Pulse laser ranging time discriminator based on differential signal

Abstract

The invention discloses a pulse laser ranging time discriminator based on a differential signal, which comprises a differential amplifier circuit (1) and a voltage comparison circuit (2) connected insequence and in series. The input terminal of the differential amplifier circuit (1) is connected with a pulse input signal Vi(t), the output terminal of the differential amplifier circuit (1) is connected with the input terminal of the voltage comparison circuit (2), and the output terminal of the voltage comparison circuit (2) outputs a digital level signal V0(t). The pulse laser ranging time discriminator based on a differential signal of the invention has the advantages of good noise interference suppression performance, small temperature drift and high time discrimination accuracy.

Description

technical field [0001] The invention belongs to the technical field of pulse laser ranging equipment, in particular to a differential signal-based pulse laser ranging time discriminator with small time wobble error and high ranging accuracy. Background technique [0002] In today's society, with the rapid development of the national economy, the number of automobiles has risen sharply, and the safety of automobile driving has been paid more and more attention. Therefore, peripheral research around intelligent transportation has become popular. The distance measurement system plays an important role in the intelligent transportation system. Whether it is the reversing radar control or the front collision avoidance system, precise distance measurement is required. Pulsed lasers use lasers as light sources and lasers as carriers. According to the time-of-flight principle, the distance is measured by detecting the time difference between the laser emission pulse and the laser ec...

AI Technical Summary

Problems solved by technology

The problems of the above-mentioned time discriminator include: 1. The circuit is complex; 2. Although the dual-channel time discriminator effectively solves the amplitude time wandering, it does not solve the time jitter caused by noise interference.

When measuring long-distance targets, the echo pulse is often very weak, the signal-to-noise ratio is low, the time jitter caused by interference is obviously affected, and the accuracy of time identification is reduced

[0006] Therefore, the problems existing in the prior art are: due to the large time sloshing error caused by the time discriminator due to noise interference, the ranging accuracy of the pulsed laser ranging equipment is low when measuring a long-distance target; at the same time, there is a temperature drift

Images