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dc.contributor.authorMubiru, Hassan
dc.date.accessioned2022-05-16T10:23:57Z
dc.date.available2022-05-16T10:23:57Z
dc.date.issued2022-03-16
dc.identifier.citationMubiru, Hassan. (2022). Design and implementation of a low-cost lie detector. (Unpublished undergraduate dissertation) Makerere University; Kampala, Uganda.en_US
dc.identifier.urihttp://hdl.handle.net/20.500.12281/12545
dc.descriptionA research report submitted to the College of Engineering Design and Art in partial fulfillment of the requirement for the award of a degree Bachelor of Science Electrical Engineering of Makerere Universityen_US
dc.description.abstractA lie detector or a polygraph is a device that measures and records physiological variables such as blood pressure, heart rate, respiration rate, and skin conductivity while a person is being interrogated, toward establishing a measure of veracity. State-of-the-art polygraphs are expensive (>2,000 USD), and thus, their traction in developing countries is low. In Uganda, it is common for security agencies to resort to rudimentary or inhumane interrogation techniques such as torture, as an alternative. To address this challenge, we have developed and validated a prototype of a low-cost lie detector comprising a Galvanic skin Response Sensor (GSR), respiratory rate sensor (RRT), and a heart rate sensor (HRT). We developed custom RRT and GSR sensors and used an off-the-self HRT sensor. We integrated the sensors with power, control, monitoring, and data transmission circuitry, and developed a user interface for the device, powered by digital signal processing algorithms. Evaluation of our device on healthy volunteers yielded an accuracy of ~70% which compares to state-of-the-art devices. Our device could provide a means for low-cost polygraph suited to the needs of developing countries.en_US
dc.language.isoenen_US
dc.publisherMakerere Universityen_US
dc.subjectDesign of low-cost detectorsen_US
dc.subjectImplementation of a low-cost lie detector.en_US
dc.titleDesign and implementation of a low-cost lie detector.en_US
dc.typeThesisen_US


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