CN115015798A - Low power consumption detection circuit, electronic device, and flashing state detection method - Google Patents

Abstract

The invention discloses a low power consumption detection circuit and an electronic device, wherein the low power consumption detection circuit is applied to the detection of a flashing state, and includes: a power consumption circuit, an optocoupler, and a control circuit; The power consumption circuit is used to correspondingly increase the impedance of the live line branch or the neutral line branch between the AC power supply and the optocoupler according to the change of the AC waveform; the optocoupler, connected in series with the power consumption circuit, is used to compare the The first current input at the input end corresponds to the preset working current of the optocoupler, and outputs a level signal according to the comparison result; the control circuit, connected in series with the optocoupler, is used to detect whether the AC power supply flashes according to the level signal . The problems of high cost and high power consumption of the detection circuit in the related art are solved.

Description

Low power consumption detection circuit, electronic device, and flashing state detection method

technical field

The invention relates to the technical field of smart home, and in particular, to a low-power consumption detection circuit, an electronic device, and a flashing state detection method.

Background technique

With the development of the smart home industry, there are more and more types of smart appliances. After the traditional local power switch is closed, the smart appliance will also be disconnected, so that the terminal cannot control it remotely. Therefore, flash switches are widely used in smart home devices. In the normal state, the flash switch keeps the power supply and the electrical load connected. When pressed by an external force, the flash switch disconnects the power supply and the electrical load. After the external force is removed, the flash switch quickly returns to the normal state. In addition, the circuit structure of the existing flash detection circuit is relatively complicated, and the component cost is relatively high.

How to improve the detection accuracy of the flash in the circuit, reduce the detection power consumption, and save the circuit cost has become an urgent problem to be solved.

In the related art, the problems of high cost and high power consumption of the detection circuit in the related art are solved, and an effective solution has not yet been proposed.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a low power consumption detection circuit, an electronic device, and a flash state detection method, so as to at least solve the problems of the related art, such as high cost and high power consumption of the detection circuit in the related art.

According to an embodiment of the present invention, a low power consumption detection circuit is provided, including: a power consumption circuit, an optocoupler, and a control circuit; and a power consumption circuit for correspondingly increasing the AC power supply and The impedance of the live wire branch or the neutral wire branch between the optocouplers; the optocoupler, connected in series with the power dissipation circuit, is used to compare the first current input at the input end of the optocoupler with the preset operating current corresponding to the optocoupler and output the level signal according to the comparison result; the control circuit, connected with the output end of the optocoupler, is used to detect whether the AC power supply flashes or not according to the level signal.

Optionally, the above-mentioned low power consumption detection circuit further includes: a first reverse diode; wherein, the output end of the first reverse diode is connected to the output end of the flash switch, and the input end of the first reverse diode is connected to the power consumption The input end of the circuit is connected to determine whether to conduct conduction based on the current AC waveform corresponding to the AC power source.

Optionally, the above-mentioned power consumption circuit includes: a second reverse diode and a target resistance; the second reverse diode, connected in series with the optocoupler, is used to control the AC power corresponding to the live wire branch or the neutral wire branch according to the AC waveform. The conduction condition of the circuit; the target resistance, connected in parallel with the second reverse diode, is used to increase the impedance of the live wire branch or the neutral wire branch when the second reverse diode is not turned on.

Optionally, the above-mentioned low-power consumption detection circuit further includes: a current-limiting resistor, wherein the current-limiting resistor is connected in series with the flash switch and the optocoupler, respectively, and is used to reduce the current of the AC power input to the low-power consumption detection circuit, wherein the reduced current It is used to instruct to limit the first current of the AC power input to the second current.

Optionally, the above-mentioned current-limiting resistor includes: a first current-limiting resistor and a second current-limiting resistor with the same resistance value as the first current-limiting resistor; wherein the first current-limiting resistor and the second current-limiting resistor They are respectively arranged on the live wire branch and the neutral wire branch corresponding to the AC power supply.

Optionally, the above-mentioned optocoupler includes: a light-emitting diode; wherein, the light-emitting diode is used to emit light after the second current input at the input end of the optocoupler is greater than or equal to a preset working current, and the preset working current is that the light-emitting diode enters the light-emitting state. State minimum current.

Optionally, the upper optocoupler also includes: a phototransistor; wherein, the phototransistor is used to enter a conducting state when the base of the phototransistor receives the light emitted by the light-emitting diode, and output the phototransistor in the conducting state. the preset low level; or enter the cut-off state after determining that the light-emitting diode does not enter the light-emitting state, and output the preset high level of the phototransistor in the cut-off state.

Optionally, the above-mentioned control circuit includes: a third resistor and a first capacitor; the third resistor is connected to the collector of the phototransistor, and is used to divide the preset voltage loaded on the collector to obtain the voltage loaded on the phototransistor. The third voltage of the collector; the first capacitor, connected in parallel with the phototransistor, is used to provide a fourth voltage for the phototransistor.

According to another embodiment of the embodiments of the present invention, an electronic device is also provided, including: a power consumption circuit, an optocoupler, and a control circuit; and a power consumption circuit for correspondingly increasing the AC power supply and light The impedance of the live line branch or the neutral line branch between the couplers; the optocoupler, connected in series with the power dissipation circuit, is used to compare the first current input at the input end of the optocoupler with the preset operating current corresponding to the optocoupler. size, and output a level signal according to the comparison result; the control circuit, connected with the output end of the optocoupler, is used to detect whether the AC power supply flashes or not according to the level signal.

Optionally, the electronic device further includes: a load unit and a load control unit, wherein the load control unit controls the load unit according to the detected signal corresponding to the flashing state in the circuit.

According to another embodiment of the embodiments of the present invention, a control system for an electronic device is also provided, including: a power consumption circuit, an optocoupler, and a control circuit; The impedance of the live line branch or the neutral line branch between the power supply and the optocoupler; the optocoupler, connected in series with the power dissipation circuit, is used to compare the first current input at the input end of the optocoupler with the preset corresponding to the optocoupler The size of the working current, and output the level signal according to the comparison result; the control circuit, connected to the output end of the optocoupler, is used to detect whether the AC power supply flashes according to the level signal; the above control system also includes: a load unit and a load control unit, wherein the load control unit controls the load unit according to the detected signal corresponding to the flashing state in the circuit.

Optionally, the above-mentioned control system further includes: a flash switch, wherein the input end of the flash switch is connected in series with the AC power supply, and the output end of the flash switch is connected in series with an electronic device, which is used to control the AC power supply and the electronic device according to the state change of the flash switch. On-off of the device.

According to another embodiment of the embodiments of the present invention, a method for detecting a flashing state is further provided, including: determining a digital signal corresponding to an AC power source output by a low-power consumption detection circuit, wherein the digital signal is a signal in the low-power consumption detection circuit. The optocoupler outputs a level signal by comparing the first current input at the input end of the optocoupler with the preset operating current corresponding to the optocoupler; whether the AC power supply flashes is determined by a digital signal.

According to another embodiment of the present invention, a flash detection and control device is further provided, including: a detection module for determining a digital signal corresponding to the AC power output by the low power consumption detection circuit, wherein the digital signal is low The optocoupler in the power consumption detection circuit outputs a level signal by comparing the first current input at the input end of the optocoupler with the preset working current corresponding to the optocoupler; the control module is used to determine whether the AC power supply flashes through the digital signal. break.

According to another embodiment of the embodiments of the present invention, a method for controlling an electronic device is further provided, including: supporting the electronic device to be in a continuous online state based on a flash state detection method, wherein the continuous online state is through a flash state detection circuit When the AC power supply flashes, the power supply of the control circuit of the electronic device is ensured; when it is determined that the electronic device is in a continuous online state, the remote control of the electronic device is performed through the control circuit.

In the embodiment of the present invention, a power consumption circuit, an optocoupler, and a control circuit are used; the power consumption circuit is used to correspondingly increase the live wire branch or zero line between the AC power supply and the optocoupler according to the change of the AC waveform. The impedance of the line branch; the optocoupler, connected in series with the power dissipation circuit, is used to compare the magnitude of the first current input at the input end of the optocoupler and the preset operating current corresponding to the optocoupler , and output a level signal according to the comparison result; the control circuit, connected to the output end of the optocoupler, is used for detecting whether the AC power supply flashes or not according to the level signal. That is, the low power consumption detection circuit is used to detect the flash break of the AC power supply in real time, and the circuit structure of the low power consumption detection circuit is simple, the component cost is low, and the flash break detection accuracy is high. In addition, by citing the power consumption circuit The low power consumption detection circuit can work normally when the AC waveform is in the negative half axis, and when the AC waveform is in the negative half axis, the power consumption circuit is used to expand the impedance in the low power consumption detection circuit to control the power consumption of the negative half axis to decrease. The above technical solution solves the problems of high cost and high power consumption of the detection circuit in the related art. The embodiment of the present invention can realize the accuracy of the flash detection of the circuit, and reduce the occurrence of the failure of the flash detection. Reduce the overall power consumption of the overall detection.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a structural block diagram of a low power consumption detection circuit according to an embodiment of the present invention;

2 is a structural block diagram of another low power consumption detection circuit according to an embodiment of the present invention;

3 is a working diagram of a flash detection circuit of the related art;

4 is a schematic structural diagram of an isolated flash detection circuit of the related art;

5 is a schematic circuit diagram of a low-power flashing state detection circuit according to an optional embodiment of the present invention;

6 is a schematic waveform diagram of a low-power flash-off state detection circuit without flash-off according to an optional embodiment of the present invention;

7 is a schematic diagram of a waveform of a flash-off state detection circuit with low power consumption according to an optional embodiment of the present invention;

8 is a structural diagram of an electronic device according to an embodiment of the present invention;

9 is a structural diagram of a control system of an electronic device according to an embodiment of the present invention;

10 is a flowchart of a method for detecting a flashing state according to an embodiment of the present invention;

11 is a flash detection control device according to an embodiment of the present invention;

FIG. 12 is a flowchart of a control method of an electronic device according to an embodiment of the present invention.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. The preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

The low power consumption detection circuit provided by the embodiments of the present application. FIG. 1 is a structural block diagram of a low power consumption detection circuit according to an embodiment of the present invention. The circuit includes the following: a power consumption circuit 12, an optocoupler 14, and a control circuit 16;

The power consumption circuit 12 is used for correspondingly increasing the impedance of the live wire branch or the neutral wire branch between the AC power supply and the optocoupler according to the change of the AC waveform;

It should be noted that the above-mentioned power consumption circuit can be added to the neutral line branch of the AC power supply or the live line branch of the AC power supply. When the power consumption circuit is added to the neutral line branch, the first power consumption circuit The two reverse diodes are in the same direction as the light emitting diodes in the optocoupler, and the first reverse diode is opposite to the light emitting diode in the optocoupler, that is, the anode of the second reverse diode is connected to the cathode of the light emitting diode, and the cathodes of the two are connected. All point to the neutral line branch side of the AC power supply; at this time, the cathode of the first reverse diode points to the live line branch side of the AC power supply. When the power dissipation circuit is added to the live wire branch, the second reverse diode in the power dissipation circuit is in the same direction as the light emitting diode in the optocoupler, and the first reverse diode is opposite to the light emitting diode in the optocoupler, that is, the second reverse diode is in the opposite direction to the light emitting diode in the optocoupler. The anode of the diode is connected to the cathode of the light-emitting diode, and the cathodes of both point to the live wire branch side of the AC power supply. At this time, the cathode of the first reverse diode points to the neutral branch side of the AC power supply.

The optocoupler 14, connected in series with the power consumption circuit, is used to compare the magnitude of the first current input at the input end of the optocoupler and the preset operating current corresponding to the optocoupler, and output according to the comparison result level signal;

The control circuit 16 is connected to the output end of the optocoupler, and is used for detecting whether the AC power supply flashes or not according to the level signal.

Through the power consumption circuit, the optocoupler, and the control circuit included in the above-mentioned low power consumption detection circuit; the power consumption circuit is used for correspondingly increasing the live wire branch between the AC power supply and the optocoupler according to the change of the AC waveform. The impedance of the neutral line branch; the optocoupler, connected in series with the power consumption circuit, is used to compare the difference between the first current input at the input end of the optocoupler and the preset operating current corresponding to the optocoupler. and output a level signal according to the comparison result; the control circuit, connected to the output end of the optocoupler, is used for detecting whether the AC power supply flashes or not according to the level signal. That is, the low power consumption detection circuit is used to detect the flash break of the AC power supply in real time, and the circuit structure of the low power consumption detection circuit is simple, the component cost is low, and the flash break detection accuracy is high. In addition, by citing the power consumption circuit The low power consumption detection circuit can work normally when the AC waveform is in the negative half axis, and when the AC waveform is in the negative half axis, the power consumption circuit is used to expand the impedance in the low power consumption detection circuit to control the power consumption of the negative half axis to decrease. The above technical solution solves the problems of high cost and high power consumption of the detection circuit in the related art. The embodiment of the present invention can realize the accuracy of the flash detection of the circuit, and reduce the occurrence of the failure of the flash detection. Reduce the overall power consumption of the overall detection.

Optionally, the above-mentioned AC power supply is any power supply that can provide AC power supply for electrical appliances, including commercial power, uninterruptible power supply, AC stabilized power supply and its accessory devices, and the accessory devices are switches, sockets, etc. Don't make too many restrictions.

For example, the working process of the above-mentioned optocoupler is as follows: when the forward second current of the light-emitting diode in the optocoupler is greater than the preset working current, the output phototransistor in the optocoupler is saturated and turned on, and the fourth voltage of the collector output is close to Zero potential, when the second current passes through the reverse diode, the light-emitting diode in the optocoupler will not pass current, the output phototransistor in the optocoupler is turned off, and its collector output voltage is the third voltage, the collector voltage of the phototransistor With the transition of high and low levels in one cycle of the alternating current (ie, mains), the transition signal represents a signal that the alternating current power supply flashes.

FIG. 2 is a structural block diagram of another low power consumption detection circuit according to an embodiment of the present invention.

Optionally, the above-mentioned low power consumption detection circuit further includes: a first reverse diode 24; wherein, the first reverse diode is used for determining whether to conduct conduction based on the current AC waveform corresponding to the AC power supply.

It should be noted that the direction of the above-mentioned first reverse diode is opposite to the direction of the light emitting diode in the optocoupler that has a parallel relationship, that is, in practical applications, the second reverse diode and the light emitting diode need to be in the same direction, and the first The reverse diode is opposite to the light-emitting diode. When the power dissipation circuit is added to the neutral line branch of the AC power supply, the first current limiting resistor is added to the live line branch, and the second current limiting resistor is added to the neutral line branch. The output end (ie the negative electrode) of the first reverse diode is connected to the output end of the first current limiting resistor, and the input end of the first reverse diode is connected to the input end of the power dissipation circuit.

Optionally, the above-mentioned power consumption circuit 12 includes: a second reverse diode 1202 and a target resistor 1204; the second reverse diode, connected in series with the optocoupler, is used to control the AC power supply corresponding to the live wire branch or the circuit according to the AC waveform. Conduction of the neutral line branch; the target resistance, connected in parallel with the second reverse diode, is used to add a live line branch or a neutral line branch when the second reverse diode is not turned on impedance.

As an optional embodiment, when the power dissipation circuit exists on the neutral line branch of the AC power supply, the first current limiting resistor is added on the live line branch, and the second current limiting resistor is added on the neutral line branch, the The second reverse diode, connected in series with the optocoupler, is used to control the conduction of the corresponding neutral line branch of the AC power supply according to the AC waveform; the target resistance, connected in parallel with the second reverse diode, is used for The impedance of the neutral branch is increased when the waveform is in the negative half axis.

To put it simply, the isolated optocoupler is protected by the second reverse diode. When the voltage applied to the input end of the optocoupler is greater than the turn-on voltage corresponding to the reverse diode, the first line between the neutral line branch and the live line branch is The second reverse diode is turned on. At this time, the live line branch of the AC power supply is directly connected to the neutral line branch, so that the light emitting diode can avoid excessive reverse voltage.

For example, when the AC power corresponding to the AC power supply is in the negative half-axis, the AC current flows through the reverse protection diode D1, and the tube voltage drop of the reverse protection diode D1 is less than the on-voltage U0; while the light-emitting diode in the isolation optocoupler can withstand the maximum The reverse voltage U2 is much larger than U0, so it plays a protective role.

Optionally, the above-mentioned low power consumption detection circuit further includes: a current limiting resistor 26, wherein the current limiting resistor is connected in series with the flash switch and the optocoupler, respectively, for reducing the AC power input to the the current of the low power consumption detection circuit, wherein the reduction is used to indicate that the first current input by the AC power supply is limited to the second current.

Optionally, the above-mentioned current-limiting resistors include: a first current-limiting resistor 2602 and a second current-limiting resistor 2604 having the same resistance value as the first current-limiting resistor; wherein the first current-limiting resistor and the first current-limiting resistor Two current limiting resistors are respectively arranged on the live wire branch and the neutral wire branch corresponding to the AC power supply. Optionally, the first current limiting resistor can be arranged on the live wire branch corresponding to the AC power supply; The second current limiting resistor is arranged on the neutral line branch corresponding to the AC power supply, and the second current limiting resistor can also be arranged on the live line branch corresponding to the AC power supply; the first current limiting resistor is arranged on the On the neutral branch corresponding to the AC power supply.

Optionally, the above-mentioned optocoupler includes: a light-emitting diode; wherein, the light-emitting diode is used to emit light after the second current input at the input end of the optocoupler is greater than or equal to a preset working current, and the preset working current The current is the lowest current at which the light-emitting diode enters the light-emitting state.

It should be noted that the positive and negative directions of the light-emitting diodes in the optocoupler determine the direction of the second reverse diode and the first reverse diode in the circuit. After determining the positive and negative directions of the light-emitting diodes in the optocoupler , the positive and negative directions of the first reverse diode in parallel with the optocoupler are opposite to the positive and negative directions of the light-emitting diode; the positive and negative directions of the second reverse diode in series with the optocoupler are opposite to the positive and negative directions of the light-emitting diode. , the negative direction is the same.

Optionally, the above-mentioned optocoupler further includes: a phototransistor; wherein, the phototransistor is used to enter a conducting state when the base of the phototransistor receives the light emitted by the light-emitting diode, and output The phototransistor is at a preset low level in an on state; or enters an off state after it is determined that the light emitting diode does not enter a light-emitting state, and outputs a preset high level of the phototransistor in an off state.

Optionally, the above-mentioned optocoupler further includes: a peripheral circuit; wherein, the peripheral circuit includes: a third resistor and a first capacitor; the third resistor is connected to the collector of the phototransistor, and is used for loading on the The preset voltage of the collector is divided to obtain a third voltage loaded to the collector of the phototransistor; the first capacitor, connected in parallel with the phototransistor, is used to provide a fourth voltage for the phototransistor Voltage.

Optionally, the above control circuit includes: a processor and a drive circuit; wherein, the processor is configured to receive a level signal output by the optocoupler, and detect whether the AC power supply flashes or not according to the level signal ; the drive circuit is connected to the processor, and is configured to generate a control signal for controlling the load when the processor determines that the AC power supply is flashed off.

For example, when the processor determines that the level signal output by the optocoupler is the same frequency as the mains, it means that the power supply is normal; when the processor determines that the voltage signal is a continuous high level, and the duration exceeds the preset time , it means that the power supply has flashed. That is, when the switch in the circuit is in the normally closed state, before the switch is activated, since the circuit is connected to the commonly used mains voltage, the frequency of the level signal output by the low-power detection circuit under normal conditions of the circuit is the same as the mains voltage. frequency, and then when the AC power supply is abnormally disconnected, the low power consumption detection circuit will detect the AC power disconnection, and the output level signal is a stable high level. When the processor finds that the high level carried in the level signal exceeds the When the preset time is set, the flashing interruption of the alternating current at this time is described. Further, the micro-control unit in the processor generates a corresponding control signal according to the occurrence of the flashing interruption, so as to control the state of the load.

Optionally, there are multiple processing methods for the processor; for example, the processor outputs a driving signal and sends it to the driving circuit through the wireless communication unit, so that the state of the load is reversed. When the time interval of high level or low level is less than TO, it is considered that there is no AC power supply without flashing; and when the time interval of high level or low level is greater than or equal to TO, it is considered that the AC power supply has flashing. ; When the AC power supply flashes, the state of the corresponding load will be reversed after being controlled by the control signal.

Optionally, the control circuit further includes: a communication circuit, the communication circuit is connected in series with the processor, for establishing a communication channel between the driving circuit and the processor according to a preset communication mode, to The drive signal present in the processor is sent to the drive circuit through the communication channel.

As an optional implementation manner, the implementation of the present invention also provides an electronic device, wherein the electronic device is composed of the above-mentioned low power consumption detection circuit, a load and a flash switch, and the low power consumption detection circuit and flash The switch can control the running state of the load. Optionally, the load in the present invention can be a lamp or other devices that consume electrical energy. In this regard, the present invention does not make too many limitations.

Optionally, the above electronic device further includes: a load unit and a load control unit, wherein the load control unit controls the load unit according to the detected signal corresponding to the flashing state in the circuit. It should be noted that the load unit includes but is not limited to a motor and an LED, and the electronic device includes but is not limited to a lamp, a fan, a Yuba, and the like.

As an optional implementation manner, the implementation of the present invention also provides a control system for an electronic device, which in addition to the electronic device, further includes: a flash switch, wherein an input end of the flash switch is connected in series with an AC power supply, The output end of the flash switch is connected in series with the electronic device, and is used to control the on-off of the AC power supply and the electronic device according to the state change of the flash switch.

That is, the input terminal of the flash switch is connected in series with the AC power source, and the output terminal of the flash switch is connected in series with the electronic device, and then the AC power source and the electronic device can be switched on and off according to the state change of the flash switch.

Optionally, the above-mentioned flash switch can be a self-rebound switch; the connection of the AC power supply in the circuit is controlled by the above-mentioned switch. The above flash switch is closed under normal conditions. When the AC power supply is abnormal or the switch is actuated by external force, the target power supply disconnects the input to the low power consumption detection circuit, and then the AC power is disconnected (ie, flash disconnection). .

It should be noted that the above-mentioned flash switch, current-limiting resistor, and reverse diode are similar components of any type that can be used to achieve the functional requirements of the present invention, and the models of the above-mentioned flash switch, current-limiting resistor, and reverse diode are based on actual It is selected according to production needs, and can be flexibly adjusted according to the actual application of the low power consumption detection circuit, which is not limited in the present invention.

In order to better understand the principle of the above-mentioned low-power consumption detection circuit, the implementation of the above-mentioned low-power consumption detection circuit is described below with reference to optional embodiments, but is not intended to limit the technical solutions of the embodiments of the present invention.

It should be noted that FIG. 3 is a working diagram of a flash-off detection circuit in the related art, and the working state of the electrical equipment is controlled by detecting the flash-off signal sent by the power-off detection circuit to the flash-off switch. Among them, when the flash switch 1 is pressed by an external force to disconnect the connection with the external power supply 4, so that the connection between the external power supply 4 and the electrical load 5 is interrupted, at this time, the power failure detection circuit 2 performs flash detection on the current circuit, and will detect The result is synchronized to the controller 3, and the controller controls the working state of the electrical equipment (ie, the electrical load 5).

4 is a schematic structural diagram of an isolated flash detection circuit in the related art; the isolated flash detection circuit includes: a zero-crossing comparison module, an output resistor R ₀ , a discharge capacitor C _i , an isolated optocoupler OC and a switch detection module, the circuit The structure is more complicated, and the cost of components is high. Therefore, the application is limited in cost and the scope of application is limited;

In order to reduce the cost and power consumption of components, the present invention proposes a low-power flash-off state detection circuit. FIG. 5 is a schematic circuit diagram of a low-power flash-off state detection circuit according to an optional embodiment of the present invention;

Specifically, in a practical application scenario, the above-mentioned low power consumption flash-off state detection circuit may include: a flash-off switch S ₁ , a first current limiting resistor R ₁ , a second current limiting resistor R ₂ , a reverse protection diode D ₁ and a light The coupling U ₁ , the reverse protection diode D ₂ , and the large-value resistor R ₄ ; the above is just an example, and does not limit the circuit of the present application.

Optionally, the flash switch S ₁ , the first current limiting resistor R ₁ , the optocoupler, and the second current limiting resistor R ₂ are connected in series between the live line L and the neutral line N of the mains in sequence, and the reverse protection diode D1 is reversed. It is connected in parallel between the two input ports of the optocoupler U1. Add a reverse diode D2 and a large resistance resistor R ₄ in parallel with the negative half-axis of the alternating current. When the alternating current is in the negative half-axis, the alternating current passes through L through S ₁ , R ₁ , D ₁ , R ₄ (the impedance is very large), R ₂ to N line; because R ₄ has a large impedance, the power dissipation is low when the AC is in the negative half axis. It ensures the normal operation of the positive half shaft and the reduction of power consumption of the negative half shaft.

Optionally, FIG. 6 is a schematic diagram of a waveform of a low-power flash-off state detection circuit according to an optional embodiment of the present invention without flash-off; wherein, the I waveform is: the AC power of the low-power flash-off state detection circuit corresponding to the input terminal. Waveform; II waveform is: the waveform output by the low-power flash-off state detection circuit when no flash-off occurs; it should be noted that the normal state of the flash-off switch in Figure 6 is closed, so the low-power flash-off state The detection circuit (ie, the low power consumption detection circuit) can detect the rectangular wave signal of the same frequency as the alternating current.

Optionally, FIG. 7 is a schematic diagram of a waveform of a flash-off in a low-power flash-off state detection circuit according to an optional embodiment of the present invention; when the flash-off switch in the low-power flash-off state detection circuit is pressed, the The circuit will detect the AC disconnection, and the output waveform is shown in Figure 7. Among them, the I waveform is: when there is a flash, the low-power flash state detection circuit corresponds to the AC waveform of the input terminal. The horizontal line is the period of the flash. During this period, the AC power supply is disconnected from the low-power flash state detection circuit, and there is no input voltage; the II waveform is: the waveform output by the low-power flash state detection circuit when a flash occurs; further, control the The device can judge the circuit abnormality according to the rectangular wave signal output by the isolated flash detection circuit, so it can be judged that a flash switching action has occurred.

Optionally, when the controller judges that a flash switch has acted, it will output a drive signal to the electrical load to reverse the state of the electrical load; for example, when the electrical load in the circuit is a lamp , the light is on before the switch action in the AC power supply, the flash operation after the switch action is determined by the flash detection circuit, and the corresponding waveform diagram is output, and then the controller outputs the driving signal for controlling the electrical load according to the acquired waveform diagram, driving the The circuit controls the display of the lamp according to the driving signal. When the lamp is on before the flashing operation, the lamp will turn from on to off after the flashing operation occurs; vice versa, the lamp is off before the switch action, and the flashing off occurs after the switch action. In the case of operation, the light will turn from off to on.

As an optional embodiment, the working principle corresponding to FIG. 5 will now be described in detail. When the alternating current is in the positive half-axis period, after passing through the light-emitting diodes of R1, U1 optocoupler, R2 and D2 (without passing through R4), When the current exceeds the working current of U1, U1 works, the light-emitting diode in the optocoupler works, and the transistor in the optocoupler is in a conducting state. At this time, the "Smart detection output is low level; When the diode current is less than the working current, the optocoupler is in the off state (that is, the phototransistor in the optocoupler is in the off state), and the transistor in the optocoupler is in the off state at this time, and the "smart detection output is high";

It should be noted that when the alternating current is in the negative half axis, the alternating current passes through L through S1, R1, D1, R4 (high impedance), R2 to the N line; because the impedance of R4 is very large, when the alternating current is in the negative half axis , the power consumption is very low (P=U2/(R1+RD1+R4)); this ensures the normal operation of the positive half shaft and the reduction of the power consumption of the negative half shaft;

Optionally, the low-power flash state detection circuit continuously outputs the level signal to control the state of the load, including: when the time interval between the high level or the low level in the level signal is less than TO, it is considered that there is no flash. Switch action; when the time interval of high level or low level is greater than or equal to TO, it is considered that there is a flash switch action; when there is a flash switch action, the state of the corresponding lamp will be reversed;

Optionally, D1 in Figure 5 plays the role of protecting and isolating the optocoupler; that is, when the AC current is in the negative half axis, the AC current flows through D1, and the tube voltage drop of D1 is less than U0; and the light-emitting diode of the optocoupler can withstand the maximum The reverse voltage U2 is much larger than U0, so it plays a protective role.

Through the above embodiment, the low power consumption detection circuit is used to detect the flash interruption of the AC power supply in real time, and the circuit structure of the low power consumption detection circuit is simple, the component cost is low, and the flash interruption detection accuracy is high. The power consumption circuit is used to make the low power consumption detection circuit work normally when the AC waveform is in the negative half axis. When the AC waveform is in the negative half axis, the power consumption circuit is used to expand the impedance in the low power consumption detection circuit to control the negative half axis Power consumption is reduced. The above technical solution solves the problems of high cost and high power consumption of the detection circuit in the related art. The embodiment of the present invention can realize the accuracy of the flash detection of the circuit, and reduce the occurrence of the failure of the flash detection. Reduce the overall power consumption of the overall detection.

FIG. 8 is a structural diagram of an electronic device according to an embodiment of the present invention; as shown in FIG. 8 , it includes: a low power consumption detection circuit 72 ; and further includes: a load unit 76 and a load control unit 74 , wherein the load control unit is based on The detected signal corresponding to the flash-off state in the circuit controls the flash-off switch of the load unit.

Optionally, the above-mentioned low power consumption detection circuit 72 includes: a power consumption circuit, an optocoupler, and a control circuit; the power consumption circuit is used for correspondingly increasing the power consumption between the AC power supply and the optocoupler according to the change of the AC waveform. The impedance of the live line branch or the neutral line branch; the optocoupler, connected in series with the power dissipation circuit, is used to compare the first current input at the input end of the optocoupler with the preset corresponding to the optocoupler. The magnitude of the working current is set, and a level signal is output according to the comparison result; the control circuit is connected to the output end of the optocoupler, and is used for detecting whether the AC power supply flashes or not according to the level signal.

9 is a structural diagram of a control system of an electronic device according to an embodiment of the present invention; as shown in FIG. 9 , it not only includes the above electronic device, but also includes a flash switch 80 , wherein the input end of the flash switch is connected in series with AC A power supply, the output end of the flash switch is connected in series with the electronic device, and is used to control the on-off of the AC power supply and the electronic device according to the state change of the flash switch.

Optionally, the above-mentioned control system further includes: a display module, connected to the output end of the electronic device, for performing a corresponding visual display on the level signal output by the low power consumption detection circuit; wherein, the visual display is used to indicate according to the The level signal corresponds to the output detection result. For example, when the phototransistor is in an on state, the display detection output is a low level; when the phototransistor is in an off state, the display detection output is a high level.

In the embodiment of the present invention, the above-mentioned control system performs real-time detection on the flash interruption of the AC power supply through the low-power consumption detection circuit, and the circuit structure of the above-mentioned low-power consumption detection circuit is simple, the component cost is low, and the flash interruption detection accuracy is high. In addition, by referring to the power consumption circuit, the low power consumption detection circuit works normally when the AC waveform is in the negative half axis, and when the AC waveform is in the negative half axis, the power consumption circuit is used to expand the impedance in the low power consumption detection circuit to The power consumption of controlling the negative half shaft is reduced. The above technical solution solves the problems of high cost and high power consumption of the detection circuit in the related art. The embodiment of the present invention can realize the accuracy of the flash detection of the circuit, and reduce the occurrence of the failure of the flash detection. Reduce the overall power consumption of the overall detection.

FIG. 10 is a flowchart of a method for detecting a flash state according to an embodiment of the present invention; as shown in FIG. 10 , the method includes:

Step S902: Determine the digital signal corresponding to the AC power output by the low power consumption detection circuit, wherein the digital signal is the first input by the optocoupler in the low power consumption detection circuit by comparing the input terminal of the optocoupler. a current and a preset operating current output level signal corresponding to the optocoupler;

Step S904: Determine whether the AC power supply flashes off by using the digital signal.

Through the above steps, the digital signal corresponding to the AC power output by the low power consumption detection circuit is determined, wherein the digital signal is the input of the optocoupler in the low power consumption detection circuit by comparing the input terminal of the optocoupler The first current corresponds to the preset working current output level signal of the optocoupler; whether the AC power supply flashes is determined by the digital signal. That is, the low power consumption detection circuit is used to detect the flash break of the AC power supply in real time, and the circuit structure of the low power consumption detection circuit is simple, the component cost is low, and the flash break detection accuracy is high. In addition, by citing the power consumption circuit The low power consumption detection circuit can work normally when the AC waveform is in the negative half axis, and when the AC waveform is in the negative half axis, the power consumption circuit is used to expand the impedance in the low power consumption detection circuit to control the power consumption of the negative half axis to decrease. The above technical solution solves the problems of high cost and high power consumption of the detection circuit in the related art. The embodiment of the present invention can realize the accuracy of the flash detection of the circuit, and reduce the occurrence of the failure of the flash detection. Reduce the overall power consumption of the overall detection.

FIG. 11 is a flash detection control device according to an embodiment of the present invention; as shown in FIG. 11 , it includes:

The detection module 1002 is used to determine the digital signal corresponding to the AC power output by the low power consumption detection circuit, wherein the digital signal is the optical coupler in the low power consumption detection circuit by comparing the input terminal of the optocoupler. the input first current and the preset operating current output level signal corresponding to the optocoupler;

The control module 1004 is configured to determine whether the AC power supply flashes off through the digital signal.

Through the above device, the digital signal corresponding to the AC power output by the low power consumption detection circuit is determined, wherein the digital signal is the input of the optocoupler in the low power consumption detection circuit by comparing the input terminal of the optocoupler The first current corresponds to the preset working current output level signal of the optocoupler; whether the AC power supply flashes is determined by the digital signal. That is, the low power consumption detection circuit is used to detect the flash break of the AC power supply in real time, and the circuit structure of the low power consumption detection circuit is simple, the component cost is low, and the flash break detection accuracy is high. In addition, by citing the power consumption circuit The low power consumption detection circuit can work normally when the AC waveform is in the negative half axis, and when the AC waveform is in the negative half axis, the power consumption circuit is used to expand the impedance in the low power consumption detection circuit to control the power consumption of the negative half axis to decrease. The above technical solution solves the problems of high cost and high power consumption of the detection circuit in the related art. The embodiment of the present invention can realize the accuracy of the flash detection of the circuit, and reduce the occurrence of the failure of the flash detection. Reduce the overall power consumption of the overall detection.

FIG. 12 is a flowchart of a control method of an electronic device according to an embodiment of the present invention; as shown in FIG. 12 , it includes:

Step S1102: Supporting the electronic device to be in a continuous online state based on the flash-off state detection method, wherein the continuous-on-line state is to ensure that the electronic device is in a flash-off state through a flash-off state detection circuit in the case of a flash-off of the AC power supply The power supply of the control circuit;

Step S1104: When it is determined that the electronic device is in the continuous online state, perform remote control of the electronic device through the control circuit.

It should be noted that, even if the electronic device flashes and the power supply is stopped, the control circuit used for remote control in the electronic device can still maintain normal operation, so that the electronic device can send information to the control terminal. The remote control performs an effective response, which solves the problems in the related art that the flash detection method is prone to failure and low accuracy. Through the participation of remote control, the occurrence of flash detection failures is reduced, thereby ensuring the safe and effective operation of electronic devices.

Optionally, for specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiments and optional implementation manners, and details are not described herein again in this embodiment.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device, which can be centralized on a single computing device, or distributed in a network composed of multiple computing devices Alternatively, they may be implemented in program code executable by a computing device, such that they may be stored in a storage device and executed by the computing device, and in some cases, in a different order than here The steps shown or described are performed either by fabricating them separately into individual integrated circuit modules, or by fabricating multiple modules or steps of them into a single integrated circuit module. As such, the present invention is not limited to any particular combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention shall be included within the protection scope of the present invention.

Claims (16)

1. A low power consumption detection circuit is applied to the detection of a flash-off state in a circuit, and is characterized by comprising: a power consumption circuit, an optical coupler and a control circuit;

the power consumption circuit is used for correspondingly increasing the impedance of a live wire branch or a zero line branch between an alternating current power supply and the optocoupler according to the change condition of the alternating current waveform;

the optical coupler is connected with the power consumption circuit in series and used for comparing a first current input at the input end of the optical coupler with a preset working current corresponding to the optical coupler and outputting a level signal according to a comparison result;

and the control circuit is connected with the output end of the optocoupler and used for detecting whether the alternating current power supply is in flash break or not according to the level signal.

2. The low power detection circuit of claim 1, further comprising: a first backward diode;

the first backward diode is used for determining whether to conduct or not based on the current alternating current waveform corresponding to the alternating current power supply.

3. The low power consumption detection circuit of claim 1, wherein the power consumption circuit comprises: a second backward diode, a target resistance;

the second backward diode is connected with the optocoupler in series and used for controlling the conduction condition of the corresponding live wire branch or zero line branch of the alternating current power supply according to the alternating current waveform;

the target resistor is connected in parallel with the second backward diode and used for increasing the impedance of the live wire branch or the zero wire branch under the condition that the second backward diode is not conducted.

4. The low power consumption detection circuit according to claim 1, wherein the low power consumption detection circuit further comprises: a current-limiting resistor is connected with the power supply,

the current limiting resistor is respectively connected with the flash switch and the optocoupler in series and used for reducing the current input into the low-power consumption detection circuit by the alternating current power supply, wherein the reduction is used for indicating that the first current input by the alternating current power supply is limited to be the second current.

5. The low power consumption detection circuit of claim 4, wherein the current limiting resistor comprises: the current limiting circuit comprises a first current limiting resistor and a second current limiting resistor, wherein the resistance value of the first current limiting resistor is the same as that of the second current limiting resistor; the first current-limiting resistor and the second current-limiting resistor are respectively arranged on a live wire branch circuit and a zero wire branch circuit corresponding to the alternating current power supply.

6. The low power detection circuit of claim 1, wherein the optocoupler comprises: a light emitting diode;

the light emitting diode is used for emitting light after a second current input by the input end of the optocoupler is greater than or equal to a preset working current, and the preset working current is the lowest current of the light emitting diode entering a light emitting state.

7. The low power detection circuit of claim 6, wherein the optocoupler further comprises: a photo transistor;

the phototriode is used for entering a conducting state under the condition that the base electrode of the phototriode receives light rays emitted by the light emitting diode, and outputting a preset low level of the phototriode in the conducting state; or after the light emitting diode is determined not to be in the light emitting state, the light emitting diode enters a cut-off state, and the preset high level of the phototriode in the cut-off state is output.

8. The low power detection circuit of claim 7, wherein the optocoupler further comprises: a peripheral circuit; wherein the peripheral circuit comprises: a third resistor and a first capacitor;

the third resistor is connected with the collector of the phototriode and used for dividing the preset voltage loaded on the collector to obtain a third voltage loaded on the collector of the phototriode;

the first capacitor is connected with the phototriode in parallel and used for providing fourth voltage for the phototriode.

9. The low power detection circuit of claim 1, wherein the control circuit comprises: a processor and a drive circuit; wherein,

the processor is used for receiving a level signal output by the optocoupler and detecting whether the alternating current power supply is in flash break or not according to the level signal;

and the driving circuit is connected with the processor and used for generating a control signal for controlling the load under the condition that the processor determines that the alternating current power supply is subjected to flash interruption.

10. An electronic device comprising the low power consumption detection circuit of any one of claims 1 to 9.

11. The electronic device of claim 10, further comprising: the load control unit controls the load unit according to a signal corresponding to the detected flash-off state in the circuit.

12. A control system of an electronic device, characterized by comprising the electronic device of any one of claims 10 to 11.

13. The control system of the electronic device according to claim 12, further comprising: the input end of the flash switch is connected with an alternating current power supply in series, and the output end of the flash switch is connected with the electronic device in series and used for controlling the on-off of the alternating current power supply and the electronic device according to the state change of the flash switch.

14. A flash status detection method, comprising:

determining a digital signal corresponding to an alternating current power supply output by a low-power-consumption detection circuit, wherein the digital signal is a preset working current output level signal corresponding to an optical coupler by comparing a first current input at an input end of the optical coupler in the low-power-consumption detection circuit;

and determining whether the alternating current power supply is in flash-off or not through the digital signal.

15. An apparatus for detecting and controlling flash, comprising:

the detection module is used for determining a digital signal corresponding to an alternating current power supply output by a low-power-consumption detection circuit, wherein the digital signal is a level signal output by an optical coupler in the low-power-consumption detection circuit by comparing a first current input at an input end of the optical coupler with a preset working current corresponding to the optical coupler;

and the control module is used for determining whether the alternating current power supply is in flash through the digital signal.

16. A control method of an electronic device to which the flash status detection method according to claim 14 is applied, comprising:

supporting the electronic device to be in a continuous online state based on the flash state detection method, wherein the continuous online state is that power supply of a control circuit of the electronic device is ensured under the condition that the alternating current power supply flashes through a flash state detection circuit;

performing, by the control circuit, remote control of the electronic device if it is determined that the electronic device is in the continuously online state.

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