Radar as speeding detector
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Speed detection and enforcement are designed to: (1) lower traffic accidents; (2) reduce incidence of traffic- related injuries; (3) eliminate possible deaths, road trauma & other damage to property; (4) remind drivers to comply with speed limits; (5) accomplish safe & effective regulation, as well as control of traffic; and (5) decrease by compulsion the number of road users who are over speed limits.

Motorists are also benefitted by new technology as an electronic device, known as the radar detector is able to detect if his/her speed is being monitored by police or law enforcement through radar gun. Radar detectors are used by driver so they can reduce the speed of their vehicles prior to being ticketed by police for speeding. In this case, only a radar-based Doppler device can be discovered since the other speed devices for measuring even those using automatic number plate recognition, piezo electric sensors, and technology of VASCAR cannot be detected. LIDAR as speeding device requires another sensor type, although LIDAR sensors are among several modern detectors. Most of the radar detectors today are able to detect signals over many kinds of wavelength bands; including: the X, K, and Ka.

Among the technologies used by law enforcement agencies to measure the speed of a moving vehicle is the Doppler radar that is able to transmit radio waves at the car. Then it infers the speed of the vehicle by counting the effect-moderated Doppler change in the frequency reflected by the wave. Radar guns are hand-held, mounted on vehicles or mounted on a fixed object, like a traffic signal.

The radar detectors used a superheterodyne receiver to detect electromagnetic emissions emanating from the radar gun. It is able to raise an alarm notifying the motorist that a transmission is detected. Due to a large of devices as automatic door openers used at supermarkets and adaptive automotive cruise control operating in the same part of the electromagnetic spectrum as radar guns, false alarms are likely to occur.

Radar detector works like a radio tuned to microwave frequencies. An extremely sensitive radio is Valentine One that is tuned exactly to the frequency bands used by all traffic radar in the U.S. They are in X band, K band, Ka Band, which includes photo. Valentine One uses two antennas; the first is aimed forward and one at the rear so it can locate the radar. Valentine One is extremely sensitive that it can easily identify the presence of radar from the scattering of the beam. It has the capability of finding these beams scattered a long time before the actual beam hits the car. However, the only exception is Instant-on radar.

Today, some radar detectors have become more sophisticated with added GPS technology. The users are able to manually store the locations police are frequently monitoring traffic as the detector sounds an alarm when the motorist is approaching a location of police patrol. Some GPS enabled detectors to download the GPS coordinates of speed monitoring cameras and red light cameras from the Internet. These are contained in the TRINITY database. It is so efficient that even interstate travelers are able to receive an alarm when approaching the location of a speed monitoring camera.

Source: En Wikipedia Org



Source: Valentine 1 Com



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