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Chiu Choi, Ph.D., P.E. Technical Consultant OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July.

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Presentation on theme: "Chiu Choi, Ph.D., P.E. Technical Consultant OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July."— Presentation transcript:

1 Chiu Choi, Ph.D., P.E. Technical Consultant OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18,

2 Background DTR radar testing program Lidar testing program ATR radar testing program New testing programs under development 2 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

3 IACP oversees and operates the Enforcement Technologies Testing Program Funded by the National Highway Traffic Safety Administration (NHTSA) 3 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

4 4 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 Manufacturers-- participation in the testing program on a voluntary basis All participants are subjected to the same standards Their Devices– to be tested to the appropriate published performance specifications

5 5 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 NHTSA funded the development of the performance specifications. NIST was involved. Currently published performance specifications: DTR Radar, Lidar, and ATR Radar

6 6 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 Conforming Products List (CPL)- a list of devices that passed all the tests specified in their corresponding performance specifications CPL is maintained by the IACP CPL is published. Law enforcement agencies are encourage to purchase devices on the list.

7 7 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 Two laboratories have contracts with IACP to conduct the testing Laboratories are evaluated biannually by IACP with observers from external agencies attending lab visits Instruments are kept calibrated Test results properly recorded and reported

8 8 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 Speed-measuring Device Performance Specifications: Down-the-road Radar Module, DOT HS , NHTSA, June Limited to unmodulated CW radars Operate while moving down the road Handhelds

9 9 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 What are the requirements? §2.1 Manufacturer Provided Equipment §2.2 Manufacturer Provided Information §2.3 Manufacturer Labeling §2.4 Tuning Fork Calibration §2.5 Radar Device Tuning Fork

10 10 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 §2.6 Microwave Transmission §2.7 Environmental Extremes §2.8 Low Supply Voltage Indicator §2.9 Doppler Audio §2.10 Speed Monitor Alert

11 11 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 §2.11 Power Surge §2.12 Speed Display §2.13 Conducted Electromagnetic Interference §2.14 Radiated Electromagnetic Interference §2.15 Speed Accuracy: Field Operation

12 12 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 What are the tests? §5.1 (Reserved) §5.2 (Reserved) §5.3 Labeling and Operation Tests §5.4 Tuning Fork Calibration Test §5.5 Radar Device Tuning Fork Test

13 13 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 §5.6 Microwave Transmission Test §5.7 Environmental Tests §5.8 Low Supply Voltage Indicator Test §5.9 Doppler Audio Tests §5.10 Speed Monitor Alert Test

14 14 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 §5.11 Power Surge Test §5.12 Speed Display Test §5.13 Conducted Electromagnetic Interference Tests §5.14 Radiated Electromagnetic Interference Tests §5.15 Speed Accuracy: Field Operation Tests

15 15 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 To get on the CPL – one unit of the model must pass all the tests. To stay on the CPL– CPL Stage II testing on the first 200 units ( at least 90% must pass) Subsequently 6 units per year subjected to Critical Performance Testing (all units must pass)

16 Test Components for CPL Stage II and CPT: Tuning Fork Calibration Tuning Fork Transmission Frequency Stability Power Density Low Voltage 16 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

17 Test Components for CPL Stage II and CPT: Doppler Audio Internal Circuit Directional (if applicable) Low and High Speed Display Radio Frequency Interference 17 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

18 On-going efforts of improvements on the performance specfications: Common output protocol Common control protocol 18 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

19 19 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 Speed-measuring Device Performance Specifications: Lidar Module, DOT HS , NHTSA, June Applicable to laser speed-measuring devices transmitting infrared pulses FDA CDRH Class I eye safety handhelds

20 20 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 What are the requirements? § 2.1 Manufacturer Provided Equipment § 2.2 Manufacturer Provided Information § 2.3 Manufacturer Labeling § 2.4 Range Accuracy § 2.5 Long Range

21 21 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 § 2.6 Beam Characteristics § 2.7 Environmental Extremes § 2.8 Low Supply Voltage Indicator § 2.9 Supply Voltage Tolerance § 2.10 Speed Display § 2.11 Speed Accuracy: Laboratory Simulation

22 22 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 § 2.12 Auxiliary-Equipment Interface § 2.13 Conducted Electromagnetic Interference § 2.14 Radiated Electromagnetic Interference § 2.15 Speed Accuracy: Field Operation § 2.16 Vehicle Determination (Lidar Systems Only): Field Operation

23 23 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 What are the tests? § 5.1 (Reserved) § 5.2 (Reserved) § 5.3 Labeling and Operation Tests § 5.4 Range Accuracy Test § 5.5 Long-Range Test

24 24 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 § 5.6 Beam Characteristics Test § 5.7 Environmental Tests § 5.8 Low Supply Voltage Indicator Test § 5.9 Supply Voltage Tolerance Tests § 5.10 Speed Display Tests § 5.11 Speed Accuracy: Laboratory Simulation Tests

25 25 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 § 5.12 Auxiliary-Equipment Interface Tests § 5.13 Conducted Electromagnetic Interference Tests § 5.14 Radiated Electromagnetic Interference Tests § 5.15 Speed Accuracy: Field Operation Tests § 5.16 Vehicle Determination (Lidar Systems Only): Field Operation

26 26 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 To get on the CPL- one unit of the model must pass all the tests. To stay on the CPL– CPL Stage II testing on the first 100 units ( at least 95% must pass) Subsequently, 6 units per year subjected to Critical Performance Testing (all units must pass)

27 Test Components for CPL Stage II and CPT: Beam Alignment (Horizontal and Vertical) Target Discrimination Range Accuracy Low Supply Voltage Indicator 27 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

28 Test Components for CPL Stage II and CPT: Supply Voltage Tolerance Low-Speed and High-Speed Display Limits (Approaching and Receding) Speed Accuracy (With and Without Perturbation) Pulse Repetition Rate 28 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

29 29 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 Speed-measuring Device Performance Specifications: Across-the-road Radar Module, DOT HS , NHTSA, Oct Limited to automated, unmodulated CW radars that transmit a microwave beam at a specified angle to the roadway and make allowance for cosine angle effect

30 30 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 What are the requirements? §2.1 Manufacturer Provided Equipment §2.2 Manufacturer Provided Information §2.3 Manufacturer Labeling §2.4 Tuning Fork Calibration §2.5 Tuning Fork

31 31 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 §2.6 Microwave Transmission §2.7 Environmental Extremes §2.8 Low Supply Voltage Indicator §2.9 Doppler Audio §2.10 (Reserved) §2.11 Power Surge §2.12 Speed Display

32 32 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 §2.13 Signal Processing §2.14 (Reserved) §2.15 Conducted Electromagnetic Interference §2.16 Radiated Electromagnetic Interference §2.17 Speed Accuracy: Field Operation §2.18 Vehicle Determination: Field Operation Speed Measurement

33 33 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 What are the tests? §5.1 (Reserved) §5.2 (Reserved) §5.3 Manufacturer Labeling tests §5.4 Tuning Fork Calibration tests §5.5 Tuning Fork tests

34 34 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 §5.6 Microwave Transmission tests §5.7 Environmental Extremes tests §5.8 Low Supply Voltage tests §5.9 Doppler Audio tests §5.10 (Reserved) §5.11 Power Surge tests §5.12 Speed Display tests

35 35 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 §5.13 Signal Processing tests §5.14 Reserved §5.15 Conducted Electromagnetic Interference tests §5.16 Radiated Electromagnetic Interference tests §5.17 Speed Accuracy: Field Operation tests §5.18 Vehicle Determination: Field Operation

36 36 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013 To get on the CPL – one unit of the model must pass all the tests. To stay on the CPL– CPL Stage II testing on the first 100 units, at least 95% must pass (under review) Subsequently 6 units per year subjected to Critical Performance Testing, all units must pass (under review)

37 Test Components for CPL Stage II and CPT: Tuning Fork Calibration Tuning Fork Transmission Frequency Stability Power Density Low Voltage 37 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

38 Test Components for CPL Stage II and CPT: Doppler Audio Internal Circuit Directional (if applicable) Low and High Speed Display Radio Frequency Interference 38 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

39 Few ATR radar systems have been tested recently Growing interest in developing performance specifications for and testing of automated, modulated radars 39 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

40 Development underway Red light camera systems performance specifications approved RLCS simulator verified Working on getting the testing to start as soon as possible 40 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

41 Working on the scanning lidar performance specifications Interest in distance over time Interest in improving electromagnetic interference testing 41 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013

42 QUESTIONS? 42 OIML workshop on the metrology of vehicle speed measurement devices NIST Headquarters, Gaithersburg, MD July 16-18, 2013


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