CN110095094B - Device for measuring high object from ground for constructional engineering and measuring method thereof - Google Patents
Device for measuring high object from ground for constructional engineering and measuring method thereof Download PDFInfo
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- CN110095094B CN110095094B CN201810085323.3A CN201810085323A CN110095094B CN 110095094 B CN110095094 B CN 110095094B CN 201810085323 A CN201810085323 A CN 201810085323A CN 110095094 B CN110095094 B CN 110095094B
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- G01—MEASURING; TESTING
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Abstract
The invention relates to the field of measuring devices, in particular to a device for measuring a high object from the ground for constructional engineering and a measuring method thereof. The key points of the technical scheme are as follows: comprises a sensing component; the sensing assembly comprises a first distance sensor, a second distance sensor and a processor, the second distance sensor is horizontally arranged, the first distance sensor is positioned in a vertical plane, and an included angle between the first distance sensor and the horizontal plane is alpha; the first distance sensor and the second distance sensor are both connected with the processor; the first distance sensor is capable of measuring the horizontal longitudinal dimension and the vertical dimension of an object at height, and the second distance sensor is capable of measuring the horizontal transverse dimension of an object at height. The device is characterized by being capable of measuring the size of an object at a high position.
Description
Technical Field
The invention relates to the field of measuring devices, in particular to a device for measuring a high object from the ground for constructional engineering and a measuring method thereof.
Background
In interior decoration, it is often necessary to measure the dimensions of objects at heights. Conventionally, a measuring person reaches the height of an object to be measured by using tools such as an escalator, and the like, and the height is measured by using measuring tools such as a tape measure. Therefore, on one hand, the personal safety of the measuring personnel cannot be guaranteed, on the other hand, the visual error of the measuring personnel can increase the system error of measurement, and the measurement precision is low.
In view of the above problems, the following patents exist in China:
patent grant publication no: CN106441092A discloses a size measuring method and a mobile terminal, and belongs to the technical field of electronics. The method is used for a mobile terminal, a camera is arranged on the mobile terminal, and the method comprises the following steps: acquiring the distance between a target object and the mobile terminal; when the length direction of the mobile terminal is parallel to the length direction of the target object, acquiring the field angle of the camera; and determining the size of the target object according to the field angle and the distance. The invention solves the problem of lower convenience in measuring the size of the object in the prior art, realizes the effect of improving the convenience in measuring the size of the object, and is used for measuring the size of the object.
However, the measurement method of the patent requires a hand to hold the mobile terminal for measurement when measuring a high object, and when measuring a high object, the measured dimension is often the oblique section dimension of the object, not the three-view dimension, and thus is not suitable for measuring the dimension of the high object indoors.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device for measuring a high object from the ground for constructional engineering, which is characterized by being capable of measuring the size of the high object indoors.
The technical purpose of the invention is realized by the following technical scheme: an apparatus for measuring an elevated object from the ground for construction work, comprising a sensing assembly; the sensing assembly comprises a first distance sensor, a second distance sensor and a processor, the second distance sensor is horizontally arranged, the first distance sensor is positioned in a vertical plane, and an included angle between the first distance sensor and the horizontal plane is alpha; the first distance sensor and the second distance sensor are both connected with the processor; the first distance sensor is capable of measuring the horizontal longitudinal dimension and the vertical dimension of an object at height, and the second distance sensor is capable of measuring the horizontal transverse dimension of an object at height.
Through above-mentioned technical scheme, utilize first distance sensor to measure the horizontal longitudinal dimension and the vertical direction size of eminence object, utilize second distance sensor to measure the horizontal transverse dimension of eminence object to measure the indoor size of eminence object, measurement accuracy is high.
Preferably, the device further comprises a self-balancing stabilizing device; the self-balancing stabilizing device comprises a universal rotating mechanism and a balancing mechanism; the sensing assembly is arranged on the universal rotating mechanism, and the balancing mechanism is arranged on the sensing assembly; the balance mechanism can keep the orientations of the first distance sensor and the second distance sensor stable.
Through above-mentioned technical scheme, self-balancing stabilising arrangement can keep first distance sensor and second distance sensor's angle invariable, avoids it to produce at the removal in-process and rocks and lead to measuring error.
Preferably, the universal rotating mechanism is a universal ball, the universal ball comprises a shell and a ball, and the sensing assembly and the balancing mechanism are arranged in the ball.
Through above-mentioned technical scheme, set up universal ball for no matter rock towards that direction, first distance sensor and second distance sensor's angle can both be adjusted.
Preferably, the balance mechanism is a gyroscope, a motor is arranged on the gyroscope, and the gyroscope is driven to rotate by the motor; the motor is electrically connected with the processor.
Through above-mentioned technical scheme, utilize the stable principle of the axis of gyroscope, guarantee that first distance sensor and second distance sensor's angle is invariable.
Preferably, the universal ball is further provided with a magnetic positioning assembly, the magnetic positioning assembly comprises a first magnet and a second magnet, and the magnetic pole directions of the first magnet and the second magnet are the same; the first magnet is arranged on a ball of the universal ball, the second magnet is arranged on the side face, close to the ball, of the shell, and the second magnet and the first magnet are arranged oppositely.
Through above-mentioned technical scheme, set up magnetic force positioner, can keep the position of universal ball when the gyroscope is rotatory, prevent that universal ball and gyroscope from following the commentaries on classics.
Preferably, a communication device is further disposed on the processor.
Through the technical scheme, the communication device is arranged, so that information on the processor can be transmitted to other equipment, and information sharing and interconnection are realized.
Preferably, the device also comprises a sliding assembly, wherein the sliding assembly comprises a rack, a vertical sliding device and a horizontal sliding device; the vertical sliding device comprises a vertical sliding rail arranged on the rack, a first sliding block is arranged on the vertical sliding rail, and the sensing assembly is arranged on the first sliding block; the horizontal sliding device comprises a horizontal transverse sliding rail and a horizontal longitudinal sliding rail which are vertically crossed; and a second sliding block is arranged at the bottom of the rack and can slide on the horizontal transverse sliding rail and the horizontal longitudinal sliding rail.
Through above-mentioned technical scheme, set up the subassembly that slides, first distance sensor and second distance sensor can carry out smooth removal through the subassembly that slides, can further reduce the error that handheld removal leads to.
Preferably, the sensing assembly is further provided with a reset button, and the reset button is electrically connected with the processor.
Through the technical scheme, the reset button is arranged, and the time for starting to calculate the distance can be controlled.
Another object of the present invention is to provide a measuring method for measuring an object at a high place from the ground for construction work, which is characterized by being capable of measuring the size of the object at a high place.
The technical purpose of the invention is realized by the following technical scheme: a measuring method for measuring high objects from the ground for construction engineering is suitable for the device for measuring high objects from the ground for construction engineering, and comprises the following steps: keeping the position of the first sliding block unchanged, and enabling the rack to move along the horizontal transverse sliding rail; when the first distance sensor moves to the edge of the object to be detected, pressing a reset button; moving the rack to the edge of the other side of the object to be measured along the horizontal direction, and collecting a measured value a of the second distance sensor according to a set sampling interval delta t; stopping recording after the first distance sensor moves to the edge of the other side of the object to be measured; calculating the maximum value a1 of a; keeping the position of the first sliding block unchanged, and enabling the rack to move along the horizontal longitudinal sliding rail; when the first distance sensor moves to the edge of the object to be detected, pressing a reset button; moving the rack to the edge of the other side of the object to be measured along the horizontal and longitudinal directions, and collecting a measured value b of the first distance sensor according to a set sampling interval delta t; stopping recording after the first distance sensor moves to the edge of the other side of the object to be measured; calculating the maximum value b1 of b and the minimum value b2 of b; keeping the position of the second sliding block unchanged, and enabling the first sliding block to move along the vertical sliding rail; when the first distance sensor moves to the edge of the object to be detected, pressing a reset button; moving the first sliding block to the edge of the other side of the object to be measured along the vertical direction, and collecting a measured value c of the first distance sensor according to a set sampling interval delta t; stopping recording after the first distance sensor moves to the edge of the other side of the object to be measured; calculating the maximum value c1 of c and the minimum value c2 of c; obtaining the size of the object along the vertical direction: a = a1, B = (B1-B2) × sin α, C = (C1-C2) × cos α; wherein, A is the size of the object along the horizontal transverse direction, B is the size of the object along the vertical direction, and C is the size of the object along the horizontal longitudinal direction.
Through above-mentioned technical scheme, realize the measurement of the size of eminence object.
Preferably, the sampling interval Δ t is 20 ms.
Through above-mentioned technical scheme, first distance sensor and second distance sensor can utilize the power of 50Hz, for example the commercial power is supplied power.
The invention has the beneficial effects that: 1) the horizontal longitudinal dimension and the vertical dimension of an object at a high position are measured by the first distance sensor, and the horizontal transverse dimension of the object at the high position is measured by the second distance sensor, so that the dimension of the object at the high position is measured, and the measurement precision is high; 2) the angle of the first distance sensor and the angle of the second distance sensor can be kept constant through the self-balancing stabilizing device, and measuring errors caused by shaking in the moving process are avoided; 3) through setting up the subassembly that slides, first distance sensor and second distance sensor can carry out smooth removal through the subassembly that slides, can further reduce handheld error that leads to that removes.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a top view of embodiment 1;
FIG. 3 is a cross-sectional view B-B of FIG. 2;
fig. 4 is an electrical connection diagram of the sensing assembly of embodiment 1.
Reference numerals: 1. a sensing component; 2. a self-balancing stabilizing device; 3. a slipping component; 4. a first distance sensor; 5. a second distance sensor; 6. a processor; 7. a reset button; 8. a universal ball; 9. a balancing mechanism; 10. a housing; 11. a ball bearing; 12. a magnetic positioning assembly; 13. a first magnet; 14. a second magnet; 15. a gyroscope; 16. a motor; 17. a frame; 18. a vertical sliding device; 19. a horizontal sliding device; 20. a vertical slide rail; 21. a first slider; 22. a horizontal transverse slide rail; 23. a horizontal longitudinal slide rail; 24. a second slider; 25. a communication device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1: a device for measuring high objects from the ground for constructional engineering comprises a sensing assembly 1, a self-balancing stabilizing device 2 and a sliding assembly 3. The sensing assembly 1 can collect distance information of a high object and convert the distance information into size data through conversion. The self-balancing stabilizing device 2 is used for keeping an included angle between the sensing assembly 1 and a horizontal plane fixed, and parameters required during conversion are guaranteed to be fixed values. The sensing assembly 1 can realize stable movement through the sliding assembly 3, and the variable during conversion is reduced, so that the number of sensors of the sensing assembly 1 is reduced, the cost is saved, the complexity of calculation is reduced, and the efficiency is improved.
The sensing assembly 1 comprises a first distance sensor 4, a second distance sensor 5 and a processor 6, wherein the second distance sensor 5 is horizontally arranged, the first distance sensor 4 is positioned in a vertical plane, and an included angle between the first distance sensor 4 and the horizontal plane is alpha. The first distance sensor 4 and the second distance sensor 5 are both connected to a processor 6. The first distance sensor 4 is capable of measuring the horizontal longitudinal dimension and the vertical dimension of an object at height, and the second distance sensor 5 is capable of measuring the horizontal transverse dimension of an object at height. The size of the high object can be obtained after conversion. A communication device 25 is also provided on the processor 6. The communication device 25 can transmit the information on the processor 6 to other devices, so as to realize information sharing and interconnection. The communication device 25 may be a wired communication device 25, such as an RS232 interface, an RS485 interface, and the like. The communication device 25 may also be a wireless communication device, such as WIFI, bluetooth, ZigBee, near field communication device, or the like. The sensing assembly 1 is also provided with a reset button 7, and the reset button 7 is electrically connected with the processor 6. A reset button 7 is provided to control the timing of starting the calculation of the distance.
The self-balancing stabilizing device 2 comprises a universal rotating mechanism and a balancing mechanism 9. The sensing assembly 1 is arranged on the universal rotating mechanism, and the balance mechanism 9 is arranged on the sensing assembly 1. The balance mechanism 9 can keep the orientations of the first distance sensor 4 and the second distance sensor 5 stable. The self-balancing stabilizing device 2 can keep the angles of the first distance sensor 4 and the second distance sensor 5 constant, and the measuring error caused by shaking generated in the moving process is avoided.
The universal rotating mechanism is a universal ball 8, the universal ball 8 comprises a shell 10 and a ball 11, the ball 11 is hollow, and the sensing assembly 1 and the balance mechanism 9 are both arranged in the ball 11. The first distance sensor 4 and the second distance sensor 5 of the sensor assembly 1 protrude beyond the spherical surface of the ball 11. The universal ball 8 enables the angles of the first and second distance sensors 4 and 5 to be locally adjusted regardless of the shake in that direction, so that the first and second distance sensors 4 and 5 on the universal ball 8 return to the initial positions.
The balance mechanism 9 is a gyroscope 15, a motor 16 is arranged on the gyroscope 15, and the gyroscope 15 is driven to rotate by the motor 16. The motor 16 is electrically connected to the processor 6. The gyroscope 15 is hinged with the inner wall of the ball 11 of the universal ball 8. The angle of the first distance sensor 4 and the angle of the second distance sensor 5 are ensured to be constant by utilizing the principle that the axis of the gyroscope 15 is stable.
The universal ball 8 is also provided with a magnetic positioning assembly 12, the magnetic positioning assembly 12 comprises a first magnet 13 and a second magnet 14, and the magnetic pole directions of the first magnet 13 and the second magnet 14 are the same. The first magnet 13 is disposed on the ball 11 of the universal ball 8, the second magnet 14 is disposed on the side surface of the housing 10 close to the ball 11, and the second magnet 14 is disposed opposite to the first magnet 13. The magnetic positioning device is arranged, so that the position of the universal ball 8 can be kept when the gyroscope 15 rotates, and the universal ball 8 and the gyroscope 15 are prevented from rotating along with each other.
The glide assembly 3 comprises a frame 17, a vertical glide 18 and a horizontal glide 19. The vertical sliding device 18 comprises a vertical sliding rail 20 arranged on the frame 17, a first sliding block 21 is arranged on the vertical sliding rail 20, and the sensing assembly 1 is arranged on the first sliding block 21. The horizontal sliding device 19 comprises a horizontal transverse slide rail 22 and a horizontal longitudinal slide rail 23 which are arranged in a vertical crossing manner. The bottom of the frame 17 is provided with a second sliding block 24, and the second sliding block 24 can slide on the horizontal transverse sliding rail 22 and the horizontal longitudinal sliding rail 23. The sliding component 3 is arranged, the first distance sensor 4 and the second distance sensor 5 can move smoothly through the sliding component 3, and errors caused by handheld movement can be further reduced.
The use of this embodiment is as follows: the sensing assembly 1 is disposed on the first slider 21 of the sliding assembly 3. The first slider 21 is disposed on the vertical slide rail 20 of the frame 17. The frame 17 is arranged in a horizontal displacement device 19. The second slider 24 is moved along the horizontal lateral slide rail 22 while keeping the position of the first slider 21 constant, and the distance information collected by the second distance sensor 5 can be converted into the size of the object in the horizontal lateral direction. Keeping the position of the first slide 21 unchanged, moving the second slide 24 along the horizontal longitudinal slide rail 23, and converting the distance information collected by the first distance sensor 4 into the size of the object in the vertical direction. Keeping the position of the second slide 24 unchanged, moving the first slide 21 along the vertical slide 20 of the frame 17, the distance information collected by the first distance sensor 4 can be converted into the size of the object along the horizontal longitudinal direction.
Example 2: a measuring method for measuring high objects from the ground for construction engineering is suitable for the device for measuring high objects from the ground for construction engineering, and comprises the following steps:
keeping the position of the first slider 21 unchanged, the frame 17 is moved along the horizontal transverse slide 22. When the first distance sensor 4 moves to the edge of the object to be measured, the reset button 7 is pressed. The frame 17 is moved toward the other side edge of the object to be measured in the horizontal direction, and the measurement value a of the second distance sensor 5 is acquired at a set sampling interval Δ t. When the first distance sensor 4 moves to the other side edge of the object to be measured, recording is stopped. The maximum value of a is calculated a 1. The sampling interval Δ t is preferably 20 ms. The first and second distance sensors 4, 5 can thus be powered by a 50Hz power supply, such as mains electricity.
Keeping the position of the first slide 21 unchanged, the frame 17 is moved along the horizontal longitudinal slide 23. When the first distance sensor 4 moves to the edge of the object to be measured, the reset button 7 is pressed. The frame 17 is moved to the other side edge of the object to be measured in the horizontal and longitudinal directions, and the measurement value b of the first distance sensor 4 is acquired at a set sampling interval Δ t. When the first distance sensor 4 moves to the other side edge of the object to be measured, recording is stopped. The maximum value b1 of b and the minimum value b2 of b are calculated.
Keeping the position of the second slider 24 unchanged, the first slider 21 is moved along the vertical slide 20. When the first distance sensor 4 moves to the edge of the object to be measured, the reset button 7 is pressed. The first slider 21 is moved to the other side edge of the object to be measured in the vertical direction, and the measurement value c of the first distance sensor 4 is acquired at a set sampling interval Δ t. When the first distance sensor 4 moves to the other side edge of the object to be measured, recording is stopped. The maximum value c1 of c and the minimum value c2 of c are calculated.
The dimension of the object in the vertical direction can be obtained by the following calculation: a = a1, B = (B1-B2) × sin α, C = (C1-C2) × cos α; wherein, A is the size of the object along the horizontal transverse direction, B is the size of the object along the vertical direction, and C is the size of the object along the horizontal longitudinal direction.
The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.
Claims (9)
1. A device for measuring high objects from the ground for construction engineering is characterized in that: comprises a sensing assembly (1); the sensing assembly (1) comprises a first distance sensor (4), a second distance sensor (5) and a processor (6), wherein the second distance sensor (5) is horizontally arranged, the first distance sensor (4) is positioned in a vertical plane, and an included angle between the first distance sensor (4) and the horizontal plane is alpha; the first distance sensor (4) and the second distance sensor (5) are both connected with the processor (6); the first distance sensor (4) can measure the horizontal longitudinal dimension and the vertical dimension of an object at a high position, and the second distance sensor (5) can measure the horizontal transverse dimension of the object at a high position;
the device also comprises a sliding assembly (3) which comprises a rack (17), a vertical sliding device (18) and a horizontal sliding device (19); the vertical sliding device (18) comprises a vertical sliding rail (20) arranged on the rack (17), a first sliding block (21) is arranged on the vertical sliding rail (20), and the sensing assembly (1) is arranged on the first sliding block (21); the horizontal sliding device (19) comprises horizontal transverse sliding rails (22) and horizontal longitudinal sliding rails (23) which are vertically crossed; and a second sliding block (24) is arranged at the bottom of the rack (17), and the second sliding block (24) can slide on the horizontal transverse sliding rail (22) and the horizontal longitudinal sliding rail (23).
2. A device for measuring high objects from the ground for construction work according to claim 1, wherein: the self-balancing stabilizing device (2) is also included; the self-balancing stabilizing device (2) comprises a universal rotating mechanism and a balancing mechanism (9); the sensing assembly (1) is arranged on the universal rotating mechanism, and the balancing mechanism (9) is arranged on the sensing assembly (1); the balance mechanism (9) can keep the orientations of the first distance sensor (4) and the second distance sensor (5) stable.
3. A device for measuring high objects from the ground for construction work according to claim 2, wherein: the universal rotating mechanism is a universal ball (8), the universal ball (8) comprises a shell (10) and a ball (11), and the sensing assembly (1) and the balance mechanism (9) are arranged in the ball (11).
4. A device for measuring high objects from the ground for construction work according to claim 3, wherein: the balance mechanism (9) is a gyroscope (15), a motor (16) is arranged on the gyroscope (15), and the gyroscope (15) is driven to rotate by the motor (16); the motor (16) is electrically connected with the processor (6).
5. An apparatus for measuring a high object from the ground for construction work according to claim 4, wherein: the universal ball (8) is also provided with a magnetic positioning assembly (12), the magnetic positioning assembly (12) comprises a first magnet (13) and a second magnet (14), and the magnetic pole directions of the first magnet (13) and the second magnet (14) are the same; the first magnet (13) is arranged on a ball (11) of the universal ball (8), the second magnet (14) is arranged on the side face, close to the ball (11), of the shell (10), and the second magnet (14) is arranged opposite to the first magnet (13).
6. A device for measuring high objects from the ground for construction work according to claim 1, wherein: the processor (6) is also provided with a communication device (25).
7. A device for measuring high objects from the ground for construction work according to claim 1, wherein: the sensing assembly (1) is further provided with a reset button (7), and the reset button (7) is electrically connected with the processor (6).
8. A measuring method for measuring high objects from the ground for construction engineering is characterized in that: an apparatus for measuring high objects from the ground for construction work, suitable for use in claims 1-7, comprising the steps of:
keeping the position of the first sliding block (21) unchanged, and enabling the rack (17) to move along the horizontal transverse sliding rail (22);
when the first distance sensor (4) moves to the edge of the object to be measured, a reset button (7) is pressed; the frame (17) is moved to the edge of the other side of the object to be measured along the horizontal direction, and the measured value a of the second distance sensor (5) is collected according to the set sampling interval delta t;
when the first distance sensor (4) moves to the edge of the other side of the object to be measured, stopping recording;
calculating the maximum value a1 of a;
keeping the position of the first sliding block (21) unchanged, and enabling the rack (17) to move along the horizontal longitudinal sliding rail (23);
when the first distance sensor (4) moves to the edge of the object to be measured, a reset button (7) is pressed; the frame (17) is moved to the edge of the other side of the object to be measured along the horizontal and longitudinal directions, and the measured value b of the first distance sensor (4) is collected according to the set sampling interval delta t;
when the first distance sensor (4) moves to the edge of the other side of the object to be measured, stopping recording;
calculating the maximum value b1 of b and the minimum value b2 of b;
keeping the position of the second slide block (24) unchanged, and enabling the first slide block (21) to move along the vertical slide rail (20);
when the first distance sensor (4) moves to the edge of the object to be measured, a reset button (7) is pressed; the first sliding block (21) is made to move towards the edge of the other side of the object to be measured along the vertical direction, and the measured value c of the first distance sensor (4) is collected according to the set sampling interval delta t;
when the first distance sensor (4) moves to the edge of the other side of the object to be measured, stopping recording;
calculating the maximum value c1 of c and the minimum value c2 of c;
obtaining the size of the object along the vertical direction: a = a1, B = (B1-B2) × sin α, C = (C1-C2) × cos α; wherein, A is the size of the object along the horizontal transverse direction, B is the size of the object along the vertical direction, and C is the size of the object along the horizontal longitudinal direction.
9. A measuring method for measuring a high object from the ground for construction work according to claim 8, wherein: the sampling interval Δ t is 20 ms.
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| CN201810085323.3A CN110095094B (en) | 2018-01-29 | 2018-01-29 | Device for measuring high object from ground for constructional engineering and measuring method thereof |
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| CN201810085323.3A CN110095094B (en) | 2018-01-29 | 2018-01-29 | Device for measuring high object from ground for constructional engineering and measuring method thereof |
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| CN110095094B true CN110095094B (en) | 2020-12-15 |
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| CN102679929A (en) * | 2012-06-04 | 2012-09-19 | 山东金马精汇天成精密技术有限公司 | Horizontal arm type three-coordinate measuring and ruling machine |
| CN203672347U (en) * | 2014-01-02 | 2014-06-25 | 宁波市镇海压铸厂 | Three-coordinate measuring instrument |
| CN106323192A (en) * | 2015-06-23 | 2017-01-11 | 河南理工大学 | Longitudinal welded pipe welding seam protrusion detecting system based on laser scanning |
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- 2018-01-29 CN CN201810085323.3A patent/CN110095094B/en active Active
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|---|---|---|---|---|
| CN1045645A (en) * | 1989-03-07 | 1990-09-26 | 沃纳-斯沃斯公司 | The coordinate measuring machine that improves carriage drive system is arranged |
| JPH0599617A (en) * | 1991-03-22 | 1993-04-23 | Carl Zeiss:Fa | Method and device for detecting edge section and hole by optical scanning head |
| CN102472615A (en) * | 2009-07-03 | 2012-05-23 | 莱卡地球系统公开股份有限公司 | Coordinate measuring machine (cmm) and method of compensating errors in a cmm |
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| CN106323192A (en) * | 2015-06-23 | 2017-01-11 | 河南理工大学 | Longitudinal welded pipe welding seam protrusion detecting system based on laser scanning |
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