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1. 发明授权

US4405990A Apparatus for determining the ratio of two signal repetition rates 失效
标题翻译：用于确定两个信号重复率的比率的装置
公开(公告)号：US4405990A
公开(公告)日：1983-09-20
申请号：US282999
申请日：1981-05-26
申请人： William Pickering , David J. Urbanc
发明人： William Pickering , David J. Urbanc
IPC分类号： G06F7/68 , G01L19/04
CPC分类号： G06F7/68
摘要： A measurement circuit which is rendered insensitive to temperature and other environmental quantities comprising first and second electrically identical sensor elements (10, 12) which are alternately connected through multiplexed gates (G1, G2) into the tank circuit of an oscillator (14) to generate first and second signal frequencies f.sub.1 and f.sub.2. The first frequency f.sub.1 varies in the same sense with both temperature and the measured signal quantity but the second signal f.sub.2 varies in one sense with temperature and in the opposite sense with the measured signal quantity. A logic circuit (18) is provided for generating an output signal proportional to the ratio of f.sub.1 and f.sub.2. The ratio of the two signals is achieved by frequency dividing f.sub.1 and using the result as a variable length gating signal for f.sub.2. A non-multiplexed system using matched oscillators is also disclosed.
摘要翻译： PCT No.PCT / US81 / 00711 Sec。 371日期：1981年5月26日 102（e）日期1981年5月26日PCT提交日期为1981年5月26日PCT公布。出版物WO82 / 04338 日期：1982年12月9日。一种对温度和其他环境量不敏感的测量电路，包括通过多路复用门（G1，G2）交替连接到第一和第二电相同的传感器元件（10,12）产生第一和第二信号频率f1和f2的振荡器（14）。第一频率f1在温度和测量信号数量上都以相同的意义变化，但是第二信号f2在一个意义上随着温度而变化，并且与测量的信号量相反。提供逻辑电路（18），用于产生与f1和f2成比例的输出信号。两个信号的比例通过分频f1来实现，并且使用结果作为f2的可变长度门控信号。还公开了使用匹配振荡器的非多路复用系统。

2. 发明授权

US5880681A Apparatus for determining the position of a work implement 失效
标题翻译：用于确定工作装置的位置的装置
公开(公告)号：US5880681A
公开(公告)日：1999-03-09
申请号：US931335
申请日：1997-09-16
申请人： George Codina , Thomas W. Herrick , David J. Urbanc
发明人： George Codina , Thomas W. Herrick , David J. Urbanc
IPC分类号： E02F9/20 , E02F3/84 , G01D5/20 , G01S7/03 , G01S13/88 , G01R33/32
CPC分类号： E02F3/847 , G01D5/202
摘要： An apparatus for determining the position of a work implement relative to an earthworking machine. An antenna is mounted to the machine and is oriented to transmit a high frequency signal toward the implement and receive a reflected signal back from the implement. An oscillator is electrically coupled to the antenna and energizes the antenna with electrical energy to generate the high frequency signal. The oscillator produces an output signal having a frequency responsive to the inductance of the antenna. A microprocessor based circuit receives the output signal of the oscillator and responsively determines the position of the work implement relative to the machine. The position of the work implement is a function of the frequency of the output signal.
摘要翻译：一种用于确定工作装置相对于土方机械的位置的装置。将天线安装到机器上并且被定向成朝向工具传送高频信号并从工具接收反射信号。振荡器电耦合到天线，并用电能激励天线以产生高频信号。振荡器产生具有响应于天线的电感的频率的输出信号。基于微处理器的电路接收振荡器的输出信号并且响应地确定工作装置相对于机器的位置。工作装置的位置是输出信号的频率的函数。

3. 发明授权

US4370891A Dual element-single oscillator-ratio type digital transducer 失效
标题翻译：双元件单振荡比型数字换能器
公开(公告)号：US4370891A
公开(公告)日：1983-02-01
申请号：US283000
申请日：1981-05-26
申请人： William Pickering , David J. Urbanc
发明人： William Pickering , David J. Urbanc
IPC分类号： G01L9/10 , G01L19/04
CPC分类号： G01L9/105
摘要： A compensated measurement system utilizing dual sensing elements (10, 12) and a single variable frequency oscillator (14). A common operative association between the sensing elements (10, 12) and the oscillator (14) is achieved by multiplexing. Temperature and supply voltage variations are compensated by generating an output (f.sub.0) which is proportional to the ratio of the two generated frequencies (f.sub.1, F.sub.2).
摘要翻译：一种利用双重感测元件（10,12）和单个可变频率振荡器（14）的补偿测量系统。感测元件（10,12）和振荡器（14）之间的公共操作关联通过复用实现。通过产生与两个生成的频率（f1，F2）的比率成比例的输出（f0）来补偿温度和电源电压变化。

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