Multi-temperature zone calibration method based on internal hollow type temperature control member

A temperature control, multi-temperature zone technology, used in thermometers, thermometer testing/calibration, thermometers with physical/chemical changes, etc., can solve problems such as difficulty in ensuring uniform temperature, inaccurate benchmarks, and poor linearity

Inactive Publication Date: 2015-04-08
TUOPU INTELLIGENT INSTR & GAUGE ZHUHAI
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Problems solved by technology

[0005] The temperature calibration method of this method is relatively simple, but there are serious defects and deficiencies: First, because there is a certain gradient in the temperature field in the insulation box, it is difficult to ensure uniform temperature, and it is difficult for the single reference temperature collected at one time to fully reflect the reference optical fiber temperature. In the temperature field, due to the inaccuracy of the reference, the accuracy of the temperature measurement is reduced; secondly, because the light intensity ratio (ab

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  • Multi-temperature zone calibration method based on internal hollow type temperature control member
  • Multi-temperature zone calibration method based on internal hollow type temperature control member
  • Multi-temperature zone calibration method based on internal hollow type temperature control member

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[0032] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention.

[0033] A multi-temperature zone calibration method based on the hollow temperature control. Three sections of optical fiber at different positions of the optical fiber are selected to be wound on three hollow copper pillars, and the temperatures of the three copper pillars are respectively set to T 1 =-20℃,T 2 =40°C, T 3 = 120°C, of ​​course T 1 The temperature can be selected between -20 ° C ~...

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Abstract

The invention discloses a multi-temperature zone calibration method based on an internal hollow type temperature control member. A multi-segment broken line relationship of temperatures varying along with the light intensity ratio of anti-Stokes to Stokes is obtained by utilizing a segmentation calibration manner while adopting an internal hollow type copper cylinder as the main body of a temperature control system, so that a temperature calibration curve infinitely approaches an index changing curve of the light intensity ratio of anti-Stokes to Stokes and the temperature. Under the precondition that the method does not influence the system performance, the temperature measurement accuracy of a system is further improved, the applicable temperature measurement range of the system is extended, and the defects and disadvantages of an existing temperature calibration manner are better overcome.

Description

technical field [0001] The invention relates to a distributed optical fiber temperature measurement technology, in particular to a multi-temperature zone temperature automatic calibration method for distributed optical fiber temperature sensing. Background technique [0002] The distributed optical fiber temperature measurement system is mainly used in temperature monitoring and fire detection in large spaces, such as electric power, railways, highway tunnels, cable trenches, warehouses, oil fields, oil pipelines and other places, for the safe operation of equipment places and personnel life and property Security plays an important role. [0003] The distributed optical fiber temperature measurement system is mainly composed of temperature sensing optical cable, temperature calibration module, data acquisition module, data processing module and graphic display module. The temperature calibration module is an important part of the temperature sensing system. The advantages an...

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Application Information

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IPC IPC(8): G01K11/32G06F19/00G01K15/00
Inventor 杨术彬陈必茂葛翠艳李安兵
Owner TUOPU INTELLIGENT INSTR & GAUGE ZHUHAI
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