CN104949727A - Magnetic induction shaftless character wheel direct reading device - Google Patents
Magnetic induction shaftless character wheel direct reading device Download PDFInfo
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- CN104949727A CN104949727A CN201510365410.0A CN201510365410A CN104949727A CN 104949727 A CN104949727 A CN 104949727A CN 201510365410 A CN201510365410 A CN 201510365410A CN 104949727 A CN104949727 A CN 104949727A
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- character wheel
- shaftless
- magnet steel
- reading device
- hollow cylinder
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Abstract
The invention relates to the field of measurement, in particular to a magnetic induction shaftless character wheel direct reading device. Circular magnetic steel is arranged in the middle of a character wheel. An angle sensor is arranged on one side of the character wheel to sense the rotation angle of the circular magnetic wheel so as to obtain the reading number of the character wheel. The problems that one or multiple pairs of photoelectric transistors are likely to be damaged when a photoelectric direct reading way is adopted, error codes exist, reading number errors cannot be judged, and photoelectric direct reading is likely to be affected by outside world illumination variations are solved. By sensing the rotation angle of the character wheel, the character wheel number reading precision is higher, the service life is longer, and performance is more stable.
Description
Technical field
The present invention relates to fields of measurement, particularly the shaftless character wheel direct-reading device of a kind of magnetic strength.
Background technology
The mode that the data acquisition of current water, gas meter is counted by character wheel mostly gathers, and is photo-electronic directly reading or tongue tube induction reading to the reading mode majority of character wheel; Wherein, adopt the mode of photo-electronic directly reading to carry out reading to character wheel and there is following problem: (1) photoelectric tube is fragile, and the photoelectric tube of damage there will be the mistake that correctly can not judge reading; (2) extraneous illumination has impact for photo-electronic directly reading, reading can be caused to be forbidden or reading exception when direct sunlight; (3) photoelectric tube has certain light decay after working for a long time, will directly have influence on the correctness of photoelectric reading.Tongue tube induction reading then has tongue tube in installation process easily to break and the problem be not easily found of breaking.
Summary of the invention
Goal of the invention of the present invention is to overcome the problem that being subject to of adopting photo-electronic directly reading mode the to cause installation process tongue tube that ambient light conditions impact or tongue tube induction reading mode cause easily breaks, a kind of angle rotated by measuring character wheel is adopted to obtain the direct access mode of character wheel reading: for prior art Problems existing, to provide a kind of.
To achieve these goals, the technical solution used in the present invention is:
The shaftless character wheel direct-reading device of a kind of magnetic strength, comprises,
Character wheel, described character wheel comprises character wheel body, the circumferential edges of a side of described character wheel body is evenly equipped with a circle stepping and dashes forward tooth; Be provided with the hollow cylinder vertical with described character wheel body in the middle part of described character wheel body, described hollow cylinder cross section is coaxial with described character wheel body, and described hollow cylinder length is greater than the thickness of described character wheel body and stretches out to described character wheel body both sides; A circular magnet steel is coaxially fixedly installed in described hollow cylinder;
Base plate, described base plate is symmetrically arranged with bracing frame one and bracing frame two, and support frame as described above one and bracing frame two are provided with the semi-circular recesses agreed with mutually with described hollow cylinder; Described semi-circular recesses is for placing described hollow cylinder;
Angle detection unit, is positioned at the outside of support frame as described above one or bracing frame two, and be arranged in parallel with described character wheel body, for when described circular magnet steel rotates with described character wheel, obtains the angle of described character wheel rotation according to the changes of magnetic field of described circular magnet steel.
Further, described angle detection unit comprises,
Angular transducer, for obtaining the angle that described character wheel rotates according to the changes of magnetic field of described circular magnet steel;
Collection plate, for installing described angular transducer and the output signal of described angular transducer being spread out of.
Further, described angle detection unit is also provided with magnetic shielding cover away from the side of described character wheel; The work of described magnetic shielding cover for preventing the magnetic force away from described character wheel side from disturbing described angle detection unit.
Further, described circular magnet steel is disc magnet steel or circular magnetic steel.
Further, described circular magnet steel is the cylindrical magnet steel of bipolarity radial magnetizing.
Described hollow cylinder diameter of section is 9.02mm to 9.06mm
Further, the circumference side of character wheel body is divided into 0 ~ 90 digit position.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
The anglec of rotation of character wheel is obtained by the anglec of rotation measuring the magnet steel being coaxially arranged on character wheel center, when avoiding the photoelectric tube easily occurred when adopting photo-electronic directly reading mode to damage a pair or several, occur that error code self cannot judge that error in reading and photo-electronic directly reading are subject to ambient light according to variable effect problem; The precision of mode to character wheel reading of the induction character wheel anglec of rotation that the present invention simultaneously adopts is higher, and the life-span is longer, and performance is more stable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the stereographic map of character wheel in the embodiment of the present invention.
Fig. 3 is the front elevation of character wheel in the embodiment of the present invention.
Fig. 4 is the right view of Fig. 3.
Fig. 5 is angular transducer installation site schematic diagram on collection plate in described angle detection unit.
Mark in figure: 1-character wheel, 11-character wheel body, 12-hollow cylinder, the circular magnet steel of 13-, 14-stepping is dashed forward tooth, 2-base plate, 21-bracing frame one, 22-bracing frame two, 3-angle detection unit, 31-angular transducer, 32-collection plate.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
embodiment 1:as shown in Figures 1 to 5, goal of the invention of the present invention is to overcome the problem that being subject to of adopting photo-electronic directly reading mode the to cause installation process tongue tube that ambient light conditions impact or tongue tube induction reading mode cause easily breaks, a kind of angle rotated by measuring character wheel is adopted to obtain the direct access mode of character wheel reading: for prior art Problems existing, to provide a kind of.
To achieve these goals, the technical solution used in the present invention is:
The shaftless character wheel direct-reading device of a kind of magnetic strength, comprises,
Character wheel 1, described character wheel 1 comprises character wheel body 11, the circumferential edges of a side of described character wheel body 11 is evenly equipped with a circle stepping and dashes forward tooth 14, and described stepping tooth 14 of dashing forward makes described character wheel rotate for receiving the outside power that transmits; The hollow cylinder 12 vertical with described character wheel body is provided with in the middle part of described character wheel body 11, described hollow cylinder 12 cross section is coaxial with described character wheel body 11, and described hollow cylinder 12 length is greater than the thickness of described character wheel body 11 and stretches out to described character wheel body 11 both sides; A circular magnet steel 13 is coaxially fixedly installed in described hollow cylinder 12;
Base plate 2, described base plate is symmetrically arranged with bracing frame 1 and bracing frame 2 22, and support frame as described above 1 and bracing frame 2 22 are provided with the semi-circular recesses agreed with mutually with described hollow cylinder 12 size, shape; Described semi-circular recesses places described hollow cylinder 12, can rotate to make described character wheel 1 under the support of described hollow cylinder 12; The setting of this semi-circular recesses, facilitates the assembling of this device, is directly placed on semi-circular recesses by character wheel during assembling, and as character wheel fixed, the support that only need arrange shape more identical above described base plate 2 covers.
Angle detection unit 3, be positioned at the outside of support frame as described above 1 or bracing frame 2 22, and be arranged in parallel with described character wheel body 11, for when described circular magnet steel 13 rotates with described character wheel 1, obtain the angle of described character wheel 1 rotation according to the changes of magnetic field of described circular magnet steel 13.
Further, described angle detection unit 3 comprises,
Angular transducer 31(is also known as magnetic coder), for obtaining the angle that described character wheel 1 rotates according to the changes of magnetic field of described circular magnet steel 13, in the present embodiment, adopt chip MMA253F;
Collection plate 32, for installing described angular transducer 31 and the output signal of described angular transducer 31 being spread out of.In the present embodiment, conveniently install, described angular transducer 31 is arranged on collection plate 32, and described collection plate 32 can be plugged on the circuit board at processor (the described processor angle conversion of being responsible for being rotated by each character wheel is numeral and output display) place.And in other embodiment, also collection plate can be fixed on outside support frame as described above 1 or bracing frame 2 22 or be fixed on described base plate 2, as long as described collection plate is connected with described processor (multiple connected mode can be had).
Further, described angle detection unit 3 is also provided with magnetic shielding cover away from the side of described character wheel 1; The work of described magnetic shielding cover (because of hiding relation, not showing in figure) for preventing the magnetic force away from described character wheel 1 side from disturbing described angle detection unit 3, for Fig. 1, described magnetic shielding cover should be arranged on the left side of angle detection unit 3 described in Fig. 1.
Further, described circular magnet steel 13 is disc magnet steel or circular magnetic steel.
Further, described circular magnet steel 13 is the cylindrical magnet steel of bipolarity radial magnetizing.
Described hollow cylinder 12 diameter of section is 9.04mm.
Further, the circumference side of character wheel body 11 is divided into 0 ~ 90 digit position, namely each digit position takies character wheel circumference 36 degree of radian sizes, in fact, display label or do not show label can be selected in each position, does not show label and refers to, only to determine in ten positions divided equally that one is after 0, according to character wheel choosing dress direction order determine each digit position, but not by numerical reference on character wheel.
During use, described character wheel 1 by described stepping dash forward tooth 14 accept rotating force rotate, described angular transducer 31, when described character wheel 1 rotates, rotates with character wheel according to described circular magnet steel 13() changes of magnetic field obtain the angle that described character wheel 1 rotates, thus obtain the current reading of described character wheel 1; Because the angle sensing sensitivity of angular transducer 31 to circular magnet steel 13 is high, the rotation once of described circular magnet steel 13 can be recorded in theory, and in fact on character wheel ten numerals be corresponding 36 degree of radians, therefore adopt character wheel provided by the invention, the measurement result that precision is higher can be provided.
It should be noted, the shape of the collection plate 32 in Fig. 5 is only example, does not represent any restriction in shape.
Identical with the character wheel direct-reading device in most prior art, the part in the device of character wheel direct-reading described in the present embodiment except described circular magnet steel makes by not possessing ferromagnetic material, e.g., can be but be not limited to plastics.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the shaftless character wheel direct-reading device of magnetic strength, is characterized in that, comprise,
Character wheel, described character wheel comprises character wheel body, the circumferential edges of a side of described character wheel body is evenly equipped with a circle stepping and dashes forward tooth; Be provided with the hollow cylinder vertical with described character wheel body in the middle part of described character wheel body, described hollow cylinder cross section is coaxial with described character wheel body, and described hollow cylinder length is greater than the thickness of described character wheel body and stretches out to described character wheel body both sides; A circular magnet steel is coaxially fixedly installed in described hollow cylinder;
Base plate, described base plate is symmetrically arranged with bracing frame one and bracing frame two, and support frame as described above one and bracing frame two are provided with the semi-circular recesses agreed with mutually with described hollow cylinder; Described semi-circular recesses is for placing described hollow cylinder;
Angle detection unit, is positioned at the outside of support frame as described above one or bracing frame two, and be arranged in parallel with described character wheel body, for when described circular magnet steel rotates with described character wheel, obtains the angle of described character wheel rotation according to the changes of magnetic field of described circular magnet steel.
2. the shaftless character wheel direct-reading device of magnetic strength as claimed in claim 1, it is characterized in that, described angle detection unit comprises,
Angular transducer, for obtaining the angle that described character wheel rotates according to the changes of magnetic field of described circular magnet steel;
Collection plate, for installing described angular transducer and the output signal of described angular transducer being spread out of.
3. the shaftless character wheel direct-reading device of magnetic strength as claimed in claim 1, it is characterized in that, described angle detection unit is also provided with magnetic shielding cover away from the side of described character wheel; The work of described magnetic shielding cover for preventing the magnetic force away from described character wheel side from disturbing described angle detection unit.
4. the shaftless character wheel direct-reading device of magnetic strength as claimed in claim 1, it is characterized in that, described circular magnet steel is disc magnet steel or circular magnetic steel.
5. the shaftless character wheel direct-reading device of magnetic strength as claimed in claim 1, it is characterized in that, described circular magnet steel is the cylindrical magnet steel of bipolarity radial magnetizing.
6. the shaftless character wheel direct-reading device of magnetic strength as claimed in claim 1, it is characterized in that, described hollow cylinder diameter of section is 9.02mm to 9.06mm.
7. the shaftless character wheel direct-reading device of magnetic strength as claimed in claim 1, is characterized in that, the circumference side of character wheel body is divided into 0 ~ 90 digit position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510365410.0A CN104949727A (en) | 2015-06-29 | 2015-06-29 | Magnetic induction shaftless character wheel direct reading device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510365410.0A CN104949727A (en) | 2015-06-29 | 2015-06-29 | Magnetic induction shaftless character wheel direct reading device |
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| CN104949727A true CN104949727A (en) | 2015-09-30 |
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| CN201510365410.0A Pending CN104949727A (en) | 2015-06-29 | 2015-06-29 | Magnetic induction shaftless character wheel direct reading device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5675964A (en) * | 1993-04-27 | 1997-10-14 | Fritz Stahlecker | Open end spinning supporting disk with asymmetric magnetic rotational speed indicator |
| CN102628703A (en) * | 2012-03-01 | 2012-08-08 | 陈健 | Electronic direct reading counter of meter |
| CN202748077U (en) * | 2012-06-08 | 2013-02-20 | 陈健 | Reading character wheel of measuring instrument |
| CN204694311U (en) * | 2015-06-29 | 2015-10-07 | 成都千嘉科技有限公司 | The shaftless character wheel direct-reading device of a kind of magnetic strength |
-
2015
- 2015-06-29 CN CN201510365410.0A patent/CN104949727A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5675964A (en) * | 1993-04-27 | 1997-10-14 | Fritz Stahlecker | Open end spinning supporting disk with asymmetric magnetic rotational speed indicator |
| CN102628703A (en) * | 2012-03-01 | 2012-08-08 | 陈健 | Electronic direct reading counter of meter |
| CN202748077U (en) * | 2012-06-08 | 2013-02-20 | 陈健 | Reading character wheel of measuring instrument |
| CN204694311U (en) * | 2015-06-29 | 2015-10-07 | 成都千嘉科技有限公司 | The shaftless character wheel direct-reading device of a kind of magnetic strength |
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Application publication date: 20150930 |
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