Calibration of Speed Enforcement Down-The-Road Radars

Jendzurski, John R.; Paulter, Nicholas G.

doi:10.6028/jres.114.009

Cited by 22 publications

(17 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Another study examined the uncertainties of different methods in calibration of speed enforcement down to road radar. The proposed methods were tuning forks, a vehicle's speedometer, speed simulators, and a fifth wheel [3]. The most uncertain method regarding vehicle speed was a vehicle's speedometer and the least uncertain was the laboratory speed simulator.…”

Section: Related Workmentioning

confidence: 99%

“…In reality the problem is complex for several reasons. Firstly, since the velocities of the vehicles are acquired from a continuous wave Doppler radar, the vehicle is not travelling directly towards the radar but is slightly inclined at an angleα (see Figure 1) [3]. Therefore, the radar will not measure the actual velocity, but only the relative velocity in the direction of the beam.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Data Based Calibration System for Radar Used by Vehicle Activated Signs

Jomaa¹,

Yella²,

Dougherty³

et al. 2014

JDAIP

View full text Add to dashboard Cite

The accurate measurement of a vehicle's velocity is an essential feature in adaptive vehicle activated sign systems. Since the velocities of the vehicles are acquired from a continuous wave Doppler radar, the data collection becomes challenging. Data accuracy is sensitive to the calibration of the radar on the road. However, clear methodologies for in-field calibration have not been carefully established. The signs are often installed by subjective judgment which results in measurement errors. This paper develops a calibration method based on mining the data collected and matching individual vehicles travelling between two radars. The data was cleaned and prepared in two ways: cleaning and reconstructing. The results showed that the proposed correction factor derived from the cleaned data corresponded well with the experimental factor done on site. In addition, this proposed factor showed superior performance to the one derived from the reconstructed data.

show abstract

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Data Based Calibration System for Radar Used by Vehicle Activated Signs

Jomaa¹,

Yella²,

Dougherty³

et al. 2014

JDAIP

View full text Add to dashboard Cite

show abstract

“…These magnitudes are phase difference, speed estimation, x position, and central wavelength. Assuming the uncertainty sources are linearly independent, the total uncertainty is given by (14) (15) In addition to these uncertainties, there is another one related to the calibration technique used to periodically remove any constant errors [5].…”

Section: Uncertainty In Road Lane Measurement 1) Quantitative Analmentioning

confidence: 99%

“…Doppler radar in down-the-road (DTR) configuration has been widely used for speed enforcement on public roadways [5], [6]. In DTR configuration, the beam of the antenna is directed along the line of travel of the target vehicle.…”

mentioning

confidence: 99%

Vehicular Traffic Surveillance and Road Lane Detection Using Radar Interferometry

Felguera-Martin

Gonzalez-Partida

Almorox-González

et al. 2012

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

Abstract-Speed enforcement on public roadways is an important issue in order to guarantee road security and to reduce the number and seriousness of traffic accidents. Traditionally, this task has been partially solved using radar and/or laser technologies and, more recently, using video-camera based systems. All these systems have significant shortcomings that have yet to be overcome. The main drawback of classical Doppler radar technology is that the velocity measurement fails when several vehicles are in the radars beam. Modern radar systems are able to measure speed and range between vehicle and radar. However, this is not enough to discriminate the lane where the vehicle is driving on. The limitation of several vehicles in the beam is overcome using laser technology. However, laser systems have another important limitation: They cannot measure the speed of several vehicles simultaneously. Novel video-camera systems, based on license plate identification, solve the previous drawbacks, but they have the problem that they can only measure average speed but never top-speed. This paper studies the feasibility of using an interferometric linear frequency modulated continuous wave radar to improve top-speed enforcement on roadways. Two different systems based on down-the-road and across-the-road radar configurations are presented. The main advantage of the proposed solutions is they can simultaneously measure speed, range, and lane of several vehicles, allowing the univocal identification of the offenders. A detailed analysis about the operation and accuracy of these solutions is reported. In addition, the feasibility of the proposed techniques has been demonstrated with simulations and real experiments using a Ka-band interferometric radar developed by our research group.

show abstract

“…There are a number of accepted ways [1] of calibrating Doppler speed radars: Laboratory calibration -by using a Tuning Fork. The tuning fork is struck and then placed in front of the radar transceiver.…”

Section: Introductionmentioning

confidence: 99%

Moving target speed calibrator for Multanova 6F speed radar (34.3GHz)

Nissan

Yahalom

2013

2013 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2013)

View full text Add to dashboard Cite

We describe the design of a device intended to calibrate Multanova 6F Doppler speed radars. The Speed calibrator modulates the transmitted signal from the speed radar with the Doppler frequency, which is generated by a signal generator. This frequency corresponds to the speed of the target vehicle being measured by the speed radar. The range of "speeds" generated by the Speed calibrator is 25-250km/h and for both directions of movement (receding and approaching), which is identical to the range of speeds that can be measured by the speed radar. The modulated signal is transmitted back to the speed radar either as an Upper Side Band signal -for simulation of an approaching target vehicle, or as a Lower Side Band signal -for simulation of a receding target vehicle. The precision obtained by calibration of the speed radar using the Speed calibrator is ±1km/h within the range of speeds of 25-100km/h and ±1% within the range of 100-250km/h, for receding and approaching directions.

show abstract

Calibration of Speed Enforcement Down-The-Road Radars

Cited by 22 publications

References 0 publications

Data Based Calibration System for Radar Used by Vehicle Activated Signs

Data Based Calibration System for Radar Used by Vehicle Activated Signs

Vehicular Traffic Surveillance and Road Lane Detection Using Radar Interferometry

Moving target speed calibrator for Multanova 6F speed radar (34.3GHz)

Contact Info

Product

Resources

About