CN113316528B - 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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- CN113316528B CN113316528B CN202080007639.6A CN202080007639A CN113316528B CN 113316528 B CN113316528 B CN 113316528B CN 202080007639 A CN202080007639 A CN 202080007639A CN 113316528 B CN113316528 B CN 113316528B
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- 208000037408 Device failure Diseases 0.000 claims 2
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Classifications
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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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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (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 is used for acquiring driving data of the vehicle; the controller (20) is in communication connection with the electronic equipment (10) and is used for receiving driving data of the vehicle acquired by the electronic equipment (10); the controller (20) comprises a first volatile storage medium (220), the first volatile storage medium (220) being for storing driving data of the vehicle acquired by the electronic device (10); the first power supply (30) is electrically connected with the electronic equipment (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 application relates to the technical field of automatic driving, in particular to a redundant power supply circuit for a vehicle and an automatic driving control device.
Background
With the continuous development of automatic driving technology, electric automobiles rely on cooperation of artificial intelligence, visual computing, radar, monitoring devices, global positioning systems and the like, and can be safely driven without any active intervention of human beings.
In the design of a power supply system of an automatic driving hardware system, an external power supply (such as an on-board power supply) is generally adopted, and after the processes of voltage reduction, voltage boosting, decoupling, filtering and the like, power is directly supplied to each electronic component in the hardware system. When a hardware system fails, the instantaneous data of the electronic components are usually transmitted to a controller or a server through software detection or through a mechanical self-destruction device.
Disclosure of Invention
Various exemplary embodiments of the present disclosure provide a redundant power supply circuit and an automatic driving control apparatus for a vehicle.
In one aspect, the application provides a redundant power supply circuit for a vehicle that includes 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 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 equipment and the controller respectively. A second power source 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 of the embodiments of the present application, the drawings that are needed 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
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 another embodiment of the present application;
FIG. 5 is a schematic diagram of a redundant power supply circuit according to another embodiment of the present application;
FIG. 6 is a schematic diagram of a redundant power supply circuit according to another embodiment of the present application;
FIG. 7 is a block diagram of an autopilot control arrangement according to one embodiment of the present application;
fig. 8 is a schematic view of an internal structure of an automatic driving control apparatus in an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. Throughout this specification, the same or similar reference numerals indicate the same or similar structures, elements or processes. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The terms "first" and "second" and the like used in the present 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 defining "a first" and "a second" may explicitly or implicitly include one or more such feature. In addition, the term "include" and any derivatives thereof is intended to cover a non-exclusive inclusion.
When an element is referred to in the present disclosure as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present unless the context clearly dictates otherwise.
For purposes of brevity, unless otherwise defined, when an element is described as being "electrically connected" to another element in this disclosure means that the one element is in electrical communication with the other element.
As described in the background, in the design of power supply systems for automatic driving hardware systems, when the hardware system fails, the instantaneous data of the electronic components are usually transmitted to a controller or a server by software detection or by a mechanical self-destruction device.
However, in the case of software detection, if the software cannot work normally due to a failure of a hardware system storing or running the software, the software cannot acquire and process the data of the sensor normally, so that the controller or the server cannot acquire the data of the sensor.
In the case of a mechanical self-destruct device, the entire autopilot control system cannot continue to operate once the mechanical self-destruct device is activated, resulting in the controller not being able to acquire data from each sensor of the vehicle at the instant of failure, or the controller having acquired sensor data, but being powered down due to the intervention of the mechanical self-destruct device, resulting in loss of data from the sensors in the volatile storage medium. Furthermore, mechanical self-destruct devices are typically used only once, which also results in high maintenance costs for the vehicle.
Therefore, both of the above cases cause failure to acquire or store vehicle data at the moment of occurrence of an accident or for a period of time after occurrence of an accident, which is disadvantageous for post analysis of the cause of the accident or the failure of the vehicle, and hinders improvement of the design of the vehicle.
Exemplary embodiments of the present application provide a redundant power supply circuit.
Fig. 1 is a schematic 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 comprises a first volatile storage medium 220, the first volatile storage medium 220 being used 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 source 40 to the first volatile storage medium 220 is turned on, the second power source 40 supplies power to the first volatile storage medium 220. When the electrical connection of the second power source 40 to the first volatile storage medium 220 is broken, the second power source 40 stops supplying power to the first volatile storage medium 220. In the present embodiment, the second power source 40 is in an electrically connected state with the first volatile storage medium 220. Therefore, when the first power source 30 fails to the controller 20, that is, the first power source 30 fails, or the power supply circuit from the first power source 30 to the controller 20 fails (e.g., a short circuit) to cause the first power source 30 to fail to supply power to the controller 20, the first volatile storage medium 220 can still be continuously supplied with power by the second power source 40, so that even if the controller 20 fails to operate due to sudden loss of the first power source, it can be ensured that the driving data of the vehicle stored on the storage medium is not lost due to power failure of the storage medium.
It is to be appreciated that the types of first volatile storage medium 220 may include, but are not limited to, static random access memory (Static Random Access Memory, SRAM), dynamic random access memory (Dynamic Random Access Memory, DRAM), synchronous dynamic random access memory (Synchronous Dynamic Random Access Memory, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate Synchronous Dynamic Random Access Memory, ddr SDRAM), enhanced synchronous dynamic random access memory (Enhanced Synchronous Dynamic Random Access Memory, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DYNAMIC Random Access Memory, SLDRAM), memory bus direct random access memory (Rambus Direct Random Access Memory, RDRAM), and memory bus dynamic random access memory (Rambus Dynamic Random Access Memory, RDRAM), among others.
In one embodiment, the controller 20 is an Automated DRIVING SYSTEM, ADS controller. An automatic driving program is installed in the ADS controller. 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 other types of controllers 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 diagnostic system (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 rotational speed sensor, a temperature sensor, and the like. Accordingly, the electronic device 10 may obtain vehicle driving information such as power supply temperature, motor speed, vehicle speed, braking status, etc. 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 on-board power source, and is configured to supply power to the controller 20 and the plurality of electronic devices 10 after boosting, reducing, decoupling, filtering, and the like. 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 source 30 may provide a voltage in the range of 6.5v to 16v, and the second power source 40 may provide a voltage in the range of 2v to 5v. 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 diagram of a redundant power supply circuit according to another embodiment of the application. In this embodiment, the controller 20 also 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 supplies power to both 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, and when the first power supply 30 fails, the first volatile storage medium 220 is continuously supplied with power by the second power supply 40, and driving data of the vehicle stored on the first volatile storage medium 220 is relayed to the external memory of the heat and vehicle via the wireless network interface through the wireless communication module.
The wireless communication module 240 may relay 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 (WIRELESS WIDE AREA Network, WWAN), a wireless local area Network (Wireless Local Area Network, WLAN), a wireless metropolitan area Network (Wireless Metropolitan Area Network, WMAN), or a wireless personal area Network (Wireless Personal Area Network, WPAN). The wireless communication protocol may be a 4G communication protocol or a 5G communication protocol.
In this embodiment, when the first volatile storage medium 220 and the wireless communication module 240 are powered by the first power source 30, the second power source 40, or both the first power source 30 and the second power source 40, 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. In other embodiments, however, the wireless communication module 240 may also be configured to relay the driving data of the vehicle to an external memory external to 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, not only is it ensured that the driving data of the vehicles stored in the first volatile storage medium 220 are not lost due to failure of the first power supply 30, but also that the driving data of these vehicles are all uploaded to, for example, a cloud server, thereby further ensuring the safety of the driving data records of the vehicles.
In an embodiment, the redundant power supply circuit is further provided with a transient cut-off buffer circuit 660, and the transient cut-off buffer circuit 660 is connected in series between the first power supply 30 and the controller 20, for providing a buffer voltage for a preset time. The wireless communication module 240 relays driving data of the vehicle stored in the first volatile storage medium 220 through the wireless network interface for the predetermined time after the controller 20 loses the first power supply 30.
Specifically, when the controller 20 loses the first power source 30 at time t 1, the second power source 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 power, the driving data of the vehicle that has been stored in the first volatile storage medium 220 is not lost. The wireless communication module 240 relays the driving data of these vehicles to the cloud server. And within a predetermined period of time, for example, 30 seconds, after the time t 1, the wireless communication module 240 continues to relay the driving data of the vehicle received by the first volatile storage medium 220 to an external memory, such as a cloud server, outside the vehicle through the wireless communication interface during the period of time.
In this way, the redundant power supply circuit stores all the driving data of the vehicle in advance, in advance and after in the external memory outside the vehicle, thereby further guaranteeing the comprehensiveness and safety of the driving data record of the vehicle.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a redundant power supply circuit according to another embodiment of the 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 this embodiment, a first end of the first switch control circuit 60 is electrically connected to the first volatile storage medium 220, a second end of the first switch control circuit 60 is electrically connected to the second power source 40, and a control end 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 its failure or short circuit, the first switch control circuit 60 enters a conductive state, electrically connecting the second power supply 40 and the first volatile storage medium 220, i.e. the second power supply 40 may continue to supply power to the first volatile storage medium 220, so as to ensure that the driving data of the vehicle on the first volatile storage medium 220 is not lost. In an embodiment, when the first power source 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 source 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) T 1. A first current limiting resistor R 1 and a second current limiting resistor R 2. The first terminal of PMOS transistor T 1 is electrically connected to the first volatile storage medium 220, and the second terminal of PMOS transistor T 1 is electrically connected to the second power supply 40 through the second current limiting resistor R2. The control terminal of the PMOS transistor T 1 is electrically connected between the first power supply 30 and the controller 20 through a first current limiting resistor R1. the first current limiting resistor R 1 and the second current limiting resistor R 2 perform a current limiting protection function on the PMOS transistor T 1. When the first power supply 30 supplies a voltage to the controller 20, the control terminal of the PMOS transistor T 1 receives a high voltage, and thus the PMOS transistor T 1 is turned off. When the first power supply 30 fails or a short circuit occurs between the first power supply 30 and the controller 20, the control terminal of the PMOS transistor T 1 receives a low voltage, so that the PMOS transistor T 1 is in a conductive state, and the second power supply 40 supplies power to the first volatile storage medium 220. In this way, the first switch control circuit 60 is controlled to be turned on and off, thereby controlling whether the second power source 40 supplies power to the first volatile storage medium 220.
It should be noted that, although the PMOS transistor T 1 is used to implement the function of the first switch control circuit 60 in the present embodiment, those skilled in the art should appreciate that other electronic components and combinations thereof may be used to implement the same function, and the detailed description thereof is omitted herein.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a redundant power supply circuit according to another embodiment of the 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 transient cut-off buffer circuit 660, said transient cut-off buffer circuit 660 being connected in series between the first power supply 30 and said controller 20. The transient cut buffer circuit 660 is used to continue supplying power to the controller 20 for a preset period of time after a fault occurs between the first power supply 30 and the transient cut buffer circuit 660. The instant-off buffer circuit 660 is used to provide a buffer voltage so that the controller 20 is not immediately powered down when the first power supply 30 fails to provide power to the controller 20.
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 instantaneous interruption buffer circuit 660 are sequentially connected in series between the first power source 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, read-Only Memory (ROM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable programmable Read-Only Memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-Only Memory, EEPROM), or Flash Memory (Flash).
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 (Field Programmable GATE ARRAY, FPGA).
The first current sensor 640 may be used to detect a current signal on a power supply circuit where 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 preset 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 will be appreciated that in other embodiments, the first current sensor 640 may also be configured to detect whether the current on the power circuit of the controller 20 by the first power supply 30 is too low. When the current on the power supply circuit is too low, the controller 20 determines that the first power supply 30 fails. 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, the transient break buffer circuit 660 includes a diode D and a capacitor C. The anode of the diode D is electrically connected to the first power source 30, and the cathode of the diode D is electrically connected to the controller 20. The first polar plate of the capacitor C is grounded, and the second polar plate of the capacitor C is connected between the cathode of the diode D and the controller. It will be appreciated that other circuit arrangements may be used by those skilled in the art to implement the functions of the transient break buffer circuit 660, and will not be described in detail herein.
Further, a failure diagnosis program is installed on the nonvolatile storage medium 260. 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 200, determining whether a fault occurs between the first current sensor and the instantaneous interruption buffer circuit according to the current signal;
and step S300, when the first current sensor and the instantaneous interruption buffer circuit are determined to have faults, a control signal is sent to the first switch control circuit so as to control the first switch control circuit to enter a conducting state.
The working principle of the embodiment shown in fig. 4 will be further described.
With continued reference to fig. 4, when the first power supply 30 supplies power to the controller 20 normally, 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 it is full. 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 a high-level analog electric signal and transmits it to the control terminal of the PMOS transistor T 1, so that the PMOS transistor T 1 is turned off. Thus, the second power supply 40 cannot supply power to the first volatile storage medium 220.
When a short circuit occurs in the power supply circuit between the first power supply 30 and the instantaneous interruption buffer circuit 660, the negative voltage of the diode D is greater than the positive voltage, so that the diode D is turned off. At this time, the capacitor C starts to supply the controller 20 with the gradually decaying voltage for a preset period of time. The capacitance value of the capacitor C is set according to the magnitude of the preset time. The first current sensor 640 detects a short-circuit current signal and transmits the short-circuit current signal to the controller 20. Accordingly, 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 shorted according to the short-circuit current signal, so as to generate a low-level analog electrical signal, and the low-level analog electrical signal is transmitted to the control terminal of the PMOS transistor T 1, so that the PMOS transistor T 1 is turned on. In this manner, the second power source 40 may continue to supply power to the first volatile storage medium 220 when the first power source 30 fails to supply power to the controller 20.
In the present embodiment, by disposing the first current sensor 640 and the instantaneous interruption buffer circuit 660 between the first power source 30 and the controller 20, it is ensured that when the power supply of the first power source 30 fails, the controller 20 is prevented from being immediately powered off, 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 instantaneous 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 continuously 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 supply circuit according to another embodiment of the application. In contrast to the embodiment shown in fig. 1, the redundant power supply circuit of the embodiment shown in fig. 5 also 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 source 30 normally supplies power to the controller 20, the emergency power source 50 does not supply power to the controller 20, and when the first power source 30 fails to supply power to the controller 20, the emergency power source 50 starts supplying power to the controller 20. The method of determining whether the first power source 30 supplies power to the controller 20 has been described in the previous embodiment, and will not be described again.
In one embodiment, the voltage provided by the emergency power supply 50 may be provided directly to the controller 20 without passing through a decoupler, filter, isolator, or the like. This has the advantage that the controller 20 can be supplied with the emergency voltage faster, ensuring that the driving data of the vehicle on the first volatile storage medium 220 is not lost. It will be appreciated that decouplers, filters, isolators, etc. may be provided to decouple, filter, isolate, etc. the voltage provided by the emergency power source 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 powers the controller 20 whether or not the first power supply 30 is normally powering the controller 20.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating a redundant power supply circuit according to another embodiment of the application. In contrast to the embodiment shown in fig. 1, in this 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, the driving data sensor 70 being for acquiring 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 an embodiment, further, 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 supply 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. The 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 supply 80 and the driving data sensor 70 according to the 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, detects 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 transmits a detected current signal to the controller 20. The third power supply 80 is not electrically connected to the driving data sensor 70 when the driving data sensor 70 is powered 30 by the first power supply. When the driving data sensor 70 loses the power of the first power source 30, the third power source 80 is electrically connected to the driving data sensor 70 to supply the 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 fails, the controller controls the second switch control circuit 622 to enter a conductive state.
In one 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 through which it is communicatively connected to an external memory outside the vehicle. When the second volatile storage medium 720 is powered only by the third power supply 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 to those of 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.
As shown in fig. 6, the first power supply 30 supplies power to the controller 20 through a first power supply circuit, and supplies power to the driving data sensor 70 through a second power supply circuit. It should be appreciated that in other embodiments, the drive data sensor 70 and the controller 20 may be powered by different power sources.
Next, 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 to a first preset threshold. When the controller 20 determines that the detected current signal is less 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 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 shorted, and sends a control signal to the second switch control circuit 622 to turn on the second control circuit 622.
The fault diagnosis program stored on the nonvolatile storage medium 260 of the controller 20 determines whether the second power supply circuit is shorted or whether the first power supply 30 is failed according to 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 fails according to the received current signal;
and step S600, when the power supply circuit between the second volatile storage medium and the first power supply is determined to have faults, 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 shorted, a high-level analog electric signal 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 causing 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 that the sensor data stored on the second volatile storage medium 720 is prevented from being lost due to the failure of the second power supply circuit between the driving data sensor 70 and the first power supply 30, the safe storage of the driving data of the vehicle detected by the driving data sensor 70 is further ensured, the improvement of the vehicle design is facilitated, and the failure occurrence rate of the vehicle is reduced.
It should be noted that the first power source 30 and the second power source 40 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 faults can be realized, the post analysis of the vehicle faults is facilitated, and the efficiency of improving the vehicle design is improved.
In an embodiment, the second volatile storage medium is a static random access memory, and the driving data of the vehicle acquired by the driving data sensor is stored in the static random access memory. In one embodiment, the voltage of the second power source 40 ranges from 2v to 5v.
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 embodiment.
In one embodiment, as shown in fig. 7, the autopilot control apparatus further includes a vehicle drive controller in communication with the redundant power supply circuit. The vehicle driving controller at least comprises a motor controller, a power assembly controller, a transmission system controller, a brake controller or the like. Furthermore, the automatic driving control apparatus may further 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 from the electronic device 10, the controller 20 compares the driving data of the vehicles with the standard values, generates control instructions according to the comparison results, and correspondingly transmits the generated control instructions to the vehicle driving controllers 11 in the arrow directions as in fig. 7, so as to control or adjust the operation parameters of the corresponding vehicle driving controllers 11.
In one embodiment, the present application provides an automatic driving control apparatus, which may be a terminal, and an internal structure thereof may be as shown in fig. 8. The autopilot control apparatus includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the autopilot control apparatus is configured to provide computing and control capabilities. The memory of the automatic driving control apparatus 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 the operating system and computer programs in the non-volatile storage media. The network interface of the automatic driving control device is used for communicating with an external terminal through a network connection. The display screen of the automatic driving control device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the computer device, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by persons skilled in the art that the structures shown in fig. 1-8 are block diagrams of only some of the structures associated with the present inventive arrangements and do not constitute a limitation of the apparatus to which the present inventive arrangements may be applied, and that a particular apparatus may include more or less components than those shown, or may combine some components, or have a different arrangement of components.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile 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 memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (14)
1. A redundant power supply circuit for a vehicle, comprising:
the driving data sensor is arranged on the vehicle and used for acquiring driving data of the vehicle, and comprises a second volatile storage medium which is used for storing the driving data of the vehicle acquired by the sensor; the driving data comprise at least one of power supply temperature, motor rotation speed, vehicle speed and braking state;
the controller is in communication connection with the driving data sensor and is used for receiving the driving data of the vehicle acquired by the driving data sensor, wherein the controller comprises a first volatile storage medium, a wireless communication module, a processor and a nonvolatile storage medium, the first volatile storage medium is used for storing the driving data of the vehicle acquired by the driving data sensor, the wireless communication module is in communication connection with the first volatile storage medium, and a wireless network interface is arranged on the wireless communication module;
The first power supply is electrically connected with the driving data sensor and the controller respectively; and
The second power supply is electrically connected with the first volatile storage medium and the wireless communication module and is used for respectively supplying power to the first volatile storage medium and the wireless communication module when a fault occurs between the first power supply and the controller;
the third power supply is electrically connected with the driving data sensor;
a PMOS transistor (Positive CHANNEL METAL Oxide Semiconductor Transistor), a first current limiting resistor and a second current limiting resistor; a first end of the PMOS transistor is electrically connected to the first volatile storage medium; a 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 PMOS transistor is electrically connected between the first power supply and the controller through the first current limiting resistor; when a fault occurs between the first power supply and the controller, the PMOS transistor and the second current limiting resistor are electrically communicated with the second power supply and the first volatile storage medium;
A second switch control circuit, a first end of which is connected to the driving data sensor, a second end of which is connected to the third power supply, and a control end of which is connected to the controller;
A second current sensor connected in series between the first power source and the driving data sensor, the second current sensor being communicatively connected to the controller;
Wherein the wireless communication module is configured to relay driving data of the vehicle stored on the first volatile storage medium to an external memory of the vehicle via the wireless network interface when a first power supply fails; the nonvolatile storage medium has a device failure diagnosis program stored thereon, and when the processor executes the device failure diagnosis program, the processor executes: receiving a current signal acquired by the second current sensor; determining, based on the current signal, whether a power supply circuit between the second volatile storage medium and the first power supply is malfunctioning; and when the power supply circuit between the second volatile storage medium and the first power supply is determined to be faulty, sending a control signal to the second switch control circuit so as to control the second switch control circuit to enter a conducting state.
2. The redundant power supply circuit of claim 1 wherein the first volatile storage medium is a static random access memory, the driving data of the vehicle being stored on the static random access memory.
3. The redundant power supply circuit of claim 1 wherein the fault comprises at least one of a short circuit fault or a fault in which the first power supply fails.
4. The redundant power supply circuit of claim 1 further comprising a transient cut buffer circuit connected in series between the first power supply and the controller for providing a buffer voltage to the controller for a preset time after a fault occurs between the first power supply and the transient cut buffer circuit.
5. The redundant power supply circuit of claim 4 wherein the redundant power supply circuit further comprises:
And the first current sensor is connected in series between the first power supply and the instantaneous interruption buffer circuit and is connected with the controller in a communication way.
6. The redundant power supply circuit of claim 5 wherein the controller further comprises a processor and a non-volatile storage medium having a device fault diagnosis program stored thereon, the processor, when executing the device fault diagnosis program, executing:
receiving a current signal acquired by the first current sensor;
determining whether a fault occurs between the first current sensor and the instantaneous interruption buffer circuit according to the current signal;
And when the first current sensor and the instantaneous interruption buffer circuit are determined to have faults, a control signal is sent to the PMOS transistor so as to control the PMOS transistor to enter a conducting state.
7. The redundant power supply circuit of claim 4 wherein said instantaneous disconnect buffer circuit comprises:
A diode, the anode of the diode is electrically connected to the first power supply, and the cathode of the diode is electrically connected to the controller; and
And the first polar plate of the capacitor is electrically connected to the cathode of the diode and the controller, and the second polar plate of the capacitor is grounded.
8. The redundant power supply circuit of claim 1 further comprising an emergency power supply electrically connected to the controller.
9. The redundant power supply circuit of claim 8 wherein the voltage provided by the emergency power supply to the controller is provided directly to the controller without passing through a decoupler, filter, and isolator.
10. The redundant power supply circuit of claim 1 wherein the driving data sensor further comprises a wireless communication module in communication with the second volatile storage medium; the wireless communication module is provided with a wireless network interface.
11. The redundant power supply circuit of claim 1 wherein the second volatile storage medium is a static random access memory, the driving data of the vehicle acquired by the driving data sensor being stored on the static random access memory.
12. The redundant power supply circuit of claim 1 wherein the voltage of the second power supply ranges from 2v to 5v.
13. An automatic driving control device comprising the redundant power supply circuit of any one of claims 1 to 12.
14. The automatic driving control device according to claim 13, further comprising a vehicle driving controller; the vehicle driving controller is in communication 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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| CN113316528A CN113316528A (en) | 2021-08-27 |
| CN113316528B true CN113316528B (en) | 2024-06-28 |
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| CN114291017B (en) * | 2021-12-31 | 2024-06-18 | 三一智矿科技有限公司 | Vehicle control method, device, system, electronic equipment and storage medium |
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