Dagang Oilfield is headquartered in Tianjin Binhai New District, bordering the Bohai Sea in the east, bordering the Jizhong Plain in the west, adjoining Shandong in the southeast, and reaching the junction of Tianjin and Tangshan in the north, spanning 25 districts, cities, and counties in Tianjin, Hebei, and Shandong. Exploration and development construction started in January 1964, with a total area of 18,716 square kilometers in exploration and development. It is 190 kilometers away from Beijing, 40 kilometers away from Tianjin New Port, and 70 kilometers away from Tianjin International Airport. It has an advantageous geographical position, developed land, sea and air transportation, and convenient transportation. It is an important part of the Bohai Rim Economic Circle.
100个大工作区。 The heavy-duty machinery and equipment in the field environment is relatively noisy. The application range is mainly in the outdoor area. The industrial area is combined with the outdoor work area. It covers a large area and has a wide range. It can be divided into 100 large work areas. The project requires regular ringing for commuting to and from work. The leadership office can page independently or in full for all outdoor areas. When there is a leader inspection, it is necessary to play the voice of attention to work safety matters.
The design principle is as follows:
1, the noise is relatively large, the outdoor part considers the treble effect is relatively good waterproof treble horn.
2. The outdoor area is relatively wide, so fiber transmission is considered for the transmission method.
3. According to the specific work area, select the network broadcast system to achieve better system control.
4. The leadership office needs to page, so design a sub-control point in the leadership office.
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