This paper describes a new approach for mobile robot navigation using an interval analysis based adaptive mechanism for an Unscented Kalman filter. The robot is equipped with inertial sensors, encoders and ultrasonic sensors. The map used for this study is two-dimensional and it is assumed to be known a-priori. Multiple sensor fusion for robot localisation and navigation has attracted a lot of ...

Slow ground motion study for future accelerator projects and alignment of large accelerator machine components with high accuracy are important tasks now. One of the prevalent tool for solution of these tasks are Hydrostatic Level Sensors designed to work into the Hydrostatic Levelling System, which is based on principle of communicating vessels. All water level measuring sensors are linked to ...

We report a characterization of the acoustic sensitivity of microstructured polymer optical fiber interferometric sensors at ultrasonic frequencies from 100kHz to 10MHz. The use of wide-band ultrasonic fiber optic sensors in biomedical ultrasonic and optoacoustic applications is an open alternative to conventional piezoelectric transducers. These kind of sensors, made of biocompatible polymers,...

This article proposes the scheduling scheme using ultrasonic beacons in a multi-block workspace. Indoor scheduling schemes using ultrasonic sensors have been widely studied due to their cheap price and high accuracy. However, ultrasonic sensors are susceptible to environmental noises from their propagation characteristics. On account of their decay phenomena when they are transmitted over a lon...

The matched spectrum and correlation characteristics are both important to realize the multichannel ultrasonic sensors working together. The spectrum matching can make full use of the bandwidth of the ultrasonic ranging system, and the good correlation characteristic can eliminate crosstalk among multichannel ultrasonic sensors triggering simultaneously. Linear frequency modulation (LFM) excita...

Ultrasonic Sensors in Air are Intelligent Sensors, which use wave-propagation phenomena in air to measure physical or chemical variables. With accordance to the influence principle, two main types of ultrasonic sensors can be differentiated. Propagation-Pafh Sensors decode changes on propagation to get a fast measurement of temperature, pressure variations or gas concentration. Most important a...

The objective of this paper is to build a map using a quadrocopter. To explore the surroundings and build a map, ultrasonic sensors and a camera sensor are used. As ultrasonic and camera sensors get information separately, they have to be synchronized. Through this synchronization, the location of the quadrocopter can be recognized. At that point, the four horizontal distances can be calculated...

The paper describes a new method and system, designed for application to upper extremity prosthesis. Artificial limb with our new system is robot arm controlled by EMG signals and monitored and corrected by set of ultrasonic sensors. The control system used to control robotic arms measured EMG signals from muscles and the signal from the ultrasonic sensors detect obstacles in the robot's motion...

Ultrasonic sensors are ideal for non-destructive testing due to its many advantages over conventional sensors. Oil and gas pipelines are an area which uses ultrasonic sensors for monitoring and detecting the presence corrosion and defects. The proposed techniques ultimately aims at providing a continuous monitoring system using an array of ultrasonic sensors strategically positioned on the surf...

detecting microbial contamination of milk using novel engineering techniques is very worthy. in current study, microbial contamination of uht milk packages was detected using ultrasonic sensors. milk packages artificially were inoculated to e. coli in four dilutions and three replications. monitoring of ultrasonic properties was performed by measuring amplitude and time delay factors. artificia...