High-efficiency temperature control device for controlling the seeing effect of solar telescope primary mirror

Abstract

The present invention discloses an efficient temperature control device for solar telescope primary lens surface seeing effect control. The device comprises a primary lens, a lens surface sensor, a refrigeration set, a refrigeration machine external circulation cooling system, a surface cooler, a pumping pump, a fan, an electric heater, a sealed box, a controller and an environment temperature measurement device. The goal of the temperature control device is to carry out temperature control of the primary lens, thus the measurement value of the lens surface sensor is consistent with the measurement value of the environment temperature measurement device, and thus the purpose of controlling a lens surface seeing effect is achieved. Specifically the temperature control of the primary lens surface is realized by controlling the power of the electric heater and the cooling medium refrigeration temperature of the refrigeration set by the controller. Through the surface cooler, the contact area of a cooling medium is increased, the heat exchange efficiency is raised through blowing of the fan, the cold and heat loss is reduced through the sealed box, and the control response efficiency of the primary lens surface temperature is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of temperature control of large-diameter telescopes, and in particular relates to an efficient temperature control device for controlling the seeing effect of a primary mirror of a solar telescope. Background technique [0002] With the development of astrophysics and the continuous advancement of engineering technology, researchers have put forward higher requirements for the resolution of telescope observations, which also means that larger-caliber telescopes need to be built to continuously improve the ability to observe various celestial bodies. However, as the aperture of the telescope increases, the complexity and difficulty of its design and construction also increase significantly. One of the most difficult problems is the control of the seeing effect of the primary mirror. For ground-based large-aperture telescopes, even a very small increase in the surface temperature of the primary mirror will cau...

AI Technical Summary

Problems solved by technology

[0005] 1. There is generally a long distance between the peripheral independent refrigerator and the main mirror, and it needs to be transported and recovered through the refrigerant pipeline. This process will lead to serious loss of cooling capacity, generally more than 90%, and the refrigeration power utilization rate of the refrigerator is extremely high. low, which puts strict requirements on the development of refrigerators

[0006] 2. There is generally a long distance between the peripheral independent refrigerator and the main mirror, which severely restricts the response speed of the temperature control of the main mirror

Generally, the transmission speed of the temperature signal of the primary mirror and the control signal of the controller is much higher than the transmission speed of the refrigerant. When the refrigerant of the refrigerator is transported to the surface cooler at the rear end of the primary mirror, the mirror surface temperature of the primary mirror and the ambient temperature have changed greatly. Cause the control response speed to be too slow or even control errors

[0007] 3. The fan is generally installed on the back of the main mirror and connected to the main mirror as a whole, so its vibration will cause assembly errors of the optical components of the solar telescope and reduce the imaging quality

The vibration of the fan generally occurs when the frequency is changed or the speed is changed. Therefore, the method of changing the heat exchange coefficient on the back of the main mirror by changing the fan speed often leads to vibration of the optical system, causing the image quality of the solar telescope to decline.

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