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Method and system for recognizing that vehicle-mounted terminal is removed

An in-vehicle terminal and removal technology, applied in the field of vehicle diagnosis, can solve the problems affecting the effectiveness of emission supervision, and achieve the effect of accurate identification

Active Publication Date: 2019-08-23
SHANGHAI XINGRONG AUTOMOBILE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for the vehicle-mounted terminal installed on the market to accurately identify itself when it is removed. This will also provide an opportunity for those who plan to do wrong, and use the equipment loopholes to remove the vehicle-mounted terminal from the vehicle, which has reached the point of avoiding supervision. the goal of
Such a loophole would greatly affect the effectiveness of emissions regulation

Method used

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  • Method and system for recognizing that vehicle-mounted terminal is removed
  • Method and system for recognizing that vehicle-mounted terminal is removed
  • Method and system for recognizing that vehicle-mounted terminal is removed

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Embodiment Construction

[0029] A method for identifying that a vehicle-mounted terminal is removed, comprising:

[0030] 1. Real-time detection of whether the vehicle-mounted terminal loses external power supply.

[0031] 2. If it is detected that the vehicle-mounted terminal loses the external power supply, the resistance value at both ends of the CAN bus is detected.

[0032] In this example, if figure 1 As shown, the resistance value at both ends of the CAN bus is detected by the resistance detection circuit 110 .

[0033] Specifically, such as figure 2 as well as image 3 As shown, the resistance detection circuit 110 includes a single-chip AD module 111, a first switch S1, a second switch S2, a first resistor R S1 and the second resistor R S2 , the single-chip AD module 111 is connected to the controller 120 of the vehicle terminal, and is connected to both ends of the CAN bus through the first switch S1 and the second switch S2 respectively, and the first resistor R is passed between the ...

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Abstract

A method for recognizing that a vehicle-mounted terminal is removed includes the steps that whether the vehicle-mounted terminal loses outer power supplying or not is detected in real time; if it is detected that the vehicle-mounted terminal loses outer power supplying, resistance values of the two ends of a CAN bus are detected; and whether the resistance values are 55-65 ohm or not is judged, and if not, it is recognized that the vehicle-mounted terminal is removed. According to the method, by detecting the resistance values of the two ends of the CAN bus, it is recognized that the vehicle-mounted terminal is removed, recognizing is accurate and effective, it is avoided that a schemer removes the vehicle-mounted terminal from a vehicle through equipment bug, and the purpose of supervising is achieved.

Description

technical field [0001] The present invention relates to the technical field of vehicle diagnosis, in particular to a method and system for identifying the removal of a vehicle-mounted terminal. Background technique [0002] With the continuous tightening of national regulations on heavy-duty motor vehicle exhaust emission supervision, it is a kind of real-time reading of engine OBD information, operation data and emission data to install vehicle-mounted terminal equipment (such as T-Box, OBD terminal equipment, etc.) Very effective regulatory means have increasingly become the regulatory methods that governments at all levels respect. By uploading the data collected by each vehicle-mounted terminal to the supervision platform, it is possible to monitor whether the vehicle's operation and emissions are normal in real time, and to have a more accurate understanding of the heavy-duty vehicle emissions in the entire region. [0003] For heavy-duty vehicles with national six emi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R25/00B60R25/04B60R25/102
CPCB60R25/00B60R25/04B60R25/102
Inventor 蔡继业陈一平
Owner SHANGHAI XINGRONG AUTOMOBILE TECH CO LTD
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