CN221280179U - Length measuring device - Google Patents
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- CN221280179U CN221280179U CN202322843822.3U CN202322843822U CN221280179U CN 221280179 U CN221280179 U CN 221280179U CN 202322843822 U CN202322843822 U CN 202322843822U CN 221280179 U CN221280179 U CN 221280179U
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Abstract
The utility model provides a length measuring device. The length measuring device includes: a first image sensing structure; the length measuring device further comprises a measured manuscript, two ends of the measured manuscript respectively fall into the detection area of the first image sensing structure and the detection area of the second image sensing structure, and the first image sensing structure and the second image sensing structure are connected in an adjustable mode through a transmission structure distance; the driving structure is connected with the transmission structure, so that the distance between the first image sensing structure and the second image sensing structure is adjusted. The length measuring device solves the problem that the length measuring device in the prior art is complex in structure.
Description
Technical Field
The utility model relates to the technical field of image sensing equipment, in particular to a length measuring device.
Background
At present, most of the schemes of the length measuring device use pixel point number and calibration method to obtain converted data. In this case, if the magnification of the camera is too large, there will be some deviation in the data of the measured object, and on the one hand, there will be a lot of data operations, and when the speed requirement for length measurement is extremely high, the requirement is made on the hardware of the system and the algorithm of the programmer. If the method is not realized, the requirement can be reduced, and the efficiency is reduced. However, if the use scenario is complicated, the length measurement is only a small part, but it takes a lot of hardware cost, and the structure of the length measurement device is complicated, which is definitely not feasible.
That is, the length measuring device in the prior art has a problem of complicated structure.
Disclosure of utility model
The utility model mainly aims to provide a length measuring device which solves the problem that the length measuring device in the prior art is complex in structure.
In order to achieve the above object, the present utility model provides a length measuring apparatus comprising: a first image sensing structure; the length measuring device further comprises a measured manuscript, two ends of the measured manuscript respectively fall into the detection area of the first image sensing structure and the detection area of the second image sensing structure, and the first image sensing structure and the second image sensing structure are connected in an adjustable mode through a transmission structure distance; the driving structure is connected with the transmission structure, so that the distance between the first image sensing structure and the second image sensing structure is adjusted.
Further, the first image sensing structure includes: a frame body, a lens structure, the lens structure being disposed in the frame body; the PCB circuit board is arranged in the frame body and is positioned at one side of the frame body, and a photoelectric conversion chip is carried on the surface of one side of the PCB circuit board facing the lens structure and corresponds to the lens structure; and the light source is arranged in the frame body and positioned at the periphery side of the lens structure, and light emitted by the light source obliquely irradiates the end part of the tested manuscript.
Further, the photoelectric conversion chip in the first image sensing structure and the second image sensing structure is one.
Further, the transmission structure is a screw rod and the driving structure is a motor.
Further, the lead screw includes: the screw is provided with a first thread section and a second thread section; the two nuts are matched with the first thread section and the second thread section through balls, and the first image sensing structure and the second image sensing structure are connected with the two nuts respectively.
Further, the first thread segments are threaded in an opposite direction to the second thread segments.
Further, the lead screw includes: the screw is provided with a thread section, the thread section extends along the length direction of the screw, and two sides of the thread section extend to a position spaced from the end part of the screw; the screw cap is arranged at the end part of the screw rod and is positioned in the area where the screw rod is not provided with the thread section; the nut is matched with the thread section through the ball, one of the first image sensing structure and the second image sensing structure is connected with the nut, and the other of the first image sensing structure and the second image sensing structure is connected with the nut.
Further, a preset distance A is arranged between the first image sensing structure and the second image sensing structure, and the preset distance A is more than 0mm and less than or equal to 1500mm.
Further, the driving structure is connected with the transmission structure through a connecting shaft.
Further, the length of the detection area of the first image sensing structure is the same as or different from the length of the detection area of the second image sensing structure.
By applying the technical scheme of the utility model, the length measuring device comprises a first image sensing structure, a second image sensing structure and a driving structure, wherein the first image sensing structure and the second image sensing structure are identical in structure, the first image sensing structure and the second image sensing structure are positioned on the same straight line, the detection areas of the first image sensing structure and the second image sensing structure are positioned on the same side, the length measuring device further comprises a tested manuscript, two ends of the tested manuscript respectively fall into the detection areas of the first image sensing structure and the second image sensing structure, and the first image sensing structure and the second image sensing structure are connected in an adjustable way through the distance of the driving structure; the driving structure is connected with the transmission structure so as to adjust the distance between the first image sensing structure and the second image sensing structure.
According to the application, the first image sensing structure and the second image sensing structure are arranged, and the driving structure is adopted to adjust the distance between the first image sensing structure and the second image sensing structure through the transmission structure, so that two ends of a tested manuscript respectively fall into the detection area of the first image sensing structure and the detection area of the second image sensing structure, the first image sensing structure and the second image sensing structure can respectively measure the lengths of two end positions of the tested manuscript, and then the distance between the first image sensing structure and the second image sensing structure is added, so that the whole length of the tested manuscript is obtained, and the automatic measurement of the tested manuscript is realized. When the end parts of the tested manuscript are not in the detection areas of the first image sensing structure and the second image sensing structure, the first image sensing structure and the second image sensing structure can be adjusted through the transmission structure and the driving structure, so that the two end parts of the tested manuscript respectively fall into the detection areas of the first image sensing structure and the second image sensing structure. The length measuring device of the application not only simplifies the structure and reduces the length measuring difficulty, but also improves the detection efficiency, and has strong adaptability and small error.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 shows a schematic structural view of a length measuring device according to an alternative embodiment of the present utility model;
FIG. 2 shows a schematic structural diagram of the first image sensing structure of FIG. 1;
FIG. 3 shows a schematic measurement diagram of the length measuring device of FIG. 1;
FIG. 4 shows a measurement state diagram of a length measurement device of an alternative embodiment of the present utility model;
Fig. 5 shows another measurement state diagram of a length measurement device according to an alternative embodiment of the utility model.
Wherein the above figures include the following reference numerals:
10. A first image sensing structure; 11. a frame; 12. a lens structure; 13. a PCB circuit board; 14. a photoelectric conversion chip; 15. a light source; 20. a second image sensing structure; 30. a transmission structure; 40. a driving structure; 50. the manuscript to be tested.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.
In order to solve the problem that a length measuring device in the prior art is complex in structure, the utility model provides the length measuring device.
As shown in fig. 1 to 5, the length measuring device includes a first image sensing structure 10, a second image sensing structure 20, and a driving structure 40, the first image sensing structure 10 is identical to the second image sensing structure 20, the first image sensing structure 10 and the second image sensing structure 20 are positioned on the same straight line, the detection areas of the first image sensing structure 10 and the second image sensing structure 20 are positioned on the same side, the length measuring device further includes a measured manuscript 50, two ends of the measured manuscript 50 respectively fall into the detection areas of the first image sensing structure 10 and the second image sensing structure 20, and the first image sensing structure 10 and the second image sensing structure 20 are adjustably connected by a distance of the driving structure 30; the driving structure 40 is connected to the transmission structure 30 to adjust the distance between the first image sensing structure 10 and the second image sensing structure 20.
According to the application, the first image sensing structure 10 and the second image sensing structure 20 are arranged, the driving structure 40 is adopted to adjust the distance between the first image sensing structure 10 and the second image sensing structure 20 through the transmission structure 30, so that two ends of a tested manuscript 50 respectively fall into the detection area of the first image sensing structure 10 and the detection area of the second image sensing structure 20, the first image sensing structure 10 and the second image sensing structure 20 can respectively measure the lengths of two end positions of the tested manuscript 50, and then the distance between the first image sensing structure 10 and the second image sensing structure 20 is added, so that the whole length of the tested manuscript 50 is obtained, and the automatic measurement of the tested manuscript 50 is realized. When the end portions of the measured document 50 are not within the detection areas of the first image sensing structure 10 and the second image sensing structure 20, the first image sensing structure 10 and the second image sensing structure 20 can be adjusted by the transmission structure 30 and the driving structure 40, so that the two end portions of the measured document 50 fall into the detection areas of the first image sensing structure 10 and the second image sensing structure 20, respectively. The length measuring device of the application not only simplifies the structure and reduces the length measuring difficulty, but also improves the detection efficiency, and has strong adaptability and small error.
It should be noted that, the length measuring device of the present application can give consideration to the measured manuscript 50 with any length, has better compatibility, smaller measurement error, usually within 0.1mm, simpler algorithm for calculating the length, less data transmission, reduced calculation difficulty, simplified calculation program, simplified structure, avoided using too much hardware, and reduced cost. The length measuring device can automatically measure the length of the document 50 to be measured.
Referring to fig. 1, the first image sensing structure 10 and the second image sensing structure 20 are both located above the measured document 50, the detection area of the first image sensing structure 10 covers one end of the measured document 50, and the detection area of the second image sensing structure 20 covers the other end of the measured document 50. The scanning direction of the first image sensing structure 10 and the scanning direction of the second image sensing structure 20 are co-directional and located on the same straight line.
In an alternative embodiment of the present application, the length of the detection area of the first image sensing structure 10 may be the same as or different from the length of the detection area of the second image sensing structure 20. It is necessary to ensure that both ends of the measured document 50 fall into the detection areas of the first image sensing structure 10 and the second image sensing structure 20, respectively, so that it can be determined that the end of the measured document 50 is located at the nth pixel point of the sensor.
In an alternative embodiment of the application, the length of the detection area of the first image sensing structure 10 is 18.29mm and the length of the detection area of the second image sensing structure 20 is 18.29mm.
In an alternative embodiment of the present application, referring to fig. 1 and 3, the first image sensing structure 10 and the second image sensing structure 20 have a preset distance a therebetween, and the preset distance a is greater than 0mm and less than or equal to 1500mm. The preset distance is an accurate value, the error is controlled to be 0.01mm, and the device is shipped after delivery calibration, and of course, the preset distance is self-settable and is not fixed. The length of the measured manuscript 50=the length B measured by the first image sensing structure 10+the preset distance a between the first image sensing structure 10 and the second image sensing structure 20+the length C measured by the second image sensing structure 20, and the measurement error is within 0.1 mm. By setting the preset distance A as basic data, and then determining how many pixel points the end parts of the tested manuscript 50 detected by the first image sensing structure 10 and the second image sensing structure 20 occupy respectively, the lengths of the two end parts of the tested manuscript 50 in the first image sensing structure 10 and the second image sensing structure 20 are obtained through the pixel points respectively due to the fact that; only one light spot conversion chip is arranged in each of the two image sensing structures, so that the data volume is small, the calculation method is convenient, the calculation time is saved, and the measurement efficiency is improved.
It should be noted that, the predetermined distance a between the first image sensing structure 10 and the second image sensing structure 20 is equal to the length of the detection area where the detected document 50 does not fall into the first image sensing structure 10 and the second image sensing structure 20.
As shown in fig. 2, the first image sensing structure 10 includes a frame 11, a lens structure 12, a PCB circuit board 13, and a light source 15, the lens structure 12 being disposed in the frame 11; the PCB circuit board 13 is arranged in the frame 11 and is positioned at one side of the frame 11, a photoelectric conversion chip 14 is carried on one side surface of the PCB circuit board 13 facing the lens structure 12, the PCB circuit board 13 provides a circuit for the photoelectric conversion chip 14, and the photoelectric conversion chip 14 corresponds to the lens structure 12; the light source 15 is provided in the housing 11 on the peripheral side of the lens structure 12, and light emitted from the light source 15 is obliquely irradiated to the end of the test document 50. The frame 11 provides a mounting space for the lens structure 12, the PCB 13, the photoelectric conversion chip 14 and the light source 15, which is advantageous to ensure the reliability of the use of the above devices. The light emitted by the light source 15 irradiates onto the tested manuscript 50 and then is reflected back to the lens structure 12, and then is converged on the photoelectric conversion chip 14, so that the optical signal is converted into an electric signal. Finally, an image is formed, and the boundary line of the tested manuscript 50 is identified, so as to obtain the number of pixel points occupied by the end part. The number of pixels×the size of pixels=the length of the end portion of the measured document 50 in the first image sensing structure 10, and since the first image sensing structure 10 and the second image sensing structure 20 have the same structure, the composition of the second image sensing structure 20 can refer to the description of the first image sensing structure 10, and the description thereof will be omitted herein. Of course the measurement principle of the second image sensing structure 20 is also the same as that of the first image sensing structure 10.
Specifically, the photoelectric conversion chip 14 in each of the first image sensing structure 10 and the second image sensing structure 20 is one. The arrangement avoids the adoption of a plurality of photoelectric conversion chips 14 in the first image sensing structure 10 or the second image sensing structure 20, and unavoidable errors are formed due to gaps between the adjacent photoelectric conversion chips 14.
In one embodiment, the transmission structure 30 is a lead screw and the drive structure 40 is a motor.
In an alternative embodiment of the foregoing embodiment, the screw includes a screw and a nut, the screw having a first threaded section and a second threaded section, the first threaded section and the second threaded section being connected in sequence, the first threaded section and the second threaded section being threaded in opposite directions; the number of the nuts is two, the two nuts are matched with the first thread section and the second thread section through balls, and the first image sensing structure 10 and the second image sensing structure 20 are connected with the two nuts respectively. The arrangement is such that both the first image sensing structure 10 and the second image sensing structure 20 are movable and that the first image sensing structure 10 and the second image sensing structure 20 can be moved in a direction towards each other or in a direction away from each other when the electrode drives the screw rod to move, since the first thread segments are in opposite thread directions to the second thread segments, so that the movement directions of the first image sensing structure 10 and the second image sensing structure 20 are opposite.
In another alternative example of the above embodiment, the lead screw includes a screw, a nut and a nut,
The screw is provided with a thread section, the thread section extends along the length direction of the screw, and two sides of the thread section extend to a position spaced from the end part of the screw; the screw cap is arranged at the end part of the screw rod and is positioned in the area where the screw rod is not provided with the thread section; the nut is engaged with the thread segments by balls, one of the first image sensing structure 10 and the second image sensing structure 20 is coupled to the nut, and the other of the first image sensing structure 10 and the second image sensing structure 20 is coupled to the nut. The arrangement is such that one of the first image sensing structure 10 and the second image sensing structure 20 is stationary and the other is movable. When the first image sensing structure 10 is connected with the nut, the second image sensing structure 20 is connected with the nut, and the motor drives the screw rod to move, the first image sensing structure 10 is not moved, and the second image sensing structure 20 can move in a direction close to the first image sensing structure 10 or in a direction far away from the first image sensing structure 10.
When the length measuring device is assembled, the transmission structure 30 and the driving structure 40 are fixed on a horizontal metal plate, then the first image sensing structure 10 and the second image sensing structure 20 are arranged on the transmission structure 30, and the driving structure 40 is connected with the transmission structure 30 through a connecting shaft, so that synchronous rotation can be realized; the data processing and the picture processing and identification can be performed in an image sensing structure or transferred to a computer for processing.
Fig. 4 and 5 show measurement modes of the length measuring device when the measured document 50 is different, respectively.
As shown in fig. 4, after the factory calibration, the length measuring device obtains a preset distance a between the standard first image sensing structure 10 and the standard second image sensing structure 20, and after observation, both ends of the measured manuscript 50 in fig. 4 are just located in the detection areas of the first image sensing structure 10 and the second image sensing structure 20 respectively, at this time, the measurement can be directly performed, and finally, the measured manuscript 50 length=the length B measured by the first image sensing structure 10+the preset distance a between the first image sensing structure 10 and the second image sensing structure 20+the length C measured by the second image sensing structure 20.
As shown in fig. 5, when the production line changes the tested document 50, it is observed that one end of the tested document 50 is not within the detection area of the second image sensing structure 20, the second image sensing structure 20 is moved by the distance D in a direction approaching the first image sensing structure 10 using the transmission structure 30 and the driving structure 40, and then it is confirmed that the end of the tested document 50 is within the detection area of the second image sensing structure 20, at which time the length measuring device starts to operate, and the length=a-d+b+c of the tested document 50 is output.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A length measurement device, comprising:
A first image sensing structure (10);
The length measuring device comprises a first image sensing structure (10), a second image sensing structure (20), a first image sensing structure (10) and a second image sensing structure (20), wherein the first image sensing structure (10) and the second image sensing structure (20) are positioned on the same straight line, the detection areas of the first image sensing structure (10) and the second image sensing structure (20) are positioned on the same side, the length measuring device further comprises a tested manuscript (50), two ends of the tested manuscript (50) respectively fall into the detection areas of the first image sensing structure (10) and the second image sensing structure (20), and the first image sensing structure (10) and the second image sensing structure (20) are connected in a distance adjustable manner through a transmission structure (30);
-a driving structure (40), the driving structure (40) being connected to the transmission structure (30) for adjusting the distance between the first image sensing structure (10) and the second image sensing structure (20).
2. The length measurement device according to claim 1, wherein the first image sensing structure (10) comprises:
a frame (11),
A lens structure (12), the lens structure (12) being arranged in the frame (11);
A PCB circuit board (13), wherein the PCB circuit board (13) is arranged in the frame body (11) and is positioned at one side of the frame body (11), a photoelectric conversion chip (14) is carried on one side surface of the PCB circuit board (13) facing the lens structure (12), and the photoelectric conversion chip (14) corresponds to the lens structure (12);
And a light source (15), wherein the light source (15) is arranged in the frame (11) and is positioned on the periphery side of the lens structure (12), and the light emitted by the light source (15) obliquely irradiates the end part of the tested manuscript (50).
3. The length measurement device according to claim 1, wherein the photoelectric conversion chip (14) in the first image sensing structure (10) and the second image sensing structure (20) are each one.
4. The length measuring device according to claim 1, characterized in that the transmission structure (30) is a screw and the drive structure (40) is a motor.
5. The length measurement device of claim 4, wherein the lead screw comprises:
A screw having a first flight section and a second flight section;
The two nuts are matched with the first thread section and the second thread section through balls, and the first image sensing structure (10) and the second image sensing structure (20) are connected with the two nuts respectively.
6. The length measurement device of claim 5, wherein the first thread segments are threaded in an opposite direction than the second thread segments.
7. The length measurement device of claim 4, wherein the lead screw comprises:
the screw rod is provided with a thread section, the thread section extends along the length direction of the screw rod, and two sides of the thread section extend to a position spaced from the end part of the screw rod;
the screw cap is arranged at the end part of the screw rod and is positioned in the area where the screw rod is not provided with the thread section;
the nut is matched with the threaded section through a ball, one of the first image sensing structure (10) and the second image sensing structure (20) is connected with the nut, and the other of the first image sensing structure (10) and the second image sensing structure (20) is connected with the nut.
8. The length measurement device according to claim 1, characterized in that the first image sensing structure (10) and the second image sensing structure (20) have a preset distance a between them, the preset distance a being greater than 0mm and less than or equal to 1500mm.
9. Length measuring device according to any one of claims 1 to 8, characterized in that the drive structure (40) is connected with the transmission structure (30) by means of a connecting shaft.
10. The length measuring device according to claim 1, characterized in that the length of the detection area of the first image sensing structure (10) is the same or different from the length of the detection area of the second image sensing structure (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322843822.3U CN221280179U (en) | 2023-10-23 | 2023-10-23 | Length measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322843822.3U CN221280179U (en) | 2023-10-23 | 2023-10-23 | Length measuring device |
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| Publication Number | Publication Date |
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| CN221280179U true CN221280179U (en) | 2024-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322843822.3U Active CN221280179U (en) | 2023-10-23 | 2023-10-23 | Length measuring device |
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| CN (1) | CN221280179U (en) |
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2023
- 2023-10-23 CN CN202322843822.3U patent/CN221280179U/en active Active
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