CN104048683A - Remote transmission meter capable of judging position of character wheel based on electronic compass - Google Patents
Remote transmission meter capable of judging position of character wheel based on electronic compass Download PDFInfo
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- CN104048683A CN104048683A CN201410248122.2A CN201410248122A CN104048683A CN 104048683 A CN104048683 A CN 104048683A CN 201410248122 A CN201410248122 A CN 201410248122A CN 104048683 A CN104048683 A CN 104048683A
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- CN
- China
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- character wheel
- electronic compass
- magnetic steel
- annular magnetic
- collection plate
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Abstract
The invention relates to a remote transmission meter capable of judging the position of a character wheel based on an electronic compass. The remote transmission meter comprises a character wheel box (1) and a collection panel assembly (4). The character wheel box (1) is provided with a character wheel shaft (2). The character wheel shaft (2) is provided with the character wheel (3). The character wheel (3) is provided with annular magnetic steel (3.1). According to the remote transmission meter capable of judging the position of the character wheel based on the electronic compass, the annular magnetic steel and the electronic compass are not in mechanical contact, so mechanical wear of a resistive transducer can be eliminated; meanwhile, the annular magnetic steel and a circuit part are both mounted in the character wheel box in a sealed mode and are almost not influenced by damp, so the unsafe factors that the annular magnetic steel is affected with damp, demagnetized and damaged after long-term operation are avoided; besides, due to the fact that the rotating angle is calculated according to the change of a magnetic field, bubbles in water are not affected at all with respect to the magnetic field.
Description
Technical field
The present invention relates to a kind of telemetering meter, belong to counting mechanism technical field.
Background technology
Current long-range table industry is for judging that the mode of character wheel position mainly contains following three kinds:
1, resistance-type
The position that Main Basis character wheel contacts with resistive band in rotation process changes, thereby the position of current character wheel is judged in resistance change according to resistance size.Its technology comparative maturity, assembling is simple, but precision is lower, simultaneously owing to there being mechanical friction, can cause resistance to lose efficacy or jump after working long hours.
2, colour coding formula
Coat different colors in the zones of different of character wheel, after being identified by Chromatic sensor, determine current location.What it still needed solution is after long-term work, due to water meter heavy with moistures, can cause code-disc color to come off, desalinate, thereby impact identification is read.
3, photo-electric
On character wheel, open the window of getting different sizes, in character wheel rotation process, what the meeting that the light of photoelectric tube transmitting has was received, has is blocked, thereby produces different electric signal, just can determine the position of current character wheel according to the difference of electric signal.But all can exert an influence to photoelectric tube emission of light owing to being subject to the peripheral underwater bubble of extraneous light and character wheel box, thereby cause character wheel location determination mistake.
Summary of the invention
The object of the invention is to overcome above deficiency, a kind of telemetering meter is provided, this telemetering meter judges character wheel position by electronic compass, has overcome the shortcoming of existing three kinds of sensing modes.
The object of the present invention is achieved like this:
A kind of telemetering meter that judges character wheel position based on electronic compass, comprise character wheel box, on affiliated character wheel box, be provided with print wheel shaft, on print wheel shaft, be evenly provided with side by side character wheel, be characterized in: described telemetering meter also comprises the collection plate assembly corresponding with each character wheel, described collection plate assembly is arranged on character wheel box, collection plate assembly comprises collection plate, wiring board and electronic compass, described electronic compass setting in the circuit board, wiring board is connected with collection plate, on described character wheel, be provided with annular magnetic steel, described electronic compass is corresponding with the annular magnetic steel of character wheel.
A kind of telemetering meter that judges character wheel position based on electronic compass of the present invention, the cylindrical side of its each character wheel is evenly divided into ten deciles, and corresponding respectively by ten numerals of 0-9.
Compared with prior art, the invention has the beneficial effects as follows:
A kind of telemetering meter that judges character wheel position based on electronic compass of the present invention, owing to there is no Mechanical Contact between annular magnetic steel and electronic compass, so can stop the problem of resistance sensor mechanical wear; Simultaneously annular magnetic steel itself and circuit part all seal and are arranged in character wheel box, are subject to hardly the impact of moisture, avoid the make moist disturbance factor of demagnetization damage of annular magnetic steel after long-time running; Simultaneously, owing to being that rotational angle is calculated in variation according to magnetic field, so the bubble in water is not also affected for magnetic field, therefore the present invention has overcome the shortcoming of existing three kinds of sensing modes.
Brief description of the drawings
Fig. 1 is a kind of structural representation that judges the telemetering meter of character wheel position based on electronic compass of the present invention.
Fig. 2 is the stereographic map of character wheel of the present invention.
Fig. 3 is the front view of character wheel of the present invention.
Fig. 4 is that the A-A of Fig. 3 is to sectional view.
Fig. 5 is the structural representation of collection plate assembly of the present invention.
Fig. 6 is electronic compass schematic diagram.
Fig. 7 is bidirectional analog selector switch schematic diagram.
Fig. 8 is the relation of magnetic field and inductance.
Fig. 9 is Software for Design flow process.
Figure 10 is test result.
In figure:
Character wheel box 1,
Print wheel shaft 2,
Character wheel 3,
Annular magnetic steel 3.1,
Collection plate assembly 4,
Collection plate 4.1,
Wiring board 4.2,
Electronic compass 4.3.
Embodiment
Referring to Fig. 1-5, the present invention relates to a kind of telemetering meter that judges character wheel position based on electronic compass, it comprises character wheel box 1 and collection plate assembly 4, the top of described character wheel box 1 is provided with four grooves, on described character wheel box 1, be provided with print wheel shaft 2, on print wheel shaft 2, be provided with four character wheels 3, four character wheels 3 represent respectively a position, ten, hundred, kilobit, in the form of annular discs and the one bottom surface of described character wheel 3 is provided with annular magnetic steel 3.1, cylindrical side one circle of character wheel 3 is divided into ten deciles, represent with 0-9 respectively, described collection plate assembly 4 is arranged on character wheel box 1, collection plate assembly 4 comprises collection plate 4.1, wiring board 4.2 and electronic compass 4.3, described electronic compass 4.3 has four and be separately positioned on four wiring boards 4.2, four wiring boards 4.2 insert respectively in four grooves, four wiring boards 4.2 are all connected with a collection plate 4.1, described four electronic compasss 4.3 are corresponding with the annular magnetic steel 3.1 of four character wheels 3 respectively.Electronic compass 4.3 is connected with collection plate 4.1 by wiring board 4.2, and in the time that character wheel rotates, electronic compass 4.3 will calculate the indexing of current annular magnet steel 3.1 and information is passed to CPU and calculate storage, completes the judgement to field current location.
Principle of work:
Electronic compass utilizes Magnetic Sensor induced field to realize direction finding location, in electronic compass, records the horizontal component H in magnetic field by magnetic field probe
xwith vertical component H
y, try to achieve magnetic azinuth θ=arctan (H by calculating
y/ H
x).Can measure magnetic azimuth θ=arctan (H by being converted into the method for measured frequency
y/ H
x)=f
y/ f
xas long as, measure the oscillation frequency of two vertical direction Magnetic Sensors, just can measure position angle.
Terrestrial magnetic field Orthogonal Decomposition becomes H
x, H
ytwo components.Two Magnetic Sensors are vertically placed, and wherein Yi road circuit theory diagrams are as Fig. 1, and another road in like manner.Mainly use and door, resistance, PNI, hysteresis loop comparator, single-chip microcomputer.Bidirectional analog selector switch as shown in Figure 7, in the time that A is high level, B, C path, otherwise, B, C short circuit.For hysteresis loop comparator, in the time that input voltage changes, cause that output voltage produces transition.
First will set low level with door, then one of them is set high to level with door port A with single-chip microcomputer, after bidirectional analog selector switch gating, E is low level, hysteresis loop comparator output high level, at this moment port B is high level, so with door port C output high level, inductance PNI charging. in the time reaching certain magnitude of voltage, hysteresis loop comparator upset, output low level, with door port C output low level, inductance PNI discharges so, and this process repeats, forming RL oscillatory circuit. another one and goalkeeper are reverse charge and discharge process, and its principle of work is identical.
In forward charge and discharge process, terrestrial magnetic field and inductance relation are as Fig. 8, and establishing total magnetic intensity is H, and geomagnetic field intensity is H
o, the magnetic field intensity that self-induction produces is H
,, H=H
ocos θ+H
,.In reverse charge and discharge process, H=H
ocos θ-H
,.
Frequency f
xh is directly proportional to magnetic field intensity, and establishing forward, to discharge and recharge oscillation frequency be f
1, oppositely discharging and recharging oscillation frequency is f
2, due to H
,relevant with the charging current changing, can cause uncertainty, eliminate this impact.Total frequency f
x=f
1+ f
2(magnetic field that self-induction produces is greater than fixed magnetic field component).
Measure the oscillation frequency of two groups of orthogonal PNI by the Interruption system of single-chip microcomputer, utilize formula θ=arctan (H
y/ H
x)=f
y/ f
xjust can obtain magnetic azimuth.
Described character wheel (3) is evenly divided ten deciles by 0～90 numeral, in the time that rotating, character wheel can determine by electronic compass (4.3) angle of its rotation, just can know which position of current character wheel in 0～9 these ten numerals by angle, thereby obtain the reading of current water meter.
Owing to there is no Mechanical Contact between annular magnetic steel 3.1 and electronic compass 4.3, so can stop the problem of resistance sensor mechanical wear; Simultaneously annular magnetic steel 3.1 itself and circuit part all seal and are arranged in character wheel box 1, are subject to hardly the impact of moisture, avoid annular magnetic steel 3.1 after long-time running to make moist disturbance factor that demagnetization damages; Simultaneously owing to being that rotational angle is calculated in variation according to magnetic field, so the bubble in water is not also affected for magnetic field.
Claims (2)
1. one kind judges the telemetering meter of character wheel position based on electronic compass, comprise character wheel box (1), on affiliated character wheel box (1), be provided with print wheel shaft (2), on print wheel shaft (2), be evenly provided with side by side character wheel (3), it is characterized in that: described telemetering meter also comprises the collection plate assembly (4) corresponding with each character wheel (3), described collection plate assembly (4) is arranged on character wheel box (1), collection plate assembly (4) comprises collection plate (4.1), wiring board (4.2) and electronic compass (4.3), described electronic compass (4.3) is arranged on wiring board (4.2), wiring board (4.2) is connected with collection plate (4.1), on described character wheel (3), be provided with annular magnetic steel (3.1), described electronic compass (4.3) is corresponding with the annular magnetic steel (3.1) of character wheel (3).
2. a kind of telemetering meter that judges character wheel position based on electronic compass according to claim 1, is characterized in that: the cylindrical side of described each character wheel (3) is evenly divided into ten deciles, and corresponding respectively by ten numerals of 0-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248122.2A CN104048683A (en) | 2014-06-06 | 2014-06-06 | Remote transmission meter capable of judging position of character wheel based on electronic compass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248122.2A CN104048683A (en) | 2014-06-06 | 2014-06-06 | Remote transmission meter capable of judging position of character wheel based on electronic compass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104048683A true CN104048683A (en) | 2014-09-17 |
Family
ID=51501838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410248122.2A Pending CN104048683A (en) | 2014-06-06 | 2014-06-06 | Remote transmission meter capable of judging position of character wheel based on electronic compass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104048683A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356201A (en) * | 2017-07-07 | 2017-11-17 | 杭州山科智能科技股份有限公司 | One kind shooting water meter character wheel coordinate acquiring method and device |
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| CN201348526Y (en) * | 2008-12-31 | 2009-11-18 | 连云港连利水表有限公司 | Rear-mounted remote transmission type water meter and rear-mounted remote transmission device housing |
| CN101988836A (en) * | 2010-11-05 | 2011-03-23 | 岑腾云 | Magnetic coupling transmission fully-sealed counter and measuring instrument with same |
| CN102607661A (en) * | 2012-03-30 | 2012-07-25 | 陈健 | Electronic direct-reading counter for wet type water meter |
| CN102809398A (en) * | 2012-08-23 | 2012-12-05 | 苏州自来水表业有限公司 | Vacuum wet type photoelectric direct reading remote transmission water meter |
| US8547428B1 (en) * | 2006-11-02 | 2013-10-01 | SeeScan, Inc. | Pipe mapping system |
| CN203929089U (en) * | 2014-06-06 | 2014-11-05 | 江阴市立信智能设备有限公司 | Judge the telemetering meter of character wheel position based on electronic compass |
-
2014
- 2014-06-06 CN CN201410248122.2A patent/CN104048683A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8547428B1 (en) * | 2006-11-02 | 2013-10-01 | SeeScan, Inc. | Pipe mapping system |
| CN201348526Y (en) * | 2008-12-31 | 2009-11-18 | 连云港连利水表有限公司 | Rear-mounted remote transmission type water meter and rear-mounted remote transmission device housing |
| CN101988836A (en) * | 2010-11-05 | 2011-03-23 | 岑腾云 | Magnetic coupling transmission fully-sealed counter and measuring instrument with same |
| CN102607661A (en) * | 2012-03-30 | 2012-07-25 | 陈健 | Electronic direct-reading counter for wet type water meter |
| CN102809398A (en) * | 2012-08-23 | 2012-12-05 | 苏州自来水表业有限公司 | Vacuum wet type photoelectric direct reading remote transmission water meter |
| CN203929089U (en) * | 2014-06-06 | 2014-11-05 | 江阴市立信智能设备有限公司 | Judge the telemetering meter of character wheel position based on electronic compass |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356201A (en) * | 2017-07-07 | 2017-11-17 | 杭州山科智能科技股份有限公司 | One kind shooting water meter character wheel coordinate acquiring method and device |
| CN107356201B (en) * | 2017-07-07 | 2019-11-08 | 杭州山科智能科技股份有限公司 | A kind of camera shooting water meter character wheel coordinate acquiring method and device |
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Application publication date: 20140917 |