Conditioning circuit of Doppler signal under strong noise background

A technology of Doppler signal and conditioning circuit, applied in the field of conditioning circuit of Doppler signal under the background of strong noise, can solve the problems of lack of guarantee of technical service, lack of systematic research, high price of instruments, etc., so as to filter out high-frequency interference. , the effect of improving accuracy and quality

Active Publication Date: 2019-03-22
安徽蓝盾光电子股份有限公司
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  • Abstract
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Problems solved by technology

[0002] Due to the lack of systematic research and key technology research, my country's train speed measurement system mainly adopts traditional speed measurement methods. High-performance train speed measurement instruments have long been monopolized by advanced countries such as Europe, America and Japan. high

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  • Conditioning circuit of Doppler signal under strong noise background
  • Conditioning circuit of Doppler signal under strong noise background
  • Conditioning circuit of Doppler signal under strong noise background

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Embodiment Construction

[0022] Such as figure 1 As shown, the conditioning circuit of the Doppler signal under the strong noise background includes a preamplification unit 2, a real-time fault detection unit 3, and a signal filtering unit 4, wherein the signal filtering unit 4 includes a filtering conditioning circuit and a dual-antenna working mode. Adaptive filter conditioning circuit under single-antenna working mode, the radar antenna 1 is connected to the signal input terminals of the preamplifier unit 2 and the real-time fault detection unit 3 respectively, and the signal output terminal of the preamplifier unit 2 is connected to the signal of the signal filter unit 4 The input end is connected, and the signal output end of the signal filter unit 4 and the real-time fault detection unit 3 is connected with the signal input end of the signal processing unit 5, and the signal output end of the signal processing unit 5 is connected with the communication and the external interface 6; the weak outpu...

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Abstract

The invention discloses a Doppler signal conditioning circuit in a strong-noise background, which comprises a pre-amplifier unit, a real-time fault detection unit and a signal filtering unit. The signal filtering unit comprises a filtering conditioning circuit in a dual-antenna working mode and an adaptive filtering conditioning circuit in a single-antenna working mode. Weak Doppler signals output by radar antennas first pass through the pre-amplifier unit. Meanwhile, the working states of the radar antennas are detected in a real-time manner. After being amplified, the signals are further filtered and conditioned and further sent to a rear stage for sampling and operational processing. The conditioning circuit can extract weak Doppler signals from a strong-noise background and acquire useful signals with a high signal to noise ratio. Rear-stage signal processing errors can be greatly decreased. The velocity measurement precision can be further improved.

Description

technical field [0001] The invention relates to the field of radar speed measuring sensors, more specifically, the invention relates to a Doppler signal conditioning circuit under strong noise background. Background technique [0002] Due to the lack of systematic research and key technology research, my country's train speed measurement system mainly adopts traditional speed measurement methods. High-performance train speed measurement instruments have long been monopolized by advanced countries such as Europe, America and Japan. high. During the driving process of the locomotive, the Doppler signal will be interfered by various noises due to factors such as vibration and environmental changes. Extracting a useful signal with a high signal-to-noise ratio from strong noise is important for subsequent signal processing. Critical. Contents of the invention [0003] The object of the present invention is to provide a conditioning circuit for obtaining Doppler signals with a ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G01S7/40
CPCG01S7/02G01S7/40
Inventor 钱江朱宝平张帅崔莹宝
Owner 安徽蓝盾光电子股份有限公司
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