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Pressure measuring device

  • US 10,330,547 B2
  • Filed: 03/19/2013
  • Issued: 06/25/2019
  • Est. Priority Date: 04/24/2012
  • Status: Active Grant
First Claim
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1. A pressure measuring device, comprising:

  • an essentially cylindrical pressure measuring cell, which has at least one circular disk shaped measuring membrane, at least one platform;

    a pressure duct;

    a first pressure chamber formed between said measuring membrane and said platform, which is contactable with a pressure via said pressure duct, which extends through said platform;

    a second pressure chamber;

    said pressure measuring cell has an electrical transducer for transducing a pressure dependent deflection of said measuring membrane into at least one pressure dependent, electrical, primary signal;

    a first electronic circuit;

    a second electronic circuit; and

    an essentially cylindrical housing, said housing having in its interior a measuring cell chamber, and said housing having an outer diameter, wherein;

    said pressure measuring cell is arranged in said measuring cell chamber, said pressure measuring cell having an outer diameter;

    said housing has on an end face a pressure receipt opening,said pressure duct of said pressure measuring cell communicates with said pressure receipt opening and via said opening is loadable with a media pressure present at said pressure receipt opening, andsaid first electronic circuit for operating electrical transducer of said pressure measuring cell, and for processing the electrical, primary signal, and for outputting a measurement signal dependent on the primary signal, and said first electronic circuit is arranged in said housing and electrically connected with the transducer via at least one connecting line; and

    the cylinder axis of said pressure measuring cell forms with the cylinder axis of said housing a right angle;

    said outer diameter of said pressure measuring cell amounts to not less than 80% of said outer diameter of said housing in an axial section of said measuring cell chamber, where the measuring cell is located;

    said second pressure chamber is contactable with atmospheric pressure via a second pressure duct, which extends through a second platform;

    the pressure measuring device further comprises, a single isolating diaphragm, which is connected at the end of said housing along a peripheral edge pressure-tightly with said housing to form a pressure receiving chamber between said housing and said isolating diaphragm, wherein;

    said pressure receipt opening opens into said pressure receiving chamber, and a hydraulic path, which extends from said pressure receiving chamber through said pressure receipt opening and said pressure duct to said first pressure chamber of said pressure measuring cell, in order to transfer the pressure present on said isolating diaphragm into said first pressure chamber;

    the second electronic circuit, is connected to said first electronic circuit, in order to receive and to process the measurement signal, and which is arranged in said housing at the side of said measuring cell facing away from said pressure receipt opening;

    said second electronic circuit issues at a signal output an output signal dependent on the measurement signal, and the signal output is connected to a signal path, wherein said housing has a signal path opening, through which the signal path extends; and

    the signal path opening is arranged at the end of said housing facing away from said pressure receipt opening.

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