Antifreeze automatic insulation system for wind direction recorder

The role of automatic meteorological stations in China's agricultural production has become more and more evident, especially in the application of greenhouse equipment agriculture. However, in winter in southern China, there are many low-temperature freezing and freezing weather, which leads to the freezing of the wind direction recorder of the automatic meteorological observing station, resulting in errors such as missing data. In order to prevent this kind of error, we solve the problem from the sensor selection and the use of thermal insulation and anti-freezing: (1) The sensor should have a heating device or can be installed with a thermal insulation device; (2) Use a suitable heating insulation method. Corresponding solution is: for the first point, first select the heating function, or to facilitate the installation of an external heating device on the outside of the sensor series; for the second point, the best way is to electric heating. It is both easy and reliable, durable, and can be designed specifically for the use of heating control systems.

When designing the wind speed recorder, it highlights the automatic and thermostatic control functions. Taking into account outdoor use, it should also meet the requirements of safety, reliability and easy maintenance. The control system consists of temperature-controlled switches, step-down transformers, PID function temperature control instruments, solid state relays, heaters and temperature measuring elements. Its main parts include ambient temperature detection, intelligent temperature control instrumentation, solid state relays, heaters, temperature measurement platinum thermal resistance five parts, which together constitute a closed-loop temperature control system, complete the function of temperature control. The temperature control switch is adjustable around 10°C. It detects the ambient temperature and completes the automatic heating and heat preservation function.

Need to explain, because the weather is cold, and the wind direction recorder has small heater power (only 25W), so there is no cooling method such as water cooling or fan forced cooling, but the ambient air can be naturally cooled. For heaters that need to be installed, we recommend 24V electric heating with automatic temperature control heaters wound on the sensor, or the use of custom-made circular plate heaters, the specific power can choose about 50-100W, and then, with plastic Insulation tape can be wrapped around the package. If you choose to use electric heating automatic temperature control heating products, you can refer to the design and use instructions of domestic temperature control heating cable.

The wind direction recorder uses an automatic anti-freeze insulation control system, which can solve the freezing and freezing of the wind direction recorder and ensure the accuracy of the observation data. However, in Guanyang County where the automatic antifreeze heat preservation control system is not used, the wind direction and the wind speed sensor are frozen and frozen, causing the wind direction and wind speed data to be missed for a long time.

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