Realization of scientific and technological achievements in the measurement of temperature-type frozen soil automatic observation instrument in Liaoning Province

[ China Instrument Network Instrument R & D ] As the saying goes: "Frozen three feet, not a cold day." In northern China, winter temperatures are often below 0 ° C, wet soil is frozen, this phenomenon is called meteorology For frozen soil.

Frozen soil observation refers to the observation of soil freezing time, freezing level and its upper and lower depths, freezing time and freezing degree. China's permafrost area is about 2.148 million square kilometers, mainly concentrated in the Qinghai-Tibet Plateau and the Xing'an Mountains. Frozen rustic image observation data is of great significance for construction, engineering construction, transportation and farmland water conservancy construction.

The depth of frozen soil is closely related to agricultural activities, buildings, roads and bridges, railway design, etc. Frozen soil observation is also one of the basic observation tasks of meteorological stations with soil freezing in China. The depth observation of frozen soil in China is currently based on manual observation. This method is labor intensive, and the freezing judgment and observation results are easy to differ.

On December 3, it was learned from the Liaoning Provincial Meteorological Bureau that the Liaoning Meteorological Equipment Support Center and the Central Tianyi (Tianjin) Meteorological Instrument Co., Ltd. signed an agreement to officially transfer the temperature-measuring frozen soil automatic observation instrument technology and equipment. This has achieved a new breakthrough in the transformation of Liaoning meteorological science and technology achievements.

Since 2013, the Liaoning Meteorological Bureau has designed and developed a temperature-based automatic observation instrument for high-temporal resolution frozen soil, which was completed and accepted in September this year. The detection depth ranges from 0.5 m to 4.5 m.

The temperature-measuring frozen soil automatic observation instrument developed by the Liaoning Meteorological Equipment Support Center adopts a 12-digit digital single-bus temperature sensor. The temperature sensor is placed every 1 cm in the vertical direction, and the temperature data of each point is obtained every minute to obtain the frozen soil. The upper and lower limits and depth data are used in industrial and agricultural production to provide data support for accurate temperature forecasting. Moreover, the equipment technology is mature and stable, the traceability is convenient, and the anti-interference ability is strong, which can be applied to the needs of different depths of frozen soil in the north and south of China.

(Source: Baidu Library, China Meteorological News, Liaoning Daily)