CN112325782A - Method and device for measuring radius of arc-shaped workpiece in real time - Google Patents
Method and device for measuring radius of arc-shaped workpiece in real time Download PDFInfo
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- CN112325782A CN112325782A CN202011197400.8A CN202011197400A CN112325782A CN 112325782 A CN112325782 A CN 112325782A CN 202011197400 A CN202011197400 A CN 202011197400A CN 112325782 A CN112325782 A CN 112325782A
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Abstract
The invention discloses a method and a device for measuring the radius of a circular arc workpiece in real time, which comprises the steps of constructing a laser ranging sensor combination, and placing the laser ranging sensor combination in an alignment way with the circular arc surface of the circular arc workpiece to be measured; the laser ranging sensor assembly comprises a first laser ranging sensor module and a second laser ranging sensor module which are installed at a fixed included angle, and a third laser ranging sensor module which is installed at a fixed included angle with the second laser ranging sensor module. The device and the using method thereof can not only measure static workpieces, but also measure dynamic workpieces in the machining process in real time without contacting the workpieces; the device has the advantages of small quantity of sensors and parts, simple and clear device body, low manufacturing cost and convenient maintenance; the volume of the device body is small, the device body can be moved according to the actual situation, and the use is convenient; the measurement process is quick and visual, other extra complicated operations are not needed, meanwhile, higher measurement precision can be kept, and measurement errors are reduced.
Description
Technical Field
The invention belongs to the technical field of industrial measurement, and particularly relates to a method and a device for measuring the radius of a circular arc-shaped workpiece in real time.
Background
In the machine industry, many arc-shaped or cylindrical workpieces, such as large workpieces like cylinders formed by rolling steel plates, are produced, and the finished workpieces require workers to measure the radial dimension to determine the accuracy of the workpiece. At present, the most widely used tool for measuring the radius of the arc-shaped workpiece is a vernier caliper, the vernier caliper clamps the arc-shaped workpiece through a measuring jaw, then scale values on a main ruler and the vernier are read, the read values are diameter data of the arc-shaped or cylindrical workpiece, but some large workpieces are often inconvenient to measure, the measurement precision is not high enough, manual reading is easy to cause errors, the time consumed by measurement is more, and the working efficiency of workers is reduced.
In the prior art, the device mainly adopts an indirect measuring method of a circumference three-point contact measuring method to measure the outer diameter of an arc-shaped or cylindrical workpiece, adopts two angle arm structures with fixed angles, and directly reacts the change of the diameter of the workpiece to be measured through the displacement of a grating ruler contact head. The measuring instrument has the advantages of high measuring precision, high measuring speed, complex structure and high cost, needs to be adjusted and erected in advance when in use, cannot be put into use quickly, is suitable for professional personnel to use, and is difficult to meet the requirements of common workers on simplicity and speed during operation. A device (application number 201611074616.9) for measuring the diameter of a cylindrical part mainly adopts four light ranging sensors to be distributed around a groove, the part is stretched into the groove to measure the distance of the part, and the diameter is calculated by utilizing the inscribed quadrilateral principle of a circle and then is displayed by a display device. However, this device can only measure a few small parts and is relatively rigid in use, inconvenient to operate and relatively inefficient. A method for measuring the internal diameter of circular hole in non-contact mode at multiple points (application No. 201510227421.2) features that a fixed-value comparison measuring head with three or four sensors is used to make the sensors distributed around the circle to form a triangular circumscribed circle or X-Y coordinate axis.
Moreover, most devices and methods for measuring the radius or the diameter can only measure the finished workpiece after machining, cannot monitor whether the radius of the workpiece meets the requirements in real time in the machining process, and are difficult to help designers to observe links with problems.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for measuring the radius of a circular arc-shaped workpiece in real time, and an apparatus for measuring the real-time radius of a circular arc-shaped workpiece during a stationary and machining process, which is simple and easy to operate, and a method for using the same.
In order to achieve the purpose, the technical scheme is as follows:
a method for measuring the radius of a circular arc-shaped workpiece in real time is applied to a measuring device and comprises the following steps:
building a laser ranging sensor combination, and placing the laser ranging sensor combination in an alignment way with the arc surface of the arc-shaped workpiece to be measured;
wherein the laser ranging sensor combination comprises a fixed included angle theta1First and second laser ranging sensor modules mounted and at a fixed included angle theta2The laser line reverse extension lines of the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module are intersected at a point O;
the processing module acquires a first laser ranging sensor module, a second laser ranging sensor module and a third laser ranging sensor module, respectively measures the distance of the arc surface of the arc-shaped workpiece to be measured, and acquires the radius r of the arc-shaped workpiece through the following external triangle formula:
OA＝d1+d4 (5)
OB＝d2+d5 (6)
OC＝d3+d6 (7)
in the formula:
the point of the first laser ranging sensor module, which irradiates on the arc-shaped workpiece to be measured, is A point, and the distance is d1；
The point of the second laser ranging sensor module, which irradiates the arc-shaped workpiece to be measured, is a point B, and the distance is d2；
The point of the third laser ranging sensor module, which irradiates on the arc-shaped workpiece to be measured, is a point C, and the distance is d3；
d4、d5And d6Respectively the distances from the transmitting ends of the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module to the O point, and d4、d5And d6Is a known constant value;
wherein, the perpendicular bisector L of the AB connecting line1Perpendicular bisector L of the line connecting BC2The intersection point of the M, MA, MB and MC is the radius r of the arc-shaped workpiece;
substituting the formulas (2), (3), (4), (5), (6) and (7) into the formula (1), and calculating to obtain r;
in addition, the laser lines of the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module are on the same plane, and meanwhile, the laser lines of the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module are perpendicular to the axis of the arc-shaped workpiece to be measured.
As a further improvement of the invention, an included angle theta is formed between the first laser ranging sensor module and the second laser ranging sensor module1And the included angle theta between the second laser ranging sensor module and the third laser ranging sensor module2All are 0-5 degrees to ensure small measurement error and more accurate radius r.
The device for measuring the radius of the circular arc-shaped workpiece in real time is characterized by comprising the following steps of:
the laser ranging sensor assembly arranged on the device body comprises a first laser ranging sensor module, a second laser ranging sensor module and a third laser ranging sensor module;
and the processing module is arranged on the device body and is used for controlling the combination of the laser ranging sensors.
As a further improvement of the present invention, the processing module further comprises a display module for displaying the value of r in real time.
As a further improvement of the invention, the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module respectively comprise a laser transmitter and a signal transmitting and receiving device for information transmission with the processing module.
As a further improvement of the invention, the system also comprises a power supply for supplying power to the laser ranging sensor combination and the processing module.
The invention has the beneficial effects that: the device and the using method thereof can not only measure the static arc-shaped workpiece, but also measure the dynamic arc-shaped workpiece in the machining process in real time without contacting the workpiece; the device has the advantages of small quantity of sensors and parts, simple and clear device body, low manufacturing cost and convenient maintenance; the volume of the device body is small, the device body can be moved according to the actual situation, and the use is convenient; the measurement process is quick and visual, other extra complicated operations are not needed, meanwhile, higher measurement precision can be kept, and measurement errors are reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram of a method of using the first embodiment of the present invention;
FIG. 3 is a schematic diagram of a method of using a second embodiment of the present invention;
FIG. 4 is a schematic diagram of geometric calculations in the method of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Please refer to fig. 1-4:
example one
A method for measuring the radius of a circular arc-shaped workpiece in real time is applied to a measuring device and comprises the following steps:
building a laser ranging sensor combination 2, and horizontally aligning the laser ranging sensor combination 2 to the inner arc surface of the arc-shaped workpiece to be measured;
wherein, the laser ranging sensor combination 2 comprises a fixed included angle theta1A first laser ranging sensor module 21 and a second laser ranging sensor module 22 installed and at a fixed included angle theta2The second laser ranging sensor module 22 and the third laser ranging sensor module 23 are installed, and the reverse extension lines of the laser lines of the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 are intersected at a point O;
the processing module 3 obtains the distances from the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 to the arc surfaces of the arc-shaped workpieces to be measured respectively, and obtains the radius r of the arc-shaped workpieces through the following external triangle formula:
OA＝d1+d4 (5)
OB＝d2+d5 (6)
OC＝d3+d6 (7)
in the formula:
first laser ranging sensor module 21 illuminationThe point on the arc workpiece to be measured is A point and the distance is d1；
The point of the second laser ranging sensor module 22 irradiated on the arc-shaped workpiece to be measured is a point B with a distance d2；
The point of the third laser ranging sensor module 23 which irradiates the arc-shaped workpiece to be measured is a point C with a distance d3；
d4、d5And d6The emitting ends of the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 are distances of O points, and d4、d5And d6Is a known constant value;
wherein, the perpendicular bisector L of the AB connecting line1Perpendicular bisector L of the line connecting BC2The intersection point of the M, MA, MB and MC is the radius r of the arc-shaped workpiece;
r is calculated by substituting formulae (2), (3), (4), (5), (6) and (7) for formula (1).
The laser lines of the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 are on the same plane; the laser lines of the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 are perpendicular to the axis of the arc-shaped workpiece to be measured.
An apparatus for real-time measurement of radius of a workpiece having a circular arc shape, the method comprising:
the laser ranging sensor assembly 2 arranged on the device body 1 comprises a first laser ranging sensor module 21, a second laser ranging sensor module 22 and a third laser ranging sensor module 23;
the processing module 3 is arranged on the device body 1 and used for controlling the laser ranging sensor assembly 2, the processing module 3 further comprises a display module used for displaying the numerical value of r in real time, and an observer can observe the change of the radius of the workpiece in real time;
and the power supply 4 is used for supplying power to the laser ranging sensor assembly 2 and the processing module 3.
The first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 all include a laser transmitter and a signal transmitter-receiver for transmitting information with the processing module 3.
Example two
A method for measuring the radius of a circular arc-shaped workpiece in real time is applied to a measuring device and comprises the following steps:
building a laser ranging sensor combination 2, and horizontally aligning the laser ranging sensor combination to the outer arc surface of the arc-shaped workpiece to be measured;
wherein, the laser ranging sensor combination 2 comprises a fixed included angle theta1A first laser ranging sensor module 21 and a second laser ranging sensor module 22 installed and at a fixed included angle theta2The laser ranging sensor module comprises a second laser ranging sensor module 22 and a third laser ranging sensor module 23, wherein the reverse extension lines of laser lines of the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 are intersected at a point O;
the processing module 3 obtains the distances from the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 to the arc surfaces of the arc-shaped workpieces to be measured respectively, and obtains the radius r of the arc-shaped workpieces through the following external triangle formula:
OA＝d1+d4 (5)
OB＝d2+d5 (6)
OC＝d3+d6 (7)
in the formula:
the point of the first laser ranging sensor module 21 irradiated on the arc-shaped workpiece to be measured is point A, and the distance is d1；
The point of the second laser ranging sensor module 22 irradiated on the arc-shaped workpiece to be measured is a point B with a distance d2；
The point of the third laser ranging sensor module 23 which irradiates the arc-shaped workpiece to be measured is a point C with a distance d3；
d4、d5And d6The emitting ends of the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 are distances of O points, and d4、d5And d6Is a known constant value;
wherein, the perpendicular bisector L of the AB connecting line1Perpendicular bisector L of the line connecting BC2The intersection point of the M, MA, MB and MC is the radius r of the arc-shaped workpiece;
r is calculated by substituting formulae (2), (3), (4), (5), (6) and (7) for formula (1).
The laser lines of the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 are on the same plane; the laser lines of the first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 are perpendicular to the axis of the arc-shaped workpiece to be measured.
An apparatus for real-time measurement of radius of a workpiece having a circular arc shape, the method comprising:
the laser ranging sensor assembly 2 arranged on the device body 1 comprises a first laser ranging sensor module 21, a second laser ranging sensor module 22 and a third laser ranging sensor module 23;
the processing module 3 is arranged on the device body 1 and used for controlling the laser ranging sensor assembly 2, the processing module 3 further comprises a display module used for displaying the numerical value of r in real time, and an observer can observe the change of the radius of the workpiece in real time;
and the power supply 4 is used for supplying power to the laser ranging sensor assembly 2 and the processing module 3.
The first laser ranging sensor module 21, the second laser ranging sensor module 22 and the third laser ranging sensor module 23 all include a laser transmitter and a signal transmitter-receiver for transmitting information with the processing module 3.
The first embodiment and the second embodiment disclose a scheme which can measure a static arc-shaped workpiece finished product and can also measure dynamic arc-shaped workpiece radius change in a machining process in real time; when the radius of the arc-shaped workpiece is measured, the radius can be measured from the outer surface of the arc-shaped workpiece, and can also be measured from the inner surface of the arc-shaped workpiece without contacting the arc-shaped workpiece; in addition, an included angle θ between the first laser ranging sensor module 21 and the second laser ranging sensor module 221And the angle theta between the second laser ranging sensor module 22 and the third laser ranging sensor module 232The measured error is small as much as possible, and is preferably controlled to be 0-5 degrees, so that the measured error is small, and the result is more accurate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for measuring the radius of a circular arc-shaped workpiece in real time is applied to a measuring device and is characterized by comprising the following steps:
building a laser ranging sensor combination, and placing the laser ranging sensor combination in an alignment way with the arc surface of the arc-shaped workpiece to be measured;
wherein the laser ranging sensor combination comprises a fixed included angle theta1First and second laser ranging sensor modules mounted and at a fixed included angle theta2The laser line reverse extension lines of the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module are intersected at a point O;
the processing module acquires a first laser ranging sensor module, a second laser ranging sensor module and a third laser ranging sensor module, respectively measures the distance of the arc surface of the arc-shaped workpiece to be measured, and acquires the radius r of the arc-shaped workpiece through the following external triangle formula:
OA＝d1+d4 (5)
OB＝d2+d5 (6)
OC＝d3+d6 (7)
in the formula:
the first laser ranging sensor module irradiates to be treatedThe point on the arc workpiece is measured as point A and the distance is d1；
The point of the second laser ranging sensor module, which irradiates the arc-shaped workpiece to be measured, is a point B, and the distance is d2；
The point of the third laser ranging sensor module, which irradiates on the arc-shaped workpiece to be measured, is a point C, and the distance is d3；
d4、d5And d6Respectively the distances from the transmitting ends of the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module to the O point, and d4、d5And d6Is a known constant value;
wherein, the perpendicular bisector L of the AB connecting line1Perpendicular bisector L of the line connecting BC2The intersection point of the M, MA, MB and MC is the radius r of the arc-shaped workpiece;
substituting the formulas (2), (3), (4), (5), (6) and (7) into the formula (1), and calculating to obtain r;
in addition, the laser lines of the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module are on the same plane, and meanwhile, the laser lines of the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module are perpendicular to the axis of the arc-shaped workpiece to be measured.
2. The method for measuring the radius of the circular arc-shaped workpiece in real time according to claim 1, wherein an included angle theta between the first laser ranging sensor module and the second laser ranging sensor module is1And the included angle theta between the second laser ranging sensor module and the third laser ranging sensor module2All are 0-5 degrees to ensure small measurement error and more accurate radius r.
3. An apparatus for real-time measurement of a radius of a workpiece having a circular arc shape, using the method of claim 1, comprising:
the laser ranging sensor assembly arranged on the device body comprises a first laser ranging sensor module, a second laser ranging sensor module and a third laser ranging sensor module;
and the processing module is arranged on the device body and is used for controlling the combination of the laser ranging sensors.
4. The apparatus of claim 3, wherein the processing module further comprises a display module for displaying the value of r in real time.
5. The device for measuring the radius of the circular-arc-shaped workpiece in real time as claimed in claim 3, wherein the first laser ranging sensor module, the second laser ranging sensor module and the third laser ranging sensor module each comprise a laser transmitter and a signal transmitter-receiver for information transmission with the processing module.
6. The apparatus of claim 3, further comprising a power source for providing power to the laser range sensor assembly and processing module.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459367A (en) * | 2022-01-12 | 2022-05-10 | 江苏首华智能装备有限公司 | Method for measuring actual diameter of carrier by area method |
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