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7551062 |
Directional acoustic device
A directional acoustic device configured for producing a directional output along an acoustic axis, including at least one transducer configured to create at least two wave trains which are...
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7535351 |
Acoustic intrusion detection system
An active acoustic intrusion detection system includes a pair of dipole emitters (180 degrees out of phase with each other) which emit an audible frequency f (preferably 1 KHz) and a pair of...
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7480208 |
Occupancy sensor assembly
An occupancy sensor is provided with a housing having an interior cavity. A switch is mounted in the interior cavity of the housing and configured for placement in the open and closed positions. A...
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7360417 |
Fluid level detector
A fluid detector for determining a presence of a fluid within a container includes a piezoelectric element that outputs a first ultrasonic signal in response to an input electrical signal and a...
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7236088 |
Device for detecting obstacle located backward of automobile
A device for detecting an obstacle located backward of a vehicle is mounted on a vehicle such as a pickup truck having a rear loading space and a tailgate for closing the loading space. Ultrasonic...
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7233544 |
Harbor fence
Methods and apparatus determine if an intruder passes into a security zone that is associated with a waterfront asset. An embodiment of the invention provides a harbor fence system that is designed...
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7180442 |
Target indentification method using cepstral coefficients
A method of identifying an unknown target comprising creating a density function of cepstral coefficients for a known target; receiving a signal from the unknown target; transforming the signal...
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7138938 |
System and method for preemptively sensing an object and selectively operating both a collision countermeasure system and a parking assistance system aboard an automotive vehicle
A system and method for preemptively sensing an object in the potential drive path of an automotive vehicle and selectively operating both a collision countermeasure system and a parking assistance...
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7091902 |
Systems and methods for characterizing the coverage of ad hoc sensor networks
The systems and methods according to this invention disclose that coverage for an ad hoc sensor network is fundamental to the deployment and utilization of such networks. The invention provides a...
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7057497 |
Security device
A security device includes an impact sensing unit for sensing an impact, a sound pressure sensing unit for sensing a sound pressure, an abnormal degree determination unit for determining an...
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7049960 |
Method and system for locating objects
An area is established by positioning a string of boundary objects that are reflective to a range of ultrasonic frequencies. Tracking objects may be placed inside the area which also are reflective...
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7030741 |
Vehicle-mounted intrusion detection apparatus
A vehicle-mounted intrusion detection apparatus for detecting an intrusion into a vehicle based on a wave transmitted inside the vehicle and reflected from an object located inside the vehicle,...
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7027355 |
Ultrasonic displacement sensor using digital signal processing detection
An apparatus and method is provided for detecting motion or displacement of an object in a monitored zone. The apparatus is disposed between a load and a power source and comprises a transmitter...
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7025348 |
Method and apparatus for detection of multiple documents in a document scanner using multiple ultrasonic sensors
An apparatus ( 10 ) for detection of multiple documents ( 42 ) in a document transport system comprises a first transmitter ( 13 ) emitting a first signal at a first interval through a document...
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7015812 |
Sound protecting headset with proximity collision avoidance protection
A proximity warning system is disposed in a sound protecting earmuff-type headset or other means of providing acoustic ear protection. The ear protector prevents the user from hearing damage from...
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6943726 |
Device for searching a parking space
A device for detecting parking spaces for vehicles includes a distance-measuring beam-type sensor system disposed on a road vehicle, and a signal processing system. The distance-measuring beam-type...
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6912429 |
Home automation system and method
A home automation system and method for automatic control of controlled devices throughout a home. A unique architecture of occupancy sensors includes entry/exit sensors for detecting movement...
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6909397 |
Stabilizing motion in a radar detection system using ultrasonic radar range information
One preferred embodiment of the present invention provides a system and method for suppressing motion artifacts introduced by movement of a radar detection system. Briefly described, in...
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6865138 |
Back-up detecting device with a distance reset capability
A back-up detecting device with a distance reset capability has a controller with an intensity analysis program and a distance reset function. When an ultrasonic transceiver is installed underneath...
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6862253 |
Sonic identification system and method
A neural net sonic identification system includes an ultra-sonic emitter and receiver configured to detect characteristics of a subject by detecting reflections of the ultrasonic waves. The sonic...
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6731204 |
Object detection system providing driver information through sound
A vehicle object detection system is disclosed that audibly conveys to the vehicle operator the direction of the detected object relative to the vehicle through the vehicle's audio system. The...
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6703932 |
Intrusion detection and warning system
A warning system comprises a piezo-electric ceramic capable of resonating with an ultrasonic wave having a frequency within a predetermined frequency band and thus outputting an electric signal, a...
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6680688 |
Measuring system and method for detecting object distance by transmitted media with different wave velocities
A measuring system and method of detecting an object distance by transmission media with different wave velocities are described. The measuring system has a computer, a primary detector and a...
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6631096 |
Method and apparatus for detecting intrusion and non-intrusion events
An intrusion detection system that differentiates between a vehicle intrusion event and a non-intrusion event includes transmitter ( 16 ) for transmitting a continuous wave signal that is reflected...
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6617996 |
Ground penetrating radar with audible output
A ground penetrating radar system including a processor for generating audible output signals having discrete frequency components representative of the depth of buried targets. The amplitude of...
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6480144 |
Wireless communication between countermeasure devices
A collision countermeasure system ( 10 ) for an automotive vehicle ( 12 ) is provided. The collision countermeasure system ( 10 ) includes an object detection system ( 14 ) having at least one...
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6466891 |
System for providing an estimate of the location of an undersea object
A system is disclosed that provides. a sonar operator with the most likely range to a target of interest. The system generates and displays a contour based on ship's parameters, target parameters,...
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6462657 |
Intrusion detection apparatus having a virtual capacitor
An apparatus ( 10 ) and a method for detecting an intrusion into an area (e.g., 14 ) are provided. The apparatus ( 10 ) has a transmitter ( 30 ) for transmitting a signal within the area. The...
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6437702 |
Cargo sensing system and method
A method and apparatus for determining whether cargo is present in a freight car. The freight car has a proximal (“rear”) end with a loading door and opposing, distal (“front”) end. One or...
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6433689 |
System for supervision and control of objects or persons
A system for supervision and control of objects or persons within a limited area, such as a building, comprising a plurality of electronic identification chips for placing on respective...
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6396433 |
Talking buried object detector
A spoken word-producing detector identifies objects by comparing signatures of detected objects with stored signatures of known objects. When the signatures compare, the detector produces stored...
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6362749 |
Emergency vehicle detection system
An emergency vehicle detection system for alerting a driver of an approaching emergency vehicle includes a sound signal-producing unit mounted on an emergency vehicle, a sound signal detection unit...
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6335683 |
Signal discriminating method and device for detecting intrusion into premises
The invention concerns a method for discriminating between signals generated by means sensitive to variations in the pressure of a gaseous fluid. This method is characterized in that, in order to...
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6314054 |
Apparatus for detecting objects
An apparatus for detecting labels on a carrier material has a transmitter that emits ultrasonic waves and a receiver that receives ultrasonic waves. The carrier material is located, with the...
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6304179 |
Ultrasonic occupant position sensing system
An occupant position measuring system (10) comprising: a transmitter for generating a pulse modulated transmitter signal; a receiver for receiving a reflection of the transmitter signal, the...
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6282969 |
Optically clear housing and reduced cure time potting compound for use with object sensor
A vehicle exterior object detector apparatus includes a transceiver carried within an optically clear housing and mounted by a holder to a support on the vehicle. A potting compound surrounds the...
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6222191 |
Occupancy sensor
A multiple sensing technology-based occupancy sensor including a unique sensor case assembly and sensor mounting scheme. The result is an occupancy sensor that is adjustable to provide broader...
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6212130 |
Method and apparatus for plural document detection
The presence of overlapped sheets on a paper transport is detected by employing such sheets as an acoustic interference filter. A beam of ultrasonic energy of appropriate frequency, angularly...
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6204767 |
Chair monitor
A chair monitoring system is used in a nursing home, hospital, healthcare facility or home or in a vehicle application, to detect an individual's attempted departure from a seat before the...
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6157293 |
Device for detecting the intrusion of a body in a predetermined space
The device comprises a transmitter (7) transmitting ultrasound into a predetermined space (5), a sensor (8) which senses the echoes from the transmission by the transmitter into the space in order...
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6130610 |
Security system
A self-contained security system is disclosed. Operatively connected to each other within a single housing are a power supply, a motion detector, a device for arming the security system and a...
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6114956 |
Device and method for sensing and protection of persons and objects
An electronic device including a wave transmitter covering a determined spatial sensing field, and a wave receiver for controlling an automatic device; a radiating antenna including a waveguide...
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6040765 |
Obstacle detection system built-in test method and apparatus
An obstacle detection system includes an acoustic piezoelectric transducer capable of radiating and receiving ultrasonic energy. During a BIT transmission period, a controller briefly enables a...
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6011470 |
Ultrasound keyboard protection
An apparatus for protecting a keyboard and includes a sound transformer placed in the keyboard and a sound receiver placed outside the keyboard to receive a signal radiated from the sound...
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5959534 |
Swimming pool alarm
A method and apparatus for detecting unauthorized or accidental entry of an object into a body of water is disclosed, wherein the frequency or frequency range of sound waves in a body of water...
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5920521 |
Ultrasound area surveillance system
An ultrasound area surveillance system has a plurality of ultrasonic transducer units, each of which is designed for directional radiation of an ultrasonic wave field and for the reception of...
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5917776 |
Means for reducing minimum sensing distance of an ultrasonic proximity sensor
A rugged ultrasonic sensor is provided which is capable of detecting objects in very close proximity to the sensor. This close proximity detection includes the detection of objects which are...
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5917775 |
Apparatus for detecting the discharge of a firearm and transmitting an alerting signal to a predetermined location
An apparatus for detecting the discharge of a firearm and transmitting an alerting signal to a predetermined location. The invention provides for detection circuitry having: (1) a microphone for...
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5912625 |
Wave sensor control system
A control system utilizes generated acoustic or electromagnetic waves within a deformable wall wave guide. The wave guide is located in the surveillance area and, upon the wave guide being deformed...
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5894279 |
Emergency vehicle detection system
An emergency vehicle detection system is provided including a first microphone mounted to a front end of a vehicle for receiving audio signals and a second microphone mounted to a rear end of the...
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