Device and method for in-vehicle device wake-up based on CAN bus
A CAN bus, vehicle-mounted device technology, applied in the field of CAN bus-based vehicle-mounted device wake-up devices, can solve the problems of unusable, poor anti-interference performance, high cost, and achieve the effect of not easy to false trigger and strong anti-interference
Active Publication Date: 2019-08-13
XIAMEN YAXON NETWORKS CO LTD
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Problems solved by technology
Although this invention can realize bus-based vehicle equipment wake-up, it still has a relatively complex structure, high cost, and poor anti-interference performance, and its automotive CAN bus wake-up device itself has power consumption. For some ultra-low power consumption requirements Occasionally unavailable
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[0015] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0016] refer to figure 1 , figure 2 , the preferred vehicle-mounted equipment wake-up device based on the CAN bus of the present invention includes the CAN bus 1 of the vehicle ECU, the vehicle-mounted equipment power management CPU2, the vehicle switch ACC detection circuit 3 and the CAN bus detection wake-up sending module 4, and the vehicle ECU's The CANH end and the CANL end of the CAN bus are the CAN high data and the CAN low data of the CAN bus on the car respectively and are a pair of differential signals. The CAN bus detection wake-up sending module 4 includes an infrared pair tube U1, a closed box, and four resistors. R1, R2, R3, R4 and two capacitors C1, C2, the infrared pair tube U1 is placed in a closed box, the first pin of the infrared emission tube of the infrared pair tube U1 is connected to the CAN bus of the car ECU through the fi...
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The invention relates to the technical field of automobile CAN bus communication, and provides CAN based vehicle-mounted equipment reminding device and method. The CAN based vehicle-mounted equipment reminding device is simple in structure, low in cost, high in interference resistance and free of power consumption. The CAN based vehicle-mounted equipment reminding device comprises a CAN bus of an automobile (Electronic Control Unit), a vehicle-mounted equipment power management CPU, an automobile electric door ACC detection circuit, a CAN bus detection reminding sending module; the CAN bus detection reminding sending module comprises an infrared emitting diode, four resistors and two capacitors; the automobile electric door ACC detection circuit is connected with the input end of the vehicle-mounted equipment power management CPU; the vehicle-mounted equipment power management CPU determines and controls automobile vehicle-mounted equipment to be started / stopped according to the output information of the automobile electric door ACC detection circuit and the CAN bus detection reminding sending module.
Description
technical field [0001] The invention relates to the technical field of automobile CAN (controller area network) bus communication, in particular to a device and method for waking up vehicle-mounted equipment based on the CAN bus. Background technique [0002] At present, the automobile CAN bus has been widely used in various types of automobiles, and the corresponding CAN bus network management is an important technology to ensure the stable operation of automobiles. The network management is mainly used to manage the application information of the power CAN (VBUS) and the body CAN (EBUS) and the sleep wake-up function. Bus dormancy can reduce the static power consumption of the bus, so as to realize the low power consumption of the electronic control unit (ECU), and then turn off the ECU, and finally achieve the purpose of reducing the static power consumption of the whole vehicle; wake-up is to turn on the network function of the ECU, to enable the ECU to start normal fun...
Claims
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IPC IPC(8): G05B19/042
CPCG05B19/042G05B2219/25032
Inventor 林弟蔡运文林志强杨锋陈远汤益明
Owner XIAMEN YAXON NETWORKS CO LTD