Suchergebnisse - accelerometer testing.

A simple and robust testing system based on a laser self-mixing grating interferometer (SMGI) is proposed to determine the sensitivity of accelerometers. Self-mixing grating interference occurs when the light emitted from a laser diode is incident onto a reflective grating at a fixed angle and the f...

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Animal behaviour is a significant component in the evaluation of animal welfare. Conducting continuous observations of animal behaviour is a time-consuming task and may not be feasible over extended periods for all animals. Thus, new technologies like sensors and cameras can be used to assess indivi...

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On-chip optical accelerometers can be a promising alternative to capacitive, piezo-resistive, and piezo-electric accelerometers in some applications due to their immunity to electromagnetic interference and high sensitivity, which allow for robust operation in electromagnetically noisy environments....

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This article presents a dynamic calibration procedure for triaxial accelerometers characterized by a very simple and low-cost setup, where the calibration bench consists of a vertically, freely rotating wheel. To keep the setup as simple as possible, the necessary prior knowledge about the geometry...

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Abstract Utilizing the advantages of a liquid metal (LM) (i.e., mercury) and its electro‐mechanical properties (i.e., high density, high surface tension, and high electrical conductivity), a novel capacitive‐type two‐axis accelerometer is proposed. The device employs a liquid‐type proof mass (i.e.,...

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Seismic noise is a major limitation for high-precision electrostatic accelerometer performance investigation on the ground. Various pendulums were developed to isolate the seismic noise, and the translation–tilt compensation pendulum is a new low-frequency passive horizontal vibration isolation pend...

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A new micro accelerometer is proposed to measure and reduce low-frequency vibrations actively. It is mainly composed of a seismic mass, a leaf spring, and a focus probe modified from a digital versatile disc (DVD) pickup head. When a vibration occurs, the leaf spring will exhibit an elastic deformat...

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A review of the author’s own research on tilt measurements in mechatronic devices by means of micromachined accelerometers is presented. This comprehensive study addresses such issues as adjusting metrological properties of a tilt sensor for the application in a specific kind of a mechatronic device...

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Smartphone-embedded inertia sensors are widely available nowadays. We have developed a smartphone application that could assess temporal gait characteristics using the built-in inertia measurement unit with the aim of enabling mass screening for gait abnormality. This study aimed to examine the test...

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Objectives: To determine the associations of motor proficiency (MP) with physical activity (PA) and sedentary behavior (SB) in young adults who are facing elevated risks of physical inactivity and underdeveloped motor competence nowadays. Methods: Using a cross-sectional design, 103 university stude...

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This work addresses the challenge of low-cost road quality monitoring in the context of developing countries. Specifically, we focus on utilizing accelerometer data collected from smartphones as drivers traverse roads in their vehicles. Given the high frequency of data collection by accelerometers,...

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Recent advances in radar systems have led to the development of radar interferometry (RI) methods for contactless vibration monitoring of large-scale structures, i.e. bridges, water tower reservoirs, and factory chimneys. Interferometric radars are devices capable to measure with 200 Hz sampling fr...

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The architecture and building possibilities of attitude system of unmanned and ultralight air vehicles based on modern inertial sensors are considered. Executed development testing has corroborated possibility of using micromechanic sensors for the construction of an inexpensive inertial navigation...

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IntroductionThe aim of this study was to determine patterns of physical activity in pet dogs using real-world data at a population scale aided by the use of accelerometers and electronic health records (EHRs).MethodsA directed acyclic graph (DAG) was created to capture background knowledge and causa...

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Monitoring parturient cattle during calving is crucial for reducing cow and calf mortality, enhancing reproductive and production performance, and minimizing labor costs. Traditional monitoring methods include direct animal inspection or the use of specialized sensors. These methods can be effective...

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Microseismic monitoring of rock mass, such as mines, will provide data about condition of mass on the borders of waste areas at different levels of implementation of mining. The main problems of monitoring are the information absence about condition of mass above waste areas also imperfection of equ...

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This paper is devoted to modal testing and to the problem of contactless measurements of a system response signal. The aim of investigation was to establish the best, contact less method for obtaining experimental data used in the process of modal analysis of vibrating objects. Measurements were car...

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Introduction. Diagnostic systems are designed to monitor the condition of operational components (for example, on the railway). It is imperative that micro-electromechanical systems (MEMS) equipped with acceleration sensors (accelerometers) be used as part of measuring diagnostic systems. It is know...

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Accurate and low-latency gesture recognition is critical for real-time assistive technologies that enable individuals with motor impairments to interact more intuitively with their environment. However, current systems often suffer from poor signal fidelity, limited adaptability, and high computatio...

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In the coal mine underground, in order to realize real-time monitoring of operatives location information, two-way voice communication, remote video monitoring, uploading photo records of three violations of information, monitoring of environmental parameters, abnormal posture detection, and text or...

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