Because the pulse of the laser rangefinder is relatively narrow, the maximum pulse width is only about 20 nanoseconds, and the sampling frequency of the analog-to-digital converter is relatively high, which increases the difficulty of digitization. In addition, the analog signal processor can only detect a single pulse echo signal, and it is difficult to perform constant false alarm processing. The relevant information between pulses is not fully utilized. The analog signal processor can only work under the condition of a large signal-to-noise ratio. When it is about 9 to 10, the ranging distance of the laser rangefinder will be greatly reduced. How to improve the measurement distance and accuracy of laser rangefinders has always been a difficult problem.

Now the laser ranging telescope with high-digital digitization and high-digital DSP processing function has passed the laboratory test and put into use test, and has reached all the required performance indicators. The measurement distance of the laser rangefinder is improved. The composition of the digital laser rangefinder is divided into the following three parts: a 500MHz high-speed analog-to-digital converter, the second is digital signal processing (DSP), and the third is various interface circuits.

The analog laser rangefinder can only check a single laser pulse, and use the voltage comparison method; first confirm that the echo voltage of a variety of interface circuits is greater than the threshold value, and it can be determined that it is a target, if not, it is not a target. The digital laser rangefinder can perform multi-pulse detection in addition to single-pulse detection. For a single digital laser rangefinder, the echo signal can be processed by matched filtering, CFAR detection, etc., which can improve the echo signal. Detection accuracy.

Although there is still some distance between the top level of the laser rangefinder and the international level, the overall domestic product level is still enough to be classified as a high-quality product.