System for improving pulse emission frequency of ground penetrating radar

Abstract

The invention provides a system for improving the pulse transmitting frequency of a ground penetrating radar. The system comprises a power module, a programmable digital circuit module, a transmitting module and a receiving module, the programmable digital circuit module is used for transmitting a pulse trigger signal to the transmitting module; the transmitting module is used for triggering the pulse generation channel to generate a pulse waveform and transmitting the pulse waveform; the receiving module is used for receiving the pulse waveform signal transmitted by the transmitting module so as to transmit the pulse waveform to the programmable digital circuit module for data processing; the programmable digital circuit module is also used for controlling the generation time of the pulse trigger signal so as to synchronously control the generation time of a plurality of pulse waveforms in the transmitting module; by combining the pulse waveforms under the low repetition frequency, the pulse waveform with the higher repetition frequency is equivalently obtained at the output end of the transmitting module, and the requirement of the ground penetrating radar for general survey of road infrastructures can be better met.

Description

technical field [0001] The invention relates to the technical field of ground penetrating radar, in particular to a system for increasing the pulse transmission frequency of ground penetrating radar. Background technique [0002] The transmitter of the ground radar transmits electromagnetic waves at a pre-agreed repetition frequency in the time domain, and the receiver opens the sampling gate at the corresponding repetition frequency to receive the reflected signal; the higher the repetition frequency of the transmitted electromagnetic wave, the more information that can be collected per unit time. The more; when ground penetrating radar is applied to the general survey of road infrastructure, the collected data can be used to generate continuous profiles; the higher the repetition frequency of the transmitted shock pulse, the more sampling points per unit distance, and the higher the accuracy of the detection data ;Under the same detection accuracy, the higher the repetitio...

AI Technical Summary

Problems solved by technology

[0003] In current ground penetrating radar transmitters, the traditional MARX cascade circuit based on avalanche tubes can generate high-power shock pulses, but the repetition rate is low. As the number of tube stages increases, the upper limit of the repetition frequency will be lower; for example, the traditional MARX circuit The maximum repetition frequency can only reach about 50KHz, and the repetition frequency of some improved circuits can only be <300KHz, which seriously limits the detection accuracy and detection efficiency under high-speed applications; at the same time, with the increase of repetition frequency, the equivalent duty cycle The power consumption of the transistors in the avalanche MARX circuit is also increasing, the jitter of the output pulse amplitude is also increasing, and the impact on the long-term operation of the equipment is becoming more and more obvious, so it is urgent to improve

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