CN216052002U

CN216052002U - State detection circuit and socket

Info

Publication number: CN216052002U
Application number: CN202122632704.9U
Authority: CN
Inventors: 苏彩虹; 郭远平; 潘海波
Original assignee: Gongniu Group Co Ltd
Current assignee: Gongniu Group Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-03-15
Anticipated expiration: 2031-10-29

Abstract

The utility model relates to the technical field of electronic circuit detection, and provides a state detection circuit and a socket, wherein the state detection circuit is firstly arranged to detect the working state of a protection circuit and output a state detection signal to a processing circuit; and then the processing circuit controls the display state of the display circuit according to the state detection signal to represent the working state of the protection circuit according to the display state, thereby realizing the detection feedback of the working state of the protection circuit.

Description

State detection circuit and socket

Technical Field

The utility model relates to the technical field of electronic circuit detection, in particular to a state detection circuit and a socket.

Background

The input of electricity from the power grid to the household power network needs to be subjected to various levels of voltage transformation processing, the alternating current inevitably contains a plurality of interference signals or peak currents, and the prior art generally arranges a protection module in the socket to attenuate the peak currents or filter the interference signals.

Various sockets with protection functions are available on the market, but the detection of the working state of the protection module is lacked in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a state detection circuit and a socket, which can detect the working state of a socket protection module.

The utility model is realized by the following steps:

a state detection circuit comprises a protection circuit, a detection circuit, a processing circuit and a display circuit, wherein the protection circuit is electrically connected with the detection circuit, and the detection circuit and the display circuit are both electrically connected with the processing circuit;

the detection circuit is used for detecting the working state of the protection circuit and outputting a state detection signal to the processing circuit;

the processing circuit is used for controlling the display state of the display circuit according to the state detection signal; the display state represents an operating state of the protection circuit.

Further, the protection circuit comprises an anti-surge circuit, the detection circuit comprises a surge detection circuit, the anti-surge circuit is electrically connected with the surge detection circuit, the surge detection circuit is electrically connected with the processing circuit, and the display circuit comprises a surge display circuit;

the anti-surge circuit is used for performing surge protection on an input alternating current signal;

the surge detection circuit is used for detecting the working state of the anti-surge circuit and outputting a surge state detection signal to the processing circuit;

and the processing circuit controls the display state of the surge display circuit according to the surge state detection signal.

Furthermore, the anti-surge circuit comprises a fuse and a piezoresistor, the fuse and the piezoresistor are connected in series between a live wire and a zero wire of alternating current, and one end of the piezoresistor connected with the fuse is also electrically connected with the live wire of the alternating current;

the surge detection circuit comprises a first resistor, a second resistor and a third resistor, the first resistor, the second resistor and the third resistor are sequentially connected in series and then connected with the piezoresistor in parallel, and one end of the processing circuit is electrically connected between the second resistor and the third resistor.

Furthermore, the protection circuit comprises a filter circuit, the detection circuit comprises a first filter detection circuit and a second filter detection circuit, the input end of the filter circuit is electrically connected with the first filter detection circuit, the output end of the filter circuit is electrically connected with the second filter detection circuit, the first filter detection circuit and the second filter detection circuit are both electrically connected with the processing circuit, and the display circuit comprises a filter display circuit;

the filter circuit is used for filtering an input alternating current signal;

the first filtering detection circuit is used for carrying out filtering detection on the alternating current signal input into the filtering circuit to obtain a first filtering detection signal and transmitting the first filtering detection signal to the processing circuit;

the second filtering detection circuit is used for filtering and detecting the alternating current signal output by the filtering circuit to obtain a second filtering detection signal and transmitting the second filtering detection signal to the processing circuit; wherein the first filtered detection signal and the second filtered detection signal collectively characterize an operating state of the filter circuit;

the processing circuit is used for controlling the display state of the filtering display circuit according to the first filtering detection signal and the second filtering detection signal.

Further, the first filter detection circuit comprises a first diode, a fourth resistor, a fifth resistor, a sixth resistor, a first optical coupler and a first capacitor;

the first diode and the sixth resistor are connected in series between a zero line of alternating current and a second pin of the first optical coupler; the fourth resistor is electrically connected between the live wire of the alternating current and the first pin of the first optical coupler, and the fifth resistor is electrically connected between the first pin and the second pin of the first optical coupler;

the first capacitor is electrically connected between a third pin and a fourth pin of the first optical coupler, the fourth pin of the first optical coupler is grounded, and the third pin of the first optical coupler is electrically connected with the processing circuit;

the second filtering detection circuit comprises a second diode, a seventh resistor, an eighth resistor, a ninth resistor, a second optical coupler and a second capacitor;

the second diode and the ninth resistor are connected in series between the live wire of the alternating current and the second pin of the second optocoupler; the seventh resistor is electrically connected between a zero line of the alternating current and the first pin of the second optical coupler, and the eighth resistor is electrically connected between the first pin and the second pin of the second optical coupler;

the second capacitor is electrically connected between a third pin and a fourth pin of the second optical coupler, the fourth pin of the second optical coupler is grounded, and the third pin of the second optical coupler is electrically connected with the processing circuit.

Furthermore, the state detection circuit further comprises a metering circuit and a switching circuit, wherein one end of the switching circuit is electrically connected with the output end of the protection circuit, the other end of the switching circuit is electrically connected with the processing circuit, one end of the metering circuit is electrically connected between the output end of the protection circuit and the switching circuit, the other end of the metering circuit is electrically connected with the processing circuit, and the display circuit comprises an overload display circuit;

the metering circuit is used for collecting current parameters and power parameters of the alternating current signals output by the protection circuit and transmitting the current parameters and the power parameters to the processing circuit;

the processing circuit is used for controlling the on-off state of the switch circuit according to the current parameter and the power parameter and controlling the display state of the overload display circuit.

Furthermore, the state detection circuit further comprises a misconnection detection circuit, one end of the misconnection detection circuit is electrically connected with the input end of the protection circuit, the other end of the misconnection detection circuit is electrically connected with the processing circuit, and the display circuit comprises a misconnection display circuit;

the misconnection detection circuit is used for detecting a level signal of the input end of the protection circuit and transmitting the level signal to the processing circuit;

the processing circuit is used for controlling the display state of the misconnection display circuit according to the level signal.

Furthermore, the processing circuit comprises a judging circuit and a control circuit, and the detection circuit, the judging circuit, the control circuit and the display circuit are electrically connected in sequence;

the judging circuit is used for comparing the state detection signal with a set threshold value; when the state detection signal is larger than the set threshold, generating an indication signal and transmitting the indication signal to a control circuit;

the control circuit is used for controlling the display state of the display circuit according to the indication signal.

Further, the detection circuit is also used for detecting the temperature parameter of the protection circuit and transmitting the temperature parameter to the processing circuit;

the processing circuit is further used for controlling the display state of the display circuit according to the temperature parameter.

A socket comprising a condition detection circuit as claimed in any one of the preceding claims.

In summary, in the state detection circuit and the socket provided in the embodiments of the present invention, the detection circuit is first configured to detect the working state of the protection circuit, and output a state detection signal to the processing circuit; and then the processing circuit controls the display state of the display circuit according to the state detection signal to represent the working state of the protection circuit according to the display state, so that the detection of the working state of the protection circuit is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a state detection circuit according to an embodiment of the present invention.

Fig. 2 is another schematic structural diagram of a state detection circuit according to an embodiment of the present invention.

Fig. 3 is a circuit diagram of an anti-surge circuit and a surge detection circuit of the state detection circuit according to the embodiment of the present invention.

Fig. 4 is a second schematic structural diagram of a state detection circuit according to another embodiment of the present invention.

Fig. 5 is a circuit diagram of a first filtering detection circuit of the state detection circuit according to the embodiment of the present invention.

Fig. 6 is a circuit diagram of a second filtering detection circuit of the state detection circuit according to the embodiment of the present invention.

Fig. 7 is a third schematic structural diagram of a state detection circuit according to another embodiment of the present invention.

Fig. 8 is a circuit diagram of a metering circuit of the state detection circuit according to the embodiment of the present invention.

Fig. 9 is a fourth schematic structural diagram of a state detection circuit according to an embodiment of the present invention.

Fig. 10 is a fifth schematic structural diagram of a state detection circuit according to an embodiment of the present invention.

Fig. 11 is a circuit diagram of a misconnection detection circuit of a state detection circuit according to an embodiment of the present invention.

Fig. 12 is a sixth schematic structural diagram of a state detection circuit according to an embodiment of the present invention.

Fig. 13 is a seventh schematic structural diagram of a state detection circuit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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 invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention conventionally put into use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a state detection circuit 10 according to an embodiment of the present invention. The state detection circuit 10 includes a protection circuit 100, a detection circuit 200, a processing circuit 300, and a display circuit 400, wherein the protection circuit 100 is electrically connected to the detection circuit 200, and both the detection circuit 200 and the display circuit 400 are electrically connected to the processing circuit 300.

The detection circuit 200 is used for detecting the operating state of the protection circuit 100 and outputting a state detection signal to the processing circuit.

It is understood that the detection circuit 200 detects the operating state of the protection circuit 100 to obtain a state detection signal, and the state detection signal can represent the operating state of the protection circuit 100. The state detection signal may be a current signal or a voltage signal.

The processing circuit 300 is used for controlling the display state of the display circuit 400 according to the state detection signal.

In the present embodiment, the state detection signal may be a current signal or a voltage signal. The display state characterizes the operating state of the protection circuit 100.

It will be appreciated that the operating state of the protection circuit 100 may be represented in different display states by providing the display circuit 400 in order to present the operating state of the protection circuit 100 to a user.

In this embodiment, first, a detection circuit is provided to detect the operating state of the protection circuit, and output a state detection signal to the processing circuit; and then the processing circuit controls the display state of the display circuit according to the state detection signal to represent the working state of the protection circuit according to the display state, thereby realizing the detection feedback of the working state of the protection circuit.

Optionally, the display circuit 400 may include an indicator light, and the display state of the indicator light represents the operating state of the protection circuit 100.

In a possible implementation manner, please refer to fig. 2, and fig. 2 is another schematic structural diagram of the state detection circuit 10 according to an embodiment of the present invention. Wherein, the protection circuit 100 may include an anti-surge circuit 101, the detection circuit 200 may include a surge detection circuit 201, the anti-surge circuit 101 is electrically connected to the surge detection circuit 201, the surge detection circuit 201 is electrically connected to the processing circuit 300, and the display circuit 400 may include a surge display circuit 401.

And an anti-surge circuit 101 for performing surge protection on the input ac signal.

And a surge detection circuit 201 for detecting the operating state of the anti-surge circuit 101 and outputting a surge state detection signal to the processing circuit.

The processing circuit 300 controls the display state of the surge display circuit 401 according to the surge state detection signal.

Optionally, the surge display circuit 401 may include a surge display indicator light, and the display state of the surge display indicator light represents the operating state of the anti-surge circuit 101.

Optionally, referring to fig. 3, fig. 3 is a circuit diagram of an anti-surge circuit 101 and a surge detection circuit 201 of the state detection circuit 10 according to the embodiment of the present invention. The anti-surge circuit 101 comprises a fuse F1 and a piezoresistor VR1, the fuse F1 and the piezoresistor VR1 are connected in series between a live wire and a zero wire of alternating current, and one end of the piezoresistor VR1, which is connected with the fuse F1, is electrically connected with the live wire of the alternating current.

The surge detection circuit 201 comprises a first resistor R1, a second resistor R2 and a third resistor R3, wherein the first resistor R1, the second resistor R2 and the third resistor R3 are sequentially connected in series and then connected in parallel with a voltage dependent resistor VR1, and one end of a processing circuit 300 is electrically connected between the second resistor R2 and the third resistor R3.

The terminal a in fig. 3 is electrically connected to the processing circuit 300. When the ac current flowing through anti-surge circuit 101 contains a surge current, voltage dependent resistor VR1 will act to attenuate and absorb the surge current.

It will be appreciated that when the voltage across the voltage dependent resistor VR1 is below its threshold, the current flowing is very small, corresponding to a resistor of infinite resistance. That is, when the voltage across the voltage dependent resistor VR1 is below its threshold, the voltage dependent resistor VR may act as an open switch. When the voltage applied to the voltage dependent resistor VR1 exceeds its threshold, the current flowing through it increases dramatically, and the voltage dependent resistor VR1 behaves as an infinitely small resistor. That is, when the voltage across the voltage dependent resistor VR1 is above its threshold, the voltage dependent resistor VR1 acts as a closed switch.

Alternatively, the fuse F1 may be a fuse with overcurrent protection.

The anti-surge circuit 101 corresponds to three states:

(1) the non-working state: when no surge current exists in the alternating current entering the anti-surge circuit 101, the voltage dependent resistor VR1 is in a non-working state at the moment, that is, the anti-surge circuit 101 is in a non-working state;

(2) the working state is as follows: when the alternating current entering anti-surge circuit 101 contains surge current, resistor VR1 starts to act to absorb the surge current and is in a working state;

(3) failure state: when the surge current in the ac power entering anti-surge circuit 101 is too large and reaches the fusing point of fuse F1, anti-surge circuit 101 is in a failure state.

The processing circuit 300 receives the surge state detection signal from the a-terminal, determines the surge state detection signal, and controls the display state of the surge display circuit 401 according to the determination result.

When the anti-surge circuit 101 is in a non-working state, the indicator light of the surge display circuit 401 can be in a green normally-on state; when the anti-surge circuit 101 is in a working state, the indicator light of the surge display circuit 401 may be in a red flashing state; when anti-surge circuit 101 is in a failure state, the indicator light of surge display circuit 401 may be in a red normally on state. It should be noted that this example is only an example, and is not limited herein.

In another possible implementation manner, referring to fig. 4, fig. 4 is another schematic structural diagram of the state detection circuit 10 according to an embodiment of the present invention, in which the protection circuit 100 includes a filter circuit 110, the detection circuit 200 includes a first filter detection circuit 210 and a second filter detection circuit 220, an input terminal of the filter circuit 110 is electrically connected to the first filter detection circuit 210, an output terminal of the filter circuit 110 is electrically connected to the second filter detection circuit 220, both the first filter detection circuit 210 and the second filter detection circuit 220 are electrically connected to the processing circuit 300, and the display circuit 400 includes a filter display circuit 410.

The filter circuit 110 is configured to filter an input ac signal.

The first filtering detection circuit 210 is configured to perform filtering detection on the ac power signal input to the filtering circuit 110 to obtain a first filtering detection signal, and transmit the first filtering detection signal to the processing circuit 300.

The second filtering detection circuit 220 is configured to perform filtering detection on the ac signal output by the filtering circuit 110 to obtain a second filtering detection signal, and transmit the second filtering detection signal to the processing circuit 300.

In this embodiment, the first filtered detection signal and the second filtered detection signal collectively represent the operating state of the filter circuit.

The processing circuit 300 is configured to control the display state of the filtering display circuit 410 according to the first filtering detection signal and the second filtering detection signal.

Optionally, the filtering display circuit 410 may include a filtering display indicator light, and the display state of the filtering display indicator light represents the operation state of the filtering circuit 110.

Referring to fig. 5, fig. 5 is a circuit diagram of the first filter detection circuit 210 of the state detection circuit 10 according to the embodiment of the present invention. The first filter detection circuit 210 may include a first diode D1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first optocoupler OP1, and a first capacitor C1.

It is understood that the first optical coupler OP1 includes a total of four pins: a first pin, a second pin, a third pin, and a fourth pin.

The first diode D1 and the sixth resistor R6 are connected in series between the zero line of the alternating current and the second pin of the first optocoupler OP 1. The fourth resistor R4 is electrically connected between the live line of the alternating current and the first pin of the first optocoupler OP1, and the fifth resistor R5 is electrically connected between the first pin and the second pin of the first optocoupler OP 1.

The first capacitor C1 is electrically connected between the third pin and the fourth pin of the first optocoupler OP1, the fourth pin of the first optocoupler OP1 is grounded, and the third pin of the first optocoupler OP1 is electrically connected with the processing circuit 300.

It can be understood that the b-terminal in fig. 5 is electrically connected to the processing circuit 300, the ac power at the input end of the filter circuit 110 enters the first filter detection circuit 210, the first diode D1 is rectified, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are divided, and then the square wave signal is obtained through the first optical coupler OP1, and then the square wave signal is filtered through the first capacitor C1 to obtain the first filter detection signal. The first filtered detection signal is transmitted to the processing circuit 300 via the b-terminal.

Referring to fig. 6, fig. 6 is a circuit diagram of a second filtering detection circuit 220 of the state detection circuit 10 according to the embodiment of the present invention. The second filter detection circuit 220 includes a second diode D2, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second photo coupler OP2, and a second capacitor C2.

The second diode D2 and the ninth resistor R9 are connected in series between the hot line of the alternating current and the second pin of the second optocoupler OP 2. The seventh resistor R7 is electrically connected between the zero line of the alternating current and the first pin of the second optocoupler OP2, and the eighth resistor R8 is electrically connected between the first pin and the second pin of the second optocoupler OP 2.

The second capacitor C2 is electrically connected between the third pin and the fourth pin of the second optocoupler OP2, the fourth pin of the second optocoupler OP2 is grounded, and the third pin of the second optocoupler OP2 is electrically connected to the processing circuit.

It is understood that the terminal c in fig. 6 is electrically connected to the processing circuit 300, and the second filtered detection signal obtained by the second filtered detection circuit 220 is transmitted to the processing circuit 300 through the terminal c. It should be noted that the circuit structure of the second filter detection circuit 220 is similar to that of the first filter detection circuit 210, and the working principle thereof is also similar to that of the first filter detection circuit 210, which is not described herein again.

It is understood that the processing circuit 300 performs a comparison analysis on the first filtered detection signal and the second filtered detection signal, and controls the display status of the filtering display circuit 410 according to the analysis result.

When clutter signals exist in the alternating current, the filter circuit is in a filter state, an indicator light of the filter display circuit 410 can be in a red flashing state, and the flashing frequency of the indicator light can be controlled according to the size of the clutter signals; when there is no noise signal in the ac power, the filter circuit is in an unfiltered state, and the indicator light of the filter display circuit 410 may be in a green normally on state. It should be noted that this example is only an example, and is not limited herein.

In another possible implementation manner, please refer to fig. 7, and fig. 7 is another schematic structural diagram of the state detection circuit 10 according to an embodiment of the present invention. The state detection circuit 10 may further include a switch circuit 500 and a metering circuit 600, one end of the switch circuit 500 is electrically connected to the output end of the protection circuit 100, and the other end of the switch circuit 500 is electrically connected to the processing circuit; one end of the metering circuit 600 is electrically connected between the output end of the protection circuit 100 and the switch circuit 500, the other end of the metering circuit 600 is electrically connected with the processing circuit 300, and the display circuit 400 includes the overload display circuit 402.

The metering circuit 600 is configured to collect a current parameter and a power parameter of the ac electrical signal output by the protection circuit 100, and transmit the current parameter and the power parameter to the processing circuit 300.

The processing circuit 300 is configured to control the on/off state of the switch circuit 500 according to the current parameter and the power parameter, and control the display state of the overload display circuit 402.

Optionally, the overload display circuit 402 may include an overload display indicator, and the display state of the overload display indicator represents the overload state at the output of the protection circuit.

Referring to fig. 8, fig. 8 is a circuit diagram of a metering circuit 600 of the state detection circuit 10 according to the embodiment of the present invention. The metrology circuit 600 may include an HLW8032/SOP8 metrology chip and its peripheral circuits. The capacitors C1 and C2 are sequentially connected in series and then electrically connected between

pins

2 and 3 of the metering chip; the resistor R2 is connected between the zero line and the pin 2 of the metering chip; the resistor R3 is connected between the zero line and the pin 3 of the metering chip; the resistor R1 is connected in series between the zero lines; the resistors R5, R6, R7 and R8 are sequentially connected in series, one end of the resistor is connected with a live wire, and the other end of the resistor is connected with a pin 4 of the metering chip; one end of the resistor R9 is grounded after being connected with the capacitor C4 in parallel, and the other end of the resistor R9 is connected with a pin 4 of the metering chip; one end of the capacitor C3 is grounded, and the other end is connected with a pin 1 of the metering chip; one end of the resistor R4 is connected with 5V power voltage, and the other end is connected with a pin of the metering chip; pin 8 of the metering chip is grounded, and pin 7 of the metering chip is connected to the processing circuit 300, i.e., the d terminal in fig. 8 is connected to the processing circuit 300.

The zero line and the PGND are collinear, wherein the resistor R1 is a sampling resistor with the resistance of 1m omega, and the resistors R5, R6, R7 and R8 are all voltage dividing resistors with the resistance of 470K omega.

During circuit operation, the collected current parameters and power parameters are sent to the processing circuit 300 through the d-terminal.

Optionally, when the processing circuit 300 determines the overload state of the circuit according to the current parameter and the power parameter: when the circuit is in a current overload or power overload state, the processing circuit 300 may control the indicator light of the overload display circuit 402 to be in a red flashing state; when the circuit is in the non-overload state, the processing circuit 300 may control the indicator light of the overload display circuit 402 to be in a green normally-on state; when the current or power overload exceeds the threshold, the processing circuit 300 may control the switching circuit to be in an off state to protect the circuit, and the indicator light of the overload display circuit 402 may be in a red normally on state. It should be noted that this example is only an example, and is not limited herein.

Optionally, referring to fig. 9, fig. 9 is another schematic structural diagram of the state detection circuit 10 according to the embodiment of the present invention. The status detection circuit 10 further includes a communication circuit 700, and the communication circuit 700 is electrically connected to both the processing circuit 300 and the metering circuit 600.

The metering circuit 600 is also configured to send the current parameter and the power parameter to the communication circuit 700.

The processing circuit 300 is further configured to control the communication circuit 700 to transmit the current parameter and the power parameter to a remote terminal or a cloud.

In another possible implementation manner, please refer to fig. 10, and fig. 10 is a schematic structural diagram of a state detection circuit 10 according to an embodiment of the present invention. The state detection circuit 10 further includes a misconnection detection circuit 800, one end of the misconnection detection circuit 800 is electrically connected to the input end of the protection circuit 100, the other end of the misconnection detection circuit 800 is electrically connected to the processing circuit 300, and the display circuit 400 includes a misconnection display circuit 403.

The misconnection detection circuit 800 is used for detecting a level signal at the input terminal of the protection circuit 100 and transmitting the level signal to the processing circuit 300.

The processing circuit 300 is used for controlling the display state of the misconnection display circuit 403 according to the level signal.

Optionally, the misconnection display circuit 403 may include a misconnection indicator, when the zero line and the live line connected to the input end of the protection circuit 100 are correctly connected, the detected level signal is a high level signal, and the processing circuit 300 controls the misconnection indicator to be in a green normally-on state according to the level signal; when the connection between the zero line and the live line connected to the input end of the protection circuit 100 is wrong, the detected level signal is a low level signal, and the processing circuit 300 controls the misconnection indicator lamp to be in a red flashing state according to the level signal. It should be noted that this example is only an example, and is not limited herein.

Optionally, referring to fig. 11, fig. 11 is a circuit diagram of a misconnection detection circuit 800 of the state detection circuit 10 according to the embodiment of the present invention. The misconnection detection circuit 800 comprises a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12 and a thirteenth resistor R13, wherein the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12 and the thirteenth resistor R13 are sequentially connected in series between the input end of the protection circuit 100 and the processing circuit 300.

It is understood that, as shown in fig. 11, the e terminal is connected to the input terminal of the protection circuit 100, and the f terminal is connected to the processing circuit 300.

Alternatively, the processing circuit 300 may comprise an integrated circuit chip having signal processing capabilities. The integrated circuit chip may be, but is not limited to, a Central Processing Unit (CPU), a Network Processor (NP), and the like, of a Micro Controller Unit (MCU); the device may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, and the like.

In another possible implementation manner, in order to relieve the pressure of data processing on the state detection signal by a single chip, referring to fig. 12, the processing circuit 300 may include a determining circuit 310 and a control circuit 320, and the detecting circuit 200, the determining circuit 310, the control circuit 320 and the display circuit 400 are electrically connected in sequence.

The judging circuit 310 is used for comparing the state detection signal with a set threshold value; when the state detection signal is greater than the set threshold, an indication signal is generated and transmitted to the control circuit 320.

The control circuit 320 is used for controlling the display state of the display circuit 400 according to the indication signal.

Alternatively, the determination circuit 310 and the control circuit 320 may each comprise an integrated circuit chip having signal processing capabilities. The integrated circuit chip may be, but is not limited to, a Central Processing Unit (CPU), a Network Processor (NP), and the like, of a Micro Controller Unit (MCU); the device may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, and the like.

For example, the determining circuit 310 may include an HLW8032 series metering chip, and the control circuit 320 may include a micro control unit. It should be noted that this example is only an example, and is not limited herein.

In another possible embodiment, the detection circuit 200 may also be configured to detect a temperature parameter of the protection circuit 100 and transmit the temperature parameter to the processing circuit 300;

the processing circuit 300 is further configured to control a display state of the display circuit 400 according to the temperature parameter.

It can be understood that when the processing circuit 300 determines that the temperature parameter acquired by the detection circuit 200 exceeds the set temperature threshold, the indicator light of the display circuit is controlled to be in a red flashing state, which represents that the protection circuit is working; when the processing circuit 300 determines that the temperature parameter acquired by the detection circuit 200 does not exceed the set temperature threshold, the indicator light of the display circuit is controlled to be in a green normally-on state, which indicates that the protection circuit is not in a working state. It should be noted that this example is only an example, and is not limited herein.

Referring to fig. 13, fig. 13 is another schematic structural diagram of a state detection circuit 10 according to an embodiment of the present invention, where the state detection circuit 10 includes an anti-surge circuit 101, a surge detection circuit 102, a filter circuit 110, a first filter detection circuit 210, a second filter detection circuit 220, a switch circuit 500, a metering circuit 600, a processing circuit 300, a display circuit 400, a communication circuit 700, an erroneous connection detection circuit 800, and a power supply circuit 900.

The specific circuit structure of each circuit is as described above, and is not described herein.

The misconnection detection circuit 800 has one end connected with alternating current and the other end connected with the processing circuit 300; the anti-surge circuit 101 is electrically connected with the alternating current, the filter circuit 110 and the surge detection circuit 102, and the surge detection circuit 102 is also electrically connected with the processing circuit 300; one end of the first filter detection circuit 210 is electrically connected to the input end and the output end of the filter circuit 110, and the second filter detection circuit 220 is electrically connected to the processing circuit 300; the switch circuit 500, the metering circuit 600 and the power circuit 900 are electrically connected to the output end of the filter circuit 110; the metering circuit 600 is also electrically connected with the processing circuit 300 and the communication circuit 700; the power circuit 900 is also electrically connected to the switching circuit 500, the metering circuit 600, the processing circuit 300, the display circuit 400, and the communication circuit 700.

It is understood that the display circuit 400 may include a misconnection display circuit 403, a surge display circuit 401, a filter display circuit 410, and an overload display circuit 402.

The power circuit 900 is used for converting 220V ac power into 5V dc low voltage to supply power to circuits requiring dc low voltage operating voltage, such as the switch circuit 500, the metering circuit 600, the processing circuit 300, the display circuit 400, and the communication circuit 700.

In an alternative embodiment, the power circuit 900 may be implemented by a rc buck circuit, an isolated power supply, a non-isolated power supply, a Low Dropout Regulator (LDO) linear buck, or the like.

The operation principle of the state detection circuit 10 shown in fig. 13 is as follows:

first, the anti-surge circuit 101 and the misconnection detection circuit 800 of the state detection circuit 10 receive ac: the misconnection detection circuit 800 is used for detecting a level signal at the input end of the anti-surge circuit 101 and transmitting the level signal to the processing circuit 300, and the processing circuit 300 controls the display state of the misconnection display circuit 403 according to the level signal.

The anti-surge circuit 101 is used for performing surge protection on an input alternating current signal; the surge detection circuit 102 is used for detecting the working state of the anti-surge circuit 101 and outputting a surge state detection signal to the processing circuit; the processing circuit 300 controls the display state of the surge display circuit 401 according to the surge state detection signal.

The filter circuit 110 is used for filtering the ac signal at the input end of the anti-surge circuit 101; the first filtering detection circuit 210 is configured to perform filtering detection on the ac electrical signal at the input end of the filtering circuit 110 to obtain a first filtering detection signal, and transmit the first filtering detection signal to the processing circuit 300; the second filtering detection circuit 220 is configured to perform filtering detection on the ac electrical signal at the output end of the filtering circuit 110 to obtain a second filtering detection signal, and transmit the second filtering detection signal to the processing circuit 300; the processing circuit 300 is configured to control the display state of the filtering display circuit 410 according to the first filtering detection signal and the second filtering detection signal.

The metering circuit 600 is configured to collect a current parameter and a power parameter of the ac electrical signal at the output end of the filter circuit 110, and transmit the current parameter and the power parameter to the processing circuit 300; the processing circuit 300 controls the on/off state of the switching circuit 500 according to the current parameter and the power parameter, and controls the display state of the overload display circuit 402. The metering circuit 600 is further configured to send the current parameter and the power parameter to the communication circuit 700; the processing circuit 300 is further configured to control the communication circuit 700 to transmit the current parameter and the power parameter to a remote terminal or a cloud.

Based on the status detection circuit 10, an embodiment of the present invention further provides a socket, including any of the status detection circuits 10 described above.

To sum up, the state detection circuit and the socket provided by the embodiment of the utility model detect the working state of the protection circuit by setting the detection circuit, and output a state detection signal to the processing circuit; and then the processing circuit controls the display state of the display circuit according to the state detection signal to represent the working state of the protection circuit according to the display state, so that the detection feedback of the working states of the anti-surge circuit and the filter circuit in the protection circuit and the detection of the overload state of the circuit are realized.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A state detection circuit is characterized by comprising a protection circuit, a detection circuit, a processing circuit and a display circuit, wherein the protection circuit is electrically connected with the detection circuit, and the detection circuit and the display circuit are both electrically connected with the processing circuit;

2. The condition detection circuit of claim 1, wherein the protection circuit comprises an anti-surge circuit, the detection circuit comprises a surge detection circuit, the anti-surge circuit is electrically connected with the surge detection circuit, the surge detection circuit is electrically connected with the processing circuit, and the display circuit comprises a surge display circuit;

3. The state detection circuit according to claim 2, wherein the anti-surge circuit comprises a fuse and a varistor, the fuse and the varistor are connected in series between a live line and a neutral line of an alternating current, and one end of the varistor connected to the fuse is further electrically connected to the live line of the alternating current;

4. The status detection circuit of claim 1, wherein the protection circuit comprises a filter circuit, the detection circuit comprises a first filter detection circuit and a second filter detection circuit, an input of the filter circuit is electrically connected to the first filter detection circuit, an output of the filter circuit is electrically connected to the second filter detection circuit, the first filter detection circuit and the second filter detection circuit are both electrically connected to the processing circuit, and the display circuit comprises a filter display circuit;

the filter circuit is used for filtering an input alternating current signal;

5. The state detection circuit of claim 4, wherein the first filter detection circuit comprises a first diode, a fourth resistor, a fifth resistor, a sixth resistor, a first optocoupler, and a first capacitor;

6. The status detection circuit according to claim 1, further comprising a metering circuit and a switching circuit, wherein one end of the switching circuit is electrically connected to the output terminal of the protection circuit, the other end of the switching circuit is electrically connected to the processing circuit, one end of the metering circuit is electrically connected between the output terminal of the protection circuit and the switching circuit, the other end of the metering circuit is electrically connected to the processing circuit, and the display circuit comprises an overload display circuit;

7. The status detection circuit according to claim 1, further comprising a misconnection detection circuit, one end of the misconnection detection circuit being electrically connected to the input terminal of the protection circuit, the other end of the misconnection detection circuit being electrically connected to the processing circuit, the display circuit comprising a misconnection display circuit;

8. The status detection circuit according to claim 1, wherein the processing circuit includes a judgment circuit and a control circuit, and the detection circuit, the judgment circuit, the control circuit and the display circuit are electrically connected in this order;

9. The status detection circuit of claim 1, wherein the detection circuit is further configured to detect a temperature parameter of the protection circuit and transmit the temperature parameter to the processing circuit;

10. A socket comprising the condition detecting circuit as claimed in any one of claims 1 to 9.