Excavation equipment recognition attracts increasing attentions in recent years due to its significance underground pipeline network protection and civil construction management. In this paper, a novel classification algorithm based on acoustics processing is proposed for four representative excavation equipments. New acoustic statistical features, namely, the short frame energy ratio, concentration of spectrum amplitude truncated range, interval pulse are first developed characterize...

Single-molecule displacement/diffusivity mapping (SMdM) has revolutionized the study of molecular motion in live cells by providing high spatial resolution insights. However, its utility is restricted measurement biases and low throughput, making it challenging to capture temporal dynamics intracellular diffusivity. Here we report a high-throughput single-molecule diffusivity microscopy approach (Hi-SMdM) that rapidly unbiasedly maps nanoscale heterogeneities inside mammalian cells, enabling...

Capacitive flexible pressure sensors, with the advantages of simple structure, reliable repeatability, and low energy consumption, have been widely used in wearable devices, soft robots, other fields. This article describes preparation a polydimethylsiloxane (PDMS) sponge dielectric layer surface microstructure dense internal bubbles by adding ammonium bicarbonate to PDMS, using sandpaper as template, utilizing thermal decomposition into three gases: ammonia, carbon dioxide, water vapor...

In this study, a graphene foam/polydimethylsiloxane (GF/PDMS) force-sensitive composite with excellent electrical, mechanical, and electromagnetic interference (EMI) shielding performances was prepared. GF different contents of prepared by chemical vapor deposition (CVD) GF/PDMS composites were vacuum-assisted impregnation. The electrical test morphology detection indicated good conductivity flexibility the proposed composite. Indeed, 0.4 wt% had highest (4 S cm −1 ). EMI performance in...

In order to obtain a flexible strain sensor with higher sensitivity, resistive based on the AgNWs-graphene-PDMS sensitive layer is prepared in this paper. This paper presents preparation of layer, and encapsulation sensor, performance tests AgNWs-graphene (AgNWs-Gr) mixtures at different concentrations. The test results indicate that has wide detection range maximum stretchable length 118%. AgNWs-Gr mixture concentration 5% highest sensitivity up 236. It also good repeatability, stability,...

Hybrid Brain-Computer Interfaces (BCI) has shown great promise for neuro-prosthetics and assistive devices in the field of rehabilitation. However, complexity involved with system design time cost classification motor tasks is a core problem when we step into clinical applications. To help address this problem, simultaneous measurements Electroencephalography (EEG) functional Near-Infrared Spectroscopy (fNIRS) signals were carried out on three healthy volunteers under left-right hand...

Underground pipeline network suffers severely destructions by external excavation equipments in most of the developing countries nowadays. Thus, it is urgent to construct an intelligent surveillance system automatically detect earthmoving excavations along network. In this paper, we analyze acoustic signal based recognition method for equipment detections. To enhance performance, a new feature signals on AR model named one-sided autocorrelation linear predictive cepstrum coefficients...

In this paper, we propose a hardware design for an effective real time indoor localization system staff working in high-risk manufacturing areas. Because of the special requirements our system, chirp spread spectrum (CSS) is most suitable technology. The details new are described. involves several anchors, tags, and gateway, all which use nanoLOC TRX transceiver (NA5TR1) RF chip (Nanotron Co., Germany), based on CSS To validate effectiveness both ranging tests were carried out. difference...

Location based services (LBS) provided by wireless sensor networks have garnered a great deal of attention from researchers and developers in recent years. Chirp spread spectrum (CSS) signaling formatting with time difference arrival (TDOA) ranging technology is an effective LBS technique regards to positioning accuracy, cost, power consumption. The design implementation the location engine management on TDOA algorithms were focus this study; as core system, was designed series smoothing...

A multi-node cooperative localization method is proposed based on dead reckoning and particle filter, which can enhance the robustness accuracy of whole network. Only one reference node needed to conduct position estimation unknown node. navigation network constructed using information each node, such as unmanned aerial vehicles, ground platforms even dismounted soldiers etc. Each required share positioning information. And when some nodes are disabled under circumstances GPS failure or...

Wireless sensor networks based on the ZigBee technology was designed and deployed in chemical plant. Because of complex indoor environment workshop, method positioning through GPS signal is hard to reach. This paper proposed a low power consumption, cost scheme which can overcome disadvantage above extend battery life devices. Enterprise Ethernet RS-485 field bus used as data transmission network. The collection system included several network coordinators, reference nodes blind using TI's...

This paper proposes a new type of flexible force-sensitive structure that is resistant to gamma radiation and made tungsten oxide (WO3) powder, polydimethylsiloxane (PDMS), carbon nanotube (CNT) sponge. The thickness the sample was 2.2 mm, middle interlayer composed sponge PDMS form conductive layer, upper lower layers were PDMS, which formed gamma-ray shielding layer. When particle size powder 50 nm, 100 1 µm, composite exhibited better performance. irradiated with doses 5, 20, 50, KGy...

VPP (Visual Programming Platform) is an integrated software development environment for Virtual Instrument (VI). It based on a dynamic Extended Dataflow Language (EDFL) and allows users to graphically create block diagrams of their applications interactively control inputs, outputs, system variables. builds top some experiences HP-VEE/LabVIEW, easier user, more compatible supported quite time. The structure semantics EDFL are presented. With precise specification language's model, it in many...

A novel GaAs based micromachined gyroscope with electrostatic driven meso-piezoresistive detection is presented, the advantage of high sensitivity and simple fabrication process comparison silicon based. According to present technology, fabricated capsulated. The knocking experiment in direction preliminary verify that can be successfully driven. test also carried out. From testing result it know 100.74mV / g case 4KHz different gravity acceleration.

A temperature-compensated optical fiber twist sensor based on cascaded long-period gratings (LPFG) and Bragg grating (FBG) is proposed experimentally demonstrated. The LPFG sensitive to its transmitted light modulated reflected by the FBG. In this way, a single-ended realized monitoring reflection spectrum of cascade grating. Both wavelength amplitude are detected. temperature but not twist, so it used for compensation in measurement. Experimental results show that improves accuracy 2 orders...

Underground pipeline network suffered severe breakages caused by external road excavation equipments in the mainland of China nowadays. The frequent underground serious economic loss to urban living and industry manufacturers. Therefore, designing a surveillance system which can automatically detect potential damages is essential urgent for protection. With this objective, we investigate two frequently used equipments, namely, electric hammer cutting machine, based on acoustic signal...

A method of detecting the single channel triaxial magnetic field information based on diamond nitrogen-vacancy (NV) color center is introduced. Firstly, incident angle bias which can achieve equal frequency difference optically-detected resonance (ODMR) spectrum NV calculated theoretically, and solution model also constructed. Secondly, microwave time-controlled circuit module designed to generate timing pulse signals in one channel. Combining with optical detection technology, purpose...

This paper studied the radiation hardness of InAs Quantum Dot(QD) embedded in high electron mobility transistor (HEMT) for force-sensitive structure, and further verified its irradiation properties sensitivity. The transfer characteristics, output structural changes force-sensitivity QD-HEMT HEMT structure are analyzed after irradiated with 1900-Mev <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">181</sup> Ta ions at different fluences....