We present a sensor network based indoor localization system that uses ultrasonic distance measurements for realtime localization of flying four-rotor robots. Such quadrocopters are on-board sensor controlled systems. They are very sensitive to lateral drifts, which cannot be compensated by mounted sensors. In our work, we provide a framework for time-of-flight based localization systems relyin...

Cruising for parking has negative impact from the economical and ecological points and view, and in overall traffic slowdown. Effective information about which and how many parking places are free could help to reduce these effects. This is possible only if a per parking place motorization is made, which will require the use of sensors to monitor every parking place. While the placement of sens...

ABSTRACT. A full scale wing panel fatigue test was undertaken in 2007 as a part of the DARPA Structural Integrity Prognosis System (SIPS) program. Both local and global ultrasonic sensors were installed on the wing panel and data were recorded periodically over a period of about seven weeks. The local ultrasonic sensors interrogated a small number of selected fastener holes, and the global ultr...

A thermally stable, piezoelectric and pyroelectric polymeric substrate was prepared. This thermally stable, piezoelectric and pyroelectric polymeric substrate may be used to prepare electromechanical transducers, thermomechanical transducers, accelerometers, acoustic sensors, infrared sensors, pressure sensors, vibration sensors, impact sensors, in-situ temperature sensors, in-situ stresshtrain...

In this paper, we propose an occupant sensing system using the sensor fusion composing of PIR (pyroelectric infrared) sensor, USD (ultrasonic distance) sensor and IRD (infrared distance) sensor for the smart airbag. These sensors are used to detect the position and body classification of occupants. By mounting these sensors within vehicles jig, the proposed system is experimentally evaluated in...

Unfortunately, the sensing devices which are available for mobile robots often fail in a variety of circumstances. This is especially true of the less expensive devices such as ultrasonic and infrared range sensors. Combining data from several sensors and from a pre-stored model of the domain provides a way to enhance the reliability of a perception system. Such combination may be accomplished ...

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 ...

The NavChair Assistive Wheelchair Navigation System [19] is being developed to reduce the cognitive and physical requirements of operating a power wheelchair for people with wide ranging impairments that limit their access to powered mobility. The NavChair is based on a commercial wheelchair system with the addition of a DOS-based computer system, ultrasonic sensors, and an interface module int...

Ultrasonic pulsed wave range Doppler sensors provide application in various fields, e.g. intruder alarm systems or autonomous vehicle steering, [1], [2], [3]. The timefrequency methods [4, 5] commonly used in these sensors, however, inhere the problem that, due to the transducer's non constant and direction-dependent transfer functions, the Doppler frequency cannot be determined with high accur...

In the last several years, mobile manipulators have been increasingly utilized and developed from a theoretical viewpoint as well as for practical applications in space, underwater, construction, and service environments. Our mobile manipulator RISCbot, is comprised of a manipulator arm mounted on a motorized mobile base wheelchair. The work presented in this chapter explores the use of multi-s...