CN105424129A - Photoelectric direct-reading and remote-transmitting dry type water meter with good electromagnetic compatibility - Google Patents
Photoelectric direct-reading and remote-transmitting dry type water meter with good electromagnetic compatibility Download PDFInfo
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- CN105424129A CN105424129A CN201511002275.XA CN201511002275A CN105424129A CN 105424129 A CN105424129 A CN 105424129A CN 201511002275 A CN201511002275 A CN 201511002275A CN 105424129 A CN105424129 A CN 105424129A
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- shielding case
- water meter
- material layer
- screening shell
- reading
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a photoelectric direct-reading and remote-transmitting dry type water meter with good electromagnetic compatibility. Multiple round ventilation openings (3) are uniformly formed in an inner shielding case (1) and an outer shielding case (2), and the diameter of each round ventilation opening (3) is smaller than the wavelength threshold value of the preset electromagnetic wave; the inner shielding case (1) comprises a first release material layer (5), a first adhesive layer (6) and conductive fabric (7), and the conductive fabric (7) is arranged on one side close to a water meter module (4); the outer shielding case (2) comprises a second release material layer (8), a second adhesive layer (9) and insulating fabric (10), and the second release material layer (8) is arranged on one side close to the inner shielding case (1). On the basis that ventilation and heat dissipation performance is guaranteed, the outside electromagnetic waves are absorbed through the insulating fabric of the outer shielding case and cannot enter the water meter, the electromagnetic waves produced by the water meter module are reflected by the conductive fabric of the inner shielding case, the inner electromagnetic waves cannot be irradiated outwards, and the water meter has the good electromagnetic compatibility and shielding functions.
Description
Technical field
The present invention relates to a kind of photoelectric direct-reading water meter, particularly relate to the photo-electronic directly reading teletransmission dry-type meter that a kind of Electro Magnetic Compatibility is good.
Background technology
Photoelectric direct-reading water meter is the outer rim printing specific markers of the character wheel of counter printing 0-9 position at common water meter, at its peripheral fixed light electric transducer and interlock circuit.During externally fed meter reading, judge that specific markers " has " and the state of "None" by photoelectric sensor.Photoelectric direct reading remote transmission water meter passes through character wheel founding mathematical models, calculate through combination, therefrom obtain uniquely correct solution, and then specifically mark according to mathematical law printing on the relevant position of character wheel 0-9, around it, according to mathematical law, fixed light electric transducer is installed again, so just a mathematical problem is realized by electronic circuit method.Consider the algorithm of various fault-tolerant, error correction simultaneously, just can draw uniquely correct solution---the unique data namely on character wheel.The direct-reading gage adopted at present in this way mainly contains photoelectricity correlation (transmission) formula and photo-electric reflection type two kinds, and main difference is the difference of physical construction and mathematical algorithm.Photoelectricity correlation (transmission) formula technology can only be applied to dry-type meter, and photo-electric reflection type technology not only can be applied to dry-type meter, and can be applied to liquid-seal water meter.
The counter of dry-type meter is not immersed in the water, and the chamber of structure upper sensor and counter is isolated, and water gage glass is not by hydraulic pressure, and magnet steel transmission is generally used in the transmission of sensor and counter.The maximum difference of dry-type meter and wet-type meter is metering mechanism, and its impeller and central gear are separated, and impeller upper end is coupled by the magnetic element of magnetic element (magnet ring or column magnet steel) with central gear lower end.When water jet propulsion vane rotary, by the magnetic element of impeller upper end and the magnetic element of central gear lower end attracting or repel each other, drive central gear synchronous rotary, and flowed through the water yield of water meter by center driving counter records.The advantage of dry-type meter is: dry-type meter completely cuts off because of its counting mechanism and tested water, therefore not by the impact of suspended impurity in water, guarantee the normal work of counting mechanism and the clear of reading, simultaneously also can not as wet-type meter, cause because showing internal-external temperature difference and to haze below glass or the globule etc. that condenses affects the phenomenon of water meter copy reading.
But Traditional photovoltaic direct-reading teletransmission dry-type meter Electro Magnetic Compatibility is poor, easily because electromagnetic interference (EMI) causes the reading error even fault of water meter module.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, the photo-electronic directly reading teletransmission dry-type meter providing a kind of Electro Magnetic Compatibility good, meets the electronic product electromagnetic compatibility aspect technical requirements such as EMC, ESD, EMI.
The object of the invention is to be achieved through the following technical solutions: the photo-electronic directly reading teletransmission dry-type meter that Electro Magnetic Compatibility is good, comprise inner screening shell and external shielding case, inner screening shell is arranged between water meter module and external shielding case, inner screening shell and external shielding case are evenly provided with multiple circular ventilation mouth respectively, and the diameter of described circular ventilation mouth is less than the wavelength threshold of pre-given electromagnetic ripple.
Described inner screening shell is successively by the first separated type material layer, the first adhesive layer with conductive fabric is stacked forms, and conductive fabric is arranged at the side near water meter module; Described external shielding case is successively by the second separated type material layer, the second adhesive layer with empire cloth is stacked forms, and the second separated type material layer is arranged at the side near inner screening shell, and empire cloth is arranged at skin.
The invention has the beneficial effects as follows:
1) on the basis ensureing ventilation and heat performance, the present invention absorbs external electromagnetic ripple by external shielding case empire cloth, external electromagnetic ripple can not enter, by the electromagnetic wave that inner screening shell conductive fabric reflection water meter module produces, internal electrical magnetic wave to external radiation, can not have good electromagnetic compatibility shielding function.Meet the electronic product electromagnetic compatibility aspect technical requirements such as EMC, ESD, EMI, place's industry-leading level.
2) be all furnished with separated type material layer between external shielding case and inner screening shell, external shielding case and the adhesion of inner screening shell prepreg can be prevented, prepreg can be protected again not contaminated, can dust adsorption be avoided simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is external shielding case hierarchy schematic diagram in the present invention;
In figure, 1-inner screening shell, 2-external shielding case, 3-circular ventilation mouth, 4-water meter module, 5-first separated type material layer, 6-first adhesive layer, 7-conductive fabric, 8-second separated type material layer, 9-second adhesive layer, 10-empire cloth.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, the photo-electronic directly reading teletransmission dry-type meter that Electro Magnetic Compatibility is good, comprise inner screening shell 1 and external shielding case 2, inner screening shell 1 is arranged between water meter module 4 and external shielding case 2, inner screening shell 1 and external shielding case 2 are evenly provided with multiple circular ventilation mouth 3 respectively, and the diameter of described circular ventilation mouth 3 is less than the wavelength threshold of pre-given electromagnetic ripple.
As shown in Figure 2, described inner screening shell 1 is successively by the first separated type material layer 5, first adhesive layer 6 with conductive fabric 7 is stacked forms, and conductive fabric 7 is arranged at the side near water meter module 4; Described external shielding case 2 is successively by the second separated type material layer 8, second adhesive layer 9 with empire cloth 10 is stacked forms, and the second separated type material layer 8 is arranged at the side near inner screening shell 1, and empire cloth 10 is arranged at skin.
The above is only the preferred embodiment of the present invention, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection domain of claims of the present invention.
Claims (2)
1. the photo-electronic directly reading teletransmission dry-type meter that Electro Magnetic Compatibility is good, it is characterized in that: comprise inner screening shell (1) and external shielding case (2), inner screening shell (1) is arranged between water meter module (4) and external shielding case (2), inner screening shell (1) and external shielding case (2) are evenly provided with multiple circular ventilation mouth (3) respectively, and the diameter of described circular ventilation mouth (3) is less than the wavelength threshold of pre-given electromagnetic ripple.
2. the photo-electronic directly reading teletransmission dry-type meter that Electro Magnetic Compatibility according to claim 1 is good, it is characterized in that: described inner screening shell (1) is successively by the first separated type material layer (5), the first adhesive layer (6) with conductive fabric (7) is stacked forms, and conductive fabric (7) is arranged at the side near water meter module (4); Described external shielding case (2) is successively by the second separated type material layer (8), the second adhesive layer (9) with empire cloth (10) is stacked forms, and the second separated type material layer (8) is arranged at the side near inner screening shell (1), and empire cloth (10) is arranged at skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002275.XA CN105424129A (en) | 2015-12-29 | 2015-12-29 | Photoelectric direct-reading and remote-transmitting dry type water meter with good electromagnetic compatibility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002275.XA CN105424129A (en) | 2015-12-29 | 2015-12-29 | Photoelectric direct-reading and remote-transmitting dry type water meter with good electromagnetic compatibility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105424129A true CN105424129A (en) | 2016-03-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511002275.XA Pending CN105424129A (en) | 2015-12-29 | 2015-12-29 | Photoelectric direct-reading and remote-transmitting dry type water meter with good electromagnetic compatibility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105424129A (en) |
Citations (8)
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|---|---|---|---|---|
| KR200362743Y1 (en) * | 2004-05-24 | 2004-09-22 | (주)이에스텍 | Apparatus for shilding external magnetic force in electical service water meter |
| CN2650079Y (en) * | 2003-10-24 | 2004-10-20 | 贵阳依天电子科技有限公司 | Mechanical watermeter data processor |
| CN101014237A (en) * | 2006-02-01 | 2007-08-08 | 国际商业机器公司 | Permeable conductive shield having a laminated structure |
| CN101514283A (en) * | 2009-01-13 | 2009-08-26 | 东莞市万丰纳米材料有限公司 | Electromagnetic wave shielding material |
| CN202634996U (en) * | 2012-04-24 | 2012-12-26 | 亚旭电子科技(江苏)有限公司 | Electromagnetic wave shield cover |
| KR101242131B1 (en) * | 2011-02-01 | 2013-03-14 | 송창석 | A Separated-type Electronic Water Meter |
| CN203405876U (en) * | 2013-06-29 | 2014-01-22 | 浙江三洲燃气表有限公司 | Anti-electromagnetic interference gas meter |
| CN104981347A (en) * | 2014-04-18 | 2015-10-14 | 华为终端有限公司 | Shielding film, shielding circuit board and terminal device |
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2015
- 2015-12-29 CN CN201511002275.XA patent/CN105424129A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2650079Y (en) * | 2003-10-24 | 2004-10-20 | 贵阳依天电子科技有限公司 | Mechanical watermeter data processor |
| KR200362743Y1 (en) * | 2004-05-24 | 2004-09-22 | (주)이에스텍 | Apparatus for shilding external magnetic force in electical service water meter |
| CN101014237A (en) * | 2006-02-01 | 2007-08-08 | 国际商业机器公司 | Permeable conductive shield having a laminated structure |
| CN101514283A (en) * | 2009-01-13 | 2009-08-26 | 东莞市万丰纳米材料有限公司 | Electromagnetic wave shielding material |
| KR101242131B1 (en) * | 2011-02-01 | 2013-03-14 | 송창석 | A Separated-type Electronic Water Meter |
| CN202634996U (en) * | 2012-04-24 | 2012-12-26 | 亚旭电子科技(江苏)有限公司 | Electromagnetic wave shield cover |
| CN203405876U (en) * | 2013-06-29 | 2014-01-22 | 浙江三洲燃气表有限公司 | Anti-electromagnetic interference gas meter |
| CN104981347A (en) * | 2014-04-18 | 2015-10-14 | 华为终端有限公司 | Shielding film, shielding circuit board and terminal device |
Non-Patent Citations (3)
| Title |
|---|
| 周文盛，黄祖荫: "《电子机械工程设计手册--电磁兼容性设计分册》", 31 October 1987, 电子工业出版社 * |
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Application publication date: 20160323 |
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| RJ01 | Rejection of invention patent application after publication |