CN108562803A - A kind of multimeter and method of detection three-phase power supply phase sequence - Google Patents
A kind of multimeter and method of detection three-phase power supply phase sequence Download PDFInfo
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- CN108562803A CN108562803A CN201810675379.4A CN201810675379A CN108562803A CN 108562803 A CN108562803 A CN 108562803A CN 201810675379 A CN201810675379 A CN 201810675379A CN 108562803 A CN108562803 A CN 108562803A
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- 238000000819 phase cycle Methods 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000007493 shaping process Methods 0.000 claims abstract description 54
- 238000012545 processing Methods 0.000 claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract description 24
- 230000005611 electricity Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Phase Differences (AREA)
Abstract
The present invention relates to a kind of multimeters of detection three-phase power supply phase sequence, including：Bleeder circuit, shaping circuit and square-wave, Acquisition Circuit and processing circuit；Wherein, the shaping circuit and square-wave and Acquisition Circuit obtain the divided voltage signal that the bleeder circuit is sent respectively, the shaping circuit and square-wave and Acquisition Circuit connect the processing circuit, the Acquisition Circuit is used to acquire the voltage value and/or frequency values of the divided voltage signal, the voltage value and frequency values that the processing circuit obtains the square-wave signal of the shaping circuit and square-wave and Acquisition Circuit is sent, and for sending out locking signal.The multimeter of heretofore described detection three-phase power supply phase sequence and two test pencils of use of method initiative are detected three-phase power supply phase sequence, test method is simple and wireless artificial judgment and intervention, the cost of independent detection device for phase sequence is saved, and user no longer needs to additionally carry phase sequence detector when in use, it is user-friendly.
Description
Technical field
The invention belongs to detection fields, and in particular to a kind of multimeter and method of detection three-phase power supply phase sequence.
Background technology
Stability, the reliability of network are kept in electric system, be unable to do without net and net between paired running.For this purpose,
Power department defines with meeting network paired running four elements, i.e.,：Voltage is equal, frequency is equal, phase sequence is consistent and phase
Position is identical.In particular for motor etc. since direction of rotation by phase sequence is affected, if phase sequence mistake will lead to electricity
Machine inverts, therefore just very necessary to the detection of phase sequence.Wherein, in order to ensure that phase sequence is consistent, staff is frequently necessary to use
Three-wire type or four-wire type phase-sequence detection instrument measure the phase sequence of three phase mains, carry very inconvenient.And current multimeter
What is be equipped with pincerlike meter is red-black two test pencils, the phase sequence of three phase mains can not be directly detected, to meet three-phase motor or motor
The demand of Phase sequence detection needs to find a kind of scheme that can detect the phase sequence of three phase mains with two lines.
Invention content
In view of the above-mentioned problems, the object of the present invention is to provide a kind of multimeter and method of detection three-phase power supply phase sequence, use
To solve the problems, such as that three-phase power supply phase sequence can not be measured by the multimeter or pincerlike meter of two test pencils in the prior art.
To achieve the above object, the present invention takes following technical scheme：
A kind of multimeter of detection three-phase power supply phase sequence in the present invention, including：Bleeder circuit, shaping circuit and square-wave are adopted
Collector and processing circuit；Wherein, the shaping circuit and square-wave and Acquisition Circuit obtain the bleeder circuit and send respectively
Divided voltage signal, the shaping circuit and square-wave and Acquisition Circuit connect the processing circuit, and the Acquisition Circuit is for adopting
Collect the voltage value and/or frequency values of the divided voltage signal, the processing circuit obtains the square wave letter of the shaping circuit and square-wave
Number and the Acquisition Circuit voltage value and frequency values that send, and for sending out locking signal.
The multimeter of above-mentioned detection three-phase power supply phase sequence, it is preferred that further include：Timer connects the processing circuit, uses
In carrying out timing to the output of the shaping circuit and square-wave according to the divided voltage signal, the processing circuit is additionally operable to described
Timer sends open signal and/or interrupt signal.
The multimeter of above-mentioned detection three-phase power supply phase sequence, it is preferred that further include：Display unit connects the processing circuit,
For showing the locking signal and locking result.
The multimeter of above-mentioned detection three-phase power supply phase sequence, it is preferred that further include：Serial communication modular, for described aobvious
Show transceiving data between unit and the processing circuit.
The multimeter of above-mentioned detection three-phase power supply phase sequence, it is preferred that further include：Black meter pen and red test pencil, wherein described black
Test pencil is fixedly connected with a phase of the three phase mains, and the red test pencil successively connects the other two-phase of the three phase mains.
A kind of method of detection three-phase power supply phase sequence in the present invention, including：
Obtain the first voltage between the first phase and third phase in three phase mains；
The first voltage partial pressure is the first component voltage and the second component voltage, wherein the second component voltage is sent to shaping side
Wave circuit；
The voltage value and frequency values for acquiring first component voltage, according to the frequency values to the shaping circuit and square-wave
Export ON cycle timing；
Judge first component voltage whether be more than threshold voltage, when first component voltage be more than the threshold voltage,
Obtain the second voltage between the second phase and third phase in the three phase mains；
The second voltage partial pressure is third component voltage and the 4th component voltage, wherein the 4th component voltage is sent to described whole
Shape circuit and square-wave；
The voltage value for acquiring the third component voltage, judges whether the third component voltage is more than the threshold voltage；When
When the third component voltage is more than the threshold voltage, the current output level of the shaping circuit and square-wave is read；
The phase sequence of the three phase mains is determined according to the state of the output level.
The method of above-mentioned detection three-phase power supply phase sequence, it is preferred that the threshold voltage is 80V.
The method of above-mentioned detection three-phase power supply phase sequence, it is preferred that the method further includes：When the third component voltage
When more than the threshold voltage, the output opens interrupters of the shaping circuit and square-wave are responded, and read the shaping square wave electricity
The current output level in road.
The method of above-mentioned detection three-phase power supply phase sequence, it is preferred that according to the frequency values to the shaping circuit and square-wave
Output ON cycle timing further comprises：
Start timing when the output of the shaping circuit and square-wave is a rising edge；Wherein, time-count cycle is the frequency
The inverse of value.
The method of above-mentioned detection three-phase power supply phase sequence, it is preferred that the three-phase is obtained according to the state of the output level
The phase sequence of power supply further comprises：
When the output level is low level, the phase sequence of the three phase mains is positive sequence；When the output level is height
When level, the phase sequence of the three phase mains is inverted sequence.
The multimeter of detection three-phase power supply phase sequence in the present invention and two test pencils of use of method initiative are to three-phase electricity
Source phase sequence is detected, and test method is simple and wireless artificial judgment and intervention, has saved the cost of independent detection device for phase sequence,
And user no longer needs to additionally carry phase sequence detector when in use, it is user-friendly.
Description of the drawings
Fig. 1 is a kind of circuit diagram of the multimeter of detection three-phase power supply phase sequence in the embodiment of the present invention；
Fig. 2A is a kind of multimeter schematic diagram of detection three-phase power supply phase sequence in the embodiment of the present invention；
Fig. 2 B are a kind of pincerlike meter schematic diagrames of detection three-phase power supply phase sequence in the embodiment of the present invention；
Fig. 3 is a kind of method flow diagram of detection three-phase power supply phase sequence in the embodiment of the present invention.
Specific implementation mode
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
The multimeter of a kind of detection three-phase power supply phase sequence in the embodiment of the present invention, as shown in Figure 1, including：Bleeder circuit
101, shaping circuit and square-wave 102, Acquisition Circuit 103 and processing circuit 104；Wherein, it the shaping circuit and square-wave 102 and adopts
Collector 103 obtains the divided voltage signal of the transmission of the bleeder circuit 101, the shaping circuit and square-wave 102 and acquisition respectively
Circuit 103 connects the processing circuit 104, the Acquisition Circuit 103 be used to acquire the divided voltage signal voltage value and/or
Frequency values, the voltage value that the processing circuit 104 obtains the square-wave signal of the shaping circuit and square-wave and Acquisition Circuit is sent
And frequency values, and for sending out locking signal.Specifically, when described device starts phase sequence cognition detection, the three phase mains of acquisition
Voltage in L1, L2, L3 between two-phase L1 and L3 and after the partial pressure of bleeder circuit 101, wherein inputing to shaping square wave all the way
The square wave of zero passage shaping is exported after circuit 102, another way inputs to Acquisition Circuit 103,103 collection voltages value of Acquisition Circuit and frequency
Rate value, and it is sent to processing circuit 104.Processing circuit 104 reads the voltage value and is confirmed whether to send according to voltage value
Locking signal.In specific embodiment, when processing circuit 104 reads the voltage value>When 80V, so that it may to judge between two-phase
Connection it is effective, locking signal can be sent at this time, it is meant that the voltage between L2 and L3 can be measured, at this time bleeder circuit
101 by after the voltage between L2 and L3, wherein exporting the side of zero passage shaping after inputing to shaping circuit and square-wave 102 all the way
Wave, another way inputs to Acquisition Circuit 103,103 collection voltages value of Acquisition Circuit and frequency values, and is sent to processing circuit 104.
Processing circuit 104 reads the voltage value and decides whether the level of 102 output of acquisition shaping circuit and square-wave according to voltage value,
The level finally exported according to the shaping circuit and square-wave 102 may determine that the phase sequence of three phase mains.Wherein, work as processing circuit
When twi-read voltage value is both less than 80V, then the processing circuit 104 waits until always when getting suitable voltage value
Just it is triggered.In preferred embodiments of the present invention, the multimeter could alternatively be pincerlike meter or other similar to test pencil, realize
Mode is similar with the present invention, therefore the embodiment of the present invention repeats no more.
The multimeter of the detection three-phase power supply phase sequence through the embodiment of the present invention, can only can by two test pencils
To measure the phase sequence of three phase mains, measurement method is simple and effective, meets the needs of three-phase motor or electric machines test.
The multimeter of detection three-phase power supply phase sequence in the specific embodiment of the invention, preferably, further including：Timer, even
The processing circuit is connect, for carrying out timing, the place to the output of the shaping circuit and square-wave according to the divided voltage signal
Reason circuit is additionally operable to send open signal and/or interrupt signal to the timer.Specifically, measuring three phase mains L1 and L3
Between voltage when, processing circuit 104 captures zero shaping square wave of 102 output of shaping circuit and square-wave, and in the rising when square wave
Along when arriving, open signal is sent to start the timer from processing circuit 104 to timer, the wherein timing of timer is all
Phase is the inverse for the frequency values that Acquisition Circuit 103 acquires.When voltage between measuring L2 and L3, bleeder circuit is detected again
The voltage value of the signal of 101 outputs, when the voltage value>When 80V, processing circuit 104 sends interrupt signal to the timer, this
When processing circuit 104 read the output level of shaping circuit and square-wave 102.When output level is low level, show test result
It is positive sequence；If output level is high level, then it represents that test result is inverted sequence, and after being successfully tested confirmation phase sequence,
The processing circuit 104 locks test result, if measured again, needs to restart the above circuit.
The multimeter of detection three-phase power supply phase sequence in the specific embodiment of the invention, preferably, further including：Display unit,
The processing circuit is connected, for showing the locking signal and locking result.Preferably, display unit can pass through general-purpose
The display screen of table substitutes, and equipment is shown without additional increase.Preferably, the multimeter further includes：Serial communication modular is used
In the transceiving data between the display unit and the processing circuit.
The multimeter of detection three-phase power supply phase sequence in the specific embodiment of the invention, preferably, as shown in Figure 2 A, also wrapping
It includes：Black meter pen and red test pencil, wherein the black meter pen is fixedly connected with a phase of the three phase mains, the red test pencil successively connects
The other two-phase of the three phase mains.Specifically, black meter pen to be fixed on to the L3 of three phase mains, red test pencil meets L1 for the first time；When
Judge that L1 is effective to the connection of L3, then red test pencil is met into L2.When multimeter is replaced with pincerlike meter, Fig. 2 B are may refer to.
The embodiment of the present invention also provides a kind of method of detection three-phase power supply phase sequence, as shown in figure 3, the method includes：
Step 301, the first voltage in three phase mains between the first phase and third phase is obtained；Preferably, ten thousand can be passed through
The first voltage between the first phase and third phase is obtained with two test pencils of table.
Step 302, the first voltage partial pressure is the first component voltage and the second component voltage, wherein the second component voltage is sent
To shaping circuit and square-wave；
Step 303, the voltage value and frequency values for acquiring first component voltage, according to the frequency values to the shaping
The output ON cycle timing of circuit and square-wave；Specifically, the period of cycle is the inverse of the frequency values.
Step 304, judge whether first component voltage is more than threshold voltage, when first component voltage is more than the threshold
Threshold voltage enters step 305, obtains the second voltage between the second phase and third phase in the three phase mains；If first point
When voltage is less than shown threshold voltage, then it represents that connection is invalid.Preferably, the threshold voltage is 80V.When the first component voltage is big
When 80V, the second voltage between the second phase and third phase in the three phase mains is obtained.
Step 306, the second voltage partial pressure is third component voltage and the 4th component voltage, wherein the 4th component voltage is sent
To the shaping circuit and square-wave；
Step 307, the voltage value for acquiring the third component voltage, judges whether the third component voltage is more than the threshold value
Voltage；When the third component voltage is more than the threshold voltage, 308 are entered step, it is current to read the shaping circuit and square-wave
Output level；Preferably, the threshold voltage is 80V.When third component voltage is more than 80V, reads shaping circuit and square-wave and work as
Preceding output level is high level or low level.
Step 309, the phase sequence of the three phase mains is determined according to the state of the output level.That is, implementing in the present invention
If output level is low level in example, indicate that testing result is positive sequence, output level in this way is high level, indicates that testing result is
Inverted sequence finally determines the phase sequence of three phase mains.
In preferred embodiments of the present invention, when judge the first component voltage be more than 80V, obtain the second phase in the three phase mains
Before second voltage between third phase, it is also necessary to send out locking signal, indicate that connection is effective, according to locking signal to described
Second voltage in three phase mains between the second phase and third phase measures.
The method that three-phase power supply phase sequence is detected in the embodiment of the present invention, preferably, the method further includes：When described
When third component voltage is more than the threshold voltage, the output opens interrupters of the shaping circuit and square-wave are responded, and described in reading
The current output level of shaping circuit and square-wave.Preferably, according to the frequency values of the first branch pressure voltage to the shaping circuit and square-wave
Output ON cycle timing, and the period of timing be frequency values inverse, be constantly at this time cycle timing in, be not required to generate
It interrupts；When judging that third component voltage is more than the threshold voltage, shaping circuit and square-wave when opens interrupters respond and read interruption
Current output level is high level or low level, finally determines the phase sequence of three phase mains, while locking test result.
The method that three-phase power supply phase sequence is detected in the embodiment of the present invention, preferably, according to the frequency values to the shaping
The output ON cycle timing of circuit and square-wave further comprises：
Start timing when the output of the shaping circuit and square-wave is a rising edge；Wherein, time-count cycle is the frequency
The inverse of value.
To sum up, the use two of the multimeter of the detection three-phase power supply phase sequence described in the embodiment of the present invention and method initiative
Root test pencil is detected three-phase power supply phase sequence, and test method is simple and wireless artificial judgment and intervention, has saved independent phase sequence
The cost of detection device, and user no longer needs to additionally carry phase sequence detector when in use, it is user-friendly.
The present invention is not limited to above-mentioned preferred forms, anyone can show that other are various under the inspiration of the present invention
The product of form, however, make any variation in its shape or structure, it is every that there is skill identical or similar to the present application
Art scheme, is within the scope of the present invention.
Claims (10)
1. a kind of multimeter of detection three-phase power supply phase sequence, which is characterized in that including：Bleeder circuit, shaping circuit and square-wave, acquisition
Circuit and processing circuit；Wherein, the shaping circuit and square-wave and Acquisition Circuit obtain what the bleeder circuit was sent respectively
Divided voltage signal, the shaping circuit and square-wave and Acquisition Circuit connect the processing circuit, and the Acquisition Circuit is for acquiring
The voltage value and/or frequency values of the divided voltage signal, the processing circuit obtain the square-wave signal of the shaping circuit and square-wave
And the voltage value and frequency values that Acquisition Circuit is sent, and for sending out locking signal.
2. a kind of multimeter of detection three-phase power supply phase sequence according to claim 1, which is characterized in that further include：Periodically
Device connects the processing circuit, for carrying out timing, institute to the output of the shaping circuit and square-wave according to the divided voltage signal
Processing circuit is stated to be additionally operable to send open signal and/or interrupt signal to the timer.
3. a kind of multimeter of detection three-phase power supply phase sequence according to claim 1 or 2, which is characterized in that further include：It is aobvious
Show unit, connect the processing circuit, for showing the locking signal and locking result.
4. a kind of multimeter of detection three-phase power supply phase sequence according to claim 3, which is characterized in that further include：Serial ports
Communication module, for the transceiving data between the display unit and the processing circuit.
5. a kind of multimeter of detection three-phase power supply phase sequence according to claim 1, which is characterized in that further include：Black table
Pen and red test pencil, wherein the black meter pen is fixedly connected with a phase of the three phase mains, the red test pencil successively connects described three
The other two-phase of phase power supply.
6. a kind of method of detection three-phase power supply phase sequence, which is characterized in that the method includes：
Obtain the first voltage between the first phase and third phase in three phase mains；
The first voltage partial pressure is the first component voltage and the second component voltage, wherein the second component voltage is sent to shaping square wave electricity
Road；
The voltage value and frequency values for acquiring first component voltage, the output according to the frequency values to the shaping circuit and square-wave
ON cycle timing；
Judge whether first component voltage is more than threshold voltage, when first component voltage is more than the threshold voltage, acquisition
Second voltage in the three phase mains between the second phase and third phase；
The second voltage partial pressure is third component voltage and the 4th component voltage, wherein the 4th component voltage is sent to the shaping side
Wave circuit；
The voltage value for acquiring the third component voltage, judges whether the third component voltage is more than the threshold voltage；When described
When third component voltage is more than the threshold voltage, the current output level of the shaping circuit and square-wave is read；
The phase sequence of the three phase mains is determined according to the state of the output level.
7. a kind of method of detection three-phase power supply phase sequence according to claim 6, which is characterized in that the threshold voltage is
80V。
8. a kind of method of detection three-phase power supply phase sequence according to claim 7, which is characterized in that the method is further
Including：When the third component voltage is more than the threshold voltage, the output opens interrupters of the shaping circuit and square-wave are responded,
And read the current output level of the shaping circuit and square-wave.
9. a kind of method of detection three-phase power supply phase sequence according to claim 7, which is characterized in that according to the frequency values
The output ON cycle timing of the shaping circuit and square-wave is further comprised：
Start timing when the output of the shaping circuit and square-wave is a rising edge；Wherein, time-count cycle is the frequency values
It is reciprocal.
10. a kind of method of detection three-phase power supply phase sequence according to claim 9, which is characterized in that according to the output
The phase sequence that the state of level obtains the three phase mains further comprises：
When the output level is low level, the phase sequence of the three phase mains is positive sequence；When the output level is high level
When, the phase sequence of the three phase mains is inverted sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810675379.4A CN108562803B (en) | 2018-06-27 | 2018-06-27 | Universal meter and method for detecting phase sequence of three-phase power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810675379.4A CN108562803B (en) | 2018-06-27 | 2018-06-27 | Universal meter and method for detecting phase sequence of three-phase power supply |
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| Publication Number | Publication Date |
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| CN108562803A true CN108562803A (en) | 2018-09-21 |
| CN108562803B CN108562803B (en) | 2024-06-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083329A (en) * | 2020-08-19 | 2020-12-15 | 中车长春轨道客车股份有限公司 | Debugging system and debugging method for judging rotating direction of traction motor of motor train unit |
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| CN112083329A (en) * | 2020-08-19 | 2020-12-15 | 中车长春轨道客车股份有限公司 | Debugging system and debugging method for judging rotating direction of traction motor of motor train unit |
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| Publication number | Publication date |
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| CN108562803B (en) | 2024-06-21 |
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