Length and speed detection using microwave motion sensor

Abstract

This paper introduces a new approach to design a vehicle detection module using a microwave motion sensor in order to obtain vehicle length and vehicle speed. The design of this module aims to apply for Intelligent Transport System (ITS) in which it plays a role as a unit of Traffic Detectors with Inductive Loops, Video, Infrared Sensors, etc. The module has advantages of using low power, costing low price and especially providing reliable results for measuring vehicles. The output signal of the microwave motion sensor is a low-level voltage whose frequency (Doppler) represents the speed at which a vehicle is moving towards or away from the sensor. We process this signal to get information about length and speed of the vehicle. We implemented the method in a microwave motion sensor named HB100 to measure the movement in radius of 8[m] in line-of-sight, vehicle speed range from 5[km/h] to 40[km/h]. We achieved the accuracy of more than 80% in 100 times observing a specific vehicle in a specific speed range.

Blind Spot Detection for Autonomous Driving Using RADAR Technique

“…This output signal undergoes meticulous processing to extrapolate vital information regarding the dimensions and speed of the detected vehicle. [2]…”

“…The desire to incorporate technology into daily life, particularly in vehicles, underscores the importance of radar-based systems, enhancing accuracy, precision, and safety measures. [2] [11] Ultimately, the advent of cost-effective radar systems like the one detailed in this paper brings the promise of improved security measures, making them accessible and practical even in regions where financial constraints hinder the deployment of advanced security systems. This breakthrough innovation in radar technology serves as a testament to the continuous advancement and adaptability of modern technological solutions.…”

PDMS-FBG-Based Fiber Optic System for Traffic Monitoring in Urban Areas

“…Microwave motion sensors [9], [10] uses electro-magnetic radiation; the vehicle speed is determined using micro-waves reflected back to the receiver based on the Doppler effect. The disadvantage of these sensors is their susceptibility to electromagnetic interference, radio waves are reflected from metal parts of car body and other obstacles, such as barriers, street lighting poles, iron or concrete structures.…”

Portable Optical Fiber Bragg Grating Sensor for Monitoring Traffic Density

“…The voltage generated in the sensor is proportional to the force applied and therefore the respective vehicle weight. Microwave sensors [9,10] are used to measure vehicle speed based on the Doppler effect. However, these sensors are susceptible to electromagnetic interference caused by electromagnetic wave reflections from vehicle bodies, crash barriers, columns, etc.…”