A portable lighting and warning device includes: a housing; a lighting generator unit; a sensor unit sensing shaking of the housing to generate a sense output; a mode selector unit generating a mode indication signal; a warning generator unit; and a controller unit. In a case where the mode indication signal indicates a lighting mode, the controller unit controls the lighting generator unit to emit light. In a case where the mode indication signal indicates a warning mode, the controller unit waits for a predetermined pause time, and then controls the warning generator unit and the lighting generator unit to output sound and emit light when the sense output corresponds to the shaking of the housing not less than a predetermined level in intensity.

From each of a plurality of cameras, a visual input of a location is received over a network. For each visual input from the plurality of cameras, a coupling correction is performed between a shaking of the camera with respect to the visual input by subtracting velocity vectors of the plurality of cameras from velocity vectors of pixels defining the visual input to provide a processed input. It is determined whether a shaking identified in the processed input is above a predetermined threshold based on the processed input, thereby detecting one or more anomalies. From the one or more anomalies, at least one of a location, magnitude, or depth of an earthquake are inferred based on the shaking identified in the processed input of each of the plurality of cameras.

Parallel dipole line (PDL) trap seismometer and vibration sensors are provided. In one aspect of the invention, a seismometer is provided. The seismometer includes: at least one PDL trap having a pair of dipole line magnets, and a diamagnetic object levitating above the dipole line magnets; and a sensing system (passive or active sensing) for determining a position of the diamagnetic object relative to the dipole line magnets and to yield the seismic signal in terms of displacement or acceleration. Methods for sensing vibrations using the present PDL trap seismometer and vibration sensors are also provided.

The present disclosure is drawn to methods and systems for determining a seismic response of a man-made structure to a given input earthquake. Sensors are used to obtain vibration data for data collection locations from one or more floors of the man-made structure, which may be ambient vibration data or vibration data resulting from forced vibration or shock testing. The vibration data is used to determine modal characteristics for the man-made structure, including mode shapes, natural frequencies, and damping ratios. The mass, centre-of-mass, and moment of inertia is also determined for the floors of the man-made structure. The modal characteristics are then translated from the data collection locations to the centre-of-mass based on the structure of the floors. Then, a seismic response of the man-made structure to an input earthquake is determined using the translated modal characteristics and the mass and moment of inertia of the floors.

This invention is about a detection device based on the piezoelectric property of geological minerals. The device has a vibration detector for compressing geological minerals to generate charges, so as to detect vibration and a physiotherapy jacket for carrying out quantitative physiotherapy on a human body by detecting the amount of charges. The system has the advantages of: being simple in structure, comprising the vibration detector and the physiotherapy jacket, using the piezoelectric property of geological minerals such as quartz and tourmaline, so as to realize detection of environmental vibration indoors, underground or in the field, and improving the safety factor of geological exploration operations.

In a display system, each of a plurality of sensor terminals estimates first information based on accumulated first measurement data and transmits the first information to a display device. The display device synchronizes a received plurality of kinds of the first information at time and classifies the plurality of kinds of first information into a plurality of first information groups, estimates, based on position information of the plurality of sensor terminals and the first information included in each of the first information groups, updates the first information group, generates, for each of the updated plurality of first information groups, based on map information including a region where a structure is located, image information including a distribution of values of the first information on a map, and displays an image based on the image information.

A method for using microseismic data during an injection or perforation event includes injecting fluid or perforating a well to create cracks in the formation. Microseismic data is obtained from the formation and forward modelling source parameter estimations are performed using a full moment tensor space source model and a double-couple source model. Likelihoods of the microseismic data are calculated for each model type by forward modelling synthetic data from a sampled source parameter probability distribution derived from each estimation, and by comparing the synthetic data with the microseismic data. The likelihoods are marginalized over prior probabilities for the source models, and Bayesian inference converts the likelihoods and prior probabilities to posterior probabilities. The posterior probabilities for the full tensor space and double-couple source models are compared to reveal whether an event is a fracture opening, fracture closing, or a slip on a fault plane.

An information processing device includes: a receiver configured to receive an emergency signal indicating occurrence of a disaster; an acquisition unit configured to acquire traveling data from a predetermined small size vehicle in a case where the emergency signal is received; and a generation unit configured to generate map information indicating passable route passable for a person based on the traveling data, the passable route including a route including a place other than an existing road.

Power consumption of a seismic sensor is suppressed. The seismic sensor is operated in a power-saving mode and a measuring mode in which the power consumption is larger than that of the power-saving mode. The seismic sensor includes: a measuring part configured to measure an acceleration; an index calculator configured to transition from the power-saving mode to the measuring mode to calculate an index value indicating a size of an earthquake when the acceleration measured with the measuring part exceeds a first threshold; and a threshold adjuster configured to change the first threshold so as to increase the first threshold relative to a predetermined reference value when a tendency of the acceleration measured with the measuring part satisfies a predetermined condition.

A structure safety detection system includes a first sensor, a second sensor, and a server. The first sensor detects a wobble and slant state of a structure and generates a corresponding first detection result. The second sensor detects a characteristic width of the structure and generates a corresponding second detection result. The server analyzes the first detection result and the second detection result and generates a corresponding first analysis result.