121results about How to "Extend the sensing range" patented technology

A dual-diaphragm acoustic transducer includes a substrate defining an opening, an inner diaphragm and an outer diaphragm concentrically mounted at one same side of the substrate corresponding to the opening of the substrate, and a plurality of elastic supporting members connected between the outer perimeter of the inner diaphragm and the inner perimeter of the outer diaphragm. Thus, when a sound wave enters the opening of the substrate, the sound wave pressure forces the outer diaphragm to displace and to carry the inner diaphragm to move, and the inner diaphragm itself will also be forced by the sound wave pressure to have a larger displacement than the outer diaphragm, enhancing the sensitivity. Further, using the inner and outer diaphragms to respond to different sound wave pressures can enhance the sound wave pressure sensing range.

Provided is an apparatus and method for hierarchically providing a context-aware service by real-time user behavior analysis, autonomously collecting information required for the context-aware service using a smart device, and autonomously configuring the service. The apparatus for hierarchical context awareness and device autonomous configuration through a real-time user behavior analysis includes a fast context aware engine configured to receive user data, infer a context, and provide a primary response context aware service, and a fine context aware engine configured to provide a secondary response context aware service using context information inferred by the fast context aware engine and machine learning prediction data, wherein the fast context aware engine reconfigures a resource of a smart device to suit a service.

The invention relates to an optical fiber acousto-optic torsion and displacement sensor and more particularly, to a torsion and displacement sensor arranged on an acousto-optic modulator based on a few-mode or multi-mode optical fiber. The optical fiber acousto-optic torsion and displacement sensor of the invention, more particularly, relates to a torsion and displacement sensor arranged on an acousto-optic modulator based on a few-mode or multi-mode optical fiber. The sensor of the invention is designed to overcome the axial angle torsion in construction structure security and internal damage detection as well as the shortcomings of the current technology of a micro displacement sensor and therefore, an optical fiber acousto-optic torsion and displacement sensor suitable for use in a micro space dangerous environment is provided. Through the transmission of detection light in different modes by the optical fiber acousto-optic modulator through one single few-mode optical fiber, the detection light is converted by the different angle torsions and the micro displacement amounts of a detected object into the torsion amount and the displacement amount of an image monitoring and capturing system; and an image identifying algorithm realizes the dynamic monitoring. According to the invention, in a dangerous environment, the sensor can simultaneously the axial torsion and the three-dimensional micro displacement of a detected object, and is not provided with the intersecting sensitivity between the temperature and the axial stress, therefore, capable of being created by a cost-effective image identifying system.

The invention relates to the technical field of fire detection and particularly relates to an intelligent fire detection and alarming system. The intelligent fire detection and alarming system comprises monitoring points, a first sensor module, a second sensor module, a third sensor module, a monitoring terminal, a data analysis and comparison module, an unmanned aerial vehicle monitoring module and a remote sensing image receiving module, wherein the monitoring points comprise an indoor acquisition point and an outdoor acquisition point, the first sensor module is arranged at the indoor acquisition point, the fire thus has a large sensing range, and the application scenes are wide; the unmanned aerial vehicle monitoring module is internally provided with a photographing module, the fire condition in a fire field can be photographed in real time, and a commander at the monitoring terminal can make proper treatment in time; and the remote sensing image receiving module receives a remotesensing image of the fire field in a first time, a fire condition history database is matched for analysis, and high efficiency and safety of a fire extinguishing process are more facilitated.

A sensing margin expanding scheme for a memory and a method therefor is disclosed. A first terminal of a first capacitor is coupled to a bit line. A first terminal of a second capacitor is coupled to a reference voltage. In a first phase, the controller controls a first common switch and a second common switch to store the voltage difference between the bit line and the reference voltage to the first capacitor and the second capacitor. In a second phase, controlling the first common switch and the second common switch to open the first terminal of the first capacitor and the second terminal of the second capacitor and open the second terminal of the first capacitor and the first terminal of the second capacitor, and then coupling the second terminal of the first capacitor and the second terminal of the second capacitor to a common voltage.

The invention relates to an escalator armrest illuminating device, and belongs to the field of elevator auxiliary equipment. The escalator armrest illuminating device comprises an armrest belt; an armrest bracket is mounted below the armrest belt; and the bottom of the armrest bracket is fixedly connected with an armrest illuminating lamp strip wire groove. The escalator armrest illuminating device is characterized in that an armrest illuminating lamp wire groove cover is arranged at the lower end of the armrest illuminating lamp wire groove; an armrest illuminating lamp strip is mounted in the armrest illuminating lamp wire groove; the armrest bracket and the armrest illuminating lamp wire groove are connected by a cross head sunk screw; and multiple pressure sensors are arranged on the armrest belt for connecting with the armrest illuminating lamp strip through time relays. The escalator armrest illuminating device has the following beneficial effects: as the lamp strip is mounted in independent wire groove without suffering from the effect of external force, the lamp strip is guaranteed to be not pressed and damaged; meanwhile, the mounting mode is simple in installation and convenient for maintenance; and as the pressure sensors, the time relays and an independent power supply are used, the energy is saved, and the illumination still can be guaranteed in external power failure.