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TC7SC4 Meeting NIST 16 July 2013 Down-the-Road Traffic Radar John Broxon MPH Industries, Inc.

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Presentation on theme: "TC7SC4 Meeting NIST 16 July 2013 Down-the-Road Traffic Radar John Broxon MPH Industries, Inc."— Presentation transcript:

1 TC7SC4 Meeting NIST 16 July 2013 Down-the-Road Traffic Radar John Broxon MPH Industries, Inc.

2 TC7SC4 Meeting NIST 16 July 2013 Basic types of radar

3 TC7SC4 Meeting NIST 16 July 2013 Basic types of radar

4 TC7SC4 Meeting NIST 16 July 2013 Basic DTR Radar

5 TC7SC4 Meeting NIST 16 July 2013 Basic DTR Radar

6 TC7SC4 Meeting NIST 16 July 2013 Basic DTR Radar

7 TC7SC4 Meeting NIST 16 July 2013 Basic DTR Radar Separate antennasSingle antenna

8 TC7SC4 Meeting NIST 16 July 2013 Basic DTR Radar

9 TC7SC4 Meeting NIST 16 July 2013 Basic DTR Radar

10 TC7SC4 Meeting NIST 16 July 2013 Types of Operation

11 TC7SC4 Meeting NIST 16 July 2013 Types of Operation

12 TC7SC4 Meeting NIST 16 July 2013 Types of Operation

13 TC7SC4 Meeting NIST 16 July 2013 Cosine Effect

14 TC7SC4 Meeting NIST 16 July 2013 Cosine Effect

15 TC7SC4 Meeting NIST 16 July 2013 Cosine Effect

16 TC7SC4 Meeting NIST 16 July 2013 Testing DTR Radars

17 TC7SC4 Meeting NIST 16 July 2013 Calibration Traceability

18 TC7SC4 Meeting NIST 16 July 2013 Calibration Traceability Frequency Counter traceable to SI through national standards Uncertainty is ~10 -5 x measured frequency 1 1 Jendzurski and Paulter, Journal of Research of the National Institute of Standards and Technology, Vol 114, May 2009

19 TC7SC4 Meeting NIST 16 July 2013 Calibration Traceability Microwave Frequency Counter traceable to SI through national standards Uncertainty is ~10 -5 x measured frequency 1 1 Jendzurski and Paulter, Journal of Research of the National Institute of Standards and Technology, Vol 114, May 2009

20 TC7SC4 Meeting NIST 16 July 2013 Daily testing Internal circuit test Tests the internal crystal oscillators. Compares a 2 nd oscillator to the one that is used for speed measurement. Radar will indicate an error condition if an oscillator is off frequency. Tuning Fork Used 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 comparison Compares 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).

21 TC7SC4 Meeting NIST 16 July 2013 Across-the-Road (ATR) Radar

22 TC7SC4 Meeting NIST 16 July 2013 Across-the-Road (ATR) Radar

23 TC7SC4 Meeting NIST 16 July 2013 Questions?

24 TC7SC4 Meeting NIST 16 July 2013 Contact information: John Broxon Manager of Marketing and International Sales Radar and Laser Speed Measurement Systems MPH Industries, Inc. 316 East Ninth Street Owensboro, KY 42303 Office phone: 1-270-685-6223 E-mail: jhbroxon@mphindustries.com


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