Contact image sensor, crack change monitoring device and cleaning method

Abstract

The present invention provides a contact image sensor device, a crack change monitoring device and a cleaning method. The contact image sensor device includes: a frame; a light-transmitting plate connected to the frame to form a receiving cavity; a light source located in the receiving cavity, the light source is used to illuminate the wall and cracks at the position to be detected; an optical lens located in the receiving cavity, at least one light source is provided on the periphery of the optical lens; a photoelectric conversion chip is arranged corresponding to the optical lens, the photoelectric conversion chip is used to convert the light signal emitted by the optical lens into an electrical signal; a cleaning device includes a first driving part and a cleaning component connected to the first driving part, under the driving action of the first driving part, the cleaning component moves relative to the light-transmitting plate, so as to remove foreign matter on the surface of the light-transmitting plate facing the position to be detected. The technical solution of the present invention facilitates the use of its own cleaning device to clean the light-transmitting plate of the contact image sensor device.

Description

Technical Field

[0001] The present invention relates to the technical field of crack monitoring, and in particular to a contact image sensor device, a contact image sensor device, a crack change monitoring device and a cleaning method. Background Art

[0002] In the field of crack monitoring technology, the contact image sensor device in the crack change monitoring device is used for crack width detection and crack width change monitoring of the wall. The contact image sensor device needs to be outdoors for a long time, and the use conditions are relatively harsh, and it is easy to be contaminated with dust or water stains. If there are foreign objects such as dust or stains on the contact image sensor device, it will directly affect the detection results of the image sensor device scanning, and even the detection image cannot be obtained.

[0003] In the prior art, no cleaning device is provided in the contact image sensor device. In order to clean the light-transmitting plate of the contact image sensor device, manual on-site cleaning is usually adopted. However, since the contact image sensor device used outdoors is generally capable of remote control, if the dust or stains on the contact image sensor device are manually handled, it will inevitably cause problems such as increased maintenance costs and inconvenient operation. Summary of the invention

[0004] The main purpose of the present invention is to provide a contact image sensor device, which is convenient for cleaning a light-transmitting plate of the contact image sensor device by using a cleaning component provided therewith.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a contact image sensor device is provided, which includes: a frame; a light-transmitting plate connected to the frame to form a receiving cavity; a light source located in the receiving cavity, the light source being used to illuminate the wall and cracks at a position to be detected; an optical lens located in the receiving cavity, at least one light source being provided on the periphery of the optical lens; a photoelectric conversion chip being provided corresponding to the optical lens, the photoelectric conversion chip being used to convert a light signal emitted by the optical lens into an electrical signal; and a cleaning device including a first driving unit and a cleaning assembly connected to the first driving unit, wherein under the driving action of the first driving unit, the cleaning assembly moves relative to the light-transmitting plate, thereby being able to remove foreign matter on the surface of the light-transmitting plate facing the position to be detected.

[0006] Furthermore, the cleaning assembly further includes a first transmission part, the cleaning assembly and the first driving part are both connected to the first transmission part, and the cleaning assembly is movably arranged relative to the light-transmitting plate.

[0007] Further, the first transmission part includes: a first driving wheel, connected to the first driving part; a first driven wheel; a belt, sleeved on the outer circumference of the first driving wheel and the first driven wheel, and the cleaning component is connected to the belt; or, the first transmission part includes: a driving gear, connected to the first driving part; a driven gear; a chain, the driving gear and the driven gear are both meshed with the chain, and the cleaning component is connected to the chain.

[0008] Furthermore, the cleaning assembly includes: a substrate connected to the first driving part; and a cleaning member connected to the substrate.

[0009] According to another aspect of the present invention, a crack change monitoring device is provided, which includes: a box body, the box body having a detection surface, and the detection surface is arranged at a position to be detected; a contact image sensor device is located in the box body; wherein the contact image sensor device is the above-mentioned contact image sensor device.

[0010] Furthermore, the crack change monitoring device also includes a reference sample, and the reference sample is movably arranged relative to the light-transmitting plate.

[0011] Furthermore, the crack change monitoring device also includes: a second driving part, located in the box body; a second transmission part, located in the box body, and the second transmission part is connected to the second driving part; a placement plate, located in the box body and connected to the second transmission part; the reference sample is arranged on the placement plate, and under the driving action of the second driving part, the second transmission part drives the placement plate to move linearly.

[0012] Furthermore, the second transmission part includes: a second driving wheel, connected to the second driving part; a second driven wheel, spaced apart from the second driving wheel; a first conveyor belt, sleeved on the outer circumference of the second driving wheel and the second driven wheel; a third driven wheel, spaced apart from the second driven wheel; a second conveyor belt, arranged on the outer circumference of the second driven wheel and the third driven wheel, the extension direction of the first conveyor belt is perpendicular to the extension direction of the second conveyor belt, and the placement plate is connected to the second conveyor belt.

[0013] Furthermore, the crack change monitoring device also includes a storage box located in the box body, and the storage box is used to store reference samples.

[0014] Furthermore, the crack change monitoring device also includes a control device, which is connected to the first driving part wirelessly or by wire.

[0015] Furthermore, the cleaning assembly also includes a first transmission part, and a first driving wheel and a first driven wheel of the first transmission part are both connected to the box body.

[0016] According to another aspect of the present invention, a cleaning method using the above-mentioned contact image sensor device is provided. The cleaning method comprises the following step S10 of cleaning the surface of the light-transmitting plate using a cleaning component of the cleaning device.

[0017] Furthermore, the cleaning method further includes a step S20 of scanning the wall surface and the crack at the detection position using the contact image sensor device to obtain a current scan image and a step S30 of comparing the current scan image with a pre-stored image.

[0018] Furthermore, after step S30, the cleaning method further includes a judging step S35 of judging whether there is dust on the surface of the light-transmitting plate. If not, a step of saving the current scanned image is executed; if yes, step S10 is repeated.

[0019] Further, after the determination step S35, the cleaning method further includes the step of determining whether the number of cycles N of step S10 is greater than or equal to 3, if yes, executing the alarm step S40, if not, continuing to execute step S10.

[0020] According to another aspect of the present invention, a cleaning method for cleaning according to the above-mentioned crack change monitoring device is provided. The cleaning method comprises a step S10 of cleaning the surface of the light-transmitting plate by using a cleaning component of the cleaning device.

[0021] Furthermore, the cleaning method also includes the following steps: Step S05: moving the reference sample to the light-transmitting plate so that the reference sample covers the light-transmitting plate; Step S06: scanning the reference sample to obtain the current sample image, and comparing the current sample image with the pre-stored reference sample image; Step S08: determining whether there is dust on the light-transmitting plate, if so, executing Step S10; if not, executing the step of using a contact image sensor device to scan the wall and cracks at the position to be detected.

[0022] Further, when the number of times step S10 is repeated is N times, and N≥3, the cleaning method further includes an alarm step S40.

[0023] Furthermore, before step S05, the cleaning method further includes step S20 of scanning the wall surface and cracks at the detection position using a contact image sensor device to obtain a current scan image and step S30 of comparing the current scan image with a pre-stored image.

[0024] Furthermore, after step S30, the cleaning method further includes a step of determining whether there is dust on the light-transmitting plate, and if not, executing a step of saving the current scanned image; if yes, executing step S05.

[0025] By applying the technical solution of the present invention, under the driving action of the first driving unit, the cleaning component moves relative to the light-transmitting plate, so that foreign matter such as dust or stains on the surface of the light-transmitting plate facing the position to be detected can be directly removed without manually using other additional cleaning devices, thereby ensuring that the cleaning work is convenient to operate and saving labor costs; further, it avoids the problem that the contact image sensor device cannot correctly scan the object to be detected due to the contamination of foreign matter on the surface of the light-transmitting plate facing the position to be detected, thereby ensuring the scanning accuracy of the contact image sensor device and the quality of the scanned image. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 A schematic structural diagram of a contact image sensor device according to a crack change monitoring device of the present invention is shown (wherein a wall surface and cracks at a position to be detected are also shown);

[0028] Figure 2 Shows Figure 1 A left side view of a contact image sensor device;

[0029] Figure 3 It shows a schematic structural diagram of the second embodiment of the crack change monitoring device according to the present invention in cooperation with the wall surface and cracks at the position to be detected;

[0030] Figure 4 Shows Figure 3 Left view of the crack change monitoring device;

[0031] Figure 5 Shown according to Figure 1 A schematic flow chart of a cleaning method 1 for cleaning a contact image sensor device;

[0032] Figure 6 Shows Figure 1 A schematic diagram of a pre-stored image pre-stored in a contact image sensor device;

[0033] Figure 7 Shows the use of Figure 1 A schematic diagram of a current scanned image obtained by scanning a wall surface and a crack at a position to be detected by a contact image sensor device;

[0034] Figure 8 Shows the use of Figure 1 A schematic flow chart of a second cleaning method for cleaning a crack change monitoring device;

[0035] Fig. 9 Shown according to Figure 3 A schematic flow chart of a third cleaning method for cleaning a crack change monitoring device in the embodiment of the present invention;

[0036] Fig.10 Shows the use of Figure 3 A schematic diagram of a standard scanned image obtained by scanning a reference sample by a crack change monitoring device (the standard scanned image here refers to a scanned image obtained after scanning a sample without dust or stains);

[0037] Fig.11 Shows the use of Figure 3 A schematic diagram of a current scanned image obtained after the crack change monitoring device in the present invention scans the reference sample;

[0038] Fig.12 A voltage curve diagram showing a stain determination standard for a reference sample; and

[0039] Fig.13 Shows the use of Figure 3 A schematic flow chart of a fourth cleaning method for cleaning a crack change monitoring device.

[0040] The above drawings include the following reference numerals:

[0041] 10. Contact image sensor device; 11. Frame; 12. Light source; 13. Photoelectric conversion chip; 14. Transparent plate; 17. Optical lens; 18. Reference sample; 20. Cleaning device; 21. First driving unit; 22. Cleaning assembly; 221. Base plate; 222. Cleaning member; 23. First transmission unit; 231. First driving wheel; 232. First driven wheel; 233. Belt; 31. Second driving unit; 32. Second transmission unit; 321. Second driving wheel; 322. Second driven wheel; 323. First conveyor belt; 324. Third driven wheel; 325. Second conveyor belt; 33. Placement plate; 34. Storage box; 40. Control device; 50. Wall; 60. Crack. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0044] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0045] Embodiment 1

[0046] like Figure 1 and Figure 2 As shown, in the first embodiment of the present invention, the contact image sensor device includes a frame 11, a light-transmitting plate 14, a light source 12, an optical lens 17, a photoelectric conversion chip 13, and a cleaning device 20. The light-transmitting plate 14 is connected to the frame 11 to form a receiving cavity; the light source 12 is located in the receiving cavity, and the light source 12 is used to illuminate the wall 50 and the crack 60 at the position to be detected; the optical lens 17 is located in the receiving cavity, and at least one light source 12 is provided on the periphery of the optical lens 17; the photoelectric conversion chip 13 is arranged corresponding to the optical lens 17, and the photoelectric conversion chip is used to convert the optical signal emitted by the optical lens 17 into an electrical signal; the cleaning device 20 includes a first driving part 21 and a cleaning component 22 connected to the first driving part 21. Under the driving action of the first driving part 21, the cleaning component 22 moves relative to the light-transmitting plate 14, so as to remove foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected.

[0047] According to the above arrangement, under the driving action of the first driving unit 21, the cleaning component 22 moves relative to the light-transmitting plate 14, so that the foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected can be removed by using the cleaning component 22, without the need for maintenance personnel to use additional cleaning tools for cleaning as in the prior art, thereby ensuring that the cleaning work is convenient and saving labor costs; further, it avoids the situation where the contact image sensor device 10 cannot correctly scan the object to be detected due to the contamination of foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected, thereby ensuring the scanning accuracy of the contact image sensor device 10 and the quality of the scanned image.

[0048] It should be noted that the foreign matter mentioned in the present application mainly includes dust and stains, and the cleaning device 20 is mainly used to clean the dust and stains on the surface of the light-transmitting plate 14 facing the position to be detected.

[0049] like Figure 1 and Figure 2 As shown, in the first embodiment of the present invention, the cleaning assembly 22 further includes a first transmission part 23 , the cleaning assembly 22 and the first driving part 21 are both connected to the first transmission part 23 , and the cleaning assembly 22 is movably arranged relative to the light-transmitting plate 14 .

[0050] According to the above arrangement, the first driving part 21 applies the driving force to the first transmission part 23, so that the first transmission part 23 drives the cleaning component 22 to move relative to the light-transmitting plate 14. In this way, the cleaning component 22 can be used to remove foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected, thereby ensuring the accuracy of subsequent scanning by the contact image sensor device 10 and the quality of the scanned image.

[0051] It should be noted that the cleaning component 22 is in direct contact with the surface of the light-transmitting plate 14 facing the position to be detected, and the foreign matter on the surface of the light-transmitting plate 14 is removed by the friction force formed by the contact between the cleaning component 22 and the surface of the light-transmitting plate 14 facing the position to be detected. Figure 1 and Figure 2 As shown, in the first embodiment of the present invention, the first transmission part 23 includes a first driving wheel 231, a first driven wheel 232 and a belt 233. The first driving wheel 231 is connected to the first driving part 21; the belt 233 is sleeved on the outer periphery of the first driving wheel 231 and the first driven wheel 232, and the cleaning component 22 is connected to the belt 233.

[0052] According to the above arrangement, the first driving wheel 231 can drive the belt 233 to move back and forth between the first driving wheel 231 and the first driven wheel 232. Since the cleaning component 22 is fixed on the belt 233, the belt 233 drives the cleaning component 22 to move relative to the light-transmitting plate 14, thereby removing foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected, thereby ensuring the scanning accuracy of the contact image sensor device 10 and the quality of the scanned image.

[0053] Specifically, the first driving part 21 further includes a driving shaft. The first driving wheel 231 is sleeved on the outer circumference of the driving shaft, and the driving shaft can drive the first driving wheel 231 to rotate together. The first transmission part 23 further includes a driven shaft, and the first driven wheel 232 is sleeved on the outer circumference of the driven shaft, and the first driven wheel 232 can rotate relative to the driven shaft, and the driven shaft is fixed in the housing of the crack change monitoring device. The belt 233 is sleeved on the outer circumference of the first driving wheel 231 and the first driven wheel 232, and the cleaning component 22 is connected to the belt 233. The driving shaft can drive the first driving wheel 231 to rotate, thereby driving the belt 233 to reciprocate between the first driving wheel 231 and the first driven wheel 232. Since the cleaning component 22 is fixed on the belt 233, the belt 233 drives the cleaning component 22 to move relative to the light-transmitting plate 14, so that foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected can be removed, thereby ensuring the scanning accuracy of the contact image sensor device 10 and the quality of the scanned image.

[0054] Of course, in an alternative embodiment not shown in the drawings, the first transmission part 23 can be set as a chain transmission structure according to actual conditions. Specifically, the first transmission part 23 includes a driving gear, a driven gear, and a chain. Among them, the driving gear is connected to the first driving part 21, the driving gear and the driven gear are both meshed with the chain, and the cleaning component 22 is connected to the chain.

[0055] Preferably, the first driving part 21 is an asynchronous motor. Of course, in other alternative embodiments, the first driving part 21 can also be set as a cylinder.

[0056] Preferably, the cleaning assembly 22 and the belt 233 are detachably connected, such as threaded or snap-on, so that the belt 233 can be replaced or tightened later.

[0057] like Figure 2 As shown, in the first embodiment of the present invention, the cleaning assembly 22 includes a substrate 221 and a cleaning member 222 . The substrate 221 is connected to the first driving unit 21 , and the cleaning member 222 is connected to the substrate 221 .

[0058] According to the above arrangement, under the driving action of the first driving unit 21, the substrate 221 moves relative to the light-transmitting plate 14, and the substrate 221 drives the cleaning member 222 to move together, so that the cleaning member 222 can be used to remove foreign matter located on the surface of the light-transmitting plate 14 facing the position to be detected, thereby ensuring the scanning accuracy of the contact image sensor device 10 and the quality of the scanned image.

[0059] Specifically, the cleaning member 222 may be bonded to the substrate 221 , and the cleaning member 222 may be configured as a brush, a rag, a felt strip, or the like.

[0060] The present invention also provides a crack change monitoring device. The crack change monitoring device includes a box and a contact image sensor device 10. The box has a detection surface, which is arranged at a position to be detected; the contact image sensor device is located in the box, and the contact image sensor device is the contact image sensor device 10 mentioned above.

[0061] In the above configuration, the contact image sensor device 10 is disposed in the housing of the crack change monitoring device, and the surface of the light-transmitting plate 14 facing the position to be detected is attached to the detection surface of the housing, so that the housing can prevent external foreign matter from easily entering the housing and being contaminated on the light-transmitting plate 14, thereby effectively reducing the working frequency of the cleaning component 22, improving the cleaning efficiency of the cleaning component 22, and extending the service life of the cleaning component 22. The detection surface of the housing is set as a transparent glass surface, which does not affect the contact image sensor device 10 scanning the object to be detected, thereby ensuring that the contact image sensor device 10 can work normally. The contact image sensor device 10 is fixed in the housing of the crack change monitoring device, and the housing is used to support the contact image sensor device 10.

[0062] It should be noted that the crack change monitoring device also includes a crack change monitoring unit and an output device. The crack change monitoring unit is connected to the contact image sensor device 10, and obtains the width data of the crack 60 at different depths at the position to be detected according to the signal detected by the contact image sensor device 10. The output device is connected to the crack change monitoring unit to output in at least one way of display, storage record, and alarm. The crack change monitoring unit and the output device are both arranged in the box of the crack change monitoring device.

[0063] Of course, the contact image sensor device 10 in the first embodiment of the present invention is not limited to the crack change monitoring device, and the contact image sensor device 10 can also be integrated into other equipment according to actual needs.

[0064] like Figure 2 As shown, in the first embodiment of the present invention, the crack change monitoring device further includes a control device 40 , and the control device 40 is connected to the first driving part 21 by wire.

[0065] According to the above configuration, the control device 40 can be used to control the start and stop of the first driving unit 21, thereby controlling the cleaning component 22 to clean the surface of the light-transmitting plate 14, avoiding the need for staff to go directly to the site for manual cleaning, thereby reducing labor costs, saving time, and further improving the cleaning efficiency of the contact image sensor device 10.

[0066] Of course, in an alternative embodiment not shown in the drawings, when the control distance is too long, the control device 40 and the first driving unit 21 may be arranged to be wirelessly connected.

[0067] The present invention provides a first cleaning method using the contact image sensor device 10 as described above.

[0068] The cleaning method includes a step S10 of cleaning the surface of the light-transmitting plate 14 by using the cleaning assembly 22 of the cleaning device 20 .

[0069] According to the above step S10, the cleaning component 22 can remove foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected, thereby avoiding the problem that the contact image sensor device 10 cannot correctly scan the object to be detected due to the contamination of foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected, thereby ensuring the scanning accuracy and quality of the scanned image of the contact image sensor device 10. In the embodiment of the present invention, the object to be detected refers to the wall 50 and the crack 60 at the position to be detected.

[0070] In the embodiment of the present invention, the cleaning method further comprises step S20 of scanning the wall surface 50 and the crack 60 at the detection position using the contact image sensor device 10 to obtain a current scan image and step S30 of comparing the current scan image with a pre-stored image.

[0071] After step S30, the cleaning method further comprises a step S35 of judging whether there is dust on the surface of the light-transmitting plate 14. If not, a step of saving the current scanned image is performed; if yes, step S10 is repeated.

[0072] It should be noted that the analog output waveform of the contact image sensor device 10 is the waveform of the light emitted by the light source, which is irradiated on the scanned object through the light-transmitting plate 14. The scanned object reflects the light. The intensity of the light reflected by the scanned object of different colors is different. These reflected lights pass through the light-transmitting plate 14 and the self-focusing lens array and irradiate on the photoelectric conversion chip 13. The photoelectric conversion chip 13 converts the optical signal into an electrical signal. The stronger the optical signal, the higher the output electrical signal. When there is a stain on the light-transmitting plate 14, it will inevitably cause a change in the output. Based on this, it can be inferred that there is a stain on the light-transmitting plate.

[0073] For example, Figure 6 and Figure 7 As shown, Figure 6 The horizontal axis (X axis) represents the pre-stored image (i.e., the reference image or the simulated image obtained by the previous scan). Figure 7 The horizontal axis (X axis) represents the pixel points of the current scanned image, in units of , Figure 6 and Figure 7 The ordinate (Y-axis) represents the voltage value of the corresponding output of the pixel point, in millivolts (mV). Figure 6 is a pre-stored image (i.e., a reference image or a simulated image obtained by a previous scan), in which area B is the manifestation of the crack in the scanned image. Figure 6 The width of the crack and its position relative to the contact image sensor device 10 can be seen in FIG. Figure 7 The current scanned image is obtained by scanning the wall and crack at the position to be detected by the contact image sensor device 10, and the comparison is Figure 6 and Figure 7From the image in FIG. 1 , it can be seen that there is a clear difference in area A, and the waveform change in this area may be caused by stains adhered to the light-transmitting plate 14 of the contact image sensor device 10. Based on this, it can be inferred that there may be stains on the light-transmitting plate.

[0074] Furthermore, in the first cleaning method, the cleaning method further includes a step of determining whether the number of cycles N of step S10 is greater than or equal to 3, and if so, executing the alarm step S40, and if not, continuing to execute step S10.

[0075] Next, the cleaning method for cleaning the contact image sensor device 10 of the present invention is described in conjunction with the flow chart. Specifically, as shown in FIG5 , first, the control device 40 issues an instruction to start the cleaning device 20, the first driving part 21 drives the first transmission part 23, and the first transmission part 23 drives the cleaning component 22 to clean the light-transmitting plate 14 of the contact image sensor device 10. After completion, a cleaning completion signal (i.e., a cleaning completion step, referred to as a "cleaning step") is issued.

[0076] Next, the scanning step S20 is performed. Specifically, after receiving the cleaning completion signal, the control device 40 starts the contact image sensor device 10 to scan the wall surface 50 and the crack 60. After the scanned image is obtained, it is transmitted to the control device 40 through the transmission system.

[0077] Next, the control device 40 compares the current scanned image with the pre-stored image (reference image or previous scanned image), thereby completing the image comparison step S30.

[0078] After the image comparison step S30 is completed, by comparing the waveform of the currently scanned image with the pre-stored image, the cleaning method further includes a judgment step S35 of judging whether there is dust on the surface of the light-transmitting plate 14. The judgment rule is: if the waveform of the currently scanned image is substantially consistent with the waveform of the pre-stored image, it is judged that there is no dust on the surface of the light-transmitting plate 14; if the waveform of the currently scanned image is inconsistent with the waveform of the pre-stored image, it is judged that there is dust on the surface of the light-transmitting plate 14.

[0079] When there is no dust on the surface of the light-transmitting plate 14, the contact image sensor device 10 saves the current image, and then analyzes and processes the saved current image.

[0080] When there is dust on the surface of the light-transmitting plate 14, the cleaning device 20 is restarted, and the above-mentioned cleaning step, scanning step S20, image comparison step S30 and judgment step S35 are repeated in sequence.

[0081] If it is determined again that there is dust on the surface of the light-transmitting plate 14, the above cleaning step, scanning step S20, image comparison step S30 and judgment step S35 are repeated. After N times, when N is greater than or equal to 3 times, the control device 40 executes the alarm step, the system issues an alarm, and manual intervention is performed. The operator can determine whether to continue the next round of cleaning or conduct on-site inspection and cleaning according to the situation.

[0082] In addition to the above cleaning methods, use Figure 1 and Figure 2 The contact image sensor device 10 can also perform another cleaning method. The specific control flow chart is shown in FIG. Figure 8 .

[0083] Specifically, Figure 8 As shown, the second cleaning method for cleaning the contact image sensor device 10 is described in detail below.

[0084] First, the scanning step S20 is performed. Specifically, after receiving the cleaning completion signal, the control device 40 starts the contact image sensor device 10 to scan the wall surface 50 and the crack 60 to obtain the current scan image. After the scan image is obtained, it is transmitted to the control device 40 through the transmission system.

[0085] Next, the control device 40 is used to compare the current scanned image with the pre-stored image (reference image or previous scanned image), thereby completing the image comparison step S30.

[0086] After the image comparison step S30 is completed, by comparing the waveform of the currently scanned image with the pre-stored image, a judgment step S35 is performed to judge whether there is dust on the surface of the light-transmitting plate 14. The judgment rule is: if the waveform of the currently scanned image is substantially consistent with the waveform of the pre-stored image, it is judged that there is no dust on the surface of the light-transmitting plate 14; if the waveform of the currently scanned image is inconsistent with the waveform of the pre-stored image, it is judged that there is dust on the surface of the light-transmitting plate 14.

[0087] When there is no dust on the surface of the light-transmitting plate 14, the contact image sensor device 10 saves the current image, and then analyzes and processes the saved current image.

[0088] When there is dust on the surface of the light-transmitting plate 14, the cleaning device 20 is started to perform the above cleaning step, and then the above scanning step S20, image comparison step S30 and judgment step S35 are repeated in sequence.

[0089] If it is determined again that there is dust on the surface of the light-transmitting plate 14, the above cleaning step, scanning step S20, image comparison step S30 and judgment step S35 are repeated. After N times, that is, N is greater than or equal to 3, the control device 40 executes the alarm step, the system issues an alarm, and manual intervention is performed. The operator can determine whether to continue the next round of cleaning or conduct on-site inspection and cleaning according to the situation.

[0090] The first cleaning method is to first perform the cleaning step and then perform the scanning step S20 regardless of whether there is dust on the surface of the light-transmitting plate 14. The second cleaning method is to first perform the scanning step S20 and then perform the judgment step S35 to determine whether to perform the cleaning step according to the judgment result. The advantage of the second cleaning method is that when there is no dust on the light-transmitting plate 14, the scanning step S20 can be directly entered, which simplifies the steps and saves time.

[0091] Embodiment 2

[0092] Figure 3 and Figure 4 The schematic diagram of the structure of the second embodiment of the crack change monitoring device of the present invention is shown.

[0093] like Figure 4 As shown, in the second embodiment of the present invention, the crack change monitoring device 1 further includes a reference sample 18 , and the reference sample 18 is movably arranged relative to the light-transmitting plate 14 .

[0094] According to the above configuration, the reference sample 18 can be moved between the light-transmitting plate 14 and the wall 50, so that the contact image sensor device 10 can scan the reference sample 18. When the light-transmitting plate 14 needs to be cleaned or the contact image sensor device 10 needs to scan the crack 60, the reference sample 18 can be moved to other positions, so that the cleaning component 22 can clean the light-transmitting plate 14 or the contact image sensor device 10 can scan the crack 60.

[0095] It should be noted that the reference sample 18 is generally made of a single-color (usually white) opaque material, which may be paper or other materials.

[0096] like Figure 3 and Figure 4 As shown, in the second embodiment of the present invention, the crack change monitoring device further includes a second driving part 31, a second transmission part 32 and a placement plate 33. The second driving part 31 is located in the box; the second transmission part 32 is located in the box, and the second transmission part 32 is connected to the second driving part 31; the placement plate 33 is located in the box, and is connected to the second transmission part 32; the reference sample 18 is arranged at the placement plate 33, and under the driving action of the second driving part 31, the second transmission part 32 drives the placement plate 33 to move linearly.

[0097] According to the above arrangement, since the reference sample 18 is arranged at the placement plate 33, the reference sample 18 can follow the placement plate 33 to move linearly relative to the light-transmitting plate 14. In this way, when the contact image sensor device 10 needs to scan the reference sample 18, the reference sample 18 can be moved to the position to be scanned between the light-transmitting plate 14 and the wall surface 50. When the light-transmitting plate 14 of the contact image sensor device 10 needs to be cleaned or the contact image sensor device 10 needs to scan the crack 60, the second driving unit 31 can be used to drive the reference sample 18 to move to other positions in time, which is convenient for cleaning the light-transmitting plate 14 and scanning the crack 60, thereby ensuring the normal scanning and cleaning of the contact image sensor device 10.

[0098] like Figure 3 As shown, in the second embodiment of the present invention, the second transmission part 32 includes a second driving wheel 321, a second driven wheel 322, a first conveyor belt 323, a third driven wheel 324 and a second conveyor belt 325. The second driving wheel 321 is connected to the second driving part 31; the second driven wheel 322 is spaced apart from the second driving wheel 321; the first conveyor belt 323 is sleeved on the outer periphery of the second driving wheel 321 and the second driven wheel 322; the third driven wheel 324 is spaced apart from the second driven wheel 322; the second conveyor belt 325 is arranged on the outer periphery of the second driven wheel 322 and the third driven wheel 324, the extension direction of the first conveyor belt 323 is perpendicular to the extension direction of the second conveyor belt 325, and the placement plate 33 is connected to the second conveyor belt 325.

[0099] According to the above arrangement, the second driving wheel 321 drives the second driven wheel 322 through the first conveyor belt 323, and the second driven wheel 322 can drive the second conveyor belt 325 to reciprocate between the second driven wheel 322 and the third driven wheel 324. Since the placement plate 33 is connected to the second conveyor belt 325, the reference sample 18 is placed in the placement plate 33. In this way, the second conveyor belt 325 can drive the reference sample 18 to move up and down relative to the light-transmitting plate 14 (that is, the reference sample 18 is moved up and down according to the light-transmitting plate 14). Figure 4 ), thereby ensuring the normal scanning and cleaning work of the contact image sensor device 10.

[0100] Specifically, the second driving part 31 is fixed in the housing of the crack change monitoring device, and the second driving part 31 also includes a driving shaft. The second driving wheel 321 is sleeved on the outer circumference of the driving shaft, and the driving shaft can drive the second driving wheel 321 to rotate together. The second transmission part 32 also includes two driven shafts arranged at intervals, the second driven wheel 322 is sleeved on the outer circumference of one of the driven shafts, and the third driven wheel 324 is sleeved on the outer circumference of the other driven shaft. The second driven wheel 322 and the third driven wheel 324 can rotate relative to their respective matched driven shafts, and the driven shafts are fixed in the housing of the crack change monitoring device. The first conveyor belt 323 is sleeved on the outer circumference of the second driving wheel 321 and the second driven wheel 322, the second conveyor belt 325 is arranged on the outer circumference of the second driven wheel 322 and the third driven wheel 324, and the placement plate 33 is detachably connected (threaded or clamped) to the second conveyor belt 325. The driving shaft can drive the second driving wheel 321 to rotate, and the second driving wheel 321 drives the second driven wheel 322 through the first conveyor belt 323, and the second driven wheel 322 can drive the second conveyor belt 325 to reciprocate between the second driven wheel 322 and the third driven wheel 324. In this way, the second conveyor belt 325 can drive the reference sample 18 to move up and down relative to the light-transmitting plate 14, thereby ensuring the normal scanning and cleaning work of the contact image sensor device 10.

[0101] It should be noted that the extension direction of the first conveyor belt 323 is perpendicular to the extension direction of the second conveyor belt 325, which means that the angle between the extension direction of the first conveyor belt 323 and the extension direction of the second conveyor belt 325 includes but is not limited to 90°. In actual work, a certain angle deviation is allowed, and the angle between the extension direction of the first conveyor belt 323 and the extension direction of the second conveyor belt 325 is set in the range of 85° to 95°.

[0102] like Figure 4 As shown, in the second embodiment of the present invention, the crack change monitoring device further includes a storage box 34 located in the box body, and the storage box 34 is used to store the reference sample 18.

[0103] In the above arrangement, when the contact image sensor device 10 needs to scan the reference sample 18, the reference sample 18 is removed from the storage box 34. Normally, the reference sample 18 is stored in the storage box 34. In this way, the storage box 34 can prevent the reference sample 18 from being completely exposed to the air, and can effectively prevent the reference sample 18 from being contaminated with foreign matter and affecting its imaging quality, thereby reducing the replacement frequency of the reference sample 18, extending the service life of the reference sample 18, and further reducing the use cost of the reference sample 18.

[0104] Specifically, the storage box 34 is made of plates, one end of which is open and a cavity is formed inside. The cavity is used to place the reference sample 18, and the opening facilitates the reference sample 18 to be stored in the storage box 34 or removed from the storage box 34. The storage box 34 is fixed in the box of the crack change monitoring device.

[0105] like Figure 4 As shown, in the second embodiment of the present invention, the first driving unit 21 and the second driving unit 31 share a control device 40, so that the control device 40 can control the start and stop of the first driving unit 21 and the second driving unit 31 respectively, thereby reducing the control cost, simplifying the control procedure, reducing the size of the control device 40, and saving the installation space of the control device 40.

[0106] In summary, it can be seen that the difference between the second embodiment and the first embodiment is that in the second embodiment, a reference sample 18, a second driving unit 31 and a second transmission unit 32 for driving the reference sample 18 to move, and a storage box 34 for storing the reference sample 18 are added. In addition, in the second embodiment, the first driving unit 21 and the second driving unit 31 share a control device 40.

[0107] The structure of the contact image sensor device 10 in the second embodiment is the same as that of the contact image sensor device 10 in the first embodiment, and will not be described again.

[0108] Based on the crack change monitoring device in the second embodiment, Fig. 9 As shown, the present invention further provides a third cleaning method for cleaning according to the crack change monitoring device. The third cleaning method includes step S10 of cleaning the surface of the light-transmitting plate 14 by using the cleaning component 22 of the cleaning device 20 .

[0109] According to the above step S10, the cleaning assembly 22 can remove foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected, thereby avoiding the situation where the contact image sensor device 10 cannot correctly scan the object to be detected due to foreign matter on the surface of the light-transmitting plate 14 facing the position to be detected, thereby ensuring the scanning accuracy of the contact image sensor device 10 and the quality of the scanned image.

[0110] Cleaning method three also includes the following steps: Step S05: moving the reference sample 18 to the light-transmitting plate 14 so that the reference sample 18 covers the light-transmitting plate 14; Step S06: scanning the reference sample 18 to obtain the current sample image, and comparing the current sample image with the pre-stored reference sample image; Step S08: determining whether there is dust on the light-transmitting plate 14, if yes, executing step S10; if not, executing the step of using the contact image sensor device 10 to scan the wall 50 and the crack 60 at the position to be detected.

[0111] When the number of times step S10 is repeated is N times, and N≥3, the cleaning method further includes an alarm step S40.

[0112] Before step S05 , the cleaning method further includes step S20 of scanning the wall surface 50 and the crack 60 at the position to be detected by using the contact image sensor device 10 to obtain a current scan image and step S30 of comparing the current scan image with a pre-stored image.

[0113] After step S30, the cleaning method further includes a step of judging whether there is dust on the light-transmitting plate 14. If not, a step of saving the current scanned image is executed; if yes, step S05 is executed.

[0114] Fig. 9 Shows the use of Figure 3 A flow chart of a third cleaning method for cleaning a crack change monitoring device.

[0115] Specifically, first, the scanning step S20 is performed. Specifically, after receiving the cleaning completion signal, the control device 40 starts the contact image sensor device 10 to scan the wall surface 50 and the crack 60. After the scanned image is obtained, it is transmitted to the control device 40 through the transmission system.

[0116] Next, the control device 40 is used to compare the current scanned image with the pre-stored image (reference image or previous scanned image), thereby completing the image comparison step S30.

[0117] After the image comparison step S30 is completed, by comparing the waveform of the currently scanned image with the pre-stored image, a judgment step S35 is performed to judge whether there is dust on the surface of the light-transmitting plate 14. The judgment rule is: if the waveform of the currently scanned image is substantially consistent with the waveform of the pre-stored image, it is judged that there is no dust on the surface of the light-transmitting plate 14; if the waveform of the currently scanned image is inconsistent with the waveform of the pre-stored image, it is judged that there is dust on the surface of the light-transmitting plate 14.

[0118] When there is no dust on the surface of the light-transmitting plate 14, the contact image sensor device 10 saves the current image, and then analyzes and processes the saved current image.

[0119] When there is dust on the surface of the light-transmitting plate 14 , the step S05 of feeding the reference sample 18 is executed, and the control device 40 starts the reference sample 18 and covers it on the light-transmitting plate 14 of the contact image sensor device 10 .

[0120] Then, a step of scanning the reference sample 18 (this step is referred to as a “step of scanning the reference sample 18 ”) is performed in which the contact image sensor device 10 scans the reference sample 18 .

[0121] After the scanned image is obtained, it is transmitted to the control device 40 through the transmission system. The control device 40 compares the currently scanned image with the pre-stored image (reference image or previous scanned image) (this step is called "reference sample 18 image comparison step").

[0122] After the image comparison step of the reference sample 18 is completed, the determination step of the reference sample 18 is executed to determine whether there is dust on the surface of the light-transmitting plate 14 by comparing the waveform of the currently scanned image with the waveform of the pre-stored image (determination step S08). Figure 1 If the waveform diagram of the currently scanned image is inconsistent with the waveform diagram of the pre-stored image, it is determined that there is dust on the surface of the light-transmitting plate 14. ...

[0123] When it is determined that there is no dust on the surface of the light-transmitting plate 14, the control device 40 removes the reference sample 18 from the surface of the light-transmitting plate 14 and puts it back into the storage box 34. After that, the contact image sensor device 10 scans the wall surface 50 and the crack 60. Then, the contact image sensor device 10 saves the current image, and then analyzes and processes the saved current image.

[0124] When it is determined that there is dust on the surface of the light-transmitting plate 14, the control device 40 starts the cleaning device 20 to clean the surface of the light-transmitting plate 14 in a cleaning step S10. Before performing the cleaning step S10, ensure that the reference sample 18 has been removed from the surface of the light-transmitting plate 14.

[0125] After the cleaning step S10 is completed, the scanning of the reference sample 18, the image comparison of the reference sample 18 and the judgment step S08 are repeated. When it is determined again that there is dust on the surface of the light-transmitting plate 14, the cleaning step S10, the scanning of the reference sample 18, the image comparison of the reference sample 18 and the judgment step S08 are repeated. After N times of repetition, when N is greater than or equal to 3 times, the control device 40 executes the alarm step, the system issues an alarm, and manual intervention is performed. The operator can determine whether to continue the next round of cleaning or conduct on-site inspection and cleaning according to the situation. Fig.13 As shown, the fourth cleaning method for cleaning based on the crack change monitoring device is explained in detail below.

[0126] First, the step S05 of feeding the reference sample 18 is performed. Specifically, the control device 40 starts the reference sample 18, moves the reference sample 18 to the light-transmitting plate 14, and covers the reference sample 18 on the light-transmitting plate 14 of the contact image sensor device 10.

[0127] Next, the contact image sensor device 10 scans the reference sample 18 to obtain the current sample image (this step is referred to as "the step of scanning the reference sample 18").

[0128] After the scanned image is obtained, it is transmitted to the control device 40 through a transmission system (wired or wireless). The control device 40 compares the currently scanned image with a pre-stored image (reference image or previous scanned image) (this step is called "reference sample 18 image comparison step").

[0129] After the image comparison step of the reference sample 18 is completed, the judgment step S08 of the reference sample 18 is executed to judge whether there is dust on the surface of the light-transmitting plate 14 by comparing the waveform of the currently scanned image with the waveform of the pre-stored image. Judgment rule: The waveform of the currently scanned image and the pre-stored image Figure 1 If the waveform diagram of the currently scanned image is inconsistent with the waveform diagram of the pre-stored image, it is determined that there is dust on the surface of the light-transmitting plate 14. ...

[0130] When it is determined that there is no dust on the surface of the light-transmitting plate 14, the reference sample 18 is removed from the surface of the light-transmitting plate 14 and returned to the storage box 34. The contact image sensor device 10 scans the wall surface 50 and the crack 60. Then, the contact image sensor device 10 saves the current image, and then analyzes and processes the saved current image.

[0131] When it is determined that there is dust on the surface of the light-transmitting plate 14, the control device 40 starts the cleaning device 20 to clean the surface of the light-transmitting plate 14 in a cleaning step S10. Before performing the cleaning step S10, ensure that the reference sample 18 has been removed from the surface of the light-transmitting plate 14.

[0132] After the cleaning step S10 is completed, the scanning of the reference sample 18, the image comparison of the reference sample 18, and the determination step S08 of the reference sample 18 are repeated. When it is determined again that there is dust on the surface of the light-transmitting plate 14, the cleaning step S10, the scanning of the reference sample 18, the image comparison of the reference sample 18, and the determination step S08 of the reference sample 18 are repeated. After N times of repetition, when N is greater than or equal to 3 times, the control device 40 executes the alarm step, the system issues an alarm, and manual intervention is performed. The operator can determine whether to continue the next round of cleaning or conduct on-site inspection and cleaning according to the situation.

[0133] It should be noted that Fig.10 The horizontal axis (X axis) represents the pixel points of the standard scanned image, in units of , Fig.11 The horizontal axis (X axis) represents the pixel points in the current scanned image, in units of , Fig.10 and Fig.11The ordinate (Y-axis) represents the output voltage value corresponding to each pixel point, and the unit is millivolt (mV). Although the reference sample 18 is usually placed in the storage box 34, it can effectively prevent the reference sample 18 from being stained. However, when the reference sample 18 is moved out of the storage box 34, the reference sample 18 may be stained. Therefore, it is necessary to further determine whether the stain is stained on the reference sample 18. To this end, in an alternative embodiment not shown in the drawings of the present invention, a corresponding judgment step can be set. When the above detection result determines that there is a stain, the control device 40 can drive the reference sample 18 along Figure 3 The X-axis direction (the linear arrangement direction of the photoelectric conversion chip) shown in the figure moves a certain distance. Normally, the moving distance only needs to be larger than the size of a pixel of the photoelectric conversion chip (IC). For example, for a 100DPI IC, each pixel is 0.25mm. However, in order to make the effect more obvious, it is generally moved more than 1mm. If Fig.11 If the C portion in the image has also moved accordingly, it is determined that the stain is on the reference sample 18 and needs to be replaced manually. If the C portion has not moved, it is determined that the stain is on the light-transmitting plate 14. Of course, it is also possible to Figure 3 The reference sample 18 is driven in the Y-axis direction as shown, and the moving distance can be determined according to the actual situation, and the edge of the reference sample 18 should be ensured to be within the scanning range of the contact image sensor device 10. Since the distribution direction of the above-mentioned stains cannot be determined, it can be firstly moved along Figure 3 The reference sample 18 is driven to move a certain distance in the X-axis direction as shown, and then the reference sample 18 is driven to move a certain distance in the Y-axis direction.

[0134] In addition, it is possible to determine whether the reference sample 18 has stains based on the output voltage curve of each pixel of the photoelectric conversion chip 13. Fig.12 As shown, the horizontal axis (X-axis) represents the pixel points of the standard scanned image, in units, and the vertical axis (Y-axis) represents the output voltage value corresponding to each pixel point, in millivolts (mV). D is the bright output of the contact image sensor device 10, that is, the output voltage curve of each pixel point of the photoelectric conversion chip when the light source is on, and E is the dark output of the contact image sensor device 10, that is, the output voltage curve of each pixel point of the photoelectric conversion chip 13 when the light source is not on. VEp(n) is the difference between the bright output and the dark output of the nth point. VEp(n+1) is the difference between the bright output and the dark output of the n+1th point, that is, the adjacent point. In general, the following formula is used to determine whether there is stain.

[0135] U=|(VE p (n+1)-VE p (n)) / VE p (n)|×100%

[0136] If U ≥ 25%, it can be judged that there is stain.

[0137] Of course, the value of 25% is not fixed and can be determined based on actual conditions.

[0138] Fig. 9 and Fig.13 The difference between the cleaning methods is: Fig. 9 exist Fig.13 On the basis of Figure 8 The scanning step S20, the image comparison step S30, and the judgment step S35 in the cleaning method. In the actual operation process, different cleaning methods can be selected according to actual needs.

[0139] From the above description, it can be seen that the above embodiment of the present invention achieves the following technical effects: the first driving unit can drive the first driving wheel to rotate, thereby driving the belt to reciprocate between the first driving wheel and the first driven wheel, and since the cleaning component is fixed on the belt, the belt drives the cleaning component to move relative to the light-transmitting plate, so that foreign matter on the surface of the light-transmitting plate facing the position to be detected can be removed. This avoids the situation where the contact image sensor device cannot correctly scan the object to be detected due to foreign matter contaminated on the surface of the light-transmitting plate facing the position to be detected, thereby ensuring the scanning accuracy of the contact image sensor device and the quality of the scanned image.

[0140] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0141] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0142] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0143] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crack change monitoring device, characterized in that: The crack change monitoring device comprises: A box body, wherein the box body has a detection surface, and the detection surface is arranged at a position to be detected; A contact image sensor device is located in the housing; wherein the contact image sensor device (10) comprises: Frame (11); A light-transmitting plate (14) connected to the frame (11) to form a receiving cavity; A light source (12) is located in the accommodating cavity, and the light source (12) is used to illuminate the wall surface (50) and the crack (60) at the position to be detected; an optical lens (17) located in the accommodating cavity, wherein at least one light source (12) is disposed on the periphery of the optical lens (17); a photoelectric conversion chip (13), arranged corresponding to the optical lens (17), the photoelectric conversion chip (13) being used to convert the optical signal emitted by the optical lens (17) into an electrical signal; A cleaning device (20), comprising a first driving part (21) and a cleaning assembly (22) connected to the first driving part (21), wherein under the driving action of the first driving part (21), the cleaning assembly (22) moves relative to the light-transmitting plate (14), thereby being able to remove foreign matter located on the surface of the light-transmitting plate (14) facing the position to be detected; The crack change monitoring device further comprises a reference sample (18), wherein the reference sample (18) is movably arranged relative to the light-transmitting plate (14); the crack change monitoring device further comprises: A second driving part (31), located in the housing; A second transmission part (32) is located in the box body, and the second transmission part (32) is connected to the second driving part (31); A placement plate (33) is located in the box body and connected to the second transmission part (32); the reference sample (18) is arranged on the placement plate (33); under the driving action of the second driving part (31), the second transmission part (32) drives the placement plate (33) to move linearly; when the contact image sensor device (10) needs to scan the reference sample (18), the reference sample (18) can be moved to a position to be scanned between the light-transmitting plate (14) and the wall (50); when the light-transmitting plate (14) of the contact image sensor device (10) needs to be cleaned or the contact image sensor device (10) needs to scan a crack (60), the reference sample (18) can be moved to other positions.

2. The crack change monitoring device according to claim 1, characterized in that: The cleaning component (22) further comprises a first transmission part (23), the cleaning component (22) and the first driving part (21) are both connected to the first transmission part (23), and the cleaning component (22) is movably arranged relative to the light-transmitting plate (14).

3. The crack change monitoring device according to claim 2, characterized in that: The first transmission part (23) comprises: A first driving wheel (231), connected to the first driving part (21); A first driven wheel (232); A belt (233) is sleeved on the outer circumference of the first driving wheel (231) and the first driven wheel (232), and the cleaning component (22) is connected to the belt (233); Alternatively, the first transmission part (23) comprises: A driving gear connected to the first driving part (21); Driven gear; The driving gear and the driven gear are both meshed with the chain, and the cleaning component (22) is connected to the chain.

4. The crack change monitoring device according to any one of claims 1 to 3, characterized in that: The cleaning component (22) comprises: A substrate (221) connected to the first driving unit (21); A cleaning member (222) is connected to the substrate (221).

5. The crack change monitoring device according to claim 1, characterized in that: The second transmission part (32) comprises: A second driving wheel (321) connected to the second driving part (31); A second driven wheel (322) is spaced apart from the second driving wheel (321); A first conveyor belt (323) is sleeved on the outer circumference of the second driving wheel (321) and the second driven wheel (322); a third driven wheel (324) arranged at a distance from the second driven wheel (322); The second conveyor belt (325) is arranged on the outer periphery of the second driven wheel (322) and the third driven wheel (324); the extension direction of the first conveyor belt (323) is perpendicular to the extension direction of the second conveyor belt (325); and the placement plate (33) is connected to the second conveyor belt (325).

6. The crack change monitoring device according to claim 1, characterized in that: The crack change monitoring device also includes a storage box (34) located in the box body, and the storage box (34) is used to store the reference sample (18).

7. The crack change monitoring device according to claim 1, characterized in that: The crack change monitoring device further comprises a control device (40), and the control device (40) is connected to the first driving part (21) wirelessly or by wire.

8. The crack change monitoring device according to claim 1, characterized in that: The cleaning assembly (22) further comprises a first transmission part (23), wherein a first driving wheel (231) and a first driven wheel (232) of the first transmission part (23) are both connected to the box body.

9. A cleaning method for cleaning a contact image sensor device of a crack change monitoring device according to any one of claims 1 to 4, characterized in that: The cleaning method comprises the following step S10 of cleaning the surface of the light-transmitting plate (14) by using the cleaning component (22) of the cleaning device (20).

10. The cleaning method according to claim 9, characterized in that: The cleaning method further comprises a step S20 of scanning the wall surface (50) and the crack (60) at the position to be detected using the contact image sensor device (10) to obtain a current scan image and a step S30 of comparing the current scan image with a pre-stored image.

11. The cleaning method according to claim 10, characterized in that: After step S30, the cleaning method further comprises a step S35 of judging whether there is dust on the surface of the light-transmitting plate (14); if not, the step of saving the current scanned image is performed; if yes, the step S10 is repeated.

12. The cleaning method according to claim 11, characterized in that: After the judging step S35, the cleaning method further comprises the step of judging whether the number of cycles N of the step S10 is greater than or equal to 3, if yes, executing the alarm step S40, if not, continuing to execute the step S10.

13. A method for cleaning a crack change monitoring device according to any one of claims 1 to 8, characterized in that: The cleaning method comprises a step S10 of cleaning the surface of the light-transmitting plate (14) by using a cleaning component (22) of the cleaning device (20).

14. The cleaning method according to claim 13, characterized in that: The cleaning method further comprises the following steps: Step S05: moving the reference sample (18) to the light-transmitting plate (14) so ​​that the reference sample (18) covers the light-transmitting plate (14); Step S06: scanning the reference sample (18) to obtain a current sample image, and comparing the current sample image with a pre-stored reference sample image; Step S08: determining whether there is dust on the light-transmitting plate (14); if so, executing step S10; if not, executing the step of using the contact image sensor device (10) to scan the wall surface (50) and the crack (60) at the position to be detected.

15. The cleaning method according to claim 14, characterized in that: When the number of times the step S10 is repeated is N times, and N≥3, the cleaning method further includes an alarm step S40.

16. The cleaning method according to claim 14, characterized in that: Before step S05, the cleaning method further comprises step S20 of scanning the wall surface (50) and the crack (60) at the position to be detected using the contact image sensor device (10) to obtain a current scanned image and step S30 of comparing the current scanned image with a pre-stored image.

17. The cleaning method according to claim 16, characterized in that: After step S30, the cleaning method further comprises a step of judging whether there is dust on the light-transmitting plate (14), and if not, executing a step of saving the current scanned image; If yes, then execute step S05.

Images