Power supply control circuit, detection device, countering device and electronic device

Abstract

The invention relates to a power supply control circuit, a detection device, a countering device and an electronic device. The power supply control circuit comprises a main control module which outputs a state feedback signal according to an operation state. The power management module is connected with the power equipment and the main control module, and the power management module is used for converting power voltage of the power equipment into power supply voltage and outputting the power supply voltage to the main control module. And the switching circuit is respectively connected with the power supply equipment, the power supply management module and the main control module, and is used for controlling the power supply management module to stop outputting the power supply voltage under the condition that the state feedback signal does not reach the preset standard, so that the main control module is powered off. And the switching circuit is also used for controlling the power management module to output the power supply voltage again according to the received power supply voltage after the power management module is controlled to stop working, so that the main control module is restarted. By implementing the embodiment of the invention, power-off reset can be realized without manual adjustment, and convenience and practicability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of power-off reset, and in particular, to a power control circuit, a detection device, a countermeasure device, and an electronic device. Background Art

[0002] In the related art, in order to avoid software crashes, a watchdog circuit is usually set to monitor the operating state of the central processing unit. When the software of the central processing unit crashes and cannot output a watchdog signal, the watchdog circuit automatically outputs a signal to the reset pin of the central processing unit to reset the central processing unit when it does not receive the watchdog signal on time.

[0003] In some unattended scenarios, when the unattended device has a program runaway or a program crash during operation, after the watchdog circuit resets the central processing unit through the reset pin, the central processing unit may switch to a non-operating state, resulting in the inability of the unattended device to work. It is necessary to manually readjust the device to make it work, thus unable to meet the usage requirements of this scenario. Summary of the Invention

[0004] Based on this, it is necessary to provide a power control circuit, a detection device, a countermeasure device, and an electronic device that can automatically reset the central processing unit after an exception occurs in the central processing unit.

[0005] In a first aspect, an embodiment of the present application provides a power control circuit, including:

[0006] A main control module, configured to output a status feedback signal according to the operating state;

[0007] A power management module, connected to a power device and the main control module respectively. The power management module is configured to convert the power voltage of the power device into a supply voltage and output it to the main control module;

[0008] A switching circuit, connected to the power device, the power management module, and the main control module respectively. The switching circuit is configured to control the power management module to stop outputting the supply voltage and cut off the power supply of the main control module when the status feedback signal does not meet a preset standard; the switching circuit is further configured to control the power management module to re-output the supply voltage and restart the main control module according to the received power voltage after controlling the power management module to stop working.

[0009] In one of the embodiments, the switching circuit includes:

[0010] A monitoring module, connected to the main control module, and outputting a first control signal when the status feedback signal does not meet a preset standard;

[0011] A control module, which is respectively connected to the power supply device, the power management module, and the monitoring module. When receiving the first control signal, it controls the power management module to stop outputting the power supply voltage, causing the main control module to lose power. The control module is further configured to, after controlling the power management module to stop working, control the power management module to re-output the power supply voltage according to the received power supply voltage, causing the main control module to restart.

[0012] In one embodiment, the control module includes:

[0013] A first control unit, which is respectively connected to the monitoring module and the power management module, and is configured to, when receiving the first control signal, convert the first control signal into a power supply stop signal, so that the power management module stops outputting the power supply voltage when receiving the power supply stop signal;

[0014] A second control unit, which is respectively connected to the power supply device and the power management module, and is configured to, when receiving the power supply voltage, generate a continuous power supply signal according to the power supply voltage, so that the power management module re-outputs the power supply voltage when receiving the continuous power supply signal.

[0015] In one embodiment, the monitoring module is further configured to output a second control signal when the status feedback signal reaches the preset standard. The first control unit includes:

[0016] A signal converter, which is respectively connected to the monitoring module and the power management module, and is configured to, when receiving the first control signal, convert the first control signal into the power supply stop signal; wherein, the level state of the power supply stop signal is opposite to the level state of the first control signal;

[0017] The signal converter is further configured to, when receiving the second control signal, convert the second control signal into the continuous power supply signal; wherein, the level state of the continuous power supply signal is opposite to the level state of the second control signal.

[0018] In one embodiment, the monitoring module is further configured to output a second control signal when the status feedback signal reaches the preset standard. The first control unit includes:

[0019] The first switch circuit, the first switch circuit includes a first control terminal, a first input terminal, a second input terminal and a first output terminal, the first control terminal is connected to the monitoring module, the first output terminal is connected to the power management module, the first input terminal is grounded, the second input terminal is connected to the power supply voltage, and the first switch circuit is configured to connect a first connection channel between the first input terminal and the first output terminal when receiving the first control signal, and the first connection channel outputs the power supply stop signal through the first output terminal;

[0020] The first switch circuit is further configured to connect a second connection channel between the second input terminal and the first output terminal when receiving the second control signal, and the second connection channel outputs the continuous power supply signal through the first output terminal according to the power supply voltage.

[0021] In one embodiment, the second control unit includes:

[0022] A switch, connected to the power supply device;

[0023] The second switch circuit, the second switch circuit includes a second control terminal, a third input terminal, a second output terminal and a third output terminal, the second control terminal and the third input terminal are connected to the switch, the second output terminal is connected to the power management module, and the third output terminal is floating;

[0024] The second switch circuit is configured to, when the switch is closed, after receiving the power supply voltage, connect a third connection channel between the third input terminal and the second output terminal according to the power supply voltage, and the third connection channel outputs the continuous power supply signal through the second output terminal;

[0025] The second switch circuit is further configured to, when the switch is open, connect a fourth connection channel between the third input terminal and the third output terminal, so that the second output terminal outputs the power supply stop signal.

[0026] In one embodiment, the main control module is further connected to the switch; the main control module is further configured to control the monitoring module to output the first control signal when detecting that the switch is in an open state.

[0027] In one embodiment, the main control module is further connected to the control module; the main control module is configured to control the monitoring module to output the first control signal when detecting that the control module is not connected to the power supply voltage.

[0028] In a second aspect, the present application also discloses an aircraft detection device, including:

[0029] The aircraft detection device includes the power control circuit as described in the first aspect.

[0030] In a third aspect, the present application also discloses an aircraft countermeasure device, including:

[0031] The aircraft countermeasure device includes the power control circuit as described in the first aspect.

[0032] In a fourth aspect, the present application also discloses an electronic device, including:

[0033] The electronic device includes the power control circuit as described in the first aspect.

[0034] In a fifth aspect, the present application also discloses an aircraft control system, including:

[0035] The aircraft control system includes the power control circuit as described in the first aspect;

[0036] Alternatively, the aircraft control system includes the aircraft detection device as described in the second aspect;

[0037] Alternatively, the aircraft control system includes the aircraft countermeasure device as described in the third aspect;

[0038] Alternatively, the aircraft control system includes the electronic device as described in the fourth aspect.

[0039] For the above power control circuit, aircraft detection device, aircraft countermeasure device, electronic device, and aircraft control system, the main control module detects its own operating state, and outputs a status feedback signal to the switching circuit according to its own operating state. The switching circuit monitors the obtained status feedback signal. When the status feedback signal does not reach the preset standard, it indicates that the main control module is in an abnormal state (such as program crash, program runaway). The switching circuit controls the power management module to stop outputting the supply voltage to the main control module, so that the main control module is powered off. After controlling the power management module to stop outputting the supply voltage to the main control module, when the switching circuit receives the power voltage, the switching circuit can control the power management module to re-output the supply voltage to the main control module, so that the main control module restarts. Therefore, in the embodiment of the present application, when the main control module is in an abnormal state, it can be automatically reset without manual adjustment, thus meeting the usage requirements of unattended operation. Description of the Drawings

[0040] To more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 It is the module structure of the power control circuit of an embodiment;

[0042] Figure 2 It is the module structure of the power control circuit of another embodiment;

[0043] Figure 3 It is the module structure of the power control circuit of another embodiment;

[0044] Figure 4 It is the circuit schematic diagram of the power control circuit of an embodiment;

[0045] Figure 5 It is the circuit schematic diagram of the power control circuit of another embodiment.

[0046] Description of reference numerals:

[0047] Power control circuit 100;

[0048] Main control module 101, switching circuit 102, power management module 103, power device 104;

[0049] Monitoring module 201, control module 202;

[0050] First control unit 301, second control unit 302. Detailed implementation manners

[0051] To facilitate the understanding of the present application, the following will describe the present application more comprehensively with reference to the relevant drawings. Embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0053] It can be understood that the terms "first", "second", etc. used in this application may be used herein to describe various components, but these components are not limited by these terms. These terms are only used to distinguish a first component from another component. For example, without departing from the scope of this application, the first control unit may be referred to as the second control unit, and similarly, the second control unit may be referred to as the first control unit. Both the first control unit and the second control unit are control units, but they are not the same control unit.

[0054] It can be understood that for "connection" in the following embodiments, if there is transmission of electrical signals or data between the connected circuits, modules, units, etc., it should be understood as "electrical connection", "communication connection", etc.

[0055] It can be understood that "at least one" means one or more, and "a plurality" means two or more. "At least part of an element" means part or all of the element.

[0056] As used herein, the singular forms "a", "an", and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise / include" or "have" etc. specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0057] When an unattended device is operating normally, the program may run away. The built-in watchdog circuit transmits a control signal to the central processing unit through a reset pin when the program runs away, causing the central processing unit to be reset. However, the central processing unit may be in a non-operating state after being reset, resulting in the inability of the unattended device to work, and it is necessary to manually readjust the device to make it work, thus making it inapplicable to the application requirements of the unattended scenario.

[0058] Based on this, the embodiments of this application provide optional examples of a power control circuit, a detection device, a countermeasure device, an electronic device, and an aircraft control system, which can be automatically reset without manual adjustment when the main control module is in an abnormal state, and can meet the usage requirements of unattended operation.

[0059] In an exemplary embodiment, such as Figure 1As shown in the figure, an embodiment of the present application provides a power control circuit 100, which includes a main control module 101, a switching circuit 102, and a power management module 103. The power control circuit 100 can be connected to a power supply device 104, and the power supply device 104 provides a DC power supply voltage, for example. The main control module 101 is used to output a status feedback signal according to the operating state. The power management module 103 is respectively connected to the power supply device 104 and the main control module 101, and the power management module 103 is used to convert the power supply voltage of the power supply device 104 into a supply voltage and then output it to the main control module 101. The switching circuit 102 is respectively connected to the power supply device 104, the power management module 103, and the main control module 101, and is used to control the power management module 103 to stop outputting the supply voltage when the status feedback signal does not reach the preset standard, so that the main control module 101 is powered off. The switching circuit 102 is also used to control the power management module 103 to re-output the supply voltage according to the received power supply voltage after controlling the power management module 103 to stop working, so that the main control module 101 is restarted.

[0060] Exemplarily, the power control circuit 100 can be applied to any electronic device that needs to use power, such as an unattended device, a drone countermeasure device, a frequency jammer, a communication device, etc. The main control module 101 can be a central processing unit (CPU, Central Processing Unit). The main control module 101 has functions such as monitoring, data analysis, and data processing, for example. If the power control circuit 100 is applied to an electronic device, the main control module 101 can realize unified management and control of the electronic device. For example, the main control module 101 can control the switching circuit 102 by outputting a control signal. Among them, the status feedback signal is one of the control signals, and the status feedback signal is a signal generated by the main control module 101 through its own operating state, and the status feedback signal can feedback the operating state of the main control module 101 to the switching circuit 102. In addition, the operating state of the main control module 101 can include a normal operating state and an abnormal operating state. The normal operating state can include the main control module 101 running the program normally or the program not crashing, etc. The abnormal operating state can include the program of the main control module 101 running wild or the program crashing, etc. In the embodiment of the present application, the operating state of the main control module 101 is not specifically limited. And, when the main control module 101 is in different operating states, the status feedback signals output by it are different. For example, the value of the status feedback signal is different, or the signal category of the status feedback signal is different. In short, as long as the status feedback signal can reflect the normal and abnormal states of the main control module 101, the specific form is not limited. For example, the main control module 101 can also output a signal when it is normal, and not output any signal when the main control module 101 is abnormal.

[0061] Exemplarily, the switching circuit 102 can identify the operating state of the main control module 101 according to the status feedback signal of the main control module 101, and control whether the power management module 103 transmits the supply voltage to the main control module 101. Among them, for example, the parameters of the status feedback signal are compared with the corresponding preset standards of the signal, and the operating state of the main control module 101 can be determined through the comparison result. For example: when the comparison result indicates that the parameters of the status feedback signal reach the preset standard, the operating state of the main control module 101 is normal; when the comparison result indicates that the parameters of the status feedback signal do not reach the preset standard, the operating state of the main control module 101 is abnormal.

[0062] Exemplarily, the parameters of the status feedback signal include any one of the following: phase, duty cycle, frequency, level value, current value, etc. The embodiments of the present application do not specifically limit the parameters of the status feedback signal. The preset standards include any one of the following: phase standard, duty cycle standard, frequency standard, level value standard, current value standard and other parameter standards. The embodiments of the present application do not specifically limit the preset standards. In addition, the phase of the status feedback signal is compared with the phase standard, the duty cycle of the status feedback signal is compared with the duty cycle standard, the frequency of the status feedback signal is compared with the frequency standard, the level value of the status feedback signal is compared with the level value standard, and the current value of the status feedback signal is compared with the current value standard. For example: the preset standard includes the current value standard. The current value of the status feedback signal is compared with the current value standard. If the current value of the status feedback signal is less than the current value standard (at this time, it is considered that the status feedback signal reaches the preset standard), it is determined that the operating state of the main control module 101 has not appeared abnormal. If the current value of the status feedback signal is greater than the current value standard, it is determined that the operating state of the main control module 101 has appeared abnormal (at this time, it is considered that the status feedback signal does not reach the preset standard). Or, it can also be: if it is determined that the current value of the status feedback signal is greater than or equal to the current value standard, it is considered that the status feedback signal reaches the preset standard. If the current value of the status feedback signal is less than the current value standard (including the case where no status feedback signal is output), it is considered that the status feedback signal does not reach the preset standard.

[0063] The power management module 103 is connected between the main control module 101 and the power supply device 104, having the function of voltage transmission, and also having the functions of regulating voltage and stabilizing voltage. The power management module 103 can perform operations such as voltage regulation and voltage stabilization on the power supply voltage provided by the power supply device 104 to obtain the supply voltage, and transmit the supply voltage to the main control module 101. Among them, the supply voltage is used to support the normal operation of the main control module 101. It can be understood that the power management module 103 can also output the supply voltage to other modules that need power supply, such as the switching circuit 102. The specific principle of the power management module 103 for processes such as voltage regulation and voltage stabilization can refer to the power management chips (such as voltage stabilizing chips) in the prior art, and will not be elaborated here.

[0064] The switching circuit 102 is used to control whether the power management module 103 outputs the supply voltage, that is, if the main control module 101 malfunctions, the switching circuit 102 controls the power management module 103 not to output the supply voltage. It should be noted that the switching circuit 102 only needs to control whether the power management module 103 outputs the supply voltage, and for whether the power management module 103 performs processes such as voltage conversion, it can be controlled or not. For example, if it is determined that the main control module 101 is abnormal, the switching circuit 102 can directly control the power management module 103 to stop working; or, it can also be that the switching circuit 102 only controls the output terminal of the power management module 103 not to output the supply voltage, and does not control other circuits inside the power management module 103. It should be noted that the switching circuit 102 can be implemented by hardware, or can also be implemented by software and algorithms in a chip (such as a processor), and these are all within the protection scope of this application.

[0065] Exemplarily, when the power control circuit 100 is applied to an electronic device, the power supply device 104 can be used as the power supply for the electronic device. The power supply device 104 is used to provide the power supply voltage for the entire electronic device. For example, it provides voltage for the operation of the main control module 101, the switching circuit 102, the power management module 103, etc. The above-mentioned power supply device 104 can be an external power supply, an adapter, a battery and other devices, and is not limited here.

[0066] In this embodiment, when an abnormal condition such as the main control module 101 crashing or the running program going haywire occurs, the operating state of the main control module 101 is in an abnormal state, and the main control module 101 outputs a status feedback signal corresponding to the abnormal state. The switching circuit 102 compares the status feedback signal with a preset standard, that is, determines that the status feedback signal does not reach the preset standard, and then the switching circuit 102 controls the power management module 103 to stop outputting the supply voltage to the main control module 101, so that the main control module 101 shuts down. After the main control module 101 shuts down, the switching circuit 102 can still receive the power voltage provided by the power device 104, and then controls the power management module 103 to transmit the supply voltage to the main control module 101 again, and the main control module 101 restarts after receiving the supply voltage.

[0067] Therefore, when the power control circuit 100 provided in this embodiment is applied to an unattended device, when the main control module 101 encounters an abnormal condition, it can control the main control module 101 to shut down and then restart after a short period of time through the power management module 103 and the switching circuit 102, so that the main control module 101 can automatically re-enter the working state when an abnormal condition occurs, without the need for manual operation. Therefore, precisely because this embodiment does not require manual repair, it can solve the problem that an unattended device needs manual repair when an abnormal condition occurs, and meet the application requirements of unattended devices.

[0068] In an exemplary embodiment, as Figure 2 shown, the switching circuit 102 provided in the embodiment of the present application includes a monitoring module 201 and a control module 202.

[0069] The monitoring module 201 is connected to the main control module 101 and outputs a first control signal when the status feedback signal does not reach the preset standard.

[0070] The control module 202 is respectively connected to the power device 104, the power management module 103, and the monitoring module 201. When receiving the first control signal, it controls the power management module 103 to stop outputting the supply voltage, so that the main control module 101 loses power. The control module 202 is also used to control the power management module 103 to re-output the supply voltage according to the received power voltage after controlling the power management module 103 to stop working, so that the main control module 101 restarts.

[0071] Among them, the monitoring module 201 is used to determine whether the operating state of the main control module 101 is abnormal according to the detected status feedback signal. The monitoring module 201 is also used to generate and output a control signal to the control module 202 according to the detected operating state of the main control module 101. Specifically, the monitoring module 201 compares the status feedback signal with a preset standard, determines the operating state of the main control module 101 according to the comparison result, and generates and outputs a corresponding control signal to the control module 202 according to the operating state of the main control module 101. Among them, the control signal generated by the monitoring module 201 corresponds to the operating state of the main control module 101.

[0072] In addition, the monitoring module 201 may include a watchdog circuit, which is a timer circuit widely used in embedded systems and is used to detect and handle system anomalies to ensure that the system can restart in a timely and stable manner. For example: the status feedback signal includes a signal representing that the main control module 101 outputs a watchdog signal and a signal representing that the main control module 101 does not output a watchdog signal. The status feedback signal reaching the preset standard can be understood as the main control module 101 outputting a watchdog signal within a preset time range, and the status feedback signal not reaching the preset standard can be understood as the main control module 101 not outputting a watchdog signal within a preset time range.

[0073] In the case that the monitoring module 201 does not receive a watchdog signal within a preset time range, it means that the status feedback signal does not reach the preset standard, and the operating state of the main control module 101 is abnormal. The monitoring module 201 generates and outputs a first control signal. In the case that the monitoring module 201 receives a watchdog signal within a preset time range, it means that the status feedback signal reaches the preset standard, and the operating state of the main control module 101 is not abnormal, and a second control signal is generated and output. The first control signal and the second control signal are different. For example, one is a low level and the other is a high level, or it can also be that their currents are different.

[0074] The control module 202 controls whether the power management module 103 transmits the supply voltage to the main control module 101 according to the control signal output by the monitoring module 201. The control module 202 also controls the power management module 103 to transmit the supply voltage to the main control module 101 according to the power voltage output by the power device 104. Specifically, the control module 202 can control the power management module 103 by outputting a control signal. For example: after receiving the control signal output by the monitoring module 201, the control module 202 converts the control signal output by the monitoring module 201 into a control signal for controlling the power management module 103. After receiving the power voltage output by the power device 104, the control module 202 can convert the power voltage into a control signal for the power management module 103 to transmit the supply voltage.

[0075] When the monitoring module 201 detects that the operating state of the main control module 101 is abnormal, it outputs a first control signal. The control module 202 converts the first control signal into a control signal for controlling the power management module 103 to stop outputting the power supply voltage, so that the power management module 103 stops outputting the power supply voltage to the main control module 101, and the main control module 101 shuts down. After the main control module 101 shuts down, since the power supply device 104 still outputs the power supply voltage to the control module 202, the control module 202 converts the power supply voltage into a control signal for controlling the power management module 103 to output the power supply voltage, so as to control the power management module 103 to output the power supply voltage to the main control module 101 again, making the main control module 101 restart. Therefore, in this embodiment, when the working state of the main control module 101 is abnormal, under the control of the monitoring module 201, the control module 202 and the power management module 103, the main control module 101 can be shut down and restarted, so that the main control module 101 can re-enter the normal operating state, improving the stability of the automatic power-off reset of the main control module 101, and enhancing the convenience and practicability of the device.

[0076] In an exemplary embodiment, as Figure 3 shown, the control module 202 includes: a first control unit 301 and a second control unit 302. The first control unit 301 is respectively connected to the monitoring module 201 and the power management module 103. The first control unit 301 is configured to convert the first control signal into a power supply stop signal when receiving the first control signal, so that the power management module 103 stops outputting the power supply voltage when receiving the power supply stop signal.

[0077] The second control unit 302 is respectively connected to the power supply device 104 and the power management module 103, and is configured to generate a continuous power supply signal according to the power supply voltage after the power management module 103 stops working and when receiving the power supply voltage, so that the power management module 103 outputs the power supply voltage again when receiving the continuous power supply signal.

[0078] Among them, the first control unit 301 is used to control whether the power management module 103 outputs the power supply voltage according to the control signal output by the monitoring module 201. The first control unit 301 can output a corresponding control signal according to the control signal output by the monitoring module 201. For example: the first control unit 301 outputs a power supply stop signal according to the first control signal output by the monitoring module 201.

[0079] Optionally, the first control unit 301 selects and outputs a corresponding control signal according to the received control signal, or the first control unit 301 processes the control signal output by the monitoring module 201 to obtain a corresponding control signal. Moreover, the signal processing methods may include signal amplification, signal inversion, signal operation, etc., and the embodiments of the present application do not specifically limit the signal processing methods.

[0080] When the monitoring module 201 detects that the operating state of the main control module 101 is abnormal, the first control unit 301 receives the first control signal output by the monitoring module 201, and the first control unit 301 outputs a power supply stop signal to the power management module 103 according to the first control signal, so that the power management module 103 stops working and the main control module 101 shuts down. When the monitoring module 201 detects that the operating state of the main control module 101 is normal, the first control unit 301 receives the second control signal output by the monitoring module 201, and the first control unit 301 outputs a continuous power supply signal according to the second control signal, so that the power management module 103 keeps working and the main control module 101 operates normally. Among them, the power supply stop signal is used to control the power management module 103 to stop outputting the power supply voltage, and the continuous power supply signal is used to control the power management module 103 to output the power supply voltage.

[0081] The second control unit 302 is used to control the power management module 103 to output the power supply voltage according to the power supply voltage of the power device 104. Specifically, the second control unit 302 may output a corresponding control signal according to the power supply voltage of the power device 104, so that the power management module 103 outputs the power supply voltage.

[0082] Optionally, the second control unit 302 selects and outputs a corresponding control signal according to the received situation of the power supply voltage, or processes the power supply voltage of the power device 104 to obtain a corresponding control signal. For example: when the second control unit 302 receives the power supply voltage of the power device 104, it outputs a continuous power supply signal, and when the second control unit 302 does not receive the power supply voltage of the power device 104, it outputs a power supply stop signal.

[0083] After the first control unit 301 controls the power management module 103 to stop outputting the power supply voltage, since the second control unit 302 can still receive the power supply voltage of the power device 104, the second control unit 302 outputs a continuous power supply signal according to the power supply voltage of the power device 104, so that the power management module 103 works again and the main control module 101 restarts.

[0084] In an exemplary embodiment, the power management module 103 is configured to operate when receiving a high-level signal, that is, convert the power supply voltage of the power supply device 104 into a supply voltage and output the supply voltage to the main control module 101. The power management module 103 is further configured to stop operating when receiving a low-level signal, that is, stop converting the power supply voltage into a supply voltage and stop outputting the supply voltage to the main control module 101.

[0085] Optionally, the power supply stop signal may be a low-level signal, that is, the level of the power supply stop signal may be low. When the first control unit 301 receives the first control signal, it converts the first control signal into a low-level signal and outputs the low-level signal to the power management module 103, causing the power management module 103 to stop converting the power supply voltage into a supply voltage. When the second control unit 302 does not receive the power supply voltage of the power supply device 104, it outputs a low-level signal, causing the power management module 103 to stop converting the power supply voltage into a supply voltage when receiving the low-level signal.

[0086] Optionally, the continuous power supply signal may be a high-level signal, that is, the level of the continuous power supply signal may be high. When the first control unit 301 receives the second control signal, it converts the second control signal into a high-level signal and outputs the high-level signal to the power management module 103, causing the power management module 103 to convert the power supply voltage into a supply voltage. When the second control unit 302 receives the power supply voltage of the power supply device 104, it outputs a high-level signal, causing the power management module 103 to convert the power supply voltage into a supply voltage.

[0087] In an exemplary embodiment, as Figure 4 shown, the first control unit 301 includes: a signal converter. The signal converter is respectively connected to the monitoring module 201 and the power management module 103, and is configured to convert the first control signal into a power supply stop signal when receiving the first control signal. Wherein, the level state of the power supply stop signal is opposite to that of the first control signal.

[0088] Wherein, the signal converter is further configured to convert the second control signal into a continuous power supply signal when receiving the second control signal. The second control signal is output by the monitoring module 201 when the status feedback signal reaches a preset standard, and the level state of the continuous power supply signal is opposite to that of the second control signal.

[0089] The signal converter may include active devices such as inverters and amplifiers, and the signal converter is not specifically limited in the embodiments of the present application. For example: If the signal converter includes an inverter, the level state of the power supply stop signal is opposite to the level state of the first control signal, and the level state of the continuous power supply signal is opposite to the level state of the second control signal. If the signal converter includes an amplifier, the signal value of the power supply stop signal is larger than the signal value of the first control signal, and the signal value of the continuous power supply signal is larger than the signal value of the second control signal.

[0090] In this embodiment, the signal converter may include an inverter. The input end of the inverter is connected to the output end of the monitoring module 201, and the output end of the inverter is connected to the controlled end of the power management module 103. When the monitoring module 201 monitors that the status feedback signal does not reach the preset standard, it outputs a high-level first control signal (such as a 5V voltage signal). When the signal converter receives the high-level first control signal, it inverts the high-level first control signal to obtain a low-level power supply stop signal (such as a 0V voltage signal). When the monitoring module 201 monitors that the status feedback signal reaches the preset standard within the preset time range, it outputs a low-level second control signal (such as a 0V voltage signal). When the signal converter receives the low-level second control signal, it inverts the low-level second control signal to obtain a high-level continuous power supply signal (such as a 5V voltage signal), which can generate and output a signal for controlling the power supply of the power management module 103, improving the accuracy of power-off reset.

[0091] Optionally, the signal converter includes Figure 4 the converter U1 in []. The main control module 101 includes a CPU, and the power management module 103 includes a voltage regulator chip. Among them, the CPU can also be replaced by other controllers, such as any one of an MCU, a DSP, an FPGA, etc. as the main control device or the core board, and the main control module 101 is not specifically limited in the embodiments of the present application. A voltage regulator chip is an integrated circuit used to provide a stable output voltage and is widely used in electronic devices to ensure the normal operation of each circuit module. The types of voltage regulator chips include linear voltage regulator chips, switching voltage regulator chips, low dropout voltage regulator chips (LDO), bipolar voltage regulator chips, charge pump voltage regulator chips, etc., and the type of voltage regulator chip is not specifically limited in the embodiments of the present application.

[0092] Optionally, the power management module 103 includes an input terminal, an output terminal, and a controlled terminal. The input terminal of the power management module 103 is connected to the power supply device 104, the output terminal of the power management module 103 is connected to the main control module 101, and the controlled terminal of the power management module 103 is respectively connected to the first control unit 301 and the second control unit 302. The power management module 103 operates when it receives a continuous power supply signal with a high level output by the first control unit 301 or the second control unit 302, converts the power supply voltage of the power supply device 104 into the power supply voltage required by the main control module 101, and transmits the power supply voltage to the main control module 101 for power supply. Additionally, when the first control unit 301 receives the first control signal, it converts the first control signal into a power supply stop signal with a low level, and when the second control unit 302 does not receive the power supply voltage of the power supply device 104, it outputs a power supply stop signal with a low level. The power management module 103 stops converting the power supply voltage of the power supply device 104 into the power supply voltage required by the main control module 101 and stops transmitting the power supply voltage to the main control module 101 for power supply when it receives a power supply stop signal with a low level output by the first control unit 301 or a power supply stop signal with a low level output by the second control unit 302. Among them, whether the voltage regulator chip works is controlled by the control signal received by the controlled terminal.

[0093] In an exemplary embodiment, as Figure 4 shown, the second control unit 302 includes: a switch, the second end of the switch is connected to the power management module 103, and when the switch is in the closed state, the power management module 103 can receive a continuous power supply signal.

[0094] Optionally, the second control unit 302 further includes a voltage division circuit, which is used to perform voltage division processing on the power supply voltage output by the power supply device when the switch is in the closed state to generate a continuous power supply signal, and is used to output the continuous power supply signal to the power management module 103 through the switch. The voltage division circuit may include a first resistor circuit and a second resistor circuit. One end of the first resistor circuit is connected to the positive pole of the power supply device 104, and the other end of the first resistor circuit is connected to the first end of the switch. One end of the second resistor circuit is connected to the fourth end of the switch, and the other end of the second resistor circuit is grounded. The second resistor circuit is used to divide the power supply voltage with the first resistor circuit when the switch is closed to generate a continuous power supply signal, and is used to output the continuous power supply signal to the power management module 103.

[0095] Among them, both the first resistor circuit and the second resistor circuit can be composed of one or more resistors, and the first resistor circuit and the second resistor circuit can cooperate to divide the power supply voltage to generate a continuous power supply signal.

[0096] For example, in this embodiment, the switch includes as Figure 4The switch S1 therein, the first resistor circuit may include, for example, Figure 4 the resistor R1 therein, and the second resistor circuit may include, for example, Figure 4 the resistor R2 therein. The switch S1 includes a physical switch, such as an interlocking double-pole double-throw switch. The switch S1 may also include a virtual switch, and the specific form of the switch S1 is not limited in the embodiments of the present application. Exemplarily, the switch S1 includes an interlocking double-pole double-throw switch. The switch S1 includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The connection or disconnection between the first terminal and the second terminal of the switch S1, and the connection or disconnection between the third terminal and the fourth terminal can be synchronized. The first terminal of the resistor R1 is connected to the power supply device 104, the second terminal of the resistor R1 is connected to the first terminal and the third terminal of the switch S1, the second terminal of the switch S1 is connected to the power management module 103, the first terminal of the resistor R2 is connected to the fourth terminal of the switch S1, and the second terminal of the resistor R2 is grounded. When the connection between the first terminal and the second terminal of the switch S1 is conductive and the connection between the third terminal and the fourth terminal is conductive, the switch S1 is in the closed state. The switch S1 conducts the connection between the resistor R1 and the resistor R2, and conducts the connection between the node between the resistor R1 and the resistor R2 and the power management module 103. The resistor R1 and the resistor R2 cooperate to divide the power supply voltage to obtain a continuous power supply signal of a high level and transmit the continuous power supply signal to the power management module 103. When the connection between the first terminal and the second terminal of the switch S1 is disconnected and the connection between the third terminal and the fourth terminal is disconnected, the switch S1 is in the open state. The resistor R1 and the resistor R2 cannot divide the power supply voltage output by the power supply device 104, which is equivalent to the second control unit 302 outputting a power supply stop signal of a low level to the power management module 103.

[0097] In an exemplary embodiment, the main control module 101 may be connected to the fourth terminal of the switch S1 described above. The main control module 101 may be a CPU. When the CPU is in the power-on state, the switch S1 is closed, and the levels at the second terminal and the fourth terminal of the switch S1 are high levels, that is, the level read by the CPU is a high level. If the switch S1 is open, the levels at the second terminal and the fourth terminal of the switch S1 are low levels, that is, the level read by the CPU is a low level. Therefore, the CPU can determine whether it receives a power-on instruction (that is, the switch S1 is conductive) or a power-off instruction (that is, the switch S1 is open) by judging the level state read, improving the accuracy of the CPU to control power-on and power-off. In an exemplary embodiment, next, taking Figure 4The described embodiments illustrate the working principle. Taking the monitoring module 201 as a watchdog circuit, the power management module 103 as a voltage regulator chip, the main control module 101 as a CPU, and the signal converter inverter as an example for illustration. When the switch S1 is closed, the power supply device 104 outputs a high-level power supply voltage and transmits it to the controlled terminal of the voltage regulator chip through the switch S1. The voltage regulator chip operates and supplies power to the CPU. The program in the CPU runs and outputs a watchdog signal to the watchdog circuit. The watchdog circuit outputs a low-level signal to the inverter. The inverter inverts the low-level signal and outputs a high-level signal to the controlled terminal of the voltage regulator chip, causing the entire circuit to enter the working state.

[0098] When the entire circuit is in the working state, if the CPU freezes or the program runs amok, the CPU stops outputting the watchdog signal. If the watchdog circuit does not receive the watchdog signal within the preset time range, it outputs a high-level signal. The inverter inverts the high-level signal and outputs a low-level signal to the power management module 103. At this time, since the inverter is an active device, it generally needs to be grounded. Therefore, the power supply voltage output by the power supply device 104 is grounded after passing through the resistor R1, the switch S1, and the inverter, thereby also pulling down the level of the controlled terminal of the voltage regulator chip. As a result, the voltage regulator chip stops working and stops supplying power to the CPU and other components of the circuit, powering off the CPU and the inverter. After power-off, since the inverter also stops working, the output terminal of the inverter is in a high-impedance state (similar to a floating state), that is, the path from the power supply voltage through the switch S1 to the inverter is disconnected. However, since the switch S1 is still closed, the output terminal of the switch S1 will output a continuous high-level power supply signal to the voltage regulator chip again. The controlled terminal of the voltage regulator chip will be pulled up again under the action of the high level, and the voltage regulator chip works again, and the CPU restarts.

[0099] It should be noted that in this embodiment, the CPU is reset by controlling the voltage regulator chip to power on the CPU again, which is different from the traditional reset mechanism through the reset pin. After the CPU is powered on again, it will automatically enter the working state, which can prevent the CPU from switching to the non-working state after reset, so as to realize the automatic power-off reset of the CPU and improve the convenience and practicality of the device.

[0100] In addition, if you want to shut down, that is, the switch S1 will be disconnected. At this time, the power supply device 104 still supplies power to the CPU, the watchdog circuit, the inverter and other devices through the voltage regulator chip. Therefore, the inverter still maintains an output of high level. However, after the CPU reads that the fourth terminal of the switch S1 is low level, the CPU will end the operation and thus will not output the watchdog signal. If the watchdog circuit does not receive the watchdog signal within the preset time range, it outputs a high-level signal. The inverter inverts the high-level signal and outputs a low-level signal to the power management module 103. After that, the entire system completely loses power and enters the shutdown state, thereby being able to reduce the power consumption of the device after shutdown.

[0101] In an exemplary embodiment, the control module 202 has another implementation. As Figure 5 shown, the first control unit 301 further includes: a first switch circuit, the first switch circuit includes a first controlled terminal, a first input terminal, a second input terminal, and a first output terminal, the first controlled terminal is connected to the monitoring module 201, the first output terminal is connected to the power management module 103, the first input terminal is grounded, and the second input terminal is connected to a supply voltage.

[0102] The first switch circuit is configured to connect a first connection channel between the first input terminal and the first output terminal when receiving a first control signal, and the first connection channel outputs a power supply stop signal through the first output terminal.

[0103] The first switch circuit is further configured to connect a second connection channel between the second input terminal and the first output terminal when receiving a second control signal, and the second connection channel outputs a continuous power supply signal through the first output terminal according to the supply voltage.

[0104] Wherein, the first switch circuit may include a digital switch circuit, an analog switch circuit, a mechanical switch circuit, etc., and the first switch circuit is not specifically limited in the embodiments of the present application.

[0105] In this embodiment, the first switch circuit includes the analog switch U2 as Figure 5 shown, the first controlled terminal of the first switch circuit is the ENB pin of the analog switch U2 as Figure 5 shown, the first input terminal of the first switch circuit is the A1 pin of the analog switch U2 as Figure 5 shown, the second input terminal of the first switch circuit is the A2 pin of the analog switch U2 as Figure 5 shown, the first output terminal of the first switch circuit is the B pin of the analog switch U2 as Figure 5 shown, and the supply voltage includes the VDD power supply as Figure 5 shown. Wherein, the VDD power supply may be provided by the power management module 103. Wherein, the first connection channel may refer to the circuit formed within the analog switch U2 after the A1 pin and the B pin of the analog switch U2 are connected. The second connection channel may refer to the circuit formed within the analog switch U2 after the A2 pin and the B pin of the analog switch U2 are connected.

[0106] Optionally, when the analog switch U2 receives a high-level first control signal, it connects the connection between the A1 pin and the B pin, thereby connecting the first connection channel, causing the controlled terminal of the power management module 103 to be grounded, that is, outputting a power supply stop signal through the first connection channel to pull down the level of the controlled terminal of the power management module 103. When the analog switch U2 receives a low-level second control signal, it connects the connection between the A2 pin and the B pin, thereby connecting the second connection channel, causing the controlled terminal of the power management module 103 to be connected to the power supply voltage, that is, generating a continuous power supply signal according to the power supply voltage through the second connection channel to pull up the level of the controlled terminal of the power management module 103, which is equivalent to outputting a continuous power supply signal to the power management module 103.

[0107] It should be noted that the output of the analog switch U2 is controlled by the level of the ENB pin. When the ENB pin receives a high level, the analog switch U2 internally connects the channel between the B pin and the A1 pin, and the B pin outputs the level at the A1 pin. When the ENB pin receives a low level, the analog switch U2 internally connects the channel between the B pin and the A2 pin, and the B pin outputs the level at the A2 pin (i.e., VDD, which is also a specific example of the continuous power supply signal).

[0108] In an exemplary embodiment, as Figure 5 shown, the second control unit 302 further includes: a switch and a second switch circuit. The second switch circuit includes a second controlled terminal, a third input terminal, a second output terminal, and a third output terminal. The second controlled terminal and the third input terminal are connected to the switch (the switch is such as Figure 5 S2 in). The second output terminal is connected to the power management module, and the third output terminal is left floating. The second switch circuit is configured to receive the power supply voltage when the switch is closed, connect the third connection channel between the third input terminal and the second output terminal according to the power supply voltage, and output a continuous power supply signal through the third connection channel. The second switch circuit is further configured to connect the fourth connection channel between the third input terminal and the third output terminal when the switch is open, so that the second output terminal is left floating. At this time, the second output terminal outputs a power supply stop signal.

[0109] Among them, the second switch circuit may include a digital switch circuit, an analog switch circuit, a mechanical switch circuit, etc. The specific form of the second switch circuit is not limited in the embodiments of the present application.

[0110] In this embodiment, the second control unit 302 may specifically include a switch, a first resistor circuit, a second resistor circuit, and a second switch circuit. The switch is, for example, a single-pole single-throw switch (such as S2 in the figure). The first resistor circuit and the second resistor circuit respectively correspond to the Figure 5 resistor R6 and resistor R3 in. The second switch circuit, for example, includes such as Figure 5the analog switch U3 and the resistor R4 therein, the second controlled end of the second switch circuit includes Figure 5 the ENB pin of the analog switch U3 in Figure 5 the B pin of the analog switch U3 in Figure 5 the A1 pin of the analog switch U3 in Figure 5 the A2 pin of the analog switch U3 in. The first end of the resistor R6 is connected to the power supply device 104, and the second end of the resistor R6 is connected to the first end of the switch S2. The first end of the resistor R3 is connected to the second end of the switch S2, and the second end of the resistor R3 is grounded. The first end of the resistor R4 is connected to the second end of the switch S2, and the second end of the resistor R4 is connected to the B pin of the analog switch U3. Among them, the third connection channel may refer to the circuit formed within the analog switch U3 after the B pin and the A1 pin of the analog switch U3 are connected. The fourth connection channel may refer to the circuit formed within the analog switch U3 after the B pin and the A2 pin of the analog switch U3 are connected. The resistor R4 serves as a current-limiting resistor to prevent a short-circuit fault in the circuit between the power supply device and the VDD power supply when the analog switch U3 is short-circuited.

[0111] Optionally, when the switch S2 is closed, the power supply voltage output by the power supply device 104 is divided by the resistors R6 and R3 and then input to the controlled end of the analog switch U3 (that is, the controlled end receives a high level). The analog switch U3 connects the connection between the B pin and the A1 pin, thereby connecting the third connection channel, obtaining a continuous power supply signal (that is, the high level after the power supply voltage is divided by the resistors R6 and R3), and outputting the continuous power supply signal to the power management module 103 through the third connection channel. When the switch S2 is open, the controlled end of the analog switch U3 does not receive a high level (that is, it receives a low level), thereby connecting the connection between the B pin and the A2 pin, that is, connecting the fourth connection channel. At this time, the A1 pin is floating, which is equivalent to the second output end (A1 pin) outputting a power supply stop signal to the power management module 103.

[0112] It should be noted that the output of the analog switch U2 is controlled by the level of the ENB pin. When the ENB pin receives a high level, the analog switch U2 internally connects the channel between the B pin and the A1 pin, and the A1 pin outputs the level at the B pin. When the ENB pin receives a low level, the analog switch U2 internally connects the channel between the B pin and the A2 pin, and at this time the A1 pin has no output.

[0113] Next, take Figure 5Taking the illustrated embodiment as an example, the working principle of the power control circuit 100 will be described. Among them, the monitoring module 201 can be a watchdog circuit, the main control module 101 can be a CPU, and the power management module 103 can be a voltage regulator chip. When the switch S2 is closed, the CPU is in a working state. The B pin and the A1 pin of the analog switch U3 are connected. The power supply voltage output by the power supply device 104 is input to the B pin of the analog switch U3 after voltage division, and is output to the controlled end of the voltage regulator chip through the A1 pin, thereby pulling up the controlled end of the voltage regulator chip. The voltage regulator chip generates a supply voltage and supplies power to the CPU to enable the CPU to operate normally. During the normal operation of the CPU program, a watchdog signal will be output to the watchdog circuit. The watchdog circuit outputs a low-level signal to the analog switch U2. After receiving the low-level signal, the analog switch U2 connects the B pin and the A2 pin, and outputs the supply voltage VDD to the controlled end of the voltage regulator chip, so that the controlled end of the voltage regulator chip remains at a high level continuously, and the entire circuit enters a working state.

[0114] If the CPU crashes or the program runs wild, the watchdog circuit will output a high-level signal to the ENB pin of the analog switch U2, causing the B pin of the analog switch U2 to be connected to A1, and then causing the controlled end of the voltage regulator chip to pass through Figure 5 the resistor R5 in it to be grounded, that is, pulling down the level of the controlled end of the voltage regulator chip. The voltage regulator chip stops working and stops outputting the supply voltage, so that the CPU, the analog switch U3, the analog switch U2, the watchdog circuit, etc. are powered off. After power-off, the B pin of the analog switch U2 is in a high-impedance state, but since the switch S2 is still closed, the ENB pin of the analog switch U3 is at a high level, and the A1 pin is still connected to the B pin, that is, the A1 pin of the analog switch U3 will still output a high level, so that the controlled end of the voltage regulator chip will be pulled up again under the action of the power supply voltage, and the voltage regulator chip supplies power to the CPU again to restart the CPU.

[0115] In addition, in the related art, most of the circuits used to implement soft shutdown need to keep the central processing unit in a low-power state when the device is turned off to ensure that the device can be turned on through software control, that is, the power of the device cannot be completely cut off, resulting in power consumption during the standby state. For some unattended devices or devices that need to be stored for a long time, if this circuit is used, it will cause power consumption during the period when the device is not in use, reducing the usage time of the device and affecting the user experience.

[0116] In response to this, the embodiment of the present application discloses a power control circuit 100 for reducing energy consumption. In an exemplary embodiment, the main control module 101 is connected to the control module 202. The main control module 101 is used to control the monitoring module 201 to output a first control signal when it detects that the control module 202 is not connected to the power supply voltage.

[0117] Among them, the main control module 101 can be connected to the line in the control module 202 that is connected between the power supply device 104 and the power management module 103, so as to determine whether the control module 202 is connected to the power supply voltage by detecting whether the power supply device 104 has established an electrical connection with the control module 202. Among them, when the control module 202 is connected to the power supply voltage, it means that the power control circuit 100 is connected to the power supply. For example, the device where the power control circuit 100 is located is in the power-on state. When the control module 202 is not connected to the power supply voltage, it means that the power control circuit 100 is not connected to the power supply. For example, the device where the power control circuit 100 is located is in the power-off state.

[0118] In this embodiment, if the power control circuit 100 is applied to an unattended device, the main control module 101 can accurately identify whether the unattended device is in the power-on state or the power-off state by identifying whether the control module 202 is connected to the power supply voltage. And after confirming that the unattended device is in the power-off state, the control monitoring module 201 is controlled to output a first control signal to the control module 202. After receiving the first control signal, the control module 202 can control the power management module 103 to stop outputting the supply voltage, so as to ensure that the main control module 101 cannot receive the supply voltage, and then the main control module 101 stops running, reducing the energy consumption of the entire device. And because the control module 202 is not connected to the power supply voltage at this time, the power management module 103 will not be restarted either, ensuring that the entire device completely enters the power-off and power-off state.

[0119] In an exemplary embodiment, as Figure 3 shown, the main control module 101 is connected to the second control unit 302. When the main control module 101 detects that the second control unit 302 is not connected to the power supply voltage, it controls the monitoring module 201 to output a first control signal.

[0120] Among them, the main control module 101 can be connected to the line in the second control unit 302 that is connected between the power supply device 104 and the power management module 103, and detect whether the power supply device 104 has established an electrical connection with the second control unit 302 to determine whether the second control unit 302 is connected to the power supply voltage.

[0121] Among them, when the second control unit 302 is connected to the power supply voltage, it means that the power control circuit 100 is connected to the power supply. For example, the device where the power control circuit 100 is located is in the power-on state. When the second control unit 302 is not connected to the power supply voltage, it means that the power control circuit 100 is not connected to the power supply. For example, the device where the power control circuit 100 is located is in the power-off state.

[0122] In this embodiment, if the power control circuit 100 is applied to an unattended device, the main control module 101 can accurately identify whether the unattended device is in the power-on state or the power-off state by determining whether the second control unit 302 is connected to the power supply voltage. After confirming that the unattended device is in the power-off state, the main control module 101 controls the monitoring module 201 to output a first control signal to the first control unit 301. The first control unit 301 outputs a power supply stop signal based on the first control signal to control the power management module 103 to stop outputting the power supply voltage, so that the main control module 101 cannot receive the power supply voltage, and then the main control module 101 stops running, reducing the energy consumption of the entire system.

[0123] In an exemplary embodiment, the main control module 101 is connected to a switch. The main control module 101 is further configured to control the monitoring module 201 to output a first control signal when it detects that the switch is in the off state.

[0124] Wherein, the switch is, for example, Figure 4 the switch S1 in the illustrated embodiment, then the main control module 101 can be connected to the fourth terminal of the switch S1. In this embodiment, if the monitoring module 201 is a watchdog circuit, the main control module 101 is a CPU, and the power management module 103 is a voltage regulator chip, then if you want to enter the power-off state and disconnect the switch S1, but at this time the power supply device 104 still supplies power to the CPU, watchdog circuit, etc. through the voltage regulator chip, and the voltage regulator chip will not stop working immediately. However, in this embodiment, the main control module 101 can read that the fourth terminal of the switch S1 outputs a low level at this time, then it can be determined that a power-off instruction is received, and thus the operation can be ended. At this time, the main control module 101 stops outputting the watchdog signal. If the watchdog circuit does not receive the watchdog signal within the preset time range, it outputs a high-level signal, and the inverter inverses the high-level signal and outputs a low-level signal, thereby causing the voltage regulator chip to stop running. After that, the entire power control circuit 100 can be in a power-off state.

[0125] The switch can also be Figure 5Switch S2 of the illustrated embodiment. In this embodiment, the monitoring module 201 can be a watchdog circuit, the main control module 101 can be a CPU, and the power management module 103 can be a voltage regulator chip. When it is desired to enter the shutdown state, switch S2 is disconnected. However, since the power supply device 104 still supplies power to the CPU, watchdog circuit, analog switches U2 and U3 through the voltage regulator chip, analog switch U2 still maintains a high output level, and the voltage regulator chip does not stop working immediately. It is not until the CPU reads the shutdown instruction from switch S2, that is, reads a low level at the second terminal of switch S2, that the CPU will end the program operation. At this time, the watchdog circuit outputs a high level to analog switch U2, and then analog switch U2 outputs a low level to pull down the potential of the controlled terminal of the voltage regulator chip, causing the voltage regulator chip to stop working, and the entire power control circuit 100 is completely powered off and enters the shutdown state, improving the accuracy of device shutdown.

[0126] It should be noted that, for the power control circuit 100 provided in the above embodiment, on the one hand, the operation state of the main control module 101 is monitored through the switching circuit 102, and with the cooperation of the power management module 103, the automatic restart function can be realized when a crash occurs during normal operation. On the other hand, through the control of the main control module 101, when shutdown is required, the entire power control circuit 100 can be completely powered off, greatly reducing the power consumption after shutdown.

[0127] In an exemplary embodiment, the embodiment of the present application further provides an aircraft detection device, including: the power control circuit 100 as described in any of the above embodiments. In this aircraft detection device, the main control module 101 can detect an aircraft (such as a drone). During the detection process of the drone by the main control module 101, if a crash or program runaway occurs, the power control circuit 100 can perform a power-off reset on the main control module 101.

[0128] Optionally, during the detection process of the drone, if a crash or program runaway occurs in the main control module 101, the power control circuit 100 first cuts off the power supply line of the main control module 101 by the power management module 103, causing the main control module 101 to be powered off and shut down briefly. However, after a short period of time, the power control circuit 100 can re-establish the power supply line of the main control module 101 by the power management module 103, causing the main control module 101 to be powered on and restarted.

[0129] In an exemplary embodiment, the embodiment of the present application further provides an aircraft countermeasure device, including: the power control circuit 100 of any one of the above embodiments. The aircraft countermeasure device can countermeasure an aircraft (such as a drone), where the countermeasure means include, for example: interfering with the communication between the drone and the control terminal, or luring the drone, etc., some means that can make the drone unable to work properly. During the process of the main control module 101 countermeasuring the drone, if a crash or program runaway occurs, the power control circuit 100 can perform a power-off reset on the main control module 101.

[0130] Optionally, during the process of countermeasuring the drone, if the main control module 101 crashes or the program runs away, the power control circuit 100 cuts off the power supply line of the main control module 101 by the power management module 103, so that the main control module 101 is powered off briefly and shuts down. After a certain period of time, the power control circuit 100 re-establishes the power supply line of the main control module 101 by the power management module 103, so that the main control module 101 is powered on again and boots up.

[0131] In an exemplary embodiment, the embodiment of the present application further provides an electronic device, including: the power control circuit 100 of any one of the above embodiments. The power control circuit 100 is used to perform a power-off reset on the main control module 101 when the main control module 101 crashes or the program runs away during the process of executing the corresponding task.

[0132] Optionally, the electronic device can include any device that uses several electronic components and chips to implement a certain function, such as: a surveillance camera, a listening device, a detection device, a communication device, etc. The embodiment of the present application does not specifically limit the electronic device.

[0133] In an exemplary embodiment, the embodiment of the present application further provides an aircraft control system, including one or more of the following:

[0134] The power control circuit 100 of any one of the above embodiments.

[0135] Or, the aircraft detection device of the above embodiment.

[0136] Or, the aircraft countermeasure device of the above embodiment.

[0137] Or, the electronic device of the above embodiment.

[0138] It can be understood that the aircraft control system may include one or more devices, such as including one or more aircraft detection devices, or including one or more aircraft countermeasure devices, or including one or more aircraft detection devices and one or more aircraft countermeasure devices, or including one or more electronic devices. The above power control circuit 100, aircraft detection device, aircraft countermeasure device, electronic device, and aircraft control system may also take other forms, not limited to the forms already mentioned in the above embodiments, as long as they can achieve the function of controlling the central processor to automatically perform a power-off reset when the central processor is in an inoperative state.

[0139] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0140] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0141] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A power control circuit, characterized in that, Including: A main control module, configured to output a status feedback signal according to the operating status; A power management module, connected to a power supply device and the main control module respectively. The power management module is configured to convert the power supply voltage of the power supply device into a power supply voltage and then output it to the main control module; A switching circuit, connected to the power supply device, the power management module and the main control module respectively. The switching circuit is configured to control the power management module to stop outputting the power supply voltage and cut off the power supply of the main control module when the status feedback signal does not reach a preset standard. The switching circuit is further configured to control the power management module to re-output the power supply voltage and restart the main control module according to the received power supply voltage after controlling the power management module to stop working.

2. The power control circuit according to claim 1, wherein The switching circuit includes: A monitoring module, connected to the main control module, and configured to output a first control signal when the status feedback signal does not reach a preset standard; A control module, connected to the power supply device, the power management module and the monitoring module respectively. The control module is configured to control the power management module to stop outputting the power supply voltage and cut off the power supply of the main control module when receiving the first control signal. The control module is further configured to control the power management module to re-output the power supply voltage and restart the main control module according to the received power supply voltage after controlling the power management module to stop working.

3. The power control circuit according to claim 2, wherein, The control module includes: A first control unit, connected to the monitoring module and the power management module respectively. The first control unit is configured to convert the first control signal into a power supply stop signal when receiving the first control signal, so that the power management module stops outputting the power supply voltage when receiving the power supply stop signal; A second control unit, connected to the power supply device and the power management module respectively. The second control unit is configured to generate a continuous power supply signal according to the power supply voltage when receiving the power supply voltage, so that the power management module re-outputs the power supply voltage when receiving the continuous power supply signal.

4. The power control circuit according to claim 3, wherein The monitoring module is further configured to output a second control signal when the status feedback signal reaches the preset standard. The first control unit includes: A signal converter, connected to the monitoring module and the power management module respectively. The signal converter is configured to convert the first control signal into the power supply stop signal when receiving the first control signal. Wherein, the level state of the power supply stop signal is opposite to the level state of the first control signal; The signal converter is further configured to convert the second control signal into the continuous power supply signal when receiving the second control signal. Wherein, the level state of the continuous power supply signal is opposite to the level state of the second control signal.

5. The power control circuit according to claim 3, characterized in that The monitoring module is further configured to output a second control signal when the status feedback signal reaches the preset standard. The first control unit includes: The first switch circuit, the first switch circuit includes a first controlled terminal, a first input terminal, a second input terminal, and a first output terminal. The first controlled terminal is connected to the monitoring module, the first output terminal is connected to the power management module, the first input terminal is grounded, the second input terminal is connected to the supply voltage, and the first switch circuit is configured to connect a first connection channel between the first input terminal and the first output terminal when receiving the first control signal, and the first connection channel outputs the power supply stop signal through the first output terminal; The first switch circuit is further configured to connect a second connection channel between the second input terminal and the first output terminal when receiving the second control signal, and the second connection channel outputs the continuous power supply signal through the first output terminal according to the supply voltage.

6. The power control circuit according to claim 3, wherein The second control unit includes: A switch, connected to the power supply device; A second switch circuit, the second switch circuit includes a second controlled terminal, a third input terminal, a second output terminal, and a third output terminal. The second controlled terminal and the third input terminal are connected to the switch, the second output terminal is connected to the power management module, and the third output terminal is floating; The second switch circuit is configured to connect a third connection channel between the third input terminal and the second output terminal after receiving the power supply voltage when the switch is closed, and the third connection channel outputs the continuous power supply signal through the second output terminal; The second switch circuit is further configured to connect a fourth connection channel between the third input terminal and the third output terminal when the switch is open, so that the second output terminal outputs the power supply stop signal.

7. The power control circuit according to claim 6, wherein The main control module is further connected to the switch; the main control module is further configured to control the monitoring module to output the first control signal when detecting that the switch is in an open state.

8. The power control circuit according to claim 2, wherein The main control module is further connected to the control module; the main control module is configured to control the monitoring module to output the first control signal when detecting that the control module is not connected to the power supply voltage.

9. An aircraft detection device, characterized in that, The aircraft detection device includes the power control circuit according to any one of claims 1 to 8.

10. An aircraft countermeasure device, characterized in that, The aircraft countermeasure device includes the power control circuit according to any one of claims 1 to 8.

11. An electronic device, characterized in that, The electronic device includes the power control circuit according to any one of claims 1 to 8.

12. An aircraft control system, characterized in that, The aircraft control system includes the power control circuit according to any one of claims 1 to 8; Or, the aircraft control system includes the aircraft detection device according to claim 9; Or, the aircraft control system includes the aircraft countermeasure device according to claim 10; Or, the aircraft control system includes the electronic device according to claim 11.

Images