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2. 发明授权

US4532796A Dual transducer connection by a single cable 失效
标题翻译：双传感器通过单根电缆连接
公开(公告)号：US4532796A
公开(公告)日：1985-08-06
申请号：US548939
申请日：1983-11-07
申请人： George D. Martens , Alexander B. Smith , Thomas D. Healy
发明人： George D. Martens , Alexander B. Smith , Thomas D. Healy
IPC分类号： G01N29/22 , G01N29/34 , G01N29/36 , G01S7/52 , G01N29/04
CPC分类号： G01S7/52017 , G01N29/22 , G01N29/34 , G01N29/36 , G01N2291/102
摘要： A system for testing the fabrication of objects utilizes echo-sounding techniques. A transmit transducer and a receive transducer which provide a conversion between electric and sonic energies are acoustically coupled to the object under test. A single cable connects the transducers to a single processor which generates, receives and analyzes the signals utilized in the test process. A coupling circuit connects one end of the single cable to the two transducers and isolates a transmitted signal from a received signal so as to permit their communication by the single cable. Within the coupling circuit, a transmitted signal is communicated by a set of serially connected diodes wherein the forward voltage drop is much less than the voltage of the transmitted signal, but greater than the voltage of an incoming signal such as a reverberation of the transmitted signal or a received echo signal. The second channel of the coupling circuit provides for a series connection of a resistor with a set of parallel diodes connected with opposed polarity, the diodes being connected across the terminals of the receive transducer.
摘要翻译：用于测试物体制造的系统利用回声探测技术。提供电和声能之间的转换的发射换能器和接收换能器在声学上耦合到被测物体。单个电缆将传感器连接到单个处理器，其产生，接收和分析在测试过程中使用的信号。耦合电路将单个电缆的一端连接到两个换能器，并将发送的信号与接收到的信号隔离，以允许它们通过单个电缆进行通信。在耦合电路内，发射信号由一组串联连接的二极管传送，其中正向压降远小于发射信号的电压，但大于输入信号的电压，例如发射信号的混响或接收到的回波信号。耦合电路的第二通道提供电阻器与一组以相对极性连接的并联二极管的串联连接，二极管连接在接收换能器的端子两端。

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