Distance measuring system based on pseudo thermal light second-order relevance
A second-order correlation and distance measurement system technology, which is applied in radio wave measurement systems, measurement devices, electromagnetic wave reradiation, etc., can solve the problem of distance measurement that is not suitable for long distances, detection signal bandwidth limitation, distance measurement accuracy, and multi-value difficulties in identifying
Inactive Publication Date: 2013-06-19
SHANGHAI JIAO TONG UNIV
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However, interferometric ranging can only measure relative distances. To perform absolute interferometric measurements at long distances, the identification of multi-value is very important but very difficult, so interferometric ranging is not suitable for long-distance ranging
[0006] Chaotic laser ranging originated from the use of the characteristics of the impulse-like function of the chaotic signal correlation curve. In 2001, K. Myneni et al. first proposed the use of chaotic laser pulse sequences for ranging research. They used the chaotic laser generated by optical feedback semiconductor lasers. The pulse sequence realizes the distance measurement of the target, but the bandwidth of the detection signal limits its ranging accuracy
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[0026] Such as figure 1 As shown, in a preferred embodiment of the present invention, the ranging system based on the pseudothermal-optic second-order correlation includes a pseudothermal light source module, a beam splitter, a detection module, a transmitting device, a receiving device and a ranging module, and the detection The module includes a detector 1 and a detector 2, wherein the pseudothermal light source module emits a beam, and the beam is divided into two paths by the beam splitter, one of which is received by the detector 1; The device collimates and expands the beam and illuminates the target object, and the reflected echo beam of the target object is received by the receiving device and input to the detector 2; the output of the detector 1 is used as a reference signal photon, and the detector 2 as measurement signal photons, the output of the detector 1 and the output of the detector 2 are sent to the ranging module, and the ranging module outputs the distance ...
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The invention discloses a distance measuring system based on pseudo thermal light second-order relevance. The distance measuring system based on the pseudo thermal light second-order relevance comprises a pseudo thermal light source, a beam splitter, a detection module, a transmitting device, a receiving device and a distance measuring module, wherein the distance measuring module measures distance by using a distance measuring method in accordance with measurement and curve fitting. The distance measuring system based on the pseudo thermal light second-order relevance has the characteristics of high accuracy and high environmental interference resistance, remote and high-accuracy distance measurement can be realized, and measurement dead zones are eliminated.
Description
technical field [0001] The invention relates to a continuous optical correlation ranging system, in particular to a ranging system based on pseudothermo-optical second-order correlation. Background technique [0002] Continuous light correlation ranging is based on continuous light ranging technology and correlation technology, adhering to the characteristics of laser ranging monochromaticity, good coherence, strong directionality, etc., and has the characteristics of correlation technology anti-environmental interference. Common continuous optical correlation ranging includes phase ranging, pseudo-random code ranging, interferometric ranging and chaotic laser ranging. [0003] The phase laser ranging method indirectly measures the signal propagation time by measuring the phase change produced by the continuous modulation signal propagating back and forth over the distance to be measured, so as to obtain the measured distance. The phase method laser ranging system uses the ...
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Inventor 陈霄祥朱俊石剑虹曾贵华
Owner SHANGHAI JIAO TONG UNIV