568results about "Burglar alarm mechanical vibrations actuation" patented technology

An image-taking apparatus includes an image-pickup element having a plurality of pixels; a control section selectively performing a first image-taking operation using the image-pickup element or a second image-taking operation at a higher pixel number or a lower frame rate than for the first image-taking operation; and a detecting section detecting a state of an image-taking object. The control section performs the first image-taking operation when the state of the image-taking object detected by the detecting section is within a predetermined range, and performs the second image-taking operation when the state of the image-taking object detected by the detecting section is outside the predetermined range.

An electric field proximity detector capable of detecting partially conductive or conductive objects regardless of their impedance to circuit ground. The detector has a sensor with a transmitting electrode, a receiving electrode, and at least one circuit ground electrode preferably arranged in a bulls-eye configuration with the ground electrode between the transmitter and receiver electrodes. With appropriate sizing, upon the approach of an object, a signal received by the receiving electrode decreases, at least until the object is within a threshold distance of the sensor. The size and positioning of the ground electrode further reduces the effects of stray capacitance.

A video monitoring device, comprising: receiving means for receiving a video stream from a video source; manually operable means for setting a detection mode among at least two modes, the detection mode being solely set for the video source; motion detection means for detecting motion in the video stream in accordance with the detection mode set by said manually operable means, said motion detection means obtaining and computing a set of images from the video stream according to the detection mode; and output means for outputting the result regarding to the motion detected by said detection means.

An anti-theft system for protecting a vehicle exhaust component (4) is described. The system includes a sensor (1) configured to monitor vibrations associated with a vehicle exhaust system (5)and a controller (2) arranged to monitor a signal from the sensor (1). The controller (2) is configured to generate an alarm event if the signal from the sensor includes characteristics indicative of vibrations associated with an attempted theft of the vehicle exhaust component (4).

The present invention involves a system and method for detecting a graffiti-making act such as the spray of a spray paint can, the writing with a felt-marker pen on a surface, and the scratching with an abrasive instrument on a surface. The system includes one or more sensors adapted to sense the graffiti-making act and transmit a signal representative of the graffiti-making act, and a base unit including electronics adapted to process the signal and determined whether the signal represents a graffiti-making act, and a communication device coupled to the electronics and adapted to communicate to one or more entities that a graffiti-making act has been detected. The method includes sonically detecting the graffiti-making act, and initiating an alarm indicating that the graffiti-making act took place.

A method of detecting a particular abnormal sound in an environment with background noise is provided. The method includes acquiring a sound from a microphone, separating abnormal sounds from the input sound based on non-negative matrix factorization (NMF), extracting Mel-frequency cepstral coefficient (MFCC) parameters according to the separated abnormal sounds, calculating hidden Markov model (HMM) likelihoods according to the separated abnormal sounds, and comparing the likelihoods of the separated abnormal sounds with a reference value to determine whether or not an abnormal sound has occurred. According to the method, based on NMF, a sound to be detected is compared with ambient noise in a one-to-one basis and classified so that the sound may be stably detected even in an actual environment with multiple noises.

A firearm discharge detection device and alarm system featuring a plurality of detector units placed inside a structure which communicate with a central monitoring unit. Each detection unit will detect the discharge of a firearm in its proximity from decibel levels and duration using on board filters and timers and thereon signal the central monitoring unit. A digitized embodiment may also be used to determine the sound of a firearm using a digitized fingerprint of the sound compared to an library of firearm sounds in onboard memory by a microprocessor. The central monitoring unit will thereupon communicate with all the other detection devices installed to sound an audible and/or visible alarm to occupants to exit. Concurrently the central monitoring unit will communicate the firearm discharge and location to police. An optional directional exit alarm or warning to hide may also be activated.

The invention discloses a ground wave micro vibration direction servo tracking and monitoring device and a control system thereof. The monitoring device comprises a base, a motor bracket, a motor, a U-shaped bracket and a camera; the control system comprises a micro vibration monitoring sensor, a single chip microcomputer, a chip drive module, the motor, U-shaped bracket and the camera. According to the ground wave micro vibration direction servo tracking and monitoring device and the control system thereof disclosed by the invention, a vibration detection perimeter intrusion alarm system is realized by utilization of an MEMS (Micro electro mechanical system) chip sensing technology; meanwhile, the features of an underground micro vibration source direction can be judged by utilization of a vector ground wave sensor, and an existing ground video monitoring camera can be subjected to servo tracking; compared with the same type of monitoring equipment, the ground wave micro vibration direction servo tracking and monitoring device has the advantages of being reliable in action, novel in structure, wide in work vision (free from monitoring dead angle) and high in response speed.

A system and a method for detecting, locating and identifying incidents of approaching a linear installation (e.g.—buried pipe line, railway, fence etc.), that includes plurality of sensing units positions in an array along the length of the linear installation, at a distance one from each other, wherein each unit includes at least one sensor for sensing seismic or acoustic interference or noise/s (in accordance with the configuration of the system, namely either as buried system or as an above the ground one), and the issuance of a suiting indicating signal; a signal processor for analyzing the signal and comparing it to a cache (data bank) of seismic or acoustic interference or noise signatures that is embedded in the sensor unit; and a communications device for transferring data from the sensor unit to a distant command and control center.

The invention relates to the technical field of special robot systems, in particular to a household security robot system based on wireless communication. The system comprises a robot body and an intelligent control terminal. The robot body is equipped with a mechanical arm and a camera. A base is arranged at the bottom of the robot body. A driving device, a storage battery, a main control unit, a data memory, a sensor unit, a wireless communication unit, a household control unit, an electric quantity detection device, a speech recognition device and an alarm are arranged on the base. A sensor unit comprises an obstacle avoiding sensor and a human body infrared sensor. The speech recognition device comprises a microphone and a sound positioning device. The security robot system has various functions, and is capable of achieving remote control, highly practical and suitable for promotion in the field.

Devices, methods and systems for detecting an unauthorised person. The method comprises monitoring an indication of whether an authorized person is present within a detection space and detecting activity within the detection space. If activity is detected within the detection space and the monitoring indicates that an authorised person is present within the detection space, the method further comprises determining based on the detected activity whether an unauthorised person is present within the detection space.

An alarm system having the capability to self-adjust or self-calibrate itself is disclosed. The system includes an alarm controller and at least one sensor that generates a signal that corresponds to the magnitude of a detected event. The signal evaluator is part of the alarm controller and receives the magnitude signal from the sensor. The signal evaluator compares the magnitude signal to a user-defined or preset alarm sensor sensitivity threshold and generates an alarm signal if the magnitude signal exceeds the alarm signal sensitivity threshold. If repeated alarm signals are generated, an alarm threshold adjuster will adjust the sensor sensitivity threshold to a point where repeated magnitude signals will be ignored. The system will reset itself to the original user-defined or preset sensor sensitivity threshold levels after a predetermined time of no alarm signal generation. The alarm signals generated will activate an alarm annunciator, which generates an alarm.

The invention discloses a portable intelligent alarm fence, and belongs to the technical field of a safety protection appliance. The portable intelligent alarm fence comprises a plurality of vertical rods, an entrance guard module and a host computer. Two adjacent vertical rods are connected through arrangement of a telescoping band, the telescoping bands are arranged inside the vertical rods, processors are arranged at lower positions inside the vertical rods, the processors are respectively electrically connected with cameras, acousto-optic alarm modules and distance measuring sensors, the processors communicate with the host computer through a wireless network, and the vertical rods are also internally provided with rechargeable batteries. According to the invention, the ultrasonic distance measuring sensors carry out detection by use of a supersonic wave echo ranging principle according to a Doppler effect of a mobile object, human identification is finished by use of an image processing means, and the problems of sensitivity to ambient temperature in human identification and insensitivity to object barriers in the human detection when infrared sensors are used for detecting specific-wavelength infrared rays emitted by a human body are solved.

A method of automated identification of specific sounds in a noise environment, comprising the steps of: a) continuously recording the noise environment, b) forming a spectral image of the sound recorded in a time/frequency coordinate system, c) analyzing time-sliding windows of the spectral image, d) selecting a family of filters, each of which defines a frequency band and an energy band, e) applying each of the filters to each of the sliding windows, and identifying connected components or formants, which are window fragments formed of neighboring points of close frequencies and powers, f) calculating descriptors of each formant, and g) calculating a distance between two formants by comparing the descriptors of the first formant with those of the second formant.