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    METHOD FOR DETECTING AND SIGNALLING TRUCK PRESENCE
    15.
    发明专利
    METHOD FOR DETECTING AND SIGNALLING TRUCK PRESENCE 未知

    公开(公告)号：CA2656132C

    公开(公告)日：2012-10-02

    申请号：CA2656132

    申请日：1998-06-16

    Applicant: INT ROAD DYNAMICS INC

    Inventor： BERGAN TERRY ,  KLASHINSKY ROD

    IPC: G08G1/01 ,  G08G1/07

    Abstract: A traffic monitoring and warning method is provided herein. The method is used for detecting and signalling the presence of a truck in a predetermined zone, and of determining the speed of the truck. The method includes the steps of: (i) receiving, with a first above-road electro-acoustic sensor array, a first acoustic signal which is radiated from a motor vehicle and converting the first acoustic signal into a first electric signal that represents the first acoustic signal; (ii) receiving, with a second above- road electro-acoustic sensor array, a second acoustic signal which is radiated from the motor vehicle and converting the second acoustic signal into a second electric signal that represents the second acoustic signal; (iii) creating, with spatial discrimination circuitry, a third electric signal, which is based on the sum of the first electric signal and the second electric signal such that the third signal is indicative of the acoustic energy emanating from the detection zone; (iv) creating, with interface circuitry, a binary loop relay signal which is based on the third electric signal such that the loop relay signal is asserted when the motor vehicle is within the detection zone and such that the loop relay signal is retracted when the motor vehicle truck is not within the detection zone; and (v) comparing the third electric signal to electrical signals from known trucks to determine whether the motor vehicle is a truck, and to compute the speed of the truck if the motor vehicle is determined to be a truck.

    MEASUREMENT OF WHEEL AND/OR AXLE LOAD OF ROAD VEHICLES
    16.
    发明专利
    MEASUREMENT OF WHEEL AND/OR AXLE LOAD OF ROAD VEHICLES 未知

    公开(公告)号：CA2644875A1

    公开(公告)日：2010-05-25

    申请号：CA2644875

    申请日：2008-11-25

    Applicant: INT ROAD DYNAMICS INC

    Inventor： BERGAN TERRANCE ARTHUR ,  HANSON RANDAL LEROY

    IPC: G01G19/03 ,  G01G3/14 ,  G01G3/142

    Abstract: The present invention provides an improved weigh-in-motion scale. A slight increase in the thickness of a an upper, flexibly-deformable metal plate e.g., having a thickness of about 0.604 inches to about 0.756 inches in a thin, flexibly-deformable plate system coupled with a change in the transverse locations of the load cells each of the strain gauge channels is spaced e.g., by an amount of about 52 % to about 54 % of the distance from the center line of the bottom or lower metal plate to the respective longitudinal edge of the bottom or lower metal plate, provides the improved weigh-in-motion scale, which is capable of weighing substantially heavier loads than previously known weigh-in-motion scales. In use, as weight is applied to the wcigh-in-motion scale, the upper flexibly-deformable metal plate elastically bends. The strain gauges thus provide a changing resistive value proportional to the bending of the flexible element and the weight applied, to generate signals to the Wheatstone bridge circuit, which then provides output signals from the Wheatstone bridge circuit, which are proportional to the force applied to the upper flexibly-deformable metal plate.

    MID-BLOCK TRAFFIC DETECTION AND SIGNAL CONTROL
    17.
    发明专利
    MID-BLOCK TRAFFIC DETECTION AND SIGNAL CONTROL 未知

    公开(公告)号：CA2655457A1

    公开(公告)日：2009-10-16

    申请号：CA2655457

    申请日：2009-02-24

    Applicant: INT ROAD DYNAMICS INC

    Inventor： BUSHMAN ROBERT J

    IPC: G08G1/01 ,  G08G1/07

    Abstract: A method and system for a mid-block traffic detection and traffic signal control system is provided herein that is suited to monitoring heavy commercial vehicles such as trucks is provided. The method comprises detecting a vehicle and determining at least one pre-determined parameter of the vehicle. A traffic condition is evaluated based on the at least one pre-determined parameter. I n response to the evaluation of the traffic condition, a traffic signal is controlled.

    METHOD FOR DETECTING AND SIGNALLING TRUCK PRESENCE
    18.
    发明专利
    METHOD FOR DETECTING AND SIGNALLING TRUCK PRESENCE 未知

    公开(公告)号：CA2656132A1

    公开(公告)日：1999-11-15

    申请号：CA2656132

    申请日：1998-06-16

    Applicant: INT ROAD DYNAMICS INC

    Inventor： BERGAN TERRANCE ARTHUR ,  KLASHINSKY ROD

    IPC: G08G1/01 ,  G08G1/07

    Abstract: Traffic monitoring and warning systems and vehicle ramp advisory systems are provided herein. Such system includes a set of sensor arrays comprising a set of above-road electro-acoustic sensor arrays which is disposed above a traffic lane approaching a hazard for producing signals which are indicative of whether the vehicle is an automobile or a truck and, if it is a truck, to record the presence of such truck, and to provide signals which are indicative of the speed of such truck. A processor is provided which has a memory for storing site-specific data related both to the geometry of the hazard and to signals which have been received from the set of above-road electro-acoustic sensor arrays. A traffic signalling device is associated with the traffic lane and is disposed downstream of the set of above-road electro-acoustic sensor arrays, the traffic signalling device being controlled by the processor. The processor is responsive to the signals from the set of above-road electro-acoustic sensor arrays for computing an actual speed of the truck and for computing a computed maximum safe speed for such truck at the hazard. The computed maximum safe speed of the truck is derived from the site-specific dimensional data of the hazard and from at least the initial speed of the truck, the computed maximum safe speed of the truck being a maximum safe speed for that truck safely to negotiate the hazard. The processor compares the computed actual speed of the truck with the computed maximum safe speed for the truck. Then, the processor automatically operates the traffic signalling device if the computed actual speed of the truck exceeds the computed maximum safe speed for the truck. The processor also discontinues operating the traffic signalling device if the computed actual speed of the truck no longer exceeds the computed maximum safe speed for the truck.

    SEALED LOAD CELL CONSTRUCTION
    19.
    发明专利
    SEALED LOAD CELL CONSTRUCTION 未知

    公开(公告)号：CA1126767A

    公开(公告)日：1982-06-29

    申请号：CA345733

    申请日：1980-02-15

    Applicant: INT ROAD DYNAMICS INC

    Inventor： DYCK GERHARD J

    IPC: G01G5/00

    Abstract: A load measuring device is provided herein which operates with a small amount of vertical travel. The load measuring device includes a base with a thin reservoir for load-transmitting material in the form of a non-compressible fluid (e.g., oil) forming the lower portion of the base. A flexible diaphragm is provided which is in direct contact with the load-transmitting material in the reservoir. A platform is provided for applying a load to the diaphragm. Finally, a transducer including an integral diaphragm at its base is held with such integral diaphragm in direct contact with the flexible diaphragm to provide a reading which is proportional to the absolute value of the load. The invention thus provides a sealed, shockproof load cell whose manufacture is greatly simplified and whose cost is reduced both in terms of time and material. Moreover, its installation in a weigh scale is much simplified since there is no hydraulic connection needed between the load cell and the transducer.

    SYSTEM AND METHOD FOR MEASURING MOVING VEHICLE INFORMATION USING ELECTRICAL TIME DOMAIN REFLECTOMETRY
    20.
    发明专利
    SYSTEM AND METHOD FOR MEASURING MOVING VEHICLE INFORMATION USING ELECTRICAL TIME DOMAIN REFLECTOMETRY 未知

    公开(公告)号：MY179993A

    公开(公告)日：2020-11-19

    申请号：MYPI2015702801

    申请日：2014-03-03

    Applicant: INT ROAD DYNAMICS INC

    Inventor： MEIER IAN ROBERT ,  HANSON RANDAL LEROY ,  LOCKERBIE MICHAEL DAVID ,  HAICHERT TYLER WILLIAM

    Abstract: Systems, apparatus and methods are provided for measuring moving vehicle information. Moving vehicle information may be measured by a sensor (12) configured to respond to one or more wheels of the vehicle, where one or more of the wheels changes the characteristic impedance of the sensor (12) at the wheel's contact location. An electrical time domain reflectometry signal processing system which is capable of measuring the change in the impedance of the sensor (12) and converting the impedance change to a signal may be connected operatively to the sensor (12). A data-processing system receives the signal and extracts the vehicle information therefrom. The most suitable drawing: FIGURE 1a.

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