https://cris.library.msu.ac.zw//handle/11408/334 2026-04-11T05:11:52Z https://cris.library.msu.ac.zw//handle/11408/3607 Title: Automated water reticulation system Authors: Mtombeni, Tendai Jameson Abstract: Prior studies have identified many problems of having poor water sanitation system. The major problem, being rise of water-borne diseases. This thesis is an advancement to an argument that the leading root cause of the water-borne disease outbreaks in Zimbabwe was the unsustainable urban environmental practice especially in the water reticulation system. The overarching purpose of this project is to give a solution to a case in which the failure in proper water reticulation system in urban towns mostly has ripple effects on the population of a country as an epidemic wreaks havoc. The scope of the thesis is on the inadequacy of safe and clean water in most of the suburbs in Zimbabwe. The collapse of the water supply and systems in the country and how the same instigated water-borne disease outbreaks. The thesis contributes to the body of knowledge and as a panacea to problems on water-borne diseases in cities of the developing world that face serious resource challenges and lack of modern technologies. 2018-01-01T00:00:00Z Mtombeni, Tendai Jameson https://cris.library.msu.ac.zw//handle/11408/3585 Title: Implementation and building of cheaper signal conditioners & a PID controller block using a PLC Authors: Ndhlovu, Archiford Abstract: The proportional, integral and derivative (PID) technique is a reliable and widely used art to control and regulate complex processes. The PID block and signal conditioners are constructed by hand inside a small memory Schneider PLC without inbuilt process control loops using software. Analogue input module of the PLC receives the analogue unconditioned signal from the rtd/thermocouple sensor, passes it through the signal conditioning phase to the pid block. The PID block executes the control logic with two degrees of freedom and then sends it to the output signal conditioning block then output PLC output module. Signal conditioning is done between the input module interface & the PID block module and also between the PID block and the output module. The processed output signal shall be sent to the final control element with the use of the PWM technique. Precise temperature control is difficult to achieve using simple inexpensive techniques, it can easily be achieved by using highly sophisticated expensive PLCs that come with inbuilt process control loops. This project aims to show that with great ingenuity, cheaper PLCs without inbuilt process control loops can be equally used to precisely control complex processes by manually building PID control blocks and signal conditioners. 2018-01-01T00:00:00Z Ndhlovu, Archiford https://cris.library.msu.ac.zw//handle/11408/3545 Title: Mobile phone based SCADA systems Authors: Juru, Commerce Abstract: Monitoring is very important in Industrial Automation to bring out reliability and accuracy thus the use of a SCADA system. SCADA is an acronym for “Supervisory Control and Data Acquisition.” This systems are widely used in industry for supervisory control and data acquisition of industrial processes. A Android-enabled mobile phone can be used as a client in a SCADA application in order to display and supervise an industrial refrigeration system. The project presents an actual implementation of the on-line controlling of the refrigeration system via mobile phone. The wireless communication between the mobile phone and the SCADA server is performed via a 3G Cloud Router. The operator can visualize and modify the plant parameters using his mobile phone, without reaching the site. In this way maintenance costs are reduced and productivity is increased. 2018-01-01T00:00:00Z Juru, Commerce https://cris.library.msu.ac.zw//handle/11408/3164 Title: Automated sand gravity filter system Authors: Dube, Busani Abstract: Sand gravity filters can be automated to suit your requirements. Be it industrial or domestic this model can be implemented with ease. This research is mainly focused on getting sand gravity filters in industries automated using measurable variables like flow and level. The controls are based mainly on monitoring the filter tank level versus the outlet and inlet flows. Inlet flow and outlet flow are regulated to maintain a certain level beyond which the filter tank will be deemed flooding. With controlled flow certain levels in the filter tank signal clogging of the filters which will require cleaning using a backwash process. This process requires starting and stopping of pumps and air blower, hence using sensors and controllers the system can be automated. 2018-01-01T00:00:00Z Dube, Busani