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1.发明授权
公开(公告)号：US4467283A
公开(公告)日：1984-08-21
申请号：US304916
申请日：1981-09-23
IPC分类号： G01V3/02
CPC分类号： G01V3/02
摘要： A geophysical exploration system uses a single conductor cable connected to a current source, the cable having a number of earth probes coupled to it at spaced points with addressable switching units. The switching units are activated in sequence so that the probes inject current into the earth. At locations spaced from the probes the resistivity is measured and recorded for each injection. Resistivity measurements are compared with anomaly models to find a match of patterns, indicating the presence, size and location of an anomaly.
摘要翻译： 地球物理勘探系统使用连接到电流源的单根导体电缆，该电缆具有多个接地探针，其间隔开的位置与可寻址的开关单元相连。 开关单元依次被激活，使得探针将电流注入地球。 在与探针隔开的位置处，每次注射测量和记录电阻率。 将电阻率测量与异常模型进行比较以找到模式匹配，指示异常的存在，大小和位置。
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公开(公告)号：US4409899A
公开(公告)日：1983-10-18
申请号：US286819
申请日：1981-07-27
摘要： An acoustic target sensor and ranging system automatically detects military targets and provides a munition firing signal at the appropriate target position and time. An amplitude-doppler circuit is utilized to predict the time of closest approach to a munition by a target by measuring the time interval between zero crossings of the second and third derivatives of the received acoustic wave amplitude function. The circuit produces a firing signal by logically ANDing the closest point of approach signal it develops with a signal that indicates when target range is within specified limits. The circuit is realized by means of conventional electronic zero crossing detectors, an up-down counter, dividers, sample and hold devices and voltage comparators. The acoustic target signal is obtained from an omni-directional microphone the output of which is amplified and rectified.
摘要翻译： 声目标传感器和测距系统自动检测军事目标，并在适当的目标位置和时间提供弹药点火信号。 使用幅度 - 多普勒电路来通过测量接收的声波振幅函数的第二和第三导数的过零之间的时间间隔来预测由目标最接近的弹药的时间。 该电路通过逻辑地将其产生的最接近的接近信号点与指示何时目标范围在指定限度内的信号进行逻辑AND产生触发信号。 电路通过传统的电子零交叉检测器，升降计数器，分频器，采样和保持装置以及电压比较器来实现。 声目标信号是从全向麦克风获得的，该麦克风的输出被放大并整流。
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公开(公告)号：US4408533A
公开(公告)日：1983-10-11
申请号：US286820
申请日：1981-07-27
摘要： Munition actuation signals are generated by an acoustic target ranging system that predicts the time and distance of closest approach of a moving target to a munition. The predictive capability of the system is based on the rate of change of the sound level emanating from the target compared to its absolute magnitude. The system generates munition standby, arm and fire signals by differencing the received acoustic amplitude function signal and its first derivative and subsequently comparing the difference signal with various reference level signals. The reference level signals are a function of munition effective range and target conditions. Mechanization of the system is realized by simple circuitry consisting of an acoustic signal detector and processor, a differentiating operational amplifier, a programmable gain amplifier, a reference level signal source, an adder and a comparator circuit.
摘要翻译： 弹道致动信号由声目标测距系统产生，该目标测距系统预测移动目标对弹药的最近接近的时间和距离。 该系统的预测能力是基于与其绝对量值相比，从目标发出的声级的变化率。 系统通过差分收到的声振幅函数信号及其一阶导数来产生弹药待命，起火信号，随后将差分信号与各种参考电平信号进行比较。 参考电平信号是弹药有效范围和目标条件的函数。 通过由声信号检测器和处理器，微分运算放大器，可编程增益放大器，参考电平信号源，加法器和比较器电路组成的简单电路来实现系统的机械化。
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