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公开(公告)号：US06130607A
公开(公告)日：2000-10-10
申请号：US175121
申请日：1998-10-19
IPC分类号： A01D34/64 , B60R21/00 , G01S7/28 , G01S13/56 , G01S13/93 , G08B21/00 , H01Q1/32 , H01Q9/27 , B60Q1/00
CPC分类号： H01Q9/27 , G01S13/56 , G01S13/931 , G01S7/2813 , H01Q1/3233 , G01S2013/9317 , G01S2013/9346 , G01S2013/9375 , G01S2013/9378 , G01S2013/9385
摘要： A protection sensor for a lawn vehicle includes a substantially unidirectional antenna operatively coupled to a Doppler detection circuit. The Doppler detection circuit generates a radio frequency signal which is radiated by the antenna. When the radiated signal strikes an object, such as a person, animal or another moving lawn vehicle, within a predefined detection region of the sensor, the signal is reflected and received by the antenna. The Doppler detection circuit generates an output signal responsive to a difference in frequency between the radiated signal and the reflected signal, thereby indicating the presence of the moving object within the protection region of the sensor. The unidirectional antenna virtually eliminates false detections generated by the lawn vehicle, to which the sensor is mounted, or by the operator of the vehicle.
摘要翻译： 用于草坪车辆的保护传感器包括可操作地耦合到多普勒检测电路的基本单向天线。 多普勒检测电路产生由天线辐射的射频信号。 当辐射信号在传感器的预定义的检测区域内撞击诸如人，动物或其他移动草坪车辆的物体时，信号被天线反射和接收。 多普勒检测电路响应于辐射信号和反射信号之间的频率差产生输出信号，从而指示移动物体在传感器的保护区域内的存在。 单向天线实际上消除了由传感器安装到的草坪车辆或车辆操作者产生的错误检测。
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2.发明授权Apparatus and method for real time determination of arc fault energy, location and type 失效用于实时确定电弧故障能量，位置和类型的装置和方法公开(公告)号：US07068045B2
公开(公告)日：2006-06-27
申请号：US10627016
申请日：2003-07-25
IPC分类号： G01R31/08
CPC分类号： H02H1/0015 , H02H7/263
摘要： A detection module and remote load voltage sensor determine a location of a parallel arc for a power circuit between a power source and a load in real time. The detection module provides a value of voltage from the power source. A current sensor measures a value of current flowing in the power circuit to or from the power source. The remote load voltage sensor measures a value of voltage at the load. A microprocessor determines the parallel arc location from the value of voltage from the power source, the value of current, the value of voltage at the load, and a wire resistance or conductance per unit length of the power circuit. In one case, connector resistance is accounted for. In another case, the load voltage is encoded at a predetermined frequency using a switched precision resistor near the load, thereby providing a power line carrier type communication.
摘要翻译： 检测模块和远程负载电压传感器实时确定电源和负载之间的电源电路的并联电弧位置。 检测模块提供来自电源的电压值。 电流传感器测量电源电路中流过或来自电源的电流值。 远程负载电压传感器测量负载电压值。 微处理器根据电源的电压值，电流值，负载电压值，以及电源电路每单位长度的导线电阻或电导率来确定并联电弧位置。 在一种情况下，考虑连接器电阻。 在另一种情况下，使用负载附近的切换精密电阻器以预定频率对负载电压进行编码，从而提供电力线载波型通信。
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公开(公告)号：US06259372B1
公开(公告)日：2001-07-10
申请号：US09235212
申请日：1999-01-22
IPC分类号： G08B2100
CPC分类号： G08C17/02 , G01M13/045
摘要： A self-powered wireless transducer is disclosed for monitoring external physical conditions, such as excessive vibrations in a bearing. The transducer includes an energy conversion source, such as a piezoelectric sensor to sense the external physical condition and create a power and characteristic signal that is used to power an RF transmitting circuit. A transmitter is provided to transmit signals indicative of the external physical condition, or changes in that physical condition, such as increased vibrations in a bearing to detect bearing faults before a breakdown. In this manner, the monitored machinery can be shutdown in an orderly manner and preventative maintenance can be completed. The self-powered wireless transducer includes an voltage storage device to receive electrical voltage from the piezoelectric sensor and a voltage detector to detect the level of voltage on the voltage storage device. Once the voltage detector detects a level of voltage at a predetermined level, an oscillating transmitting circuit is activated for a brief hysteresis period of the voltage detector. The information transmitted not only includes any fault detection, it also includes an address of the origin of the transmission.
摘要翻译： 公开了一种用于监测外部物理条件（例如轴承中的过度振动）的自供电无线换能器。 换能器包括能量转换源，例如用于感测外部物理状况的压电传感器，并且产生用于为RF发射电路供电的功率和特征信号。 提供发射机以发射指示外部物理状况的信号，或者在该物理条件下的改变，例如在轴承内增加的振动，以便在击穿之前检测轴承故障。 以这种方式，可以有序地关闭受监视的机器，并且可以完成预防性的维护。 自供电无线传感器包括用于从压电传感器接收电压的电压存储装置和用于检测电压存储装置上的电压电平的电压检测器。 一旦电压检测器检测到预定电平的电平，则振荡发射电路在电压检测器的短暂滞后期间被激活。 传输的信息不仅包括任何故障检测，还包括传输原点的地址。
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4.发明授权Remote wireless switch sensing circuit using RF transceiver in combination with a SAW chirp processor 失效使用RF收发器与SAW啁啾处理器组合的远程无线开关感测电路
公开(公告)号：US6144288A
公开(公告)日：2000-11-07
申请号：US828377
申请日：1997-03-28
申请人： Ronald R. Jahn , Ruth E. Hubbell , David L. McClanahan , Walter L. Rutchik , Gordon Barr Spellman
发明人： Ronald R. Jahn , Ruth E. Hubbell , David L. McClanahan , Walter L. Rutchik , Gordon Barr Spellman
IPC分类号： G06K19/067 , H04Q1/00
CPC分类号： G06K19/067
摘要： A circuit assembly senses a state of a variable state device, wherein a data signal representative of the state is communicated via wireless telegraphy. A surface acoustic wave (SAW) device, having a plurality of interdigital transducers (IDTs) comprises a wave launching IDT and a state information IDT, wherein the plurality of IDTs are in acoustical communication and the state information IDT is in electrical communication with an antenna through the variable state device. An RF transceiver communicates a trigger signal to the SAW device, wherein the trigger signal causes a launching of a SAW wave from the wave launching IDT towards the state information IDT. The state information IDT generates a signal pulse in response thereto and communicates the pulse to the antenna through the variable state device. A transceiver control module, in operative communication with the RF transceiver enables communication of the trigger signal and reads the data signal, wherein the trigger signal and data signal are communicated between the RF transceiver in the SAW device via wireless telegraphy.
摘要翻译： 电路组件检测可变状态设备的状态，其中表示状态的数据信号通过无线电报进行通信。 具有多个叉指式换能器（IDT）的表面声波（SAW）装置包括波浪发射IDT和状态信息IDT，其中多个IDT处于声学通信状态，状态信息IDT与天线电通信 通过可变状态设备。 RF收发器将触发信号传送到SAW器件，其中触发信号引起从波发射IDT向状态信息IDT发射SAW波。 状态信息IDT响应于此产生信号脉冲，并通过可变状态装置将该脉冲传送到天线。 与RF收发器操作通信的收发器控制模块使得能够通信触发信号并读取数据信号，其中触发信号和数据信号通过无线电报在SAW装置中的RF收发器之间通信。
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公开(公告)号：US5229841A
公开(公告)日：1993-07-20
申请号：US727730
申请日：1991-07-10
CPC分类号： G01J3/02 , G01J3/0218 , G01J3/50 , G01J3/501 , G01J3/524 , G01N2201/084
摘要： A device (1) for photoelectrically sensing the color of an object (18) includes a plurality of light emitting diodes (4, 6, 8) emitting light in a narrow range of wavelengths and where the light is transmitted through a corresponding fiber optic bundle (10, 12, 14) with a diameter in proportion to the transmission loss of the bundle and in inverse proportion to the emitted light energy of the corresponding light emitting diode and in proportion to the spectral response of a receiving photodiode (24). A receiving section (22) utilizes a PIN type photodiode (24) with an input section (40) that matches the shape of a receiving optical fiber bundle termination (42) where the photodiode (24) converts the reflected light from the object (18) into electrical signals which are then processed by a microprocessor (28) which also controls the activation of the light emitting diodes (4, 6, 8) and outputs a signal indicative of the color of the object (18).
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