US 12,327,437 B2
Automobile diagnosis device, system and method
Huaming Chen, Guangdong (CN); and Haibo Pang, Guangdong (CN)
Assigned to AUTEL INTELLIGENT TECHNOLOGY CORP., LTD., Shenzhen (CN)
Filed by AUTEL INTELLIGENT TECHNOLOGY CORP., LTD., Guangdong (CN)
Filed on Apr. 22, 2022, as Appl. No. 17/660,247.
Application 17/660,247 is a continuation of application No. PCT/CN2020/125872, filed on Nov. 2, 2020.
Claims priority of application No. 201911076893.7 (CN), filed on Nov. 6, 2019.
Prior Publication US 2022/0245972 A1, Aug. 4, 2022
Int. Cl. G07C 5/00 (2006.01); B60R 16/023 (2006.01); G07C 5/08 (2006.01); H04L 12/40 (2006.01)
CPC G07C 5/008 (2013.01) [B60R 16/0231 (2013.01); G07C 5/0808 (2013.01); H04L 12/40 (2013.01); H04L 2012/40215 (2013.01); H04L 2012/40273 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An automobile diagnosis device, comprising:
an automatic diagnosis circuit configured to acquire vehicle identification information of an automobile to be diagnosed;
a standard communication bus circuit electrically connected to the automatic diagnosis circuit;
several diagnostic communication bus circuits comprising at least one of a 24V CAN bus circuit, an FDCAN bus circuit, a PLC bus circuit, and a DoIP bus circuit, the several diagnostic communication bus circuits supporting communication protocols of several kinds of different automobile types;
a communication module; and
a controller electrically connected to the automatic diagnosis circuit, the standard communication bus circuit, each of the several diagnostic communication bus circuits, and the communication module respectively, the controller configured to select a target communication bus circuit according to the vehicle identification information, communicate with the automobile to be diagnosed via the target communication bus circuit so as to acquire diagnostic data of the automobile to be diagnosed, and send the diagnostic data to a host computer via the communication module, wherein the target communication bus circuit comprises one diagnostic communication bus circuit or the standard communication bus circuit;
wherein the 24V CAN bus circuit comprises:
a CAN receiving circuit electrically connected to the controller, and configured to receive data sent by the controller according to vehicle identification information and outputting a differential signal; and
a CAN transmission circuit electrically connected to the CAN receiving circuit and the controller respectively, and configured to enable the controller to communicate with the automobile to be diagnosed according to the differential signal, and forward the diagnostic data to the controller;
wherein the CAN receiving circuit comprises:
a first buffer circuit electrically connected to the controller, and configured to buffer the vehicle identification information;
a first level conversion circuit electrically connected to the first buffer circuit, and configured to convert buffered vehicle identification information into a first level signal;
a second buffer circuit electrically connected to the first buffer circuit, and configured to receive the vehicle identification information from the first buffer circuit, and secondly buffer the vehicle identification information; and
a second level conversion circuit electrically connected to the second buffer circuit, and configured to convert the vehicle identification information after secondary buffering into a second level signal, wherein the first level signal and the second level signal constitute the differential signal and are output to the CAN transmission circuit.