Dairy farming in Japan has low milk supply and reproductive rate per cattle, which is considered to be due to lack of proper breeding management. In order to solve this problem, there is a demand for a breeding management system that does not require human intervention, utilizing the ICT and robot technology. Studies on cow health and breeding management using various sensors have been reported; in this paper, we develop the system to collect the amount of activity and position of the grazing cattle in vast land. The developed system is (i) the “cattle sensor” composed of a GPS module and an acceleration sensor and (ii) the data transfer system composed of a wireless module and solar cells. The cow sensor can be used continuously for 2 months without battery replacement and is a system that can be used in vast land and mountain areas. And the data obtained from the sensor suggest the possibility of estrus detection.

中文翻译：

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广阔土地上放牧牛活动采集系统的开发

日本的奶牛场牛奶供应和每头牛的生殖率低，这被认为是由于缺乏适当的育种管理所致。为了解决该问题，需要一种利用ICT和机器人技术的，不需要人工干预的育种管理系统。已有关于使用各种传感器的母牛健康和育种管理的研究报告。在本文中，我们开发了一种系统来收集广阔土地上放牧牛的活动量和位置。开发的系统是（i）由GPS模块和加速度传感器组成的“牛传感器”，以及（ii）由无线模块和太阳能电池组成的数据传输系统。牛传感器可以连续使用2个月而无需更换电池，该系统可以在广阔的土地和山区使用。