CN106323206A - Real time temperature compensating vibratory string sensor - Google Patents
Real time temperature compensating vibratory string sensor Download PDFInfo
- Publication number
- CN106323206A CN106323206A CN201610621574.XA CN201610621574A CN106323206A CN 106323206 A CN106323206 A CN 106323206A CN 201610621574 A CN201610621574 A CN 201610621574A CN 106323206 A CN106323206 A CN 106323206A
- Authority
- CN
- China
- Prior art keywords
- vibratory string
- string
- sensor
- time temperature
- vibratory
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a real time temperature compensating vibratory string sensor comprising a vibratory string, an excitation wire coil and at least one thermal bimetal sheet that are arranged in a shell body of the sensor, wherein the vibratory string is welded at a middle part of the thermal bimetal sheet, the thermal bimetal sheet is fixed on support seats in a suspended manner, the support seats are fixed on two ends of the shell body of the sensor, the excitation wire coil is arranged on a middle part of the vibratory string, and the thermal bimetal sheet is a long strip structure which is bent into an arc shape. The real time temperature compensating vibratory string sensor is based on different thermal expansion coefficients of all element layers of the thermal bimetal sheet; when temperature changes, an active layer is greater than a passive layer in deformation, a whole body of the bimetal sheet bends toward one side of the passive layer, effects exerted on measurement results can be reduced via chord length change of the compensating vibratory string which expand with heat and contracts with cold, measurement precision can be improved, neither a temperature probe nor a complex compensation experiment and algorithm is needed, and a steel string can be prevented from malfunctioning, fracturing or the like even in severe conditions.
Description
Technical field
The invention belongs to structure measurement field, be specifically related to displacement or the deformation measurement of a kind of building field large structure
Use vibrating wire sensor.
Background technology
In the routine servicing of large structure, deformation or displacement measurement to its critical component are particularly significant, above-mentioned are subject to
The stress size of power component and changes in distribution the most directly reflect the health status of structure, the therefore force-bearing situation to these components
Monitoring and the assessment of safety analysis on this basis are significant.
Vibrating string type sensor is one of sensor the most advanced in dynamometry application aspect at present, and its sensing element is one
Metal silk string, it is connected fixing with force acting on transducer parts, utilizes the natural frequency of vibration of string wire and the external tension suffered by string wire
Relational expression records various physical quantity, and the output of this sensor is frequency signal, and therefore its capacity of resisting disturbance is strong, temperature drift, drift
Little, affected little by electrical quantity, stable and reliable for performance, adapt to long-term observation and Distance Test under mal-condition, so by extensively
Generally in the monitoring of the ess-strain of the engineerings such as reservoir dam, port engineering, bridge, foundation ditch, deformation, seepage flow, liquid level etc..
Generally vibrating wire sensor is become by cavity stress generation type, changes the stress of string wire, from changing consolidating of string wire
There is frequency, then make string wire vibrate by external force, test this frequency of vibration, obtain the size of stress, deformation, displacement.By
Relevant to chord length in the frequency of vibratory string, and chord length is easily subject to the impact of external environment,
2012 " digital technology and application " disclosed " vibrating wire sensor temperature-compensating based on PSO-LSSVM " proposes
A kind of compensation schemes based on temperature sensor, i.e. arranges a temperature probe on vibrating wire sensor, uses test
Ambient temperature, is calculated by algorithm and obtains correction value, there is algorithm complicated, cause the inconvenience of application in actual application.And
And in the wider scope of some temperature, under such as ultra-high temperature condition, string wire may be caused to exceed measurement scope, or beyond elasticity
The string wire that scope causes lost efficacy or fracture.
Summary of the invention
It is an object of the invention to overcome the measurement result that in existing vibrating wire sensor, vibratory string environment sensitive to external world causes
The problems such as the inefficacy that inaccurate or string wire causes beyond elastic range, it is proposed that the vibrating wire sensor of a kind of real-time temperature compensation.
Technical scheme is as follows:
The vibrating wire sensor of a kind of real-time temperature compensation, including the vibratory string being arranged within sensor housing, excitation coil
At least one thrermostatic bimetal-plate, described vibratory string is welded on the middle part of thrermostatic bimetal-plate, and described thrermostatic bimetal-plate is unsettled solid
Being scheduled on bearing, described bearing is fixed on the two ends of sensor housing, and excitation coil is arranged on the middle part of vibratory string.
In the vibrating wire sensor of above-mentioned real-time temperature compensation, thrermostatic bimetal-plate is the strip structure bending to arc.
In the vibrating wire sensor of above-mentioned real-time temperature compensation, vibratory string goes up thermal coefficient of expansion less than housing along its length along shaking
Thermal coefficient of expansion on chord line, the active layers of thrermostatic bimetal-plate is arranged on the side of vibratory string.
In the vibrating wire sensor of above-mentioned real-time temperature compensation, vibratory string goes up thermal coefficient of expansion more than housing along its length along shaking
Thermal coefficient of expansion on chord line, the passive layer of thrermostatic bimetal-plate is arranged on the side of vibratory string.
The Advantageous Effects that the present invention has is as follows:
(1) the invention provides a kind of vibrating wire sensor compensation schemes based on thrermostatic bimetal-plate, utilize the double gold of heat
The thermal coefficient of expansion belonging to sheet each constituent element layer is different, and when the temperature is changed, the deformation of active layers is greater than the deformation of passive layer, thus
The entirety of bimetal leaf will compensate the vibratory string chord change when expanding with heat and contract with cold to passive layer curving, reduces temperature pair
The impact of measurement result, improves certainty of measurement, saves temperature probe and the compensation experiment of complexity and algorithm, can ensure that string wire simultaneously
Mal-condition under also will not lose efficacy or the situation such as fracture occurs.
(2) present invention is according to housing and the material of string wire and thermal coefficient of expansion thereof, the material of reselection bimetal leaf and
The vibrating wire sensor parameter that ambient temperature i.e. can be caused by the curvature of bending in advance carries out effective compensation, it is adaptable to multiple housing
With string wire material, apply relatively broad.
Accompanying drawing explanation
Fig. 1 is the present invention vibrating wire sensor principle schematic with thrermostatic bimetal-plate；
Operation principle schematic diagram when Fig. 2 is thrermostatic bimetal-plate thermal expansion of the present invention；
Fig. 3 is the top view of Fig. 2 thrermostatic bimetal-plate.
In figure: 1-vibratory string；2-excitation coil；3-sensor housing；4-bearing；5-thrermostatic bimetal-plate；6-processes circuit；7-
Active layers；8-passive layer.
Detailed description of the invention
As it is shown in figure 1, the vibrating wire sensor of the real-time temperature compensation of the present invention, internal including being arranged on sensor housing 3
Vibratory string 1, excitation coil 2 and thrermostatic bimetal-plate 5, vibratory string 1 is welded on the middle part of thrermostatic bimetal-plate 5, and thrermostatic bimetal-plate 5 is unsettled solid
Determining on the carrier 4, bearing 4 is fixed on the two ends of sensor housing 3, and excitation coil 2 is arranged on the middle part of vibratory string 1.
The operation principle of vibrating wire sensor is, under electric excitation, vibratory string 1, by its natural frequency vibration, changes opening of vibratory string 1
Power F, can obtain different frequency of vibration F, i.e. tension force and become monotropic function relation with resonant frequency.When vibratory string is become by tension length
After changing Δ l, then haveWherein ρνFor the body density of string, E is the elastic modelling quantity of vibratory string, and l is chord length.Actual application
Time, when the housing 3 of vibrating string type sensor is by dilatation, drives the positioning support at two ends to produce mobile, thus cause and shake
String 1 extends or shrinks, and by detecting the change of vibratory string frequency, realizes the measurement of displacement and deformation.
But change the factor of chord length in actual applications in addition to extraneous displacement, also because being changed by ambient temperature,
The change being embodied in the difference of the thermal coefficient of expansion of vibratory string 1 and housing 3 and cause.Vibratory string 1 generally uses high-carbon steel to make, and
Housing uses common mould steel to make, and therefore the thermal coefficient of expansion of string wire is less than the housing thermal coefficient of expansion along string wire direction,
Therefore when the temperature increases, string wire can produce and tighten, even beyond elastic range, and when the temperature decreases, string wire can produce again pine
Relaxation state, causes being difficult to starting of oscillation, and this expanding with heat and contract with cold and cause the change of chord length, the change of vibratory string output frequency can be caused equally
Change, therefore in high-acruracy survey, generally one temperature probe is set at sensor internal, obtained by experiment or theory analysis
The impact on chord length and frequency that what temperature caused expand with heat and contract with cold, and measurement result is compensated.
The present invention proposes a kind of real-time temperature compensation scheme, is fixed by one or two thrermostatic bimetal-plates 5 by vibratory string 1
On the housing 3 of sensor, compensate the vibratory string 1 chord change when expanding with heat and contract with cold, reduce the temperature impact on measurement result, carry
High measurement accuracy, saves temperature probe and the compensation experiment of complexity and algorithm, can ensure that under the mal-condition of string wire the most simultaneously
Can lose efficacy or the situation such as fracture occurs.
Thrermostatic bimetal-plate 5 is the thermal coefficient of expansion difference utilizing each constituent element layer, and when the temperature is changed, the deformation of active layers is wanted
More than the deformation of passive layer, thus the entirety of bimetal leaf will be to passive layer curving, due to the thermal expansion of each constituent element layer
Coefficient is different, and wherein, what the coefficient of expansion was higher is referred to as active layers；What the coefficient of expansion was relatively low is referred to as passive layer.
But it is as the expansion of bimetallic application and the progress of combination technology, three layers, four layers, double gold of five layers occurred modern age mutually
Belong to.It is true that every temperature dependent changes and the combined material of change of shape occurs, double golden in still referred to as heat traditionally now
Belong to.
As shown in Figures 2 and 3, bimetal leaf 5 is elongated laminated structure, and in advance towards the direction bending one of vibratory string 1
Fixed curvature, and the active layers 7 of thrermostatic bimetal-plate 5 is arranged on the side of vibratory string 1, the most when the temperature increases, active layers 7 shape
Become relatively big, cause in the middle part of thrermostatic bimetal-plate 5 protruding to the direction of string wire, compensate owing to case swells coefficient causes more greatly string wire
Tighten.When the temperature decreases, the bending curvature radius of thrermostatic bimetal-plate 5 can reduce, and produces pine thus without making string wire 1
Relax, as long as according to housing and the material of string wire and thermal coefficient of expansion thereof, the material of reselection bimetal leaf and bending in advance
The vibrating wire sensor parameter that ambient temperature i.e. can be caused by curvature carries out effective compensation.
It should be noted that above simply show when the thermal coefficient of expansion of string wire is swollen along the heat in string wire direction less than housing
Scheme during swollen coefficient, in like manner exchanges the bending direction of thrermostatic bimetal-plate and the direction of active layers and passive layer, i.e.
May be used for the thermal coefficient of expansion when string wire more than housing along the thermal coefficient of expansion in string wire direction time situation.
Claims (4)
1. the vibrating wire sensor of a real-time temperature compensation, it is characterised in that: include being arranged on internal the shaking of sensor housing (3)
String (1), excitation coil (2) and at least one thrermostatic bimetal-plate (5), described vibratory string (1) is welded in thrermostatic bimetal-plate (5)
Portion, described thrermostatic bimetal-plate (5) is unsettled to be fixed on bearing (4), and described bearing (4) is fixed on sensor housing (3)
Two ends, excitation coil (2) is arranged on the middle part of vibratory string (1).
The vibrating wire sensor of real-time temperature compensation the most according to claim 1, it is characterised in that: described thrermostatic bimetal-plate
(5) it is the strip structure bending to arc.
The vibrating wire sensor of real-time temperature compensation the most according to claim 1 and 2, it is characterised in that: described vibratory string (1) edge
On length direction, thermal coefficient of expansion is less than the housing (3) thermal coefficient of expansion along vibratory string direction, and the active of thrermostatic bimetal-plate (5)
Layer (7) is arranged on the side of vibratory string.
The vibrating wire sensor of real-time temperature compensation the most according to claim 1 and 2, it is characterised in that: described vibratory string (1) edge
On length direction, thermal coefficient of expansion is more than the housing (3) thermal coefficient of expansion along vibratory string direction, and thrermostatic bimetal-plate (5) is passive
Layer (7) is arranged on the side of vibratory string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621574.XA CN106323206A (en) | 2016-08-01 | 2016-08-01 | Real time temperature compensating vibratory string sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621574.XA CN106323206A (en) | 2016-08-01 | 2016-08-01 | Real time temperature compensating vibratory string sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106323206A true CN106323206A (en) | 2017-01-11 |
Family
ID=57739592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610621574.XA Pending CN106323206A (en) | 2016-08-01 | 2016-08-01 | Real time temperature compensating vibratory string sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106323206A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645953A (en) * | 2019-11-06 | 2020-01-03 | 湖南华菱湘潭钢铁有限公司 | Prediction method for hot-cutting deformation of strip-shaped steel plate |
| CN111622807A (en) * | 2020-07-29 | 2020-09-04 | 矿冶科技集团有限公司 | Mine in-situ filling body mechanical evaluation system and method |
| CN113840059A (en) * | 2020-06-24 | 2021-12-24 | 宁波舜宇光电信息有限公司 | Photosensitive assembly, camera module and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4029979A (en) * | 1975-06-16 | 1977-06-14 | The Garrett Corporation | Fluidic to electric transducer and method |
| CN2872307Y (en) * | 2005-09-28 | 2007-02-21 | 孟金明 | Intelligent string sensor |
| CN2874429Y (en) * | 2005-09-28 | 2007-02-28 | 孟金明 | Intelligent string type sensor |
| CN2893652Y (en) * | 2006-01-12 | 2007-04-25 | 张新民 | Intelligent coding steel wire sensor |
| CN203758525U (en) * | 2014-01-20 | 2014-08-06 | 江西飞尚科技有限公司 | Vibrating wire sensor capable of increasing material temperature compensation |
-
2016
- 2016-08-01 CN CN201610621574.XA patent/CN106323206A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4029979A (en) * | 1975-06-16 | 1977-06-14 | The Garrett Corporation | Fluidic to electric transducer and method |
| CN2872307Y (en) * | 2005-09-28 | 2007-02-21 | 孟金明 | Intelligent string sensor |
| CN2874429Y (en) * | 2005-09-28 | 2007-02-28 | 孟金明 | Intelligent string type sensor |
| CN2893652Y (en) * | 2006-01-12 | 2007-04-25 | 张新民 | Intelligent coding steel wire sensor |
| CN203758525U (en) * | 2014-01-20 | 2014-08-06 | 江西飞尚科技有限公司 | Vibrating wire sensor capable of increasing material temperature compensation |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645953A (en) * | 2019-11-06 | 2020-01-03 | 湖南华菱湘潭钢铁有限公司 | Prediction method for hot-cutting deformation of strip-shaped steel plate |
| CN113840059A (en) * | 2020-06-24 | 2021-12-24 | 宁波舜宇光电信息有限公司 | Photosensitive assembly, camera module and electronic equipment |
| WO2021258945A1 (en) * | 2020-06-24 | 2021-12-30 | 宁波舜宇光电信息有限公司 | Photosensitive assembly, camera module, and electronic device |
| CN113840059B (en) * | 2020-06-24 | 2023-07-25 | 宁波舜宇光电信息有限公司 | Photosensitive assembly, camera module and electronic equipment |
| CN111622807A (en) * | 2020-07-29 | 2020-09-04 | 矿冶科技集团有限公司 | Mine in-situ filling body mechanical evaluation system and method |
| CN111622807B (en) * | 2020-07-29 | 2024-03-22 | 矿冶科技集团有限公司 | Mine in-situ filling physical evaluation system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106323206A (en) | Real time temperature compensating vibratory string sensor | |
| CN107219377B (en) | Charge output element, assembly method and piezoelectric acceleration sensor | |
| RU2608331C1 (en) | Bending moment sensor for high-temperature vortex flow meters | |
| CN106289034A (en) | A kind of low-power consumption vibration wire sensor and excitation detection method thereof | |
| WO2010065286A1 (en) | Method and apparatus for pressure measurement using fill tube | |
| CN109828123B (en) | Two-dimensional acceleration sensor based on long-period fiber bragg grating bending characteristics and measuring method | |
| CN106225656A (en) | The excitation detection device of a kind of low-power consumption vibration wire sensor and excitation detection method | |
| KR20190064574A (en) | Piezoelectric energy harvesting using nonlinear buckled beams and methods therefor | |
| KR101179169B1 (en) | Temperature compensated load cell comprising strain gauges | |
| CN202075070U (en) | Device for measuring force bearing by adopting fibre bragg grating rod force sensor | |
| CN203376085U (en) | High precision double-end fixing resonant tuning fork type pressure sensor | |
| Sun et al. | A novel FBG-based accelerometer with high sensitivity and temperature self-compensation | |
| CN105091729B (en) | A kind of extend Strain Extensometer of bar of invar steel that adopts | |
| RU74466U1 (en) | SENSOR | |
| CN109738093B (en) | On-chip resonant beam structure for detecting stress of micro-electromechanical device and detection method | |
| Saboonchi et al. | MetalMUMPs-based piezoresistive strain sensors for integrated on-chip sensor fusion | |
| US8146436B2 (en) | Silicon sensing structure to detect through-plane motion in a plane of material with thermal expansion substantially different from that of silicon | |
| US9625338B2 (en) | Passive pressure sensing using sensor with resonator having bridged ends | |
| Xiaorui et al. | Analysis of the effects of thermo-mechanical stress on the frequency shift of MEMS resonators | |
| RU131195U1 (en) | MICROMECHANICAL SENSOR | |
| Karayil et al. | Performance analysis of MEMS piezoresistive cantilever based sensor for tuberculosis detection using coventorware FEA | |
| RU2280320C1 (en) | Thermally excited microresonator | |
| US9506828B2 (en) | Passive pressure sensing | |
| CN117889898B (en) | Fiber bragg grating sensor for strain and temperature double-parameter measurement | |
| Kalinkina et al. | Reducing the Temperature Error of Thin-Film Structures of Micromechanical Elements in Mechatronic Pressure Sensors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170111 |
|
| WD01 | Invention patent application deemed withdrawn after publication |