Acquiring and Analyzing Data from Sensors and In-Vehicle Networks
Duration: 2 Days
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November 1-2, 2012 (8:30 a.m. - 4:30 p.m.
) - Troy, Michigan
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Hotel & Travel Information
The acquisition of test data is required throughout the product's life cycle - in prototype performance evaluation, reliability/durability testing, duty-cycle analysis, end of line testing, and service and aftermarket product areas. Both lab and on-road testing is needed for components, sub-systems and entire vehicles.
As in-vehicle networks become increasingly more sophisticated in terms of the number of controllers, the speed at which they communicate, and the number of parameters available, they are a virtual goldmine for the test engineer. If the data is already available on the vehicle network, the engineer may only need to add any missing sensors (or possibly none at all).
After reviewing the traditional approach of acquiring data directly from sensors, the course will focus on the newer approach of obtaining data from the in-vehicle network. Attention is given to the complications of taking data from the in-vehicle network and how to overcome them, current trends and applications, wireless data acquisition (Wi-Fi and cellular), GPS, relevant technical standards, and how to simultaneously acquire network data with direct sensor measurements. Both PC-based and logger (flight recorder) data acquisition will also be covered. In addition, a practical guide for analysis and presentation techniques will be covered along with examples.
Learning Objectives
By attending this seminar, you will be able to:
- Acquire data from both in-vehicle networks and sensors
- Avoid common pitfalls of acquiring and analyzing good data
- Request messages and decode them to acquire engineering parameters using various network protocols such as: CAN (controller area network), J1939, ISO15765, J1708, SAE J1850, KWP2000 and ISO9141
- Choose the best analysis techniques to better understand and present test data
- Compare benefits of acquiring data with a PC vs. a stand-alone data logger (without a PC in the vehicle)
- Discover what a PC or stand-alone logger is capable of doing for real-time data acquisition, analysis, display and storage of data
- Identify an unknown network protocol
- Reverse engineer data on the network
Who Should Attend
Any engineer, scientist or technician who needs to acquire test data will benefit from this course. Testing is required throughout the product's life cycle from prototype performance evaluation, to reliability/durability testing, end of line testing and service. This includes testing of components, sub-systems and entire vehicles done in both the lab and in-vehicle road testing.
Prerequisites
Some test experience is preferred and knowledge of college algebra is recommended.
Topical Outline
DAY ONE:
- Acquiring Data Directly from Sensors
- Sensor Inputs: Sensor overview, single-ended vs. differential inputs, proper ranging of the channels, zeroing offsets and signal conditioning.
- Data Acquisition: Analog-to-digital converters (A/D), time and amplitude resolution, pre- and post-triggering, time synchronous averaging, sample rate, aliasing, frame length and number of frames in a data file.
- Frequency Domain
- Analyzing data in the frequency domain with the Fast Fourier Transform (FFT) is a valuable tool to optimize sample rate, which affects many factors such as data quality (aliasing), time and frequency resolution, digital filtering, integration and differentiation. Analyzing and displaying the data in the revolution (angular) domain and order domain offer valuable insights into the data.
- In-Vehicle Data Acquisition
- Comparison of in-vehicle data acquisition with sensor data acquisition.
- Explanation of OBD-II and what it can and cannot do for you
- Examination of files containing hex messages. Learn the steps required to convert to useful engineering parameters (e.g. engine RPM, wheel speed, ambient temperature). Message files will be shown from both heavy duty and automotive vehicles
DAY TWO:
- In-Vehicle Data Acquisition - continued
- Step-by-step procedure to acquire parametric data for both a PC and stand-alone loggers.
- Explanation of why the database relating parameters and messages is the key and how to get this database information.
- Demonstration of acquiring data from both an in-vehicle network and sensors
- Review of applicable standards and references.
- Identify unknown automotive protocols and learn about the various network protocols
- Define wireless data acquisition options, the advantages and disadvantages of them and the practical throughput rate for real-time data acquisition.
- Data Analysis Techniques
- How to select the best numerical techniques and how to optimize their performance for digital filtering (including IIR and FIR filters), integration, differentiation, and correlation.
- How combining logic, statistics and Z transform provides a powerful technique to find key points along a waveform to make decisions such as pass/fail or perform intelligent monitoring that only stores the data of interest to optimize data storage and minimize your time required to review the data.
Instructor(s): Richard Walter
Richard Walter is the President and Founder of HEM Data Corporation. A pioneer in PC-based data acquisition and analysis, he has acquired data from in-vehicle networks since they were mandated in 1995. Mr. Walter previously worked at the Bendix Research Laboratories where he was awarded five patents for automotive inventions and gained valuable testing experience. He taught at Lawrence Technological University and has conducted numerous seminars and training sessions. He has had several articles and papers published in engineering journals including SAE and Sensors Magazine. Mr. Walter is a member of SAE, ASME and The Vibration Institute and is a registered professional engineer in Michigan. Mr. Walter has a B.S. in mechanical engineering from the University of Detroit, an M.S. in mechanical engineering from Wayne State University and an M.E.M. in engineering management from the University of Detroit.
Fees: $1315.00
; SAE Members: $1052.00 - $1184.00
1.3 CEUs
You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.
Testimonial
”Pierces the cloud of confusion regarding competing automotive networking standards.”
Sherman Couch
Director of Engineering
Constellation Data Systems, Inc.
To register, click Register button at the top of this page and submit the online form, or contact SAE Customer Service at 1-877-606-7323 (724/776-4970 outside the U.S. and Canada) or at CustomerService@sae.org
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