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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
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.
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公开(公告)号：CA2240916C
公开(公告)日：2010-04-06
申请号：CA2240916
申请日：1998-06-16
Applicant: INT ROAD DYNAMICS INC
Inventor： BERGAN TERRY , KLASHINSKY ROD
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.
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公开(公告)号：CA2343435C
公开(公告)日：2006-12-05
申请号：CA2343435
申请日：2001-04-06
Applicant: INT ROAD DYNAMICS INC
Inventor： KLASHINSKY ROD , BERGAN TERRY
Abstract: A novel dynamic work zone safety system and method of traffic control for a construction work zone are provided herein. The system includes a first traffic signalling device which is positioned along a roadside immediately upstream of a point where traffic is diverted to a single lane. The first traffic signalling device is defaulted to flash a suitable warning, e.g., "DO NOT PASS" or "MERGE LEFT" or "MERGE RIGHT", thereby to provide a first "NO PASSING" or "MERGE LEFT" or "MER GE RIGHT" zone which is defined by the distance between the first traffic signalling device and the end of the work or construction zone. A second traffic signalling device is positioned alongside a roadside a predetermined distance upstream of the fir st traffic signalling device. The second traffic signalling device defaulted not to fla sh a suitable warning, e. g. , "DO NOT PASS" or "MERGE LEFT" or "MERGE RIGHT" . However, when activated (by processor-controlled means defined herein) to flash a suitable warning, e.g., "DO NOT PASS" or "MERGE LEFT" or "MERGE RIGHT", the second traffic signalling device provides a second suitable zone, e.g., a "D O NOT PASS" or "MERGE LEFT" or "MERGE RIGHT" zone which is contiguous to the fir st "NO PASSING" or "MERGE LEFT" or "MERGE RIGHT" zone. This lengthens the "NO PASSING" or "MERGE LEFT" or "MERGE RIGHT" zone between the second traffic signalling device and the end of the work or construction zone. A plurality of spaced-apart sensors, preferably non-invasive sensors, is disposed along the roadway both downstream of, and upstream of, the second traffic signalling device. These sensors detect and determine the length of a traffic queue upstream of the first traffic signalling device between the first traffic signalling device and the second traffic signalling device, and provides a signal which is representative of the leng th of the traffic queue. The processor receives the traffic queue signal and generates a first activation signal to activate the second traffic signalling device when the traffic queue reaches a predetermined length. It also generates a first deactivation signa l to deactivate the second traffic signal when the traffic queue is less than the predetermined length. This dynamically increases or decreases the "NO PASSING" or "MERGE LEFT" or "MERGE RIGHT" zone.
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公开(公告)号：CA2655995C
公开(公告)日：2015-10-20
申请号：CA2655995
申请日：1998-06-16
Applicant: INT ROAD DYNAMICS INC
Inventor： BERGAN TERRY , KLASHINSKY ROD
Abstract: Traffic monitoring and warning methods are provided herein. The method is for providing traffic volume, line occupancy, per vehicle speed and vehicle classification of vehicles travelling along a highway. The method of one embodiment of the present invention includes the first step of receiving acoustic signals created and radiated by the vehicles as they travel through a detection zone. The method of one embodiment of the present invention includes the second step of signal processing the acoustic signals. By the combination of these two steps, traffic volume, line occupancy, per vehicle speed and classification of vehicles are provided.
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公开(公告)号：CA2358728A1
公开(公告)日：2003-04-12
申请号：CA2358728
申请日：2001-10-12
Applicant: INT ROAD DYNAMICS INC
Inventor： BERGAN TERRY , HANSON RANDY
Abstract: A novel wildlife warning system is provided herein. The system includes one or more vehicle sensors adjacent a roadway to sense an approaching vehicle, and to provide a sensor signal upon sensing the approach. One or more warning alarms which ar e remote from the roadway are configured to generate a wildlife warning signal. One o r more transmitters are remotely connected to the vehicle sensor or sensors for transmitting an actuating signal to the warning alarm or alarms upon reception of the sensed signal, thereby to send a warning to the wildlife. The warning alarms may be chain triggered, or may be controlled by a master controller in a pre-programmed manner.
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Patent Agency Ranking
公开(公告)号：CA2122684C
公开(公告)日：1999-04-06
申请号：CA2122684
申请日：1994-05-02
Applicant: INT ROAD DYNAMICS INC
Inventor： TAYLOR BRIAN , BERGAN TERRY
Abstract: A sensor array system is provided for determining both the number of axles on a vehicle travelling along the roadway and the distance between an axle and an immediately adjacent axle. The sensor array system includes a first group of axl e sensors comprising at least one pair of spaced-apart axle sensors which directly sense axles, the distance between adjacent spaced-apart axle sensors in the first grou p of axle sensors being distance "a". The sensor array further includes a second group of axle sensors comprising a second set of axle sensors which includes at least three ax le sensors which directly sense axles which are more closely spaced apart by a distance "d" which is less than the distance "a" between adjacent axle sensors of the first group o f axle sensors. The span between a first axle sensor of the second group of axle sensor s and a last axle sensor of the second group of axle sensors is distance "b". The span between a first axle sensor in the first group of axle sensors and a last axle sensor in the second group of axle sensors is distance "c". The distance "c" must be greater than, or equal to, the largest unknown axle spacing to be measured on the vehicle. The distance "b" must be greater than, or equal to, distance "a". Finally, the spacing "d" must b e such that any axle of the vehicle must trigger at least one axle sensor. The system o perates independently of the speed of the vehicle.
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公开(公告)号：CA2134717C
公开(公告)日：1999-02-23
申请号：CA2134717
申请日：1994-10-31
Applicant: INT ROAD DYNAMICS INC
Inventor： KLASHINSKY ROD , BERGAN TERRY
Abstract: Traffic monitoring systems which are provided herein include a set of sensors which is disposed in a traffic lane approaching a hazard for providing signals w hich are indicative of the speed, and which are also indicative of at least the weight of a vehicle traversing those set of sensors. A processor has a memory for storing site-speci fic dimensional data related both to the hazard and to signals received from the set of sensors. A traffic signalling device is associated with the traffic lane and is disposed downstream of the set of sensors. The processor, which controls the traffic sign alling device, is responsive to the signals from the set of sensors for computing an ac tual vehicle speed and a computed maximum vehicle speed, which is derived from the si te-specific dimensional data, and also from at least the weight of the vehicle. That speed is the maximum speed for that particular vehicle safely to negotiate that partic ular hazard. The processor operates the traffic signalling device if the computed act ual vehicle speed exceeds the computed maximum vehicle speed. One embodiment is loca ted before a steep downgrade and computes a safe descent speed for a vehicle to desc end the downgrade and displays the safe speed on a roadside sign. Another embodiment is located before a curve, e.g., a highway exit ramp, and uses ramp data together w ith vehicle weight, height and class of vehicle information to predict whether the v ehicle will exceed a threshold speed for that vehicle to negotiate that curve without rollov er. A third embodiment is located on a steep downgrade approaching a traffic signal co ntrolled intersection and computes whether the vehicle is a "runaway" which cannot stop a t the intersection if necessary. In that case the system pre-empts the traffic signal to ensure that the vehicle has right of way through the intersection.
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公开(公告)号：CA2656134C
公开(公告)日：2014-12-23
申请号：CA2656134
申请日：1998-06-16
Applicant: INT ROAD DYNAMICS INC
Inventor： BERGAN TERRY , KLASHINSKY ROD
Abstract: A method is provided herein for detecting trucks moving through a predetermined zone The method includes the comprising the steps of mounting a plurality of above-road electro-acoustic sensor arrays over a predetermined zone of the road. Then electrical signals from said plurality of above-road electro- acoustic sensor arrays are filtered. At least two of the filtered electrical signals are correlated with one another. The results of that correlation i.e., in the immediately-preceding step are integrated over time. Those integrated result of that immediately-preceding step are compared to a predetermined threshold, thereby indicating detection of a motor vehicle when the threshold is exceeded by said integrated result. Then, if said threshold is exceeded by said integrated result, said integrated result is compared to electrical signals from known trucks to determine whether said motor vehicle is a truck.
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公开(公告)号：CA2656141C
公开(公告)日：2012-02-07
申请号：CA2656141
申请日：1998-06-16
Applicant: INT ROAD DYNAMICS INC
Inventor： BERGAN TERRY , KLASHINSKY ROD
Abstract: Traffic monitoring and warning methods are provided herein. This invention provides a method of automatically controlling the operation of a traffic-signalling device at an intersection by analyzing data from a specific traffic monitoring and warning system as particularly described in the present specification. The present method comprising the steps of: downloading, into the processor, a set of records including stopping threshold and the speed of a truck which is derived from at least a first set of above-road electro-acoustic sensor arrays which are disposed upstream of intersection; downloading, into the processor, a set of records of a computed speed of the truck downstream from the first set of above-road electro-acoustic sensor arrays but a pre-measured distance upstream of the intersection; matching records, by the processor, of the two speeds of the truck from both the sets of records; computing, by the processor, and from the sets of records, an actual speed of the truck and a computed maximum stopping distance to enable the truck from to stop from the stopping threshold data which had been downloaded into the processor; downloading, into the processor, the actual speed of the truck at a pre- measured distance upstream from intersection; determining, by the processor, whether the truck will be able to stop before the intersection; and from the determination, then sending, by the processor, a signal to the traffic-signalling device to operate the traffic- signalling device to enable the truck to cross the intersection, and to discontinue operating the traffic signalling device when the truck crosses the intersection.
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公开(公告)号：CA2240916A1
公开(公告)日：1999-11-15
申请号：CA2240916
申请日：1998-06-16
Applicant: INT ROAD DYNAMICS INC
Inventor： BERGAN TERRY , KLASHINSKY ROD
Abstract: Traffic monitoring and warning systems and vehicle ramp advisory systems are provided herein. Such system include at least one set of sensor arrays comprising a set of above-road electro-acoustic sensor arrays which are 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 at least one set of above-road sensor arrays. A traffic signalling device is associated with the traffic lane and is disposed downstream of the at least one set of sensor arrays, the traffic signalling device being controlled by the processor. The processor is responsive to the signals from the at least one set of 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 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 speed of the truck being a maximum 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.
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