CN105180887A - Wide span beam deflection deformation measuring method - Google Patents
Wide span beam deflection deformation measuring method Download PDFInfo
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- CN105180887A CN105180887A CN201510644694.7A CN201510644694A CN105180887A CN 105180887 A CN105180887 A CN 105180887A CN 201510644694 A CN201510644694 A CN 201510644694A CN 105180887 A CN105180887 A CN 105180887A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 46
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention provides a wide span beam deflection deformation measuring method, comprising setting a displacement sensor parallel with an object to be detected, and a displacement sensor perpendicular to the object to be detected at lower ends of the object to be detected; fixing the displacement sensor parallel with the object to be detected, and moving the displacement sensor perpendicular to the object to be detected, wherein the data of the displacement sensor parallel with the object to be detected is the horizontal ordinate value of each data points of a deflection curve, used for determining the X-axis ordinate value of a current measuring point, and the data of the displacement sensor perpendicular to the object to be detected is the longitudinal coordinate value of each data point of the deflection curve; a horizontal ordinate value and a longitudinal coordinate value form a data point on the deflection curve, used for measuring the deflection deformation value measured by the current measuring point; and a computer obtaining and fitting the data measured by the two sensors to draft a continuous deflection curve. The method realizes deflection curve accurate fitting through the two sensors, has the characteristics of low measurement cost and high test precision, and can realize continuous measurement at span intervals.
Description
Technical field
The present invention relates to deflection deformation measuring method, particularly relate to a kind of for deflection deformation measuring method after long-span beams stand under load.
Background technology
Two ends freely-supported or clamped long-span beam conducted oneself with dignity or external applied load effect after, deflection deformation can occur, the size of deflection deformation amount depends on the rigidity of crossbeam.This rigidity value is one of important parameter of reflect structure part mechanical property.In order to measure the rigidity of longspan structure part, can be passed judgment on by the size measuring deflection deformation amount.Such as automotive body structure is after being subject to vertical load, and chassis runner deflection deformation can occur.In order to study the Static stiffness performance of body structure, need the deflection curve measuring longeron.
Existing measuring method arranges the displacement transducer of some, by measuring the deflection of these discrete measuring points, simulates the deflection curve of longeron.This measuring method needs to arrange a fairly large number of displacement transducer, and the number of sensors being limited to layout is how many, accurately cannot obtain the deflection curve of chassis runner.
Summary of the invention
The object of the present invention is to provide and a kind ofly measure that cost is low, measuring accuracy is high, deflection deformation measuring method that in span interval, continuity is measured and pick-up unit can be realized, a large amount of displacement transducer need be arranged to solve existing method and measure the inaccurate problem of deflection curve obtained.
In order to achieve the above object, technical scheme of the present invention is as follows:
A kind of long-span beams deflection deformation measuring method, described method arranges displacement transducer and a displacement transducer perpendicular to measurand being parallel to measurand, the displacement transducer being parallel to measurand is fixed, the mobile displacement transducer perpendicular to measurand, the data being parallel to the displacement transducer of measurand are the abscissa value of each data point on deflection curve, for judging the X-axis coordinate figure of current measuring point, displacement transducer data perpendicular to measurand are the ordinate value of each data point on deflection curve, namely two coordinate figures constitute each data point on deflection curve, for measuring the deflection deformation value that current measuring point records, computing machine obtains the data matching that two sensors record, continuous print deflection curve can be drawn.
The method achieves the accurate matching of deflection curve by two displacement transducers, and obtaining traditional measurement method needs numerous displacement transducer just can getable result, and measure cost low, measuring accuracy is high, can realize continuity in span interval and measure.
Accompanying drawing explanation
Fig. 1 is the measuring principle figure of the method for the invention; Wherein 1 is measurand, and 2 for being parallel to the displacement transducer of measurand, and 3 is the displacement transducer perpendicular to measurand, and 4 is the deflection curve between AB measuring point.
Fig. 2 is a kind of full-automatic detection apparatus realizing this method; 5 be drive motor, 6 be wherein limiting photoelectric switch, 7 be plate washer, 8 be guide rail, 9 be ball-screw, 10 for movable working platform.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing:
As shown in Figure 1, measurand 1 is subject to the effect of external applied load F, deflection deformation can be there is, in order to measure the deflection curve between span AB, the method of the invention arranges displacement transducer 2 and a displacement transducer 3 perpendicular to measurand being parallel to measurand, the displacement transducer 2 being parallel to measurand is fixed on A point, the mobile sensor 3 perpendicular to measurand between A to B point, now, the displacement transducer 2 being parallel to measurand can judge the current location of the displacement transducer 3 perpendicular to measurand, the deflection deformation amount of current measuring point C measured by displacement transducer 3 perpendicular to measurand.The data recorded by sensor 2 and 3, to returning computing machine, are drawn in XOY coordinate, the deflection curve 4 between the AB measuring point that can obtain measurand 1.
For the inventive method can adopt a kind of full automatic measurement mechanism to realize.As shown in Figure 2, device is by drive motor 5, guide rail 8, ball-screw 9, movable working platform 10, first displacement transducer 2, second displacement sensor 3 and computing machine; Drive motor 5 connects driving ball-screw 9, movable working platform 10 is arranged on ball-screw 9, and coordinate with guide rail 8, can move along guide rail, first displacement transducer 2 is fixed on the end of guide rail 8, be parallel to measurand to install, second displacement sensor 3 is fixed on movable working platform 10, perpendicular to the installation of measurand; First displacement transducer 2 is connected with Computer signal with second displacement sensor 3.
This device can realize the automatic movement of the displacement transducer 3 perpendicular to measurand, and during work, computing machine controls drive motor 5 and rotates, and drives ball-screw 9 to rotate, thus drives movable working platform 10 moving linearly on guide rail 8.During measurement, the data that the displacement transducer 2 being parallel to measurand returns computing machine are the abscissa value of each data point on deflection curve 4; The data that displacement transducer 3 perpendicular to measurand returns computing machine are the ordinate value of each data point on deflection curve 4; Namely both constitute each data point on deflection curve 4.During work, in the slow moving process of movable working platform 10, sensor 2 and 3 does not stop, to computing machine return measurement data, planimetric coordinates XOY to draw these coordinate points, matching can obtain deflection curve 4 accurately.In order to the deflection curve 4 between Measurement accuracy span AB, and the safety of warranty test equipment, be provided with baffle plate 7 at guide rail 8 two ends, two end-stopping plates 7 are respectively provided with a limiting photoelectric switch 6, the induction region limit point of limiting photoelectric switch 6 is adjusted to the A point and B point of measuring span.During measurement, when movable working platform 10 arrives two limit point A points and the B point of surveying range, and enter the induction region of limiting photoelectric switch 6, optoelectronic switch output switch amount signal, this signal is transfused to drive motor controller, thus control drive motor 5 stops operating.
Claims (3)
1. a long-span beam deflection deformation measuring method, described method arranges displacement transducer and a displacement transducer perpendicular to measurand being parallel to measurand, the displacement transducer being parallel to measurand is fixed, the mobile displacement transducer perpendicular to measurand, the data being parallel to the displacement transducer of measurand are the abscissa value of each data point on deflection curve, for judging the X-axis coordinate figure of current measuring point, displacement transducer data perpendicular to measurand are the ordinate value of each data point on deflection curve, namely two coordinate figures constitute each data point on deflection curve, for measuring the deflection deformation value that current measuring point records, computing machine obtains the data matching that two sensors record, continuous print deflection curve can be drawn.
2. a long-span beam deflection deformation measurement mechanism, it is characterized in that, device is by drive motor (5), guide rail (8), ball-screw (9), movable working platform (10), the first displacement transducer (2), second displacement sensor (3) and computing machine; Drive motor (5) connects driving ball-screw (9), movable working platform (10) is arranged on ball-screw (9), and coordinate with guide rail (8), can move along guide rail, first displacement transducer (2) is fixed on the end of guide rail (8), be parallel to measurand to install, second displacement sensor (3) is fixed on movable working platform (10), perpendicular to the installation of measurand; First displacement transducer (2) is connected with Computer signal with second displacement sensor (3).
3. long-span beam deflection deformation measurement mechanism according to claim 1, it is characterized in that, also comprise limiting photoelectric switch (6) and plate washer (7), at guide rail (8) two ends, baffle plate (7) is installed, baffle plate (7) is respectively provided with a limiting photoelectric switch (6), the induction region limit point of limiting photoelectric switch (6) is adjusted to the A point and B point of measuring span, the on-off model that limiting photoelectric switch (6) exports is transfused to drive motor controller, thus control drive motor (5) stops operating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510644694.7A CN105180887A (en) | 2015-10-08 | 2015-10-08 | Wide span beam deflection deformation measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510644694.7A CN105180887A (en) | 2015-10-08 | 2015-10-08 | Wide span beam deflection deformation measuring method |
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| Publication Number | Publication Date |
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| CN105180887A true CN105180887A (en) | 2015-12-23 |
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| CN201510644694.7A Pending CN105180887A (en) | 2015-10-08 | 2015-10-08 | Wide span beam deflection deformation measuring method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916355A (en) * | 2019-04-04 | 2019-06-21 | 南京熊猫电子股份有限公司 | Liquid crystal glass thickness online detection device |
| CN110360927A (en) * | 2019-07-24 | 2019-10-22 | 西南交通大学 | One kind is grown up component amount of deflection rapid measurement device and measurement method |
| CN110986817A (en) * | 2019-11-22 | 2020-04-10 | 北京交通大学 | Device and method for initial alignment measurement of temporary member |
| CN113533021A (en) * | 2021-06-28 | 2021-10-22 | 王志 | Vertical loading device for overall static performance of horizontal lifeline device |
Citations (4)
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|---|---|---|---|---|
| CN201653691U (en) * | 2010-03-26 | 2010-11-24 | 沈阳航空工业学院 | A bearing dynamic stiffness testing device |
| CN103175483A (en) * | 2013-03-13 | 2013-06-26 | 哈尔滨工业大学 | Handheld device and method for measuring faceplate warpage of cement roads |
| CN103759695A (en) * | 2013-12-27 | 2014-04-30 | 中国铁道科学研究院金属及化学研究所 | Detecting device and method for automatically measuring outline of steel rail |
| CN104215195A (en) * | 2014-09-23 | 2014-12-17 | 苏州精创光学仪器有限公司 | Glass panel automatic warping degree measurement instrument |
-
2015
- 2015-10-08 CN CN201510644694.7A patent/CN105180887A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201653691U (en) * | 2010-03-26 | 2010-11-24 | 沈阳航空工业学院 | A bearing dynamic stiffness testing device |
| CN103175483A (en) * | 2013-03-13 | 2013-06-26 | 哈尔滨工业大学 | Handheld device and method for measuring faceplate warpage of cement roads |
| CN103759695A (en) * | 2013-12-27 | 2014-04-30 | 中国铁道科学研究院金属及化学研究所 | Detecting device and method for automatically measuring outline of steel rail |
| CN104215195A (en) * | 2014-09-23 | 2014-12-17 | 苏州精创光学仪器有限公司 | Glass panel automatic warping degree measurement instrument |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916355A (en) * | 2019-04-04 | 2019-06-21 | 南京熊猫电子股份有限公司 | Liquid crystal glass thickness online detection device |
| CN110360927A (en) * | 2019-07-24 | 2019-10-22 | 西南交通大学 | One kind is grown up component amount of deflection rapid measurement device and measurement method |
| CN110986817A (en) * | 2019-11-22 | 2020-04-10 | 北京交通大学 | Device and method for initial alignment measurement of temporary member |
| CN110986817B (en) * | 2019-11-22 | 2021-03-09 | 北京交通大学 | A method for initial alignment measurement of temporary members |
| CN113533021A (en) * | 2021-06-28 | 2021-10-22 | 王志 | Vertical loading device for overall static performance of horizontal lifeline device |
| CN113533021B (en) * | 2021-06-28 | 2024-06-04 | 王志 | Vertical loading device for overall static performance of horizontal lifeline device |
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Application publication date: 20151223 |