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公开(公告)号：US6163259A
公开(公告)日：2000-12-19
申请号：US326789
申请日：1999-06-04
摘要： A non-linear junction detector designed for counter surveillance measures achieves superior performance by transmitting a series of pulses and receiving harmonics of the transmitted pulse signals that are re-radiated by a non-linear junction such as would be found in an eavesdropping device containing a semiconductor. The transmit power of the series of pulses is varied and the amplitudes of the harmonics received at the different power levels are compared to determine the type of non-linear junction detected. The received harmonic signals are demodulated to create signals having a frequency in the audible range of human ears. The demodulated signals are broadcast so that an operator of the non-linear junction detector can audibly distinguish between the noise responses produced by the different types of non-linear junctions. The harmonic signals are analyzed to determine if the harmonic, signals correspond to signals produced by a known type of non-linear junction device such as a video camera or tape recorder. Data generated by the non-linear junction detector is displayed to an operator of the detector and may be stored for later analysis.
摘要翻译： 设计用于反监视措施的非线性接点检测器通过发送一系列脉冲并接收由非线性接点重新辐射的发射脉冲信号的谐波来实现优异的性能，例如在包含 半导体。 一系列脉冲的发射功率变化，并且比较在不同功率电平下接收到的谐波的振幅，以确定检测到的非线性结的类型。 所接收的谐波信号被解调以产生具有在人耳的可听范围内的频率的信号。 解调的信号被广播，使得非线性结检测器的操作者可以可听地区分由不同类型的非线性接合产生的噪声响应。 分析谐波信号以确定谐波信号是否对应于由已知类型的非线性连接装置（例如摄像机或磁带录像机）产生的信号。 由非线性结检测器生成的数据显示给检测器的操作者，并且可以存储以用于以后的分析。
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2.发明授权Surveillance device detection utilizing non linear junction detection and reflectometry 有权使用非线性结检测和反射测量的监控设备检测公开(公告)号：US07212008B1
公开(公告)日：2007-05-01
申请号：US11266538
申请日：2005-11-03
IPC分类号： G01R31/11
CPC分类号： G01R31/11
摘要： An apparatus for detecting concealed surveillance devices coupled to a transmission line uses either a time domain or frequency domain reflectometry operation to locate any impedance anomalies on the transmission line and a non-linear junction detection operation to classify the located impedance anomalies as semiconductor or non-semiconductor based anomalies. The reflectometry operation utilizes the reflection of a test signal to determine the distance to any reflecting impedance anomalies on the transmission line that may be indicative of an electronic device being coupled to the transmission line. The non-linear junction detection operation then compares the amplitudes of re-radiated second and third harmonics of a transmitted fundamental frequency signal to determine if the reflecting impedance anomalies are the result of a semiconductor based non-linear junction. A DC bias voltage and a balanced load may be added to the transmission line to enhance the line's response to the test signals. Any unidentified semiconductor based anomalies are manually inspected to determine if they represent convert surveillance devices.
摘要翻译： 用于检测耦合到传输线的隐蔽监视装置的装置使用时域或频域反射测量操作来定位传输线上的任何阻抗异常和非线性结检测操作，以将所定位的阻抗异常分类为半导体或非线性结， 半导体的异常。 反射测量操作利用测试信号的反射来确定传输线上任何反射阻抗异常的距离，其可指示耦合到传输线的电子设备。 然后，非线性结检测操作将发射的基频信号的再次辐射的第二和第三谐波的振幅进行比较，以确定反射阻抗异常是否是基于半导体的非线性结的结果。 可以将直流偏置电压和平衡负载添加到传输线，以增强线路对测试信号的响应。 手工检查任何未识别的基于半导体的异常，以确定它们是否代表转换监视设备。
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公开(公告)号：US06397154B1
公开(公告)日：2002-05-28
申请号：US09612934
申请日：2000-07-07
IPC分类号： G06F1900
CPC分类号： G06F17/156
摘要： A new correlation process and implementing apparatus for use in detecting the presence and location of a concealed eavesdropping device is disclosed in the present application. The process correlates a demodulated intercepted signal with a reference signal that corresponds to the sounds present in an environment of interest. A high correlation between the demodulated intercepted signal and the reference signal indicates that the demodulated intercepted signal corresponds to the audio in the environment of interest. An improved Correlation process is implemented using Fast Fourier Transforms to calculate a figure of merit based upon correlation data determined from sampled versions of the reference and intercept signals. The improved process and apparatus further provides a range to the detected surveillance device and multiple range measurements may be used to triangulate on the surveillance device to determine its precise location.
摘要翻译： 在本申请中公开了一种用于检测隐藏的窃听设备的存在和位置的新的相关处理和实施装置。 该过程将解调截取的信号与对应于感兴趣的环境中存在的声音的参考信号相关联。 解调截取的信号与参考信号之间的高相关性指示解调的截取的信号对应于感兴趣的环境中的音频。 使用快速傅立叶变换来实现改进的相关过程，以基于从参考和截距信号的采样版本确定的相关数据来计算品质因数。 改进的过程和装置还提供了检测到的监视装置的范围，并且可以使用多范围测量来对监视装置进行三角测量以确定其精确位置。
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公开(公告)号：US6057765A
公开(公告)日：2000-05-02
申请号：US167844
申请日：1998-10-07
CPC分类号： G08B13/2488 , G08B13/2471 , G08B13/2474
摘要： A non-linear junction detector designed for counter surveillance measures achieves superior performance by using a single circularly polarized antenna to transmit a signal and to receive harmonics of the transmitted signal that are re-radiated by a non-linear junction such as would be found in a eavesdropping device containing a semiconductor. The antenna is mounted on a telescoping antenna extension assembly. A single electrically conductive cable is contained inside the antenna and connects the antenna to the transceiver case which houses the non-linear junction detector electronics. A cable winder is built into the antenna and is employed to provide automatic dispensing and retraction of the cable when the antenna extension assembly is extended or retracted. A display is built into the antenna head assembly to provide signal strength indications and operational information concerning the functioning of the non-linear junction detector to the user of the device. The control signals and power for the display are multiplexed onto the single electrically conductive cable.
摘要翻译： 设计用于反监视措施的非线性接点检测器通过使用单个圆极化天线传输信号并接收由非线性接头重新辐射的发射信号的谐波，实现了卓越的性能，例如 包含半导体的窃听装置。 天线安装在伸缩天线延伸组件上。 天线内部包含一根导电电缆，并将天线连接到收容器外壳，收发器外壳内装有非线性接点检测器电子元件。 天线中内置有电缆缠绕机，当天线延伸组件延伸或缩回时，电缆卷绕器被用于提供电缆的自动分配和收回。 天线头组件中内置有显示器，以向设备的用户提供关于非线性结检测器的功能的信号强度指示和操作信息。 显示器的控制信号和功率被复用到单个导电电缆上。
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公开(公告)号：US09209856B2
公开(公告)日：2015-12-08
申请号：US14022172
申请日：2013-09-09
摘要： A digital spread spectrum non-linear junction detector (NLJD) utilizes the 2.4 GHz transmission band to increase sensitivity to detect smaller electronics. The receiver chain of the NLJD pre-distorts the transmission signal and correlates the result with the response signal to differentiate between target responses and ambient interference signals. A touch screen display displays a signal strength received by the NLJDs receiver at a second harmonic frequency of the 2.4 GHz transmit signal and a signal strength received by the receiver at a third harmonic frequency of the transmit signal. A frequency swept response received by the receiver in response to the transmitted 2.4 GHz transmit signal is graphically displayed on the touch screen. The use of the 2.4 GHz band, touch screen, correlation based target differentiation and frequency swept response display improve the sensitivity and usability of the NLJD and increase the likelihood of it successfully performing its tasks.
摘要翻译： 数字扩频非线性结检测器（NLJD）利用2.4 GHz传输频带提高灵敏度，以检测较小的电子元件。 NLJD的接收机链预失真传输信号，并将结果与响应信号相关，以区分目标响应和环境干扰信号。 触摸屏显示器以2.4GHz发射信号的二次谐波频率显示由NLJD接收机接收的信号强度，以及由发射信号的三次谐波频率接收的信号强度。 接收机响应于所发送的2.4GHz发射信号而接收的频率扫描响应以图形方式显示在触摸屏上。 使用2.4 GHz频段，触摸屏，基于关联的目标区别和频率扫描响应显示提高了NLJD的灵敏度和可用性，并增加了其成功执行任务的可能性。
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公开(公告)号：US20150071330A1
公开(公告)日：2015-03-12
申请号：US14022172
申请日：2013-09-09
摘要： A digital spread spectrum non-linear junction detector (NLJD) utilizes the 2.4 GHz transmission band to increase sensitivity to detect smaller electronics. The receiver chain of the NLJD pre-distorts the transmission signal and correlates the result with the response signal to differentiate between target responses and ambient interference signals. A touch screen display displays a signal strength received by the NLJDs receiver at a second harmonic frequency of the 2.4 GHz transmit signal and a signal strength received by the receiver at a third harmonic frequency of the transmit signal. A frequency swept response received by the receiver in response to the transmitted 2.4 GHz transmit signal is graphically displayed on the touch screen. The use of the 2.4 GHz band, touch screen, correlation based target differentiation and frequency swept response display improve the sensitivity and usability of the NLJD and increase the likelihood of it successfully performing its tasks.
摘要翻译： 数字扩频非线性结检测器（NLJD）利用2.4 GHz传输频带提高灵敏度，以检测较小的电子元件。 NLJD的接收机链预失真传输信号，并将结果与响应信号相关，以区分目标响应和环境干扰信号。 触摸屏显示器以2.4GHz发射信号的二次谐波频率显示由NLJD接收机接收的信号强度，以及由发射信号的三次谐波频率接收的信号强度。 接收机响应于所发送的2.4GHz发射信号而接收的频率扫描响应以图形方式显示在触摸屏上。 使用2.4 GHz频段，触摸屏，基于关联的目标区别和频率扫描响应显示提高了NLJD的灵敏度和可用性，并增加了其成功执行任务的可能性。
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7.发明授权公开(公告)号：US07058530B1
公开(公告)日：2006-06-06
申请号：US10917971
申请日：2004-08-13
IPC分类号： G06F7/02
CPC分类号： G01S7/021
摘要： An improved method and system for detecting covert surveillance devices uses frequency spectrum traces produced by a spectrum analyzer. The electromagnetic spectrum is scanned in a reference area to produce a reference frequency spectrum trace. The electromagnetic spectrum is then continuously scanned in a nearby target area to produce a peak hold frequency spectrum trace. The reference frequency spectrum trace is then subtracted from the peak hold spectrum trace to produce a comparative frequency spectrum trace. Peaks in the comparative frequency spectrum correspond to signals that are unique to either the reference area or the target area or transitory in nature. Statistical analysis is performed on subsequently obtained frequency traces to identify any changes in the frequency traces.
摘要翻译： 用于检测隐蔽监视装置的改进方法和系统使用由频谱分析仪产生的频谱图。 在参考区域中扫描电磁谱，以产生参考频谱轨迹。 然后在附近的目标区域连续地扫描电磁光谱，以产生峰值保持频谱轨迹。 然后从峰值保持频谱轨迹中减去参考频谱轨迹，以产生比较频谱轨迹。 比较频谱中的峰对应于参考区域或目标区域或临时性质特有的信号。 对随后获得的频率轨迹执行统计分析，以识别频率迹线中的任何变化。
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8.发明授权Line tracing method and apparatus utilizing non-linear junction detecting locator probe 有权线性跟踪方法和装置利用非线性结检测定位探头公开(公告)号：US07808226B1
公开(公告)日：2010-10-05
申请号：US11258944
申请日：2005-10-26
CPC分类号： G01V3/06
摘要： A method, device, and apparatus for tracing a conductive line and locating any concealed surveillance devices coupled to the line uses a signal generator to produce a test signal having a fundamental frequency which is coupled to the line under test. The test signal flowing through the line under test creates electromagnetic waves that propagate through the atmosphere away from the line. A portable locator probe is used to detect the radiated signal and thus the conductive line by detecting the magnitude of the radiated signal. As the locator probe is moved closer to the line, the amplitude of the detected signal increases. In addition, the portable locator probe detects harmonic signals radiated from nonlinear junctions coupled to the line at harmonic frequencies of the fundamental test signal. By examining the relative strengths of the second and third harmonic signals, a user can determine if the detected non-linear junction is being produced by a semiconductor or a corrosive/dissimilar metal type non-linear junction. A DC bias voltage can be used to improve the responses of any semiconductor based non-linear junctions. Any semiconductor junctions located with the probe are manually examined to determine the cause of the non-linear junction.
摘要翻译： 用于跟踪导线并定位耦合到线路的任何隐藏的监视装置的方法，装置和装置使用信号发生器来产生具有耦合到被测线路的基频的测试信号。 流经测试线的测试信号产生电磁波，其通过大气远离线路传播。 便携式定位器探头用于通过检测辐射信号的大小来检测辐射信号，从而检测导线。 当定位器探头移动到靠近线路时，检测到的信号的幅度增加。 此外，便携式定位器探测器检测从基波测试信号的谐波频率处耦合到线路的非线性结点辐射的谐波信号。 通过检查第二和第三谐波信号的相对强度，用户可以确定检测到的非线性结是否由半导体或腐蚀/异种金属型非线性结产生。 可以使用DC偏置电压来改善任何基于半导体的非线性结的响应。 手动检查位于探针上的任何半导体结，以确定非线性结的原因。
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公开(公告)号：US07630853B2
公开(公告)日：2009-12-08
申请号：US11782636
申请日：2007-07-25
IPC分类号： G01R27/28
CPC分类号： G01R31/021 , H04M1/24 , H04M1/68 , H04Q3/0087 , H04Q2213/1316 , H04Q2213/13166 , H04Q2213/1319
摘要： Line anomalies on a line under test are detected by generating a test signal at a first power level and coupling the test signal to the line under test. A response level is received from the line under test at a second and third harmonic frequency of the first test signal. A second test signal is generated at an increased power level and coupled to the line under test and a response level from the line is received at a second and third harmonic frequency of the second test signal. The process is repeated by raising the power level of the test signal until a current level supplied to the line by a test signal exceeds an acceptable threshold level. The response levels are compared to stored data to locate any line anomalies present. The stored data represents harmonic response data obtained from the same line at a previous time. A graphical or mathematical representation of the response data is produced such that the response data can be easily compared to locate any anomalies.
摘要翻译： 通过在第一功率电平上产生测试信号并将测试信号耦合到被测线路来检测被测线上的线路异常。 在第一测试信号的第二和第三谐波频率处从被测线路接收到响应电平。 第二测试信号以增加的功率电平产生并耦合到被测线路，并且在第二测试信号的第二和第三谐波频率处接收来自线路的响应电平。 通过提高测试信号的功率电平来重复该过程，直到由测试信号提供给线路的电流水平超过可接受的阈值水平。 将响应级别与存储的数据进行比较以定位存在的任何线路异常。 存储的数据表示从先前的同一行得到的谐波响应数据。 产生响应数据的图形或数学表示，使得可以容易地比较响应数据以定位任何异常。
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公开(公告)号：US20090030622A1
公开(公告)日：2009-01-29
申请号：US11782636
申请日：2007-07-25
IPC分类号： G01R31/00
CPC分类号： G01R31/021 , H04M1/24 , H04M1/68 , H04Q3/0087 , H04Q2213/1316 , H04Q2213/13166 , H04Q2213/1319
摘要： Line anomalies on a line under test are detected by generating a test signal at a first power level and coupling the test signal to the line under test. A response level is received from the line under test at a second and third harmonic frequency of the first test signal. A second test signal is generated at an increased power level and coupled to the line under test and a response level from the line is received at a second and third harmonic frequency of the second test signal. The process is repeated by raising the power level of the test signal until a current level supplied to the line by a test signal exceeds an acceptable threshold level. The response levels are compared to stored data to locate any line anomalies present. The stored data represents harmonic response data obtained from the same line at a previous time. A graphical or mathematical representation of the response data is produced such that the response data can be easily compared to locate any anomalies.
摘要翻译： 通过在第一功率电平上产生测试信号并将测试信号耦合到被测线路来检测被测线上的线路异常。 在第一测试信号的第二和第三谐波频率处从被测线路接收到响应电平。 第二测试信号以增加的功率电平产生并耦合到被测线路，并且在第二测试信号的第二和第三谐波频率处接收来自线路的响应电平。 通过提高测试信号的功率电平来重复该过程，直到由测试信号提供给线路的电流水平超过可接受的阈值水平。 将响应级别与存储的数据进行比较以定位存在的任何线路异常。 存储的数据表示从先前的同一行得到的谐波响应数据。 产生响应数据的图形或数学表示，使得可以容易地比较响应数据以定位任何异常。
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