remote monitoring of vehicle diagnostics

8/7/2019 Remote Monitoring of Vehicle Diagnostics

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Remote Monitoring of VehicleDiagnostics

Arjun Sajeev

09MMT002

Project Guide

Prof. S. Senthil Kumar


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Objectives

To build a prototype wireless vehicle/mobile dataacquisition system and test its feasibility forcommercial use.

To develop a data transmission system, that collectssensor data and transmits it intermittently over awireless link.

To develop software/hardware needed to receive thetransmitted data, and display it as a log, on a remote-PC.

To develop an algorithm that analyzes the receiveddata that enable to diagnose/detect faults. (Off-boardDiagnostics)


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Motivation

Medium state monitoring: to achieve medium

pressure, liquid level, gas leakage and

temperature detection. (Eg: Freight trucks)

Speed Regulation (In-vehicle instead of police

checkpoints)

Data acquisition application in Military and

Defense sectors

Theft detection/Vehicle lock-down


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Assessment of Wireless Transmission

Schemes


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Choice of medium for wireless

communication:

We choose Zigbee because of the low power

consumption and low cost requirement.

Range is limited but the project aims atbuilding a prototype network, which can later

be expanded to increase range.


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Smart Box Design Objectives:

To develop onboard Smart Box that captures 4running parameters such as: Intake manifold pressure

Engine coolant temperature

Engine RPM

Fuel Level

Required data rate: 2 data points per second

Data should be transmitted through the on-board

transceiver. Smart box should be made rugged as it will be

susceptible to practical operating conditions such asheat, vibration, etc.


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Proposed hardware specifications for

the Smart Box

PIC18LF4585/23 microcontroller

Zig bee communications module XBEE(transceivers x 2)- serial communication

PCB with required MAX232 drivers, etc

LM35 temperature sensor

695A Pressure sensor

Speed Sensor

Level Sensor


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Transmitter Block Diagram


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Receiver Block Diagram

Zigbee receiver

Demodulator circuit

Max232 interface

PC and GUI(LabView/MATLAB)


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PIC18LF4585

SPI and UART Interfaces

10 bit A/D conversion

24Kx16 Program memory

3.25Kx8 RAM memory


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Data Analysis

By comparing received sensor values with lookuptables that list permissible limits, error can becalculated.

This analysis can be carried out using Markovchains/Artificial Neural Networks/Fuzzy Logic.

Eg:

Anomalous changes in acceleration can indicate problemswith the power train. Diagnosis: Possible Gearboxmalfunction.

High coolant temp. could indicate overheating problems.Diagnosis: Possible Cooling fan malfunction.


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Plan ofAction


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Conclusion

A successful remote data acquisition system fordetecting vehicle faults will be developed thatwill:

Be robust to harsh environmental operatingconditions

Have low latency

Provide accurate diagnosis/prognosis based on the

received sensor data Have scope for future expansion work such as:

integration of GPS data for vehicle position data

switching to transmission methodologies such as GPRS/GSM


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References

Lu Xutao and Cui DongSen, Design of Transport Vehicles RemoteMonitoring System. 2nd International Conference on EducationTechnology and Computer, 2010.

Majid A. Al-Taee, SMIEEE, Omar B. Khader, Nabeel A. Al-Saber Remote Monitoring of Vehicle Diagnostics and Location Using a

Smart Box with Global Positioning System and General Packet RadioService. IEEE Transactions. July2007.

Tim Pieper, A Wireless Data Acquisition System (Project Report-Bradley University). May 2008.

Jean Paul Talledo Vilela, Student Member, IEEE, Jose CarlosMiranda Valenzuela, Member, IEEE. Design and Implementation ofa Wireless Remote Data Acquisition System for MobileApplications. Research Center for Automotive Mechatronics, Toluca

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