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Speed Measurement
Product Summary
Traditional techniques for speed monitoring devices, such as measuring the spinning of wheels, often lead to inaccurate vehicle speed measurement. The “AT-SOG75-1111-P” radar speed sensing device is specifically designed to be mounted directly on the vehicle.
General Description
This Attingimus radar speed sensing unit, mounted on a vehicle, will provide accurate vehicle speed measurement. Every 10 metres, the radar can issue data on speed and direction. The speed overground corresponds to a pulse frequency rate, making it one of the most efficient speed monitoring devices available. Filtering based on signal strength and distance to the radar ensures robust speed measurements.
Every metre of travel distance corresponds to 16 pulses, a default value that can be configured by Attingimus or the customer. The pulses operate with a 50% duty cycle, and the height of the pulses in voltage equals the supply voltage. By measuring only the Doppler effect and thus speeds at a specific range, reliable vehicle speed measurements are assured. Even a relatively small speed can be measured, with a minimum detectable speed of just 10 cm per second.
Specifications
General technical data for radar speed sensing applications includes the following specifications: Supply voltage ranges from +10 to 30V, with a typical value of 12V. The supply current is typically 140mA. This device provides a maximum transmit power of 20dBm (EIRP) and is compliant with ETSI 300 / 440 standards, featuring a bandwidth of 250MHz. The antenna beam pattern is 11º x 11º, with a tolerance of +/-5.5º. For vehicle speed measurement, the pulse output is configured to produce 16 pulses per traveled meter. The sensitive distance for effective speed monitoring devices ranges from 1.5m to 3.5m, while the speed area operates between -80m/s to +80m/s (approximately +/- 178mph/288kph). The minimum speed that can be detected is 0.10m/s, and the overall accuracy is maintained at 0.5%.