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1. Our client specifically needs to know the costs of each unit for personal use as well as costs of multiple units for future plans to market the product Providing accurate costs information will undoubtedly assist our client in assessing marketing feasibility of the product The overall costs of this project must remain within our client s means and must follow a direction that meets the cli ent s needs 2 3 Project Deliverables 2 3 1 Client Status Report This report allows for you to assess how well the team understands the proposed project This will give a good chance to redefine objectives that are unclear or misunderstood 2 3 2 Proposal Document The proposal document is another chance to ensure that the team has a good understanding of the project and the team is on the way to begin initial design 2 3 3 Status Report This status report is a relatively informal document to the client which will allow for team as sessment of the progress made to date and allow for the client to monitor our status as well 2 3 4 Capstone Design Conference The Capstone Design Conference is the final presentation for the completed project The confer ence is intended for each design team to present the projects they worked on throughout the year The display is open to the pubic and the client will be invited to attend 2 3 5 Final Report This will be the final document delivered to the client The report will include any and all infor mation discuss2. call light will be safe to the user patients doctors and everyone 2 1 6 Environmental Protection Environmental protection will also be our integral part of our design Our final design of the doc tor s call light will operate in such a way that maximum environmental protection is ensured All team members have an ethical duty to ensure environmental protection during the course of this project 2 1 7 Manufacturability Manufacturing ease of the multi use stations is desired This project requires multiple intercon nected units in order to function properly Therefore a design will be ineffective if it is difficult to create or duplicate 2 1 8 Maintainability Similar to most office installations a desire exists to have a product that does not need any sub stantial amount of upkeep and maintenance All time spent maintaining an office product means less time is being spent on customers 2 2 Design Approach The design approach contains specific design goals and how the team will be organized to attach the problem 2 2 1 Design Goals 2 2 1 1 Improve Medical Clinic Communication The system should improve communication between the doctor and the patient medical as sistant s front desk and cleaning assistant 2 2 1 2 Modular Design Most designs require a specific number of units in order to function properly In a modular design the number of units in a system can vary This is an advantage because a modular system will have smooth t
3. of electronics component Size of control panel Interconnection thermostat cable Protection Electrically isolated from ESD and if a metallic blank is used then it must be properly grounded Pushbuttons must be durable to withstand years Controls of daily use 1 1 3 Environment 1 1 3 1 Temperature Each multi use station will reside in a room temperature atmosphere and the units must not build up excessive heat within the in wall box Also the stations will be designed to meet specifications given by the given microcontroller s data sheets 1 1 3 2 Humidity The multi use stations must not malfunction as a result of excessive moisture within the wall in which it installed The stations must use fuses or circuit breakers to prevent fire hazards in the event of direct contact with moisture such as a leaky pipe 1 1 3 3 Vibration Shock The multi use stations must withstand vibrations of the wall in which it is installed such as vibration from nearby doors being closed 1 1 3 4 Packaging Since both plastic and metal blank covers will be options for the control panel proper electri cal grounding and isolation will be required to protect against electrical shocks and ESD dis charges Table 1 3 3 Environmental Specifications Requirement Value Absolute Maximum Temperature 125 C 1 1 4 Documentation 1 1 4 1 User s Manual A user s manual will be made availabl
4. 2 1 Design Philosophy The design philosophy involves general design goals applicable to this engineering design effort 2 1 1 Performance System performance must not rely on a single microcontroller The system should be comprised of autonomous interconnected units Failure of a single unit should not affect the performance of the rest of the system The system must take advantage of the distributed microcontroller design so as to be a superior alternative to simpler switch based systems 2 1 2 Ease of Operation The operation of the system must be easy for new users to learn It must improve not hinder the workflow of a typical medical clinic Complicated button combinations and programming options must be kept to a minimum 2 1 3 Installation Installation of the units should be simple Upon installation each unit should not require exten sive programming When linked together with the specified connections communication between the units should occur automatically 2 1 4 Quality The product will be used in a setting that normally consists of high quality products and materials The final product will meet the needs of a fast paced and demanding workplace by providing a smart user friendly alternative to existing office technologies 2 1 5 Design Safety It is important to incorporate safety in our design This is because the biggest gains in safety and the biggest reductions in cost tend to come when safety is inherent in any design The doctors
5. Requirements Documentation 1 1 Overview Today s medical clinic can be a busy fast paced environment In order to effectively attend to their patients clinic staff must be able to maximize exam room use This can be accomplished by using some means of indicating each room s status to other staff members A typical progression of events in an exam room is as follows 1 A medical assistant accompanies a patient to the exam room 2 The medical assistant takes the patient s vital statistics 3 The patient waits in the exam room to be seen by the doctor 4 The doctor sees the patient at which time some treatment may be administered 5 The doctor proceeds to the next waiting patient and the exam room is cleaned and prepared to accept a new patient Many medial clinics use simple mechanical systems of colored flags to display the status of each exam room These outdated systems have the following drawbacks They are cumbersome Because the flags are mounted near the tops of doorways it is awk ward for clinic staff to change them They are also susceptible to being incorrectly changed They are not automated Flags do not recognize when a doctor has finished attending to a patient in another room Therefore clinic staff must manually change the position of the flags They do not prioritize workflow Colored flags can t indicate to the doctor which patient to see next They also cannot keep track of time for speci
6. e once the design has been completed and tested This manual will include how to configure the call light system as well as how to use the call light system on a day to day basis 1 1 4 2 Maintenance Manual A maintenance manual to accompany the user s manual will specify any required mainte nance and installation procedures Also included will be a number of design documents relat ing to how the project was engineered This document will include specifics on hardware wiring network interfacing and programming 1 1 5 Testing 1 1 5 1 Procedures Testing will be done by temporarily interfacing inputs and outputs to a test chip No perma nent connections will be made and it will be easy to insert and remove a chip for ease of testing and debugging 1 1 5 2 Equipment Our testing environment will consist of a breadboard for interfacing inputs outputs and power to the chip Connected to the breadboard will be a power supply LEDs buttons and other interface elements as needed We will also use a programming board in order to reprogram and debug chips 1 1 6 General 1 1 6 1 Safety This system will be installed in commercial settings where its safety and performance will be critical This will require that the system meet all electrical codes and regulations 1 1 6 2 Client Preferences The client has purchased Microchip PIC16F877 chips for use in each multi use station and prefers the use of these chips in the design 2 Design Plan
7. ed in the design conference and much more All final design specifications will be provided in extensive detail A final status report will also be included to let the client know how well the team performed throughout the year in trying to fulfill the assigned endeavor 2 3 6 Installation The call light system will be installed into our client s medical clinic This will include the in stallation of a multi use station for each room Project Schedule Following is a list of events that will take place during the course of the design Note that several events take place on January 19 2004 This is not the actual date these events will occur These events will be scheduled by that date Event Begin Date End Date Client Status Report Rough Draft Tue 9 9 03 Fri 10 31 03 Client Status Report Final Draft Mon 11 3 03 Tue 11 4 03 First Class Presentation Tue 11 4 03 Tue 11 4 03 Faculty Advisor Meetings Every Tuesday Team Meetings Every Monday Research Mon 1 19 04 Hardware Mon 1 19 04 Software Mon 1 19 04 Capstone Demonstration Mon 4 26 04 Testing Prototyping Mon 1 19 04 Purchasing Vendors Mon 1 19 04 Web Site Tue 9 30 03 Mon 1 19 04 Travel Mon 1 19 04 Financial Tasks Mon 1 19 04
8. er supplies to deliver the proper voltages and currents for each microcontroller that is used 1 3 1 3 Interfacing The multi use stations require a reliable communication link and protocol Additionally the customer has specifically requested that each unit contain its own microprocessor and inter face hardware so that the stations will be modular Table 1 3 1 Electrical Specifications Requirement Value Microprocessor Type Microchip PIC16F877 Voltage Rating 2 0 to 5 5 Volts Communication Link Type 13 pair cable Communication Protocol RS 485 Electrical Guidelines The National Electric Code 1 3 2 Mechanical 1 3 2 1 Size The size of the multi use station is limited by the requirement that it must fit into a single gang electrical outlet box and the control panel must be made from a simple outlet box blank There are many variations on outlet box sizes which requires the stations fit within the mini mal box dimensions in order to be universally accepted for production 1 3 2 2 Weight Weight is only a factor in each station be mounted in an electrical outlet box which is where it will be permanently installed and will not pose a constraint Table 1 5 2 Mechanical Specifications Requirement Value Must not be greater than the following Height 2 Width 2 Depth 2 Typical electrical outlet blank Height 4 Width 2 Weight No pertinent constraint Multiple twisted paired telephone cable or Size
9. fic types of treatment For these reasons administrators feel the need to upgrade to a modern system While inexpensive electronic systems exist they lack capabilities They are typically switch based systems whose units do not communicate with each other Such systems are not much more than an electronic version of colored flags There are more comprehensive solutions but they are much more expensive These systems require significant consultation and design for each individual application Furthermore they can be difficult to set up to use and to maintain Our goal is to design an affordable modular electronic system that will effectively improve a typical medical clinic s workflow Our system will consist of multiple modular in wall electronic indicators These units will be easy to set up and operate They will be interconnected so as to display thorough information about exam room s status Optionally our system will include a computer interface to display and log room status 1 2 Block Diagram Power Bus Network Traffic Network Interface Chip Microcontroller Unit Microchip PIC User Interface 1 3 Requirements 1 3 1 Electrical 1 3 1 1 Microcontroller This project is centered on the use of microcontrollers for each multi use station Therefore most of the electrical requirements pertain to the selected microcontroller s specifications 1 3 1 2 Power The multi use stations will require one or more pow
10. ransitions in the event of remodeling moving or marketing this product to another company 2 2 2 Team Organization Each problem should be distributed to a group or team member based up each team member s strengths 2 2 2 1 Hardware Alan Bill and Rob will be directing their attention toward the hardware subsystem This in cludes interfacing the microcontroller to output lights a power supply and a communication chip used to transmit information on the network 2 2 2 2 Software Kevin and Tom will be focusing on the software The software subsystem involves complet ing the basic functions of the unit as well as communicating with the other units on the net work 2 2 3 Schedule The design process consists of four stages in the following sequence a requirement stage a pro posal stage a design phase and an implementation phase The first two will take place during the fall semester of 2003 The last two will be carried out during the spring semester of 2004 This will then be followed by the capstone design conference on April 26 2004 in which the project will be presented This schedule is standard of the senior capstone design process and each stage is equally important for the overall success of the project 2 2 4 Cost Analysis This is a vital aspect of the project to meet the client s expectations The goal of the analysis is to minimize and assess the costs associated with the final product to be marketed to its target seg ment
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