CN110749296A - Crack three-direction relative displacement measuring device with sensor and measuring method thereof - Google Patents
Crack three-direction relative displacement measuring device with sensor and measuring method thereof Download PDFInfo
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- CN110749296A CN110749296A CN201911022255.7A CN201911022255A CN110749296A CN 110749296 A CN110749296 A CN 110749296A CN 201911022255 A CN201911022255 A CN 201911022255A CN 110749296 A CN110749296 A CN 110749296A
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- 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
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- 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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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- 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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a crack three-dimensional relative displacement measuring device with a sensor and a measuring method thereof, wherein the device comprises a left base, a right base, a cantilever member, a sensor fixing frame and a sensing block, wherein the left base is provided with the sensing block; an inclined strut is arranged between the right base and the cantilever component, the sensor fixing frame and the induction block are formed by connecting three baffles in pairs, the planes of the three baffles are vertical to each other, and the three baffles of the sensor fixing frame and the three baffles of the induction block are opposite to each other in the left-right direction, the front-back direction and the up-down direction; the sensor fixing frame is provided with a first displacement sensor, a second displacement sensor and a third displacement sensor, the sensors face to different directions and are mutually perpendicular, and the relative displacements in the three directions are respectively tested. Because cantilever member length is adjustable and adopt the sensor test, consequently the device measurement accuracy is high and have simple structure, the advantage of being convenient for operate.
Description
Technical Field
The invention relates to the field of engineering measurement, in particular to a crack three-dimensional relative displacement measuring device with a sensor and a measuring method thereof.
Background
Expansion joints are often arranged in the concrete structure design and construction process, and cracks are also generated in the structure use process due to various reasons. The deformation of these cracks is an important factor in the safety and stability of the structure. The accurate measurement of the deformation of the crack is of great significance to the maintenance of the structure.
Patent document CN205246041U discloses a three-way slit measuring device with displacement sensors arranged in parallel, which comprises a sensor fixing frame, three displacement sensors, a measuring seat and three contact surfaces. The sensor is fixed through the sensor mount, and the measuring staff is connected to the sensor, and three contact surface sets up side by side on the side seat, and is positive 45 degrees, 90 and side 45 contained angles respectively with the measuring seat plane. The measuring rod is in contact with the contact surface, and when the crack changes, the sensor acquires three-way displacement data. In this patent, when the crack produced three-dimensional displacement, the removal of measuring staff makes the data that the sensor measured not unidirectional's displacement, and easily leads to the wearing and tearing of measuring staff in the contact measurement process of measuring staff and contact surface to destroy.
Patent document CN108593009A discloses a measuring device for identifying a three-way displacement of a deformation joint or a crack and a new crack, which comprises a fixed frame, a displacement block, three displacement meters, a camera, a fixed plate and a camera. The measuring device can accurately measure the three-dimensional displacement of the deformation joint or the crack, but has complex structure and higher cost, and is not suitable for construction sites with poor site environment conditions.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a device and a method for measuring the three-dimensional relative displacement of a structural crack with a sensor.
In order to achieve the purpose, the invention adopts the following solution:
a crack three-direction relative displacement measuring device with a sensor comprises a left base, a right base, a cantilever member, a sensor fixing frame and an induction block; the left base is provided with an induction block, the right base is connected with one end of a cantilever member, and the other end of the cantilever member is connected with a sensor fixing frame; an inclined strut is further arranged between the right base and the cantilever member; the cantilever member consists of two thin-wall rectangular pipes with different sizes, the rectangular pipe with smaller section size can be retracted into the other rectangular pipe, and the length of the rectangular pipe can be adjusted; the sensor fixing frame and the induction block are formed by connecting three baffles in pairs, the planes of the three baffles are perpendicular to each other, and the three baffles of the sensor fixing frame and the three baffles of the induction block are opposite to each other in the left-right direction, the front-back direction and the up-down direction; the three baffles of the sensor fixing frame are provided with a first displacement sensor, a second displacement sensor and a third displacement sensor.
In the above technical solution, further, the sensor is a non-contact displacement sensor.
Further, the baffle plate is made of metal.
Furthermore, the left base is formed by connecting a bottom plate and angle steel, the angle steel is perpendicular to the bottom plate, and the bottom plate is a steel plate.
Furthermore, the right base is formed by vertically connecting a bottom plate and a cuboid fixing component.
The invention also provides a measuring method of the crack three-direction relative displacement measuring device with the sensor, which specifically comprises the following steps:
and 3, calculating the difference between the measured data and the initial value, wherein the difference is the three-direction relative displacement of the crack.
The left base and the right base provide fixed support, wherein the angle steel model of the left base is ∟ 2#, the size of the bottom plate is 3cm multiplied by 4cm, the plate thickness is 2mm, screw holes are reserved at four corners, the angle steel is vertically welded on the bottom plate, a plurality of bolt holes are respectively arranged in the vertical direction from bottom to top at the middle positions of two sides of the angle steel, the distance is 2cm, bolt holes are reserved at the corresponding positions of the induction block 4 at the distance of 2 cm. from the circle center of the upper bolt hole to the edge of the upper part of the angle steel at the same distance, the change of the fixed height can be realized, the projection of each sensor in the baffle of the induction block 4 is ensured, the baffle of the induction block 4 is 4cm multiplied by 4.
Screw holes are reserved at four corners of a bottom plate of the right base, a cuboid fixing component is grooved, and the length, the width and the height of each groove are 4cm multiplied by 2.5 cm. The thickness of two side walls is 2mm, two screw holes are respectively arranged on two sides of the two side walls, the screw holes are horizontally arranged at a distance of 1cm, the distance between the center of the circle and the left edge and the right edge is 1cm, and the distance between the center of the circle and the top end is 2 cm. The size of the bottom plate is 3cm multiplied by 4cm, and the plate thickness is 2 mm.
Two thin-wall rectangular pipes with different sizes are fixed through bolts, and length adjustment can be achieved. Two rectangular pipe left sides all are equipped with 7 screws, interval 5cm, and the great rectangular pipe right side in cross-section is equipped with 2 screws simultaneously, interval 1cm, and the screw is arranged and is run through the rectangular pipe along the level. The rectangular pipe can be stretched to required length and fixed through the bolt, so that length adjustment can be realized, and the rectangular pipe is suitable for different installation conditions on different sites.
The crack three-direction relative displacement measuring device with the sensor has the following outstanding advantages:
the length of the cantilever member of the device is adjustable, and the device is tested by adopting the sensor, so that the device has the advantages of high measurement precision, simple structure, lower cost, convenience in operation and smaller volume. The device also has the characteristics of simple operation, easy carrying, strong function and low cost.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a schematic structural diagram of a crack three-dimensional relative displacement measuring device with a sensor;
FIG. 2 is a front view of a crack three-dimensional relative displacement measuring device with sensors;
FIG. 3 is a side view of a sensor-equipped crack three-dimensional relative displacement measuring device;
FIG. 4 is a three-dimensional view of the right base 2;
FIG. 5 is a three-dimensional view of the left base 1;
FIG. 6 is a structural diagram of the cantilever member in a disassembled state;
FIG. 7 is a schematic view of a sensor mount;
wherein, reference numeral 1 is a left base, 2 is a right base, 3 is a sensor fixing frame, 4 is an induction block, 5 is a cantilever member, 6 is an inclined strut, 7 is a screw hole, 8 is a first sensor, 9 is a second sensor, and 10 is a third sensor.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention. The invention is based on the premise that the sensor sensing surface is parallel to the corresponding sensing block baffle, and the projections of the sensor sensing surface in the X, Y and Z directions are all on the corresponding baffle.
Fig. 1 is a schematic structural diagram of a crack three-dimensional relative displacement measuring device with a sensor according to the present invention. The crack three-direction relative displacement measuring device of the embodiment comprises a left base 1, a right base 2, a cantilever member 5, a sensor fixing frame 3, an induction block 4 and an inclined strut 6.
The left base 1 and the right base 2 are respectively positioned at two sides of the structural crack or the expansion joint. Install on the left base 1 and respond to piece 4, right base 2 is connected with cantilever member 5's one end, and cantilever member 5's the other end is connected with sensor mount 3, installs first displacement sensor 8 on the sensor mount 3, and second displacement sensor 9 and third displacement sensor 10, sensor orientation equidirectional and mutually perpendicular test the relative displacement of three direction respectively. A diagonal brace 6 is also arranged between the right base 2 and the cantilever member 5. Because cantilever member 5 length adjustable and adopt the sensor test, therefore this measuring device measurement accuracy is high and have simple structure, the advantage of being convenient for operate.
In the device, a left base 1 and a right base 2 provide fixed support, the left base is formed by connecting a bottom plate and angle steel, the model of the angle steel is ∟ 2#, the size of the bottom plate is 3cm multiplied by 4cm, the thickness of the plate is 2mm, screw holes are reserved at four corners, the angle steel is vertically welded on the bottom plate, a plurality of bolt holes are respectively arranged at the middle positions of two sides of the angle steel from bottom to top in the vertical direction, the bolt holes are reserved at the corresponding positions at the same intervals of 2 cm. sensing blocks 4, the change of fixed height can be realized, the projection of each sensor in a baffle of the sensing block 4 is ensured, the shape of the angle steel is the same as that.
The sensor fixing frame 3 is composed of three fixing frames, and the sensing block 4 is formed by connecting three baffle plates in pairs, and the planes of the three baffle plates are perpendicular to each other. The three fixing frames of the sensor fixing frame 3 are respectively provided with a first displacement sensor, a second displacement sensor and a third displacement sensor which face different directions and are mutually vertical so as to test three-direction relative displacement. The sensor adopts a capacitance type sensor. The different directions are defined as an X axis, a Y axis and a Z axis, and the X axis, the Y axis and the Z axis are three-dimensional space coordinate axes. The baffle plane of the induction block 4 is vertical to the direction of the sensor, and the baffle is made of metal. The three sensors respectively detect the distances between the three sensors and the three baffles of the induction block 4, and the device has the advantages of automatic detection and high precision. The size of the baffle of the induction block 4 is 4cm multiplied by 4cm, and the plate thickness is 1 mm.
The combined cantilever member 5 consists of two thin-wall rectangular pipes with different sizes, and the rectangular pipe with smaller cross section size can extend into the other rectangular pipe and cling to the inner wall of the rectangular pipe, and a screw hole is reserved. The rectangular pipe left side that two sections are different all is equipped with 7 screws, interval 5cm, and the great rectangular pipe right side in cross-section is equipped with 2 screws simultaneously, and interval 1cm, screw are arranged and are run through along the level the rectangular pipe. The rectangular pipe can be stretched to required length and fixed through the bolt, so that length adjustment can be realized, and the rectangular pipe is suitable for different installation conditions on different sites.
The right base 2 is formed by fixing a bottom plate and a rectangular solid fixing component. Screw holes are reserved at four corners of the bottom plate. The cuboid fixing component is provided with a groove, and the length, the width and the height of the groove are 4cm multiplied by 2.5 cm. The thickness of two side walls is 2mm, two screw holes are respectively arranged on two sides of the two side walls, the screw holes are horizontally arranged at a distance of 1cm, the distance between the center of the circle and the left edge and the right edge is 1cm, and the distance between the center of the circle and the top end is 2 cm. The size of the bottom plate is 3cm multiplied by 4cm, and the plate thickness is 2 mm.
The inclined strut 6 is fixedly connected with the cantilever member 5 and the right base 2, so that the stability of the device is ensured.
The installation and measurement method of the crack three-direction relative displacement measurement device adopting the embodiment is as follows:
1) with the expansion joint as a reference, the left base 1 and the right base 2 are respectively fixed on two sides of the expansion joint by using the settlement nails, so that the device is fixed. By adjusting the height of the sensing block 4 and the length of the cantilever member 5, the projections of the sensing surfaces of the sensors in the respective directions are ensured to be on the corresponding baffle of the sensing block 4. And the effective sensing distance of the sensor is 20mm, and meanwhile, the distance between the sensor and the corresponding baffle is about 10 mm.
2) Assuming that the sensing block 4 is still, the distances between the sensing block and the corresponding baffles are respectively detected by the first sensor, the second sensor and the third sensor, and are respectively recorded as X, Y and Z values.
3) And calculating the difference between the measured data and the initial value, wherein the difference is the relative displacement of the two sides of the expansion joint.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (6)
1. A crack three-direction relative displacement measuring device with a sensor is characterized by comprising a left base (1), a right base (2), a cantilever member (5), a sensor fixing frame (3) and an induction block (4); the sensing block (4) is mounted on the left base (1), the right base (2) is connected with one end of a cantilever member (5), and the other end of the cantilever member (5) is connected with a sensor fixing frame (3); an inclined strut (6) is arranged between the right base (2) and the cantilever member (5); the cantilever member (5) consists of two thin-wall rectangular pipes with different sizes, and the rectangular pipe with smaller section size can be retracted into the other rectangular pipe; the sensor fixing frame (3) and the induction block (4) are formed by connecting three baffles in pairs, the planes of the baffles are perpendicular to each other, and the three baffles of the sensor fixing frame (3) and the three baffles of the induction block (4) are opposite to each other in the left-right direction, the front-back direction and the up-down direction; the three baffles of the sensor fixing frame (3) are provided with a first displacement sensor, a second displacement sensor and a third displacement sensor.
2. The crack three-way relative displacement measuring device with the sensor as claimed in claim 1, wherein: the sensor is a non-contact displacement sensor.
3. The crack three-way relative displacement measuring device with the sensor as claimed in claim 1, wherein: the baffle plate is made of metal.
4. The crack three-way relative displacement measuring device with the sensor as claimed in claim 1, wherein: the left base (1) is formed by connecting a bottom plate and angle steel, the angle steel is perpendicular to the bottom plate, and the bottom plate is a steel plate.
5. The device for measuring three-dimensional relative displacement of crack with sensor as claimed in claim 1, wherein the right base is vertically connected by a bottom plate and a rectangular parallelepiped fixing member.
6. The method for measuring the crack three-dimensional relative displacement measuring device with the sensor as claimed in any one of claims 1 to 5, wherein: the method comprises the following steps:
step 1, taking the expansion joint or the crack as a reference, and fixing a left base 1 and a right base 2 at two sides of the expansion joint or the crack respectively by using a settlement nail so as to realize the fixation of the device; the height of the induction block 4 and the length of the cantilever member 5 are adjusted to ensure that the projections of the sensors in the respective directions are all on the baffle corresponding to the induction block 4 and the distance between the sensor and the corresponding baffle is about 10 mm;
step 2, assuming that the induction block is still, respectively detecting the distances between the induction block and the corresponding baffle through a first sensor, a second sensor and a third sensor, and respectively recording the distances as X, Y and Z values;
and 3, calculating the difference between the measured data and the initial value, wherein the difference is the three-direction relative displacement of the crack.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911022255.7A CN110749296A (en) | 2019-10-25 | 2019-10-25 | Crack three-direction relative displacement measuring device with sensor and measuring method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911022255.7A CN110749296A (en) | 2019-10-25 | 2019-10-25 | Crack three-direction relative displacement measuring device with sensor and measuring method thereof |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546808A (en) * | 2003-12-02 | 2004-11-17 | 中国科学院地质与地球物理研究所 | Portable engineering geologic crack measuring apparatus |
| CN101639353A (en) * | 2009-08-18 | 2010-02-03 | 长安大学 | Gauge for three directional deformation of ground fissure |
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| CN203704830U (en) * | 2014-02-28 | 2014-07-09 | 三峡大学 | Simple three-dimensional displacement measuring device of geologic rock fracture in model test |
| CN105527165A (en) * | 2016-02-02 | 2016-04-27 | 山东省交通科学研究院 | Test method and test device for asphalt pavement crack load response relative displacement |
| CN106225761A (en) * | 2016-08-30 | 2016-12-14 | 中电投工程研究检测评定中心 | A kind of device of the Three-direction deformation of Deformation Monitoring seam both sides agent structure |
| CN106839955A (en) * | 2017-03-14 | 2017-06-13 | 中国电建集团西北勘测设计研究院有限公司 | A kind of Three-direction gap detector and method for monitoring concrete structure relative deformation |
| CN106989716A (en) * | 2017-05-19 | 2017-07-28 | 广州市建筑科学研究院有限公司 | A kind of three-dimensional relative displacement measurement apparatus of structure movement joint and method |
| CN107783142A (en) * | 2017-11-09 | 2018-03-09 | 王文兵 | Digitize three direction displacement measurement apparatus and its alignment error control method |
| CN108593009A (en) * | 2018-06-28 | 2018-09-28 | 南京理工大学 | A kind of measuring device of deformation joint or the three direction displacement in crack and newborn crack identification |
| CN109579756A (en) * | 2018-11-21 | 2019-04-05 | 国电南瑞科技股份有限公司 | A kind of crack three direction displacement monitoring measuring device |
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2019
- 2019-10-25 CN CN201911022255.7A patent/CN110749296A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546808A (en) * | 2003-12-02 | 2004-11-17 | 中国科学院地质与地球物理研究所 | Portable engineering geologic crack measuring apparatus |
| CN101639353A (en) * | 2009-08-18 | 2010-02-03 | 长安大学 | Gauge for three directional deformation of ground fissure |
| WO2012002611A1 (en) * | 2010-06-28 | 2012-01-05 | 주식회사 대동계측 | Crack measurer |
| CN203704830U (en) * | 2014-02-28 | 2014-07-09 | 三峡大学 | Simple three-dimensional displacement measuring device of geologic rock fracture in model test |
| CN105527165A (en) * | 2016-02-02 | 2016-04-27 | 山东省交通科学研究院 | Test method and test device for asphalt pavement crack load response relative displacement |
| CN106225761A (en) * | 2016-08-30 | 2016-12-14 | 中电投工程研究检测评定中心 | A kind of device of the Three-direction deformation of Deformation Monitoring seam both sides agent structure |
| CN106839955A (en) * | 2017-03-14 | 2017-06-13 | 中国电建集团西北勘测设计研究院有限公司 | A kind of Three-direction gap detector and method for monitoring concrete structure relative deformation |
| CN106989716A (en) * | 2017-05-19 | 2017-07-28 | 广州市建筑科学研究院有限公司 | A kind of three-dimensional relative displacement measurement apparatus of structure movement joint and method |
| CN107783142A (en) * | 2017-11-09 | 2018-03-09 | 王文兵 | Digitize three direction displacement measurement apparatus and its alignment error control method |
| CN108593009A (en) * | 2018-06-28 | 2018-09-28 | 南京理工大学 | A kind of measuring device of deformation joint or the three direction displacement in crack and newborn crack identification |
| CN109579756A (en) * | 2018-11-21 | 2019-04-05 | 国电南瑞科技股份有限公司 | A kind of crack three direction displacement monitoring measuring device |
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