Design of universal agricultural monitoring system based on MIPS

introduction

Pervasive computing is also called universal computing and popular computing. It emphasizes ubiquitous computing that is integrated with the environment. In ubiquitous computing, computers disappear from people's eyes, and instead use various embedded devices as the core of computing. Through sensors and wireless networks, users can obtain and retrieve information in any way at any time and any place. deal with. The combination of ubiquitous computing and information agriculture has promoted the development of the facility agricultural production model. In this model, the system summarizes and calculates based on the obtained data, and adjusts the environment of the agricultural production site. The over-reliance of crop growth on the natural environment makes crop growth highly productive, efficient, and high-quality, and its degree of development reflects the level of agricultural modernization in a country. This article takes the MIPS architecture JZ4755 and PIC32MX4 series processors as the core, and develops the data collection, analysis, monitoring and early warning system in pervasive agriculture. The system realizes the collection and calculation of environmental data under the condition of low power consumption and small volume, and can analyze and process according to the acquired data.

1 Overall system structure

The whole system consists of two main parts: branch monitoring point and main control terminal. The branch monitoring point uses PIC32MX460 as the processing unit, and the peripheral devices have a light sensor, a temperature sensor, a humidity sensor, etc. Its completed functions include real-time monitoring and recording of current environmental data such as light intensity, temperature, and humidity. The main control terminal takes the domestic JZ4755 processor as the core, and the peripheral devices include network communication module, SD card storage module, GPRS communication module, etc. Its completed function is to integrate the data obtained from each branch monitoring point, and give decision-making opinions according to the crop growth rules At the same time, the data recorded in each stage is stored in the SD card module; a Web server is also built into the main control terminal. When connected to the network, the user can query the current status of the system anywhere. When the crop growth environment is abnormal, the main control terminal can also send a warning message to the user through the GPRS communication module to avoid greater losses. The information exchange between the main control terminal and the branch monitoring point is completed by 433 MHz wireless communication, which not only avoids the cumbersome wiring caused by wired communication, but also has a faster data transmission rate and good stability. The overall block diagram of the system is shown in Figure 1.

Compared with current popular embedded processors, MIPS processors have the characteristics of low power consumption and high performance.

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