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    • 6. 发明授权
    • Optical two-dimensional velocity and/or movement detector
    • 光学二维速度和/或运动检测器
    • US07317538B2
    • 2008-01-08
    • US11028610
    • 2005-01-05
    • Hideo WadaNobuhisa WatanabeTakayuki Taminaga
    • Hideo WadaNobuhisa WatanabeTakayuki Taminaga
    • G01B11/14
    • G01P3/366G01S17/58
    • In an optical movement information detector, light emitted from a laser diode (1) is split into a first beam (10), a second beam (11) and a third beam (12) by beam splitters (2a, 2b). The first, second and third beams are converged by a condenser lens (4) upon a surface of an object to be measured (5) to form a beam spot (13) thereon. Diffused light from the beam spot (13) is received by a photodiode (6) and an output signal of the photodiode (6) is processed by a signal processing circuit (20) including an analog-digital converter (8) and a Fourier transforming unit (9). A detecting section (21) obtains, for example, a moving velocity and a moving direction of the object based on spectrum peak frequencies obtained by the Fourier transform.
    • 在光学运动信息检测器中,从激光二极管(1)发射的光通过分束器(2a,2b)分成第一光束(10),第二光束(11)和第三光束(12)。 第一,第二和第三光束由聚光透镜(4)会聚在待测物体(5)的表面上,以在其上形成光斑(13)。 来自光束点(13)的漫射光由光电二极管(6)接收,并且光电二极管(6)的输出信号由包括模数转换器(8)的信号处理电路(20)和傅立叶变换 单位(9)。 检测部(21)基于通过傅里叶变换获得的频谱峰值频率,获得例如物体的移动速度和移动方向。