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1. 发明授权

US5281965A Vehicle detector measurement frame segmentation 失效
标题翻译：车辆检测器测量帧分割
公开(公告)号：US5281965A
公开(公告)日：1994-01-25
申请号：US716082
申请日：1991-06-17
申请人： Earl B. Hoekman , Samuel Bernard, Jr.
发明人： Earl B. Hoekman , Samuel Bernard, Jr.
IPC分类号： G01V3/10 , G08G1/01 , G08G1/017 , G08G1/042
CPC分类号： G08G1/042
摘要： A vehicle detector includes one or more inductive sensors connected to an oscillator circuit. A timing circuit defines a plurality of sequential measurement frame segments. The oscillator circuit is coupled to an inductive sensor during each of the measurement frame segments. The time duration of each of the plurality of measurement frame segments is measured. After the completion of each frame segment for a particular inductive sensor, a total measurement frame time duration for that sensor is calculated based upon durations of a predetermined number of measurement frame segments for that sensor. The total measurement frame time duration and a reference time duration are compared and a difference is determined. If the difference between the total measurement frame time duration and the reference time duration exceeds a threshold value, an output signal indicative of the presence of a vehicle in the vicinity of the inductive sensor is generated.
摘要翻译：车辆检测器包括连接到振荡器电路的一个或多个感应传感器。定时电路定义多个顺序测量帧段。在每个测量帧段期间，振荡器电路耦合到感应传感器。测量多个测量帧段中的每一个的持续时间。在特定感应传感器的每个帧段完成之后，基于该传感器的预定数量的测量帧段的持续时间来计算该传感器的总测量帧持续时间。比较总测量帧持续时间和参考持续时间，确定差异。如果总测量帧持续时间和参考持续时间之间的差超过阈值，则产生表示在感应传感器附近存在车辆的输出信号。

2. 发明授权

US5850192A Apparatus for sensing vehicles 失效
标题翻译：用于感测车辆的装置
公开(公告)号：US5850192A
公开(公告)日：1998-12-15
申请号：US777298
申请日：1996-12-27
申请人： Frederick J. Turk , Claude E. Cybulski , Earl B. Hoekman
发明人： Frederick J. Turk , Claude E. Cybulski , Earl B. Hoekman
IPC分类号： G01P3/64 , G01V3/00 , G01V3/10 , G08G1/042 , G08G1/01
CPC分类号： G08G1/042 , G01V3/00 , G01V3/10
摘要： An underground vehicle sensing system extends below a vehicle travel surface to detect the presence of a vehicle. A conduit extends substantially horizontally underground from an access hole placed at the side of the vehicle travel surface. A plurality of sensors are spaced apart in the conduit to detect localized changes in the magnetic field. A plurality of sections house the probes and wiring to orient and position the probes. Sections detachably clip together to form a lightweight support structure and may be added one by one through the access hole. Lightweight extension members are utilized in some configurations between the support sections for positioning and supporting the probes.
摘要翻译：地下车辆感测系统延伸到车辆行驶表面下方以检测车辆的存在。导管从位于车辆行驶表面侧面的进入孔基本上水平地延伸。多个传感器在导管中间隔开以检测磁场中的局部变化。多个部分容纳探针和布线以使探针定向和定位。部分可拆卸地夹在一起以形成轻质的支撑结构，并且可以通过进入孔一个接一个地添加。在用于定位和支撑探针的支撑部分之间的一些构造中使用轻量级的延伸构件。

3. 发明授权

US5508698A Vehicle detector with environmental adaptation 失效
标题翻译：车载探测器与环境适应
公开(公告)号：US5508698A
公开(公告)日：1996-04-16
申请号：US99257
申请日：1993-07-29
申请人： Earl B. Hoekman
发明人： Earl B. Hoekman
IPC分类号： G08B13/22 , G08G1/042 , G08G1/01
CPC分类号： G08G1/042
摘要： A reference value used in a vehicle detector is checked and adjusted. The vehicle detector determines the speed of a vehicle which it has detected and then makes a sample measurement after the vehicle has left the detection area of its inductive sensor. The timing of the measurement is based on the speed of the vehicle. The sample measurement is compared to the reference value, and adjustment of the reference value is made accordingly. In order to identify the cause of changes in the sensor drive oscillator signal frequency, the frequency of the oscillator signal is measured while connected to a dummy sensor not affected by vehicles. The reference value also is adjusted to reflect slow changes (drift) in sensor drive oscillator frequency. To identify changes in sensor drive oscillator frequency caused by mechanical difficulties which require maintenance activity to correct, a rate of frequency change of the sensor drive oscillator signal is determined over the plurality of measurement scanning segments.
摘要翻译：检查并调整车辆检测器中使用的基准值。车辆检测器确定其检测到的车辆的速度，然后在车辆离开其感应传感器的检测区域之后进行样本测量。测量的时间是基于车辆的速度。将样品测量与参考值进行比较，并相应地调整参考值。为了识别传感器驱动振荡器信号频率变化的原因，在连接到不受车辆影响的虚拟传感器时测量振荡器信号的频率。参考值也被调整以反映传感器驱动振荡器频率的慢变化（漂移）。为了识别由需要维护活动来校正的机械困难引起的传感器驱动振荡器频率的变化，在多个测量扫描段上确定传感器驱动振荡器信号的频率变化率。

4. 发明授权

US5734338A Vehicle detector with automatic sensitivity adjustment 失效
标题翻译：车辆检测器具有自动灵敏度调节
公开(公告)号：US5734338A
公开(公告)日：1998-03-31
申请号：US351889
申请日：1994-12-08
申请人： Earl B. Hoekman , Martin C. Henderson
发明人： Earl B. Hoekman , Martin C. Henderson
IPC分类号： G01N27/72 , G01R23/02 , G01V3/10 , G08G1/015 , G08G1/042 , G08G1/01
CPC分类号： G08G1/042 , G01V3/101
摘要： The period T.sub.nv of an oscillator signal is measured. A number N.sub.meas of cycles of the oscillator signal is determined based upon the measured oscillator period T.sub.nv and upon a desired minimum change in inductance .DELTA.L (sensitivity) which will result in an object being detected. The N.sub.meas cycles of the oscillator signal represent a measurement period. The length of the measurement period, defined by N.sub.meas oscillator cycles, is periodically determined. The length of the measurement period is compared to a reference value. An output, based upon the results of the comparison, is provided. Thereafter, the desired minimum change in inductance .DELTA.L (sensitivity) may be automatically adjusted by determining an average magnitude change in inductance .DELTA.L.sub.ave caused by a plurality of vehicles. The number N.sub.meas of oscillator cycles, which define the measurement period, is recalculated based upon the average magnitude change in inductance.
摘要翻译：测量振荡器信号的周期Tnv。基于测量的振荡器周期Tnv以及在导致检测到对象的电感DELTA L（灵敏度）的期望的最小变化来确定振荡器信号的周期数Nmeas。振荡器信号的Nmeas周期表示测量周期。由Nmeas振荡器周期定义的测量周期的长度被周期性地确定。将测量周期的长度与参考值进行比较。提供了基于比较结果的输出。此后，可以通过确定由多个车辆引起的电感DELTA Lave的平均幅度变化来自动调节所需的电感DELTA L（灵敏度）的最小变化。基于电感的平均幅度变化重新计算定义测量周期的振荡器周期数Nmeas。

5. 发明授权

US5361064A Vehicle detector with power main noise compensation 失效
标题翻译：车载检测器，带电源主噪声补偿
公开(公告)号：US5361064A
公开(公告)日：1994-11-01
申请号：US716299
申请日：1991-06-17
申请人： Steven M. Hamer , Earl B. Hoekman
发明人： Steven M. Hamer , Earl B. Hoekman
IPC分类号： G01V3/10 , G08G1/01 , G08G1/017 , G08G1/042
CPC分类号： G08G1/042
摘要： A vehicle detector includes an inductive sensor which is driven by an oscillator to produce an oscillator signal having a frequency which is a function of inductance of the inductive sensor. Presence of a vehicle is detected when measured frequency of the oscillator signal changes by more than a threshold value. The effects of magnetic flux produced by adjacent power lines are compensated by measuring the frequency of the oscillator signal during a plurality of sample periods and characterizing the fluctuation of the measured frequency as a function of phase of a power main signal. During a normal measurement period, the frequency of the oscillator signal is measured, and the phase of the power main signal during the measurement period is determined. An output signal is produced based upon the measured frequency, the phase, and the known fluctuation of measured frequency as a function of phase of the power main signal.
摘要翻译：车辆检测器包括感应传感器，其由振荡器驱动以产生具有与感应传感器的电感的函数的频率的振荡器信号。当振荡器信号的测量频率改变超过阈值时，检测车辆的存在。通过在多个采样周期期间测量振荡器信号的频率并且表征作为功率主信号的相位的函数的测量频率的波动来补偿由相邻电力线产生的磁通量的影响。在通常的测量周期期间，测量振荡器信号的频率，并确定测量期间的功率主信号的相位。基于测量的频率，相位以及作为功率主信号的相位的函数的测量频率的已知波动产生输出信号。

6. 发明授权

US4994714A Automatic alteration of the operation of a radiant energy transmitter 失效
标题翻译：自动改变辐射能量发射器的操作
公开(公告)号：US4994714A
公开(公告)日：1991-02-19
申请号：US344909
申请日：1989-04-28
申请人： Earl B. Hoekman , Karl P. Schaller
发明人： Earl B. Hoekman , Karl P. Schaller
IPC分类号： G08G1/087
CPC分类号： G08G1/087
摘要： A radiant energy transmitter for use with a motor vehicle wherein operation of the triggered radiant energy device of the transmitter is altered via an operation altering circuit portion when an alteration initiating switch assumes its alteration mode. Such alteration mode is automatically assumed when the operator carries out an action that is normally done after the motor vehicle is stopped. The operation altering circuit portion continues the altered operation even though the alteration mode of the alteration altering switch is subsequently discontinued.

7. 发明授权

US4972185A Radiant energy signal transmitter 失效
标题翻译：辐射能量信号发射机
公开(公告)号：US4972185A
公开(公告)日：1990-11-20
申请号：US344748
申请日：1989-04-28
申请人： James L. Stopa , Earl B. Hoekman
发明人： James L. Stopa , Earl B. Hoekman
IPC分类号： G08G1/087
CPC分类号： G08G1/087
摘要： An radiant energy transmitter that includes a d.c. to d.c. converter, a d.c. energy storage circuit portion, a triggered radiant energy signaling device, a trigger pulse circuit to initiate operation of the signaling device and an operator adjustable trigger pulse timer circuit portion supplying signals to the trigger pulse circuit at a repetition rate selected by an operator with each signal causing the trigger pulse circuit to provide a trigger pulse to initiate an operation of the signaling device.

8. 发明授权

US4581524A Flexible ferromagnetic marker for the detection of objects having markers secured thereto 失效
标题翻译：用于检测具有固定到其上的标记的物体的柔性铁磁标记
公开(公告)号：US4581524A
公开(公告)日：1986-04-08
申请号：US488687
申请日：1983-04-26
申请人： Earl B. Hoekman , Samuel Montean
发明人： Earl B. Hoekman , Samuel Montean
IPC分类号： D06H1/04 , G01V15/00 , G08B13/24 , G11B33/04 , G06K19/06
CPC分类号： G08B13/2411 , D06H1/04 , G01V15/00 , G08B13/2437 , G08B13/2442 , G08B13/2445 , G11B33/0488
摘要： A marker adapted to be used with cloth or fabric articles to enable the detection thereof in an electromagnetic article surveillance system within which the marker generates a detectable signal related to an alternating electromagnetic field applied within an interrogation zone, wherein the marker comprises an elongated strip of amorphous ferromagnetic ribbon sealed on all major surfaces within flexible polymeric cover layers having a low rate of water vapor transmission, and a high degree of thermal stability, puncture resistance and conformability, such that the articles having the marker included therein may be subjected to repeated flexing and high temperature and humidity conditions such as encountered in commercial laundry operations without affecting the magnetic properties of the marker, while also not appreciably stiffening the article itself, thus being readily attached to or concealed therein.
摘要翻译：一种适于与布或织物制品一起使用的标记，以便能够在电磁制品监视系统中进行检测，其中所述标记产生与在询问区内施加的交变电磁场相关的可检测信号，其中所述标记包括在具有低水蒸汽透过率的柔性聚合物覆盖层内的所有主表面上密封的非晶铁磁带，以及高度的热稳定性，抗刺穿性和适形性，使得其中包含标记的制品可能经受反复弯曲以及诸如在商业洗衣操作中遇到的高温度和湿度条件，而不影响标记的磁性，同时也不会使制品本身明显变硬，因此易于附着或隐藏在其中。

9. 发明授权

US5278555A Single inductive sensor vehicle detection and speed measurement 失效
标题翻译：单感应传感器车辆检测和速度测量
公开(公告)号：US5278555A
公开(公告)日：1994-01-11
申请号：US716649
申请日：1991-06-17
申请人： Earl B. Hoekman
发明人： Earl B. Hoekman
IPC分类号： G01P11/00 , G01V3/10 , G08G1/01 , G08G1/015 , G08G1/017 , G08G1/042 , G08G1/052
CPC分类号： G08G1/015 , G08G1/042 , G08G1/052
摘要： A determination is made whether a minimum threshold period (or frequency) change has occurred in an oscillator signal indicating the initial presence of a vehicle over an inductive sensor. The change in period of the oscillator signal is measured over each of a plurality of frame segments. A magnitude of period change in the oscillator signal is recorded. If the number of frame segments that occur between detection of the threshold change in period and the magnitude change in period is less than a predetermined number, the detector does not make a speed measurement calculation. If the number of frame segments equals or exceeds the predetermined number, the time rate of change of the period of the oscillator signal is estimated. A vehicle detector calculates a sensor entry distance for a particular vehicle. A vehicle entry time is calculated by dividing the magnitude of period change by the rate of period change. Speed is then calculated by dividing the entry distance by the vehicle entry time. The speed measurement is directed to an output by activating the output for a period of time proportional to the speed of the vehicle. Multiple vehicles may be detected by adjusting the minimum threshold period change, after each vehicle passes, by the peak change in oscillator signal period caused by that vehicle. Vehicle length may be calculated by multiplying the measured speed by the total time between vehicle entry and exit from the loop area, and subtracting the length of the detection area.
摘要翻译：确定在表示车辆在电感式传感器上的初始存在的振荡器信号中是否发生了最小阈值周期（或频率）变化。在多个帧段中的每一个上测量振荡器信号的周期的变化。记录振荡器信号的周期变化幅度。如果在周期的阈值变化的检测与期间的幅度变化之间发生的帧段的数量少于预定数量，则检测器不进行速度测量计算。如果帧段的数量等于或超过预定数量，则估计振荡器信号周期的时间变化率。车辆检测器计算特定车辆的传感器进入距离。通过将周期变化的幅度除以周期变化率来计算车辆进入时间。然后通过将入口距离除以车辆进入时间来计算速度。通过将输出激活与车辆的速度成比例的一段时间，将速度测量指向输出。可以通过在车辆通过之后通过由该车辆引起的振荡器信号周期的峰值变化来调整最小阈值周期变化来检测多个车辆。车辆长度可以通过将测量的速度乘以车辆进入和退出循环区域之间的总时间，并减去检测区域的长度来计算。

10. 发明授权

US5153525A Vehicle detector with series resonant oscillator drive 失效
标题翻译：具有串联谐振振荡器驱动的车辆检测
公开(公告)号：US5153525A
公开(公告)日：1992-10-06
申请号：US716010
申请日：1991-06-17
申请人： Earl B. Hoekman , Steven M. Hamer
发明人： Earl B. Hoekman , Steven M. Hamer
IPC分类号： G01R27/26 , G01V3/10 , G08G1/042
CPC分类号： G08G1/042
摘要： An inductive sensor is driven by a series resonant oscillator circuit to produce an oscillator signal having a frequency which is a function of inductance of the inductive sensor. An inductive load, which includes the sensor, is connected in series with a capacitive impedance. Power to the series resonant circuit formed by the inductive load and the capacitive impedance is controlled as a function of current in the series circuit as sensed by a current sensor. A detection system provides a detector output based upon the frequency of the oscillator signal.

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