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

Abstract

The invention relates to a GNSS (global navigation satellite system) intermediate-frequency data and inertia measurement data combined collector which comprises a GNSS radio-frequency unit, an inertia measurement unit and an expansion sensor unit, wherein the GNSS radio-frequency unit is connected with a data combined collection unit and a baseband receiver unit through a bus interface unit respectively; the inertia measurement unit and the expansion sensor unit are connected with the data combined collection unit through the bus interface unit; a whole-second pulse output end of the baseband receiver unit is connected with the data combined collection unit; an output end of the data combined collection unit is connected with an input end of a data transmission unit; and an output end of the data transmission unit is connected with an input end of a data storage unit. The combined collector provided by the invention adopts three collection modes through a direct collection channel, a synchronous collection channel and an asynchronous collection channel, and can realize combined collection of the inertia measurement unit, the expansion sensor unit and GNSS intermediate-frequency data with multiple different output interfaces; and the collection result includes accurate GNSS time information and has the characteristics of good time synchronization result, flexible data format, strong compatibility and the like.

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

Images