CN204789956U - Special LED intelligence light detection device of smart electric meter - Google Patents
Special LED intelligence light detection device of smart electric meter Download PDFInfo
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- CN204789956U CN204789956U CN201520454800.0U CN201520454800U CN204789956U CN 204789956 U CN204789956 U CN 204789956U CN 201520454800 U CN201520454800 U CN 201520454800U CN 204789956 U CN204789956 U CN 204789956U
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Abstract
The utility model provides a special LED intelligence light detection device of smart electric meter, produce module, change over switch, signal conversion module, microprocessor, alarm, host computer including a plurality of photocurrents, the photocurrent produce the module including the reflector that connects gradually, optical fiber, the signal conversion module is including the IV converting circuit and the operational amplifier circuit that connect gradually, change over switch's one end is connected to photomultiplier's output, the IV converting circuit input is connected to change over switch's the other end, operational amplifier circuit's output, change over switch, photomultiplier connects microprocessor respectively, microprocessor passes through RS485 bus or USB interface and host computer and realizes data communication. This novel LED signal lamp to equipment carries out non - intervention, non - destruction, independent on -line monitoring, is particularly suitable for the table enterprise of the big production of pipelining in batches.
Description
Technical field
The utility model relates to intelligent electric meter condition monitoring field, specifically intelligent electric meter special LED intelligent lighting pick-up unit.
Background technology
The state that intelligent electric meter runs generally all can be reflected by the LED signal lamp on their panels, in workshop, as the detection operation of intelligent electric meter necessity, require that staff checks one by one to the signal lamp such as meritorious, idle, tripping operation, backlight, discharge LED fault, thus provide effective help to searching other fault of ammeter in time.
Omitting and mistake easily appears in the reasons such as at present, the detection for LED judges, be all observed by human eye, Manual Visual Inspection signal lamp is very time-consuming, and continuous long-time inspection is artificial tired, careless.
Utility model content
In order to solve the problem, the utility model provides intelligent electric meter special LED intelligent lighting pick-up unit, carries out non-intervention, non-demolition, independently on-line monitoring to the LED signal lamp of equipment, is particularly suitable for the table enterprise that pipelining in enormous quantities is produced.
The utility model is by the following technical solutions: intelligent electric meter special LED intelligent lighting pick-up unit, it is characterized in that, comprise some photocurrent generation modules, switch, signal conversion module, microprocessor, alarm, host computer, described photocurrent generation module comprises the reflective mirror connected successively, light transmitting fiber, signal conversion module comprises the I/V change-over circuit and operational amplification circuit that connect successively, the output terminal of photomultiplier connects one end of switch, the other end of switch connects I/V change-over circuit input end, the output terminal of operational amplification circuit, switch, photomultiplier connects microprocessor respectively, microprocessor realizes data communication by RS485 bus or USB interface and host computer.
Further, also comprise FLASH, described FLASH is connected with microprocessor by SPI communication mode.
Further, also comprise display, described display is connected with microprocessor by data line.
Preferably, described reflective mirror adopts nonspherical reflector.
Preferably, described light transmitting fiber adopts reflection-type light transmitting fiber.
Preferably, the model of described microprocessor is Z8S180 chip.
Further, described operational amplification circuit comprises multilevel amplifiers.
Further, described FLASH adopts ferroelectric memory.
Further, described alarm adopts voice guard or audible-visual annunciator
The beneficial effects of the utility model are:
As long as the ammeter with LED is placed on detector correspondence position by 1, non-intervention, non-demolition, independently on-line monitoring are carried out to the LED signal lamp of equipment, the quality of LED components and parts can be found by the state of detection signal lamp, once discovery LED abnormal just with sound, light active reporting to computing machine, therefore, utilize this kind of detecting instrument effectively can depart from the artificial problem detecting generation careless mistake, save manpower, and the speed detected is fast, detect an ammeter in the scope of general 0.5 second to 3 seconds, be particularly suitable for the table enterprise that pipelining in enormous quantities is produced.
2, adopt nonspherical reflector, nonspherical reflector hot spot is little, and spotlight effect is good, can obtain the light of less parallel light beam, not only can obtain maximum light luminance, and can effectively be gathered on light transmitting fiber by light beam, prevents loss.
3, make use of reflection-type optical fiber structure, at inside of optical fibre, require that light transmition must be total reflection, effectively can reduce the loss of light, strengthen the intensity of acquired original signal, thus obtain more accurate, reliable signal.
4, FLASH adopts ferroelectric memory, writing speed and longer serviceable life faster can be provided, due at short notice, need between microprocessor and host computer to carry out a large amount of data interactions, adopt ferroelectric memory, the storage of instant data can be processed in time, simultaneously, in longer serviceable life, expense loss can be reduced further.
Accompanying drawing explanation
Fig. 1 is one-piece construction block diagram of the present utility model;
Fig. 2 is the utility model circuit theory schematic diagram.
Embodiment
As shown in Figure 1, intelligent electric meter special LED intelligent lighting pick-up unit, comprise three photocurrent generation modules, switch, signal conversion module, microprocessor, alarm, FLASH, display, host computer, described photocurrent generation module comprises the reflective mirror connected successively, light transmitting fiber, signal conversion module comprises the I/V change-over circuit and operational amplification circuit that connect successively, the output terminal of photomultiplier connects one end of switch, the other end of switch connects I/V change-over circuit input end, the output terminal of operational amplification circuit, switch, photomultiplier, display connects microprocessor respectively, described FLASH is connected with microprocessor by SPI communication mode, microprocessor realizes data communication by RS485 bus or USB interface and host computer.
Preferably, described reflective mirror adopts nonspherical reflector, and described light transmitting fiber adopts reflection-type light transmitting fiber, and the model of described microprocessor is Z8S180 chip, described operational amplification circuit comprises multilevel amplifiers, and described FLASH adopts ferroelectric memory.
As shown in Figure 2, for needing the LED measured on the left of reflective mirror, corresponding with Fig. 1, LED has three, is meritorious LED, idle LED and tripping operation LED respectively.
S1 is switch, and switch comprises 3 groups of single-pole double-throw switch (SPDT)s, and which passage 3 groups of switches specifically connect, and is decided by Input Address code ABC, and microprocessor OPADD decoded signal selects corresponding passage to open and closedown.
U1 is photomultiplier, photomultiplier transit is based upon in external photoeffect, secondary and electron optics theoretical foundation, combine the features such as high-gain, low noise, high-frequency response and large-signal reception area, be a kind of photosensitive electron tube with high sensitivity and ultrafast time response, the spectral region of ultraviolet, visible and near-infrared region can be operated in.After photon is incided photocathode, due to photoelectric effect, produce photoelectron, then under the acceleration and focussing force of interpolar power plant, produce a large amount of photoelectrons thus output photoelectric stream, form current signal.
U4 is microprocessor Z8S180-QFP (64), embedded digital signal processor, utilize the quantity of state of the digital signal needed for the generation of specific algorithm, be delivered to host computer to carry out analysis and judge, be responsible for the normal operation controlling the equipment such as switch, display, FLASH, alarm simultaneously.
D1, D2, R4, C1, R1, R10 form I/V change-over circuit, because photomultiplier exports faint current signal, if just can carry out detecting utilizing pull-up resistor so current signal will be converted to voltage signal, when pull-up resistor is comparatively large, photo-signal is less, then can affect frequency response and the linearity of photomultiplier, in order to use less pull-up resistor, devise I/V change-over circuit to replace it.
Amplifier U2 and C2, R5 of coordinating with amplifier U2 form one-level operational amplification circuit, and amplifier U3 and R3, R6 of coordinating with amplifier U3 form secondary operational amplification circuit, and R2, R7, C3, R9, C4, R8 mainly play the effect of voltage stabilizing.The voltage signal that conversion exports amplifies by secondary amplifier, and the A/D being convenient to microcontroller can effectively gather.Overcome the situations such as zero point drift, temperature drift, noise voltage, ensure when no signal inputs, output resistance is infinitely great.
The specific implementation process of device is:
Monitored LED light is assembled by reflective mirror, then the light collected is totally reflected in light transmitting fiber and spreads into photomultiplier, microprocessor can by the conducting of programmed control multi-way switch and cut out, selectively open several switches, respective channel selected by the switch be opened, LED light just can enter I/V change-over circuit, convert photo-signal to voltage signal, again through secondary amplifier, voltage signal is amplified, give microprocessor downwards, microprocessor embedded digital signal processor.Utilize specific algorithm generate needed for the quantity of state of digital signal, be delivered to host computer and carry out analysis and judge, when LED light, host computer is then normal by menu display, otherwise for display abnormal.Alarm can be driven to carry out audible alarm or sound and light alarm, in case artificial origin misses the abnormal ammeter of LED display simultaneously.The real time status information of 3 LED signal lamp and the equipment failure state pre-set information can be compared by this instrument, if find monitored equipment operation exception, it just passes to computing machine by Ethernet or RS485 interface.The application software that host computer runs receives alarm packet just can enable network transmission alarm information, notify the timely handling failure of operating personnel, if also can computing machine can not receiving alarm information, warning information can be stored in the Flash memory block of recognizer, and timed sending is until this server database is resumed work, and carries out information back-up.Finally identify the status information of this paths of LEDs: glow color and whether lighting.
The core of whole device realizes principle and is:
The detection of optoelectronic information and collection utilize photon counter principle, incide the photon on photomultiplier transit tube cathode, a series of electric pulse can be caused in the load of photomultiplier, be amplified into after pulse bandwidth filtering circuit filters noise signal through I/V change-over circuit, amplifier, single photon pulses sent in the impulse meter of microprocessor internal and count photon pulse number.
Microprocessor internal acquisition pulse is the principle adopting equal precision measurement, and in measuring process, have two counters to count standard signal and measured signal respectively, detailed process is simultaneously:
First provide gate opening signal (preset gate rising edge), this hour counter does not start counting, but when the rising edge of measured signal by the time arrives, counter just really starts counting.
Then preset closing gate signal (negative edge) then, and counter does not stop counting immediately, but just terminate counting when the rising edge of measured signal by the time arrives, and completes one-shot measurement process.Can find out, actual gate time, τ was strictly inequal with τ 1 preset gate time, but difference is no more than the one-period of measured signal.Being located at once actual gate time τ Counter is Nx to the count value of measured signal, and be Ns to the count value of standard signal, the frequency of standard signal is fs, then the frequency of measured signal is
From formula (1), if ignore the error of mark frequently fs, then the issuable relative error of equally accurate frequency measurement is δ=(| fxc-fx|/fxe) × 100% (2)
Wherein, fxe is the exact value of measured signal frequency.
In the measurements, the start-stop time due to fx counting is all surveyed by the rising of this signal to trigger, to the counting Nx of fx error free (τ=NxTx) in gate time τ;
The counting Ns of fs is differed at most to the error of a number, namely | Δ Ns|≤1, its survey frequency is
fxe＝[Nx/(Ns+ΔNs)]/fs(3)
Formula (1) and (3) are substituted into formula (2), and arrange:
δ＝|ΔNs|/Ns≤1/Ns＝1/(τ·fs)
δ＝|ΔNs|/Ns≤1/Ns＝1/(τ·fs)
As can be seen from the above equation, the relative error of survey frequency and the size of measured signal frequency have nothing to do, only relevant with standard signal frequency with gate time, namely achieve the equal precision measurement of whole test frequency range.
Gate time is longer, and standard frequency is higher, and the relative error of frequency measurement is less.
Standard frequency can produce by good by degree of stability, that precision is high high frequency crystal oscillation device, is ensureing, under the prerequisite that measuring accuracy is constant, to improve standard signal frequency, can make shorten gate time, namely improve test speed.
Except structure described in the utility model, all the other are prior art.
The above is preferred implementation of the present utility model; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also make some improvements and modifications, these improvements and modifications are also regarded as protection domain of the present utility model.
Claims (9)
1. intelligent electric meter special LED intelligent lighting pick-up unit, it is characterized in that, comprise some photocurrent generation modules, switch, signal conversion module, microprocessor, alarm, host computer, described photocurrent generation module comprises the reflective mirror connected successively, light transmitting fiber, signal conversion module comprises the I/V change-over circuit and operational amplification circuit that connect successively, the output terminal of photomultiplier connects one end of switch, the other end of switch connects I/V change-over circuit input end, the output terminal of operational amplification circuit, switch, photomultiplier connects microprocessor respectively, microprocessor realizes data communication by RS485 bus or USB interface and host computer.
2. intelligent electric meter according to claim 1 special LED intelligent lighting pick-up unit, is characterized in that, also comprise FLASH, and described FLASH is connected with microprocessor by SPI communication mode.
3. intelligent electric meter according to claim 1 special LED intelligent lighting pick-up unit, is characterized in that, also comprise display, and described display is connected with microprocessor by data line.
4. the special LED intelligent lighting of the intelligent electric meter according to claim 1-3 any one pick-up unit, is characterized in that, described reflective mirror adopts nonspherical reflector.
5. the special LED intelligent lighting of the intelligent electric meter according to claim 1-3 any one pick-up unit, is characterized in that, described light transmitting fiber adopts reflection-type light transmitting fiber.
6. the special LED intelligent lighting of the intelligent electric meter according to claim 1-3 any one pick-up unit, is characterized in that, the model of described microprocessor is Z8S180 chip.
7. the special LED intelligent lighting of the intelligent electric meter according to claim 1-3 any one pick-up unit, it is characterized in that, described operational amplification circuit comprises multilevel amplifiers.
8. the special LED intelligent lighting of the intelligent electric meter according to claim 1-3 any one pick-up unit, is characterized in that, described FLASH adopts ferroelectric memory.
9. the special LED intelligent lighting of the intelligent electric meter according to claim 1-3 any one pick-up unit, is characterized in that, described alarm adopts voice guard or audible-visual annunciator.
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| CN201520454800.0U CN204789956U (en) | 2015-06-29 | 2015-06-29 | Special LED intelligence light detection device of smart electric meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105137366A (en) * | 2015-06-29 | 2015-12-09 | 中电装备山东电子有限公司 | Intelligent LED light detection device and method specially for intelligent electric meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137366A (en) * | 2015-06-29 | 2015-12-09 | 中电装备山东电子有限公司 | Intelligent LED light detection device and method specially for intelligent electric meter |
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