Nanowerk April 10, 2024 Existing tactile sensing gloves fall short in terms of user comfort and are ill-suited for underwater applications. Researchers in China proposed and constructed a flexible hand gesture recognition glove (GRG) that contained high-performance micropillar tactile sensors (MPTSs) inspired by the flexible tube foot of a starfish. The sensor has a wide working range, superfast response time, reliable repeatability, and a low limit of detection and they were waterproof. When integrated with machine learning algorithm, the GRG system achieved intelligent recognition of 16 hand gestures under water, extending real-time and effective communication capabilities for divers. According to […]
Category Archives: Sensors
Research team creates global roadmap to advance printable sensors for sustainability and quality of life
Phys.org March 25, 2024 The dissemination of sensors could advance the sustainability and quality of our lives. Sensors based on printable electronic materials offer the ideal platform: they can be fabricated through simple methods (e.g., printing and coating) and are compatible with high-throughput roll-to-roll processing; printable electronic materials often allow the fabrication of sensors on flexible/stretchable/biodegradable substrates. Device innovations to enhance their ability to transduce external stimuli—light, ionizing radiation, pressure, strain, force, temperature, gas, vapours, humidity, and other chemical and biological analytes are necessary. An international team of researchers (Canada, Italy, USA – University of Wisconsin, Northwestern University, the Netherlands, […]
Novel method improves Fourier transform infrared spectroscopy detection of ultra-low concentration trace substances
Phys.org March 7, 2024 High-resolution solar spectra play a crucial role in research pertaining to atmospheric vertical profiles and analysis of atmospheric composition. However, the improvement of spectral resolution is subject to certain limitations due to hardware constraints. Researchers in China proposed multi-step linear prediction (MSLP) method based on sliding windows to enhance the spectral resolution of passive remote sensing FTIR spectra, thereby improving the accuracy and reliability of atmospheric composition analysis. Their method improved the spectral resolution of passive remote sensing FTIR spectra. In simulations, the MSLP method significantly enhanced the spectral resolution of passive remote sensing FTIR spectra. […]
Paper AI sensor mimics brain for health monitoring
Nanowerk March 11, 2024 Physical reservoir computing (PRC), which mimics the human brain using physical phenomena, offers a low-power consumption architecture. However, creating a flexible and easily disposable sensors using PRC capable of processing optical signals with sub-second response times suitable for biological signals presents a challenge. Researchers in Japan designed disposable and flexible paper-based optoelectronic synaptic devices which are composed of nanocellulose and ZnO nanoparticles, for PRC. The device exhibited synaptic photocurrent in response to optical input. The memory capacity of short-term memory task, indicating the device’s ability to store past information was 1.8. It could recognize handwritten digits […]
Correlation spectroscopy research shows network of quantum sensors boosts precision
Phys.org March 4, 2024 The coherence time of the quantum system surpasses that of the oscillator probing the system. Correlation spectroscopy overcomes this limitation by probing two quantum systems with the same noisy oscillator for a measurement of their transition frequency difference enabling very precise comparisons of atomic clocks. An international team of researchers (Austria, Israel, USA – Caltech) extended correlation spectroscopy to the case of multiple quantum systems undergoing strong correlated dephasing. They modelled Ramsey correlation spectroscopy with N particles as a multiparameter phase estimation problem and demonstrated that multiparticle correlations could assist in reducing the measurement uncertainties even […]
Research team develops a wireless sensor for spotting chemical warfare agents
Phys.org March 5, 2024 Researchers in China developed a 433 MHz passive wireless surface acoustic wave (WSAW) gas sensor for dimethyl methyl phosphonate (DMMP) detection. It includes a YZ lithium niobate (LiNbO3) substrate with metallic interdigital transducers (IDTs) etched on it, and an antenna was placed near the IDT… read more. Open Access TECHNICAL ARTICLE
Researchers turn a small photonic chip into a functional temperature sensor
Phys.org December 15, 2023 An international team of researchers (Belgium, Greece, Czech Republic) showed described in detail the process to obtain a fully packaged miniature photonic temperature sensor starting from bare PIC dies having Bragg grating sensors in a silicon waveguide. The PIC was interfaced from the back side using a 300 μm ball lens ensuring that the top surface remained clear of any interfacing fibers. Based on this they developed a solution for integrating a 1 mm × 1 mm sensor PIC with a single-mode fiber and packaging it in a 1.5 mm inner-diameter metal protective tube. A packaged […]
Researchers test seafloor fiber optic cable as an earthquake early warning system
Science Daily October 17, 2023 An international team of researchers (USA – Caltech, industry, Chile) provided a real‐data test for offshore earthquake early warning (EEW) with distributed acoustic sensing (DAS) by transforming submarine fiber‐optic cable into a dense seismic array. They constrained earthquake locations using the arrival‐time information recorded by the DAS array and earthquake magnitudes were estimated directly from strain rate amplitudes by applying a scaling relation transferred from onshore DAS arrays. According to the researchers their results indicate that using this single 50 km offshore DAS array can offer ∼3 s improvement in the alert time of EEW […]
Novel thermal sensor could help drive down the heat
Science Daily July 24, 2023 Excess heat from electronic or mechanical devices is a sign or cause of inefficient performance. In many cases, embedded sensors to monitor the flow of heat could help engineers alter electronic or mechanical devices behavior or designs to improve their efficiency. Researchers in Japan explored the way a heat flux sensor consisting of certain special magnetic materials and electrodes behaves when there are complex patterns of heat flow. They etched desired patterns into the resultant film, similar to how electronic circuits are made. They designed the circuits in a particular kind of way to boost […]
Proposed metamaterial could have a wide range of applications, from sensing to stealth technology
Phys.org July 17, 2023 Materials scientists are actively hunting for metamaterials that are “perfect absorbers” of electromagnetic radiation with controllable resonance characteristics that lead to their wide usage in applications as varied as solar cells, thermal radiation imaging, sensing technology, and even stealth technology. An international team of researchers (Pakistan, USA – University of Alabama) has developed a triple-band perfect metamaterial absorber in terahertz regime that is made of asymmetric metallic I-shaped resonator and metallic ground layer with dielectric spacer in the middle. The simulated results showed that the absorption device had three resonance modes with corresponding absorption rate close […]