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Measuring method and its device for deep water pressure

A measurement method and deep-water technology, which are applied to measurement devices, simultaneous measurement of multiple hydraulic valves, and measurement of fluid pressure, etc., can solve problems such as inaccurate static pressure values, large pressure sensor ranges, and unstable measurement environments, and improve accuracy. , The effect of accurate static pressure value

Inactive Publication Date: 2005-09-21
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: to overcome the defect that the existing pressure sensor device and measuring method can only measure the static and dynamic pressure and can not directly measure the dynamic pressure; The measured static pressure value is inaccurate, thereby providing a method and device for measuring deep water pressure

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  • Measuring method and its device for deep water pressure
  • Measuring method and its device for deep water pressure
  • Measuring method and its device for deep water pressure

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Experimental program
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Embodiment 1

[0015] Make a measuring device for deep water pressure of the present invention. like figure 1 As shown, the device comprises a gas-liquid cavity 4 and two pressure sensors mounted on the gas cavity wall of the gas-liquid cavity 4, wherein one pressure sensor is a dynamic pressure sensor 2, and the dynamic pressure sensor is provided with an air cavity Connected vent hole 5, its sensitive part is located at the measured deep water outside the gas-liquid cavity 4, and the other pressure sensor is a static pressure sensor 1, which is installed on the wall of the gas cavity of the gas-liquid cavity 4, and its sensitive part is located in the gas cavity Inside; a liquid-permeable permeable plate 3 is installed at the bottom of the gas-liquid cavity 4 .

[0016] In this embodiment, two commercially available mechanical strain gauge pressure sensors AK-1c are used. The dynamic pressure sensor 2 adopts a sensor with a range of 0.1MPa, and the static pressure sensor 1 adopts a sensor...

Embodiment 2

[0018] The measurement device 10 of Embodiment 1 of the present invention is used for dynamic and static pressure measurement. like figure 2 As shown, the above figure 1 Put the measuring device 10 shown in a sealed container 6, first open the vent hole 7, fill it with water, close the solenoid valve 9 and seal the vent hole 7; then open the solenoid valve 9 to release water, when the pressure gauge 8 shows that the pressure reaches 0.25 MPa closes the solenoid valve 9.

[0019] The permeable hole balances the pressure of the gas in the gas-liquid cavity with the static pressure value of the measured position for a period of time; the outer side of the dynamic pressure sensor 2 feels the pressure of the liquid at the measured position, and the other side feels the pressure of the gas in the gas-liquid cavity 4 , the static pressure part achieves self-adaptation, so that the dynamic pressure sensor 2 only feels the dynamic pressure part, and the range setting only needs to m...

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Abstract

The present invention relates to deep water pressure measuring method and device. The measurement method features that the deep water pressure is measured by setting one gas-liquid cavity with a penetration board of (0.1-0.5)E6 / sq cm penetration rate mounted in the bottom and one pressure sensor mounted on the gas cavity wall of the gas-liquid cavity to the deep water to be measured. The pressure sensor includes dynamic pressure sensor and static pressure sensor, the dynamic pressure sensor has hole communicated with the gas cavity and sensing part outside the gas-liquid cavity and the static pressure sensor is mounted onto the wall of gas cavity in the gas-liquid cavity and has sensing part inside the gas cavity. The present invention realizes the separated measurement of dynamic pressure and static pressure in greatly raised measurement precision.

Description

technical field [0001] The invention relates to a method and device for measuring deep water pressure. Background technique [0002] At present, there are mainly two methods of measuring deep water pressure widely used: one is to use a ventilated cable to connect the pressure sensor to the atmosphere, and measure the differential pressure between the measured position and the atmospheric pressure; Package a standard atmospheric pressure, and measure the differential pressure value between the measured position and the package atmospheric pressure. These two methods can get relatively ideal results when measuring in shallow water areas, but there are many shortcomings in measuring deep water pressure, and the actual required dynamic pressure on the surface of structures at deep water levels cannot be measured, because due to the relatively large impact of static pressure, the range Relatively, it needs to be particularly large, for example: to measure the pressure of 100 met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L15/00
Inventor 徐永君陈力刘玉标王晓玲
Owner INST OF MECHANICS CHINESE ACAD OF SCI