CN115371590B - Device and method for measuring outline shape of part and electronic equipment - Google Patents
Device and method for measuring outline shape of part and electronic equipment Download PDFInfo
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- CN115371590B CN115371590B CN202211299915.8A CN202211299915A CN115371590B CN 115371590 B CN115371590 B CN 115371590B CN 202211299915 A CN202211299915 A CN 202211299915A CN 115371590 B CN115371590 B CN 115371590B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/06—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring contours or curvatures
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Abstract
The invention provides a device and a method for measuring the shape of a part and electronic equipment, belonging to the technical field of measurement, wherein the device comprises: support frame, load-bearing platform, first drive mechanism, first actuating mechanism, non-contact range finder and treater. According to the part shape measuring device provided by the invention, the rotatable bearing platform is arranged to drive the part to be measured to rotate, the circumferential sizes of the part to be measured at a certain height position can be conveniently measured, after circumferential size data at different height positions are measured, the non-contact distance measuring device can acquire distance data between the non-contact distance measuring device and the surface of the part to be measured at different positions, the processor can automatically control the measuring process and acquire accurate shape data of the part to be measured according to the measured data, so that the shape size of the part can be accurately and conveniently acquired, the detection difficulty is reduced, and the accuracy of the detected data is improved.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a device and a method for measuring the shape of a part and electronic equipment.
Background
In the related art, the shape and size of the outer surface of a rotating part are generally measured in various ways. For regular cylindrical parts, the diameter, height and the like of the parts can be measured by measuring tools such as calipers and the like, and then the external dimensions of the parts can be obtained. The measuring tool such as a caliper is adopted, only a certain local size of the part can be measured, and the measurement of the appearance of the whole part is replaced. Due to factors such as errors in the machining process of the part, different differences exist in all parts of the part, the overall dimension of the part cannot be accurately reflected by a small amount of measurement data, and the measurement mode can affect the subsequent process, the actual use and the like.
For parts with complex shapes, a 3D scanner can be adopted to scan the appearance of the parts, and then the appearance size of the parts can be obtained. And adopt 3D scanner, not only its price is more expensive, and need carry out complicated leading operation to the part usually, and part leading operation can damage the part surface even, and the operation is comparatively inconvenient.
On the basis of the above, a need exists for an accurate and convenient measuring device for detecting the appearance of a part.
Disclosure of Invention
The invention provides a part shape measuring device and a part shape measuring method, which are used for solving the defect that the measurement is not accurate and convenient in the prior art and realizing the purpose of quickly and accurately measuring the part shape under the condition of not contacting the part.
The invention provides a part shape measuring device, comprising:
a support frame and a processor;
the bearing platform is used for placing a part to be tested and is arranged on the support frame;
the first transmission mechanism is arranged on the support frame, and the output end of the first transmission mechanism is in power coupling connection with the bearing platform;
the output end of the first driving mechanism is in power coupling connection with the input end of the first transmission mechanism, and the first driving mechanism is used for driving the bearing platform to rotate around the rotating shaft of the bearing platform under the control of the processor;
the non-contact distance measuring device is used for measuring the distance between the part to be measured and the non-contact distance measuring device under the control of the processor; the processor is used for determining the shape of the part to be measured based on the measurement data of the non-contact range finder.
According to the invention, the device for measuring the shape of the part appearance further comprises:
the output end of the second transmission mechanism is in power coupling connection with the support frame;
and the output end of the second driving mechanism is in power coupling connection with the input end of the second transmission mechanism, and the second driving mechanism is used for driving the support frame to move along the vertical direction under the control of the processor.
According to the present invention, there is provided a component shape measuring apparatus, wherein the first transmission mechanism includes:
the first gear is fixedly connected with the output end of the first driving mechanism;
and the second gear is meshed with the first gear and is fixedly connected with the bearing platform.
According to the invention, the device for measuring the shape of the part appearance further comprises:
an installation table;
the limiting mechanism comprises at least two third gears, and the third gears are mounted on the mounting table;
meshing teeth are arranged on two sides of the supporting frame in the vertical direction, and at least two third gears on two sides of the supporting frame are respectively meshed with the meshing teeth on two sides of the supporting frame;
the second transmission mechanism comprises a fourth gear, the fourth gear is fixedly connected with the output end of the second driving mechanism, and the fourth gear is meshed with the meshing teeth.
According to the invention, the device for measuring the shape of the part appearance further comprises:
the non-contact range finder is fixedly arranged on the fixing mechanism, and a measuring end of the non-contact range finder faces the bearing platform.
According to the part shape measuring device provided by the invention, the non-contact range finder is a laser range finder, an infrared range finder or an ultrasonic range finder.
The invention also provides a part outline shape measuring method based on the part outline shape measuring device, which comprises the following steps:
the processor controls the non-contact distance measuring device to measure the distance between the non-contact distance measuring device and the end face position of one end of the part to be measured in the vertical direction;
the processor controls the first driving mechanism to drive the bearing platform to drive the part to be tested to rotate around the rotating shaft of the bearing platform for a circle;
the processor controls the second driving mechanism to drive the bearing platform to drive the part to be measured to move for a plurality of times along the vertical direction by a target distance until the non-contact range finder measures the distance between the non-contact range finder and the end face position of the other end of the part to be measured in the vertical direction;
after the part to be measured moves the target distance in the vertical direction each time, the processor controls the first driving mechanism to drive the bearing platform to drive the part to be measured to rotate around the rotating shaft of the bearing platform for a circle;
and the processor determines the shape of the part to be measured based on the target distance and the measurement data of the non-contact range finder when the part to be measured rotates around the rotating shaft of the bearing platform for one circle each time.
According to the method for measuring the shape of the part provided by the invention, under the condition that the measuring light or the measuring ultrasonic wave of the non-contact distance measuring device passes through the rotating shaft of the bearing platform, the step of determining the shape of the part to be measured comprises the following steps:
the processor determines the distance between the surface of the part to be measured and the rotating shaft of the bearing platform based on the distance between the non-contact distance measuring device and the rotating shaft of the bearing platform and the measurement data of the non-contact distance measuring device;
and the processor determines the shape of the part to be detected based on the distance between the surface of the part to be detected and the rotating shaft of the bearing platform and the target distance.
According to the method for measuring the external shape of the part provided by the invention, under the condition that the measuring light or the measuring ultrasonic wave of the non-contact distance measuring device does not pass through the rotating shaft of the bearing platform, the determining the external shape of the part to be measured comprises the following steps:
the processor determines the distance between the surface of the part to be measured and the rotating shaft of the bearing platform based on the target included angle, the distance between the non-contact range finder and the rotating shaft of the bearing platform and the measurement data of the non-contact range finder; the target included angle is an included angle between the measuring direction of the non-contact range finder and a target connecting line, and the target connecting line is a connecting line between the measuring end of the non-contact range finder and a rotating shaft of the bearing platform;
and the processor determines the shape of the part to be detected based on the distance between the surface of the part to be detected and the rotating shaft of the bearing platform and the target distance.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the part shape measuring method.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a part shape measurement method as described in any of the above.
The invention also provides a computer program product comprising a computer program which, when executed by a processor, implements a method of measuring a shape of a part as described in any one of the above.
According to the part shape measuring device, the part shape measuring method and the electronic equipment, the rotatable bearing platform is arranged to drive the part to be measured to rotate, the circumferential position sizes of the part to be measured at a certain height position can be conveniently measured, after circumferential size data of different height positions are measured, the non-contact distance measuring device can obtain distance data between the non-contact distance measuring device and the surface of the part to be measured at different positions, the processor can automatically control the measuring process and obtain accurate shape data of the part to be measured according to the measured data, the shape data of the part to be measured can be accurately and conveniently obtained, the detection difficulty is reduced, and the accuracy of the detected data is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a device for measuring the shape of a part profile provided by the present invention;
FIG. 2 is a schematic diagram of a communication connection structure of a processor provided by the present invention;
FIG. 3 is a schematic flow chart of a method for measuring the shape of a part according to the present invention;
FIG. 4 is a schematic diagram of a non-contact range finder measurement scenario provided by the present invention;
FIG. 5 is a second schematic view of a non-contact range finder measurement scenario provided by the present invention;
FIG. 6 is a third schematic view of a non-contact range finder measurement scenario provided by the present invention;
FIG. 7 is a fourth schematic view of a non-contact range finder measurement scenario provided by the present invention;
fig. 8 is a schematic structural diagram of an electronic device provided in the present invention.
Reference numerals:
110: a support frame; 111: a mounting frame; 112: a mounting table; 113: meshing teeth; 114: a third gear; 120: a load-bearing platform; 121: a part to be tested; 130: a first transmission mechanism; 131: a first gear; 132: a second gear; 140: a first drive mechanism; 150: a second transmission mechanism; 160: a second drive mechanism; 170: a non-contact range finder; 180: a processor; 190: and a fixing mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
The device, method and electronic equipment for measuring the shape of a part profile according to the present invention will be described with reference to fig. 1 to 8.
As shown in fig. 1 and fig. 2, the device for measuring the shape of a part according to the embodiment of the present invention mainly includes a supporting frame 110, a carrying platform 120, a first transmission mechanism 130, a first driving mechanism 140, a second transmission mechanism 150, a second driving mechanism 160, a non-contact distance meter 170, and a processor 180.
It should be noted that the supporting platform 120 is used for placing the part 121 to be tested. The supporting platform 120 may be made of metal or plastic, and the material of the supporting platform 120 is not limited herein.
In some embodiments, the surface of the supporting platform 120 may be specially treated to reduce damage to the surface of the part 121 to be measured and increase the friction between the supporting platform 120 and the part 121 to be measured, so as to prevent the part 121 to be measured from slipping during the rotation of the supporting platform 120. For example, a flexible coating may be provided on the load bearing surface of the load bearing platform 120.
The support bracket 110 may be a pole, a post, or a structure made up of a plurality of poles. The shape, structure and material of the supporting frame 110 are not limited herein.
It is understood that the support frame 110 is used to mount the load-bearing platform 120, and the load-bearing platform 120 is rotatably mounted to the support frame 110. For example, one end of the supporting frame 110 may be connected to the supporting platform 120 through a bearing, and the bearing fixes the supporting platform 120 relative to the supporting frame 110. The bearings may be installed at a rotation axis of the bearing platform 120, so that the bearing platform 120 can rotate around the rotation axis.
It should be noted that the first transmission mechanism 130 is mounted on the supporting frame 110, and an output end of the first transmission mechanism 130 is in power coupling connection with the bearing platform 120.
The output end of the first driving mechanism 140 is coupled to the input end of the first transmission mechanism 130, and the first driving mechanism 140 is configured to drive the supporting platform 120 to rotate around the rotation axis of the supporting platform 120 under the control of the processor 180.
It can be understood that, in a case that the circumferential dimension of the part 121 to be measured needs to be measured, the processor 180 may control the first driving mechanism 140 to move, the first driving mechanism 140 drives the first transmission mechanism 130 to move, and the first transmission mechanism 130 drives the bearing platform 120 to rotate around the rotation axis.
In this case, due to the friction force between the supporting platform 120 and the supporting surface, the part 121 to be measured placed on the supporting platform 120 rotates together with the supporting platform 120, so that the non-contact range finder 170 at the fixed position can measure the part 121 to be measured conveniently.
In some embodiments, the first drive mechanism 140 is a first motor, which is communicatively coupled to the processor 180.
It is understood that the processor 180 may be connected to the first motor via a communication cable, or the processor 180 may be communicatively connected to the first motor via wireless communication.
After receiving the instruction sent by the processor 180, the first motor may move according to a certain working mode and drive the first transmission mechanism 130 to move.
In some embodiments, the first transmission mechanism 130 includes a first gear 131 and a second gear 132.
The first gear 131 is fixedly connected to the output end of the first driving mechanism 140, the second gear 132 is engaged with the first gear 131, and the second gear 132 is fixedly connected to the supporting platform 120.
In some embodiments, the output of the first motor may be fixedly mounted within the central mounting hole of the first gear 131. The bearing between the load-bearing platform 120 and the support bracket 110 may be mounted in the central mounting hole of the second bearing.
In the case where the first gear 131 is installed perpendicularly to the installation plane of the second gear 132, the first gear 131 and the second gear 132 may both be bevel gears that mesh with each other.
In the case where the mounting plane of the first gear 131 and the mounting plane of the second gear 132 are parallel or coincide with each other, the first gear 131 and the second gear 132 may both be spur gears that mesh with each other.
In this embodiment, by adopting a gear transmission mode, the bearing platform 120 can be driven to rotate, the gear structure is more stable, the rotational stability of the bearing platform 120 can be ensured, and the possibility of position change of the part 121 to be detected is further reduced, so that the accuracy and convenience of detection are improved.
Of course, in other embodiments, other forms of the first transmission mechanism 130 may be used. For example, a belt transmission mechanism or the like may be used, and the specific form of the first transmission mechanism 130 is not limited herein.
It is understood that the supporting frame 110 may be fixedly mounted with a mounting bracket 111, the mounting bracket 111 is used for mounting and carrying the first driving mechanism 140 and the first transmission mechanism 130, and the mounting bracket 111 may be made of a metal or plastic material with good rigidity.
It should be noted that the output end of the second transmission mechanism 150 is connected to the support frame 110 in a power coupling manner.
The output end of the second driving mechanism 160 is in power coupling connection with the input end of the second transmission mechanism 150, and the second driving mechanism 160 is used for driving the supporting frame 110 to move in the vertical direction under the control of the processor 180.
It can be understood that, in the case that the axial measurement position of the part 121 to be measured needs to be adjusted, the processor 180 may control the second driving mechanism 160 to move, the second driving mechanism 160 drives the second transmission mechanism 150 to move, and the second transmission mechanism 150 drives the supporting frame 110 to move along the vertical direction.
In some embodiments, the device for measuring the shape of the part profile of the embodiment of the present invention further includes a mounting table 112 and a limiting mechanism. The mounting table 112 is used for mounting a limiting mechanism and a second transmission mechanism 150, and the limiting mechanism is used for limiting the support frame 110, so that the support frame 110 can keep stable when moving in the vertical direction.
The limiting mechanism comprises at least two third gears 114, the third gears 114 are mounted on the mounting table 112, and meshing teeth 113 are arranged on two sides of the supporting frame 110 in the vertical direction.
It should be noted that, at least one third gear 114 is rotatably installed on both sides of the supporting frame 110, and the third gear 114 is engaged with the engaging teeth 113 on the supporting frame 110.
At least two third gears 114 on the two sides of the support frame 110 are respectively meshed with the meshing teeth 113 on the two sides of the support frame 110, the third gears 114 on the two sides of the support frame 110 can limit the support frame 110 in rotation when the support frame 110 moves along the vertical direction, the support frame 110 is prevented from inclining, shaking and the like, the stability of the support frame 110 is ensured, and then the part 121 to be tested placed on the bearing platform 120 can be kept stable.
Of course, in other embodiments, the limiting mechanism may also be a circular tube limiting mechanism, and the specific form of the limiting mechanism is not limited herein.
The second transmission mechanism 150 includes a fourth gear, which is fixedly connected to the output end of the second driving mechanism 160 and is engaged with the engaging teeth 113.
It is understood that the second drive mechanism 160 may be a second motor. The rotating end of the second motor may be fixed to a mounting hole in the center of the fourth gear.
It can be understood that, in the case of not receiving the operation instruction of the processor 180, the output shaft of the second motor and the fourth gear are both kept in the locked state, and the support frame 110 is in a fixed stationary state.
After receiving the working instruction of the processor 180, the second motor works according to a certain working mode, the second motor drives the fourth gear to rotate, and the fourth gear drives the supporting frame 110 engaged with the fourth gear to move in the vertical direction through the engaging teeth 113.
The non-contact rangefinder 170 is used to measure the distance to the part 121 under test under the control of the processor 180.
It is understood that the non-contact distance meter 170 can emit a measuring light or measure an ultrasonic wave to the surface of the part 121 to be measured, and the non-contact distance meter 170 can measure the distance between the non-contact distance meter 170 and the position of the part 121 to be measured, where the light is received by the surface.
In some embodiments, non-contact rangefinder 170 is a laser rangefinder, an infrared rangefinder, or an ultrasonic rangefinder. Under different use scenes, the non-contact distance measuring device 170 of a proper type can be selected according to different use requirements, and the surface of the part cannot be damaged by a non-contact measuring mode.
It is understood that after the distance between the non-contact distance measuring device 170 and the position of the light received by the surface of the part 121 to be measured is obtained, a suitable reference axis, such as the rotation axis of the supporting platform 120, may be selected, and the distances from the reference axis to various positions on the surface of the part 121 to be measured are calculated, so as to establish a model of the part 121 to be measured.
In other words, the processor 180 can be used to determine the shape of the part 121 based on the measurement data of the non-contact range finder 170.
In some embodiments, the device for measuring the shape of the part according to the embodiments of the present invention further includes a fixing mechanism 190, the non-contact distance meter 170 is fixedly mounted on the fixing mechanism 190, and the measuring end of the non-contact distance meter 170 faces the supporting platform 120.
It will be appreciated that the fixing mechanism 190 may be a fixing bracket such as a tripod for fixing the non-contact rangefinder 170, thereby maintaining stability during the measurement process to improve the accuracy of the measurement data.
Of course, in other embodiments, the load-bearing platform 120 may be fixed in the vertical direction and the non-contact rangefinder 170 may be fixedly mounted to the fixing mechanism 190.
In this case, the driving mechanism and the transmission mechanism may be set as required to adjust the position of the fixing mechanism 190 in the vertical direction, so that the non-contact range finder 170 can measure data of different positions of the part 121 to be measured in the vertical direction.
It can be understood that before the measurement, the step size H of the supporting frame 110 in the vertical direction, the rotation speeds of the first motor and the second motor, the sampling frequency f of the non-contact distance meter 170, the measurement height H of the part 121 to be measured, and the placing position on the supporting platform 120 may be manually set.
The processor 180 may calculate the stepping time interval T of the supporting frame 110, the time T0 of the part 121 to be measured, the rotation time of the supporting platform 120, and the total measurement time T according to the above data.
After the part 121 to be tested is placed at the set position of the bearing platform 120, the power supply of the whole device is switched on, and the device is started to work.
As shown in fig. 2, in the present embodiment, the non-contact range finder 170, the first driving mechanism 140 and the second driving mechanism 160 are all in communication connection with the processor 180.
It will be appreciated that the load-bearing platform 120 and the support stand 110 alternate in rotational and vertical movements, respectively. When the supporting platform 120 rotates together with the part 121 to be measured, the non-contact range finder 170 measures the distance between each circumferential point of the outline of the part 121 to be measured.
After the whole part is measured, the processor 180 may generate data such as the outline, the sectional area, and the volume of the part 121 to be measured according to the measurement data. In addition, if the part 121 to be measured is a uniform part, data such as the total mass of the part and the mass distribution of each part can be obtained by inputting the density of the part 121 to be measured.
In the prior art, the outer diameter of the silicon rod produced by deposition in a reducing furnace is not completely equal in the process of producing the polycrystalline silicon rod by adopting a Siemens reducing method. However, in the subsequent process of extracting the silicon core from the silicon rod, the silicon core control system usually only measures the external diameter value of a certain section of the silicon core, and defaults the external diameter value to be a uniform cylinder for heating, core pulling and other operations. In this case, due to the difference in outer diameter, an operator is required to control the heating rate and the core pulling rate from time to time, so as to prevent the uneven heating of the silicon rod and the uneven outer diameter of the silicon core, which would lead to more complicated subsequent work due to inaccurate measurement.
In the embodiment, the external dimension data of the polysilicon rod can be accurately and conveniently measured by using the part external shape measuring device provided by the embodiment of the invention, and then, each part is precisely and subsequently processed.
According to the part shape measuring device provided by the embodiment of the invention, the rotatable bearing platform 120 is arranged to drive the part to be measured 121 to rotate, so that the circumferential sizes of the part to be measured at a certain height position can be conveniently measured, after the circumferential size data at different height positions are measured, the non-contact distance measuring device 170 can obtain the distance data between the surface of the part to be measured 121 and the surface of the part to be measured at different positions, the processor 180 can automatically control the measuring process and obtain the accurate shape data of the part to be measured 121 according to the measured data, so that the shape size of the part can be accurately and conveniently obtained, the detection difficulty is reduced, and the accuracy of the detected data is improved.
The following describes a method for measuring the external shape of a part provided by the present invention, and the method for measuring the external shape of a part described below is implemented based on the device for measuring the external shape of a part described above.
As shown in fig. 3, the method for measuring the shape of the part according to the embodiment of the present invention mainly includes steps 310, 320, 330, 340 and 350.
In step 310, the processor controls the non-contact distance measuring device to measure the end face position of the part to be measured at one end in the vertical direction.
It can be understood that before the measurement, the step size H of the support frame in the vertical direction, the rotation speeds of the first motor and the second motor, the sampling frequency f of the non-contact distance meter, the measurement height H of the part to be measured, the placing position on the bearing platform, and the like can be manually set.
The processor can calculate the stepping time interval T of the support frame, the time T of the part to be measured and the rotation of the bearing platform for one circle according to the data 0 And measuring the total time T.
E.g. T 0 =360°/ω，∆T=T 0 Δ T, T = (H /) T; wherein, ω is the rotation speed of the load-bearing platform, and the error-proofing margin set by the position-t system.
After the part to be measured is placed at the set position of the bearing platform, the power supply of the whole device is switched on, and the device is started to work.
In this case, the processor controls the non-contact distance measuring device to emit the measuring light or the measuring ultrasonic wave to the end face position of one end of the part to be measured in the vertical direction.
It is understood that the measurement may be started from the top end face of the part to be measured, or the measurement may be started from the bottom end face of the part to be measured.
And 320, controlling the first driving mechanism to drive the bearing platform to drive the part to be tested to rotate around the rotating shaft of the bearing platform for a circle by the processor.
It will be appreciated that the speed of rotation may be set in advance.
And 330, controlling the second driving mechanism to drive the bearing platform to drive the part to be measured to move the target distance for multiple times along the vertical direction by the processor until the non-contact range finder measures the distance between the part to be measured and the end face position of the other end of the part to be measured in the vertical direction.
The target distance is the stepping size h of the support frame in the vertical direction each time, and the second driving mechanism drives the bearing platform to drive the part to be measured to move in the vertical direction each time by the step size h. The product of the stepping size Δ h and the stepping times is the total height of the part to be measured.
It can be understood that the smaller the sampling frequency and the step size h of the non-contact distance meter are, the more the collected data of the part to be measured is, the more accurate the finally obtained overall size is.
It can be understood that, in the case of starting measurement from the end face of the top end of the part to be measured, the stepping direction of the support frame in the vertical direction each time is vertically downward. Under the condition that measurement is started from the end face of one end of the bottom of the part to be measured, the stepping direction of the support frame in the vertical direction is vertical upwards every time.
And 340, after the part to be measured moves the target distance in the vertical direction each time, the processor controls the first driving mechanism to drive the bearing platform to drive the part to be measured to rotate around the rotating shaft of the bearing platform for a circle.
It will be appreciated that the load-bearing platform and the support frame alternate in rotational and vertical movements, respectively.
The first motor drives the bearing platform to automatically stop every time the bearing platform rotates for one circle, and signals of one circle of rotation are sent to the processor. The processor sends a control command to the second motor after receiving a signal that the part to be measured rotates for a circle, and the second motor works and drives the support frame to step up or down for a target distance h.
When the bearing platform rotates together with the part to be measured, the non-contact range finder measures the distance of each circumferential point of the outline of the part to be measured.
And 350, determining the shape of the part to be measured by the processor based on the target distance and the measurement data of the non-contact distance measuring device when the part to be measured rotates around the rotating shaft of the bearing platform for one circle each time.
After the whole part is measured, the processor can generate data such as the outline, the sectional area, the volume and the like of the part to be measured according to the measurement data. In addition, if the part to be measured is a uniform part, the data such as the total mass of the part, the mass distribution of each part and the like can be obtained by inputting the density of the part to be measured.
According to the part shape measuring method provided by the embodiment of the invention, the rotatable bearing platform is arranged to drive the part to be measured to rotate, the support frame capable of moving along the vertical direction is arranged to drive the part to be measured to move along the vertical direction, so that the non-contact distance measuring device can obtain distance data of the surface of the part to be measured, the processor can automatically control the measuring process and obtain accurate shape data of the part to be measured according to the measured data, further accurately and conveniently obtain the shape and size of the part, the detection difficulty is reduced, and the accuracy of the detected data is improved.
In some embodiments, determining the shape of the part to be measured in the case that the measuring light or the measuring ultrasonic wave of the non-contact distance meter passes through the rotating shaft of the bearing platform includes: the processor determines the distance between the surface of the part to be measured and the rotating shaft of the bearing platform based on the distance between the non-contact distance measuring device and the rotating shaft of the bearing platform and the measurement data of the non-contact distance measuring device.
As shown in fig. 4, a black point in the part 121 to be measured in the drawing is a rotation axis of the bearing platform. The distance x between the non-contact distance meter 170 and the rotation axis of the load-bearing platform can be determined from the position of the rotation axis of the load-bearing platform 0 The measurement data of the noncontact distance meter 170 is x 1 And the distance y = x between the surface of the part 121 to be measured and the rotating shaft of the bearing platform 0 -x 1 。
And the processor determines the shape of the part to be detected based on the distance between the surface of the part to be detected and the rotating shaft of the bearing platform and the target distance.
It can be understood that the non-contact range finder measures data y of a plurality of positions on the surface of the part to be measured at a certain sampling frequency.
As shown in FIG. 5, a plurality of data y can be measured at the same height position of the part 121 to be measured 1 、y 2 、y 3 And y 4 And so on.
As shown in FIG. 6, the dotted lines in the graph are used to indicate different measurement positions in the vertical direction of the part 121 to be measured, and the distance between two adjacent dotted lines is the target distance Δ h.
After the measurement of each height position is completed, the processor can obtain the appearance profile and the size data of the part to be measured according to the heights of different positions and the distance between the processor and the rotating shaft of the bearing platform, the rotating shaft of the bearing platform is used as a reference, and according to a calculus principle.
In some embodiments, determining the shape of the part to be measured without passing the measuring light or the measuring ultrasonic wave of the non-contact distance meter through the rotating shaft of the bearing platform comprises: the processor determines the distance between the surface of the part to be measured and the rotating shaft of the bearing platform based on the target included angle, the distance between the non-contact distance measuring device and the rotating shaft of the bearing platform and the measurement data of the non-contact distance measuring device.
As shown in fig. 7, the target included angle α is an included angle between a measuring direction of the non-contact range finder 170 and a target connecting line, and the target connecting line is a connecting line between a measuring end of the non-contact range finder 170 and a rotating shaft of the supporting platform. It should be noted that the size of the target included angle can be obtained by measuring in advance according to the rotation axis of the bearing platform on which the to-be-measured part 121 is placed and the installation position of the non-contact range finder 170.
It will be appreciated that the distance x between the non-contact distance meter and the axis of rotation of the load-bearing platform can be determined from the position of the axis of rotation of the load-bearing platform 0 The measured data of the non-contact range finder is x 1 According to the cosine theorem, the distance y between the surface of the part to be measured and the rotating shaft of the bearing platform can be expressed as follows:
wherein alpha is the target included angle.
And the processor determines the shape of the part to be detected based on the distance between the surface of the part to be detected and the rotating shaft of the bearing platform and the target distance.
It can be understood that the non-contact distance meter measures data y of multiple positions on the surface of the part to be measured at a certain sampling frequency, and the shape profile and the size data of the part to be measured can be obtained according to the heights of different positions and the distance between the non-contact distance meter and the rotating shaft of the bearing platform, and by taking the rotating shaft of the bearing platform as a reference and according to the principle of calculus.
In some embodiments, after the processor controls the first driving mechanism to drive the carrying platform to drive the part to be measured to rotate around the rotation axis of the carrying platform for one circle each time, the processor may compare data measured for the first time and the last time.
After the part to be measured rotates for one circle, the measuring position of the part to be measured by the non-contact distance measuring device cannot be changed.
In this case, if the measurement data on both sides of the part to be measured are different, it can be determined that the position of the part to be measured has changed.
In consideration of the rotation precision of the bearing platform, a first preset value can be set for avoiding the influence of measurement errors between two measurement data. The first preset value can be determined according to the rotation precision of the bearing platform and the machining precision of the part to be measured.
And if the absolute value of the difference value between the data measured for the first time and the data measured for the last time is greater than a first preset value, determining that the position of the part to be measured is changed. In this case, the processor may control the operation of the measuring device and send a prompt to the user.
In the embodiment, the influence on the part measurement caused by the change of the position of the part to be measured under the unexpected condition can be fully considered, and the measurement accuracy is further improved.
Fig. 8 illustrates a physical structure diagram of an electronic device, and as shown in fig. 8, the electronic device may include: a processor (processor) 810, a communication Interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the communication bus 840. Processor 810 may invoke logic instructions in memory 830 to perform a part form measurement method comprising: the processor controls the non-contact distance measuring device to measure the distance between the non-contact distance measuring device and the end face position of one end of the part to be measured in the vertical direction; the processor controls the first driving mechanism to drive the bearing platform to drive the part to be tested to rotate for a circle around a rotating shaft of the bearing platform; the processor controls the second driving mechanism to drive the bearing platform to drive the part to be measured to move for a plurality of times along the vertical direction for a target distance until the non-contact distance meter measures the distance between the non-contact distance meter and the end face position of the other end of the part to be measured in the vertical direction; after the part to be measured moves the target distance along the vertical direction each time, the processor controls the first driving mechanism to drive the bearing platform to drive the part to be measured to rotate around the rotating shaft of the bearing platform for a circle; the processor determines the shape of the part to be measured based on the target distance and the measurement data of the non-contact distance measuring device when the part to be measured rotates around the rotating shaft of the bearing platform for one circle each time.
In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program, the computer program being stored on a non-transitory computer-readable storage medium, the computer program, when executed by a processor, being capable of executing the method for measuring a shape of a part outline provided by the above methods, the method comprising: the processor controls the non-contact distance measuring device to measure the distance between the non-contact distance measuring device and the end face position of one end of the part to be measured in the vertical direction; the processor controls the first driving mechanism to drive the bearing platform to drive the part to be tested to rotate for a circle around a rotating shaft of the bearing platform; the processor controls the second driving mechanism to drive the bearing platform to drive the part to be measured to move for a plurality of times along the vertical direction for a target distance until the non-contact distance meter measures the distance between the non-contact distance meter and the end face position of the other end of the part to be measured in the vertical direction; after the part to be measured moves the target distance along the vertical direction each time, the processor controls the first driving mechanism to drive the bearing platform to drive the part to be measured to rotate around the rotating shaft of the bearing platform for a circle; the processor determines the shape of the part to be measured based on the target distance and the measurement data of the non-contact distance measuring device when the part to be measured rotates around the rotating shaft of the bearing platform for one circle each time.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements a method for measuring a shape of a part provided by the above methods, the method comprising: the processor controls the non-contact distance measuring device to measure the distance between the non-contact distance measuring device and the end face position of one end of the part to be measured in the vertical direction; the processor controls the first driving mechanism to drive the bearing platform to drive the part to be tested to rotate for a circle around a rotating shaft of the bearing platform; the processor controls the second driving mechanism to drive the bearing platform to drive the part to be measured to move for a plurality of times along the vertical direction for a target distance until the non-contact distance meter measures the distance between the non-contact distance meter and the end face position of the other end of the part to be measured in the vertical direction; after the part to be measured moves the target distance along the vertical direction each time, the processor controls the first driving mechanism to drive the bearing platform to drive the part to be measured to rotate around the rotating shaft of the bearing platform for a circle; the processor determines the shape of the part to be measured based on the target distance and the measurement data of the non-contact distance measuring device when the part to be measured rotates around the rotating shaft of the bearing platform for one circle each time.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A part shape measuring apparatus, comprising:
a support frame and a processor;
the bearing platform is used for placing a part to be tested and is arranged on the support frame;
the first transmission mechanism is arranged on the support frame, and the output end of the first transmission mechanism is in power coupling connection with the bearing platform;
the output end of the first driving mechanism is in power coupling connection with the input end of the first transmission mechanism, and the first driving mechanism is used for driving the bearing platform to rotate around the rotating shaft of the bearing platform under the control of the processor;
the non-contact distance measuring device is used for measuring the distance between the part to be measured and the non-contact distance measuring device under the control of the processor; the processor is used for determining the shape of the part to be measured based on the measurement data of the non-contact range finder;
the output end of the second transmission mechanism is in power coupling connection with the support frame;
the output end of the second driving mechanism is in power coupling connection with the input end of the second transmission mechanism, and the second driving mechanism is used for driving the support frame to move along the vertical direction under the control of the processor;
an installation table;
the limiting mechanism comprises at least two third gears, and the third gears are mounted on the mounting table;
meshing teeth are arranged on two sides of the supporting frame in the vertical direction, and at least two third gears on two sides of the supporting frame are respectively meshed with the meshing teeth on two sides of the supporting frame;
the second transmission mechanism comprises a fourth gear, the fourth gear is fixedly connected with the output end of the second driving mechanism, and the fourth gear is meshed with the meshing teeth;
the first transmission mechanism includes:
the first gear is fixedly connected with the output end of the first driving mechanism;
and the second gear is meshed with the first gear and is fixedly connected with the bearing platform.
2. The component shape measuring apparatus according to claim 1, further comprising:
the non-contact range finder is fixedly arranged on the fixing mechanism, and a measuring end of the non-contact range finder faces the bearing platform.
3. The device for measuring the shape of an external shape of a part according to claim 1, wherein the non-contact distance measuring device is a laser distance measuring device, an infrared distance measuring device, or an ultrasonic distance measuring device.
4. A part shape measuring method based on the part shape measuring apparatus according to any one of claims 1 to 3, characterized by comprising:
the processor controls the non-contact distance measuring device to measure the distance between the non-contact distance measuring device and the end face position of one end of the part to be measured in the vertical direction;
the processor controls the first driving mechanism to drive the bearing platform to drive the part to be tested to rotate around the rotating shaft of the bearing platform for a circle;
the processor controls the second driving mechanism to drive the bearing platform to drive the part to be measured to move for a plurality of times along the vertical direction by a target distance until the non-contact range finder measures the distance between the non-contact range finder and the end face position of the other end of the part to be measured in the vertical direction;
after the part to be measured moves the target distance in the vertical direction each time, the processor controls the first driving mechanism to drive the bearing platform to drive the part to be measured to rotate around the rotating shaft of the bearing platform for a circle;
the processor determines the shape of the part to be measured based on the target distance and the measurement data of the non-contact distance measuring device when the part to be measured rotates around the rotating shaft of the bearing platform for one circle each time;
under the condition that the measuring light or the measuring ultrasonic wave of the non-contact range finder does not pass through the rotating shaft of the bearing platform, the determining the shape of the part to be measured comprises the following steps:
the processor determines the distance between the surface of the part to be measured and the rotating shaft of the bearing platform based on the target included angle, the distance between the non-contact range finder and the rotating shaft of the bearing platform and the measurement data of the non-contact range finder; the target included angle is an included angle between the measuring direction of the non-contact range finder and a target connecting line, and the target connecting line is a connecting line between the measuring end of the non-contact range finder and a rotating shaft of the bearing platform;
and the processor determines the shape of the part to be detected based on the distance between the surface of the part to be detected and the rotating shaft of the bearing platform and the target distance.
5. The method as claimed in claim 4, wherein the determining the shape of the part to be measured in the case where the measuring light or the measuring ultrasonic wave of the non-contact distance measuring device passes through the rotation axis of the carrying platform comprises:
the processor determines the distance between the surface of the part to be measured and the rotating shaft of the bearing platform based on the distance between the non-contact distance measuring device and the rotating shaft of the bearing platform and the measurement data of the non-contact distance measuring device;
and the processor determines the shape of the part to be detected based on the distance between the surface of the part to be detected and the rotating shaft of the bearing platform and the target distance.
6. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the part form measurement method of any of claims 4 or 5 when executing the program.
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| CN202211299915.8A CN115371590B (en) | 2022-10-24 | 2022-10-24 | Device and method for measuring outline shape of part and electronic equipment |
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| CN202211299915.8A CN115371590B (en) | 2022-10-24 | 2022-10-24 | Device and method for measuring outline shape of part and electronic equipment |
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| KR101477185B1 (en) * | 2013-03-21 | 2014-12-29 | 부산대학교 산학협력단 | 3-Dimension Scanner Platform and Scanning Device Having the Same |
| CN104315979B (en) * | 2014-11-19 | 2017-01-25 | 重庆理工大学 | Three-dimensional scanner and three-dimensional scanning method |
| CN104535035B (en) * | 2014-12-12 | 2017-05-03 | 长沙中联消防机械有限公司 | External dimension detection device and external dimension detection system for part |
| CN206056522U (en) * | 2016-09-13 | 2017-03-29 | 安徽省长江计量所 | A kind of contactless cylinder part inside/outside diameter size and form and position error measurement device |
| CN207518685U (en) * | 2017-11-09 | 2018-06-19 | 广州市科迅实验器材有限公司 | A kind of comprehensive 3D scanners |
| CN208075793U (en) * | 2018-04-28 | 2018-11-09 | 青岛瑞康宏业智能科技有限公司 | A kind of bidirectional modulation spatial digitizer |
| CN111412841A (en) * | 2020-05-27 | 2020-07-14 | 潍坊科技学院 | Detect mechatronic device of machine part size |
| CN113203017A (en) * | 2021-05-20 | 2021-08-03 | 辽宁省交通高等专科学校 | Multi-axis rotating device for three-dimensional scanning |
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