DesignAssignment1(2011).3.doc

AssignmentGuangdong University of EducationBTEC CenterProgram: Electrical/Electronic Engineering (Electronic) Unit Title: Engineering Design Unit No: 06 Assignment Title: Multipoint Temperature Measurement (Part I) Assignment No.: 0601 Issue Date: 09.15 Submission Deadline: 10.20 Assessor/Tutor: Yuhuang Zheng, Xiangdong Yi Internal Verifier: Liying Xie Student: Dong Liang Students Reg. No: B876240 NOTES TO STUDENTSl Check carefully the submission date and the instructions given with the assignment. Late assignments will not be accepted.l Ensure that you give yourself enough time to complete the assignment by the due date.l Do not leave things such as printing to the last minute excuses of this nature will not be accepted for failure to hand-in the work on time. l You must take responsibility for managing your own time effectively.l If you are unable to hand in your assignment on time and have valid reasons such as illness, you may apply (in writing) for an extension. l When you refer to the work of other authors in your assignment, you must practice citation by following Harvard System for Referencing.l If you are caught plagiarizing, you could have your grade reduced to zero, or at worst, you could be excluded from the course.STUDENTS DECLARATION:I confirm that this is all my own work.Student Signature: Dong Liang ASSESSMENTOutcome/SkillCriteriaEvidenceFeedbackAssessIV1. Prepare a design specification1.1 Establish customer requirements List a table of customer requirements1.2 Determine the major design parameters List a table of major design parameters 1.3 Obtain design information from appropriate sources and prepare a design specification List a table of the electron components you choose in this design 1.4 Ensure that the design specification meets requirements Compare the electron components table and major design parameters table, and ensure that the design specification meets requirements3. Use computer-based technology in the design process3.1 Identify the key features of a computer-aided design systemSelect a proper computer-aided design system including software and hardware to help you in this project.3.2 Use computer-aided design software to prepare a design drawing or scheme Use the computer-aided design software to draw the scheme of the digital thermometerAdvanced Grading AssessmentM1 identify and strategies to find appropriate solution An effective approach to study and research has been applied Establish the digital thermometer revenue model and analyze the percentage revenue loss because of delay.M2 select/design and apply appropriate methods/techniquesRelevant theories and techniques have been applied. Compare different technologies by costs including NRE cost and Unit cost. Choose the best technology in this design.M3 present and communication appropriate findingsA range of methods of presentation have been used and technical language has been accurately used.Present and express these tasks in a fluent language Format of this assignment is correctMake less grammar errorD1 use critical reflection to evaluate own work and justify valid conclusionConclusions have been arrived at through synthesis of ideas and have been justified. Compare technologies by costs not only depends on quantity but also consider time-to-marketD2 take responsibility for managing and organizing activities.Autonomy/ independence has been demonstrated a new way to design the digital thermometerD3 demonstrate convergent /later creative thinking.Innovation and creative thought have been applied Innovation and creative thought have been applied when design the digital thermometer Assessors signature: IV agreement: Yes No IV signature:Students Feedback In this homework, I find a lot of informationStudents signature: Dong LiangNotes:Assignment DescriptionScenarioEnergy consumption in data centers is increasing dramatically as the information technology (IT) infrastructure provides higher speeds and capacities and the deployment of IT equipment expands. In a data center, the percentage of energy consumed by air conditioning is high at about 40%, and reducing this energy use has become a major issue against the background of global warming. To make detailed temperature measurements with the aim of achieving energy-efficient data centers, John leads his researchers to develop multipoint measuring technology in order to measure the spatial temperature. Temperature measurements have traditionally been performed using discrete temperature sensors like thermocouples, thermostats, and platinum resistance thermometer bulbs. More recently, integrated-circuit-type temperature sensors, which integrate a temperature sensor with communication functions in a one-chip configuration, have become practical and have been applied to temperature measurement in various situations. However, conventional temperature sensors such as these cannot easily handle a few hundred to several thousand servers considering the work involved in laying signal-lines, the need to shorten measurement time, the cost involved, and other factors.If you were John, how do you develop the multipoint measuring technology? There are some tasks to guide you to do this project.Tasks：1. (Pass Criterion 1.1) Establish customer requirements. Please list a table of customer requirements. According to Scenario and the general requirements of the multipoint temperature measurement technology, please list a table to establish customer requirements.2. (Pass Criterion 1.2) Determine the major design parameters. Please list a table of major design parameters. According to Scenario and the general requirements of the multipoint temperature measurement technology, please list a table to determine the major design parameters3. (Pass Criterion 1.3) Obtain design information from appropriate sources and prepares a design specification. Please list a table of the electron components you choose in this design. According to the table of customer requirements and the table of major design parameters, please choose the electron components and list them.4. (Pass Criterion 1.4) Ensure that the design specification meets requirements. Compare the electron components table and major design parameters table, and ensure that the design specification meets requirements. Please explain why the electron components can be satisfied with the design specifications.5. (Pass Criterion 3.1) Identify the key features of a computer-aided design system. Select proper computer-aided design software. According to the table of customer requirements and the table of major design parameters, please choose proper computer-aided design software and explain why you choose this software.6. (Pass Criterion 3.2) Use computer-aided design software to prepare a design drawing or scheme. Use the computer-aided design software to draw the scheme of the digital thermometer. The scheme of the digital thermometer must include the electron components you choose above.1. Now I will establish customer requirements in table 1Table1Customer list of requirementsCompanyData centreProject NameMulti-point Measurement Temperature InstrumentRequirementTo design a system to multiple space temperature measurementCompletion timeIn 2 weekscost$2002. Here are the design parameters in table 2Table2: Design parametersMeasuring range32Measuring scope-10 to +65Temperature deviation0.5CRelative Humidity0 to 100%RhMeasurement points23.I will prepare a design specification and here are the electron components I choose in this design in table 3.Table 3 electron components listnameSpecificationnumberTemperature sensorDS18B204SCM controllerAT89S511CapCAP3Resistor4k1CrystalCRYSTAL1LEDMAX721914.Now I will analyze the reason that I choose those electron components.Temperature sensor As we know, we need to design a Multi-point Measurement Temperature Instruments measuring scope is from -10 to +65, and the DS18B20 measuring scope is from -55 to +125 DS18B20 can provide 9-12 temperature readings, high precision, and its just an information transmission signal line, and the computer interface is very easy to read and write, and temperature change of power from the data lines without additional power. DS18B20 temperature can be measured directly into the computer can recognize the digital signal output, the temperature values do not need to get through the first bridge circuit voltage analog, and then the signal amplification and A / D converter into a digital signal, temperature sensor exists to solve the traditional the result of parameter inconsistency when replacing the sensor zero drift due to amplifier circuit must be re-commissioning of the problem, easy to use. Each DS18B20 has a unique serial number, which allows multiple DS18B20 connected to the same bus, especially suitable for multi-point temperature detection system5.I will choose protues to finish the design and here is the table to introduce the software.Simulation SoftwareName:ProteusFeaturesProteus analog circuit simulation, digital circuit simulation, microcontroller and its peripheral circuit of the system simulation, RS 232, a dynamic simulation.Proteus can undertake intuitive analog/digital circuit, SCM, ARM simulation. It also can undertake simple PCB design.Software NameProteusAdvantages1.Proteus simulation resources are very rich and can provide analog (digital), AC (straight) flow, and other components of more than 30 libraries2.Proteus, compared with other EDA tools for its revolutionary breakthrough is the microprocessor application, can directly in the virtual prototype based on principle diagram on programming, and realize the real-time debugging software source code levelReference:Books:Journal articles:Interne