CN106324372A - Handheld phase detector - Google Patents
Handheld phase detector Download PDFInfo
- Publication number
- CN106324372A CN106324372A CN201610899592.4A CN201610899592A CN106324372A CN 106324372 A CN106324372 A CN 106324372A CN 201610899592 A CN201610899592 A CN 201610899592A CN 106324372 A CN106324372 A CN 106324372A
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- Prior art keywords
- signal processor
- circuit
- digital signal
- big dipper
- signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
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- General Physics & Mathematics (AREA)
- Measuring Phase Differences (AREA)
Abstract
The invention provides a handheld phase detector. An optical coupling input circuit is connected with a signal conditioning circuit which is connected with a digital signal processor, an RTC circuit is in interactive connection with the digital signal processor, an antenna input circuit is connected with a Beidou module which is in interactive connection with the digital signal processor, a Bluetooth module, a display unit and a data storage device are each in interactive connection with the digital signal processor, and a power circuit supplies power to the RTC circuit, the digital signal processor, the Beidou module, the Bluetooth module, the display unit, the data storage device, the optical coupling input circuit and the signal conditioning circuit. A Beidou time signal is received and combined with a second synchronous pulse signal to generate a software clock signal with precision of milliseconds, and the states of three phases are accurately detected.
Description
Technical field
The present invention relates to automobile AC motor and converter field, particularly a kind of hand-held Phase Detector and inspection
Survey method.
Background technology
In automobile AC motor and converter production process, the phase ordered pair equipment of three-phase alternating current properly functioning have to
Close important impact, be not intended to that contrary power supply phase sequence occurs under many circumstances.Before equipment or instrument are debugged, enter
The phase sequence identification that row is correct, to ensure being smoothed out of test, meanwhile, in test process, the three-phase producing converter is just
String phase of ac signal detects, and by measuring the phase contrast of frequency converter output voltage, enters the output characteristics of converter
Ground assessment and the performance verification of motor.
, there is the shortcoming such as erroneous judgement and method of discrimination complexity in prior art detection and the method differentiating phase order of 3-phase AC.
As such as Publication No. CN101320063A, disclosed in the patent of invention entitled " three-phase alternating current phase sequence detection apparatus and method "
Detection method, the method is based on synchronous rotating frame principle, and implementation process is the most complicated.And for example Publication No.
CN200910178268.3, invention entitled " method for distinguishing three-phase alternating current phase sequences " is by periodically gathering three-phase alternating voltage
Value, and judge its vector value on the occasion of or negative value to judge that three-phase alternating current as positive or negative, has in voltage harmonic distortion or phase place
During deviation can not reliable recognition, the phase state of three-phase output cannot be detected simultaneously.
Summary of the invention
For solving above-mentioned technical problem, the invention provides a kind of hand-held Phase Detector, it includes light even input electricity
Road, signal conditioning circuit, RTC circuit, antenna input circuit, Big Dipper module, digital signal processor, power circuit, bluetooth mould
Block, display unit, data storage circuitry；
Described light idol input circuit is connected with signal conditioning circuit, described signal conditioning circuit and digital signal processor
Being connected, described RTC circuit is connected with digital signal processor interactive mode, and described antenna input circuit is connected with Big Dipper module
Connecing, described Big Dipper module is connected with digital signal processor interactive mode, and described bluetooth module, display unit, data storage divide
Not being connected with digital signal processor interactive mode, described power circuit is described RTC circuit, digital signal processor, Big Dipper mould
Block, bluetooth module, display unit, data storage, light idol input circuit, signal conditioning circuit provide power supply.
It is preferred that described antenna input circuit Big Dipper signal is received, amplify, filter after be input to described Big Dipper mould
Block, is transmitted Big Dipper time signal by described Big Dipper module to digital signal processor, simultaneously by second synchronization pulse port to
Digital signal processor provides a precision to be better than the second synchronizing signal of 50ns.
It is preferred that described second synchronizing signal is synchronized to described RTC circuit by the timing of described digital signal processor, described
RTC circuit provides standby clock signal for digital signal processor, when described antenna input circuit does not receives Big Dipper signal,
Described RTC circuit provides clock signal for described digital signal processor.
It is preferred that described three-phase ac signal is inputted by light idol circuit, when AC signal zero crossing, the even cut-off of light,
Produce a pulse signal at its secondary, be input to the interrupting input port of digital processing unit, produce one and trigger signal, counted
Word signal processor collection also records the current temporal information being accurate to millisecond.
It is preferred that the three-phase alternating current zero-crossing timing information that recorded is saved in number by described digital signal processor respectively
According to memory element, after signals collecting terminates, according to the time difference of each group of signal zero passage, calculate phase contrast and the phase sequence of each phase
Information, is shown by described display unit.
It is preferred that the data message of acquisition and recording is sent to outside by bluetooth module by described digital signal processor
Intelligent terminal analyses.
The method have the advantages that
The present invention, by receiving Big Dipper time signal, generates a precision in conjunction with second lock-out pulse letter and reaches the software of Millisecond
Clock signal, when utilizing three-phase ac signal zero passage, the feature of the even cut-off of light, produce a pulse signal at light idol secondary, defeated
Entering the interrupting input port to digital processing unit, produce and trigger signal, this signal is acquired and remembers by digital signal processor
Record the current temporal information being accurate to millisecond.It is saved in data storage cell, after signals collecting terminates, three groups of data is entered
Row is analyzed, and according to the time difference of each group of zero passage, calculates phase contrast and the phase sequence information of each phase, is shown by display unit
Show.
Certainly, the arbitrary product implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, embodiment will be described required use below
Accompanying drawing is briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for ability
From the point of view of the those of ordinary skill of territory, on the premise of not paying creative work, it is also possible to obtain the attached of other according to these accompanying drawings
Figure.
The hand-held Phase Detector composition frame chart that Fig. 1 provides for the embodiment of the present invention；
Light occasionally input and the signal conditioning circuit schematic diagram that Fig. 2 provides for the embodiment of the present invention；
The pulse signal figure of the even output of each phase zero passage time that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, those of ordinary skill in the art obtained under not making creative work premise all other
Embodiment, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, embodiments provide a kind of hand-held Phase Detector, it include light idol input circuit,
Signal conditioning circuit, RTC circuit, antenna input circuit, Big Dipper module, digital signal processor, power circuit, bluetooth module,
Display unit, data storage circuitry；
Described light idol input circuit is connected with signal conditioning circuit, described signal conditioning circuit and digital signal processor
Being connected, described RTC circuit is connected with digital signal processor interactive mode, and described antenna input circuit is connected with Big Dipper module
Connecing, described Big Dipper module is connected with digital signal processor interactive mode, and described bluetooth module, display unit, data storage divide
Not being connected with digital signal processor interactive mode, described power circuit is described RTC circuit, digital signal processor, Big Dipper mould
Block, bluetooth module, display unit, data storage, light idol input circuit, signal conditioning circuit provide power supply.
As in figure 2 it is shown, A, B, C three-phase ac signal is inputted by light idol circuit, when AC signal zero crossing, light is even to be cut
Only, producing a pulse signal at its secondary, as a example by A phase therein, the negative half period of ac input signal passes through resistance R1, light
Even T2 forms loop, and light idol T2 turns on, and during positive half cycle, ac input signal forms loop, light idol T1 by resistance R1, light idol T1
Conducting.During the even conducting of light, the input of R2 and three state buffer U1 is low level, and three state buffer U1 is output as low, works as friendship
Negative half period or the positive half cycle of stream signal terminate, during signal zero passage, and light idol T2 or T1 cut-off, R2 and the input of three state buffer U1
For high level, three state buffer U1 is output as height, resistance R3 produces voltage jump signal Ta0, Ta1, Ta2,
Ta3.And so on.As it is shown on figure 3, B phase is identical with the input principle of C phase, during the even cut-off of the light of B phase and C phase, three state buffer
Input be high level, three state buffer is output as height, resistance produces voltage jump signal Tb0, Tb1,
Tb2, Tb3 and Tc0, Tc1, Tc2, Tc3.Three-phase input skip signal is connect by the three of digital signal processor input ports
Entering, when input signal produces and rises saltus step, trigger processor is once sampled, and is processed accordingly.Enter to
The interrupting input port of digital processing unit, produces one and triggers signal, gathered by digital signal processor.
In the front end of Big Dipper module, there is an antenna input circuit, including GPS double ceramic antenna, radio-frequency front-end low noise partially
Acoustic amplifier, SAW filter, Big Dipper satellite signal is received, amplify, filter after be input to UM220 III Big Dipper mould
Block, is transmitted Big Dipper time signal by SCI interface to digital timing signal by UM220 III Big Dipper module, and it transmits frequency can
To be configured by SCI interface by digital processing unit, when digital signal processor periodically receives UM220 III Big Dipper module
By after the time that SCI interface sends over, by this time as current system time, and this data synchronization updating is arrived
In RTC real-time clock module.When hand-held Phase Detector is operated in indoor or receives the place that can not arrive Big Dipper signal, number
Determine signal processor and do not receive the Big Dipper time, one can be produced and receive timeout signal, after receiving time-out, Digital Signal Processing
Device obtains temporal information between working as from RTC block.
In the inside of digital signal processor, also utilizing software interrupt to generate a soft clock, its temporal resolution is milli
Second precision, when three phase input signals are by the even isolation of light, and in the input port generation rising edge saltus step of digital signal processor
Time, trigger number and determine signal processor generation interrupt signal, record the time value (millisecond value) of soft clock when this saltus step produces, use
After sampling terminates, by this timestamp, data are analyzed computing in digital signal processor.In order to prevent software accumulation by mistake
Difference, causes time value drift, in this programme, utilizes the second lock-out pulse output port output one of UM220 III Big Dipper module
Individual high accuracy 1PPS signal, is connected with the input capture port of digital signal processor, utilizes its rising edge signal to produce
Interrupt updating in soft clock module this synchronizing information, complete the synchronized update to soft clock.
In the outside of digital signal processor, being provided with the ferroelectric memory of a SPI interface, digital signal processor exists
During acquisition phase information, to the data message that will generate, classifying by block, packing is left in internal RAM, ferroelectric memory
Feature is infinitely to write by number of times, is simultaneously written speed fast, can realize the storage of collection limit, data limit, in data in this programme
While collection, the data in RAM are saved in external data memory, after data acquisition terminates, are pressed by outside
Key triggers signal, and the digital signal processor sampled data to being saved in data storage carries out batch and reads, the number of reading
Containing the source of signal, the time of generation, the length of record, check value etc. according to, digital signal processor completes data and criticizes
Amount read and verify correct after, data are analyzed by packet, and analysis result is sent to display unit shows.
Additionally using a low cost in the embodiment of the present invention, the bluetooth module of low-power consumption, by SCI interface and numeral letter
Number processor is connected, and when processor sends information to bluetooth module, module activation also enters duty, and user passes through mobile phone
APP application software Activates Phone bluetooth, and after successful connection, digital signal processor can be by bluetooth module batch by hits
According to or analysis result be sent to cellphone subscriber, data are carried out deeper into analysis.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.Preferred embodiment is the most detailed
Describe all of details, be also not intended to the detailed description of the invention that this invention is only described.Obviously, according to the content of this specification,
Can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is to preferably explain the present invention
Principle and actual application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only
Limited by claims and four corner thereof and equivalent.
Claims (6)
1. a hand-held Phase Detector, it is characterised in that include light idol input circuit, signal conditioning circuit, RTC circuit,
Antenna input circuit, Big Dipper module, digital signal processor, power circuit, bluetooth module, display unit, data storage circuitry；
Described light idol input circuit is connected with signal conditioning circuit, and described signal conditioning circuit is connected with digital signal processor
Connecing, described RTC circuit is connected with digital signal processor interactive mode, and described antenna input circuit is connected with Big Dipper module, institute
State Big Dipper module to be connected with digital signal processor interactive mode, described bluetooth module, display unit, data storage respectively with number
Word signal processor interactive mode connects, and described power circuit is described RTC circuit, digital signal processor, Big Dipper module, bluetooth
Module, display unit, data storage, light idol input circuit, signal conditioning circuit provide power supply.
2. hand-held Phase Detector as claimed in claim 1, it is characterised in that described antenna input circuit is to Big Dipper signal
Be received, amplify, filter after be input to described Big Dipper module, described Big Dipper module transmit the Big Dipper to digital signal processor
Time signal, is better than the second synchronization of 50ns simultaneously by second synchronization pulse port to digital signal processor one precision of offer
Signal.
3. hand-held Phase Detector as claimed in claim 2, it is characterised in that the timing of described digital signal processor is by institute
Stating a second synchronizing signal and be synchronized to described RTC circuit, described RTC circuit provides standby clock signal for digital signal processor,
When described antenna input circuit does not receives Big Dipper signal, described RTC circuit provides clock letter for described digital signal processor
Number.
4. hand-held Phase Detector as claimed in claim 2, it is characterised in that described three-phase ac signal is even by light
Circuit inputs, when AC signal zero crossing, and the even cut-off of light, produce a pulse signal at its secondary, be input to digital processing unit
Interrupting input port, produce one and trigger signal, gathered and record the current millisecond that is accurate to by digital signal processor
Temporal information.
5. hand-held Phase Detector as claimed in claim 4, it is characterised in that described digital signal processor is by record
To three-phase alternating current zero-crossing timing information be saved in data storage cell respectively, after signals collecting terminates, according to each group of signal
The time difference of zero passage, is calculated phase contrast and the phase sequence information of each phase, is shown by described display unit.
6. hand-held Phase Detector as claimed in claim 5, it is characterised in that described digital signal processor will gather
The data message of record is sent to external smart terminal by bluetooth module and analyses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610899592.4A CN106324372A (en) | 2016-10-14 | 2016-10-14 | Handheld phase detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610899592.4A CN106324372A (en) | 2016-10-14 | 2016-10-14 | Handheld phase detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106324372A true CN106324372A (en) | 2017-01-11 |
Family
ID=57817910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610899592.4A Pending CN106324372A (en) | 2016-10-14 | 2016-10-14 | Handheld phase detector |
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Citations (9)
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|---|---|---|---|---|
| CN101713799A (en) * | 2009-09-21 | 2010-05-26 | 杭州之江开关股份有限公司 | Method for distinguishing three-phase alternating current phase sequences |
| CN201513333U (en) * | 2009-03-24 | 2010-06-23 | 上海宏赛自动化电气有限公司 | Device for distinguishing and protecting power phase sequence in comprehensive intelligent control equipment of air compressor |
| CN102004193A (en) * | 2010-09-14 | 2011-04-06 | 徐国治 | Three-phase alternating-current phase sequence detecting method and device thereof |
| CN204556728U (en) * | 2015-03-24 | 2015-08-12 | 威海海泰电子有限公司 | A kind of power panel three-phase ac signal phase detection device |
| CN204575754U (en) * | 2015-04-30 | 2015-08-19 | 南京航洛辉电子科技有限公司 | Three-phase and four-line circuit homophase Discr. |
| CN205210195U (en) * | 2015-11-27 | 2016-05-04 | 深圳市英威腾电气股份有限公司 | Three -phase AC phase sequence detection circuit |
| CN105785143A (en) * | 2016-04-22 | 2016-07-20 | 国家电网公司 | Online low-voltage line phase checking device and phase checking method thereof |
| CN105929258A (en) * | 2016-05-10 | 2016-09-07 | 国网江苏省电力公司电力科学研究院 | Transformer substation starting test wireless nuclear phase debugging method |
| CN206515401U (en) * | 2016-10-14 | 2017-09-22 | 合肥创宇新能源科技有限公司 | A kind of hand-held Phase Detector |
-
2016
- 2016-10-14 CN CN201610899592.4A patent/CN106324372A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201513333U (en) * | 2009-03-24 | 2010-06-23 | 上海宏赛自动化电气有限公司 | Device for distinguishing and protecting power phase sequence in comprehensive intelligent control equipment of air compressor |
| CN101713799A (en) * | 2009-09-21 | 2010-05-26 | 杭州之江开关股份有限公司 | Method for distinguishing three-phase alternating current phase sequences |
| CN102004193A (en) * | 2010-09-14 | 2011-04-06 | 徐国治 | Three-phase alternating-current phase sequence detecting method and device thereof |
| CN204556728U (en) * | 2015-03-24 | 2015-08-12 | 威海海泰电子有限公司 | A kind of power panel three-phase ac signal phase detection device |
| CN204575754U (en) * | 2015-04-30 | 2015-08-19 | 南京航洛辉电子科技有限公司 | Three-phase and four-line circuit homophase Discr. |
| CN205210195U (en) * | 2015-11-27 | 2016-05-04 | 深圳市英威腾电气股份有限公司 | Three -phase AC phase sequence detection circuit |
| CN105785143A (en) * | 2016-04-22 | 2016-07-20 | 国家电网公司 | Online low-voltage line phase checking device and phase checking method thereof |
| CN105929258A (en) * | 2016-05-10 | 2016-09-07 | 国网江苏省电力公司电力科学研究院 | Transformer substation starting test wireless nuclear phase debugging method |
| CN206515401U (en) * | 2016-10-14 | 2017-09-22 | 合肥创宇新能源科技有限公司 | A kind of hand-held Phase Detector |
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