The invention discloses a vehicle running
information acquisition device based on a CAN (Controller
Area Network)
bus, comprising a processor module, a storage module, a
CAN bus communication module and a
voltage comparison module, wherein the storage module, the
CAN bus communication module and the
voltage comparison module are respectively connected with the processor module; input signals of the
voltage comparison module are switching value signals and pulse value signals which are output by vehicle equipment, and the output end of the voltage comparison module is connected with the processor module; analog value signals output by the vehicle equipment are processed by an engine ECU (
Electronic Control Unit), then transmitted to the
CAN bus and received by the CAN
bus communication module; the CAN
bus communication module is also used for receiving other equipment signals hung on the CAN bus; and the output end of the CAN bus communication module is connected with the processor module through an SPI (Serial
Peripheral Interface) bus. The device can be used for acquiring various equipment information on the vehicle, the acquisition is more convenient and comprehensive, and references are provided for the aspects of
oil consumption management, driver operation specifications, the judgment of whether the power configuration of the vehicle design is reasonable or not as well as the improvement and the judgment on whether the vehicle needs to be maintained or not according to acquired data.