Sairag Sa-adprai and Bunyong Rungroungdouyboon, "The development of Exercise Machine for Training Natural Sit to Stand Movement", The 9th TSME International Conference on Mechanical Engineering, 11-14 December 2018, ​Phuket, Thailand

Abstract
              Reduced lower limb strength in elderly is related with poor ability to functional activities, increased risk of fall, recurrent falls, and mortality. Strengthening exercise for quadriceps like stand from a seat without assistance from the upper limbs is required in elderly. For the elderly, repeated sit to stands may be sufficiently challenging to improve lower limb strength and reduce functional limitations. The researchers have developed an innovative Sit to Stand Trainer (STST), a device that assists user to stand that offers variable levels of mechanical support between 20- 50 kg. The STST uses a linear actuator and tension spring including parallel mechanism to produce the support system. This research validated the STST in four healthy people, this research compared kinetics (Motion Analysis) of STST at 50 % of support level to natural, unassisted Sit to Stand movement (No STST). The resulting of trunk, hip, knee and ankle angles in STST are similar to No STST experimental condition. Based on these results, this research can be concluded that this STST facilitates natural of​

Supachai Vorapojpisut, “Model-based Design of IoT/WSN Nodes: Device Driver Implementation”, The Joint 11th International Conference on Embedded Systems and Intelligent Technology (ICESIT 2018) and 9th International Conference on Information and Communication Technology for Embedded Systems (IC-ICTES 2018), May 7-9, 2018

กษิดิ์เดช เกษมณี และ บรรยงค์ รุ่งเรืองด้วยบุญ “การออกแบบและพัฒนาสายการปอกผลมะพร้าวอ่อน : Design and Development Line Peeling Young Coconut Machine ” การประชุมวิชาการระดับชาติพะเยาวิจัย ครั้งที่ 7, 25-26 มกราคม 2561 ณ มหาวิทยาลัยพะเยา จังหวัดพะเยา

                                                                           บทคัดย่อ
            มะพร้าวน้ำหอมเป็นพืชเศรษฐกิจที่มีมูลค่าส่งออกหลายร้อยล้านบาทต่อปี และประเทศไทยนั้นถือว่าเป็นประเทศที่มีการส่งออกของผลผลิตทางการเกษตรเป็นอันดับต้นๆของโลก ซึ่งหนึ่งในผลิตภัณฑ์นั้นคือผลมะพร้าวน้ำหอมอ่อนปอก ซึ่งปัญหาของผลมะพร้าวอ่อนปอกของไทยที่ใหญ่ที่สุดคือ กำลังการผลิตที่ไม่เพียงพอต่อความต้องการของผู้บริโภคอันเนื่องมาจากปัญหาการขาดแคลนแรงงานในการปอกผลมะพร้าวอ่อนในโรงงาน และยังมีปัญหาเรื่องการขนส่ง เนื่องจากมะพร้าวเป็นผลไม้ที่มีน้ำหนักมาก ถึงแม้ว่าปอกเปลือกออกแล้ว แต่ก็ยังมีน้ำหนักที่มากอยู่จึงทำให้สามารถขนส่งได้น้อย และยังเป็นปัญหาสำหรับผู้บริโภคที่ปอกรับประทานเองได้ยาก
โดยผู้ประดิษฐ์จึงได้หาทางแก้ปัญหาดังกล่าวโดยจัดทำสิ่งประดิษฐ์ที่มีชื่อว่า การออกแบบและพัฒนาสายการปอกผลมะพร้าวอ่อน โดยสิ่งประดิษฐ์นี้จะมีลักษณะเป็นสายการปอกผลมะพร้าวอ่อนที่ทำงานแบบอัตโนมัติ โดยจะแบ่งเครื่องจักรในสายการผลิตเป็น 2 เครื่อง โดยที่เครื่องแรกจะทำหน้าในการปอกเปลือกผลมะพร้าวโดยจะมีระบบสายพานลำเรียงมะพร้าวเข้าเครื่องจักรและทำการปอกจนถึงชั้นกะลาโดยมีใบมีดติดสปริงทำหน้าที่ในการปอกจนถึงกะลามะพร้าว และเครื่องจักรตัวที่สองจะทำหน้าในการตัดหัวและท้ายของมะพร้าวที่เหลือ โดยผลมะพร้าวที่ทำการปอกออกมาแล้วนั้นผู้บริโภคสามารถรับประทานได้ง่ายและน้ำหนักเบาเพื่อลดภาระการขนส่ง โดยที่สายการปอกผลมะพร้าวที่กล่าวมานั้นจะสามารถปอกผลมะพร้าวได้ที่ 3000 ผลต่อวัน

Amakorn Poommoon, Bunyong Rungroungdouyboon and Sakchai Vongkittirux, "A Potential approach for custom-made ocular prosthesis using UV-printer", The 8th TSME International Conference on Mechanical Engineering, 12-15 December 2017, ​Bangkok, Thailand

Abstract.
The lost of an eye results in psychological impact, decrease self-esteem and low quality of life. Fabrication of a custom-made ocular prosthesis is very challenging and requires artistic skill to mimic the remaining eye. The prosthesis needs to be precisely fit and matches the color of the iris and the sclera. A cosmetically acceptable prosthesis is that reproduces the color, form and orientation of the iris and the characteristics of the sclera.
The purpose of this study was to assess the color printing of both iris and sclera of an artificial eye using UV-printer machine to process the staining procedure. It can reduce time consumed, adjustable shade and provide more stable color mapping on the acrylic resin eye prosthesis.

Dulyachot Cholaseuk, "Develop of a speed sensitive collapsible mechanical speed bump", The 5th International Conference on Engineering, Energy and Environment. 1-3 November 2017, Arnoma Grand Bangkok Hotel, Thailand

Abstacts.
A speed bump is a traffic calming device that uses vertical deflection to slow vehicles, typically used in populated area. Typical solid speed bumps made of concrete or rubber can damage vehicles' suspension components and cause discomfort to passengers even when a vehicle passes at low speed. A speed sensitive collapsible mechanical speed bump presented in this paper aims to alleviate those problem in small roads. The speed bump was shaped as a regular speed bump but with internal mechanism that allows it to collapse to a flat surface when a vehicle passes at low speed while lock-up at high speed. The trigger speed is designed at 8 km/hr. Pendulum type mechanism was used for both speed sensing and locking. Result from road test confirmed that the idea has potential for future development.

Supachai Vorapojpisut, Permsap Munborirux, Siraphop Laosuarpa, Suwarang Jaisamer, “Model-based design of a teleoperated RC car: issues and solutions”, The 5th International Conference on Engineering, Energy, and Environment (ICEEE 2017), November 1-3 2017

Abstract
               This paper presents our experience on the implementation of a software system for realizing the teleoperated driving feature on an RC car. The software system was formulated as three Simulink models using the model-based design approach. Then three sets of source code were generated, built and deployed to the corresponding computer system, namely personal computer, Raspberry Pi, and FRDM-KL25Z microcontroller board. This paper focuses on a design requirement of real-time communication between each computer system based on WiFi and USB serial communication. Due to the time-triggered architecture of Simulink environment, dataflow behaviors are governed by the setting of blocks’ sample time. Even the timing of block execution should be deterministic, but undesirable issues including delay, data loss and deadlock had been observed in our system tests. By investigating communication-related blocks, data framing and execution timeout had been proposed to overcome such communication issues. By performing system tests, the effectiveness of our solution was confirmed with the bound of 0.03 second round-trip delay.

Jinpitcha Mamom, An Innovative Repositioning Bed: Instrument for Preventing Pressure Ulcers, TNMC & WANS International Nursing Research Conference 2017, October 20-22, 2017

​Introduction: A pressure ulcer, also known as pressure sore, decubitus ulcer, or bedsore, can be defined as a localized injury to the skin/ tissue occurring most often over a bony prominence and caused by mechanical loading: pressure, shearing, or friction. Pressure ulcers are a common cause of complications among immobilized patients that the immobilization is acceptable caused localized ischemia, which is a result of tissue deformation related to prolonged loading.
Objectives: To develop an innovative repositioning bed that promotes patients’ proper postures and positions, and to evaluate its efficacy in reducing ischemia, which can lead to tissue hypoxia, cell death, and pressure ulcer development.
Methods and Results: This new innovative bed differs from a conventional hospital bed, as the movement of the patient to the left or the right, and also the raising of the head and knees, can be controlled in order to prevent pressure ulcers. This is compatible with the NPUAP (2014) principle of the clinical practice guideline on pressure ulcer prevention. This bed design has 0-30 degrees of movement for the head level, 0-45 degrees for the knee level, and 30 degrees of lateral tilt to reduce interface pressure on the bony prominences, preventing friction and shearing force and thus allowing higher tissue perfusion and blood flow.
Conclusion: The repositioning of immobile patients is an important standard nursing practice that is based on the principle of mechanical loading management, including redistributing interface pressures, decreasing shearing stress, and reducing skin temperature.  This innovative repositioning bed was developed based on physics for nursing science and on nursing standards in order to effectively enable patients to properly reposition themselves at proper angles and in proper positions.  This innovative bed could be used to prevent pressure ulcers that are complications in the growing population of elderly patients incapable of repositioning themselves

Supachai Vorapojpisut, “Model-based Design of PEMS for Medical Devices”, The 11st international Convention on Rehabilitation Engineering and Assistive Technology (i-CREATe 2017), August 22-24, 2017

​ABSTRACT
               This paper addresses the software design and implementation of Programmable Electrical Medical Systems (PEMS) for medical devices according to the IEC 60601-1 standard. The standard involves many aspects of medical products’ life cycle in which Clause 14 emphasizes on risk management of safety features that depend on software or any programmable element. The software design for an infant incubator is outlined to demonstrate major issues that can arise in safety-related functions. Then model-based design based on MATLAB/Simulink has been proposed as an approach to realize safety requirements. Finally, this paper discusses the claim of safety evidence using the model as executable documents.

Supachai Vorapojpisut, Permsap Munborirux, Siraphop Laosuarpa, Suwarang Jaisamer  “Project-based Learning in the AMAS-MBD 2016”, The 2017 International Conference on Embedded Systems and Intelligent Technology (ICESIT 2017), August 2-4, 2017e to edit.

Abstract
​                  This paper presents our outcomes and experience from the participation in the Annual Student Meeting on Automotive Embedded Systems (AMAS) event. Using project-based learning concept, features in vehicle control and advanced driver-assistance systems were formulated as the design problem for the 2016 event. Our approach to solve the problem statement is based on the tele-operated vehicle framework, i.e. driving with first-person view. The development of three Simulink models for microcontroller board, Raspberry Pi board, and PC are explained as our learning outcomes. Then experienced issues are discussed for further improvement.