CN221303536U - Detection circuit for detecting electric leakage condition of metal article - Google Patents
Detection circuit for detecting electric leakage condition of metal article Download PDFInfo
- Publication number
- CN221303536U CN221303536U CN202322208216.4U CN202322208216U CN221303536U CN 221303536 U CN221303536 U CN 221303536U CN 202322208216 U CN202322208216 U CN 202322208216U CN 221303536 U CN221303536 U CN 221303536U
- Authority
- CN
- China
- Prior art keywords
- resistor
- module
- leakage
- detection
- capacitor
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 105
- 239000002184 metal Substances 0.000 title claims abstract description 12
- 230000003321 amplification Effects 0.000 claims abstract description 16
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 33
- 101100190527 Arabidopsis thaliana PIN5 gene Proteins 0.000 claims description 11
- 101100190528 Arabidopsis thaliana PIN6 gene Proteins 0.000 claims description 9
- 101100190529 Arabidopsis thaliana PIN7 gene Proteins 0.000 claims description 8
- 101100190530 Arabidopsis thaliana PIN8 gene Proteins 0.000 claims description 8
- 108010059419 NIMA-Interacting Peptidylprolyl Isomerase Proteins 0.000 claims description 6
- 102100026114 Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 Human genes 0.000 claims description 6
- 101150087393 PIN3 gene Proteins 0.000 claims description 3
- 101150011456 PIN8 gene Proteins 0.000 claims description 3
- 108010037490 Peptidyl-Prolyl Cis-Trans Isomerase NIMA-Interacting 4 Proteins 0.000 claims description 3
- 102100031653 Peptidyl-prolyl cis-trans isomerase NIMA-interacting 4 Human genes 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a detection circuit for detecting the leakage condition of a metal object, which comprises a detection circuit, wherein the detection circuit is provided with a leakage detection module, a voltage reference module and a comparison amplification module, the voltage detection module on the detection circuit is responsible for detecting whether an object has the condition of earth leakage, the voltage reference module is responsible for providing 2.5V reference voltage, the comparison amplification module is responsible for comparing and amplifying a voltage signal of the detection object so as to facilitate MCU detection, the leakage detection module is responsible for measuring the leakage condition among a phase line L end, a zero line N end and a signal ground, and a hundred-megameter-level current limiting resistor is preset.
Description
Technical Field
The utility model relates to the technical field of strong current protection and detection, in particular to a detection circuit for detecting the leakage condition of a metal object.
Background
In the field of strong electricity, the safety of electricity consumption is always a more important problem, and equipment leakage refers to the situation that insulation of a power line or electric equipment is damaged, quality is unqualified, artificial damage is caused, and the like, current flows from an abnormal circuit to the ground, usually in milliamp level, if the leakage current is too large, personal injury can be caused, even fire can be caused, so that periodic detection and elimination of equipment leakage are very necessary
In general, methods for detecting the leakage of equipment include a leakage detection instrument, a method for detecting a ground resistance, a method for detecting an insulation condition of equipment, and the like, but all the methods need to be manually operated, and besides the leakage detection instrument, other methods can only detect whether the leakage exists or not and cannot quantitatively analyze the leakage condition, so that an improved technology is needed to solve the problem existing in the prior art.
Disclosure of utility model
The utility model aims to provide a detection circuit which can automatically, real-time and quantitatively detect the leakage condition of equipment, is an extremely practical leakage detection circuit, is matched with various long-distance communication in the detection circuit, and can realize the detection of the leakage condition of metal articles with the functions of real-time detection and automatic alarm of the leakage condition of the equipment so as to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the detection circuit for detecting the leakage condition of the metal object comprises a detection circuit, wherein the detection circuit is provided with a leakage detection module, a voltage reference module and a comparison amplification module;
One side of the electric leakage detection module on the detection circuit is provided with a phase line L end and a zero line N end, the other side of the electric leakage detection module is provided with an electric leakage detection module, the electric leakage detection module and the electric leakage detection module are connected by adopting a lead, and one side of the electric leakage detection module is provided with an AD_TO_CPU port and a grounding port in a matching way;
And a voltage reference module is arranged between the phase line L end, the zero line N end and the comparison amplifying module on the electric leakage detection module, and a grounding wire is arranged between the voltage reference module and the comparison amplifying module.
Preferably, the leakage detection module includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a resistor RL
Wherein: the 1 end of the resistor R5 is grounded, 3 branches are arranged at the other end, one of the branches is connected in series to the live wire L through the resistor R2, the other branch is connected in series to the zero line N through the resistor R4 and the resistor R3, the other branch is connected in series to the live wire L through the resistor RL, one section of the resistor R6 is connected with the centers of the resistor R1 and the resistor R2, the other end is connected with the PIN5 of the U1, one end of the resistor R7 is connected with the centers of the resistor R3 and the resistor R4, and the other end is connected with the PIN6 of the U1.
Preferably, the voltage reference module includes one of resistor R11, resistor R12, resistor R8, capacitor C1, capacitor C2, capacitor C3, and comparator U1;
The resistor R11 and the resistor R12 form a voltage dividing circuit, and other circuits of the circuit form a voltage follower;
The resistor R11 and the resistor R12 are connected in series between 5V and GND, the voltage division circuit of the resistor R12 is connected with PIN3 of the comparator U1, the resistor R11 is an upper resistor, the resistor R12 is a lower resistor, the capacitor C1 and the lower resistor R12 are connected in parallel, the resistor R8 and the capacitor C3 are connected in parallel and are connected in series between PIN1 and PIN5 of the comparator U1, the capacitor C2 is connected in parallel between PIN1 and GND, a power PIN PIN8 of the comparator U1 is connected with 5V, and a ground PIN4 of the comparator U1 is connected with GND.
Preferably, the comparison amplifying module comprises a comparator U1, a capacitor C8, a capacitor C4, a resistor R9, a resistor R10 and a diode D1.
Wherein: the capacitor C8 and the resistor R9 are connected in parallel and then connected in parallel with the PIN6 and the PIN7 of the comparator U1, the resistor R10 is connected with the PIN7 of the comparator U1 and the MCU detection PIN (AD_TO_CPU), the capacitor C4 is connected in parallel between the MCU detection PIN (AD_TO_CPU) and GND, the diode D1 is connected in parallel between VCC and the MCU detection PIN (AD_TO_CPU), and the anode is connected with VCC.
Preferably, the detection circuit provides a special leakage detection line to be connected to the equipment to be detected, the equipment to be detected cannot be in a suspended state, the leakage detection module is connected with the signal end of the MCU, and hundred-megalevel current limiting resistors are preset among the high-voltage input phase line L end, the zero line N end and the signal ground GND in the detection circuit.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The electric leakage detection module is responsible for measuring the electric leakage condition between the live wire L, the zero line N and the signal ground GND/electric leakage detection equipment, providing a basic signal to the comparison amplification module, and providing a reference voltage of 2.5V by the voltage reference module, so that the whole waveform of the comparison amplification module is lifted upwards by 2.5V, the comparison amplification module carries out subtraction after the signal level of the electric leakage detection module is lifted by 2.5V reference, and the signal which can be detected by the MCU is finally obtained after amplification treatment;
(2) The detection circuit can automatically, real-time and quantitatively detect the leakage condition of the equipment, is an extremely practical leakage detection circuit, is matched with various long-distance communication in the detection circuit, and can realize the functions of real-time detection and automatic alarm of the leakage condition of the equipment.
Drawings
FIG. 1 is a schematic diagram of a detection system according to the present utility model;
fig. 2 is a schematic diagram of the overall circuit system structure of the present utility model.
In the figure: 1. a detection circuit; 2. the electric leakage detection module; 3. a voltage reference module; 4. and the comparison and amplification module.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, the present utility model provides a technical solution: the utility model provides a detect detection circuitry of metal article electric leakage situation, includes detection circuitry 1, is equipped with electric leakage detection module 2 on the detection circuitry 1, voltage reference module 3, comparison amplification module 4, one side of electric leakage detection module 2 is equipped with phase line L end, zero line N end on the detection circuitry 1, and the opposite side of electric leakage detection module is equipped with electric leakage detection module, adopt the wire TO connect between electric leakage detection module and the electric leakage detection module, one side cooperation of electric leakage detection module is equipped with AD_TO_CPU port and ground connection port, be equipped with voltage reference module between phase line L end, zero line N end on the electric leakage detection module and the comparison amplification module, be equipped with the earth connection between voltage reference module and the comparison amplification module.
The leakage detection module 2 comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor RL, wherein the 1 end of the resistor R5 is grounded, the other end of the resistor R5 is provided with 3 branches, one branch is connected with a live wire L in series, the other branch is connected with a zero line N in series through the resistor R4 and the R3, the other branch is connected with the L (live wire) in series through the RL, one section of the resistor R6 is connected with the centers of the resistor R1 and the resistor R2, the other end of the resistor R6 is connected with the PIN5 of the U1, one end of the resistor R7 is connected with the centers of the resistor R3 and the resistor R4, and the other end of the resistor R7 is connected with the PIN6 of the comparator U1.
The voltage reference module 3 comprises a resistor R11, a resistor R12, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3 and a comparator U1, wherein the resistor R11 and the resistor R12 form a voltage dividing circuit, other circuits of the circuit form a voltage follower, the resistor R11 and the resistor R12 are connected in series between 5V and GND, the voltage dividing circuit is connected with a PIN3 of the comparator U1, the resistor R11 is an upper resistor, the resistor R12 is a lower resistor, the capacitor C1 and the lower resistor R12 are connected in parallel, the resistor R8 and the capacitor C3 are connected in parallel and are connected in series between PIN1 and PIN5 of the U1, and the capacitor C2 is connected in parallel between PIN1 and GND; the power PIN PIN8 of U1 is connected with 5V, and the foot PIN4 of U1 is connected with GND.
The comparison amplifying module 4 comprises a comparator U1, a capacitor C8, a capacitor C4, a resistor R9, a resistor R10 and a diode D1, wherein the capacitor C8 and the resistor R9 are connected in parallel and then connected in parallel with a PIN6 and a PIN7 of the comparator U1, the resistor R10 is connected with the PIN7 of the comparator U1 and an MCU detection PIN (AD_TO_CPU), the capacitor C4 is connected in parallel between the MCU detection PIN (AD_TO_CPU) and GND, the diode D1 is connected in parallel between VCC and the MCU detection PIN (AD_TO_CPU), and the anode is connected with VCC.
The detection circuit 1 provides a special leakage detection line to be connected to the equipment to be detected, the equipment to be detected cannot be in a suspended state, otherwise no leakage condition occurs, and the leakage detection module is connected with the signal end of the MCU, so that the whole set of circuit is a non-isolation circuit, and hundred-megalevel current limiting resistors are preset between the high-voltage input phase line L end, the zero line N end and the signal ground GND in the detection circuit.
The electric leakage detection module is responsible for measuring the electric leakage condition between the live wire L, the zero line N and the signal ground GND/electric leakage detection equipment, provides a basic signal to the comparison amplification module 4, and the voltage reference module 3 provides a reference voltage of 2.5V, so that the whole waveform of the comparison amplification module 4 is lifted upwards by 2.5V, the comparison amplification module 4 performs subtraction after the signal level of the electric leakage detection module 2 is lifted by 2.5V reference, and the signal which can be detected by the MCU is finally obtained after amplification processing.
Examples:
The comparison amplifying module comprises a comparator U1, a capacitor C8, a capacitor C4, a resistor R9, a resistor R10 and a diode D1.
Wherein C8 and R9 are connected in parallel and then connected in parallel with PIN6 and PIN7 of U1, a resistor R10 is connected with PIN7 and MCU detection PIN (AD_TO_CPU) of comparator U1, a capacitor C4 is connected in parallel between MCU detection PIN (AD_TO_CPU) and GND, comparator D1 is connected in parallel between VCC and MCU detection PIN (AD_TO_CPU), and the positive electrode is connected with VCC.
By adopting the technical scheme, when the impedance of the phase line L end and the zero line N TO the GND is the same, the level signals sent TO the in-phase end (PIN 5) and the reverse end (PIN 6) of the U1 are the same in size and the phase is the same, the output of the comparator U1 is 0, when the leakage occurs TO the GND by the phase line L end and the zero line N, the impedance is different, the level signals sent TO the in-phase end (PIN 5) and the reverse end (PIN 6) of the comparator U1 are different in size and the phase is the same, a difference value exists between the two signals, and the difference value is fed back TO the MCU detection PIN (AD_TO_CPU) through the comparator U1, so that the system can detect the occurrence of the leakage.
The working mode of the circuit is as follows:
In the normal state: the impedance of the phase line L end and the zero line N relative to the detection point is the same, and the level signals of the in-phase end PIN5 and the reverse end PIN6 of the comparator U1 are the same.
In the leakage state, the impedance of the phase line L end and the zero line N relative to the detection point is the same, at this time, the level signals of the in-phase end PIN5 and the reverse end PIN6 of the comparator U1 are different in magnitude and the phases are the same, and it is assumed that the phase line L end and the GND are in the leakage state and a set value is given to them.
The upper graph is a result of setting the RL in the schematic diagram to simulate the resistance and the L leakage to 100M, and the smaller the resistance RL, the more serious the leakage current, the larger the difference between 2, and if N leakage, the red becomes unchanged and the blue becomes smaller.
The detection circuit can automatically, real-time and quantitatively detect the leakage condition of the equipment, is an extremely practical leakage detection circuit, is matched with various long-distance communication in the detection circuit, and can realize the functions of real-time detection and automatic alarm of the leakage condition of the equipment.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a detect detection circuitry of metal object electric leakage situation, includes detection circuitry (1), its characterized in that: the detection circuit (1) is provided with a leakage detection module (2), a voltage reference module (3) and a comparison amplification module (4);
One side of a leakage detection module (2) on the detection circuit (1) is provided with a phase line L end and a zero line N end, the other side of the leakage detection module is provided with a leakage detection module, the leakage detection module and the leakage detection module are connected by adopting a wire, and one side of the leakage detection module is provided with an AD_TO_CPU port and a grounding port in a matching way;
And a voltage reference module is arranged between the phase line L end, the zero line N end and the comparison amplifying module on the electric leakage detection module, and a grounding wire is arranged between the voltage reference module and the comparison amplifying module.
2. The detection circuit for detecting a leakage condition of a metal object according to claim 1, wherein: the leakage detection module (2) comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a resistor RL,
Wherein: the 1 end of the resistor R5 is grounded, the other end is provided with 3 branches, one of the branches is connected in series with the live wire L through the resistor R2, the other branch is connected in series with the live wire L through the resistor R4, the other branch is connected in series with the zero line N through the resistor R3, the other branch is connected in series with the L through the resistor RL, one section of the resistor R6 is connected with the centers of the resistor R1 and the resistor R2, the other end is connected with the PIN5 of the U1, one end of the resistor R7 is connected with the centers of the resistor R3 and the resistor R4, and the other end is connected with the PIN6 of the comparator U1.
3. The detection circuit for detecting a leakage condition of a metal object according to claim 1, wherein: the voltage reference module (3) comprises one group of a resistor R11, a resistor R12, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3 and a comparator U1;
the resistor R11 and the resistor R12 form a voltage dividing circuit;
The resistor R11 and the resistor R12 are connected in series between 5V and GND, the voltage division is electrically connected with the PIN3 of the comparator U1, the resistor R11 is an upper resistor, the resistor R12 is a lower resistor, the capacitor C1 and the lower resistor R12 are connected in parallel, the resistor R8 and the capacitor C3 are connected in parallel and are also connected in series between the PIN1 and the PIN5 of the U1, and the capacitor C2 is connected in parallel between the PIN1 and the GND; the power PIN PIN8 of U1 is connected with 5V, and the foot PIN4 of U1 is connected with GND.
4. The detection circuit for detecting a leakage condition of a metal object according to claim 1, wherein: the comparison amplifying module (4) comprises a comparator U1, a capacitor C8, a capacitor C4, a resistor R9, a resistor R10 and a diode D1;
Wherein: the capacitor C8 and the resistor R9 are connected in parallel and then connected in parallel with the PIN6 and the PIN7 of the comparator U1, the resistor R10 is connected with the PIN7 of the comparator U1 and the MCU detection PIN (AD_TO_CPU), the capacitor C4 is connected in parallel between the MCU detection PIN (AD_TO_CPU) and GND, the diode D1 is connected in parallel between VCC and the MCU detection PIN (AD_TO_CPU), and the anode is connected with VCC.
5. The detection circuit for detecting a leakage condition of a metal object according to claim 1, wherein: the detection circuit (1) provides a special leakage detection line to be connected to equipment to be detected, the equipment to be detected cannot be in a suspended state, the leakage detection module is connected with a signal end of the MCU, and hundred-megalevel current limiting resistors are preset among a high-voltage input phase line L end, a zero line N end and a signal ground GND in the detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322208216.4U CN221303536U (en) | 2023-08-16 | 2023-08-16 | Detection circuit for detecting electric leakage condition of metal article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322208216.4U CN221303536U (en) | 2023-08-16 | 2023-08-16 | Detection circuit for detecting electric leakage condition of metal article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221303536U true CN221303536U (en) | 2024-07-09 |
Family
ID=91750825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322208216.4U Active CN221303536U (en) | 2023-08-16 | 2023-08-16 | Detection circuit for detecting electric leakage condition of metal article |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221303536U (en) |
-
2023
- 2023-08-16 CN CN202322208216.4U patent/CN221303536U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206583996U (en) | Ground detection device and pond system | |
| CN101178426A (en) | Short circuit testing apparatus and method | |
| CN202770942U (en) | Electric-fire monitoring detector, and failure detecting circuit for residual current sensor of same | |
| CN201490710U (en) | Intelligent monitoring type surge protector | |
| CN106443371A (en) | Novel cable insulation online detection apparatus | |
| CN107271789A (en) | A kind of digital grounding resistance tester | |
| CN221303536U (en) | Detection circuit for detecting electric leakage condition of metal article | |
| CN106771639B (en) | High pressure pole tower ground resistance on-line monitoring system | |
| CN205679713U (en) | Switch cubicle arc light state monitoring apparatus | |
| CN108649893A (en) | A kind of detection of photovoltaic system earth fault resistance value and localization method | |
| CN102590719A (en) | Surface mounted device (SMD) sensor device for detecting local discharge of power cable terminal head | |
| CN205193164U (en) | Uninterrupted power source with lack zero line detection circuitry | |
| CN206235664U (en) | Three-phase and four-line intelligent electric meter and its fall zero line detection circuit | |
| CN103257303A (en) | Neutral line disconnection detection method based on third-harmonic currents | |
| CN201126457Y (en) | Electric leakage detection apparatus | |
| CN206962444U (en) | One kind input over under-voltage protection circuit | |
| CN208753985U (en) | Intelligent lightning protection device and the lightning protection box for protecting three-phase circuit | |
| CN205176140U (en) | Be applied to insulation resistance detector of IT system | |
| CN201130216Y (en) | Apparatus for automatically detecting voltage essential resistance | |
| CN115327426A (en) | Direct-current power supply ground fault on-line detection method and system | |
| CN204964727U (en) | Power detection equipment | |
| CN209071636U (en) | A kind of anti-error hanging earthing conductor device | |
| CN106405308A (en) | Switch cabinet wire connection terminal electric leakage detection system | |
| CN207690733U (en) | A kind of quick, intelligent pole-mounted circuit breakers of 10KV | |
| CN103472345B (en) | A kind of electrical equipment grounding line burn-in test circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |