What is a global positioning system (GPS)?
The Global Positioning System (GlobalPosiTIoningSystem-GPS) was developed by the United States since the 1970s. It took 20 years and cost 20 billion US dollars. It was fully completed in 1994 and has the ability to carry out all-round real-time 3D navigation and positioning in sea, land and air. A new generation of satellite navigation and positioning system. The use of Chinese surveying and mapping departments in the past 10 years has shown that GPS has won the trust of the majority of surveying and mapping workers with its all-weather, high-precision, automation, and high-efficiency features. It has been successfully used in geodesy, engineering survey, aerial photogrammetry, Various disciplines such as vehicle navigation and control, crustal movement monitoring, engineering deformation monitoring, resource survey, and geodynamics have brought a profound technological revolution to the field of surveying and mapping.
Global Positioning System (GlobalPosiTIoningSystem, abbreviated GPS) is the second generation satellite navigation system in the United States. It was developed on the basis of the meridian satellite navigation system, which adopted the successful experience of the meridian system. Like the meridian system, the global positioning system consists of three parts: the space part, the ground monitoring part and the user receiver.
According to the current plan, the space part of the global positioning system uses 24 satellites with a height of about 20,200 kilometers to form a satellite constellation. The 21 + 3 satellites are all near circular orbits, with an operating period of about 11 hours and 58 minutes, distributed on six orbital planes (four per orbital plane), with an orbital inclination of 55 degrees. The distribution of satellites makes it possible to observe more than four satellites at any time anywhere in the world, and can maintain a geometric figure (DOP) with good positioning and resolution accuracy. This provides continuous global navigation capability in time.
The ground monitoring part includes four monitoring rooms, an upstream injection station and a main control station. The monitoring station is equipped with a GPS user receiver, an atomic clock, sensors to collect local meteorological data, and a computer for preliminary data processing. The main task of the monitoring station is to obtain satellite observation data and transmit these data to the main control station. The main control station is located at Vandenberg Air Force Base. It exercises overall control of the ground monitoring department. The main task of the main control station is to collect all the observation data of the GPS satellites from each monitoring station, and use these data to calculate the correction value of the orbit and satellite clock of each GPS satellite. The upward injection station is also located at Vandenberg Air Force Base. Its mission is mainly to inject such navigation data and commands from the main control station into the satellites when each satellite is in the sky. This injection is performed once a day for each GPS satellite, and the final injection is made before the satellite leaves the injection station.
The global positioning system has the characteristics of good performance, high precision and wide application, and is the best navigation and positioning system to date. With the continuous improvement of the global positioning system, the continuous improvement of hardware and software, the application field is constantly expanding. At present, it has spread to various sectors of the national economy and has gradually penetrated into people's daily life.
The Global Positioning System (GlobalPosiTIoningSystem-GPS) was developed by the United States since the 1970s. It took 20 years and cost 20 billion US dollars. It was fully completed in 1994 and has the ability to carry out all-round real-time 3D navigation and positioning in sea, land and air. A new generation of satellite navigation and positioning system. The use of Chinese surveying and mapping departments in the past 10 years has shown that GPS has won the trust of the majority of surveying and mapping workers with its all-weather, high-precision, automation, and high-efficiency features. It has been successfully used in geodesy, engineering survey, aerial photogrammetry, Various disciplines such as vehicle navigation and control, crustal movement monitoring, engineering deformation monitoring, resource survey, and geodynamics have brought a profound technological revolution to the field of surveying and mapping.
Global Positioning System (GlobalPosiTIoningSystem, abbreviated GPS) is the second generation satellite navigation system in the United States. It was developed on the basis of the meridian satellite navigation system, which adopted the successful experience of the meridian system. Like the meridian system, the global positioning system consists of three parts: the space part, the ground monitoring part and the user receiver.
According to the current plan, the space part of the global positioning system uses 24 satellites with a height of about 20,200 kilometers to form a satellite constellation. The 21 + 3 satellites are all near circular orbits, with an operating period of about 11 hours and 58 minutes, distributed on six orbital planes (four per orbital plane), with an orbital inclination of 55 degrees. The distribution of satellites makes it possible to observe more than four satellites at any time anywhere in the world, and can maintain a geometric figure (DOP) with good positioning and resolution accuracy. This provides continuous global navigation capability in time.
The ground monitoring part includes four monitoring rooms, an upstream injection station and a main control station. The monitoring station is equipped with a GPS user receiver, an atomic clock, sensors to collect local meteorological data, and a computer for preliminary data processing. The main task of the monitoring station is to obtain satellite observation data and transmit these data to the main control station. The main control station is located at Vandenberg Air Force Base. It exercises overall control of the ground monitoring department. The main task of the main control station is to collect all the observation data of the GPS satellites from each monitoring station, and use these data to calculate the correction value of the orbit and satellite clock of each GPS satellite. The upward injection station is also located at Vandenberg Air Force Base. Its mission is mainly to inject such navigation data and commands from the main control station into the satellites when each satellite is in the sky. This injection is performed once a day for each GPS satellite, and the final injection is made before the satellite leaves the injection station.
The global positioning system has the characteristics of good performance, high precision and wide application, and is the best navigation and positioning system to date. With the continuous improvement of the global positioning system, the continuous improvement of hardware and software, the application field is constantly expanding. At present, it has spread to various sectors of the national economy and has gradually penetrated into people's daily life.
These are the motors of Vacuum Cleaner. In the motors,there are some different styles. But they have a common point that is new type energy saving. This characteristic let vacuum cleaner is more easily use. These motors are all having rated voltage from 100V to 240V. They are all having rated power that is from 200W to 2000W. The rated voltage and rated power will change by different styles. Their rated frequency are all 50HZ or 60HZ. Their motors' total length, insulation grade,maximum vacuum degree and maximum quantity of wind will change by different kinds of motors. Now please see some pictures of motors blow.
Vacuum Cleaner Motor, Electric Motor, PG Motor, DA Motor
Ningbo ChinaClean Household Appliances Manufacture Co., Ltd. , https://www.chinaclean-elec.com