公开(公告)号：US5440232A

公开(公告)日：1995-08-08

申请号：US186711

申请日：1993-12-06

申请人： John F. Scarzello ,  Adam C. Feaga ,  Daniel S. Lenko

发明人： John F. Scarzello ,  Adam C. Feaga ,  Daniel S. Lenko

IPC分类号： G01R29/08 ,  G01R33/02

CPC分类号： G01R29/0857

摘要： A portable electromagnetic field exposure dosimeter includes a triaxial fite-loaded coil sensor, a group of amplifiers and bandpass filters, a data control board, and a computer. The triaxial sensor receives electromagnetic radiation along three orthogonal axes for measurement which is channelled through a group of amplifiers and then bandpass filtered into three frequency signal ranges. One frequency range corresponds to exposure at 60 Hz and two of its harmonics. The second frequency range corresponds to high frequency pulsed energy. The third frequency range reflects body motion of a tested individual. The data control board converts such filtered signals into digital code and controls the flow of the converted data to random access memory and to the computer. The computer performs a Fast Fourier Transform on the converted data from the 60 Hz frequency range and then stores or displays the analyzed data as a function of frequency and time. The computer also stores or displays the data from the other two frequency ranges.

摘要翻译： 便携式电磁场曝光剂量计包括三轴铁氧体负载线圈传感器，一组放大器和带通滤波器，数据控制板和计算机。 三轴传感器沿着三个正交轴测量接收电磁辐射，通过一组放大器，然后带通滤波成三个频率信号范围。 一个频率范围对应于在60Hz和两个谐波的曝光。 第二频率范围对应于高频脉冲能量。 第三个频率范围反映了测试个体的身体运动。 数据控制板将这些经滤波的信号转换为数字代码，并将转换的数据的流程控制为随机存取存储器和计算机。 计算机对来自60Hz频率范围的转换数据执行快速傅里叶变换，然后存储或显示分析数据作为频率和时间的函数。 计算机还存储或显示来自其他两个频率范围的数据。

公开(公告)号：US06208268B1

公开(公告)日：2001-03-27

申请号：US08054166

申请日：1993-04-30

申请人： John F Scarzello ,  Daniel S. Lenko ,  Adam C. Feaga

发明人： John F Scarzello ,  Daniel S. Lenko ,  Adam C. Feaga

IPC分类号： G08G101

CPC分类号： G08G1/042 ,  G08G1/052

摘要： An improved detector is provided for installation in a roadway surface. The detector finds utility in a highway vehicle detection system for determining vehicle presence, vehicle speed and vehicle length. First and second matched induction coil magnetic sensors are maintained at or near the roadway surface. Each of the sensors has a longitudinal axis aligned normal to the roadway surface. The first and second sensors are separated from one another by a known distance in a direction substantially aligned with a direction of traffic flow. Each of the sensors generate a differential magnetic field signature with respect to time to indicate a passing vehicle's leading and trailing edge magnetic signatures. Vehicle speed is determined by a time-distance relationship using the leading and trailing edge magnetic signatures and the known distance. Vehicle length is determined by a time-speed relationship using the leading and trailing edge magnetic signatures and the determined vehicle speed. A triaxial magnetometer maintained at a location in close proximity to the first and second sensors measures a DC magnetic field. The DC magnetic field has vertical and horizontal magnetic field components with the horizontal components including a component substantially aligned with the direction of traffic flow and a component substantially perpendicular to the direction of traffic flow. The vertical and horizontal components caused by the passing vehicle are used to determine vehicle presence. An ELF communications system may be incorporated with the detector to link roadside and vehicle transmitted/received information.

摘要翻译： 提供改进的检测器用于安装在道路表面中。 检测器在公路车辆检测系统中可用于确定车辆存在，车辆速度和车辆长度。 第一和第二匹配的感应线圈磁传感器保持在道路表面处或附近。 每个传感器具有与道路表面正交对准的纵向轴线。 第一和第二传感器在基本上与交通流的方向对齐的方向上彼此隔开已知的距离。 每个传感器相对于时间产生差分磁场签名，以指示经过的车辆的前缘和后缘磁性签名。 车速由使用前后磁性签名和已知距离的时间距离关系确定。 车辆长度由使用前后缘磁性签名和所确定的车辆速度的时间速度关系确定。 维持在靠近第一和第二传感器的位置处的三轴磁力计测量直流磁场。 直流磁场具有垂直和水平的磁场分量，水平分量包括基本上与交通流的方向对齐的分量和基本上垂直于交通流的方向的分量。 由过往车辆引起的垂直和水平部件用于确定车辆存在。 ELF通信系统可以与检测器结合以连接路边和车辆发送/接收的信息。