公开(公告)号：US5907521A

公开(公告)日：1999-05-25

申请号：US668386

申请日：1996-06-21

申请人： Yasuharu Matsui ,  Jun Tabota ,  Keiichi Kami

发明人： Yasuharu Matsui ,  Jun Tabota ,  Keiichi Kami

IPC分类号： G01S7/521 ,  G10K11/00 ,  G01S15/00 ,  H04R17/00

CPC分类号： G10K11/004 ,  G01S7/521

摘要： An ultrasonic range finder which can effectively suppress the influence of direct transmission waves is provided. An ultrasonic range finder according to the present invention comprises a transmitting ultrasonic sensor, a receiving ultrasonic sensor, and a case which holds both ultrasonic sensors mounted and separated on the same surface, wherein a foam member fabricated to contain air bubbles is provided between the ultrasonic sensors within the case and the foam member is exposed to the surface of the case. Each of the sections of the transmitting and receiving ultrasonic sensors (which are held within the case) are covered with a second foam member and the matching layer sections of the transmitting and receiving ultrasonic sensors project beyond the surface of the case.

摘要翻译： 提供了可以有效地抑制直接传输波的影响的超声波测距仪。 根据本发明的超声波测距装置包括发射超声波传感器，接收超声波传感器和保持在同一表面上安装和分离的两个超声波传感器的壳体，其中在超声波之间设置包含气泡的泡沫构件 壳体内的传感器和泡沫构件暴露于壳体的表面。 发送和接收超声波传感器（其保持在壳体内）的每个部分被第二泡沫构件覆盖，并且发射和接收超声波传感器的匹配层部分突出超过壳体的表面。

公开(公告)号：US5812495A

公开(公告)日：1998-09-22

申请号：US668411

申请日：1996-06-21

申请人： Muneharu Yamashita ,  Jun Tabota ,  Yasuharu Matsui

发明人： Muneharu Yamashita ,  Jun Tabota ,  Yasuharu Matsui

IPC分类号： G01S7/521 ,  G01S7/527 ,  G01S7/529 ,  G01S15/10 ,  G01S15/00 ,  G01N29/00

CPC分类号： G01S7/521 ,  G01S7/527 ,  G01S7/529

摘要： An ultrasonic rangefinder capable of effectively removing high-level, directly transmitted wave components. The rangefinder can be used even at low temperatures. The rangefinder comprises an input signal-processing circuit, an output signal-processing circuit, and a gain control circuit inserted between the input and output signal-processing circuits. The output signal-processing circuit includes a reception amplification circuit and a detection circuit, the reception amplification circuit having an amplifier. The gain control circuit lowers the gain of the reception amplification circuit to raise the undetected and detected input voltage levels applied to the detection circuit. The gain control circuit comprises three control devices. The first control device is driven into conduction when its input pulse signal varies from a low level to a high level. The second control device reduces the feedback resistance of the amplifier of the reception amplification circuit in response to conduction of the first control device. In response to conduction of the first control device, the third control device controls the time for which the second control device operates.

摘要翻译： 超声波测距仪能够有效地去除高级直接传输的波浪成分。 即使在低温下也可使用测距仪。 测距仪包括输入信号处理电路，输出信号处理电路和插入在输入和输出信号处理电路之间的增益控制电路。 输出信号处理电路包括接收放大电路和检测电路，接收放大电路具有放大器。 增益控制电路降低接收放大电路的增益，以提高未检测到和检测到的施加到检测电路的输入电压电平。 增益控制电路包括三个控制装置。 当其输入脉冲信号从低电平变化到高电平时，第一控制装置被驱动导通。 第二控制装置响应于第一控制装置的导通而降低接收放大电路的放大器的反馈电阻。 响应于第一控制装置的导通，第三控制装置控制第二控制装置工作的时间。