CN103592515B - universal phase identifier - Google Patents
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- CN103592515B CN103592515B CN201310586656.1A CN201310586656A CN103592515B CN 103592515 B CN103592515 B CN 103592515B CN 201310586656 A CN201310586656 A CN 201310586656A CN 103592515 B CN103592515 B CN 103592515B
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Abstract
The open a kind of Universal phase identifier of the present invention, including UA input signal, UB input signal and GND input signal, big signal processing is become small-signal Ua through UA signal bleeder circuit by UA input signal, and Ua is respectively sent to single-chip microcomputer through UA zero passage shaping circuit and UA signal follow circuit respectively and processes circuit；Big signal processing is become small-signal Ub through UB signal bleeder circuit by UB input signal, Ub is respectively sent to single-chip microcomputer through UB zero passage shaping circuit and UB signal follow circuit respectively and processes circuit, single-chip microcomputer processes the time difference of the square-wave signal that circuit is obtained by reading UA zero passage shaping circuit and UB zero passage shaping circuit, obtains UA input signal and the phase angle difference of UB input signal；The ADC signal that single-chip microcomputer processes the ADC signal that obtains according to UA signal follow circuit of circuit and UB signal follow circuit obtains obtains whether side decompression or both sides decompression；The bleeder circuit that described UA signal bleeder circuit and UB signal bleeder circuit are all made up of toggle switch and partial pressure device.
Description
Technical field
The present invention relates to a kind of electrical principle for high-voltage potential indicator phase recognizer and structure.
Background technology
Similar products are by by two electrification display nuclear phase mouth power takings of nuclear phase at present, with voltage inspections such as voltage comparators
Surveying the chip motion device as key, when the voltage difference of two nuclear phase mouths reaches design load, instruction loop is triggered, LED
Lamp bright expression unbalance in phase, LED does not works, and represents phase equilibrium.
In the market, the voltage indicator principle that different manufacturers produces is different, causes under same nominal voltage
Potential indicator nuclear phase mouth voltage magnitude difference is relatively big, by two nuclear phase mouth voltage differences as the characteristic of basis for estimation so that
Phase recognizer on market must be customized, and cannot carry out nuclear phase on the potential indicator of different manufacturers.This design
Following defect is there is with layout:
1. of a great variety because of the high-voltage potential indicator of client, and under rated voltage, nuclear phase mouth magnitude of voltage is different,
The model making current phase recognizer is various, and universal performance is poor, is unfavorable for the large-scale production of product, hands over phase length, cost high
(customized production)；
2. national standard must meet phase identification function and side decompression detection function simultaneously, when nuclear phase mouth voltage is relatively low
Time, the phase recognizer carrying out judging by nuclear phase mouth voltage difference cannot meet requirements above simultaneously；
3. the accuracy of phase identification is low.
To this end, the utility model patent of Application No. 201220687774.2 discloses a kind of handheld digital display nuclear phase
Device, the program includes 2 for a phase input voltage being made into the squaring circuit of square-wave signal, being used for whole for 2 square waves
Shape circuit output square-wave signal carry out phase demodulation output rectangular pulse phase discriminator, for the frequency divider that rectangular pulse is divided,
Pulse after dividing frequency divider compares computing and obtains the single-chip microcomputer of phase difference value, for by phase difference value number
The display that word shows, this patent uses the active phasing tester that operational amplifier is constituted, improves the accuracy of nuclear phase, enhance
Fault-tolerant ability.But carry out scaling down processing, phase contrast through a series of hardware circuit after the square wave reshaping signal that this patent describes
Value calculates complexity, and is likely to result in distorted signals through the signal processing of too many levels；Phase place is only compared by this patent simultaneously,
Detection side decompression or both sides decompression, cannot not realize the versatility of nuclear phase for different electrification displays.
Summary of the invention
Therefore, for above-mentioned problem, the present invention proposes a kind of Universal phase identifier, by changing its internal circuit
Realize principle, reach the general utility functions of a tractor serves several purposes, and meet phase identification function and side decompression detection function simultaneously, carry
The accuracy of high phase identification, thus solve the deficiency of prior art.
In order to solve above-mentioned technical problem, thinking of the present invention is, by change its internal circuit realize former
Reason, introduces Single Chip Microcomputer (SCM) system, uses ADC technology, phase angle to judge, increases toggle switch simultaneously, reach the general of a tractor serves several purposes
Function----same phase recognizer, can realize gamut detection by arranging of some toggle switch, substantially covers
Existing product.It addition, introducing ground signalling, judge to carry out accurate nuclear phase by the phase angle of two tested waveforms.Meanwhile, newly
Control circuit abandon the limitation (cannot judge during low-voltage) of analog circuit, use Single Chip Microcomputer (SCM) system, pass through digital signal
Process, improve motility and the accuracy of judgement of design.It addition, phase equilibrium instruction is separated with unbalance in phase instruction,
Improve the recognizability of phase recognizer.
Concrete, the Universal phase identifier of the present invention, including UA input signal, UB input signal and GND input letter
Number, big signal processing is become small-signal Ua through UA signal bleeder circuit by UA input signal, and this small-signal Ua is through UA zero passage shaping
Circuit sends after being shaped as square-wave signal and processes circuit to single-chip microcomputer, and meanwhile, this small-signal Ua processes through UA signal follow circuit
Rear transmission processes circuit to single-chip microcomputer；Big signal processing is become small-signal Ub through UB signal bleeder circuit by UB input signal, should
Small-signal Ub sends to single-chip microcomputer process circuit, meanwhile, this small-signal Ub after UB zero passage shaping circuit is shaped as square-wave signal
Sending after UB signal follow circuit processes and process circuit to single-chip microcomputer, it is whole through UA zero passage by reading that single-chip microcomputer processes circuit
Square-wave signal that shape circuit obtains and the time difference of square-wave signal obtained through UB zero passage shaping circuit, obtain UA input signal
Phase angle difference with UB input signal；Single-chip microcomputer processes ADC signal and the UB that circuit obtains according to UA signal follow circuit
The ADC signal that signal follow circuit obtains obtains whether side decompression or both sides decompression；GND input signal respectively with UA zero passage
Shaping circuit, UA signal follow circuit, UB zero passage shaping circuit, UB signal follow circuit and single-chip microcomputer process circuit and connect.With
Time, the bleeder circuit that UA signal bleeder circuit and UB signal bleeder circuit are all made up of toggle switch, partial pressure device, it is made
With the little letter of Ua for the UA input signal of amplitudes different under various occasions or UB input signal being processed into respectively identical amplitude
Number/Ub small-signal, the purpose general to reach various occasion, and realize the accuracy of phase identification.
Further, described UA zero passage shaping circuit includes resistance R26, resistance R22, resistance R20, resistance R5, zero passage ratio
Relatively chip U3A, resistance R18, diode D1 and resistance R27, one end of resistance R22 connects another of toggle switch S1, resistance R22
Another termination of one end of resistance R20, one end of resistance R5 and toggle switch S1, resistance R20 is connected after end series resistance R26
GND input signal；The other end of resistance R5 takes over the in-phase input end of zero balancing chip U3A, and Zero-cross comparator chip U3A's is anti-phase
Input termination GND input signal, after the outfan series diode D1 of Zero-cross comparator chip U3A connect resistance R27 one end with
And single-chip microcomputer processes circuit, another termination GND input signal of resistance R27, the two ends of resistance R18 connect Zero-cross comparator core respectively
The outfan of sheet U3A and common port.
Further, described UA signal follow circuit includes operational amplifier U2A and resistance R4, operational amplifier U2A's
In-phase input end connects the outfan of the inverting input concatenation operation amplifier U2A of toggle switch S1, operational amplifier U2A,
The outfan of operational amplifier U2A is also connected with one end and single-chip microcomputer process circuit, the other end ground connection of resistance R4 of resistance R4.
Further, described UB zero passage shaping circuit includes resistance R28, resistance R23, resistance R21, resistance R7, zero passage ratio
Relatively chip U3B, resistance R19, diode D2 and resistance R29, one end of resistance R23 connects another of toggle switch S1, resistance R23
Another termination of one end of resistance R21, one end of resistance R7 and toggle switch S1, resistance R21 is connected after end series resistance R28
GND input signal；The other end of resistance R7 takes over the in-phase input end of zero balancing chip U3B, and Zero-cross comparator chip U3B's is anti-phase
Input termination GND input signal, after the outfan series diode D2 of Zero-cross comparator chip U3B connect resistance R29 one end with
And single-chip microcomputer processes circuit, another termination GND input signal of resistance R29, the two ends of resistance R19 connect Zero-cross comparator core respectively
The outfan of sheet U3B and common port.
Further, described UB signal follow circuit includes operational amplifier U2B and resistance R6, operational amplifier U2B's
In-phase input end connects the outfan of the inverting input concatenation operation amplifier U2B of toggle switch S1, operational amplifier U2B,
The outfan of operational amplifier U2B is also connected with one end and single-chip microcomputer process circuit, the other end ground connection of resistance R6 of resistance R6.
Further, this Universal phase identifier also includes processing power circuit, the monolithic that circuit is connected with single-chip microcomputer
Machine reset circuit, external clock oscillating circuit and LED display circuit.
The phasing tester of the present invention has three input signals: UA input signal, measured signal 1 inputs；UB input signal, tested
Signal 2 inputs, GND input signal, and system under test (SUT) earth signal inputs.Wherein UA input signal, UB input signal are tested two
Individual comparison of signal phase.The process circuit processing circuit and shaping circuit and UB input signal of UA input signal and shaping circuit
Identical.As a example by UB input signal, first with resistance R21, the bleeder circuit of resistance R23, resistance R28 composition, by big signal
It is processed as small-signal, by the sine wave signal of dividing potential drop gained through U3B Zero-cross comparator chip, is converted into square-wave signal PBO_PGD
Export and process circuit to single-chip microcomputer.Same, UA input signal is converted into square-wave signal PAO and exports to single-chip microcomputer process circuit,
Single-chip microcomputer processes the circuit time difference by reading two zero cross signals of PBO_PGD and PAO, available two measured signal (UA
Input signal and UB input signal) phase angle difference.Give it addition, UB input signal exports VBO after operational amplifier U2B
Single-chip microcomputer process circuit is as ADC sampled signal, and meanwhile, UA input signal exports VAO to monolithic after operational amplifier U2A
Machine processes circuit as ADC sampled signal, and single-chip microcomputer can accurately judge measured signal whether side according to two ADC sampled datas
Decompression or both sides decompression.
The resistance R23 setting by toggle switch S1 in circuit, it is possible to achieve multiple combination, can be according to actually used situation
Select different mode of operations, if the amplitude of nuclear phase message UB of tested high-voltage potential indicator is bigger, selected by S1
R23 does not access circuit, then the small-signal Ub ratio obtained by bleeder circuit is less, but amplitude is equal to design load；If tested high pressure
When the amplitude of nuclear phase message UB of potential indicator is less, R23 is selected to access circuit, then bleeder circuit R23 by S1 | | R28
Parallel connection, obtained small-signal Ub large percentage, keep Ub amplitude constant, be also equal to design load, it can be seen that, setting by S1
Put and can realize (UA input signal, the amplitude difference of UB input signal), UA signal bleeder circuit or UB signal under different occasion
Small-signal Ua, Ub amplitude after bleeder circuit processes keeps constant, it is achieved general, thus realizes the function of a tractor serves several purposes.
Existing phase identification system or use by the voltage difference of kernel phase system as unique foundation, it is impossible to truly reflect
, there is serious misjudgment phenomenon in its phase relation；Or only its phase contrast is compared, do not carry out side decompression judgement, no
Meet the relevant regulations of national grid, and processing of circuit is complicated, it is understood that there may be distorted signals, it is judged that inaccurate.In this circuit, quilt
Survey signal and introduce earth signal GND, by two true, complete being incorporated in control system of the waveform by nuclear phase electrical voltage system, and
It is sent to single-chip microcomputer after the most effectively processing with zero cross detection circuit and adc circuit respectively process, can be the most right
Whether the phase relation of measured signal and side decompression, both sides decompression judge accurately；The setting of toggle switch S1, it is achieved
The function of a tractor serves several purposes.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is the circuit theory diagrams of the present invention.
Detailed description of the invention
In conjunction with the drawings and specific embodiments, the present invention is further described.
The present invention, by changing the principle that realizes of the internal circuit of the phase recognizer of prior art, introduces single-chip microcomputer system
System, uses ADC technology, phase angle to judge, increases toggle switch simultaneously, reach the general utility functions of a tractor serves several purposes----same product
Product, can realize gamut detection by arranging of some toggle switch, substantially covers existing product.Connect it addition, introduce
Earth signal, judges to carry out accurate nuclear phase by the phase angle of two tested waveforms.Meanwhile, new control circuit abandons analog circuit
Limitation (cannot judge during low-voltage), use Single Chip Microcomputer (SCM) system, by Digital Signal Processing, improve design motility and
The accuracy judged.It addition, phase equilibrium instruction separated with unbalance in phase instruction, improve the recognizable of phase recognizer
Property.
Concrete, see Fig. 1, the Universal phase identifier of the present invention, including UA input signal, UB input signal and
GND input signal, UA input signal, UB input signal and GND input signal, UA input signal will through UA signal bleeder circuit
Big signal processing becomes small-signal Ua, and this small-signal Ua sends to single-chip microcomputer after UA zero passage shaping circuit is shaped as square-wave signal
Reason circuit, meanwhile, this small-signal Ua sends to single-chip microcomputer process circuit after UA signal follow circuit processes；UB input signal warp
Crossing UB signal bleeder circuit and big signal processing is become small-signal Ub, this small-signal Ub is shaped as square wave letter through UB zero passage shaping circuit
Sending after number and process circuit to single-chip microcomputer, meanwhile, this small-signal Ub sends to single-chip microcomputer after UB signal follow circuit processes
Reason circuit, single-chip microcomputer processes square-wave signal that circuit obtained through UA zero passage shaping circuit by reading and through UB zero passage shaping
The time difference of the square-wave signal that circuit obtains, obtains UA input signal and the phase angle difference of UB input signal；Single-chip microcomputer processes
ADC signal that circuit obtains according to UA signal follow circuit and the ADC signal that UB signal follow circuit obtains obtain whether one
Side decompression or both sides decompression；GND input signal respectively with UA zero passage shaping circuit, UA signal follow circuit, UB zero passage shaping
Circuit, UB signal follow circuit and single-chip microcomputer process circuit and connect.Meanwhile, UA signal bleeder circuit and UB signal bleeder circuit
The bleeder circuit being all made up of toggle switch, partial pressure device, it act as the UA input letter of amplitudes different under various occasions
Number or UB input signal be processed into the Ua small-signal/Ub small-signal of identical amplitude, the mesh general to reach various occasion respectively
, and realize the accuracy of phase identification.It addition, this Universal phase identifier also includes processing what circuit was connected with single-chip microcomputer
Power circuit, reset circuit of SCM, external clock oscillating circuit and LED display circuit.
Seeing Fig. 2, described UA zero passage shaping circuit includes resistance R26, resistance R22, resistance R20, resistance R5, Zero-cross comparator
Chip U3A, resistance R18, diode D1 and resistance R27, one end of resistance R22 connects toggle switch S1, the other end of resistance R22
Another termination GND of one end of resistance R20, one end of resistance R5 and toggle switch S1, resistance R20 is connected after series resistance R26
Input signal；The other end of resistance R5 takes over the in-phase input end of zero balancing chip U3A, and Zero-cross comparator chip U3A's is anti-phase defeated
Enter to terminate GND input signal, after the outfan series diode D1 of Zero-cross comparator chip U3A connect resistance R27 one end and
Single-chip microcomputer processes circuit, and another termination GND input signal of resistance R27, the two ends of resistance R18 connect Zero-cross comparator chip respectively
The outfan of U3A and common port.Zero-cross comparator chip U3A is for being shaped to square-wave signal by UA sine wave signal.
Described UA signal follow circuit includes operational amplifier U2A and resistance R4, the in-phase input end of operational amplifier U2A
Connect the outfan of the inverting input concatenation operation amplifier U2A of toggle switch S1, operational amplifier U2A, operational amplifier
The outfan of U2A is also connected with one end and single-chip microcomputer process circuit, the other end ground connection of resistance R4 of resistance R4.Operational amplifier
U2A realizes the signal processing of UA, processes circuit for single-chip microcomputer and provides ADC signal.
Described UB zero passage shaping circuit include resistance R28, resistance R23, resistance R21, resistance R7, Zero-cross comparator chip U3B,
Resistance R19, diode D2 and resistance R29, one end of resistance R23 connects the other end series resistance of toggle switch S1, resistance R23
Another termination GND input signal of one end of resistance R21, one end of resistance R7 and toggle switch S1, resistance R21 is connected after R28；
The other end of resistance R7 takes over the in-phase input end of zero balancing chip U3B, the anti-phase input termination GND of Zero-cross comparator chip U3B
Input signal, the one end and the single-chip microcomputer that connect resistance R29 after the outfan series diode D2 of Zero-cross comparator chip U3B process
Circuit, another termination GND input signal of resistance R29, the two ends of resistance R19 connect the output of Zero-cross comparator chip U3B respectively
End and common port.Zero-cross comparator chip U3B, for being shaped to square-wave signal by UB sine wave signal.Single-chip microcomputer processes circuit root
Two square-wave signals exported according to UA zero passage shaping circuit and UB zero passage shaping circuit judge its phase contrast.
Described UB signal follow circuit includes operational amplifier U2B and resistance R6, the in-phase input end of operational amplifier U2B
Connect the outfan of the inverting input concatenation operation amplifier U2B of toggle switch S1, operational amplifier U2B, operational amplifier
The outfan of U2B is also connected with one end and single-chip microcomputer process circuit, the other end ground connection of resistance R6 of resistance R6.Operational amplifier
U2B realizes the signal processing of UB, processes circuit for single-chip microcomputer and provides ADC signal.Single-chip microcomputer processes circuit and follows according to UA signal
Two ADC signal of circuit and the output of UB signal follow circuit judge its whether decompression.
Concrete, in foregoing circuit, in power circuit, including battery BT1, this BT1 is built-in 3.6V battery, resistance R24
Form low electric quantity detecting circuit with resistance R25, battery electric quantity is monitored, it is achieved low electricity is reported to the police.Reset circuit of SCM
In, resistance R8 and electric capacity C1 forms RC reset circuit, processes circuit for single-chip microcomputer and provides reset signal.External clock oscillating circuit
In, crystal oscillator XTAL, electric capacity C2 and the outside oscillating circuit of electric capacity C3 composition, process circuit for single-chip microcomputer and clock signal is provided.Signal
In input circuit, there are three input signals: UA input signal, measured signal 1 inputs；UB input signal, measured signal 2 is defeated
Entering, GND input signal, system under test (SUT) earth signal inputs.Wherein UA input signal, UB input signal are tested two phase place ratios
Relatively signal.The process circuit of UA input signal is identical with the process circuit of UB input signal and shaping circuit with shaping circuit.With
As a example by UB input signal, first with resistance R21, the bleeder circuit of resistance R23, resistance R28 composition, it is little by big signal processing
Signal, by the sine wave signal of dividing potential drop gained through U3B Zero-cross comparator chip, is converted into square-wave signal PBO_PGD and exports to list
Sheet machine processes circuit.Same, UA input signal is converted into square-wave signal PAO and exports to single-chip microcomputer process circuit, at single-chip microcomputer
Reason circuit, by reading the time difference of two zero cross signals of PBO_PGD and PAO, can get two measured signal (UA input signals
With UB input signal) phase angle difference.It addition, UB input signal export after operational amplifier U2B VBO to single-chip microcomputer at
Reason circuit is as ADC sampled signal, and meanwhile, UA input signal exports VAO after operational amplifier U2A and processes electricity to single-chip microcomputer
Road is as ADC sampled signal, and single-chip microcomputer can accurately judge measured signal whether side decompression or two according to two ADC sampled datas
Side decompression.
LED display circuit, including light emitting diode L1, light emitting diode L2 and light emitting diode L3, wherein, L1 lamp is bright,
Represent measured signal phase equilibrium (homophase)；L2 lamp is bright, represents measured signal unbalance in phase (out-phase)；L3 lamp is bright, represents electricity
Pond electricity is low.
The resistance R23 setting by toggle switch S1 in circuit, it is possible to achieve multiple combination, can be according to actually used situation
Select different mode of operations, it is achieved general, thus realize the function of a tractor serves several purposes.It addition, existing phase identification system is equal
Use by the voltage difference of kernel phase system as unique foundation, it is impossible to true its phase relation of reflection, there is serious misjudgment phenomenon,
And present invention introduces ground signalling, by two true, complete being incorporated in control system of the waveform by nuclear phase electrical voltage system；Profit
By sine wave characteristics, respectively with zero cross detection circuit and adc circuit to the phase relation of measured signal and whether side decompression, two
Side decompression judges accurately.Meanwhile, the present invention passes through simple zero cross detection circuit, voltage follower circuit, bleeder circuit
Deng application, optimize the whole function of phase recognizer.This utility model circuit is simple, it is easy to accomplish, there is good reality
The property used.
Although specifically showing and describe the present invention in conjunction with preferred embodiment, but those skilled in the art should be bright
In vain, in the spirit and scope of the present invention limited without departing from appended claims, in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (4)
1. Universal phase identifier, it is characterised in that: including UA input signal, UB input signal and GND input signal, UA is defeated
Entering signal, through UA signal bleeder circuit, big signal processing is become small-signal Ua, this small-signal Ua is through UA zero passage shaping circuit shaping
For send after square-wave signal to single-chip microcomputer process circuit, meanwhile, this small-signal Ua through UA signal follow circuit process after send to
Single-chip microcomputer processes circuit；Big signal processing is become small-signal Ub through UB signal bleeder circuit by UB input signal, this small-signal Ub
Sending after UB zero passage shaping circuit is shaped as square-wave signal and process circuit to single-chip microcomputer, meanwhile, this small-signal Ub is through UB signal
Follow circuit sends after processing and processes circuit to single-chip microcomputer, and single-chip microcomputer processes circuit and obtains through UA zero passage shaping circuit by reading
To square-wave signal and the time difference of square-wave signal that obtains through UB zero passage shaping circuit, obtain UA input signal and UB input
The phase angle difference of signal；ADC signal and UB signal that single-chip microcomputer process circuit obtains according to UA signal follow circuit are followed
The ADC signal that circuit obtains obtains whether side decompression or both sides decompression；GND input signal is electric with UA zero passage shaping respectively
Road, UA signal follow circuit, UB zero passage shaping circuit, UB signal follow circuit and single-chip microcomputer process circuit and connect；
The bleeder circuit that described UA signal bleeder circuit and UB signal bleeder circuit are all made up of toggle switch and partial pressure device；
Wherein: described UA zero passage shaping circuit includes resistance R26, resistance R22, resistance R20, resistance R5, Zero-cross comparator chip U3A, electricity
One end of resistance R18, diode D1 and resistance R27, resistance R22 connects the other end series resistance of toggle switch S1, resistance R22
Another termination GND input signal of one end of resistance R20, one end of resistance R5 and toggle switch S1, resistance R20 is connected after R26；
The other end of resistance R5 takes over the in-phase input end of zero balancing chip U3A, the anti-phase input termination GND of Zero-cross comparator chip U3A
Input signal, the one end and the single-chip microcomputer that connect resistance R27 after the outfan series diode D1 of Zero-cross comparator chip U3A process
Circuit, another termination GND input signal of resistance R27, the two ends of resistance R18 connect the output of Zero-cross comparator chip U3A respectively
End and common port；Described UB zero passage shaping circuit includes resistance R28, resistance R23, resistance R21, resistance R7, Zero-cross comparator chip
U3B, resistance R19, diode D2 and resistance R29, one end of resistance R23 connects the other end series connection of toggle switch S1, resistance R23
Another termination GND input of one end of resistance R21, one end of resistance R7 and toggle switch S1, resistance R21 is connected after resistance R28
Signal；The other end of resistance R7 takes over the in-phase input end of zero balancing chip U3B, the inverting input of Zero-cross comparator chip U3B
Connect GND input signal, after the outfan series diode D2 of Zero-cross comparator chip U3B, connect one end and the monolithic of resistance R29
Machine processes circuit, and another termination GND input signal of resistance R29, the two ends of resistance R19 connect Zero-cross comparator chip U3B respectively
Outfan and common port.
Universal phase identifier the most according to claim 1, it is characterised in that: described UA signal follow circuit includes fortune
The in-phase input end calculating amplifier U2A and resistance R4, operational amplifier U2A connects toggle switch S1, and operational amplifier U2A's is anti-
The outfan of phase input concatenation operation amplifier U2A, the outfan of operational amplifier U2A is also connected with one end and the list of resistance R4
Sheet machine processes circuit, the other end ground connection of resistance R4.
Universal phase identifier the most according to claim 1, it is characterised in that: described UB signal follow circuit includes fortune
The in-phase input end calculating amplifier U2B and resistance R6, operational amplifier U2B connects toggle switch S1, and operational amplifier U2B's is anti-
The outfan of phase input concatenation operation amplifier U2B, the outfan of operational amplifier U2B is also connected with one end and the list of resistance R6
Sheet machine processes circuit, the other end ground connection of resistance R6.
Universal phase identifier the most according to claim 1, it is characterised in that: this Universal phase identifier also includes
Power circuit, reset circuit of SCM, external clock oscillating circuit and LED display electricity that circuit is connected is processed with single-chip microcomputer
Road.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310586656.1A CN103592515B (en) | 2013-11-21 | 2013-11-21 | universal phase identifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586656.1A CN103592515B (en) | 2013-11-21 | 2013-11-21 | universal phase identifier |
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| CN103592515B true CN103592515B (en) | 2016-10-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104330630A (en) * | 2014-10-31 | 2015-02-04 | 许继电气股份有限公司 | High-accuracy analog quantity phase difference measuring method |
| CN105929259B (en) * | 2016-06-14 | 2018-09-21 | 上海上力防爆电机集团有限公司 | A kind of Brushless DC Motor Position sensor phase sequence judging circuit and determination method |
| CN108008186B (en) * | 2017-12-08 | 2024-04-05 | 江苏智臻能源科技有限公司 | Non-home intelligent terminal phase configuration device and method |
| CN111856163B (en) * | 2020-07-10 | 2021-05-07 | 大连理工大学 | Non-contact single-rod asynchronous phase checking method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPP355798A0 (en) * | 1998-05-15 | 1998-06-11 | University Of Western Australia, The | Process for the production of ultrafine powders |
| CN2363286Y (en) * | 1999-01-08 | 2000-02-09 | 北京华奥电力设备有限公司 | Three-phase power supply measuring and monitoring instrument |
| CN201845054U (en) * | 2010-09-15 | 2011-05-25 | 马万超 | Multifunctional digital phase detection measuring instrument |
| CN202994903U (en) * | 2012-12-13 | 2013-06-12 | 武汉泰可电气有限公司 | Hand-held digital display phase checking device |
| CN203299274U (en) * | 2013-07-03 | 2013-11-20 | 山东科技大学 | High tension switchgear phase measurement circuit |
| CN203535116U (en) * | 2013-11-21 | 2014-04-09 | 厦门安达兴电气集团有限公司 | Universal phase recognizer |
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