TC7SC4 Meeting NIST 16 July 2013 Down-the-Road Traffic Radar John Broxon MPH Industries, Inc.
TC7SC4 Meeting NIST 16 July 2013 Down-the-Road Traffic Radar John Broxon MPH Industries, Inc.
Apr 02, 2015
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TC7SC4 MeetingNIST 16 July 2013
Down-the-Road Traffic Radar
John BroxonMPH Industries, Inc.
TC7SC4 MeetingNIST 16 July 2013
Basic types of radar
TC7SC4 MeetingNIST 16 July 2013
Basic types of radar
TC7SC4 MeetingNIST 16 July 2013
Basic DTR Radar
TC7SC4 MeetingNIST 16 July 2013
Basic DTR Radar
TC7SC4 MeetingNIST 16 July 2013
Basic DTR Radar
TC7SC4 MeetingNIST 16 July 2013
Basic DTR Radar
Separate antennas Single antenna
TC7SC4 MeetingNIST 16 July 2013
Basic DTR Radar
TC7SC4 MeetingNIST 16 July 2013
Basic DTR Radar
TC7SC4 MeetingNIST 16 July 2013
Types of Operation
TC7SC4 MeetingNIST 16 July 2013
Types of Operation
TC7SC4 MeetingNIST 16 July 2013
Types of Operation
TC7SC4 MeetingNIST 16 July 2013
Cosine Effect
TC7SC4 MeetingNIST 16 July 2013
Cosine Effect
TC7SC4 MeetingNIST 16 July 2013
Cosine Effect
TC7SC4 MeetingNIST 16 July 2013
Testing DTR Radars
TC7SC4 MeetingNIST 16 July 2013
Calibration Traceability
TC7SC4 MeetingNIST 16 July 2013
Calibration Traceability
Frequency Counter traceable to SI through national standards
Uncertainty is ~10-5 x measured frequency11 Jendzurski and Paulter, Journal of Research of the National Institute of Standards and Technology, Vol 114, May 2009
TC7SC4 MeetingNIST 16 July 2013
Calibration Traceability
Microwave Frequency Counter traceable to SI through national standards
Uncertainty is ~10-5 x measured frequency1
1 Jendzurski and Paulter, Journal of Research of the National Institute of Standards and Technology, Vol 114, May 2009
TC7SC4 MeetingNIST 16 July 2013
Daily testing
Internal circuit testTests the internal crystal oscillators. Compares a 2nd oscillator to the one that is used for speed measurement. Radar will indicate an error condition if an oscillator is off frequency.
Tuning ForkUsed as an external frequency generator. Accuracy is typically +/-0.5%. Tuning fork is rung and placed in radar beam. Multiple tuning forks can be used at the same time to create multiple simulated speeds (moving mode or faster vehicle simulation). Tuning forks have limitations, but they are court accepted in the US and parts of Canada.
Speedometer comparisonCompares the speed indicated by the radar to a calibrated speedometer. This is a qualitative comparison, due to potential variations in the speedometer (due to tire inflation and other factors).
TC7SC4 MeetingNIST 16 July 2013
Across-the-Road (ATR) Radar
TC7SC4 MeetingNIST 16 July 2013
Across-the-Road (ATR) Radar
TC7SC4 MeetingNIST 16 July 2013
Questions?
TC7SC4 MeetingNIST 16 July 2013
Contact information:John BroxonManager of Marketing and International SalesRadar and Laser Speed Measurement SystemsMPH Industries, Inc. 316 East Ninth StreetOwensboro, KY 42303Office phone: 1-270-685-6223E-mail: [email protected]
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