CN201569529U - Pull rod tension measuring device for large building - Google Patents
Pull rod tension measuring device for large building Download PDFInfo
- Publication number
- CN201569529U CN201569529U CN2010200552786U CN201020055278U CN201569529U CN 201569529 U CN201569529 U CN 201569529U CN 2010200552786 U CN2010200552786 U CN 2010200552786U CN 201020055278 U CN201020055278 U CN 201020055278U CN 201569529 U CN201569529 U CN 201569529U
- Authority
- CN
- China
- Prior art keywords
- pull bar
- displacement meter
- measured
- pull rod
- support
- 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
Images
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
A pull rod tension measuring device for a large building is characterized by including a reference pull rod which stands in parallel with a pull rod to be measured; one end of the reference pull rod is fixedly connected with the pull rod to be measured; a support is disposed on the pull rod to be measured in front of the other end of the reference pull rod; an expansion joint is maintained between the support and the end face of the reference pull rod. The pull rod tension measuring device also includes a displacement meter one end of which is fixed on the reference pull rod and the other end of which is fixed on the support; and the displacement meter signal line is connected with a computer equipment. Compared with the radioresonance method, the magnetoelastic method and the strain method in prior art, the utility model has advantages of simple structure, convenience, low cost and accurate measuring.
Description
Technical field
The utility model relates to the measurement mechanism of the suffered pulling force sizes of building pull bar such as a kind of suspension bridge, cable-stayed bridge.
Background technology
At present, in buildings such as suspension bridge, cable-stayed bridge, usually adopt the mode of pull bar carrying to support,, important effect is arranged for the safety of assessing these structures to the measurement of the suffered pulling force size of these pull bars.In the prior art, the way of measuring these draw-bar pulls mainly contains:
Method of oscillatory frequency: utilize the vibration frequency of drag-line to estimate its suffered pulling force.But its error is big, is subjected to such environmental effects serious, demarcates more complicated, and often because it can not self-excited oscillation and can't measure.
Magnetic bullet method: utilize magnetoelastic effect to measure pulling force, but it often need just install in advance when building, and measuring error is big, the input cost height.Demarcate same more complicated.
Strain Method: utilize local stress to change and calculate pulling force, but its measuring error is very big, the drag-line of different length also needs to demarcate respectively.
In sum, above-mentioned existing measuring technique, defectives such as all having the process of measurement complexity, measure the cost height, measuring error is big; So how to design a kind of simple, convenient, with low cost, measure accurately the stressed measuring technique of pull bar and become this area technical matters to be solved is arranged.
The utility model content
Technical problem to be solved in the utility model is in order to overcome the prior art above shortcomings, and provide a kind of simple, convenient, with low cost, measure building draw-bar pull measurement mechanism accurately.
For solving the problems of the technologies described above, the utility model has adopted following technical scheme:
A kind of building draw-bar pull measurement mechanism, its characteristics are, comprise one with pull bar to be measured be set up in parallel with reference to pull bar, fixedly connected with pull bar to be measured with reference to pull bar one end, on the pull bar to be measured in reference pull bar other end the place ahead, support is set, support with leave the expansion joint with reference to the pull bar end face; Also include displacement meter, displacement meter one end is fixed on reference on the pull bar, and the other end is fixed on the support, and the displacement meter signal wire links to each other with computer equipment.
This device use principle is: the gap length of measuring the expansion joint before pull bar to be measured uses with displacement meter, measure the gap length at expansion joint after pull bar to be measured uses and installs when stressed again with displacement meter, the difference that computer equipment calculates two measured values by pre-set programs calculates pull bar to be measured according to Hooke's law again and uses consequence to be subjected to the size of pulling force.Adopt displacement meter to measure the expansion joint size in this device, can guarantee the degree of accuracy of measurement result, simultaneously, the displacement meter signal wire is linked to each other with computer equipment, make it not only can measure pull bar to be measured and install the suffered pulling force size in back, and can realize long term monitoring pull bar stressing conditions to be measured.
Hooke's law is one of mechanics philosophy, and it is expressed as: within elastic limit, the deformation of object is with causing that the external force of deformation is directly proportional, and its expression formula is F=KX.In the expression formula, F represents the suffered external force of object; K represents the object coefficient of stiffiness, the elastic force the when coefficient of stiffiness is numerically equal to object elongation unit length; X represents the deformation quantity of object.Computer equipment has been used Hooke's law when calculating, the difference of two measured values that the employing displacement meter obtains is the deformation quantity of measured section of pull bar to be measured, this difference promptly obtains the total deformation quantity of pull bar to be measured divided by measured segment distance of pull bar to be measured and the stressed segment distance ratio of pull bar to be measured, the total deformation quantity of pull bar to be measured be multiply by the pull bar coefficient of stiffiness to be measured can obtain the suffered pulling force size of pull bar to be measured.The measured segment distance of pull bar wherein to be measured is with reference to pull bar length and adds the expansion joint original width, the stressed segment distance of pull bar to be measured is pull bar to be measured and uses length between the point of fixity of two ends, back, and the pull bar coefficient of stiffiness to be measured can be tabled look-up and be obtained or obtain through directly testing.Measuring accuracy is being required when very high, should consider the consistency problem of the coefficient of stiffiness of pull bar, promptly the elongation of pull bar pulling force suffered with it is not linear fully, need test and demarcate the funtcional relationship of match F and X in advance.Functional relation and measured value according to match calculates F then.
As optimization, also be provided with second displacement meter, second displacement meter is identical with the first displacement meter specification and be set up in parallel, and second a displacement meter only end is fixed on reference on pull bar or the support, and the second displacement meter signal wire links to each other with computer equipment.Like this, when this device is used for long term monitoring, second displacement meter can be measured the microdeformation of the displacement meter that causes owing to environmental change itself, the expansion joint variable quantity that first displacement meter is measured deducts the own deflection of displacement meter that second displacement meter measured, obtain the actual change amount at expansion joint, reduce error, further improved measuring accuracy.
Further, two displacement meters all are preferably the fiber optics displacement meter.This is because when using, because rod material is generally metal material, can influence the electromagnetic field around it, and the fiber optics displacement meter belongs to non-electric class displacement meter, can avoid preferably being affected, and further improves measuring accuracy.Certainly, when specifically implementing, also can adopt other non-electric class displacement meter.
Only need twice measurement when this device uses, can calculate the result, have the advantage of simple and fast; Adopting member only is a pull bar to be measured and common stationary installation, displacement measurement instrument etc., need not too big cost can measure, and can rely on computer equipment to monitor for a long time; Measuring principle is wholely set with reference to pull bar and pull bar to be measured according to Hooke's law, offsets relatively so be subjected to environment, temperature etc. to influence error, has guaranteed the accurate of measurement result.So and method of oscillatory frequency, magnetic bullet method, Strain Method are compared in the prior art, that the utility model possesses is simple, convenient, with low cost, measure advantage such as little, the easy realization of on-line monitoring accurate, affected by environment.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
The utility model is particularly suitable for implementing above the building pull bar at suspension bridge, cable-stayed bridge etc., its structure is as shown in Figure 1: comprise one with pull bar 1 to be measured be set up in parallel with reference to pull bar 2, adopt coupling arrangement 3 to fixedly connected with reference to pull bar 2 one ends with pull bar 1 to be measured, coupling arrangement 3 can adopt the common devices that are connected and fixed such as clip, on the pull bar to be measured 1 in reference pull bar 2 other end the place aheads, support 4 is set, support 4 with leave the expansion joint with reference to pull bar 2 end faces; Also include displacement meter 5, displacement meter 5 one ends are fixed on reference on the pull bar 2, and the other end is fixed on the support 4, and the signal wire 6 of displacement meter 5 links to each other with computing machine 7 equipment.During concrete enforcement, it is identical with first displacement meter 5 specification and be set up in parallel also to be provided with second displacement meter, 8, the second displacement meters 8, and second displacement meter 8 an only end is fixed on reference on the pull bar 2, and the signal wire 9 of second displacement meter 8 links to each other with computer equipment 7.Two displacement meters all adopt the fiber optics displacement meter during enforcement.
When this device is implemented, need before using, pull bar 1 to be measured promptly be in place, and measure the gap length that pull bar 1 to be measured uses the front stretching seam with displacement meter 5, measure the gap length at expansion joints after pull bar to be measured 1 uses and installs when stressed again with displacement meter 5, the difference that computer equipment 7 calculates two measured values by pre-set programs calculates pull bar to be measured according to Hooke's law again and uses consequence to be subjected to the size of pulling force.Adopt displacement meter 5 to measure the expansion joint size in this device, can guarantee the degree of accuracy of measurement result, simultaneously, displacement meter signal wire 6 is linked to each other with computer equipment 7, make it not only can measure pull bar 1 to be measured and install the suffered pulling force size in back, and can realize long term monitoring pull bar 1 stressing conditions to be measured.Second displacement meter 8 that is provided with can further reduce the displacement meter measuring error.
The utility model has the following advantages when measuring: 1, measure error is little: this method is owing to can do longlyer with reference to pull bar length, same thickness, the pull bar coefficient of stiffiness that length is bigger are littler, therefore change more obviously when being subjected to same pulling force, the relative error of therefore measuring is littler; 2, marked ratio is more convenient: because the length of contrast material is fixed, the coefficient of stiffiness of object in equal length of therefore measuring can not change, and therefore the material of thickness of the same race only needs once to demarcate; 3, affected by environment little: owing to use same material as the reference pull bar, the variation of the pull bar to be measured that same environmental change causes is with identical with reference to pull bar, can not cause the variation at expansion joint, simultaneously, use two displacement meters to carry out the differential mode computing, overcome the variation that displacement meter takes place because of ambient influnence; 4, possess easy for installation, displacement measuring device can be connected to computer, carry out long-term real time on-line monitoring.
Claims (3)
1. building draw-bar pull measurement mechanism, it is characterized in that, comprise one with pull bar to be measured be set up in parallel with reference to pull bar, fixedly connected with pull bar to be measured with reference to pull bar one end, on the pull bar to be measured in reference pull bar other end the place ahead, support is set, support with leave the expansion joint with reference to the pull bar end face; Also include displacement meter, displacement meter one end is fixed on reference on the pull bar, and the other end is fixed on the support, and the displacement meter signal wire links to each other with computer equipment.
2. building draw-bar pull measurement mechanism as claimed in claim 1, it is characterized in that, also be provided with second displacement meter, second displacement meter is identical with the first displacement meter specification and be set up in parallel, a second displacement meter only end is fixed on reference on pull bar or the support, and the second displacement meter signal wire links to each other with computer equipment.
3. building draw-bar pull measurement mechanism as claimed in claim 2 is characterized in that two displacement meters are the fiber optics displacement meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200552786U CN201569529U (en) | 2010-01-07 | 2010-01-07 | Pull rod tension measuring device for large building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200552786U CN201569529U (en) | 2010-01-07 | 2010-01-07 | Pull rod tension measuring device for large building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201569529U true CN201569529U (en) | 2010-09-01 |
Family
ID=42661822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200552786U Expired - Fee Related CN201569529U (en) | 2010-01-07 | 2010-01-07 | Pull rod tension measuring device for large building |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201569529U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101493A (en) * | 2014-07-15 | 2014-10-15 | 西安电子科技大学 | Telescopic rod reliability test device and method for hoop-truss type deployable antenna |
| CN104266629A (en) * | 2014-10-11 | 2015-01-07 | 上海绿地建设(集团)有限公司 | Suspension cable strain measurement device |
| CN108195670A (en) * | 2017-11-22 | 2018-06-22 | 长沙双合盛企业管理有限公司 | A kind of building tubing sections strength testing device |
| CN109764997A (en) * | 2017-11-10 | 2019-05-17 | 宝沃汽车（中国）有限公司 | Belt tension detection method and belt tension meter |
-
2010
- 2010-01-07 CN CN2010200552786U patent/CN201569529U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101493A (en) * | 2014-07-15 | 2014-10-15 | 西安电子科技大学 | Telescopic rod reliability test device and method for hoop-truss type deployable antenna |
| CN104266629A (en) * | 2014-10-11 | 2015-01-07 | 上海绿地建设(集团)有限公司 | Suspension cable strain measurement device |
| CN109764997A (en) * | 2017-11-10 | 2019-05-17 | 宝沃汽车（中国）有限公司 | Belt tension detection method and belt tension meter |
| CN108195670A (en) * | 2017-11-22 | 2018-06-22 | 长沙双合盛企业管理有限公司 | A kind of building tubing sections strength testing device |
| CN108195670B (en) * | 2017-11-22 | 2021-06-04 | 安徽家骎建设工程有限公司 | Building rope tensile strength testing arrangement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101762351B (en) | Measuring method for tension-rod pull force of large building | |
| Zhang et al. | Structural health monitoring methods of cables in cable-stayed bridge: A review | |
| Li et al. | Development and sensing properties study of FRP–FBG smart stay cable for bridge health monitoring applications | |
| CN104111032B (en) | Fiber bragg grating sensor network based large-scale structure body deformation measurement method | |
| Burgreen et al. | Vibration of rods induced by water in parallel flow | |
| CN102313523B (en) | Sensitivity calibration method of fiber Bragg grating strain sensor | |
| CN105089702B (en) | It is a kind of to monitor the system and method for shield tunnel faulting of slab ends on-line in high precision on a large scale | |
| Luo et al. | Concrete beam crack detection using tapered polymer optical fiber sensors | |
| CN102679900B (en) | A kind of method of the calibration to Fibre Optical Sensor, fiber grating strain parameter | |
| CN201569529U (en) | Pull rod tension measuring device for large building | |
| CN105320596A (en) | Bridge deflection test method based on inclinometers and system thereof | |
| CN204854648U (en) | Distributed optical fiber is used for monitoring devices that panel dam comes to nothing | |
| CN104101307B (en) | A kind of measurement reinforcing bar temperature, fiber grating strain meter of strain simultaneously | |
| CN103278279B (en) | A kind of cable force measurement method and apparatus | |
| Zhang et al. | Research on deflection monitoring for long span cantilever bridge based on optical fiber sensing | |
| Li et al. | Design of an enhanced sensitivity FBG strain sensor and application in highway bridge engineering | |
| CN111006603B (en) | Steel bar stress strain gauge | |
| Zheng et al. | Theoretical and experimental study on fiber-optic displacement sensor with bowknot bending modulation | |
| Sun et al. | Temperature self-compensating and high-sensitivity FBG inclination sensor based on the sliding mass principle | |
| CN103047939B (en) | Fiber Bragg grating strain sensor engineering adaptability evaluation method | |
| Nawrot et al. | Mechanical strain-amplifying transducer for fiber Bragg grating sensors with applications in structural health monitoring | |
| CN202582503U (en) | Transmission type grating strainmeter | |
| CN203443711U (en) | Fixture vibrating string-type fiber rib tension measuring device | |
| CN202582504U (en) | Reflective grating strainometer | |
| CN207923332U (en) | A kind of round-the-clock cable force measurement device equipped with dog-ear otic placode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20120107 |