CN2360856Y - Watt-hour meter pulse converter - Google Patents
Watt-hour meter pulse converter Download PDFInfo
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- CN2360856Y CN2360856Y CN 98204087 CN98204087U CN2360856Y CN 2360856 Y CN2360856 Y CN 2360856Y CN 98204087 CN98204087 CN 98204087 CN 98204087 U CN98204087 U CN 98204087U CN 2360856 Y CN2360856 Y CN 2360856Y
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- hour meter
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Abstract
The utility model provides a watt-hour meter pulse converter, relating to a device of measuring electric power. The utility model is characterized in that the watt-hour meter pulse converter is installed on an outer shell of the existing turntable type watt-hour meter with power or a watt-hour meter without power, and pulse output relevant to the degree number of electricity of the watt-hour meter can be attained; after the utility model is matched with proper post processing equipment, active power, reactive power, power factors, etc. can be measured according to parameters of the watt-hour meter. Thus, a voltage transformer and a current transformer are not needed to be installed again, and the existing watt-hour meter is not needed to be changed, assembled and disassembled.
Description
The present invention relates to a kind of power measurement device, especially relate to a kind of watt-hour meter pulse converter that is used to measure electric power.
For obtaining the electric power numerical value in the electrical network, comprise meritorious magnitude of power and reactive power numerical value, existing power factor meter, power meter or the existing watt-hour meter of pulse output that has are because current data and the voltage data in the needs measurement electrical network, might need to install voltage transformer (VT) and current transformer, even the time-out electric power supply, for the very inconvenience of non-chronicity measuring task.
At the above-mentioned defective of prior art, the utility model has been proposed for obtaining easier, more accurate, cheap electric power measurement device; Therefore, the purpose of this utility model is to propose a kind of watt-hour meter pulse converter, existing metering system is made improvement, and need not to install again voltage transformer (VT) and current transformer, also need not original watt-hour meter is made any change and dismounting, as long as install this watt-hour meter pulse converter simply, cooperate suitable aftertreatment device and watt-hour meter parameter just can calculate active power, reactive power and power factor or the like.
The device of the measurement electric power of proposition of the present utility model is characterized in that this device is installed on the outside of the meritorious or wattless component watt-hour meter of existing rotating disc type and comprises:
One infrared transmitter, the plastic housing outside of the infrared ray of tape pulse that this circuit is launched modulation or wattless component watt-hour meter meritorious by described rotating disc type is radiated on the rotating disk of the meritorious or wattless component watt-hour meter of described rotating disc type;
Concussion of one basic frequency and frequency detection circuit, the basic frequency pulse of this circuit output is delivered to described infrared transmitter through an infrared light-emitting diode driving circuit;
One photoelectricity receives and the signal detecting circuit, is used to receive the infrared ray through described rotating disk reflection;
One signal sensitivity and feedback quantity regulating circuit receive with described photoelectricity and the output terminal of signal detecting circuit links to each other, are used to handle this output signal, and described treated signal shakes as described basic frequency and the input of frequency detection circuit.
By the description to the utility model preferred embodiment, above-mentioned purpose and other advantage of type of the present utility model are apparent with making below in conjunction with accompanying drawing.
In the accompanying drawing:
Fig. 1 is the schematic diagram of unidirectional electrical kilsyth basalt pulse converter;
Fig. 2 is the circuit diagram of unidirectional electrical kilsyth basalt pulse converter;
Fig. 3 is the schematic diagram of two-way watt-hour meter pulse converter;
Fig. 4 is the circuit diagram of two-way watt-hour meter pulse converter;
Fig. 5 is the applicable cases of power factor meter and watt-hour meter pulse converter;
Fig. 6 is the power factor meter general diagram.
For general watt-hour meter one aluminium matter round turntable is arranged all, the mark of a redness or black is arranged on this aluminium circle rotating disk, this mark can be convenient for people to observe the function situation of watt-hour meter outside watt-hour meter.Because rotary speed and measured power have certain corresponding relation, as long as energy measurement goes out rotary speed and just can calculate active power or reactive power.Fig. 1 unidirectional electrical kilsyth basalt pulse converter block diagram is an essential part of forming the utility model watt-hour meter pulse converter, the variation that the infrared ray that utilizes this unidirectional electrical kilsyth basalt pulse converter to detect its ejaculation reflects on rotating disk just can draw the position of mark on the rotating disk and obtains rotary speed.For obtain reliably, the output signal of non-jitter, and can be in the sun, daylight lamp down or flash of light still can stably work down, detecting device is to have adopted the circuit described in Fig. 2 to realize.Need to measure a part of wattless component watt-hour meter that can two-way rotation rotating disk owing to have, so from Fig. 1 and Fig. 2, design the two-way watt-hour meter pulse converter of Fig. 3 and Fig. 4.
In Fig. 3, the reference frequency pulse is delivered to infrared light-emitting diode driving circuit 2 by reference frequency concussion and frequency detection circuit 5, deliver to the infrared ray that infrared transmitter 1 is launched the tape pulse modulation again through these infrared light-emitting diode driving circuit 2 drivings, reflex to photoelectricity through rotating disk and receive and signal detecting circuit 3 and 8, the output signal of photoelectricity reception and signal detecting circuit 3 delivers to signal sensitivity again and feedback quantity regulating circuit 4 carries out the signal sensitivity adjusting and feedback quantity is regulated.This signal sensitivity and feedback quantity regulating circuit 4 also are subjected to the feedback signal of positive-feedback circuit 6 and influence.This signal after signal sensitivity and feedback quantity regulating circuit 4 handled just as the input of reference frequency concussion and frequency detection circuit 5, the driving signal of photoelectricity isolation and the 7 conduct outputs of electric current loop output circuit and the driving signal of positive-feedback circuit 6 conduct feedbacks are delivered in output after this reference frequency concussion and 5 pairs of signals of frequency detection circuit detect respectively, after this photoelectricity reception and 8 receptions of signal detecting circuit and detecting, its output signal delivers to signal sensitivity again and feedback quantity regulating circuit 9 carries out the signal sensitivity adjusting and feedback quantity is regulated as for the pulse modulated infra-red signal that reflexes to photoelectricity reception and signal detecting circuit 8.This signal sensitivity and feedback quantity regulating circuit 9 also are subjected to the feedback signal of positive-feedback circuit 11 and influence.Signal after signal sensitivity and feedback quantity regulating circuit 9 handled just as the input of basic frequency concussion and frequency detection circuit 10, the output after this basic frequency concussion and 10 pairs of signals of frequency detection circuit detect deliver to respectively that photoelectricity is isolated and electric current loop output circuit 12 as the driving signal of output and positive-feedback circuit 11 driving signal as feedback.For avoiding being introduced by power lead the influence of interference and mains voltage variations, the power supply of all parts in the block diagram is all supplied with after mu balanced circuit 13 voltage stabilizings.
In accompanying drawing 4, U1 is a slice frequency detector integrated circuit, and this circuit is selected integrated circuit model LM567 for use, and resistance R 4 one terminates to the pin 5 of U1, the pin 6 of another termination U1 of R4 and the anode of capacitor C 4, the negativing ending grounding of C4.The resistance value of R4 and C4 and capacitance are formed the concussion frequency of control RC oscillating circuit, and this frequency will and be delivered to the pulsed frequency of Q1 as driven for emitting lights diode D1 as the detection frequency reference value of U1.Its connected mode is that the pin 5 of U1 connects R2 one end, the base stage of another termination of R2 Q1, and the grounded emitter of Q1, collector is as output, and collector load is D1 and R1, and the anode of D1 connects positive 9V power supply, negative electrode connecting resistance R1, the collector of another termination of R1 Q1.The pin one of the positive termination U1 of capacitor C 2, negativing ending grounding, the concussion frequency of the numerical value may command U1 of C2 is to the speed of following of incoming frequency.The pin two of the positive termination U1 of capacitor C 3, negativing ending grounding, C3 is as the low-pass filtering electric capacity of U1 output signal.As for photoelectricity receiving circuit aspect, the anode of photodiode D2 connects positive 9V power supply, and negative electrode connects its load, comprises L1 and D3, and L1 is in parallel with D3, and the negative electrode of D3 connects the negative electrode of D2, the plus earth of D3.The signal at L1 two ends is delivered to VR2 and VR1 because of it is in parallel with VR2 and VR1, VR2 connects with VR1, the sliding end output signal of VR1 is regulated through sensitivity and feedback quantity, deliver to the input end pin 3 of U1 through capacitor C 1, have only No. 3 pins of input end to have enough strong and identical with reference frequency signal to exist as U1, No. 8 pins of the output terminal of U1 just have drop-down output, output pin pin 8 and the R3 that is connected in series as for U1, D4, ISO1 is side and ISO2 side connection just just, ISO1 and ISO2 are the photoelectric isolating coupler chip, ISO1 and ISO2 select the chip model for use in this circuit be 4N33, and its first side anode is 1 pin, and negative electrode is 2 pin, R5 and R6 receive inferior side 4 pin and 6 pin of ISO1 and ISO2 respectively, as stablizing its working point.The inferior side of ISO1 and ISO2 is output as 4 pin and 5 pin, and 4 pin are that emitter-base bandgap grading 5 pin are the collection utmost point.The output of whole circuit is isolated and is exported with on-off mode at inferior side 4 pin and 5 pin through photoelectrical coupler ISO2, makes things convenient for other instruments to obtain pulse signal in the electric current loop mode of high noise immunity.U3 is a slice integrated regulator, exports positive 9V, and selecting the integrated circuit model for use is 7809.Fig. 4 top and the bottom are substantially identical connection, no longer heavily cover at this.
When photodiode D2 did not receive the reflected light that is sent by D1 as yet, because the dc voltage drop of inductance L 1 is seldom, supply voltage mainly concentrated on the D2, make it have good working order and extraneous light intensity for it the duty influence seldom.
When photodiode D2 receives the enough strong reflected light that is sent by D1, because reflected light is an impulse form, and because inductance presents high AC impedance for high-frequency AC signal, so the electric pulse signal just can form at the L1 two ends.Deliver to the input end pin 3 of U1 after signal process variable resistor VR2 and the potentiometer VR1 dividing potential drop again through C1, because the pulse signal frequency is identical with reference frequency, output terminal pin 8 at U1 just produces drop-down output, so electric current flow through R3, D4, ISO1, ISO2 are just arranged, so D4 is luminous, the inferior side conducting of ISO1 makes the inferior side conducting of VR2 two terminal shortcircuits, ISO2 to form electric current loop output closed circuit.The short circuit at VR2 two ends whether control will be the key that produces pulse number output accurately, by hereinafter going on to say.
When photodiode D2 becomes when receiving the enough strong reflected light that is sent by D1 from receiving the faint reflected light that is sent by D1, deliver to the input end pin 3 of U1 after signal process VR2 and the VR1 dividing potential drop again, because the input end of enough strong signal through U1 arranged, output terminal pin 8 at U1 just produces drop-down output, with epimere in like manner, so D4 is luminous, the inferior side conducting of inferior side conducting VR2 two terminal shortcircuits of ISO1, ISO2 makes that to form electric current loop output closed circuit.VR2 two terminal shortcircuits are further strengthened the input signal dividing potential drop of U1, formed a positive feedback loop, feedback quantity is directly proportional with the resistance of VR2, this positive feedback loop makes the input signal of U1 and output signal form the hysteresis loop characteristic, even input signal slowly rises and fluctuation, also the reflected light of enhancing can be correctly detected, and edge closed current ring steep, non-jitter can be exported.
When photodiode D2 becomes when receiving the faint reflected light that is sent by D1 from receiving the enough strong reflected light that is sent by D1, because the VR2 two ends are by the inferior side short circuit of ISO1, signal is only just delivered to the input end pin 3 of U1 through the VR1 dividing potential drop, owing to can not keep the input end pin 3 that enough strong signal is given U1, output terminal pin 8 at U1 just can not produce drop-down output again, the R3 so flow through, D4, ISO1, the electric current of ISO2 just disappears, D4 is no longer luminous, the inferior side of ISO1 no longer conducting no longer makes VR2 two terminal shortcircuits, the also no longer conducting of the inferior side of ISO2, the electric current loop output open circuit.Because the VR2 two ends no longer by short circuit, further weaken the input signal dividing potential drop of U1, have formed a positive feedback loop.With epimere in like manner, even input signal slowly descends and fluctuation, also can correctly detect the reflected light that weakens, and can export edge open-circuit current ring steep, non-jitter.
In the two-way watt-hour meter pulse converter circuit of Fig. 4, the concussion frequency of U1 and U2 drives D1 simultaneously with respectively hang oneself Q1 and Q2 of pulse mode, make D1 send the light pulse of two frequencies simultaneously, this measure both can be saved element, the more important thing is and reduce the space of installing, make reflector segment more concentrated,, also can normally be detected even the mark on the aluminium circle rotating disk is shorter.All the other working conditions partly are identical with Fig. 2.On function, the two-way watt-hour meter pulse converter of Fig. 4 is finished two-way measuring ability than unidirectional electrical kilsyth basalt pulse converter adjacent reflective measurement point of adding again of former reflective measurement point on aluminium circle rotating disk of Fig. 2.Wattless component watt-hour meter has used behind the two-way watt-hour meter pulse converter owing to have the reflected light situation output that put at the two-phase ortho position on the rotating disk, just can obtain the change sequence of 4 combinations being made up of this two output.With 0 as no reflection events light, 1 as there being reflected light, and when rotating disk turned round, just going around then had 11,01,00,10 array output, and counter going around then has 11,10,00,01 array output.
The output that these combinations can just be changeed and reverses after handling via a finite state machine is just being changeed and the output of reversing just can and perceptual idlely be dealt with respectively to capacitive reactive power.
Because it is comparatively suitable that finite state machine is finished with software, and the subsequent treatment part that cooperates the watt-hour meter pulse converter to use mainly is made up of microprocessor, and it is more suitable that the finite state machine function is located at further part.In subsequent treatment, paired pulses is accumulated the consumption that just can obtain electric energy, remakes the time is got differential then can to obtain at that time power (or reactive power).In suggestion is handled, obtain the average power of this period divided by the time span of this period with the accumulation of period, get more in short-term when the period, can be used as the instantaneous power value under certain condition, the numerical value after the processing can directly be delivered on microcomputer or other numerical operation instruments by liquid crystal display displays or through serial line interface on demand.
When adopting watt-hour meter pulse converter of the present utility model to measure to use, under normal circumstances, just appropriate the measurement can be installed in two minutes.And this watt-hour meter pulse converter during normal use only needs to do to adjust first, adjusts first and carries out in process of production, need not later on to adjust.Also very easy as if under particular case, needing to adjust, even rough adjustment also can obtain measurement result accurately.On this watt-hour meter pulse converter, be provided with light emitting diode, can show the working order of rotating disk, come into plain view.As for being connected application facet with other instruments, use photoelectricity to isolate integrated circuit and make output element, do the signal transmission with other apparatus with the electric current loop impulse form, antijamming capability is extremely strong.
Adopt watt-hour meter pulse converter of the present utility model, just can measure the numerical value of electric power in the electrical network easily.For example, if in a kind of new power factor meter (comprise and measure active power and reactive power), be provided with and use watt-hour meter pulse converter as described above, directly measure active watt-hour meter and wattless component watt-hour meter, obtain active power and reactive power, obtain applied power after treatment, calculate the ratio of active power and applied power, just draw power factor.This power factor meter is at factory, unit such as hospital and hotel and designing, needs because of the metering power consumption, active watt-hour meter and wattless component watt-hour meter have all been installed in above-mentioned place by electric power supply unit, for this power factor meter, owing to used this watt-hour meter pulse converter, need not the same need to install voltage transformer (VT) and current transformer with other power factor meters, also need not original watt-hour meter is made any change and dismounting, as long as on original rotating disc type watt-hour meter shell, install the watt-hour meter pulse converter that this paper tells about simply, parameter and formula according to watt-hour meter just can draw instantaneous active power, therefore instantaneous reactive power and instantaneous power factor, it is very convenient that wiring is installed.As for the accuracy aspect, from the metering system between watt-hour meter and the watt-hour meter pulse converter, to parameter computing, data processing etc., this power factor meter all is to use digital form to handle, and the error that occurs in the processing procedure can be ignored.The accuracy of measurement result depends primarily on watt-hour meter itself, and the general watt-hour meter of using all meets 2 grade standards of GB3924-83 " exchanging meritorious and reactive energy-meter ", and error is in 3 percent.The applicable cases of this power factor meter and watt-hour meter pulse converter is shown as Fig. 5; Fig. 6 shows the power factor meter general diagram, in the accompanying drawing, active watt-hour meter watt-hour meter pulse converter and wattless component watt-hour meter watt-hour meter pulse converter are directly measured active watt-hour meter and wattless component watt-hour meter respectively, through computing and data processing section and obtain power factor.
Watt-hour meter pulse converter design of the present utility model has anti-interference current ring pulse output, as easy as rolling off a log and other digital devices are used, and for example also can be used as the detection importation of reactive power compensator, maximum power consumption amount controller and power consumption registering instrument etc.
In sum, adopt watt-hour meter pulse converter of the present utility model not only to install easily, and high anti-jamming capacity (comprising that the harmonic current in light interference, the interference of electromagnetic field and the tested electrical network disturbs) is arranged, so its accuracy of reading; Simultaneously because it is simple in structure, make that element is with low cost and be used in combination with other instruments easily etc.
Claims (3)
1. device of measuring electric power is characterized in that this device is installed on the outside of the meritorious or wattless component watt-hour meter of existing rotating disc type and comprises:
One infrared transmitter, the plastic housing outside of the infrared ray of tape pulse that this circuit is launched modulation or wattless component watt-hour meter meritorious by described rotating disc type is radiated on the rotating disk of the meritorious or wattless component watt-hour meter of described rotating disc type;
Concussion of one basic frequency and frequency detection circuit, the basic frequency pulse of this circuit output is delivered to described infrared transmitter through an infrared light-emitting diode driving circuit;
One photoelectricity receives and the signal detecting circuit, is used to receive the infrared ray through described rotating disk reflection;
One signal sensitivity and feedback quantity regulating circuit receive with described photoelectricity and the output terminal of signal detecting circuit links to each other, are used to handle this output signal, and described treated signal shakes as described basic frequency and the input of frequency detection circuit.
2. the device of measurement electric power according to claim 1 is characterized in that described device also comprises:
One photoelectricity is isolated and the electric current loop output circuit, receives the signal that detects through described basic frequency concussion and the frequency detection circuit driving signal as output;
One positive-feedback circuit receives the signal that detects through described basic frequency concussion and the frequency detection circuit driving signal as feedback.
3. the device of measurement electric power according to claim 2 is characterized in that described positive-feedback circuit also links to each other with described signal sensitivity and feedback quantity regulating circuit simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98204087 CN2360856Y (en) | 1998-04-30 | 1998-04-30 | Watt-hour meter pulse converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98204087 CN2360856Y (en) | 1998-04-30 | 1998-04-30 | Watt-hour meter pulse converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2360856Y true CN2360856Y (en) | 2000-01-26 |
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ID=33960767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98204087 Expired - Fee Related CN2360856Y (en) | 1998-04-30 | 1998-04-30 | Watt-hour meter pulse converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2360856Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158220A (en) * | 2010-12-06 | 2011-08-17 | 广东雅达电子股份有限公司 | Method for calculating power by using electric energy pulses |
| CN104680651A (en) * | 2013-11-27 | 2015-06-03 | 哈尔滨市三和佳美科技发展有限公司 | Prepayment electro-optical communication remote transmission gas meter |
| CN109541298A (en) * | 2018-11-29 | 2019-03-29 | 宁波三星智能电气有限公司 | A kind of electric energy meter metering method |
-
1998
- 1998-04-30 CN CN 98204087 patent/CN2360856Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158220A (en) * | 2010-12-06 | 2011-08-17 | 广东雅达电子股份有限公司 | Method for calculating power by using electric energy pulses |
| CN102158220B (en) * | 2010-12-06 | 2015-09-09 | 广东雅达电子股份有限公司 | A kind of method of electrical energy pulse rated output |
| CN104680651A (en) * | 2013-11-27 | 2015-06-03 | 哈尔滨市三和佳美科技发展有限公司 | Prepayment electro-optical communication remote transmission gas meter |
| CN109541298A (en) * | 2018-11-29 | 2019-03-29 | 宁波三星智能电气有限公司 | A kind of electric energy meter metering method |
| CN109541298B (en) * | 2018-11-29 | 2020-11-03 | 宁波三星智能电气有限公司 | Electric energy meter metering method |
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| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |