CN104457656B - Displacement measurement device with temperature and tensile force correcting function and displacement measurement method - Google Patents
Displacement measurement device with temperature and tensile force correcting function and displacement measurement method Download PDFInfo
- Publication number
- CN104457656B CN104457656B CN201410717163.1A CN201410717163A CN104457656B CN 104457656 B CN104457656 B CN 104457656B CN 201410717163 A CN201410717163 A CN 201410717163A CN 104457656 B CN104457656 B CN 104457656B
- Authority
- CN
- China
- Prior art keywords
- displacement
- steel wire
- wire rope
- temperature
- transducer
- 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
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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
Abstract
The invention relates to a displacement measurement device with a temperature and tensile force correcting function and a displacement measurement method. A displacement sensor is fixed on a base of a supporting structure through a force sensor, a pulley is hung on the top of the supporting structure, a steel wire rope is connected with the displacement sensor and a measuring point through the pulley, and thermocouples are arranged on the steel wire rope between the pulley and the measuring point; the displacement sensor, the force sensor and the thermocouples are connected to a paperless recorder through data lines, and therefore when displacement is measured, tensile force on the steel wire rope and temperature distribution along the steel wire rope are measured; a correcting formula can be used for carrying out temperature correction and tensile force correction. Compared with an existing displacement measuring device, deformation, caused by external temperature and tensile force, of the steel wire rope can be corrected, and more precise displacement measuring data can be obtained; the direction of the measuring point is not limited, and measuring difficulty is lowered. The overall structure is reliable, the principle is clear, and operability is high.
Description
Technical field
The present invention relates to displacement measuring device, carry temperature used in building structure fire resistance test particularly to one kind
Displacement measuring device and method with pulling force debugging functions.
Background technology
Existing displacement measuring device is substantially and displacement transducer is fixed on base, then passes through with the point needing measurement
Steel wire rope or other flexible connections are joined directly together.When measuring point is mobile, passed by steel wire rope or other flexible connection band logical displacements
The measuring mechanism of sensor moves, and records the mobile numerical value of measuring point, and is read numerical value to recording instrument without paper by data line transfer
Or storage, as shown in Figure 1.When measuring point surrounding is higher, steel wire rope can produce thermal expansion, thus affecting measurement result.Existing
There is device that this cannot be modified.In order to improve certainty of measurement, typically all steel wire rope can be made to keep tensioning by applying pulling force,
This pulling force also can make steel wire rope stretch, thus affecting measurement result, existing apparatus also cannot be modified to this.Displacement sensing
The measuring mechanism only one of which moving direction of device, existing apparatus need measuring mechanism approximate alignment measuring point when using, to making
With making troubles.
Content of the invention
In view of the deficiency that existing displacement measuring device exists, the present invention provide a kind of with temperature and pulling force debugging functions
Displacement measuring device and method.Can temperature impact and pulling force be affected to be modified using this device and measuring point can be in office
What angle all can measure.
The present invention for achieving the above object, be employed technical scheme comprise that：A kind of with temperature and pulling force debugging functions
Displacement measuring device it is characterised in that：Including hook/magnetic crochet, supporting construction, steel wire rope, displacement transducer, force transducer, cunning
Wheel, recording instrument without paper data line, described supporting construction is made up of the support bar that one piece of base plate and two root beads are connected on base plate, and two
Root support bar top is welded mutually, and is fixedly connected pulley；A force transducer is fixed in the base plate central authorities of supporting construction, and power senses
The measuring surface of device fixes a displacement transducer；The measurement end of displacement transducer connects a steel wire rope；Steel wire rope is in pulley
Pass through, be fixed to by hook/magnetic crochet on the point needing measurement；Steel wire rope is at hook/magnetic crochet to pulley direction arranged for interval
Several thermocouples K0～Kn, several thermocouples K0～Kn, displacement transducer and force transducer be coupled with no by data wire
On paper monitor.
The measuring method adopting with temperature and the displacement measuring device of pulling force debugging functions of the present invention, its feature
It is：It is first turned on recording instrument without paper and debugs it is ensured that displacement transducer, force transducer and thermocouple running are normal, open no
The writing function of paper monitor, the data of start recording displacement transducer, force transducer and thermocouple, after off-test, will remember
The data of record imports computer from recording instrument without paper 7, and measurement data is entered with trip temperature and pulling force correction：
Initial time ambient temperature known to hypothesis is T；Steel wire rope overall length is L, a diameter of b, and elastic modelling quantity is E, and line heat is swollen
Swollen coefficient is；In t, actual displacement is d, and the shift value that displacement transducer directly records is d`, and pulling force sensor records
Pulling force is F, thermocouple K0、K1、K2、K3…KnThe temperature recording is respectively T0、T1、T2、T3... Tn；According to t steel wire rope not
With temperature and the lineoutofservice signal pull of position, the shift value d` that displacement transducer is directly recorded is modified, wherein to steel wire rope
L1—LnIn any one section of LiTemperature correction according to below equation：
---------------------（1）
Pulling force correction is carried out to whole section of steel wire rope, correction formula is：
-------------------------（2）
Then temperature and pulling force impact are modified, foundation（1）Formula and（2）The actual displacement that formula obtains is：
------（3）
Trip temperature and pulling force correction are entered in displacement for each moment, according to formula（3）Can get the accurate of each moment measuring point
Shift value.
The invention has the beneficial effects as follows：While measuring displacement, it is possible to achieve the measurement to steel wire rope each several part temperature,
Such that it is able to measurement result is carried out with temperature adjustmemt, offset the impact to certainty of measurement causing because of ambient temperature；Meanwhile,
Can realize, by measuring the pulling force suffered by displacement transducer, obtaining the pulling force that steel wire rope receives, thus carrying out to measurement result
Pulling force correction, offsets the impact to certainty of measurement causing because of pulling force.Steel wire rope by the pulley at supporting construction top again with
Measuring point is connected, can be without the measuring point of any angle direction of adjustment displacement transducer direction direct measurement.As can be seen here, relatively
In existing displacement measuring device, can temperature and pulling force lead to external world steel wire rope deformation be modified, thus obtaining more smart
True displacement measurement data；Direction residing for measuring point is unrestricted simultaneously, reduces the difficulty of measurement.Overall structure is reliable, former
Reason is clearly, workable.
Brief description
Fig. 1 is existing displacement measuring device structural representation；
Fig. 2 is the displacement measuring device structural representation of the present invention.
Specific embodiment
In order to become apparent from understanding the present invention, describe in detail below in conjunction with drawings and Examples.
As shown in Fig. 2 the displacement measuring device with temperature and pulling force debugging functions includes hook/magnetic crochet 1, supporting construction
2nd, steel wire rope 3, displacement transducer 4, force transducer 5, pulley 6, recording instrument without paper 7 data line 8.Supporting construction 2 is steady by playing
The base plate 2.1 of fixed, fixing force transducer 5 support and two support bar 2.2 two parts compositions playing fixed block 6.Power passes
Sensor 5 is fixed on the base plate 2.1 of supporting construction 2 by support, and its measuring surface passes through support fixed displacement sensor 4.Displacement
The measuring mechanism connecting steel wire ropes 3 of sensor 4, steel wire penetrating pulley 6, by hook/magnetic crochet 1 and the point needing measurement displacement
Connect.The moving direction of the measuring mechanism of displacement transducer 4 is directed at the direction of pulley 6.Steel wire rope from pulley 6 to one section of measuring point
3 length are L, in the contact point cloth number of the setting to 0 thermocouple K of steel wire rope 3 and hook/magnetic crochet0, then along No. 0 thermocouple K0To pulley side
To interval L1Distance No. 1 thermocouple K of arrangement1, it is spaced L2Distance No. 2 thermocouple K of arrangement2, it is spaced L3Distance No. 3 thermocouples of arrangement
K3, by that analogy, until interval LnDistance arrangement n thermocouple Kn.Whole thermocouple K0、K1、K2、K3…Kn, displacement transducer
4 and force transducer 5 recording instrument without paper 7 is coupled with by data wire 8.
This device arranges thermocouple along the line in the steel wire rope connecting displacement transducer and measuring point, layout points of thermocouple and close
Degree determines according to actual environment situation：When ambient conditions is complicated, temperature is higher, it is more intensive that thermocouple should be arranged；When
When ambient conditions is simple, temperature is relatively low, what thermocouple can be arranged becomes estranged.While measuring displacement, obtain steel wire rope
Temperature Distribution along the line, thus be modified on temperature impact by calculating.Connect one in the support section of displacement transducer
Force transducer, while measuring displacement, also can get the pulling force suffered by displacement transducer, thus obtaining drawing suffered by steel wire rope
Power, be can achieve by calculating and pulling force impact is modified.Design a kind of supporting construction, the fixing pulling force sensor of bottom center and
Displacement transducer, a pulley is fixed at top.The measuring mechanism movement side be aligned pulley of displacement transducer, will connect displacement sensing
The steel wire penetrating pulley of device and measuring point, reconnects measuring point, so no matter any angle residing for measuring point, all can ensure steel wire rope with
The moving direction of displacement sensor mechanism junction meets displacement transducer and requires.
According to existing displacement measuring device at present, do not account for temperature and the impact of pulling force, then displacement d meets following public affairs
Formula：D=d`.The present invention can be direct to displacement transducer according to the temperature of t steel wire rope diverse location and lineoutofservice signal pull
Measured value d` is modified.
When the building structure fire resistance carrying out fire-fighting domain is tested, typically test specimen to be measured is placed in Special test dress
Put, in the face of testing equipment, testing equipment is according to relevant criterion simulated fire situation for a part for test specimen；Tested point is arranged in examination
The another side of part although not directly facing testing equipment, but because, during test, the temperature within testing equipment is very high（Highest
Up to 1200 DEG C）, due to the closure not reason such as tight, test piece deformation, the ambient temperature of tested point and surrounding is typically likely to reach
More than 300 DEG C.
In actual test, the condition of given experiment is：9 DEG C of original ambient temperature, measurement line length is 6m, and material is stainless
Steel wire, a diameter of 0.8mm；Thermocouple adopts OMEGA GG-K-30-SLE thermocouple；The fixing tensile force of steel wire rope is 10N, calibration
It is wide land 150mm digital display with slide gauge.Because pulling force counterweight is realized loading in test, remain 10N, therefore not to drawing
Power is modified.
Environment initial temperature is measured as 60 DEG C, and first point of given actual displacement is 1mm；After numerical stability to be measured, look into
Obtain measurement data as shown in table 1.
Data after table 1 temperature adjustmemt
According to the correction formula proposing in technical scheme, temperature adjustmemt is carried out to each section of displacement measurement.Revise
The results are shown in Table 2.
2 first points of each section of correction results of table
According to the method described above all measured values are modified, result is as shown in table 3.
Data after table 3 temperature adjustmemt
As can be seen that passing through temperature adjustmemt from above-mentioned test, the average certainty of measurement that improves is about 0.1mm, and the present invention is former
Clear clear, calculating simplicity, there is practical value.
According to the above description, can achieve the present invention program in conjunction with industry practical situation.
Claims (2)
1. a kind of displacement measuring device with temperature and pulling force debugging functions it is characterised in that：Including hook/magnetic crochet（1）,
Support structure（2）, steel wire rope（3）, displacement transducer（4）, force transducer（5）, pulley（6）, recording instrument without paper（7）Data line
（8）, described supporting construction（2）By one piece of base plate（2.1）It is connected on base plate with two root beads（2.1）On support bar（2.2）Constitute, two
Root support bar（2.2）Top is welded mutually, and is fixedly connected pulley（6）；Supporting construction（2）Base plate（2.1）Central authorities fix one
Platform force transducer（5）, force transducer（5）Measuring surface fix a displacement transducer（4）；Displacement transducer（4）Measurement end
Connect a steel wire rope（3）；Steel wire rope（3）In pulley（6）In pass through, by hook/magnetic crochet（1）It is fixed to the point needing measurement
On；Steel wire rope（3）In hook/magnetic crochet（1）Place is to pulley direction arranged for interval several thermocouples K0～Kn, several thermocouples
K0～Kn, displacement transducer（4）And force transducer（5）By data wire（8）It is coupled with recording instrument without paper（7）On.
2. a kind of measurement side using the displacement measuring device carrying temperature and pulling force debugging functions as claimed in claim 1
Method it is characterised in that：It is first turned on recording instrument without paper and debug it is ensured that displacement transducer, force transducer and thermocouple just operate
Often, the writing function of recording instrument without paper, the data of start recording displacement transducer, force transducer and thermocouple, test knot are opened
Shu Hou, the data of record is imported computer from recording instrument without paper, measurement data is entered with trip temperature and pulling force correction：
Initial time ambient temperature known to hypothesis is T；Steel wire rope overall length is L, a diameter of b, and elastic modelling quantity is E, linear thermal expansion system
Number is α；In t, actual displacement is d, and the shift value that displacement transducer directly records is d`, the pulling force that pulling force sensor records
For F, thermocouple K0、K1、K2、K3、…、KnThe temperature recording is respectively T0、T1、T2、T3..., Tn；According to t steel wire rope not
With temperature and the lineoutofservice signal pull of position, the shift value d` that displacement transducer is directly recorded is modified, wherein to steel wire rope
L1—LnIn any one section of LiTemperature correction according to below equation：
---------------------（1）
Pulling force correction is carried out to whole section of steel wire rope, correction formula is：
-------------------------（2）
Then temperature and pulling force impact are modified, foundation（1）Formula and（2）The actual displacement that formula obtains is：
------（3）
Trip temperature and pulling force correction are entered in displacement for each moment, according to formula（3）Can get the accurate of each moment measuring point
Shift value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410717163.1A CN104457656B (en) | 2014-12-02 | 2014-12-02 | Displacement measurement device with temperature and tensile force correcting function and displacement measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410717163.1A CN104457656B (en) | 2014-12-02 | 2014-12-02 | Displacement measurement device with temperature and tensile force correcting function and displacement measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104457656A CN104457656A (en) | 2015-03-25 |
| CN104457656B true CN104457656B (en) | 2017-02-22 |
Family
ID=52904093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410717163.1A Expired - Fee Related CN104457656B (en) | 2014-12-02 | 2014-12-02 | Displacement measurement device with temperature and tensile force correcting function and displacement measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104457656B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610526B (en) * | 2018-12-04 | 2020-09-08 | 中铁大桥局第七工程有限公司 | Monofilament temperature-change-resistant building enclosure monitoring device and building enclosure displacement measurement method |
| CN114250812B (en) * | 2021-11-30 | 2023-07-14 | 中铁大桥局集团第五工程有限公司 | Method for measuring relative distance of underwater steel pipe pile |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2651741Y (en) * | 2003-11-08 | 2004-10-27 | 陕西科技大学 | Precision leather shrinkage temperature measuring apparatus |
| CN2859509Y (en) * | 2005-10-13 | 2007-01-17 | 河南科技大学 | Automatic data acquisition stretching creep testing device |
| CN101271098A (en) * | 2007-03-21 | 2008-09-24 | 中国科学院地理科学与资源研究所 | Method and device for measuring sedimentation and volume weight of compost pile |
| CN105122968B (en) * | 2008-06-27 | 2013-01-02 | 上海卫星工程研究所 | Vacuum environment lower member measuring system for thermal deformation and measuring method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001280958A (en) * | 2000-03-31 | 2001-10-10 | Hitachi Plant Eng & Constr Co Ltd | Positioning method for structure and displacement measuring instrument |
-
2014
- 2014-12-02 CN CN201410717163.1A patent/CN104457656B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2651741Y (en) * | 2003-11-08 | 2004-10-27 | 陕西科技大学 | Precision leather shrinkage temperature measuring apparatus |
| CN2859509Y (en) * | 2005-10-13 | 2007-01-17 | 河南科技大学 | Automatic data acquisition stretching creep testing device |
| CN101271098A (en) * | 2007-03-21 | 2008-09-24 | 中国科学院地理科学与资源研究所 | Method and device for measuring sedimentation and volume weight of compost pile |
| CN105122968B (en) * | 2008-06-27 | 2013-01-02 | 上海卫星工程研究所 | Vacuum environment lower member measuring system for thermal deformation and measuring method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104457656A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104457656B (en) | Displacement measurement device with temperature and tensile force correcting function and displacement measurement method | |
| CN104048736B (en) | The test system of fuel sensor | |
| CN107039092B (en) | Fuel rod detection device | |
| CN107255534B (en) | A kind of error measurement method of Thermistor Temperature Measurement instrument | |
| CN104121878A (en) | Electric actuator clearance testing method | |
| Merlet | An experimental investigation of extra measurements for solving the direct kinematics of cable-driven parallel robots | |
| CN107255453A (en) | A kind of industrial robot joint decelerator eccentric shaft diameter measurement device and method | |
| CN104344799A (en) | Space displacement measurement device and method adopting multiple displacement sensors | |
| JP7110549B2 (en) | sensor device | |
| CN106404239A (en) | Liquefied natural gas storage tank inner tank precooling temperature and stress test system | |
| CN206787976U (en) | A kind of roll-down type viscosity self-operated measuring unit | |
| CN206961529U (en) | Fuel rod detection device | |
| CN206161429U (en) | Internal force is measured and calibration device thereof | |
| CN102305691B (en) | Method and system for testing weight balance of racket and ball arm | |
| CN106403798A (en) | Device and system for measuring internal displacement of concrete and installation method of system | |
| KR101184400B1 (en) | Anemovane | |
| CN206311240U (en) | Light fixture testing equipment calibrating installation | |
| Hayashi et al. | Evaluation of newly developed 50 N dead-weight type force standard machine using tuning-fork type force transducer | |
| CN107726966B (en) | Omega-shaped spring strip symmetry balance needle type rapid detection tool and detection method | |
| CN208588707U (en) | A kind of ultrasonic test bracket | |
| KR101082327B1 (en) | Torque sensor test bed | |
| CN101968494B (en) | Wind velocity field test device and method for outdoor unit of air conditioner | |
| CN107462143B (en) | A kind of Bidirectional displacement meter | |
| CN107741209A (en) | The correction for temperature effect method of thread-vibration type device for sensing displacement | |
| CN206369528U (en) | A kind of apparatus and system for measuring inside concrete displacement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Bai Bin Inventor after: Wang Diejie Inventor after: Dong Xuejing Inventor after: Li Tao Inventor before: Bai Bin Inventor before: Dong Xuejing Inventor before: Wang Diejie Inventor before: Li Tao |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 110 Wei Jinnan Road, Nankai District, Tianjin Patentee after: TIANJIN FIRE Research Institute OF MEM Address before: 300 000 No. 110 Weijin South Road, Nankai District, Tianjin Patentee before: TIANJIN FIRE Research Institute |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20211202 |