CN116336949A - Measurement method, device, equipment and medium based on laser displacement - Google Patents
Measurement method, device, equipment and medium based on laser displacement Download PDFInfo
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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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
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Abstract
The application discloses a measuring method, a device, equipment and a medium based on laser displacement, wherein the measuring method based on laser displacement comprises the following steps: reading standard section specifications of different cable joints, and determining measuring position points based on section shapes and characteristic lines; when the longest standard diameter is smaller than or equal to a default length supporting range of the cable connector bearing mechanism, sending a thickness detection instruction to the laser displacement supporting mechanism, wherein the thickness detection instruction comprises a measuring position point; and controlling the laser displacement sensing module to detect according to the measured position point, obtaining the thickness of the position point, and confirming the thickness detection compliance result of the cable joint to be measured according to the thickness of the position point. The method can flexibly adjust the position of the laser displacement sensing module according to the cross section shapes of different cable joints, and can perform non-contact width detection, thereby effectively improving the efficiency and high accuracy of testing the width of various cable joints.
Description
Technical Field
The present invention relates to the field of precision measurement technologies, and in particular, to a measurement method, apparatus, device, and medium based on laser displacement.
Background
The cable joint is also called a cable head. After the cable is laid, the sections must be connected as a unit in order to form a continuous line, and these points of connection are called cable joints. The cable joints in the middle of the cable line are called intermediate joints, while the cable joints at both ends of the line are called terminal heads. The cable connector is used for locking and fixing the incoming and outgoing lines, and plays a role in preventing water, dust and vibration. The cable joint has high requirements on the outer diameter, the inner diameter and the wall thickness, otherwise, the locking wire inlet and outlet or the functions of dust prevention, water prevention and the like are difficult to realize.
For cable manufacturers, the thickness of the material of the cable connector formed by the outer diameter and the inner diameter of the line is different due to the different diameters of wires or different appearance designs. Measuring the thickness of different cable joints and the like requires manually setting the measurement position of the peripheral measurement system according to different measurement scenes. At present, the measuring of most workpieces in the industrial field uses contact tools such as vernier calipers and steel rules, and the like, and the measuring of the thickness of the cable joint is also the same, so that the measuring precision is low, the error is large, the contact tools are easy to damage the surfaces of the workpieces, and the measuring requirement is difficult to meet.
The non-contact three-dimensional measurement technology based on machine vision is attracting attention due to high precision and no damage, and the non-contact measurement mode based on machine vision is gradually applied to various industries. How to realize thickness measurement of different kinds of cable connectors by adopting a non-contact measurement mode is a problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a measuring method, a measuring device, measuring equipment and a measuring medium based on laser displacement, which are used for solving the problem of realizing thickness measurement of different types of cable joints by adopting a non-contact measuring mode.
A laser displacement-based measurement method, comprising:
obtaining standard section specifications of the cable joint to be tested, wherein the standard section specifications comprise a section shape and a characteristic line standard length, and the characteristic line standard length comprises the longest standard diameter;
determining a measurement location point based on the cross-sectional shape and the feature line;
if the longest standard diameter is smaller than or equal to the default length supporting range of the cable joint bearing mechanism, sending a thickness detection instruction to the laser displacement supporting mechanism, wherein the thickness detection instruction comprises a measuring position point;
and controlling the laser displacement sensing module to detect according to the measured position point, obtaining the thickness of the position point, and confirming the thickness detection compliance result of the cable joint to be measured according to the thickness of the position point.
A laser displacement-based measurement device, comprising:
the cable joint bearing mechanism is used for bearing and clamping the cable joint to be tested;
the laser displacement sensing module is used for emitting laser to the section of the cable joint to be tested so as to acquire the thickness of the cable joint;
the laser displacement supporting mechanism is used for supporting the laser displacement sensing module to realize six-way movement, so that the scanning range of the laser generator is controlled to cover the cable joint to be tested;
the controller is electrically connected with the laser displacement sensing module and the laser displacement supporting mechanism respectively and is used for receiving laser image signals sent by the laser displacement sensing module and controlling the laser displacement supporting mechanism to realize six-way movement, and the controller comprises the following modules:
the section specification acquisition module is used for acquiring standard section specifications of the cable joint to be tested, wherein the standard section specifications comprise a section shape and a characteristic line standard length, and the characteristic line standard length comprises the longest standard diameter;
a measurement position point determination module for determining a measurement position point based on the cross-sectional shape and the feature line;
the detection instruction sending module is used for sending a thickness detection instruction to the laser displacement supporting mechanism if the longest standard diameter is smaller than or equal to a default length supporting range of the cable joint bearing mechanism, wherein the thickness detection instruction comprises a measurement position point;
and the compliance result confirmation module is used for controlling the laser displacement sensing module to detect according to the measured position points, obtaining the thickness of the position points and confirming the thickness detection compliance result of the cable joint to be tested according to the thickness of the position points.
In some embodiments, the laser displacement-based measuring device is further configured to adjust the default length support of the cable joint carrier to the longest standard diameter if the longest standard diameter is greater than the default length support range of the cable joint carrier, and continue to perform the step of sending the thickness detection command to the laser displacement support.
In some embodiments, the measuring device based on laser displacement is further used for obtaining an actual cross-section image of the cable joint to be measured through the camera, obtaining an actual cross-section profile of the actual cross-section image, comparing the actual cross-section profile with a standard cross-section profile, and obtaining a comparison result; if the comparison result is that the profiles coincide, continuing to execute the step of acquiring the standard section specification of the cable joint to be tested; if the comparison result shows that the profiles are not coincident, outputting a prompt that the inner diameter or the outer diameter of the cable joint to be tested is not compliant.
In some embodiments, the laser displacement-based measurement device is further configured to extract an actual inner diameter and an actual outer diameter of the actual cross-sectional profile; comparing the actual inner diameter with the standard inner diameter, and comparing the actual outer diameter with the standard outer diameter; if the actual inner diameter is coincident with the standard inner diameter and the actual outer diameter is coincident with the standard outer diameter, outputting a comparison result to be contour coincidence; if the actual inner diameter is not completely overlapped with the standard inner diameter or the actual outer diameter is not completely overlapped with the standard outer diameter, outputting a comparison result that the contour is not overlapped.
In some embodiments, the measuring device based on laser displacement is further used for acquiring a space coordinate to be measured corresponding to the measurement position point in the measurement space; acquiring corresponding space positioning coordinates of the laser displacement sensing module in a measurement space based on the measuring range and the space coordinates to be measured of the laser displacement sensing module; and controlling the laser displacement supporting mechanism to move the laser displacement sensing module to the space positioning coordinates so that the laser displacement sensing module detects according to the measuring position points.
In some embodiments, the measuring device based on laser displacement is further configured to output a prompt that the thickness of the cable connector to be measured does not conform to the compliance requirement if the thickness of the location point is not equal to the standard thickness of the feature line; and if the thickness of the position point is equal to the standard thickness of the characteristic line, outputting a prompt that the thickness of the cable joint to be tested meets the compliance requirement.
An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the above-mentioned laser displacement based measurement method when executing the computer program.
A computer readable medium storing a computer program which, when executed by a processor, implements the laser displacement-based measurement method described above.
The measuring method, the measuring device, the measuring equipment and the measuring medium based on the laser displacement are characterized in that standard section specifications of different cable joints are read, and measuring position points are determined based on section shapes and characteristic lines; when the longest standard diameter is smaller than or equal to a default length supporting range of the cable connector bearing mechanism, sending a thickness detection instruction to the laser displacement supporting mechanism, wherein the thickness detection instruction comprises a measuring position point; and controlling the laser displacement sensing module to detect according to the measured position point, obtaining the thickness of the position point, and confirming the thickness detection compliance result of the cable joint to be measured according to the thickness of the position point. The method can flexibly adjust the position of the laser displacement sensing module according to the cross section shapes of different cable joints, and can perform non-contact width detection, thereby effectively improving the efficiency and high accuracy of testing the width of various cable joints.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an application environment of a laser displacement-based measurement method according to an embodiment of the invention;
FIG. 2 is a first flowchart of a laser displacement-based measurement method according to a first embodiment of the present invention;
FIG. 3 is a second flowchart of a laser displacement-based measuring method according to a second embodiment of the present invention;
FIG. 4 is a third flowchart of a laser displacement-based measuring method according to a third embodiment of the present invention;
FIG. 5 is a fourth flowchart of a laser displacement-based measuring method according to a fourth embodiment of the present invention;
FIG. 6 is a fifth flowchart of a laser displacement-based measuring method according to a fifth embodiment of the present invention;
FIG. 7 is a schematic diagram of a measuring device based on laser displacement according to an embodiment of the invention;
fig. 8 is a schematic diagram of an electronic device according to an embodiment of the invention.
Reference numerals illustrate:
10. a controller; 110. a section specification acquisition module; 120. a measurement location point determination module; 130, detecting an instruction sending module; 140. a compliance result confirmation module;
20. a laser displacement support mechanism; 30. a laser displacement sensing module; 40. the cable joint bearing mechanism.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The measuring method based on the laser displacement provided by the embodiment of the invention can be applied to a system formed by a measuring device based on the laser displacement as shown in fig. 1, wherein the measuring device based on the laser displacement comprises a controller 10, a laser displacement supporting mechanism 20, a laser displacement sensing module 30 and a cable joint bearing mechanism 40, and the laser displacement supporting mechanism 20, the laser displacement sensing module 30 and the cable joint bearing mechanism 40 interact data with the controller 10 through cables.
In one embodiment, as shown in fig. 2, a measurement method based on laser displacement is provided, and the method is applied to the controller 10 in fig. 1, and specifically includes the following steps:
s110, obtaining standard section specifications of the cable joint to be tested, wherein the standard section specifications comprise section shapes and standard lengths of characteristic lines, and the standard lengths of the characteristic lines comprise the longest standard diameter.
The standard section specification is the section size which each cable joint meets the factory requirement. For example, the specifications of the cable joint include a single-button type P3 and a double-button type P4, and the caliber of the metal hose is generally from 5mm to 100mm, etc.
Specifically, the cross-sectional shape of the cable joint is various, such as oval, circular, or rounded rectangle. The characteristic line includes: the oval cross section is the longest diameter and the shortest diameter passing through the center, and the circular cross section is any diameter passing through the center, etc. The feature line is the most representative line segment length for each cross-sectional shape.
S120, determining a measuring position point based on the sectional shape and the characteristic line.
Specifically, the measurement position points are the characteristic lines and the inner diameter and outer diameter intersections on each cross-sectional shape. And measuring the distance between the inner diameter intersection point and the outer diameter intersection point in a laser displacement mode to obtain the joint thickness of the cable joint at the characteristic line. For example, for a circular cross-sectional shape, the length L of the characteristic line includes a joint thickness L1 formed by the intersection of the inner diameter and the outer diameter of one end, a joint thickness L2 formed by the intersection of the inner diameter and the outer diameter of the other end, i.e., l=l1+r+l2.
S130, if the longest standard diameter is smaller than or equal to a default length supporting range of the cable connector bearing mechanism, sending a thickness detection instruction to the laser displacement supporting mechanism, wherein the thickness detection instruction comprises a measuring position point.
Specifically, the default length support range is the longest placement length of the cable connector placed therein that can be supported by at least two support portions included in the cable connector bearing mechanism, that is, the longest standard diameter of the cable connector. It will be appreciated that when the longest standard diameter of the cable connector is less than or equal to the default length support range of the cable connector load bearing mechanism, the cable connector load bearing mechanism may secure the cable connector therein, be less prone to wobble, etc., providing a reliable guarantee for subsequent width measurements.
S140, controlling the laser displacement sensing module to detect according to the measured position points, obtaining the thickness of the position points, and confirming the thickness detection compliance result of the cable joint to be tested according to the thickness of the position points.
Specifically, the laser displacement measurement mode can be used for detecting according to the measurement position points, and the thickness of the position points is obtained. The laser transmitter emits visible red laser to the cross-section surface of the cable joint to be tested through the lens, and the laser scattered by the cross-section surface passes through the receiver lens and is received by the CCD linear camera inside, and the CCD linear camera can see the light spot under different angles according to different distances. Based on this angle and the known distance between the laser and the camera, the controller can calculate the distance between the sensor and the object being measured.
The highest linearity of the laser displacement measurement mode adopting the triangulation method can reach 1um, the resolution can reach 0.1um of precision, high linearity and high response, and the method can be suitable for severe production environments. The included angle between the emitting direction of the laser emitting module towards the intersection point of the outer diameter characteristic line of the cable connector and the optical axis of the receiving module in the laser displacement measurement mode is known as a, the interval from the center of the emitting module to the center of the receiving module is x, the focal length of the lens of the receiving module is f, and the actual thickness L1 formed by the intersection point of the inner diameter of the characteristic line and the intersection point of the outer diameter of the characteristic line can be obtained according to the offset L of the light spot on the CMOS detector relative to the intersection point of the inner diameter of the characteristic line and the intersection point of the outer diameter of the characteristic line.
According to the measuring method based on the laser displacement, standard section specifications of different cable joints are read, and measuring position points are determined based on section shapes and characteristic lines; when the longest standard diameter is smaller than or equal to a default length supporting range of the cable connector bearing mechanism, sending a thickness detection instruction to the laser displacement supporting mechanism, wherein the thickness detection instruction comprises a measuring position point; and controlling the laser displacement sensing module to detect according to the measured position point, obtaining the thickness of the position point, and confirming the thickness detection compliance result of the cable joint to be measured according to the thickness of the position point. The method can flexibly adjust the position of the laser displacement sensing module according to the cross section shapes of different cable joints, and can perform non-contact width detection, thereby effectively improving the efficiency and high accuracy of testing the width of various cable joints.
In one embodiment, as shown in fig. 3, before step S130, that is, before if the longest standard diameter is less than or equal to the default length support range of the cable connector carrying mechanism, the method further specifically includes the following steps:
s1301, if the longest standard diameter is larger than the default length supporting range of the cable joint bearing mechanism, adjusting the default length supporting range of the cable joint bearing mechanism to be the longest standard diameter, and continuously executing the step of sending a thickness detection instruction to the laser displacement supporting mechanism.
Specifically, the embodiment can make relative movement through the two opposite supporting parts included in the cable connector bearing mechanism, so as to realize the adjustment of the default length of the cable connector bearing mechanism to the longest standard diameter. The two supporting parts can relatively move through the conveying mechanism below each supporting part, for example, the rotation of the conveying belt drives the plurality of supporting parts to approach or separate from each other, so that the position adjustment of the cable connector is reduced, and the fixing of the cable connector is realized through the adaptive movement of the cable connector bearing mechanism.
In a specific embodiment, the standard cross-sectional specification includes a standard cross-sectional profile. As shown in fig. 4, before step S110, that is, before the standard cross-section specification of the cable joint to be tested is obtained, the method specifically includes the following steps:
s1101, acquiring an actual cross-section image of the cable joint to be tested through a camera, acquiring an actual cross-section profile of the actual cross-section image, comparing the actual cross-section profile with a standard cross-section profile, and acquiring a comparison result.
S1102, if the comparison result is that the outlines coincide, continuing to execute the step of obtaining the standard section specification of the cable joint to be tested.
S1103, if the comparison result shows that the outlines are not coincident, outputting a prompt that the inner diameter or the outer diameter of the cable joint to be tested is not compliant.
Specifically, in step S1101, that is, comparing the actual cross-sectional profile with the standard cross-sectional profile, a comparison result is obtained, which specifically includes the following steps:
s101, extracting the actual inner diameter and the actual outer diameter of the actual cross-sectional profile.
S102, comparing the actual inner diameter with the standard inner diameter, and comparing the actual outer diameter with the standard outer diameter.
S103, if the actual inner diameter is coincident with the standard inner diameter and the actual outer diameter is coincident with the standard outer diameter, outputting a comparison result to be contour coincidence.
S104, if the actual inner diameter is not completely overlapped with the standard inner diameter or the actual outer diameter is not completely overlapped with the standard outer diameter, outputting a comparison result that the contour is not overlapped.
Specifically, the binary image contour extraction only needs to scoop out the internal pixel points of the actual section image. All the 8 adjacent pixel points of the bright point are bright points, and the bright point is an internal point, and otherwise the bright point is a contour point. And (5) setting all the internal points as background points to finish the extraction of the actual section profile.
It can be appreciated that, due to the limited imaging performance of the camera, the measurement accuracy is far smaller than that of the laser displacement measurement mode, for example, the resolution of measuring the long stripe shape for a 200-ten thousand pixel (1200 pixel) camera is: resolution=30 mm/1600 pixel=0.019 mm/Pixel, and the highest linearity of the laser displacement measurement mode adopting the triangulation method can reach 1um, and the resolution can reach 0.1um precision.
Therefore, the inner diameter and the outer diameter of the actual section profile are compared with the standard inner diameter and the standard outer diameter, so that whether the cable joint has edge defects, such as unfilled corners, pits or bulges, is primarily judged. When the inner diameter and the outer diameter of the actual section profile are ensured to be matched with the standard inner diameter and the standard outer diameter, whether the product accurately meets the standard is confirmed through the thickness of the wire side of the more accurate cable connector, so that the cable tightly combined and penetrated into the cable is realized, and the functions of water resistance, vibration resistance and explosion prevention are ensured.
In this embodiment, a binary image contour extraction algorithm or the like may be used to extract the coordinate position of each pixel on the actual cross-sectional contour, and scale the coordinate position to a size equal to that of the standard cross-sectional contour. If the coordinate position of each pixel on the actual section contour is coincident with the coordinate position of each pixel on the standard section contour, the comparison result of the two is proved to be contour coincidence, otherwise, the contour is not coincident.
The thickness of the cable joint consisting of the inner diameter and the outer diameter will be discussed further only after the inner diameter and the outer diameter of the cable joint meet preset criteria. When either the inside diameter or the outside diameter Zhang Gong of the cable joint does not meet the preset criteria, indicating the presence of a production defect, the cable joint does not meet the factory requirements.
In a specific embodiment, as shown in fig. 5, in step S140, the laser displacement sensing module is controlled to detect according to the measurement position point, and specifically includes the following steps:
s141, acquiring a space coordinate to be measured corresponding to the measurement position point in the measurement space.
S142, acquiring space positioning coordinates corresponding to the laser displacement sensing module in a measurement space based on the measuring range and the space coordinates to be measured of the laser displacement sensing module.
S143, controlling the laser displacement supporting mechanism to move the laser displacement sensing module to the space positioning coordinates so that the laser displacement sensing module detects according to the measuring position points.
Specifically, since the plane in which all the measurement position points on the cable joint cross section are located may not be on the same horizontal line or the same vertical line with respect to the plane in which the laser displacement sensing module is located, the laser displacement supporting mechanism is required to adjust the relative position of the laser displacement sensing module in real time according to different measurement position points. Meanwhile, the embodiment can also control the laser displacement sensing module to face or be away from the section of the cable joint so as to adapt to the sections of the cable joints with different shapes.
The space coordinate to be measured is the starting measuring point (x, y, z) of the laser displacement sensing module in the current system space. When the position is determined, three-dimensional distance judgment is carried out through the space position (x 1, y1, z 1) where the current laser displacement sensing module is located, the moving distance between each dimension and the (x, y, z) is obtained, and distance differences dx, dy and dz are formed, so that the corresponding distance differences are respectively moved along three directions through the laser displacement supporting mechanism, and the laser displacement sensing module is conveyed to reach a designated measuring point (x, y, z) at the starting time.
In a specific embodiment, the standard cross-sectional specification further comprises a characteristic line standard thickness. As shown in fig. 6, in step S140, the thickness detection compliance result of the cable connector to be tested is confirmed according to the thickness of the position point, which specifically includes the following steps:
s144, if the thickness of the position point is different from the standard thickness of the characteristic line, outputting a prompt that the thickness of the cable connector to be tested is not in accordance with the compliance requirement.
S145, outputting a prompt that the thickness of the cable connector to be tested meets the compliance requirement if the thickness of the position point is equal to the standard thickness of the characteristic line.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
According to the measuring method based on the laser displacement, standard section specifications of different cable joints are read, and measuring position points are determined based on section shapes and characteristic lines; when the longest standard diameter is smaller than or equal to a default length supporting range of the cable connector bearing mechanism, sending a thickness detection instruction to the laser displacement supporting mechanism, wherein the thickness detection instruction comprises a measuring position point; and controlling the laser displacement sensing module to detect according to the measured position point, obtaining the thickness of the position point, and confirming the thickness detection compliance result of the cable joint to be measured according to the thickness of the position point. The method can flexibly adjust the position of the laser displacement sensing module according to the cross section shapes of different cable joints, and can perform non-contact width detection, thereby effectively improving the efficiency and high accuracy of testing the width of various cable joints.
In an embodiment, a measuring device based on laser displacement is provided, and the measuring device based on laser displacement corresponds to the measuring method based on laser displacement in the above embodiment one by one. As shown in fig. 7, the laser displacement-based measuring device includes:
the laser displacement supporting mechanism 20 is used for supporting the laser displacement sensing module to realize six-way movement, so as to control the scanning range of the laser generator to cover the cable joint to be tested.
The laser displacement sensing module 30, the laser generator of the laser displacement sensing module faces the section of the cable joint to be measured, so as to emit laser to the section of the cable joint to be measured, thereby obtaining the thickness of the cable joint.
The cable connector carrying mechanism 40 is used for carrying and clamping the cable connector to be tested.
The controller 10 is electrically connected with the laser displacement sensing module and the laser displacement supporting mechanism respectively, and is used for receiving the laser image signal sent by the laser displacement sensing module and controlling the laser displacement supporting mechanism to realize six-way movement, and each functional module in the controller is described in detail as follows:
the section specification obtaining module 110 is configured to obtain a standard section specification of the cable connector to be tested, where the standard section specification includes a section shape and a standard length of a characteristic line, and the standard length of the characteristic line includes a longest standard diameter.
The measurement location point determination module 120 is configured to determine a measurement location point based on the cross-sectional shape and the feature line.
And the detection instruction sending module 130 is configured to send a thickness detection instruction to the laser displacement support mechanism if the longest standard diameter is less than or equal to a default length support range of the cable joint bearing mechanism, where the thickness detection instruction includes a measurement location point.
And the compliance result confirmation module 140 is used for controlling the laser displacement sensing module to detect according to the measured position points, obtaining the thickness of the position points and confirming the thickness detection compliance result of the cable joint to be tested according to the thickness of the position points.
Preferably, the laser displacement-based measuring device further includes:
and the default length adjusting module is used for adjusting the default length support of the cable joint bearing mechanism to be the longest standard diameter if the longest standard diameter is larger than the default length support range of the cable joint bearing mechanism, and continuously executing the step of sending the thickness detection instruction to the laser displacement support mechanism.
Preferably, the laser displacement-based measuring device further includes:
the comparison result acquisition module is used for acquiring an actual cross-section image of the cable joint to be tested through the camera, acquiring an actual cross-section profile of the actual cross-section image, comparing the actual cross-section profile with a standard cross-section profile, and acquiring a comparison result.
And the contour coincidence module is used for continuously executing the step of acquiring the standard section specification of the cable joint to be tested if the comparison result is contour coincidence.
And the contour non-coincidence module is used for outputting a prompt of non-compliance of the inner diameter or the outer diameter of the cable connector to be tested if the comparison result is that the contour is non-coincidence.
Preferably, the comparison result obtaining module includes:
an actual cross-sectional profile extraction sub-module for extracting an actual inner diameter and an actual outer diameter of the actual cross-sectional profile.
The standard inner diameter comparison submodule is used for comparing the actual inner diameter with the standard inner diameter and comparing the actual outer diameter with the standard outer diameter.
And the inner diameter coincidence submodule is used for outputting a comparison result to be contour coincidence if the actual inner diameter coincides with the standard inner diameter and the actual outer diameter coincides with the standard outer diameter.
And the inner diameter non-coincident submodule is used for outputting a comparison result to be that the contour is non-coincident if the actual inner diameter is not fully coincident with the standard inner diameter or the actual outer diameter is not fully coincident with the standard outer diameter.
Preferably, the compliance result validation module 140 includes:
and the coordinate to be measured obtaining sub-module is used for obtaining the space coordinate to be measured corresponding to the measurement position point in the measurement space.
And the positioning coordinate acquisition sub-module is used for acquiring the space positioning coordinate corresponding to the laser displacement sensing module in the measurement space based on the measuring range and the space coordinate to be measured of the laser displacement sensing module.
And the laser displacement moving sub-module is used for controlling the laser displacement supporting mechanism to move the laser displacement sensing module to the space positioning coordinates so that the laser displacement sensing module detects according to the measuring position points.
Preferably, the compliance result validation module 140 includes:
and the thickness-inconsistent prompt output sub-module is used for outputting a prompt that the thickness of the cable joint to be tested is inconsistent with the compliance requirement if the thickness of the position point is not equal to the standard thickness of the characteristic line.
And the thickness conforming prompt output sub-module is used for outputting a prompt that the thickness of the cable joint to be tested conforms to the compliance requirement if the thickness of the position point is equal to the standard thickness of the characteristic line.
For specific limitations on the laser displacement-based measuring device, reference may be made to the above limitations on the laser displacement-based measuring method, and no further description is given here. The various modules in the laser displacement-based measuring device described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or independent of a processor in the electronic device, or may be stored in software in a memory in the electronic device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, an electronic device is provided, which may be a server, and an internal structure thereof may be as shown in fig. 8. The electronic device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a non-volatile medium, an internal memory. The non-volatile medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile media. The database of the electronic device is used for data related to the laser displacement-based measurement method. The network interface of the electronic device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a laser displacement based measurement method.
In an embodiment, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor executes the computer program to implement the laser displacement-based measurement method of the above embodiment, for example, S110 to S140 shown in fig. 2. Alternatively, the processor may perform the functions of the modules/units of the laser displacement-based measuring device in the above embodiments, such as the functions of the modules 10 to 40 shown in fig. 7, when executing a computer program. To avoid repetition, no further description is provided here.
In an embodiment, a computer readable medium is provided, on which a computer program is stored, which when executed by a processor implements the laser displacement-based measurement method of the above embodiment, for example, S10 to S140 shown in fig. 2. Alternatively, the computer program, when executed by a processor, implements the functions of the modules/units in the laser displacement-based measuring device in the above-described device embodiments, such as the functions of the modules 10 to 40 shown in fig. 7. To avoid repetition, no further description is provided here.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable medium that when executed comprises the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments of the present application may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A method for measuring displacement based on laser, comprising:
obtaining standard section specifications of a cable joint to be tested, wherein the standard section specifications comprise a section shape and a characteristic line standard length, and the characteristic line standard length comprises the longest standard diameter;
determining a measurement location point based on the cross-sectional shape;
if the longest standard diameter is smaller than or equal to a default length supporting range of the cable connector bearing mechanism, sending a thickness detection instruction to the laser displacement supporting mechanism, wherein the thickness detection instruction comprises the measuring position point;
and controlling a laser displacement sensing module to detect according to the measured position points, obtaining the thickness of the position points, and confirming the thickness detection compliance result of the cable connector to be tested according to the thickness of the position points.
2. The laser displacement based measurement method of claim 1, further comprising, prior to said if said longest standard diameter is less than or equal to a default length support range for a cable splice carrier:
and if the longest standard diameter is larger than a default length supporting range of the cable joint bearing mechanism, adjusting the default length supporting range of the cable joint bearing mechanism to be the longest standard diameter, and continuously executing the step of sending the thickness detection instruction to the laser displacement supporting mechanism.
3. The laser displacement based measurement method of claim 1, wherein the standard cross-sectional specification comprises a standard cross-sectional profile;
before the standard section specification of the cable joint to be tested is obtained, the method further comprises the following steps:
acquiring an actual cross-section image of the cable joint to be tested through a camera, acquiring an actual cross-section profile of the actual cross-section image, comparing the actual cross-section profile with the standard cross-section profile, and acquiring a comparison result;
if the comparison result is that the profiles coincide, continuing to execute the step of acquiring the standard section specification of the cable joint to be tested;
and if the comparison result is that the outlines are not coincident, outputting a prompt that the inner diameter or the outer diameter of the cable joint to be tested is not compliant.
4. A laser displacement based measurement method according to claim 3, wherein the standard cross-sectional profile comprises a standard inner diameter and a standard outer diameter;
the comparing the actual section profile with the standard section profile to obtain a comparison result comprises:
extracting an actual inner diameter and an actual outer diameter of the actual cross-sectional profile;
comparing the actual inner diameter with the standard inner diameter, and comparing the actual outer diameter with the standard outer diameter;
outputting the comparison result as contour coincidence if the actual inner diameter coincides with the standard inner diameter and the actual outer diameter coincides with the standard outer diameter;
and if the actual inner diameter is not completely overlapped with the standard inner diameter or the actual outer diameter is not completely overlapped with the standard outer diameter, outputting the comparison result to be that the contour is not overlapped.
5. The laser displacement-based measurement method of claim 1, wherein controlling the laser displacement sensing module to detect at the measurement location point comprises:
acquiring a space coordinate to be measured corresponding to the measurement position point in a measurement space;
based on the measuring range of the laser displacement sensing module and the space coordinate to be measured, acquiring a space positioning coordinate corresponding to the laser displacement sensing module in the measuring space;
and controlling the laser displacement supporting mechanism to move the laser displacement sensing module to the space positioning coordinate so that the laser displacement sensing module detects according to the measuring position point.
6. The laser displacement based measurement method of claim 1, wherein the standard cross-section specification further comprises a characteristic line standard thickness;
and confirming a thickness detection compliance result of the cable joint to be detected according to the thickness of the position point, wherein the method comprises the following steps of:
if the thickness of the position point is not equal to the standard thickness of the characteristic line, outputting a prompt that the thickness of the cable joint to be tested is not in accordance with the compliance requirement;
and if the thickness of the position point is equal to the standard thickness of the characteristic line, outputting a prompt that the thickness of the cable joint to be tested meets the compliance requirement.
7. A laser displacement-based measurement device, comprising:
the cable joint bearing mechanism is used for bearing and clamping the cable joint to be tested;
the laser displacement sensing module is used for emitting laser to the section of the cable joint to be tested so as to acquire the thickness of the cable joint;
the laser displacement supporting mechanism is used for supporting the laser displacement sensing module to realize six-way movement, so that the scanning range of the laser generator is controlled to cover the cable joint to be tested;
the controller is electrically connected with the laser displacement sensing module and the laser displacement supporting mechanism respectively and is used for receiving laser image signals sent by the laser displacement sensing module and controlling the laser displacement supporting mechanism to realize six-way movement, and the controller comprises the following modules:
the section specification acquisition module is used for acquiring standard section specifications of the cable joint to be tested, wherein the standard section specifications comprise a section shape and a characteristic line standard length, and the characteristic line standard length comprises the longest standard diameter;
a measurement location point determination module for determining a measurement location point based on the cross-sectional shape;
the detection instruction sending module is used for sending a thickness detection instruction to the laser displacement supporting mechanism if the longest standard diameter is smaller than or equal to a default length supporting range of the cable joint bearing mechanism, and the thickness detection instruction comprises the measurement position point;
and the compliance result confirmation module is used for controlling the laser displacement sensing module to detect according to the measured position points, obtaining the thickness of the position points and confirming the thickness detection compliance result of the cable joint to be tested according to the thickness of the position points.
8. The laser displacement based measurement device of claim 7, wherein the cable connector carrier comprises two opposing gripping structures, each gripping structure enabling adjustment of a default length support range between the two gripping structures by a conveyor mechanism located on an underside of the gripping structure.
9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the laser displacement based measurement method according to any one of claims 1 to 7 when executing the computer program.
10. A computer readable medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the laser displacement-based measurement method according to any one of claims 1 to 7.
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