CN212586526U - Circuit and equipment for monitoring on-off of grounding - Google Patents
Circuit and equipment for monitoring on-off of grounding Download PDFInfo
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- CN212586526U CN212586526U CN201922327189.6U CN201922327189U CN212586526U CN 212586526 U CN212586526 U CN 212586526U CN 201922327189 U CN201922327189 U CN 201922327189U CN 212586526 U CN212586526 U CN 212586526U
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Abstract
The application provides a circuit and equipment for monitoring grounding on-off, wherein the circuit comprises an on-off signal acquisition component, an on-off signal judgment component, a control component and a warning component; under the condition that the grounding device is communicated, the on-off signal acquisition component acquires a communication signal and sends the communication signal to the on-off signal judgment component, and the on-off signal judgment component generates a low level signal according to the communication signal and sends the low level signal to the control component; the control component receives a low level signal and keeps a default state; under the condition that the grounding device is disconnected, the on-off signal acquisition component acquires a disconnection signal and sends the disconnection signal to the on-off signal judgment component, and the on-off signal judgment component generates a high-level signal according to the disconnection signal and sends the high-level signal to the control component; the control component generates a warning signal according to the high-level signal and sends the warning signal to the warning component. The complicated process of installing the auxiliary electrode is omitted, and the use cost and the installation cost are reduced.
Description
Technical Field
The application relates to the field of detection circuits, in particular to a circuit and equipment for monitoring grounding on-off.
Background
At present, the existing grounding detection generally measures the size of a grounding resistor by a three-pole method, but the auxiliary electrode is difficult to construct and install in certain specific environments, such as urban buildings.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present application is proposed to provide a circuit and a device for monitoring ground switching that overcomes or at least partially solves the above mentioned problems, comprising:
a circuit for monitoring grounding on-off comprises an on-off signal acquisition component, an on-off signal judgment component, a control component and a warning component;
one end of the on-off signal acquisition component is respectively connected with the live wire and the grounding device, and the other end of the on-off signal acquisition component is connected with the control component through the on-off signal judgment component;
under the condition that the grounding device is communicated, the on-off signal acquisition component acquires a communication signal and sends the communication signal to the on-off signal judgment component, and the on-off signal judgment component generates a low level signal according to the communication signal and sends the low level signal to the control component; the control component receives the low level signal and keeps a default state;
under the condition that the grounding device is disconnected, the on-off signal acquisition component acquires a disconnection signal and sends the disconnection signal to the on-off signal judgment component, and the on-off signal judgment component generates a high level signal according to the disconnection signal and sends the high level signal to the control component; the control component generates a warning signal according to the high level signal and sends the warning signal to the warning component.
Further, the device also comprises a current limiting component,
the live wire is connected with the on-off signal acquisition assembly through the current limiting assembly, and current flowing into the on-off signal acquisition assembly from the live wire is reduced.
Further, still include the rectification subassembly: the on-off signal acquisition component is connected with the on-off signal judgment component through the rectification component.
Further, the on-off signal acquisition assembly comprises a current transformer T1 and a resistor R2,
one primary end of the current transformer T1 is connected with a live wire through the current limiting assembly, and the other primary end of the current transformer T1 is connected with the grounding device to obtain an on-off signal of the grounding device;
the primary end of the current transformer T1 is connected with the ground wire, the other secondary end of the current transformer T1 is connected with the rectifying component, the current transformer T1 isolates the mains supply circuit from the detection circuit, generates mutual inductance current according to the on-off condition of the mains supply ground wire, and sends the mutual inductance current to the rectifying component;
one end of the resistor R2 is connected between the secondary end of the current transformer T1 and the ground wire, and the other end is connected between the other secondary end of the current transformer T1 and the rectifying component.
Further, the on-off signal determination module includes: a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a bidirectional transient suppression diode D1, a triode Q1,
one end of the resistor R3 is connected with the rectifying component, and the other end of the resistor R3 is connected with the base electrode of the triode;
one end of the bidirectional transient suppression diode D1 is connected between the resistor R3 and the rectifying component, and the other end of the bidirectional transient suppression diode D1 is connected with the emitter of the triode Q1;
the capacitor C1 has one end connected between the resistor R3 and the base of the transistor Q1, and the other end connected between the diode D1 and the emitter of the transistor Q1;
the collector of the triode Q1 is connected with an internal power supply through the resistor R4, the collector of the triode Q1 is also connected with the control component, and the emitter of the triode Q1 is also connected with the ground wire;
one end of the capacitor C2 is connected between the emitter of the transistor Q1 and the ground wire, and the other end is connected between the collector of the transistor Q1 and the control component;
under the condition that the grounding device is communicated, the current transformer T1 generates an electric signal to be sent to the base electrode of the triode Q1, the triode Q1 is kept communicated, and the collector electrode of the triode Q1 and a control component are in a low-level state;
when the grounding device is disconnected, the current transformer T1 is disconnected, no signal is received at the base of the transistor Q1, and the transistor Q1 is turned off, so that the high level state is kept between the collector of the transistor Q1 and the control component.
Further, the current limiting component is a resistor R1 with the resistance value of 10M omega or more.
Further, the rectifying component is a diode D2.
Further, the transistor Q1 is an NPN transistor.
An apparatus comprising a circuit for monitoring ground make and break as described in any of the above embodiments.
The application has the following advantages:
in the embodiment of the application, one end of the on-off signal acquisition component is respectively connected with the live wire and the grounding device, and the other end of the on-off signal acquisition component is connected with the control component through the on-off signal judgment component; under the condition that the grounding device is communicated, the on-off signal acquisition component acquires a communication signal and sends the communication signal to the on-off signal judgment component, and the on-off signal judgment component generates a low level signal according to the communication signal and sends the low level signal to the control component; the control component receives the low level signal and keeps a default state; under the condition that the grounding device is disconnected, the on-off signal acquisition component acquires a disconnection signal and sends the disconnection signal to the on-off signal judgment component, and the on-off signal judgment component generates a high level signal according to the disconnection signal and sends the high level signal to the control component; the control component generates a warning signal according to the high level signal and sends the warning signal to the warning component. The complicated process of installing the auxiliary electrode is omitted, the use cost and the installation cost are reduced, and the installation portability is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the present application will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic block diagram of a circuit for monitoring ground connection according to an embodiment of the present disclosure;
fig. 2 is a schematic block diagram of a circuit for monitoring ground connection according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit structure diagram of a circuit for monitoring ground connection disconnection according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that, in any embodiment of the present invention, the grounding device may be any one or combination of a grounding bar, a grounding wire, and a grounding wire bar.
Referring to fig. 1, a circuit for monitoring ground connection according to an embodiment of the present application is shown, where the circuit includes a connection/disconnection signal obtaining component, a connection/disconnection signal determining component, a control component, and a warning component;
one end of the on-off signal acquisition component is respectively connected with the live wire and the grounding device, and the other end of the on-off signal acquisition component is connected with the control component through the on-off signal judgment component;
under the condition that the grounding device is communicated, the on-off signal acquisition component acquires a communication signal and sends the communication signal to the on-off signal judgment component, and the on-off signal judgment component generates a low level signal according to the communication signal and sends the low level signal to the control component; the control component receives the low level signal and keeps a default state;
under the condition that the grounding device is disconnected, the on-off signal acquisition component acquires a disconnection signal and sends the disconnection signal to the on-off signal judgment component, and the on-off signal judgment component generates a high level signal according to the disconnection signal and sends the high level signal to the control component; the control component generates a warning signal according to the high level signal and sends the warning signal to the warning component.
In the embodiment of the application, one end of the on-off signal acquisition component is respectively connected with the live wire and the grounding device, and the other end of the on-off signal acquisition component is connected with the control component through the on-off signal judgment component; under the condition that the grounding device is communicated, the on-off signal acquisition component acquires a communication signal and sends the communication signal to the on-off signal judgment component, and the on-off signal judgment component generates a low level signal according to the communication signal and sends the low level signal to the control component; the control component receives the low level signal and keeps a default state; under the condition that the grounding device is disconnected, the on-off signal acquisition component acquires a disconnection signal and sends the disconnection signal to the on-off signal judgment component, and the on-off signal judgment component generates a high level signal according to the disconnection signal and sends the high level signal to the control component; the control component generates a warning signal according to the high level signal and sends the warning signal to the warning component. The complicated process of installing the auxiliary electrode is omitted, the use cost and the installation cost are reduced, and the installation portability is improved.
It should be noted that, the control component 110 is an MCU, and acquires a connection signal or a disconnection signal of the ground device through a current transformer T1, and when the ground device is connected, the connection and disconnection signal acquisition component acquires a connection signal, that is, the current transformer T1 generates an electrical signal, and sends the connection signal to the connection and disconnection signal determination component, the connection and disconnection signal determination component generates a low level signal according to the connection signal, and the connection and disconnection signal determination component controls the on-off of an internal triode according to the electrical signal sent by the current transformer T1, so that the level signal sent by the connection and disconnection signal determination component is a low level signal, and sends the low level signal to the control component; the control component receives the low level signal and keeps a default state;
under the condition that the grounding device is disconnected, the on-off signal acquisition component acquires a disconnection signal, namely no electric signal is generated by the current transformer T1, and sends the disconnection signal to the on-off signal judgment component, the on-off signal judgment component generates a high level signal according to the disconnection signal, and the on-off signal judgment component does not receive the electric signal sent by the current transformer T1, so that an internal triode is powered off and closed, the level signal sent by the on-off signal judgment component is a high level signal, and the high level signal is sent to the control component; the control component generates a warning signal according to the high level signal and sends the warning signal to the warning component.
Referring to fig. 2, in one embodiment, a current limiting assembly is further included,
the live wire is connected with the on-off signal acquisition assembly through the current limiting assembly, and current flowing into the on-off signal acquisition assembly from the live wire is reduced.
Referring to fig. 2, in an embodiment, the rectifier assembly further includes: the on-off signal acquisition component is connected with the on-off signal judgment component through the rectification component. The rectification component rectifies the electric signal transmitted by the on-off signal acquisition component, so that the noise current of the electric signal transmitted to the on-off signal judgment component is reduced.
Referring to fig. 3, in one embodiment, the on-off signal acquisition assembly includes a current transformer T1 and a resistor R2,
one primary end of the current transformer T1 is connected with a live wire through the current limiting assembly, and the other primary end of the current transformer T1 is connected with the grounding device to obtain an on-off signal of the grounding device;
the primary end of the current transformer T1 is connected with the ground wire, the other secondary end of the current transformer T1 is connected with the rectifying component, the current transformer T1 isolates the mains supply circuit from the detection circuit, generates mutual inductance current according to the on-off condition of the mains supply ground wire, and sends the mutual inductance current to the rectifying component;
one end of the resistor R2 is connected between the secondary end of the current transformer T1 and the ground wire, and the other end is connected between the other secondary end of the current transformer T1 and the rectifying component.
The current transformer T1 isolates the external commercial power circuit part from the monitoring circuit part, so that the interference of external signals to the whole system is reduced, and compared with the scheme in the prior art, the isolation is better and the anti-interference capability is stronger.
Referring to fig. 3, in one embodiment, the on/off signal determining assembly includes: a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a bidirectional transient suppression diode D1, a triode Q1,
one end of the resistor R3 is connected with the rectifying component, and the other end of the resistor R3 is connected with the base electrode of the triode;
one end of the bidirectional transient suppression diode D1 is connected between the resistor R3 and the rectifying component, and the other end of the bidirectional transient suppression diode D1 is connected with the emitter of the triode Q1;
the capacitor C1 has one end connected between the resistor R3 and the base of the transistor Q1, and the other end connected between the diode D1 and the emitter of the transistor Q1;
the collector of the triode Q1 is connected with an internal power supply through the resistor R4, the collector of the triode Q1 is also connected with the control component, and the emitter of the triode Q1 is also connected with the ground wire;
one end of the capacitor C2 is connected between the emitter of the transistor Q1 and the ground wire, and the other end is connected between the collector of the transistor Q1 and the control component;
under the condition that the grounding device is communicated, the current transformer T1 generates an electric signal to be sent to the base electrode of the triode Q1, the triode Q1 is kept communicated, and the collector electrode of the triode Q1 and a control component are in a low-level state;
when the grounding device is disconnected, the current transformer T1 is disconnected, no signal is received at the base of the transistor Q1, and the transistor Q1 is turned off, so that the high level state is kept between the collector of the transistor Q1 and the control component.
In one embodiment, the current limiting device is a resistor R1 with a resistance of 10M Ω or more.
In one embodiment, the rectifying component is a diode D2.
In one embodiment, the transistor Q1 is an NPN transistor.
Referring to fig. 3, in a specific implementation, a live wire connected to a 220V commercial power is connected to a current transformer T1 through a resistor R1, and is connected to a ground wire at a grounding device to form a primary-side loop. A resistor R2 is connected at the secondary end, and then the rectification is carried out through a diode D1 to control the base electrode of a triode Q1;
when the grounding device is in a connection state, the triode Q1 is turned on, and the diagram TPE is at a low level and is transmitted to the IO port of the MCU for processing.
When the grounding device is in an off state, no voltage is output from the secondary end of the current transformer T1, the triode Q1 is cut off, the TPE is at a high level, and the MCU gives a corresponding alarm after detecting. The resistance of the resistor R1 is large, so that the current is 220V/10M omega-22 uA; the leakage switch is not affected. Another function of the current transformer T1 is to isolate weak current from mains.
Also shown is a method for monitoring ground connection breaking provided by an embodiment of the present application, which is applied to the circuit for monitoring ground connection breaking described in any one of the above embodiments,
under the condition that the grounding device is communicated, acquiring a communication signal, generating a low level signal according to the communication signal, and maintaining a default state according to the low level signal;
when the grounding device is disconnected, a disconnection signal is acquired, a high-level signal is generated according to the disconnection signal, and a warning signal is generated according to the high-level signal.
The application also discloses equipment of an embodiment, which comprises the circuit for monitoring the on-off of the ground connection according to any embodiment.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The circuit and the device for monitoring the on-off of the ground provided by the application are introduced in detail, a specific example is applied in the circuit to explain the principle and the implementation mode of the application, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (9)
1. A circuit for monitoring grounding on-off is characterized by comprising an on-off signal acquisition component, an on-off signal judgment component, a control component and a warning component;
one end of the on-off signal acquisition component is respectively connected with the live wire and the grounding device, and the other end of the on-off signal acquisition component is connected with the control component through the on-off signal judgment component;
under the condition that the grounding device is communicated, the on-off signal acquisition component acquires a communication signal and sends the communication signal to the on-off signal judgment component, and the on-off signal judgment component generates a low level signal according to the communication signal and sends the low level signal to the control component; the control component receives the low level signal and keeps a default state;
under the condition that the grounding device is disconnected, the on-off signal acquisition component acquires a disconnection signal and sends the disconnection signal to the on-off signal judgment component, and the on-off signal judgment component generates a high level signal according to the disconnection signal and sends the high level signal to the control component; the control component generates a warning signal according to the high level signal and sends the warning signal to the warning component.
2. The circuit of claim 1, further comprising a current limiting component,
the live wire is connected with the on-off signal acquisition assembly through the current limiting assembly, and current flowing into the on-off signal acquisition assembly from the live wire is reduced.
3. The circuit of claim 2, further comprising a rectifying component: the on-off signal acquisition component is connected with the on-off signal judgment component through the rectification component.
4. The circuit of claim 3, wherein the on-off signal acquisition component comprises a current transformer T1 and a resistor R2,
one primary end of the current transformer T1 is connected with a live wire through the current limiting assembly, and the other primary end of the current transformer T1 is connected with the grounding device to obtain an on-off signal of the grounding device;
the primary end of the current transformer T1 is connected with the ground wire, the other secondary end of the current transformer T1 is connected with the rectifying component, the current transformer T1 isolates the mains supply circuit from the detection circuit, generates mutual inductance current according to the on-off condition of the mains supply ground wire, and sends the mutual inductance current to the rectifying component;
one end of the resistor R2 is connected between the secondary end of the current transformer T1 and the ground wire, and the other end is connected between the other secondary end of the current transformer T1 and the rectifying component.
5. The circuit of claim 4, wherein the on-off signal determination component comprises: a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a bidirectional transient suppression diode D1, a triode Q1,
one end of the resistor R3 is connected with the rectifying component, and the other end of the resistor R3 is connected with the base electrode of the triode;
one end of the bidirectional transient suppression diode D1 is connected between the resistor R3 and the rectifying component, and the other end of the bidirectional transient suppression diode D1 is connected with the emitter of the triode Q1;
the capacitor C1 has one end connected between the resistor R3 and the base of the transistor Q1, and the other end connected between the diode D1 and the emitter of the transistor Q1;
the collector of the triode Q1 is connected with an internal power supply through the resistor R4, the collector of the triode Q1 is also connected with the control component, and the emitter of the triode Q1 is also connected with the ground wire;
one end of the capacitor C2 is connected between the emitter of the transistor Q1 and the ground wire, and the other end is connected between the collector of the transistor Q1 and the control component;
under the condition that the grounding device is communicated, the current transformer T1 generates an electric signal to be sent to the base electrode of the triode Q1, the triode Q1 is kept communicated, and the collector electrode of the triode Q1 and a control component are in a low-level state;
when the grounding device is disconnected, the current transformer T1 is disconnected, no signal is received at the base of the transistor Q1, and the transistor Q1 is turned off, so that the high level state is kept between the collector of the transistor Q1 and the control component.
6. The circuit of claim 2, wherein the current limiting component is a resistor R1 having a resistance of 10M Ω or more.
7. The circuit of claim 3, wherein the rectifying component is a diode D2.
8. The circuit of claim 5, wherein the transistor Q1 is an NPN transistor.
9. An apparatus comprising a circuit for monitoring ground make and break as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922327189.6U CN212586526U (en) | 2019-12-20 | 2019-12-20 | Circuit and equipment for monitoring on-off of grounding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922327189.6U CN212586526U (en) | 2019-12-20 | 2019-12-20 | Circuit and equipment for monitoring on-off of grounding |
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| Publication Number | Publication Date |
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| CN212586526U true CN212586526U (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922327189.6U Active CN212586526U (en) | 2019-12-20 | 2019-12-20 | Circuit and equipment for monitoring on-off of grounding |
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