CN101303249A - Tap water meter pipe gas meter pan surface metering reading remote centralized display system - Google Patents
Tap water meter pipe gas meter pan surface metering reading remote centralized display system Download PDFInfo
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- CN101303249A CN101303249A CNA2008100613096A CN200810061309A CN101303249A CN 101303249 A CN101303249 A CN 101303249A CN A2008100613096 A CNA2008100613096 A CN A2008100613096A CN 200810061309 A CN200810061309 A CN 200810061309A CN 101303249 A CN101303249 A CN 101303249A
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- meter
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- 239000008399 tap water Substances 0.000 title claims abstract description 52
- 235000020679 tap water Nutrition 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003034 coal gas Substances 0.000 claims description 31
- 239000000428 dust Substances 0.000 claims description 20
- 230000008054 signal transmission Effects 0.000 claims 1
- 239000012780 transparent material Substances 0.000 claims 1
- 241000219739 Lens Species 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012857 repacking Methods 0.000 description 2
- 208000010086 Hypertelorism Diseases 0.000 description 1
- 206010020771 Hypertelorism of orbit Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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Abstract
The invention relates to a remote centralized display system for dial reading of tap water meters and gas pipeline meters. According to the invention, remote centralized displaying of the dial reading of the tap water meters and the gas pipeline meters with no error can be realized. According to the invention, the dial reading showed on domestic tap water meters and/or domestic gas pipeline meters are shot by a camera to form image signals which are transmitted to a display via a video cable, and the images of the dial reading showed on the tap water meters or the gas pipeline meters are displayed on the display. Multi-path video images transmitted from a plurality of families can be displayed on the display one-path by one-path by a video switcher or a frame segmenter. In this way, the dial reading of the tap water meters and the gas pipeline meters can be displayed in a remote centralization way, and water suppliers or gas pipeline suppliers can read the tap water meters and/or the gas pipeline meters conveniently and rapidly on the display.
Description
Technical field
The card metering reading of traditional mechanical formula situ metrology instrument such as tap water meter, Pipeline coal gas flowmeter that involved in the present invention is videotapes and remote centralized displaying.
Background technology
At present, tap water meter that uses in the resident family and Pipeline coal gas flowmeter all are the mechanical type measuring instrument basically, it is directly to read from instrument in the resident family that its continuous data all can only arrive the instrument erecting stage, Running-water Company and piped gas company copy in the resident family from house to house take from water meter or Pipeline coal gas flowmeter continuous data to close the account, this is very inconvenient.Concerning tap water or piped gas company, human cost is big, and inefficiency if there is no one at home for the resident, also will repeatedly be called, and staff's intensity of upstairs running is big.And concerning resident family, the staff of tap water or piped gas company calls and checks meter, and is a big potential safety hazard, also is a kind of bothering simultaneously.Now a small amount of " remote automatic meter reading system " or " tap water meter Pipeline coal gas flowmeter continuous data long-range displaying device " its principle of work that occurs all is by being located in the table tool or outer photoelectricity or the electromagnetism electronic installation of table tool on the market, becomes digital signal to carry out remote transmission and demonstration by wired or wireless mode the data-switching of mechanical record.The subject matter that these remote transmission and display device exist is: 1. is in mechanical type water meter or gas meter, to install an electronic counting measuring apparatus additional, reequips water meter or gas meter inner structure, and pretty troublesome; 2. the mechanical continuous data that is the shown continuous data of electronic counting measuring apparatus and water meter or gas meter has error, has time error also very big; 3. be this electron-like counting measuring apparatus poor work stability, be subject to disturb; 4. the mission life that is this electron-like counting measuring apparatus is short, and maintenance workload is big.
Summary of the invention
The technical problem to be solved in the present invention is, mechanical type tap water meter or Pipeline coal gas flowmeter continuous data are reliablely and stablely carried out remote transmission and demonstration, continuous data is without any error shown in continuous data that remote transmission shows and the mechanical type instrument, self structure to tap water meter and Pipeline coal gas flowmeter is not done repacking, and the water meter of many families family and/or the continuous data of gas meter are realized remote centralized displaying.
The technical solution adopted in the present invention is: near the mechanical type tap water meter in the resident family and (or) the positive appropriate location of Pipeline coal gas flowmeter loads onto video camera, the positive metering reading window of aiming at also close water meter or gas meter card of camera lens, adjust the camera lens focal length, make video camera the complete picture signal of clearly taking into of meter panel and the continuous data shown in the instrument, then this picture signal is transferred to display with vision cable, on display, can be clear that the macrograph picture of meter panel and continuous data thereof.The tap water meter of many families resident family and (or) each road vision signal of transmitting of Pipeline coal gas flowmeter video camera transfers to respectively on " N selects one " type video switcher before the display (N is the total way of vision signal), by manually or automatically operating the change-over switch on the video switcher, with one tunnel one tunnel demonstration on display freely respectively of each road vision signal.Also can pass through image splitter, with multi-channel video signal split screen demonstration on display simultaneously.Display and video switcher and all power switches all are installed in the centralized-control box, centralized-control box is installed in a residential quarter or building or cell gate inner drying is unobstructed makes things convenient for the common point of copy reading data and preparation to manage the case lock,, Running-water Company and (or) the piped gas company tap water meter that just can be convenient and strength-savingly reads each family resident family from display with (or) continuous data of Pipeline coal gas flowmeter.No matter have how many road tap water meters and (or) the continuous data vision signal of Pipeline coal gas flowmeter, can be only with a display.Tap water and piped gas can share a display, promptly share a system (seeing accompanying drawing one); Also can use the display of oneself separately, promptly the vision signal of tap water meter is separated with the vision signal of Pipeline coal gas flowmeter, shows on display separately (seeing accompanying drawing two and accompanying drawing three).Stick near appropriate location, metering reading window place on every mechanical type water meter or the gas meter card that the other distinguishing mark in family of family (stays in Room 201, Unit 3, Building 5 as certain resident family under this instrument of being made by Running-water Company or piped gas company, its family does not indicate it can is " 5-3-201 " or " Room 201, Unit 3, Building 5 " or " 53201 ", " 3201 " or the like), on the other distinguishing mark in this family and the video switcher under the continuous data vision signal of this family family the other mark in family of change-over switch corresponding.(can and lean on) illuminating lamp of configuration near each tap water meter or the pipe gas meter pan surface front with gamma camera, enough to guarantee meter panel brightness, the video camera photographic images is clear.Lighting lamp power and camera power supply are shared.The gauge tap of all video cameras and lighting lamp power all is installed in the centralized-control box at display place, can be the power supply of video camera of switch control and illuminating lamp, also can one the power supply of switch control multiple cameras and illuminating lamp.The supply voltage of gamma camera and illuminating lamp thereof is≤the 36V direct current, to guarantee resident's household electricity safety.If the long voltage line loss of low-voltage dc power supply circuit is too much, then can delivers to than being transformed into low-voltage DC again near the family far away with the 220V alternating current earlier and enter gamma camera and illuminating lamp in the family.Gamma camera can be a color video camera, also can be the black and white gamma camera, and correspondingly joining display is color monitor or black and white display.Display can be a LCD, also can be kinescope display.If gamma camera is from the display hypertelorism, video attenuation is excessive, then should install video amplifier additional.Because of tap water meter all is that the card level that makes progress is installed, the easy dust stratification dirt of card makes the meter reading window smudgy, do not see the continuous data of instrument, water meter often is in dark moist place in addition, gamma camera and illuminating lamp thereof are easily produced corrosion and damage, therefore gamma camera and the illuminating lamp on the water meter is sealed in the dust and moisture box, and the dust and moisture box is that gamma camera shooting face is a clear glass towards the meter reading face.The dust and moisture box of gamma camera and illuminating lamp thereof also is the dustproof housing of water meter card simultaneously.Gamma camera on the Pipeline coal gas flowmeter and illuminating lamp thereof are also sealed within the dust and moisture box, and the dust and moisture box is that gamma camera shooting face is a clear glass towards the coal gas meter reading face.The dust and moisture cartridge body material can be plastics, also can be other materials.
The beneficial effect that the present invention produced is: 1. Running-water Company or the piped gas company person of checking meter can be seen the original shape image of mechanical type tap water meter or pipe gas meter pan surface and metering reading thereof from display, the person of checking meter can directly be read the other distinguishing mark in family of family under the metering reading of this mechanical type instrument and this mechanical type instrument from the image that shows, eliminated fully checking meter on the display that what error occurs between reading and machinery instrument metering reading may be property.2. the person of checking meter can be read to one family, a family all tap water meters that insert remote display system family and/or the metering reading of gas meter by the vision signal switching push button on the operation video switcher on display.3. need not do any repacking to the self structure of mechanical type tap water meter in the resident family or Pipeline coal gas flowmeter, convenient and easy.4. gamma camera and supporting illuminating lamp thereof all have the dust and moisture protection, and be not fragile, long service life, work stable and reliable operation.5. entering the supply gamma camera of resident family and the power supply of illuminating lamp thereof is the following direct current of 36V, guarantees Electrical Safety.
Description of drawings
Accompanying drawing one: this is the circuit and the vision signal wiring schematic diagram of the remote centralized displaying system that share of tap water meter and Pipeline coal gas flowmeter.Heavy line is represented vision cable among the figure, and thinner solid line is represented power lead.The vision signal that every gamma camera transmits is transferred to the video switcher input interface by vision cable separately, and each switching push button of video switcher is all put on the distinctive mark of the other distinguishing mark in corresponding family and tap water, coal gas.The video output signals of video switcher is sent into the vision signal population of display with vision cable.The 220V AC power links to each other with display, video switcher and supply convertor respectively behind master switch, low-voltage dc power supply behind the supply convertor with power lead behind switch separately with resident family in tap water meter link to each other with gamma camera and illuminating lamp thereof before the Pipeline coal gas flowmeter, as the working power of gamma camera and illuminating lamp.The power sharing of the water meter of each household family and the gamma camera of gas meter and supporting illuminating lamp thereof.
Accompanying drawing two: this is the circuit and the vision signal wiring schematic diagram of Pipeline coal gas flowmeter remote centralized displaying system.Heavy line is represented vision cable among the figure, and thinner solid line is represented power lead.The vision signal that every gamma camera transmits is transferred to the video switcher input interface by vision cable separately, and each switching push button of video switcher is all put on the other distinguishing mark in corresponding family.The video output signals of video switcher is sent into the vision signal population of display with vision cable.The 220V AC power links to each other with display, video switcher and supply convertor respectively behind master switch, low-voltage dc power supply behind the supply convertor links to each other with gamma camera and illuminating lamp thereof before the Pipeline coal gas flowmeter in the resident family behind switch separately with power lead, as the working power of gamma camera and illuminating lamp.The gamma camera before the Pipeline coal gas flowmeter of each household family and the power sharing of supporting illuminating lamp thereof.
Accompanying drawing three: this is the circuit and the vision signal wiring schematic diagram of tap water meter remote centralized displaying system.Heavy line is represented vision cable among the figure, and thinner solid line is represented power lead.The vision signal that every gamma camera transmits is transferred to the video switcher input interface by vision cable separately, and each switching push button of video switcher is all put on the other distinguishing mark in corresponding family.The video output signals of video switcher is sent into the vision signal population of display with vision cable.The 220V AC power links to each other with display, video switcher and supply convertor respectively behind master switch, low-voltage dc power supply behind the supply convertor links to each other with gamma camera and illuminating lamp thereof before the tap water meter in the resident family behind switch separately with power lead, as the working power of gamma camera and illuminating lamp.The gamma camera before the tap water meter of each household family and the power sharing of supporting illuminating lamp thereof.
Embodiment
The special other distinguishing mark of making in family of Running-water Company is sticked in the appropriate location on tap water meter card reading glass pane, paste position is not to block meter reading and can intactly be taken into image by gamma camera and be advisable, pasting fastness will get well, and is difficult for being torn, and it is promptly broken to tear.Load onto the dust and moisture box at tap water meter (generally all being card level installation up) card top cover, gamma camera and illuminating lamp are housed in the dust and moisture box, camera lens and illuminating lamp light are aimed at the meter reading window.Camera lens leaving water watch face height, illuminating lamp size and brightness are with complete being advisable of space structure tight shot clear image.Gamma camera and illuminating lamp are fixed in the dust and moisture box, and the dust and moisture box can be fixed on the water meter or on the water supply pipe, fixed form with not only firmly but also conveniently assemble and disassemble be advisable.The dust and moisture box is sleeved on the water meter top water meter card is played dustproof effect.The vision signal wire terminal and the power cord connector of gamma camera and illuminating lamp stretch out outside the dust and moisture box.
The special other distinguishing mark of making in family of piped gas company is sticked in the appropriate location on pipe gas meter pan surface, and paste position is pasted fastness and will be got well not block coal gas meter reading and can intactly be taken into image by gamma camera and be advisable, and is difficult for being torn, and it is promptly broken to tear.Setting up frame near appropriate location, the positive dead ahead of Pipeline coal gas flowmeter, frame can be fixed on the gas meter shell or on the gas piping, moistureproof dust shield case (built-in gamma camera and illuminating lamp) is fixed on the frame, gamma camera and illuminating lamp are fixed in the dust and moisture box, the positive gas meter card reading window of aiming at of camera lens and illuminating lamp light.Frame is left distance (camera lens leaves the distance of gas meter card in other words), illuminating lamp size and the brightness of gas meter card with complete being advisable of space structure tight shot clear image.Gantry configuration should be simply firmly compact.The vision signal wire terminal and the power cord connector of gamma camera and illuminating lamp stretch out outside the dust and moisture box.
Centralized-control box is installed in the common point of the dry unobstructed safe ready of a residential quarter or a building, a building or a unit door opening.The total power switch of centralized-control box and 220V AC network power supply join.Display, video switcher, supply convertor, all power switches etc. all are installed in the centralized-control box, and the power supply and the total power switch of display, video switcher, supply convertor join.Centralized-control box is added with door lock.Door lock is managed by Running-water Company and/or the piped gas company person of checking meter.When not checking meter reading at ordinary times, general supply is cut off, and total system is not charged, and the control box door lock closes.
Each road vision signal wire terminal links to each other with corresponding vision cable, and vision cable directly leads to centralized control and thinks video switcher in the case to insert the corresponding video input hole of video switcher.The gamma camera power lead of each household family and supporting lighting lamp power line also connect the back and link to each other with outdoor main dc power supply line, and the DC output end of this road power switch and supply convertor links to each other in outdoor main dc power supply line and the centralized-control box.To cross voltage line loss far away too much if gamma camera leaves display, then the gamma camera power lead links to each other with outdoor main dc power supply line with the lighting lamp power line and after connecing, outdoor main dc power supply line links to each other with the DC output end of nearby supply convertor midway, and the 220V alternating current input end of supply convertor is continuous with this road power switch in the centralized-control box and be connected the 220V general supply with power lead midway.To cross long sight signal attenuation frequently too much if gamma camera leaves display, then can install video amplifier halfway additional.
When the person of checking meter will be checked meter, open the centralized-control box door lock earlier, the total power switch that closes, at this moment display, video switcher, supply convertor etc. have all been switched on, and are in running order.Open the power switch of gamma camera and supporting illuminating lamp thereof then, gamma camera on this road power circuit and illuminating lamp are just in running order, vision signal just reaches video switcher, by operation video switch switch, the tap water meter or the pipe gas meter pan surface metering reading image that just can on display, show certain family family, the metering reading of water-meter reading or gas meter from the image that shows.After the work of checking meter on the power supply of videotaping of same road is finished, cut off this road power supply, open another road gamma camera and supporting lighting lamp power switch, proceed to show reading.After all work of checking meter are all finished, cut off all power supplys, shut the centralized control chamber door.
Claims (5)
1. " tap water meter, pipe gas meter pan surface metering reading remote centralized displaying system " takes into picture intelligence to the tap water meter in the resident family and/or the metering reading shown in the pipe gas meter pan surface and meter panel with gamma camera, this picture intelligence transfers to apparent (prison) by vision cable and shows device (the following display that all is called), can be clear that metering reading shown in tap water meter or the pipe gas meter pan surface on display.The multi-channel video signal that gamma camera transmitted on tap water meter in the family of many families and/or the Pipeline coal gas flowmeter can show on display respectively by video switcher one tunnel one road ground.Also can pass through image splitter, with multi-channel video signal split screen demonstration on display simultaneously.Make the tap water meter and/or the metering reading on the Pipeline coal gas flowmeter of many families family realize remote centralized displaying.Display, video switcher and various gauge tap are installed concentratedly in the public position that makes things convenient for, and Running-water Company or piped gas company can not register one's residence and read the metering reading of tap water meter in the resident family and/or Pipeline coal gas flowmeter quickly and easily on display.
Adopt and pinch to resemble machine (black and white or colour) tap water meter in the resident family and/or Pipeline coal gas flowmeter meter panel metering reading are taken into the sharp image vision signal, transfer to display (black and white or colour) by vision cable, on display, show tap water meter and/or pipe gas meter pan surface metering reading.
2. the gamma camera (black and white or colour) of the tap water meter of many families family (family's quantity is started at many families from a family) and/or Pipeline coal gas flowmeter each road vision signal of taking, transfer to video switcher by vision cable respectively, with the switching push button on the manual or automatic switch video switcher, the one tunnel one the tunnel goes up demonstration at display (black and white or colour) respectively.Or, the camera video signal of multichannel tap water meter and/or Pipeline coal gas flowmeter is gone up split screen at display (black and white or colour) show simultaneously by image splitter.
3. stick the special other distinguishing mark of making of family (as resident family's room number) by Running-water Company or piped gas company at the tap water meter of each household family or the appropriate location of Pipeline coal gas flowmeter reading card, the other distinguishing mark in the family on the tap water meter of each household family or the gas meter card is corresponding with family's distinguishing mark of preceding each the road video signal transmission cable of display.The other distinguishing mark in family can completely enter image at the paste position on tap water meter or the pipe gas meter pan surface with gamma camera and not block reading again simultaneously and be advisable when taking card metering reading image.
4. dispose illuminating lamp near tap water meter and/or the Pipeline coal gas flowmeter, illuminating lamp illuminates tap water meter and/or Pipeline coal gas flowmeter reading card, makes gamma camera take the clear image of card metering reading.
5. gamma camera (or the illuminating lamp of gamma camera and configuration is together) is installed in the moistureproof dust shield case, the camera lens of moistureproof dust shield case towards the side (promptly videotaping daylighting face) be colourless transparent material.The moistureproof dust shield case while of employed gamma camera is as the dustproof housing of tap water meter on the tap water meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100613096A CN101303249A (en) | 2008-04-29 | 2008-04-29 | Tap water meter pipe gas meter pan surface metering reading remote centralized display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100613096A CN101303249A (en) | 2008-04-29 | 2008-04-29 | Tap water meter pipe gas meter pan surface metering reading remote centralized display system |
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| Publication Number | Publication Date |
|---|---|
| CN101303249A true CN101303249A (en) | 2008-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100613096A Pending CN101303249A (en) | 2008-04-29 | 2008-04-29 | Tap water meter pipe gas meter pan surface metering reading remote centralized display system |
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| CN (1) | CN101303249A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ304790B6 (en) * | 2012-11-29 | 2014-10-22 | Vysoká Škola Báňská-Technická Univerzita Ostrava | Autonomous system for contactless analysis of consumption meter state, distributed architecture formed by at least two autonomous systems and method of making consumption meter analysis |
| CN104568043A (en) * | 2014-02-27 | 2015-04-29 | 深圳市华旭科技开发有限公司 | Large-diameter electronic intelligent water meter |
| CN104822051A (en) * | 2015-04-24 | 2015-08-05 | 湖北泽捷电子科技有限公司 | Instrument character code video digital acquisition device |
| CN104822053A (en) * | 2015-04-24 | 2015-08-05 | 湖北泽捷电子科技有限公司 | Instrument character code video digital acquisition device |
| CN105102932A (en) * | 2013-01-07 | 2015-11-25 | 萨基姆通讯能源及电信联合股份公司 | Method of initializing a remote-reading device |
| CN106441519A (en) * | 2016-09-20 | 2017-02-22 | 杭州电子科技大学 | A method for detecting the rotation of the mechanical dial of a gas meter |
| CN107063403A (en) * | 2017-03-31 | 2017-08-18 | 上海大学 | Mechanical water meter measuring accuracy automatic detection device and method |
| CN108551567A (en) * | 2018-04-11 | 2018-09-18 | 江苏常探机器人有限公司 | Figure biography formula detector data acquisition system |
| CN110579242A (en) * | 2019-08-31 | 2019-12-17 | 徐顺球 | Instrument and meter capable of clearly reading |
| CN111174847A (en) * | 2018-11-09 | 2020-05-19 | 群光电子股份有限公司 | Meter Auxiliary Module |
| CN111811597A (en) * | 2020-07-11 | 2020-10-23 | 嘉兴学院 | Smart gas meter based on IoT communication |
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2008
- 2008-04-29 CN CNA2008100613096A patent/CN101303249A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ304790B6 (en) * | 2012-11-29 | 2014-10-22 | Vysoká Škola Báňská-Technická Univerzita Ostrava | Autonomous system for contactless analysis of consumption meter state, distributed architecture formed by at least two autonomous systems and method of making consumption meter analysis |
| CN105102932A (en) * | 2013-01-07 | 2015-11-25 | 萨基姆通讯能源及电信联合股份公司 | Method of initializing a remote-reading device |
| CN105102932B (en) * | 2013-01-07 | 2017-05-24 | 萨基姆通讯能源及电信联合股份公司 | Method of initializing a remote-reading device |
| CN104568043B (en) * | 2014-02-27 | 2017-10-27 | 深圳市华旭科技开发有限公司 | Heavy caliber electronic intelligence water meter |
| CN104568043A (en) * | 2014-02-27 | 2015-04-29 | 深圳市华旭科技开发有限公司 | Large-diameter electronic intelligent water meter |
| CN104822051A (en) * | 2015-04-24 | 2015-08-05 | 湖北泽捷电子科技有限公司 | Instrument character code video digital acquisition device |
| CN104822053A (en) * | 2015-04-24 | 2015-08-05 | 湖北泽捷电子科技有限公司 | Instrument character code video digital acquisition device |
| CN106441519B (en) * | 2016-09-20 | 2019-04-02 | 杭州电子科技大学 | A kind of detection method of turn-taking for gas meter, flow meter machinery dial plate |
| CN106441519A (en) * | 2016-09-20 | 2017-02-22 | 杭州电子科技大学 | A method for detecting the rotation of the mechanical dial of a gas meter |
| CN107063403A (en) * | 2017-03-31 | 2017-08-18 | 上海大学 | Mechanical water meter measuring accuracy automatic detection device and method |
| CN108551567A (en) * | 2018-04-11 | 2018-09-18 | 江苏常探机器人有限公司 | Figure biography formula detector data acquisition system |
| CN111174847A (en) * | 2018-11-09 | 2020-05-19 | 群光电子股份有限公司 | Meter Auxiliary Module |
| CN111174847B (en) * | 2018-11-09 | 2021-09-07 | 群光电子股份有限公司 | Meter Auxiliary Module |
| CN110579242A (en) * | 2019-08-31 | 2019-12-17 | 徐顺球 | Instrument and meter capable of clearly reading |
| CN110579242B (en) * | 2019-08-31 | 2021-04-27 | 广州邦贝机电设备有限公司 | Instrument and meter capable of clearly reading |
| CN111811597A (en) * | 2020-07-11 | 2020-10-23 | 嘉兴学院 | Smart gas meter based on IoT communication |
| CN111811597B (en) * | 2020-07-11 | 2022-05-13 | 嘉兴学院 | Smart gas meter based on IoT communication |
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Open date: 20081112 |