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dc.contributor.authorMejias, Melitzaeng
dc.contributor.corporatenameUniversity of Missouri-Columbia. Office of Undergraduate Researcheng
dc.contributor.meetingnameSummer Undergraduate Research and Creative Achievements Forum (2004 : University of Missouri--Columbia)eng
dc.date.issued2004eng
dc.descriptionAbstract only availableeng
dc.description.abstractA Polymerase Chain Reaction on chip needs a precise temperature control for the reaction cycle. It is necessary to create and develop a good temperature control system for the operation of the PCR chip. Thin Pt film will be used as the heater and temperature sensor. The heating circuit will be controlled by a PID (Proportional, Integral, and Derivational) controller based on LabView and a power MOSFET operated using PWM. The PCR chip needs heating/cooling cycles which require a temperature increase to a certain point and maintain for some time and go to some other points (94, 72 and 54 C). For testing purpose, a testing circuit was created using a power MOSFET, a RTD (Platinum Resistance Temperature Detector) as the temperature sensor and a piece of graphite as the heater. The Pt RTD was used in this circuit, because the Pt resistance has a linear relationship with the temperature and could be used to calibrate the deposited Pt film on chip. A LabView program was developed to control the heating power through a Power MOSFET by modulating the duty cycle of the VGS pulse train. The main function of the program includes temperature sensing, PID temperature controlling, data logging, etc. The parameters of the PID were tuned up by Ziegler-Nichols frequency response method. Experiment shows good control of the temperature within +/- 1 degree.eng
dc.description.sponsorshipLouis Stokes Alliance for Minority Participationeng
dc.identifier.urihttp://hdl.handle.net/10355/1791eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbia. Office of Undergraduate Researcheng
dc.relation.ispartof2004 Summer Undergraduate Research and Creative Achievements Forum (MU)eng
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. Office of Undergraduate Research. Undergraduate Research and Creative Achievements Forumeng
dc.source.urihttp://undergradresearch.missouri.edu/forums-conferences/abstracts/abstract-detail.php?abstractid=eng
dc.subjecttemperature sensingeng
dc.subjectPID (Proportional, Integral, and Derivational) temperature controllingeng
dc.subjectpolymerase chain reaction (PCR)eng
dc.titleDevelopments of a pid temperature control system for a PCR chipeng
dc.typePresentationeng


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