The research on signal processing of capacitance-based perimeter alarm system based on wavelet algorithm

2017 ◽  
Author(s):  
Rong Liu ◽  
Shijia Liu ◽  
Jian Yang ◽  
Bo Ruan ◽  
Bikai Liao ◽  
...  
Keyword(s):  
Signal Processing ◽  
Alarm System ◽  
Wavelet Algorithm

Application of Wavelet Analysis in Nondestructive Testing of Steel and Iron Materials and DSP Implementation

2013 ◽  
Vol 321-324 ◽  
pp. 1270-1273
Author(s):  
Pei Yue Liu ◽  
Jun Fen Wang ◽  
Bao Qiu Ma
Keyword(s):  
Signal Processing ◽  
Nondestructive Testing ◽  
Wavelet Analysis ◽  
Digital Signal Processing ◽  
Digital Signal ◽  
Analog Signal ◽  
Testing Device ◽  
Dsp Implementation ◽  
Testing Signal ◽  
Wavelet Algorithm

Aiming at improving the unideal testing result by means of analog signal processing, wavelet analysis is introduced in the nondestructive testing of steel and iron materials, based on the characteristics of electromagnetic nondestructive testing signal. According to the requirement of wavelet algorithm for hardware, the advantages of DSP, digital signal processing function and high calculating speed, design scheme of the steel electromagnetic nondestructive testing device is proposed in this paper. Experiments show that this method can extract detection signal effectively.

Design of Alarm System with Pyroelectric Infrared Sensor

2011 ◽  
Vol 110-116 ◽  
pp. 4883-4887
Author(s):  
Xiao Yan Shang ◽  
Jian Wu ◽  
Xing Wang
Keyword(s):  
Signal Processing ◽  
Fresnel Lens ◽  
Alarm System ◽  
Infrared Sensor ◽  
Reliable Performance ◽  
Working Principle ◽  
Signal Processing Circuit ◽  
The Voice ◽  
Processing Circuit

Based on pyroelectric infrared sensor working principle, the passive pyroelectric infrared alarm system is designed, which is mainly used for safety of residence house to detect whether outsiders enter or not. This system is made of pyroelectric infrared sensor, Fresnel lens and monitoring circuits. The concealment of infrared is well applied on the circuits , amplifying and filtering circuit , infrared signal processing circuit are designed, then the voice chip is utilized to simulate alarm voice for warning thieves and burglars .After many experiments, This system has sensitive response , high anti-interference ability and safe and reliable performance.

Design of Monitoring and Alarm System for the Ship’s Engine Room

2011 ◽  
Vol 268-270 ◽  
pp. 1663-1668
Author(s):  
Chang Shun Wang ◽  
Hai Rong Xiao ◽  
Wei Gang Pan ◽  
Yao Zhen Han
Keyword(s):  
Signal Processing ◽  
Can Bus ◽  
Physical Layer ◽  
Alarm System ◽  
Interface Circuit ◽  
Engine Room ◽  
Protection Circuit ◽  
Signal Processing Circuit ◽  
Processing Circuit

A monitoring and alarm system for the ship’s engine room based on CAN bus is introduced in this paper. The paper describes the sensors and signal processing circuit used in the monitoring and alarming system in detail. Analog isolated measurement modules is designed in order to avoid damage to the interface circuit of the system. To get the greatest possible reliability in communication, protection circuit is increased to the CAN bus and implemented on the CAN bus physical layer redundancy.

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