Miniature dynamic osmotic water pressure sensor

• Main Authors: TANG YUNHAI, PAN TAO, ZANG TAOCHENG, WANG BING, WANG WENXIANG, CHENG XINLI, SHEN JIAOYAN, QIN CHANGFA
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2014
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

The utility model discloses a miniature dynamic osmotic water pressure sensor which comprises a housing, a cup-shaped substrate, a stainless steel rear cover, a permeable stone layer and a signal modulation amplification module. The inner wall of the cup-shaped substrate is provided with a stepped surface, and the permeable stone layer is installed on the stepped surface of the cup-shaped substrate. The cup-shaped substrate is embedded into a front accommodating cavity and is installed on a stepped annular surface. The stainless steel rear cover is installed on the same end of the rear accommodating cavity of the housing. A silicon nitride film covers the inner surface of the cup-shaped substrate. The surface, facing opposite to the permeable stone layer, of the cup-shaped substrate is provided with a pressure sensitive assembly. A first lead wire is in cross connection between the pressure sensitive assembly and one end of the signal modulation amplification module. A signal cable is embedded into a through