CN105953969A - Waist-shaped pipe strain type micro-pressure sensor based on orthotropic composite material - Google Patents
Waist-shaped pipe strain type micro-pressure sensor based on orthotropic composite material Download PDFInfo
- Publication number
- CN105953969A CN105953969A CN201610451237.0A CN201610451237A CN105953969A CN 105953969 A CN105953969 A CN 105953969A CN 201610451237 A CN201610451237 A CN 201610451237A CN 105953969 A CN105953969 A CN 105953969A
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- CN
- China
- Prior art keywords
- kidney
- shaped
- strain
- waist
- orthotropic
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- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0026—Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means
- G01L9/0027—Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means using variations in ohmic resistance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/04—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges
Abstract
The invention discloses a waist-shaped pipe strain type micro-pressure sensor based on an orthotropic composite material. The micro-pressure sensor comprises an orthotropic composite material waist-shaped cylinder elastomer element, a waist-shaped support plate, a waist-shaped support plate with a pressurization port, specially-produced special-purpose resistor strain sensitive elements and a miniaturized socket, wherein the waist-shaped support plate and the waist-shaped support plate with the pressurization port are respectively assembled at the two ends of the orthotropic composite material waist-shaped cylinder elastomer element, the four specially-produced special-purpose resistor strain sensitive elements are glued on the orthotropic composite material waist-shaped cylinder elastomer element, the miniaturized socket is accessed to the four specially-produced special-purpose resistor strain sensitive elements according to a full bridge, and thus a test bridge circuit is formed.
Description
Technical field:
The present invention relates to sensor technical field, particularly relate to a kind of fluid pressure sensor, be specially a kind of based on orthogonal
The kidney-shaped pipe strain-type micro-pressure sensor of opposite sex composite.
Background technology:
Along with the development of science and technology, sensor technology highlights, in state day by day in effect and the status of each department of national economy
The field tools such as anti-section work, detection technique, biochemical industry, electronic information technology are widely used.As sensor one
Important branch, the development of pressure (pressure in the pressure in engineering test, actually physics) sensor with should
With being also increasingly subject to the attention of people, be widely used to commercial production, intelligent building, Aero-Space, biology, medical treatment,
The various fields such as oil well, electric power, boats and ships, pipeline.Resistance strain type pressure sensor works based on resistance strain effect,
Mainly it is made up of elastic sensing element and foil gauge, by strain gauge bridge output voltage, have that precision is high, volume is little,
The advantages such as lightweight, measurement wide ranges, natural frequency height, dynamic response are fast.
The flexible member of resistance strain type pressure sensor is usually thin-wall circular tube, and after pressurized, its circumference is only drawn should
Become and the most identical.If making minute-pressure (0～10 by this pattern5Pa) sensor, the diameter of cylinder will be very big, and wall is very
Thin (can cause non-linear and hysteresis error), this is unallowed on using.
Research shows, changes circular cross-section into kidney-shaped, then can there is bending strain, and the circumferential strain showing as outer surface is each
Place's difference.When the dimensional parameters of waist type adjusts to certain numerical value, the circumferential strain at outer surface will appear from drawing, compressive strain district
Territory.Highly sensitive micro-pressure sensor just can be made by position installing resistance-strain sensing element.
But, after isotropic material cylinder (pipe) type flexible member pressurized, although axial strain is less than circumferential strain,
But can not ignore.The existence strong influence of the axial strain measuring accuracy of strain sensor, and then have impact on sensing
The precision of device.And, composite is lightweight with it, intensity is high, machine-shaping is convenient, designability is strong, elasticity is excellent
Good, be easy to the features such as large area monolithic molding, resistance to chemical attack and good weatherability, the most progressively replace timber and metal alloy,
It is widely used in the fields such as Aero-Space, automobile, electronics, building.Obviously, the elastic unit being made up of isotropic material
Part, because of its inherent shortcoming, limits resistance strain type pressure sensor application in composite structure.
Summary of the invention:
The present invention provides a kind of kidney-shaped pipe strain-type micro-pressure sensor based on Orthotropic Composite Materials, light weight, precision
Height, tests for fluid micro-pressure, it is also possible to make the instrument such as measurement height, density, flow, speed based on it,
It is particularly suited for composite structure.
The present invention adopts the following technical scheme that a kind of kidney-shaped pipe strain-type minute-pressure based on Orthotropic Composite Materials senses
Device, including Orthotropic Composite Materials kidney-shaped cylinder elastomer element, kidney-shaped gripper shoe, band pressurization mouth kidney-shaped gripper shoe,
Special special resistors strain sensor and mini jack, described kidney-shaped gripper shoe and the kidney-shaped gripper shoe of band pressurization mouth
Being assemblied in the two ends of Orthotropic Composite Materials kidney-shaped cylinder elastomer element respectively, 4 described special special resistors strains are quick
Sensing unit is pasted on Orthotropic Composite Materials kidney-shaped cylinder elastomer element, in 4 special special resistors strain sensitive units
Press full-bridge on part and access mini jack, form test bridge.
Further, described Orthotropic Composite Materials kidney-shaped cylinder elastomer is that carbon fibre composite is made.
Further, described special resistors strain sensor includes vertical grid and horizontal grid, described vertical grid and horizontal grid are perpendicular sets
Put.
There is advantages that the present invention is using Orthotropic Composite Materials kidney-shaped cylinder as elastomer element, system
Become and there is high accuracy, highly sensitive strain-type micro-pressure sensor；Make full use of the mechanical property of fibrous composite in just
Hand over the feature of the opposite sex, it is to avoid the flexible member axial strain impact on circumferential strain, and then improve measuring accuracy；Fully profit
The feature drawn, compressive strain replaces is occurred by intrinsic pressure rear circumferential strain with kidney-shaped cylinder, selects suitable resistance-strain sensing element
Installation site, and then improve the sensitivity of sensor.The present invention tests for fluid micro-pressure, has light weight, precision
High, highly sensitive advantage, is particularly suited for composite structure.
Accompanying drawing illustrates:
Fig. 1 is kidney-shaped pipe strain-type micro-pressure sensor structural representation based on Orthotropic Composite Materials.
Fig. 2 is outer surface circumferential strain cloud atlas after Orthotropic Composite Materials kidney-shaped cylinder elastomer pressurized.
Fig. 3 is the structural representation of special special resistors strain sensor.
Wherein:
1--Orthotropic Composite Materials kidney-shaped cylinder elastomer；2--kidney-shaped gripper shoe；The kidney-shaped gripper shoe of 3--band pressurization mouth；
4--special special resistors strain sensor；4-1--indulges grid；The horizontal grid of 4-2--；5--mini jack.
Detailed description of the invention:
Refer to shown in Fig. 1, present invention kidney-shaped based on Orthotropic Composite Materials pipe strain-type micro-pressure sensor just includes
Hand over the opposite sex composite kidney-shaped cylinder elastomer element 1, kidney-shaped gripper shoe 2, band pressurization mouth kidney-shaped gripper shoe 3, special specially
By resistance strain sensor 4 and mini jack 5, wherein kidney-shaped gripper shoe 2 and the kidney-shaped gripper shoe 3 of band pressurization mouth
It is assemblied in the two ends of Orthotropic Composite Materials kidney-shaped cylinder elastomer element 1 (machine direction is consistent with circumference) respectively, when
After entrance pressure mouth is filled with pressure, kidney-shaped cylinder elastomer 1 can be considered two fixed ends, bears the kidney-shaped post shell of pressure.4 spies
Special resistors strain sensor 4 processed is pasted on Orthotropic Composite Materials kidney-shaped cylinder elastomer element 1,4 spies
Press full-bridge on special resistors strain sensor 4 processed and access mini jack 5, form test bridge.
In the present invention, Orthotropic Composite Materials kidney-shaped cylinder elastomer 1 is made for carbon fibre composite, and machine direction is along waist
Shape cylinder circumference.The orthogonal thereto opposite sex of its mechanical property, axial deformation response is far smaller than circumference DEFORMATION RESPONSE, can ignore not
Meter.Kidney-shaped gripper shoe 2 is the closure member of Orthotropic Composite Materials kidney-shaped cylinder elastomer 1 one end, can be considered clamped support.
Band pressurization mouth the closure member that kidney-shaped gripper shoe 3 is Orthotropic Composite Materials kidney-shaped cylinder elastomer 1 other end, when from
Pressurization mouth can be considered clamped support after being filled with pressure.Special special resistors strain sensor 4 can bear higher bridge pressure,
Thus obtain bigger output voltage values.Mini jack 5 is that the lead-in wire of the resistance-strain sensing element of composition test bridge connects
Enter end.
After refer to Fig. 2 Orthotropic Composite Materials kidney-shaped cylinder elastomer pressurized, outer surface circumferential strain cloud atlas selects special
Special resistors strain sensor 4 paste position.Fig. 2 show Finite element analysis results, in example used, orthogonal
The form parameter of opposite sex composite kidney-shaped cylinder elastomer 1 includes: length L, concave, convex curvature radius r1、r2, bent
Rate central angle θ, both sides semicircle radius of curvature is (r2-r1)/2.Used by Orthotropic Composite Materials kidney-shaped cylinder elastomer 1
Composite is T700 carbon fibre composite, and machine direction is along the week of Orthotropic Composite Materials kidney-shaped cylinder elastomer 1
To.Fig. 2 analysis result shows, the concave surface middle part of Orthotropic Composite Materials kidney-shaped cylinder elastomer 1 is respectively present two
The normal strain of group equivalence and negative strain peak value, be suitable as the paste position of special special resistors strain sensor 4.
In above-mentioned example, axial strain is 0, the measurement of circumferential strain will not be produced impact.
The structure of special special resistors strain sensor 4 as it is shown on figure 3, it includes vertical grid 4-1 and horizontal grid 4-2, its
In vertical grid 4-1 and the horizontal perpendicular setting of grid 4-2.
The above is only the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, some improvement can also be made under the premise without departing from the principles of the invention, also should be regarded as protection scope of the present invention.
Claims (3)
1. a kidney-shaped pipe strain-type micro-pressure sensor based on Orthotropic Composite Materials, it is characterised in that: include orthogonal
The opposite sex composite kidney-shaped cylinder elastomer element (1), kidney-shaped gripper shoe (2), band pressurization mouth kidney-shaped gripper shoe (3),
Special special resistors strain sensor (4) and mini jack (5), described kidney-shaped gripper shoe (2) and band pressurization
Mouthful kidney-shaped gripper shoe (3) be assemblied in the two ends of Orthotropic Composite Materials kidney-shaped cylinder elastomer element (1) respectively, 4
Described in sheet, special special resistors strain sensor (4) is pasted at Orthotropic Composite Materials kidney-shaped cylinder elastomer element (1)
On, access mini jack (5) at the upper full-bridge of pressing of 4 special special resistors strain sensors (4), form test bridge
Road.
2. kidney-shaped pipe strain-type micro-pressure sensor based on Orthotropic Composite Materials as claimed in claim 1, its feature
It is: described Orthotropic Composite Materials kidney-shaped cylinder elastomer (1) is that carbon fibre composite is made.
3. kidney-shaped pipe strain-type micro-pressure sensor based on Orthotropic Composite Materials as claimed in claim 2, its feature
It is: described special resistors strain sensor (4) includes vertical grid (4-1) and horizontal grid (4-2), described vertical grid (4-1)
With horizontal grid (4-2) perpendicular setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610451237.0A CN105953969A (en) | 2016-06-21 | 2016-06-21 | Waist-shaped pipe strain type micro-pressure sensor based on orthotropic composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610451237.0A CN105953969A (en) | 2016-06-21 | 2016-06-21 | Waist-shaped pipe strain type micro-pressure sensor based on orthotropic composite material |
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| Publication Number | Publication Date |
|---|---|
| CN105953969A true CN105953969A (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610451237.0A Pending CN105953969A (en) | 2016-06-21 | 2016-06-21 | Waist-shaped pipe strain type micro-pressure sensor based on orthotropic composite material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101573600A (en) * | 2006-10-12 | 2009-11-04 | 普拉德研究及开发股份有限公司 | Pressure sensor |
| CN201434739Y (en) * | 2009-06-24 | 2010-03-31 | 阎珠沈 | Flat tube type pressure sensor |
| CN102095362A (en) * | 2010-11-20 | 2011-06-15 | 武汉理工大学 | Grid-type carbon fiber strain transducer |
| CN102455229A (en) * | 2010-11-02 | 2012-05-16 | 唐淑娟 | High-precision sensor |
| WO2012103073A2 (en) * | 2011-01-24 | 2012-08-02 | President And Fellows Of Harvard College | Non-differential elastomer curvature sensor |
| CN104781067A (en) * | 2013-01-30 | 2015-07-15 | 波音公司 | Veil-stabilized composite with improved tensile strength |
-
2016
- 2016-06-21 CN CN201610451237.0A patent/CN105953969A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101573600A (en) * | 2006-10-12 | 2009-11-04 | 普拉德研究及开发股份有限公司 | Pressure sensor |
| CN201434739Y (en) * | 2009-06-24 | 2010-03-31 | 阎珠沈 | Flat tube type pressure sensor |
| CN102455229A (en) * | 2010-11-02 | 2012-05-16 | 唐淑娟 | High-precision sensor |
| CN102095362A (en) * | 2010-11-20 | 2011-06-15 | 武汉理工大学 | Grid-type carbon fiber strain transducer |
| WO2012103073A2 (en) * | 2011-01-24 | 2012-08-02 | President And Fellows Of Harvard College | Non-differential elastomer curvature sensor |
| CN104781067A (en) * | 2013-01-30 | 2015-07-15 | 波音公司 | Veil-stabilized composite with improved tensile strength |
Non-Patent Citations (3)
| Title |
|---|
| 张天军、朱向会: "《工程力学实验》", 31 August 2009 * |
| 陶宝祺、王妮、朱昌毅: "腰形管应变式微压强传感器及其应用", 《仪器仪表学报》 * |
| 骆英、陶宝祺: "片状正交异性压电复合材料的研究", 《材料导报》 * |
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Application publication date: 20160921 |