CN102853812A - Angular-displacement underwater settlement gauge - Google Patents
Angular-displacement underwater settlement gauge Download PDFInfo
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- CN102853812A CN102853812A CN2012102399322A CN201210239932A CN102853812A CN 102853812 A CN102853812 A CN 102853812A CN 2012102399322 A CN2012102399322 A CN 2012102399322A CN 201210239932 A CN201210239932 A CN 201210239932A CN 102853812 A CN102853812 A CN 102853812A
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- piston
- angular displacement
- settlement
- settling amount
- transmission belt
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
An angular-displacement underwater settlement gauge comprises a piston-type displacement transmission device; a lower casing pipe and an upper casing pipe are disposed on the piston-type displacement transmission device; an extension rod is connected with the lower part of the piston-type displacement transmission device; the lower end of the extension rod is an anchoring point; a measuring box is connected with above the piston-type displacement transmission device; a settlement amount electric measurement device and an A/D switch device are disposed in the measuring box; a steel pipe is connected with the upper end of the measuring box; a settlement broad is connected with the top end of the steel pipe; a transmission belt is disposed in the piston-type displacement transmission device; the settlement amount electric measurement device is connected with the upper end of the transmission belt; the settlement amount electric measurement device is connected with the A/D switch device; the A/D switch device is connected with a monitoring instrument through cables, wherein the monitoring instrument is disposed above far away from the settlement gauge. The settlement gauge has a simple structure, and can convert linear displacement into angular displacement to improve measurement precision and accuracy. The angular-displacement underwater settlement gauge has wide application scope, high monitoring precision and sensitivity, strong interference immunity for transmission signals, and high stability, can realize real-time visual display of the settlement values, and is simple in installation, and low in cost.
Description
Technical field
The invention belongs to civil engineering work quality monitoring instrument, particularly for the sedimentometer of soft foundation settling volume prediction long term monitoring under water.
Background technology
In port construction, usually use the settling amount of vibrating wire settlement sensor monitoring soft soil base.Utilization to vibrating wire settlement sensor still rests at present the vibration frequency of manual record string wire and calculates the solum settlement amount of surveying through the artificial later stage.Vibrating wire settlement sensor have when being used for the monitoring settling amount that failure rate is high, signal is subject to electromagnetic interference (EMI) when cable transmit and affect that measurement result, monitoring accuracy are low, the problem such as poor stability, cost height, data acquisition are not directly perceived.
Summary of the invention
The object of the present invention is to provide a kind of angular displacement type sedimentometer under water, both can be used for measuring for a long time the settling amount of soft soil foundation under water, also can measure the settling amount of land soft soil foundation.Angular displacement type under water sedimentometer is used face width, monitoring accuracy and highly sensitive, and signal transmission strong interference immunity, stability are high, settling amount numerical value can be shown in real time intuitively, and simple installation, use cost are cheap.
Technical scheme of the present invention is:
A kind of angular displacement type is sedimentometer under water, it is characterized in that: a piston type shift gear is arranged, the piston type shift gear has lower parts casing pipe and upper sleeve, piston type shift gear below connects extension rod, the extension rod lower end is anchor point, and piston type shift gear top is connected with measuring box, and settling amount electric probe device and A/D conversion equipment are arranged in the measuring box, measuring box upper end joint steel pipe, the steel pipe top connects settlement plate; The transmission belt is arranged in the piston type shift gear, and transmission belt upper end connects the settling amount electric probe device, and the settling amount electric probe device connects the A/D conversion equipment, and the A/D conversion equipment connects at a distance monitoring instrument of top by cable.
The lower end of transmission belt is fixed on the bottom of lower parts casing pipe.
Lower port in upper sleeve has deflection sheave, and the top that deflection sheave is fixed on lower parts casing pipe is walked around in the lower end of transmission belt.
The settling amount electric probe device has angular displacement sensor, angular displacement sensor is connected on the cylindrical winding wheel shaft by coupling shaft, transmission belt upper end is fixed on the cylindrical reel, and there is the vortex ring spring on transmission belt top in cylindrical reel inside on cylindrical reel.
Characteristic advantage of the present invention:
This angular displacement type under water sedimentometer is simple in structure, converts displacement of the lines to angular displacement and improves measuring accuracy and accuracy.Angular displacement type under water sedimentometer is used face width, both can be used for measuring for a long time the settling amount of soft soil foundation under water, also can measure the settling amount of land soft soil foundation.Monitoring accuracy and highly sensitive, signal transmission strong interference immunity, stability are high, settling amount numerical value can be shown in real time intuitively, and simple installation, use cost are cheap.
Description of drawings
Fig. 1 is angular displacement type sedimentometer structure one under water
Fig. 2 is angular displacement type sedimentometer structure two under water
Fig. 3 is settling amount electric probe device front view
Fig. 4 is settling amount electric probe device left view
Among the figure: 1 monitoring instrument, 2 signal cables, 3 sea level, 4 settlement plates, 5 steel pipes, 6A/D conversion, 7 settling amount electric probe devices, 8 transmission belts, the upper sleeve of 9 piston type shift gears, the lower parts casing pipe of 10 piston type shift gears, 11 extension rods, 12 anchor points, 13 do not occur that the sedimentation rock stratum is underground, 14 deflection sheavies, 15 angular displacement sensors, 16 cylindrical reels, 17 vortex ring springs, 18 coupling shafts, 19 measuring boxes.
Embodiment
A kind of angular displacement type sedimentometer under water as shown in Figure 1, 2, a piston type shift gear is arranged, the piston type shift gear has lower parts casing pipe and upper sleeve, piston type shift gear below connects extension rod, the extension rod lower end is anchor point, and piston type shift gear top is connected with measuring box, and settling amount electric probe device and A/D conversion equipment are arranged in the measuring box, measuring box upper end joint steel pipe, the steel pipe top connects settlement plate; The transmission belt is arranged in the piston type shift gear, and transmission belt upper end connects the settling amount electric probe device, and the settling amount electric probe device connects the A/D conversion equipment, and the A/D conversion equipment connects at a distance monitoring instrument of top by cable.
Lower port in upper sleeve has deflection sheave as shown in Figure 1, and the top that deflection sheave is fixed on lower parts casing pipe is walked around in the lower end of transmission belt.
The lower end of transmission belt is fixed on the bottom of lower parts casing pipe as shown in Figure 2.
The settling amount electric probe device has angular displacement sensor shown in Fig. 3,4, angular displacement sensor is connected on the cylindrical winding wheel shaft by coupling shaft, transmission belt upper end is fixed on the cylindrical reel, there is the vortex ring spring on transmission belt top in cylindrical reel inside on cylindrical reel.
This angular displacement type is sedimentometer under water, and its structure further specifies:
" sedimentometer bottom extension rod " is fixed in the underground anchor point that the sedimentation rock stratum does not occur, its upper end connects " piston type shift gear ", " settling amount electric probe device ", " settlement plate " of sedimentometer successively, and be connected to " monitoring instrument " by the signal cable of drawing in " settling amount electric probe device ", bury the settling amount that occurs in during this period of time up to this moment underground from sedimentometer thereby can intuitively read accurately in real time current settlement plate place soil layer.Each device characteristic is as follows:
One, " sedimentometer bottom extension rod "
The underground anchor point that the sedimentation rock stratum does not occur is fixed in " sedimentometer bottom extension rod " lower end.The extension rod upper end is fixed with " piston type shift gear " lower parts casing pipe lower end.The extension rod material is firm deformable material such as the metal etc. of being difficult for.So that sedimentation does not occur in lower parts casing pipe, thus the reference point of measuring as settling amount.
Two, " piston type shift gear " comprises following two mechanisms:
1, piston mechanism
Such as Fig. 1 and Fig. 2, piston is comprised of upper sleeve and lower parts casing pipe, and two sleeve pipe joining places have anti-piston to deviate from mechanism and cross spacing mechanism.Upper sleeve and " settling amount electric probe device " place can and " settlement plate " are connected to one, thereby ensure that the stroke that vertically relatively moves in the section between piston two sleeve pipes at a time namely equals the settling amount of the soil layer of surveying in this time period.Thickness and flowable waterproof packing material are filled up in the internal piston space, and the water resistance of sedimentometer is reliable during with the guarantee piston movement.Sleeve pipe is firm deformable material such as the metal etc. of being difficult for up and down.
2, the displacement transmission mechanism in the piston
Such as Fig. 1, Fig. 3, shown in Figure 4, the transmission " belt " of transmitting displacement is arranged in the piston sleeve.The upper end of " belt " is that the b end is fixed on the side of " cylindrical reel " in " settling amount electric probe device "." belt " effect is with piston two sleeve pipes b end that the real-time equivalent of stroke is converted into " belt " in this time period displacement of the lines amount that rotate in the axle center of " cylindrical reel " in " settling amount electric probe device " that vertically relatively moves in the section between at a time, namely equals the settling amount of the soil layer of surveying in this time period.That transmission " belt " characteristic is is flexible, it is flexible to be difficult for, easy fracture not, all can such as materials such as wire rope, elongated tagger, chain, cortex travelling belts.Two kinds of mounting structures of transmission in piston " belt " and the principle of work of transmission " belt " are as follows:
Structure (1): piston inner structure such as Fig. 1, Fig. 3, shown in Figure 4, a deflection sheave is equipped with on the following top of upper sleeve.The deflection sheave rotation axis is fixed on the upper sleeve bottom, and pulley is used for transmission " belt " is turned to." belt " upper end b is connected with " cylindrical reel " side in " settling amount electric probe device ", and " belt " twines multi-turn side by side on " cylindrical reel " side, and twining the number of turns can revise according to the range needs." belt " other end a passes through after " deflection sheave " and the bottom cannula tip is fixed.
When settlement plate at a time between in the section with survey soil layer sinking, then piston compression." belt " winding number of turns on " cylindrical reel " reduces, the displacement of the lines amount that the b end of " belt " rotates around the axle center of " cylindrical reel " equals the decrement of this time period inner carrier, also equal the settling amount of settlement plate in this time period, namely realized displacement transmitted function.
Otherwise when settlement plate at a time between the section in rise with the survey soil layer, then piston elongation, " belt " winding number of turns on " cylindrical reel " increases, the b of " belt " end equals the elongation of this time period inner carrier around the counter-rotational displacement of the lines amount of axle center institute of " cylindrical reel ", also equals the ascending amount of interior settlement plate of this time period.
Structure (2): piston inner structure such as Fig. 2, Fig. 3, shown in Figure 4, " belt " upper end b is connected with " cylindrical reel " side in " settling amount electric probe device ", " belt " twines multi-turn side by side on " cylindrical reel " side, twining the number of turns can revise according to the range needs." belt " other end a directly and the bottom casing shoe fix.
When settlement plate at a time between in the section with survey soil layer sinking, then piston compression." belt " winding number of turns on " cylindrical reel " increases, and the displacement of the lines amount that the b end of " belt " rotates around the axle center of " cylindrical reel " equals the decrement of this time period inner carrier, also equals the settling amount of settlement plate in this time period.
Otherwise when settlement plate at a time between the section in rise with the survey soil layer, then piston elongation, " belt " winding number of turns on " cylindrical reel " reduces, the b of " belt " end equals the elongation of this time period inner carrier around the counter-rotational displacement of the lines amount of axle center institute of " cylindrical reel ", also equals the ascending amount of interior settlement plate of this time period.
Three, " settling amount electric probe device " is fixed in the firm waterproof sealing can in " piston type shift gear " top, and draws signal cable and be connected to " monitoring instrument ", and there is the waterproof wiring terminal sealing cable and sedimentometer shell junction.Signal wire and supply lines are arranged, so that " monitoring instrument " interior power supply can be " settling amount electric probe device " and powers when measuring in the cable." settling amount electric probe device " inside comprises following two mechanisms:
1, displacement drive mechanism
Such as Fig. 3, Fig. 4, " belt " b end is connected with " cylindrical reel " side in " settling amount electric probe device "." belt " twines multi-turn (twining the number of turns can revise according to the range needs) side by side on " cylindrical reel " side.The vortex ring spring is arranged so that " belt " is in tensioned state all the time in " cylindrical reel ".There is fine thread " cylindrical reel " side, and belt crouches in thread groove, so that belt is twining when emitting or reclaiming all the time side by side from " cylindrical reel ".When belt a end pulling force reduces, so that belt and flowing back to twines on " cylindrical reel " side.The axle center of " cylindrical reel " interfixes with the turning axle of " angular displacement sensor " and is coaxial.Therefore the angular displacement when " cylindrical reel " rotates equates and synchronously increase and decrease with the angular displacement that " angular displacement sensor " turning axle rotates.
When settlement plate at a time between in the section with survey soil layer sinking (or rising), the displacement of the lines amount that the b end of " belt " rotates around its axle center in " cylindrical reel " side is that the settling amount (or ascending amount) of the soil layer of surveying in this time period is L, the girth of " cylindrical reel " is C, and the anglec of rotation that " cylindrical reel " rotates with " belt " in this time period is that this time period interior angle displacement increment that " angular displacement sensor " surveyed is ⊿ θ (unit is radian).Then:
2, displacement is converted into digital electric signal mechanism
When settlement plate at a time between in the section during with surveys soil layer sinking (or rising), " angular displacement sensor " can record the interior angular displacement amount of increasing ⊿ θ of this time period.The type of " angular displacement sensor " can be used: resistance-type rotary encoder, absolute type photoelectric rotary coder, absolute type electromagnetic rotary scrambler.
Method (1): " angular displacement sensor " uses the resistance-type rotary encoder, and the simulating signal value of scrambler output changes into the digital signal that value is R through A/D converter (analog to digital converter).The angle θ that value R and scrambler record is linear, therefore at a time between in the section amount of the increasing ⊿ R of R and the pass between the angular displacement amount of the increasing ⊿ θ that scrambler records be: ⊿ θ=k ⊿ R, k is that the fixed conversion constant can be tried to achieve according to the characterisitic parameter of scrambler and A/D converter, so k is known constant.
Then:
The simulating signal of resistance-type rotary encoder output changes digital signal into through A/D converter, and this digital signal is imported value R into " monitoring instrument " from sedimentometer by signal cable.Thereby ensured that in the transmission of long line signal can be owing to decay affect the measurement precision, and measuring accuracy is not subject to the external electromagnetic signal and disturbs.
Mode (2) and mode (3):
" angular displacement sensor " uses absolute type photoelectric rotary coder or absolute type electromagnetic rotary scrambler, scrambler all can directly be exported the digital signal that value is R, the angle θ that value R and scrambler record is linear, therefore both at a time between a increment relation in the section be: ⊿ θ=k ⊿ R, k is the fixed conversion constant, manufacturer provides by scrambler, is known constant.
Then:
This digital signal is imported value R into " monitoring instrument " from sedimentometer by signal cable.Thereby ensured that signal can be owing to decay affects the measurement precision in long line transmission.
Four, " settlement plate "
Settlement plate is fixed in tested soil layer, and " settling amount electric probe device " received by a firm steel pipe connecting in the settlement plate below, thereby the settling amount of settlement plate place soil layer is delivered to " piston type shift gear ".Five, " monitoring instrument " comprises following two mechanisms
1, the processing of signal and computing circuit
" monitoring instrument " receives the real time digital signal of being exported by sedimentometer from cable, and output value R is to single-chip microcomputer after the signal processing circuit of this digital signal in " monitoring instrument ".The value R ' of the digital signal that settling amount monitoring start time point is surveyed has been recorded in the internal storage of monitoring instrument, and the numerical value of surveying when R ' adopts sedimentometer just to bury underground usually also can be selected the measured value of required start time point voluntarily.In " monitoring instrument " by the Single Chip Microcomputer (SCM) program computing so that the digital signal value of single-chip microcomputer output be from settling amount monitoring start time point to the tested solum settlement amount L in during this period of time between this monitoring time point.The reduction formula that single-chip microcomputer moves is:
2, display circuit
The digital signal value of the single-chip microcomputer output in " processing of signal and computing circuit " is settling amount L.After this digital signal is processed by display drive circuit, so that settling amount L is presented on the display screen of " monitoring instrument " in real time.
The using method of achievement of the present invention is: as shown in Figure 1 and Figure 2, " sedimentometer bottom extension rod " is fixed in the underground anchor point that the sedimentation rock stratum does not occur, its upper end is connected with " piston type shift gear ", " settling amount electric probe device ", " settlement plate " of sedimentometer in turn, and settlement plate is fixed in tested soil layer.Sedimentometer is connected to " monitoring instrument " by the signal cable of drawing in " settling amount electric probe device ", thereby can directly read accurately in real time the settling amount of current settlement plate place soil layer.
Tested solum settlement amount is converted into the measured angular displacement in sedimentometer inside " angular displacement sensor " by " the piston type shift gear " in the sedimentometer.This angular displacement and tested solum settlement amount are linear.This angular displacement is converted into digital signal and sends monitoring instrument to.Monitoring instrument can be by drawing the settling amount of tested soil layer after this angular displacement calculation process, and can be by the real-time settling amount that shows tested soil layer directly perceived of the display screen on the monitoring instrument.The output signal of sedimentometer is digital signal, and this signal is that " angular displacement sensor " detected angular displacement is transformed in the sedimentometer.This digital signal reaches monitoring instrument through cable, so measuring accuracy is not vulnerable to the impact of length of cable and outside electromagnetic interference.The wide range of sedimentometer and high sensitivity, range can reach more than 5 meters, sensitivity can reach 0.05 millimeter.
Claims (4)
1. angular displacement type sedimentometer under water, it is characterized in that: a piston type shift gear is arranged, the piston type shift gear has lower parts casing pipe and upper sleeve, piston type shift gear below connects extension rod, the extension rod lower end is anchor point, and piston type shift gear top is connected with measuring box, and settling amount electric probe device and A/D conversion equipment are arranged in the measuring box, measuring box upper end joint steel pipe, the steel pipe top connects settlement plate; Piston type displacement transmission load has the transmission belt in connecing and putting, and transmission belt upper end connects the settling amount electric probe device, and the settling amount electric probe device connects the A/D conversion equipment, and the A/D conversion equipment connects at a distance monitoring instrument of top by cable.
2. according to claims 1 described angular displacement type sedimentometer under water, it is characterized in that: the lower end of transmission belt is fixed on the bottom of lower parts casing pipe.
3. according to claims 1 described angular displacement type sedimentometer under water, it is characterized in that: the lower port in upper sleeve has deflection sheave, and the top that deflection sheave is fixed on lower parts casing pipe is walked around in the lower end of transmission belt.
4. according to claims 1 described angular displacement type sedimentometer under water, it is characterized in that: the settling amount electric probe device has angular displacement sensor, angular displacement sensor is connected on the cylindrical winding wheel shaft by coupling shaft, transmission belt upper end is fixed on the cylindrical reel, there is the vortex ring spring on transmission belt top in cylindrical reel inside on cylindrical reel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210239932.2A CN102853812B (en) | 2012-07-12 | 2012-07-12 | Angular-displacement underwater settlement gauge |
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| CN201210239932.2A CN102853812B (en) | 2012-07-12 | 2012-07-12 | Angular-displacement underwater settlement gauge |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196421A (en) * | 2013-01-22 | 2013-07-10 | 中交天津港湾工程研究院有限公司 | Automatic inspection type layered settlement instrument |
| CN103938662A (en) * | 2014-04-30 | 2014-07-23 | 中交天津港湾工程研究院有限公司 | Underwater load test system |
| CN108413928A (en) * | 2015-08-21 | 2018-08-17 | 中交天津港湾工程研究院有限公司 | A kind of soil body delaminating deposition amount monitoring system |
| CN112504220A (en) * | 2020-11-06 | 2021-03-16 | 中交第四航务工程勘察设计院有限公司 | Telescopic tubular automatic monitoring device and method for surface settlement |
| CN112945426A (en) * | 2021-01-29 | 2021-06-11 | 西南石油大学 | Vibrating wire sensor and stress displacement testing method |
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| JPH11153431A (en) * | 1997-11-18 | 1999-06-08 | Asahi Sangyo Kk | Uneven settlement monitoring device for timbering |
| KR20030039674A (en) * | 2001-11-14 | 2003-05-22 | 주식회사 스마텍지앤씨 | Vertical settlement measuring method and apparatus thereof on soft land |
| CN2750288Y (en) * | 2004-07-27 | 2006-01-04 | 卢新民 | Electrical logging rod type settlement gauge |
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2012
- 2012-07-12 CN CN201210239932.2A patent/CN102853812B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11153431A (en) * | 1997-11-18 | 1999-06-08 | Asahi Sangyo Kk | Uneven settlement monitoring device for timbering |
| KR20030039674A (en) * | 2001-11-14 | 2003-05-22 | 주식회사 스마텍지앤씨 | Vertical settlement measuring method and apparatus thereof on soft land |
| CN2750288Y (en) * | 2004-07-27 | 2006-01-04 | 卢新民 | Electrical logging rod type settlement gauge |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196421A (en) * | 2013-01-22 | 2013-07-10 | 中交天津港湾工程研究院有限公司 | Automatic inspection type layered settlement instrument |
| CN103196421B (en) * | 2013-01-22 | 2015-03-18 | 中交天津港湾工程研究院有限公司 | Automatic inspection type layered settlement instrument |
| CN103938662A (en) * | 2014-04-30 | 2014-07-23 | 中交天津港湾工程研究院有限公司 | Underwater load test system |
| CN103938662B (en) * | 2014-04-30 | 2016-09-14 | 中交天津港湾工程研究院有限公司 | Underwater loading pilot system |
| CN108413928A (en) * | 2015-08-21 | 2018-08-17 | 中交天津港湾工程研究院有限公司 | A kind of soil body delaminating deposition amount monitoring system |
| CN108981654A (en) * | 2015-08-21 | 2018-12-11 | 中交天津港湾工程研究院有限公司 | A kind of application method of firm embedded type sedimentation ring |
| CN108413928B (en) * | 2015-08-21 | 2020-07-28 | 中交天津港湾工程研究院有限公司 | Soil body layering settlement monitoring system |
| CN112504220A (en) * | 2020-11-06 | 2021-03-16 | 中交第四航务工程勘察设计院有限公司 | Telescopic tubular automatic monitoring device and method for surface settlement |
| CN112945426A (en) * | 2021-01-29 | 2021-06-11 | 西南石油大学 | Vibrating wire sensor and stress displacement testing method |
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