![]() ![]() In this report, we characterize experimentally a scanning laser rangefinder that employs active sensing to acquire three-dimensional images. As expected, experimental results have shown that the sensor provides a trade-off between dynamic range and range accuracy.Įxperimental characterization of the perceptron laser rangefinder Tests are performed on the image sensor's innovative high dynamic range technology to determine its effects on range accuracy. The rangefinder makes use of the ICFYKWG1 linear image sensor, a custom CMOS sensor developed at the Vision Sensor Laboratory (York University). ![]() These advantages are made possible through spatial diversity and come at the cost of increased acquisition time. This technique has many advantages over past speckle-reduction technologies, such as a fixed system cost and form factor, and the ability to virtually eliminate laser speckle noise. For a given spatial location of the laser spot, capturing N spatially uncorrelated laser spot profiles is shown to improve range accuracy by a factor of N. The proposed rangefinder uses a precision linear translator to laterally reposition the imaging system (e.g., image sensor and imaging lens). ![]() These works propose a new triangulation laser rangefinder designed specifically to mitigate the effects of laser speckle noise. Although a wide variety of designs have been proposed, laser speckle noise still provides a fundamental limitation on range accuracy. [Albuquerque, NM Finley, Patrick [Albuquerque, NM Melton, Brad [Albuquerque, NMĪn apparatus, computer software, and a method of determining position inside a building comprising selecting on a PDA at least two walls of a room in a digitized map of a building or a portion of a building, pointing and firing a laser rangefinder at corresponding physical walls, transmitting collected range information to the PDA, and computing on the PDA a position of the laser rangefinder within the room.Īn improved triangulation laser rangefinder using a custom CMOS HDR linear image sensorģ-D triangulation laser rangefinders are used in many modern applications, from terrain mapping to biometric identification. Applications can have the following of white lines on the road, the target being easily cooperative, detection of vehicles in the vicinity, that means car convoy traffic control or parking assistance, the target surface being indifferent at short distances.ĭetermining position inside building via laser rangefinder and handheld computer But in case of short distances measurement, range around 10 meters, with a minimum distance around twenty centimeters, laser rangefinders are really useful with good resolution and rather low cost. Radars, like 77 GHz systems, are better adapted to such cases. We can infer that except for cooperative targets low power laser rangefinder are not powerful enough for long distance measurement. We have conducted measurements on laser rangefinder using different targets and at different distances. Moreover bad weather conditions, like rain or fog, ar disastrous. Obstacle detection or collision avoidance require a 200 meters range. As the system is used in the outside, the emitted average output power must respect the rather low level of 1A class. ![]() Even if laser systems present good performances the safety and technical considerations are very restrictive. THe purpose of this paper is to show to what kind of application laser range-finders can be used inside Autonomous Intelligent Cruise Control systems. Laser rangefinders for autonomous intelligent cruise control systems ![]()
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