Contrast between RADAR and LIDAR
Nowadays, RADAR and LIDAR technologies have gained huge market demand in the field of autonomous vehicles. With the advancement of technology, the influence of the perimeter monitoring field is also very obvious. In this field, this is the two technologies have developed rapidly as a viable alternative or enhancement to perimeter detection.
RADAR means RADIO DETECTION AND RANGING, that is, using radio waves to detect targets. The core of the radar is the object detection sensor, which uses radio waves to determine the distance, height, direction and speed of the object. The ground-based radar solution provides a comprehensive, 360-degree coverage 24 hours a day, 7 days a week for any protected location, enabling cost-effective and large perimeter protection in all weather and lighting conditions. LIDAR use the pulsed laser measures the distance in a similar way to the radar. The laser radar emits a laser beam that calculates the distance from the lidar to the target point and forms a data point by measuring the time it takes for the light to hit the object or surface and then reflect it back. Millions of data points, called 'point clouds', can be processed to produce accurate 3D stereoscopic images in seconds, and these operations are completely devoid of video surveillance cameras. Unlike radar or sound waves, the laser emitted by the laser radar does not dissipate when it is transmitted back to its scanner. In general, the cost of the laser radar is higher than that of the ordinary ground radar system. Both technologies can be easily installed on existing structures without digging trenches. Or lay extra wiring. At the same time, the radar can also be low-power devices, and some can even be powered by solar energy.
An obvious feature of radar technology is its remote detection capability, which enables early detection and alarming. When the radar is deployed around the facility, nearby suspects can be automatically detected, and security personnel will receive an alert before they reach the warning line. Commercial radars have begun to penetrate the security market, providing powerful target detection capabilities of more than half a mile. Because radar radio waves absorb less light than Lidar when they touch objects, which means they can operate at greater distances, so they are often used in airplanes and warships to detect hidden fog, rain, snow and dust. Potential threats under weather conditions. In fact, the biggest difference between lidar and radar is the most obvious when deployed in the wild in inclement weather conditions. Lidars are susceptible to fog, rain, and even dust. The wavelengths of laser radar waves are very short. To be precise, less than a millionth of a meter, which means they are easily absorbed by water droplets in the air. On the other hand, radio waves have wavelengths of up to about 5 cm, which means they can easily pass through water droplets in fog, rain, snow, and even dust. In the case of possible water droplet problems, the lidar should be used with other auxiliary sensors, such as cameras and ultrasonic sensors.
Finally, since both radar and lidar can provide similar results, the target markets for these two technologies are almost identical. Potential monitoring scenarios include: • Airports • Bridges • Commercial facilities • Construction • Urban transport • Defensive anti-missile systems • Data centers • Government facilities • Logistics distribution centers • Nuclear power plants • Residential quarters • K-12 (pre-university basic education) and higher education peripherals • drone protection • public substation.
