The invention discloses an automobile OBD
data acquisition system based on an stm32 single-
chip microcomputer. The
system comprises a PCB top plate, an STM single-
chip microcomputer main body, a central
processing module, a secondary power supply module, a
data analysis module, a program storage module, a communication protocol module, a
data acquisition module, a fault diagnosis module, a communication transmission module, a triaxial
force sensor, a
radio frequency transceiver, a
radio frequency amplifier, a shielding cover, a
USB interface, an upper transmission interface, an upper transmission joint, a lower transmission joint, a lower transmission interface, a PCB bottom plate, a primary power supply module, a pin joint, a box body, a housing, a
signal filtering module, a fault indicating lamp, a lamp hole, an antenna plate, an upper
pole piece, a
lower pole piece, a wire hole and a positioning groove. According to the invention, an stm32 single-
chip microcomputer is used as the MCU unit of an OBD intelligent box, so that the
data processing capacity and the
data acquisition capacity of the
system are improved, the system obtains an
interconnection function, the
instant messaging requirement of
the Internet of Vehicles is met, the market competitiveness of the system is improved, the abnormal value problem of data is avoided, and the accuracy of the data is improved.