CN207181500U - A kind of lighning proof type AC three-phase pressure sensor - Google Patents
A kind of lighning proof type AC three-phase pressure sensor Download PDFInfo
- Publication number
- CN207181500U CN207181500U CN201720866097.3U CN201720866097U CN207181500U CN 207181500 U CN207181500 U CN 207181500U CN 201720866097 U CN201720866097 U CN 201720866097U CN 207181500 U CN207181500 U CN 207181500U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- current
- phase
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Lighning proof type sensor field is the utility model is related to, specifically a kind of lighning proof type AC three-phase pressure sensor.The utility model includes lightning protection circuit, is connected in series between the live wire of alternating current circuit and zero line, for preventing Lightning disturbance power circuit；Power circuit, input connects the both ends of the lightning protection circuit, for being direct current 12V voltages by alternating current 220V voltage transformation, for being powered for voltage signal processing circuit；Transformer circuit, input connection alternating current 220V voltage, for three-phase voltage signal to be converted to required current signal；Voltage signal processing circuit, input connects the mutual inductor coil, for three road current signal to be converted into three road d. c. voltage signals.Lighning proof type AC three-phase pressure sensor of the present utility model, energy isolation measurement three-phase voltage value, sensor have lightning protection function, and voltage measurement scope is adjustable.
Description
Technical field
Lighning proof type sensor field is the utility model is related to, specifically a kind of lighning proof type AC three-phase voltage sensing
Device.
Background technology
At present, existing AC three-phase pressure sensor completely isolated can not measure exchange Width funtion value, no lightning protection
Function.
Utility model content
For in place of above shortcomings in the prior art, the technical problems to be solved in the utility model is to provide one kind
It is capable of the lighning proof type AC three-phase pressure sensor of completely isolated measurement exchange Width funtion value.
Used technical scheme is the utility model to achieve the above object：A kind of lighning proof type AC three-phase voltage sensing
Device, including：
Lightning protection circuit, it is connected in series between the live wire of alternating current circuit and zero line, for preventing Lightning disturbance power circuit；
Power circuit, input connects the both ends of the lightning protection circuit, for being direct current 12V by alternating current 220V voltage transformation
Voltage, for being powered for voltage signal processing circuit；
Transformer circuit, input connection alternating current 220V voltage, for three-phase voltage signal to be converted to required electric current
Signal；
Voltage signal processing circuit, input connect the mutual inductor coil, for three road current signal to be changed
For three road d. c. voltage signals.
The lightning protection circuit includes the lightning protection special Thermal Cutoffs F1 and piezo-resistance RV1 of series connection.
The power circuit includes：
Transformer, input connect the both ends of the lightning protection circuit, for alternating current 220V voltage step-down is electric to 15V is exchanged
Pressure；
Rectification circuit, input connect the output end of the transformer, in the exchange 15V voltages that are exported to transformer
Negative voltage rectification be forward voltage；
Filter circuit, input connect the output end of the rectification circuit, and the voltage for being exported to rectification circuit is carried out
Filtering；
Voltage-stablizer, input connect the output end of the filter circuit, for exporting the direct current 12V voltages after voltage stabilizing.
The transformer circuit includes current-limiting resistance and mutual inductor coil.
A phase in one end connection alternating current 220V voltage of each current-limiting resistance, the other end are connected in mutual inductor coil
Input, for voltage signal to be converted to required current signal.
The mutual inductor coil includes the first mutual inductor coil, the second mutual inductor coil and the 3rd mutual inductor coil；
The input of first mutual inductor coil connects three current-limiting resistances, the other end point of three current-limiting resistances
Not Lian Jie alternating current 220V voltage A phase voltages, B phase voltages and zero line；
The input of second mutual inductor coil connects three current-limiting resistances, and three current-limiting resistances connect friendship respectively
Flow B phase voltages, C phase voltages and the zero line of 220V voltages；
The input of 3rd mutual inductor coil connects three current-limiting resistances, and three current-limiting resistances connect friendship respectively
Flow C phase voltages, A phase voltages and the zero line of 220V voltages.
The voltage signal processing circuit is three, connects a mutual inductor coil respectively.
The voltage signal processing circuit is two-way operational amplifier.
The utility model has advantages below and beneficial effect：
1. lighning proof type AC three-phase pressure sensor of the present utility model, energy isolation measurement three-phase voltage value, sensor energy
Lightning disturbance sensor circuit is protected, output signal is completely isolated with three-phase alternating current, strong antijamming capability.
2. voltage measurement scope of the present utility model is adjustable, and measurement adjustable extent is wide, and precision is high.
Brief description of the drawings
Fig. 1 is integrated circuit block diagram of the present utility model；
Fig. 2 is the circuit block diagram of power circuit of the present utility model；
Fig. 3 is the circuit theory diagrams of lightning protection circuit of the present utility model and power circuit；
Fig. 4 is the circuit theory diagrams of mutual inductor coil of the present utility model and voltage signal processing circuit；
Fig. 5 is the circuit theory diagrams of terminal interface part of the present utility model.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the utility model.
As shown in figure 1, a kind of lighning proof type AC three-phase pressure sensor of the present utility model, including lightning protection circuit, series connection
It is connected between the live wire of alternating current circuit and zero line, for preventing Lightning disturbance power circuit；Power circuit, input connection institute
The both ends of lightning protection circuit are stated, for being direct current 12V voltages by alternating current 220V voltage transformation, for being supplied for voltage signal processing circuit
Electricity；Transformer circuit, input connection alternating current 220V voltage, for three-phase voltage signal to be converted to required current signal；
Voltage signal processing circuit, input connects the mutual inductor coil, straight for three road current signal to be converted into three tunnels
Flow voltage signal.
As shown in Fig. 2 power circuit of the present utility model includes transformer, rectification circuit, the filter circuit being linked in sequence
And voltage-stablizer.Transformer, input connect the both ends of the lightning protection circuit, for by alternating current 220V voltage step-down to exchanging 15V
Voltage；Rectification circuit, input connect the output end of the transformer, in the exchange 15V voltages that are exported to transformer
Negative voltage rectification is forward voltage；Filter circuit, input connects the output end of the rectification circuit, for rectification circuit
The voltage of output is filtered；Voltage-stablizer, input connect the output end of the filter circuit, for exporting the direct current after voltage stabilizing
12V voltages.
As shown in figure 3, lightning protection circuit of the present utility model is the special Thermal Cutoffs F1 of the lightning protection being connected in series and pressure-sensitive
Resistance RV1, F1 other end connection AC220V power supply phase lines, one end are connected with RV1, RV1 other end connection zero-power line.Institute
State a phase voltage in AC220V live wires and transformer T1 in power circuit is connected with zero line.After alternating current 220V is depressured by T1, connection
Rectifier DB1 into rectification circuit carries out rectification.The output voltage of rectification circuit, which is connected in filter circuit, to be filtered
, filtering clutter signal, filtered voltage is connected to voltage-stablizer VR1, voltage-stablizer VR1 output direct current 12V voltages.
As shown in figure 4, three-phase phase voltage or line voltage respectively by current-limiting resistance R3, R4, R5, R8, R9, R10, R13,
(2mA current signals are converted to after R14, R15 current limliting), then are respectively connecting to mutual inductor coil CT1, CT2, CT3 input (1
Pin and 2 pin).Mutual inductor coil CT1, CT2, CT3 output end (3 pin and 4 pin) are respectively connecting to each road voltage signal processing electricity
Chip U1, U2, U3 in road are low noise high accuracy two-way operational amplifiers, and model is OPA2272, by chip U1, U2, U3
Current signal is converted into three road d. c. voltage signal outputs.
As shown in figure 5, P1, P2 are external connection terminal, P3, P4, P5 and P6 are that internal connection terminal is used in sensor
Connection between each wiring board in portion.
A kind of measurement adjustable extent of lighning proof type AC three-phase pressure sensor of the present utility model is wide, and precision is high, can prevent
Lightning disturbance sensor circuit is protected, output signal is completely isolated with three-phase alternating current, strong antijamming capability.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality
New scope is defined, under the premise of the utility model design spirit is not departed from, this area ordinary skill technical staff couple
The various modifications and improvement that technical solutions of the utility model are made, the guarantor that claims of the present utility model determine all should be fallen into
In the range of shield.
Claims (8)
- A kind of 1. lighning proof type AC three-phase pressure sensor, it is characterised in that including：Lightning protection circuit, it is connected in series between the live wire of alternating current circuit and zero line, for preventing Lightning disturbance power circuit；Power circuit, input connect the both ends of the lightning protection circuit, for being direct current 12V electricity by alternating current 220V voltage transformation Pressure, for being powered for voltage signal processing circuit；Transformer circuit, input connection alternating current 220V voltage, for three-phase voltage signal to be converted to required current signal；Voltage signal processing circuit, input connects the mutual inductor coil, for the electric current for exporting the transformer circuit Signal is converted to three road d. c. voltage signals.
- A kind of 2. lighning proof type AC three-phase pressure sensor according to claim 1, it is characterised in that the lightning protection circuit Lightning protection special Thermal Cutoffs F1 and piezo-resistance RV1 including series connection.
- A kind of 3. lighning proof type AC three-phase pressure sensor according to claim 1, it is characterised in that the power circuit Including：Transformer, input connect the both ends of the lightning protection circuit, for alternating current 220V voltage step-down extremely to be exchanged into 15V voltages；Rectification circuit, input connect the output end of the transformer, for bearing in the exchange 15V voltages that are exported to transformer It is forward voltage to voltage commutation；Filter circuit, input connects the output end of the rectification circuit, for being filtered to the voltage that rectification circuit exports；Voltage-stablizer, input connect the output end of the filter circuit, for exporting the direct current 12V voltages after voltage stabilizing.
- A kind of 4. lighning proof type AC three-phase pressure sensor according to claim 1, it is characterised in that the transformer electricity Road includes current-limiting resistance and mutual inductor coil.
- A kind of 5. lighning proof type AC three-phase pressure sensor according to claim 4, it is characterised in that each current limliting A phase in one end connection alternating current 220V voltage of resistance, the input in other end connection mutual inductor coil, for by voltage Signal is converted to required current signal.
- A kind of 6. lighning proof type AC three-phase pressure sensor according to claim 4, it is characterised in that the transformer line Circle includes the first mutual inductor coil, the second mutual inductor coil and the 3rd mutual inductor coil；The input of first mutual inductor coil connects three current-limiting resistances, and the other end of three current-limiting resistances connects respectively Connect the A phase voltages, B phase voltages and zero line of alternating current 220V voltage；The input of second mutual inductor coil connects three current-limiting resistances, and three current-limiting resistances connect exchange respectively B phase voltages, C phase voltages and the zero line of 220V voltages；The input of 3rd mutual inductor coil connects three current-limiting resistances, and three current-limiting resistances connect exchange respectively C phase voltages, A phase voltages and the zero line of 220V voltages.
- A kind of 7. lighning proof type AC three-phase pressure sensor according to claim 6, it is characterised in that the voltage signal Process circuit is three, connects a mutual inductor coil respectively.
- A kind of 8. lighning proof type AC three-phase pressure sensor according to claim 1 or 7, it is characterised in that the voltage Signal processing circuit is two-way operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720866097.3U CN207181500U (en) | 2017-07-17 | 2017-07-17 | A kind of lighning proof type AC three-phase pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720866097.3U CN207181500U (en) | 2017-07-17 | 2017-07-17 | A kind of lighning proof type AC three-phase pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207181500U true CN207181500U (en) | 2018-04-03 |
Family
ID=61737067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720866097.3U Expired - Fee Related CN207181500U (en) | 2017-07-17 | 2017-07-17 | A kind of lighning proof type AC three-phase pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207181500U (en) |
-
2017
- 2017-07-17 CN CN201720866097.3U patent/CN207181500U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207114664U (en) | A kind of electric energy quality monitoring system | |
| CN102830266B (en) | Phase discriminating circuit of residual current phase | |
| CN103399258B (en) | Based on the travelling wave ranging front end analogue amount collection plate of high-precision hall effect | |
| CN202721656U (en) | After current phase demodulation circuit | |
| CN207181500U (en) | A kind of lighning proof type AC three-phase pressure sensor | |
| CN208258144U (en) | A kind of positive alternating current sampling circuit altogether with output voltage clamper | |
| CN205038257U (en) | Electric alternating current that asks for keeps apart changer | |
| CN204479558U (en) | Intelligent gas acquisition probe | |
| CN203981742U (en) | A kind of three-phase alternating current Acquisition Circuit | |
| CN103197132A (en) | Three-model redundant (TMR) digital current sensor | |
| CN205958641U (en) | Current detection circuit | |
| CN207301219U (en) | Electrical energy measurement verification current loop open circuit warning device | |
| CN206611169U (en) | Three phase electric machine overcurrent protective device | |
| CN205982421U (en) | Smart electric meter of wifi communication | |
| CN207424062U (en) | A kind of electric meter box capable of realizing electricity theft prevention alarm | |
| CN205691660U (en) | A kind of power input to a machine counting circuit | |
| CN202872380U (en) | Distribution reactive compensation monitoring device | |
| CN204439242U (en) | A kind of temperature detection and overheating protection circuit | |
| CN206313652U (en) | A kind of overload protection arrangement of Switching Power Supply | |
| CN204101184U (en) | Infrared temperature measurement system in a kind of intelligent JP cabinet | |
| CN205103391U (en) | Ultrahigh precision quick response direct current normalizing device circuit | |
| CN204241539U (en) | A kind of electricity isolation module circuit | |
| CN203278180U (en) | Simple electronic backup protective device of alternate current breaker | |
| CN203643505U (en) | Single-phase intelligent electrical measuring instrument | |
| CN205608153U (en) | Current conversion circuit that three -phase synchronous motor used |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180403 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |