Embedded Files
Jet Lag Fighting Glasses 2.0
Our mission objective is to turn a functional device into a marketable and aesthetic product.
Objectives
Currently, the electronics of the glasses work and it is 2 Projects, 1 Team's job to create and aesthetically pleasing look which integrates this circuitry. Components include the micro-controller, battery, and connectors. The goal is to design elegant glasses which diffuse blue light while considering UX design. After the sunglasses are designed, engineering drawings and BOM will be made along with manufacturing procedures and quotes. This design is meant to make the user feel cool and sexy while reducing jetlag.
Primary Requirements
Aesthetically pleasing and marketable sunglasses
Functionality of light filtering and emission
Prototypes
Week 7 Prototype (Black&Yellow)
Currently, the sponsor, Wearable Sensing is creating glasses which block outside blue light and has its own blue LED lights which are controlled by a micro-controller. This allows the traveler to reset their body's clock because timed light exposure can affect the behavior of the user and therefore, synchronize the body to the time zone s/he are currently in. The picture to the left is the current design.
Background
When travelers are going from one place to another across time zones, they experience a physiological affect known as jet lag. This is due to a different in normal daily cycles, which changes their circadian clock. This can affect a person's everyday activities such as sleeping and eating and may take up to days to adjust to.
Notable traits
Lighting wired up for testing of lens reflection and diffusion
Test head (Steve) wired up with photoresistor to determine effectiveness of lens reflection as a function of geometry and pattern
Frame printed for fit check and appearance
Week 8 Prototype (Black&Green)
Notable traits
Slide on/off lids for PCB enclosure
Led light passed through small holes to wearer from sides pointed in
Slides on sides of front frame allow for removable lenses by allowing front frame to be disassembled
Temples have internal volumes and slide on/off lids for battery and PCB
Week 9 Prototype
Changes from previous Prototype
Printed in Vericlear on the Objet printer
Utilizes opaque print material for internal light refraction
Sponsor wanted top brow bar to block more external light
inside support of lens cut in half to remove alignment issues
Snap added to nose bridge to hold front frame together better
Slides for front frame altered to present a more uniform surface on sides
Smaller wires and small circuit boards at the corners made a cleaner appearance
Treecheck
Trees provide an ecological contribution in urban settings. They can provide significant cooling, water management, wind control, and social and economic benefits. Social benefits includes making the city more desirable to live in. In order to maintain these trees, people must maintain their health. This can be done by testing whether a tree is decaying or not. The benefits of checking wood decay can also help safety. If a tree is decaying, it may break and fall in close proximity or on people, cars and buildings. Safety is a large reason why it is important to check for tree decay. An example of tree decay is shown below.
Background
The primary objective of this project is to design a reliable and robust method of protecting the circuit board from damage. Currently, the circuit board is screwed onto a c-clamp but does not have casing. This can pose as a problem because the current use of the circuit board is to attach it to a screw where the screw is attached to a tree. The screw head is then struck by a hammer to induce a wave. The hammer strike is the largest concern for a our product design.
Overview
When looking at saprophytic decay, this means the structural integrity of the standing tree is reduced. Sometimes visual inspection is not enough to check early signs of decay stress. This is why it is important to create a single-path stress wave timing mechanism. The sponsor, Bruce Allison is creating a cheap and affordable stress wave timing mechanism where two accelerometers are attached to a screw with a c-clamp on opposite sides. These accelerometer probes must be aligned horizontally on both sides and must penetrate into the sap of the tree. The screw is then hit by a hammer to induce a wave and the accelerometer is able to sense the impact and output a wave; this wave is used to measure the decay of the tree. The person using this mechanism must use the tree stress wave timer in different cross sectional areas of the tree to check for decay. This method is nondestructive testing procedure for the tree and utilizes visual assessment of the tree, acoustic tools, and a micro-drill.
Sometimes, tree decay is hard to avoid but it is important to check when tree decay happens in order to protect those in close proximity. If the structural integrity of a tree fails due to bad health tree detection, this can result in building damage, millions of dollars in other property damage, and loss of life. And example of the importance of tree decay is during the storm in San Diego during Winter quarter. Many trees fell on top of cars and caused a lot of physical damage towards people.
Our Design
Primary Requirements
-Protection of the small circuit board that has low manufacture costs.
-Design the sensor probes to be used easily by an arborist or consumer
-Although the circuit board size will eventually be reduced in size, the RJ11 phone jack on the board will not be changed. This telephone cord is the primary method of data transfer. The current dimensions are 0.4” x 0.75” x 0.5”.
The objective is to create a housing which protects the blow from a circuit board. The image to the left is an image of the current design for the sensor probes. As shown, the circuit board is very open and exposed to many types of potential damage and environmental factors. A specification for this project is to design a case for low cast manufacturing. Once a design is completed, a prototype will be made for material testing. A bill of materials, suggested manufacturing methods, and drawings necessary to send to the manufacturer will be produced.
Objectives
This design was chosen to withstand the force of a hammer and also be easily manufactured. The lid can be easily injection molded, protects the RJ11 phone jack, and also has room for branding. The base allows the user to easily use different size wood screws, uses the extrusion manufacturing method and allows a tight hold for the lid. It also allows an easy way for the circuit board to be held. More details about this design can be found on the "Final Design...We're getting there" tab.
Test Results
To figure out if the design could withstand the force of the hammer, it was important to calculate the average force needed to start a good stress wave time. This was done by having a hammer swing at different angles like a pendulum. Once we found the proper angle which simulated a good wave stress time, the wood screw was replaced with the force gauge to obtain the average force.
Displacement Simulation Stress Simulation
After the average force was determined, this number was used in the SolidWorks simulation to determine if the lid geometry and material was strong enough. The force was simulated to be in the horizontal direction and the base of the lid was fixed. The displacement simulation showed that the RJ11 phone jack would still be protected by the case and the stress simulation showed the lid would not break. The results show that at 66.7 Newtons (the average force), the lid would have a maximum displacement of 0.002077 mm and have a maximum stress of 5.55 MN/m2.
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