Method and device for controlling temperature based on thermoelectric refrigerating unit
A temperature control method and technology of thermoelectric coolers, applied to circuits, lasers, electrical components, etc., can solve the problems of inability to adjust the current flowing through thermoelectric coolers, long time required for temperature control, and low control efficiency, etc., to achieve The effect of reducing time, improving control accuracy and improving control efficiency
Active Publication Date: 2013-07-17
HISENSE BROADBAND MULTIMEDIA TECH
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[0010] It can be known from the above that the current thermoelectric cooler controls the temperature by controlling the direction of the current flowing through the thermoelectric cooler through the PWM signal. The current flowing through the thermoelectric cooler is relatively constant, and the magnitude of the current flowing through the thermoelectric cooler cannot be adjusted. The time required for control is longer and the control efficiency is lower
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[0052] The technical solutions of the various embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0053] The present invention proposes a temperature control device based on a thermoelectric cooler. Compared with the device in the prior art that only controls the current direction of a thermoelectric cooler by controlling the PWM signal, the present invention adds a DC converter (DC / DC), Therefore, it cooperates with the output PWM signal to jointly control the current direction and magnitude of the thermoelectric cooler, so that the temperature control accuracy is higher.
[00...
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The invention discloses a method and a device for controlling the temperature based on a thermoelectric refrigerating unit. The method comprises the steps of A, receiving the sensed temperature of an electric-absorption modulated laser, judging whether the received temperature is lower than a preset temperature threshold or not, executing Step B if the received temperature is lower than the preset temperature threshold, executing Step C if the received temperature is higher than the preset temperature threshold, and executing Step D if the received temperature equals to the preset temperature threshold; B, outputting voltage reduction information to a direct current converter, and triggering and reducing voltage at one end of the electric-absorption modulated laser which is connected with the direct current converter; C, outputting voltage boosting information to the direct current converter, and triggering and boosting the voltage at one end of the electric-absorption modulated laser which is connected with the direct current converter; and D, outputting voltage default information to the direct current converter, and triggering and adjusting the voltage at one end of the electric-absorption modulated laser which is connected with the direct current converter to a preset default value. By the aid of the method and the device, the time required for temperature control can be reduced, and the control efficiency can be improved.
Description
technical field [0001] The invention relates to thermoelectric control technology, in particular to a temperature control method and device based on a thermoelectric cooler. Background technique [0002] In order to realize the transmission of data on the optical fiber, the data needs to undergo electro-optical conversion and photoelectric conversion through the optical fiber transceiver. Among them, electro-optic conversion is accomplished by semiconductor lasers. [0003] According to different modulation methods, semiconductor lasers are mainly divided into direct modulation lasers and external modulation lasers. [0004] Electro-absorption Modulated Laser (EML, Electro-absorption Modulated Laser) is a kind of externally modulated laser, which can better adapt to long-distance and high-speed optical transmission. And because of its good spectral characteristics, fast response speed, low power consumption and other characteristics, it is widely used in the field of optic...
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Inventor 胥嫏
Owner HISENSE BROADBAND MULTIMEDIA TECH