Socket and door with same
A socket includes: an input terminal configured to be electrically connected to an AC power source; an output terminal configured to output an AC signal of the AC power supply; a switch circuit electrically connected between the input terminal and the output terminal; a step-down circuit electrically connected to the input terminal and configured to reduce the amplitude of the AC signal; a shaping circuit electrically connected to the step-down circuit and configured to convert the AC signal with reduced amplitude into a shaped signal; and a control circuit electrically connected to the shaping circuit and the switch circuit and configured to control the switch circuit based on the shaping signal to enable the switch circuit performs switching operation only when the AC signal is at zero potential. A door includes the socket.
1. A socket, comprising:
an input terminal configured to be electrically connected to an AC power source;
an output terminal configured to output an AC signal;
a switch circuit electrically connected between the input terminal and the output terminal;
a step-down circuit electrically connected to the input terminal and configured to reduce the amplitude of the AC signal;
a shaping circuit electrically connected to the step-down circuit and configured to convert the AC signal with reduced amplitude into a shaped signal; and
a control circuit electrically connected to the shaping circuit and the switch circuit and configured to control the switch circuit based on the shaping signal to enable the switch circuit to perform switching operation only when the AC signal is at zero potential.
2. The socket according to claim 1 , wherein,
the switch circuit comprises a relay electrically connected to the input terminal and the output terminal,
the control circuit is configured to generate a control signal for controlling the relay based on the shaped signal to enable contacts of the relay to be attracted or released only when the AC signal is at zero potential.
3. The socket according to claim 2 , wherein the control signal comprises a first trigger edge and a second trigger edge, the first trigger edge is used for triggering the contact of the relay to attract, and the second trigger edge is used for triggering the release of the contact of the relay, the appearance time of the first trigger edge is determined according to the zero crossing time of the AC signal, the transition time of the shaped signal and the attracting transition time of the relay, the appearance time of the second trigger edge is determined according to the zero crossing time of the AC signal, the transition time of the shaped signal and the release transition time of the relay.
4. The socket according to claim 3 , wherein a delay time of the first trigger edge compared with the rising edge of the shaped signal is calculated according to the following formula:
T x1 =n×z−a−b,
wherein, T x1 is the delay time between the first trigger edge and the rising edge of the shaped signal, a is the time between the zero-crossing time of the AC signal from negative half cycle to positive half cycle and the rising edge time of the shaped signal in the positive half cycle, z is the half cycle of the AC signal, b is the attracting transition time of the relay, and n is a positive integer.
5. The socket according to claim 3 , wherein a delay time of the first trigger edge compared with the falling edge of the shaped signal is calculated according to the following formula:
T y1 =n×z+a−b,
wherein, T y1 is the delay time between the first trigger edge and the falling edge of the shaped signal, a is the time between the zero-crossing time of the AC signal from negative half-cycle to positive half-cycle and the rising edge time of the shaped signal in the positive half-cycle, z is the half-cycle of the AC signal, b is the attracting transition time of the relay, and n is a positive integer.
6. The socket according to claim 3 , wherein a delay time of the second trigger edge compared with the rising edge of the shaped signal is calculated according to the following formula:
T x2 =n×z−a−c,
wherein, T x2 is the delay time of the second trigger edge compared with the rising edge of the shaped signal, a is the time between the zero crossing time of the AC signal from negative half cycle to positive half cycle and the rising edge time of the shaped signal in the positive half cycle, z is the half cycle of the AC signal, c is the release transition time of the relay, and n is a positive integer.
7. The socket according to claim 3 , wherein a delay time of the second trigger edge compared with the falling edge of the shaped signal is calculated according to the following formula:
T y2 =n×z+a−c,
wherein, T y2 is the delay time between the second trigger edge and the falling edge of the shaped signal, a is the time between the zero-crossing time of the AC signal from negative half-cycle to positive half-cycle and the rising edge time of the shaped signal in the positive half-cycle, z is the half-cycle of the AC signal, c is the release transition time of the relay, and n is a positive integer.
8. The socket according to claim 2 , wherein the step-down circuit comprises:
a first resistor, a first end of the first resistor is electrically connected to the input terminal; and
a second resistor, a first end of the second resistor is electrically connected to a second end of the first resistor, the second end of the second resistor is grounded,
wherein, the resistance value of the second resistor is 0.5% to 1.5% of the resistance value of the first resistor.
9. The socket according to claim 8 , wherein the shaping circuit comprises:
an NMOSFET, the source of which is grounded;
a third resistor, the first end of which is electrically connected to the first end of the second resistor, and the second end of which is electrically connected to the gate of the NMOS field effect transistor;
a fourth resistor, a first end of which is electrically connected to the working voltage, and a second end of which is electrically connected to the drain of the NMOS field effect transistor; and
a first capacitor, a first end of which is electrically connected to the gate of the NMOS field effect transistor, and a second end of which is grounded.
10. The socket according to claim 9 , wherein an AC signal input end of the relay is electrically connected to the input terminal, an AC signal output end of the relay is electrically connected to the output terminal, and a first control end of the relay is connected to the working voltage,
the switch circuit further comprises:
a triode, the collector of which is electrically connected to the second control end of the relay, and the emitter of which is grounded;
a fifth resistor, a first end of which is electrically connected to the control signal output end of the control circuit, and a second end of which is electrically connected to the base of the triode;
a first diode, the anode of which is electrically connected to the second end of the fifth resistor, and the cathode of which is electrically connected to the first end of the fifth resistor;
a second diode, the anode of which is electrically connected to the second control end of the relay, and the cathode of which is electrically connected to the first control end of the relay;
a second capacitor, a first end of which is electrically connected to a second end of the fifth resistor, the second end of which is grounded;
a third capacitor, a first end of which is electrically connected to the operating voltage, and a second end of which is grounded; and
a fourth capacitor, a first end of which is electrically connected to the operating voltage, and a second end of which is grounded.
11. The socket according to claim 1 , wherein the step-down circuit is configured to reduce the amplitude of the AC signal to 0.5% to 1.5% of its initial value.
12. The socket according to claim 1 , wherein the switch circuit is configured to control connection and disconnection between the input terminal and the output terminal.
13. The socket according to claim 1 , wherein the step-down circuit is configured to reduce the amplitude of the AC signal by dividing the AC signal of the AC power supply.
14. The socket according to claim 1 , further comprising: a first phase detection circuit configured to detect the phase of the AC signal and a second phase detection circuit configured to detect the phase of the shaping signal.
15. A door, comprising:
a door frame for fixing to a wall;
a door body connected to the door frame by a hinge to enable the door body to pivot between an open position and a closed position relative to the door frame; and
a socket, comprising:
an input terminal configured to be electrically connected to an AC power source;
an output terminal configured to output an AC signal;
a switch circuit electrically connected between the input terminal and the output terminal;
a step-down circuit electrically connected to the input terminal and configured to reduce the amplitude of the AC signal;
a shaping circuit electrically connected to the step-down circuit and configured to convert the AC signal with reduced amplitude into a shaped signal; and
a control circuit electrically connected to the shaping circuit and the switch circuit and configured to control the switch circuit based on the shaping signal to enable the switch circuit to perform switching operation only when the AC signal is at zero potential.
16. The door according to claim 15 , further comprising:
a plug fixed on the door body,
wherein, the plug and the socket are configured such that the plug is inserted into the socket when the door body is in a closed position, and the plug is separated from the socket when the door body is in an open position.
17. The door according to claim 16 , wherein the plug comprises a connecting pin, and the socket comprises an insertion hole for receiving the connecting pin, wherein the insertion hole is located at one side of the door frame facing the door body.
18. The door according to claim 17 , wherein the connecting pin and the insertion hole are both arc-shaped, and the center of the arc-shaped is located on the rotation axis of the hinge.
19. The door according to claim 15 , further comprising:
a second wireless power transmission device arranged on the door frame and electrically connected with the socket; and
a first wireless power transmission device arranged on the door body;
wherein, the first wireless power transmission device and the second wireless power transmission device are configured to cling to the second wireless power transmission device for wireless power transmission when the door body is in the closed position, and separate from the second wireless power transmission device when the door body is in the open position.
20. The door according to claim 15 , further comprising:
a lock fixed on the door body and comprises a bolt and a bolt driving device,
wherein, the bolt and the socket are configured such that when the door body is in the closed position, the bolt is aligned with the insertion hole of the socket,
wherein, the bolt driving device is configured to drive the bolt into the insertion hole when the bolt is aligned with the insertion hole of the socket.