Low effective signal detection circuit, method and equipment
By designing a low-effective signal detection circuit, the first power supply circuit and the second power supply circuit provide high-voltage and low-voltage power supply to the body controller, and adjusting the power strategy through the sleep and wake-up power supply circuit, the power consumption imbalance problem of the body controller during sleep and start is solved, and the power consumption imbalance is achieved.
Patent Information
- Application Number
- CN202510685828.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2025-07-22
AI Technical Summary
The body controller continuously consumes power when the vehicle is not started, resulting in battery power loss. How to balance its power consumption during sleep and startup to optimize power usage.
A low-effective signal detection circuit is designed, including a first power supply circuit and a second power supply circuit, which provides high-voltage and low-voltage power supply to the vehicle body controller, and adjusts the power supply strategy in different states through the sleep and wake-up power supply circuit to reduce unnecessary power consumption.
It effectively reduces the power consumption of the body controller in the sleep state, optimizes the power usage, and ensures that the functions can still be performed normally during startup.
Smart Images
Figure CN120348232A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of vehicle wake-up, and in particular to a low-valid signal detection circuit, method and device. Background Art
[0002] The body controller is located at the outermost part of the whole vehicle. When the driver has not started the vehicle, all signal changes on the vehicle body need to be responded by the body controller. Therefore, the body controller cannot stop power supply after being installed in the vehicle. This will continuously consume the power of the battery. Therefore, how to balance the power consumption of the body controller when the vehicle is parked alone and when it is normally performing functions has become an important issue to be considered in the design of the body controller. Summary of the Invention
[0003] Embodiments of the present invention provide a low-valid signal detection circuit, method and device for solving the power consumption problem of the body controller in the prior art.
[0004] In a first aspect, embodiments of the present invention provide a low-valid signal detection circuit, including: a first power supply circuit, a second power supply circuit and a detection circuit, wherein the detection circuit includes a body controller; The first power supply circuit is configured to input a high-voltage power supply to the detection circuit; The second power supply circuit is configured to input a low-voltage power supply to the detection circuit to supply power to the body controller in the detection circuit through the low-voltage power supply; The detection circuit is configured to receive an externally input low-valid signal and perform a feedback operation through the high-voltage power supply when the body controller detects the low-valid signal.
[0005] Optionally, the second power supply circuit includes: a sleep power supply circuit and a wake-up power supply circuit; The sleep power supply circuit is configured to pull up a low-valid signal that the body controller needs to interact with the outside world at low power consumption through a low-voltage power supply when the vehicle is in a sleep state; The wake-up power supply circuit is configured to pull up a low-valid signal that the body controller does not need to interact with the outside world at low power consumption through a low-voltage power supply after the vehicle is started.
[0006] Optionally, an output end of the body controller is connected to input ends of the first power supply circuit and the second power supply circuit, and is configured to control the first power supply circuit to conduct through a first control signal and control the second power supply circuit to conduct through a second control signal.
[0007] Optionally, the first power supply circuit includes: a first switch and a second switch; The first switch is configured to close under the action of the first control signal, thereby conducting the second switch; The second switch is turned on based on the first switch being turned on to provide a high-voltage power supply for the detection circuit through the connected storage battery. Wherein, the first switch is further configured to protect the body controller from being burned out by the storage battery.
[0008] Optionally, the first switch is a triode, and the second switch is a MOS transistor; The triode is configured to pull down the gate of the MOS transistor when turned on to connect the source and drain of the MOS transistor; The source of the MOS transistor is connected to the storage battery, and the drain of the MOS transistor is connected to the detection circuit, and is configured to supply power to the detection circuit through the storage battery when turned on.
[0009] Optionally, the second power supply circuit includes: a third switch and a fourth switch; The third switch is configured to be turned on under the action of the second control signal, thereby turning on the fourth switch; The fourth switch is turned on based on the third switch being turned on to provide a low-voltage power supply for the detection circuit through the connected low-voltage power supply.
[0010] Optionally, the third switch and the fourth switch are triodes; The third switch is configured to make the emitter voltage of the fourth switch higher than the base voltage when turned on to turn on the fourth switch; The emitter of the fourth switch is connected to the low-voltage power supply, and the collector of the fourth switch is connected to the detection circuit, and is configured to supply power to the detection circuit through the low-voltage power supply when turned on.
[0011] Optionally, the second power supply circuit further includes: a filtering module, and the filtering module includes a filtering capacitor and a filtering resistor; The filtering capacitor is configured to filter the output of the second power supply circuit; The filtering resistor is configured to release the electrons stored in the filtering capacitor.
[0012] Optionally, the detection circuit further includes: a first detection circuit, and / or, a second detection circuit; The first detection circuit accesses the low-valid signal input from the outside to the control chip of the body controller through a voltage-dividing resistor; The second detection circuit accesses the low-valid signal input from the outside to the control chip of the body controller through a voltage-dividing resistor and a diode.
[0013] In a second aspect, an embodiment of the present invention provides a method for detecting a low-valid signal. The method is applied to a body controller in a detection circuit, and the method includes: Monitor a low-valid signal input from the outside world; When the low-valid signal is received, turn on the first power supply circuit to perform a feedback operation through the high-voltage power supply input by the first power supply circuit; Among them, the body controller is powered by a low-voltage power supply input by the second power supply circuit.
[0014] Optionally, the second power supply circuit includes: a sleep power supply circuit and a wake-up power supply circuit; The sleep power supply circuit is used to pull up the low-valid signal that the body controller needs to interact with the outside world at low power consumption through the low-voltage power supply when the vehicle is in a sleep state; The wake-up power supply circuit is used to pull up the low-valid signal that the body controller does not need to interact with the outside world at low power consumption through the low-voltage power supply after the vehicle is started.
[0015] In a third aspect, an embodiment of the present invention provides an electronic device, including the low-valid signal detection circuit according to any one of the first aspects, for performing the low-valid signal detection method according to any one of the second aspects.
[0016] In the embodiments of the present invention, the first power supply circuit and the second power supply circuit are respectively set to supply power to the low-valid signal detection circuit. At the same time, by setting a sleep power supply circuit and a wake-up power supply circuit in the second power supply circuit, the low-valid signal that the body controller needs to interact with the outside world at low power consumption, and the low-valid signal that the body controller does not need to interact with the outside world at low power consumption are pulled up when the vehicle is in a sleep state and after the vehicle is started, so as to balance the power consumption of the body controller when the vehicle is parked alone and the functions that need to be normally executed. Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. 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 according to these drawings.
[0018] Figure 1 The following shows a structural schematic diagram of a low-valid signal detection circuit provided by an embodiment of the present invention; Figure 2 The following shows a schematic diagram of a specific low-valid signal detection circuit provided by an embodiment of the present invention; Figure 3 The following shows a schematic diagram of another specific low-valid signal detection circuit provided by an embodiment of the present invention; Figure 4 The following shows a schematic diagram of another specific low-valid signal detection circuit provided by an embodiment of the present invention; Figure 5 The figure shows a schematic diagram of another specific low-valid signal detection circuit provided by an embodiment of the present invention; Figure 6 The figure shows a flowchart of a low-valid signal detection method provided by an embodiment of the present invention; Figure 7 The figure shows a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Detailed implementation manners
[0019] To better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0020] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.
[0021] As Figure 1 shown, the figure shows a schematic diagram of the structure of a low-valid signal detection circuit provided by an embodiment of the present invention. Refer to Figure 1 , the low-valid signal detection circuit includes a first power supply circuit 110, a second power supply circuit 120, and a detection circuit 130. Among them, the detection circuit 130 further includes a body controller 131.
[0022] The first power supply circuit 110 is used to input a high-voltage power supply to the detection circuit.
[0023] The second power supply circuit 120 is used to input a low-voltage power supply to the detection circuit to supply power to the body controller in the detection circuit through the low-voltage power supply. Among them, the second power supply circuit specifically includes a sleep power supply circuit 121 and a wake-up power supply circuit 122.
[0024] The detection circuit 130 is used to receive an externally input low-valid signal, and when the body controller detects the low-valid signal, perform a feedback operation through the high-voltage power supply.
[0025] Generally, the low-valid signals include: four-door door touch switches, turn signal switches, left front door ACTR switches, tailgate unlock switches, rear fog lamp switches, hazard warning switches, turn signal feedback switches, window lock button switches.
[0026] According to different application scenarios, the low-valid signals can be specifically divided into low-valid signals that the body controller does not need to interact with the outside world when in low power consumption, such as turn signal switches; and low-valid signals that need to interact with the outside world when in low power consumption, such as four-door door touch switches.
[0027] For two different low-valid signals, two different second power supply circuits are used to supply power to them respectively. Specifically, the second power supply circuit includes a sleep power supply circuit and a wake-up power supply circuit. The sleep power supply circuit is used to pull up the low-valid signals that the body controller needs to interact with the outside world at low power consumption through a low-voltage power supply when the vehicle is in a sleep state; the wake-up power supply circuit is used to pull up the low-valid signals that the body controller does not need to interact with the outside world at low power consumption through a low-voltage power supply after the vehicle is started.
[0028] The sleep power supply circuit always supplies power to the body controller in the detection circuit, and even when the vehicle is in a sleep state, it will supply power to the body controller in the detection circuit to detect the low-valid signals.
[0029] The wake-up power supply circuit does not supply power to the body controller in the detection circuit when the vehicle is in a sleep state, and the body controller does not detect the corresponding low-valid signals; while when the vehicle is woken up, it will supply power to the body controller in the detection circuit to detect the corresponding low-valid signals.
[0030] In the embodiment of the present invention, the output end of the body controller is connected to the input ends of the first power supply circuit and the second power supply circuit, and is used to input a first control signal to the first power supply circuit to control the first power supply circuit to conduct; input a second control signal to the second power supply circuit to control the second power supply circuit to conduct.
[0031] Specifically, the first power supply circuit includes a first switch and a second switch. The first switch is used to close under the action of the first control signal, thereby conducting the second switch and protecting the body controller from being burned by the high-voltage power supply of the battery. The second switch is conducted based on the first switch to provide a high-voltage power supply for the detection circuit through the connected battery.
[0032] See Figure 2 , which is a specific low-valid signal detection circuit provided by the embodiment of the present invention. In this specific implementation, the first switch is a triode, and the second switch is a MOS transistor.
[0033] Specifically, the body controller inputs a first control signal to the first power supply circuit through the control chip MCU. When the first control signal "MCU_UNWAKE_CTR" signal is pulled high, the first switch (triode Q6) is closed through the voltage division of resistor R71 and resistor R72, and the gate of the second switch (MOS transistor Q5) is pulled low through resistor R70, thereby opening the source and drain of the second switch. The source of the second switch is connected to the battery, and the drain is connected to the detection circuit. The 12V connected to the second switch is the in-vehicle battery for direct power supply. When the second switch is turned on, the "+12Vo_UNWAKE" network connected to the output end of the second switch is turned on, and a high-voltage power supply is provided through the 12V power supply.
[0034] The second power supply circuit specifically includes a third switch and a fourth switch. The third switch is used to turn on under the action of a second control signal, thereby conducting the fourth switch. The fourth switch is turned on based on the conduction of the third switch to supply power to the detection circuit through the connected low-voltage power supply.
[0035] Optionally, in some embodiments, a filtering module is further included in the second power supply circuit. The filtering module specifically includes a filtering capacitor and a filtering resistor. The filtering capacitor is used to filter the output of the second power supply circuit, and the filtering resistor is used to release the electrons stored in the filtering capacitor.
[0036] Among them, in the second power supply circuit, the composition of the sleep power supply circuit and the wake-up power supply circuit is mostly similar, only the power network and the actual second control signal are different.
[0037] See Figure 3 , which is another specific low-valid signal detection circuit provided by the embodiment of the present invention. In this specific implementation, the third switch and the fourth switch are triodes. The second power supply circuit is a sleep power supply circuit.
[0038] Specifically, the body controller inputs a second control signal to the second power supply circuit through the MCU. When the second control signal "MCU_3.3OPEN" is pulled high, the third switch (triode Q2) is connected up and down through the voltage division of resistor R61 and resistor R62. At this time, the emitter voltage of the fourth switch (triode Q1) is higher than the base voltage, and the fourth switch is turned on, connecting the 3.3V network to the "+3.3Vo_WAKE" at the collector terminal of the fourth switch to provide a low-voltage power supply for it.
[0039] Among them, C46 is a filtering capacitor for filtering the output of 3.3V. Resistor R63 can quickly release the electrons stored in C46 after the fourth switch is turned off, thereby realizing the function of pulling down the potential.
[0040] See Figure 4 , which is another specific low-valid signal detection circuit provided by the embodiment of the present invention. In this specific implementation, the third switch and the fourth switch are triodes. The second power supply circuit is a wake-up power supply circuit.
[0041] Specifically, after the vehicle is woken up, the body controller inputs a second control signal to the second power supply circuit through the MCU. When the second control signal "MCU_UNWAKE_CTR" is pulled high, the third switch (triode Q4) is connected up and down through the voltage division of resistor R66 and resistor R67. At this time, the emitter voltage of the fourth switch (triode Q3) is higher than the base voltage, and the fourth switch is turned on, connecting the 3.3V network to the "+3.3Vo_UNWAKE" at the collector terminal of the fourth switch.
[0042] Generally, the second power supply circuit includes a sleep power supply circuit and a wake-up power supply circuit at the same time. For each low-valid signal, its power supply strategy needs to be customized, that is, it is necessary to select to supply power to each low-valid signal through the sleep power supply circuit as the second power supply circuit, or to supply power to it through the wake-up power supply circuit as the second power supply circuit. If it is necessary to change the power supply strategy for a certain low-valid signal, the power supply switch can be quickly realized by changing the welded resistor method.
[0043] The detection circuit 130 specifically includes a first detection circuit 132 and / or a second detection circuit 133. The first detection circuit accesses the externally input low-valid signal to the control chip of the body controller through a voltage-dividing resistor; the second detection circuit accesses the externally input low-valid signal to the control chip of the body controller through a voltage-dividing resistor and a diode.
[0044] Based on the differences in the MCUs in the body controller, different implementation methods are specifically selected. Among them, when there is no protection circuit inside the MCU, the second detection circuit with a diode, that is, a circuit with higher protection, is selected as the actual implementation method. Otherwise, the first detection circuit is selected as the actual implementation method.
[0045] Such as Figure 5 shown, is another specific low-valid signal detection circuit provided by the embodiment of the present invention. In this specific implementation, the low-valid signal is a turn signal feedback signal.
[0046] Since the turn signal feedback signal is a low-valid signal that the body controller does not need to interact with the outside world during low-power operation, the body controller in the detection circuit is powered by "+3.3Vo_UNWAKE" and the resistor R74.
[0047] See Figure 5 , the detection circuit is connected to the outside through the signal network "LED_FRONT". When the "LED_FRONT" signal is externally grounded, the turn signal feedback signal of "LED_FRONT" is accessed to the MCU of the body controller through the voltage division of the resistor R77, the resistor R76, and the resistor R78; or the turn signal feedback signal of "LED_FRONT" is accessed to the MCU of the body controller through the diode D40 and the resistor R76.
[0048] In the embodiment of the present invention, the first power supply circuit and the second power supply circuit are respectively set to supply power to the low-valid signal detection circuit. At the same time, a sleep power supply circuit and a wake-up power supply circuit are provided in the second power supply circuit to pull up the low-valid signals that the body controller needs to interact with the outside world when the vehicle is in low power consumption, and the low-valid signals that the body controller does not need to interact with the outside world when the vehicle is in low power consumption during vehicle sleep and after vehicle startup, so as to balance the power consumption of the body controller when the vehicle is parked alone and the functions that need to be executed normally.
[0049] As Figure 6 shown, it is a flowchart of a low-valid signal detection method provided by an embodiment of the present invention. Combining with the low-valid signal detection circuit as Figure 1 shown, this method is applied to the body controller. The specific steps of this method include: S601, monitor the low-valid signal input from the outside.
[0050] S602, when receiving the low-valid signal, turn on the first power supply circuit to perform a feedback operation through the high-voltage power supply input by the first power supply circuit.
[0051] Specifically, the body controller is powered by the low-voltage power supply input by the second power supply circuit. The second power supply circuit specifically includes a sleep power supply circuit and a wake-up power supply circuit. The sleep power supply circuit is used to pull up the low-valid signals that the body controller needs to interact with the outside world when the vehicle is in low power consumption through the low-voltage power supply during vehicle sleep; the wake-up power supply circuit is used to pull up the low-valid signals that the body controller does not need to interact with the outside world when the vehicle is in low power consumption through the low-voltage power supply after vehicle startup.
[0052] Figure 7 It is a schematic structural diagram of an embodiment of an electronic device in this specification. The electronic device can be a device equipped with a low-valid signal detection circuit as Figure 1 shown, such as an automobile, etc. As Figure 7 shown, the above electronic device may include at least one processor; and at least one memory communicatively connected to the above processing unit, wherein: the memory stores program instructions executable by the processing unit, and the above processor can execute the low-valid signal detection method provided by this embodiment by calling the above program instructions.
[0053] Among them, the above electronic device can be a device capable of having an intelligent conversation with the user, for example: a cloud server. The embodiments of this specification do not limit the specific form of the above electronic device. It can be understood that the electronic device here is the machine mentioned in the method embodiment.
[0054] Figure 7 It shows a block diagram of an exemplary electronic device suitable for implementing the embodiments of this specification. Figure 7The electronic device shown is only an example and should not impose any limitations on the functions and scope of use of the embodiments of this specification.
[0055] As Figure 7 shown, the electronic device is presented in the form of a general-purpose computing device. The components of the electronic device may include, but are not limited to: one or more processors 710, a communication interface 720, a memory 730, and a communication bus 740 that connects different system components (including the memory 730, the communication interface 720, and the processor 710).
[0056] The communication bus 740 represents one or more of several types of bus structures, including a memory bus or a memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the bus structures in a variety of bus structures. For example, these architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnection (PCI) bus.
[0057] The electronic device typically includes a variety of computer system-readable media. These media can be any available media that can be accessed by the electronic device, including volatile and non-volatile media, removable and non-removable media.
[0058] The memory 730 may include computer system-readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The electronic device may further include other removable / non-removable, volatile / non-volatile computer system storage media. The memory 730 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the embodiments of this specification.
[0059] A program / util utility having a set (at least one) of program modules can be stored in the memory 730. Such program modules include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. An implementation of a network environment may be included in each or some combination of these examples. The program modules generally perform the functions and / or methods in the embodiments described in this specification.
[0060] The processor 710 executes various functional applications and data processing by running the programs stored in the memory 730, such as implementing the low-validity signal detection method provided by the embodiments shown in this specification.
[0061] The embodiments of this specification provide a non-transitory computer-readable storage medium. The non-transitory computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to execute the low-validity signal detection method provided by the embodiments shown in this specification.
[0062] The above non-transitory computer-readable storage medium may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage medium include: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer-readable storage medium may be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device.
[0063] The computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries the computer-readable program code. Such a propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium may also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device.
[0064] The program code contained on a computer-readable medium can be transmitted with any appropriate medium, including but not limited to wireless, wire, optical fiber cable, RF, etc., or any suitable combination of the above.
[0065] The computer program code for performing the operations of this specification can be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network including a Local Area Network (LAN) or a Wide Area Network (WAN), or, it can be connected to an external computer (for example, by using an Internet service provider to connect through the Internet).
[0066] The specific embodiments of this specification are described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.
[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this specification, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0068] Any process or method description in the flowchart or described in other ways herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of this specification includes additional implementations, where the functions can be performed in a way that is not shown or discussed, including in a substantially simultaneous manner or in the reverse order according to the functions involved, which should be understood by those skilled in the technical field to which the embodiments of this specification belong.
[0069] Depending on the context, as used herein, the word "if" can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".
[0070] It should be noted that the terminals involved in the embodiments of this specification may include, but are not limited to, personal computers (Personal Computer; hereinafter referred to as: PC), personal digital assistants (Personal Digital Assistant; hereinafter referred to as: PDA), wireless handheld devices, tablet computers (Tablet Computer), mobile phones, MP3 players, MP4 players, etc.
[0071] In the embodiments provided in this specification, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed couplings or direct couplings or communication connections between each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.
[0072] In addition, in each embodiment of this specification, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of a combination of hardware and software functional units.
[0073] The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional units stored in a storage medium include several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (Processor) to execute some steps of the methods described in the embodiments of this specification.
[0074] The above are only the preferred embodiments of this specification and are not intended to limit this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this specification shall be included within the scope of protection of this specification.
Claims
1. A low effective signal detection circuit, characterized in that Comprising: A first power supply circuit, a second power supply circuit and a detection circuit, wherein the detection circuit includes a body controller; The first power supply circuit is used to input a high-voltage power supply to the detection circuit; The second power supply circuit is used to input a low-voltage power supply to the detection circuit to supply power to the body controller in the detection circuit through the low-voltage power supply; The detection circuit is used to receive a low-valid signal input from the outside and perform a feedback operation through the high-voltage power supply when the body controller detects the low-valid signal.
2. The circuit according to claim 1, wherein The second power supply circuit includes: a sleep power supply circuit and a wake-up power supply circuit; The sleep power supply circuit is used to pull up a low-valid signal that the body controller needs to interact with the outside at low power consumption through a low-voltage power supply when the vehicle is in a sleep state; The wake-up power supply circuit is used to pull up a low-valid signal that the body controller does not need to interact with the outside at low power consumption through a low-voltage power supply after the vehicle is started.
3. The circuit according to claim 1, wherein The output end of the body controller is connected to the input ends of the first power supply circuit and the second power supply circuit, and is used to control the first power supply circuit to conduct through a first control signal and control the second power supply circuit to conduct through a second control signal.
4. The circuit according to claim 3, wherein, The first power supply circuit includes: a first switch and a second switch; The first switch is used to close under the action of the first control signal, thereby conducting the second switch; The second switch, based on the conduction of the first switch, provides a high-voltage power supply for the detection circuit through the connected storage battery; Wherein, the first switch is also used to protect the body controller from being burned by the storage battery.
5. The circuit according to claim 4, wherein The first switch is a triode, and the second switch is a MOS tube; The triode is used to pull down the gate of the MOS tube when turned on to connect the source and drain of the MOS tube; The source of the MOS tube is connected to the storage battery, and the drain of the MOS tube is connected to the detection circuit, and is used to supply power to the detection circuit through the storage battery when turned on.
6. The circuit according to claim 3, wherein The second power supply circuit includes: a third switch and a fourth switch; The third switch is used to turn on under the action of the second control signal, thereby conducting the fourth switch; The fourth switch, based on the conduction of the third switch, provides a low-voltage power supply for the detection circuit through the connected low-voltage power supply.
7. The circuit according to claim 6, characterized in that, The third switch and the fourth switch are triodes; The third switch is used to make the emitter voltage of the fourth switch higher than the base voltage when turned on to conduct the fourth switch; The emitter of the fourth switch is connected to the low-voltage power supply, and the collector of the fourth switch is connected to the detection circuit, and is used to supply power to the detection circuit through the low-voltage power supply when turned on.
8. The circuit according to claim 6, characterized in that, The second power supply circuit further includes: a filtering module, and the filtering module includes a filtering capacitor and a filtering resistor; The filtering capacitor is used to filter the output of the second power supply circuit; The filtering resistor is used to release the electrons stored in the filtering capacitor.
9. The circuit according to claim 1, wherein The detection circuit further includes: a first detection circuit, and / or, a second detection circuit; The first detection circuit connects the low-validity signal input from the outside to the control chip of the body controller through a voltage-dividing resistor; The second detection circuit connects the low-validity signal input from the outside to the control chip of the body controller through a voltage-dividing resistor and a diode.
10. A method for detecting a low effective signal, characterized in that The method is applied to the body controller in the detection circuit, and the method includes: Monitoring the low-validity signal input from the outside; When receiving the low-validity signal, turning on the first power supply circuit to perform a feedback operation through the high-voltage power supply input by the first power supply circuit; Wherein, the body controller is powered by a low-voltage power supply input by a second power supply circuit.
11. The method according to claim 10, wherein The second power supply circuit includes: a sleep power supply circuit and a wake-up power supply circuit; The sleep power supply circuit is used to pull up the low-validity signal that the body controller needs to interact with the outside at low power consumption through a low-voltage power supply when the vehicle is in a sleep state; The wake-up power supply circuit is used to pull up the low-validity signal that the body controller does not need to interact with the outside at low power consumption through a low-voltage power supply after the vehicle is started.
12. An electronic device includes the low-validity signal detection circuit according to any one of claims 1-9, and is used to execute the low-validity signal detection method according to any one of claims 10-11.