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In this study, changes in the pulse direction and flight path of bats during an obstacle-avoiding flight were experimentally investigated. While flying in unfamiliar space, bats often produced pairs of emissions (double pulses) and shifted the pulse direction between immediate obstacles and their intended flight direction. To confirm the practical effectiveness of the bats' behaviour, the observed...
This paper proposes a novel approach for constructing a docking path for underwater vehicles, using a new spiral resulting of combining the Fermat and logarithmic spirals. The proposed spiral path has two properties that will help solve some of the challenges of docking autonomous underactuated vehicles (AUVs). The first property is that the spiral path reaches the entrance of the docking station...
Substrate computing refers to a paradigm where sensing, computing, communications, energy scavenging and energy storage functions are seamlessly integrated within a substrate. The substrate could be a part of an aircraft wing or a chassis of the car and the computing, communications and energy scavenging functions could be implemented using self-powered devices embedded inside the substrate. In this...
In this paper a stick guide model represented for visually impaired persons to guide in their way, which consist of a Global Positioning System (GPS) and a Global System for Mobile communication (GSM) modules along with sensors like Ultrasonic and Infrared sensors. This is a smart stick that will make the visually impaired persons guiding their way. GPS module is used in this to get the current location...
Detection of targets using low power embedded devices has important applications in border security and surveillance. In this paper, we build on recent algorithmic advances in sensor fusion, and present the design and implementation of a novel, multi-mode embedded signal processing system for detection of people and vehicles using acoustic and seismic sensors. Here, by "multi-mode", we mean...
Ultrasonic sparse array can increase the resolution by enlarging the aperture without adding system complexity, and it has characteristics of large scanning range and high detection accuracy, which is one of the most promising applications of ultrasonic nondestructive testing technology. The application of reciprocity theory to scattering of guided waves by flaws was studied. A finite element model...
We present a novel composite comprised of piezoelectric PMN-PT nanoparticles embedded in a SU8 polymer matrix that can be spin coated on any substrate to realize acoustic resonators and transducers. High Overtone Bulk Acoustic Resonators (HBARs) are fabricated using this novel composite on a low acoustic loss silicon substrate. Initial experimental results yield piezoelectric coefficient (d33) as...
Micro Aerial Vehicles(MAVs) have been seen rapid progress in the indoor entertaining, security monitoring, as well as search and rescue activities. Localization capability is one of the basis of MAVs autonomous movement and path planning. This paper proposes a novel indoor localization algorithm using a prior map for the mini MAVs with a sparse sonar array. Four mutually perpendicular installed ultrasonic...
This paper presents the first fully ultrasonic (US) high-precision implantable sensor with active US links for power-up, data downlink, and data uplink. The packaged implant measures just 1.7×2.6×8.1mm3 and includes a custom IC, piezoelectric devices (piezos) designed for data/power links, and a pressure transducer (PT). Characterization is performed at a large depth of 12 cm, in a phantom material,...
Recently, many concrete social infrastructures are beginning to reach the end of their useful lives. Therefore, it is important to evaluate their condition. In this paper, we propose a method of concrete crack direction detection using visual and audio sensors. Firstly, three-dimensional measurement of the concrete surface is performed by using the light-section method. The obtained point cloud data...
In this paper the practical issues of automotive surface identification system development are considering. The novelty of this work is the combining of different training algorithms, neural network structures and methods to increase the classification accuracy and avoid overfitting of real-world data. The obtained results thereby demonstrate that the use of proposed system architecture and statistical...
Indoor positioning systems provide location information without the ability to use GPS. Indoor positioning faces challenges of accuracies and pervasiveness. In this paper, we present SilentWhistle, a mobile system that incorporates acoustic information and motion traces on smart phones to locate users. SilentWhistle does not expose the identity of a mobile device as does Bluetooth or Wi-Fi communications...
VibSense pushes the limits of vibration-based sensing to determine the location of a touch on extended surface areas as well as identify the object touching the surface leveraging a single sensor. Unlike capacitive sensing, it does not require conductive materials and compared to audio sensing it is more robust to acoustic noise. It supports a broad array of applications through either passive or...
Wirelessly networked systems of implantable medical devices endowed with sensors and actuators will be the basis of many innovative, sometimes revolutionary therapies. The biggest obstacle in realizing this vision of networked implantable devices is posed by the dielectric nature of the human body, which strongly attenuates radio-frequency (RF) electromagnetic waves. In this paper we present the first...
This paper will discuss an embedded system for Structural Health Monitoring (SHM). The system designed is a working proof of concept prototype made for an SHM system using Piezoelectronic transducers as the sensors. The system uses pulse-echo and pitch-catch techniques to find the location of damage and the width of the damage. If damage is present, the system will generate an email and send to the...
A load variation tolerant readout interface with embedded gain control and discrete power control to improve the linearity for a MEMS capacitive microphone is presented. The current consumption of the readout circuit is controlled discretely by digital codes as the loading capacitance changes while maintaining the operating point of each MOSFET in the readout circuit. The proposed discrete power control...
Now a large number of pipelines in Russia is in an unsatisfactory condition which is connected either with the big term of their operation or their improper installation. For the first-priority replacement of the most injured sites, it is necessary to develop a technique for their identification. The article describes the method of determining the pipeline defect location according to the analysis...
Cross-device interaction is becoming an increasingly hot topic as we often have multiple devices at our immediate disposal in this era of mobile computing. Various cross-device applications such as file sharing, multi-screen display, and cross-device authentication have been proposed and investigated. However, one of the most fundamental enablers remains unsolved: How to achieve ubiquitous multi-device...
Equipment malfunction in electric power plant may lead to catastrophic losses which can lead to significant economic losses, as well as harm to the reputation of the utility who is operating the power plant. Therefore, it is desirable to detect anomalous behavior in equipment, that in the future, might lead to damage or failure of that or other connected equipment. Equipment damage can increase operations...
In this paper, we introduce a novel acoustic-inertial navigation system (AINS) for Autonomous Underwater Vehicles (AUVs). We are aiming to reduce the cost and latency of current underwater navigation systems that typically employ high-accuracy and thus high-cost inertial sensors. In particular, the proposed approach efficiently fuses the acoustic observations from a 2D imaging sonar and the inertial...
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