| 摘要 |
FIELD: agriculture. ^ SUBSTANCE: device comprises three serially coupled layers that are tightly joined. Upper layer is arranged as non-transparent and light-absorbing, middle layer - in the form of heat accumulator, material of which has alternating heat conductive properties, and lower layer is arranged as highly heat-conducting. Device contains temperature sensor in the form of controlling thermocouple installed into protected ground and connected to heat accumulator. ^ EFFECT: device makes it possible to automate monitoring, control and maintenance of required temperature condition of protected ground. ^ 3 dwg |
