CN113316528A - Redundant power supply circuit for vehicle and automatic driving control device - Google Patents
Redundant power supply circuit for vehicle and automatic driving control device Download PDFInfo
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- CN113316528A CN113316528A CN202080007639.6A CN202080007639A CN113316528A CN 113316528 A CN113316528 A CN 113316528A CN 202080007639 A CN202080007639 A CN 202080007639A CN 113316528 A CN113316528 A CN 113316528A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
A redundant power supply circuit for a vehicle includes an electronic device (10), a controller (20), a first power supply (30), and a second power supply (40). The electronic equipment (10) is arranged on the vehicle and used for acquiring driving data of the vehicle; the controller (20) is in communication connection with the electronic device (10) and is used for receiving the driving data of the vehicle acquired by the electronic device (10); the controller (20) includes a first volatile storage medium (220), the first volatile storage medium (220) being used for storing the driving data of the vehicle acquired by the electronic device (10); the first power supply (30) is electrically connected with the electronic device (10) and the controller (20) respectively; the second power supply (40) is electrically connected to the first volatile storage medium (220).
Description
Technical Field
The present application relates to the field of autopilot technology, and more particularly, to a redundant power supply circuit and an autopilot control device for a vehicle.
Background
With the continuous development of automatic driving technology, electric vehicles can be safely driven automatically without any human active intervention by means of the cooperative cooperation of artificial intelligence, visual computing, radar, monitoring devices, global positioning systems and the like.
In the design of a power supply system of an automatic driving hardware system, an external power supply (for example, an onboard power supply) is generally adopted, and after voltage reduction, voltage boosting, decoupling, filtering and the like are performed, power is directly supplied to each electronic component in the hardware system. When a hardware system fails, the transient data of the electronic components are transmitted to a controller or a server, usually through software detection or through a mechanical self-destruction device.
Disclosure of Invention
Exemplary embodiments disclosed herein provide a redundant power supply circuit and an automatic driving control apparatus for a vehicle.
One aspect of the present application provides a redundant power supply circuit for a vehicle including an electronic device, a controller, a first power supply, and a second power supply. The electronic device is arranged on the vehicle and used for acquiring driving data of the vehicle. The controller is in communication connection with the electronic equipment and is used for receiving the driving data of the vehicle acquired by the electronic equipment. The controller includes a first volatile storage medium for storing driving data of the vehicle acquired by the electronic device. The first power supply is electrically connected with the electronic device and the controller respectively. A second power supply is electrically connected to the first volatile storage medium.
Another aspect of the present application provides an autopilot control apparatus that includes the redundant power supply circuit described above.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a redundant power supply circuit for a vehicle according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a redundant power supply circuit according to another embodiment of the present application;
FIG. 3 is a schematic diagram of a redundant power supply circuit according to another embodiment of the present application;
FIG. 4 is a schematic diagram of a redundant power supply circuit according to yet another embodiment of the present application;
FIG. 5 is a schematic diagram of a redundant power supply circuit according to yet another embodiment of the present application;
FIG. 6 is a schematic diagram of a redundant power supply circuit according to yet another embodiment of the present application;
FIG. 7 is a block diagram of an autopilot control apparatus according to an embodiment of the subject application;
fig. 8 is a schematic diagram of an internal structure of an automatic driving control apparatus according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The terms "first" and "second", etc., as used in this application, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the term "comprises" and any derivatives thereof, are intended to cover non-exclusive inclusions.
Unless the context clearly dictates otherwise, when an element is referred to as being "connected" to another element in this disclosure, it may be directly connected to the other element or intervening elements may also be present.
For the sake of brevity, unless otherwise defined, when an element is described as being "electrically connected" to another element in this disclosure, it means that the element is in electrical communication with the other element.
As described in the background, in the design of power supply systems for autonomous hardware systems, when a hardware system fails, the transient data of the electronic components are typically transmitted to a controller or server by software detection or by mechanical self-destruction.
However, in the case of software detection, if the software fails to work normally due to a failure of a hardware system storing or running the software, the software cannot normally acquire and process data of the sensor, so that the controller or the server cannot acquire the data of the sensor.
In the case of the mechanical self-destruct apparatus, since the entire automatic driving control system cannot continue to operate once the mechanical self-destruct apparatus is activated, the controller cannot acquire data of each sensor at the moment when the vehicle is in a failure, or although the controller has acquired sensor data, since the controller is powered off due to the intervention of the mechanical self-destruct apparatus, data of the sensors in the volatile storage medium is lost. In addition, mechanical self-destruction devices are typically used only once, which also results in high maintenance costs for the vehicle.
Therefore, in both cases, the vehicle data at the moment of the accident or within a period of time after the accident cannot be acquired or stored when the accident occurs, which is not beneficial to the post analysis of the vehicle fault or the accident reason, and hinders the improvement of the vehicle design.
Various exemplary embodiments of the present application provide a redundant power supply circuit.
Fig. 1 is a schematic structural diagram of a redundant power supply circuit for a vehicle according to an embodiment of the present application, and as shown in fig. 1, the redundant power supply circuit includes an electronic device 10, a controller 20, a first power supply 30, and a second power supply 40.
The electronic device 10 is disposed on the vehicle and is configured to acquire driving data of the vehicle. The first power supply 30 is electrically connected to the electronic device 10 and the controller 20, respectively, and supplies power to the electronic device 10 and the controller 20, respectively. The controller 20 is in communication connection with the electronic device 10 and receives driving data of the vehicle acquired by the electronic device 10; the controller includes a first volatile storage medium 220, the first volatile storage medium 220 for storing driving data of the vehicle acquired by the electronic device. The second power supply 40 is electrically connected to the first volatile storage medium 220.
When the electrical connection of the second power supply 40 to the first volatile storage medium 220 is turned on, the second power supply 40 supplies power to the first volatile storage medium 220. When the second power supply 40 is electrically disconnected from the first volatile storage medium 220, the second power supply 40 stops supplying power to the first volatile storage medium 220. In the present embodiment, the second power supply 40 is in an electrically connected state with the first volatile storage medium 220. Therefore, when a failure occurs between the first power supply 30 and the controller 20, that is, the first power supply 30 fails, or the power supply circuit of the first power supply 30 to the controller 20 fails (for example, short-circuits) to cause the first power supply 30 to fail to supply power to the controller 20, the first volatile storage medium 220 can still be supplied with power from the second power supply 40, so that even if the controller 20 fails to operate due to sudden loss of the first power supply, it can be ensured that the driving data of the vehicle stored on the storage medium is not lost due to power-off of the storage medium.
It is understood that the type of the first volatile storage medium 220 may include, but is not limited to, Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate SDRAM (ddr Random Access Memory, ddr DRAM), Enhanced SDRAM (ESDRAM), SDRAM (Enhanced SDRAM), SDRAM (Dynamic Random Access Memory), SDRAM (DRAM), SDRAM (Dynamic Random Access Memory), RDRAM (Random Direct Access Memory), and RDRAM (Dynamic Random Access Memory, DRAM).
In one embodiment, the controller 20 is an Automatic Driving System (ADS) controller. The ADS controller is provided with an automatic driving program. In the present embodiment, although the controller 20 is an ADS controller, the present application is not limited thereto. The controller 20 may also be another type of controller as long as the controller can receive and store driving data of the vehicle.
In one embodiment, the electronic device 10 includes, but is not limited to, at least one of an On-Board Diagnostics (OBD), a vehicle navigation system, a radar sensor, an environmental camera, an in-vehicle camera, an ultrasonic sensor, a software detection sensor, a speed sensor, a temperature sensor, and the like. Thus, the electronic device 10 can acquire vehicle driving information such as power supply temperature, motor rotation speed, vehicle speed, braking state, and the like. The electronic device 10 is communicatively connected to the controller 20, and transmits these pieces of vehicle driving information as vehicle driving data to the controller 20 in the arrow direction as shown in fig. 1.
In one embodiment, the first power source 30 may be an onboard power source that powers the controller 20 and the plurality of electronic devices 10 after being boosted, reduced, decoupled, filtered, etc. The second power source 40 may be an internal power source of the controller 20, but may also be an external power source. The voltage provided by the second power supply 40 is less than or equal to the voltage provided by the first power supply 30. For example, the first power supply 30 may provide a voltage ranging from 6.5v to 16v, while the second power supply 40 may provide a voltage ranging from 2v to 5 v. In addition, the first power supply 30 and the second power supply 40 are independent power supplies, that is, whether the power supply circuit of the first power supply 30 is turned on or not does not affect the power supply of the second power supply 40 to the first volatile storage medium 220.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a redundant power circuit in another embodiment of the present application. In this embodiment, the controller 20 further includes a wireless communication module 240. The wireless communication module 240 may be electrically connected to the second power source 40, and the second power source 40 simultaneously supplies power to the first volatile storage medium 220 and the wireless communication module 240. The first volatile storage medium 220 is communicatively coupled to the wireless communication module 240. The wireless communication module 240 is provided with a wireless network interface. The wireless communication module 240 is communicatively connected to an external memory (e.g., a cloud server) of the vehicle via a wireless network interface, when the first power source 30 fails, the first volatile storage medium 220 is continuously powered by the second power source 40, and the driving data of the vehicle stored on the first volatile storage medium 220 is relayed to the external memory of the vehicle via the wireless network interface by the wireless communication module.
The wireless communication module 240 may relay the driving data of the vehicle stored in the first volatile storage medium 220 to an external memory of the vehicle via a wireless network interface based on a wireless communication protocol. The Wireless Network may be one of a Wireless Wide Area Network (WWAN), a Wireless Local Area Network (WLAN), a Wireless Metropolitan Area Network (WMAN), or a Wireless Personal Area Network (WPAN). The wireless communication protocol may be a 4G communication protocol or a 5G communication protocol.
It should be noted that, in this embodiment, when the first volatile storage medium 220 and the wireless communication module 240 are powered by the first power supply 30 and the second power supply 40, or the first power supply 30 and the second power supply 40 are powered simultaneously, the wireless communication module 240 may relay the driving data of the vehicle to the external memory of the vehicle via the wireless network interface. However, in other embodiments, the wireless communication module 240 may also be configured to relay the driving data of the vehicle to an external memory outside the vehicle via the wireless network interface when the first volatile storage medium 220 and the wireless communication module 240 are powered only by the second power source 40.
In this way, it is not only ensured that the driving data of the vehicles stored in the first volatile storage medium 220 are not lost due to the failure of the first power supply 30, but also that the driving data of these vehicles are uploaded to, for example, a cloud server, thereby further ensuring the safety of the driving data records of the vehicles.
In one embodiment, the redundant power circuit further includes a glitch buffer circuit 660, and the glitch buffer circuit 660 is connected in series between the first power supply 30 and the controller 20 for providing a buffer voltage for a predetermined time. The wireless communication module 240 relays the driving data of the vehicle stored in the first volatile storage medium 220 through the wireless network interface for the predetermined time after the first power supply 30 is lost by the relay controller 20.
Specifically, when the controller 20 is at time t1When the first power supply 30 is lost, the second power supply 40 continues to supply power to the first volatile storage medium 220 and the wireless communication module 240. Since the first volatile storage medium 220 still has a power source, the driving data of the vehicle already stored in the first volatile storage medium 220 is not lost. The wireless communication module 240 relays the driving data of the vehicles to the cloud server. And at a time t1Within a predetermined period of time, for example, 30 seconds, the wireless communication module 240 continues to relay the driving data of the vehicle received by the first volatile storage medium 220 within the period of time to an external storage outside the vehicle, such as a cloud-side server, through the wireless communication interface.
In this way, the redundant power supply circuit stores the driving data of the vehicle before, during and after the driving on the external memory outside the vehicle, further ensuring the comprehensiveness and safety of the recording of the driving data of the vehicle.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a redundant power supply circuit in another embodiment of the present application. In contrast to the embodiment shown in fig. 1, in the embodiment shown in fig. 3, a first switch control circuit 60 is provided between the second power supply 40 and the first volatile storage medium 220. In the present embodiment, a first terminal of the first switch control circuit 60 is electrically connected to the first volatile storage medium 220, a second terminal of the first switch control circuit 60 is electrically connected to the second power source 40, and a control terminal of the first switch control circuit 60 is electrically connected between the first power source 30 and the controller 20. When the first power supply 30 fails to supply power to the controller 20 due to a failure of itself or a short circuit, the first switch control circuit 60 enters a conducting state to electrically communicate the second power supply 40 with the first volatile storage medium 220, that is, the second power supply 40 can continue to supply power to the first volatile storage medium 220 to ensure that the driving data of the vehicle on the first volatile storage medium 220 is not lost. In one embodiment, when the first power supply 30 supplies power to the controller 20, the first switch control circuit 60 may also be set to an off state, i.e., the second power supply 40 cannot supply power to the first volatile storage medium 220.
Specifically, as shown in fig. 3, the first switch control circuit 60 includes a PMOS Transistor (Positive Channel Metal Oxide Semiconductor Transistor) T1,. First current limiting resistor R1And a second current limiting resistor R2. PMOS transistor T1Is electrically connected to the first volatile storage medium 220, a PMOS transistor T1And is electrically connected to the second power supply 40 through a second current limiting resistor R2. PMOS transistor T1Is electrically connected between the first power supply 30 and the controller 20 through a first current limiting resistor R1. First current limiting resistor R1And a second current limiting resistor R2For PMOS transistor T1The current limiting protection function is realized. The PMOS transistor T is coupled to the first power supply 30 and supplies a voltage to the controller 201Receives a high voltage, so that the PMOS transistor T1Is in an off state. When the first power supply 30 fails or a short circuit occurs in a circuit between the first power supply 30 and the controller 20, the PMOS transistor T1Receives a low voltage, so that the PMOS transistor T1In the on state, the second power supply 40 supplies power to the first volatile storage medium 220. In this way, the turning on and off of the first switch control circuit 60 is controlled, thereby controlling whether the second power supply 40 supplies power to the first volatile storage medium 220.
It is to be noted that although the PMOS transistor T is used in the present embodiment1To implement the functions of the first switch control circuit 60, but those skilled in the art should understand that other electronic components and their combination can be used to implement the same functions, and the description thereof is omitted here.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a redundant power supply circuit in another embodiment of the present application. In contrast to the embodiment shown in fig. 3, the redundant power supply circuit of the embodiment shown in fig. 4 further comprises a glitch buffer circuit 660, the glitch buffer circuit 660 being connected in series between the first power supply 30 and the controller 20. The glitch buffer circuit 660 is configured to continue to provide power to the controller 20 for a predetermined period of time after a fault occurs between the first power supply 30 and the glitch buffer circuit 660. Namely, the glitch buffer circuit 660 is used to provide a buffer voltage when the first power supply 30 fails to provide power to the controller 20, so that the controller 20 is not immediately powered down.
In one embodiment, as shown in FIG. 4, the redundant power supply circuit further includes a first switch control circuit 620 and a first current sensor 640. Unlike the above-described embodiment, in this embodiment, the control terminal of the first switch control circuit 620 is connected to the controller 20. As shown in fig. 4, the first current sensor 640 and the glitch buffer circuit 660 are sequentially connected in series between the first power supply 30 and the controller 20. The first current sensor 640 is also communicatively coupled to the controller 20 to send fault information to the controller 20.
The controller 20 also includes a non-volatile storage medium 260 and a processor 280.
The non-volatile storage medium 260 may include, but is not limited to, a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), or a Flash Memory (Flash).
The processor 280 may include one or any combination of a single chip microcomputer (Microcontroller), an Application Specific Integrated Circuit (ASIC), or a Field Programmable Gate Array (FPGA).
The first current sensor 640 may be used to detect a current signal on a power supply circuit that the first power supply 30 supplies power to the controller 20 and send the current signal to the controller 20. The controller 20 compares the current signal to a preset threshold to determine if a fault has occurred on the power supply circuit. Specifically, the first current sensor 640 sends a detected current signal to the controller. If the current detected by the first current sensor 640 is greater than a predetermined threshold, the current is determined to be too high, i.e., the current is a short-circuit current. Therefore, the controller 20 determines that a short circuit has occurred in the power supply circuit of the first power supply 30 to the controller 20. Then, the controller 20 generates a corresponding control signal and sends the control signal to the control terminal of the first switch control circuit 60 to control the first switch control circuit 60 to be turned on. It is understood that in other embodiments, the first current sensor 640 may also be configured to detect whether the current of the first power supply 30 to the power circuit of the controller 20 is too low. When the current on the power supply circuit is too low, the controller 20 determines that the first power supply 30 is disabled. Then, the controller 20 generates a corresponding control signal and sends the control signal to the control terminal of the first switch control circuit 60 to control the first switch control circuit 60 to be turned on.
In one embodiment, as shown in FIG. 4, glitch buffer circuit 660 includes a diode D and a capacitor C. The anode of the diode D is electrically connected to the first power supply 30, and the cathode of the diode D is electrically connected to the controller 20. The first plate of the capacitor C is grounded, and the second plate of the capacitor C is connected between the cathode of the diode D and the controller. It is understood that other circuit arrangements may be used by those skilled in the art to implement the function of the glitch buffer circuit 660, and will not be described herein.
Further, the nonvolatile storage medium 260 has a failure diagnosis program installed thereon. The fault diagnosis program, when executed by the processor 280, performs the following steps.
Step S100, receiving a current signal sent by a first current sensor;
step S200, determining whether a fault occurs between the first current sensor and the transient interruption buffer circuit according to the current signal;
step S300, when it is determined that a fault occurs between the first current sensor and the transient interruption buffer circuit, sending a control signal to the first switch control circuit to control the first switch control circuit to enter a conducting state.
The operation of the embodiment shown in fig. 4 will now be further explained.
Referring to fig. 4, when the first power supply 30 normally supplies power to the controller 20, the first power supply 30 turns on the diode D and charges the capacitor C, so that the capacitor C has the same voltage as the first power supply 30 when the capacitor C is fully charged. Since the first current sensor 640 does not detect the abnormal current, the fault detection program on the first volatile storage medium 220 of the controller 20 determines that no fault has occurred, so that the controller 20 generates an analog electrical signal of a high level and transmits it to the PMOS transistor T1So that the PMOS transistor T1And (6) cutting off. Therefore, the second power supply 40 cannot supply power to the first volatile storage medium 220.
When the power supply circuit between the first power supply 30 and the glitch buffer circuit 660 is short-circuited, the cathode voltage of the diode D is greater than the anode voltage, so that the diode D is turned off. At this time, the capacitor C starts to supply a gradually decaying voltage to the controller 20 for a preset time period. The capacitance value of the capacitor C is set according to the preset time. The first current sensor 640 detects a short circuit current signal and sends the short circuit current signal to the controller 20. Thus, the fault detection program on the first volatile storage medium 220 of the controller 20 determines that the power supply circuit between the first power supply 30 and the controller 20 is short-circuited according to the short-circuit current signal, thereby generating an analog electrical signal of a low level, and transmitting the analog electrical signal to the PMOS transistor T1So that the PMOS transistor T1And conducting. In this manner, the second power supply 40 may continue to supply power to the first volatile storage medium 220 when the first power supply 30 fails to supply power to the controller 20.
In the present embodiment, by disposing the first current sensor 640 and the transient interruption buffer circuit 660 between the first power supply 30 and the controller 20, it is ensured that the controller 20 is prevented from being immediately powered off when the power supply of the first power supply 30 fails, and the safety of the driving data of the vehicle stored in the first volatile storage medium 220 of the controller 20 is further ensured. In addition, the transient interruption buffer circuit 660 ensures that the controller 20 can still work after the power supply circuit between the first power supply 30 and the controller 20 is short-circuited, so that the controller 20 can continue to control the first switch control circuit 60, and the control accuracy of the redundant power supply circuit is further improved.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a redundant power circuit according to still another embodiment of the present application. In contrast to the embodiment shown in fig. 1, the redundant power supply circuit of the embodiment shown in fig. 5 further comprises an emergency power supply 50. The emergency power supply 50 may be provided to be electrically connectable with the controller 20. In other words, when the first power supply 30 normally supplies power to the controller 20, the emergency power supply 50 does not supply power to the controller 20, and when the first power supply 30 fails to supply power to the controller 20, the emergency power supply 50 starts supplying power to the controller 20. The method of determining whether the first power supply 30 supplies power to the controller 20 has been described in the previous embodiment and will not be described herein.
In one embodiment, the voltage provided by the emergency power supply 50 may be provided directly to the controller 20 without going through a decoupler, filter, isolator, etc. This has the advantage that the emergency voltage can be supplied to the controller 20 more quickly, ensuring that driving data of the vehicle on the first volatile storage medium 220 is not lost. It is understood that a decoupler, filter, isolator, etc. may be provided to decouple, filter, isolate, etc. the voltage provided by the emergency power supply 50 to protect the controller 20.
In one embodiment, the emergency power supply 50 may also be configured to independently power the controller 20 such that the emergency power supply 50 provides power to the controller 20 regardless of whether the first power supply 30 is normally providing power to the controller 20.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a redundant power supply circuit in another embodiment of the present application. In contrast to the embodiment shown in fig. 1, in the present embodiment, the controller 20 includes a non-volatile storage medium 260 and a processor 280. The electronic device 10 includes a driving data sensor 70, and the driving data sensor 70 is used to acquire driving data of the vehicle. For ease of understanding, other electronic devices 10 are removed in fig. 6, and only the driving data sensor 70 is shown. The driving data sensor 70 includes a second volatile storage medium 720.
In one embodiment, the redundant power supply circuit further includes a third power supply 80, a second switch control circuit 622, and a second current sensor 642. The second switch control circuit 622 is provided between the third power source 80 and the driving data sensor 70. A first end of the second switch control circuit 622 is connected to the driving data sensor 70. A second terminal of the second switch control circuit 622 is connected to the third power supply 80. A control terminal of the second switch control circuit 622 is connected to the controller 20, and is used for controlling the on and off of the power supply circuit between the third power source 80 and the driving data sensor 70 according to a control signal sent by the controller 20. The second current sensor 642 is connected in series between the first power supply 30 and the driving data sensor 70, is connected in communication with the controller 20, and is configured to detect a current of a second power supply circuit, which is a power supply circuit between the driving data sensor 70 and the first power supply 30, and transmit a detected current signal to the controller 20. When the driving data sensor 70 is powered by the first power source 30, the third power source 80 is not electrically connected to the driving data sensor 70. When the driving data sensor 70 loses the power supply of the first power source 30, the third power source 80 is electrically connected with the driving data sensor 70 to supply power to the driving data sensor 70. Specifically, when the power supply circuit between the second current sensor 642 and the driving data sensor 70 is out of order, the controller controls the second switch control circuit 622 to enter a conductive state.
In an embodiment, further, the driving data sensor 70 further includes a wireless communication module 740. The wireless communication module 740 is communicatively coupled to the second volatile storage medium 720. The wireless communication module 740 is provided with a wireless network interface, and is in communication connection with an external memory outside the vehicle through the wireless network interface. When the second volatile storage medium 720 is supplied with power only from the third power source 80, the driving data of the vehicle stored on the second volatile storage medium 720 is relayed to an external memory outside the vehicle through the wireless network interface of the wireless communication module 740.
The second volatile storage medium 720, the second switch control circuit 622, and the second current sensor 642 have similar structures and characteristics corresponding to the wireless communication module 240, the first volatile storage medium 220, the first switch control circuit 620, and the first current sensor 640, respectively, and thus are not described herein again.
As shown in fig. 6, the first power supply 30 supplies power to the controller 20 through the first power supply circuit, and supplies power to the driving data sensor 70 through the second power supply circuit. It should be understood that in other embodiments, the driving data sensor 70 and the controller 20 may be powered by different power sources.
The operation principle of the embodiment shown in fig. 6 will be explained.
In the present embodiment, the second current sensor 642 transmits the detected current signal to the controller 20. The controller 20 may compare the detected current signal with a first preset threshold. When the controller 20 determines that the detected current signal is smaller than the first preset threshold, it determines that the first power supply 30 is disabled, and sends a control signal to the second switch control circuit 622 to turn on the second switch control circuit 622.
In another embodiment, the controller 20 may also compare the detected current signal to a second preset threshold. When the controller 20 determines that the detected current signal is greater than the second preset threshold, it determines that the second power supply circuit is short-circuited, and sends a control signal to the second switch control circuit 622, so as to turn on the second control circuit 622.
The fault diagnosis program stored on the non-volatile storage medium 260 of the controller 20 determines whether the second power supply circuit is short-circuited or whether the first power supply 30 fails, based on the current signal detected by the second current sensor 642. The fault diagnosis program, when executed by the processor 280, performs:
step S400, receiving a current signal acquired by a second current sensor;
step S500, determining whether a power supply circuit between the second volatile storage medium and the first power supply is in failure according to the received current signal;
and step S600, when the fact that a power supply circuit between the second volatile storage medium and the first power supply has a fault is determined, controlling the third power supply to supply power to the second volatile storage medium.
For example, when the controller 20 determines that the second power supply circuit is short-circuited, an analog electrical signal of a high level is generated and transmitted to the control terminal of the second switch control circuit 622, so that the second switch control circuit 622 is turned on, thereby allowing the third power supply 80 to supply power to the driving data sensor 70. Therefore, when the first power supply 30 cannot supply power to the driving data sensor 70, the third power supply 80 can continuously supply power to the second volatile storage medium 720 of the driving data sensor 70, so as to ensure that the sensor data stored on the second volatile storage medium 720 cannot be lost due to the fault of the second power supply circuit between the driving data sensor 70 and the first power supply 30, further ensure the safe storage of the driving data of the vehicle detected by the driving data sensor 70, facilitate the improvement of the vehicle design and reduce the fault occurrence rate of the vehicle.
It should be noted that the first power source 30 and the second power source 40 described above may be used with one or both of the emergency power source 50 and the third power source 80. When a plurality of redundant power supplies are adopted simultaneously, the driving data storage, multi-level and comprehensive protection of the vehicle related to the fault can be realized, the post analysis of the vehicle fault is facilitated, and the efficiency of vehicle design improvement is improved.
In one embodiment, the second volatile storage medium is a static random access memory on which the driving data of the vehicle acquired by the driving data sensor is stored. In one embodiment, the voltage of the second power source 40 ranges from 2v to 5 v.
The embodiment of the application also provides an automatic driving control device. The automatic driving control device comprises the redundant power supply circuit of any one of the embodiments.
In one embodiment, as shown in FIG. 7, the autopilot control apparatus further includes a vehicle drive controller communicatively coupled to the redundant power supply circuit. The vehicle driving controller at least comprises a motor controller, a powertrain controller, a transmission system controller, a brake controller and the like. In addition, the autopilot control apparatus may also include an output device (e.g., a display) and an input device (e.g., a touch screen).
After receiving the driving data of the vehicles transmitted by the electronic device 10, the controller 20 compares the driving data of the vehicles with the standard values, generates a control command according to the comparison result, and correspondingly transmits the generated control command to the vehicle driving controller 11 according to the arrow direction in fig. 7, so as to control or adjust the operation parameters of the corresponding vehicle driving controller 11.
In one embodiment, the present application provides an autopilot control device, which may be a terminal, whose internal structure diagram may be as shown in fig. 8. The automatic driving control equipment comprises a processor, a memory, a network interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the autopilot control apparatus is configured to provide computational and control capabilities. The memory of the automatic driving control device includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the automatic driving control device is used for connecting and communicating with an external terminal through a network. The display screen of the automatic driving control equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the configurations shown in figures 1 to 8 are block diagrams of only some of the configurations relevant to the present application and do not constitute a limitation on the devices to which the present application applies, and that a particular device may include more or less components than those shown in the figures, or may combine certain components, or have a different arrangement of components.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), direct bus dynamic RAM (DRDRAM), and Rambus Dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (20)
1. A redundant power supply circuit for a vehicle, comprising:
the electronic equipment is arranged on the vehicle and used for acquiring the driving data of the vehicle;
the controller is in communication connection with the electronic equipment and is used for receiving the driving data of the vehicle acquired by the electronic equipment, wherein the controller comprises a first volatile storage medium which is used for storing the driving data of the vehicle acquired by the electronic equipment;
the first power supply is electrically connected with the electronic equipment and the controller respectively; and
a second power supply electrically connected to the first volatile storage medium.
2. The redundant power supply circuit of claim 1 wherein said controller further comprises wireless communication modules electrically connected to said second power supply and communicatively connected to said first volatile storage medium, respectively, said wireless communication modules being provided with a wireless network interface.
3. A redundant power supply circuit according to claim 1 wherein said first volatile storage medium is a static random access memory on which driving data of said vehicle is stored.
4. The redundant power supply circuit of claim 1 wherein said redundant power supply circuit further comprises a first switch control circuit, a first terminal of said first switch control circuit being electrically connected to said first volatile storage medium, a second terminal of said first switch control circuit being electrically connected to said second power supply, a control terminal of said first switch control circuit being electrically connected between said first power supply and said controller;
wherein the first switch control circuit electrically communicates the second power source and the first volatile storage medium when a fault occurs between the first power source and the controller.
5. The redundant power supply circuit of claim 4, said first switch control circuit comprising a PMOS Transistor (Positive Channel Metal Oxide Semiconductor Transistor), a first current limiting resistor and a second current limiting resistor; a first terminal of the first switch control circuit is electrically connected to the first volatile storage medium; the second end of the PMOS transistor is electrically connected to the second power supply through the second current limiting resistor; the control end of the first switch control circuit is electrically connected between the first power supply and the controller through the first current limiting resistor.
6. The redundant power supply circuit of claim 4, wherein said fault comprises at least one of a short circuit fault or a fault of said first power supply failure.
7. A redundant power supply circuit according to claim 1 wherein said redundant power supply circuit further comprises a glitch buffer circuit connected in series between said first power supply and said controller for providing a buffer voltage to said controller for a predetermined time after a fault occurs between said first power supply and said glitch buffer circuit.
8. A redundant power supply circuit according to claim 7 wherein said redundant power supply circuit further comprises:
a first switch control circuit, a first terminal of which is connected to the first volatile storage medium, a second terminal of which is connected to the second power supply, and a control terminal of which is connected to the controller;
a first current sensor connected in series between the first power supply and the glitch buffer circuit and in communicative connection with the controller.
9. A redundant power supply circuit according to claim 8 wherein said controller further comprises a processor and a non-volatile storage medium having a device fault diagnostic program stored thereon, said processor, when executing said device fault diagnostic program, performing:
receiving a current signal acquired by the first current sensor;
determining whether a fault occurs between the first current sensor and the transient interruption buffer circuit according to the current signal;
and when the fault is determined to occur between the first current sensor and the transient interruption buffer circuit, sending a control signal to the first switch control circuit so as to control the first switch control circuit to enter a conducting state.
10. A redundant power supply circuit according to claim 7 wherein said glitch buffer circuit comprises:
a diode having an anode electrically connected to the first power source and a cathode electrically connected to the controller; and
a capacitor, a first plate of the capacitor being electrically connected to the cathode of the diode and the controller, a second plate of the capacitor being grounded.
11. The redundant power supply circuit of claim 1 further comprising an emergency power supply electrically connected to said controller.
12. A redundant power supply circuit according to claim 11 wherein the voltage provided by said emergency power supply to said controller is provided directly to said controller without going through a decoupler, filter and isolator.
13. The redundant power supply circuit of claim 1 wherein said electronic device is a driving data sensor for acquiring driving data of said vehicle;
the driving data sensor comprises a second volatile storage medium for storing driving data of the vehicle acquired by the sensor;
the redundant power supply circuit further comprises a third power supply;
the third power source is electrically connected to the driving data sensor.
14. The redundant power supply circuit of claim 13 wherein said driving data sensor further comprises a wireless communication module communicatively coupled to said second volatile storage medium; the wireless communication module is provided with a wireless network interface.
15. A redundant power supply circuit according to claim 13 wherein said redundant power supply circuit further comprises:
a second switch control circuit, a first end of the second switch control circuit being connected to the driving data sensor, a second end of the second switch control circuit being connected to the third power supply, a control end of the second switch control circuit being connected to the controller; and
a second current sensor connected in series between the first power source and the driving data sensor, the second current sensor being communicatively connected with the controller.
16. A redundant power supply circuit according to claim 15 wherein said controller further comprises a processor and a non-volatile storage medium having a device fault diagnostic program stored thereon, said processor, when executing said device fault diagnostic program, performing:
receiving a current signal acquired by the second current sensor;
determining whether a power supply circuit between the second volatile storage medium and the first power supply is malfunctioning based on the current signal;
and when determining that a power supply circuit between the second volatile storage medium and the first power supply is in fault, sending a control signal to the second switch control circuit to control the second switch control circuit to enter a conducting state.
17. A redundant power supply circuit according to claim 13 wherein said second volatile storage medium is a static random access memory on which driving data of said vehicle acquired by said driving data sensor is stored.
18. A redundant power supply circuit according to claim 1 wherein the voltage of said second power supply is in the range of 2v to 5 v.
19. An automatic driving control apparatus comprising the redundant power supply circuit of any one of claims 1 to 18.
20. The autonomous driving control apparatus of claim 19, further comprising a vehicle driving controller; the vehicle drive controller is in communicative connection with the controller of the redundant power supply circuit; the vehicle drive controller includes at least a motor controller, a powertrain controller, a driveline controller, or a brake controller.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/091256 WO2021232280A1 (en) | 2020-05-20 | 2020-05-20 | Redundant power supply circuit for vehicle and automatic driving control apparatus |
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| Publication Number | Publication Date |
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| CN113316528A true CN113316528A (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202080007639.6A Pending CN113316528A (en) | 2020-05-20 | 2020-05-20 | Redundant power supply circuit for vehicle and automatic driving control device |
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| CN (1) | CN113316528A (en) |
| WO (1) | WO2021232280A1 (en) |
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| CN114291017A (en) * | 2021-12-31 | 2022-04-08 | 三一智矿科技有限公司 | Vehicle control method, device, system, electronic device and storage medium |
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