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Author: search.filters.author.Sangsuwan, ThaksinHas files: No

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    Non-destructive Fertility Detection of Multiple Chicken Eggs Using Image Processing and Convolutional Neural Network
    (2020-07-30)
    Koodtalang, Wittaya
    ;
    Sangsuwan, Thaksin
    ;
    Rerkratn, Apinai
    This paper presents a non-destructive fertility detection of multiple chicken eggs in incubation industry based on image processing technique and convolutional neural network (CNN). The aim of this research were to design and implement the system for simultaneously distinguish multi eggs infertility from fertility one. LED light source setting up for illumining the 48 eggs, consisting of both egg types and randomly placed on a tray in dark box. In addition, a pre-trained CNN is performed to classify fertile and infertile eggs. All eggs is captured and processed to extract a region of interest (ROI) for each egg, generating large ROI egg images dataset which used to train and test the CNN model. A designed system is programmed using Python, operating on Windown7-64bit supported by OpenCV and Keras. Experimental results showed the accuracies for fertile incubated eggs detection between day 7 and day 9 reaches 100%. Meanwhile, eggs location has 100% of accuracy is also observed. Hence, the proposed technique are high reliability, high accuracy system and suitable to use in real application.
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    Comparative analysis between control in the host and control in the field in terms of safety and availability for foundation fieldbus-based process control
    (2018-04-01)
    Julsereewong, Amphawan
    ;
    Whatphat, Nopthawach
    ;
    Sangsuwan, Thaksin
    ;
    Chanwutitum, Jirasak
    ;
    Thepmanee, Teerawat
    Design work of process control to provide necessary performance requirements must be based on capabilities and limitations of the technology used. This paper aims at analyzing possible safety and availability enhancements of basic process control based on Foundation Fieldbus (FF) technology in which the control function blocks can be assigned either in the host system controller, called ‘Control in the Host’ (CIH), or in the field devices, called ‘Control in the Field’ (CIF). Implementing the control loops with CIH and CIF strategies for water tank process is utilized as a case study to demonstrate the proposed analysis. The major configuration details of field devices, control strategies, and function blocks are described. Experimental results were analyzed for examining the parameter options as well as the control loop actions in response to invalid measurements to compare the safety and availability improvements between the CIH and the CIF. The proposed analysis can be useful to enable economical solutions for design phase of the FF-based control loops.
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    Petri net modeling for performance analysis of FF-based process control in terms of safety and availability enhancement
    (2017-12-13)
    Sangsuwan, Thaksin
    ;
    Whatphat, Nopthawach
    ;
    Chanwutitum, Jirasak
    ;
    Thepmanee, Teerawat
    ;
    Julsereewong, Amphawan
    In case of device and communication failures, a basic process control using Foundation Fieldbus technology can be configured to provide either safety improvement for preventing hazards or availability enhancement for minimizing production losses. The purpose of this paper is to introduce a system modeling with Petri Net technique for representing the behaviors of the proportional-integral-derivative (PID) and cascade loops with 'Control in the Field' (CIF) and 'Control in the Host' (CIH) architectures in response to instrument and communication failures. The proposed modeling is useful for performance analysis of the interested control loops in terms of safety and availability improvement. Stakeholders of both brownfield and greenfield projects in process industry sector can select a proper solution to their necessary performance requirements.
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    Safety and availability of basic process control using foundation fieldbus with control in the field - An experimental analysis
    (2017-08-01)
    Sangsuwan, Thaksin
    ;
    Thepmanee, Teerawat
    ;
    Julsereewong, Amphawan
    Detailed knowledge of how to balance between safety and availability for instruments is essential to successful design and implementation in fieldbus-based process control systems. The configuration correctness is crucial to actually obtain the benefits of digital fieldbus technology used. In actuality, a number of device parameters must be set to provide the required functionalities. This paper focuses on improving safety and availability for the proportional-integral-derivative (PID) and cascade control strategies using Foundation Fieldbus (FF) with control in the field. The aim of this paper is to analyze the logical behaviors of PID and cascade loops in two conflicting purposes for studying how different configuration options affect the interlocks between function blocks located in instruments as well as the initialization and fail-safe mechanisms in response to invalid measurements. For safety purpose, the interested control loops are configured to bring the process to a safe state in the presence of a fault. For availability purpose, the interested control loops are configured to keep the process running in the event of a failure. A water tank process is utilized as a case study for control loop implementations. Interactions between the status propagation and mode shedding for demonstrating the studied control loop behaviors are examined experimentally in Petri net models. In addition, the function block options for bumpless transfer and setpoint tracking are also described. The proved configuration method for proper operations in balancing the interests of safety and availability is proposed.
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    Communication schedule optimization for foundation fieldbus H1 segment with dual cascade control loops
    (2016-11-01)
    Sangsuwan, Thaksin
    ;
    Pongswatd, Sawai
    ;
    Julsereewong, Amphawan
    This paper proposes a method for optimizing communication schedules of dual cascade control loops within the same Foundation Fieldbus (FF) H1 segment. Integrated Harmonas-DEO host system is utilized as a configuration tool for building control strategy and scheduling macrocycle of the studied H1 segment, which consists of two level-to-flow cascade control loops. Communication schedule optimization of two different cases of assigning control functions to run in the field devices is described. Method validation is based on the use of three metrics: latency improvement, publication gap improvement, and macrocycle utilization improvement. Comparison results between the natural macrocycle and optimized macrocycle show that the proposed method can improve not only the latency of control loop but also the availability of communication bandwidth.
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    Communication schedule optimization of cascade control using foundation fieldbus
    (2016-01-01)
    Sangsuwan, Thaksin
    ;
    Pongswatd, Sawai
    ;
    Julsereewong, Amphawan
    ;
    Morioka, Yoshitsugu
    ;
    Amano, Yoshiharu
    This paper presents a technique to optimize the communication schedules generated for synchronization of Foundation Fieldbus H1 devices in cascade control loop. A level-to-flow cascade control operated by the Harmonas-DEO host system is examined as an illustrative case study. Major objectives of the optimization are not only to minimize the latency of the control loop but also to maximize the availability of the network bandwidth. The proposed technique can be applied for H1 segment macrocycle schedules performing the control functions in both of the host controller and the field devices. Three examples for optimizing communication schedules generated from different control block assignments are described. The validation of the optimization methods can be determined by using two metrics: control loop latency improvement and publication gap availability improvement. Experimental results confirm that the proposed technique works effectively to operate the studied H1 segment for cascade control without any problems.
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    Improved differential voltage-to-frequency converter for telemetry
    (2010-07-30)
    Thepmanee, Teerawat
    ;
    Julsereewong, Amphawan
    ;
    Sangsuwan, Thaksin
    An improved differential voltage-to-frequency converter (dVFC) for telemetry is presented. The proposed method employs op-amps in conjunction with current conveyors and Set-Reset latch. Surpassing the previous dVFC using only current conveyors and Set-Reset latch, the proposed configuration affords significant improvement in accuracy. Experimental results are used to verify the good operation characteristics of the proposed dVFC.