A low cost smart irrigation control system

2015 ◽  
Author(s):  
Chandan Kumar Sahu ◽  
Pramitee Behera
Keyword(s):  
Control System ◽  
Low Cost ◽  
Irrigation Control

scholarly journals An Automatic Irrigation Control System for Soilless Culture of Lettuce

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1692 ◽  
Author(s):  
Zhigang Liu ◽  
Qinchao Xu
Keyword(s):  
Control System ◽  
Root Zone ◽  
Low Cost ◽  
Manual Control ◽  
Growth Stages ◽  
Irrigation Strategy ◽  
Irrigation Water Use ◽  
Irrigation Control ◽  
Intelligent Irrigation ◽  
Control Irrigation

To achieve precise measurement of moisture content in the substrate and intelligent water-saving irrigation, a simple and low cost automatic irrigation control system based on ZigBee wireless network has been developed. A software with irrigation strategy was proposed based on the models of substrate wetting pattern, lettuce root zone and the evapotranspiration. The system could detect substrate moisture in real-time and irrigate automatically according to the threshold of substrate and the irrigation strategy. The average fresh weight per plant under intelligent irrigation are 16.60% and 11.37% higher than manual control irrigation at least in different growth stages in spring and summer, the average drainage rate of intelligent irrigation is 16.08% and 17.06% smaller than manual control irrigation in spring and summer, and the irrigation water use efficiency of intelligent irrigation is 68.03% and 98.61% higher than manual control irrigation in spring and summer. The results show that the system is a promising tool for scientific and rational irrigation decision.

scholarly journals Low Cost Design of Automated Drip Irrigation System with GSM

2019 ◽  
Vol 8 (4) ◽  
pp. 8077-8082
Keyword(s):  
Control System ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Low Cost ◽  
Cost Effective ◽  
Effective Control ◽  
Irrigation Technology ◽  
Flow Through ◽  
Irrigation Control ◽  
Fail Safe

This paper is about an automatic irrigation control system which is cost effective and can be used for irrigation by a farmer. Today’s industrial automation and controlling of machine is high in cost and not suitable for a farming field. So, here we design a smart drip irrigation technology with effective control system in low cost. The voltage monitoring unit informs the farmer about the power supply conditions on the field. The aim of this study, is to control the motor automatically, and decide the direction of the water flow through valves, based on the inputs from the farmer and also with the collective inputs from the sensors, which finally notify instantly about the happenings and conditions of the field. It operates under low hardware cost by distributing irrigation to crops by elevation change and gravity. The soil moisture and amount of flow of water in each sector are major consideration to design a fail-safe system for a variety of crops planted at a time.

Automatic Irrigation Control System for Soilless Culture Based on Feedback from Drainage Hydrograph

2017 ◽  
Vol 33 (4) ◽  
pp. 531-542 ◽  
Author(s):  
Daniel Rodríguez ◽  
Juan Reca ◽  
Juan Martínez ◽  
Miguel Urrestarazu
Keyword(s):  
Control System ◽  
Low Cost ◽  
Irrigation Management ◽  
Irrigation Scheduling ◽  
Soilless Culture ◽  
Proportional Integral Derivative ◽  
Tomato Crop ◽  
Proportional Integral ◽  
Irrigation Application ◽  
Irrigation Control

Abstract. In a soilless culture, water and nutrients must be frequently and precisely applied due to the reduced volume and low water holding capacity of the substrate. We describe a low-cost and efficient control system for the irrigation management of soilless culture based on an irrigation tray. Both irrigation and drainage volumes from the irrigation control tray are measured automatically. The proposed irrigation scheduling options were based on applying both variable timing and amounts. A Proportional Integral Derivative (PID) algorithm was used to establish the irrigation timing option while two different irrigation application options, based on measurements from the drainage hydrograph, were developed and tested. A field test performed on a tomato crop was carried out to assess the performance of the two irrigation application options. Both irrigation algorithms performed well as they fitted the leaching fraction for every irrigation event to the target value. The fruit yield and quality were comparable to results obtained from the control treatment of the tomato crop. The designed low-cost irrigation control system, if implemented on commercial farms, could prove to be economically very beneficial. Keywords: Automation, Drainage hydrograph, Irrigation control tray, Irrigation scheduling, Proportional-Integral-Derivative (PID) controller, Substrate culture.

scholarly journals Intelligent Control Wheelchair Using a New Visual Joystick

2018 ◽  
Vol 2018 ◽  
pp. 1-20 ◽  
Author(s):  
Yassine Rabhi ◽  
Makrem Mrabet ◽  
Farhat Fnaiech
Keyword(s):  
Control System ◽  
Intelligent Control ◽  
Visual Recognition ◽  
Low Cost ◽  
Control Device ◽  
Control Technique ◽  
Hand Gesture ◽  
Functional Rehabilitation ◽  
Number Of Patients ◽  
Real Patients

A new control system of a hand gesture-controlled wheelchair (EWC) is proposed. This smart control device is suitable for a large number of patients who cannot manipulate a standard joystick wheelchair. The movement control system uses a camera fixed on the wheelchair. The patient’s hand movements are recognized using a visual recognition algorithm and artificial intelligence software; the derived corresponding signals are thus used to control the EWC in real time. One of the main features of this control technique is that it allows the patient to drive the wheelchair with a variable speed similar to that of a standard joystick. The designed device “hand gesture-controlled wheelchair” is performed at low cost and has been tested on real patients and exhibits good results. Before testing the proposed control device, we have created a three-dimensional environment simulator to test its performances with extreme security. These tests were performed on real patients with diverse hand pathologies in Mohamed Kassab National Institute of Orthopedics, Physical and Functional Rehabilitation Hospital of Tunis, and the validity of this intelligent control system had been proved.

scholarly journals Dispute Settlement Practices through the Religious Court’s Mobile Court (Sidang Keliling)

FIAT JUSTISIA ◽  
2020 ◽  
Vol 14 (3) ◽  
pp. 287
Author(s):  
Hazar Kusmayanti ◽  
Sherly Ayuna Puteri
Keyword(s):  
Control System ◽  
Dispute Settlement ◽  
Low Cost ◽  
Effective Control ◽  
Circuit Court ◽  
Procedural Law ◽  
To Come ◽  
Circuit Courts ◽  
Religious Courts

This research is attempted to analyze the practices of mobile court and compare it with others. Based on the results of the study, the conclusions that can be obtained are that the implementation of the circuit court conducted at the Tasikmalaya District Religious Court has fulfilled several principles of civil procedural law, namely fast, simple and low cost. Among them when people who experience obstacles to come to the court office for reasons of distance, transportation and costs of the court come directly to the location, the bureaucracy is not complicated meaning that the implementation of the trial must be completed no later than 4 times the hearing, and the existence of an effective control system and various elements. Obstacles in the conduct of circuit courts include no standard guidelines for the holding of circuit courts, not all cases registered by residents are resolved in circuit courts, limited budgets, cases that have not been heard are all without prodeo, facilities and infrastructure, and not all religious courts hold circuit courts.

scholarly journals A low-cost ac-dc rectifier for variable-speed wind energy conversion systems

2021 ◽  
Author(s):  
Zhenhan. Luo
Keyword(s):  
Control System ◽  
Low Cost ◽  
Synchronous Generator ◽  
Voltage Source ◽  
Current Loop ◽  
Variable Speed ◽  
Synchronous Generators ◽  
Wind Turbine System ◽  
Synchronous Reference Frame ◽  
Energy Conversion Systems

In this thesis, a novel AC-DC rectifier is adopted to convert the variable AC voltages from wind generator to a constant dc-link voltage. A DC-AC inverter is used to transfer the energy to fixed ac grid as well as maintain dc-link voltage constant. The rectifier is connected to the generator, which has two sets of three-phase windings. Electrical exited or permanent magnetic synchronous generators are suitable for this rectifier. The AC-DC rectifier features low cost, low power losses and simple control structure. The major content of this thesis consists of four parts. The first part investigates the operation of the AC-DC rectifier. The analysis illustrates the current paths in the rectifier and the remarkable voltage-boosting capability. A simulation model of the converter is built and verified. The second part models the synchronous generator with two sets of windings. The model is developed in the d-q synchronous reference frame. The simulation results from the model are verified by the experimental results.Then the third part is the design of the control system, which involves the generator, the AC-DC rectifier and constant dc-link voltage source. The control system composites of the inner current loop and the outer speed loop. The control system achieves the variable-speed operation of the generator and the regulation of the dc-link current. Finally, a prototype of wind turbine system is established in the lab to verify the analysis of rectifier, synchronous generator and control system design. The steady-state and transient responses of the wind system are compared. Simulation and experiment verify the analysis in this thesis.

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