The document discusses the key elements of a power system, including generation, transmission, distribution, and load. It describes the different types of power generation such as fossil, hydro, and nuclear. It then explains the transmission system, how power is transmitted through overhead lines or underground cables. Finally, it discusses power distribution to load through lower voltage networks.
The document summarizes job openings at Cement Corporation of India Limited. It lists 24 positions ranging from General Manager to Junior Staff Officer. It provides details on the responsibilities, qualifications, experience required, and pay scale for each position. The last date to apply is November 19, 2015. Interested candidates are directed to the company website for full details.
Vacancies in Eastern Coalfields Limited Coal India Sudha Sati
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The document discusses the key elements of a power system, including generation, transmission, distribution, and load. It describes the different types of power generation such as fossil, hydro, and nuclear. It then explains the transmission system, how power is transmitted through overhead lines or underground cables. Finally, it discusses power distribution to load through lower voltage networks.
The document summarizes job openings at Cement Corporation of India Limited. It lists 24 positions ranging from General Manager to Junior Staff Officer. It provides details on the responsibilities, qualifications, experience required, and pay scale for each position. The last date to apply is November 19, 2015. Interested candidates are directed to the company website for full details.
Vacancies in Eastern Coalfields Limited Coal India Sudha Sati
ECL- Eastern Coalfields Limited Coal India announced 722 vacancies of Mining Sirdar/ Deputy Surveyor/ Overseer (Civil) in West bengal and Jharkhand Coal mines
Jobs in Gujarat cancer and research instituteSudha Sati
Civil Hospital Ahmedabad invites applications for various posts of Teaching/ Non-teaching posts in The Gujarat Cancer and Research Institute, Civil Hospital Ahmedabad new campus of Civil Hospital Ahmedabad
The Coffee Board is inviting applications for Junior Research Fellows (JRFs) on an ad hoc basis in its Market Research & Intelligence Unit in Bengaluru. The positions offer a monthly remuneration of Rs. 12,000. Candidates should have an M.Sc. in Agri. Economics, Agri. Marketing & Cooperation, or a related field. Applications including biodata and copies of certificates should be sent by November 13th. The positions are temporary and do not include benefits like DA or leave.
CPCB -Central Pollution Control Board announced jobs/ recruitment for Scientists and Junior Engineer posts and Physically challenged candidates will also apply for these jobs, by offline, the form of applying offline is this
CPCB -Central Pollution Control Board announced jobs/ recruitment for Scientists and Junior Engineer posts and Physically challenged candidates will also apply for these jobs, by online/ offline
Ministry of mines, Indian bureau of mines announced recruitment especially for physically handicapped (PWD) candidates in Nagpur or all over India postingf
Rajstan state Road transport corporation recruitmentSudha Sati
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Jobs in Gujarat cancer and research instituteSudha Sati
Civil Hospital Ahmedabad invites applications for various posts of Teaching/ Non-teaching posts in The Gujarat Cancer and Research Institute, Civil Hospital Ahmedabad new campus of Civil Hospital Ahmedabad
The Coffee Board is inviting applications for Junior Research Fellows (JRFs) on an ad hoc basis in its Market Research & Intelligence Unit in Bengaluru. The positions offer a monthly remuneration of Rs. 12,000. Candidates should have an M.Sc. in Agri. Economics, Agri. Marketing & Cooperation, or a related field. Applications including biodata and copies of certificates should be sent by November 13th. The positions are temporary and do not include benefits like DA or leave.
CPCB -Central Pollution Control Board announced jobs/ recruitment for Scientists and Junior Engineer posts and Physically challenged candidates will also apply for these jobs, by offline, the form of applying offline is this
CPCB -Central Pollution Control Board announced jobs/ recruitment for Scientists and Junior Engineer posts and Physically challenged candidates will also apply for these jobs, by online/ offline
Ministry of mines, Indian bureau of mines announced recruitment especially for physically handicapped (PWD) candidates in Nagpur or all over India postingf
Rajstan state Road transport corporation recruitmentSudha Sati
RSRTC - Rajstan state Road transport corporation invite application for the recruitment of various posts for state/ public enterprises employees of Rajasthan
LinkedIn Strategic Guidelines for June 2024Bruce Bennett
LinkedIn is a powerful tool for networking, researching, and marketing yourself to clients and employers. This session teaches strategic practices for building your LinkedIn internet presence and marketing yourself. The use of # and @ symbols is covered as well as going mobile with the LinkedIn app.
Parabolic antenna alignment system with Real-Time Angle Position FeedbackStevenPatrick17
Introduction
Parabolic antennas are a crucial component in many communication systems, including satellite communications, radio telescopes, and television broadcasting. Ensuring these antennas are properly aligned is vital for optimal performance and signal strength. A parabolic antenna alignment system, equipped with real-time angle position feedback and fault tracking, is designed to address this need. This document delves into the components, design, and implementation of such a system, highlighting its significance and applications.
Importance of Parabolic Antenna Alignment
The alignment of a parabolic antenna directly affects its performance. Even minor misalignments can lead to significant signal loss, which can degrade the quality of the received signal or cause communication failures. Proper alignment ensures that the antenna's focal point is accurately directed toward the signal source, maximizing the antenna's gain and efficiency. This precision is especially crucial in applications like satellite communications, where the antenna must track geostationary satellites with high accuracy.
Components of a Parabolic Antenna Alignment System
A parabolic antenna alignment system typically includes the following components:
Parabolic Dish: The primary reflector that collects and focuses incoming signals.
Feedhorn and Low Noise Block (LNB): Positioned at the dish's focal point to receive signals.
Stepper or Servo Motors: Adjust the azimuth (horizontal) and elevation (vertical) angles of the antenna.
Microcontroller (e.g., Arduino, Raspberry Pi): Processes sensor data and controls the motors.
Potentiometers: Provide feedback on the antenna's current angle positions.
Fault Detection Sensors: Monitor for potential faults such as cable discontinuities or LNB failures.
Control Software: Runs on the microcontroller, handling real-time processing and decision-making.
Real-Time Angle Position Feedback
Real-time feedback on the antenna's angle position is essential for maintaining precise alignment. This feedback is typically provided by potentiometers or rotary encoders, which continuously monitor the azimuth and elevation angles. The microcontroller reads this data and adjusts the motors accordingly to keep the antenna aligned with the signal source.
Fault Tracking in Antenna Alignment Systems
Fault tracking is vital for the reliability and performance of the antenna system. Common faults include cable discontinuities, LNB malfunctions, and motor failures. Sensors integrated into the system can detect these faults and either notify the user or initiate corrective actions automatically.
Design and Implementation
1. Parabolic Dish and Feedhorn
The parabolic dish is designed to reflect incoming signals to a focal point where the feedhorn and LNB are located. The dish's size and shape depend on the specific application and frequency range.
2. Motors and Position Control
Stepper motors or servo motors are used to control the azimuth and elevation of