Abstract: At least one waveform characteristic of a vehicular sensor waveform is reported in a wireless vehicular sensor network. The vehicular sensor waveform results a vehicle's presence near a wireless vehicular sensor node. The waveform characteristic may be rising edge, falling edge, waveform duration and/or waveform midpoint of vehicular sensor waveform. Report transmission uses at least one wireless physical transport. Transmitting the report may initiate a response across the wireless physical transport, preferably from an access point, an acknowledgement of receiving the report. The transmitted report may be received by an access point in the wireless vehicular sensor network. The wireless vehicular sensor network may create any of a vehicular traffic report, a vehicular parking report, and/or a vehicular speeding report, based upon the received vehicular sensor waveform report.
Abstract: A roadway information system is disclosed with components generating and using vehicle signatures for vehicles passing near sensor pods located on or near lanes. These components in turn are part of and/or communicate with means and/or processors for generating an/or using Vehicle Movement Estimates based upon the vehicle signatures. The VME are used to create traffic feedback that may be presented to programmable field devices that may present at least some of the traffic feedback to drivers of the vehicles, thereby optimizing the fuel usage and travel time of the roadway.
Abstract: A roadway information system is disclosed with components generating and using vehicle signatures for vehicles passing near sensor pods located on or near lanes in a multiple input-output roadway node. Means and/or processors for matching incoming and outgoing vehicle signatures are disclosed creating an in-out vehicle match table used to generate a vehicle movement estimate or its components including a travel time and/or vehicle count that may be created and/or used in response to a match tally exceeding a threshold or the stimulation of a timing signal.
Type:
Application
Filed:
July 20, 2009
Publication date:
January 21, 2010
Applicant:
Sensys Networks, Inc.
Inventors:
Karric Kwong, Robert Kavaler, Pravin Varaiya, Ram Rajagopal
Abstract: A roadway information system is disclosed with components generating and using vehicle signatures for vehicles passing near sensor pods located on or near lanes. Means and/or processors for matching incoming and outgoing vehicle signatures are disclosed creating an in-out vehicle match table used to generate a vehicle movement estimate or its components including a travel time and/or vehicle count.
Type:
Application
Filed:
July 20, 2009
Publication date:
January 21, 2010
Applicant:
Sensys Networks, Inc.
Inventors:
Karric Kwong, Robert Kavaler, Ram Rajagopal, Pravin Varaiya
Abstract: Method using raw signal from magneto-resistive sensor through the use of recent variance (RV) of raw signal (RS) for first-capture of first time RV crosses variance detect, second-capture start enable for first time when RS crosses above raw detect and RV above variance detect, third-capture ending time when RS crosses below raw undetect and RV below variance undetect. Starting and ending times are products of the process, often used for traffic flow counts. Apparatus supporting this method as a processor and/or a vehicular sensor node.
Abstract: Vehicular sensor node, circuit apparatus and their operations are provided. Power from a power source is controlled for delivery to radio transceiver and magnetic sensor, based upon a task trigger and task identifier. The radio transceiver and the magnetic sensor are operated based upon the task identifier, when the task trigger is active. The power source, radio transceiver, magnetic sensor, and circuit apparatus are enclosed in vehicular sensor node, placed upon pavement and operating for at least five years without replacing the power source components. Magnetic sensor preferably uses the magnetic resistive effect to create magnetic sensor state. Radio transceiver preferably implements version of a wireless communications protocol. The circuit apparatus may further include light emitting structure to visibly communicate during installation and/or testing, and second light emitting structure used to visibly communicate with vehicle operators.
Abstract: The invention includes using multiple wireless vehicular sensor nodes to wirelessly receive multiple, time-interleaved vehicular waveform reports from the nodes. Each vehicular waveform report approximates a raw vehicular sensor waveform observed by a magnetic sensor at the node based upon the presence of a vehicle. The vehicular waveform reports are products of this wirelessly receiving process. The invention includes apparatus supporting the above outlined process. The vehicular waveform reports may be time synchronized.
Abstract: Wireless Vehicular Sensor Node (WVSN) gating radio transmission of a message of the vehicle sensor state of a magnetic sensor by a vehicle-present indication. WVSN may further include ambient sensor generating and transmitting an ambient report. Alternatively, WVSN includes magnetic sensor and ambient sensor used to create messages for radio trasnmission. Method and apparatus for wireless receiving multiple ambient reports from multiple WVSN to create road condition report. The received ambient reports and the road condition report are product of this process. The wireless vehicular sensor network including at least two WVSN sending ambient reports.
Abstract: The invention includes using multiple wireless vehicular sensor nodes to wirelessly receive multiple, time-synchronized vehicular waveform reports from the nodes to create a time synchronized system report, and preferably a time synchronized vehicular report. Each vehicular waveform report approximates a raw vehicular sensor waveform observed by a magnetic sensor at the node based upon the presence of a vehicle. The vehicular waveform reports, the time-synchronized system report, and the time synchronized vehicular report are products of this wirelessly receiving process. The invention includes apparatus supporting the above outlined process. Reception of the vehicular waveform reports may be time interleaved.