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公开(公告)号：US4489280A
公开(公告)日：1984-12-18
申请号：US398527
申请日：1982-07-15
CPC分类号： G06G7/1928
摘要： A signal processor for detecting the presence of two signals whose over-all phase or frequency is related by a known rational number. The first signal of frequency .omega.M is raised to the N.sup.th power, while the second signal of frequency .omega.N is raised to the M.sup.th power. The two raised signals are then correlated, energy detected, and compared against a predetermined threshold to provide an indication when both signals are present. By utilizing the known frequency relationship between the two signals the processor yields enhanced detection performance over that achievable by detection of each signal separately.
摘要翻译： 一个信号处理器，用于检测其全部相位或频率与已知有理数相关的两个信号的存在。 频率ωM的第一信号升高到第N次，而频率ωN的第二信号升高到第M次方。 然后将两个升高的信号相关，检测能量，并与预定阈值进行比较，以在两个信号都存在时提供指示。 通过利用两个信号之间的已知频率关系，处理器通过分别检测每个信号可以实现提高的检测性能。
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公开(公告)号：US4463356A
公开(公告)日：1984-07-31
申请号：US293730
申请日：1981-08-17
申请人： Robert D. Short, III , Clarence L. Bennett, Jr. , Richard M. Barnes , Robert S. Smith , Harold W. Pyle
发明人： Robert D. Short, III , Clarence L. Bennett, Jr. , Richard M. Barnes , Robert S. Smith , Harold W. Pyle
IPC分类号： G01S13/526 , G01S9/42
CPC分类号： G01S13/526
摘要： An apparatus for control of ground clutter breakthrough in MTI radar which remove hard limited clutter signals while allowing increased detection sensitivity to moving targets when such strong clutter returns are not present. Logic is provided to prevent the removal of strong moving target return even in the presence of hard limited clutter.
摘要翻译： 一种用于控制MTI雷达中的地面杂波突破的装置，其能够在不存在这样强的杂波返回的同时允许增加对移动目标的检测灵敏度的同时去除硬限制的杂波信号。 提供逻辑以防止即使在存在硬限制杂波的情况下去除强移动目标返回。
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公开(公告)号：US4077488A
公开(公告)日：1978-03-07
申请号：US696444
申请日：1976-06-15
CPC分类号： G05D1/0231 , A01B69/008 , B62D1/28 , G05D2201/0201 , Y10S56/15
摘要： A guidance assist system is mounted on an agricultural machine for directing the lateral movement thereof with respect to the severed edge of the crop material being harvested thereby. The crop, including the severed edge, is periodically, optically, scanned and an output signal, in response to the reflected illumination therefrom, is generated having a discontinuity therein representative of the severed crop edge. The deviation of this discontinuity from a predetermined point along the scan is determined by the apparatus and an error signal representative thereof is coupled to the utilization means for directing the lateral movement of the agricultural machine such that the error signal is reduced towards zero.
摘要翻译： 引导辅助系统安装在农业机器上，用于引导其相对于正在收获的作物材料的切断边缘的横向运动。 定期地，光学地扫描作物，包括切断的边缘，并且产生响应于其反射照明的输出信号，其中表示切断的作物边缘的不连续性。 这种不连续性与沿着扫描的预定点的偏差由设备确定，并且代表其的误差信号被耦合到用于引导农业机器的横向移动的利用装置，使得误差信号被减小到零。
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公开(公告)号：US4323898A
公开(公告)日：1982-04-06
申请号：US161797
申请日：1980-06-23
CPC分类号： G01S7/024
摘要： An apparatus and method for detecting the polarization of signals reflected from targets immersed in clutter. Signals reflected from targets illuminated with quasimonochromatic electromagnetic signals such as FMCW radar are received by antennas responsive to orthogonally polarized components of the reflected signals. These received orthogonal signal components are then modified such that one component is phase shifted with respect to the other signal components, and the amplitudes of the signal components are varied according to predetermined angles of polarization. The resulting signals are further analyzed in a processor which detects the polarization of the reflected signals by estimating the Stokes parameters for the reflected signal. The Stokes parameters may then be used to generate detection criteria that are compared to a predetermined threshold level.
摘要翻译： 一种用于检测从浸没在杂波中的目标反射的信号的极化的装置和方法。 用诸如FMCW雷达之类的准像色电磁信号照射的目标反射的信号由响应于反射信号的正交极化分量的天线接收。 然后对这些接收到的正交信号分量进行修改，使得一个分量相对于其他信号分量相移，并且信号分量的幅度根据预定的偏振角度而变化。 在通过估计反射信号的斯托克斯参数来检测反射信号的偏振的处理器中进一步分析所得到的信号。 然后可以使用斯托克斯参数来产生与预定阈值水平进行比较的检测准则。
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5.发明授权Apparatus and method for detecting the onset of a frequency shift keyed signal 失效用于检测频移键控信号的开始的装置和方法
公开(公告)号：US4423519A
公开(公告)日：1983-12-27
申请号：US340941
申请日：1982-01-20
摘要： An incoming signal is tested for the presence or onset of a frequency shift keyed (FSK) signal which alternates at a known rate between two unknown frequencies separated by a known frequency shift. The incoming signal is time delayed an odd multiple of the keying period and the delayed signal is multiplied by the incoming signal to produce sum and difference frequencies when the FSK signal is present. The difference frequency is selected by filtration, demodulated and integrated to produce a useable detector signal. The detector signal is compared with a threshold signal which is generated to discriminate between the FSK signal and other unwanted signals or noise in the communication channel.
摘要翻译： 测试输入信号的频移键控（FSK）信号的存在或开始，其以已知频率间隔的两个未知频率之间的已知速率交替。 输入信号被延时为键控周期的奇数倍，并且延迟信号乘以输入信号，以在存在FSK信号时产生和和差频率。 通过过滤，解调和集成来选择差分频率，以产生可用的检测器信号。 将检测器信号与产生的阈值信号进行比较，以鉴别FSK信号和通信信道中的其他不需要的信号或噪声。
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公开(公告)号：US4205797A
公开(公告)日：1980-06-03
申请号：US955855
申请日：1978-10-30
CPC分类号： A01F29/095 , A01F29/16 , G01B7/14
摘要： Magnetic-electronic apparatus for sensing the clearance between two ferrous metals, for application in measuring the clearance between a shear bar and the cutting knives of a harvesting farm machine, is disclosed having a magnetic sensor disposed within the shear bar for producing a magnetic field, the interception of which by the passage of a knife produces an electronic signal which is processed by appropriate circuitry for indicating the clearance between the knives and the shear bar.
摘要翻译： 公开了用于感测两种黑色金属之间的间隙的磁电子装置，用于测量剪切杆与收割农机的切割刀之间的间隙，其具有设置在剪切杆内用于产生磁场的磁传感器， 通过刀的截取产生的电子信号由适当的电路处理以指示刀和剪切杆之间的间隙。
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公开(公告)号：US3972156A
公开(公告)日：1976-08-03
申请号：US552387
申请日：1975-02-24
CPC分类号： G01V3/08 , A01D75/187 , Y10S56/15
摘要： A static magnetic field detector for harvesting machines senses the passage of ferrous or magnetic objects utilizing a balanced magnetic field excitation configuration which provides substantial self-cancellation of spurious background signals. A novel filtering means provides normalization of the fluctuations in the background noise due to the variations in the angular velocity of the rotating harvesting machine components. Additionally, the detector apparatus is disposed within a compressor feed roll of the machine thereby reducing the area which must be scanned and increasing the sensitivity of the device.
摘要翻译： 用于收获机器的静态磁场检测器使用平衡的磁场激励配置来感测铁或磁性物体的通过，其提供假背景信号的实质上的自消除。 新颖的滤波装置由于旋转的收获机器部件的角速度的变化而提供背景噪声波动的归一化。 此外，检测器装置设置在机器的压缩机进给辊内，从而减少必须扫描的区域并增加装置的灵敏度。
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