摘要
为了提高复杂、多样的农田信息检测效果,运用通用化设计概念和高性能硬、软件技术方案,设计了一种便携式、可配置的农田信息检测终端。采用主流的ARM Cortex-A8嵌入式处理器与Android操作系统相结合的一体化架构,集成AD、232、485、USB传感器接口,按键、触摸屏、液晶屏人机交互模块,SD卡、USB、3G、Wi Fi、Bluetooth数据交换模块,北斗/GPS双模定位模块以及电源/电量计模块,定制、移植核心驱动程序和HAL库层、JNI接口层。测试及应用试验表明,检测终端可选择配接或同时配接模拟/数字式、电流/电压型以及视频/图像摄像头等多种类型传感器,实现对土壤及大气参数、作物图像和地理信息的采集,并具有多种模式的数据展示和交换功能;模拟信号检测误差小于0.669 5%,3G无线通信下载速率达1 248 Kb/s,整机最大功耗小于3.6 W,检测终端外观尺寸152 mm×83 mm×34 mm,整机质量仅330 g。该检测终端易于配置或二次开发,使用方便,满足农田信息的全面、高效和精准检测需求。
In order to improve the detection performance on the increasing complex and diverse farmland information, a portable and configurable farmland information detection terminal was developed using a solution of high performed software and hardware based on the notion of universal design. An all-in-one framework which combines the mainstream embedded processor of ARM Cortex - A8 S5PV21 and the popular Android 4.0 operating system was adopted in this device. The key interfaces and modules include sensor interfaces of AD/232/485/USB, human - machine interaction modules of push-button/multi point capacitive touch screen/HD IPS LCD screen, data exchange modules of SD Card/USB/3G/WiFi/ Bluetooth, dual mode positioning module of Beidou/GPS, and power supply/electric meter module. The core drivers, HAL library ＆ JNI interfaces layer were customized or translated in the software to facilitate software development. Test and application showed that the proposed terminal was successfully configured with options of multiple sensors, such as analog/digital, current/voltage and video/image cameras, which demonstrated good capability of acquiring information on the soil and atmospheric parameters, crop images and geography, and had rich functionality of data presentation and exchange with multiple modes. The detection error of analog signal was less than 0. 669 5%, the download rate of 3G wireless communication was as fast as 1 248 Kb/s, and the maximum power consumption of the whole device was less than 3.6 W. The outline dimension was 152 mm × 83 mm ×34 mm, and the weight was only 330 g. The detection terminal was easy in configuration, or in secondary development, and can be conveniently applied in farmland. The proposed terminal fully meets the need of farmland information acquisition in terms of comprehensiveness, high efficiency and accuracy.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2016年第11期294-300,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
安徽省科技攻关项目(1501031102)
安徽省自然科学基金项目(1508085MF110
1608085QF126)
农业部引进国际先进农业科学技术计划(948计划)项目(2015-Z44)
关键词
农田信息
检测终端
ARM
安卓系统
通用化
farmland information
detection terminal
ARM
Android system
general utilization
