Dual-CPU embedded navigation computer

Abstract

The invention provides a dual-CPU embedded navigation computer, composed of a MCU module, a PC104 module, an A / D conversion module, a dual-port RAM data share module, a complex programmable logic device decoding module and a serial communication interface module. The IMU inertial sensor information is processed by A / D conversion into digital values to be input into the MCU module, buffered by the dual-port RAM and fed into the PC104; GPS and electronic compass navigation information are directly fed into the PC104 via interface circuit to process navigation data fusion, the calculation result is transmitted to external system via interface circuit or visually displayed via a man-machine interaction interface of the system; the data acquisition is completed under the combination control of the MCU module and the CPLD decoding module. The invention has the advantages that: (1) the dual-CPU embedded navigation computer has high navigation information processing speed; has many data acquisition channels; (3) has strong communication ability; (4) has small volume low cost, high reliability, simple operation and simple man-machine interaction.

Description

(1) Technical field [0001] The invention relates to a navigation computer, specifically a dual-CPU navigation computer composed of a micro control unit (MCU) and an embedded industrial control computer PC104, which is suitable for processing a navigation system in which multiple navigation information is fused. (2) Background technology [0002] With the continuous development of navigation technology, various navigation systems are more and more widely used in military and civilian fields. The navigation computer is one of the most important parts of the navigation system. It is not only the calculation and processing center of navigation data, but also the control center of data collection, and it is also responsible for the communication between the system and external devices. Many current navigation systems adopt integrated navigation methods. At this time, a large amount of sensor information needs to be collected, the navigation calculation process is complicated, and...

AI Technical Summary

Problems solved by technology

During the system work, the time-division multiplexing of the analog / digital (A / D) conversion chip is completed through the CPU programming control sequence, so that the data collection control consumes a lot of CPU resources, prolongs the cycle of CPU processing data, and seriously affects the navigation computer. speed, reducing the real-time performance of the navigation system

In addition, the data calculation of navigation information is also a complicated process. A large amount of data information needs to go through a series of time-consuming mathematical operations to obtain navigation parameters such as azimuth, attitude, speed and position.

In one CPU, data collection control and data calculation are completed sequentially. Therefore, the CPU cannot perform navigation calculation while performing data collection control, and cannot control data collection while navigating and calculation. Two complicated and time-consuming processes Process serialization will inevitably reduce the speed of navigation calculations and affect the performance of the navigation system

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