Detection System on Weak Electrical Signal in Plants

2013 ◽  
Vol 427-429 ◽  
pp. 2037-2040 ◽  
Author(s):  
Hai Wu ◽  
Li Guo Tian ◽  
Shan Hu ◽  
Zhi Liang Chen ◽  
Meng Li
Keyword(s):  
Detection System ◽  
Electrical Signal ◽  
Feature Analysis ◽  
Electric Signal ◽  
System Construction ◽  
Experiment System ◽  
Growth Status ◽  
Experimental Platform ◽  
Analysis Process ◽  
Characteristics Analysis

To achieve the accurate extraction and characteristics analysis of electrical signal in plants, the system was developed for detecting and extracting weak electrical signal in plants. As experimental platform for the extraction and detection of plants electric signal, training experiment system on the growth of plants, had done the experiments of extraction and feature analysis on plants electric signal by it, described in detail the extraction and analysis process of plants electrical signal, and also discussed the methods of anti-interference process for the system. The system construction is feasible, it has positive significance for real-time monitoring the environment factors changes and the plants growth status.

An Electrical Signal Detection System for a Microbiochip with Gold Nanoparticles

2006 ◽  
pp. 1371-1374
Author(s):  
Jae Jun Park ◽  
Dae Jin Kim ◽  
Byoung Woon Ahn ◽  
Seoung Hwan Lee ◽  
Yoo Min Ahn ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Signal Detection ◽  
Detection System ◽  
Electrical Signal

scholarly journals Analysis of the jet pipe electro-hydraulic servo valve with finite element methods

2018 ◽  
Vol 153 ◽  
pp. 06013
Author(s):  
Zhao Kaiyu ◽  
Wu Qingxun ◽  
Zhang Lijian ◽  
Yuan Zhaohui ◽  
Yang jiaqiang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Step Response ◽  
Element Analysis ◽  
Servo Valve ◽  
Analysis Process ◽  
Characteristics Analysis ◽  
Hydraulic Servo ◽  
Mathematical Relationships ◽  
The Impact

The dynamic characteristics analysis about the jet pipe electro-hydraulic servo valve based on experience and mathematical derivation was difficult and not so precise. So we have analysed the armature feedback components, torque motor and jet pipe receiver in electrohydraulic servo valve by sophisticated finite element analysis tools respectively and have got physical meaning data on these parts. Then the data were fitted by Matlab and the mathematical relationships among them were calculated. We have done the dynamic multi-physical fields’ Simulink co-simulation using above mathematical relationship, and have got the input-output relationship of the overall valve, the frequency response and step response. This work can show the actual working condition accurately. At the same time, we have considered the materials and the impact of the critical design dimensions in the finite element analysis process. It provides some new ideas to the overall design of jet pipe electro-hydraulic servo valve.

Design and Application of Distributed Solar Power Quality Detection System

2015 ◽  
Vol 742 ◽  
pp. 195-198
Author(s):  
Xue Fei Chang ◽  
Xiang Yu Lv ◽  
Zhe Yong Piao ◽  
De Xin Li
Keyword(s):  
Single Phase ◽  
Control Method ◽  
Detection System ◽  
Algorithm Design ◽  
Photovoltaic Cell ◽  
Experimental Platform ◽  
Pv Systems ◽  
Join Algorithm ◽  
Quality Detection ◽  
Single Phase Inverter

This paper studies the stand-alone PV systems, including modeling and simulation of photovoltaic cells based on a battery charge and discharge algorithm design, simulation and design portion of the push-pull boost, simulation and design of single-phase inverter system through experimental platform was build, complete functional test of each module. After considering comprehensive choice as to interfere with observation control method in this paper, based on the principle of interference observation, simulation model in Matlab, through its simulation results and did not join algorithm results were compared and found can effectively increase the output power of the photovoltaic cell.

Lifting Capacity Detection System of Tower Crane Based on LabVIEW

2013 ◽  
Vol 380-384 ◽  
pp. 860-865
Author(s):  
Ling Zhi Cao ◽  
Miao Zheng
Keyword(s):  
Data Storage ◽  
Detection System ◽  
Electrical Signal ◽  
Detection Accuracy ◽  
C Language ◽  
Graphical Language ◽  
Tower Crane ◽  
Lifting Capacity ◽  
Transmission Reduction ◽  
Machine Interface

The real-time acquisition of lifting capacity is a common problem in the course of tower crane work. Its an accurate and reliable method to use shaft pin type load cell to convert weight to electrical signal which is detected and processed in practical. Using STC89C52 as the core processor, the hardware consists of signal section modulating circuit, acquisition circuit and communication circuit; C language and LabVIEW graphical language are used to develop the system, including A/D conversion, data transmission, reduction and linear compensation, section control and data storage. As shown in the experimental results, the system improves the detection accuracy of the lifting capacity. It has friendly man-machine interface and is easy to analyse and process subsequently.

Detecting System Design of Tactile Sensor for the Elderly-Assistant & Walking-Assistant Robot

2010 ◽  
Vol 455 ◽  
pp. 37-41 ◽  
Author(s):  
Xiao Dong Zhang ◽  
X.J. Wei ◽  
J.J. Zhang
Keyword(s):  
System Design ◽  
Single Channel ◽  
Detection System ◽  
Tactile Sensor ◽  
Data Acquisition System ◽  
The Elderly ◽  
Basic Unit ◽  
Unit Selection ◽  
Experimental Platform ◽  
Movement Intention

In this paper, in order to help the growing number of elderly do away with the difficulty getting about, a walk-assistant robot for the elderly was designed with tactile and sliding senses that can perceive the movement intention and state of the elderly. And then, its key component, namely detection system of tactile and sliding sensor is designed in detail, including the layout of basic unit selection design of tactile and sliding sensor and the data acquisition system. In the end, a single channel experimental platform is built. The tactile and sliding senses of the elderly are detected and analyzed, and the design of detection system has been preliminarily verified effective. The results show the designed tactile and sliding senses detection system has the function to recognize the intention and state of the elderly movement.

scholarly journals Study on Electrophysiological Signal Monitoring of Plant under Stress Based on Integrated Op-Amps and Patch Electrode

2017 ◽  
Vol 2017 ◽  
pp. 1-7
Author(s):  
Weiming Cai ◽  
Qingke Qi
Keyword(s):  
Leaf Surface ◽  
Detection System ◽  
Stable State ◽  
High Sensitivity ◽  
Electrical Signal ◽  
Signal Acquisition ◽  
Electrical Signals ◽  
Flooding Stress ◽  
Op Amps ◽  
Electrophysiological Signal

Electrophysiological signal in plant is a weak electrical signal, which can fluctuate with the change of environment. An amplification detection system was designed for plant electrical signal acquisition by using integrated op-amps (CA3140, AD620, and INA118), patch electrode, data acquisition card (NI USB-6008), computer, and shielded box. Plant electrical signals were also studied under pressure and flooding stress. The amplification detection system can make nondestructive acquisition for Aquatic Scindapsus and Guaibcn with high precision, high sensitivity, low power consumption, high common mode rejection ratio, and working frequency bandwidth. Stress experiments were conducted through the system; results show that electrical signals were produced in the leaf of Aquatic Scindapsus under the stress of pressure. Electrical signals in the up-leaf surface of Aquatic Scindapsus were stronger than the down-leaf surface. Electrical signals produced in the leaf of Guaibcn were getting stronger when suffering flooding stress. The more the flooding stress was severe, the faster the electrical signal changed, the longer the time required for returning to a stable state was, and the greater the electrical signal got at the stable state was.

Design of Portable Gas Detector Based on DSP

2012 ◽  
Vol 430-432 ◽  
pp. 1667-1670
Author(s):  
Xiang Dong Zhu ◽  
Tao Han ◽  
Wei Lu ◽  
Lei Xing ◽  
Di Xue
Keyword(s):  
Gas Sensors ◽  
Detection System ◽  
Design Method ◽  
Practical Application ◽  
Experiment System ◽  
Temperature And Humidity ◽  
Gas Detector ◽  
Important Practical Application ◽  
Mixed Gases ◽  
Compensation Function

A new design method of gas detection system was given based on the new DSP processor TMS320F28335. The experiment system takes six metal-oxide semiconducter gas sensors as well as temperature and humidity sensors in comprising the sensor array module, followed the excellent detection principle how to choose, and choose CH4 and H2 as the test samples and use dual-BP neural-network with the temperature and humidity compensation function as the method to recognize and measure single gas and mixed gases respectively. The result shows that the measuring instrument has higher measuring accuracy and overcomes the shortcoming of other methods, and has important practical application value.

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