Time correlation calculation diastimeter and measuring method

Abstract

A time correlation calculation diastimeter and a measuring method are provided. The time correlation calculation diastimeter includes a light source, a digital micromirror array DMD, a controller, a beam splitter, a lens, a semi-transmitting semi-reflecting mirror, a to-be-tested part reflective mirror, a CCD (or a point detector), a time delay unit, and a coincidence measurement logic module; the coincidence measurement logic module includes a coincidence measurement logic unit and a calculation unit. The coincidence measurement logic unit performs time coincidence measurement logic calculation on two channels of signals, and finally the distance between the to-be-tested part reflective mirror and the semi-transmitting semi-reflecting mirror is obtained. The diastimeter utilizes a time second-order correlation characteristic, can effectively reduce the distance measurement error caused by air disturbance factors, is simple in structural design and high in maneuverability, has key components all based on existing mature products, and has the characteristics of high technical maturity, relatively high realizability and the like.

Description

technical field [0001] The invention relates to a time-correlation calculation rangefinder and a measurement method, which belong to the field of distance measurement. Background technique [0002] The scale is the earliest tool used for distance measurement, but in long distances or complex environments, scale measurement becomes very difficult. During World War II, Britain first developed the ranging radar, which realized the rapid measurement of the instantaneous distance of various targets at different azimuth angles at a fixed point, and achieved a historic breakthrough in ranging technology. Later, with the development of electromagnetic and laser technology, lasers were gradually used in the field of distance measurement, and in 1961, the Hughes Aircraft Company of the United States developed the first laser rangefinder. The advantages of high resolution and strong anti-interference have been developed rapidly over a long period of time, and various forms of ranging ...

AI Technical Summary

Problems solved by technology

[0003] Although the current laser range finder can measure the distance at an ultra-long distance by virtue of the high penetrating power of the laser, it is difficult to fundamentally realize the long-distance ranging capability only by increasing the laser power and signal processing technology, and the high-power laser Use is extremely harmful to human eyes, which is not

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