CN115112029A - Device and method for measuring inner diameter of pipe end of steel pipe - Google Patents
Device and method for measuring inner diameter of pipe end of steel pipe Download PDFInfo
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- CN115112029A CN115112029A CN202110289394.7A CN202110289394A CN115112029A CN 115112029 A CN115112029 A CN 115112029A CN 202110289394 A CN202110289394 A CN 202110289394A CN 115112029 A CN115112029 A CN 115112029A
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- 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
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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Abstract
The invention discloses a device and a method for measuring the inner diameter of a pipe end of a steel pipe, wherein the device comprises the following steps: the moving mechanism is arranged at a detection station of the steel pipe to be detected; a rotation control mechanism mounted on the moving mechanism; the sensor is arranged on the rotary control mechanism and used for acquiring data of the distance and the angle of the inner wall of the steel pipe to be detected; the in-place signal detector is used for measuring in-place signals of the steel pipe to be measured; and the diameter model calculation unit is used for acquiring the data of the sensor and the signal of the in-place signal detector, performing calculation processing and contour modeling on the data, and calculating the inner diameter of the pipe end of the steel pipe to be measured. The invention adopts a non-contact on-line diameter measuring method, obtains the data point of the inner wall of the end part of the steel pipe by combining the measurement of the laser distance sensor and the angle sensor, forms a closed contour line after the whole circle measurement, and calculates the diameter data through the diameter calculation model, thereby accurately measuring the real inner diameter of the end part of the steel pipe.
Description
Technical Field
The invention relates to a measuring technology of a steel pipe production process, in particular to a device and a method for measuring the inner diameter of a pipe end of a steel pipe.
Background
The inner diameter of the pipe end is one of the most important control parameters in the production of steel pipes, and is also an important index which is primarily controlled by a steel pipe manufacturer and is guaranteed for a user, and the inner diameter of the pipe end has definite technical requirements at home and abroad. With the continuous progress of the pipeline on-site welding construction technology, the quality requirement on the steel pipe is continuously improved, and particularly the requirement on the inner diameter size of the pipe end is extremely strict. When the two pipes are welded in the field or in the sea, if the pipe end diameter of the steel pipe meets the requirement, the welding can be smoothly finished; on the contrary, the butt welding of the two pipes is difficult, and even if the two pipes can be welded together, a large residual stress can be generated, so that the mechanical performance of the welding seam is reduced, and the safety of the pipeline is reduced. Like an oil and gas conveying pipeline, a large amount of inflammable and explosive substances are conveyed, the internal pressure of dozens of even hundreds of atmospheres needs to be borne, and if the mechanical performance of a welding line is poor, leakage and explosion accidents are easy to happen. Especially like deep-sea pipeline pipes, the pipeline is influenced by ocean currents, tides and sea waves, has higher requirements on welding effect, and once the pipeline is broken, crude oil is leaked, ocean pollution events occur, huge ecological pollution is generated, and serious economic loss is caused. Due to the limitation of the production process, the steel pipe with the unqualified pipe end inner diameter still exists, and in order to screen out the qualified steel pipe and strictly monitor the production quality of the steel pipe, the detection work of the pipe end inner diameter index becomes an important part in the steel pipe production process flow.
The pipe end of the steel pipe refers to a part of the steel pipe or a pipe section within a specified length range from the two end heads of the steel pipe, different standards have different specifications on the length of the pipe section, such as the American Petroleum Institute (API) standard on pipeline steel, and the pipe end refers to the steel pipe within the length range of 100mm (4.0in) of each end head of the steel pipe. The measurement of the inner diameter of the pipe end is actually the measurement of the position coordinate of the inner wall profile of the cross section of the steel pipe end in a three-dimensional space, the cross section of the seamless steel pipe is in a ring shape, the simplest method for measuring the inner diameter is to directly measure the distance from each point on the inner wall of the ring to the circle center, and the method has the difficulty that how to accurately determine the position of the circle center needs an accurate centering method and corresponding equipment, which brings many problems for the field application of industrial production and has low practicability. At present, in actual production, the inner diameter dimension of a pipe end is mainly detected by a manual measurement method, and the manual measurement is generally carried out by using an equivalent instrument such as a caliper and a micrometer.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for measuring the inner diameter of the end of a steel pipe.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, an apparatus for measuring an inner diameter of a pipe end of a steel pipe includes:
the moving mechanism is arranged at a detection station of the steel pipe to be detected;
a rotation control mechanism mounted on the moving mechanism;
the sensor is arranged on the rotary control mechanism and used for acquiring data of the distance and the angle of the inner wall of the steel pipe to be detected;
the in-place signal detector is used for measuring an in-place signal of the steel pipe to be measured;
the process signal interface unit and the diameter model calculation unit are used for receiving the specification data and the detection standard of the steel pipe to be detected;
the diameter model calculation and control unit is used for acquiring data of the sensor and signals of the in-place signal detector, performing calculation processing and contour modeling on the data, and calculating the inner diameter of the pipe end of the steel pipe to be measured; and
and controlling the movement of the moving mechanism and the rotation control mechanism.
Preferably, the moving mechanism comprises a horizontal moving mechanism arranged on the detection station, and an up-down lifting mechanism arranged on the horizontal moving mechanism;
the rotation control mechanism is arranged on the up-down lifting mechanism.
Preferably, the rotation control mechanism is provided with an adjusting rotating arm.
Preferably, the sensor comprises:
the laser distance sensor is arranged on the adjusting rotating arm and used for measuring the distance of the inner wall of the steel pipe to be measured;
the angle sensor is used for measuring a rotation angle value of the laser distance sensor;
and the anti-collision sensor is arranged at the front end part of the adjusting rotating arm and used for detecting an anti-collision signal of the adjusting rotating arm.
Preferably, the device further comprises a V-shaped supporting device for placing the steel pipe to be detected, and the in-place signal detector is located at the position of the V-shaped supporting device.
Preferably, the diameter model calculation and control unit calculates the inner diameter of the pipe end of the steel pipe to be measured by the following steps:
marking the position of the laser distance sensor inside the pipe end of the steel pipe to be detected as O';
the measurement starting point is marked as A;
the measuring point mark B after the measuring initial point A deviates the angle theta;
measuring the distance O ' B between the position O ' of the laser distance sensor and the measuring point B and marking the distance O ' B as R;
obtaining a group of distance data and angle data relative to the measuring point B, and adjusting the angle at equal intervals delta theta to obtain a distance data and angle data group which rotates for a circle by the measuring starting point A, so as to form a circular contour line in the pipe end of the steel pipe to be measured;
and finding out the longest chord length value according to the circular contour line in the pipe end of the steel pipe to be detected, namely the pipe end inner diameter of the steel pipe to be detected.
On the other hand, a steel pipe end inner diameter measuring method used for the steel pipe end inner diameter measuring apparatus:
and measuring and acquiring the data of the inner wall of the end part of the steel pipe to be measured by combining the laser distance sensor with the angle sensor, forming a closed contour line after measuring the whole circumference, and calculating the diameter data by the diameter model calculating unit so as to measure the inner diameter of the end part of the steel pipe to be measured.
Preferably, the method for measuring the inner diameter of the pipe end of the steel pipe specifically comprises the following steps:
1) horizontally placing the steel pipe to be detected on a measuring station, arranging a detecting station right opposite to the measuring station, and mounting a pipe end inner diameter measuring device of the steel pipe on the detecting station;
2) when the in-place signal detector detects that the steel pipe to be detected exists at the measuring station, the process signal interface unit receives the specification of the steel pipe to be detected, and the diameter model calculation unit controls and adjusts the up-down lifting mechanism to enable the central line of the rotary control mechanism and the axis of the steel pipe to be detected to be at the same height;
3) the diameter model calculation unit controls and drives the horizontal moving mechanism to enable the laser distance sensor to move towards the direction of the steel pipe to be measured and extend into a position of a certain point inside the pipe end of the steel pipe to be measured, the distance value of the inner wall of the section of the point is measured, and the position is taken as a measurement starting point;
4) the diameter model calculation unit controls the rotation control mechanism to enable the laser distance sensor to rotate around the axis of the steel pipe to be measured at a constant angular speed;
5) the laser distance sensor is matched with the angle sensor to obtain the current angle data of the laser distance sensor in the rotating process;
6) the diameter model calculation unit synchronously acquires the distance value of the laser distance sensor and the angle data of the angle sensor;
7) the laser distance sensor rotates for a circle at the measurement starting point in the pipe end of the steel pipe to be measured to form profile data, and the diameter model calculation unit stops rotating the rotation control mechanism and drives the horizontal movement mechanism to reset;
8) and the diameter model calculation unit calculates an inner diameter value according to a steel pipe diameter calculation method through the acquired profile data, and finally obtains the pipe end inner diameter of the current steel pipe to be measured.
Preferably, the method for calculating the diameter of the steel pipe is as follows:
the position of the laser distance sensor inside the pipe end of the steel pipe to be detected is marked as O';
the measurement starting point is marked as A;
the measuring point mark B after the measuring initial point A deviates the angle theta;
measuring the distance O ' B between the position O ' of the laser distance sensor and the measuring point B and marking the distance O ' B as R;
obtaining a group of distance data and angle data relative to the measuring point B, and adjusting the angle at equal intervals delta theta to obtain a distance data and angle data group which rotates for one circle by the measuring starting point A, so as to form a circular contour line inside the pipe end of the steel pipe to be measured;
and finding out the longest chord length value according to the circular contour line in the pipe end of the steel pipe to be detected, namely the pipe end inner diameter of the steel pipe to be detected.
The invention provides a device and a method for measuring the inner diameter of a pipe end of a steel pipe, and provides a method for measuring the inner diameter of the end part of the steel pipe based on data of multiple sensors.
Drawings
FIG. 1 is a schematic view showing the structure of a pipe end inside diameter measuring apparatus of a steel pipe according to the present invention;
FIGS. 2 and 3 are schematic diagrams illustrating the method for measuring the inner diameter of the end of a steel pipe according to the present invention;
FIG. 4 is a schematic flow chart of a method for measuring the inner diameter of the end of a steel pipe according to the present invention.
Detailed Description
In order to better understand the technical solutions of the present invention, the following further describes the technical solutions of the present invention with reference to the accompanying drawings and examples.
The horizontal moving mechanism 1, the vertical lifting mechanism 2 and the rotary control mechanism 3 form a moving mechanism, and the moving mechanism is arranged on a detection station which is right opposite to the steel pipe 11 to be detected and is away from the end face of the pipe end of the steel pipe 11 to be detected by a certain distance. The horizontal moving mechanism 1 is arranged on a detection station, is a motion control device, and receives a control signal output by the diameter model calculation unit 8 to drive the up-down lifting mechanism 2 to realize horizontal motion control. The up-down lifting mechanism 2 is arranged on the horizontal moving mechanism 1, is a motion control device, and receives a control signal output by the diameter model calculation unit 8 to drive the rotation control mechanism 3 to realize up-down motion control. The rotation control mechanism 3 is installed on the up-down lifting mechanism 2, is a motion control device, and receives a control signal output by the diameter model calculation unit 8 to drive the laser distance sensor 5 to realize rotation motion control.
The rotation control mechanism 3 is provided with a horizontally installed adjusting rotating arm 31, which is a sensor for measuring distance and is arranged towards the direction of the steel pipe 11 to be measured, and is used for measuring the distance value to the inner wall of the pipe end of the steel pipe 11 to be measured and transmitting the result to the diameter model calculation unit 8 in real time.
The laser distance sensor 5 is installed on the adjusting rotating arm 31 near the front end, and is used for measuring a distance value from a certain point inside the pipe end of the steel pipe 11 to be measured to the inner wall of the pipe end of the steel pipe 11 to be measured.
The collision avoidance detector 4 is installed at the front end of the adjusting rotary arm 31, is a proximity sensor, and is used to detect a collision avoidance signal, and when an object is detected in front, the collision avoidance signal is output to the diameter model calculating unit 8.
The angle sensor 6 is installed on the rotation control mechanism 3, is a sensor for measuring an angle, and is used for measuring a value of the angle of rotation of the laser distance sensor 5 and transmitting the result to the diameter model calculation unit 8 in real time.
The rotation control mechanism 3 drives the adjusting rotating arm 31 to drive the laser distance sensor 5 and the angle sensor 6 to rotate around the central axis of the steel pipe 11 to be measured for a circle, and the distance value and the angle value of each point of the circle on the inner wall of the section of the end part of the steel pipe 11 to be measured are measured.
The diameter model calculation unit 8 is a computer device having distance and angle data acquisition, processing, contour modeling, data calculation processing, inner diameter model calculation, and horizontal, up-down, and rotational motion control functions. The diameter model calculation unit 8 receives data such as relevant angles, distances, collision avoidance signals, in-place signals, specifications and detection standards of the steel pipe 11 to be detected and the like transmitted by the angle sensor 6, the laser distance sensor 5, the collision avoidance detector 4, the in-place signal detector 7 and the process signal interface unit 9, and obtains the inner diameter of the pipe end of the steel pipe 11 to be detected through calculation and analysis of the diameter model.
The process signal interface unit 9 is a data signal communication device, is connected with the diameter model calculation unit 8, and is used for receiving the specification data and the detection standard of the steel pipe 11 to be detected and outputting the data information to the diameter model calculation unit 8.
The V-shaped supporting device 10 is a supporting and positioning device, and is provided with one or more than one for horizontally placing the steel pipe 11 to be measured.
The in-place signal detector 7 is installed at the position of the V-shaped supporting device 10, is a device for measuring whether the steel pipe 11 to be measured reaches a measuring station, and outputs a signal to the diameter model calculation unit 8 when the steel pipe 11 to be measured is in place.
In embodiment 2, referring to fig. 1 again, the present invention further provides a method for measuring an inner diameter of a pipe end of a steel pipe, in which a steel pipe 11 to be measured is horizontally placed on a V-shaped supporting device 10 of a measuring station, and the pipe end inner diameter measuring device of the steel pipe in embodiment 1 is installed on a detecting station facing the measuring station and spaced from an end of the steel pipe 11 to be measured by a certain distance. The diameter model calculation unit 8 controls and adjusts the height of the laser distance sensor 5 and the horizontal position from the end of the steel pipe 11 to be measured. The method comprises the steps that a distance value from a certain point inside a pipe end of a steel pipe 11 to be measured to the inner wall of the pipe end of the steel pipe 11 to be measured is measured and obtained through a laser distance sensor 5, an angle value of the position of the current laser distance sensor 5 can be obtained through matching with an angle sensor 6, a rotation control mechanism 3 drives and adjusts a rotating arm 31 to drive the laser distance sensor 5, the angle sensor 6 rotates around the central axis of the steel pipe 11 to be measured for one circle, the distance value and the angle value of each point on the inner wall of the cross section of the end portion of the steel pipe 11 to be measured are measured, after all the distance values and the angle values measured by the laser distance sensor 5 and the angle sensor 6 are obtained, a circular contour line of the inner wall of the end portion of the steel pipe 11 to be measured is established through a diameter calculation model, and a diameter value is calculated, and the diameter value is the inner diameter of the steel pipe 11 to be measured.
Referring to fig. 4, the method for measuring the inner diameter of the pipe end of the steel pipe of the present invention specifically includes the following steps:
1) the diameter model calculation unit 8 measures the in-place signal of the steel pipe 11 to be detected on the detection station through the in-place signal detector 7, judges whether the steel pipe 11 to be detected enters the detection station, if so, the step 2) is carried out, and if not, the waiting is continued;
2) reading the specification and the detection standard data of the current steel pipe 11 to be detected through a process signal interface unit 9, and transmitting the data to a diameter model calculation unit 8;
3) the diameter model calculation unit 8 calculates the vertical height position of the rotation central axis of the laser distance sensor 5 according to the obtained specification of the steel pipe 11 to be measured, and controls the up-down lifting mechanism 2 to adjust the up-down height position;
4) after the upper and lower height positions are adjusted in place, the diameter model calculation unit 8 controls the horizontal movement mechanism 1 to enable the laser distance sensor 5 to move forwards towards the direction of the steel pipe 11 to be measured;
5) in the advancing process of the horizontal moving mechanism 1, the diameter model calculation unit 8 detects an anti-collision signal through the anti-collision detector 4, judges whether collision occurs or not, if so, finishes the measurement, and if not, enters the step 6);
6) after the steel pipe is moved to the detection position, the diameter model calculation unit 8 calculates the corresponding rotation speed omega according to the obtained specification and detection standard of the steel pipe 11 to be detected, and controls the rotation control mechanism 3 to drive the laser distance sensor 5 to rotate; because the steel pipes 11 to be measured of different specifications have different inner diameters and different detection standards and requirements, in order to ensure the measurement accuracy and consistency, the measurement points in the circumferential direction need to be uniformly distributed, that is, the included angles between the two measurement points are equal, and meanwhile, enough measurement data points need to be arranged. Under the condition that the measuring frequency of the laser distance sensor 5 is constant, the included angle is determined by the rotation angular velocity of the laser distance sensor 5, so that the required number of measuring points and the included angle between the measuring points are determined according to different specification sizes and detection standard requirements of the steel pipe 11 to be measured, and the rotation speed of the laser distance sensor 5 is calculated, wherein the higher the detection standard and the requirement are, the larger the specification of the steel pipe 11 to be measured is, the more the number of data points to be measured is, the smaller the included angle of the self-checking of the measuring points is, and the smaller the rotation angular velocity is;
7) the method comprises the following steps of acquiring and measuring distance and angle data on the inner wall of the pipe end of a steel pipe 11 to be measured in real time through a laser distance sensor 5 and an angle sensor 6, and transmitting the data to a diameter model calculation unit 8;
8) repeating the step 6) until the 360-degree full-circle measurement of the steel pipe 11 to be measured is completed, and entering the step 8) when the full-circle measurement is completed;
9) the diameter model calculation unit 8 controls the rotation control mechanism 3 to stop the laser distance sensor 5 from rotating, and controls the horizontal movement mechanism 1 to make the laser distance sensor 5 return to the original position;
10) the diameter model calculation unit 8 processes and analyzes the data of the whole circumference profile of the outer wall of the pipe end of the steel pipe 11 to be measured, and calculates an inner diameter value according to a steel pipe diameter calculation method;
11) and judging whether the measurement is finished or not, if not, feeding back to the step 1), and continuing to wait for the measurement of the new steel pipe.
The method for calculating the diameter of the steel pipe in the step 10) is specifically as follows:
referring to fig. 2, the central axis of the steel pipe 11 to be measured is marked as O;
the position of the laser distance sensor 5 inside the pipe end of the steel pipe 11 to be measured is marked as O', and is also the rotation central axis of the laser distance sensor 5;
the measurement starting point is marked as A;
the measurement point after the measurement start point a is offset by the angle θ is labeled B.
Because the radial position of the laser distance sensor 5 is fixed, the distance O' B between the laser distance sensor 5 and the inner wall of the pipe end of the steel pipe 11 to be measured is measured, namely the distance between the pipe wall and the rotation center at the current offset angle theta is obtained and marked as R, so that a group of distance and angle data (R, theta) can be obtained for the measuring point B. The angle is adjusted at equal intervals delta theta, and distance and angle data of a group of 360/delta theta inner wall circles (360/delta theta) of the end of the steel pipe 11 to be measured can be obtained. From these data, a circular contour of the inner wall of the steel pipe 11 to be measured can be established.
As shown in fig. 3, since the diameter of a circle is the chord with the largest length, the diameter value can be calculated from the inner wall circular contour line data. For example, with the measuring point B as a reference point, the distances from the point B to the rest points on the contour line are calculated, and the maximum distance, such as BD, is found to be the diameter value passing through the point B. According to the method, the diameter data of all the measuring points passing through the circular contour line of the inner wall can be calculated, so that the data such as the maximum diameter, the minimum diameter, the average diameter and the like of the pipe end of the steel pipe 11 to be measured can be obtained. It should be noted that the number of the measurement points in one circle on the inner wall of the pipe end of the steel pipe is determined by the interval angle theta, and needs to be determined according to specific measurement requirements and standards, and the smaller the value of theta is, the more the number of the measurement points is, and the higher the measurement accuracy is.
In embodiment 3, the steel pipe 11 to be measured is horizontally placed on a detection station, the in-place signal detector 7 detects that the steel pipe 11 to be measured arrives at the detection station, and the system is started. The diameter model calculation unit 8 collects data such as the specification and the detection standard of the current steel pipe 11 to be detected through the process signal interface unit 9.
The diameter model calculation unit 8 controls the vertical lifting mechanism 2 to vertically lift according to the specification information of the steel pipe 11 to be measured, and adjusts the height of the rotating arm 31, that is, the position of the rotating central axis where the laser distance sensor 5 is located is at the same height as the central axis of the steel pipe 11 to be measured currently. After the up-down position adjustment is completed, the diameter model calculation unit 8 controls the horizontal movement mechanism 1 to drive the up-down lifting mechanism 2 and the rotation control mechanism 3 to move towards the pipe end of the steel pipe 11 to be detected, so that the laser distance sensor 5 completely enters the position area of the steel pipe 11 to be detected, and the laser distance sensor 5 is ensured to be capable of detecting the inner wall of the pipe end of the steel pipe 11 to be detected. The pipe end inner diameter of the steel pipe 11 to be measured is an inner diameter value within a certain range from the end of the steel pipe, such as a pipeline, and the inner diameter value within a length range of 100mm of the pipe end according to the standard requirement should meet a certain requirement, so that the position of the laser distance sensor 5 must be within the length range of 100mm of the pipe end.
The diameter model calculation unit 8 calculates a corresponding rotation angular velocity ω according to the specification and the detection standard of the steel pipe 11 to be measured, and controls the rotation control mechanism 3 to operate, so that the adjusting rotating arm 31 drives the laser distance sensor 5 to perform circular motion at the rotation angular velocity ω inside the pipe end of the steel pipe 11 to be measured. Because the inner diameters of the steel pipes 11 to be measured of different specifications and types are different, and the detection standards and requirements are also different, in order to ensure the measurement accuracy and consistency, the measurement points on the circumferential direction of the steel pipes 11 to be measured need to be uniformly distributed, that is, the included angle θ between the two measurement points is equal, and a sufficient number of measurement points need to be provided. Under the condition that the measuring frequency of the laser distance sensor 5 is constant, the included angle theta is determined by the rotational angular velocity omega, and the number of required measuring points and the included angle theta between adjacent measuring points can be determined according to parameter information such as the specification, the detection standard and the requirement of the steel pipe 11 to be measured, so that the rotational angular velocity omega is determined. The higher the detection standard and requirement, the larger the specification of the steel pipe 11 to be measured, the more the number of the required measuring points is, the smaller the included angle theta between the measuring points is, and the smaller the rotational angular velocity omega is. In this example 3, θ is 0.5 °, and thus 720 measurement points are obtained in a total of one week.
In the process that the adjusting rotating arm 31 drives the laser distance sensor 5 to rotate, when the angle sensor 6 measures that the adjusting rotating arm 31 rotates by 0.5 degrees every time, the distance between the adjusting rotating arm and the inner wall of the steel pipe 11 to be measured is measured through the laser distance sensor 5, the radius distance value R and the inclination angle value alpha of the steel pipe 11 to be measured at the position are calculated, and after 360 degrees of a circle are measured, 720 groups of radius distance and angle data (R1,0.5), (R2, 1.0) … … (R720,360) and 720 inclination angle data alpha 1, alpha 2 … … alpha 720 are obtained.
The diameter model calculation unit 8 establishes a circular contour model about the inner wall of the steel pipe 11 to be measured according to the 720 sets of radius distances and angle data, and calculates an inner diameter value D to complete the measurement.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (9)
1. A pipe end inner diameter measuring device of a steel pipe, characterized by comprising:
the moving mechanism is arranged at a detection station of the steel pipe to be detected;
a rotation control mechanism mounted on the moving mechanism;
the sensor is arranged on the rotary control mechanism and used for acquiring data of the distance and the angle of the inner wall of the steel pipe to be detected;
the in-place signal detector is used for measuring an in-place signal of the steel pipe to be measured;
the process signal interface unit is used for receiving the specification data and the detection standard of the steel pipe to be detected;
the diameter model calculation and control unit is used for acquiring data of the sensor and signals of the in-place signal detector, performing calculation processing and contour modeling on the data, and calculating the inner diameter of the pipe end of the steel pipe to be measured; and
and controlling the movement of the moving mechanism and the rotation control mechanism.
2. The pipe end inner diameter measuring device of a steel pipe according to claim 1, characterized in that: the moving mechanism comprises a horizontal moving mechanism arranged on the detection station and an up-and-down lifting mechanism arranged on the horizontal moving mechanism;
the rotation control mechanism is installed on the up-down lifting mechanism.
3. The pipe end inner diameter measuring device of a steel pipe according to claim 2, characterized in that: and the rotation control mechanism is provided with an adjusting rotating arm.
4. The pipe end inner diameter measuring device of a steel pipe according to claim 3, wherein the sensor comprises:
the laser distance sensor is arranged on the adjusting rotating arm and used for measuring the distance between the inner walls of the steel pipes to be measured;
the angle sensor is used for measuring a rotation angle value of the laser distance sensor;
and the anti-collision sensor is arranged at the front end part of the adjusting rotating arm and used for detecting the anti-collision signal of the adjusting rotating arm.
5. The pipe end inner diameter measuring device of a steel pipe according to claim 1, further comprising a V-shaped support device for placing the steel pipe to be measured, wherein the in-place signal detector is located at a position of the V-shaped support device.
6. The pipe end inner diameter measuring device of a steel pipe according to claim 5, characterized in that: the diameter model calculation and control unit calculates the inner diameter of the pipe end of the steel pipe to be measured through the following steps:
marking the position of the laser distance sensor inside the pipe end of the steel pipe to be detected as O';
the measurement starting point is marked as A;
the measuring point mark B after the measuring initial point A deviates the angle theta;
measuring the distance O ' B between the position O ' of the laser distance sensor and the measuring point B and marking the distance O ' B as R;
obtaining a group of distance data and angle data relative to the measuring point B, and adjusting the angle at equal intervals delta theta to obtain a distance data and angle data group which rotates for a circle by the measuring starting point A, so as to form a circular contour line in the pipe end of the steel pipe to be measured;
and finding out the longest chord length value according to the circular contour line in the pipe end of the steel pipe to be detected, namely the pipe end inner diameter of the steel pipe to be detected.
7. A method for measuring an inner diameter of a pipe end of a steel pipe used in the apparatus for measuring an inner diameter of a pipe end of a steel pipe according to any one of claims 1 to 6, characterized in that:
and measuring and acquiring the data of the inner wall of the end part of the steel pipe to be measured by combining the laser distance sensor with the angle sensor, forming a closed contour line after measuring the whole circumference, and calculating the diameter data by the diameter model calculating unit so as to obtain the inner diameter of the end part of the steel pipe to be measured.
8. The method of measuring the inner diameter of the end of the steel pipe according to claim 7, wherein the method specifically comprises the steps of:
1) horizontally placing the steel pipe to be detected on a measuring station, arranging the detecting station right opposite to the measuring station, and mounting a pipe end inner diameter measuring device of the steel pipe on the detecting station;
2) when the in-place signal detector detects that the steel pipe to be detected exists at the measuring station, the process signal interface unit receives the specification of the steel pipe to be detected, and the diameter model calculation unit controls and adjusts the up-down lifting mechanism to enable the central line of the rotary control mechanism and the axis of the steel pipe to be detected to be at the same height;
3) the diameter model calculation unit controls and drives the horizontal moving mechanism to enable the laser distance sensor to move towards the direction of the steel pipe to be measured and extend into a position of a certain point inside the pipe end of the steel pipe to be measured, the distance value of the inner wall of the section of the point is measured, and the position is taken as a measurement starting point;
4) the diameter model calculation unit controls the rotation control mechanism to enable the laser distance sensor to rotate around the axis of the steel pipe to be measured at a constant angular speed;
5) the laser distance sensor is matched with the angle sensor to obtain the current angle data of the laser distance sensor in the rotating process;
6) the diameter model calculation unit synchronously acquires the distance value of the laser distance sensor and the angle data of the angle sensor;
7) the laser distance sensor rotates for a circle at the measurement starting point in the pipe end of the steel pipe to be measured to form profile data, and the diameter model calculation unit stops rotating the rotation control mechanism and drives the horizontal movement mechanism to reset;
8) and the diameter model calculation unit calculates an inner diameter value according to a steel pipe diameter calculation method through the acquired profile data, and finally obtains the inner diameter of the pipe end of the current steel pipe to be measured.
9. The method for measuring the inner diameter of the end of the steel pipe according to claim 8, wherein the method for calculating the diameter of the steel pipe is specifically as follows:
the position of the laser distance sensor inside the pipe end of the steel pipe to be detected is marked as O';
the measurement starting point is marked as A;
the measuring point mark B after the measuring initial point A deviates the angle theta;
measuring the distance O ' B between the position O ' of the laser distance sensor and the measuring point B and marking the distance O ' B as R;
obtaining a group of distance data and angle data relative to the measuring point B, and adjusting the angle at equal intervals delta theta to obtain a distance data and angle data group which rotates for a circle by the measuring starting point A, so as to form a circular contour line in the pipe end of the steel pipe to be measured;
and finding out the longest chord length value according to the circular contour line in the pipe end of the steel pipe to be detected, namely the pipe end inner diameter of the steel pipe to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289394.7A CN115112029A (en) | 2021-03-18 | 2021-03-18 | Device and method for measuring inner diameter of pipe end of steel pipe |
Applications Claiming Priority (1)
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| CN202110289394.7A CN115112029A (en) | 2021-03-18 | 2021-03-18 | Device and method for measuring inner diameter of pipe end of steel pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115854887A (en) * | 2023-02-20 | 2023-03-28 | 四川思创博睿工业设计有限公司 | Distance measuring mechanism and method |
| CN116295223A (en) * | 2023-03-16 | 2023-06-23 | 聊城市检验检测中心 | Intelligent automatic detection system and method for inner and outer walls of steel pipe |
| CN116336949A (en) * | 2022-12-29 | 2023-06-27 | 深圳市志奋领科技有限公司 | Measurement method, device, equipment and medium based on laser displacement |
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2021
- 2021-03-18 CN CN202110289394.7A patent/CN115112029A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116336949A (en) * | 2022-12-29 | 2023-06-27 | 深圳市志奋领科技有限公司 | Measurement method, device, equipment and medium based on laser displacement |
| CN116336949B (en) * | 2022-12-29 | 2024-02-13 | 深圳市志奋领科技有限公司 | Measurement method, device, equipment and medium based on laser displacement |
| CN115854887A (en) * | 2023-02-20 | 2023-03-28 | 四川思创博睿工业设计有限公司 | Distance measuring mechanism and method |
| CN115854887B (en) * | 2023-02-20 | 2023-05-16 | 四川思创博睿工业设计有限公司 | Distance measuring mechanism and method |
| CN116295223A (en) * | 2023-03-16 | 2023-06-23 | 聊城市检验检测中心 | Intelligent automatic detection system and method for inner and outer walls of steel pipe |
| CN116295223B (en) * | 2023-03-16 | 2024-06-04 | 聊城市检验检测中心 | Intelligent automatic detection system and method for inner and outer walls of steel pipe |
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