CN216621028U - Crack width measuring instrument - Google Patents
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- CN216621028U CN216621028U CN202123436692.9U CN202123436692U CN216621028U CN 216621028 U CN216621028 U CN 216621028U CN 202123436692 U CN202123436692 U CN 202123436692U CN 216621028 U CN216621028 U CN 216621028U
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Abstract
The application relates to a crack width measuring instrument, which comprises a detection part and a handheld part, wherein an image collector is arranged on the detection part, and a display is arranged on the handheld part. The crack width measuring instrument further comprises a detection triggering unit, an image acquisition control unit, an image storage unit and an image processing unit. The detection trigger unit outputs a trigger signal by detecting the displacement of the detection part; the image acquisition control unit can receive and respond to the trigger signal to continuously shoot the image of the crack to be detected and output image data; the image data is transmitted to the image processing unit or is stored in the image storage unit; the image processing unit performs image recognition processing and image width sorting on the image data to output a maximum crack width value. This application is through the detection trigger unit of crack width measuring apparatu and the reasonable combination of image acquisition control unit for crack width measuring apparatu absorbs the crack's that awaits measuring data in succession, has labour saving and time saving's effect.
Description
Technical Field
The application relates to the field of width measuring instruments, in particular to a crack temperature measuring instrument.
Background
In concrete structure house detection, bridge structure detection and pavement structure detection, crack detection is an important detection content, and firstly, crack control level and the limit value (mm) of the maximum width of a structural member are determined in the checking calculation of the normal use limit state of the concrete structure design specification; secondly, the width and the distribution condition of the cracks of the concrete member in the industrial building reliability identification standards, the civil building reliability identification standards, the dangerous house identification standards and other various house detection specifications are also important indexes for evaluating the safety level of the member; in addition, the concrete requirements of crack detection are explained in the specifications of building deformation measurement specification, house crack detection and processing technical regulation and the like in detail, and the crack distribution position, the trend, the length, the width and the change condition of the crack on the building are measured in crack observation.
The requirements of the crack width limit value of the concrete member are clear in the specifications, and the crack width value is the important factor in crack detection. In measuring the width of a crack, one often uses a crack width test instrument.
In the related technology, the crack width gauge comprises an image collector and a handheld display, wherein the image collector is in data connection with the handheld display. The image collector is set as an industrial camera, the display is provided with a graduated scale, the image collector collects and transmits the picture to the display, and a user can read the width of the crack by naked eyes according to the graduated scale on the display.
In the process of detecting the crack by using the crack width measuring instrument, the inventor finds that the image collector needs to be close to the position of the crack one by one for image collection, and after the image collection is completed, a user observes the crack by naked eyes through scales on the display screen. In the crack observation process, the inventor finds that the crack is irregular in trend during detection due to the fact that the length of some cracks is long, the maximum width of the crack is difficult to select by naked eyes for measurement, when the number of the cracks is large, a user needs to shoot repeatedly to obtain a more accurate crack width value, and the detection process consumes time and labor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that the width of people's crack on the detection wall body is comparatively consuming time and wasting force, this application provides a crack width measuring apparatu, through the cooperation of detection trigger unit, image acquisition control unit and image data processing unit on crack width measuring apparatu's the detection portion, realizes that crack width measuring apparatu obtains the image data of crack that awaits measuring in succession, saves the step of repeated uptake crack image data for testing process labour saving and time saving.
The application provides a crack width measuring instrument adopts following technical scheme:
the utility model provides a crack width measuring apparatu, includes detection portion and handheld portion, is equipped with image collector on the detection portion, is equipped with the display in the handheld portion, still includes:
the detection trigger unit is used for detecting the moving distance of the detection part and outputting a trigger signal;
the image acquisition control unit is in signal connection with the detection trigger unit, receives and responds to the trigger signal to capture and output image data of the crack to be detected;
the image storage unit is in data connection with the image acquisition control unit and used for acquiring and storing image data;
the image processing unit is in data connection with the image acquisition control unit and/or the image data storage unit, comprises an image identification module and a width sorting module, receives the image data, identifies the image data by the image identification module and outputs the width data of the crack to be detected, and the width sorting module receives the width data and sorts the width data to output the maximum width data.
By adopting the technical scheme, when the crack width measuring instrument slides on the crack to be measured, the detection trigger unit detects the displacement of the detection part, and when the displacement of the detection part reaches a set value, a trigger signal is output, so that the arrangement realizes continuous acquisition of the image of the crack to be measured by measuring the displacement of the detection part; the image acquisition control unit responds to the trigger signal output by the detection trigger unit, captures an image of the crack to be detected and outputs image data. The detection trigger unit and the image acquisition control unit are matched to enable the crack image acquisition to continuously acquire the image of the crack to be detected, so that the action of repeatedly taking the image of the crack to be detected by a large amount of manpower is omitted, and time and labor are saved. Through making reasonable combination with current image memory cell and image processing unit for image data saves memory cell earlier then carries to image processing unit, perhaps image data directly carries to image processing unit, has improved the speed of image data processing, effectively avoids losing of image data when crack width measuring apparatu crashes simultaneously.
Preferably, the detection part comprises a box body, and the image collector is arranged at the bottom of the box body;
the image collector is configured as a CCD camera;
the bottom of the box body is oppositely provided with two supporting blocks, the CCD camera is arranged between the two supporting blocks, and the end faces of the supporting blocks, far away from the box body, are higher than the plane where the lens of the CCD camera is located.
Through adopting above-mentioned technical scheme, CCD camera and supporting shoe set up in the bottom of the box body of detection portion, and the both sides of CCD camera are located to the supporting shoe, and when detection portion slided on the crack that awaits measuring, the supporting shoe avoided CCD camera and the crack place plane direct contact that awaits measuring for CCD camera place plane is on a parallel with crack place plane always. The supporting block drives the CCD camera to continuously displace on the crack so as to continuously shoot the crack image, so that the action that the crack image needs to be shot one by one when a user shoots the crack to be measured is omitted, and the use of the crack width measuring instrument is more time-saving and labor-saving.
Preferably, the supporting block is rotatably provided with a roller, and the roller is provided with a through hole or a notch;
the detection trigger unit is configured as an infrared correlation sensor, and the transmitting end and the receiving end of the infrared correlation sensor are respectively arranged on the box body and positioned on two sides of the roller.
When the roller rotates to a set angle, infrared rays emitted by the emitting end of the infrared correlation sensor penetrate through the through hole or the notch to enter the receiving end, and a trigger signal is output.
Through adopting above-mentioned technical scheme, both the infrared emission end and the infrared receiving terminal of infrared correlation sensor cooperate with the through-hole on the gyro wheel, and when the gyro wheel rotated to the settlement angle, the infrared ray that the infrared emission end launched penetrated through the through-hole on the gyro wheel, and the infrared receiving terminal received the infrared ray and exported trigger signal. The transmitting terminal of infrared ray correlation sensor matches the rotation number of turns that detects the gyro wheel and then obtains the displacement volume of detecting part with the receiving terminal, and a trigger signal is exported to the receiving terminal, and trigger signal is received by the CCD camera and is responded, realizes awaiting measuring the continuous shooting of crack image, and the user only needs control detecting part to last to slide on the crack that awaits measuring and can shoot continuous crack image, more labour saving and time saving.
Preferably, the supporting block is rotatably provided with a roller, and the side wall of the roller is provided with a lug;
the detection trigger unit is configured as an infrared distance measuring sensor which is arranged on the box body and is positioned on one side of the roller with the convex block;
when the roller rotates to a set angle, infrared rays emitted by the emitting end of the infrared distance measuring sensor are projected to the bump and reflected to enter the receiving end, and a trigger signal is output.
Through adopting above-mentioned technical scheme, roll to the settlement angle when the gyro wheel, the infrared ray of infrared distance measuring sensor's transmitting terminal transmission shines the lug and reflects and is received by the receiving terminal, because the upper surface of lug is higher than the gyro wheel lateral wall, infrared distance measuring sensor surveys data and is less than the setting value, when the receiving terminal receives the less measured value of settlement, receiving terminal output trigger signal, trigger signal is received by the CCD camera and responds, realize the continuous shooting of the crack image that awaits measuring, the user only needs the control detection portion to last to slide on the crack that awaits measuring and can shoot continuous crack image, more labour saving and time saving.
Preferably, the roller is provided with an anti-slip groove or an anti-slip film.
Through adopting above-mentioned technical scheme, the roughness of the wheel face of antiskid groove and slipmembrane increase gyro wheel, and then the wheel face that increases the gyro wheel and the frictional force on wall or road surface that the crack that awaits measuring is located, when the gyro wheel slides at wall or road surface, avoid the gyro wheel to skid, influence displacement's survey, and then improve the accuracy nature of CCD camera collection image.
Preferably, the anti-shake parts are arranged on two sides of the box body close to the roller;
the anti-shake piece is the shell fragment that C font set up, and the one end fixed connection in the inside wall of box body that the gyro wheel was kept away from to the shell fragment, the gyro wheel is located the inside wall middle part of shell fragment.
Through adopting above-mentioned technical scheme, the position of setting up the restriction gyro wheel of shell fragment reduces the wheel body offset of gyro wheel at the in-process that slides, and then makes the detection portion slide more stably, and the accuracy that the CCD camera shot the cracked image that awaits measuring is higher.
Preferably, one end of the supporting block, which is far away from the box body, is fixedly connected with a sliding plate;
the detection trigger unit is configured as an acceleration sensor which is arranged on the side wall of the sliding plate;
when the displacement of the sliding plate reaches a set value, a trigger signal is output.
Through adopting above-mentioned technical scheme, be equipped with on the sliding plate of fixed connection on the supporting shoe, when the sliding plate slided on the crack that awaits measuring, drive acceleration sensor displacement together, acceleration sensor detects the displacement volume of sliding plate and then detects the displacement volume of detecting part, reach the displacement volume and then export a trigger signal when the displacement volume, trigger signal is received and is responded by the CCD camera, realize awaiting measuring the continuous shooting of crack image, the user only needs control detecting part to continuously slide on the crack that awaits measuring and can shoot continuous crack image, more labour saving and time saving.
Preferably, the image acquisition control unit comprises a microprocessor provided with an ARM chip;
the microprocessor provided with an ARM chip is in signal connection with the detection trigger unit, receives the trigger signal and outputs a control signal;
and the microprocessor provided with an ARM chip is in signal connection with the CCD camera, and the CCD camera receives the control signal and outputs image data.
Through adopting above-mentioned technical scheme, the microprocessor that is equipped with the ARM chip of image acquisition control unit cooperatees with detecting trigger unit, realizes controlling the action of shooing of CCD camera to the crack through the displacement volume that detects the detection portion for the user saves and shoots the step in order to obtain image data to the crack section by section, and more labour saving and time saving, and carries out continuous collection to the image of crack, makes the image data that the crack measuring apparatu obtained more accurate.
Preferably, the end face of one end of the box body, which is far away from the CCD camera, is integrally formed with a handheld grip.
Through adopting above-mentioned technical scheme, the setting up of handheld handle makes the staff use crack width measuring apparatu to examine time measuring crack, directly uses handheld handle for crack width measuring apparatu's use is more convenient.
To sum up, the application comprises the following beneficial technical effects:
by combining the distance measurement module, the image identification module, the numerical value comparison module and the like in the prior art, the effect that the crack width measuring instrument continuously collects the image data of the crack and automatically outputs the maximum value of the crack is realized, the step that a user collects the image data of the crack section by section is omitted, time and labor are saved, and the measurement is accurate and convenient.
Drawings
Fig. 1 is a structural view of a crack width measuring instrument according to the present invention.
Fig. 2 is a signal transmission block diagram of the fracture width measuring instrument of the present invention.
Fig. 3 is a schematic structural diagram of a detection part of the combination of the roller and the infrared correlation sensor of the utility model.
Fig. 4 is a schematic structural view of a detection part of the combination of the roller and the infrared distance measuring sensor of the present invention.
Fig. 5 is a schematic structural view of a detecting portion of the combination of the slide plate and the acceleration sensor of the present invention.
Description of reference numerals: 1. a detection section; 11. an image collector; 12. a box body; 13. a support block; 14. a roller; 141. an anti-slip groove; 142. an anti-slip film; 15. a through hole; 16. a notch; 17. a bump; 18 a spring plate; 19. a slide plate; 2. a hand-held portion; 21. a display; 3. a detection trigger unit; 4. an image acquisition control unit; 5. an image storage unit; 6. an image processing unit; 61. an image recognition module; 62. and a width sorting module.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses crack width measuring apparatu, mainly used detects in concrete structure house detects, bridge structures detects and road surface structure detects.
The crack width measuring instrument comprises a detecting part 1 and a handheld part 2. Referring to fig. 1, an image collector 11 is installed on the detecting part 1, and the image collector 11 collects an image of a crack to be detected. The display 21 is mounted on the hand-held portion 2, and the display 21 displays the crack width data measured by the crack width measuring instrument.
Referring to fig. 2, the fracture width measuring instrument further includes a detection triggering unit 3, an image acquisition control unit 4, an image storage unit 5, and an image processing unit 6.
The detection trigger unit 3 detects the distance moved by the probe unit 1 and outputs a trigger signal.
The image acquisition control unit 4 is in signal connection with the detection trigger unit 3 through a signal line, and the image acquisition control unit 4 receives and responds to the trigger signal to shoot and output image data of the crack to be detected.
The image storage unit 5 is connected with the image acquisition control unit 4 through data bus line data, and the display 21 acquires, outputs and stores image data.
The image processing unit 6 is connected with the image acquisition control unit 4 and the image data storage unit 5 through data bus, identifies the image data and sorts the image data; meanwhile, the image processing unit 6 may be connected to the image acquisition control unit 4 through a data cable, and then connected to the image data storage unit 5 through a data cable. The image data is stored in the image storage unit 5 and is directly connected with the image processing unit 6, and the data can be directly processed by the image processing unit 6, so that the processing efficiency of the image data of the crack width measuring instrument is higher, and the sensitivity of the width measuring instrument is further improved; the image storage unit 5 can also reduce the occurrence of image data loss when the width measuring instrument is halted, and the robustness of the width measuring instrument is increased.
In this embodiment, the image collector 11 is configured as a CCD camera with a microprocessor of an ARM chip, and the CCD camera may be replaced with a CMOS camera according to the needs of the use scene and the shooting effect, which is not limited in the present invention.
The microprocessor with ARM chip generates corresponding time sequence to realize the drive of CCD through configuring its own DCMI channel. And outputting a trigger signal and controlling the CCD camera to trigger the shooting action of the CCD camera. The CCD camera receives the trigger signal and finishes image acquisition, and image data is output.
The CCD camera provided with the ARM chip is an existing ARM intelligent camera and has multiple functions of supporting positioning guidance, size measurement, ID recognition, OCR, defect detection and the like.
In other embodiments, the microprocessor provided with the ARM chip can be replaced by a 51 single chip microcomputer or an AVR single chip microcomputer according to the requirements of use effects.
The image processing unit 6 comprises a loaded image recognition module 61 and a width sorting module 62. The image recognition program module 61 performs recognition processing on the image data; the width sorting program module 62 sorts the image data processed by the image recognition module 61 and outputs the maximum crack width value.
In this embodiment, the image recognition module 61 is configured as an FPGA chip loaded with a matlab image gray processing program, and performs gray processing on the crack image and outputs a crack width value. According to the requirement of the use effect, the image recognition module 61 may be replaced by an FPGA chip loaded with an image generator (DGM) for generating a countermeasure network based on depth convolution to generate a crack image, and the like, which is not described in detail in this embodiment.
In the present embodiment, the width sorting module 62 is configured with an FPGA chip loaded with Verilog HDL, compares the crack width values output by the image recognition module 61, and outputs the maximum crack width value.
The FPGA chip loaded with the matlab image gray scale processing program and the gray scale algorithm and the FPGA chip of the Verilog HDL are existing program function modules, and are not changed in this embodiment.
The detection part 1 comprises a box body 12, and referring to fig. 2 and 3, the box body 12 is arranged in a cuboid shape, a mounting groove is formed in the bottom of the box body 12, two supporting blocks 13 which are arranged oppositely are integrally formed at the bottom of the mounting groove, and a certain distance is reserved between the supporting blocks 13 and the inner side wall of the box body 12.
The CCD camera is embedded and installed at the bottom of the box body 12 and is positioned between the two supporting blocks 13. When the supporting block 13 makes the CCD camera continuously displace on the crack, the distance between the CCD camera and the crack to be measured is kept consistent, so that the accuracy of the CCD camera for shooting the crack image is higher.
The one end of box body 12 keeping away from the mounting groove is equipped with handheld handle 7 with box body 12 integrated into one piece, refer to fig. 1, and the user can handheld handle 7 on the box body 12 in order to promote the box body displacement, and is more convenient.
Referring to fig. 3 and 4, four rollers 14 are rotatably connected to the supporting block 13, the rollers 14 are opposite to each other in pairs, and the opposite rollers 14 are fixedly connected through connecting rods. The roller 14 drives the box 12 to move continuously parallel to the plane of the crack to be measured, and further drives the CCD camera to move continuously on the crack to be measured and acquire the image of the crack to be measured.
The detection trigger unit 3 includes an infrared correlation sensor. The transmitting end and the receiving end of the infrared correlation sensor are respectively arranged on the box body and located on two sides of the roller 14, the roller 14 is provided with a through hole 15 or a notch 16, and the edge of the roller 14 in the embodiment is provided with a through hole 15 with a radial cross section similar to a circle.
When the roller 14 rotates to a set angle, the roller 14 rotates until the notch is approximately on the same horizontal line with the transmitting end and the receiving end of the infrared correlation sensor, and infrared rays transmitted by the transmitting end of the infrared correlation sensor penetrate through the notch to enter the receiving end. When the roller 14 rotates for one circle, the receiving end of the infrared ray opposite-emitting sensor receives a high level signal, and the number of rolling circles of the roller 14 can be set according to the photographing range of the CCD camera, so that when the roller 14 rolls for setting the number of circles, a trigger signal is output.
For example, if the circumference of the roller is C and the photographing range of the CCD camera is 5C × C, it can be set that when the roller rotates for 5 turns, the receiving end outputs 5 high level signals and outputs one trigger signal. Due to the fact that the photographing parameters of different cameras are different, the number of the rotation turns of the roller 14 in the actual use scene can be set according to the photographing range of the adopted camera.
In some other embodiments, in order to detect the number of rotations of the roller 14, the following manner may also be adopted. The lateral wall of the roller 14 close to the box body is provided with a convex block 17, the detection trigger unit 3 is configured to be an infrared distance measuring sensor, and the infrared distance measuring sensor is installed on the box body 12 and is positioned on one side of the roller 14 with the convex block 17.
When the roller 14 rotates to a set angle, the infrared rays emitted by the emitting end of the infrared distance measuring sensor irradiate the surface of the bump 17, and when the roller 14 rotates for one circle, the receiving end of the infrared distance measuring sensor receives a high level signal, the number of rolling circles of the roller 14 can be set according to the photographing range of the CCD camera, so that when the roller 14 rolls for a fixed number of circles, a trigger signal is output.
Referring to fig. 3 and 4, when the roller 14 rolls on a wall or a ground where a crack is located, in order to reduce the occurrence of a slip condition of the roller 14 and improve the accuracy of image acquisition by the CCD camera, the roller 14 is provided with anti-slip grooves 141, and the anti-slip grooves 141 are arranged in a circumferential array along the wheel surface of the roller 14.
In an actual use scenario, the anti-slip groove 141 may be replaced by an anti-slip film 142 covering the tread of the roller 14, so as to increase the friction coefficient of the tread of the roller 14 and reduce the occurrence of the slipping condition of the roller 14. For example, a layer of silica gel anti-slip film or film-forming resin may be applied to the tread of the roller 14.
The box body 12 is close to the inside wall fixedly connected with anti-shake piece of gyro wheel 14, refers to fig. 3, and anti-shake piece can set up to be the shell fragment 18 that the C font set up, and one side fixed connection of shell fragment 18 is in the inside wall of box body 12, and gyro wheel 14 cup joints the outside at gyro wheel 14. When the roller 14 encounters an uneven wall surface in the rolling process, the wheel body of the roller 14 deflects, and the elastic sheet 18 limits the deflection of the roller 14, so that the stability of the box body 12 in the displacement process is improved.
In some other embodiments, the roller 14 may be replaced with a sliding plate 19 in order to detect the displacement of the cassette 12. Referring to fig. 5, the sliding plate 19 is located the bottom of the box body 12, the sliding plate 19 is arranged in a T shape, the sliding plate 19 drives the box body 12 to slide in parallel to the plane where the crack to be measured is located, and the distance between the CCD camera and the plane where the crack is located is consistent, so that the accuracy of the image collected by the CCD camera is higher, and the accuracy of the crack width measuring instrument is further increased.
At this time, the detecting component 31 may be configured as an acceleration sensor, which is mounted on the side wall of the sliding plate 19 and moves together with the sliding plate 19 to detect the displacement of the sliding plate 19; when the displacement of the sliding plate 19 is a set value or an integral multiple of the set value, the acceleration sensor outputs a high level signal and outputs a trigger signal. For example, the shooting range of the CCD camera is 2L × L, when the displacement of the slide plate is L, the acceleration sensor outputs a high level signal, when the displacement of the slide plate 19 is 2L, the acceleration sensor outputs a second high level signal, outputs a trigger signal, and so on.
In this embodiment, the acceleration sensor is configured as an IEPE type acceleration sensor, which has a small volume and a high cost performance, and the IEPE type acceleration sensor can be replaced with other types of acceleration sensors according to the needs of usage effects, which is not described in detail in this embodiment.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a crack width measuring apparatu, includes detection portion (1) and handheld portion (2), be equipped with image collector (11) on detection portion (1), be equipped with display (21) on handheld portion (2), its characterized in that still includes:
the detection trigger unit (3) is used for detecting the moving distance of the detection part (1) and outputting a trigger signal;
the image acquisition control unit (4) is in signal connection with the detection trigger unit (3) and is used for receiving and responding to the trigger signal so as to shoot and output image data of the crack to be detected;
the image storage unit (5) is in data connection with the image acquisition control unit (4) and is used for acquiring and storing the image data;
the image processing unit (6) is in data connection with the image acquisition control unit (4) and/or the image storage unit (5), and comprises an image identification module (61) and a width sorting module (62) which is used for receiving the image data, identifying and outputting the width data of the crack to be detected by the image identification module (61), and receiving the width data and sorting and outputting the maximum width data by the width sorting module (62).
2. The crack width measuring instrument according to claim 1, wherein the detecting part (1) comprises a box body (12), and the image collector (11) is embedded and installed at the bottom of the box body (12);
the image collector (11) is configured as a CCD camera;
two supporting blocks (13) are oppositely arranged on the end face of the bottom of the box body (12);
the CCD camera is arranged between the two supporting blocks (13), and the end face, far away from the box body (12), of each supporting block (13) is higher than the plane where the lens of the CCD camera is located.
3. The crack width measuring instrument according to claim 2, characterized in that a roller (14) is rotatably arranged on the supporting block (13), and a through hole (15) or a notch (16) is formed on the roller (14);
the detection trigger unit (3) is configured as an infrared correlation sensor, and the transmitting end and the receiving end of the infrared correlation sensor (31) are respectively arranged on the box body (12) and positioned at two sides of the roller (14);
when the roller (14) rotates to a set angle, infrared rays emitted by the emitting end of the infrared correlation sensor (31) penetrate through the through hole (15) or the notch (16) to enter the receiving end, and the triggering signal is output.
4. A crack width measuring instrument according to claim 2, characterized in that the supporting block (13) is rotatably provided with a roller (14), and the side wall of the roller (14) is provided with a bump (17);
the detection trigger unit (3) is configured to be an infrared distance measuring sensor, and the infrared distance measuring sensor (32) is arranged on the box body (12) and is positioned on one side of the roller (14) with the convex block (17);
when the roller (14) rotates to a set angle, infrared rays emitted by the emitting end of the infrared distance measuring sensor (32) are projected to the bump (17) and reflected to enter the receiving end, and the trigger signal is output.
5. Crack width measuring device according to claim 3 or 4, characterized in that the roller (14) is provided with anti-slip grooves (141) or anti-slip films (142).
6. The crack width measuring instrument according to claim 3 or 4, characterized in that the two sides of the box body (12) close to the roller (14) are provided with C-shaped elastic pieces (18), one ends of the elastic pieces (18) far away from the roller (14) are fixedly connected to the inner side wall of the box body (12), and the roller (14) is located in the middle of the inner side wall of the elastic pieces (18).
7. Crack width measuring instrument according to claim 2, characterized in that a sliding plate (19) is fixedly connected to the end of the supporting block (13) remote from the box (12);
the detection trigger unit (3) is configured as an acceleration sensor, and the acceleration sensor (33) is arranged on the side wall of the sliding plate (19);
wherein the acceleration sensor (33) displaces along with the sliding plate (19), and when the displacement of the acceleration sensor (33) reaches a set value, the trigger signal is output.
8. Crack width measuring instrument according to claim 4 or 7, characterized in that the image acquisition control unit (4) comprises a microprocessor provided with an ARM chip;
the microprocessor provided with the ARM chip is in signal connection with the detection trigger unit (3) and is used for receiving the trigger signal and outputting a control signal;
the microprocessor provided with the ARM chip is in signal connection with the CCD camera, and the CCD camera receives the control signal and outputs the image data.
9. Crack width measuring device according to claim 2, characterized in that the end of the case (12) facing away from the CCD camera is formed with a hand grip (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123436692.9U CN216621028U (en) | 2021-12-30 | 2021-12-30 | Crack width measuring instrument |
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| CN202123436692.9U CN216621028U (en) | 2021-12-30 | 2021-12-30 | Crack width measuring instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116147506A (en) * | 2023-04-23 | 2023-05-23 | 钛玛科（北京）工业科技有限公司 | Dual CCD camera width measurement method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116147506A (en) * | 2023-04-23 | 2023-05-23 | 钛玛科（北京）工业科技有限公司 | Dual CCD camera width measurement method and system |
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