CN115824487B - Underwater pressure change detection device - Google Patents
Underwater pressure change detection device Download PDFInfo
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- CN115824487B CN115824487B CN202210459953.9A CN202210459953A CN115824487B CN 115824487 B CN115824487 B CN 115824487B CN 202210459953 A CN202210459953 A CN 202210459953A CN 115824487 B CN115824487 B CN 115824487B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The application is applicable to the technical field of deep sea water pressure detection equipment, and particularly relates to an underwater pressure change detection device, which comprises a first pressure bin, a second pressure bin, a differential pressure gauge and a watertight connector; the first pressure bin is provided with a first chamber, a flexible diaphragm is arranged between the first chamber and the outside; the second pressure bin is provided with a second cavity, the first cavity and the second cavity are internally filled with pressure-bearing liquid, a flow guide pipe is communicated between the first cavity and the second cavity, and the pressure of the first cavity and the pressure of the second cavity are the same for 0.5 seconds to 500 seconds through the flow of the liquid in the flow guide pipe; the differential pressure gauge is arranged between the first chamber and the second chamber; the watertight connector is used for being electrically connected with the differential pressure gauge, and the watertight connector is also electrically connected with the data acquisition and storage device. The technical problem that the detection and the recording of the low-frequency pressure change are difficult to realize with high precision in the prior art is solved.
Description
Technical Field
The application relates to the technical field of deep sea water pressure detection equipment, in particular to an underwater pressure change detection device.
Background
The change of the environmental pressure recorded in the air is relatively easy to realize, but the high-precision pressure change can be realized by using a pressure gauge or a differential pressure gauge, but the acquisition of the high-precision pressure change is relatively difficult in a deep sea environment, the severe environments such as seawater ultrahigh pressure, seawater corrosion and the like need to be faced, and the detection and recording of the low-frequency pressure change with high precision are difficult to realize, wherein the low-frequency pressure change refers to the condition that the pressure change at the deep sea is very slow.
Disclosure of Invention
The utility model aims at providing an underwater pressure change detection device, solves the technical problem that the high accuracy is difficult to realize detecting and recording the low-frequency pressure change in the prior art.
In order to achieve the above purpose, the technical scheme adopted in the application is as follows: there is provided an underwater pressure change detection apparatus including:
the first pressure bin is provided with a closed first chamber, and is provided with a flexible diaphragm, and the flexible diaphragm is arranged between the first chamber and the outside;
the second pressure bin is provided with a closed second chamber, the first chamber and the second chamber are internally filled with pressure-bearing liquid, a flow guide pipe is communicated between the first chamber and the second chamber, and the pressure of the first chamber and the pressure of the second chamber are the same for 0.5 seconds to 500 seconds through the flow of the liquid in the flow guide pipe;
the differential pressure gauge is arranged between the first chamber and the second chamber and is used for acquiring and outputting the pressure difference of the first chamber and the second chamber; and
the watertight connector is used for being electrically connected with the differential pressure gauge and is also electrically connected with the data acquisition and storage device.
In one embodiment, a first pressure reducing valve with a first chamber communicated with a second chamber in one way is further arranged between the first chamber and the second chamber, and a second pressure reducing valve with a second chamber communicated with the first chamber in one way is further arranged between the first chamber and the second chamber.
In one embodiment, the inner diameter of the guide tube is 0-1mm.
In one embodiment, the flexible membrane is made of rubber.
In one embodiment, at least one wall of the second pressure chamber is made of transparent material.
In one embodiment, the wall of the second pressure bin opposite to the differential pressure gauge is a cover body made of transparent materials, the cover body is provided with a liquid injection hole, and the liquid injection hole is detachably inserted with a screw for sealing.
In one embodiment, the watertight connector is arranged on the outer side of the cover body, the watertight connector is arranged on the mounting hole of the cover body and seals the mounting hole, and the watertight connector is connected with the differential pressure gauge through a signal wire.
In one embodiment, the first pressure bin comprises a bin cover and a bin body, wherein the bin cover is provided with a through hole, the bin cover is covered on the bin body, and the flexible diaphragm is arranged between the bin cover and the bin body.
In one embodiment, the first pressure bin and the second pressure bin are of a detachable integrated structure, and the first pressure bin and the second pressure bin are connected through bolts.
In one embodiment, the liquid is silicone oil.
The utility model provides a pressure change detection device under water has first pressure storehouse and second pressure storehouse, wherein first pressure storehouse can survey external environment's water pressure, keep unanimous with external environment's water pressure, and the second pressure storehouse is the reference pressure storehouse, both are the filling liquid, be equipped with differential manometer between the two, differential manometer communicates the cavity of two pressure warehouses simultaneously, can obtain the pressure differential between two warehouses, and pass through watertight connector with the signal and transmit data acquisition storage device, accomplish the detection to external environment water pressure change, and can realize detecting and recording low frequency pressure change, because the liquid flow in the honeycomb duct is very slow, specifically 0.5-500 seconds, when the water pressure in first pressure storehouse takes place slowly change, the second pressure storehouse can not very fast be the same with the water pressure in the first pressure storehouse, have a transition time, make differential manometer can survey the change of low frequency water pressure, can realize very slow change to the water pressure, and carry out signal conversion and transmission record.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic side view of an underwater pressure change detecting device according to an embodiment of the present application;
fig. 2 is a cross-sectional view taken along the direction A-A in fig. 1.
In the figure, 1, a first pressure bin; 2. a bin body; 3. a bin cover; 4. a first chamber; 5. a second pressure bin; 6. a second chamber; 7. a differential pressure gauge; 8. a first pressure reducing valve; 9. a second pressure reducing valve; 10. a watertight connector; 11. a flexible membrane; 12. a through hole; 13. a screw; 14. and a cover body.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.
In the description of the present application, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Referring to fig. 1 and 2, the present application provides an embodiment of an underwater pressure change detection apparatus, specifically including: the pressure measuring device comprises a first pressure bin 1, a second pressure bin 5, a differential pressure gauge 7 and a watertight connector 10, wherein the second pressure bin 5 is connected with the first pressure bin 1 to form an integrated structure;
wherein the first pressure chamber 1 is provided with a closed first chamber 4, the first pressure chamber 1 is provided with a flexible diaphragm 11, and the flexible diaphragm 11 is arranged between the first chamber 4 and the outside; the first pressure bin 1 has the function of keeping the pressure consistent with the external water pressure environment;
the second pressure bin 5 is provided with a closed second chamber 6, the first chamber 4 and the second chamber 6 are internally filled with pressure-bearing liquid, a flow guide pipe is communicated between the first chamber 4 and the second chamber 6, and the pressure of the first chamber 4 and the pressure of the second chamber 6 are the same for 0.5 seconds to 500 seconds through the flow of the liquid in the flow guide pipe; the second pressure chamber 5 is a reference pressure chamber.
Wherein, the differential pressure gauge 7 is arranged between the first chamber 4 and the second chamber 6, and is used for acquiring and outputting the pressure difference between the first chamber 4 and the second chamber 6; the watertight connector 10 is used for electrically connecting the differential pressure gauge 7, and the watertight connector 10 is also electrically connected with a data acquisition and storage device.
Specifically, the underwater pressure change detecting device provided by the embodiment comprises two pressure bins, wherein a first pressure bin 1 is provided with a first chamber 4, a second pressure bin 5 is provided with a second chamber 6, the first chamber 4 and the second chamber 6 are both used for containing pressure-bearing liquid, the first pressure bin 1 is provided with a flexible diaphragm 11, one side of the flexible diaphragm 11 is communicated with the outside, the other side of the flexible diaphragm 11 is provided with the first chamber 4, and thus, the water pressure of the outside environment can be kept consistent with the pressure in the first chamber 4 through the flexible diaphragm 11.
The second pressure chamber 5 is provided with a second chamber 6, the inside of the second chamber 6 is also used for containing liquid, the second pressure chamber 5 is a reference pressure chamber, namely, the second pressure chamber 5 has an initial pressure when being filled with liquid, the pressure in the first pressure chamber 1 is also the initial pressure when the device is placed in deep sea, the pressure in the first pressure chamber 1 is consistent with the pressure in the external deep sea, the pressure in the second pressure chamber 5 is gradually the same as the pressure in the first pressure chamber 1 through the liquid flow in the guide pipe, the pressure of the first chamber 4, the second chamber 6 and the external is the same, and then the pressure change condition at the deep sea is detected.
When the external seawater pressure rises, the pressure in the first chamber 4 rises along with the rising, at this time, the flow guide pipe adopted by the device can not instantly raise the pressure of the second chamber 6 to the level of the first chamber 4, the flow guide pipe has a transitional time difference, during the period, the differential pressure gauge 7 can obtain the pressure difference between the two chambers, and the signals are stored in the data acquisition and storage device through the watertight connector 10, the pressure change at the deep sea is recorded, the transitional time is 0.5 seconds to 500 seconds, and the lower-frequency pressure change can be detected and converted into a voltage signal due to delay, and the voltage signal is transmitted to the data acquisition and storage device.
After the transition time, the pressure in the second chamber 6 is again the same as the pressure in the first chamber 4 and the outside, so that after the outside pressure changes again, the pressure change is measured again by repeating the above operation, and thus the continuous detection and recording of the pressure change in the deep sea is realized.
The differential pressure gauge 7 is used as a pressure sensitive element and is used for recording pressure change, the working principle is that a miniature pressure strain gauge is adopted inside, the pressure change is converted into strain gauge resistance change, and the resistance change is converted into voltage value change through a Wheatstone bridge, so that the pressure change is converted into output voltage change, and the acquisition and recording of an acquisition system are facilitated.
The pressure value before the pressure change needs to be referenced to record the pressure change value, so that two closed pressure bins are designed in the device, the pressure in one pressure bin (reference pressure bin) is used as reference pressure, the other pressure bin (external pressure bin) is communicated with the outside, the pressure value is consistent with the pressure required to be measured by the outside, two ends of a differential pressure gauge 7 are respectively communicated with the two closed pressure bins, and the pressure outside and the reference pressure are respectively sensed, so that the output of pressure change is realized.
The underwater pressure change detection device has the beneficial effects that the underwater pressure change detection device is provided with the first pressure bin 1 and the second pressure bin 5, wherein the first pressure bin 1 can detect the water pressure of the external environment and keeps consistent with the water pressure of the external environment, the second pressure bin 5 is a reference pressure bin, liquid is filled in the reference pressure bin and the reference pressure bin, the differential pressure gauge 7 is arranged between the first pressure bin and the second pressure bin, the differential pressure gauge 7 is communicated with the chambers of the two pressure bins at the same time, the pressure difference between the two bins can be obtained, signals are transmitted to the data acquisition storage equipment through the watertight connector 10, the detection of the water pressure change of the external environment is completed, the detection and recording of the low-frequency pressure change can be realized, because the liquid in the flow of the flow guide tube is very slow, particularly 0.5-500 seconds, when the water pressure of the first pressure bin 1 slowly changes, the second pressure bin 5 is not very fast the same as the water pressure in the first pressure bin 1, the differential pressure gauge 7 can detect the change of the water pressure, the very slow change of the water pressure can be realized, the detection of the water pressure can be realized, the signal conversion and the signal transmission and recording can be realized.
As shown in fig. 1 and 2, as a preferred embodiment of the underwater pressure change detecting device provided in the present embodiment, since there may be a situation in which the pressure difference between the first chamber 4 and the second chamber 6 is large, in order to avoid damage to the differential pressure gauge 7, the present embodiment further provides a first pressure reducing valve 8 in which the first chamber 4 is in one-way communication with the second chamber 6 is further provided between the first chamber 4 and the second chamber 6, and a second pressure reducing valve 9 in which the second chamber 6 is in one-way communication with the first chamber 4 is further provided between the first chamber 4 and the second chamber 6.
Specifically, the first pressure reducing valve 8 and the second pressure reducing valve 9 are both one-way valves, and the first pressure reducing valve 8 can be opened when the pressure in the first chamber 4 is greater than the pressure in the second chamber 6 and the pressure difference reaches a certain value, so that the liquid in the first chamber 4 enters the second chamber 6 through the first pressure reducing valve 8, damage to the differential pressure gauge 7 caused by excessive pressure difference can be avoided, and likewise, the second pressure reducing valve 9 can be opened when the pressure in the second chamber 6 is greater than the pressure in the first chamber 4 and the pressure difference reaches a certain value, so that the liquid in the second chamber 6 enters the first chamber 4 through the second pressure reducing valve 9, and damage to the differential pressure gauge 7 caused by excessive pressure difference can be avoided.
Because an external high-pressure environment is needed, when the external pressure is changed severely, huge pressure difference between the first pressure bin 1 and the second pressure bin 5 is easily caused, and the differential pressure gauge 7 is easily damaged, so that two one-way pressure reducing valves are arranged between the first pressure bin 1 and the second pressure bin 5 in a designed way, the two one-way pressure reducing valves are arranged in opposite directions, when the working pressure range of the differential pressure gauge 7 is exceeded, the pressure of the first pressure bin 1 is lower than the pressure of the second pressure bin 5 (the pressure difference exceeds the allowable range), and the second pressure reducing valve 9 is opened to release the pressure; the pressure of the first pressure bin 1 is higher than that of the second pressure bin 5 (the pressure difference exceeds the allowable range), the first pressure reducing valve 8 is opened, and the pressure is released; thereby protecting the differential pressure gauge 7 and the strength of the whole structure.
The specific implementation manner of the first pressure reducing valve 8 and the second pressure reducing valve 9 provided by the embodiment realizes the overpressure protection of the differential pressure gauge 7, prevents the differential pressure gauge 7 from being damaged due to the fact that the larger pressure difference occurs between the external pressure bin and the reference pressure bin, and therefore, the device can bear higher external water pressure without damaging the differential pressure gauge 7, and ensures the normal operation of the differential pressure gauge 7 in a deep sea or high pressure environment.
Further, since the time required for the flow guide tube to perform the liquid flow to equalize the pressures at both ends is 0.5 seconds to 500 seconds, the corresponding present example provides a preferable inner diameter size of the flow guide tube, and the present embodiment provides an inner diameter of the flow guide tube of 0 to 1mm for the first pressure chamber 1 and the second pressure chamber 5 of the conventional volume. At this time, the flow guide pipe is a capillary pipe, so that the transition time can be increased, and the detection and recording of the low-frequency water pressure change can be ensured. Because of the small diameter of the capillary, the fluid flow through the capillary is small, so that the second pressure chamber 5 has a certain delay relative to the pressure of the first pressure chamber 1, and can convert the pressure change signal with lower frequency into a voltage signal.
Specifically, the diameter of the flow guide pipe is between 0 mm and 1mm, so that when the first pressure bin 1 (equivalent to the external pressure of the device) is changed, a tiny flow of liquid flows through the capillary (the flow is steady in the circular pipe by using poiseuille law, the Reynolds number is not large, when the flowing mode is laminar, the relationship between the flow Q and the pressure difference delta P at two ends of the AB pressure bin, the capillary radius r0, the length L of the pipeline and the viscosity coefficient eta of the fluid can be designed, and the proper capillary diameter can be designed), so that the pressure of the second pressure bin 5 tends to the pressure value of the first pressure bin 1, and the delay effect is favorable for the device to record (convert) a lower-frequency pressure change signal.
As shown in fig. 1 and 2, as a preferred embodiment of the underwater pressure change detecting device provided in this embodiment, the flexible diaphragm 11 is made of rubber.
The rubber has stronger toughness and better softness, and strong extrusion resistance, and external water pressure can be transmitted to the first chamber 4 through the flexible diaphragm 11, so that the pressure in the first chamber 4 is consistent with the external environment. In order to realize deep sea sealing and pressure resistance, the first pressure bin 1 is isolated from external water pressure through a rubber diaphragm, and the pressure of the first pressure bin 1 can be kept consistent with external water pressure due to the flexibility of the rubber diaphragm, so that the pressure bin change of the first pressure bin 1 is equal to the change of external pressure.
In order to observe the condition inside the second pressure chamber 5, the present embodiment uses a transparent material for at least one chamber wall of the second pressure chamber 5, and can focus on the condition inside the second pressure chamber 5.
As shown in fig. 2, as a preferred embodiment of the underwater pressure change detecting device provided in this embodiment, a cover 14 made of transparent material is provided on a wall of the second pressure chamber 5 opposite to the differential pressure gauge 7, and a liquid injection hole is provided on the cover 14, and a screw 13 for sealing is detachably inserted into the liquid injection hole.
Specifically, the screw 13 is opened to fill the liquid into the liquid filling hole, so that the liquid fills the second chamber 6 and the first chamber 4, and then the liquid filling hole is blocked, and the cover 14 is made of a transparent material, so that the internal liquid filling condition can be observed through the cover 14.
As shown in fig. 2, further, a watertight connector 10 is arranged outside the cover 14, the watertight connector 10 is mounted on a mounting hole of the cover 14 and seals the mounting hole, and the watertight connector 10 is connected with the differential pressure gauge 7 through a signal line. The signal line passes through the second chamber 6 to the differential pressure gauge 7, and is electrically connected to the differential pressure gauge 7. The watertight connector 10 is also connected with an external data acquisition and storage device, and can record and store the change of the pressure signal.
As shown in fig. 2, as a preferred implementation manner of the underwater pressure change detecting device provided in this embodiment, the first pressure chamber 1 includes a chamber cover 3 and a chamber body 2, a through hole 12 is provided on the chamber cover 3, the chamber cover 3 is covered on the chamber body 2, and the flexible diaphragm 11 is provided between the chamber cover 3 and the chamber body 2.
Specifically, the first pressure bin 1 is of a closed structure, the first pressure bin is provided with a bin cover 3, the bin cover 3 and the bin body 2 are detachably connected, specifically, the first pressure bin can be in bolted connection, a through hole 12 is formed in the bin cover 3, the flexible diaphragm 11 is pressed between the bin cover 3 and the bin body 2, so that one side of the flexible diaphragm 11 is provided with a first cavity 4, and the other side of the flexible diaphragm is provided with the through hole 12, and pressure transmission can be performed.
Further, the specific arrangement form between the first pressure bin 1 and the second pressure bin 5 may be that the first pressure bin 1 and the second pressure bin 5 are of a detachable integrated structure, and the first pressure bin 1 and the second pressure bin 5 are connected through bolts.
Specifically, the first pressure chamber 1 and the second pressure chamber 5 may be detachably connected through a respective chamber wall, and may be connected by bolts, while the differential pressure gauge 7, the first pressure reducing valve 8 and the second pressure reducing valve 9 are respectively disposed on the chamber walls, and two ends of the differential pressure gauge are respectively communicated with the first chamber 4 and the second chamber 6. The draft tube is also arranged on the bin wall and is communicated with the first chamber 4 and the second chamber 6.
The first pressure chamber 1 and the second pressure chamber 5 may share a chamber wall, and the chamber wall may be a chamber wall of the first pressure chamber 1 or a chamber wall of the second pressure chamber 5, and the first pressure chamber 1 and the second pressure chamber 5 are connected to form the device, where the flow guide pipe is disposed on the shared chamber wall.
Further, the liquid filling the first chamber 4 and the second chamber 6 may be silicone oil.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (9)
1. Underwater pressure change detection device, characterized by comprising:
the first pressure bin is provided with a closed first chamber, and is provided with a flexible diaphragm, and the flexible diaphragm is arranged between the first chamber and the outside;
the second pressure bin is provided with a closed second chamber, the first chamber and the second chamber are internally filled with pressure-bearing liquid, a flow guide pipe is communicated between the first chamber and the second chamber, and the pressure of the first chamber and the pressure of the second chamber are the same for 0.5 seconds to 500 seconds through the flow of the liquid in the flow guide pipe;
the differential pressure gauge is arranged between the first chamber and the second chamber and is used for acquiring and outputting the pressure difference of the first chamber and the second chamber; and
the watertight connector is used for being electrically connected with the differential pressure gauge, the watertight connector is further electrically connected with the data acquisition and storage device, a first pressure reducing valve for enabling the first cavity to be in one-way communication with the second cavity is further arranged between the first cavity and the second cavity, and a second pressure reducing valve for enabling the second cavity to be in one-way communication with the first cavity is further arranged between the first cavity and the second cavity.
2. The underwater pressure variation detecting device as claimed in claim 1, wherein the inner diameter of the guide tube is 0-1mm.
3. The underwater pressure variation detecting device as claimed in claim 1, wherein the flexible diaphragm is made of rubber.
4. The underwater pressure variation detection device as in claim 1 wherein at least one of the walls of the second pressure chamber is a transparent material.
5. The underwater pressure change detection device as claimed in claim 4, wherein a wall of the second pressure chamber opposite to the differential pressure gauge is a transparent cover body, a liquid injection hole is formed in the cover body, and a screw for sealing is detachably inserted into the liquid injection hole.
6. The underwater pressure variation detecting device as claimed in claim 5, wherein the watertight connector is provided outside the cover body, the watertight connector is mounted on the mounting hole of the cover body and seals the mounting hole, and the watertight connector is connected to the differential pressure gauge through a signal line.
7. The underwater pressure variation detecting device as claimed in claim 1, wherein the first pressure chamber includes a chamber cover and a chamber body, the chamber cover is provided with a through hole, the chamber cover is covered on the chamber body, and the flexible diaphragm is provided between the chamber cover and the chamber body.
8. The underwater pressure variation detecting device as claimed in claim 1, wherein the first pressure chamber and the second pressure chamber are of a detachable integrated structure, and the first pressure chamber and the second pressure chamber are connected by bolts.
9. The underwater pressure variation detection device as in claim 1 wherein the liquid is silicone oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210459953.9A CN115824487B (en) | 2022-04-28 | 2022-04-28 | Underwater pressure change detection device |
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| CN202210459953.9A CN115824487B (en) | 2022-04-28 | 2022-04-28 | Underwater pressure change detection device |
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| CN115824487A CN115824487A (en) | 2023-03-21 |
| CN115824487B true CN115824487B (en) | 2023-07-14 |
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| CN116858421B (en) * | 2023-09-01 | 2023-11-24 | 深圳市鑫精诚传感技术有限公司 | Low-frequency pressure measurement method and ocean low-frequency pressure measurement assembly |
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| US5029479A (en) * | 1988-08-15 | 1991-07-09 | Imo Industries, Inc. | Differential pressure transducers |
| JP2007155506A (en) * | 2005-12-05 | 2007-06-21 | Central Res Inst Of Electric Power Ind | Device and method for measuring tension in liquid |
| WO2009006944A1 (en) * | 2007-07-12 | 2009-01-15 | Abb Research Ltd | Pressure sensor |
| CN209387187U (en) * | 2019-03-26 | 2019-09-13 | 李文博 | A kind of safety-type pressure-measuring device |
| CN110579308A (en) * | 2019-10-11 | 2019-12-17 | 中国海洋大学 | Device and method for observing pressure of submarine sediments |
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2022
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| US5029479A (en) * | 1988-08-15 | 1991-07-09 | Imo Industries, Inc. | Differential pressure transducers |
| JP2007155506A (en) * | 2005-12-05 | 2007-06-21 | Central Res Inst Of Electric Power Ind | Device and method for measuring tension in liquid |
| WO2009006944A1 (en) * | 2007-07-12 | 2009-01-15 | Abb Research Ltd | Pressure sensor |
| CN209387187U (en) * | 2019-03-26 | 2019-09-13 | 李文博 | A kind of safety-type pressure-measuring device |
| CN110579308A (en) * | 2019-10-11 | 2019-12-17 | 中国海洋大学 | Device and method for observing pressure of submarine sediments |
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