CN110569955B - Character wheel position judgment and counting device based on capacitance and metering instrument - Google Patents
Character wheel position judgment and counting device based on capacitance and metering instrument Download PDFInfo
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- CN110569955B CN110569955B CN201810569085.3A CN201810569085A CN110569955B CN 110569955 B CN110569955 B CN 110569955B CN 201810569085 A CN201810569085 A CN 201810569085A CN 110569955 B CN110569955 B CN 110569955B
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- 239000002184 metal Substances 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
- 230000005856 abnormality Effects 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- SLXKOJJOQWFEFD-UHFFFAOYSA-N 6-aminohexanoic acid Chemical compound NCCCCCC(O)=O SLXKOJJOQWFEFD-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008521 reorganization Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D7/00—Indicating measured values
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/27—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention relates to the technical field of metering and counting, in particular to a character wheel position judging and counting device based on capacitance and a metering instrument. The counting device comprises a counter and a controller electrically connected with the counter, wherein the counter comprises a counter frame and a character wheel arranged on the counter frame, the counting device further comprises a signal plate arranged on the counter frame, the signal plate is correspondingly arranged with the character wheel, a first conducting strip is arranged on the character wheel, a second conducting strip is arranged on the opposite side of the signal plate to the character wheel, and the second conducting strip is electrically connected with the controller. The metering device is provided with the counting device. The position of the character wheel is judged by polling the capacitance capacity condition of each conducting strip and the difference state of the capacities in the rotating process of the character wheel, and the mode is not interfered by magnetic fields and light rays. The air between the gaps of the metal conducting plates is used as a medium, so that no extra device is arranged, the probability of counter abnormality caused by device faults is reduced, and meanwhile, the cost of equipment can be greatly reduced.
Description
Technical Field
The invention relates to the technical field of metering and counting, in particular to a character wheel position judgment and counting device based on capacitance and a metering instrument using the same.
Background
The counting technology is an important technology for realizing the acquisition and utilization of metering data. In the field of metering devices, direct-reading technology is widely applied due to the characteristic of absolute metering. In addition, the method comprises the following steps. The direct reading technology also has the characteristics of saving energy consumption and no need of storing accumulated quantity. The direct reading technology is the most representative of photoelectric direct reading technology, and is widely applied to the data technology of water meters and gas meters.
The current photoelectric direct reading mode is to form a signal measuring loop by arranging a plurality of arc slotted holes with different sizes on the character wheel, arranging circuit boards in parallel on two sides of the character wheel and arranging photosensitive devices and luminous sources on the circuit boards, and determining the absolute position of the character wheel by utilizing a plurality of groups of photoelectric combinations to form codes according to the light shielding characteristics caused by the rotation of the character wheel.
Because the number of the character wheel of the direct-reading counter needs to be directly read, the character wheel cannot be shielded, when external light is interfered, the light emitted by the photosensitive device can be influenced, the metering signal is interfered, false alarm can occur, and the reading is abnormal. In the use process, characteristic degradation can occur after the photoelectric device is used for a long time, external water vapor and oil gas are easy to adhere to the surface of the photoelectric device to cause polarization and refraction phenomena, and abnormal reading is caused. Meanwhile, the photoelectric direct-reading counter is realized in a coding mode due to the judging mode, so that tens of pairs or even tens of pairs of photoelectric devices are needed to complete the coding process, and the cost is high.
Disclosure of Invention
The invention provides a character wheel position judging and counting device based on capacitance and a metering device using the same, which are used for reducing or solving the technical problems and disadvantages.
The invention provides a character wheel position judging and counting device based on capacitance, which comprises a counter and a controller electrically connected with the counter, wherein the counter comprises a counter frame and a character wheel arranged on the counter frame, the counting device also comprises a signal plate arranged on the counter frame, the signal plate is correspondingly arranged with the character wheel, a first conducting strip is arranged on the character wheel, a second conducting strip is arranged on the opposite side of the signal plate to the character wheel, and the second conducting strip is electrically connected with the controller.
According to a further scheme, ten numbers of 0-9 are marked on the character wheel, the number of the second conductive sheets is ten, and the ten second conductive sheets are correspondingly arranged with the ten numbers on the character wheel.
Further, reference source plates are further arranged on the signal plate, the reference source plates are annular, and the second conductive plates are distributed on the periphery of the reference source plates at equal intervals.
In a further scheme, the projection of the first conducting strip on the signal board, the second conducting strip and the reference source strip are all provided with overlapping areas.
Further, the width H of the first conductive sheet is smaller than or equal to the minimum width H of the second conductive sheet.
Further, the character wheel is arranged in parallel with the signal board.
Further, the counter frame is provided with a character wheel shaft, the character wheel shaft penetrates through the character wheel and the signal board, and the character wheel and the reference source sheet are coaxially arranged.
Further, the first conductive sheet is a conductive metal sheet embedded on the character wheel or a conductive layer sprayed on the character wheel.
Further, the second conductive sheet is a metal pad layer arranged on the signal board, and the reference source sheet is a metal pad layer arranged on the signal board.
The invention also provides a metering instrument, which comprises a base table, wherein the base table is provided with the character wheel position judging and counting device based on the capacitance in all the technical schemes.
After the technical scheme is adopted, the invention has the following advantages:
1. The utility model provides a word wheel position judgement counting assembly based on electric capacity, includes counter and the controller of being connected with the counter electricity, the counter includes counter frame and sets up the word wheel on the counter frame, and this counting assembly still includes the signal board of setting on the counter frame, the signal board corresponds the setting with the word wheel, be equipped with first conducting strip on the word wheel, the opposite side of signal board and word wheel is equipped with the second conducting strip, the second conducting strip is connected with the controller electricity, first conducting strip and second conducting strip are formed with two polar plates, and medium (air) between them forms the condenser with them, and the word wheel rotates the in-process through the capacitance capacity condition of polling each conducting strip, judges the position of word wheel through the differential state of capacity, because accomplish in very short time when sampling each time, consequently can effectively get rid of the error that device self characteristic decay leads to, and this kind of mode does not receive magnetic field, light interference. The air between the gaps of the metal conducting plates is used as a medium, so that no extra device is arranged, the probability of counter abnormality caused by device faults is reduced, and meanwhile, the cost of equipment can be greatly reduced.
2. The signal board is also provided with reference source sheets which are annular, and the second conductive sheets are distributed at equal intervals on the periphery of the reference source sheets. The reference source sheet is set so that a minute reference capacitance value is formed between the reference source sheet and each second conductive sheet, and when the reference source sheet and the first conductive sheet form a capacitance, a good judgment can be made.
3. And the projection of the first conducting strip on the signal board and the second conducting strip and the reference source strip are provided with overlapping areas. The width H of the first conductive sheet is smaller than or equal to the minimum width H of the second conductive sheet. The capacitance between the first conductive sheet and the reference source sheet is ensured, and the capacitance between the first conductive sheet and the second conductive sheet is ensured. The width H of the first conductive sheet is less than or equal to the minimum width H of the second conductive sheet. The situation that the width of the first conductive sheet is overlarge to continuously cover the whole second conductive sheet and then span the adjacent second conductive sheet to influence the capacitance judgment is avoided.
4. The character wheel with signal board parallel arrangement be equipped with the character wheel axle on the counter frame, the character wheel axle runs through character wheel and signal board, just the coaxial corresponding setting of character wheel and benchmark source piece. The optimal design of the position ensures the parallel performance of two polar plates serving as the capacitor, and improves the reliability of capacitance metering judgment.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic perspective view (in section) of a character wheel position judgment and counting device based on capacitance according to the scheme of the invention;
FIG. 2 is an exploded view of the portion A of FIG. 1 in a partially enlarged manner in accordance with the present invention;
FIG. 3 is a schematic side view of a print wheel with a first conductive sheet in accordance with aspects of the present invention;
FIG. 4 is a schematic side view of a signal board according to the present invention;
FIG. 5 is a schematic diagram showing the side view positional relationship of the character wheel and the signal board according to the scheme of the invention;
Fig. 6 is a schematic diagram of a position relationship of a sampling polling direction according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In addition to the above preferred embodiments, the present invention has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention, which is defined in the appended claims.
As shown in fig. 1 to 4, the invention provides a character wheel position judging and counting device based on capacitance, which comprises a counter and a controller electrically connected with the counter, wherein the controller adopts an independent integrated MCU control chip in the embodiment, and specific chips can adopt two series of MSP430FR2633, MSP430FR2632, MSP430FR2533, MSP430FR2532, MSP430FR263x and MSP430FR253x, and the two series of chips are respectively provided with a function of reading and comparing capacitance signals so as to realize capacitance value conversion and judgment. The counter comprises a counter frame 1 and a character wheel 11 arranged on the counter frame 1, and the counter also comprises a signal board 12 arranged on the counter frame 1, wherein the signal board 12 can be a PCB (printed circuit board) or other boards for identifying the rotation of the character wheel. The signal board 12 corresponds the setting with the character wheel 11, be provided with first conducting strip 111 on the character wheel 11, signal board 12 and the opposite side of character wheel 11 are equipped with second conducting strip 121, the character wheel 11 with signal board 12 parallel arrangement, second conducting strip 121 is connected with the controller electricity, and the controller can be for setting up on the signal board, also can set up on the strapping table main control board 13, and the controller sets up on main control board 13 in this embodiment.
As shown in fig. 3, the number of the character wheel 11 is ten and the number of the second conductive sheets 121 is ten, and the ten second conductive sheets are arranged corresponding to the ten numbers on the character wheel 11.
As shown in fig. 4, the signal board 12 is further provided with a reference source plate 122, the reference source plate 122 is in a ring shape, and the second conductive plates 121 are arranged at the periphery of the reference source plate 122 at equal intervals. As can be seen, the peripheral ring on which the second conductive sheet 121 is located is arranged concentrically with the reference source sheet 122.
As shown in fig. 5, the projection of the first conductive sheet 111 on the signal board 12 and the second conductive sheet 121 and the reference source sheet 122 have overlapping areas. The width H of the first conductive sheet 111 is less than or equal to the minimum width H of the second conductive sheet 121. It is ensured that a capacitance is formed between the first conductive sheet 111 and the reference source sheet 122, and that a capacitance is formed between one or both of the first conductive sheet and the 111 second conductive sheet 121. The width H of the first conductive sheet 111 is less than or equal to the minimum width H of any one of the second conductive sheets 121. The situation that the width of the first conductive sheet 111 is too large to continuously cover the whole second conductive sheet and then span the adjacent second conductive sheet to influence the capacitance judgment is avoided.
As shown in fig. 1-2, the counter frame 1 is provided with a wheel axle 14, the wheel axle 14 penetrates through the wheel 11 and the signal board 12, and the wheel 11 and the reference source plate 122 are coaxially and correspondingly arranged, that is, coaxially arranged with the ring where the second conductive plate 121 is located.
The first conductive sheet 111 is a conductive metal sheet embedded on the print wheel 11 or a conductive layer sprayed on the print wheel 11. Or other conductors having an area, i.e., conductive sheets that form the capacitive plates. The second conductive sheet 121 is a metal pad layer provided on the signal board 12, and the reference source sheet 122 is a metal pad layer provided on the signal board 12. The first conductive sheet 111 and the second conductive sheet 121 may have a triangular shape, a rectangular shape, a circular shape or an elliptical shape, or a square shape.
In particular, the counting device starts to operate, the character wheel 11 rotates, i.e. corresponds to the rotor, and the signal plate 12 is stationary, i.e. corresponds to the stator. Each of the second conductive strips 121 leads out a wire to the controller, with an intermediate reference source strip 122, any of the second conductive strips 121 being connected to the controller. Taking the conductive sheet corresponding to the number 6 as an example, any one of the second conductive sheets 121 and the reference source sheet 122 can form a capacitor, and after being electrified, the capacitor has a tiny capacitance.
In the process of rotating the print wheel 11, as shown in fig. 5, the reference source plate 122 and one of the first conductive plate 111 and the second conductive plate 121 together constitute one capacitor combination. Since the signal plates 12 are arranged parallel to the print wheel 11 and at a relatively close distance, they and the air medium in between form a capacitor. The reference source plate 122 and the second conductive plate 121 are loaded with voltage, one or two of the reference source plate 122 and the second conductive plate 121 and the capacitor formed by the first conductive plate 111 enter a charged state, a certain amount of energy is stored, the first conductive plate 111 rotates to which position, when the positive area of the capacitor plate increases according to the calculation formula of the capacitor, the capacitance value C=epsilon S/d=epsilon S/4 pi kd, the capacitance value of the capacitor plate correspondingly increases, the number can be judged to be positioned on which number or closest to the number according to the existence or the size of the capacitance value, when the capacitance value of the plate between adjacent numbers is the capacitance value, the overlapping area of the adjacent plates can be judged to be larger by comparing the capacitance value (because the capacitance value is proportional to the positive area of the plate), and then the number is judged to be closest to which number, and the number is closest to be taken as a judgment value. And then the controller performs rated energy deduction, and confirms the current capacity value of the reorganization position through the time of charge quantity deduction, wherein the realization and judgment of the function are completed by the internal integrated circuit of the controller, namely the controller integrates the capacity value reading and comparing judgment function.
As shown in fig. 6, each time sampling is performed, a polling mode is adopted, and the polling of 10 second conductive sheets is completed by starting from the first second conductive sheet, and then the polling is arranged according to the acquired 10 capacity values and according to the quantity of the capacities. The position of the first conductive sheet 111 can be confirmed according to the magnitude of the capacitance. If there is a significant capacity of one or both of the second conductive sheets, this indicates that the first conductive sheet 111 is located between the two second conductive sheets 121. In this case, the bias condition is determined by comparing the capacity between the two. Because of the specific size limiting design of the first conductive sheet 111 and the second conductive sheet 121, the first conductive sheet and the more than two second conductive sheets will not have capacitance values, and therefore, analysis and redundant description are not needed.
Since the 10 second conductive plates are positioned absolutely, and the first conductive plate 111 is directly fixed to the wheel 11 in the same absolute position as the wheel, the current degree of the wheel can be determined by determining the absolute position of the conductive metal plates.
The invention also provides a metering instrument, which comprises a base table (not marked in the figure), wherein the base table is provided with the character wheel position judging and counting device based on the capacitance in all the technical schemes. The metering device can be a gas meter, a flowmeter, a water meter, an electric meter and other liquid flow measuring devices.
The counter comprises a counter frame 1 and a character wheel 11 arranged on the counter frame 1, the counter also comprises a signal plate 12 arranged on the counter frame 1, the signal plate 12 is arranged corresponding to the character wheel 11, the character wheel 11 is provided with a first conductive sheet 111, the opposite side of the signal plate 12 and the character wheel 11 is provided with a second conductive sheet 121, the second conductive sheet 121 is electrically connected with the controller, the first conductive sheet 111 and the second conductive sheet 121 are provided with two polar plates, a capacitor is formed between the first conductive sheet and the second conductive sheet, and a medium (air) between the first conductive sheet and the second conductive sheet forms a capacitor, and the position of the character wheel is judged through the capacitance capacity state of each conductive sheet in the process of rotating the character wheel. The air between the metal conducting strips is used as a medium, so that no extra device is arranged, the probability of counter abnormality caused by device faults is reduced, and meanwhile, the cost of equipment can be greatly reduced.
In addition to the above preferred embodiments, the present invention has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention, which is defined in the appended claims.
Claims (4)
1. The utility model provides a word wheel position judgement counting assembly based on electric capacity, includes the counter and with the controller of counter electricity connection, the counter includes counter frame and sets up the word wheel on counter frame, its characterized in that: the counter is characterized by further comprising a signal plate arranged on the counter support, the signal plate is arranged corresponding to the character wheel, a first conducting strip is arranged on the character wheel, a second conducting strip is arranged on the opposite side of the signal plate to the character wheel, the second conducting strip is electrically connected with the controller, the width H of the first conducting strip is smaller than or equal to the minimum width H of the second conducting strip, ten numbers of 0-9 are marked on the character wheel, ten second conducting strips are arranged corresponding to the ten numbers on the character wheel, a reference source strip is further arranged on the signal plate, the reference source strip is annular, the second conducting strips are distributed on the periphery of the reference source strip at equal intervals, the projection of the first conducting strip on the signal plate, the second conducting strip and the reference source strip are all provided with overlapping areas, the character wheel and the signal plate are arranged in parallel, a character wheel shaft is arranged on the counter support, the character wheel shaft penetrates through the character wheel and the signal plate, and the character wheel and the reference source strip is coaxial with the reference source strip.
2. The capacitance-based character wheel position determining and counting device according to claim 1, wherein the first conductive sheet is a conductive metal sheet embedded on the character wheel or a conductive layer sprayed on the character wheel.
3. The capacitance-based wheel position determination and counting device according to claim 1, wherein the second conductive sheet is a metal pad layer provided on the signal board, and the reference source sheet is a metal pad layer provided on the signal board.
4. A metering device comprising a base meter, wherein the base meter is provided with the capacitance-based character wheel position judgment and counting device according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810569085.3A CN110569955B (en) | 2018-06-05 | 2018-06-05 | Character wheel position judgment and counting device based on capacitance and metering instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810569085.3A CN110569955B (en) | 2018-06-05 | 2018-06-05 | Character wheel position judgment and counting device based on capacitance and metering instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110569955A CN110569955A (en) | 2019-12-13 |
| CN110569955B true CN110569955B (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810569085.3A Active CN110569955B (en) | 2018-06-05 | 2018-06-05 | Character wheel position judgment and counting device based on capacitance and metering instrument |
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| CN (1) | CN110569955B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5565861A (en) * | 1993-12-23 | 1996-10-15 | Gwf Gas-Und Wassermesserfabrik Ag | Multidigit counting wheel mechanism for a volume-measuring instrument |
| CN2326942Y (en) * | 1998-05-13 | 1999-06-30 | 李建平 | Capacitor type read water-meter |
| JP2003178283A (en) * | 2001-12-13 | 2003-06-27 | Mizukoshi Keiki Kk | Mechanical counter |
| CN1928899A (en) * | 2006-01-06 | 2007-03-14 | 宁波水表股份有限公司 | Mechanical counter for electromagnetic induction coding |
| CN103575352A (en) * | 2012-07-31 | 2014-02-12 | 上海兆富电子科技有限公司 | Device and method for quickly recognizing gear reading by capacitive transducer |
| CN106372716A (en) * | 2016-08-30 | 2017-02-01 | 浙江威星智能仪表股份有限公司 | Counter encoding extension method based on character wheel counting device |
| CN207351505U (en) * | 2017-10-16 | 2018-05-11 | 金卡智能集团股份有限公司 | A kind of intelligent gas meter samples counting structure |
| CN208460052U (en) * | 2018-06-05 | 2019-02-01 | 金卡智能集团股份有限公司 | A kind of character wheel position based on capacitance judges counting device and measuring instrument |
-
2018
- 2018-06-05 CN CN201810569085.3A patent/CN110569955B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5565861A (en) * | 1993-12-23 | 1996-10-15 | Gwf Gas-Und Wassermesserfabrik Ag | Multidigit counting wheel mechanism for a volume-measuring instrument |
| CN2326942Y (en) * | 1998-05-13 | 1999-06-30 | 李建平 | Capacitor type read water-meter |
| JP2003178283A (en) * | 2001-12-13 | 2003-06-27 | Mizukoshi Keiki Kk | Mechanical counter |
| CN1928899A (en) * | 2006-01-06 | 2007-03-14 | 宁波水表股份有限公司 | Mechanical counter for electromagnetic induction coding |
| CN103575352A (en) * | 2012-07-31 | 2014-02-12 | 上海兆富电子科技有限公司 | Device and method for quickly recognizing gear reading by capacitive transducer |
| CN106372716A (en) * | 2016-08-30 | 2017-02-01 | 浙江威星智能仪表股份有限公司 | Counter encoding extension method based on character wheel counting device |
| CN207351505U (en) * | 2017-10-16 | 2018-05-11 | 金卡智能集团股份有限公司 | A kind of intelligent gas meter samples counting structure |
| CN208460052U (en) * | 2018-06-05 | 2019-02-01 | 金卡智能集团股份有限公司 | A kind of character wheel position based on capacitance judges counting device and measuring instrument |
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| CN110569955A (en) | 2019-12-13 |
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