Outdoor and industrial applications and other rugged environments present conditions that can interfere with remote sensing technologies such as ultrasonic sensors. Inclement weather, dust and debris, and complex sensing environments are some issues that can impact standard sensors. Radar sensors can address these challenges, detecting moving and stationary targets in various ambient conditions. This article reviews the scenarios where radar can outperform alternative options. It examines several types of radar sensors from Banner Engineering, their applications, and design considerations to remember when selecting a sensor.
Why use radar sensors? Radar is robust in the face of rain, dust, and other common airborne substances, works equally well in bright and unlit spaces, and is unaffected by temperature variations and wind. It can detect surfaces with a wide range of finishes, geometries, and colors, and also penetrate non-conductive materials, allowing radar sensors to peer inside containers. In addition, radar can be used over relatively long distances while also being resistant to crosstalk, giving it advantages for short-range applications where sensors are in close proximity.
How radar works
Radar works by bouncing electromagnetic waves off target objects, determining distance based on the time it takes for a signal to return. Radar sensors use two main technologies: frequency-modulated continuous wave (FMCW) and pulsed coherent radar (PCR). FMCW radar emits a constant stream of radio waves, allowing for uninterrupted monitoring of moving and stationary objects. PCR sensors send radio waves in pulses, typically using low-power transmitters. This makes PCR sensors better suited to short- range applications.
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