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公开(公告)号：US5134277A
公开(公告)日：1992-07-28
申请号：US577796
申请日：1990-09-05
CPC分类号： G07C9/00111 , A01K11/00 , A01K29/005 , G06K7/0008
摘要： A remote data transfer system, particularly an identification system for identifying objects such as livestock, pets and containers. An interrogator generates a directional light beam which the operator can direct at a selected animal or package up to 30-14 200 meters away; and a tag transponder carried by the object is activated only on receipt of the light beam, and transmits a coded RF signal. The signal is received by the interrogator which displays the identity of the animal derived from the coded RF signal. In its "receive" mode, the tag transponder requires minimal power, thereby prolonging battery life. A short rise time light pulse (or a pulse sequence) is identified and used to switch power to the transponder. After transmission of the coded RF signal, the transponder returns to a low power draw stand-by state. The tag is also able to transmit real time information, with or without the tag identity data. Furthermore, the tag is able to accept data from a remote source and substantially simultaneously transmit data.
摘要翻译： 远程数据传输系统，特别是用于识别诸如家畜，宠物和容器之类的物体的识别系统。 询问器产生定向光束，操作者可以在距离30-1400米处的所选择的动物或包装上引导; 并且由对象携带的标签应答器仅在接收到光束时被激活，并且发送编码的RF信号。 信号由询问器接收，该询问器显示从编码的RF信号导出的动物的身份。 在“接收”模式下，标签转发器需要最小功率，从而延长电池寿命。 识别短的上升时间光脉冲（或脉冲序列），并将其用于切换到应答器的电源。 在发送编码的RF信号之后，应答器返回到低功率待机状态。 该标签还能够发送具有或不具有标签标识数据的实时信息。 此外，标签能够接收来自远程源的数据并且基本上同时发送数据。
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公开(公告)号：US5063560A
公开(公告)日：1991-11-05
申请号：US265858
申请日：1988-08-04
摘要： A spread-spectrum transmission system wherein a plurality of spread-spectrum signals are frequency division multiplexed by offsetting the center or carrier frequencies of the spread-spectrum signals by a fraction of the spectral-line spacing of the signals. The signals are generated by modulating a carrier with a pseudo-noise (PN) code signal. At a receiver, demultiplexing is carried out by mixing (42) the received multiplexed signal with a plurality of local oscillator frequencies (43) which are offset from each other in the same manner as the centre or carrier frequencies of the multiplexed spread-spectrum signals. The mixed signals are then further mixed (45) with generated PN code signals (47) corresponding to those used to generate the multiplexed spread-spectrum signals. The epoch of each generated PN code signal is then advanced or retarded in response to a respective epoch control signal (48) generated by a respective controller (46). After mixing (45) the signals are passed through respective narrowband filters (49) to select the baseband signals which are then fed to the respective controllers (46) to enable the generation of the epoch control signals (48 ). When applied to a vehicle tracking system a number of spaced receivers are utilized.
摘要翻译： PCT No.PCT / AU87 / 00020 Sec。 371日期1988年8月4日 102（e）日期1988年8月4日PCT PCT 1987年1月27日PCT公布。 公开号WO87 / 04883 日期1987年8月13日。一种扩频传输系统，其中多个扩频信号通过将扩展频谱信号的中心或载波频率偏移信号的谱线间隔的一部分进行频分复用 。 通过用伪噪声（PN）码信号调制载波来产生信号。 在接收机中，通过将接收到的多路复用信号与多个本地振荡器频率（43）混合（42）来进行解复用，该多个本地振荡器频率以与多路复用扩展频谱信号的中心或载波频率相同的方式彼此偏移 。 混合信号随后与生成多路复用扩频信号的PN码信号（47）进一步混合（45）。 响应于由相应控制器（46）产生的相应历元控制信号（48），每个产生的PN码信号的时期随后被提前或延迟。 在混合（45）之后，信号通过相应的窄带滤波器（49）以选择基带信号，然后馈送给相应的控制器（46），以便能够产生时代控制信号（48）。 当应用于车辆跟踪系统时，使用多个间隔的接收器。
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公开(公告)号：US5172075A
公开(公告)日：1992-12-15
申请号：US834230
申请日：1992-02-21
IPC分类号： H03L1/02
CPC分类号： H03L1/026
摘要： A frequency source (1) in, for example, a remote unit in a mobile communications system, is controlled to maintain a stable frequency signal. In normal operation, the frequency source (1) is frequency locked to an external reference frequency (10). A temperature detecting device (2) monitors the temperature of the frequency source, and information relating to temperature is stored in a storage device (7) together with information relating to control signals (6) applied to the frequency source (1). In the absence of the reference frequency (10), the temperature of the frequency source (1) is detected and the stored information is used to generate a control signal (6) to control the output frequency of the frequency source (1) in accordance with the detected temperature.
摘要翻译： PCT No.PCT / AU90 / 00269 Sec。 一九九二年二月二十一日 102（e）日期1992年2月21日PCT提交1990年6月22日PCT公布。 WO90 / 16113 PCT出版物 日期为1990年12月27日。例如，移动通信系统中的远程单元中的频率源（1）被控制以保持稳定的频率信号。 在正常操作中，频率源（1）被频率锁定到外部参考频率（10）。 温度检测装置（2）监视频率源的温度，与温度有关的信息与应用于频率源（1）的控制信号（6）相关的信息一起存储在存储装置（7）中。 在没有参考频率（10）的情况下，检测频率源（1）的温度，并且使用存储的信息来产生控制信号（6），以根据频率源（1）的输出频率来控制 检测温度。
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4.发明授权Locator for source of electromagnetic radiation having unknown structure or orientation 失效具有未知结构或取向的电磁辐射源的定位器
公开(公告)号：US4328548A
公开(公告)日：1982-05-04
申请号：US137287
申请日：1980-04-04
摘要： Apparatus for determining the position of a source of electromagnetic radiation relative to a remote object is disclosed. A multicomponent radiating means of unknown orientation is provided having components centered about the origin of the source. A plurality of electrical signals are applied to the components of the multicomponent source to generate a plurality of electromagnetic fields. The electromagnetic fields are multiplied and thus are distinguishable from one another. A multicomponent receiving means is disposed on the remote object. The multicomponent receiving means is provided with at least three orthogonal components for detecting and measuring components of the electromagnetic fields transmitted from the source. The source and receiving means are adapted for operation at a separation distance sufficient to insure that the far-field components of the electromagnetic fields received by the receiving means are substantially greater in magnitude than the near-field components of the fields received by the receiving means. Analyzing means is associated with the receiver for converting the received components of the electromagnetic fields into source position relative to the remote object, and the relative orientation of the remote object, without a priori knowledge of the orientation of the sensor or the relative orientation of its components. The analyzing means operates open-loop with respect to the source and determines source position orientation with at least one ambiguous combination of orientation or position.
摘要翻译： 公开了用于确定相对于远程物体的电磁辐射源的位置的装置。 提供具有未知取向的多组件辐射装置，其具有以源的原点为中心的部件。 多个电信号被施加到多组分源的组件以产生多个电磁场。 电磁场相乘，因此可以彼此区分。 多组件接收装置设置在远程对象上。 多组件接收装置设置有至少三个正交分量，用于检测和测量从源发送的电磁场的分量。 源和接收装置适于在足以确保由接收装置接收的电磁场的远场分量在数量上大大高于由接收装置接收的场的近场分量的间隔距离 。 分析装置与接收机相关联，用于将接收到的电磁场分量转换成相对于远程物体的源位置，以及远程物体的相对取向，而没有传感器取向或其相对定向的先验知识 组件。 分析装置相对于源操作开环，并且使用取向或位置的至少一个不明确的组合来确定源位置取向。
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