CN106595428A - Vibratory string displacement sensor - Google Patents
Vibratory string displacement sensor Download PDFInfo
- Publication number
- CN106595428A CN106595428A CN201611240768.1A CN201611240768A CN106595428A CN 106595428 A CN106595428 A CN 106595428A CN 201611240768 A CN201611240768 A CN 201611240768A CN 106595428 A CN106595428 A CN 106595428A
- Authority
- CN
- China
- Prior art keywords
- spring
- string
- displacement sensor
- outer protection
- expansion link
- 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.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 3
- 239000010959 steel Substances 0.000 abstract 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a vibratory string displacement sensor which belongs to the subway tunnel engineering field and is applied to the structure safety health monitoring industry. The sensor of the invention comprises a base, a fixed frame, a steel string, an elastic round film, an outer protection pipe, a spring, a telescopic rod, and an end cover. The steel string is riveted onto the elastic film and is installed on the fixed frame. The fully-exerted string is provided with the spring. The other end of the spring is connected with the telescopic rod; the telescopic rod penetrates the end cover; the end cover and the base are welded on the outer protection pipe respectively. According to the invention, a middle elastic round film is added which means the bearing force is greater than that generated from the direct connection of the spring with the vibratory string. Therefore, for the spring with the same stiffness coefficient, a larger measurement range could be obtained. With fewer internal components, the sensor of the invention can be conveniently installed. As the steel string is completely fixed and fastened, it does not go displaced due to long-term force, and therefore, good stability could be achieved.
Description
Technical field
The present invention relates to a kind of vibrating string displacement sensor, belongs to Metro Tunnel field, structure safety and Health is applied to
Monitoring industry.
Background technology
Prior art：Existing vibrating string displacement sensor structure, is to be directly connected to vibratory string retaining element by spring mostly, is passed through
Spring force and the relation and the vibration equation of vibratory string of displacement, indirect displacement.The present invention increases by one in the middle of spring and vibratory string
Individual flexible sheet, spring force is converted into amount of deflection on diaphragm, causes vibratory string tension variation, and by conversion displacement can be measured.This side
The shortcoming of method is high for the processing request of membrana cricovocalis.
The content of the invention
It is an object of the invention to provide a kind of vibrating string displacement sensor, solves the little elastic spring stiffness of vibrating wire sensor
The low problem of the little certainty of measurement of coefficient.Using intermediate transit flexible sheet, larger power can be born and do not destroyed, for
The measurable range ability of spring of same stiffness factor is bigger.String wire whole fixation, does not produce partially because of long-term stress
Move, good stability.The real time on-line monitoring at expansion joint is realized in constructing metro tunnel or operation phase, is subway tunnel structure safety
Monitoring provides effective foundation.
The present invention to achieve these goals, is adopted the following technical scheme that：
A kind of vibrating string displacement sensor, it includes base, fixed mount, string wire, membrana cricovocalis, outer protection tube, spring, expansion link, end
Lid；
String wire riveting has been respectively mounted the other end of spring, spring on flexible sheet, and on fixed mount after the good string that stretches tight
Connection expansion link, expansion link passes through end cap, end cap and base to be respectively welded in outer protection tube.
Further, expansion link is sealed by sealing ring.Expansion link is sealed by sealing ring, and be can move freely.
Further, fixed seat is provided between base and outer protection tube.
When x is subjected to displacement, expansion link is delivered on spring by external force F, and power F on spring scratches membrana cricovocalis generation
Degree deformation, so as to cause the change of tension force on string wire, the amount of deflection that membrana cricovocalis can be just calculated by measuring vibratory string frequency becomes
Change, and the change of the amount of deflection of membrana cricovocalis is directly proportional to its stress, this power is spring stress F. according to spring force and the pass of displacement
It is F=Kx, the change in displacement of expansion link can be calculated.
Beneficial effects of the present invention：
The present invention increases middle spring diaphragm, and it is big that the power born is connected directly between power on vibratory string than spring, therefore for same
The measurable range ability of spring of stiffness factor is bigger；Internals is few, install convenient；String wire whole fixation, not because
Long-term stress and produce skew, good stability.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Specific embodiment
Describe the present invention below in conjunction with the accompanying drawings：
A kind of vibrating string displacement sensor, it includes base 1, fixed mount 3, string wire 4, membrana cricovocalis 5, outer protection tube 6, spring 7, flexible
Bar 8, end cap 10；
The riveting of string wire 4 and on fixed mount 3, has been respectively mounted spring 7, spring 7 on flexible sheet 5 after the good string that stretches tight
Other end connection expansion link 8, expansion link 8 passes through end cap 10, end cap 10 and base 1 to be respectively welded in outer protection tube 6.
Expansion link 8 is sealed by sealing ring 9.
Fixed seat 2 is provided between base 1 and outer protection tube 6.
When x is subjected to displacement, expansion link 8 is delivered on spring 7 by external force F, and power F on spring 7 produces membrana cricovocalis 5
Raw deflection deformation, so as to cause the change of tension force on string wire 4, by measuring vibratory string frequency membrana cricovocalis 5 can be just calculated
Amount of deflection changes, and the change of the amount of deflection of membrana cricovocalis 5 is directly proportional to its stress, and this power is spring stress F.According to the power of spring 7 with
Relation F=Kx of displacement, can calculate the change in displacement of expansion link 8.
Claims (3)
1. a kind of vibrating string displacement sensor, it includes base（1）, fixed mount（3）, string wire（4）, membrana cricovocalis（5）, outer protection tube
（6）, spring（7）, expansion link（8）, end cap（10）；
It is characterized in that：String wire（4）Riveting is in flexible sheet（5）On, and installed in fixed mount（3）On, pacify respectively after the good string that stretches tight
Install spring（7）, spring（7）Other end connection expansion link（8）, expansion link（8）Through end cap（10）, end cap（10）And base
（1）It is respectively welded at outer protection tube（6）On.
2. vibrating string displacement sensor according to claim 1, it is characterised in that：Expansion link（8）By sealing ring（9）It is close
Envelope.
3. vibrating string displacement sensor according to claim 1, it is characterised in that：In base（1）With outer protection tube（6）Between set
It is equipped with fixed seat（2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611240768.1A CN106595428B (en) | 2016-12-29 | 2016-12-29 | Vibrating wire displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611240768.1A CN106595428B (en) | 2016-12-29 | 2016-12-29 | Vibrating wire displacement sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106595428A true CN106595428A (en) | 2017-04-26 |
| CN106595428B CN106595428B (en) | 2024-08-06 |
Family
ID=58603135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611240768.1A Active CN106595428B (en) | 2016-12-29 | 2016-12-29 | Vibrating wire displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106595428B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107781345A (en) * | 2017-12-05 | 2018-03-09 | 华东交通大学 | A kind of Novel magneto-rheological damper of detectable piston displacement |
| CN107882915A (en) * | 2017-12-13 | 2018-04-06 | 华东交通大学 | Built-in range sensor carries out the integrated-type MR damper of displacement detecting |
| CN108151689A (en) * | 2017-11-20 | 2018-06-12 | 中国建筑股份有限公司 | High accuracy displacement sensor |
| CN108195325A (en) * | 2017-12-07 | 2018-06-22 | 国网浙江省电力公司紧水滩水力发电厂 | A kind of hydroelectric power plant's Dam Crack detecting system and method based on crusing robot |
| CN111076685A (en) * | 2019-12-26 | 2020-04-28 | 南京南瑞水利水电科技有限公司 | Vibrating wire type flexible displacement measuring device |
| CN112945426A (en) * | 2021-01-29 | 2021-06-11 | 西南石油大学 | Vibrating wire sensor and stress displacement testing method |
| CN114526847A (en) * | 2021-12-30 | 2022-05-24 | 中铁建设集团(杭州)建设有限公司 | Health monitoring system suitable for large-size space net rack |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990024134A (en) * | 1998-12-10 | 1999-03-25 | 김균식 | Micro Vibration Displacement |
| US20080317401A1 (en) * | 2007-06-22 | 2008-12-25 | An-Bin Huang | Optic fiber bragg grating sensor |
| CN103868582A (en) * | 2014-03-14 | 2014-06-18 | 昆明理工大学 | Optical fiber Bragg grating-based vibrating wire infrasonic wave sensor |
| CN104316006A (en) * | 2014-11-17 | 2015-01-28 | 成都四威高科技产业园有限公司 | Vibration wire displacement sensor |
| KR20150025853A (en) * | 2013-08-30 | 2015-03-11 | 권영억 | assembly for displacement meter |
| CN206724849U (en) * | 2016-12-29 | 2017-12-08 | 江西飞尚科技有限公司 | A kind of vibrating string displacement sensor |
-
2016
- 2016-12-29 CN CN201611240768.1A patent/CN106595428B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990024134A (en) * | 1998-12-10 | 1999-03-25 | 김균식 | Micro Vibration Displacement |
| US20080317401A1 (en) * | 2007-06-22 | 2008-12-25 | An-Bin Huang | Optic fiber bragg grating sensor |
| KR20150025853A (en) * | 2013-08-30 | 2015-03-11 | 권영억 | assembly for displacement meter |
| CN103868582A (en) * | 2014-03-14 | 2014-06-18 | 昆明理工大学 | Optical fiber Bragg grating-based vibrating wire infrasonic wave sensor |
| CN104316006A (en) * | 2014-11-17 | 2015-01-28 | 成都四威高科技产业园有限公司 | Vibration wire displacement sensor |
| CN206724849U (en) * | 2016-12-29 | 2017-12-08 | 江西飞尚科技有限公司 | A kind of vibrating string displacement sensor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151689A (en) * | 2017-11-20 | 2018-06-12 | 中国建筑股份有限公司 | High accuracy displacement sensor |
| CN107781345A (en) * | 2017-12-05 | 2018-03-09 | 华东交通大学 | A kind of Novel magneto-rheological damper of detectable piston displacement |
| CN107781345B (en) * | 2017-12-05 | 2023-12-12 | 华东交通大学 | Magnetorheological damper capable of detecting piston displacement |
| CN108195325A (en) * | 2017-12-07 | 2018-06-22 | 国网浙江省电力公司紧水滩水力发电厂 | A kind of hydroelectric power plant's Dam Crack detecting system and method based on crusing robot |
| CN107882915A (en) * | 2017-12-13 | 2018-04-06 | 华东交通大学 | Built-in range sensor carries out the integrated-type MR damper of displacement detecting |
| CN107882915B (en) * | 2017-12-13 | 2023-12-12 | 华东交通大学 | Integrated magneto-rheological damper with built-in distance sensor for displacement detection |
| CN111076685A (en) * | 2019-12-26 | 2020-04-28 | 南京南瑞水利水电科技有限公司 | Vibrating wire type flexible displacement measuring device |
| CN112945426A (en) * | 2021-01-29 | 2021-06-11 | 西南石油大学 | Vibrating wire sensor and stress displacement testing method |
| CN114526847A (en) * | 2021-12-30 | 2022-05-24 | 中铁建设集团(杭州)建设有限公司 | Health monitoring system suitable for large-size space net rack |
| CN114526847B (en) * | 2021-12-30 | 2024-03-08 | 中铁建设集团(杭州)建设有限公司 | Health monitoring system suitable for large-scale space network frame |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106595428B (en) | 2024-08-06 |
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