CN102435176A - Device and method for measuring response to fluctuating pressure of wind generated wave lakebed of shallow lake - Google Patents
Device and method for measuring response to fluctuating pressure of wind generated wave lakebed of shallow lake Download PDFInfo
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- CN102435176A CN102435176A CN2011103591029A CN201110359102A CN102435176A CN 102435176 A CN102435176 A CN 102435176A CN 2011103591029 A CN2011103591029 A CN 2011103591029A CN 201110359102 A CN201110359102 A CN 201110359102A CN 102435176 A CN102435176 A CN 102435176A
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Abstract
The invention discloses a device and a method for measuring response to fluctuating pressure of a wind generated wave lakebed of a shallow lake. The device comprises a pressure sensor, a gas guide cable, a fixing bracket, a movable bracket, an upright post with scales, an acquisition card and a voltage stabilized direct-current source, wherein the pressure sensor is fixed at one end of the movable bracket; the other end of the movable bracket is fixed on the fixed bracket through a sleeve; the fixed bracket is fixed to a bed surface to be tested through a base plate; the bottom of the vertically moving upright post with the scales is fixed to the movable bracket; the pressure sensor is connected with the voltage stabilized direct-current source and the acquisition card through the gas guide cable; and the acquisition card is connected to a computer. The device can acquire 64,000 pressure data maximally in one second, and can accurately acquire the fluctuating pressure of wind generated waves.
Description
Technical field
What the present invention relates to is the measuring technique of a kind of water conservancy and water environment field of engineering technology, specifically is a kind of shallow lake measurement mechanism and method of the response of wave lakebed fluctuation pressure humorously.
Background technology
Stormy waves is wind-induced wave, and wind is to the water surface, and with the lake water friction, lake water receives wind action, ballooning, and the water surface begins to rise and fall, and forms wave.In shallow lake, because the depth of water is more shallow, stormy waves can produce very big influence for the bottom bed surface.From showing as the response that can have fluctuation pressure at the bottom in form, this fluctuation pressure is kicked up for water-bed silt outstanding movingly has very large influence, the pulsatile change of pressure to cause water body muddy, deteriorating water quality.Therefore, measure this fluctuation pressure accurately, improve lake water quality and all have very important significance for research lake sediment movement.
For the measurement of pressure, general adopts pressure sensor converts pressure into electric signal output during its work.Pressure transducer generally is made up of elastic sensing element and displacement sensitive element (or strainometer).The effect of elastic sensing element is to make by measuring pressure to act on certain area and convert displacement or strain into, converts the electric signal that becomes certain relation with pressure into by displacement sensitive element or strainometer then.
Retrieval through to the prior art document is found: Chinese patent publication number CN1537222; Open day: 2004.10.13, put down in writing a kind of " pressure converter ", it is characterized in that not being vulnerable to the interference that hydraulic pressure imports the error of position or places the depth of water; Can access and the accurate corresponding signal of effective soil pressure; In the space that is clamped between two rigid plate of bearing soil pressure, filtrator is installed, hydraulic pressure is had an effect, and the sand pressure is inoperative.But its shortcoming is, this equipment can't be used to measure the shallow lake lakebed fluctuation pressure that wave caused humorously, and structure is comparatively complicated, and volume is bigger, is inconvenient to carry.
The patent that another one is relevant with the present invention is; Chinese patent publication number CN101718605A; Open day: 2010.06.02, put down in writing a kind of " water pressure sensor and measuring method in Measurement of Dam, bottom, the rivers and lakes soil ", it is characterized in that the water in the soil gets into the pressure chamber through natural pelelith permeable membrane from the infiltration mouth; The effect of water pressure of process infiltration is on the 316L of Silicon pressure core body stainless steel diaphragm, and the Silicon pressure core body is experienced pressure and is converted into electric signal output; The electric signal of Silicon pressure core body output is transferred on the electric signal processing and amplifying plate, becomes electric current 4～20mA signal through electric signal amplification and voltage transitions; 4～20mA current signal is transferred to the control sampler chamber through output cable.Though the described technology of this patent can be measured the seepage pressure of inside soil body; But owing to lack critical components such as built-in anti-radio frequency, anti-electromagnetic interference (EMI) circuit; The shallow lake lakebed fluctuation pressure that wave caused humorously can't be measured, and the depth of water of measured place can't be confirmed accurately.
Summary of the invention
The present invention is directed to the above-mentioned deficiency that existing pressure measurement method exists, a kind of shallow lake measurement mechanism and the method for the response of wave lakebed fluctuation pressure humorously are provided, can collect the fluctuation pressure of wave humorously accurately.
The present invention realizes through following technical scheme:
Shallow lake of the present invention is the measurement mechanism of wave lakebed fluctuation pressure response humorously, comprising: pressure transducer, air guide cable, fixed support, movable supporting frame, the vertical rod of band scale, capture card, constant voltage dc source.Wherein pressure transducer is fixed on movable supporting frame one end, and the other end of movable supporting frame is fixed on the fixed support through sleeve, and fixed support is fixed on the bed surface that needs mensuration through base plate.The bottom of the vertical rod of band scale is fixed on the movable supporting frame, and the vertical rod of band scale can move up and down at vertical direction, and pressure transducer is connected with capture card with constant voltage dc source respectively through the air guide cable, and capture card is connected to computer.
Described pressure transducer adopts the presser sensor original paper, the digital compensation amplifying circuit of band microprocessor, stainless steel casing Laser Welding (LBW), built-in anti-radio frequency, anti-electromagnetic interference (EMI) circuit.
In the middle of the said support bracket fastened base plate a threaded perforate is set, support bracket fastened bottom is passed through.Base plate with holes is arranged on to be measured on the bottom, the vertical rod that is used to install and measure, and in base plate sinking installation course owing to have aperture, very little to the disturbance of water body CONCENTRATION DISTRIBUTION and water-bed bed mud.
Said fixed support top is provided with a perforate, and the vertical rod of band scale is passed through.
In the middle of the said movable supporting frame a threaded perforate is set, the vertical rod of band scale is passed through.
Described capture card is the iUSBDAQ capture card, and its effect is to gather voltage situation of change on the pressure transducer.
Described constant voltage dc source output voltage is 0-30V, and its effect is for pressure transducer 5V to be provided direct current.
Based on said apparatus, shallow lake of the present invention is the measuring method of wave lakebed fluctuation pressure response humorously, comprises the steps:
At first, confirm the depth of water of survey region, the position of adjustment movable supporting frame is located at the required position that sounds the depth of the water;
Secondly, pressure transducer is fixed on the movable supporting frame, this pressure transducer is connected with capture card with constant voltage dc source (5 volts of direct currents are provided) respectively through the air guide cable, and this capture card is connected with computer.
Then, movable supporting frame is fixed on the fixed support through sleeve, and fixed support is fixed on the bed surface through base plate.
At last, open constant voltage dc source respectively, computer, analysis software carries out data acquisition, accomplishes pressure survey and finishes.
The above-mentioned pressure transducer of the present invention adopts the presser sensor original paper; The digital compensation amplifying circuit of band microprocessor; The stainless steel casing Laser Welding (LBW), built-in anti-radio frequency, anti-electromagnetic interference (EMI) circuit have that high precision, high reliability, volume are little, a vibration resistance, the strong characteristics of antijamming capability.Its principle is the silicon strain-type; It is to utilize semi-conductive piezoresistive effect and micromachining technology, on the particular crystal orientation of monocrystalline silicon piece, manufactures a Wheatstone bridge with semiconductor technologies such as photoetching, diffusions; Form sensitive diaphragm; Do the time spent and produce microstrain when receiving external force, resistivity generation subtle change, make arm resistance change (a pair of change is big, a pair of to diminish) export at the driving voltage signal; Through technologies such as processing means such as computer temperature compensation, laser resistor trimming, signal amplification and strict assembling detection, demarcation, produce pressure unit with standard output signals.Among the present invention, voltage U (V) with the transforming relationship of pressure P (KPa) is:
P＝12.25U-6.125。
Compare with existing fluctuation pressure measuring method; The invention has the advantages that: at present for the measurement of lakebed pressure generally be the frequency collection that do not wait to a few minutes in 30 seconds once; Can't capture the lakebed fluctuation pressure; The pressure data that the present invention gathered in a second is the highest can to reach 64000, can collect the fluctuation pressure of wave humorously accurately.
Description of drawings
Fig. 1 is a bottom, cross-sectional view of the present invention.
Fig. 2 is that the present invention connects synoptic diagram.
Embodiment
Elaborate in the face of embodiments of the invention down, present embodiment is that prerequisite is implemented with technical scheme of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Shown in Fig. 1-2; Present embodiment is used to measure the bottom place fluctuation pressure in the lake that is positioned at 2.5 meters depth of waters, and the device of employing comprises: vertical rod 5, air guide cable 6, pressure transducer 7, capture card, the constant voltage dc source of spirit-leveling instrument 1, fixed support 2, movable supporting frame 3, band scale.Pressure transducer 7 is fixed on movable supporting frame 3 one ends, and the other end of movable supporting frame 3 is fixed on the fixed support 2 through sleeve, and fixed support 2 is fixed on the bed surface that needs mensuration through base plate 4.The bottom of the vertical rod 5 of band scale is fixed on the movable supporting frame 3, and the vertical rod 5 of band scale can move up and down at vertical direction, and pressure transducer 7 is connected with capture card with constant voltage dc source respectively through air guide cable 6, and capture card is connected to computer.
In the present embodiment, described fixed support 2 is made by stainless steel or other high strength and the material that is difficult for getting rusty, is arranged on the base plate, and its effect is to be used to install base plate with holes 4.
In the present embodiment; Described fixed support 2 can be provided with spirit-leveling instrument 1; Described spirit-leveling instrument 1 is full of yellow liquid by an airtight and transparent inside and has the cylinder of minute bubbles; Bowing one's head is arranged in the vertical rod 5 of band scale, and whether its effect is to be used to differentiate be with the vertical rod 5 of scale vertical when measuring.
In the present embodiment, described movable supporting frame 3 is made by stainless steel or other high strength and the material that is difficult for getting rusty, and the centre is provided with a threaded perforate, and the vertical rod 5 of band scale is passed through.
In the present embodiment; Described base plate 4 with holes is made by stainless steel or other high strength and the material that is difficult for getting rusty; Be arranged on and measure on the bottom; Its effect is the vertical rod 5 of the band scale that is used to install and measure, and in base plate sinking installation course owing to have aperture, very little to the disturbance of water body CONCENTRATION DISTRIBUTION and water-bed bed mud.
In the present embodiment, the vertical rod 5 of described band scale is made by stainless steel or other high strength and the material that is difficult for getting rusty, is arranged on the movable supporting frame 3.
In the present embodiment, described air guide cable 6 is made up of sheath and lead, external jacket waterproof, insulation.Its effect is to connect pressure transducer 7 and capture card, direct supply.
In the present embodiment, described pressure transducer 7 adopts the presser sensor original paper, the digital compensation amplifying circuit of band microprocessor, stainless steel casing Laser Welding (LBW), built-in anti-radio frequency, anti-electromagnetic interference (EMI) circuit.
In the present embodiment, described capture card is the iUSBDAQ capture card, and its effect is to gather voltage situation of change on the pressure transducer.
In the present embodiment, described constant voltage dc source output voltage is 0-30V, and its effect is for pressure transducer 5V to be provided direct current.
In the present embodiment, described computer has USB interface, and system is Windows XP or Windows 7.
Adopt above-mentioned described device, measure the method for the bottom place fluctuation pressure in the lake that is positioned at 2.5 meters depth of waters, specific as follows:
(1) bottom of the vertical rod 5 of band scale is fixed on the movable supporting frame 3, and removable 3 position is adjusted through fixed support 2 in top, and making the vertical rod reading of band scale is 2.4 meters;
(2) pressure transducer 7 is fixed on the movable supporting frame 3; Pressure transducer 7 is connected with capture card with constant voltage dc source (5 volts of direct currents are provided) respectively through air guide cable 6; Wherein green lead is just connecing constant voltage dc source in the air guide cable 6, and it is negative that the black lead connects constant voltage dc source, and blue lead connects the A10 mouth of USDDAQ on the capture card; The black lead is also received the AGND mouth of capture card USBDAQ simultaneously, and this capture card is connected with computer through dedicated transmission;
(3) other end with movable supporting frame 3 is fixed on the fixed support 2 through sleeve.Fixed support 2 is connected on the base plate 4 inserts bed surface, sighting-level 1 keeps vertically it;
(4) open constant voltage dc source respectively, computer, iDAQ Test&Log Software 3.1 softwares carry out data acquisition, and pressure survey finishes.
The said method capture card can be iUSBDAQ capture card etc.; Its frequency acquisition can freely be provided with; Can be under continuous STREAMING pattern in real time with the continual PC that collects of data, total percent of pass can reach per second 64000 times, and single pass percent of pass can reach 64000 per seconds.Data collecting card is connected on the computer, adopts free external software iDAQ Test&Log Software 3.1 to carry out the collection and the processing of data.
This device of the present invention is simple to operate, is easy to carry, and cost is lower, is suitable for the characteristics of field sampling work, can adapt to various field sampling conditions.Simultaneously, can collect lakebed accurately because the fluctuation pressure that wave produced humorously.
Claims (10)
1. the shallow lake measurement mechanism of wave lakebed fluctuation pressure response humorously is characterized in that comprising: pressure transducer, air guide cable, fixed support, movable supporting frame, the vertical rod of band scale, capture card and constant voltage dc source; Wherein pressure transducer is fixed on movable supporting frame one end, and the other end of movable supporting frame is fixed on the fixed support through sleeve, and fixed support is fixed on the bed surface that needs mensuration through base plate; The bottom of the vertical rod of the band scale that can move up and down at vertical direction is fixed on the movable supporting frame, and pressure transducer is connected with capture card with constant voltage dc source respectively through the air guide cable, and capture card is connected to computer.
2. shallow lake according to claim 1 is the measurement mechanism of wave lakebed fluctuation pressure response humorously; It is characterized in that: described pressure transducer adopts the presser sensor original paper; The digital compensation amplifying circuit of band microprocessor; The stainless steel casing Laser Welding (LBW), built-in anti-radio frequency, anti-electromagnetic interference (EMI) circuit.
3. shallow lake according to claim 1 and 2 is the measurement mechanism of wave lakebed fluctuation pressure response humorously, it is characterized in that: be provided with one in the middle of the said support bracket fastened base plate and just make perforate that support bracket fastened bottom is passed through, threaded.
4. shallow lake according to claim 3 is the measurement mechanism of wave lakebed fluctuation pressure response humorously, it is characterized in that: said fixed support top be provided with one the vertical rod of band scale is passed through perforate.
5. shallow lake according to claim 1 and 2 is the measurement mechanism of wave lakebed fluctuation pressure response humorously, it is characterized in that: be provided with one in the middle of the said movable supporting frame and just make pass through, the threaded perforate of vertical rod of being with scale.
6. shallow lake according to claim 1 and 2 is the measurement mechanism of wave lakebed fluctuation pressure response humorously, and it is characterized in that: described capture card is the iUSBDAQ capture card, gathers voltage situation of change on the pressure transducer.
7. shallow lake according to claim 1 and 2 is the measurement mechanism of wave lakebed fluctuation pressure response humorously, and it is characterized in that: described constant voltage dc source output voltage is 0-30V, for pressure transducer provides 5V direct current.
8. a shallow lake that adopts each said device of the claim 1-7 measuring method of wave lakebed fluctuation pressure response humorously is characterized in that comprising the steps:
At first, confirm the depth of water of survey region, the position of adjustment movable supporting frame is located at the required position that sounds the depth of the water;
Secondly, pressure transducer is fixed on the movable supporting frame, this pressure transducer is connected with capture card with constant voltage dc source respectively through the air guide cable, and this capture card is connected with computer;
Then, movable supporting frame is fixed on the fixed support through sleeve, and fixed support is fixed on the bed surface through base plate;
At last, open constant voltage dc source respectively, computer is gathered and is handled, and accomplishes pressure survey and finishes.
9. shallow lake according to claim 8 is the measuring method of wave lakebed fluctuation pressure response humorously, and it is characterized in that: said capture card is the iUSBDAQ capture card, and its frequency acquisition freely is provided with.
10. it is characterized in that according to Claim 8 or the 9 described shallow lakes measuring method of wave lakebed fluctuation pressure response humorously: said collection and handle and adopt iDAQ Test&Log Software 3.1 softwares to carry out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110359102 CN102435176B (en) | 2011-11-14 | 2011-11-14 | Device and method for measuring response to fluctuating pressure of wind generated wave lakebed of shallow lake |
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| CN 201110359102 CN102435176B (en) | 2011-11-14 | 2011-11-14 | Device and method for measuring response to fluctuating pressure of wind generated wave lakebed of shallow lake |
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| CN102435176A true CN102435176A (en) | 2012-05-02 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983179A (en) * | 2014-05-30 | 2014-08-13 | 合肥国轩高科动力能源股份公司 | Battery thickness change detecting device and battery safety detecting and judging method |
| CN104240579A (en) * | 2014-08-06 | 2014-12-24 | 中国人民解放军海军工程大学 | Microbubble circulating water channel |
| CN104374544A (en) * | 2014-12-10 | 2015-02-25 | 中国人民解放军海军工程大学 | Asymmetric measuring device for propeller pulsating pressure |
| CN104655108A (en) * | 2015-03-05 | 2015-05-27 | 中国科学院南京地理与湖泊研究所 | Shallow lake longitudinal section observing device |
| CN106596050A (en) * | 2017-02-20 | 2017-04-26 | 水利部交通运输部国家能源局南京水利科学研究院 | Three-dimensional wind-driven water running power simulation experiment apparatus and method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04181117A (en) * | 1990-11-15 | 1992-06-29 | Nippon Boshoku Kogyo Kk | Device for measuring water-depth position and potential of a metal structure under water surface |
| CN2432548Y (en) * | 2000-08-01 | 2001-05-30 | 中国科学院南海海洋研究所 | Pressure type wave and sea level measuring storage device |
| JP3329772B2 (en) * | 1999-09-17 | 2002-09-30 | 飛島建設株式会社 | Ground settlement amount detection device and settlement amount measurement system |
| CN1575426A (en) * | 2001-09-27 | 2005-02-02 | 乔西拉公司 | In situ method for determining soil liquefaction tendency and its prevention by electro-osmosis |
| CN201429486Y (en) * | 2009-07-06 | 2010-03-24 | 洪勇 | Probe type soil body pore space water pressure measuring meter |
| CN201903348U (en) * | 2010-11-22 | 2011-07-20 | 同济大学 | Monitoring device for soil displacement and pore water pressure of seabed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE522006C2 (en) * | 2002-05-29 | 2004-01-07 | Tps Termiska Processer Ab | Control of a cyclone burner |
-
2011
- 2011-11-14 CN CN 201110359102 patent/CN102435176B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04181117A (en) * | 1990-11-15 | 1992-06-29 | Nippon Boshoku Kogyo Kk | Device for measuring water-depth position and potential of a metal structure under water surface |
| JP3329772B2 (en) * | 1999-09-17 | 2002-09-30 | 飛島建設株式会社 | Ground settlement amount detection device and settlement amount measurement system |
| CN2432548Y (en) * | 2000-08-01 | 2001-05-30 | 中国科学院南海海洋研究所 | Pressure type wave and sea level measuring storage device |
| CN1575426A (en) * | 2001-09-27 | 2005-02-02 | 乔西拉公司 | In situ method for determining soil liquefaction tendency and its prevention by electro-osmosis |
| CN201429486Y (en) * | 2009-07-06 | 2010-03-24 | 洪勇 | Probe type soil body pore space water pressure measuring meter |
| CN201903348U (en) * | 2010-11-22 | 2011-07-20 | 同济大学 | Monitoring device for soil displacement and pore water pressure of seabed |
Non-Patent Citations (1)
| Title |
|---|
| 赵英男，许建新，赵越: "测量压力脉动的动态压力传感器的标定方法", 《电站系统工程》, vol. 26, no. 2, 31 March 2010 (2010-03-31), pages 61 - 62 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983179A (en) * | 2014-05-30 | 2014-08-13 | 合肥国轩高科动力能源股份公司 | Battery thickness change detecting device and battery safety detecting and judging method |
| CN103983179B (en) * | 2014-05-30 | 2016-08-17 | 合肥国轩高科动力能源有限公司 | The detection of cell thickness change detecting device, cell safety and determination methods |
| CN104240579A (en) * | 2014-08-06 | 2014-12-24 | 中国人民解放军海军工程大学 | Microbubble circulating water channel |
| CN104374544A (en) * | 2014-12-10 | 2015-02-25 | 中国人民解放军海军工程大学 | Asymmetric measuring device for propeller pulsating pressure |
| CN104655108A (en) * | 2015-03-05 | 2015-05-27 | 中国科学院南京地理与湖泊研究所 | Shallow lake longitudinal section observing device |
| CN106596050A (en) * | 2017-02-20 | 2017-04-26 | 水利部交通运输部国家能源局南京水利科学研究院 | Three-dimensional wind-driven water running power simulation experiment apparatus and method thereof |
| CN106596050B (en) * | 2017-02-20 | 2023-09-05 | 水利部交通运输部国家能源局南京水利科学研究院 | Three-dimensional wind-driven and hydrodynamic simulation experiment device and method |
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