CN206638728U - One kind isolation power voltage line measurement apparatus - Google Patents
One kind isolation power voltage line measurement apparatus Download PDFInfo
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- CN206638728U CN206638728U CN201720230960.6U CN201720230960U CN206638728U CN 206638728 U CN206638728 U CN 206638728U CN 201720230960 U CN201720230960 U CN 201720230960U CN 206638728 U CN206638728 U CN 206638728U
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- 238000002955 isolation Methods 0.000 title claims abstract description 38
- 238000005259 measurement Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 65
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The utility model discloses one kind to isolate power voltage line measurement apparatus, including detection circuit, isolation circuit and singlechip controller；There is the detection circuit detection port and detection output mouth, the isolation circuit to be provided with input port and output port, and the singlechip controller is provided with signal acquisition port；The detection circuit is provided with threshold voltage, and when the voltage waveform of the alternating current line of force is higher than described threshold voltage, detection circuit acts, and is conducted by the isolation circuit to singlechip controller；Singlechip controller measurement obtains the duration △ t and period of time T of the detection circuit；The relevant parameter for obtaining sinusoidal ac is calculated by duration △ t and period of time T.The utility model provides a kind of isolation power voltage line measurement apparatus, has the advantages that circuit realiration is simple, cost is low, small volume, measurement accuracy are high.
Description
Technical field
A kind of voltage measuring apparatus is the utility model is related to, isolates power voltage line measurement apparatus more particularly to one kind.
Background technology
In the prior art, under conditions of being isolated with power line, measure, used if desired for power voltage line
Measurement apparatus generally include the controllers such as isolating transformer, alternating current-direct current signaling conversion circuit and single-chip microcomputer.Isolating transformer will
High voltage alternating current on power line is converted into low voltage signal, and alternating current-direct current signaling conversion circuit filters the low voltage signal of acquisition
The level of direct current signal of the ripple into controllers such as direct current signal, single-chip microcomputers to being obtained detects, and electricity measured by acquisition
The voltage of line of force alternating current.Such voltage measurement structure has that circuit is complex, cost is high, volume is big, measurement accuracy is poor
The problems such as.
Utility model content
The purpose of this utility model is the deficiency for overcoming prior art, there is provided one kind isolation power voltage line measurement dress
Put, have the advantages that circuit realiration is simple, cost is low, small volume, measurement accuracy are high.
Technical scheme is used by the utility model solves its technical problem：One kind isolation power voltage line measurement dress
Put, for detecting the phases line voltage of the alternating current line of force, including detection circuit, isolation circuit and singlechip controller；The detection
There is circuit detection port and detection output mouth, the isolation circuit to be provided with input port and output port, the single-chip microcomputer
Controller is provided with signal acquisition port；
The detection port of the detection circuit is connected in the phase line of the detected alternating current line of force, the inspection of the detection circuit
Survey the input port that output port is connected to the isolation circuit；The output port of the isolation circuit is connected to singlechip controller；
The detection circuit is provided with threshold voltage, when the voltage waveform of the alternating current line of force is higher than described threshold voltage, detection circuit hair
It is lively to make, and conducted by the isolation circuit to singlechip controller；Singlechip controller measurement obtains the detection circuit
Duration △ t and period of time T；
According to the characteristic of alternating current can obtain alternating current sinusoidal expression and relevant parameter expression formula it is as follows：
Wherein, UTBe it is described detection circuit threshold voltage, UmIt is crest voltage, UrmsIt is exactly the electricity of alternating current on power line
It is pressed with valid value.The detection means can be widely applied to electric control system, household electrical appliance, instrument and equipment etc. with Switching Power Supply,
It is simple and easy to use in the device element of singlechip controller.
As a preferred embodiment, the detection circuit voltage checking chip such as including TL431；The REF of the TL431 chips draws
Pin forms the detection port of the detection circuit, and is connected with the divider resistance of the alternating current line of force；The TL431 chips
K pins as it is described detection circuit detection output mouth.
As a preferred embodiment, the isolation circuit includes PC817 optocouplers；2nd pin of the optocoupler is connected to the detection electricity
The detection output mouth on road；The 3rd pin and the singlechip controller of the optocoupler are altogether；4th pin of the optocoupler is connected to institute
Singlechip controller is stated, the 4th pin of optocoupler is also connected on+5V power supply by a resistance.Circuit is carried out using optocoupler
Isolation so that the high-pressure side of circuit and low-pressure side are effectively isolated, safer reliable.
As a preferred embodiment, also including power supply circuit, the power supply circuit is connected with the alternating current line of force, and obtains
Electric energy；The power supply circuit is powered to the detection circuit and the isolation circuit.
As a preferred embodiment, the power supply circuit is Switching Power Supply isolating transformer, and transformation will be isolated to Switching Power Supply
A wherein winding for device is connected with the detection circuit and the isolation circuit, and provides power supply.
The beneficial effects of the utility model are：By the threshold voltage for setting detection circuit so that more than threshold voltage
Electric signal can be just sampled, while according to the characteristic of sinusoidal ac, can be obtained more than the electric signal time of threshold voltage and week
Phase, and by calculating the voltage effective value of alternating current on acquisition crest voltage and power line.Without AC signal is converted to directly
Flow signal, but directly measured according to the characteristic of sinusoidal ac, have circuit realiration is simple, cost is low, small volume, survey
The advantages that accuracy of measurement is high.
The utility model is described in further detail below in conjunction with drawings and Examples；But it is of the present utility model it is a kind of every
Embodiment is not limited to from power voltage line measurement apparatus.
Brief description of the drawings
Fig. 1 is sinusoidal current waveform figure of the present utility model；
Fig. 2 is theory diagram of the present utility model；
Fig. 3 is circuit diagram of the present utility model.
Embodiment
Embodiment
It is shown in Figure 1, a kind of isolation power voltage line measurement apparatus of the present utility model, including detection circuit 1, isolation
Circuit 2 and singlechip controller 4；There is the detection circuit 1 detection port and detection output mouth, the isolation circuit 2 to set
There are input port and output port, the singlechip controller 4 is provided with signal acquisition port；
The detection port of the detection circuit 1 is connected in the phase line of the detected alternating current line of force, the detection circuit 1
Detection output mouth is connected to the input port of the isolation circuit 2；The output port of the isolation circuit 2 is connected to single-chip microcomputer control
Device 4；The detection circuit 1 is provided with threshold voltage, when the voltage waveform of the alternating current line of force is higher than described threshold voltage, detection electricity
Road 1 acts, and is conducted by the isolation circuit 2 to singlechip controller 4；Described in the measurement of singlechip controller 4 obtains
Detect the duration △ t and period of time T of circuit 1；
According to the characteristic of alternating current can obtain alternating current sinusoidal expression and relevant parameter expression formula it is as follows：
Wherein, UTBe it is described detection circuit 1 threshold voltage, UmIt is crest voltage, UrmsAlternating current exactly on power line
Voltage effective value.
Referring to shown in Fig. 2 to Fig. 3, the detection circuit 1 includes TL431 chips and R15, R18, R22, R20 divider resistance,
Described TL431 REF pins are connected to above power line AC_POWER divider resistance, by adjusting the resistance of divider resistance,
The threshold voltage U will be changedT.When the voltage of TL431 REF pins is more than 2.5V, TL431 conductings；The voltage of REF pins is small
When 2.5V, TL431 is not turned on.UTCalculating：
Alternating current is sine wave, when AC_POWER voltage waveforms are higher than described threshold voltage, the conducting of TL431 chips,
When AC_POWER voltage waveforms are less than described detection voltage, TL431 chips are not turned on.
The power supply circuit 3 includes a winding of Switching Power Supply isolating transformer, by described in described winding generation
Detect the power supply vtest required for circuit 1 and the isolation circuit 2.
The isolation circuit 2 includes PC817 optocouplers, R19 resistance, R37 resistance, R39 resistance and C2 electric capacity, high pressure with it is low
Play a part of isolation between pressure；1st pin of the optocoupler is connected to the power supply vtest by resistance R19；The optocoupler
The 2nd pin be connected to it is described detection circuit 1 detection output mouth；3rd pin of the optocoupler is common with the singlechip controller 4
Ground；4th pin of the optocoupler is connected to the AC_ZERO ports of the singlechip controller 4 by R39 resistance, C2 electric capacity, optocoupler
4th pin is also connected to+5V power supplys by R37 resistance.
The present embodiment is connected on 220V power line, and the singlechip controller 4 measures the action of the detection circuit 1
Duration △ t=0.0057S, cycle T=0.02S of power line alternating current, according to described formula 4., calculate power line and submit
Flow the voltage of electricity：
Above-described embodiment is only used for further illustrating a kind of isolation power voltage line measurement apparatus of the present utility model, but this
Utility model is not limited to embodiment, every any letter made according to the technical essence of the utility model to above example
Single modification, equivalent variations and modification, each fall within the protection domain of technical solutions of the utility model.
Claims (5)
1. one kind isolation power voltage line measurement apparatus, for detecting the phases line voltage of the alternating current line of force, it is characterised in that：Including
Detect circuit, isolation circuit and singlechip controller；The detection circuit has a detection port and detection output mouth, it is described every
Input port and output port are provided with from circuit, the singlechip controller is provided with signal acquisition port；
The detection port of the detection circuit is connected in the phase line of the detected alternating current line of force, and the detection of the detection circuit is defeated
Exit port is connected to the input port of the isolation circuit；The output port of the isolation circuit is connected to singlechip controller；It is described
Detection circuit is provided with threshold voltage, and when the voltage waveform of the alternating current line of force is higher than described threshold voltage, detection circuit occurs dynamic
Make, and conducted by the isolation circuit to singlechip controller；Singlechip controller measurement obtains the dynamic of the detection circuit
Make duration △ t and period of time T；
According to the characteristic of alternating current can obtain alternating current sinusoidal expression and relevant parameter expression formula it is as follows：
Wherein, UTBe it is described detection circuit threshold voltage, UmIt is crest voltage, UrmsBe exactly on power line the voltage of alternating current have
Valid value.
A kind of 2. isolation power voltage line measurement apparatus according to claim 1, it is characterised in that：The detection circuit bag
Include the voltage checking chips such as TL431；The REF pins of the TL431 chips form the detection port of the detection circuit, and with institute
The divider resistance for stating the alternating current line of force is connected；Detection output of the K pins of the TL431 chips as the detection circuit
Mouthful.
A kind of 3. isolation power voltage line measurement apparatus according to claim 1, it is characterised in that：The isolation circuit bag
Include PC817 optocouplers；2nd pin of the optocoupler is connected to the detection output mouth of the detection circuit；3rd pin of the optocoupler and institute
State singlechip controller altogether；4th pin of the optocoupler is connected to the singlechip controller, and the 4th pin of optocoupler also passes through one
Resistance is connected on+5V power supply.
A kind of 4. isolation power voltage line measurement apparatus according to claim 1, it is characterised in that：Also include power supply electricity
Road, the power supply circuit is connected with the alternating current line of force, and obtains electric energy；The power supply circuit to it is described detection circuit and
The isolation circuit power supply.
A kind of 5. isolation power voltage line measurement apparatus according to claim 4, it is characterised in that：The power supply circuit is
Switching Power Supply isolating transformer, and by a wherein winding for Switching Power Supply isolating transformer with it is described detection circuit and it is described every
It is connected from circuit, and power supply is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720230960.6U CN206638728U (en) | 2017-03-10 | 2017-03-10 | One kind isolation power voltage line measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720230960.6U CN206638728U (en) | 2017-03-10 | 2017-03-10 | One kind isolation power voltage line measurement apparatus |
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| Publication Number | Publication Date |
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| CN206638728U true CN206638728U (en) | 2017-11-14 |
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| CN201720230960.6U Active CN206638728U (en) | 2017-03-10 | 2017-03-10 | One kind isolation power voltage line measurement apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980040A (en) * | 2017-03-10 | 2017-07-25 | 厦门致杰智能科技有限公司 | Isolate power voltage line measurement apparatus |
-
2017
- 2017-03-10 CN CN201720230960.6U patent/CN206638728U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980040A (en) * | 2017-03-10 | 2017-07-25 | 厦门致杰智能科技有限公司 | Isolate power voltage line measurement apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211130 Address after: 361100 5th floor, building 4, No. 601, Tonghong Road, Tongan District, Xiamen City, Fujian Province Patentee after: BESTTER(XIAMEN) TECHNOLOGY Inc. Address before: 361000 area 06-901, area a, phase III, Jimei District, Xiamen City, Fujian Province Patentee before: Xiamen Moext Intelligent Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |