In this work pits, obstacles and navigation of the module is developed for the effective driver control and safety navigation scheme is approached. The system consists of Bluetooth module, IR sensor, Ultrasonic sensor and microcontroller unit. Ultrasonic sensor is used to detect pits and uneven surfaces, IR sensors is used to detect obstacles on left and right sides of the system and using Blue...

One aspect of the recent paradigm shift in geospatial information sciences is that data acquisition and processing systems have moved away from the single sensor-based model to advanced integrated multisensory systems, which typically include imaging and navigation sensors. Active sensors, such as Light Detection and Ranging (LiDAR) and Interferometric Synthetic Aperture Radar (IFSAR), are rout...

Flight test results and lessons learned are presented for a helicopter UAV low-altitude navigation and landing system. Results are given for both urban and natural settings. The navigation component uses a quasi-3D A* approach to route planning that enables maneuver through complex terrain using real-time sensor data. The landing component performs landings to sites that it determines to be saf...

This paper presents a new globally convergent rangesensor based navigation algorithm in three-dimensions, called 3DBug. The 3DBug algorithm navigates a point robot in a three-dimensional unknown environment using position and range sensors. The algorithm strives to process the sensory data in the most reactive way possible, without sacrificing the global convergence guarantee. Moreover, unlike ...

AbstmctIn this paper, we present a new approach to sensor-based navigation in cluttered environments. In our system, tasks are specified in terms of visual goals, and obstacles are detected by a laser range finder. To effect task performance, we introduce a new gain scheduling visual servo controller. Our approach uses a diagonal gain matrix whose entries are adjusted during execution according...

Navigation and positioning technology is closely related to our routine life activities, from travel to aerospace. Recently it has been found that Cataglyphis (a kind of desert ant) is able to detect the polarization direction of skylight and navigate according to this information. This paper presents a real-time bionic camera-based polarization navigation sensor. This sensor has two work modes...

A new method for dynamic measurement of deflections of the vertical (DOV) is proposed in this paper. The integration of an inertial navigation system (INS) and global navigation satellite system (GNSS) is constructed to measure the body's attitude with respect to the astronomical coordinates. Simultaneously, the attitude with respect to the geodetic coordinates is initially measured by a star s...

We propose an Euclidean medial axis filtering method which generates subsets of Euclidean medial axis were filtering rate is controlled by one parameter. The method is inspired by Miklos’, Giesen’s and Pauly’s scale axis method which preserves important features of an input object from shape understanding point of view even if they are at different scales. Our method overcomes the most importan...

It is shown that a convex medial axis polyhedron has two distinct edge unfoldings: cuttings along edges that unfold the surface to a simple planar polygon. One of these unfoldings is a generalization of the point source unfolding, and is easily established to avoid overlap. The other is a novel unfolding that requires a more complex argument to establish nonoverlap, and might generalize.