CN114089073A - Leakage detection device and leakage detection method - Google Patents
Leakage detection device and leakage detection method Download PDFInfo
- Publication number
- CN114089073A CN114089073A CN202111388367.1A CN202111388367A CN114089073A CN 114089073 A CN114089073 A CN 114089073A CN 202111388367 A CN202111388367 A CN 202111388367A CN 114089073 A CN114089073 A CN 114089073A
- Authority
- CN
- China
- Prior art keywords
- detection module
- live wire
- current
- zero line
- magnetic field
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 163
- 230000007935 neutral effect Effects 0.000 claims description 30
- 238000002360 preparation method Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Images
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
Abstract
The invention provides a leakage detection device and a leakage detection method. The electric leakage detection device includes: the device comprises a live wire detection module, a zero line detection module and a signal processing module; the signal processing module is connected to the live wire detection module and the zero line detection module; the live wire detection module is used for detecting a magnetic field generated by live wire current; the zero line detection module is used for detecting a magnetic field generated by zero line current; the signal processing module is connected with the live wire detection module and the zero line detection module, and is used for receiving signals of the live wire detection module and the zero line detection module, calculating a difference value of the signals and judging a leakage condition. Above-mentioned technical scheme sets up as the module of direct detection electromagnetic variation through detecting live wire detection module and zero line detection module, has solved direct current and direct current component leakage detection's problem to whether accurate detection circuitry leaks electricity.
Description
Technical Field
The present invention relates to the field of current detection, and in particular, to an electric leakage detection device and an electric leakage detection method.
Background
Fig. 1 shows a conventional leakage detecting device in the prior art, in which a transformer 111 and a transformer 112 are respectively disposed on a live line and a neutral line, when an ac current flows through a primary side of the transformer 111 and/or the transformer 112, a magnetic field changes, so that a secondary side of the transformer 111 and/or the transformer 112 generates an induced current, and finally, an output signal of the two transformers is compared by a comparator 121 to determine whether a leakage phenomenon exists between the live line L and the neutral line N.
However, since the current transformer has a narrow high-precision operating frequency range, and is particularly incapable of transferring dc current, that is, when dc current constantly flows through the primary side, no induced current is generated on the secondary side, and the dc current component in the ac current cannot cause the change of the secondary side current, the dc component included in the primary side in the conventional leakage detection method cannot be reflected in the secondary side detection signal, and dc leakage cannot be detected.
Therefore, how to detect the dc current component and to accurately detect whether the circuit leaks current to achieve fully integrated leakage detection is a problem to be solved in the prior art.
Disclosure of Invention
The invention aims to provide an electric leakage detection device and an electric leakage detection method, which can accurately detect electric leakage.
In order to solve the above problem, the present invention provides an electric leakage detecting device including: the device comprises a live wire detection module, a zero line detection module and a signal processing module; the signal processing module is connected to the live wire detection module and the zero line detection module; the live wire detection module is used for detecting a magnetic field generated by live wire current; the zero line detection module is used for detecting a magnetic field generated by zero line current; the signal processing module is connected with the live wire detection module and the zero line detection module, and is used for receiving signals of the live wire detection module and the zero line detection module, calculating a difference value of the signals and judging a leakage condition.
In some embodiments, the hot wire detection module comprises a first hall sensor through which hot wire current flows around for detecting a magnetic field change of the hot wire current; the zero line detection module comprises a second Hall sensor, and zero line current flows around the second Hall sensor and is used for detecting the magnetic field change of the zero line current.
In some embodiments, the live wire detection module further comprises a live wire connection member for connecting a live wire to the live wire detection module.
In some embodiments, the neutral detection module further comprises a neutral connection member for connecting a neutral wire to the neutral detection module.
In some embodiments, the distance between the second hall sensor and the neutral line is set to be the same as the distance between the first hall sensor and the live line.
In some embodiments, the electrical leakage detection apparatus further comprises a signal output module; the signal processing module is provided with a plurality of channels which are respectively connected to a plurality of pins of the signal output module.
The invention also provides a leakage detection method, which comprises the following steps: acquiring a magnetic field signal of a live wire through a live wire detection module, and converting the magnetic field signal into a current signal; acquiring a magnetic field signal of a zero line through a zero line detection module and converting the magnetic field signal into a current signal; and receiving the current signals of the live wire detection module and the zero line detection module through a signal processing module, calculating the difference value of the current signals, and outputting a difference value signal for judging the electric leakage condition.
In some embodiments, the hot detection module includes a first hall sensor through which hot current flows around; the live wire detection module directly detects the magnetic field change caused by the live wire current change through the first Hall sensor and converts the magnetic field change into a current signal; the zero line detection module comprises a second Hall sensor, and zero line current flows around the second Hall sensor; and the zero line detection module directly detects the magnetic field change caused by the zero line current change through the second Hall sensor and converts the magnetic field change into a current signal.
In some embodiments, the distance between the second hall sensor and the neutral line is set to be the same as the distance between the first hall sensor and the live line.
In some embodiments, the leakage detection method further comprises: and when the difference signal is not zero, judging the electric leakage.
Above-mentioned technical scheme is through setting up live wire detection module and zero line detection module into the module of direct detection electromagnetic variation, not only can detect the difference of live wire and zero line on alternating current component, and the difference of direct current component also can be detected out simultaneously, has solved among the prior art and can only measure the current variation in the alternating electric field through the mutual-inductor, is difficult to solve direct current and direct current component leakage detection's problem to whether accurate detection circuitry leaks electricity. And above-mentioned technical scheme has got rid of the mutual-inductor, can also set up live wire and zero line connecting piece into insulating material for detection device's volume reduces and current insulation, application that can be better is in the current detection field.
Drawings
Fig. 1 is a schematic structural diagram of a leakage detecting device in the prior art.
Fig. 2 is a schematic structural diagram of a leakage detecting device according to an embodiment of the present invention.
Fig. 3 is a flowchart of a leakage detection method according to an embodiment of the present invention.
Detailed Description
The following describes in detail a specific embodiment of an electrical leakage detection apparatus according to the present invention with reference to the accompanying drawings.
Fig. 2 is a schematic diagram of an electrical leakage detection apparatus according to an embodiment of the present invention. Referring to fig. 2, the leakage detecting device includes: a live wire detection module 211, a neutral wire detection module 212, and a signal processing module 231; the signal processing module 231 is connected to the live wire detection module 211 and the neutral wire detection module 212. When the live wire is connected to the live wire detection module 211, a corresponding magnetic field is generated in the live wire by both alternating current and direct current, and at this time, the live wire detection module 211 detects the magnetic field intensity generated by the live wire current, converts the magnetic field intensity into a current signal, and transmits the current signal to the signal processing module; similarly, when the zero line is connected to the zero line detection module 212, a corresponding magnetic field is generated in the zero line through alternating current or direct current, and the zero line detection module 212 is configured to detect a magnetic field intensity generated by the zero line current and convert the magnetic field intensity into a current signal, and transmit the current signal to the signal processing module. By directly detecting the magnetic field intensity generated by the current of the live wire and the zero wire, the corresponding current values of the live wire and the zero wire can be detected without continuous magnetic field change. The signal processing module 231 is connected to the live wire detection module 211 and the zero line detection module 212, and is configured to receive current signals of the live wire detection module 211 and the zero line detection module 212, calculate a difference between generated current signals of the live wire detection module 211 and the zero line detection module 212, and determine a leakage condition, where current values of the live wire and the zero line may be output respectively. In some embodiments, the signal processing module 231 receives the current signals of the live wire detection module and the zero wire detection module, performs AD/DA conversion on the current signals, calculates a difference value, and outputs the difference value signal for determining the leakage condition.
In some embodiments, the hot wire detection module 211 comprises a first hall sensor 221, a hot wire current flows around the first hall sensor 221 to generate a magnetic field, and the first hall sensor 221 detects a magnetic field change of the hot wire current by directly detecting a magnetic field intensity generated by the hot wire current; the zero line detection module 212 includes a second hall sensor 222, and similarly, the zero line current flows around the second hall sensor 222 to generate a magnetic field, and the second hall sensor 222 detects the magnetic field change of the zero line current by directly detecting the magnetic field intensity generated by the zero line current.
In some embodiments, the live wire detection module further comprises a live wire connection component 251 for connecting the live wire to the live wire detection module. The neutral detection module further includes a neutral connection 252 for connecting a neutral wire to the neutral detection module.
In some embodiments, the distance between the second hall sensor 222 and the neutral line is set to be the same as the distance between the first hall sensor 221 and the live line, and then the back end does not need to calculate the influence of the distance on the magnetic field density generated by the current of the neutral line or the live line.
In some embodiments, the electrical leakage detection apparatus further comprises a signal output module 241; the signal processing module 231 is provided with a plurality of channels, which are respectively connected to a plurality of pins of the signal output module 241 and can respectively output the current values of the live wire and the neutral wire.
Above-mentioned technical scheme is through setting up live wire detection module 211 and zero line detection module 212 into the module of direct detection magnetic field intensity, when live wire alternating current component and zero line alternating current component inconsistent, the magnetic field intensity that distributes around live wire and the zero line is different, and when live wire direct current component and zero line direct current component inconsistent, the magnetic field intensity that distributes around live wire and the zero line is also different. Therefore, the technical scheme can detect the difference of the current of the live wire and the current of the zero line on the alternating current component, and the difference of the current of the live wire and the current of the zero line on the direct current component can be detected, so that the problems that in the prior art, the current change can only be measured in an alternating electric field through a mutual inductor, and the direct current component leakage detection in the direct current and the alternating current is difficult to solve are solved, and whether the accurate detection circuit leaks electricity to realize the fully-integrated leakage detection or not. And above-mentioned technical scheme has got rid of the mutual-inductor, can also adopt insulating material with live wire and zero line adapting unit for detection device's volume reduces and current insulation, and the multichannel design can output each way electric current, and application that can be better is in the current detection field.
Fig. 3 is a flowchart of a leakage detection method according to an embodiment of the present invention. Referring to fig. 3, the leakage detecting method includes: step S1, acquiring a magnetic field signal of the live wire through the live wire detection module, and converting the magnetic field signal into a current signal; step S2, acquiring a magnetic field signal of the zero line through a zero line detection module, and converting the magnetic field signal into a current signal; and step S3, receiving the current signals of the live wire detection module and the zero wire detection module through a signal processing module, calculating the difference value of the current signals, and outputting a difference value signal for judging the electric leakage condition. In some embodiments, the signal processing module receives the current signals of the live wire detection module and the zero wire detection module, performs AD/DA conversion on the current signals, calculates a difference value of the current signals, and outputs a difference value signal for determining a leakage condition.
Referring to fig. 2, the signal processing module 231 is connected to the live line detection module 211 and the neutral line detection module 212. When the live wire is connected to the live wire detection module 211, a corresponding magnetic field is generated in the live wire by both alternating current and direct current, and at this time, the live wire detection module 211 detects the magnetic field intensity generated by the live wire current, converts the magnetic field intensity into a current signal, and transmits the current signal to the signal processing module; similarly, when the zero line is connected to the zero line detection module 212, a corresponding magnetic field is generated in the zero line through alternating current or direct current, and the zero line detection module 212 is configured to detect a magnetic field intensity generated by the zero line current and convert the magnetic field intensity into a current signal, and transmit the current signal to the signal processing module. Based on the magnetic field intensity generated by directly detecting the current of the live wire and the zero line, the corresponding current values of the live wire and the zero line can be detected without continuous magnetic field change. The signal processing module 231 is connected to the live wire detection module 211 and the zero line detection module 212, and is configured to receive current signals of the live wire detection module 211 and the zero line detection module 212, calculate a difference between generated current signals of the live wire detection module 211 and the zero line detection module 212, and determine a leakage condition, where current values of the live wire and the zero line may be output respectively.
In some embodiments, the hot detection module 211 includes a first hall sensor 221 and a second hall sensor 222. Hot wire current flows around the first hall sensor 221; the live wire detection module directly detects the magnetic field change caused by the live wire current change through the first hall sensor, that is, the first hall sensor 221 detects the live wire current through the magnetic field strength directly detected by the live wire current, and converts the magnetic field signal generated by the live wire current into a current signal. Zero line current flows around the second hall sensor 222; the zero line detection module 212 directly detects the magnetic field change caused by the change of the zero line current through the second hall sensor 222, that is, the second hall sensor 222 detects the zero line current by directly detecting the magnetic field strength generated by the zero line current, and converts the magnetic field signal generated by the zero line current into a current signal.
In some embodiments, the distance between the second hall sensor 222 and the neutral line is set to be the same as the distance between the first hall sensor 221 and the live line, and then the back end does not need to calculate the influence of the distance on the magnetic field density generated by the current of the neutral line or the live line.
In some embodiments, the electrical leakage detection apparatus further comprises a signal output module 241; the signal processing module 231 is provided with a plurality of channels, which are respectively connected to a plurality of pins of the signal output module 241 and can respectively output the current values of the live wire and the neutral wire.
In some embodiments, the leakage detection method further comprises: and when the difference signal is not zero, judging the electric leakage.
In some embodiments, the live wire detection module further comprises a live wire connection member 251 for connecting live wire to the live wire detection module. The neutral detection module further includes a neutral connection 252 for connecting a neutral wire to the neutral detection module.
In the above technical solution, through step S1, the live wire detection module 211 is used to obtain a magnetic field signal of a live wire and convert the magnetic field signal of the live wire into a current signal; step S2, acquiring a magnetic field signal of the zero line by using the zero line detection module 212, and converting the magnetic field signal of the zero line into a current signal; step S3, receiving the current signals of the live wire detection module and the zero wire detection module through the signal processing module 231, calculating a difference value therebetween, outputting a difference signal, and determining that electric leakage occurs when the difference signal is not zero. When the alternating current component of the live wire current is inconsistent with the alternating current component of the zero line current, the magnetic field intensity distributed around the live wire and the zero line is different, and when the direct current component of the live wire current is inconsistent with the direct current component of the zero line current, the magnetic field intensity distributed around the live wire and the zero line is also different. Therefore, the technical scheme can detect the difference of the live wire current and the zero wire current on the alternating current component, and the difference of the live wire current and the zero wire current on the direct current component can be detected, so that the problem that in the prior art, the current change can only be measured in an alternating electric field through a mutual inductor, the direct current and direct current component leakage detection is difficult to solve is solved, and whether the circuit leaks electricity or not is accurately detected. And above-mentioned technical scheme has got rid of the mutual-inductor, can also adopt insulating material with live wire and zero line adapting unit for detection device's volume reduces and current insulation, and the multichannel design can output each way electric current, and application that can be better is in the current detection field.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An electrical leakage detection device comprising: the device comprises a live wire detection module, a zero line detection module and a signal processing module;
the signal processing module is connected to the live wire detection module and the zero line detection module;
it is characterized in that the preparation method is characterized in that,
the live wire detection module is used for detecting a magnetic field generated by live wire current;
the zero line detection module is used for detecting a magnetic field generated by zero line current;
the signal processing module is connected with the live wire detection module and the zero line detection module, and is used for receiving signals of the live wire detection module and the zero line detection module, calculating a difference value of the signals and judging a leakage condition.
2. An electric leakage detection apparatus according to claim 1,
the live wire detection module comprises a first Hall sensor, and live wire current flows around the first Hall sensor and is used for detecting the magnetic field change of the live wire current;
the zero line detection module comprises a second Hall sensor, and zero line current flows around the second Hall sensor and is used for detecting the magnetic field change of the zero line current.
3. A residual current device according to claim 2, characterized by comprising live connection means for connecting live to said live detection module.
4. The electrical leakage detection apparatus of claim 2, comprising a neutral connection member for connecting a neutral to said neutral detection module.
5. A leakage detecting device according to claim 2, wherein the distance between the second hall sensor and the neutral line is set to be the same as the distance between the first hall sensor and the live line.
6. The electrical leakage detection device according to claim 1, comprising a signal output module; the signal processing module is provided with a plurality of channels which are respectively connected to a plurality of pins of the signal output module.
7. An electrical leakage detection method, comprising:
acquiring a magnetic field signal of a live wire through a live wire detection module, and converting the magnetic field signal into a current signal;
acquiring a magnetic field signal of a zero line through a zero line detection module and converting the magnetic field signal into a current signal;
and receiving the current signals of the live wire detection module and the zero line detection module through a signal processing module, calculating the difference value of the current signals, and outputting a difference value signal for judging the electric leakage condition.
8. An electric leakage detection method according to claim 7,
the live wire detection module comprises a first Hall sensor, and live wire current flows around the first Hall sensor;
the live wire detection module directly detects the magnetic field change caused by the live wire current change through the first Hall sensor and converts the magnetic field change into a current signal;
the zero line detection module comprises a second Hall sensor, and zero line current flows around the second Hall sensor;
and the zero line detection module directly detects the magnetic field change caused by the zero line current change through the second Hall sensor and converts the magnetic field change into a current signal.
9. The electrical leakage detection method according to claim 8, wherein a distance between the second hall sensor and the neutral line is set to be the same as a distance between the first hall sensor and the live line.
10. The electrical leakage detection method according to claim 7, further comprising: and when the difference signal is not zero, judging that the electric leakage exists.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111388367.1A CN114089073A (en) | 2021-11-22 | 2021-11-22 | Leakage detection device and leakage detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111388367.1A CN114089073A (en) | 2021-11-22 | 2021-11-22 | Leakage detection device and leakage detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114089073A true CN114089073A (en) | 2022-02-25 |
Family
ID=80302869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111388367.1A Pending CN114089073A (en) | 2021-11-22 | 2021-11-22 | Leakage detection device and leakage detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114089073A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011203409A (en) * | 2010-03-25 | 2011-10-13 | Kyocera Mita Corp | Power source circuit and image forming apparatus |
| CN102361317A (en) * | 2011-08-17 | 2012-02-22 | 佛山市中格威电子有限公司 | Leakage protection test circuit |
| CN103280980A (en) * | 2013-04-23 | 2013-09-04 | 浙江大学 | Digital power supply device for leakage protector detection system |
| CN103487699A (en) * | 2013-09-25 | 2014-01-01 | 浙江大学 | Digital detecting system for leakage protector and high-precision detecting method |
| CN210142173U (en) * | 2019-04-25 | 2020-03-13 | 厦门电力成套设备有限公司 | Electric meter |
| CN213275885U (en) * | 2020-10-27 | 2021-05-25 | 南京昊福淇电气设备有限公司 | Circuit breaker electric leakage detection device |
-
2021
- 2021-11-22 CN CN202111388367.1A patent/CN114089073A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011203409A (en) * | 2010-03-25 | 2011-10-13 | Kyocera Mita Corp | Power source circuit and image forming apparatus |
| CN102361317A (en) * | 2011-08-17 | 2012-02-22 | 佛山市中格威电子有限公司 | Leakage protection test circuit |
| CN103280980A (en) * | 2013-04-23 | 2013-09-04 | 浙江大学 | Digital power supply device for leakage protector detection system |
| CN103487699A (en) * | 2013-09-25 | 2014-01-01 | 浙江大学 | Digital detecting system for leakage protector and high-precision detecting method |
| CN210142173U (en) * | 2019-04-25 | 2020-03-13 | 厦门电力成套设备有限公司 | Electric meter |
| CN213275885U (en) * | 2020-10-27 | 2021-05-25 | 南京昊福淇电气设备有限公司 | Circuit breaker electric leakage detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101300789B1 (en) | Instrument and method to obtain ratio error of current transformer for watt-hour-meter | |
| EP2693235B1 (en) | Detector with a coil for detecting a conductor or another circuit with another coil | |
| CN101622777B (en) | Load current detection in electrical power converters | |
| CN210071931U (en) | Automatic detection device for B-type residual current size and type | |
| TWI499791B (en) | A compensating apparatus for a non-contact current sensor installing variation in two wire power cable | |
| WO2012075887A1 (en) | Current measuring device and current measuring method | |
| CN103630797A (en) | Interturn short circuit detecting device of transformer | |
| US6707287B2 (en) | Electrical quantity sensor | |
| CN111198297A (en) | Signal acquisition device based on Rogowski coil and zero-flux current sensor | |
| US20170102417A1 (en) | Device and method for measuring the power consumption, contactless device and method for measuring power supply status | |
| JP2016099344A (en) | Ground resistance measurement device and operation method thereof | |
| CN108827500B (en) | High-elasticity piezomagnetic body based on piezomagnetic effect and high-elasticity force cell | |
| JP2010256141A (en) | Current detection apparatus and watt-hour meter using the same | |
| CN114089073A (en) | Leakage detection device and leakage detection method | |
| Zhang et al. | Design and test of a new high-current electronic current transformer with a Rogowski coil | |
| CN110618346B (en) | Household meter identification method and household meter identification device | |
| CN106841808B (en) | The auxiliary winding measurement method of intermediate-frequency transformer winding AC resistance | |
| CN104880686A (en) | Device and method for checking portable electronic current transformer | |
| CN105954702B (en) | The phase error detection system and method for electronic transducer calibration instrument | |
| CN204719222U (en) | A kind of portable electronic piece formula current transformer calibration device | |
| TWI418828B (en) | Transformer test system | |
| CN110261668A (en) | Current detection circuit and detection method | |
| CN212568917U (en) | Electronic current sensor for electric energy meter | |
| CN107356895A (en) | High-tension current inductor error measuring system | |
| JP2011089883A (en) | Current detection apparatus and watt-hour meter using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220523 Address after: 201203 Shanghai Pudong New Area free trade trial area, 1 spring 3, 400 Fang Chun road. Applicant after: Shanghai Xinggan Semiconductor Co.,Ltd. Address before: Room 174030, No.1, Huishan Economic Development Zone, Wuxi, Jiangsu Province Applicant before: Jiangsu Xingzhou Microelectronics Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220609 Address after: Room 174030, No.1, Huishan Economic Development Zone, Wuxi, Jiangsu Province Applicant after: Jiangsu Xingzhou Microelectronics Co.,Ltd. Address before: 201203 Shanghai Pudong New Area free trade trial area, 1 spring 3, 400 Fang Chun road. Applicant before: Shanghai Xinggan Semiconductor Co.,Ltd. |