High-precision multi-channel temperature control system

Abstract

The invention discloses a high-precision multi-channel temperature control system, which comprises a temperature acquisition module, a PID module, a refrigeration module, an MUC control module and a PWM output control module, wherein the temperature acquisition module comprises at least two groups of NTC thermistors, the refrigeration module comprising at least two groups of TEC refrigerators, the TEC refrigerator / heaters are in one-to-one correspondence with the NTC thermistors, and the NTC thermistors are installed at different parts of a laser device. According to the high-precision multi-channel temperature control system, the plurality of NTC thermistors can be installed at different parts of the laser device for sensing temperature variation of the different parts, the MCU control module, the PID module and the PWM output control module can be used for processing the temperature variation of each NTC thermistor independently and then transmitting the results to the corresponding TEC refrigerator / heaters, each refrigerator is used for refrigerating or heating independently according to the temperature variation of the corresponding thermistor, the effects of refrigerating and heating different parts of the laser device at the same moment as well as refrigerating or heating the same part at different moments can be achieved, and precise temperature control of each part of the laser device is achieved.

Description

technical field [0001] The invention relates to the field of laser machine temperature control, in particular to a temperature control system with multiple temperature channels and capable of controlling the laser machine in a large range with high precision. Background technique [0002] Semiconductor lasers play an irreplaceable role in military, medical, communication and other fields due to their high efficiency, small size, light weight, and low price. Since this type of laser needs to maintain a high and stable constant temperature state to ensure its output power and wavelength, the laser is more stable. Therefore, designing a temperature control system with high integration, small size and high stability has become an urgent problem to be solved. [0003] The temperature control systems of lasers in the market are mostly single-channel systems. For example, the patent document of the authorized announcement CN103076827A discloses a high-precision temperature control...

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Problems solved by technology

[0004] Through the adjustment of the PID circuit, the temperature in a small range is finally the same as the set temperature, and it remains stable all the time, and the temperature control speed is fast and accurate; but the system has only one thermistor, and the temperature of different parts of the laser The changes are different, and the temperature control requirements of different parts are also different. Some parts need to be heated, and some parts need to be cooled. At the same time, the system can only heat or cool down. range of temperature control

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