sensor lab using matlab - mathworks · confidential | rbei | 3/26/2014 | © robert bosch...

Confidential | RBEI | 3/26/2014 | © Robert Bosch Engineering and Business Solutions Limited 2014. All rights reserved, also regarding any

disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.

Sensor LAB

Sensor LAB using MATLAB

Submitted by

Robert Bosch Engineering and Business Solutions Limited

1



Sensor LAB

Agenda

1 • Introduction

2 • Problem Statement

3 • Sensor Lab Overview

4 • Sensor Lab Architecture

5 • Work Flow

6 • Sensor Lab Case Study

7 • Sensor Lab Infrastructure

8 • Benefits

9 • Future Scope of Work

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Sensor LAB

Introduction

Sensors play a Vital Role in

Automotive World

Validation of Various Automotive

sensors is essential during the

Product life cycle

Each sensors undergo different

kinds of validation like Performance

& Endurance testing

Software Tools are required to

Acquire, Analyze & Present(AAP)

Sensor Data

Sensors are devices that transform physical quantities such as pressure or

acceleration into output signals that serve as inputs for control systems.

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Sensor LAB

Problem Statement

Pain Areas

Search for Engineering Solutions

Low Productivity

Time to Market & Cost

Why Sensor

Lab

No predefined benchmark

available hence variety of tools to perform similar AAP activities across units

Sensor Data Mining & Data

Warehouse strategies

unavailable

No Standard Data Storage

Format Available

Distributed activities during

Sensor development

lifecycle across geographical

location

Huge effort & time involved during sensor validation life

cycle

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Confidential | RBEI/ETT3 | 3/26/2014 | © Robert Bosch Engineering and Business Solutions Limited 2014. All rights reserved, also regarding

any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.

Sensor LAB

Sensor LAB Overview

Sensor NI Hardware Sensor LAB

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Sensor LAB

Sensor LAB Overview

• Sends trigger via DAQ Channels to

initialize start of Data Acquisition Sensor LAB

• Trigger will activate sensors

• DAQ channels are interfaced with sensors

NI-Hardware

• Sensors when activated sends the data to Sensor LAB tool through NI Hardware

• Data Collected is analyzed & Visualized using Sensor LAB tool Sensors

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Sensor LAB

Sensor Lab Architecture

7



Sensor LAB

Work flow

Sensors •Lambda Sensors

•Pressure Sensors

•NVH Data

NI-Based

Hardware

Select Sensors

Required for

Validation

Configuration Setup •No. of Samples Required

•Channels for DAQ

•Sampling Rate

•Calibration Constants

•Other Parameters

AAP

Noise

Oxygen Content

Other Parameters

Offset

8



Sensor LAB

Lambda-Sensors

Lambda Sensors or Oxygen sensors measures the

content of oxygen present in the exhaust gas

Lambda Sensors measures difference between the

amount of oxygen in the exhaust gas and the amount of

oxygen in air

Different types of Lambda Sensors are LSU4.9 &

LSU ADV

Calibration factors differs for each kind of sensors

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Sensor LAB

Lambda-Sensors Case Study

Sensor Lab tool to detect the list of all available DAQ

Channels during setup

Multiple Sensors can be configured & Validation can

be performed

Acquired Data is stored in required file formats for

post processing purposes

Data acquisition toolbox from MathWorks is used to

interface the NI based hardware

Supports for switching between sensors during

measurement

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Sensor LAB

Lambda-Sensors Measured Parameters

Pumping Current which is directly linked to the oxygen

content of the exhaust gas

Sensing element temperature

Pumping voltage

Engine speed

Load

Post processing of Acquired Data is performed using

AVID(Analysis & Visualization of Data) tool

Processed data is stored in .mat form

Sample Data

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Sensor LAB

Visualize all samples against selected one parameter

Visualize selected samples against selected one

parameter

Visualize one sample against selected parameters

Calculation of sensing element temperature from signal

UR

Calculation of O2-content from signal Ua

Save the visualized plot generated in .png format

Supports data loading and saving of lambda sensor data

in different file formats (.TXT,MAT,.XLS, .CSV)

Salient Features

Accurate analysis, easy and quick visualization

Performance improvement in the validation of the components

Client Benefits

Analysis & Visualization of Lambda Sensor data

Preprocessing of Lambda Sensor data

Visualization & Analysis of parameters & samples of

Lambda sensor data

Filtering of Lambda sensor data over defined time

interval

Load & Analyze data from multiple files & different formats

Need

Analysis and Visualization of Data for Lambda/Oxygen Sensors

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Sensor LAB

Lambda-Sensors Result Analysis Ip Vs Time Rie Vs Time

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Sensor LAB

Sensor LAB - Infrastructure

Matlab R2012b 1

Data Acquisition Toolbox 2

Signal Processing Toolbox 3

Matlab Compiler 4

Database Toolbox 5

Parallel Computing Toolbox 6

Automotive Sensors 7

NI Based Hardware 8

14

Parameters With PCT Without

PCT

Computation

Time

(30-35%)

Accuracy

Handling

Large data

PCT refers to Parallel Computing Toolbox



Sensor LAB

Benefits

One platform to perform Data Preprocessing & post processing

Sensor Lab tool can be configured for multiple sensors during test measurement

One layer to access all the generic base parameters of the sensors

Supports quick computation with the help of parallel computing toolbox

Performance improvement in the validation of the components

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Sensor LAB

Future Scope of Work

Sensor LAB to interface with few more Automotive Sensors

Sensor LAB to address more specific Analysis needs for individual Sensors

Interfacing with database & managing data

One Common layer for Visualization & Analysis Data

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Sensor LAB

Thank You for your Attention!

Any Questions?

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sensor lab using matlab - mathworks · confidential | rbei | 3/26/2014 | © robert bosch...

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