CN1220039C - Measuring method and its device for deep water pressure - Google Patents
Measuring method and its device for deep water pressure Download PDFInfo
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- CN1220039C CN1220039C CN 02159057 CN02159057A CN1220039C CN 1220039 C CN1220039 C CN 1220039C CN 02159057 CN02159057 CN 02159057 CN 02159057 A CN02159057 A CN 02159057A CN 1220039 C CN1220039 C CN 1220039C
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- gas
- pressure sensor
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Abstract
The present invention relates to a measuring method and a device for deep water pressure. The measuring method is characterized in that a gas and liquid cavity of which the bottom is provided with a permeation plate with a permeation rate of 0.1*10<minus 6> minus 0.5*10<minus 6>cm<2>, and a pressure sensor arranged on the gas cavity wall of the gas and liquid cavity are placed at the deep water site of a water level to be measured so as to measure the water pressure of the deep water site; the pressure sensor comprises a dynamic pressure sensor and a static pressure sensor, wherein the dynamic pressure sensor is provided with a hole communicated with the gas cavity, and the sensitive part of the dynamic pressure sensor is positioned outside the gas and liquid cavity; the static pressure sensor is arranged on the gas cavity wall of the gas and liquid cavity, and the sensitive part of the static pressure sensor is positioned in the gas cavity. The method and the device thereof have the advantages that the dynamic pressure and static pressure are respectively measured, the measurement precision of the dynamic pressure is greatly enhanced, and a measured static pressure value is accurate.
Description
Technical field
The present invention relates to a kind of measuring method and device of deep-water pressure.
Background technology
The method of the measurement deep-water pressure that extensively adopts has mainly adopted two kinds at present: a kind of is to utilize the ventilation cable with pressure transducer and atmosphere conducting, records the differential pressure value between measured position and the atmospheric pressure; A kind of is encapsulation one standard atmospheric pressure in pressure transducer, records the differential pressure value between measured position and the encapsulation atmospheric pressure.These two kinds of methods can obtain more satisfactory result when measuring in the shoal water zone, but measure deep-water pressure and will have many deficiencies, what do not detect actual needs is in deep water water level works surface dynamic pressure, because because the static pressure influence is bigger, range relatively just needs big especially, for example: measure the pressure that static pressure is about 10 atmospheric 100 meters deep water, range is set to 10 more than the atmospheric pressure, the precision of pressure transducer is the 0.2-0.5% of whole range, be 0.02-0.05 atmospheric pressure, like this, the dynamic pressure value generally all is in the error range, even can not obtain desirable dynamic pressure by measurement result calculating, simultaneously can not fine reflection static pressure value.
Summary of the invention
The objective of the invention is: overcome existing pressure sensor apparatus and measuring method can only record quiet dynamic pressure and, can not directly measure the defective of dynamic pressure, and existing measuring method is because the range of pressure transducer is big and measurement environment is unstable, cause the static pressure value out of true that records, thereby a kind of measuring method and device thereof of deep-water pressure are provided.
The object of the present invention is achieved like this: the measuring method of deep-water pressure provided by the invention is characterized in that it is 0.1 * 10 that permeability is installed in a bottom
-6-0.5 * 10
-6Cm
2The gas-liquid cavity of infiltration plate and be loaded on the deep water place that pressure transducer on the air cavity wall of this gas-liquid cavity is put into water level to be measured is just measured the pressure at this deep water place.Described pressure transducer is the dynamic pressure sensor, and this dynamic pressure sensor has the hole that is communicated with air cavity, and it is outer to measure the dynamic pressure of this deep water that its responsive part is positioned at the gas-liquid cavity; Described pressure transducer is a static pressure sensor, is installed on the air cavity wall of gas-liquid cavity, and its sensitive part is positioned at air cavity to measure the static pressure of deep water; Described pressure transducer comprises dynamic pressure sensor and static pressure sensor, and described dynamic pressure sensor has the hole that is communicated with air cavity, and it is outer to measure the dynamic pressure of this deep water that its responsive part is positioned at the gas-liquid cavity; Described static pressure sensor is installed on the air cavity wall of gas-liquid cavity, and its sensitive part is positioned at air cavity to measure the static pressure of deep water.
A kind of measurement mechanism with the said method deep-water pressure as shown in Figure 1, is characterized in that, this device comprises that it is 0.1 * 10 that permeability is installed in a bottom
-6-0.5 * 10
-6Cm
2The gas-liquid cavity of infiltration plate and be loaded on pressure transducer on the air cavity wall of this gas-liquid cavity.Described pressure transducer is the dynamic pressure sensor, and this dynamic pressure sensor has the hole that is communicated with air cavity, and its responsive part is positioned at outside the gas-liquid cavity; Described pressure transducer is a static pressure sensor, is installed on the air cavity wall of gas-liquid cavity, and its sensitive part is positioned at air cavity; Described pressure transducer comprises dynamic pressure sensor and static pressure sensor, and described dynamic pressure sensor has the hole that is communicated with air cavity, and its responsive part is positioned at outside the gas-liquid cavity; Described static pressure sensor is installed on the air cavity wall of gas-liquid cavity, and its sensitive part is positioned at air cavity.
The invention has the advantages that: the present invention measures the measuring method of deep-water pressure and the measurement respectively that device has been realized dynamic pressure and static pressure thereof; The precision that makes dynamic pressure measure increases substantially, and the static pressure value that measures is accurate.
Description of drawings
Fig. 1 is the measurement mechanism synoptic diagram of deep-water pressure of the present invention
Fig. 2 is the test unit figure of the measuring method embodiment 2 of deep-water pressure of the present invention
Accompanying drawing indicates:
1, static pressure sensor 2, dynamic pressure sensor 3, permeable window
4, gas-liquid cavity 5, air hole 6, airtight container
7, vent hole 8, tensimeter 9, solenoid valve
10, measurement mechanism
Embodiment
Make the measurement mechanism of a deep-water pressure of the present invention.As shown in Figure 1, this device comprises a gas-liquid cavity 4 and is loaded on two pressure transducers on the air cavity wall of this gas-liquid cavity 4, wherein, a pressure transducer is a dynamic pressure sensor 2, this dynamic pressure sensor has the air hole 5 that is communicated with air cavity, and its responsive part is positioned at gas-liquid cavity 4 outer tested deep water places, and another pressure transducer is a static pressure sensor 1, be installed on the air cavity wall of gas-liquid cavity 4, its sensitive part is positioned at air cavity; The infiltration plate 3 of a liquid permeable is installed in gas-liquid cavity 4 bottoms.
Two commercially available mechanical strain formula pressure transducer AK-1c have been adopted in the present embodiment, it is the 0.1MPa sensor that dynamic pressure sensor 2 adopts range, it is 1MPa (the 100m depth of water) sensor that static pressure sensor 1 adopts range, makes a square shell with iron plate, and the volume in its gas-liquid chamber is 4 * 4 * 3cm
3, it is that φ=0.2, permeability are K=0.225 * 10 that infiltration plate 3 has adopted factor of porosity
6Cm
2, radius is the infiltration stone of d=1cm; As shown in Figure 1, the output of the cable seal of dynamic pressure sensor 2, air hole 5 is communicated with air cavity, and the diaphragm outside of dynamic pressure sensor 2 is placed in the water; Having encapsulated an atmospheric static pressure sensor 1 is placed in the air cavity.
Utilize the measurement mechanism 10 of the embodiment of the invention 1 to carry out dynamic and static pressure survey.As shown in Figure 2, above-mentioned measurement mechanism shown in Figure 1 10 is put into an airtight container 6, earlier vent hole 7 is opened, close solenoid valve 9 and seal vent hole 7 after piling water; Open solenoid valve 9 again and discharge water, when tensimeter 8 shows that pressure reaches 0.25MPa and closes solenoid valve 9.
Permeability hole make the pressure of gas in the gas-liquid cavity in a period of time with the static pressure value balance of measured position; The pressure of measured position liquid is experienced in the outside of dynamic pressure sensor 2, another side is experienced the pressure of gas in the gas-liquid cavity 4, static pressure partly reaches self-adaptation, thereby make 2 of dynamic pressure sensors experience the dynamic pressure part, the range setting need only be satisfied the smaller value range of dynamic pressure measurement requirement, and measuring accuracy is greatly improved; Static pressure sensor 1 directly records the pressure of gas in the gas-liquid cavity 4, in gas-liquid cavity 4, the dynamic pressure of extraneous fluctuation does not produce any influence to the static pressure in the gas-liquid cavity 4, making static pressure measure can carry out in the environment of a highly stable true static pressure of reflection, accurately measures the static pressure value.
The same day, tap water pressure was about 3 atmospheric pressure (atmospheric pressure is about 10 meters depth of waters), and external atmospheric pressure is 0.1086MPa during experiment, closed solenoid valve 9 samplings in back 5 minutes, and dynamic pressure is approximately 0, and static pressure is 0.1411MPa; Stop immediately after opening solenoid valve 9, tensimeter 8 shows that pressure are about 0.28MPa, measures sampled result preceding 5 seconds in this process, and is quiet, the dynamic pressure measurement result is as shown in table 1:
Table 1
| Sampling time (s) | Dynamic pressure (MPa) | Static pressure (MPa) |
| 0 | 0.00003 | 0.1411 |
| 0.3 | 0.01724 | 0.1411 |
| 0.7 | 0.02615 | 0.1411 |
| 0.9 | 0.02838 | 0.1411 |
| 1 | 0.02998 | 0.1411 |
| 2 | 0.02998 | 0.1412 |
| 3 | 0.02998 | 0.1412 |
| 4 | 0.02997 | 0.1413 |
| 5 | 0.02997 | 0.1413 |
As shown in Table 1, open solenoid valve after the water filling dynamic pressure rise to 0.02997MPa very soon, static pressure is also more stable, and is more identical with actual result, shown that the static pressure, the dynamic pressure that adopt this measuring method to measure deep water are rationally feasible.
Claims (2)
1, a kind of measuring method of deep-water pressure is characterized in that, it is 0.1 * 10 that permeability is installed in a bottom
-6-0.5 * 10
-6Cm
2The gas-liquid cavity of infiltration plate and be loaded on the deep water place that pressure transducer on the air cavity wall of this gas-liquid cavity is put into water level to be measured is just measured the pressure at this deep water place;
Described pressure transducer comprises dynamic pressure sensor and static pressure sensor, and described dynamic pressure sensor has the hole that is communicated with air cavity, and it is outer to measure this deep water dynamic pressure that its responsive part is positioned at the gas-liquid cavity; Described static pressure sensor is installed on the air cavity wall of gas-liquid cavity, and its responsive part is positioned at air cavity to measure the deep water static pressure.
2, a kind of deep-water pressure measurement mechanism of using the measuring method of the described deep-water pressure of claim 1 is characterized in that, this device comprises that it is 0.1 * 10 that permeability is installed in a bottom
-6-0.5 * 10
-6Cm
2The gas-liquid cavity of infiltration plate and be loaded on pressure transducer on the air cavity wall of this gas-liquid cavity;
Described pressure transducer comprises dynamic pressure sensor and static pressure sensor, and described dynamic pressure sensor has the hole that is communicated with air cavity, and its responsive part is positioned at outside the gas-liquid cavity; Described static pressure sensor is installed on the air cavity wall of gas-liquid cavity, and its responsive part is positioned at air cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159057 CN1220039C (en) | 2002-12-27 | 2002-12-27 | Measuring method and its device for deep water pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159057 CN1220039C (en) | 2002-12-27 | 2002-12-27 | Measuring method and its device for deep water pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1512156A CN1512156A (en) | 2004-07-14 |
| CN1220039C true CN1220039C (en) | 2005-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02159057 Expired - Fee Related CN1220039C (en) | 2002-12-27 | 2002-12-27 | Measuring method and its device for deep water pressure |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359309C (en) * | 2005-09-30 | 2008-01-02 | 合肥工业大学 | Pressure sensor in deep-sea and use thereof |
| CN103383295B (en) * | 2012-05-03 | 2015-10-21 | 上海大众汽车有限公司 | The comprehensive second pressure supervising device of hydrostatic support system and method |
| CN104215385A (en) * | 2014-09-30 | 2014-12-17 | 成都卓微科技有限公司 | Dual-diaphragm underwater pressure sensor for water pressure change measurement |
| CN104865044B (en) * | 2015-06-02 | 2017-08-04 | 天津大学 | A kind of Truss Spar platforms motion measurement experimental rig |
| CN109974927B (en) * | 2019-03-08 | 2021-05-25 | 绍兴京越智能科技有限公司 | Ankle wearing type intelligent device based on riparian gas-liquid mixing pressure detection |
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