A single-frequency GPS direction-finding system and its direction-finding positioning method
A direction-finding system and GPS receiver technology, applied in the field of GPS direction-finding systems, can solve the problems of difficult expansion and high cost, and achieve the effects of no cumulative error, low cost and easy portability
Active Publication Date: 2015-09-16
重庆九洲星熠导航设备有限公司
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Problems solved by technology
[0004] In order to overcome the defects of high cost and difficult expansion of the traditional attitude measurement system, a single-frequency GPS real-time heading measurement system based on ARM 9 processor S3C2440 is designed, which has the advantages of low cost, modularization, and high integration
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[0032] see figure 1 The single-frequency GPS direction-finding and positioning system of the present invention includes a GPS receiver 12 , a GPS receiver 13 , a master antenna 10 , a slave antenna 11 , an ARM9 processor 14 , and a power supply module 15 . The GPS receiver 12 includes a connected main antenna 10, which is connected to the ARM9 processor through the serial port 1, and uses the pseudo-range positioning method to solve the position and velocity of the main antenna 10 during use as reference coordinates. Then take this coordinate as the origin of the coordinate system, the distance between the main antenna 10 and the slave antenna 11, that is, the length of the baseline is the radius, and a spherical coordinate space is constructed, and the pseudo-range of the satellite observed by the antenna 11 is passed through the spherical space. and the integer number of weeks are calculated to obtain the search interval of the double-difference integer number of weeks. The...
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The invention provides a single-frequency GPS (Global Positioning System) direction-finding system. The single-frequency GPS direction-finding system is composed of a double-GPS receiver, double antennae, an ARM 9 processor and a host computer, wherein the double-GPS receiver is respectively connected with the main antenna and the auxiliary antenna. A direction-finding and positioning method comprises the following steps: the position and the speed of the main antenna can be calculated and are used as a reference coordinate, the coordinate is used as a center of a coordinate system for constructing a spherical coordinate space, the spherical coordinate space is used as a searching area for double-differential integers, and two-dimensional attitude information of a carrier can be determined by utilizing a direction vector between the main antenna and the auxiliary antenna after an integer ambiguity is determined. The invention has the advantages of low cost, convenience for carrying, flexibility in installation and high measuring accuracy, and can be widely used for aerospace measurement, accurate landing, geography attitude measurement, attitude or heading measurement of an automotive and a boat, and the like.
Description
technical field [0001] The invention relates to a GPS direction-finding system, in particular to a single-frequency GPS direction-finding system for direction-finding and positioning and a direction-finding and positioning method thereof. Background technique [0002] Attitude measurement is one of the key technologies in aviation, aerospace, navigation and land navigation systems. With the rapid development of GPS technology, using GPS to form an attitude measurement system to measure the attitude parameters of the carrier has quickly become an important research direction. [0003] Traditional attitude measurement systems are mainly based on photoelectric attitude sensors, magnetometers, accelerometers, and gyroscopes. These measurement systems are autonomous systems with good autonomy, but their shortcomings are also obvious. The photoelectric attitude sensor is greatly affected by the external environment and is easily disturbed during the measurement process. The iner...
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IPC IPC(8): G01S19/53G01S19/55
Inventor 不公告发明人
Owner 重庆九洲星熠导航设备有限公司