CN105403359A - Simple calibrating device of mini-sized small measuring range pore water pressure sensor in aqueous medium - Google Patents
Simple calibrating device of mini-sized small measuring range pore water pressure sensor in aqueous medium Download PDFInfo
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- CN105403359A CN105403359A CN201510890719.1A CN201510890719A CN105403359A CN 105403359 A CN105403359 A CN 105403359A CN 201510890719 A CN201510890719 A CN 201510890719A CN 105403359 A CN105403359 A CN 105403359A
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- water pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
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Abstract
The invention discloses a simple calibrating device of a mini-sized small measuring range pore water pressure sensor in aqueous medium belonging to the geotechnical engineering pore water pressure device related field. The device comprises a pore water pressure sensor fixing device, an organic glass cylindrical device, and a device pedestal. The pore water pressure sensor fixing device is formed by a rigid long rod and a disc, which are vertically fixedly connected together. The rigid long rod is used for fixing the lead of the pore water pressure sensor, and the disc is used for fixing the pore water pressure sensor. The organic glass cylindrical device is the main body device of the calibrating pore water pressure sensor, and the bottom part valve can be used to control the elevating of the water level in the cylinder, and then the loading and unloading of the pore water pressure sensor can be realized. The water level value can be read directly by the scale lines on the cylinder, and the value of the corresponding water pressure applied on the pore water pressure sensor can be obtained. The device provided by the invention is advantageous in that the structure is simple, the operation is facilitated, and the calibrating problem of the mini-sized small measuring range pore water pressure sensors having various sizes in the aqueous medium can be solved.
Description
Technical field
The present invention relates to a kind of sensor calibration apparatus, particularly relate to miniature small-range pore water pressure sensor simple calibrating device in aqueous medium, can be used for the demarcation of the pore water pressure sensor measuring pore water pressure force value in indoor model test.
Background technology
In the Geotechnical Engineering field of underground water; particularly near a river, in the base pit engineering of strand, submerged tunnel engineering and foundation treatment engineering; Pore Water Pressure in soil is everybody question of common concern always; therefore a large amount of indoor model test relevant to above Practical Project all can relate to test and the research of pore water pressure size and distribution, often can relate to the problem of calibrating of pore water pressure sensor in experimental study process.Pore water pressure sensor is at the employing gas mark often that dispatches from the factory, all kinds of Geotechnical Engineering is tested pore water pressure sensor used and is usually also adopted gas mark, but because pore water pressure sensor directly contacts with aqueous medium in actual monitoring process, require that it has good sealing and insulativity in aqueous medium environment, gas calibration method can not realize, therefore is necessary to carry out rating test in aqueous medium environment.In pore water pressure sensor water gauge test in the past, realize pressurizeing by the method for pressure apparatus to pressure cylinder injection pressure water, singularity due to pressure apparatus pressurization causes demarcation initial pressure point and demarcation spacing all can exceed the full test scope of small-range pore water pressure sensor, the method is only applicable to the demarcation of wide range pore water pressure sensor, cannot realize the accurate demarcation of small-range pore water pressure sensor.Therefore comparatively easy method calibrating miniature small-range pore water pressure sensor is utilized to be problem in the urgent need to address.
A large amount of test result shows that the permeable stone surface location of small-range pore water pressure sensor exists certain impact to pore water pressure measured value, but in gas mark in the past or water gauge test, pore water pressure sensor is usually placed on bottom caliberating device by random, causes the permeable stone surface of pore water pressure sensor to tilt arbitrarily.In fact in the calibration process of small-range pore water pressure sensor, should ensure that permeable stone surface flushes with measurement water pressure face, in addition for adapting to the pore water pressure sensor of different size, need to arrange specific pore water pressure sensor stationary installation to meet these demands.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides miniature small-range pore water pressure sensor simple calibrating device in aqueous medium, solve the fixation problem of the miniature small-range pore water pressure sensor of different size in calibration process, obtain the scaling method that in aqueous medium, miniature small-range pore water pressure sensor is comparatively easy.
The technical solution adopted for the present invention to solve the technical problems is: miniature small-range pore water pressure sensor simple calibrating device in a kind of aqueous medium, comprises pore water pressure sensor stationary installation, plexiglass cylinder device and device pedestal;
Described cylinder unit is made up of plexiglass cylinder, rule and bottom valve, described device pedestal horizontal positioned, and plexiglass cylinder is vertically fixed on device pedestal, is tightly connected with device pedestal, ensures that the water in plexiglass cylinder can not ooze out.The sidewall of plexiglass cylinder is provided with rule, bottom is provided with valve, valve is for controlling the lifting of water level in plexiglass cylinder, realize the compression and decompression to pore water pressure sensor, transparent plexiglass cylinder can direct observed stage situation of change, directly can read water level value and then put on the hydraulic pressure force value of pore water pressure sensor accordingly by scale mark;
Pore water pressure sensor stationary installation is placed on the device pedestal in plexiglass cylinder; Described pore water pressure sensor stationary installation is made up of rigidity stock, the disk fixing pore water pressure sensor and disk bottom cushion block;
Rigidity stock is used for the wire of fixing pore water pressure sensor; Described disk is bonded by middle polypropylene plectane and upper and lower two pieces of rubber circular plates, and the effect of polypropylene plectane ensures pore water pressure sensor straight down, and the effect of rubber circular plate is fixed by pore water pressure sensor; Described disc centre has threaded hole, surrounding has the circular hole of some fixing pore water pressure sensors, circular hole quantity and size are determined by the quantity of pore water pressure sensor and size, can change according to actual needs, realize varying number, the miniature small-range pore water pressure sensor of different size fixing; Rigidity stock is fixedly connected with the threaded hole of disc centre is vertical by bottom thread;
Disk bottom cushion block is fixed on lower disk surface, for the built on stilts pore water pressure sensor be fixed on disk, ensure that pore water pressure sensor fully contacts with aqueous medium, make the lower disk surface of fixing pore water pressure sensor flush with scale mark zero line simultaneously.
Further, described pore water pressure sensor stationary installation is not fixedly connected with device pedestal.
Further, described rigidity stock adopts polyamide fibre bar; Cushion block adopt vulcanie make, its thickness and scale zero line in the same size to the distance of device pedestal.
Further, the scale zero line of described plexiglass cylinder does not overlap with bottom of cylinder; Valve is copper core valve.
Further, described device pedestal is organic glass base.
Compared with prior art, the invention has the beneficial effects as follows:
1, adopt the loading and unloading of method realization to pore water pressure sensor of controlling water level in the present invention, make to load the stated accuracy requirement that spacing can meet small-range pore water pressure sensor.
2, for the water gauge of miniature small-range pore water pressure sensor, the pore water pressure sensor fixed form adopted in the present invention is: the circular hole of multiple fixing pore water pressure sensor reserved by the disk of fixing pore water pressure sensor by boring method, wherein, circular hole on polypropylene plectane and rubber circular plate is respectively used to ensure that pore water pressure sensor straight down and fix pore water pressure sensor, and is fixed on rigidity stock by the wire of pore water pressure sensor with Plastic Bandage.
3, as improvement of the present invention, for adapting to the size of different aperture water pressure sensor, this device can change the fixed disc being applicable to varying number, the miniature small-range pore water pressure sensor of different size, can realize multiple pore water pressure sensor and demarcate simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of miniature small-range pore water pressure sensor simple calibrating device in aqueous medium;
Fig. 2 is each component structural schematic diagram of miniature small-range pore water pressure sensor stationary installation, and (a) is disk vertical view, and (b) is rigidity stock schematic diagram, and (c) is disk side view;
Wherein: the disk 1-2 of pore water pressure sensor stationary installation 1, rigidity stock 1-1, rigidity stock bottom thread 1-1-1, fixing pore water pressure sensor, polypropylene plectane 1-2-1, rubber circular plate 1-2-2, the threaded hole 1-2-3 connecting rigidity stock, circular hole 1-2-4, the disk bottom cushion block 1-3 of fixing pore water pressure sensor, plexiglass cylinder device 2, plexiglass cylinder 2-1, rule 2-2, bottom valve 2-3, device pedestal 3.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, in a kind of aqueous medium provided by the invention, miniature small-range pore water pressure sensor simple calibrating device, comprises pore water pressure sensor stationary installation 1, plexiglass cylinder device 2 and device pedestal 3; Described cylinder unit 2 is made up of plexiglass cylinder 2-1, rule 2-2 and bottom valve 2-3, described device pedestal 3 horizontal positioned, plexiglass cylinder 2-1 is vertically fixed on device pedestal 3, be tightly connected with device pedestal 3, ensure that the water in plexiglass cylinder 2-1 can not ooze out, described device pedestal 3 can adopt organic glass base.The sidewall of plexiglass cylinder 2-1 is provided with rule 2-2, bottom is provided with valve 2-3, valve 2-3 can adopt copper core valve, for controlling the lifting of water level in plexiglass cylinder 2-1, realize the compression and decompression to pore water pressure sensor, transparent plexiglass cylinder 2-1 can direct observed stage situation of change, directly can read water level value and then put on the hydraulic pressure force value of pore water pressure sensor accordingly by scale mark 2-2.
Pore water pressure sensor stationary installation 1 is placed on the device pedestal 3 in plexiglass cylinder 2-1, and pore water pressure sensor stationary installation 1 is not fixedly connected with device pedestal 3; Described pore water pressure sensor stationary installation 1 is made up of rigidity stock 1-1, the disk 1-2 fixing pore water pressure sensor and disk bottom cushion block 1-3; Rigidity stock 1-1 can adopt polyamide fibre bar, for the wire of fixing pore water pressure sensor; As shown in Figure 2 c, described disk 1-2 is bonded by middle polypropylene plectane 1-2-1 and upper and lower two pieces of rubber circular plate 1-2-2, the effect of polypropylene plectane 1-2-1 ensures pore water pressure sensor straight down, and the effect of rubber circular plate 1-2-2 is fixed by pore water pressure sensor; As shown in Figure 2 a, disk 1-2 center has threaded hole 1-2-3, surrounding has the circular hole 1-2-4 of some fixing pore water pressure sensors, circular hole quantity and size are determined by the quantity of pore water pressure sensor and size, can change according to actual needs, realize varying number, the miniature small-range pore water pressure sensor of different size fixing; As shown in Figure 2 b, rigidity stock 1-1 is fixedly connected with the threaded hole 1-2-3 at disk 1-2 center is vertical by bottom thread 1-1-1; Disk bottom cushion block 1-3 is fixed on disk 1-2 lower surface, for the built on stilts pore water pressure sensor be fixed on disk, ensure that pore water pressure sensor fully contacts with aqueous medium, make the disk 1-2 lower surface of fixing pore water pressure sensor flush with scale mark zero line simultaneously; Disk 1-2 and bottom gasket 1-3 seccotine are adhesively fixed.
Described polypropylene plectane 1-2-1 should have certain rigidity and ensure pore water pressure sensor straight down, and rubber circular plate 1-2-2 selects elastomeric vulcanie to make and pore water pressure sensor can be fixed.
The length of described rigid polyamide fiber rod 1-1 should leave more than needed, is convenient to pore water pressure sensor stationary installation 1 in the location of plexiglass cylinder device 2 and placement.Described disk bottom cushion block 1-3 can adopt vulcanie to make, should ensure that the lower surface of the disk 1-2 of fixing pore water pressure sensor flushes with liquid level in cylinder, its thickness should equal the distance of scale zero line to plexiglass cylinder bottom of device, the lower disk surface of fixing pore water pressure sensor is flushed with scale mark zero line, ensures the loading and unloading precision of pore water pressure sensor.Described device pedestal 3 should ensure that whole plexiglass cylinder device 2 can vertically leave standstill, and ensures that in plexiglass cylinder device 2 bottom surface and cylinder, liquid level flushes simultaneously.
The course of work of the present invention is as follows: be first fixed in the circular hole 1-2-4 of disk 1-2 by miniature pore water pressure sensor, ensure that pore water pressure sensor permeable stone flushes with disk 1-2 lower surface, pore water pressure sensor wire Plastic Bandage is fixed on rigidity stock 1-1, wire is drawn from rigidity stock 1-1 top, is connected on external data collecting instrument and power supply; The stationary installation 1 fixing pore water pressure sensor is vertically placed in plexiglass cylinder device 2, open bottom valve 2-3 and inject air free water to plexiglass cylinder device 2, under pore water pressure sensor being immersed in the air free water liquid level of plexiglass cylinder device 2, leave standstill more than 24h; Carry out pore water pressure sensor and load demarcation, control bottom valve 2-3 and inject air free water to plexiglass cylinder device 2 gradually, realize loading to increase the pressure acting on pore water pressure sensor permeable stone surface, observe the reading of rule 2-2, if reach certain grade of load (reading of rule 2-2 is converted to applied load), close bottom valve 2-3 and stop water filling, utilize external data collecting instrument to read the output data of pore water pressure sensor 5 after stablizing 10s, multistage loadings is until reach the ratings (range) of pore water pressure sensor; Carry out pore water pressure sensor Unloading Calibration, control bottom valve 2-3 gradually draining acts on the pressure on pore water pressure sensor permeable stone surface with reduction, observe the reading of rule 2-2, if reduce to certain grade of load, close bottom valve 2-3 and stop draining, utilize external data collecting instrument to read the output data of pore water pressure sensor after stablizing 10s, unloading is until unload completely step by step; That the output data of the pore water pressure sensor under the different loads of collection gained are depicted aqueous medium Pore Pressure sensor adds Unloading Calibration curve.
Claims (5)
1. a miniature small-range pore water pressure sensor simple calibrating device in aqueous medium, is characterized in that: comprise pore water pressure sensor stationary installation (1), plexiglass cylinder device (2) and device pedestal (3);
Described cylinder unit (2) is made up of plexiglass cylinder (2-1), rule (2-2) and bottom valve (2-3), described device pedestal (3) horizontal positioned, plexiglass cylinder (2-1) is vertically fixed on device pedestal (3), is tightly connected with device pedestal (3).The sidewall of plexiglass cylinder (2-1) is provided with rule (2-2), bottom is provided with valve (2-3), valve (2-3), for controlling the lifting of plexiglass cylinder (2-1) interior water level, directly can read water level value by scale mark (2-2) and then be put on the hydraulic pressure force value of pore water pressure sensor accordingly; Pore water pressure sensor stationary installation (1) is placed on the device pedestal (3) in plexiglass cylinder (2-1); Described pore water pressure sensor stationary installation (1) is made up of rigidity stock (1-1), the disk (1-2) fixing pore water pressure sensor and disk bottom cushion block (1-3); Rigidity stock (1-1) is for the wire of fixing pore water pressure sensor; Described disk (1-2) is bonded by middle polypropylene plectane (1-2-1) and upper and lower two pieces of rubber circular plates (1-2-2), disk (1-2) center has threaded hole (1-2-3), and surrounding has the circular hole (1-2-4) of some fixing pore water pressure sensors; Rigidity stock (1-1) is fixedly connected with the threaded hole (1-2-3) at disk (1-2) center is vertical by bottom thread (1-1-1); Disk bottom cushion block (1-3) is fixed on disk (1-2) lower surface.
2. miniature small-range pore water pressure sensor simple calibrating device in a kind of aqueous medium according to claim 1, is characterized in that: described pore water pressure sensor stationary installation (1) is not fixedly connected with device pedestal (3).
3. miniature small-range pore water pressure sensor simple calibrating device in a kind of aqueous medium according to claim 1, is characterized in that: described rigidity stock (1-1) adopts polyamide fibre bar; Cushion block (1-3) adopts vulcanie to make, its thickness and scale zero line in the same size to the distance of device pedestal (3).
4. miniature small-range pore water pressure sensor simple calibrating device in a kind of aqueous medium according to claim 1, is characterized in that: the scale zero line of described plexiglass cylinder (2-1) does not overlap with bottom of cylinder; Valve (2-3) is copper core valve.
5. miniature small-range pore water pressure sensor simple calibrating device in a kind of aqueous medium according to claim 1, is characterized in that: described device pedestal (3) is organic glass base.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510890719.1A CN105403359B (en) | 2015-12-05 | 2015-12-05 | Miniature small-range pore water pressure sensor simple calibrating device in aqueous medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510890719.1A CN105403359B (en) | 2015-12-05 | 2015-12-05 | Miniature small-range pore water pressure sensor simple calibrating device in aqueous medium |
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| CN105403359A true CN105403359A (en) | 2016-03-16 |
| CN105403359B CN105403359B (en) | 2018-10-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4552011A (en) * | 1982-09-28 | 1985-11-12 | Phillips Petroleum Company | Establishing a differential pressure across a core sample or calibrating a differential pressure transducer |
| CN103234699A (en) * | 2013-05-09 | 2013-08-07 | 昆山市创新科技检测仪器有限公司 | Pressure sensor detection device and detection method thereof |
| CN103712740A (en) * | 2014-01-09 | 2014-04-09 | 中国人民解放军总参谋部工程兵科研三所 | Dynamic high-pressure calibration device of flat type pressure sensor |
| CN204064540U (en) * | 2014-07-09 | 2014-12-31 | 邓博团 | A kind of pore water pressure analogue experiment installation |
| CN204594624U (en) * | 2015-05-14 | 2015-08-26 | 浙江大学 | Embedded soil pressure cell simple calibrating device in a kind of sandy soil medium |
-
2015
- 2015-12-05 CN CN201510890719.1A patent/CN105403359B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4552011A (en) * | 1982-09-28 | 1985-11-12 | Phillips Petroleum Company | Establishing a differential pressure across a core sample or calibrating a differential pressure transducer |
| CN103234699A (en) * | 2013-05-09 | 2013-08-07 | 昆山市创新科技检测仪器有限公司 | Pressure sensor detection device and detection method thereof |
| CN103712740A (en) * | 2014-01-09 | 2014-04-09 | 中国人民解放军总参谋部工程兵科研三所 | Dynamic high-pressure calibration device of flat type pressure sensor |
| CN204064540U (en) * | 2014-07-09 | 2014-12-31 | 邓博团 | A kind of pore water pressure analogue experiment installation |
| CN204594624U (en) * | 2015-05-14 | 2015-08-26 | 浙江大学 | Embedded soil pressure cell simple calibrating device in a kind of sandy soil medium |
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| CN105403359B (en) | 2018-10-26 |
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