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Document Title |
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7564468 |
Method and system for presenting an image of an external view in a moving vehicle
Methods and systems for processing images corresponding to views external to a vehicle are disclosed. A system in accordance with one embodiment of the invention includes first and second signal...
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7486201 |
Combined personalized traffic and weather report and alert system and method
A system and method for generating and delivering to users combined personalized traffic and weather report and alerts including forecast traffic and weather conditions. A user defines a travel...
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7221289 |
System and method for operating a loop detector
The temperature of an operator circuit is measured. A relationship between the temperature of the operator circuit and characteristics of the operator circuit is determined. The relationship is...
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7149327 |
Image processing apparatus and method
Image processing apparatus transforms an input image from a first camera by using a parameter of affine transformation based on a position of a second camera. The first camera and the second camera...
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7132959 |
Non-interfering vehicle detection
A technique for operating a vehicle detection system involves obtaining samples randomly from a detector of the vehicle detection system and determining the presence of a vehicle in response to the...
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7026955 |
Apparatus and method for activating an inductance loop vehicle detection system
An apparatus and method for activating an inductance loop vehicle detection system is disclosed, wherein a magnet is attached to a vehicle. In order to activate the inductance loop vehicle...
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6577952 |
Position and heading error-correction method and apparatus for vehicle navigation systems
The present invention solves the problems of the prior art by providing methods for compensating for temperature-dependent drift of bias in a vehicle heading sensor of a dead reckoning vehicle...
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6538579 |
Moving object detection method and apparatus
A moving object detection method and apparatus is proposed in which a plurality of heads are installed above a detection line traversing a road, their outputs undergo A/D conversion and binary...
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6345228 |
Road vehicle sensing apparatus and signal processing apparatus therefor
A road vehicle sensor provides an output signal having a magnitude which varies with time through a plurality of values as a vehicle passes the sensor. Signal processing apparatus monitors the...
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6097312 |
Method and apparatus for detecting magnetostrictive resonator and traffic system
While transmitting an electromagnetic wave from a transmitting antenna to, for example, a magnetostrictive resonator, buried in a road, a reception section composed of a reception amplifier and...
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5936551 |
Vehicle detector with improved reference tracking
A vehicle detector with improved reference tracking routines in both the Call direction and the No Call direction. Call direction tracking includes rate sensitive tracking in which the reference is...
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5850192 |
Apparatus for sensing vehicles
An underground vehicle sensing system extends below a vehicle travel surface to detect the presence of a vehicle. A conduit extends substantially horizontally underground from an access hole placed...
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5734338 |
Vehicle detector with automatic sensitivity adjustment
The period T nv of an oscillator signal is measured. A number N meas of cycles of the oscillator signal is determined based upon the measured oscillator period T nv and upon a desired minimum...
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5729214 |
Condition reactive display medium
Digitally-effectuated, automatic control over the message or messages displayed on one or more programmable display mediums in response to changing conditions, or anticipated changing conditions,...
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5710558 |
Traffic sensor for roadway placement
A traffic sensor for dispostion across a lane or lanes of a roadway includes a pliable strip within which is housed a flexible carrier which in turn supports electrical sensors and coaxial cables....
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5652577 |
Device and method for passively activating inductive loop sensor
A device and method for passively activating an inductive loop vehicle sensor. The sensor has an inductive loop in a roadway that produces an electro-magnetic field and utilizes the changes caused...
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5523753 |
Vehicle detector system with periodic source filtering
A detector system filters the effects of periodic noise such as magnetic flux from nearby power lines or other periodic sources. The detector system further adapts in the case that the system...
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5512891 |
Drive-up station vehicle detection system and method of using same
A method and apparatus for detecting objects disposed in close proximity to a conductive loop, includes the use of a sensitivity selection circuit to compensate for loop sensitivity to metal and...
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5491475 |
Magnetometer vehicle detector
A magnetometer vehicle detector for detecting various parameters of traffic on a roadway. A number of sensors, having a compact package, along with connecting cables, may be placed in road way with...
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5396234 |
Validation checking in traffic monitoring equipment
Traffic monitoring equipment including traffic speed measuring equipment has a signal validation facility incorporated to enhance reliability of the equipment. This facility permits the monitoring...
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5361064 |
Vehicle detector with power main noise compensation
A vehicle detector includes an inductive sensor which is driven by an oscillator to produce an oscillator signal having a frequency which is a function of inductance of the inductive sensor....
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5337039 |
Proximity detection system with digital frequency variation detection means
An oscillator which produces a continuous wave output signal on an antenna having a preset frequency. A detection circuit detects changes in the preset frequency resulting from proximity between...
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5296852 |
Method and apparatus for monitoring traffic flow
A vision processing apparatus and method for detecting and monitoring traffic flow. The method includes the steps of generating successive images of a section of roadway; transducing the successive...
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5245334 |
Traffic detection cable installations
An installation of traffic detection cables adapted for sub-surface mounting or adapted for top surface mounting which comprises a moulding of prismatic type, that is having the substantially same...
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5175529 |
Fast event detector
A fast acting sensing circuit for use in a warning system to indicate relative movement between an object and a sensor when the movement exceeds a predetermined rate of speed. The circuit only...
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5028921 |
Vehicle detector method and system
A method of updating the reference count in a period shift measurement vehicle detector permits conditional reference count updating in the No Call direction whenever the sample count minus...
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5008666 |
Traffic measurement equipment
Traffic measurement equipment has a pair of coaxial cables having barium titanate piezo-electric responsive crystals embedded in the polymer together with a vehicle presence detector to indicate...
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4920340 |
Vehicle detecting method and system which can communicate with vehicles
A vehicle detecting system detects the existence of a vehicle on a roadway and communicates therewith in the following manner. A pair of transmitting and receiving coils are arranged on both sides...
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4862162 |
Environmental tracking in inductance loop vehicle detection systems
In a vehicle presence detection system in which an inductive sensor loop is the frequency-determining element of the tuned circuit of a loop oscillator, discrimination against variations in...
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4568937 |
Induction loop vehicle detector
An induction loop vehicle detector comprises an oscillator circuit having a plurality of capacitors switchable in circuit with a road loop under the control of a microcomputer to determine the...
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4491841 |
Self-adjusting inductive object-presence detector
A vehicle detector has an inductive sensing loop that is a frequency determining element of an oscillator. A first counter is operated to sample the oscillator frequency or period and the count...
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4472706 |
Vehicle presence loop detector
A vehicle presence detection system capable of detecting multiple entry and exiting comprising an electrical signal generating system comprising a tuned circuit having a magnetic field-producing...
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4358749 |
Object detection
In a vehicle detector installation employing an inductive sensing loop that is a frequency determining element of an oscillator, the oscillator is provided with a voltage controlled capacitor as...
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4296401 |
Inductive vehicle detector
An electronic vehicle detection installation of the type using a detector loop laid in the roadway senses changes in the inductive time constant of the loop. The changes are sensed by determining...
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4258351 |
System for collection and transmission of road traffic information
The system for collection and transmission of road traffic information comprises a lens system installed on a tall structure such as on the roof of a building and angled vertically or diagonally to...
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4075563 |
Digital loop detector with improved detection control
An improvement in a digital device for detecting a metal object in the field of influence of an oscillator controlling loop, which digital device includes counter means for counting pulses during a...
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3989932 |
Inductive loop vehicle detector
Apparatus for use in combination with an inductive loop for detecting metal objects, e.g. vehicles, in the immediate vicinity of said loop. The loop may, for example, be a coil of wire buried in a...
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3944912 |
Magnetic detection means for sensing mobile ferromagnetic masses including pulse shaper circuit for generating a single pulse output
A device for detecting mobile ferromagnetic masses, notably of vehicles, comprising a magnetometric pick-up element of the type with orthogonal fields. The pick-up element is a ferrite tube of...
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3943339 |
Inductive loop detector system
Apparatus for use in combination with multiple inductive loops for detecting metal objects, e.g. vehicles, in the immediate vicinity of each of said loops. Each loop may, for example, be a coil of...
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3875555 |
Vehicle detection system
An improved magnetic inductance vehicle detection system is provided which responds to changes in the inductance of a wire loop embedded in the roadway to sense the presence of a vehicle. The...
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3875525 |
Digital automatic oscillator tuning circuit
A railroad train moving along an approach to a grade crossing (or other location of interest) is detected by apparatus that is responsive to the change in effective track inductance caused by the...
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3873964 |
Vehicle detection
A digital vehicle detection system is provided which responds to changes in the inductance of a wire loop embedded in the roadway to sense the presence of a vehicle. The loop and associated lead-in...
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3870990 |
VEHICLE PRESENCE DETECTOR
A vehicle presence detector is disclosed using a detector loop made to resonate at a harmonic of the oscillator driving frequency. A phase detection apparatus is included capable of detecting...
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3868626 |
Digital loop detector system
A digital detecting system for creating an output signal when an electrically conductive object, such as a vehicle, comes within the field of effect of a loop. The system includes means for...
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3863206 |
Digital Vehicle Detector
A vehicle detection and traffic control system employing a plurality of detection loops at different locations, such as adjacent a roadway or street intersection, or the like, each controlling the...
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3838270 |
DIGITAL MOTION DETECTOR
A railroad train moving along an approach to a grade crossing (or other location of interest) is detected by apparatus that is responsive to the change in effective track inductance caused by the...
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3820100 |
PRESENCE DETECTOR HAVING AUTOMATIC DIGITAL TUNING
Apparatus for determining whether a movable body, such as a railway car traveling along a track, is present in a preselected zone of interest along its path of travel. In railway applications for...
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3775742 |
VEHICLE DETECTION SYSTEM
A system for detecting vehicles and suitable for use in conjunction with other equipment for traffic monitoring and control. The system includes one or more sensors capable of measuring and...
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3685013 |
SELF-ADJUSTING VEHICLE DETECTOR SYSTEM
In this vehicle detector system a fixed frequency oscillatory signal produced by a voltage controlled, fixed frequency oscillatory signal source is passed to an untuned circuit including an...
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3675195 |
APPARATUS FOR DETECTING TRAFFIC INFORMATION
Apparatus for detecting traffic information employs as a vehicle detector a composite inductance loop laid on a road of which traffic information is to be detected. The composite loop consists of a...
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