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Design and Implementation a Smart System for Controlling and Protection of Tele-Communication Manholes

Ahmadi, Ali | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56263 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Safarian, Amin Ghasem
  7. Abstract:
  8. The telecommunication manhole is a place that the cables of the telephone network are located on it. line Inside these manholes, there are equipment and cables for telephone. The number of these places is many, so protection and maintenance of the manholes have been problematic in case of theft of the cap, equipment inside them and flooding. Also, lack of inspection officers and the high cost of repairing and replacing parts inside them, has made it difficult for telecom companies to handle these problems. The only way to connect the manhole is a telephone line inside them. Also, there is no proper electrical power inside the manhole, so the design and implementation of a system that examines and reports the manhole condition has not been done so far. Tele-Remote Communication is a way to transmit DTMF data through the telephone line. But despite the possibility of transmitting data through the telephone line, the main challenge for this project is to supply its circuit with a limited electrical power of telephone line. In this system, a low-power ultrasonic sensor or a magnet sensor controls the status of the manhole’s cap and by a microcontroller, the relevant data is transmitted by telephone line to the Central-Office. The center will also send the corresponding command to manhole when it receives this data. To supply this circuit with electrical power, a voltage regulator circuit is designed. This regulator converts the voltage of the telephone line to the proper voltage for the system, without busy. With the power of the telephone line, system can be powered and backup battery can be fully charged. Backup battery is used when the system contacts the center. In these cases, the power circuit of the system is disconnected from the telephone line and the battery provides electrical power for it and after the call is completed, the circuit will return to its main state. So in this way, the data of the manholes are transmitted to the center and they can be managed and protected. By analyzing the power consumption of the system, it will be possible to use other sensors and modules such as temperature and humidity sensors, water detector and Bluetooth module. By implementing a low-power node and exchanging sensor data with the center via a telephone line, an IoT(Internet-of-Things) network has been created. As a result, with the design of the collection and analysis center of these data, we can have effective management and protection for manholes
  9. Keywords:
  10. Protection ; Low Power System ; Voltage Regulator ; Internet of Things ; Phone Call ; Telecommunication Manhole ; Tele-Remote Communication

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