CN106441674A - Fiber-type force measurement sensing system and force measurement method - Google Patents
Fiber-type force measurement sensing system and force measurement method Download PDFInfo
- Publication number
- CN106441674A CN106441674A CN201610929247.0A CN201610929247A CN106441674A CN 106441674 A CN106441674 A CN 106441674A CN 201610929247 A CN201610929247 A CN 201610929247A CN 106441674 A CN106441674 A CN 106441674A
- Authority
- CN
- China
- Prior art keywords
- force
- flexible member
- optical fiber
- sensing system
- optical
- 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
- 238000005259 measurement Methods 0.000 title claims abstract description 23
- 238000000691 measurement method Methods 0.000 title abstract 2
- 230000003287 optical effect Effects 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000013307 optical fiber Substances 0.000 claims description 38
- 230000003068 static effect Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 description 21
- 239000000463 material Substances 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a fiber-type force measurement sensing system and a force measurement method. The system comprises an elastic element, a force measurement sensor, and an optical demodulating device. The force measurement sensor is fixed on the elastic element, and the force measurement sensor and the optical demodulating device achieves the signal connection. The method comprises the following steps: (a), carrying out the calibrating of the system through a standard force; (b), installing the elastic element at a to-be-measured position after calibration, and obtaining the size of an impact force at the to-be-measured position. The system and method can achieve the measurement of the impact force in a narrow space, do not need to change the original structure at the to-be-measured position, are flexible in installation, are not affected by electromagnetic interference, and are high in measurement precision.
Description
Technical field
The invention belongs to field of measuring technique is and in particular to a kind of optical fiber type force-measuring sensing system and force measuring method.
Background technology
The heat-transfer pipe of steam generator is susceptible to vibrate under the two phase flow effect of secondary side, and bundle vibration can cause
A series of mechanics problem of heat-transfer pipes.Wherein the most it is apparent that there being the place in gap that micro- vibration occurs between tube bank and support
Erosion.The generation of abrasion can become potential safety hazard by thinning pipe, and this kind of phenomenon seems to the steam generator of nuclear industry and more pays close attention to, because
Steam generator heat-transfer pipe bundle for nuclear industry also has the border effect of primary Ioops water, tube bank once occurring damaged, with putting
The primary Ioops water of penetrating property can leak into secondary circuit, causes extremely serious leakage accident.Therefore recognize and study heat-transfer pipe and prop up
Erosion problem between support is particularly important.And the erosion problem between will recognizing and assess heat-transfer pipe and supporting, need to survey
Impact force between amount heat-transfer pipe and support.
Generally speaking the gap very little between the heat-transfer pipe of steam generator and base, only a few tenths of a mm, base props up
The thickness of support also smaller only several millimeters thick, so little space has restriction to the installation of sensor.In little space and not
It is desirable to the sizableness of sensor size and bearing, the force transducer of existing electrical principles is all discontented for the flowing of impact liquid
This volume requirement of foot.Want waterproof, the flexible member of sensor can not be made thin little, therefore for the structure that installing space is limited
For be not easy to implement it is therefore desirable to research has and meets installing space, waterproof, the force cell of anti-electromagnetic interference.
Content of the invention
It is an object of the invention to provide a kind of optical fiber type force-measuring sensing system and force measuring method, solve current dynamometry and pass
Sensor cannot be suitable to small space and install, and is easily destroyed the original impact strength of measurement object, lead to certainty of measurement not high
Problem.
The present invention for achieving the above object, employs the following technical solutions realization：
A kind of optical fiber type force-measuring sensing system, including flexible member, force cell and Optical Demodulation device, force cell
It is fixed on flexible member, force cell is realized signal with Optical Demodulation device and is connected.
In this programme, traditional pressure transducer, such as tubulose deformable body adaptability to changes formula force transducer, quartz are abandoned
Pressure force transducer etc., traditional pressure transducer all has that volume is larger it is impossible to be applied to narrow space, such as
Gap between the heat-transfer pipe of steam generator and support base, this gap only has a few tenths of a mm, supports the thickness of base
Only several millimeters, such narrow space is quite limited for the installation of sensor.Based on this, the present invention devises one kind
Brand-new optical fiber type force-measuring sensing system, specifically has elastic component, force cell and Optical Demodulation device, flexible member
Material is identical with the material of impact site, specific in heat-transfer pipe and the shock supporting base, the material of flexible member and support
The material of base is identical, and what force cell measured is the impact force size between heat-transfer pipe and support base, force cell
The strain that flexible member is produced is converted to optical signal and inputs optics demodulating equipment, and Optical Demodulation device obtains and impact force pair
The data signal answered, by this data signal, obtains the numerical values recited of impact force.The present invention passes through to arrange flexible member, very well
Achieve the impact force measurement of small space, without changing position to be measured original structure, installation site is flexible.
Further, as optimal technical scheme, the shape of cross section of described flexible member is rectangle, and vertical sectional shape is
Trapezoidal.In this programme, using the flexible member of this structure, just can produce a bending in the impact force by very little and become
Shape, therefore, can be used for the measurement of less impact force；Furthermore, when power acts on the diverse location of flexible member, can lead to
To different responses, based on this, it is rectangle that the shape of flexible member is designed as shape of cross section by this programme, and vertical sectional shape is
Trapezoidal so that the response that same active force obtains in diverse location is consistent, thus the active position eliminating power is different and right
Respond the impact causing, improve certainty of measurement.
Further, as optimal technical scheme, the shape of cross section of described flexible member is trapezoidal, and vertical sectional shape is
Rectangle.In this programme, using the flexible member of this structure, can be used for the larger situation of impact force, meanwhile, flexible member is should
When planting structure, flexible member is center stressed, does not have the problem of application point, can simulate the stress feelings of impingement position well
Condition.
Further, as optimal technical scheme, described force cell is bonded on flexible member.Bonding can be fine
Realize the fixation of force cell, ensure fixing reliable on the basis of, simplify fixed form, will be able to be surveyed using seccotine
Force transducer is bonded on flexible member.
Further, as optimal technical scheme, described force cell is optical fiber enamel-amber sensor.Optical fiber enamel-amber passes
Sensor adopts optical fiber enamel-amber technology, and the strain that flexible member stress is produced carries out accurate measurement, and outputs optical signals to optics
Demodulating equipment, Optical Demodulation device is processed to optical signal and is ultimately converted to the representation of power, and this programme adopts optical fiber
Enamel-amber sensor, only need to measure optical signal and need not measure the signal of telecommunication so that the system has preferable sealing, not simultaneously
By electromagnetic interference, certainty of measurement is high.
A kind of force measuring method of employing optical fiber type force-measuring sensing system, comprises the following steps：
（a）Using proof force, optical fiber type force-measuring sensing system is demarcated；
（b）After demarcating, flexible member is installed on position to be measured, by Optical Demodulation device, obtains the shock of position to be measured
Power size.
Further, as optimal technical scheme, described step（a）Detailed process be：
（a11）Optical fiber enamel-amber sensor is bonded on flexible member, optical fiber enamel-amber sensor is connected to optics by optical fiber
Demodulating equipment；
（a12）Flexible member is acted on using proof force, flexible member is obtained under this proof force by Optical Demodulation device
Data signal, the data signal that proof force is obtained with Optical Demodulation device sets up corresponding relation.
Further, as optimal technical scheme, described step（a）Detailed process be：
Determine by the way of static(al), flexible member to be loaded on the device of force transducer in the standard of being provided with, inputted by measurement
Power and the voltage of output between relation demarcated.
The present invention compared with prior art, has advantages below and beneficial effect：
（1）The present invention passes through to arrange flexible member, and by force cell and Optical Demodulation device, achieves narrow and small well
The impact force measurement in space, without changing the original structure in position to be measured, installation site is flexible.
（2）The present invention is measured to impact force using optical fiber enamel-amber sensor, only need to measure optical signal and need not measure
The signal of telecommunication, so that the system has preferable sealing, is not subject to electromagnetic interference simultaneously, and certainty of measurement is high.
Brief description
Fig. 1 is heat-transfer pipe and the position relationship schematic diagram supporting base；
Fig. 2 is the schematic diagram of Optical Demodulation device.
Fig. 3 is the partial enlarged drawing one of A in Fig. 1；
Fig. 4 is the front view of Fig. 3；
Fig. 5 is the upward view of Fig. 3；
Fig. 6 is the partial enlarged drawing two of A in Fig. 1；
Fig. 7 is the front view of Fig. 6；
Fig. 8 is the upward view of Fig. 6；
Fig. 9 is the corresponding relation figure between proof force and optical fiber enamel-amber sensor output.
In figure reference is corresponding entitled：1st, flexible member, 2, force cell, 3, bearing, 4, optical fiber, 5, support
Base, 6, heat-transfer pipe.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Embodiment 1：
As shown in figure 1, supporting base 5 both heat-transfer pipe 6 to be played a supporting role, the flow channel of fluid also to be formed simultaneously, this
Just at fixing A in FIG, at A, position is narrow and small for invention, and the gap between heat-transfer pipe 6 and support base 5 is only less than 1 millimeter.
The optical fiber type force-measuring sensing system of the present embodiment includes flexible member 1, force cell 2 and Optical Demodulation device, and dynamometry passes
Sensor 2 is fixed on flexible member 1 it is preferred that force cell 2 is bonded on flexible member 1, facilitates force cell 2 to pacify
While dress, strain detecting to flexible member 1 is better achieved, force cell 2 and Optical Demodulation device realize signal even
Connect, the strain of flexible member 1 is converted to optical signal and is input in Optical Demodulation device by force cell 2, Optical Demodulation fills
Put and data signal is carried out being processed and converted to power, and output display, complete impact force detection, result output.Optical Demodulation fills
Put and convert optical signals into the signal of telecommunication and can use conventional data collecting system to carry out record analyses, as shown in Fig. 2 including post
Face mirror, wedge and CCD, optical signal according to this after cylindrical mirror, wedge by CCD element sorption enhanced.
As shown in Figures 3 to 5, specifically, the present embodiment has done following design to the shape of flexible member 1：Flexible member 1
Shape of cross section be rectangle, vertical sectional shape be trapezoidal, during use, larger one end be fixed on support base 5 on, and in order to
Do not affect to support the structure of base itself, facilitate the installation of flexible member simultaneously, the present embodiment increases bearing 3, bearing 3 using with
Support base 5 identical material, and bearing 3 is fixed on support base 5 by the way of gluing.This elasticity of the present embodiment
Component structure just can produce a flexural deformation in the impact force by very little, can be used for the survey of less impact force
Amount；Strain additionally, due to flexible member 1 maximum of the present embodiment occurs in root, that is, the part near support base 5,
Therefore, by flexible member 1 be arranged to can to eliminate after the structure that vertical sectional shape is rectangle power active position different and to sound
The impact that should cause, improves certainty of measurement.
Preferably, the present embodiment adopts optical fiber enamel-amber sensor as force cell, and optical fiber enamel-amber sensor is by bullet
Property element 1 produce strain be converted to optical signal and be input in Optical Demodulation device, optical fiber enamel-amber sensor due to adopt
It is that optical fiber enamel-amber technology measures to the strain of flexible member, certainty of measurement is very high.
Embodiment can realize the measurement of impact force by method below, specifically includes following steps：
（a）Using proof force, optical fiber type force-measuring sensing system is demarcated, specifically can be divided into dynamic and static two kinds, so-called
Dynamically, it is using proof force, flexible member to be tapped, flexible member produces strain, optical fiber enamel-amber sensor is by elasticity
The strain of element is converted to optical signal, and Optical Demodulation device is processed to this optical signal, obtains with the corresponding data of proof force
Signal；Change the size of proof force, obtain different data signals, thus corresponding between Criterion power and data signal
Relation, complete demarcate.From fig. 4, it can be seen that proof force is fine with the output linearity degree of sensor, the elasticity unit of the present embodiment
Part is reasonable in design, is fully compatible for the impact force measurement of small space.Static then be on the device that the standard of being provided with determines force transducer
By the way of static(al), flexible member is loaded, the relation between being inputted and exported by measurement is demarcated, and inputs
Embodiment can be demarcated with output with driving voltage size and chamber length respectively；
（b）After demarcating, flexible member is installed on position to be measured, specifically, flexible member is installed on bearing, and bearing passes through
Gluing mode is fixed on support base, and flexible member is contacted with heat-transfer pipe, and optical fiber enamel-amber sensor is fixed on elasticity unit
The back side of the contact surface of part and heat-transfer pipe, that is, flexible member be located at optical fiber enamel-between amber sensor and heat-transfer pipe, optical fiber enamel-amber
The strain that flexible member produces is converted to optical signal and is input in Optical Demodulation device, one, Optical Demodulation device by sensor
Data signal, by step（a）The demarcation relation obtaining, draws the impact force size that flexible member is subject to.
Embodiment 2：
As shown in Figure 6 to 8, the present embodiment is substantially the same manner as Example 1, and different places is, the flexible member 1 of the present embodiment
Employ following design：The shape of cross section of flexible member 1 is trapezoidal, and vertical sectional shape is rectangle.The elasticity unit of this kind of structure
The maximum strain of part occurs in center that is to say, that this flexible member is heat-transfer pipe and flexible member for measure
The position that center phase is clashed into, specific in heat-transfer pipe and the shock supporting base, the flexible member of the present embodiment with support base
Structure consistent, support base for simulation such that it is able to reflecting heat-transfer pipe and support the most real impact force of base, favorably
Erosion problem between preferably understanding and assessment heat-transfer pipe and support base.
The above, be only presently preferred embodiments of the present invention, and not the present invention is done with any pro forma restriction, every according to
Any simple modification above example made according to the technical spirit of the present invention, equivalent variations, each fall within the protection of the present invention
Within the scope of.
Claims (8)
1. a kind of optical fiber type force-measuring sensing system it is characterised in that：Including flexible member（1）, force cell（2）And optics
Demodulating equipment, force cell（2）It is fixed on flexible member（1）On, force cell（2）Realize signal with Optical Demodulation device
Connect.
2. a kind of optical fiber type force-measuring sensing system according to claim 1 it is characterised in that：Described flexible member（1）'s
Shape of cross section is rectangle, and vertical sectional shape is trapezoidal.
3. a kind of optical fiber type force-measuring sensing system according to claim 1 it is characterised in that：Described flexible member（1）'s
Shape of cross section is trapezoidal, and vertical sectional shape is rectangle.
4. a kind of optical fiber type force-measuring sensing system according to claim 1 and force measuring method it is characterised in that：Described dynamometry
Sensor（2）It is bonded in flexible member（1）On.
5. a kind of optical fiber type force-measuring sensing system according to any one of claim 1 ~ 4 and force measuring method it is characterised in that：
Described force cell（2）For optical fiber enamel-amber sensor.
6. the optical fiber type force-measuring sensing system described in a kind of employing claim 1 force measuring method it is characterised in that：Including following
Step：
（a）Using proof force, optical fiber type force-measuring sensing system is demarcated；
（b）After demarcating, flexible member is installed on position to be measured, by Optical Demodulation device, obtains the shock of position to be measured
Power size.
7. force measuring method according to claim 6 it is characterised in that：Described step（a）Detailed process be：
（a11）Optical fiber enamel-amber sensor is bonded on flexible member, optical fiber enamel-amber sensor is connected to optics by optical fiber
Demodulating equipment；
（a12）Flexible member is acted on using proof force, flexible member is obtained under this proof force by Optical Demodulation device
Data signal, the data signal that proof force is obtained with Optical Demodulation device sets up corresponding relation.
8. force measuring method according to claim 6 it is characterised in that：Described step（a）Detailed process be：
Determine by the way of static(al), flexible member to be loaded on the device of force transducer in the standard of being provided with, inputted by measurement
Power and output voltage between relation demarcated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929247.0A CN106441674A (en) | 2016-10-31 | 2016-10-31 | Fiber-type force measurement sensing system and force measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929247.0A CN106441674A (en) | 2016-10-31 | 2016-10-31 | Fiber-type force measurement sensing system and force measurement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106441674A true CN106441674A (en) | 2017-02-22 |
Family
ID=58177357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610929247.0A Pending CN106441674A (en) | 2016-10-31 | 2016-10-31 | Fiber-type force measurement sensing system and force measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106441674A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341910A (en) * | 2018-11-09 | 2019-02-15 | 中国核动力研究设计院 | The load cell and system of the impact force between vibrationproof item are restrained in a kind of measurement |
| CN109470387A (en) * | 2018-11-09 | 2019-03-15 | 中国核动力研究设计院 | A kind of load cell and system for restraining the impact force between support plate |
| CN114720032A (en) * | 2022-03-27 | 2022-07-08 | 重庆大学 | Optical fiber Fabry-Perot force sensing system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307678A (en) * | 1998-06-26 | 2001-08-08 | 塞德拉公司 | Non-intrusion fiber optic pressure-sensor for measuring unsteady pressures within pipe |
| CN1412527A (en) * | 2002-12-18 | 2003-04-23 | 南开大学 | Fibre-optic grating two-D sensor |
| CN101319944A (en) * | 2007-06-08 | 2008-12-10 | 昆山市康达电子仪表有限公司 | Force transducer for on-line detecting tension force of thread type object |
| CN201402196Y (en) * | 2009-05-12 | 2010-02-10 | 昆明理工大学 | Blind type optical fiber Bragg grating middle and low pressure sensor |
| CN101706340A (en) * | 2009-09-23 | 2010-05-12 | 上海贵宝机电有限公司 | Cantilever-type dynamic tension sensor |
| CN101975632A (en) * | 2010-11-04 | 2011-02-16 | 西北工业大学 | Temperature self-compensating fiber grating rod force sensor and using method thereof |
| US20110264398A1 (en) * | 2008-10-16 | 2011-10-27 | Pawel Niewczas | Fibre Optic Sensor System |
| CN103644987A (en) * | 2013-11-25 | 2014-03-19 | 中国航空工业集团公司北京长城计量测试技术研究所 | Optical fiber F-P (Fabry-Perot) cavity pressure sensor with temperature self compensation |
| CN105102921A (en) * | 2012-12-20 | 2015-11-25 | 通用电气公司 | Method and system for monitoring operating conditions in a steam generator |
-
2016
- 2016-10-31 CN CN201610929247.0A patent/CN106441674A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307678A (en) * | 1998-06-26 | 2001-08-08 | 塞德拉公司 | Non-intrusion fiber optic pressure-sensor for measuring unsteady pressures within pipe |
| CN1412527A (en) * | 2002-12-18 | 2003-04-23 | 南开大学 | Fibre-optic grating two-D sensor |
| CN101319944A (en) * | 2007-06-08 | 2008-12-10 | 昆山市康达电子仪表有限公司 | Force transducer for on-line detecting tension force of thread type object |
| US20110264398A1 (en) * | 2008-10-16 | 2011-10-27 | Pawel Niewczas | Fibre Optic Sensor System |
| CN201402196Y (en) * | 2009-05-12 | 2010-02-10 | 昆明理工大学 | Blind type optical fiber Bragg grating middle and low pressure sensor |
| CN101706340A (en) * | 2009-09-23 | 2010-05-12 | 上海贵宝机电有限公司 | Cantilever-type dynamic tension sensor |
| CN101975632A (en) * | 2010-11-04 | 2011-02-16 | 西北工业大学 | Temperature self-compensating fiber grating rod force sensor and using method thereof |
| CN105102921A (en) * | 2012-12-20 | 2015-11-25 | 通用电气公司 | Method and system for monitoring operating conditions in a steam generator |
| CN103644987A (en) * | 2013-11-25 | 2014-03-19 | 中国航空工业集团公司北京长城计量测试技术研究所 | Optical fiber F-P (Fabry-Perot) cavity pressure sensor with temperature self compensation |
Non-Patent Citations (3)
| Title |
|---|
| 向中凡等: "《机电一体化》", 30 April 2013 * |
| 张启福等: "《传感器应用》", 31 March 2015 * |
| 李朋洲等: "蒸汽发生器传热管和支撑隔板间撞击刚度和阻尼研究", 《核动力工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341910A (en) * | 2018-11-09 | 2019-02-15 | 中国核动力研究设计院 | The load cell and system of the impact force between vibrationproof item are restrained in a kind of measurement |
| CN109470387A (en) * | 2018-11-09 | 2019-03-15 | 中国核动力研究设计院 | A kind of load cell and system for restraining the impact force between support plate |
| CN109341910B (en) * | 2018-11-09 | 2020-09-08 | 中国核动力研究设计院 | Force transducer and system for measuring impact force between tube bundle and vibration-proof strip |
| CN114720032A (en) * | 2022-03-27 | 2022-07-08 | 重庆大学 | Optical fiber Fabry-Perot force sensing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106441674A (en) | Fiber-type force measurement sensing system and force measurement method | |
| CN103175639B (en) | The dynamic soil stress sensor of piezoresistance type high-frequency and preparation method | |
| CN205561747U (en) | Reinforced concrete and metal components warp measuring resistance strain displacement sensor | |
| CN101832830B (en) | Flush packaged pressure sensor with high temperature resistance and high frequency response | |
| CN106153978A (en) | Flow velocity based on optical fiber MEMS method amber microcavity test device and method of testing | |
| CN101575847B (en) | Effective stress spade | |
| CN105890679A (en) | Optical fiber Fabry-Perot type flow measuring device with local bending for flow guiding and measuring method | |
| CN104931176B (en) | A kind of piezoelectric type scroll chuck clamps force measuring device | |
| CN109855789A (en) | It is a kind of for monitoring the sensor of underwater small aircraft surface pressing | |
| CN208060071U (en) | A kind of civil engineering fiber grating pore water pressure sensor | |
| CN201043905Y (en) | Optical fiber grating percolation gauge | |
| CN208092125U (en) | Microwave power detector based on clamped beam piezoresistive effect | |
| CN103076049A (en) | Pressure difference type optical fiber flow meter | |
| CN109900414B (en) | Bending moment sensor | |
| CN115524510A (en) | Optical fiber flow velocity sensor based on vernier effect and measuring method thereof | |
| CN104502625A (en) | Three-dimensional muddy water fluctuating velocity instrument | |
| CN106405147A (en) | Ultrasonic transducer wind measurement array and wind measurement method thereof | |
| CN201413209Y (en) | Effective stress shovel | |
| CN202928631U (en) | Force measuring optical fiber flow meter | |
| CN202928626U (en) | Optical fiber vortex flowmeter | |
| CN202693165U (en) | Differential pressure testing device | |
| CN201569468U (en) | Water level data acquisition system | |
| CN201107150Y (en) | System for measuring pressure and total force | |
| CN201464105U (en) | Fiber grating osmometer | |
| KR101218331B1 (en) | Vortex frequency measuring apparatus using piezoelectric film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |
|
| RJ01 | Rejection of invention patent application after publication |