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Water area public security monitoring device

A monitoring device and security technology, applied in multi-terminal pair network, frequency selection two-terminal pair network, improved amplifier to reduce temperature/power voltage changes, etc., can solve problems such as signal waveform distortion, reduce signal waveform distortion and improve accuracy Effect

Pending Publication Date: 2020-09-08
铁道警察学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a water area public security monitoring device, which effectively solves the serious problem of signal waveform distortion transmitted to the controller

Method used

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  • Water area public security monitoring device
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  • Water area public security monitoring device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, the water area security monitoring device comprises an information collection module, a controller, a communication module, and a monitoring platform. The security information in the water area collected by the information collection module is transmitted to the controller, and the controller transmits the information to the monitoring platform through the communication module. The security information in the water area collected by the acquisition module is transmitted to the controller, and a low-noise amplification module, an active noise reduction module, an anti-jamming module, and a wave noise acquisition module are also connected. The low-noise amplification module uses the operational amplifier AR1 as the core. A low-noise amplifier circuit receives public security information in the water area, and only allows the frequency component of the received and corrected public security information in the water area to pass through. The wave noise acquisiti...

Embodiment 2

[0022] Embodiment 2, on the basis of Embodiment 1, the active noise reduction module passes the received output signal of the low noise amplification module through the resistor R6-resistor R8, resistor R13, resistor R14, operational amplifiers AR2 and AR3, and the capacitor C3 connected in series The notch amplifier composed of the variable capacitance diode DC1, the capacitor C4 in series and the variable capacitance diode DC2 is amplified, so that only the frequency signals other than the notch frequency are amplified, and the frequency of the notch is the frequency of the wave noise signal of the modified linkage tuning Specifically, when the tuning frequency of the tuning circuit in the wave noise acquisition module changes, the functions of the linkage capacitors C3 and C4, and the voltage after the impedance division is pulled up by the resistor R12, and the diode D4 is unidirectionally conductive and then added to the varactor diode DC2. Negative pole, the other way is ...

Embodiment 3

[0023] Embodiment 3, on the basis of Embodiment 1, the low-noise amplification module adopts an operational amplifier

[0024]The first low-noise amplifier circuit composed of AR1, resistor R1-resistor R5, capacitor C1, capacitor C2, and electrolytic capacitors E1 and E2 receives the public security information in the water area output by the information acquisition module, filters out-of-band noise, and only allows received corrected The frequency components of the public security information in the water area pass through, wherein the capacitor C1 and the resistor R2 form a high-pass filter, the capacitor C2 and the resistor R5 form a low-pass filter, and the joint action also constitutes the first band-pass filter. In order to obtain complete public security information, The high and low pass frequency range setting is wider than the frequency component range of the public security information in the water area. The operational amplifier AR1, resistor R3, and resistor R4 for...

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Abstract

The invention discloses a water area public security monitoring device. A low-noise amplification module adopts a first low-noise amplification circuit to receive public security information in a water area; only the frequency component of the received corrected public security information in the water area is allowed to pass through; a sea wave noise acquisition module adopts a second low-noise amplification circuit to amplify a sea wave noise signal; after feedback tuning, a frequency signal which resonates with the sea wave noise signal is output; the amplitude of the sea wave noise signalis output after detection; the active noise reduction module amplifies the received output signal of the low-noise amplification module through a notch amplifier; wherein the frequency of the trappedwave is the frequency of the corrected linked tuned sea wave noise signal; the amplitude of the sea wave noise signal is added to the notch amplifier to be offset, the public security information in the water area without the sea wave noise interference signal is recovered, the problem of signal waveform distortion is greatly reduced, then the signal enters the anti-interference module, large-amplitude negative interference is eliminated, frequency selection and following are conducted, the signal is transmitted to the controller, and the precision of the actual public security information isimproved.

Description

technical field [0001] The invention relates to the technical field of water areas, in particular to a monitoring device for public security in water areas. Background technique [0002] In recent years, with the introduction of national strategies such as the Yangtze River Economic Belt and the Yellow River Basin Ecological Protection and High Quality, my country has gradually increased its emphasis on the safety of rivers, lakes and other waters. Pay more and more attention. Most of the current public security patrol boats are patrol boats with a single hull structure when performing tasks. [0003] In view of the huge waters of our country, complex water conditions, and serious security situations, patrol equipment (such as patrol ships, drones, etc.) is usually equipped with an information collection module to detect public security information in the waters to which it belongs (collected by security detection equipment such as cameras) Image screen, radar, photoelectri...

Claims

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Application Information

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IPC IPC(8): H03F1/30H03H11/04
CPCH03F1/30H03H11/04
Inventor 刘宝真高燕飞李盛乐有金
Owner 铁道警察学院
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