Lab 3 Proposal Memo

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California State University, Sacramento *

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530

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Mechanical Engineering

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Apr 3, 2024

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docx

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3

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Arm Sleeve Generator To: Professor Itua Date: October 4, 2017 From: Team Homemaker/Melissa Bustamante, Wallace Lee, Nicholas Del Real, Trisha Wasson, Adrian Yao Project Title: Arm Sleeve Generator Executive Summary Our objective is to create an armband that will have an output of electricity using thermoelectric generators. The armband will also protect against the development of carpal tunnel syndrome and cool down the body. This memo includes specifications of our armband design, materials and their cost, our plan for our design, how it is split among members, and any future changes to the design (if possible). A Case for the Project Carpal tunnel syndrome is very serious issue. It is caused by repetitive motion which results in extreme inflammation in the ligaments and tendons. Most notably in the wrist, palm and forearm. The pain is so excruciating that only 23% of patients return to their profession. According to the U.S Department of Labor, carpal tunnel syndrome affects hundreds of thousands of workers in the United States however, overseas in China, it affects fifteen percent of the population is which equates to 150 million people. In America, the U.S. Department of Labor stated that Carpal Tunnel Syndrome costs companies 20 billion dollars, due to workers compensation. Treatments for carpal tunnel syndrome would be wearing a splint or a brace along with cooling the affected area. Some of the main occupations responsible for the development of carpal tunnel are farm workers and factory workers. We believe that another beneficial function of our arm brace should be to generate electricity. Most occupations that have a risk of developing carpal tunnel syndrome are very labor intensive. We can create free electricity for people who lack access in more rural areas. Project Description An arm sleeve that has about 5-10 peltier tiles which harvest the body’s heat into energy. The arm sleeve is 9 inches by 3.5 inches wide and each tile is 40mm by 40mm in area. The peltier tiles work by the temperature difference on both sides transferring heat between two electrical junctions, thus creating an electric current. We plan to use body heat for the “hot side” and the cool air for the “cool side”. Our plan is to generate up to 5 volts of electricity, which would be enough to charge a cell phone battery. The arm brace would constrict the muscles in the forearm holding it in a neutral position, thus reducing the risk of symptoms from carpal tunnel syndrome. Also, the cooling effect of the peltier tiles would help cope with existing carpal tunnel, or signs of carpal tunnel. The materials that we would need are an arm sleeve, peltier tiles, heat sinks, thermal tape, LED lights, Joule Thief (voltage booster), 20 gauge wire, rechargeable battery, electrical tape, electrical caps, and a multimeter.
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