CN117943680B - Method and system for destroying hard disk by laser - Google Patents
Method and system for destroying hard disk by laser Download PDFInfo
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- CN117943680B CN117943680B CN202410293575.0A CN202410293575A CN117943680B CN 117943680 B CN117943680 B CN 117943680B CN 202410293575 A CN202410293575 A CN 202410293575A CN 117943680 B CN117943680 B CN 117943680B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010408 sweeping Methods 0.000 claims abstract description 73
- 230000006378 damage Effects 0.000 claims abstract description 17
- 238000004422 calculation algorithm Methods 0.000 claims abstract description 15
- 238000000605 extraction Methods 0.000 claims abstract description 10
- 238000003384 imaging method Methods 0.000 claims description 36
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 238000013507 mapping Methods 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims description 3
- 238000004590 computer program Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/03—Observing, e.g. monitoring, the workpiece
- B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
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- Optics & Photonics (AREA)
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- Mechanical Engineering (AREA)
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Abstract
The invention relates to the technical field of hard disk destruction, in particular to a method and a system for destroying hard disk by laser, wherein the method comprises the following steps: identifying and marking the position information of each hard disk in the first position mark image based on an image feature extraction algorithm of the circular features; and setting a moving destroying path of the laser transmitting head and the sweeping amplitude, frequency and moving speed of each node on the path based on the position information of each hard disk. The method and the device have the advantages that the position relation of the plurality of hard disk disks in the first position mark image is identified, the corresponding destroying path is formulated, so that the destroying operation of the plurality of hard disk disks on the destroying station is finished, and the destroying efficiency of the hard disk disks is improved; secondly, the scanning amplitude, the frequency and the moving speed of the laser head on each hard disk are formulated based on the specification size and the position of each hard disk, the destroying time of a single hard disk is shortened, and the destroying efficiency is further improved.
Description
Technical Field
The invention relates to the technical field of hard disk destruction, in particular to a method and a system for destroying hard disk by laser.
Background
The common destroying mode of the hard disk is mechanical destruction, but for some hard disk with higher security level, laser is generally adopted to perform surface directional destroying, so that files are prevented from being recovered to cause leakage, the existing mode of destroying the hard disk by laser is that operators are required to ensure that each hard disk is effectively destroyed, and hard disk disks with different specifications are manually placed in a fixed area of a destroying station one by one to be destroyed, however, along with popularization of a visual algorithm and an artificial intelligence algorithm, how to enable destroying equipment to automatically identify positions of a plurality of hard disk disks on a table top and effectively destroy each hard disk, so that the destroying efficiency of the hard disk disks is effectively improved becomes a technical problem to be solved.
Disclosure of Invention
The invention aims to provide a method and a system for destroying hard disk sheets by laser so as to solve the problems.
In order to achieve the above object, the embodiment of the present application provides the following technical solutions:
In one aspect, an embodiment of the present application provides a method for destroying a hard disk by using laser, where the method includes: acquiring a first position mark image, wherein the first position mark image is an image of a plurality of hard disk sheets on a destruction table, which is shot by a camera arranged on a laser emission head under the drive of a moving mechanism; identifying and marking the position information of each hard disk in the first position mark image by an image feature extraction algorithm based on the circular features, wherein the position information comprises the outline shape and the central coordinate parameters of the hard disk; setting a moving destroying path of the laser transmitting head and the sweeping amplitude, frequency and moving speed of each node on the path based on the position information of each hard disk, wherein one hard disk corresponds to one node; the method for preparing the scanning amplitude, the frequency and the moving speed of each node on a moving destroying path and a path of the laser transmitting head based on the position information of each hard disk disc comprises the following steps: acquiring a central coordinate parameter of each hard disk and a second coordinate parameter of a current laser transmitting head, and formulating a moving line of the laser transmitting head based on the second coordinate parameter and the plurality of central coordinate parameters; and setting the sweeping amplitude, the sweeping frequency and the moving speed on the corresponding nodes based on the outline shape and the central coordinate parameters of each hard disk.
Optionally, setting the sweeping amplitude, the sweeping frequency and the moving speed on the corresponding node based on the outline shape and the central coordinate parameter of each hard disk disc comprises:
Calculating distance values of the center point of the current hard disk disc from fixed points of the four moving mechanisms based on the center coordinate parameters, and screening out shortest distance values from the four distance values to serve as first center distance reference values, wherein the first center distance reference values are used for representing the distance between the current hard disk disc and the fixed point of the nearest moving mechanism, and the distance is used for representing the vibration suppression effect of the moving mechanism on the laser emission head;
Identifying a first diameter corresponding to the outline shape of the current hard disk based on an image identification algorithm, setting a sweeping amplitude corresponding to a laser emission head based on the first diameter, and marking the sweeping amplitude as the first sweeping amplitude;
finding a corresponding sweeping frequency reference range in a device operation parameter comparison table based on the first sweeping amplitude and the first center distance reference value, randomly distributing one sweeping frequency in the sweeping frequency reference range as the corresponding sweeping frequency of the current hard disk sheet, and marking the sweeping frequency as the first sweeping frequency, wherein the device operation parameter comparison table is a mapping relation of a plurality of sweeping amplitudes, sweeping frequencies and center distance reference values obtained through a test;
and setting the moving speed of the moving mechanism at the corresponding node of the current hard disk based on the first sweeping frequency.
Optionally, after the image feature extraction algorithm based on the circular feature identifies and marks the position information of each hard disk in the first position mark image, the method further includes:
detecting whether the outlines of the plurality of hard disk discs are overlapped or not, and if so, screening a second hard disk disc pattern closest to the center position of the image and a third hard disk disc pattern farthest from the center position of the image from the outlines of the plurality of hard disk discs in the first position mark image based on the center coordinate parameter of each hard disk disc;
Converting the second hard disk disc pattern and the third hard disk disc pattern into gray images, and further obtaining a second gray pattern and a third gray pattern;
measuring the contour widths of the second gray level pattern and the third gray level pattern in the first color difference threshold value, and further obtaining a second imaging contour width and a third imaging contour width, wherein the second imaging contour width and the third imaging contour width are used for representing the imaging definition of a camera and preventing the misjudgment of overlapping of a plurality of hard disk slice contours caused by imaging distortion of the camera;
if the average width of the second imaging contour width and the average width of the third imaging contour width are smaller than a preset threshold, judging that the imaging of the camera is normal, suspending the execution of the destruction operation, and sending a first early warning instruction to enable an operator to readjust the positions of a plurality of hard disk discs on the destruction table, record that the operation of an operator is abnormal at one time, count the abnormal operation times corresponding to the operator in one quarter, and further judge the quarter work performance corresponding to the operator;
And if the average width of the second imaging contour width and the average width of the third imaging contour width are larger than a preset threshold, a second early warning instruction is sent so that an operator can adjust the aperture of the camera to enable the imaging of the camera to be clear.
In a second aspect, the present embodiment provides a system for destroying a hard disk by using laser, where the system includes:
the first acquisition module is used for acquiring a first position mark image, wherein the first position mark image is an image of a plurality of hard disk sheets on the destruction table, which is shot by a camera arranged on the laser emission head under the drive of the moving mechanism;
the first computing module is used for identifying and marking the position information of each hard disk in the first position mark image based on an image feature extraction algorithm of the circular feature, wherein the position information comprises the outline shape and the central coordinate parameter of the hard disk;
The second calculation module is used for making a moving destruction path of the laser emission head and the sweeping amplitude, frequency and moving speed of each node on the path based on the position information of each hard disk, wherein one hard disk corresponds to one node;
wherein the second computing module comprises:
the first acquisition unit is used for acquiring the central coordinate parameter of each hard disk and the second coordinate parameter of the current laser emission head, and formulating a moving line of the laser emission head based on the second coordinate parameter and the plurality of central coordinate parameters;
and the first calculation unit is used for setting the sweeping amplitude, the sweeping frequency and the moving speed on the corresponding nodes based on the outline shape and the central coordinate parameters of each hard disk.
In a third aspect, an embodiment of the present application provides an apparatus for destroying a hard disk with laser, where the apparatus includes a memory and a processor.
The memory is used for storing a computer program; the processor is used for realizing the method for destroying the hard disk by the laser when executing the computer program.
In a fourth aspect, an embodiment of the present application provides a medium, where a computer program is stored, where the computer program when executed by a processor implements the steps of the method for destroying a hard disk by laser described above.
The beneficial effects of the invention are as follows:
the method and the device have the advantages that the position relation of the plurality of hard disk disks in the first position mark image is identified, the corresponding destroying path is formulated, so that the destroying operation of the plurality of hard disk disks on the destroying station is finished, and the destroying efficiency of the hard disk disks is improved;
Secondly, in the method of the invention, the sweeping amplitude, the frequency and the moving speed of the laser head on each hard disk are formulated based on the specification size and the position of each hard disk, the destroying time of a single hard disk is shortened as much as possible on the premise of ensuring the stable operation of the laser head, and the destroying efficiency is further improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for destroying hard disk by laser according to an embodiment of the invention.
Detailed Description
Example 1:
as shown in fig. 1, the present embodiment provides a method for destroying a hard disk by laser, which includes steps S100, S200, and S300.
Step S100, acquiring a first position mark image, wherein the first position mark image is an image of a plurality of hard disk sheets on a destroying station, which is shot by a camera arranged on a laser emission head under the drive of a moving mechanism, and is mainly used for marking the position information of the plurality of hard disk sheets on the destroying station;
Step 200, identifying and marking the position information of each hard disk in a first position mark image by an image feature extraction algorithm based on circular features, wherein the position information comprises the outline shape and the central coordinate parameters of the hard disk;
Step S300, setting a moving destroying path of a laser transmitting head and a sweeping amplitude, a frequency and a moving speed of each node on the path based on the position information of each hard disk, wherein one hard disk corresponds to one node;
The specific implementation manner of setting the moving destruction path of the laser emission head and the sweeping amplitude, frequency and moving speed of each node on the path based on the position information of each hard disk in step S300 is as follows:
Step S310, acquiring a central coordinate parameter of each hard disk and a second coordinate parameter of a current laser emission head, and formulating a moving line of the laser emission head based on the second coordinate parameter and the plurality of central coordinate parameters;
Step S320, setting the sweeping amplitude, the sweeping frequency and the moving speed on the corresponding nodes based on the outline shape and the central coordinate parameters of each hard disk.
Before explanation, the installation and operation modes of the laser emission head are explained, the laser emission head is installed on a moving mechanism, the moving mechanism is fixed above the destroying table through four fixed columns, the moving mechanism is provided with the laser emission head and drives the laser emission head to move above the destroying table, however, the laser emission head has vibration in a working state, the vibration magnitude is related to the position, the sweeping amplitude and the sweeping frequency of the laser emission head, the influence of the position on the working vibration of the laser emission head mainly depends on the shortest distance between the laser emission head and the four fixed columns under the condition that the sweeping amplitude and the sweeping frequency are fixed, namely, the influence of the nearest fixed column on the working vibration of the laser emission head is the largest, and the sweeping amplitude of each specification size is fixed, more consideration is given to the vibration influence of different sweeping frequencies and sweeping positions on the laser emission head, and the best operation parameter comparison table of corresponding equipment can be obtained through the previous implementation, so that implementation basis is provided for implementation of the scheme.
Next, the specific implementation manner of setting the sweeping amplitude, the sweeping frequency and the moving speed on the corresponding node based on the outline shape and the central coordinate parameter of each hard disk in step S320 is as follows:
step S321, calculating distance values of the center point of the current hard disk from fixed points of four moving mechanisms based on center coordinate parameters, and screening out the shortest distance value from the four distance values as a first center distance reference value, wherein the first center distance reference value is used for representing the distance between the current hard disk and the fixed point of the nearest moving mechanism, and the distance is used for representing the vibration suppression effect of the moving mechanism on the laser emission head;
Step S322, recognizing a first diameter corresponding to the outline shape of the current hard disk based on an image recognition algorithm, setting a sweeping amplitude corresponding to a laser emission head based on the first diameter, and marking the sweeping amplitude as the first sweeping amplitude;
Step S323, finding a corresponding sweeping frequency reference range in a device operation parameter comparison table based on the first sweeping amplitude and the first center distance reference value, randomly distributing a sweeping frequency in the sweeping frequency reference range as the corresponding sweeping frequency of the current hard disk sheet, and recording the sweeping frequency as the first sweeping frequency, wherein the device operation parameter comparison table is a mapping relation among a plurality of sweeping amplitudes, sweeping frequencies and center distance reference values obtained through a test;
step S324, setting the moving speed of the moving mechanism at the corresponding node of the current hard disk based on the first sweeping frequency.
Next, after the image feature extraction algorithm based on the circular feature described in step S200 identifies and marks the position information of each hard disk in the first position mark image, it needs to be determined whether there is an overlap between each hard disk, and it should be noted that, since it is determined whether there is an overlap through image identification, when an overlap is detected, it should be considered whether there is a misjudgment due to a camera focusing misalignment, which is implemented in the following way:
Step S210, detecting whether the outlines of a plurality of hard disk discs are overlapped, if so, screening a second hard disk disc pattern closest to the center position of the image and a third hard disk disc pattern farthest from the center position of the image from the outlines of the plurality of hard disk discs in the first position mark image based on the center coordinate parameter of each hard disk disc;
step S220, converting the second hard disk disc pattern and the third hard disk disc pattern into gray scale images, and further obtaining a second gray scale pattern and a third gray scale pattern;
Step S230, measuring the outline widths of the second gray level pattern and the third gray level pattern in the first color difference threshold value, and further obtaining a second imaging outline width and a third imaging outline width, wherein the second imaging outline width and the third imaging outline width are used for representing the imaging definition of a camera and preventing the misjudgment of overlapping of a plurality of hard disk outlines caused by imaging distortion of the camera;
Step S240, if the average width of the second imaging contour width and the average width of the third imaging contour width are smaller than a preset threshold, judging that the imaging of the camera is normal, suspending the execution of the destroying operation, and sending a first early warning instruction to enable an operator to readjust the positions of a plurality of hard disk discs on the destroying station and record one-time operation abnormality of the operator, counting the abnormal operation times corresponding to the operator in one quarter, and further judging the quarter work performance corresponding to the operator;
Step S250, if the average width of the second imaging contour width and the third imaging contour width is larger than a preset threshold, a second early warning instruction is sent to enable an operator to adjust the aperture of the camera, so that the imaging of the camera is clear.
Example 2:
The embodiment provides a system for destroying hard disk by laser, which comprises:
the first acquisition module is used for acquiring a first position mark image, wherein the first position mark image is an image of a plurality of hard disk sheets on the destruction table, which is shot by a camera arranged on the laser emission head under the drive of the moving mechanism;
the first computing module is used for identifying and marking the position information of each hard disk in the first position mark image based on an image feature extraction algorithm of the circular feature, wherein the position information comprises the outline shape and the central coordinate parameter of the hard disk;
The second calculation module is used for making a moving destruction path of the laser emission head and the sweeping amplitude, frequency and moving speed of each node on the path based on the position information of each hard disk, wherein one hard disk corresponds to one node;
wherein the second computing module comprises:
the first acquisition unit is used for acquiring the central coordinate parameter of each hard disk and the second coordinate parameter of the current laser emission head, and formulating a moving line of the laser emission head based on the second coordinate parameter and the plurality of central coordinate parameters;
and the first calculation unit is used for setting the sweeping amplitude, the sweeping frequency and the moving speed on the corresponding nodes based on the outline shape and the central coordinate parameters of each hard disk.
It should be noted that, regarding the apparatus in the above embodiments, the specific manner in which the respective modules perform the operations has been described in detail in the embodiments regarding the method, and will not be described in detail herein.
Claims (2)
1. A method for destroying hard disk platters by laser, the method comprising:
Acquiring a first position mark image, wherein the first position mark image is an image of a plurality of hard disk sheets on a destruction table, which is shot by a camera arranged on a laser emission head under the drive of a moving mechanism;
Identifying and marking the position information of each hard disk in the first position mark image by an image feature extraction algorithm based on the circular features, wherein the position information comprises the outline shape and the central coordinate parameters of the hard disk;
Setting a moving destroying path of the laser transmitting head and the sweeping amplitude, frequency and moving speed of each node on the path based on the position information of each hard disk, wherein one hard disk corresponds to one node;
the method for preparing the scanning amplitude, the frequency and the moving speed of each node on a moving destroying path and a path of the laser transmitting head based on the position information of each hard disk disc comprises the following steps:
acquiring a central coordinate parameter of each hard disk and a second coordinate parameter of a current laser transmitting head, and formulating a moving line of the laser transmitting head based on the second coordinate parameter and the plurality of central coordinate parameters;
Setting sweeping amplitude, sweeping frequency and moving speed on corresponding nodes based on the outline shape and central coordinate parameters of each hard disk;
the method for setting the sweeping amplitude, the sweeping frequency and the moving speed on the corresponding nodes based on the outline shape and the central coordinate parameters of each hard disk comprises the following steps:
Calculating distance values of the center point of the current hard disk from four fixed points of the moving mechanism based on the center coordinate parameters, and screening out the shortest distance value from the four distance values as a first center distance reference value, wherein the first center distance reference value is used for representing the distance between the current hard disk and the fixed point of the nearest moving mechanism, and the distance is used for representing the vibration suppression effect of the moving mechanism on the laser emission head;
Identifying a first diameter corresponding to the outline shape of the current hard disk based on an image identification algorithm, setting a sweeping amplitude corresponding to a laser emission head based on the first diameter, and marking the sweeping amplitude as the first sweeping amplitude;
finding a corresponding sweeping frequency reference range in a device operation parameter comparison table based on the first sweeping amplitude and the first center distance reference value, randomly distributing one sweeping frequency in the sweeping frequency reference range as the corresponding sweeping frequency of the current hard disk sheet, and marking the sweeping frequency as the first sweeping frequency, wherein the device operation parameter comparison table is a mapping relation of a plurality of sweeping amplitudes, sweeping frequencies and center distance reference values obtained through a test;
Setting the moving speed of the moving mechanism at the node corresponding to the current hard disk based on the first sweeping frequency;
The image feature extraction algorithm based on the circular feature identifies and marks the position information of each hard disk in the first position mark image, and then further comprises:
detecting whether the outlines of the plurality of hard disk discs are overlapped or not, and if so, screening a second hard disk disc pattern closest to the center position of the image and a third hard disk disc pattern farthest from the center position of the image from the outlines of the plurality of hard disk discs in the first position mark image based on the center coordinate parameter of each hard disk disc;
Converting the second hard disk disc pattern and the third hard disk disc pattern into gray images, and further obtaining a second gray pattern and a third gray pattern;
measuring the contour widths of the second gray level pattern and the third gray level pattern in the first color difference threshold value, and further obtaining a second imaging contour width and a third imaging contour width, wherein the second imaging contour width and the third imaging contour width are used for representing the imaging definition of a camera and preventing the misjudgment of overlapping of a plurality of hard disk slice contours caused by imaging distortion of the camera;
if the average width of the second imaging contour width and the average width of the third imaging contour width are smaller than a preset threshold, judging that the imaging of the camera is normal, suspending the execution of the destruction operation, and sending a first early warning instruction to enable an operator to readjust the positions of a plurality of hard disk discs on the destruction table, record that the operation of an operator is abnormal at one time, count the abnormal operation times corresponding to the operator in one quarter, and further judge the quarter work performance corresponding to the operator;
And if the average width of the second imaging contour width and the average width of the third imaging contour width are larger than a preset threshold, a second early warning instruction is sent so that an operator can adjust the aperture of the camera to enable the imaging of the camera to be clear.
2. A system adapted for use in the method of laser destruction of hard disk platters of claim 1, said system comprising:
the first acquisition module is used for acquiring a first position mark image, wherein the first position mark image is an image of a plurality of hard disk sheets on the destruction table, which is shot by a camera arranged on the laser emission head under the drive of the moving mechanism;
the first computing module is used for identifying and marking the position information of each hard disk in the first position mark image based on an image feature extraction algorithm of the circular feature, wherein the position information comprises the outline shape and the central coordinate parameter of the hard disk;
The second calculation module is used for making a moving destruction path of the laser emission head and the sweeping amplitude, frequency and moving speed of each node on the path based on the position information of each hard disk, wherein one hard disk corresponds to one node;
wherein the second computing module comprises:
the first acquisition unit is used for acquiring the central coordinate parameter of each hard disk and the second coordinate parameter of the current laser emission head, and formulating a moving line of the laser emission head based on the second coordinate parameter and the plurality of central coordinate parameters;
and the first calculation unit is used for setting the sweeping amplitude, the sweeping frequency and the moving speed on the corresponding nodes based on the outline shape and the central coordinate parameters of each hard disk.
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