CN215871190U - Power supply control circuit and socket - Google Patents
Power supply control circuit and socket Download PDFInfo
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- CN215871190U CN215871190U CN202120942968.1U CN202120942968U CN215871190U CN 215871190 U CN215871190 U CN 215871190U CN 202120942968 U CN202120942968 U CN 202120942968U CN 215871190 U CN215871190 U CN 215871190U
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Abstract
The application discloses a power supply control circuit and a socket, the power supply control circuit comprises a first detection module, a second detection module, a switch module and a controller, the first detection module is connected with the controller, the first detection module is used for sending out detection waves and receiving reflection waves of the detection waves, to output a first judgment signal to the controller based on the received reflected wave, a second detection module connected with the controller for detecting a temperature corresponding to the heat radiation of the human body, the second judgment signal is output to the controller based on the temperature, the switch module is respectively connected with the controller, the input power supply and the power supply, the switch module is used for switching on or off based on the control signal output by the controller so as to control the connection state between the input power supply and the power supply, wherein the control signal is obtained by the controller based on the first determination signal and the second determination signal. Through the mode, the personal safety can be well protected in the process of using the socket.
Description
Technical Field
The present application relates to the field of electronic circuit technology, and more particularly, to a power control circuit and a socket.
Background
The socket is an indispensable electric connecting device in modern production and life. Most of the existing sockets are directly connected with an electrode contact in the socket and a power line, and when the socket is used, the purpose of connecting a power supply is achieved by directly contacting the electrode contact with a plug of an electric appliance. The socket has the advantages that the electrode contact pieces are always electrified, so that the plug is easily directly or indirectly touched by hands in the process of being pulled out or inserted, and electric shock accidents are caused.
In the prior art, a common method is to provide a push mechanical transmission switch on a socket, so that after a plug is plugged into the socket, the internal contact of the switch can be closed, thereby preventing a non-plug from being plugged into the socket or other metal objects from being mistakenly plugged into the socket to cause electric shock. However, the method still has the risk of electric shock to the human body, for example, when the plug has a skin-breaking or electric leakage condition, the human body still easily gets electric shock, and the safety is low.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application aims at providing a power supply control circuit and a socket, and the application can better protect personal safety in the process of using the socket.
To achieve the above object, in a first aspect, the present application provides a power control circuit comprising:
the device comprises a first detection module, a second detection module, a switch module and a controller;
the first detection module is connected with the controller, and is used for sending out detection waves and receiving reflected waves of the detection waves so as to output a first judgment signal to the controller based on the received reflected waves;
the second detection module is connected with the controller and is used for detecting the temperature corresponding to the heat radiation of the human body so as to output a second judgment signal to the controller based on the temperature;
the switch module is connected to the controller, the input power supply and the power supply, and the switch module is configured to be turned on or off based on a control signal output by the controller to control a connection state between the input power supply and the power supply, wherein the control signal is obtained by the controller based on the first determination signal and the second determination signal.
In an optional manner, the first detection module includes an oscillation unit and a signal processing unit;
the oscillation unit is used for generating and transmitting a detection wave with a preset oscillation frequency and receiving a reflected wave of the detection wave;
the signal processing unit is respectively connected with the oscillating unit and the controller, and is used for processing the reflected wave and then outputting a first judgment signal to the controller.
In an optional mode, the oscillation unit includes a first switch tube, a first capacitor, a second capacitor, and an antenna;
the control end of the first switch tube is connected with the first end of the first capacitor and the first end of the second capacitor, the first end of the first switch tube is connected with the second end of the first capacitor and the first end of the antenna, the second end of the first switch tube is connected with the second end of the second capacitor, and the second end of the antenna is connected with the signal processing unit;
the first switch tube, the first capacitor and the second capacitor are used for generating the preset oscillation frequency, and the antenna is used for transmitting the detection wave and receiving the reflected wave.
In an alternative mode, the signal processing unit includes a pyroelectric sensor;
a first amplification signal input pin of the pyroelectric sensor is connected with the oscillation unit, and a signal output pin of the pyroelectric sensor is connected with the controller;
the pyroelectric sensor is used for processing the reflected wave and then outputting a first judgment signal to the controller.
In an optional manner, the second detection module includes a temperature detection unit and a signal amplification unit;
the temperature detection unit is connected with the signal amplification unit and is used for detecting the temperature and outputting a thermoelectric signal to the signal amplification unit based on the temperature;
the signal amplification unit is connected with the controller and is used for amplifying the thermoelectric signal so as to output the second judgment signal to the controller.
In an alternative form, the temperature detection unit includes a thermopile sensor;
the temperature sensor pin of the thermopile sensor is connected with the controller, the grounding pin of the thermopile sensor is grounded, and the positive voltage output pin and the negative voltage output pin of the thermopile sensor are both connected with the signal amplification unit.
In an alternative mode, the signal amplification unit includes an operational amplifier;
the non-inverting input end and the inverting input end of the operational amplifier are both connected to the temperature detection unit, and the output end of the operational amplifier is connected with the controller.
In an optional mode, the switch module comprises a second switch tube and a relay;
the control end of second switch tube with the controller is connected, the first end ground connection of second switch tube, the second end of second switch tube with the first end of the coil of relay is connected, the second end and the first power of the coil of relay are connected, the both ends of a set of normally open contact of relay respectively with input power supply and power supply connects.
In an optional manner, the power control circuit further includes a power module;
the power supply module is respectively connected with the input power supply and each module in the power supply control circuit, and the power supply module is used for converting the input power supply so as to provide power supply voltage for each module in the power supply control circuit based on the input power supply.
In a second aspect, the present application provides an electrical outlet comprising an electrical power supply and a power control circuit as described above;
the power supply control circuit is respectively connected with the input power supply and the power supply, and is used for controlling the connection state between the input power supply and the power supply.
The beneficial effects of the embodiment of the application are that: the power supply circuit comprises a first detection module, a second detection module, a switch module and a controller, wherein the first detection module is used for sending out detection waves and receiving reflection waves of the detection waves to output a first judgment signal to the controller based on the received reflection waves, the second detection module is used for detecting the temperature corresponding to the heat radiation of a human body to output a second judgment signal to the controller based on the temperature, and the switch module is used for switching on or off based on a control signal output by the controller to control the connection state between an input power supply and a power supply, wherein the control signal is obtained by the controller based on the first judgment signal and the second judgment signal, so that whether an object approaches can be judged by the first detection module, and whether the object approaches is judged by further combining with the temperature detection of the second detection module, so that whether the human body approaches can be accurately judged, and when the human body is close to, the switch module is disconnected to play a protective role, so that when the power supply circuit is applied to the socket, the input power supply and the power supply can be disconnected in the process of plugging and unplugging the socket by a user, the human body is ensured not to have electric shock risk, and the better personal safety protection in the process of using the socket is realized.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a socket according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a power control circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a power control circuit according to another embodiment of the present disclosure;
fig. 4 is a schematic circuit structure diagram of a first detection module according to an embodiment of the present disclosure;
fig. 5 is a schematic circuit structure diagram of a second detection module according to an embodiment of the present disclosure;
fig. 6 is a schematic circuit structure diagram of a switch module and a power module according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a socket according to an embodiment of the present disclosure. As shown in fig. 1, the socket 1000 includes a power control circuit 100 and a power supply 110. The power supply 110 is a power supply for supplying power to an external device on the socket 1000, for example, when a plug of the electric fan is plugged into the socket 1000, the power supply 110 provides a voltage required by the electric fan. The power control circuit 100 is connected to the input power 200 and the power supply 110, i.e. the power control circuit 100 is disposed between the input power 200 and the power supply 110.
Specifically, the power supply control circuit 100 can control the connection state between the input power supply 200 and the power supply 110, and the connection state between the input power supply 200 and the power supply 110 includes a connected state and a disconnected state. When the power control circuit 100 controls the connection state between the input power 200 and the power supply 110 to be a connection state, the voltage of the power supply 110 is the voltage of the input power, and when the external device is connected to the socket, the external device can obtain a working voltage to support the external device to normally work. When the power control circuit 100 controls the connection state between the input power 200 and the power supply 110 to be the disconnection state, the voltage on the power supply 110 is 0, and even if the external device is connected with the socket, the socket cannot work, that is, in this case, when the user touches metal in the socket or touches a leakage part on the socket, and the like, the human body does not have the risk of electric shock, so that the user can better protect the personal safety of the user in the process of using the socket.
Referring to fig. 2, the power control circuit 100 includes a first detection module 10, a second detection module 20, a switch module 30 and a controller 40. The first detection module 10 is connected to the controller 40, the second detection module 20 is connected to the controller 40, and the switch module 30 is connected to the controller 40, the input power source 200, and the power supply 110.
Specifically, the first detection module 10 is configured to emit a detection wave and receive a reflected wave of the detection wave, so as to output a first determination signal to the controller 40 based on the received reflected wave. When the detection wave emitted by the first detection module 10 hits an obstacle, a reflected wave occurs, and the intensity of the reflected wave is different according to the distance between the obstacle and the first detection module 10, and normally, the intensity of the reflected wave is attenuated according to the increase of the distance in the propagation process. The first detection module 10 can detect the distance between the obstacle and itself by detecting the intensity of the received reflected wave, and can output a first determination signal to the controller 40 based on the intensity of the received reflected wave. For example, when the intensity of the reflected wave is greater than the predetermined intensity, the first determination signal may be outputted to inform the controller 40 that an object is approaching, otherwise, the first determination signal may be outputted to inform the controller 40 that no object is approaching. Then, when the first detection module 10 is applied to a socket, the socket can know whether an object is near the socket, for example, when a user inserts or removes a plug from the socket by hand, the socket can know that an object is near the socket.
In the present embodiment, the detection wave or the transmission wave may be an electromagnetic wave or an acoustic wave. When the detection wave or the transmission wave is an electromagnetic wave, the device that transmits or receives the electromagnetic wave may be an antenna or the like, and when the detection wave or the transmission wave is an acoustic wave, the device that transmits or receives the acoustic wave may be an ultrasonic sensor or the like.
In an embodiment, please refer to fig. 3 in combination with fig. 2, and fig. 3 is a schematic structural diagram of a power control circuit according to another embodiment of the present disclosure. As shown in fig. 3, the first detecting module 10 includes an oscillating unit 11 and a signal processing unit 12. The signal processing unit 12 is connected to the oscillation unit 11 and the controller 40, respectively.
Specifically, the oscillation unit 11 is configured to generate and transmit a detection wave with a preset oscillation frequency, and receive a reflection wave of the detection wave, where the preset oscillation frequency is a frequency of the transmission detection wave, and the oscillation frequency is a physical quantity used for describing how fast the object vibrates, and is used for determining a clock period of the first detection module 10.
The signal processing unit 12 is configured to process the reflected wave and output a first determination signal to the controller. Since the reflected wave is attenuated during the transmission process, the received reflected wave needs to be processed to output a more accurate first determination signal.
In one embodiment, the oscillation unit includes a first switch tube, a first capacitor, a second capacitor, and an antenna. The circuit configuration of the first detection module shown in fig. 4 will be described as an example. As shown in fig. 4, the first switch tube, the first capacitor, the second capacitor and the antenna respectively correspond to the transistor Q1, the first capacitor C1, the second capacitor C2 and the antenna ANT.
The base of the triode Q1 is connected to the first end of the first capacitor C1 and the first end of the second capacitor C2, the emitter of the triode Q1 is connected to the second end of the first capacitor C1 and the first end of the antenna ANT, the collector of the triode Q1 is connected to the second end of the second capacitor C2, and the second end of the antenna ANT is connected to the signal processing unit 12, wherein the triode Q1, the first capacitor C1 and the second capacitor C2 are used for generating a preset oscillation frequency, and the antenna ANT is used for emitting a detection wave and receiving a reflected wave.
It should be understood that the first switch tube can be one of a triode, a MOS tube or an IGBT switch tube.
Taking the example that the first switch tube is selected from a triode, at this time, the base of the triode is the control end of the first switch tube, the emitter of the triode is the first end of the first switch tube, and the collector of the triode is the second end of the first switch tube.
Taking the example that the first switch tube is an MOS tube, at this time, the gate of the MOS tube is the control end of the second switch tube, the source of the MOS tube is the first end of the second switch tube, and the drain of the MOS tube is the second end of the second switch tube.
Taking the example that the first switch tube is an IGBT switch tube, at this time, the gate of the IGBT switch tube is the control end of the second switch tube, the emitter of the IGBT switch tube is the first end of the second switch tube, and the collector of the IGBT switch tube is the second end of the second switch tube.
In one embodiment, the signal processing unit 12 includes a pyroelectric sensor U1, a first amplified signal input pin of the pyroelectric sensor U1 is connected with the oscillation unit 11, a signal output pin of the pyroelectric sensor U1 is connected with the controller, and a first amplified signal output pin of the pyroelectric sensor U1 is connected with a second amplified signal input pin of the pyroelectric sensor U1.
It is understood that in the present embodiment, a pyroelectric sensor with a type BISS0001 is taken as an example, and the pyroelectric sensor with a type BISS0001 is a pyroelectric human body sensing chip. The first amplification signal input pin of the pyroelectric sensor U1 is the 14 th pin of the pyroelectric sensor U1, the signal output pin of the pyroelectric sensor U1 is the 2 nd pin of the pyroelectric sensor U1, the first amplification signal output pin of the pyroelectric sensor U1 is the 16 th pin of the pyroelectric sensor U1, and the second amplification signal input pin of the pyroelectric sensor U1 is the 13 th pin of the pyroelectric sensor U1. In other embodiments, the pyroelectric sensor is of different types, so that when other types of pyroelectric sensors are used, the specific pin definition may be different, but the function and signal definition are the same. Other types of pyroelectric sensors may be used, and they may be arranged in a similar manner to the above-described embodiments, which are within the scope easily understood by those skilled in the art and will not be described herein.
In practical applications, first, the oscillating unit 11 can generate a preset oscillating frequency by the above structure. Then, the antenna emits a detection wave, which is a forward-propagating beam, according to a preset oscillation frequency. Then, when the human body moves in the range of the propagation of the detection wave, the electromagnetic wave as the detection will be reflected along various directions after hitting the human body, causing a spectrum change, and a part of the electromagnetic energy is reflected back to the direction of the antenna and is acquired by the antenna, at this time, the electromagnetic wave is the reflected wave received by the antenna. Then, the reflected wave passes through the fifth resistor R5 and is input to the 14 th pin of the pyroelectric sensor U1, and the reflected wave signal is amplified by the first operational amplifier provided inside the pyroelectric sensor U1. The amplified signal is output through a 16 th pin of the pyroelectric sensor U1, coupled to a 13 th pin of the pyroelectric sensor U1, and secondarily amplified by a second operational amplifier disposed inside the pyroelectric sensor U1, and the dc potential is raised to VM (about 0.5 times the voltage of the second power supply V2). And finally, detecting an effective trigger signal by a bidirectional amplitude discriminator of the processed voltage, wherein the bidirectional amplitude discriminator consists of two comparators in the pyroelectric sensor U1, the effective trigger signal is a first judgment signal after passing through an internal state delay controller of the pyroelectric sensor U1, and the first judgment signal is output from a No. 2 pin of the pyroelectric sensor U1. And the 2 nd pin of the pyroelectric sensor U1 is connected to the controller through the signal output terminal S1, then the first determination signal is transmitted to the controller from the signal output terminal S1, so that the controller can know whether there is an object or a person approaching at this time.
The second power source V2 may be a power source provided on the power control circuit, or an external independent power source, which is not limited herein.
Referring to fig. 2 again, the second detecting module 20 is configured to detect a temperature corresponding to the thermal radiation of the human body, and output a second determination signal to the controller based on the temperature corresponding to the thermal radiation of the human body. It should be understood that the temperature corresponding to the heat radiation of the human body means that when the human body is in the range capable of being detected by the second detection module 20, the second detection module 20 senses the heat radiation of the human body to obtain the corresponding temperature. When the object approaches the second detection module 20, since the object itself does not have thermal radiation, the temperature data detected by the second detection module 20 at this time does not change greatly. And when the human body is close to the second detection module 20, since the human body itself has thermal radiation (i.e., human body infrared radiation) output, then the second detection module 20 can sense the thermal radiation, thereby determining that there is a human body close.
It can be seen that, while the first detection module 10 can detect that a human body or an object is approaching, on one hand, the second detection module 20 determines again whether a human body or an object is approaching through the temperature, and on the other hand, the second detection module 20 further determines whether a human body is approaching through the temperature. Therefore, through the cooperation of the first detection module 10 and the second detection module 20, whether the human body is approaching or touching the power control circuit can be accurately judged. When the power control circuit is applied to a socket, the first detection module 10 and the second detection module 20 are used in cooperation, so that whether a user contacts the socket or not can be accurately obtained, for example, the user plugs or unplugs the plug on the socket. Therefore, when the user is confirmed to be in contact with the socket, corresponding measures can be taken in time to prevent the user from getting an electric shock, for example, the input power supply of the socket is disconnected, and if only an object is close to or in contact with the socket, misoperation of the socket caused by the situation can be avoided.
In an embodiment, referring to fig. 3 in combination with fig. 2, as shown in fig. 3, the second detection module 20 includes a temperature detection unit 21 and a signal amplification unit 22. The temperature detecting unit 21 is connected to the signal amplifying unit 22, and the signal amplifying unit 23 is connected to the controller 40, that is, the signal amplifying unit 23 is connected to the temperature detecting unit 21 and the controller 40, respectively.
Specifically, the temperature detection unit 21 is configured to detect a temperature corresponding to heat radiation of the human body, and output a thermoelectric signal to the signal amplification unit 22 based on the temperature corresponding to the heat radiation of the human body. That is, when the temperature of the human body where the temperature detection unit 21 is located changes according to the heat radiation, the temperature detection unit 21 can send the thermoelectric signal to the signal amplification unit 22 according to the actual temperature. For example, when a user approaches the temperature detection unit 21, the heat generated by the body of the user inevitably causes a temperature change corresponding to the heat radiation of the human body where the temperature detection unit 21 is located, so that the temperature detection unit 21 can output a corresponding thermoelectric signal to the signal amplification unit 22 according to the change value.
The signal amplifying unit 22 is configured to amplify the thermoelectric signal to output a second determination signal to the controller. The signal amplification unit 22 amplifies the thermoelectric signal after receiving the thermoelectric signal to ensure that the controller can recognize the thermoelectric signal, thereby improving the accuracy of detection.
In one embodiment, a circuit configuration of the second detection block shown in fig. 5 will be described as an example. As shown in fig. 5, the temperature sensing unit 21 includes a thermopile sensor U2, and the thermopile sensor U2 is a pyroelectric infrared ray sensor, which is a device composed of a thermocouple, and a sensor operating based on a pyroelectric effect, which is capable of directly sensing heat radiation, thereby enabling non-contact temperature measurement.
The thermopile sensor U2 includes a positive voltage output pin V + (pin 1), a temperature sensor pin NTC (pin 2), a negative voltage output pin V- (pin 3), and a ground pin GND (pin 4).
Optionally, the signal amplification unit 22 includes an operational amplifier U3. The non-inverting input terminal and the inverting input terminal of the operational amplifier U3 are both connected to the temperature detecting unit 21, and the output terminal of the operational amplifier U3 is connected to the controller through the signal output terminal S2.
In practical application, the 2 nd pin of the thermopile sensor U2 is connected to the controller through the signal output end R _ PT, the 4 th pin of the thermopile sensor U2 is grounded, then the voltage division of the second power supply V2 is performed by the internal thermistor between the 2 nd pin and the 4 th pin of the thermopile sensor U2 and the sixteenth resistor R16, and the cold junction temperature of the thermopile sensor U2 can be acquired by the controller through collecting the voltage division of the internal thermistor between the 2 nd pin and the 4 th pin of the thermopile sensor U2. Wherein, the cold end temperature of the thermopile sensor U2 only indicates the temperature at which the thermopile sensor U2 is located, and the temperature does not include the temperature of the human body heat radiation, and the temperature is used for compensating the measured result to obtain the detected human body temperature.
The No. 1 and No. 3 pins of the thermopile sensor U2 transmit the detected thermoelectric signals including the temperature of the human body's heat radiation and the cold side temperature in the above embodiment to the input of the operational amplifier U3. The operational amplifier U3 amplifies the thermoelectric signal and outputs the amplified thermoelectric signal to the controller, the thermoelectric signal output by the operational amplifier U3 is a second determination signal, the second determination signal is output to the controller through the signal output end S2, and the controller converts the second control signal and the received cold junction temperature to obtain an absolute temperature value of the human body, so that whether the human body approaches the thermoelectric signal can be accurately determined.
Referring to fig. 2 again, the switch module 30 is configured to switch on or off based on a control signal output by the controller 40 to control a connection state between the input power source 200 and the power supply 110, wherein the control signal is obtained by the controller based on the first determination signal and the second determination signal.
Specifically, the connection state between the input power source 200 and the power supply 110 includes a connection state and a disconnection state, when the switch module 30 is turned on according to the control signal of the controller 40, the connection state between the input power source 200 and the power supply 110 is the connection state, and the voltage between the input power source 200 and the power supply 110 is the same. When the switching module 30 is turned off according to the control signal of the controller 40, the state between the input power 200 and the power supply 110 is an off state, i.e., there is no voltage on the power supply 110.
In one embodiment, the switch module includes a second switch tube and a relay. Referring to fig. 6, a circuit structure of the switch module 30 shown in fig. 6 is taken as an example for explanation. The second switch tube corresponds to the triode Q2, and the relay corresponds to the relay KA.
Specifically, the base of the triode Q2 is connected with the controller, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected with the first end of the coil L1 of the relay KA, the second end of the coil L1 of the relay KA is connected with the first power source V1, and two ends of a set of normally open contacts K1 of the relay KA are respectively connected with the input power source 200 and the power supply 100. The group of normally open contacts K1 of the relay KA comprises two pairs of normally open contacts, wherein a first contact of the first pair of normally open contacts is connected with the live wire L1 of the input power supply 200, and a second contact of the first pair of normally open contacts is connected with the live wire L2 of the power supply 110; the first of the second pair of normally open contacts is connected to the neutral line N1 of the input power source 200 and the second contact is connected to the neutral line N2 of the power supply 110.
In practical applications, if a control signal output by the controller is input to the base of the transistor Q2 through the signal port S3, the transistor Q2 can be controlled to be turned on, and then a loop is formed among the first power source V1, the coil L1 of the relay KA, the emitter and collector of the transistor Q2, and the ground, so that the coil L1 of the relay KA is powered on, the normally open contacts K1 of the relay KA are closed, the live line L1 of the input power source 200 is connected with the live line L2 of the power supply 110, and meanwhile, the neutral line N1 of the input power source 200 is connected with the neutral line N2 of the power supply 110.
On the contrary, when the control signal output by the controller is used for controlling the transistor Q2 to be switched off, the coil L1 of the relay KA loses power, the group of normally open contacts K1 of the relay KA is switched off, the connection between the input power source 200 and the power supply 110 is switched off, and the voltage on the power supply 110 is 0.
It is understood that in the present embodiment, the relay is one of electromagnetic low-voltage devices, in other words, in other embodiments, other types of electromagnetic low-voltage devices, such as a contactor, may also be adopted, and the specific implementation manner is similar to that of the above embodiments, which is within the scope easily understood by those skilled in the art, and is not described herein again.
Meanwhile, the practical application of the second switch tube is similar to that of the first switch tube, which is within the scope easily understood by those skilled in the art, and is not described herein again.
In summary, in the power control circuit, the first detection module 10 can detect whether a person or an object is approaching, and the second detection module 20 can detect whether a person or an object is approaching, and can also detect specifically whether a person or an object is approaching. Therefore, the controller can accurately determine whether the human body approaches according to the first determination signal output by the first detection module 10 and the second determination signal output by the second detection module 20.
Furthermore, when the power control circuit is applied to a socket, the switch module 30 is turned off only when the first determination signal determines that a person or an object is close to or contacts the socket and the second determination signal determines that a person is close to or contacts the socket, that is, the connection between the input power 200 and the power supply 110 is cut off, so that the personal safety of a user is well protected in the process of using the socket.
Further, if the first determination signal determines that a person or an object approaches or contacts the socket first and then determines that no person or object approaches or contacts the socket, the connection between the input power source 200 and the power supply 110 also needs to be disconnected as long as the second determination signal keeps determining that a person approaches or contacts the socket. In this case, if the human hand is always at the socket and the body is not moving, which may be due to the user's intention or other diseases, the connection between the input power 200 and the power supply 110 is also disconnected to prevent accidents and further protect the personal safety.
Meanwhile, the socket can accurately detect whether a human body is close to or contacts the socket, so that the situation that when a user holds an object to be placed at the socket and stays at the socket, the socket is misjudged to disconnect the input power supply 200 and the power supply 110, and the electric appliance connected to the socket cannot work is avoided.
Moreover, even when the socket leaks electricity due to aging or damage at the position where the socket body is held by the user, the socket is uncharged as long as the socket detects that a human body is close to or contacts the socket, namely the socket disconnects the input power supply 200 and the power supply 110, and the human body cannot get an electric shock due to the electricity leakage of the socket, so that the personal safety is further protected.
Optionally, referring to fig. 3 again, the power control circuit 100 further includes a power module 50. The power module 50 is connected to the input power 200 and each module in the power control circuit 100, that is, the power module 50 is connected to the input power 200, the first detection module 10, the second detection module 20, the switch module 30 and the controller 40, and the power module 50 is further connected to the oscillation unit 11, the signal processing unit 12, the temperature detection unit 21 and the signal amplification unit 22.
Specifically, the power module 50 is used to convert the input power 200 into a voltage required by each module in the power control circuit 100, for example, if the normal operating voltage of the controller 40 is 3.3V, 220V of the input power 200 needs to be converted into 3.3V to provide the power supply voltage for the controller 40.
Referring to fig. 6, the power module 50 includes a voltage conversion unit U4 and a voltage regulation unit U5, wherein an input terminal of the voltage conversion unit U4 is connected to a live line L1 and a zero point N1 of the input power 200, and an output terminal of the voltage conversion unit U4 outputs a first power V1, that is, the voltage conversion unit U4 can convert 220V of the input power 200 into the first power V1, and the first power V1 is usually 12V. The input terminal VIN of the voltage regulation unit U5 inputs the first power V1 and converts the first power V1 into the second power V2, the second power V2 is typically 3.3V. Thus, the first power source V1 and the second power source V2 can provide an operating voltage for each module in the power control circuit 100, for example, the operating voltage inputted by the coil L1 of the relay KA shown in fig. 6 is the first power source V1.
It should be noted that the hardware configuration of the power control circuit 100 as shown in fig. 2 or fig. 3 is only one example, and that the power control circuit 100 may have more or less components than those shown in the figures, may combine two or more components, or may have a different configuration of components, and that the various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits. For example, the power control circuit 100 further includes an analog-to-digital conversion unit, which is configured to directly obtain a signal that can be recognized by the controller 40 after performing module conversion on the second determination signal. Of course, the adc may also be integrated into the controller 40 as in the present embodiment, and the controller 40 needs to perform analog-to-digital conversion therein for identification after receiving the second determination signal.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; within the context of the present application, where technical features in the above embodiments or in different embodiments can also be combined, the steps can be implemented in any order and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A power control circuit, comprising:
the device comprises a first detection module, a second detection module, a switch module and a controller;
the first detection module is connected with the controller, and is used for sending out detection waves and receiving reflected waves of the detection waves so as to output a first judgment signal to the controller based on the received reflected waves;
the second detection module is connected with the controller and is used for detecting the temperature corresponding to the heat radiation of the human body so as to output a second judgment signal to the controller based on the temperature;
the switch module is connected to the controller, the input power supply and the power supply, and the switch module is configured to be turned on or off based on a control signal output by the controller to control a connection state between the input power supply and the power supply, wherein the control signal is obtained by the controller based on the first determination signal and the second determination signal.
2. The power control circuit of claim 1,
the first detection module comprises an oscillation unit and a signal processing unit;
the oscillation unit is used for generating and transmitting a detection wave with a preset oscillation frequency and receiving a reflected wave of the detection wave;
the signal processing unit is respectively connected with the oscillating unit and the controller, and is used for processing the reflected wave and then outputting a first judgment signal to the controller.
3. The power control circuit of claim 2,
the oscillation unit comprises a first switch tube, a first capacitor, a second capacitor and an antenna;
the control end of the first switch tube is connected with the first end of the first capacitor and the first end of the second capacitor, the first end of the first switch tube is connected with the second end of the first capacitor and the first end of the antenna, the second end of the first switch tube is connected with the second end of the second capacitor, and the second end of the antenna is connected with the signal processing unit;
the first switch tube, the first capacitor and the second capacitor are used for generating the preset oscillation frequency, and the antenna is used for transmitting the detection wave and receiving the reflected wave.
4. The power control circuit of claim 2,
the signal processing unit comprises a pyroelectric sensor;
and a first amplification signal input pin of the pyroelectric sensor is connected with the oscillation unit, and a signal output pin of the pyroelectric sensor is connected with the controller.
5. The power control circuit of claim 1,
the second detection module comprises a temperature detection unit and a signal amplification unit;
the temperature detection unit is connected with the signal amplification unit and is used for detecting the temperature and outputting a thermoelectric signal to the signal amplification unit based on the temperature;
the signal amplification unit is connected with the controller and is used for amplifying the thermoelectric signal so as to output the second judgment signal to the controller.
6. The power control circuit of claim 5,
the temperature detection unit comprises a thermopile sensor;
the temperature sensor pin of the thermopile sensor is connected with the controller, the grounding pin of the thermopile sensor is grounded, and the positive voltage output pin and the negative voltage output pin of the thermopile sensor are both connected with the signal amplification unit.
7. The power control circuit of claim 5,
the signal amplification unit comprises an operational amplifier;
the non-inverting input end and the inverting input end of the operational amplifier are both connected to the temperature detection unit, and the output end of the operational amplifier is connected with the controller.
8. The power control circuit of claim 1,
the switch module comprises a second switch tube and a relay;
the control end of second switch tube with the controller is connected, the first end ground connection of second switch tube, the second end of second switch tube with the first end of the coil of relay is connected, the second end and the first power of the coil of relay are connected, the both ends of a set of normally open contact of relay respectively with input power supply and power supply connects.
9. The power control circuit according to any one of claims 1 to 8,
the power supply control circuit also comprises a power supply module;
the power supply module is respectively connected with the input power supply and each module in the power supply control circuit, and the power supply module is used for converting the input power supply so as to provide power supply voltage for each module in the power supply control circuit based on the input power supply.
10. An outlet, characterized in that it comprises a power supply source and a power control circuit according to any one of claims 1-9;
the power supply control circuit is respectively connected with the input power supply and the power supply, and is used for controlling the connection state between the input power supply and the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120942968.1U CN215871190U (en) | 2021-04-30 | 2021-04-30 | Power supply control circuit and socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120942968.1U CN215871190U (en) | 2021-04-30 | 2021-04-30 | Power supply control circuit and socket |
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| Publication Number | Publication Date |
|---|---|
| CN215871190U true CN215871190U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120942968.1U Active CN215871190U (en) | 2021-04-30 | 2021-04-30 | Power supply control circuit and socket |
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| Country | Link |
|---|---|
| CN (1) | CN215871190U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116224818A (en) * | 2023-05-10 | 2023-06-06 | 深圳市创诺新电子科技有限公司 | Control method and control device of household power system and household power system |
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2021
- 2021-04-30 CN CN202120942968.1U patent/CN215871190U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116224818A (en) * | 2023-05-10 | 2023-06-06 | 深圳市创诺新电子科技有限公司 | Control method and control device of household power system and household power system |
| CN116224818B (en) * | 2023-05-10 | 2023-09-08 | 深圳市创诺新电子科技有限公司 | Control method and control device of household power system and household power system |
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