Automatic power-on circuit and intelligent socket

Abstract

The utility model provides an automatic power-on circuit and an intelligent socket. The automatic power-on circuit comprises a first switch module, a driving module and a second switch module. The first switch module is used for being connected with a power source, the control end of the first switch module is used for being connected with a load, the first switch module is connected with the driving module, and the driving module is further connected with the second switch module. The first switch module is used for outputting power supply voltage if a load is connected when the power supply is powered on; the driving module is used for outputting a driving voltage within a preset time based on the power supply voltage when the power supply voltage is received; and the second switch module is used for outputting a power-on signal under the control of the driving voltage. According to the automatic power-on circuit and the intelligent socket, the power-on process can be automatically completed when the power supply is powered on and the load is connected, so that the use convenience of equipment and the automation degree of the system are improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of electronic circuit, in particular to an automatic start-up circuit and a smart socket. BACKGROUND

[0002] When a conventional smart socket is connected to an AC (Alternating Current) power supply and a load, a manual button is usually used to start up.

[0003] However, the AC power supply usually has a high voltage, and the common household power supply is 220V or 110V. When a user manually contacts the button, if the insulation performance of the socket shell is poor, damaged or aged, an electric shock accident will occur. In actual use scenarios, when multiple smart sockets are managed in a commercial place or industrial environment, the staff needs to manually operate one by one, which consumes a lot of time and effort, and the work efficiency is not high. CONTENT OF THE INVENTION

[0004] Embodiments of the present application provide an automatic start-up circuit and a smart socket, which can automatically complete the start-up process when the power supply is powered on and connected to a load, thereby improving the use convenience of the device.

[0005] In a first aspect, embodiments of the present application provide an automatic start-up circuit, which comprises a first switch module, a driving module and a second switch module; the first switch module is used to be connected to a power supply, a control end of the first switch module is used to be connected to a load, the first switch module is connected to the driving module, and the driving module is further connected to the second switch module; the first switch module is used to output a power supply voltage when the power supply is powered on and a load is connected; the driving module is used to output a driving voltage based on the power supply voltage within a preset time when the power supply voltage is received; and the second switch module is used to output a start-up signal under the control of the driving voltage.

[0006] In some embodiments, the driving module comprises a switch unit and a delay unit; a first end of the switch unit is connected to the first switch module, a second end of the switch unit is connected to the second switch module, and a control end of the switch unit is connected to the delay unit; the switch unit is used to be turned on at an initial stage when the power supply voltage is received, and to supply power to the delay unit based on the power supply voltage, while outputting the driving voltage; and the delay unit is used to be disconnected within a preset time after the switch unit is turned on, so that the control end of the switch unit is disconnected, so that the switch unit is turned off and stops outputting the driving voltage.

[0007] In some embodiments, the switch unit comprises a switch tube Q2 and a resistor R2; a first end of the switch tube Q2 is connected with the first switch module, a second end of the switch tube Q2 is connected with the second switch module, a control end of the switch tube Q2 is connected with a first end of the resistor R2, and a second end of the resistor R2 is connected with the delay unit.

[0008] In some embodiments, the delay unit comprises a capacitor C1, a diode D1 and a resistor R3; a first end of the capacitor C1 is connected with a positive electrode of the diode D1 and a control end of the switch unit respectively, a negative electrode of the diode D1 is connected with a first end of the resistor R3 and a first end of the switch unit respectively, and a second end of the capacitor C1 and a second end of the resistor R3 are both grounded.

[0009] In some embodiments, the first switch module comprises a switch tube Q1 and a resistor R1; a first end of the switch tube Q1 is connected with the power supply, a second end of the switch tube Q1 is connected with the drive module, a control end of the switch tube Q1 is connected with a first end of the resistor R1, and a second end of the resistor R1 is used for being connected with the load.

[0010] In some embodiments, the second switch module comprises a switch tube Q3 and a resistor R5; a control end of the switch tube Q3 is connected with the drive module, a first end of the switch tube Q3 is connected with a second end of the resistor R5, a first end of the resistor R5 is connected with the power supply, a second end of the switch tube Q3 is grounded, and the first end of the switch tube Q3 is used for outputting the power-on signal.

[0011] In some embodiments, the automatic power-on circuit further comprises a key module; the key module is connected with the second switch module; the key module is used for outputting the power-on signal based on a preset action of a user when the preset action is received.

[0012] In some embodiments, the key module comprises a key switch B1; a first end of the key switch B1 is connected with the second switch module, and a second end of the key switch B1 is grounded.

[0013] In some embodiments, the automatic power-on circuit further comprises a filter module; the filter module is connected with the drive module and the second switch module respectively; the filter module is used for filtering a voltage output by the drive module.

[0014] In the second aspect, the embodiments of the present application provide an intelligent socket, which comprises the automatic power-on circuit as described above.

[0015] Different from the prior art, the embodiment of the present application provides an automatic starting circuit and a smart socket. When the power is powered on, the first switch module detects whether a load is connected. If the load is connected, the first switch module outputs a power supply voltage. The driving module starts to work when receiving the power supply voltage output by the first switch module, and outputs a driving voltage within a preset time based on the power supply voltage. After receiving the driving voltage output by the driving module, the switch element in the second switch module is turned on under the control of the driving voltage, so as to output a starting signal, which is used to trigger the device to start and complete the automatic starting process. The automatic starting circuit and the smart socket can automatically complete the starting process when the power is powered on and the load is connected, without manual operation, and are suitable for devices and systems that need to be automatically controlled, thereby improving the use convenience of the device and the automation degree of the system. BRIEF DESCRIPTION OF DRAWINGS

[0016] One or more embodiments are illustrated by way of example in the accompanying drawings, which are not intended to be limiting of the embodiments, and in which like references numbers refer to like elements. The drawings are not intended to be to scale.

[0017] Figure 1 is a structural block diagram of an automatic starting circuit provided by the embodiment of the present application;

[0018] Figure 2 is a structural block diagram of another automatic starting circuit provided by the embodiment of the present application;

[0019] Figure 3 is a structural block diagram of a driving module provided by the embodiment of the present application;

[0020] Figure 4 is a circuit structure schematic diagram of an automatic starting circuit provided by the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all of the embodiments of the present application. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0022] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0023] When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements can be present therebetween.

[0024] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class and do not limit the number of objects, for example, the first object can be one or more.

[0025] Please refer to Figure 1 , Figure 1 is a structural block diagram of an automatic start-up circuit 100 provided by an embodiment of the present application.

[0026] An embodiment of the present application provides an automatic start-up circuit 100, which comprises a first switch module 11, a driving module 12 and a second switch module 13. The first switch module 11 is used to be connected with a power supply 200, a control end of the first switch module 11 is used to be connected with a load 300, the first switch module 11 is connected with the driving module 12, and the driving module 12 is further connected with the second switch module 13.

[0027] Specifically, the first switch module 11 is used to output a supply voltage when the power supply 200 is powered on and the first switch module 11 is connected with the load 300. The driving module 12 is used to output a driving voltage within a preset time based on the supply voltage when the supply voltage is received. The second switch module 13 is used to output a start-up signal under the control of the driving voltage.

[0028] The power supply 200 can be an alternating current power supply, a direct current power supply or the like, and is used for power supply.

[0029] The supply voltage is a voltage output by the first switch module 11 when the power supply 200 is powered on and the load 300 is connected. It is a working voltage provided for subsequent circuit modules after the voltage of the power supply 200 is processed and regulated by the first switch module 11.

[0030] The preset time is a pre-set time value. When the driving module 12 receives the supply voltage, it will perform a series of internal processing and operation within the preset time, and then output the driving voltage. The length of the preset time is determined according to the overall performance requirements of the automatic start-up circuit 100 and the actual application scenario.

[0031] The driving voltage is a voltage signal output by the driving module 12 within the preset time after receiving the supply voltage. It is a voltage used to control the working state (such as the conduction state) of the second switch module 13.

[0032] The start-up signal is a signal output by the second switch module 13 under the control of the driving voltage, which is used to trigger the start-up operation of the connected system. It can be a voltage signal of a specific level (for example, a low-level signal), or a pulse signal conforming to a specific protocol or specification, etc., which is the final output result of the entire automatic start-up circuit 100, and its function is to start the system connected thereto or to make the system enter a normal working state.

[0033] In actual application, when the power supply 200 is powered on, the first switch module 11 detects in real time whether there is a load 300 connected. If it is detected that there is a load 300 connected, it means that the circuit system needs to perform start-up operation, at which time the first switch module 11 starts to work. After the load 300 is connected, the first switch module 11 outputs a power supply voltage based on the power of the power supply 200. Then, the driving module 12 starts to work when receiving the power supply voltage output by the first switch module 11. Within a preset time, the driving module 12 outputs a driving voltage based on the power supply voltage. Then, the second switch module 13 outputs a start-up signal when receiving the driving voltage output by the driving module 12. Thus, when the load is connected, the start-up signal is sent to the control unit (not shown in the figure) to realize automatic start-up.

[0034] Please refer to Figure 2 , Figure 2 is another structural block diagram of the automatic start-up circuit 100 provided by the embodiments of the present application.

[0035] In some embodiments, the automatic start-up circuit 100 further comprises a key module 14. The key module 14 is connected with the second switch module 13. Specifically, the key module 14 is used to output a start-up signal based on a preset action when receiving the preset action of the user.

[0036] The preset action refers to a specific operation behavior of the user for the key module 14, and its purpose is to trigger the output of the start-up signal, and then start the device start-up. The preset action can be a key action, a dial action, etc.

[0037] For example, when the preset action is a key action, the user presses a key in the key module 14 to make the key module 14 output the start-up signal.

[0038] In some embodiments, the automatic start-up circuit 100 further comprises a filter module 15. The filter module 15 is connected with the driving module 12 and the second switch module 13, respectively. Specifically, the filter module 15 is used to filter the voltage output by the driving module 12.

[0039] Please refer to Figure 3 , Figure 3 is a structural block diagram of the driving module 12 provided by the embodiments of the present application.

[0040] In some embodiments, the driving module 12 comprises a switching unit 121 and a delay unit 122. The first end of the switching unit 121 is connected with the first switch module 11, the second end of the switching unit 121 is connected with the second switch module 13, and the control end of the switching unit 121 is connected with the delay unit 122. Specifically, the switching unit 121 is used to be turned on in the initial stage of receiving the power supply voltage, and to supply power to the delay unit 122 based on the power supply voltage, while outputting the driving voltage. The delay unit 122 is used to be turned off in the preset time after the switching unit 121 is turned on, so that the control end of the switching unit 121 is disconnected, thereby the switching unit 121 is turned off and stops outputting the driving voltage.

[0041] In actual application, when the first switch module 11 outputs the power supply voltage, the voltage is transmitted to the first end of the switching unit 121. In the initial stage of receiving the power supply voltage, the switching unit 121 is turned on. After the switching unit 121 is turned on, on the one hand, the power supply voltage is transmitted to the second end (connected with the second switch module 13) to provide the basis for the driving voltage of the subsequent second switch module 13; on the other hand, the power supply voltage is transmitted to the delay unit 122 to supply power to the delay unit 122, so that the delay unit 122 starts to work. When the delay unit 122 counts to the preset time, it will perform the disconnection operation. This preset time is determined by the internal circuit parameters (such as capacitance, resistance, etc.) of the delay unit 122. The disconnection of the delay unit 122 will cause the control end of the switching unit 121 to be disconnected, that is, the switching unit 121 loses the control signal for maintaining the turn-on. Since the connection of the control end is cut off, the switching unit 121 no longer meets the turn-on condition, and thus is turned off. After the switching unit 121 is turned off, the second end stops outputting the driving voltage, and at this time the second switch module 13 no longer receives the driving voltage of the driving module 12.

[0042] Please refer to Figure 4 , Figure 4 is a circuit structure schematic diagram of an automatic start-up circuit 100 provided by the embodiments of the present application.

[0043] In some embodiments, the switching unit 121 comprises a switching tube Q2 and a resistor R2. The first end of the switching tube Q2 is connected with the first switch module 11, the second end of the switching tube Q2 is connected with the second switch module 13, the control end of the switching tube Q2 is connected with the first end of the resistor R2, and the second end of the resistor R2 is connected with the delay unit 122.

[0044] The switching tube Q2 can be a PNP triode or any other suitable switching tube. Figure 4In the embodiment, the switch tube Q2 is taken as a PNP triode as an example. The base of the PNP triode is the control terminal of the switch tube Q2, the emitter of the PNP triode is the first terminal of the switch tube Q2, and the collector of the PNP triode is the second terminal of the switch tube Q2.

[0045] In some embodiments, the delay unit 122 includes a capacitor C1, a diode D1, and a resistor R3. The first terminal of the capacitor C1 is connected to the positive electrode of the diode D1 and the control terminal of the switch unit 121 respectively, the negative electrode of the diode D1 is connected to the first terminal of the resistor R3 and the first terminal of the switch unit 121 respectively, and the second terminal of the capacitor C1 and the second terminal of the resistor R3 are grounded.

[0046] In some embodiments, the first switch module 11 includes a switch tube Q1 and a resistor R1. The first terminal of the switch tube Q1 is connected to the VCC of the power supply 200, the second terminal of the switch tube Q1 is connected to the driving module 12, the control terminal of the switch tube Q1 is connected to the first terminal of the resistor R1, and the second terminal of the resistor R1 is used to be connected to the load 300 (equivalent to a resistor Ri). Figure 4

[0047] In the embodiment, the switch tube Q1 is taken as a PNP triode as an example. The base of the PNP triode is the control terminal of the switch tube Q1, the emitter of the PNP triode is the first terminal of the switch tube Q1, and the collector of the PNP triode is the second terminal of the switch tube Q1. Figure 4

[0048] In some embodiments, the second switch module 13 includes a switch tube Q3 and a resistor R5. The control terminal of the switch tube Q3 is connected to the driving module 12, the first terminal of the switch tube Q3 is connected to the second terminal of the resistor R5, the first terminal of the resistor R5 is connected to the power supply 200, the second terminal of the switch tube Q3 is grounded, and the first terminal of the switch tube Q3 is used to output a power-on signal.

[0049] In the embodiment, the switch tube Q3 is taken as a PNP triode as an example. The base of the PNP triode is the control terminal of the switch tube Q3, the emitter of the PNP triode is the first terminal of the switch tube Q3, and the collector of the PNP triode is the second terminal of the switch tube Q3. Figure 4

[0050] In some embodiments, the key module 14 includes a key switch B1. The first terminal of the key switch B1 is connected to the second switch module 13, and the second terminal of the key switch B1 is grounded.

[0051] ​​​Specifically, when the user performs a preset action, for example, presses the key switch B1, the circuit between the two connection ends of the key switch B1 is connected, and KEY_EN is low (power-on signal) due to being connected to the ground. When the user does not operate the key switch B1, the key switch B1 is in the off state.

[0052] In some embodiments, the filtering module 15 includes a capacitor C2 and a resistor R4. The first end of the capacitor C2 is connected to the first end of the resistor R4, the driving module 12, and the second switch module 13, respectively, and the second end of the capacitor C2 is grounded.

[0053] The working principle of the automatic power-on circuit 100 is described below. Figure 4 The working principle of the automatic power-on circuit 100 is described below.

[0054] When the power supply 200 (VCC) is connected and the load 300 is connected, it is equivalent to connecting the resistor Ri, the control end (base) of the switch tube Q1 is pulled low, so that the switch tube Q1 is turned on, and the second end (collector) of the switch tube Q1 outputs the supply voltage. Since the voltage of the capacitor C1 does not change abruptly, the control end (base) of the switch tube Q2 is pulled low in a short time (i.e., within a preset time), and the switch tube Q2 is turned on. And start charging the capacitor C1, when the capacitor C1 is charged to a voltage value close to the supply voltage (which can be approximately the voltage value of VCC), the switch tube Q2 enters the off state, at this time ​ The driving voltage (pulse voltage) appears at point A. The switch tube Q3 is turned on, and the voltage at KEY_EN is pulled low (power-on signal) for a short time. Thus, the device or circuit connected to KEY_EN receives the power-on signal.

[0055] In addition, when the load 300 (resistor Ri) is connected and then disconnected, the second end of the resistor R1 is equivalent to being disconnected, and the control end of the switch tube Q1 is also disconnected at this time, so that the switch tube Q1 is not turned on. The amount of charge previously charged by the capacitor C1 is discharged through the loop capacitor C1 / diode D1 / resistor R3 / GND, thereby preparing for the next identification. When the load 300 is connected to the circuit again, it is equivalent to connecting the resistor Ri, forming a path, the switch tube Q1 is turned on, the capacitor C1 is charged, the switch tube Q2 is turned on and closed, and the pulse voltage (driving voltage) appears at point A. Thus, the automatic power-on action after the load is connected again can be identified.

[0056] At the same time, the key switch B1 can be used for key-on. If no load 300 (resistor Ri) is detected, the key switch B1 can be pressed manually, and KEY_EN is pulled low (power-on signal), which can also be powered on.

[0057] The embodiment of the present application provides an automatic starting circuit 100. When the power supply 200 is powered on, the first switch module 11 detects whether the load 300 is connected. If the load 300 is connected, the state of the electronic element in the first switch module 11 changes, enables the internal circuit to be turned on, and thus outputs a power supply voltage. The driving module 12 starts to work when receiving the power supply voltage output by the first switch module 11. The switch unit in the driving module 12 is turned on under the action of the power supply voltage in the initial stage, on the one hand, the power supply voltage is transmitted to the delay unit 122 to supply power for the delay unit 122, and on the other hand, the driving voltage is output based on the power supply voltage. At the same time, the delay unit 122 starts timing. When the delay unit 122 timing reaches the preset time, the delay unit 122 disconnects the control end of the switch unit, the switch unit is cut off and stops outputting the driving voltage, and the second switch module 13 restores the initial state after losing the driving voltage and waits for the next trigger. After receiving the driving voltage output by the driving module 12, the switch element in the second switch module 13 is turned on under the control of the driving voltage, and thus a starting signal is output, the signal is used for triggering the equipment to start, and the automatic starting process is completed. The circuit can automatically complete the starting process when the power supply is powered on and the load is connected, does not need manual operation, is suitable for devices and systems that need to be automatically controlled, such as devices in a server room, unattended monitoring devices and the like, and improves the use convenience of the device and the automation degree of the system. At the same time, when no load is detected, the user can also start by pressing the key.

[0058] The embodiment of the present application also provides an intelligent socket, and the intelligent socket comprises the automatic starting circuit 100.

[0059] The intelligent socket can further comprise a control unit connected with the automatic starting circuit 100. The control unit is used for starting to supply power to the load 300 and / or other connected components by the structure in the control unit when receiving the starting signal output by the automatic starting circuit 100. The control unit can be an MCU (Micro Controller Unit, microcontroller) or any device capable of realizing the above functions.

[0060] The circuit structure and working principle of the automatic starting circuit 100 can refer to the above embodiment, and details are not repeated here.

[0061] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, rather than limiting them; under the idea of the present application, the technical features in the above examples or different examples can also be combined, and there are many other changes of different aspects of the present application as described above, in order to be simple, they are not provided in details; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of each embodiment of the present application.

Claims

1. An automatic power-on circuit, characterized by comprising: The automatic starting circuit comprises a first switch module, a driving module and a second switch module; The first switch module is used for being connected with a power supply, a control end of the first switch module is used for being connected with a load, the first switch module is connected with the driving module, and the driving module is further connected with the second switch module; The first switch module is used for outputting a power supply voltage when the power supply is powered on and the load is connected; The driving module is used for outputting a driving voltage within a preset time based on the power supply voltage when the power supply voltage is received; The second switch module is used for outputting a starting signal under the control of the driving voltage.

2. The automatic turn-on circuit according to claim 1, wherein The driving module comprises a switch unit and a delay unit; A first end of the switch unit is connected with the first switch module, a second end of the switch unit is connected with the second switch module, and a control end of the switch unit is connected with the delay unit; The switch unit is used for being turned on at an initial stage when the power supply voltage is received, and is used for supplying power to the delay unit based on the power supply voltage and outputting the driving voltage; The delay unit is used for being turned off within a preset time after the switch unit is turned on, so that the control end of the switch unit is turned off, and the switch unit is turned off and stops outputting the driving voltage.

3. The automatic turn-on circuit according to claim 2, wherein The switch unit comprises a switch tube Q2 and a resistor R2; A first end of the switch tube Q2 is connected with the first switch module, a second end of the switch tube Q2 is connected with the second switch module, a control end of the switch tube Q2 is connected with a first end of the resistor R2, and a second end of the resistor R2 is connected with the delay unit.

4. The automatic turn-on circuit according to claim 2, wherein The delay unit comprises a capacitor C1, a diode D1 and a resistor R3; A first end of the capacitor C1 is connected with a positive electrode of the diode D1 and the control end of the switch unit respectively, a negative electrode of the diode D1 is connected with a first end of the resistor R3 and a first end of the switch unit respectively, and a second end of the capacitor C1 and a second end of the resistor R3 are grounded.

5. The automatic turn-on circuit according to claim 1, wherein The first switch module comprises a switch tube Q1 and a resistor R1; A first end of the switch tube Q1 is connected with the power supply, a second end of the switch tube Q1 is connected with the driving module, a control end of the switch tube Q1 is connected with a first end of the resistor R1, and a second end of the resistor R1 is used for being connected with the load.

6. The automatic turn-on circuit according to claim 1, wherein The second switch module comprises a switch tube Q3 and a resistor R5; A control end of the switch tube Q3 is connected with the driving module, a first end of the switch tube Q3 is connected with a second end of the resistor R5, a first end of the resistor R5 is connected with the power supply, a second end of the switch tube Q3 is grounded, and the first end of the switch tube Q3 is used for outputting the starting signal.

7. The automatic turn-on circuit according to claim 1, wherein The automatic starting circuit further comprises a key module; The key module is connected with the second switch module; The key module is used for outputting the starting signal based on a preset action of a user when the preset action is received.

8. The automatic turn-on circuit according to claim 7, wherein The key module comprises a key switch B1; A first end of the key switch B1 is connected with the second switch module, and a second end of the key switch B1 is grounded.

9. The automatic start-up circuit according to any one of claims 1 to 8, characterized by The automatic starting circuit further comprises a filtering module; The filtering module is connected with the driving module and the second switch module respectively; The filtering module is used for filtering the voltage output by the driving module.

10. A smart socket, characterized by, The intelligent socket comprises the automatic starting circuit according to any one of claims 1 to 9.

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