KR101202096B1 - Media thickness detector - Google Patents
Media thickness detector Download PDFInfo
- Publication number
- KR101202096B1 KR101202096B1 KR20100073595A KR20100073595A KR101202096B1 KR 101202096 B1 KR101202096 B1 KR 101202096B1 KR 20100073595 A KR20100073595 A KR 20100073595A KR 20100073595 A KR20100073595 A KR 20100073595A KR 101202096 B1 KR101202096 B1 KR 101202096B1
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- KR
- South Korea
- Prior art keywords
- medium
- roller
- thickness
- resistance value
- moving
- Prior art date
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Abstract
The present invention relates to a thickness sensing apparatus of a medium. In the present invention, the first roller 120 is fixedly installed in the conveying channel 110 of the medium (m), and the first roller 120 when the medium (m) passes in contact with the first roller (120) The second roller 130 is moved upwards by the thickness of the medium (m) while falling apart from), and moves downward again when the medium (m) passes completely. One end is connected to the second roller 130, and a link 150 having a predetermined length moving in the same direction as the moving direction of the second roller 130 is connected, and the other end of the link 150 is partially overlapped. In the state, a strain gauge 160 that is a resistance sensor that measures the amount of deformation generated by the movement of the link 150 as a resistance value is installed. Therefore, when the medium m moves, the strain gauge 160 is deformed by the thickness of the medium m, and the amount of deformation is output as a resistance value. This resistance value can be used to accurately detect the thickness of the medium. In addition, if the link is installed between the moving roller and the strain gauge using the lever principle so that the deformation amount of the strain gauge is greater than the moving distance of the moving roller moving by the thickness of the medium m, the thickness of the medium is further increased. It can be detected precisely.
Description
BACKGROUND OF THE
There are two ways to detect the thickness of the medium.
The first is shown in Fig. 1A. As shown therein, the
Second is shown in Fig. 1B. As shown in the drawing, the
However, the prior art has the following problems.
As shown in FIG. 1A, a method of detecting a change in mechanical resistance has a low precision and a large error due to a mechanical structure.
In addition, in the method of measuring by using the light amount of the sensor as shown in Figure 1b it may be difficult to measure the data stably because distortion may occur due to the nature of the light.
Therefore, an object of the present invention is to solve the above problems, the thickness of the medium to measure the thickness of the medium accurately and stably by using a strain gauge capable of measuring the amount of change due to the change in the resistance value against the minute change To provide a device.
Another object of the present invention is to be able to detect the thickness of the medium difficult to detect the thickness.
According to a feature of the present invention for achieving the above object, the first roller is fixed to the conveying channel of the medium; A second roller that moves in one direction by the thickness of the medium while falling from the first roller when the medium passes in contact with the first roller, and moves to the original position when the medium passes completely; One end of the link member is connected to the second roller to move in the same direction as the movement direction of the second roller: a link member of the predetermined length of the link member in the state where the other end of the link member and the overlapping portion A resistance value measuring member measuring the resistance value; And a thickness sensing unit for sensing a thickness of the medium by using the resistance value, wherein the link member is provided with a rotation shaft such that both ends of the link member can rotate around the rotation shaft, and the rotation shaft rotates of the link member. As a result, the resistance value measuring member overlapping with the link member may be disposed at a position where the resistance value measuring member overlaps more than the moving distance of the second roller.
The present invention includes a roller guide for guiding the reciprocating motion of the second roller; And an elastic member interposed in the roller guide and providing an elastic force to move the second roller whose position is changed to its original position.
The invention further includes a temperature compensation resistance value measuring member for compensating for the resistance value changed by the internal temperature of the thickness sensing device when sensing the thickness of the medium, the resistance value and the temperature compensation of the resistance value measuring member The first processing unit receives the temperature-compensated resistance of the resistance measuring member and calculates and outputs an actual resistance value as a voltage value, and extracts only a voltage value of a portion of the voltage value output from the first processing unit. And a second processor for outputting a value corresponding to the thickness.
The resistance value measuring member and the temperature compensation resistance value measuring member are strain gauges.
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In the present invention, the strain gauge is attached to a part of the transfer roller fixedly attached to the moving roller moving as much as the thickness of the medium when the medium is transported, and when the medium is transported, deformation occurs in a part of the strain gauge by the thickness of the medium. The thickness of the medium is sensed using the resistance measured by the amount of deformation. Therefore, the thickness of the medium can be detected more accurately and stably.
In addition, a link using the lever principle is installed between the moving roller and the strain gauge when moving the medium, so that the strain gauge is more deformed when the medium is transferred, so that even a medium having a thin thickness that is difficult to detect thickness Can be detected accurately.
1A and 1B are schematic configuration diagrams illustrating a thickness sensing apparatus of a medium according to the prior art.
2 is a side configuration diagram of a thickness sensing apparatus of a medium according to the first embodiment of the present invention;
FIG. 3 is a block diagram proposed to circuitly describe a thickness sensing operation of a medium in FIG. 2.
4 is a side configuration diagram of a thickness sensing apparatus of a medium according to a second embodiment of the present invention;
Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiments of the present invention, when it is determined that a detailed description of a related well-known configuration or function interferes with the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.
In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;
2 is a side configuration diagram of a thickness sensing apparatus of a medium according to the first embodiment of the present invention.
Referring to FIG. 1, the media
A conveying
A first roller (hereinafter, referred to as a 'fixing roller') 120 is rotatably installed on the
A second roller (hereinafter, referred to as a 'moving roller') 130 is provided with the fixed
The
One end of the
The other end of the
On the other hand, a circuit configuration for sensing the thickness of the medium (m) by using the resistance value output from the
Referring to FIG. 3, a
The
A
The A /
A
The operation of the medium thickness sensing apparatus according to the first embodiment of the present invention configured as described above will be described.
The medium m is conveyed in the direction of the arrow through the
Then, the fixed
When the moving
When the
The resistance value of the
The
Based on the thickness value output from the A /
As described above, it can be seen that the thickness of the
On the other hand, when the medium (m) passes through the fixed
When the other medium m is transferred, the thickness of the medium m is sensed by repeating the above process.
4 is a side configuration diagram of a thickness sensing apparatus of a medium according to a second embodiment of the present invention. The configuration of the second embodiment is partly the same as the first embodiment described above, and there is a difference in the link configuration interposed between the moving roller and the strain gauge. However, the configuration of FIG. 4 will be described as a whole.
Referring to FIG. 4, the medium
A conveying
The fixing
The moving
A
One end of the
On the other hand, since the circuit configuration for detecting the thickness of the medium (m) by using the resistance value output from the
Next, the operation of the medium thickness sensing apparatus according to the second embodiment of the present invention configured as described above will be described.
When the medium m is conveyed in the direction of the arrow through the conveying
Then, the fixed
When the moving
Accordingly, the tip of the
In this case, when the position of the pivot shaft A is changed so that the other end is rotated more than one end of the
The resistance value of the
On the other hand, in the present embodiment, when the medium moves horizontally between the fixed
In addition, even if the fixed
In addition, in the present embodiment, although the thickness sensing unit for detecting the thickness of the medium using the resistance value is configured, the strain gauge for measuring the amount of deformation generated according to the thickness of the medium as the resistance value is used to directly measure the thickness of the medium using the resistance value. You can also detect it. This embodiment is also applicable to the present invention.
As described above, according to the present invention, a strain gauge, which is a resistance sensor, is used to measure the amount of deformation by the thickness of the medium to output a resistance value, so that the thickness of the medium can be accurately measured, and a link connected to the strain gauge Rotating using the lever principle allows a greater amount of deformation than the thickness of the medium being conveyed, so that the thickness of the medium can be accurately measured, as well as the thickness of a very thin medium that is difficult to detect.
While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Terms used generally, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present invention.
The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.
120, 220: fixed
140, 240: roller guides 150, 250: link
160, 260: strain gauge 162: temperature compensation strain gauge
170: first processing unit (Wightstone bridge)
180: second processing unit 190: A / D converter
Claims (6)
A second roller that is moved in one direction by the thickness of the medium while falling from the first roller when the medium passes in contact with the first roller, and moves to the original position when the medium passes completely;
A link member having a predetermined length connected to one end of the second roller and moving in the same direction as the moving direction of the second roller;
A resistance value measuring member for measuring a deformation amount generated by the movement of the link member in a state where the other end and a part of the link member overlap with a resistance value; And
It includes a thickness detecting unit for detecting the thickness of the medium using the resistance value,
The link member is provided with a rotating shaft so that both ends thereof can be rotated about the rotating shaft, and the rotating shaft measures the resistance value overlapping with the link member compared to the moving distance of the second roller by the rotating of the link member. A thickness sensing device of a medium disposed at a position where a member can be deformed more.
A roller guide for guiding the reciprocating motion of the second roller;
And a resilient member interposed in the roller guide and providing an elastic force to move the second roller which is changed in position to its original position.
Further comprising a temperature compensation resistance value measuring member for compensating for the resistance value changed by the internal temperature of the thickness sensing device when sensing the thickness of the medium,
A first processor which receives the resistance value of the resistance value measuring member and the temperature compensated resistance value of the temperature compensation resistance value measuring member and calculates and outputs an actual resistance value as a voltage value;
And a second processor for extracting only a voltage value of a partial region among the voltage values output from the first processor, and outputting a value corresponding to the thickness of the medium.
And the resistance measuring member and the temperature compensating resistance measuring member are strain gauges.
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KR20100073595A KR101202096B1 (en) | 2010-07-29 | 2010-07-29 | Media thickness detector |
Applications Claiming Priority (1)
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KR20100073595A KR101202096B1 (en) | 2010-07-29 | 2010-07-29 | Media thickness detector |
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KR101202096B1 true KR101202096B1 (en) | 2012-11-16 |
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KR101386758B1 (en) * | 2012-10-16 | 2014-04-21 | 함순식 | Apparatus of measuring diameter of object and method using same |
KR101864691B1 (en) * | 2012-12-27 | 2018-06-07 | 주식회사 케이씨텍 | Appratus for Detecting of Deformation of a Substrate |
CN114623748A (en) * | 2022-02-24 | 2022-06-14 | 王奇峰 | Automobile mold thickness detection equipment |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR200245771Y1 (en) * | 2001-05-22 | 2001-10-15 | 이영호 | Strain factor measuring device of weld zone |
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Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200245771Y1 (en) * | 2001-05-22 | 2001-10-15 | 이영호 | Strain factor measuring device of weld zone |
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