CN108040231A - A kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment - Google Patents
A kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment Download PDFInfo
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- CN108040231A CN108040231A CN201711444033.5A CN201711444033A CN108040231A CN 108040231 A CN108040231 A CN 108040231A CN 201711444033 A CN201711444033 A CN 201711444033A CN 108040231 A CN108040231 A CN 108040231A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000003384 imaging method Methods 0.000 title claims abstract description 31
- 238000001228 spectrum Methods 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- 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
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
- G01F15/063—Indicating or recording devices for remote indication using electrical means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention relates to battery powered LoRa water meters code-disc imaging identification teletransmission equipment,Including shell (100),Shell (100) is fixed on beside mechanical water meter,CPU (200) is provided with shell (100),Battery (300),Camera (400) and LoRa chips (500),Battery (300) is used to give CPU (200),Camera (400) and LoRa chips (500) power supply,Camera (400) is used to shoot the encoder digital of mechanical water meter and the photo of shooting is transferred to CPU (200),CPU (200) be used for camera shooting photo parsed with obtain mechanical water meter encoder digital numerical value,LoRa chips (500) are connected with CPU (200),Numerical value for the encoder digital after CPU (200) is parsed is uploaded to wireless meter reading (600).It directly can transfer data to wireless meter reading, it can be achieved that the automatic data logging of Running-water Company's mechanical water meter without outer power supply source.
Description
Technical field
The invention belongs to automatic data logging technical field of auxiliary equipment, is related to a kind of water meter code-disc imaging identification teletransmission equipment,
More particularly to a kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment.
Background technology
In order to realize the automatic data logging of mechanical water meter, taken the photograph using MBUS water meter code-discs in Running-water Company
The encoder digital of mechanical water meter is identified and teletransmission as identification teletransmission equipment.But the MBUS water meter codes used at present
Disk imaging identification teletransmission equipment is that the encoder digital picture of the standard machinery water meter of camera shooting is passed through imaging identification teletransmission
After the CPU processing of equipment, collector or concentrator are transferred to by the wired modes of MBUS, then pass through collector or concentrator
The wireless communication network of mobile, unicom or telecommunications is transferred to, is finally passed again by the wireless communication network of movement, unicom or telecommunications
It is defeated on computer.In this way, it is necessary to which external equipment provides direct current to MBUS water meter code-disc imaging identification teletransmissions equipment
24V power supplys.And direct current 24V power supplys need to convert by 220V AC powers.But since most of mechanical water meter is installed
Scene does not have 220V AC powers, and which limit the versatility that MBUS water meter code-disc imaging identification teletransmission equipment uses.Meanwhile
MBUS water meter code-disc imaging identification teletransmission equipment cannot directly transfer data to the wireless communication networks of mobile, unicom or telecommunications
Road is, it is necessary to additional collector or concentrator.Which limit the versatility that water meter code-disc imaging identification remote-transmission module uses, and increase
Add extra collecting device, add cost.
In view of the drawbacks described above of the prior art, is badly in need of a kind of new mechanical water meter code-disc imaging identification teletransmission and sets at present
It is standby.
The content of the invention
It is an object of the invention to overcome shortcoming existing in the prior art, there is provided a kind of battery powered LoRa water meters code
Disk imaging identification teletransmission equipment, it directly can transfer data to wireless meter reading, it can be achieved that tap water without outer power supply source
The automatic data logging of company's mechanical water meter.
To achieve these goals, the present invention provides following technical solution：
A kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment, it includes shell, and the shell is fixed on
Beside mechanical water meter, it is characterised in that CPU, battery, camera and LoRa chips are provided with the shell, wherein, the electricity
Pond is used for the CPU, camera and LoRa chip power supplies, and the camera is used for the encoder digital for shooting the mechanical water meter
And the photo of shooting is transferred to the CPU, the CPU is used to parse to obtain the photo of camera shooting
The numerical value of the encoder digital of mechanical water meter is stated, the LoRa chips are connected with the CPU, for the code after the CPU is parsed
The numerical value of disk numeral is uploaded to wireless meter reading.
Further, wherein, the shell has IP68 degree of protection.
Further, wherein, the CPU is STM32 chips.
Yet further, wherein, the battery is 8500mAH high-capacity lithium batteries.
Again further, wherein, the camera has the adjustable zoom lens of 300,000 pixels.
Finally, wherein, the LoRa chips based on spread spectrum technic by the CPU parse after encoder digital numerical value
It is uploaded to the wireless meter reading.
Compared with existing MBUS water meters code-disc imaging identification teletransmission equipment, battery powered LoRa water meters code of the invention
Disk imaging identification teletransmission equipment has following advantageous effects：
1st, it is from charged pool, it is not necessary to provides power supply using external equipment, when in use from the limitation of external power supply, increases
The versatility used is added.
2nd, it uses LoRa chips, and LoRa chips are based on spread spectrum technic directly by data transfer to radio meter register
Device, saves intermediate link, very easy to use, and cost is than relatively low.
3rd, the application of the equipment is, it can be achieved that the automatic meter-reading of Running-water Company's mechanical water meter.
Brief description of the drawings
Fig. 1 is the composition schematic diagram of the battery powered LoRa water meters code-disc imaging identification teletransmission equipment of the present invention.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples, and the content of embodiment is not as the guarantor to the present invention
Protect the limitation of scope.
The present invention relates to a kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment, it is by existing MBUS water
Table code-disc imaging identification teletransmission scrap build forms, and is used for realization the remote automatic meter reading of mechanical water meter.
Fig. 1 shows the composition schematic diagram of the battery powered LoRa water meters code-disc imaging identification teletransmission equipment of the present invention.
As shown in Figure 1, the battery powered LoRa water meters code-disc imaging identification teletransmission equipment of the present invention includes shell 100.The shell
100 are fixed on beside mechanical water meter.Wherein, other zero of the battery powered LoRa water meters code-disc imaging identification teletransmission equipment
Part is all installed in the shell 100.Preferably, the shell 100 has IP68 degree of protection.In this way, the shell 100 can
To prevent water from entering in the shell 100, and then contribute to other parts of the protection in the shell 100.
CPU200, battery 300, camera 400 and LoRa chips 500 are provided with the shell 100.
Wherein, the battery 300 is used to power to the CPU200, camera 400 and LoRa chips 500.In the present invention
In, since the battery powered LoRa water meters code-disc imaging identification teletransmission equipment carries the battery 300, therefore, there is no need to
Power supply is provided using external equipment, when in use from the limitation of external power supply, adds the LoRa water meter code-disc imaging identifications
The versatility that teletransmission equipment uses.Also, in the present invention, it is preferred to the battery 300 is 8500mAH high-capacity lithium batteries.
In this way, its capacity is big, and usage time length, it is not necessary to battery is often manually replaced, it is more convenient to use.
The camera 400 is used for the encoder digital for shooting the mechanical water meter and is transferred to the photo of shooting described
CPU200.When mounted, the camera 400 against the mechanical water meter code-disc, in order to shoot the mechanical water meter
Encoder digital.In the present invention, it is preferred to the camera 400 has the adjustable zoom lens of 300,000 pixels.In this way, on the one hand make
The picture for obtaining its shooting is apparent so as to which the CPU200 that is more convenient for is parsed and be more convenient for captured picture to ensure
The correctness of the numerical value of encoder digital after parsing；On the other hand, due to adjustable focus so that it requires installation site not tight
Lattice, applicability are wider, more convenient to use.
The CPU200 is used to parse to obtain the code of the mechanical water meter photo of the camera 400 shooting
The numerical value of disk numeral.In the present invention, it is preferred to the CPU200 is STM32 chips.The STM32 chips are embedded low
Power consumption microchip.In this way, the CPU200 can be solved with the digital picture that various algorithms shoot the camera 400
Analysis obtains the numerical value of encoder digital.
In the present invention, used main algorithm includes following algorithm：
1st, the adaptive instantaneous exposure algorithms of double PID
The quality of picture acquired in CPU control cameras, will directly affect complexity and the accuracy of subsequent treatment, and
The effect of exposure will directly influence the quality of picture.If using adpative exposure algorithm, when needing to consume substantial amounts of
Between and software and hardware resources, and in battery powered system, simple function duration length means that power consumption is big, it is necessary to consume
Fall more energy contents of battery.Therefore in order to reduce power consumption, it is necessary to which quickening, which is taken pictures, takes the figure time, while shortens exposure LED illumination
Time.To reach this purpose, with reference to shooting water meter structure feature, using the adaptive instantaneous exposure algorithms of double PID.It is mainly handled
Process can be divided into two steps, first step coarse adjustment time for exposure, second step fine tuning exposure gain.Algorithm runs the brightness value to set
For target, it is first turned on that brightness value is exposed and sampled with empirical parameter, if the brightness value of sampling fails to reach object brightness
Value, or more than target brightness value, then by adjusting exposure time parameter, comparing the brightness of acquisition, whether can to reach target bright
Angle value；If target brightness value can be reached, stop exposure iteration, open picture shooting and be transmitted to CPU processes.If coarse adjustment
Reception still fails to reach preferable brightness value, then by adjusting exposure gain parameter, is iterated, the brightness until reaching target
Value.Using this algorithm, by under dark and bright natural light environment, can reach the purpose quick and precisely exposed, relatively
Using traditional adpative exposure algorithm, the time for exposure shortens to 500ms from 3-5s, and can obtain stable picture.
2nd, double LED exposure control algolithms
Water meter code-disc is typically that rectangle is either square, the elliptical shape of boundary strip.In order to obtain preferable brightness
Code-disc picture using the LED of high brightness, it is necessary to be exposed as much as possible.If taking single Exposing Lamp, need to expose
Optical position is arranged on centre position, and sets and arrive centre position, then can produce big on acquired picture by camera
Hot spot, influences recognition effect.In order to illuminate code-disc as much as possible, and hot spot is not produced on picture, (every group each using two groups
Have two) double LED exposures mechanism, control two groups of LED to illuminate the left-right parts of code-disc respectively, then obtained by stitching algorithm
Take well-exposed picture.
3rd, the double Binarization methods of variable thresholding
It is digital, it is necessary to obtain out the digit position on code-disc position and code-disc respectively to obtain accurately identification.Due to whole
Brightness of image differs in graph region, in order to accurately obtain identification numeral, devises the double Binarization methods of variable thresholding.First stage
For code-disc positioning stage, in this stage, in order to obtain code-disc boundary characteristic, using one group of experience binaryzation parameter, as two-value
Change threshold value, carrying out borderline region to picture sounds out acquisition；After system gets accurate code-disc border, another group of experience is opened
Binaryzation parameter, as binary-state threshold, code-disc carries out binaryzation, to carry out code-disc segmentation., can be by code-disc by this process
Identify, and code-disc is split, obtain accurately identifying target.
4th, projection properties recognizer
After the higher picture target to be identified of quality is obtained, using projection properties recognizer, by number on picture
The feature of word carries out project focus spot's analysis by reference axis of the transverse and longitudinal direction of code-disc respectively, and matching characteristic, carries out image digitization
Preliminary identification.
5th, template matching algorithm
On the basis that image digitization has carried out preliminary identification, using template matching algorithm, deposited in advance using to meter
The recognition template stored up, to contrast identified numeral and normalized template matching degree, in the case of meeting matching threshold,
Export matching result and recognition result.
Above-mentioned various algorithms are all the prior arts, and the emphasis of non-invention, therefore, no longer do more detailed introduction.
The LoRa chips 500 are connected with the CPU200, the number for the encoder digital after the CPU200 is parsed
Value is uploaded to wireless meter reading 600.The LoRa chips 500 are low-power consumption general-purpose chip.In the present invention, the LoRa chips
The numerical value of encoder digital after CPU200 parsings is uploaded to the wireless meter reading 600 by 500 based on spread spectrum technic.
Since the LORA chips 500 carry out based on spread spectrum technic the transmission of numerical value, it is with long transmission distance, ultralow
The features such as power consumption, low cost.
The battery powered LoRa water meters code-disc imaging identification teletransmission equipment of the present invention shoots mechanical water meter by camera
Picture, passes to CPU by picture and carries out picture recognition, the numerical value after identification is uploaded to wireless meter reading by LORA chips.This sets
Standby application is, it can be achieved that the automatic meter-reading of Running-water Company's mechanical water meter.Simultaneously as it is from charged pool, it is not necessary to makes
Power supply is provided with external equipment, when in use from the limitation of external power supply, adds the versatility used.Moreover, its LoRa
Chip is based on spread spectrum technic directly by data transfer to wireless meter reading, saves intermediate link, very easy to use, and
Cost is than relatively low.
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to the present invention
Embodiment restriction.For those of ordinary skill in the field, can also make on the basis of the above description
Other various forms of changes or variation.Here all embodiments can not be exhaustive.Every skill for belonging to the present invention
Row of the obvious changes or variations that art scheme is extended out still in protection scope of the present invention.
Claims (6)
1. a kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment, it includes shell (100), the shell
(100) it is fixed on beside mechanical water meter, it is characterised in that be provided with CPU (200), battery (300) in the shell (100), take the photograph
As head (400) and LoRa chips (500), wherein, the battery (300) for the CPU (200), camera (400) and
LoRa chips (500) are powered, and the camera (400) is used to shoot the encoder digital of the mechanical water meter and by the photo of shooting
The CPU (200) is transferred to, and the CPU (200) is used to the photo of camera shooting is parsed to obtain the machine
The numerical value of the encoder digital of tool water meter, the LoRa chips (500) are connected with the CPU (200), for by the CPU (200)
The numerical value of encoder digital after parsing is uploaded to wireless meter reading (600).
2. battery powered LoRa water meters code-disc imaging identification teletransmission equipment according to claim 1, it is characterised in that institute
Stating shell (100) has IP68 degree of protection.
3. battery powered LoRa water meters code-disc imaging identification teletransmission equipment according to claim 2, it is characterised in that institute
It is STM32 chips to state CPU (200).
4. battery powered LoRa water meters code-disc imaging identification teletransmission equipment according to claim 3, it is characterised in that institute
It is 8500mAH high-capacity lithium batteries to state battery (300).
5. battery powered LoRa water meters code-disc imaging identification teletransmission equipment according to claim 4, it is characterised in that institute
Stating camera (400) has the adjustable zoom lens of 300,000 pixels.
6. battery powered LoRa water meters code-disc imaging identification teletransmission equipment according to claim 5, it is characterised in that institute
State LoRa chips (500) be based on the encoder digital after spread spectrum technic parses the CPU (200) numerical value be uploaded to it is described
Wireless meter reading (600).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711444033.5A CN108040231A (en) | 2017-12-27 | 2017-12-27 | A kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711444033.5A CN108040231A (en) | 2017-12-27 | 2017-12-27 | A kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment |
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| CN108040231A true CN108040231A (en) | 2018-05-15 |
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| CN201711444033.5A Pending CN108040231A (en) | 2017-12-27 | 2017-12-27 | A kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285333A (en) * | 2018-09-05 | 2019-01-29 | 江苏爱尔数字科技有限公司 | A kind of multidimensional data independence wireless acquisition terminal based on Internet of Things |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008638A (en) * | 2014-06-06 | 2014-08-27 | 杭州燃网智能科技有限公司 | Image pick-up and meter reading system for gas metering based on internet of things and meter reading method |
| CN205486712U (en) * | 2015-12-29 | 2016-08-17 | 浙江璟恩物联网科技有限公司 | Microspur is made a video recording picture and is gathered centralized processing and upload device |
| CN106373365A (en) * | 2016-11-02 | 2017-02-01 | 山东金米尔仪器科技有限公司 | Camera shooting type remote water meter reading system achieving fast recognition and reading recognition method thereof |
| CN106441480A (en) * | 2016-08-04 | 2017-02-22 | 苗进辉 | Image pickup direct-reading remote-transmitting water meter adopting mechanical seven-segment-code character code disc water meter |
| CN206311161U (en) * | 2016-12-09 | 2017-07-07 | 无锡聚为科技有限公司 | A kind of on-site wireless teletransmission transformation device based on the mechanical water meter taken pictures |
| US20170230074A1 (en) * | 2016-02-05 | 2017-08-10 | Apana Inc. | Low power, centralized data collection |
| CN207603815U (en) * | 2017-12-27 | 2018-07-10 | 洛阳愿景科技有限公司 | A kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment |
-
2017
- 2017-12-27 CN CN201711444033.5A patent/CN108040231A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008638A (en) * | 2014-06-06 | 2014-08-27 | 杭州燃网智能科技有限公司 | Image pick-up and meter reading system for gas metering based on internet of things and meter reading method |
| CN205486712U (en) * | 2015-12-29 | 2016-08-17 | 浙江璟恩物联网科技有限公司 | Microspur is made a video recording picture and is gathered centralized processing and upload device |
| US20170230074A1 (en) * | 2016-02-05 | 2017-08-10 | Apana Inc. | Low power, centralized data collection |
| CN106441480A (en) * | 2016-08-04 | 2017-02-22 | 苗进辉 | Image pickup direct-reading remote-transmitting water meter adopting mechanical seven-segment-code character code disc water meter |
| CN106373365A (en) * | 2016-11-02 | 2017-02-01 | 山东金米尔仪器科技有限公司 | Camera shooting type remote water meter reading system achieving fast recognition and reading recognition method thereof |
| CN206311161U (en) * | 2016-12-09 | 2017-07-07 | 无锡聚为科技有限公司 | A kind of on-site wireless teletransmission transformation device based on the mechanical water meter taken pictures |
| CN207603815U (en) * | 2017-12-27 | 2018-07-10 | 洛阳愿景科技有限公司 | A kind of battery powered LoRa water meters code-disc imaging identification teletransmission equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285333A (en) * | 2018-09-05 | 2019-01-29 | 江苏爱尔数字科技有限公司 | A kind of multidimensional data independence wireless acquisition terminal based on Internet of Things |
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