CN109489626A - Hydraulic sensing surface settlement meter and settlement measurement method - Google Patents
Hydraulic sensing surface settlement meter and settlement measurement method Download PDFInfo
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- CN109489626A CN109489626A CN201710824274.6A CN201710824274A CN109489626A CN 109489626 A CN109489626 A CN 109489626A CN 201710824274 A CN201710824274 A CN 201710824274A CN 109489626 A CN109489626 A CN 109489626A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/04—Hydrostatic levelling, i.e. by flexibly interconnected liquid containers at separated points
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Abstract
The present invention provides a kind of hydraulic sensing surface settlement meter and settlement measurement method, comprising: settle plate, the protective shell being connected with sedimentation plate, the mounting seat being placed in below protective shell, and it is placed in the drying tube from top to bottom set gradually in protective shell, fluid reservoir and hydrostatic sensor, dried medium is filled in drying tube, liquid is contained in fluid reservoir, the bottom of drying tube is connected by connecting tube with the top of the fluid reservoir, the top of drying tube is connected by tracheae with the ventilation end of the hydrostatic sensor, the bottom end of fluid reservoir is connected by liquid pipe and the hydrostatic sensor by pressure side, the hydrostatic sensor has the communication unit being connected with external equipment.The present invention is formed a confined space by pressure side and ventilation end using liquid storage filling, drying tube, tracheae, liquid pipe and hydrostatic sensor, and whole system is isolated from the outside world, is not influenced by change of atmospheric pressure, temperature change, improves the accuracy of settlement measurement.
Description
Technical field
The present invention relates to the technical fields of detection surface subsidence, more particularly to a kind of hydraulic sensing surface settlement meter and its
Measurement method.
Background technique
In the engineering for being related to soil solidifying such as reclaim fields from the sea, fill out extra large fill, land-based area formation, foundation stabilization, usually need
Soil body sedimentation is observed, to monitor soil body stability, determines fill core concrete；To calculate ground consolidation degree, unloading is determined
Time.Currently used surface settlement observation method is to be carried out using sedimentation plate and sedimentation bar using optical means such as levels
Observation.As construction scale increases, optical means is observed the datum mark or datum mark for being often difficult to find settlement stability
Far, observation is very inconvenient, and precision is poor；Cost of labor rises year by year in recent years, and optical means observation expends a large amount of manpower moneys
Source, and automatic observation is difficult to realize on the basis of this method；The interval time of artificial observation is longer, is not suitable for continuously being seen
It surveys；Settlement observation needs are carried out since fill in filling out the engineerings such as extra large fill, are settled the depth of water at plate at this time and are likely to be breached 10 meters,
Sedimentation bar is difficult to stand in the seawater of flowing, and is likely to be breached several kilometers apart from bank, and it is difficult to protect, and observes difficulty
Also very big.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of hydraulic sensing surface settlements
Meter, the test for solving the problems, such as to be difficult to fast and accurately realize surface settlement amount in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a kind of hydraulic sensing surface settlement meter comprising:
Sedimentation plate, the protective shell being connected with sedimentation plate, the mounting seat being placed in below protective shell, and be placed in protective shell from top to bottom
Drying tube, fluid reservoir and the hydrostatic sensor set gradually, drying tube is interior to be filled with dried medium, is contained with liquid in fluid reservoir
The bottom of body, drying tube is connected by connecting tube with the top of the fluid reservoir, the top of drying tube by tracheae with it is described
The ventilation end of hydrostatic sensor is connected, and the bottom end of fluid reservoir is connected by liquid pipe and the hydrostatic sensor by pressure side,
The hydrostatic sensor has the communication unit being connected with external equipment.
Preferably, the protective shell is divided into protective shell, lower protective shell, is provided with pipeline between upper protective shell and lower protective shell
Protective case, the drying tube and the fluid reservoir are placed in protective shell, and the hydrostatic sensor is placed in the lower protective shell,
The liquid pipe, the tracheae are threaded through in the pipe protection set.
Preferably, the epoxy resin sealer filled with the fixed drying tube and the fluid reservoir in the upper protective shell
Material.
Preferably, the epoxy resin sealants filled with the fixed hydrostatic sensor in the lower protective shell.
Preferably, the dried medium is silica-gel desiccant.
Preferably, glycol water is filled in the liquid storage filling and liquid pipe, and the amount of solution in liquid storage filling is liquid storage
Fill the 75%~90% of volume.
Preferably, the drying tube and it is described intratracheally be filled with natural air.
Preferably, the hydrostatic sensor includes diffused-silicon pressure sensing element and constant current drive wiring board, the communication
Unit is signal cable, and signal cable is extended in the sedimentation plate by protective shell to be stretched out.
Preferably, the communication unit output RS485 communication signal or 4-20ma current signal.
Preferably, the hydrostatic sensor is placed in a stainless steel protection shell.
Preferably, the ventilation end of the hydrostatic sensor connects capillary made of a copper or nylon, and capillary is logical
Ferrule fitting is crossed to be connected with the tracheae.
The present invention also provides a kind of settlement measurement method using above-mentioned hydraulic sensing surface settlement meter, the sedimentation is surveyed
Amount method includes:
1) pressure value calibration is carried out to the hydrostatic sensor, when zero head adjusts the hydrostatic sensor output electric current and is
Initial value a1；Full scale head value when calibration is denoted as H, adjusts hydrostatic sensor described in corresponding full scale head value and exports electric current
For maximum value a2, and record the liquid storage under the conditions of Current Temperatures fill in liquid density；The hydraulic biography is installed after calibration
Feel surface settlement meter, full scale head value refers to height distance of the sedimentation plate apart from the hydrostatic sensor after installation；
2) initial value is tested: test obtains the initial current value I of the hydrostatic sensor0, and record Current Temperatures item
The density of the liquid storage pot liquid under part is denoted as the density p of liquid under the conditions of initial value test moment temperature0；
3) settlement observation: test obtains the settlement observation moment current value I of hydrostatic sensor when observation sedimentationi, and
And the density of the liquid storage pot liquid under the conditions of Current Temperatures is recorded, it is denoted as liquid under the conditions of settlement observation test moment temperature
Density pi；
4) data according to recorded in step 2) and step 3), carry out calculating current settling amount Δ s:
Δ s=((I0-a1)/(a2-a1)×H–ΔH0C–ΔH0T)–((Ii-a1)/(a2-a1)×H–ΔHiC–ΔHiT)
Wherein, settling amount of the Δ s-- from initial value test moment to the settlement observation moment；
I0、Ii-- initial current value and settlement observation moment current value；
A1, a2-- hydrostatic sensor export the calibration initial value and calibration maximum value of electric current；
Full scale head value when H------- is demarcated；
ΔH0CThe moment is demarcated to the initial value test moment because of change of water level value caused by liquid pipe temperature change；
ΔH0TChange of water level value caused by the calibration moment changes to the initial value test moment because of fluid temperature；
ΔHiCMoment to the settlement observation moment is demarcated because of change of water level value caused by liquid pipe temperature change；
ΔHiTChange of water level value caused by calibration moment to the settlement observation moment changes because of fluid temperature.
As described above, hydraulic sensing surface settlement meter and settlement measurement method of the invention, have the advantages that
Using fluid pressure difference as test physical quantity, settling amount of the expression sedimentation plate relative to reference for installation；It is filled using liquid storage, is dry
Dry pipe, tracheae, liquid pipe and hydrostatic sensor are formed a confined space by pressure side and ventilation end, whole system and it is extraneous every
Absolutely, not by change of atmospheric pressure, temperature change influences, and improves the accuracy of settlement measurement；In addition, hydraulic sensing table of the invention
Layer settlement gauge can be used drilling and bury, and observation benchmark is arranged in soil layer depths, not influenced by live reference point displacement；The present invention is suitable
It answers very capable, can be applied to various environment, especially adverse circumstances are more advantageous, such as reclaim fields from the sea, marine fill
Surface settlement (sedimentation at the original mud face in seabed) observation in equal water conservancy projects relevant item.
Detailed description of the invention
Fig. 1 is shown as hydraulic sensing surface settlement meter schematic diagram of the invention.
Fig. 2 is shown as upper protective shell schematic diagram of internal structure of the invention.
Fig. 3 is shown as lower protective shell schematic diagram of internal structure of the invention.
Component label instructions
100 sedimentation plates
101 ring flanges
Protective shell on 102
103 pipe protection sets
104 lower protective shells
105 mounting seats
200 fluid reservoirs
201 drying tubes
202 tracheaes
203 liquid pipes
205 signal cables
300 hydrostatic sensors
301 capillaries
304 ferrule fittings
305 hydrostatic sensors by pressure side
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
It please refers to Fig.1 to Fig.3.It should be clear that structure, ratio, size etc. depicted in this specification institute attached drawing, only to
Cooperate the revealed content of specification, so that those skilled in the art understands and reads, being not intended to limit the invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, it should all still fall in disclosed skill
In the range of art content can cover.Meanwhile in this specification it is cited as "upper", "lower", "left", "right", " centre " and
The term of " one " etc. is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, relativeness
It is altered or modified, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1 to Figure 3, the present invention provides a kind of hydraulic sensing surface settlement meter comprising: it settles plate 100 and sinks
The connected protective shell of plate 100, the mounting seat 105 being placed in below protective shell are dropped, and is placed in protective shell from top to bottom successively
Drying tube 201, fluid reservoir 200 and the hydrostatic sensor 300 of setting, drying tube 201 is interior to be filled with dried medium, fluid reservoir
Liquid is contained in 200, the bottom of drying tube 201 is connected by connecting tube with the top of the fluid reservoir 200, drying tube
201 top is connected by tracheae 202 with the ventilation end of the hydrostatic sensor 300, and the bottom end of fluid reservoir 200 passes through liquid pipe
203 be connected with the hydrostatic sensor 300 by pressure side 305, and the hydrostatic sensor 300 has to be connected with external equipment
Communication unit.The present invention fills the compression of 200, drying tube 201, tracheae 202, liquid pipe 203 and hydrostatic sensor 300 using liquid storage
End and ventilation end form a confined space, and using fluid pressure difference as test physical quantity, expression sedimentation plate 100 is opposite
In the settling amount of reference for installation, whole system is isolated from the outside world, and not by change of atmospheric pressure, temperature change influences, and improves sedimentation
The accuracy of measurement.
To be easily installed, and various environment are adapted to, protective shell is divided into protective shell 102, lower protective shell in the present embodiment
104, pipe protection set 103 is provided between upper protective shell 102 and lower protective shell 104, as shown in Figure 1；Drying tube 201 and the storage
Flow container 200 is placed in protective shell 102, as shown in Figure 2；The hydrostatic sensor 300 is placed in the lower protective shell 104, institute
State liquid pipe 203, the tracheae 202 is threaded through in the pipe protection set 103.Protective shell is divided into up and down independently in the present embodiment
Upper protective shell 102 and lower protective shell 104, can be set as needed intermediate connection length in this way, i.e., pipe protection set 103,
Liquid pipe 203 and the length of tracheae 202 can be arbitrarily arranged, and adapt to various environment.
The connecting tube that above-mentioned liquid storage filling 200 and drying tube 201 are connected in the present embodiment is that 2 points of PE are managed, 202 top of tracheae
180 degree it is curved after with connect at the top of drying tube, liquid pipe 203 is managed using 3 points of PE, and tracheae 202, liquid pipe 203 pass through pipe protection set
It is extended in lower protection shell 104 after 103 protections, pipe protection set 103 is plastics sebific duct in the present embodiment.For convenience of gas
The connection of pipe 202 and hydrostatic sensor 300, capillary made of the ventilation end copper or nylon of hydrostatic sensor in the present embodiment
Pipe 301 connects and connecting sleeve connector 304, and ferrule fitting 304 is connect with tracheae 202.
Epoxy resin in the present embodiment filled with fixed drying tube 201 and the fluid reservoir 200 in upper protective shell 102 is close
Seal material.Epoxy resin sealants filled with the fixed hydrostatic sensor 300 in lower protective shell 104.Settle plate 100 with
It is connected between upper protection shell 102 using ring flange 101.Pvc pipe production can be used in upper protective shell 102 and lower protective shell 104.
1 cun of coating steel pipe can be used in above-mentioned mounting seat 105, is connect with jointing with lower protective shell 104.
Hydrostatic sensor 300 includes diffused-silicon pressure sensing element and constant current drive wiring board in the present embodiment, and communication is single
Member is signal cable 205, and signal cable 205 is extended in sedimentation plate 100 by protective shell to be stretched out.It is logical that communication unit exports RS485
Signal or 4-20ma current signal are interrogated, wireless signal transmission can also be used.Hydrostatic sensor 300 can be placed in a stainless steel
In protective shell body.
The dried medium filled in above-mentioned drying tube 201 in the present embodiment, can be silica-gel desiccant, drying tube and institute
It states intratracheally filled with natural air, dried medium need to only meet it and not decompose after moisture absorption；The master of above-mentioned drying tube 201
Wanting function is to absorb the evaporation water of liquid, keeps dry inside tracheae 202, capillary 301 and hydrostatic sensor ventilation end
It is dry, completely cut off liquids and gases using drying tube.Above-mentioned liquid storage filling 200, drying tube 201, liquid pipe 203, tracheae 202, hydraulic sensing
Device 300, capillary 301 form a confined space.Liquid storage fills 75%~90% liquid that its volume is filled in 200, liquid pipe
Hydraulically full in 203, liquid uses glycol water.Liquid storage fills 200 top no liquid space and drying tube 201, tracheae
202, natural air is full of in capillary 301, and air pressure everywhere is equal.It is influenced when natural air receives ambient temperature, it is closed
When air pressure in space changes, hydrostatic sensor 300 is identical with ventilation end gas pressure change by pressure side, gas when measurement
Pressure value automotive resistance, the pressure of hydrostatic sensor 300 tested by pressure side are always the pressure that liquid generates, that is to say, that
In the present invention hydrostatic sensor detect always be liquid generate pressure, it is unrelated with environmental change.
Above-mentioned liquid storage fills and fills glycol water in 200 and liquid pipe 203, and it is storage that liquid storage, which fills the amount of solution in 200,
Liquid fills the 75%~90% of volume.The amount that above-mentioned liquid storage fills 200 inside filling liquid is controlled 75%~90%, mainly according to
Installation waterborne is different with land installing environmental conditions.The upper verticality for protecting shell 102 more difficult to control when installation waterborne, in order to
Prevent the control liquid filling because the ambassador's liquid that is tilted over when installing is directly entered drying tube 201 and makes dry tube failure
Amount is 75%, and it is waterborne be installed after entire settlement gauge sink under water temperature change very little, liquid evaporation amount very little 75%
Liquid loading can meet the evaporation requirement in the settlement gauge entire service life phase enough.It is easier to control when land installation
The verticality of shell 102 is protected in system, the control of liquid loading can preferably meet evaporation and require 90%.
The present invention also provides a kind of settlement measurement methods using above-mentioned hydraulic sensing surface settlement meter comprising:
1) pressure value calibration is carried out to the hydrostatic sensor, when zero head (no liquid pressure) value, adjusts hydraulic sensing
Device makes to export electric current calibration initial value a1, and a1 is 4ma in the present embodiment；Full scale head value when calibration is denoted as H, full scale
When head value, the hydrostatic sensor output electric current is adjusted as calibration maximum value, a2 is 20ma. in the present embodiment and record is worked as
The liquid storage fills the density of interior liquid under the conditions of preceding temperature；The hydraulic sensing surface settlement meter, full scale water are installed after calibration
Header value refers to height distance of the sedimentation plate apart from the hydrostatic sensor after installation；
2) initial value is tested: test obtains the initial current value I of the hydrostatic sensor0, and record Current Temperatures item
The density of the liquid storage pot liquid under part is denoted as the density p of liquid under the conditions of initial value test moment temperature0；
3) settlement observation: test obtains the settlement observation moment current value I of hydrostatic sensor when observation sedimentationi, and
And the density of the liquid storage pot liquid under the conditions of Current Temperatures is recorded, it is denoted as liquid under the conditions of settlement observation test moment temperature
Density pi；
4) data according to recorded in step 2) and step 3), carry out calculating current settling amount Δ s:
Δ s=((I0-a1/ (a2-a1) × H-Δ H0C–ΔH0T)–((Ii-a1)/(a2-a1)×H–ΔHiC–ΔHiT)
Wherein, settling amount of the Δ s-- from initial value test moment to the settlement observation moment；
I0、Ii-- initial current value and settlement observation moment current value；
A1, a2-- hydrostatic sensor export calibration with current signal initial value and output calibration with current signal maximum value；
Full scale head value when H------- is demarcated；
ΔH0CThe moment is demarcated to the initial value test moment because of change of water level value caused by liquid pipe temperature change；
ΔH0TChange of water level value caused by the calibration moment changes to the initial value test moment because of fluid temperature；
ΔHiCMoment to the settlement observation moment is demarcated because of change of water level value caused by liquid pipe temperature change；
ΔHiTChange of water level value caused by calibration moment to the settlement observation moment changes because of fluid temperature.
A specific settlement measurement process as above-mentioned settlement gauge is as follows:
1) factory calibration: the specific gravity of glycol water is related with temperature and concentration.Aforesaid liquid preferentially selects volume dense
The glycol water of degree 30%.According to related data, the specific gravity of the glycol water of volumetric concentration 30% is -10 DEG C~55
DEG C when specific gravity it is as follows:
| Temperature DEG C | -10 | -5 | 0 | 5 | 10 | 15 | 20 |
| Specific gravity kg/m3 | 1054.31 | 1053.11 | 1051.78 | 1050.33 | 1048.76 | 1047.07 | 1045.25 |
| Temperature DEG C | 25 | 30 | 35 | 40 | 45 | 50 | 55 |
| Specific gravity kg/m3 | 1043.32 | 1041.26 | 1039.08 | 1036.78 | 1034.36 | 1031.81 | 1029.15 |
The hydraulic sensing surface settlement meter full accuracy of the present embodiment can accomplish 1mm, using be should be according to specifically used
It is required that being demarcated.When factory calibration, hydrostatic sensor can be demarcated, entire settlement gauge can also be demarcated.
There are exact requirements for settlement observation, it should which entire settlement gauge is demarcated in selection.The present embodiment is to hydrostatic sensor
Calibration is carried out to be illustrated.
Use environment normality temperature regime is collected first, and the specific gravity of aforesaid liquid is investigated according to temperature；
Highest head value when secondly determining the work of hydraulic sensing surface settlement meter, under normal circumstances, head when installation
Value is highest, highest head value is determined as to the range maximum value of the hydrostatic sensor, i.e. full value P, full scale head value is
H；The minimum value of hydrostatic sensor is 0, i.e. zero.
Hydrostatic sensor is placed in progress pressure value calibration on pressure sensor calibrating frame, by pressure sensor calibrating frame pressure
Power is set as zero, and it is calibration initial value that hydrostatic sensor, which exports electric current, is set as 4ma, then by the pressure of pressure sensor calibrating frame
Value is adjusted to full value, and it is calibration maximum value that hydrostatic sensor, which exports electric current, is set as 20ma, completes hydraulic sensing to be arranged such
The zero and full value of device.The pressure of pressure sensor calibrating frame is arranged near the half of full value again, according to the pressure of setting
Transducer calibration frame pressure and corresponding output electric current, the excitation wires plate in hydrostatic sensor calculate non-linear value automatically.Extremely
This completes the calibration of hydrostatic sensor.
2) initial value is tested: after hydraulic sensing surface settlement meter is installed, needing that test in 30 minutes or more is waited to obtain
The current value of hydrostatic sensor is I0, pressure value PR 0, it is converted into initial water header value HR 0.The test of initial value is according to in-site installation feelings
Condition can average several times in conjunction with working condition measurement, or several days interior soil bodys hole to be drilled of observation are basicly stable rear determining.
3) when normal observation settles, the current flow of hydrostatic sensor settlement observation: is observed by above-mentioned signal cable 205
Value is Ii, pressure value PR i, it is converted into test head value HR i。
4) settling amount calculates: setting the actual head height at initial value test moment as H0, the practical water at settlement observation moment
Grease head highness is Hi, then settling amount Δ s=H0-Hi
Δ s=((I0-4)/16×H–ΔH0C–ΔH0T)–((Ii--4)/16×H–ΔHiC–ΔHiT) formula 1
Wherein:
Settling amount of the Δ s-- from initial value test moment to the settlement observation moment；
I0、Ii-- initial current value and settlement observation moment current value；
Full scale head value when H------- is demarcated；
ΔH0CThe moment is demarcated to the initial value measurement moment because of change of water level value caused by liquid pipe temperature change；
ΔH0TChange of water level value caused by the calibration moment changes to the initial value measurement moment because of fluid temperature；
ΔHiCMoment to the settlement observation moment is demarcated because of change of water level value caused by liquid pipe temperature change；
ΔHiTChange of water level value caused by calibration moment to the settlement observation moment changes because of fluid temperature；
The generally longitudinally linear expansion coefficient calculation formula of PE material conduit is that (L is duct length, Δ T to 0.07mmL Δ T
For temperature change), radial deformation can be ignored.Liquid pipe elongation with 10 meters of liquid pipe length computations, when change in temperature Δ T
For 0.7 Δ T.The use environment of general settlement gauge is below ground, and the temperature change in anniversary is usually no more than 10 DEG C, with 10 DEG C
For, the elongation of liquid pipe is in 7mm.Under above-mentioned sedimentation plate 100 and the immovable situation in 205 relative position of mounting seat, Yin Wen
The change of water level value that degree variation causes container material volume change to generate is Δ HC=7 × ay/ a, in the present embodiment, a=30
× 30/4 × 3.14, ay=10 × 10/4 × 3.14.ΔHC=7 × ay/ a=0.8mm.So temperature can be ignored in the present embodiment
Change of water level caused by liquid pipe deforms when degree variation.
Therefore the sedimentation value that formula 1 is expressed can be expressed as in practical application:
Δ s=((I0-4)/16×H–ΔH0T)–((Ii-4)/16×H–ΔHiT)
=(I0–Ii)/16×H–(ΔH0T–ΔHiT)
(ΔH0T–ΔHiT)=(G/ ρ-G/ ρ0)/a–(G/ρ–G/ρi)/a
=(G/ ρi–G/ρ0)/a=(1/ ρi–1/ρ0)·G/a
Wherein:
ρ0The density of the liquid under the conditions of moment temperature is tested for initial value；
ρiThe density of the liquid under the conditions of moment temperature is tested for settlement observation；
A is the sectional area that the liquid storage fills；
G is the filling amount of the hydrostatic sensor surface settlement meter.
Therefore from the settlement calculated value expression at initial value measurement moment to settlement observation moment are as follows:
Δ s=(I0–Ii)/16×H-(1/ρi–1/ρ0)·G/a
In conclusion hydraulic sensing surface settlement meter and settlement measurement method of the invention, using fluid pressure difference
As test physical quantity, settling amount of the expression sedimentation plate relative to reference for installation；Using liquid storage filling, drying tube, tracheae, liquid pipe and
Hydrostatic sensor is formed a confined space by pressure side and ventilation end, and whole system is isolated from the outside world, not by change of atmospheric pressure,
Temperature change influences, and improves the accuracy of settlement measurement；In addition, drilling can be used in hydraulic sensing surface settlement meter of the invention
Embedded, observation benchmark is arranged in soil layer depths, is not influenced by live reference point displacement；Adaptability of the present invention is very strong, Ke Yiying
It is more advantageous for various environment, especially adverse circumstances, such as reclaim fields from the sea, in the water conservancy projects relevant item such as marine fill
Surface settlement (sedimentation at the original mud face in seabed) observation.So the present invention effectively overcomes various shortcoming in the prior art
And has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (12)
1. a kind of hydraulic sensing surface settlement meter characterized by comprising sedimentation plate, the protective shell being connected with sedimentation plate are placed in
Mounting seat below protective shell, and it is placed in the drying tube from top to bottom set gradually in protective shell, fluid reservoir and hydraulic
Sensor is filled with dried medium in drying tube, is contained with liquid in fluid reservoir, the bottom of drying tube by connecting tube with it is described
The top of fluid reservoir is connected, and the top of drying tube is connected by tracheae with the ventilation end of the hydrostatic sensor, fluid reservoir
Bottom end being connected by pressure side by liquid pipe and the hydrostatic sensor, the hydrostatic sensor has to be connected with external equipment
Communication unit.
2. hydraulic sensing surface settlement meter according to claim 1, it is characterised in that: the protective shell is divided into protection
Shell, lower protective shell, are provided with pipe protection set between upper protective shell and lower protective shell, the drying tube and the fluid reservoir are placed in
In protective shell, the hydrostatic sensor is placed in the lower protective shell, and the liquid pipe, the tracheae are threaded through the pipe protection
In set.
3. hydraulic sensing surface settlement meter according to claim 2, it is characterised in that: filled with solid in the upper protective shell
The epoxy resin sealants of the fixed drying tube and the fluid reservoir.
4. hydraulic sensing surface settlement meter according to claim 2, it is characterised in that: filled with solid in the lower protective shell
The epoxy resin sealants of the fixed hydrostatic sensor.
5. hydraulic sensing surface settlement meter according to claim 1, it is characterised in that: the dried medium is silica dehydrator
Agent.
6. hydraulic sensing surface settlement meter according to claim 1, it is characterised in that: the liquid storage fills and the interior filling of liquid pipe
Glycol water, and the amount of solution in liquid storage filling is that liquid storage fills the 75%~90% of volume.
7. hydraulic sensing surface settlement meter according to claim 6, it is characterised in that: the drying tube and the tracheae
It is interior to be filled with natural air.
8. hydraulic sensing surface settlement meter according to claim 1, it is characterised in that: the hydrostatic sensor includes diffusion
Silicon pressure sensing element and constant current drive wiring board, the communication unit are signal cable, and signal cable is extended to by protective shell
It is stretched out in the sedimentation plate.
9. hydraulic sensing surface settlement meter according to claim 8, it is characterised in that: the communication unit exports RS485
Communication signal or 4-20ma current signal.
10. hydraulic sensing surface settlement meter according to claim 1, it is characterised in that: the hydrostatic sensor is placed in one
In stainless steel protection shell.
11. hydraulic sensing surface settlement meter according to claim 1, it is characterised in that: the ventilation of the hydrostatic sensor
Capillary made of an end piece copper of connection or nylon, capillary are connected by ferrule fitting with the tracheae.
12. a kind of settlement measurement method using the described in any item hydraulic sensing surface settlement meters of claim 1 to 11, special
Sign is: the settlement measurement method includes:
1) pressure value calibration is carried out to the hydrostatic sensor, it is calibration that when zero head, which adjusts the hydrostatic sensor output electric current,
Initial value a1；Full scale head value when calibration is denoted as H, adjusts hydrostatic sensor described in corresponding full scale head value and exports electric current
To demarcate maximum value a2, and record the density of the interior liquid of liquid storage filling under the conditions of Current Temperatures；The liquid is installed after calibration
Pressure sensing surface settlement meter, full scale head value refer to height distance of the sedimentation plate apart from the hydrostatic sensor after installation；
2) initial value is tested: test obtains the initial current value I of the hydrostatic sensor0, and record institute under the conditions of Current Temperatures
The density for stating liquid storage pot liquid is denoted as the density p of liquid under the conditions of initial value test moment temperature0；
3) settlement observation: test obtains the settlement observation moment current value I of hydrostatic sensor when observation sedimentationi, and record
The density of the liquid storage pot liquid under the conditions of Current Temperatures is denoted as the density of liquid under the conditions of settlement observation test moment temperature
ρi；
4) data according to recorded in step 2) and step 3), carry out calculating current settling amount Δ s:
Δ s=((I0-a1)/(a2-a1)×H–ΔH0C–ΔH0T)–((Ii-a1)/(a2-a1)×H–ΔHiC–ΔHiT)
Wherein, settling amount of the Δ s-- from initial value test moment to the settlement observation moment；
I0、Ii-- initial current value and settlement observation moment current value；
A1, a2-- hydrostatic sensor export calibration with current signal initial value and output calibration with current signal maximum value
Full scale head value when H------- is demarcated；
ΔH0CThe moment is demarcated to the initial value test moment because of change of water level value caused by the liquid pipe temperature change；
ΔH0TChange of water level value caused by the calibration moment changes to the initial value test moment because of fluid temperature；
ΔHiCMoment to the settlement observation moment is demarcated because of change of water level value caused by the liquid pipe temperature change；
ΔHiTChange of water level value caused by calibration moment to the settlement observation moment changes because of fluid temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710824274.6A CN109489626B (en) | 2017-09-13 | 2017-09-13 | Hydraulic sensing surface layer settlement meter and settlement measuring method |
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| CN110470273A (en) * | 2019-09-19 | 2019-11-19 | 河南理工大学 | A kind of back sinking measurement ball monitoring method based on pressure difference |
| CN112629491A (en) * | 2021-01-21 | 2021-04-09 | 中铁上海设计院集团有限公司 | Calculation method for monitoring elevation fluctuation of iron-involved vehicle in consideration of temperature error |
| US20220341735A1 (en) * | 2020-02-25 | 2022-10-27 | Ocean University Of China | In-situ observation system for bottom boundary layer over shallow-water cohesive seabed and arrangement method thereof |
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| CN109489626B (en) | 2021-11-02 |
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