Track: Mechatronics

Abstract

This paper proposes the voice command operated design of vertical lift for differently challenged people, suitable for three out of four Disability categories, for elderly, physically challenged, visually impaired, auditory impaired, and people with some degree of motor inability.

The Preliminary design is the result of the study of an actual site, understanding the requirements of four major disability types, their ergonomics, available assistive devices, and literature review. In addition, other factors like the disability act, user equipment regulations, user safety, emergencies, and operational requirements of lift were studied.

The first part of this paper is the mechanical design, actuation design with the capacity to lift one "wheel-chaired" person (or any differently challenged person) along with an assistant in case available. Scissor-type electro-hydraulic actuated design takes care of 500 kg., Safe load for 02-meter lifting height, supported by FEA results.

For Voice command operation experiments, used ATmega328P microcontroller, SPCE061A Sound controller, APR33A3, USB-TTL, HC-SR04 ultrasonic distance sensor, and LCD. Used "Access port" and "HTerm" software. Recorded and tested 05 commands to drive the test motor & LED signals for defined logic. The paper includes a block diagram and flow diagram of lift Operation. This paper details the experiments for voice recording & playback, voice recognition using SPCE061A, the software for voice commands input, and usable format conversion and testing of 05 commands to operate the motor. The paper consists of hardware information, methods, and connections of hardware used during the experiments, step-by-step processes, and cases of logic, failure and success of the techniques before the final results.