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Radar technology emits electromagnetic waves from a transmitter, which bounce off an object and return to a receiver. By measuring the time it takes for the signal to bounce, the distance, position, and presence of the object can be determined. Because radar sensors use electromagnetic waves in the microwave frequency range, they possess functions not found in other sensor technologies, including:
l Ignoring many environmental conditions
l Testing plastics and glass, including the casing.
l Unaffected by the object's color or surface treatment
l Long-distance sensing
l Focusing on certain objects while ignoring others
Different radar sensors operate at different frequencies. Low-frequency radar is excellent at detecting cars, trains, trucks, and other metallic objects. Higher-frequency radar can detect a wider range of objects, including those made of glass, plastic, or organic materials. Radar is also more robust and durable than ultrasound and other sensors, especially outdoors, because it can ignore surrounding weather conditions.
Radar sensors are unaffected by most environmental conditions; their signals can penetrate precipitation such as snow, sleet, fog, haze, and dust. Radar is unaffected by wind and can operate over a wide temperature range, making it suitable for use in extreme environments. It is ideally suited for conditions where other sensor technologies may struggle, such as signal loss or erroneous readings.
Radar can penetrate not only the surrounding weather, but also plastic and glass, making it ideal for use in server racks. Even if the glass or plastic is opaque or dirty, radar can still detect objects on the other side.
Many common applications utilize radar's penetrating power, for example:
l Vehicle positioning is performed inside an automatic car wash machine with drastic temperature fluctuations and mist, steam, and water spray.
l Check for vehicles at the drive-thru window in constantly changing weather.
l Vehicle inspection at outdoor electric vehicle charging stations
l External monitoring of corrosive liquids in storage tanks
Radar sensors are another excellent detection solution, easily identifying objects regardless of their color, surface finish, or surface uniformity. Multiple objects of different colors can be easily detected by radar. Whether the surface is glossy, matte, reflective, or metallic, radar sensors can pinpoint the precise location of objects. Using wide-beam-angle radar sensors, objects with curved surfaces, mirrors, or windows can also be reliably identified—a unique advantage of radar. Wider beam patterns increase the likelihood of some of the transmitted beam being reflected back to the receiver.
Radar can be used to process various surfaces, including:
l Identifying curved metal wheels in car assembly plants
l Detect the presence of passenger vehicles to display available parking spaces.
l Monitor the entry and exit of trucks of different shapes and colors at the loading and unloading dock.
l To avoid collisions between airport ground support vehicles and aircraft curved surfaces
Many sensors have relatively short ranges, which is suitable for many applications. However, in some cases, long-range radar sensors are preferable. For long-range detection, radar can accurately sense objects at distances of several meters, continuously detecting objects within a specific area using a constant wave current. Long-range radar sensors are ideal for applications involving large moving objects, including:
l Tracking multiple train locations in a dirty railway freight yard
l Monitoring wind and waves to detect the different sizes and shapes of ships entering and leaving the port.
l To prevent collisions between large gantry cranes or bridge cranes in warehouses or docks.
l Provide guidance and blind spot detection for operators of large mining machinery to ensure their safe operation of the equipment.
KKIT radar sensors can handle many different types of applications, especially in areas where other types of sensors may struggle. Whether indoors or outdoors, at short or long distances, and in harsh environments, they perform admirably. Durable and reliable, Banner radar sensors are the best choice for object and vehicle detection, collision avoidance, position feedback, and more.
