CN2456142Y - Indirect level meter with hydraulic sensor - Google Patents
Indirect level meter with hydraulic sensor Download PDFInfo
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- CN2456142Y CN2456142Y CN 00251963 CN00251963U CN2456142Y CN 2456142 Y CN2456142 Y CN 2456142Y CN 00251963 CN00251963 CN 00251963 CN 00251963 U CN00251963 U CN 00251963U CN 2456142 Y CN2456142 Y CN 2456142Y
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- pressure
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- hydraulic hose
- water level
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Abstract
The utility model relates to a hydraulic sensing indirect level meter, which belongs to the technical field of liquid level measuring. The utility model comprises a pressure sensor and a level display, wherein, the pressure sensor is fixed on a float; the pressure sensor is connected with a hydraulic hose through a sealing fixing joint, and the other end of the hydraulic hose is a hydraulic hose fixing component which is fixed on the bank; one end of a ventilating cable is connected with the pressure sensor, and the other end is connected with the level display. The utility model has the advantages of convenient and simple installation and maintenance, the indirect measuring of which separates from the influence of unstable factors of measured material; measuring accuracy and stability of the utility model is superior to an underwater direct measuring mode, and furthermore, the utility model can prolong the service life of the pressure sensor.
Description
The utility model belongs to the level gauging technical field, relates to a kind of hydraulic sensing and measures water level gauge indirectly.
In the main water level gauge that is adopted on the hydrology, modal is float type level meter at present.Because the civil engineering expense rises steadily, the pressure type water level gauge that need not the water level well logging causes people more and more to pay attention to working pressure formula water level gauge along with the development and progress of modern technologies is also stable and ripe day by day in recent years.The pressure type water level gauge mainly is used in rivers, lake, reservoir and other natural water body, need not to build the water level well logging, realizes functions such as water level teletransmission demonstration, solid-state storage, coding output.The pressure type water level gauge is by level sensor, ventilate cable and signal-transmitting cable waterborne, water level display etc. are formed under water, wherein critical component is a level sensor, what the sensor here adopted is pressure transducer, its principle is to utilize pressure transducer to respond to hydrostatic force, and the relation that is directly proportional to water surface distance and measuring point hydrostatic force according to measuring point records the depth of water.Pressure transducer has current potential formula, condenser type, electrodynamic type, change magnetic-type, piezoelectric type, resonant mode, pressure group formula etc., because the integrated pressure group of diffuse si formula pressure sensing appliance has many good qualities, its linearity, sluggishness, reproducibility error are all very little.Pressure transducer adopts import or homemade solid-state piezoresistive transducer usually at present, and this chip is the technology that adopts integrated circuit, diffuses into resistor stripe and form one group of resistance on silicon chip, forms the full electric bridge of Hui Sideng.Because silicon crystal has piezoresistive effect, after the silicon response body was subjected to the hydrostatic force effect, wherein the electrostrictive strain resistive of two correspondences was big, and the strain resistor of two correspondences diminishes in addition, cause the Wheatstone bridge out of trim, export a voltage signal corresponding to the hydrostatic force size.Signal voltage value can be accurately measured with accurate digital measurement circuit again, water level value can be obtained by conversion.
The pressure type water level gauge is measured water level principle (see figure 1): pressure type water level gauge sensing head is installed under water the elevation at zero point, and the known water volume density, the measuring point depth of water is:
In H=P/r (1) formula: H---measuring point is to the distance of the water surface
The hydrostatic force of P---measuring point
The density of r---water body is generally 1 depth of water and adds the level elevation of this point and obtain water level value.
The pressure type water level gauge selects for use domestic advanced person's sensor supporting, need not well logging, invest less, install to survey and unload conveniently, be specially adapted to build well logging or the inconvenient place of shaft building and interim observation usefulness, instrument has solved atmospheric pressure, wave substantially, factors such as drift have been guaranteed accuracy of instrument to the key technology problems of level measuring precision influence.But because it is subjected to the influence of various extraneous factors serious, particularly silt content, water body salineness, flow velocity etc. are very big to the influence of pressure type water level gauge measuring accuracy.Pressure type water level gauge tradition using method is that sensing head is installed in water-bed depths, mainly contains following shortcoming: 1, the sensor pressure sensing hole is stopped up by mud or sandstone easily, and this will have a strong impact on the measurement of sensor; 2, sensor is installed in the bottom, and its installation and maintenance is brought very big inconvenience; 3, sensor directly contacts with measurement of species (water body), and the pressure characteristic of substances to be measured constantly changes, and the therefore extraneous measuring error that causes will be inevitable.Water body salineness or contain other solable matter and will cause the water body variable density, according to formula (1) as can be known, water body density will directly have influence on the level measuring value, and generally speaking, it is 1 ± 0.1% water body that pressure transducer can only be used for density.When being used for the water body of other density, should revise measured value according to formula (1).Water body density often changes, and variable quantity surpasses at 0.1% o'clock, and sensor can't use.The size of silt content also will directly have influence on water body density, and the silt content of actual measurement water body will make the measured value of pressure water level gauge bigger than normal than actual water level.The pressure that flow velocity produces will cause that the level measuring value is bigger than normal if be introduced in the pressure-sensitive face of pressure transducer, if the current streamline produces break-off at the pressure-sensitive face place of sensor, can cause that then the level measuring value is less than normal.Just because of these reasons, at present, still there is certain obstacle in the use in the pressure type water level gauge.
The purpose of this utility model is in order to solve will the dive beneath the water difficulty of installation and maintenance of present pressure transducer, and factor such as water body silt content, salineness, flow velocity has proposed a kind of hydraulic sensing that utilizes pressure transducer to measure water level indirectly and has measured water level gauge indirectly the influence of pressure water level instrumentation accuracy of measurement.
The purpose of this utility model realizes with the following methods.This hydraulic sensing is measured water level gauge indirectly and is comprised pressure transducer, water level display, pressure transducer is fixed on the float, pressure transducer is connected with hydraulic hose by the sealing fastening, the other end of hydraulic hose is the hydraulic hose fixture that is fixed on the bank, have ventilation cable one end to be connected with pressure transducer, the other end is connected with water level display.The utility model is not measured the pressure that water body itself produces, but pressure transducer is bubbled through the water column, and sensor pressure-sensitive face is concordant with the water surface, and sensor is connected with hydraulic hose, and the pressure of sensor is to be produced by the water or the liquid that are contained in the hydraulic hose.During measurement, pressure transducer is installed on the float, it is bubbled through the water column, the hydraulic hose other end is fixed on the riverbank, the ventilation cable is bubbled through the water column, hydraulic hose (water-filling) average density and water body density are basic identical, and promptly buoyancy and the gravity of hydraulic hose (water-filling) in water should not influence the height that sensor emerges.When SEA LEVEL VARIATION, sensor will change with fluctuation in stage under the effect of float, and liquid can the tested SEA LEVEL VARIATION of linear reflection to the pressure of sensor pressure-sensitive face in the hydraulic hose.According to hydraulic principle, liquid in the hydraulic hose is only relevant with the hydraulic hose internal diameter to the vertical range of the water surface with the riverbank measuring point to the pressure that sensor produces, as long as and make the area of the sectional area of hydraulic hose, the pressure independent that all sensor produced of hydraulic hose internal diameter size, hydraulic hose length and camber then more than or equal to pressure transducer pressure-sensitive face.
Below in conjunction with the embodiment accompanying drawing the utility model is described in further detail.
Fig. 1 wirking pressure formula water level gauge is measured the water level schematic diagram
Fig. 2 the utility model is measured the water level schematic diagram
------------------sensor hydraulic pressure is introduced hole, 7---hydraulic hose, 8---water level display, 9---display panel, 10---hydraulic hose fixture, 11---liquid (water) to float cavity 5 to float, 4 to ventilation cable, 3 to pressure transducer, 2 in sealing fastening, 6 among Fig. 3 the utility model structural representation figure: 1
Pressure sensing is measured water level gauge indirectly and measured water level principle (see figure 2): float (3) is bubbled through the water column pressure transducer (1), pressure transducer (1) pressure-sensitive face is concordant with the water surface, hydraulic hose (7) one ends are connected with pressure transducer hydraulic pressure entrance hole, the other end is fixed on riverbank reference measurement point, and ventilation cable (2) is connected with water level display (8).The fluid pressure that the riverbank reference measurement is put the generation of river surface vertical range will react the water level height.Known fluid density, measuring point apart from water surface vertical range is:
ΔH=P/r (2)
In H=HO-Δ H (3) formula: H---measured water level
HO---measurement point elevation
Δ H---the riverbank measurement point is to water surface distance
P---liquid produces the pressure that is reflected by pressure transducer in the hydraulic hose at the water surface
R---fluid density in the hydraulic hose
The pressure transducer that uses in the present embodiment (1) can adopt BP93420-II type pressure unit, and selects supporting with it water level display (8) for use.
The utility model is bubbled through the water column pressure transducer (1), and it is convenient for installation and maintenance simple; Utilize the pressure that liquid produces in the hydraulic hose (7) to measure indirectly, broken away from the influence of measured matter labile factor fully, its measuring accuracy and stability is all than directly metering system is superior under water, and can prolong pressure transducer (1) serviceable life.This is that a kind of hydraulic principle that utilizes is measured the ideal of water depth and the surveying instrument with development prospect.
Claims (1)
1, a kind of hydraulic sensing is measured water level gauge indirectly, comprise pressure transducer (1), water level display (8), it is characterized in that pressure transducer (1) is fixed on the float (3), pressure transducer (1) is connected with hydraulic hose (7) by sealing fastening (5), the other end of hydraulic hose (7) is the hydraulic hose fixture (10) that is fixed on the bank, have ventilation cable (2) one ends to be connected with pressure transducer (1), the other end is connected with water level display (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00251963 CN2456142Y (en) | 2000-11-30 | 2000-11-30 | Indirect level meter with hydraulic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00251963 CN2456142Y (en) | 2000-11-30 | 2000-11-30 | Indirect level meter with hydraulic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2456142Y true CN2456142Y (en) | 2001-10-24 |
Family
ID=33609727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00251963 Expired - Fee Related CN2456142Y (en) | 2000-11-30 | 2000-11-30 | Indirect level meter with hydraulic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2456142Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592000A (en) * | 2013-11-25 | 2014-02-19 | 重庆纤度科技有限公司 | Liquid level measuring device |
| CN106092255A (en) * | 2016-08-29 | 2016-11-09 | 成都汉康信息产业有限公司 | A kind of river level detection alarm device |
| CN106153150A (en) * | 2015-03-09 | 2016-11-23 | 天津奥优星通传感技术有限公司 | A kind of throwing type Level monitor |
| CN109764927A (en) * | 2019-03-14 | 2019-05-17 | 长沙学院 | Float-type intelligence solution deep measuring device and measuring method |
| CN112923995A (en) * | 2021-01-28 | 2021-06-08 | 河北省廊坊水文勘测研究中心(河北省廊坊水平衡测试中心) | Prevent silt probe and fluviograph |
-
2000
- 2000-11-30 CN CN 00251963 patent/CN2456142Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592000A (en) * | 2013-11-25 | 2014-02-19 | 重庆纤度科技有限公司 | Liquid level measuring device |
| CN106153150A (en) * | 2015-03-09 | 2016-11-23 | 天津奥优星通传感技术有限公司 | A kind of throwing type Level monitor |
| CN106092255A (en) * | 2016-08-29 | 2016-11-09 | 成都汉康信息产业有限公司 | A kind of river level detection alarm device |
| CN109764927A (en) * | 2019-03-14 | 2019-05-17 | 长沙学院 | Float-type intelligence solution deep measuring device and measuring method |
| CN109764927B (en) * | 2019-03-14 | 2023-12-19 | 长沙学院 | Float type intelligent solution depth measuring device and measuring method |
| CN112923995A (en) * | 2021-01-28 | 2021-06-08 | 河北省廊坊水文勘测研究中心(河北省廊坊水平衡测试中心) | Prevent silt probe and fluviograph |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |