CN2308089Y - Triaxial pressure transducer - Google Patents
Triaxial pressure transducer Download PDFInfo
- Publication number
- CN2308089Y CN2308089Y CN 97207189 CN97207189U CN2308089Y CN 2308089 Y CN2308089 Y CN 2308089Y CN 97207189 CN97207189 CN 97207189 CN 97207189 U CN97207189 U CN 97207189U CN 2308089 Y CN2308089 Y CN 2308089Y
- Authority
- CN
- China
- Prior art keywords
- elastic body
- triaxial pressure
- utility
- model
- triaxial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000012856 packing Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910000906 Bronze Inorganic materials 0.000 claims description 2
- 229910000639 Spring steel Inorganic materials 0.000 claims description 2
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 2
- PRSVGTLZWHPRBM-UHFFFAOYSA-N [Mn].[Si].[Ni].[Cr] Chemical compound [Mn].[Si].[Ni].[Cr] PRSVGTLZWHPRBM-UHFFFAOYSA-N 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000010974 bronze Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 5
- 229920001971 elastomer Polymers 0.000 abstract description 4
- 239000000806 elastomer Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Images
Abstract
The utility model provides a triaxial pressure transducer, composed of a cylindrical elastomer, an outer cover, an upper cover cap, a base, an upper press block, a sealing piece, a plurality of groups of wheatstone bridges, a cable and a connecting device. The elastomer can convert triaxial pressure simultaneously bearing longitudinal load P and the fluid pressure q of a side face into strain, the utility model realizes the mutual conversion and measurement of the strain, the resistance variation and the electrical signal variation through the networks of a plurality of groups of bridges pasted on the surface of the inner cavity of the elastomer under the excitation of an outer source when three axes extert actions, and the measuring result of the utility model calibrates the number values of the triaxial pressure load P and q through special data processing software. The utility model has the advantages of compact structure, strong function and simple and accurate calibrating measurement.
Description
The utility model relates to a kind of sensed data conversion equipment, especially a kind of pressure transducer.
The major function of triaxial test machine is to provide triaxial pressure to measure to test specimen, is to realize in three cylinders of triaxial test machine, provides axial mechanical load by axial piston and corresponding end block, and provides confined pressure by the pressure fluid that feeds in three cylinders.These two kinds of pressure are by obtaining in relatively independent two systems of triaxial test machine.The former demarcates by (as the uniaxial test machine) available existing load sensor in complete autonomous system.And in hydraulic system, pressure (by force) available pressure transducer calibration.But in three cylinders of triaxial test machine, two kinds of pressure are looked the resonable degree of three-axis structure, have in various degree effect of intercoupling and profound other problem.So far still do not have the alleged triaxial pressure sensor of corresponding the utility model and can in three cylinders, demarcate true xial feed and the hydrodynamic pressure that two kinds of pressure are done the time spent simultaneously.Also exist similar problem to be badly in need of solving in human lives and the commercial production, as the submarine structure part of offshore drilling platforms, the huge loading of platform is born on its top, and the hydrodynamic pressure that the side is born the seawater deep simultaneously needs accurately to detect.
The purpose of this utility model is to design and a kind ofly new can demarcate two kinds of pressure in three cylinders and make the true xial feed of time spent and the triaxial pressure sensor of hydrodynamic pressure simultaneously for overcoming above-mentioned the deficiencies in the prior art part, solves detection demarcation or aut.eq. problem that present triaxial test machine does not still have respective sensor demarcation and corresponding triaxial pressure occasion.
Task of the present utility model is implemented as follows, a kind of triaxial pressure sensor that is applicable to that axial mechanical load of demarcation and side hydrodynamic pressure act on simultaneously, it comprises elastic body, there is outer cover its outside, the lower end has base to be threaded with outer cover, on the faying face of the lower surface of elastic body and base O-ring seal is housed, upper holder block is equipped with in the elastic body upper surface, on elastomeric upper surface and the upper holder block surface of contact packing washer is housed; Upper cover is equipped with in the outside of upper holder block, and upper cover is threaded with outer cover, between outer cover upper surface and upper cover packing ring is housed, and is pasted with many group resistance bridges on the elastic body internal chamber wall, and draws its leader cable from the hole of base.Described elastic body is a cylindrical drum, and its both ends of the surface have flange outward.
The utility model has following advantage compared with the prior art: it is a kind of novel triaxial pressure sensor that integrates load sensor and pressure transducer, and it has solved detection demarcation or the automaton problem that present triaxial test machine does not still have respective sensor demarcation and corresponding triaxial pressure occasion; It is an electromechanical integration, the New Product that software and hardware combines, and its compact conformation, powerful, calibration measurements is simple and convenient, accurate; Also can become the critical elements of automation field.
Description of drawings:
Fig. 1 is a block scheme of the present utility model.
Fig. 2 is the structural drawing of sensor of the present utility model.
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail, as shown in Figures 1 and 2, the surveying instrument that the triaxial pressure sensor is made up of sensor, secondary instrument and three parts of microcomputer.It is the force cell element that sensor adopts cylindrical shape isotropic elasticity body, the triaxial pressure that bears longitudinal loading p and side hydrodynamic pressure q simultaneously can be converted to strain; Form many group network of electrical bridge by sticking on the some groups of strain ga(u)ges of arranging in a certain way on the elastic body surface of internal cavity (flower), under the excitation of additional power source, the realization triaxial pressure is done the time spent, by the mutual conversion and the measurement of strain, resistance variations, change in electric.
When axial nominal stress p=P/S (wherein P is an xial feed, and S is the sectional area of annulus), act on the elastic body axis direction, when hydrodynamic pressure q acts on the elasticity external cylindrical surface simultaneously, the triaxial stress state that the elastic body midsection produces in the ideal case, σ
1With σ
2=σ
3But (1) because the deformation characteristic of isotropic elasticity body: have two independently elastic constants, elastic modulus and Poisson ratio, therefore, the true stress state σ that causes on the midsection
1, σ
2And σ
3With the simple relation that the triaxial pressure p and the q of separate formation do not have direct correspondent equal, σ
1≠ p, σ
2=σ
3≠ q; (2) again because elastic body is a geometric properties cylindraceous, the stress state difference of different radial positions on the midsection.But, ideally, have identical stress state σ again on the same radial position circumference
1, σ
2=σ
3The deviser has correctly solved above-mentioned relation through strict analysis and research and experimental check.Utilize elastic body inside surface adhering resistance strainometer (flower), provide the exclusive data process software, be used to demarcate the numerical value of triaxial pressure load p (perhaps P) and q the strain measurement data of this sensing surface different directions.
The triaxial pressure sensor construction is made up of base 1, O-ring seal 2, outer cover 3, elastic body 4, packing ring 5, packing washer 6, upper cover 7, upper holder block 8 and strain ga(u)ge (flower) 9.Wherein: base 1 is a short cylinder, there is protruding circular ring its outer ring, cylinder upper end, there is toroidal cavity its inboard, O-ring seal 2 places in the groove, on the recessed annulus periphery external thread is arranged, there is blind hole at the short cylinder center, and has radial direction through hole to communicate with center pit, and this hole is the outlet that elastic body inner chamber network of electrical bridge is drawn leader cable; Outer cover 3 is thin-walled round busses, is evenly distributed with slotted hole around it, and there is external thread the upper end, and there is internal thread the lower end, is threaded with base 1, and upper external screw thread is threaded with upper cover 7; Elastic body 4 is cylindrical shape elastic bodys, and it is the key function element of three-axis sensor, requires it to have stable isotropic elasticity constant, elastic modulus and Poisson ratio, and its machining precision and surface smoothness all had higher requirement.It is to use chrome-nickel-molybdenum steel, chromium manganese silicon (nickel) steel, beryllium-bronze, spring steel or titanium alloy material manufacture, packing ring 5 is annular circles, it is contained between outer cover 3 and the upper cover 7, play the liner effect, packing washer 6 is annular seal circles, it is contained in the surface of contact of elastic body 4 and upper holder block 8, play the effect suitable for reading of sealing elastomer inner chamber, upper cover 7 is cylinders of a stepped appearance endoporus, its endoporus bottom is a threaded hole, and upper holder block 8 is that a periphery is step-like right cylinder, and its underpart end face has an annular groove to match with the ring surface of elastic body 4 upper surface projectioies, strain ga(u)ge (flower) 9 is formed full-bridge, also can adopt half-bridge arrangement.Sticking on many groups resistance bridge of the middle part of elastic body inwall, is axial strain and the hoop strain that is used to measure place, elastic body inner chamber midsection.
The leader cable of being drawn by elastic body inner chamber network of electrical bridge is connected with secondary instrument, reads strain data by secondary instrument.Utilize the exclusive data process software in the microcomputer to handle, just can demarcate the numerical value of triaxial pressure load p (perhaps P) and q.
Claims (3)
1. one kind is applicable to and demarcates the triaxial pressure sensor that axial mechanical load and side hydrodynamic pressure act on simultaneously, it is characterized in that: it comprises elastic body (4), there is outer cover (3) its outside, the lower end has base (1) to be threaded with outer cover (3), on the faying face of the lower surface of elastic body (4) and base (1) O-ring seal (2) is housed, upper holder block (8) is equipped with in elastic body (4) upper surface, on the upper surface of elastic body (4) and upper holder block (8) surface of contact packing washer (6) is housed; Upper cover (7) is equipped with in the outside of upper holder block (8), upper cover (7) is threaded with outer cover (3), between outer cover (3) upper surface and upper cover (7), packing ring (5) is housed, on elastic body (4) internal chamber wall, be pasted with many group resistance bridges (9), and from the hole of base (1), draw its leader cable.
2. triaxial pressure sensor according to claim 1 is characterized in that: described elastic body (4) is a cylindrical drum, and its both ends of the surface have flange outward.
3. triaxial pressure sensor according to claim 1 and 2 is characterized in that: described elastic body (4) is made with chrome-nickel-molybdenum steel, chromium manganese silicon (nickel) steel, beryllium-bronze, spring steel or titanium alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97207189 CN2308089Y (en) | 1997-02-06 | 1997-02-06 | Triaxial pressure transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97207189 CN2308089Y (en) | 1997-02-06 | 1997-02-06 | Triaxial pressure transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2308089Y true CN2308089Y (en) | 1999-02-17 |
Family
ID=33927009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97207189 Expired - Fee Related CN2308089Y (en) | 1997-02-06 | 1997-02-06 | Triaxial pressure transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2308089Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865649A (en) * | 2010-06-04 | 2010-10-20 | 中南大学 | Micro strain gauge for triaxial instrument strain measurement and manufacturing method thereof |
| US8316723B2 (en) | 2007-11-02 | 2012-11-27 | Aktiebolaget Skf | Combination of bearing component and sensor |
| CN105891038A (en) * | 2015-01-14 | 2016-08-24 | 中国矿业大学(北京) | Triaxial loading calibrator for industrial CT and calibration process |
-
1997
- 1997-02-06 CN CN 97207189 patent/CN2308089Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8316723B2 (en) | 2007-11-02 | 2012-11-27 | Aktiebolaget Skf | Combination of bearing component and sensor |
| CN101918805B (en) * | 2007-11-02 | 2013-02-27 | Skf公司 | Combination of bearing component and sensor |
| CN101865649A (en) * | 2010-06-04 | 2010-10-20 | 中南大学 | Micro strain gauge for triaxial instrument strain measurement and manufacturing method thereof |
| CN105891038A (en) * | 2015-01-14 | 2016-08-24 | 中国矿业大学(北京) | Triaxial loading calibrator for industrial CT and calibration process |
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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 |