Constant temperature box device based on distributed optical fiber temperature measuring system

Abstract

The invention discloses a constant temperature box device based on a distributed optical fiber temperature measuring system. The constant temperature box device comprises a calibration fiber (5), a wavelength division multiplexer (WDM) (7), an APD module (8) and a light source (10), and is characterized by further comprising a refrigeration sheet radiator (2), a refrigeration sheet (3), an insulating layer (4), a constant temperature box pure copper thickened inner wall (6), a constant temperature inner wall temperature sensor (9) and a radiator temperature sensor (11). The constant temperature box device has the following specific beneficial effects and advantages that 1, the size is small and the installation design is flexible; 2, the semiconductor refrigeration sheet is used as a corefor designing to reduce development cost; 3, the use requirements of the distributed optical fiber temperature measuring system with high standards can be met; 4, the constant temperature box device is of integrated box design and is convenient to maintain; 5, the constant temperature of the constant temperature box device can be automatically adjusted according to requirements, and the temperature range is (-10)-85 DEG C; 6, the constant temperature deviation of the constant temperature box device is + / -0.1 DEG C; and 7, the rate of temperature rising and the rate of temperature fall are high, and the rate of temperature rising is 3 DEG C / min and the rate of temperature fall is 2 DEG C / min.

Description

technical field [0001] The invention relates to a constant temperature box device and a design method based on a distributed optical fiber temperature measurement system, especially a device based on a temperature reference to ensure constant internal temperature, so that the device or device can work in a constant temperature environment. This system is mostly used in the distributed optical fiber temperature measurement system to stabilize the temperature of the internal constant temperature reference optical fiber of the distributed optical fiber temperature measurement host and compensate the temperature offset and optical path loss deviation of APD, WDM, and light source. Background technique [0002] With the continuous expansion of the field of optical fiber sensing technology, the distributed optical fiber temperature measurement system has developed rapidly. The distributed optical fiber temperature measurement system is based on a long-distance, high real-time, and...

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Problems solved by technology

At the same time, the change of ambient temperature also affects the stability of the output power of the laser. The photodiode in the APD module contains a very high gain. The gain of the APD module is extremely sensitive to the change of the ambient temperature. Tox's signal strength, which affects the temperature measurement accuracy

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