Development of electromagnetic-based haptics display with height variation | |
| Author | Pujianto, Hilarius Prin |
| Call Number | AIT Thesis no.ISE-22-03 |
| Subject(s) | Haptic devices Electromagnetic compatibility |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Mechatronics |
| Publisher | Asian Institute of Technology |
| Abstract | This research enhances the haptics display that usually functioned as a dynamic Braille Letter, with an ability to vary the dynamic pins' height. These height variations can be utilized to deliver more kinds of information, for example the color, density, graphic trend, etc. There are nine cells of moving pins developed in this research. The movement range of the pins is between 0 to 10mm, with the distance among the pins is around 14mm. There are ferromagnetic sheet walls outside each cell to redirect the magnetic field so that the interaction among permanent magnets is reduced since the distance among pins is very close. Every cell consists of a pair of coils and permanent magnets as the main components. The system's working principle is by flowing different amounts of an electric current inside the lower and upper coil in the cell. The permanent magnet moves up or down along with the pin according to the received magnetic force produced by the coils. The electric current regulation process is done by utilizing a MOSFET for each coil driver. The electric current amount depends on the input that is converted to 8 bits digital value then to analog (voltage) and sent to the MOSFET. A braking mechanism driven by the servo motor stops the pin movement and makes the power for the coils can be turned off to avoid excessive heat of the coil and the pins can withstand 0,5N of load on it. The repeatability rate of the system is stated with Standard Deviation value 0.106 and Pooled Relative Standard Deviation 2%. The accuracy of the system is 76%. The performance is affected by the coil winding and friction among the parts. |
| Year | 2022 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Systems Engineering (ISE) |
| Chairperson(s) | Manukid Parnichkun |
| Examination Committee(s) | Mongkol Ekpanyapong;Pisut Koomsap |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2022 |