CN111355107B - Intelligent socket - Google Patents

Abstract

The invention provides an intelligent socket which comprises a live wire input end, a zero line input end, a live wire output end and a zero line output end, wherein the live wire input end is connected with the zero line input end; the input end of the live wire is connected with the input end of the magnetic-sensing detection element, the output end of the magnetic-sensing detection element is connected with the coil of the relay, and the coil of the relay is connected with the input end of the zero line; a first normally open contact of the relay is connected between the input end of the live wire and the output end of the live wire in series, and a second normally open contact of the relay is connected between the input end of the zero line and the output end of the zero line in series; and the live wire output end and the zero line output end are both connected with a power plug of a load. The invention adopts the magnetic-sensing detection element, can detect whether a power plug of a load is inserted into the socket, controls the on-off of the power supply, effectively saves electric energy and improves the reliability of the product; and a temperature sensor, a humidity sensor and a microcontroller circuit are adopted for detecting the temperature and the humidity of the live wire reed and the zero wire reed in real time, so that the fire caused by electric leakage, short circuit or socket overheating caused by insulation reduction is avoided.

Description

a smart socket

technical field

The invention relates to the technical field of power sockets, in particular to a smart socket.

Background technique

Since the 1980s, the incidence of electrical fires in my country has remained high, causing huge losses to the national economy and people's lives. Relevant data show that more than 80% of electrical fires are caused by higher than the safe voltage or current required by the circuit breaker in the power outlet. The traditional power socket does not have the function of automatic detection of electric energy parameters, and will not automatically cut off the power because the voltage and current provided by the power socket are not enough to meet the requirements of the current electrical equipment. It will not give early warning because the voltage, current and other power parameters of the current electrical equipment in the working state exceed the maximum voltage and current value that the power socket can provide, and report it to the power user in time to prevent the occurrence of electrical fire accidents.

At the same time, thousands of children in our country are electrocuted or burned by touching power sockets every year. The reason is mainly because the jack of the power socket is already powered regardless of whether the electrical equipment is connected to the traditional power socket. In view of the defects and functional deficiencies of traditional power sockets, the majority of power users urgently need a smart power socket with protection function. Patent CN104917002B "A smart power socket based on the Internet of Things" uses RFID radio frequency identification technology to detect whether there is an electrical device connected, and only supply power to the socket when an electrical device is connected to the socket, but this solution requires the RFID identification circuit to always be used. At work, the standby power consumption is large, and the life of the product is shortened due to the long-term operation of the RFID identification circuit and the control circuit.

Fires from existing receptacles often have the following causes:

1. The electrodes on the wires and sockets are not fixed tightly, and the contact is poor, causing heat generation;

2. Overload use of high-power electrical appliances, exceeding the allowable current of the socket, causing heat;

3. The socket is flooded or damp, and the insulation is lowered, causing leakage or even short circuit, causing a fire;

4. The quality of the socket itself is not good, internal damage, causing short circuit, etc.

At present, the existing power sockets on the market only have a simple overheating protection function, and the temperature sensor has a single temperature measurement method (it cannot measure the temperature of all reeds of the power socket well) or is irreversible overheating deformation (or fuse), or the temperature is overheated The protection threshold is not adjustable, and the function is single, which cannot meet the actual needs well.

Therefore, the use of smart power sockets can not only save thousands of lives, but also prevent tens of thousands of fire injuries, in addition to avoiding huge property damage. Smart power sockets can be widely used in homes, offices, factories and many other fields. Globally, hundreds of millions of these smart power sockets are needed. Therefore, smart power sockets have huge market application prospects and social needs.

SUMMARY OF THE INVENTION

In view of the deficiencies in the above-mentioned background technologies, the present invention proposes a smart socket, which solves the technical problems of single function, high power consumption and short life of the existing socket.

The technical scheme of the present invention is realized as follows:

A smart socket includes a live wire input end LIN, a neutral wire input end NIN, a live wire output end LOUT and a neutral wire output end NOUT; the live wire input end LIN is connected with the input end of a magnetic sensitive detection element, and the magnetic sensitive detection element has The output terminal is connected with the coil of the relay K1, and the coil of the relay K1 is connected with the neutral input terminal NIN; the first normally open contact of the relay K1 is connected in series between the live wire input terminal LIN and the live wire output terminal LOUT, and the first normally open contact of the relay K1 is connected in series between the live wire input terminal LIN and the live wire output terminal LOUT. Two normally open contacts are connected in series between the neutral line input end NIN and the neutral line output end NOUT; the live line output end LOUT and the neutral line output end NOUT are both connected to the power plug of the load.

The output end of the magneto-sensitive detection element is connected to the zero line input end NIN through the resistor R1 and the capacitor C1, and the resistor R1 and the capacitor C1 are connected in series with the coil of the relay K1 in parallel.

The neutral line input end NIN is respectively connected to the coil of the capacitor C1 and the relay K1 through the photoelectric coupling device.

An AC-DC power supply module is connected between the output end of the magnetic sensitive detection element and the zero line input end NIN, and the AC-DC power supply module is connected with the microcontroller circuit, and the microcontroller circuit is respectively connected with the temperature detection circuit and the humidity sensor The output terminal SW of the microcontroller circuit is connected with the photoelectric coupling device through the resistor R4.

The temperature detection circuit includes a first temperature sensor RT1 and a second temperature sensor RT2; the B terminal of the first temperature sensor RT1 is connected to the ground terminal, and the A terminal of the first temperature sensor RT1 is connected to the forward direction of the first operational amplifier. The input end is connected, the reverse input end of the first operational amplifier is connected with the output end of the first operational amplifier, and the output end of the first operational amplifier is connected with the analog-to-digital conversion input end ADC1 of the microcontroller circuit; The B terminal of the second temperature sensor RT2 is connected to the ground terminal, the A terminal of the second temperature sensor RT2 is connected to the forward input terminal of the second operational amplifier, and the reverse input terminal of the second operational amplifier is connected to the output of the second operational amplifier. The output end of the second operational amplifier is connected with the analog-to-digital conversion input end ADC2 of the microcontroller circuit.

The first temperature sensor RT1 is connected in parallel with the capacitor C2, and the A terminal of the first temperature sensor RT1 is connected to the positive level through the resistor R2; the second temperature sensor RT2 is connected in parallel with the capacitor C3, and the A terminal of the second temperature sensor RT2 is connected in parallel. It is connected to the positive level via the resistor R3.

The microcontroller circuit is respectively connected with the electric energy metering circuit and the RF communication circuit.

The magnetic sensing element is a reed switch S1, the input end of the reed switch S1 is connected to the live wire input terminal LIN, and the output end of the reed switch S1 is respectively connected to the coil of the relay K1, the resistor R1 and the AC-DC power supply module. connect.

The power plug of the load is equipped with a magnet, and the magnet matches the reed switch S1.

A fuse F1 is connected between the input end of the reed switch S1 and the live wire input end LIN.

The beneficial effects that this technical solution can produce:

1. The present invention adopts the magnetic sensitive detection element, which can detect whether the power plug of the load is inserted into the socket, control the on-off of the power supply, effectively save the electric energy, and improve the reliability of the product;

2. The present invention adopts a temperature sensor, a humidity sensor and a microcontroller circuit to detect the temperature and humidity of the live wire and the zero wire reed of the smart socket in real time, which not only has high measurement accuracy, but also can timely detect whether the socket has water. Or damp, to avoid insulation drop and cause leakage or even short circuit and cause fire;

3. The present invention can display and monitor current electrical information, temperature information, and humidity information in real time by using a mobile terminal to realize over-temperature protection and over-humidity protection, and can also use a mobile terminal to set power and control the timing on and off of the smart socket. ;

4. The present invention has the function of no-load detection, which can effectively avoid the fire hazard caused by overcharging of the equipment or the long-term no-load operation of the power adapter.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a circuit diagram of Embodiment 1 of the present invention;

2 is a circuit diagram of Embodiment 2 of the present invention;

FIG. 3 is a circuit diagram of Embodiment 3 of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment 1, a smart socket, as shown in FIG. 1, includes a live wire input terminal LIN, a neutral wire input terminal NIN, a live wire output terminal LOUT, and a neutral wire output terminal NOUT. The live wire input terminal LIN is connected to the live wire terminal of the power grid, and the zero wire The line input end NIN is connected to the neutral line end of the power grid, and the combination of the live line input end LIN and the neutral line input end NIN is the 220V AC power input end; the live line output end LOUT is connected to the live line metal reed of the smart socket, and the neutral line output end NOUT is connected To the neutral wire metal reed of the smart socket, the live wire output terminal LOUT and the neutral wire output terminal NOUT are combined into a 220V AC power output terminal; the live wire input terminal LIN is connected with the input terminal of the magnetic sensitive detection element, and the magnetic sensitive detection element The output end is connected with the coil of the relay K1, the magnetic sensitive detection element is matched with the magnet on the power plug of the load, the magnetic sensitive detection element is in the normally open state, when the load is connected to the socket, the magnetic sensitive detection element is closed, when the socket When no load is connected to the upper part, the magnetic sensitive detection element is disconnected, which is used to judge whether the load is connected to the socket. The relay K1 adopts the intermediate relay LY2NJ-AC220V of OMRON Company, and the coil of the relay K1 is connected with the neutral input terminal NIN; the relay The first normally open contact of K1 is connected in series between the live wire input terminal LIN and the live wire output terminal LOUT, and the second normally open contact of the relay K1 is connected in series between the neutral wire input terminal NIN and the neutral wire output terminal NOUT. The magnetic sensing element is the reed switch S1, and the reed switch S1 adopts the high-voltage reed switch HA15-2 of Littelfuse Company, which is used to detect whether the power plug of the load is inserted into the smart socket. The input end of the reed switch S1 is connected to the live wire input. The terminals LIN are connected, and a fuse F1 is connected between the input terminal of the reed switch S1 and the input terminal LIN of the live wire, which is used for overcurrent protection of the circuit. The output terminal of the reed switch S1 is input through the resistor R1, the capacitor C1 and the neutral line. The terminal NIN is connected, and the resistor R1 and the capacitor C1 are connected in series with the coil of the relay K1 in parallel. The resistor R1 and the capacitor C1 are used to absorb the self-inductive electromotive force generated at both ends of the coil of the relay K1. The live wire output terminal LOUT and the neutral wire output terminal NOUT are both connected to the power plug of the load, the power plug of the load is equipped with a magnet, and the magnet matches the reed switch S1. When the magnet is close to the reed switch S1, the reed switch S1 is in a closed state under the action of a magnetic field, energizing the smart socket.

When the power plug of the load is not connected to the smart socket, the reed switch S1 is in the normally open state, no current flows through the coil of the relay K1, and the first normally open contact and the second normally open contact of the relay K1 are both disconnected. The live wire output terminal LOUT and the neutral wire output terminal NOUT have no voltage output. Even if a child inserts a metal object into the jack of the smart socket, it is not dangerous to touch the live wire output terminal LOUT or the neutral wire output terminal NOUT, and the smart socket is in standby at this time. Power consumption is zero. When the power plug of the load is connected to the smart socket, the magnet on the power plug is close to the reed switch S1, the reed switch S1 is in a closed state under the action of the magnetic field, the coil of the relay K1 has a current passing through it, and the first constant of the relay K1 Both the open contact and the second normally open contact are closed, and the live wire output terminal LOUT and the neutral wire output terminal NOUT output an AC voltage of 220V. The circuit of the first embodiment is simple, the standby power consumption is zero, the cost is low, and the reliability is high (the number of components is small, and the product failure rate is low).

Embodiment 2, a smart socket, as shown in Figure 2, the neutral line input terminal NIN is connected to the coils of the capacitor C1 and the relay K1 through the photoelectric coupling device U2, and the photoelectric coupling device U2 is the model of MOC3083, which is used for Drive relay K1. The photocoupling device U2 includes a photodiode and a bidirectional thyristor, the photodiode emits light, and the bidirectional thyristor is turned on, thereby realizing the connection between the coil of the relay and the neutral line input end NIN and the live line input end LIN respectively. An AC-DC power supply module M1 is connected between the output end of the reed switch S1 and the neutral line input end NIN, the AC-DC power supply module M1 is connected with the microcontroller circuit M2, and the output voltage of the AC-DC power supply module M1 is 3.3 V supplies power to the microcontroller circuit M2. The microcontroller circuit M2 is connected to the temperature detection circuit and the humidity sensor M3 respectively. The temperature detection circuit is respectively set on the live wire output terminal LOUT and the neutral wire output terminal NOUT, and is used to detect the temperature of the smart socket. The temperature of the metal reed of the live wire output terminal LOUT and the metal reed of the neutral wire output terminal NOUT, the temperature information is sent to the microcontroller circuit M2, the temperature overheating protection threshold is set by the software, the setting range is 40~125 ℃, the default The value is set to 80°C. The humidity sensor M3 is used to measure the humidity inside the smart socket, and send the measurement data to the microcontroller circuit M2. The output end SW of the microcontroller circuit M2 is connected to the optocoupler device U2 through the resistor R4, which is used to limit the microcontroller. The micro-controller circuit M2 is used to control the conduction and disconnection of the photoelectric coupling device U2, thereby driving the relay K1.

The temperature detection circuit includes a first temperature sensor RT1 and a second temperature sensor RT2. Both the first temperature sensor RT1 and the second temperature sensor RT2 use the thin film thermistor 103JT-025 or 104JT-025 of SEMITEC company. Insulating film package, can safely contact the electrode, good insulation, the temperature measurement range can reach -50~125℃, the error is ±1%, the first temperature sensor RT1 and the second temperature sensor RT2 are respectively used to measure the live wire of the smart socket The temperature of the metal reed at the output terminal LOUT and the metal reed at the neutral output terminal NOUT. The B terminal of the first temperature sensor RT1 is connected to the ground terminal, the A terminal of the first temperature sensor RT1 is connected to the forward input terminal of the first operational amplifier, and the reverse input terminal of the first operational amplifier is connected to the first operational amplifier. The output terminal of the amplifier is connected, and the output terminal of the first operational amplifier is connected to the analog-to-digital conversion input terminal ADC1 of the microcontroller circuit M2; the B terminal of the second temperature sensor RT2 is connected to the ground terminal, and the second temperature sensor RT2 is connected to the ground terminal. The A terminal of RT2 is connected to the forward input terminal of the second operational amplifier, the reverse input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier, and the output terminal of the second operational amplifier is connected to the microcontroller circuit M2 The analog-to-digital conversion input ADC2 is connected. Both the first operational amplifier and the second operational amplifier are TLV9002 from TI, which is a low-voltage operational amplifier with a voltage range of [1.8V, 5.5V], with rail-to-rail input and output swing capability. The first temperature sensor RT1 is connected in parallel with a capacitor C2. The capacitor C2 is used to filter out noise signals. The A terminal of the first temperature sensor RT1 is connected to the positive level through a resistor R2. The resistor R2 is a pull-up resistor and divides the voltage in series. Function; the second temperature sensor RT2 is connected in parallel with a capacitor C3, the capacitor C3 is used to filter out noise signals, the A terminal of the second temperature sensor RT2 is connected to the positive level through the resistor R3, and the resistor R3 is a pull-up resistor, which acts as a pull-up resistor. The role of series voltage divider. The first temperature sensor RT1 and the second temperature sensor RT2 measure the temperature of the metal reed of the live wire output terminal LOUT and the metal reed of the neutral wire output terminal NOUT of the smart socket, and convert the change of the temperature value into the change of the resistance value, respectively. After the resistors R2 and R3 are divided in series, they are converted into voltage changes, which are amplified by the first operational amplifier and the second operational amplifier and then sent to the analog-to-digital conversion input terminals ADC1 and ADC2 of the microcontroller circuit M2. The analog-to-digital converter (ADC) converts the analog voltage into digital, and the microcontroller software processes the data to obtain the temperature value.

When the power plug of the load is not connected to the smart socket, the reed switch S1 is in the normally open state, no current flows through the coil of the relay K1, the normally open contact of the relay K1 is disconnected, the live wire output terminal LOUT and the neutral wire output terminal NOUT No voltage output. At this time, the AC-DC power module M1 does not work and there is no output voltage. The microcontroller circuit M1, the temperature detection circuit, and the humidity sensor M3 do not work, and the standby power consumption of the smart socket is zero.

When the power plug of the load is connected to the smart socket, the magnet on the power plug is close to the reed switch S1, and the reed switch S1 is in a closed state under the action of the magnetic field. At this time, the input end of the AC-DC power module M1 receives the AC 220V voltage input , AC-DC power module M1 output voltage 3.3V for microcontroller circuit M2, temperature detection circuit, humidity sensor M3 and other power supply. The first temperature sensor RT1 and the second temperature sensor RT2 measure the temperature of the live wire output terminal LOUT and the neutral wire output terminal NOUT of the smart socket, and convert the change of the temperature value into the change of the resistance value, which is divided by resistors R2 and R3 in series. , converted into a change in voltage, amplified by the first operational amplifier and the second operational amplifier and sent to the analog-to-digital conversion input terminals ADC1 and ADC2 of the microcontroller circuit M2, respectively, and the analog-to-digital converter (ADC) in the microcontroller circuit. The analog voltage is converted into digital, and the temperature value is obtained after the data is processed by the microcontroller software. The humidity sensor module M3 is used to measure the humidity inside the smart socket and send the measured data to the microprocessor circuit. When the microcontroller circuit M2 judges that the temperature of the metal reed of the live wire output terminal LOUT and the metal reed of the neutral wire output terminal NOUT of the smart socket is lower than the set threshold value and the humidity inside the socket is lower than the set threshold value, the microcontroller is controlled by the microcontroller. The SW port of the circuit M2 outputs a low-level power-on signal, so that the photocoupler U2 is turned on, a current flows through the coil of the relay K1, the first normally open contact and the second normally open contact of the relay K1 are closed, and the live wire The output terminal LOUT and the neutral line output terminal NOUT output an AC voltage of 220V. When the microprocessor circuit M2 judges that the temperature of the live wire output terminal LOUT and the neutral wire output terminal NOUT of the smart socket is higher than the set threshold or the humidity inside the socket is higher than the set threshold, the SW port of the microcontroller circuit M2 outputs a high voltage Shutdown signal, the photocoupler U2 is turned off, the coil current loop of the relay K1 is cut off, the first normally open contact and the second normally open contact of the relay K1 are disconnected, the live wire output terminal LOUT and the neutral wire output terminal NOUT have no AC voltage output to avoid fire.

The other structures of this embodiment are the same as those of the first embodiment.

Embodiment 3, a smart socket, as shown in FIG. 3 , the microcontroller circuit M2 is connected to the power metering circuit M4 and the RF communication circuit M5 respectively. The RF communication circuit M5 is connected to the mobile terminal. The electric energy metering circuit M4 is used to measure the output voltage, load current, power consumed by the load, power factor and other parameters of the smart socket. These electrical parameters are sent to the microcontroller circuit M2, and the software inside the microcontroller circuit M2 can be used according to these electrical parameters. Judging the working state of the load, when the load is in standby (for example, the charging of the mobile phone is completed), the smart socket can automatically power off (the SW port outputs a high level), so as to prevent the mobile phone from being overcharged or the charger working for a long time to cause a fire.

The RF communication circuit can choose a WIFI module and a Bluetooth module, and the smart socket can communicate with the mobile phone or access the wireless Internet through the RF communication circuit. Using a mobile phone or computer, you can set the working time period of the smart socket, the overheat protection threshold, humidity protection threshold, load standby threshold and other parameters of the smart socket. You can also use the mobile phone or computer to monitor the working status of the smart socket, such as the power of the load and the output of the socket. voltage, load current, power factor of the load, reed temperature, humidity inside the socket. According to the above parameters measured, the user's electricity consumption habits can be counted, such as the relationship between the power consumption and time, the load parameters in a fixed time period, the time period when the load is in the standby state, and after a period of data accumulation, the smart socket can better understand the user. , which can further automatically cut off the power during the non-effective power consumption period of the user.

Other structures of this embodiment are the same as those of Embodiment 1 and Embodiment 2.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (5)

1. An intelligent socket comprises a live wire input end LIN, a zero line input end NIN, a live wire output end LOUT and a zero line output end NOUT; the device is characterized in that the live wire input end LIN is connected with the input end of a magnetic-sensing detection element, the output end of the magnetic-sensing detection element is connected with a coil of a relay K1, and the coil of the relay K1 is connected with the zero line input end NIN; a first normally open contact of the relay K1 is connected in series between a live wire input end LIN and a live wire output end LOUT, and a second normally open contact of the relay K1 is connected in series between a zero line input end NIN and a zero line output end NOUT; the live wire output end LOUT and the zero line output end NOUT are connected with a power plug of a load;

an AC-DC power supply module (M1) is connected between the output end of the magnetic-sensing detection element and the input end NIN of the zero line, the AC-DC power supply module (M1) is connected with a microcontroller circuit (M2), the microcontroller circuit (M2) is respectively connected with a temperature detection circuit and a humidity sensor (M3), and the output end SW of the microcontroller circuit (M2) is connected with a photoelectric coupler (U2) through a resistor R4;

the temperature detection circuits are respectively arranged on the live wire output end LOUT and the zero line output end NOUT; the temperature detection circuit comprises a first temperature sensor RT1 and a second temperature sensor RT 2; the first temperature sensor RT1 and the second temperature sensor RT2 are both film-type thermistors; the B end of the first temperature sensor RTI is connected with the ground end, the A end of the first temperature sensor RT1 is connected with the positive input end of a first operational amplifier, the reverse input end of the first operational amplifier is connected with the output end of the first operational amplifier, and the output end of the first operational amplifier is connected with the analog-to-digital conversion input end ADC1 of the microcontroller circuit (M2); the B end of the second temperature sensor RT2 is connected with a grounding end, the A end of the second temperature sensor RT2 is connected with the positive input end of a second operational amplifier, the reverse input end of the second operational amplifier is connected with the output end of the second operational amplifier, the output end of the second operational amplifier is connected with the analog-to-digital conversion input end ADC2 of a microcontroller circuit (M2), and the first temperature sensor RT1 and the second temperature sensor RT2 are respectively used for measuring the temperature of a metal reed of a live wire output end LOUT and a metal reed of a zero wire output end NOUT of the intelligent socket;

the microcontroller circuit (M2) is respectively connected with the electric energy metering circuit (M4) and the RF communication circuit (M5);

the output end of the magnetic-sensing detection element is connected with the zero line input end NIN through a resistor R1 capacitor C1, and the resistor R1 is connected with the capacitor C1 in series and then connected with the coil of the relay K1 in parallel;

the NIN input end of the zero line is respectively connected with a line graph of a capacitor C1 and a relay K1 through a photoelectric coupler (U2);

when a power plug is connected with an intelligent socket, a magnetic-sensing detection element is conducted, the temperature of a metal reed of a live wire output end LOUT and a metal reed of a zero line output end NOUT of the intelligent socket is measured by the first temperature sensor RT1 and the second temperature sensor RT2, the change of the temperature value is converted into a change value of resistance, when a microcontroller circuit (M2) judges that the temperature of the metal reed of the live wire output end LOUT and the temperature of the metal reed of the zero line output end NOUT of the intelligent socket are lower than a set threshold value and the internal humidity of the socket is lower than the set threshold value, a SW port of the microcontroller circuit (M2) outputs a low-level starting signal to enable a photoelectric coupling device (U2) to be conducted, current flows through a coil of a relay K1, a first normally open contact and a second normally open contact of a relay K1 are attracted, and when the microcontroller circuit (M2) judges that the temperature of the metal reed of the live wire output end LOUT and the metal reed of the zero line output end NOUT of the intelligent socket is higher than the set threshold value or the internal humidity of the socket When the temperature is higher than the set threshold value, a coil current loop of the relay K1 is cut off, and no alternating voltage is output from the live wire output end LOUT and the zero wire output end NOUT.

2. The smart jack of claim 1, wherein a capacitor C2 is connected in parallel to the first temperature sensor RTI, and the terminal a of the first temperature sensor RT1 is connected to a positive level via a resistor R2; the second temperature sensor RT2 is connected with a capacitor C3 in parallel, and the A end of the second temperature sensor RT2 is connected with the positive level through a resistor R3.

3. The smart socket according to claim 1, wherein the magnetic sensing detection element is a reed switch S1, the input end of the reed switch S1 is connected with the live input end LIN, and the output end of the reed switch S1 is respectively connected with the coil of a relay K1, a resistor R1 and an AC-DC power module (M1).

4. The smart jack of claim 1, wherein a magnet is mounted on the power plug of the load, the magnet matching the reed switch S1.

5. The smart jack of claim 4, wherein a fuse F1 is connected between the input of the reed switch S1 and the live input LIN.

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