CN104735418B - Electric energy meter wireless kilowatt meter reading-out system - Google Patents
Electric energy meter wireless kilowatt meter reading-out system Download PDFInfo
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Abstract
The present invention relates to a kind of electric energy meter wireless kilowatt meter reading-out system, described system comprises AT89C51 single-chip microcomputer, Zigbee communication interface, GPRS communication interface and multiple electric energy meter reading terminal, each electric energy meter reading terminal comprises IMAQ subset and image procossing subset for carrying out IMAQ and image procossing respectively to the reading of corresponding electric energy meter, to obtain the digitized indications of corresponding electric energy meter, AT89C51 single-chip microcomputer is connected with multiple electric energy meter reading terminal wireless by Zigbee communication interface, to obtain the digitized indications of multiple electric energy meter, and by GPRS communication interface and the wireless connections of far-end intelligent meter data recording platform so that the digitized indications of multiple electric energy meter is wirelessly sent to described intelligent meter data recording platform.By the present invention, even if also accurately long distance wireless reading can be carried out to electric energy meter reading under haze weather, ensure that the reliability of kilowatt meter reading-out system work.
Description
Technical field
The present invention relates to electric energy meter field, particularly relate to a kind of electric energy meter wireless kilowatt meter reading-out system.
Background technology
Electric energy meter is the instrumentation determining unit and electricity consumption of resident size, the acquisition of electric energy meter reading is the important step that supplier of electricity carries out the electricity charge and collects, and thus, the acquisition of electric energy meter reading needs accurately, numerous simultaneously due to electric energy meter quantity, the acquisition of electric energy meter reading also needs efficiently.
Traditional electric energy meter reading obtain manner carries out craft by the supplier of electricity personnel that arrange work to electric energy meter position to check meter, the mode workload that this craft is checked meter is large, efficiency is low, can not monitor in real time electricity consumption situation, simultaneously, also some remote meter reading schemes have been there are, by the image capture device of electric energy meter position, electric energy meter is taken, by image processing equipment, Recognition of Reading is carried out to electric energy meter image, but these remote meter reading schemes are not all considered when haze is serious, and haze is on the impact of electric energy meter reading.
Therefore, need a kind of new electric energy meter intelligent meter reading system, original manual metering mode can be substituted, improve the efficiency of checking meter, the process of mist elimination haze is carried out, to ensure the precision of the electric energy meter reading of acquisition to the electric energy meter image of shooting simultaneously.
Summary of the invention
In order to solve the problem, the invention provides a kind of electric energy meter wireless kilowatt meter reading-out system, a set of wireless data transceiving platform that utilized Zigbee communication technology and the GPRS communication technology to build, ensure the high efficiency of transfer of data, meanwhile, according to atmospheric attenuation model determination haze to the influencing factor of image, and the process of mist elimination haze is carried out to the electric energy meter image gathered under haze weather, obtain electric energy meter image clearly, thus ensure the accuracy of Recognition of Reading.
According to an aspect of the present invention, provide a kind of electric energy meter wireless kilowatt meter reading-out system, described system comprises AT89C51 single-chip microcomputer, Zigbee communication interface, GPRS communication interface and multiple electric energy meter reading terminal, each electric energy meter reading terminal comprises IMAQ subset and image procossing subset for carrying out IMAQ and image procossing respectively to the reading of corresponding electric energy meter, to obtain the digitized indications of corresponding electric energy meter, AT89C51 single-chip microcomputer is connected with multiple electric energy meter reading terminal wireless by Zigbee communication interface, to obtain the digitized indications of multiple electric energy meter, and by GPRS communication interface and the wireless connections of far-end intelligent meter data recording platform so that the digitized indications of multiple electric energy meter is wirelessly sent to described intelligent meter data recording platform.
More specifically, in described electric energy meter wireless kilowatt meter reading-out system, also comprise: first serial, between described AT89C51 single-chip microcomputer and described Zigbee communication interface, for being connected with described AT89C51 single-chip microcomputer by described Zigbee communication interface, described first serial is RS485 serial port module, second serial, between described AT89C51 single-chip microcomputer and described GPRS communication interface, for described GPRS communication interface being connected with described AT89C51 single-chip microcomputer, described second serial is RS232 serial port module, power module, comprise solar powered device, storage battery, diverter switch and electric pressure converter, described diverter switch is connected respectively with described solar powered device and described storage battery, determine whether be switched to described solar powered device to be powered by described solar powered device according to storage battery dump energy, described electric pressure converter is connected with described diverter switch, with the 5V voltage transitions will inputted by diverter switch for 3.3V voltage, each electric energy meter reading terminal also comprises: store subset, for prestoring sky upper limit gray threshold and sky lower limit gray threshold, described sky upper limit gray threshold and described sky lower limit gray threshold are for separating of the sky areas of publishing picture in picture, also for prestoring presetted pixel value threshold value, described presetted pixel value threshold value value is between 0 to 255, haze Concentration Testing subset, is arranged in air, for detecting the haze concentration of corresponding electric energy meter position in real time, and removes intensity according to haze concentration determination haze, and described haze removes intensity value between 0 to 1, described IMAQ subset is a CMOS vision sensor, and carry out IMAQ to obtain target electric energy meter image to the reading of corresponding electric energy meter, the resolution of described target electric energy meter image is 1920 × 1080, Region dividing subset, be connected respectively with described storage subset and described IMAQ subset, gray processing process is carried out to obtain gray processing target electric energy meter image to described target electric energy meter image, the pixel identification of gray value in described gray processing target electric energy meter image between described sky upper limit gray threshold and described sky lower limit gray threshold is formed gray processing sky sub pattern, described gray processing sky sub pattern is gone out to obtain the non-sky subgraph of gray processing from described gray processing target electric energy meter Iamge Segmentation, the colour non-sky subgraph corresponding with described gray processing non-sky subgraph is obtained based on the position of described gray processing non-sky subgraph in described target electric energy meter image, black channel obtains subset, be connected with described Region dividing subset to obtain the non-sky subgraph of described colour, for each pixel in the non-sky subgraph of described colour, calculate its R, G, B tri-Color Channel pixel value, the R of all pixels in described colour non-sky subgraph, G, B tri-extracts the Color Channel at the minimum Color Channel pixel value place of numerical value in Color Channel pixel value as black channel, overall air light value obtains subset, be connected to obtain presetted pixel value threshold value with described storage subset, obtain subset with described Region dividing subset and described black channel to be connected respectively to obtain described target electric energy meter image and described black channel, multiple pixels that black channel pixel value in described target electric energy meter image is more than or equal to presetted pixel value threshold value are formed set of pixels to be tested, the gray value air light value as a whole of the pixel of maximum gradation value will be had in described set of pixels to be tested, atmospheric scattering light value obtains subset, be connected respectively with described Region dividing subset and described haze Concentration Testing subset, to each pixel of described target electric energy meter image, extract its R, G, in B tri-Color Channel pixel value, minimum value is as target pixel value, use and keep the Gaussian filter EPGF (edge-preservinggaussianfilter) at edge to carry out filtering process to obtain filtered target pixel value to described target pixel value, target pixel value is deducted filtered target pixel value to obtain object pixel difference, EPGF is used to carry out filtering process to obtain filtered target pixel value difference to object pixel difference, filtered target pixel value is deducted filtered target pixel value difference and remove fiducial value to obtain haze, haze is removed intensity and be multiplied by haze removal fiducial value to obtain haze removal threshold value, get haze and remove minimum value in threshold value and target pixel value as comparison reference, get the atmospheric scattering light value of the maximum in comparison reference and 0 as each pixel, medium transmission rate obtains subset, obtain subset and described atmospheric scattering light value with described overall air light value to obtain subset and be connected respectively, the atmospheric scattering light value of each pixel is removed value divided by overall air light value to obtain, deducts 1 described except value is to obtain the medium transmission rate of each pixel, sharpening image acquisition subset, with described Region dividing subset, described overall air light value obtains subset and is connected respectively with described medium transmission rate acquisition subset, the medium transmission rate of each pixel is deducted to obtain the first difference by 1, described first difference is multiplied by overall air light value to obtain product value, the pixel value of each pixel in described target electric energy meter image is deducted described product value to obtain the second difference, by described second difference divided by the medium transmission rate of each pixel to obtain the sharpening pixel value of each pixel, in described target electric energy meter image, the pixel value of each pixel comprises the R of each pixel in described target electric energy meter image, G, B tri-Color Channel pixel value, correspondingly, the sharpening pixel value of each pixel obtained comprises the R of each pixel, G, B tri-Color Channel sharpening pixel value, the sharpening pixel value composition sharpening electric energy meter image of all pixels, described image procossing subset is connected to obtain described sharpening electric energy meter image with described sharpening image acquisition subset, and identify electric energy meter reading character region in described sharpening electric energy meter image based on the electric energy meter reference templates prestored, identify based on OCR and determine that in described electric energy meter reading character region, reading exports using the digitized indications as electric energy meter, Zigbee communication subset, for setting up Zigbee communication link with described Zigbee communication interface, wherein, described AT89C51 single-chip microcomputer is after the digitized indications of the electric energy meter sent to each electric energy meter reading terminal by Zigbee communication interface, also data integrity inspection is carried out to the digitized indications of electric energy meter, when determining the data integrity of digitized indications of electric energy meter, the digitized indications of electric energy meter is wirelessly sent to described intelligent meter data recording platform by GPRS communication interface.
More specifically, in described electric energy meter wireless kilowatt meter reading-out system, described haze Concentration Testing subset also comprises static storage cell, and for prestoring comparison table, described comparison table saves haze concentration and haze and removes corresponding relation between intensity.
More specifically, in described electric energy meter wireless kilowatt meter reading-out system, described IMAQ subset also comprises camera lens and filter, and described filter is positioned at camera lens front, and described camera lens is positioned at described CMOS vision sensor front.
More specifically, in described electric energy meter wireless kilowatt meter reading-out system, described CMOS vision sensor is high definition vision sensor, and the resolution of employing is 1920 × 1080.
More specifically, in described electric energy meter wireless kilowatt meter reading-out system, described IMAQ subset also comprises brightness detection unit and floor light unit; Brightness detection unit is for detecting the ambient brightness of described IMAQ subset surrounding environment; Floor light unit is positioned at the top of described IMAQ subset, is connected with described brightness detection unit, determines whether as the IMAQ of described IMAQ subset provides floor light based on described ambient brightness.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:
Fig. 1 is the block diagram of the electric energy meter wireless kilowatt meter reading-out system illustrated according to an embodiment of the present invention.
Fig. 2 is the block diagram of the power module of the electric energy meter wireless kilowatt meter reading-out system illustrated according to an embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings the embodiment of electric energy meter wireless kilowatt meter reading-out system of the present invention is described in detail.
Electric energy meter is used to the instrument measuring electric energy, and also known as kilowatt-hour meter, energy meter, kilowatt-hour table, referring to the instrument measuring various electrical quantities, is the instrument being used for measuring section electric energy aggregate-value sometime specially.
Electric energy meter can be classified as follows: by purposes: active electric energy meter, reactive energy-meter, maximum demand meter, standard electric energy meter, multi tariff time-sharing electric energy meter, prepayment meter (point coin-feed, magnetic card type, electric card type), loss electric energy meter, by operation principle: induction type (mechanical type), state type (electronic type), electromechanical (hybrid); By access power supply natures: alternating-current meter, direct current table; By structure: integral type, split type; By access phase line: single-phase, phase three-wire three, three-phase and four-line electric energy meter; By class of accuracy: common installing type electric energy meter (0.2S, 0.5S, 0.2.0.5.1.0,2.0 grades) and the accurate electric energy meter (0.01,0.05,0.2 grade) of portable type; By installing the mode of connection: direct access, indirectly access type.
The operation principle of electric energy meter is as follows: when electric energy meter access circuit-under-test, just have alternating current to flow through in current coil and potential winding, these two alternating currents produce the magnetic flux of alternation respectively in their iron core; Alternating flux, through aluminium dish, induces eddy current in aluminium dish; Eddy current is subject to again the effect of power in magnetic field, thus makes aluminium dish obtain torque (initiatively moment) and rotate.The power of load consumption is larger, larger by the electric current of current coil, and the eddy current induced in aluminium dish is also larger, and the moment that aluminium dish is rotated is larger.Namely the size of torque follows the power of load consumption to be directly proportional.Power is larger, and torque is also larger, and aluminium dish rotates also faster.When aluminium dish rotates, be subject to again the effect of the braking moment that permanent magnet produces, braking moment is with initiatively moment direction is contrary; The size of braking moment is directly proportional to the rotating speed of aluminium dish, and aluminium dish rotates faster, and braking moment is also larger.When active moment and braking moment reach transient equilibrium, aluminium dish is by uniform rotation.The electric energy that load consumes is directly proportional to the revolution of aluminium dish.When aluminium dish rotates, drive counter, consumed electric energy is indicated.The simple procedure of electric energy meter work that Here it is.
Due to electric energy meter One's name is legion and reading is the important evidence of supplier of electricity charge, therefore, the reading requirement of electric energy meter reading is not only efficient but also accurate.But electric energy meter reading read schemes of the prior art does not accomplish this point.For this reason, the present invention has built a kind of electric energy meter wireless kilowatt meter reading-out system, meets efficient requirement by wireless communication technology, also can carry out the reading of high-precision electric energy meter reading, thus meet above-mentioned requirements by the process of mist elimination haze under realizing haze weather.
Fig. 1 is the block diagram of the electric energy meter wireless kilowatt meter reading-out system illustrated according to an embodiment of the present invention, described system comprises AT89C51 single-chip microcomputer 1, Zigbee communication interface 3, GPRS communication interface 2 and multiple electric energy meter reading terminal 4, the number of multiple electric energy meter reading terminal 4 is n, n be greater than 1 natural number, each electric energy meter reading terminal 4 comprises IMAQ subset and image procossing subset for carrying out IMAQ and image procossing respectively to the reading of corresponding electric energy meter, to obtain the digitized indications of corresponding electric energy meter, AT89C51 single-chip microcomputer 1 is by Zigbee communication interface 3 and the wireless connections of multiple electric energy meter reading terminal 4, to obtain the digitized indications of multiple electric energy meter, and by GPRS communication interface 2 with the wireless connections of far-end intelligent meter data recording platform so that the digitized indications of multiple electric energy meter is wirelessly sent to described intelligent meter data recording platform.
Then, continue to be further detailed the concrete structure of electric energy meter wireless kilowatt meter reading-out system of the present invention.
Described system also comprises: first serial, and between described AT89C51 single-chip microcomputer 1 and described Zigbee communication interface 3, for being connected with described AT89C51 single-chip microcomputer 1 by described Zigbee communication interface 3, described first serial is RS485 serial port module.
Described system also comprises: second serial, and between described AT89C51 single-chip microcomputer 1 and described GPRS communication interface 2, for described GPRS communication interface 2 being connected with described AT89C51 single-chip microcomputer 1, described second serial is RS232 serial port module.
As shown in Figure 2, described system also comprises: power module, comprise solar powered device 5, storage battery 6, diverter switch 7 and electric pressure converter 8, described diverter switch 7 is connected respectively with described solar powered device 5 and described storage battery 6, determine whether be switched to described solar powered device 5 to be powered by described solar powered device 5 according to storage battery 6 dump energy, described electric pressure converter 8 is connected with described diverter switch 7, with the 5V voltage transitions will inputted by diverter switch 7 for 3.3V voltage.
Each electric energy meter reading terminal 4 also comprises with lower component:
Store subset, for prestoring sky upper limit gray threshold and sky lower limit gray threshold, described sky upper limit gray threshold and described sky lower limit gray threshold are for separating of the sky areas of publishing picture in picture, also for prestoring presetted pixel value threshold value, described presetted pixel value threshold value value is between 0 to 255;
Haze Concentration Testing subset, is arranged in air, for detecting the haze concentration of corresponding electric energy meter position in real time, and removes intensity according to haze concentration determination haze, and described haze removes intensity value between 0 to 1;
Described IMAQ subset is a CMOS vision sensor, and carry out IMAQ to obtain target electric energy meter image to the reading of corresponding electric energy meter, the resolution of described target electric energy meter image is 1920 × 1080;
Region dividing subset, be connected respectively with described storage subset and described IMAQ subset, gray processing process is carried out to obtain gray processing target electric energy meter image to described target electric energy meter image, the pixel identification of gray value in described gray processing target electric energy meter image between described sky upper limit gray threshold and described sky lower limit gray threshold is formed gray processing sky sub pattern, described gray processing sky sub pattern is gone out to obtain the non-sky subgraph of gray processing from described gray processing target electric energy meter Iamge Segmentation, the colour non-sky subgraph corresponding with described gray processing non-sky subgraph is obtained based on the position of described gray processing non-sky subgraph in described target electric energy meter image,
Black channel obtains subset, be connected with described Region dividing subset to obtain the non-sky subgraph of described colour, for each pixel in the non-sky subgraph of described colour, calculate its R, G, B tri-Color Channel pixel value, the R of all pixels in described colour non-sky subgraph, G, B tri-extracts the Color Channel at the minimum Color Channel pixel value place of numerical value in Color Channel pixel value as black channel;
Overall air light value obtains subset, be connected to obtain presetted pixel value threshold value with described storage subset, obtain subset with described Region dividing subset and described black channel to be connected respectively to obtain described target electric energy meter image and described black channel, multiple pixels that black channel pixel value in described target electric energy meter image is more than or equal to presetted pixel value threshold value are formed set of pixels to be tested, the gray value air light value as a whole of the pixel of maximum gradation value will be had in described set of pixels to be tested;
Atmospheric scattering light value obtains subset, be connected respectively with described Region dividing subset and described haze Concentration Testing subset, to each pixel of described target electric energy meter image, extract its R, G, in B tri-Color Channel pixel value, minimum value is as target pixel value, use and keep the Gaussian filter EPGF (edge-preservinggaussianfilter) at edge to carry out filtering process to obtain filtered target pixel value to described target pixel value, target pixel value is deducted filtered target pixel value to obtain object pixel difference, EPGF is used to carry out filtering process to obtain filtered target pixel value difference to object pixel difference, filtered target pixel value is deducted filtered target pixel value difference and remove fiducial value to obtain haze, haze is removed intensity and be multiplied by haze removal fiducial value to obtain haze removal threshold value, get haze and remove minimum value in threshold value and target pixel value as comparison reference, get the atmospheric scattering light value of the maximum in comparison reference and 0 as each pixel,
Medium transmission rate obtains subset, obtain subset and described atmospheric scattering light value with described overall air light value to obtain subset and be connected respectively, the atmospheric scattering light value of each pixel is removed value divided by overall air light value to obtain, deducts 1 described except value is to obtain the medium transmission rate of each pixel;
Sharpening image acquisition subset, with described Region dividing subset, described overall air light value obtains subset and is connected respectively with described medium transmission rate acquisition subset, the medium transmission rate of each pixel is deducted to obtain the first difference by 1, described first difference is multiplied by overall air light value to obtain product value, the pixel value of each pixel in described target electric energy meter image is deducted described product value to obtain the second difference, by described second difference divided by the medium transmission rate of each pixel to obtain the sharpening pixel value of each pixel, in described target electric energy meter image, the pixel value of each pixel comprises the R of each pixel in described target electric energy meter image, G, B tri-Color Channel pixel value, correspondingly, the sharpening pixel value of each pixel obtained comprises the R of each pixel, G, B tri-Color Channel sharpening pixel value, the sharpening pixel value composition sharpening electric energy meter image of all pixels,
Described image procossing subset is connected to obtain described sharpening electric energy meter image with described sharpening image acquisition subset, and identify electric energy meter reading character region in described sharpening electric energy meter image based on the electric energy meter reference templates prestored, identify based on OCR and determine that in described electric energy meter reading character region, reading exports using the digitized indications as electric energy meter;
Zigbee communication subset, for setting up Zigbee communication link with described Zigbee communication interface.
Wherein, described AT89C51 single-chip microcomputer 1 is after the digitized indications being received the electric energy meter that each electric energy meter reading terminal 4 sends by Zigbee communication interface 3, also data integrity inspection is carried out to the digitized indications of electric energy meter, when determining the data integrity of digitized indications of electric energy meter, the digitized indications of electric energy meter is wirelessly sent to described intelligent meter data recording platform by GPRS communication interface 2.
Wherein, in the system, described haze Concentration Testing subset can also comprise static storage cell, for prestoring comparison table, described comparison table saves haze concentration and haze and removes corresponding relation between intensity, described IMAQ subset can also comprise camera lens and filter, described filter is positioned at camera lens front, described camera lens is positioned at described CMOS vision sensor front, alternatively, described CMOS vision sensor is high definition vision sensor, the resolution adopted is 1920 × 1080, alternatively, described IMAQ subset also comprises brightness detection unit and floor light unit, brightness detection unit is for detecting the ambient brightness of described IMAQ subset surrounding environment, floor light unit is positioned at the top of described IMAQ subset, is connected with described brightness detection unit, determines whether as the IMAQ of described IMAQ subset provides floor light based on described ambient brightness.
In addition, haze image can realize the mist elimination haze of image by a series of images treatment facility, to obtain the image of sharpening, improves the visibility of image.These image processing equipments perform different image processing functions respectively, based on the principle that haze is formed, reach the effect removing haze.The sharpening process of haze image all has great using value for dual-use field, and military domain comprises military and national defense, remote sensing navigation etc., and civil area comprises road monitoring, target following and automatic Pilot etc.
The process that haze image is formed can be described by atmospheric attenuation process, relation between haze image and real image and sharpening image can be stated by the medium transmission rate of overall air light value and each pixel, namely when known haze image, according to the medium transmission rate of overall air light value with each pixel, sharpening image can be solved.
There are some effective and through verifying means in the solving of medium transmission rate for overall air light value and each pixel, such as, for the medium transmission rate of each pixel, need the atmospheric scattering light value obtaining overall air light value and each pixel, and the atmospheric scattering light value of each pixel can obtain carrying out the Gaussian smoothing filter at twice maintenance edge to the pixel value of each pixel in haze image, therebetween, the intensity that haze is removed is adjustable, and overall air light value (namely makes the black channel value of some pixels very low by the black channel obtaining haze image in haze image, black channel is R, G, one in B tri-Color Channel), in haze image, obtain by finding the maximum pixel of gray value in multiple pixels that searching black channel pixel value is bigger than normal, be about to search out, the gray value air light value as a whole of the pixel that gray value is maximum, participate in the sharpening process of each pixel in haze image.Relation between concrete haze image and real image and sharpening image, and the relation between parameters can see above content.
By the discussion to haze image formation basic theory, build the relation between haze image and sharpening image, by this relation of multiple Parametric Representation, subsequently by the multiple parameter values that obtain and haze image and the higher image of reducible acquisition definition, some statistical means and empirical means have been used in acquisition due to parameter, therefore the image that described definition is higher can not be equal to real image completely, but there is the mist elimination haze effect of certain degree, for the every field operation under haze weather provides effective guarantee.
In addition, CMOS (ComplementaryMetal-Oxide-Semiconductor), Chinese formal name used at school is complementary metal oxide semiconductors (CMOS), and he is originally a kind of important chip in computer system, saves the data that System guides is the most basic.Manufacturing technology and the general computer chip of CMOS do not have difference, mainly utilize the semiconductor that silicon and this two kinds of elements of germanium are made, make it on CMOS, co-exist the semiconductor of band N (band-electricity) and P (band+electricity) level, the electric current that these two complementary effects the produce chip that can be processed is noted down and is interpreted to image.Found that CMOS also can as the imageing sensor in digital photography through processing afterwards.
For the portable use independent of electrical network, the CMOS technology famous with low power consumption characteristic has an obvious advantage: cmos image sensor designs for 5V and 3.3V supply voltage.CCD chip then needs the supply voltage of about 12V, employing electric pressure converter of therefore having to, thus causes power consumption to increase.In total power consumption, another benefit will be brought in control and system function integration to cmos sensor: he eliminates all external connection lines with other semiconductor elements.Nowadays the driver of its high power consumption is abandoned, this is because carry out communicating consumed energy than much lower by the outside implementation of PCB or substrate at chip internal.
Cmos sensor also can be subdivided into passive type element sensor (PassivePixelSensorCMOS) and active pixel sensor (ActivePixelSensorCMOS).
Passive type element sensor (PassivePixelSensor is called for short PPS), be again passive type element sensor, he is made up of a back-biased photodiode and a switching tube.Photodiode is a PN junction be made up of P type semiconductor and N type semiconductor in essence, and he can be equivalent to a back-biased diode and a mos capacitance parallel connection.When switching tube is opened, photodiode is communicated with vertical alignment (Columnbus).The charge integration amplifier reading circuit (Chargeintegratingamplifier) being positioned at alignment end keeps column line voltage to be a constant, when the signal charge of photodiode storage is read out, its voltage is reset to column line voltage level, meanwhile, the electric charge be directly proportional to light signal is converted to electric charge by charge integration amplifier and exports.
Active pixel sensor (ActivePixelSensor is called for short APS), is again active element sensor.Almost while the invention of CMOSPPS dot structure, people recognize very soon in pixel, to introduce the performance that buffer or amplifier can improve pixel, have the amplifier of oneself in CMOSAPS in each pixel.The amplifier transistor being integrated in surface decreases the effective surface area of pixel element, reduces " packaging density ", the incident light of 40% ~ 50% is reflected.Another problem of this transducer is, how to make there is good coupling between the multi-channel amplifier of transducer, and this can be realized preferably by the fixed pattern noise reducing residual level.Because each amplifier in CMOSAPS pixel is only excited, so the power dissipation ratio ccd image sensor of CMOSAPS is also little during this reads.
Adopt electric energy meter wireless kilowatt meter reading-out system of the present invention, the not high technical problem of precision may be there is in haze weather for existing electric energy meter reading ineffective systems, on the one hand, by being combined of two kinds of wireless communication technologys, build a set of the intelligent electric energy meter kilowatt meter reading-out system, electronically substitute traditional manual metering, on the other hand, based on the image mist elimination haze process of atmospheric attenuation model, easily obtain image of checking meter more clearly, improve the accuracy of electric energy meter Recognition of Reading.
Be understandable that, although the present invention with preferred embodiment disclose as above, but above-described embodiment and be not used to limit the present invention.For any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (1)
1. an electric energy meter wireless kilowatt meter reading-out system, it is characterized in that, described system comprises AT89C51 single-chip microcomputer, Zigbee communication interface, GPRS communication interface and multiple electric energy meter reading terminal, each electric energy meter reading terminal comprises IMAQ subset and image procossing subset for carrying out IMAQ and image procossing respectively to the reading of corresponding electric energy meter, to obtain the digitized indications of corresponding electric energy meter, AT89C51 single-chip microcomputer is connected with multiple electric energy meter reading terminal wireless by Zigbee communication interface, to obtain the digitized indications of multiple electric energy meter, and by GPRS communication interface and the wireless connections of far-end intelligent meter data recording platform so that the digitized indications of multiple electric energy meter is wirelessly sent to described intelligent meter data recording platform,
Described system also comprises:
First serial, between described AT89C51 single-chip microcomputer and described Zigbee communication interface, for being connected with described AT89C51 single-chip microcomputer by described Zigbee communication interface, described first serial is RS485 serial port module;
Second serial, between described AT89C51 single-chip microcomputer and described GPRS communication interface, for described GPRS communication interface being connected with described AT89C51 single-chip microcomputer, described second serial is RS232 serial port module;
Power module, comprise solar powered device, storage battery, diverter switch and electric pressure converter, described diverter switch is connected respectively with described solar powered device and described storage battery, determine whether be switched to described solar powered device to be powered by described solar powered device according to storage battery dump energy, described electric pressure converter is connected with described diverter switch, with the 5V voltage transitions will inputted by diverter switch for 3.3V voltage;
Each electric energy meter reading terminal also comprises:
Store subset, for prestoring sky upper limit gray threshold and sky lower limit gray threshold, described sky upper limit gray threshold and described sky lower limit gray threshold are for separating of the sky areas of publishing picture in picture, also for prestoring presetted pixel value threshold value, described presetted pixel value threshold value value is between 0 to 255;
Haze Concentration Testing subset, is arranged in air, for detecting the haze concentration of corresponding electric energy meter position in real time, and removes intensity according to haze concentration determination haze, and described haze removes intensity value between 0 to 1;
Described IMAQ subset is a CMOS vision sensor, and carry out IMAQ to obtain target electric energy meter image to the reading of corresponding electric energy meter, the resolution of described target electric energy meter image is 1920 × 1080;
Region dividing subset, be connected respectively with described storage subset and described IMAQ subset, gray processing process is carried out to obtain gray processing target electric energy meter image to described target electric energy meter image, the pixel identification of gray value in described gray processing target electric energy meter image between described sky upper limit gray threshold and described sky lower limit gray threshold is formed gray processing sky sub pattern, described gray processing sky sub pattern is gone out to obtain the non-sky subgraph of gray processing from described gray processing target electric energy meter Iamge Segmentation, the colour non-sky subgraph corresponding with described gray processing non-sky subgraph is obtained based on the position of described gray processing non-sky subgraph in described target electric energy meter image,
Black channel obtains subset, be connected with described Region dividing subset to obtain the non-sky subgraph of described colour, for each pixel in the non-sky subgraph of described colour, calculate its R, G, B tri-Color Channel pixel value, the R of all pixels in described colour non-sky subgraph, G, B tri-extracts the Color Channel at the minimum Color Channel pixel value place of numerical value in Color Channel pixel value as black channel;
Overall air light value obtains subset, be connected to obtain presetted pixel value threshold value with described storage subset, obtain subset with described Region dividing subset and described black channel to be connected respectively to obtain described target electric energy meter image and described black channel, multiple pixels that black channel pixel value in described target electric energy meter image is more than or equal to presetted pixel value threshold value are formed set of pixels to be tested, the gray value air light value as a whole of the pixel of maximum gradation value will be had in described set of pixels to be tested;
Atmospheric scattering light value obtains subset, be connected respectively with described Region dividing subset and described haze Concentration Testing subset, to each pixel of described target electric energy meter image, extract its R, G, in B tri-Color Channel pixel value, minimum value is as target pixel value, use and keep the Gaussian filter EPGF at edge to carry out filtering process to obtain filtered target pixel value to described target pixel value, target pixel value is deducted filtered target pixel value to obtain object pixel difference, EPGF is used to carry out filtering process to obtain filtered target pixel value difference to object pixel difference, filtered target pixel value is deducted filtered target pixel value difference and remove fiducial value to obtain haze, haze is removed intensity and be multiplied by haze removal fiducial value to obtain haze removal threshold value, get haze and remove minimum value in threshold value and target pixel value as comparison reference, get the atmospheric scattering light value of the maximum in comparison reference and 0 as each pixel,
Medium transmission rate obtains subset, obtain subset and described atmospheric scattering light value with described overall air light value to obtain subset and be connected respectively, the atmospheric scattering light value of each pixel is removed value divided by overall air light value to obtain, deducts 1 described except value is to obtain the medium transmission rate of each pixel;
Sharpening image acquisition subset, with described Region dividing subset, described overall air light value obtains subset and is connected respectively with described medium transmission rate acquisition subset, the medium transmission rate of each pixel is deducted to obtain the first difference by 1, described first difference is multiplied by overall air light value to obtain product value, the pixel value of each pixel in described target electric energy meter image is deducted described product value to obtain the second difference, by described second difference divided by the medium transmission rate of each pixel to obtain the sharpening pixel value of each pixel, in described target electric energy meter image, the pixel value of each pixel comprises the R of each pixel in described target electric energy meter image, G, B tri-Color Channel pixel value, correspondingly, the sharpening pixel value of each pixel obtained comprises the R of each pixel, G, B tri-Color Channel sharpening pixel value, the sharpening pixel value composition sharpening electric energy meter image of all pixels,
Described image procossing subset is connected to obtain described sharpening electric energy meter image with described sharpening image acquisition subset, and identify electric energy meter reading character region in described sharpening electric energy meter image based on the electric energy meter reference templates prestored, identify based on OCR and determine that in described electric energy meter reading character region, reading exports using the digitized indications as electric energy meter;
Zigbee communication subset, for setting up Zigbee communication link with described Zigbee communication interface;
Wherein, described AT89C51 single-chip microcomputer is after the digitized indications of the electric energy meter sent to each electric energy meter reading terminal by Zigbee communication interface, also data integrity inspection is carried out to the digitized indications of electric energy meter, when determining the data integrity of digitized indications of electric energy meter, the digitized indications of electric energy meter is wirelessly sent to described intelligent meter data recording platform by GPRS communication interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510528827.4A CN105118264B (en) | 2015-03-31 | 2015-03-31 | Electric energy meter wireless kilowatt meter reading-out system |
| CN201510149886.0A CN104735418B (en) | 2015-03-31 | 2015-03-31 | Electric energy meter wireless kilowatt meter reading-out system |
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| CN201510149886.0A CN104735418B (en) | 2015-03-31 | 2015-03-31 | Electric energy meter wireless kilowatt meter reading-out system |
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| CN104735418B true CN104735418B (en) | 2015-12-02 |
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| CN201510149886.0A Expired - Fee Related CN104735418B (en) | 2015-03-31 | 2015-03-31 | Electric energy meter wireless kilowatt meter reading-out system |
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| CN105828037B (en) * | 2016-03-30 | 2019-02-15 | 北京工业大学 | A kind of RTU kilowatt meter reading-out system based on digital image understanding |
| CN108460387A (en) * | 2018-03-26 | 2018-08-28 | 国网安徽省电力有限公司检修分公司 | Intelligent electric power meter makes a copy of computing system and method |
| CN108919724A (en) * | 2018-08-09 | 2018-11-30 | 南京梵科智能科技有限公司 | A kind of Automatic meter reading system based on Internet of Things |
| CN112040198A (en) * | 2020-09-16 | 2020-12-04 | 南通天成现代农业科技有限公司 | Intelligent water meter reading identification system and method based on image processing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006107325A (en) * | 2004-10-08 | 2006-04-20 | Tokyo Electric Power Co Inc:The | Electric energy meter reading support device, terminal device and method of supporting electric energy meter reading |
| CN101079094A (en) * | 2007-04-30 | 2007-11-28 | 中国科学院合肥物质科学研究院 | Meter reading identification device for long distance automatic meter reading system |
| CN201955891U (en) * | 2011-01-20 | 2011-08-31 | 浙江海洋学院 | Intelligent direct-reading automatic meter reading system based on image recognition technology |
| CN203399143U (en) * | 2013-06-05 | 2014-01-15 | 广州瀚润计算机信息科技有限公司 | Intelligent monitor system for modern city |
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| CN104735418A (en) | 2015-06-24 |
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