CN116734755A - Large-span steel girder deflection measuring device and measuring method - Google Patents
Large-span steel girder deflection measuring device and measuring method Download PDFInfo
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- CN116734755A CN116734755A CN202310598415.2A CN202310598415A CN116734755A CN 116734755 A CN116734755 A CN 116734755A CN 202310598415 A CN202310598415 A CN 202310598415A CN 116734755 A CN116734755 A CN 116734755A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 116
- 239000010959 steel Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005259 measurement Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 229910001369 Brass Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a measuring device, and aims to provide a large-span steel beam deflection measuring device and a measuring method. The technical proposal is as follows: a large-span girder steel deflection measuring device, its characterized in that: the device comprises a laser infrared measuring device and two indicating scales; the laser infrared measuring device and the indication scale comprise four upright posts and magnetic bases which are respectively fixed at the top and the bottom of the four posts and provided with universal pulleys.
Description
Technical Field
The invention relates to a measuring device, in particular to a large-span steel beam deflection measuring device and a measuring method.
Background
Large span steel structural beams are important load bearing components. The steel beam is commonly provided with an I shape and a box shape, and deflection needs to be measured before and after the steel beam is installed. For the important steel beam service period, the steel beam deflection change condition needs to be detected regularly. Currently, when measuring the deflection of a steel beam, a level gauge or a total station is often adopted for measurement. However, after the steel beam is installed, the upper surface and the lower surface of the steel beam are generally provided with more welding parts and connecting parts, and the steel beam is special in position, so that the on-site measurement by using a level or a total station is very inconvenient or impossible. At present, in actual work, a horizontal line method is often pulled (transparent plastic pipe is adopted for horizontal line method measurement), but the measurement error is larger, at least two persons cooperate in the measurement process, and the measurement process is complex.
Disclosure of Invention
The invention aims to overcome the defects in the background technology, and provides a large-span steel beam deflection measuring device and a measuring method, by adopting the device and the measuring method, a power source and a water source are not needed, a mechanical rotating part is not needed, the device is simple, the device is firm and durable, and an operator does not need professional training.
The technical scheme provided by the invention is as follows:
a large-span girder steel deflection measuring device, its characterized in that: the device comprises a laser infrared measuring device and two indicating scales; the laser infrared measuring device and the indication scale comprise four upright posts and magnetic bases which are respectively fixed at the top and the bottom of the four posts and provided with universal pulleys;
a laser infrared range finder with a Bluetooth receiving assembly is also arranged between the two magnetic bases of the laser infrared measuring device, and the two arranged range finding heads respectively emit laser infrared rays which are horizontal and have opposite directions for measuring the distance and indicating the position of the staff;
and a vertically arranged scale is further arranged between the two magnetic bases of the indicating scale, and the indicating scale corresponding to the laser infrared rays and the PSD position sensor are marked on the scale.
The four support posts are respectively fixed with four corners of the magnetic base to form a space for accommodating the laser infrared range finder or the scale.
In the laser infrared measuring device, a laser infrared range finder is spliced and hung on a fixing piece at the bottom end of a magnetic base through a connecting piece fixed at the top end.
The top end of the connecting piece is a spherical joint, and a spherical hole matched with the spherical joint is formed in the fixing piece.
The scale is hung on the lifting lug of the magnetic base through a rotating shaft connected with the top end of the scale; the bottom of the scale is a lead block for keeping the scale vertical.
One surface of the staff gauge is marked with the indication scale, and the other surface of the staff gauge is attached to the PSD position sensor.
The data processing module box is internally provided with a battery and a Bluetooth transmitting assembly; the Bluetooth transmitting assembly is electrically connected with the PSD position sensor through a wire.
The magnetic base is provided with a magnetic switch.
The method for measuring the steel beam by adopting the large-span steel beam deflection measuring device comprises the following steps:
(1) Starting a magnetic switch of each magnetic base, and vertically adsorbing and fixing the laser infrared measuring device and the indicating scale on the upper surface or the lower surface of the steel beam to be measured; the laser infrared measuring device is positioned in the middle of the steel beam, and the two indicating scales are respectively positioned at the supporting positions on two sides of the steel beam;
(2) Starting a laser infrared measuring device, emitting two laser infrared rays which are horizontal and opposite in direction, irradiating PSD position sensors on indication scales on two sides of a steel beam, generating an electric signal by the PSD position sensors, and converting the electric signal by a Bluetooth transmitting assembly to emit a wireless signal;
(3) After receiving the wireless signal, the Bluetooth receiving component in the laser infrared measuring device converts the signal into a length value of the steel beam and a deflection value of the steel beam, and meanwhile, a chip processor in the laser infrared measuring device automatically calculates the deflection value of the steel beam; then the data are displayed on a left scale value display screen, a right scale value display screen and a disturbance degree calculated value display screen one by one;
(4) And the detection personnel can judge whether the detected steel girder is qualified or not by comparing the numerical values displayed on the display screen according to the relevant standards.
And (3) after starting, judging whether the distances displayed on the left distance display screen and the right distance display screen are equal, if not, horizontally moving and adjusting the laser infrared measuring device until the distances displayed on the left distance display screen and the right distance display screen are equal, and then entering the next step.
The beneficial effects of the invention are as follows:
the deflection measuring device provided by the invention has the advantages of simple structure, no mechanical rotating parts, firmness and durability; the provided measuring method has high measuring precision, is convenient to carry, does not need a power supply or a water source, and is easy to operate and learn.
Drawings
Fig. 1 is a schematic diagram of a front view of a laser infrared measurement device according to an embodiment of the present invention.
Fig. 2 is a schematic left-view structure of a laser infrared measuring device according to an embodiment of the present invention.
Fig. 3 is a schematic top view of a laser infrared measurement device according to an embodiment of the present invention.
Fig. 4 is an enlarged schematic view of the laser infrared rangefinder of fig. 1.
Fig. 5 is a schematic diagram showing a front view of a scale according to an embodiment of the present invention.
Fig. 6 is a schematic diagram showing a left-hand structure of the indicating scale in the embodiment of the present invention.
Fig. 7 is a schematic diagram of magnetic base adsorption in an embodiment of the invention.
Fig. 8 is a schematic view of the state of the invention when the deflection value is measured under the steel beam.
Fig. 9 is a schematic view showing a state in which the deflection value is measured above the steel beam according to the present invention.
Fig. 10 is a schematic view of the invention in a measurement state under a beam when both ends of the beam are at the same level.
Fig. 11 is a schematic view showing a measurement state under a girder when both ends of the girder are not at the same level.
Fig. 12 is a schematic view of the present invention in a measurement state above a girder when both ends of the girder are at the same level.
Fig. 13 is a schematic view showing a measurement state of the present invention above a steel beam when both ends of the beam are not at the same level.
In the figure: 1. a rangefinder magnetic base; 2. a rangefinder stand; 3. a laser infrared range finder; 3-1, left ranging head; 3-2, left side distance display screen; 3-3, a right side distance display screen; 3-4, right ranging heads; 3-5, a right scale value display screen; 3-6, a power switch key; 3-7, a deflection calculated value display screen; 3-8, a left scale value display screen; 4. laser infrared rays; 5. a connecting piece; 6. a fixing member; 7. a locking member; 8. a magnetic switch; 9. a universal pulley; 10. a magnetic base of the indication ruler; 11. a ruler support post; 12. a ruler; 13. a clamping member; 14. lifting lugs; 15. a magnetic switch; 16. a universal pulley; 17. a data processing module box; 18. a wire; 19. PSD position sensor; 20. a lead block; 21. a steel beam; 22. supporting a steel beam; 23. an indication ruler; 24. a laser infrared ranging device; 1-1, brass sheet; 1-2, electrician soft iron; 1-3, permanent magnets; 1-4, magnetic force lines; 1-5 parts of brass sheet.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples.
The invention relates to a large-span steel beam deflection measuring device which comprises a laser infrared measuring device and an indicating scale.
As shown in fig. 1, 2 and 3, the laser infrared measuring device adopts a vertical hollow cuboid frame design, the upper end and the lower end of the laser infrared measuring device are respectively provided with a magnetic base 1, four distance meter struts 2 are adopted in the middle to be fixed at four corners of the magnetic base, and the top end and the bottom end of each strut are respectively connected with one magnetic base 1.
The magnetic base is provided with a magnetic switch 8 for controlling the attraction force of the magnetic base; the top and bottom ends of the laser infrared measuring device (namely the top end of the magnetic base at the top and the bottom end of the magnetic base at the bottom) are respectively provided with universal pulleys 9, and the magnetic base 1 can also move the measuring device through the four universal pulleys 9 after being adsorbed on a steel beam by magnetic force.
In the hollow frame of the laser infrared measuring device, a laser infrared distance meter 3 (outsourcing part) is arranged, the left side and the right side of the laser infrared distance meter are respectively provided with a distance measuring head which are respectively used for emitting laser infrared rays 4 which are horizontal and opposite in direction to carry out distance measurement and indicating the position of a scale, the sum of the two measured distances is the length of a steel beam, and the indicated position of the scale is used for calculating the deflection of the steel beam. As shown in fig. 4, left and right sides of the laser infrared range finder 3 are respectively provided with a left range finding head 3-1 and a right range finding head 3-4; the front of the laser infrared distance meter is provided with a left distance display screen 3-2, a right distance display screen 3-3 (the sum of the numerical values displayed on the left distance display screen and the right distance display screen is the length of the steel beam), a right scale value display screen 3-5, a power switch key 3-6, a deflection calculated value display screen 3-7 and a left scale value display screen 3-8. Wherein: the value of the left distance display screen is derived from the ranging signal of the left ranging head, and the value of the right distance display screen is derived from the ranging signal of the right ranging head; the left scale value display screen, the right scale value display screen and the disturbance degree calculated value display screen are all connected to an internal chip processor of the laser infrared range finder, and the internal chip processor receives data, calculates and displays and transmits the data.
The laser infrared distance measuring instrument 3 is hung on the fixing piece 6 of the magnetic base 1 through a rod-shaped connecting piece 5. One end of the connecting piece 5 is a threaded joint, the joint is connected with the laser infrared range finder through threads, and the other end of the connecting piece is a spherical joint; the inside of the fixing piece 6 is a spherical hole which is matched with the spherical joint, and the connecting piece 5 can be always kept vertical under the action of gravity after being matched with the spherical joint. If the connecting piece 5 is in a vertical state, but the distance between the laser infrared distance measuring instrument and the left and right support posts is not equal, the position of the magnetic base on the steel beam is adjusted to enable the laser infrared measuring device to be in a vertical state, and then the connecting piece 5 is adjusted to be kept vertical and locked. The locking piece 7 of the spherical joint is a fastening bolt arranged in a screw hole of the fixing piece 6, and the fastening bolt is used for locking the vertical state of the connecting piece 5 after pressing the spherical joint, so that the connecting piece is not swayed any more, and the laser infrared range finder is ensured to be positioned at a correct measuring position.
In the indication scale shown in fig. 5 and 6, a magnetic base 10 is respectively arranged at the top and the bottom, and each magnetic base is provided with a magnetic switch 15 for controlling the attraction force of the magnetic base; four indicator rule posts 11 are arranged between the two magnetic bases, one at each of the top and bottom ends of each post. 4 universal pulleys 16 are arranged on four corners of the top end of the indication scale (namely the top end of the magnetic base at the top) and on four corners of the bottom end of the indication scale (namely the bottom end of the magnetic base at the bottom); the magnetic base 10 is attached to the steel beam by magnetic force vertically, and then the indication scale can be moved by the universal pulley 16. The magnetic base of the indication scale is completely the same as the magnetic base structure in the laser infrared measuring device; the structure and arrangement mode of the four indicating rule posts are identical with those of the four distance meter posts in the laser infrared measuring device.
As shown in fig. 6, a pair of lifting lugs 14 are arranged at the bottom end of the magnetic base at the top of the indication scale, and a clamping piece 13 is arranged below the lifting lugs 14; the clamping piece 13 is hung on the lifting lugs through a rotating shaft horizontally inserted in the pair of lifting lugs and can rotate on the rotating shaft on the lifting lug 14; the top of the scale 12 is suspended on the lifting lug by a clamping piece, and a lead block 20 is arranged below the scale 12 and used for ensuring the natural verticality of the scale 12. One side of the scale 12 is marked with an indication scale, and the laser infrared ray can read out the numerical value when being projected to a certain scale; the PSD position sensor 19 is attached to the other surface of the scale 12; the PSD position sensor (prior art) is an optical detector capable of measuring the continuous position of a light spot on a photosensitive surface, can convert the position of the light spot on the photosensitive surface into an electric signal, and has the advantages of high position resolution, high response speed, simple processing circuit and the like. The PSD position sensor has the same width as the staff gauge and is in a strip shape, and a photosensitive surface is arranged in the middle; when receiving laser infrared rays, the position of a light spot generates photoelectric effect, and the generated electric signals are transmitted to a Bluetooth transmitting assembly (a data processing module box 17 is fixed at the bottom end of a magnetic base, and the data processing module box is internally provided with the Bluetooth transmitting assembly and a battery for supplying power to the Bluetooth transmitting assembly) through a lead wire 18, so that information data of the position of the light spot can be transmitted to a Bluetooth receiving assembly in a laser infrared range finder through the Bluetooth transmitting assembly; after the Bluetooth receiving component receives the information data, the information data is transmitted to an internal chip processor of the laser infrared range finder, and the scale indication scale can be directly displayed, so that the automatic reading and recording of the scale indication data are realized. The scale value marked on one surface of the scale is used for preventing the battery in the data processing module box 17 from being unpowered, and the spot position value can be manually read for measurement and calculation.
The magnetic base (prior art) shown in fig. 7 includes brass sheet 1-1, electrical soft iron 1-2, permanent magnet 1-3, magnetic force line 1-4, brass sheet 1-5. The permanent magnet of the magnetic base in the figure is in a working state when horizontally arranged, and the permanent magnet shows magnetism outwards; when the magnetic switch is rotated to enable the permanent magnet to rotate 90 degrees, the magnetic base does not show magnetism outwards.
The working principle of the invention is as follows:
the deflection measuring device can measure the deflection value of the steel beam below the steel beam and the deflection value of the steel beam above the steel beam, and can adapt to different measuring environments. The laser infrared distance meter respectively emits a laser infrared ray in the same horizontal direction on the left side and the right side, light is projected onto an indication scale below (or above) two ends of the steel beam, the indication reading can be directly read manually, the indication reading can be directly read through a PSD position sensor, the sum of the two readings is divided by 2, and the distance from the luminous center of the laser infrared distance meter to the steel beam (the distance is a constant value and provided by a manufacturing plant) is subtracted, so that the deflection value can be calculated; when deflection is measured above the steel beam, the deflection value is a negative value, but the value should be calculated as a positive value after the absolute value. The sum of the distances from the laser infrared range finder to the two scales is the length of the steel beam, and the deflection value is obtained by dividing the deflection value by the length of the steel beam. Different industry standards have different regulations on the deflection value of the steel beam, such as DL/T612-2017 regulations, and the suspended steel beam is unqualified when the deflection value exceeds 1/850 and is qualified when the deflection value is less than 1/850, and whether the suspended steel beam is qualified or not can be rapidly judged through detection of the device.
Fig. 8 is a schematic illustration of the measurement of the deflection measuring device under a steel beam. The steel beam 21 is provided with steel beam supports 22 at both ends. The indication scale 23 is absorbed below the two ends of the steel beam 21, the laser infrared ranging device 24 is absorbed in the middle position below the steel beam, and the laser infrared rays 4 emitted by the laser infrared ranging device are respectively projected on the left scale and the right scale on the same horizontal line.
Fig. 9 is a schematic illustration of the measurement of the deflection measuring device above the steel beam. The steel beam 21 is also provided with steel beam supports 22 at both ends. The indication scale 23 is absorbed above the two ends of the steel beam 21, the laser infrared ranging device 24 is absorbed in the middle position above the steel beam, and the laser infrared rays 4 emitted by the laser infrared ranging device are respectively projected on the left scale and the right scale on the same horizontal line.
Fig. 10 shows the deflection measuring device below the steel beam with both ends of the steel beam supported on the same horizontal line. The values of AC and BD are the indicated values of laser infrared rays projected on the scale from the left side and the right side sent by the laser infrared range finder plus the height value of the magnetic base; since both ends of the steel beam are supported on the same horizontal line, ac=bd=pq, pq= (ac+bd)/2; the 0Q is the vertical distance from the laser infrared ray of the laser infrared ray range finder to the steel beam, and the value is a fixed value, namely the self height value of the laser infrared ray range finder; the O point is the center point of the steel beam in the length direction. The laser infrared distance measuring instrument is moved to see the distance indication values on the left side and the right side, and the adjustment is continuously carried out until the laser infrared distance measuring instrument is exactly positioned at the center position of the steel beam in the length direction, namely CQ=DQ; the PQ length can be calculated by measurement with a laser infrared range finder, OQ is a constant value, and the downwarping value op=pq-OQ at this time.
Fig. 11 shows the case where the deflection measuring device is below the steel beam and the two ends of the steel beam are not supported on the same horizontal line. The values of AC and BD are the indicated values of laser infrared rays projected on the scale from the left side and the right side of the laser infrared ray range finder plus the height value of the magnetic base, and the two ends of the steel beam are supported on the same horizontal line, so that the AC is not equal to BD; the 0Q is the vertical distance from the laser infrared ray of the laser infrared ray range finder to the steel beam, and the value is a fixed value, namely the self height value of the laser infrared ray range finder; the O point is the center point of the steel beam in the length direction. And the laser infrared distance measuring instrument is moved to see the distance indication values at the two sides, and the adjustment is continuously moved until the laser infrared distance measuring instrument is exactly positioned at the center position of the steel beam in the length direction, and at the moment, CQ=DQ. According to the trapezoidal median line theorem, pq= (ac+bd)/2, the PQ length may be calculated by measurement with a laser infrared range finder, OQ is a constant value, where the downwarping value op=pq-OQ.
Fig. 12 shows the case where the deflection measuring device is above the steel beam and both ends of the steel beam are supported on the same horizontal line. The values of AC and BD are the indicated values projected on the scale by the laser infrared rays on the left side and the right side sent by the laser infrared range finder and the height of the magnetic base; since both ends of the steel beam are supported on the same horizontal line, ac=bd=pq, pq= (ac+bd)/2; the 0Q is the vertical distance from the laser infrared ray of the laser infrared ray range finder to the steel beam, and the vertical distance is a fixed value, namely the self-height value of the laser infrared ray range finder; the O point is the center point of the steel beam in the length direction. And the laser infrared distance measuring instrument is moved to see the distance indication values at the two sides, and the adjustment is continuously moved until the laser infrared distance measuring instrument is exactly positioned at the center position of the steel beam in the length direction, and at the moment, CQ=DQ. The PQ length can be calculated by measurement with a laser infrared range finder, OQ is a constant value, where the downwarping value op=oq-pq= - (PQ-0Q).
Fig. 13 shows the case where the deflection measuring device is above the steel beam and the two ends of the steel beam are not supported on the same horizontal line. The values of AC and BD are the indicated values of laser infrared rays projected on the scale from the left side and the right side of the laser infrared ray range finder plus the height of the magnetic base, and the two ends of the steel beam are supported on the same horizontal line, so that AC is not equal to BD; the 0Q is the vertical distance from the infrared ray of the laser infrared range finder to the steel beam, and the vertical distance is a fixed value, namely the height value of the laser infrared range finder; the O point is the center point of the steel beam in the length direction. And the laser infrared distance measuring instrument is moved to see the distance indication values at the two sides, and the adjustment is continuously moved until the laser infrared distance measuring instrument is exactly positioned at the center position of the steel beam in the length direction, and at the moment, CQ=DQ. According to the trapezoidal median line theorem, pq= (ac+bd)/2, the PQ length may be calculated by laser infrared range finder measurement, where the downwarping value op=oq-pq= - (PQ-0Q).
From the above 4 analysis, it can be seen that the deflection value is measured below the steel beam, and the two ends of the steel beam are on the same horizontal plane and not on the same horizontal plane, and the calculation formulas are consistent. And measuring deflection values above the steel beam, wherein the two ends of the steel beam are on the same horizontal plane and not on the same horizontal plane, and the calculation formulas are also consistent. The difference between the deflection value measured below the steel beam and above the steel beam is that: when measured below the steel beam, the downwarping value op=pq-OQ, the OP value being positive; and op= - (PQ-OQ) when measuring the top of girder steel, the OP value is the negative value at this moment, but when the chip of laser infrared range finder carries out the operation, the downwarping number is scratched the value and is taken the positive value and calculate.
Since the measuring tool can measure the length l=cq+dq of the steel beam at the same time, the deflection value OP/steel beam length l=steel beam deflection value. The invention has the advantages that the length and the deflection value of the large-span steel beam can be measured simultaneously, and the deflection value can be automatically calculated. The measuring tool is simple, the detecting speed is high, the accuracy is high, and the measuring tool can be used as a tool for measuring the length of the steel beam.
Claims (10)
1. A large-span girder steel deflection measuring device, its characterized in that: the device comprises a laser infrared measuring device (24) and two indicating scales (23); the laser infrared measuring device and the indication scale comprise four upright posts and magnetic bases (1) which are respectively fixed at the top and the bottom of the four posts and provided with universal pulleys;
a laser infrared range finder (3) with a Bluetooth receiving assembly is also arranged between the two magnetic bases of the laser infrared measuring device, and the two arranged range finding heads respectively emit laser infrared rays (4) which are horizontal and have opposite directions and are used for measuring the distance and indicating the position of the scale;
a vertically arranged scale (12) is further arranged between the two magnetic bases of the indicating scale, and an indicating scale corresponding to the laser infrared rays and a PSD position sensor (19) are marked on the scale.
2. The large span steel girder deflection measuring device according to claim 1, characterized in that: the four support posts are respectively fixed with four corners of the magnetic base to form a space for accommodating the laser infrared range finder or the scale.
3. The large span steel girder deflection measuring device according to claim 2, characterized in that: in the laser infrared measuring device, a laser infrared range finder is spliced and hung on a fixing piece (6) at the bottom end of a magnetic base through a connecting piece (5) with the fixed top end.
4. A large span steel girder deflection measuring device according to claim 3, characterized in that: the top end of the connecting piece is a spherical joint, and a spherical hole matched with the spherical joint is formed in the fixing piece.
5. The large span steel girder deflection measuring device of claim 4, wherein: the scale is hung on a lifting lug (14) of the magnetic base through a rotating shaft connected with the top end of the scale; the bottom of the scale is a lead block (20) for keeping the scale vertical.
6. The large span steel girder deflection measuring device of claim 5, wherein: one surface of the staff gauge is marked with the indication scale, and the other surface of the staff gauge is attached to the PSD position sensor.
7. The large span steel girder deflection measuring device of claim 6, wherein: the data processing module box is internally provided with a battery and a Bluetooth transmitting assembly; the Bluetooth transmitting assembly is electrically connected with the PSD position sensor through a wire (18).
8. The large span steel girder deflection measuring device of claim 7, wherein: the magnetic base is provided with a magnetic switch (8).
9. A method of steel beam measurement using the large span steel beam deflection measuring device of claim 1, comprising the steps of:
(1) Starting a magnetic switch of each magnetic base, and vertically adsorbing and fixing the laser infrared measuring device and the indicating scale on the upper surface or the lower surface of the steel beam to be measured; the laser infrared measuring device is positioned in the middle of the steel beam, and the two indicating scales are respectively positioned at the supporting positions on two sides of the steel beam;
(2) Starting a laser infrared measuring device, emitting two laser infrared rays which are horizontal and opposite in direction, irradiating PSD position sensors on indication scales on two sides of a steel beam, generating an electric signal by the PSD position sensors, and converting the electric signal by a Bluetooth transmitting assembly to emit a wireless signal;
(3) After receiving the wireless signal, the Bluetooth receiving component in the laser infrared measuring device converts the signal into a length value of the steel beam and a deflection value of the steel beam, and meanwhile, a chip processor in the laser infrared measuring device automatically calculates the deflection value of the steel beam; then the data are displayed on a left scale value display screen, a right scale value display screen and a disturbance degree calculated value display screen one by one;
(4) And the detection personnel can judge whether the detected steel girder is qualified or not by comparing the numerical values displayed on the display screen according to the relevant standards.
10. The method of measuring steel beams according to claim 9, wherein: and (3) after starting, judging whether the distances displayed on the left distance display screen and the right distance display screen are equal, if not, horizontally moving and adjusting the laser infrared measuring device until the distances displayed on the left distance display screen and the right distance display screen are equal, and then entering the next step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310598415.2A CN116734755A (en) | 2023-05-22 | 2023-05-22 | Large-span steel girder deflection measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310598415.2A CN116734755A (en) | 2023-05-22 | 2023-05-22 | Large-span steel girder deflection measuring device and measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116734755A true CN116734755A (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310598415.2A Pending CN116734755A (en) | 2023-05-22 | 2023-05-22 | Large-span steel girder deflection measuring device and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116734755A (en) |
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2023
- 2023-05-22 CN CN202310598415.2A patent/CN116734755A/en active Pending
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