The invention provides an optical
signal positioning device, a method and a
system and belongs to the photoelectric
signal technology field. The device comprises an optical
signal sending module and an optical
signal processing module. The optical signal sending module and the optical
signal processing module form
optical coupling. The optical signal sending module is installed on an object to bemeasured. The optical signal sending module is used for determining whether the
moving speed of the object to be measured satisfies a preset condition. If the
moving speed of the object to be measuredsatisfies the preset condition, through positioning a
light source, positioning light is emitted, and through at least two light sources,
flare light is emitted. The optical
signal processing moduleis used for acquiring the positioning information of the object to be measured according to the collected poisoning light and determining the position change condition of the object to be measured according to the at least two paths of collected
flare light and the positioning information. The optical signal sending module emits the
flare light according to the
moving speed so as to realize the control of
power consumption. The optical signal
processing module collects the flare light sent by the optical signal sending module on the object to be measured so that the object to be measured is accurately identified, positioned and tracked in middle and long distances.