semiconductor pressure sensitive elements, crystal pressure sensitive elements and capacitive pressure sensitive elements. Chinese Patent Application No. 99249331.5 discloses a quartz resonant load cell, Chinese patent application No. 96109252.1 discloses a capacitive pressure sensitive element, and Chinese Patent Application No. 96190266.3 discloses a semiconductor pressure sensitive element. All pressure sensitive components have disadvantages such as complex structure, large volu...

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