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    • 23. 发明授权
    • Process signal collecting apparatus
    • 过程信号采集装置
    • US4506153A
    • 1985-03-19
    • US370243
    • 1982-04-20
    • Nobuo Ohno
    • Nobuo Ohno
    • G05B15/02B21B37/00F16H21/10G02B6/28G02B6/34G02B6/35G05B19/04G06F3/06G06F13/40G06F17/40G06F19/00G11B7/00H04B10/00H04B10/07H04B10/2507H04B10/27G02B5/14
    • G02B6/29368G02B6/2817G02B6/29361G02B6/4246G06F13/40G02B6/3512G02B6/355G02B6/356G02B6/3594
    • A process signal collecting apparatus comprises light transmitters (24, 25) for transmitting light pulses of the first and second wavelengths. These light pulses are transmitted through an optical fiber path (19) and light branches (401 to 416) to on/off optical switches (701 to 716). Each of the on/off optical switches is structured such that the light pulses of the first and second wavelengths are reflected therefrom when the same is in an on state while only the light pulse of the second wavelength is reflected when the same is in an off state. The reflected light pulses are detected by first and second light receivers (26, 27). A timing pulse is generated responsive to the reflected light pulse of the second wavelength. The presence or absence of the reflected light pulse of the first wavelength is discriminated as a function of the timing pulse, whereby an on state or an off state of each of the on/off optical switches is determined. The data of the decision thus obtained is stored in a memory (13) and is utilized by a central processing unit ( 1).
    • 过程信号采集装置包括用于发射第一和第二波长的光脉冲的光发射器(24,25)。 这些光脉冲通过光纤路径(19)和光分支(401至416)传输到开/关光开关(701至716)。 每个开/关光开关被构造成使得当第一和第二波长的光脉冲处于接通状态时,第一和第二波长的光脉冲被反射,而当第二波长的光脉冲处于断开状态时,仅反射第二波长的光脉冲 州。 反射光脉冲由第一和第二光接收器(26,27)检测。 响应于第二波长的反射光脉冲产生定时脉冲。 确定第一波长的反射光脉冲的存在或不存在作为定时脉冲的函数,由此确定每个开/关光开关的接通状态或断开状态。 由此获得的决定的数据被存储在存储器(13)中,由中央处理单元(1)利用。