CN205427091U - Ammeter and live wire detection circuitry - Google Patents
Ammeter and live wire detection circuitry Download PDFInfo
- Publication number
- CN205427091U CN205427091U CN201521098697.7U CN201521098697U CN205427091U CN 205427091 U CN205427091 U CN 205427091U CN 201521098697 U CN201521098697 U CN 201521098697U CN 205427091 U CN205427091 U CN 205427091U
- Authority
- CN
- China
- Prior art keywords
- pipe
- live wire
- microprocessor
- testing circuit
- ammeter
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire Alarms (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model provides an ammeter and live wire detection circuitry, includes: the antenna for respond to live wire sexual periodicity signal and provide the detectable signal, and amplifying unit for enlarge this detectable signal and handle and provide can be by the detected signal of microprocessor's port identification. The utility model discloses can detect out live wire and zero line effectively connects the situation of turning over, the security that improves the ammeter.
Description
Technical field
This utility model is directed to use with alternating current and accesses and the electrical equipment of output, especially relates to ammeter.
Background technology
Alternating current is used to access and in the electrical equipment of output current, such as ammeter, for safety and unification, live wire has specification with the mode of connection of zero line, but it is sometimes the most first-class due to artificial origin and electric wire color, there will be live wire and zero line does not has according to specification wiring, i.e. both connect anti-situation, and this can serve potential safety hazard by band.
Utility model content
Technical problem to be solved in the utility model is to overcome the deficiency existing for above-mentioned prior art, and proposes a kind of ammeter and live wire testing circuit, it is possible to effectively detects that live wire and zero line connect anti-situation, improves the safety of ammeter.
This utility model proposes a kind of live wire testing circuit for above-mentioned technical problem, comprising: antenna, for sensing the cyclical signal of live wire and providing detectable signal；And amplifying unit, for being amplified this detectable signal processing and be given can be by the detection signal of the port identification of microprocessor.
In certain embodiments, this amplifying unit includes the three-stage amplifier being made up of three transistors.
In certain embodiments, these three transistor is NPN pipe, it is divided into the first pipe of mutually cascade, the second pipe and the 3rd pipe, wherein, the base stage of this first pipe is connected with this antenna, the base stage of this second pipe is connected with the emitter-base bandgap grading of this first pipe, and the base stage of the 3rd pipe is connected with the emitter-base bandgap grading of this second pipe, the detection signal described in colelctor electrode offer of the 3rd pipe.
In certain embodiments, the emitter grounding of the 3rd pipe, the colelctor electrode of this first pipe connects power supply with the colelctor electrode of this second pipe.
In certain embodiments, the colelctor electrode of the 3rd pipe connects power supply by current-limiting resistance.
This utility model also proposes a kind of ammeter for above-mentioned technical problem, the alarm unit including microprocessor and being connected with this microprocessor and above-mentioned live wire testing circuit, this detection signal can be judged by this microprocessor, and controls the offer wiring error warning of this alarm unit accordingly.
Compared with prior art, ammeter of the present utility model and live wire testing circuit, the antenna of detectable signal is given by being provided for dexterously sensing the cyclical signal of live wire, and for being amplified this detectable signal processing and be given can be by the amplifying unit of the detection signal of the port identification of microprocessor, can effectively detect that live wire and zero line connect anti-situation, improve the safety of ammeter.
Accompanying drawing explanation
Fig. 1 is the block diagram signal of ammeter of the present utility model and electric lines of force.
Fig. 2 is the circuit signal of live wire testing circuit of the present utility model and electric lines of force.
Wherein, description of reference numerals is as follows: 10 ammeter 20 electric lines of force 1 live wire testing circuit 2 microprocessor 3 alarm unit 11 antenna 12 amplifying units.
Detailed description of the invention
Below in conjunction with the accompanying drawing of this specification, preferred embodiment of the present utility model is given elaboration further.
See the block diagram signal that Fig. 1, Fig. 1 are ammeter of the present utility model and Alternating Current Power Supply line.The utility model proposes a kind of ammeter 10, comprising: microprocessor 2 and the alarm unit 3 being connected with this microprocessor 2 and live wire testing circuit 1, the detection signal that this live wire testing circuit 1 provides can be judged by this microprocessor 2, and control this alarm unit 3 accordingly and provide wiring error to report to the police.Wherein, this live wire testing circuit 1 includes: antenna 11, for experiencing the cyclical signal of electric lines of force 20 and providing detectable signal；And amplifying unit 12, for being amplified this detectable signal processing and be given can be by the detection signal of the port identification of microprocessor 2.
See the circuit signal that Fig. 2, Fig. 2 are live wire testing circuit of the present utility model and live wire.This antenna 11 is plain antenna.This amplifying unit 12 includes the three-stage amplifier being made up of three transistors Q1, Q2, Q3.These three transistor Q1, Q2, Q3 are NPN pipe, are divided into the first pipe Q1, the second pipe Q2 and the 3rd pipe Q3 of mutually cascade.Wherein, the base stage of this first pipe Q1 is connected with this antenna 11, and the base stage of this second pipe Q2 is connected with the emitter-base bandgap grading of this first pipe Q1, and the base stage of the 3rd pipe Q3 is connected with the emitter-base bandgap grading of this second pipe Q2, the detection signal CP_Detect described in colelctor electrode offer of the 3rd pipe Q3.The emitter grounding GND of the 3rd pipe Q3, the colelctor electrode of this first pipe Q1 meets power supply VCC with the colelctor electrode of this second pipe Q2.The colelctor electrode of the 3rd pipe Q3 meets power supply VCC by current-limiting resistance R1.
When electric lines of force 20 is live wire, antenna 11 can sense the 50Hz cyclical signal on live wire, after three transistors Q1, Q2, Q3 amplify, output detections signal CP_Detect is to microprocessor 2, and microprocessor 2 is judged as that wiring is correct, does not the most do any warning；When electric lines of force 20 is zero line, antenna 11 does not sense any signal, three transistors Q1, Q2, Q3 keep cut-off state, signal is not had to export to microprocessor 2, microprocessor 2 is judged as that wiring is incorrect, now microprocessor 2 controls output warning, i.e. alarm unit 3 can be reported to the police, and the event of wiring error can be recorded and upload to terminal.In the present embodiment, this alarm unit 3 can include LCD display and be exclusively used in the LED display lamp that wiring error is reported to the police, and wiring error can be tipped out by LCD display, also can be tipped out by LED display lamp.
Compared with prior art, ammeter of the present utility model and live wire testing circuit, the antenna 11 of detectable signal is given by being provided for dexterously sensing the cyclical signal of live wire, and for being amplified this detectable signal processing and be given can be by the amplifying unit 12 of the detection signal of the port identification of microprocessor 2, can effectively detect that live wire and zero line connect anti-situation, improve the safety of ammeter 10.
Foregoing is only preferred embodiment of the present utility model; it is not intended to limit embodiment of the present utility model; those of ordinary skill in the art are according to central scope of the present utility model and spirit; corresponding flexible or amendment can be carried out very easily, therefore protection domain of the present utility model should be as the criterion with the protection domain required by claims.
Claims (6)
1. a live wire testing circuit, it is characterised in that including: antenna, for sensing the cyclical signal of live wire and providing detectable signal；And amplifying unit, for being amplified this detectable signal processing and be given can be by the detection signal of the port identification of microprocessor.
2. according to the live wire testing circuit described in claim 1, it is characterised in that this amplifying unit includes the three-stage amplifier being made up of three transistors.
3. according to the live wire testing circuit described in claim 2, it is characterized in that, these three transistor is NPN pipe, it is divided into the first pipe of mutually cascade, the second pipe and the 3rd pipe, wherein, the base stage of this first pipe is connected with this antenna, and the base stage of this second pipe is connected with the emitter-base bandgap grading of this first pipe, the base stage of the 3rd pipe is connected with the emitter-base bandgap grading of this second pipe, the detection signal described in colelctor electrode offer of the 3rd pipe.
4., according to the live wire testing circuit described in claim 3, it is characterised in that the emitter grounding of the 3rd pipe, the colelctor electrode of this first pipe connects power supply with the colelctor electrode of this second pipe.
5. according to the live wire testing circuit described in claim 4, it is characterised in that the colelctor electrode of the 3rd pipe connects power supply by current-limiting resistance.
6. an ammeter, including microprocessor and the alarm unit that is connected with this microprocessor, it is characterized in that, also include: live wire testing circuit that be connected with this microprocessor, as described in any one of claim 1 to 5, this detection signal can be judged by this microprocessor, and controls the offer wiring error warning of this alarm unit accordingly.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521098697.7U CN205427091U (en) | 2015-12-25 | 2015-12-25 | Ammeter and live wire detection circuitry |
| PCT/CN2016/097932 WO2017107556A1 (en) | 2015-12-25 | 2016-09-02 | Electricity meter and live wire detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521098697.7U CN205427091U (en) | 2015-12-25 | 2015-12-25 | Ammeter and live wire detection circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205427091U true CN205427091U (en) | 2016-08-03 |
Family
ID=56539064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521098697.7U Active CN205427091U (en) | 2015-12-25 | 2015-12-25 | Ammeter and live wire detection circuitry |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN205427091U (en) |
| WO (1) | WO2017107556A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107556A1 (en) * | 2015-12-25 | 2017-06-29 | 深圳长城开发科技股份有限公司 | Electricity meter and live wire detection circuit |
| CN115598566A (en) * | 2022-12-13 | 2023-01-13 | 麦田能源有限公司（Cn） | Method and device for checking electric meter wiring, processor and electronic equipment |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298277A (en) * | 2018-11-14 | 2019-02-01 | 长沙待电子科技有限公司 | Zero curve, firewire detection circuit and method, electrical equipment |
| CN111722101B (en) * | 2020-05-29 | 2023-09-01 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN114002468B (en) * | 2021-10-28 | 2024-05-17 | 国网山东省电力公司济南市历城区供电公司 | Low-voltage electricity larceny alarming method and system |
| CN114994572A (en) * | 2022-06-02 | 2022-09-02 | 合肥美的暖通设备有限公司 | Phase line zero line reverse connection detection method and device, storage medium and variable frequency air conditioner |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2058496U (en) * | 1989-07-31 | 1990-06-20 | 上海东海装潢材料厂 | Multifunctional safety device for electric measurement |
| CN2079299U (en) * | 1990-11-22 | 1991-06-19 | 胡晓明 | Multi-function micro electric field detector |
| JP2001128370A (en) * | 1999-10-28 | 2001-05-11 | Alps Electric Co Ltd | Protective circuit for reverse connection of power supply |
| CN201314939Y (en) * | 2008-09-28 | 2009-09-23 | 深圳创维－Rgb电子有限公司 | Route detection device |
| CN202134911U (en) * | 2011-07-22 | 2012-02-01 | 珠海格力电器股份有限公司 | Detection protection circuit for preventing reverse connection of power supply fire and zero lines |
| CN204882690U (en) * | 2015-08-13 | 2015-12-16 | 高超 | Non - touch voltage detection instrument |
| CN205427091U (en) * | 2015-12-25 | 2016-08-03 | 深圳长城开发科技股份有限公司 | Ammeter and live wire detection circuitry |
-
2015
- 2015-12-25 CN CN201521098697.7U patent/CN205427091U/en active Active
-
2016
- 2016-09-02 WO PCT/CN2016/097932 patent/WO2017107556A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107556A1 (en) * | 2015-12-25 | 2017-06-29 | 深圳长城开发科技股份有限公司 | Electricity meter and live wire detection circuit |
| CN115598566A (en) * | 2022-12-13 | 2023-01-13 | 麦田能源有限公司（Cn） | Method and device for checking electric meter wiring, processor and electronic equipment |
| CN115598566B (en) * | 2022-12-13 | 2023-05-09 | 麦田能源有限公司 | Ammeter wiring inspection method and device, processor and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017107556A1 (en) | 2017-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205427091U (en) | Ammeter and live wire detection circuitry | |
| US8207862B2 (en) | Under-voltage warning circuit | |
| WO2016081759A4 (en) | DETECTING GROUND ISOLATION FAULT IN ETHERNET PoDL SYSTEM | |
| US9270062B2 (en) | Electronic device and connector detection circuit thereof | |
| CN203519761U (en) | Anti-error-connection detecting circuit for zero line and live line of AC power | |
| US9424886B1 (en) | Hard disk device and temperature alarm circuit of hard disk device | |
| CN107769158A (en) | A kind of safe leakage protection circuit | |
| CN204142883U (en) | Electric leakage detection circuit and electric leakage detection tool | |
| CN204613315U (en) | Intelligence electrostatic prevention pick-up unit | |
| CN203164351U (en) | A pile and electric leakage detecting circuit | |
| CN206161762U (en) | Grounded inspection circuit | |
| US20050275412A1 (en) | Cable power indicator | |
| CN204129897U (en) | The warning circuit of real-time monitoring fire omen early warning | |
| CN105264662B (en) | The protection circuit of signal output stage | |
| CN206542184U (en) | Lightning protection warning circuit | |
| CN105720568B (en) | A kind of tape lifetime Autonomous test and the live Surge Protector being conveniently replaceable | |
| CN205003216U (en) | Cable impedance detection circuitry | |
| CN206074738U (en) | For the alarm device of electrostatic defending | |
| CN205264967U (en) | 86 type sockets on anticreep type of detectable terminal temperature | |
| CN205722775U (en) | A kind of current stabilization siren based on audion principle | |
| CN105067892B (en) | A kind of cable resistance detection circuit | |
| CN205232304U (en) | Telephone circuit warning circuit that opens a way | |
| CN205429190U (en) | Grounding wire | |
| US9906011B2 (en) | Electronic device and over-current protection circuit thereof | |
| WO2018133005A1 (en) | Can signal line earthing short-circuit test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |