The combination of ultrasonic and microwave sensors offers versatile sensor applications and new solutions in terms of reliability of decision and robustness against distortions. For motion detection in an intruder alarm system, the redundant sensor information from the Doppler multisensor is used to distinguish a moving person from distortions. The superior performance is based on the fact tha...

Blinds people need some aid to interact with their environment with more security. A new device is then proposed to enable them to see the world with their ears. Considering not only system requirements but also technology cost, we used, for the conception of our tool, ultrasonic sensors and one monocular camera to enable user being aware of the presence and nature of potential encountered obst...

For mobile robots equipped with incremental encoders and one sonar sensor this paper presents wall-following controllers that achieve global convergence, as well as the fulll-ment of constraints on the orientation of the sonar and the velocities of the wheels. A sensor-fusion approach for the estimation of the robot's coordinates is adopted by designing an Extended Kalman Filter that combines u...

The simultaneous localization and mapping problem is approached by using an ultrasound sensor and wheel encoders. To account for the low precision inherent in ultrasound sensors, the occupancy grid notion is extended. The extension takes into consideration with which angle the sensor is pointing, to compensate for the issue that an object is not necessarily detectable from all positions due to ...

This paper reports a sensor system which it has been designed and constructed to acquire the profile of surfaces. This system is based in a CCD camera for object boundary-determination mounted over a robot manipulator shoulder and ultrasonic sensors for depth measurement mounted on a fixture at the wrist of the manipulator. It has been used an average weighted by degrees of confidence for raw s...

Map building is one of the most popular classical problems in mobile robotics field and sensor model is the way to interpret raw sensory information in spatial world especially for building map. For mobile robots, working in indoor environment, Ultrasonic Sonar(US) is famous because of its availability, wide angle and long range sensing ability etc, in spite of some problems. Among them, Specul...