GNSS (global navigation satellite system) intermediate-frequency data and inertia measurement data combined collector

Abstract

The invention relates to a joint collector of GNSS intermediate frequency data and inertial measurement data, comprising a GNSS radio frequency unit connected to a data joint acquisition unit and a baseband receiver unit through a bus interface unit, and an inertial unit connected to the data joint acquisition unit through a bus interface unit The measurement unit, the extended sensor unit, the whole-second pulse output end of the baseband receiver unit are connected to the data joint acquisition unit, the output end of the data joint acquisition unit is connected to the input end of the data transmission unit, and the output end of the data transmission unit is connected to the data storage unit connected to the input. The invention includes three acquisition methods: direct acquisition channel, synchronous acquisition channel and asynchronous acquisition channel, which can realize joint acquisition of inertial measurement unit with different output interfaces, extended sensor unit and GNSS intermediate frequency data, and the acquisition result has accurate GNSS time information , has the characteristics of good time synchronization effect, flexible data format and strong compatibility.

Description

technical field [0001] The invention relates to a combined data collector, in particular to a combined collector for GNSS intermediate frequency data and inertial measurement data. Background technique [0002] Global Positioning System GPS (Global Positioning System) is another major product dedicated to people all over the world by the US Department of Defense following the Internet. Since its advent, GPS has fully demonstrated its dominance in the field of navigation and positioning, and many fields have undergone revolutionary changes due to the appearance of GPS. With the rapid development of GLONASS, Galileo and BD-II, the performance of satellite positioning and navigation can be further improved, but it cannot overcome factors such as poor continuous positioning capability, low dynamic performance, susceptibility to interference, multipath and signal occlusion of GNSS satellite navigation itself Weaknesses of influence. [0003] In order to overcome the weakness of...

AI Technical Summary

Problems solved by technology

However, on the one hand, the data output methods of different models of IMUs from different manufacturers are different, not only asynchronous serial port output methods, but also synchronous parallel output methods that can supply sampling control signals externally, synchronous serial output methods that can supply sampling control signals externally, and The asynchronous serial output mode that cannot be controlled by the outside; on the other hand, the asynchronous data transmission mode seriously affects the synchronization effect of the joint acquisition of GNSS and IMU data

Therefore, the existing product solutions cannot meet the diverse needs of IMU and GNSS joint acquisition, especially the requirements of software deep combination research in terms of IMU type and accurate synchronization of acquisition time

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