On-board monitoring and diagnosis device based on OBD-II (On-Board Diagnostics-II)

A diagnostic device and vehicle-mounted monitoring technology, applied in electrical testing/monitoring and other directions, can solve the problems of large size and cannot be plugged and unplugged, and achieve the effects of small size, easy secondary development, and easy portability

Inactive Publication Date: 2012-03-28
苏州凌创电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current automobile fault monitoring and diagnosis device is large in size

Method used

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  • On-board monitoring and diagnosis device based on OBD-II (On-Board Diagnostics-II)
  • On-board monitoring and diagnosis device based on OBD-II (On-Board Diagnostics-II)
  • On-board monitoring and diagnosis device based on OBD-II (On-Board Diagnostics-II)

Examples

Experimental program
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Example Embodiment

[0023] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0024] Please refer to figure 1 , figure 2 with image 3 In this embodiment, the OBD-II-based vehicle monitoring and diagnosis device provided by the present invention includes a USB serial port module 10, a serial port to KLINE module 20, and an OBD-II connection line 30. The USB serial port module 10 is connected to a DC first power supply voltage +5V to supply power to the module. The first power supply voltage +5V is provided by a PC (computer), and a signal to be converted is transmitted by an external USB Input to the input end of the USB serial port module 10, the serial port to KLINE module 20 is connected to a first power supply voltage +5V provided by a PC (computer) and a second power supply voltage +12V provided by a vehicle battery to power the module The input end of the serial port to KLINE module 20 is connected to the out...

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Abstract

The invention provides an on-board monitoring and diagnosis device based on OBD-II (On-Board Diagnostics-II), which is applicable to an on-board diagnostic protocol (KWP (Keyword Protocol) 2000). The on-board monitoring and diagnosis device comprises a USB (Universal Serial Bus) serial port module, a serial-to-K-line module and an OBD-II connecting line, whererin, the USB serial port module comprises a USB-serial UART (Universal Asynchronous Receiver/Transmitter) interface chip FT232R, and the serial-to-K-line module comprises a single-ended bus transceiver. The on-board monitoring and diagnosis device based on the OBD-II provided by the invention has the advantages of small volume, high conversion rate, plug and play function, protability and strong operability, and can be fully controlled by a host.

Description

technical field [0001] The invention relates to a vehicle-mounted monitoring and diagnosing device, in particular to an OBD-II-based vehicle-mounted monitoring and diagnosing device. Background technique [0002] With the rapid development of electronic technology and control technology, automobile fault diagnosis has been developed to use special monitoring and diagnosis devices. The current online fault diagnosis system for vehicles can continuously monitor and self-diagnose the parameters of the vehicle electronic control system. This system can record the intermittent faults of the electronic control system, making it more convenient and timely to find faults. An on-board diagnostic protocol standard widely used in the European automotive field is KWP2000 (Keyword Protocol 2000), which implements a complete set of on-board diagnostic services and meets the E-OBD (European On Board Diagnose) standard. E-OBD is referred to as OBD (On-Board Diagnostics), that is, "on-board...

Claims

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Application Information

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IPC IPC(8): G05B23/02
Inventor 倪峰
Owner 苏州凌创电子科技有限公司
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