The invention relates to a WIM sensor for detecting loads of vehicles on a roadway segment when a wheel of a vehicle crosses the WIM sensor arranged flush with the roadway surface in the roadway segment. The WIM sensor is formed as an elongated profile along a longitudinal axis and defines a space therein. A force sensor configured to generate a force sensor signal corresponding to a dynamic ground reaction force when the wheel crosses the force sensor is arranged in the space. An electro-acoustic transducer is arranged in the space and configured to measure sound waves and accordingly generate a transducer signal.

A Weigh-In-Motion force transducer includes a housing profile and a piezoelectric measuring arrangement that generates electric polarization charges from a reaction force acting along a force introduction axis via the housing profile, which includes a tubular part internally defining a cavity containing the piezoelectric measuring arrangement under mechanical prestress along the force introduction axis. The tubular par is configured to be expanded along the force introduction axis by a mounting force acting along a mounting force axis and applied to the tubular part. The configuration of the tubular part in a cross-sectional plane defined by the force introduction axis and the mounting force axis is elliptical in shape with a major semiaxis extending along the mounting force axis and a minor semiaxis extending along the force introduction axis.

Systems, apparatus and methods are provided for measuring moving vehicle information. Moving vehicle information may be measured by a sensor configured to respond to one or more wheels of the moving vehicle, where one or more of the wheels change the characteristic impedance of the sensor 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 and converting the impedance change to a signal may be connected operatively to the sensor. A data-processing system receives the signal and extracts the moving vehicle information therefrom.

A WIM sensor for determining wheel loads of a vehicle on a roadway segment during the passage of a wheel of the vehicle includes an elongated hollow profile that defines an enclosed first space. A plurality of piezoelectric measuring elements are disposed within the first space. A support element is arranged in the first space and secures therein the plurality of piezoelectric measuring elements. An electronic element is arranged in the first space and secured by the support element. An electric charge conductor is disposed in the first space and electrically connects a force-receiving surface of a piezoelectric measuring element to the electronic element.

The present invention relates to a device for determining a weight of a vehicle, the device being configured to: obtain a set of weights derived from in-motion weighing of the vehicle on a weighing bridge, wherein each weight in the set of weights represents one or more axle weights of the vehicle; select one or more weights in the set of weights such that the one or more selected weights together represent all axles of the vehicle and each axle of the vehicle is only represented once; determine a total weight of the vehicle based on the one or more selected weights. Furthermore, the invention also relates to a system and corresponding methods.

An apparatus includes a sensor assembly. The sensor assembly includes a transmission-line assembly having an electrical transmission-line parameter configured to change, at least in part, in response to reception, at least in part, of a vehicular load of a moving vehicle moving relative to a vehicular roadway to the transmission-line assembly positionable, at least in part, relative to the vehicular roadway.

The invention is a monitoring system for determining a vehicle safety setting based on weight. The system includes a monitoring station, a weight determination system, a data input device configured to receive input data, and a processing device. The processing devices includes a processor and non-volatile memory. The processor is configured to receive load ratings for a tow vehicle and tow equipment, receive weight data from the weight determination system, and receive the input data from the data input device. The processor is also configured to determine at least one safety setting based on the load ratings, the weight data, and the input data, send the safety setting data to the monitoring system, and communicate the safety setting to a user.

Systems, apparatus and methods are provided for measuring moving vehicle information. Moving vehicle information may be measured by a sensor configured to respond to one or more wheels of the moving vehicle, where one or more of the wheels change the characteristic impedance of the sensor 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 and converting the impedance change to a signal may be connected operatively to the sensor. A data-processing system receives the signal and extracts the moving vehicle information therefrom.

A weigh-in-motion system includes a base, a load cell assembly supporting a leading edge of a platform structure movable with respect to the base, and a load cell assembly supporting a trailing edge of the platform. A processor is configured to execute program instructions in a memory to obtain load profile data generated by the load cells and to determine a weight associated with a vehicle using the load profile data. The processor is further configured to execute the program instructions to generate an output based upon the determined weight.

An apparatus includes a sensor assembly. The sensor assembly includes a transmission-line assembly having an electrical transmission-line parameter configured to change, at least in part, in response to reception, at least in part, of a vehicular load of a moving vehicle moving relative to a vehicular roadway to the transmission-line assembly positionable, at least in part, relative to the vehicular roadway.