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Pressure change measurement device, altitude measurement device, and pressure change measurement method

A technique for measuring device, pressure, applied in the direction of measuring device, height/level measurement, pressure difference measurement between multiple valves, etc.

Active Publication Date: 2017-08-18
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Here, the above-mentioned pressure passage hole has a very small structure, which restricts the flow of the pressure transmission medium in the inner chamber. Furthermore, the pressure of the inner chamber changes according to the inflow and outflow of the pressure transmission medium. The change in pressure is delayed to follow the change in pressure of the measurement object

Method used

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  • Pressure change measurement device, altitude measurement device, and pressure change measurement method
  • Pressure change measurement device, altitude measurement device, and pressure change measurement method
  • Pressure change measurement device, altitude measurement device, and pressure change measurement method

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no. 1 approach

[0056] (1-1: overall structure)

[0057] figure 1 The structure of the pressure change measurement device 1 according to the first embodiment of the present invention is shown.

[0058] The pressure change measuring device 1 of the first embodiment has: a differential pressure sensor 90; a signal generation reference value signal; and an arithmetic processing unit 30 that calculates a change in the measurement target pressure based on the output signal of the differential pressure sensor 90 and the reference value signal set by the reference value setting unit 60 .

[0059] The detailed structure of the differential pressure sensor 90 will be described later, and it has a chamber 10, a gap 13 that is a communication hole through which the pressure transmission medium that transmits the pressure of the measurement object flows inside and outside the chamber 10, and the internal pressure of the measurement chamber 10 and the pressure of the measurement object. The cantilever 4...

no. 2 approach

[0145] use Figure 11 The pressure change measuring device 1 of the second embodiment will be described. In addition, for the same structures as those of the pressure change measuring device of the first embodiment, the same names and symbols are used, and descriptions thereof are omitted.

[0146] (2-1: Overall structure)

[0147] Here, in the pressure change measurement device 1 of the second embodiment, the difference from the pressure change measurement device 1 of the first embodiment is that the reference value setting unit 60 constituting the pressure change measurement device 1 is composed of a determination unit 61, The detection unit 62 and a storage device (not shown) are configured.

[0148] The detection unit 62 is composed of a sensor and a detector that detect whether or not there is a change in the external pressure Pout. Furthermore, like the first embodiment, the determination unit 61 has a function of calculating and updating a reference value based on th...

no. 3 approach

[0169] use Figure 14 The pressure change measuring device 1 of the third embodiment will be described. In addition, for the same structure as the pressure change measurement device of the said 1st and 2nd embodiment, the same name and code|symbol are used, and the description is abbreviate|omitted.

[0170] (3-1: Overall structure)

[0171] Here, in the pressure change measurement device 1 of the third embodiment, the difference from the pressure change measurement devices 1 of the first and second embodiments is that the reference value setting unit 60 is composed of a determination unit 61 , a pressure adjustment unit 63 , Storage device (illustration omitted). Furthermore, a user interface (not shown) for receiving a reference value setting instruction from a user is connected to the determination unit 61 . and then, Figure 14 The shown pressure regulator 63 is a valve capable of opening and closing a vent hole provided between the chamber 10 and the outside in the di...

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Abstract

The present invention provides a pressure change measurement device and a pressure change measurement method that allow highly accurate detection of a change in pressure to be measured over time. Specifically, a reference value setting unit 60 provided to a pressure change measurement device 1 generates and outputs a reference value signal on the basis of an output signal of a differential pressure measuring cantilever 4 that is in a predetermined state. An arithmetic processing unit 30 calculates a change in pressure to be measured on the basis of the output signal, the reference value signal, the volume of a cavity 10, the amount of distribution of a pressure transmitting medium that is distributed inside and outside the cavity 10 per predetermined time unit, and the like.

Description

technical field [0001] The invention relates to a pressure change measuring device, a height measuring device and a pressure change measuring method. Background technique [0002] Conventionally, as a device for measuring a pressure change of a measurement object, there is known a pressure change measuring device (for example, Patent Documents 1 and 2), which has an inner chamber (pressure chamber) and measures the pressure of the inner chamber. A differential pressure gauge (diaphragm, etc.) that is a differential pressure from the pressure of the measurement object is a pressure passage hole that allows the pressure transmission medium of the measurement object to flow into and out of the inner chamber. [0003] Here, the above-mentioned pressure passage hole has a very small structure, which restricts the flow of the pressure transmission medium in the inner chamber. Furthermore, the pressure of the inner chamber changes according to the inflow and outflow of the pressure...

Claims

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Application Information

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IPC IPC(8): G01L7/00G01C5/06G01L13/02G01L13/06
CPCG01C5/06G01L9/0045G01L9/0054G01L19/0092G01L11/002G01L13/025G01L7/02G01F1/383G01F1/363G01F1/36G01F1/38G01L7/00G01L13/06G01L13/02G01F1/34
Inventor 篠原阳子须田正之大海学内山武海法克享野边彩子
Owner SEIKO INSTR INC
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