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Temperature measurement system and temperature measurement method

A temperature measurement and measurement point technology, applied in thermometer testing/calibration, thermometers, thermometers with physical/chemical changes, etc., can solve the problem that the measurement has not been established

Active Publication Date: 2014-06-11
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in temperature measurement using optical fibers, it is relatively easy to measure temperature in a wide range with high precision, but a method for measuring temperature in a narrow range such as servers in data centers with high precision has not yet been established.

Method used

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  • Temperature measurement system and temperature measurement method
  • Temperature measurement system and temperature measurement method
  • Temperature measurement system and temperature measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0214] Such as Figure 22 As shown, an optical fiber 24 is laid on the exhaust side door of the server rack 11 . That is, arrange the winding portions 24x, 24y of the optical fiber 24 at the same position in the access floor, and lead the optical fiber 24 between the winding portions 24x, 24y into the frame 11 and lay it back and forth along the exhaust valve from bottom to top. Figure 22 The symbol 241 in the figure shows the optical fiber on the outbound side, and the symbol 242 shows the optical fiber on the incoming side. In addition, for comparison, a plurality of thermoelectric pairs were arranged along the optical fiber 24, and the temperature distributions of the rack 11 and the access floor were also measured by these thermoelectric pairs.

[0215] Figure 23The graph shows the temperature distribution measured by the thermoelectric pair, the temperature distribution measured by the optical fiber temperature measurement system 20 (before correction), and the correc...

Embodiment 2

[0218] Such as Figure 24 As shown, fiber optics 24 are laid on the exhaust side doors of the server racks. That is, the optical fiber 24 windings 24x, 24y are arranged at the same position in the access floor, and the optical fiber 24 between the windings 24x, 24y is led out into the frame 11 and laid back and forth along the exhaust valve from bottom to top. However, optical fiber winding sections A, B, C, and D are arranged at positions corresponding to exhaust ports of four servers (not shown) mounted in the rack on the way out. In addition, the optical fiber of the incoming route is laid so that the portions other than the winding portions A, B, C, and D and their vicinity pass through the same position as the optical fiber of the outgoing route. Furthermore, for comparison, a plurality of thermoelectric pairs were arranged along the optical fiber 24, and the temperature distributions of the rack 11 and the raised floor were also measured by these thermoelectric pairs. ...

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Abstract

[Object] To measure a temperature with high accuracy by a temperature measurement system and a temperature measurement method. [Solving Means] The object is achieved by a temperature measurement system including: a laser light source 21 configured to output laser light; an optical fiber 24 installed in a temperature measurement area; and a temperature measurement unit 27 configured to acquire a measured temperature distribution of a temperature of the temperature measurement area along an installation path of the optical fiber 24 by detecting backscattered light of the incident laser light in the optical fiber 24 and to calculate a corrected temperature distribution by correcting the measured temperature distribution, wherein the temperature measurement unit 27 sequentially makes a correction for the measured temperature distribution a plurality of times so as to make a square error between a convolution of a transfer function of the optical fiber 24 along the installation path and the corrected temperature distribution and the measured temperature distribution smaller in each of the corrections, and the temperature measurement unit also replaces a corrected temperature at a specific point of the installation path with an estimated temperature at the specific point in each of the corrections.

Description

technical field [0001] The present invention relates to a temperature measuring system and a temperature measuring method. Background technique [0002] In a computer room or an Internet data center (IDC), the amount of heat generated by electronic devices such as servers tends to increase rapidly with the increase in density of electronic devices such as servers, and it is desired to appropriately cool these electronic devices. [0003] As a method of cooling electronic equipment, for example, there is a method of controlling airflow in a room in order to prevent excessive heat accumulation, or a method of cooling a room with an air conditioner. [0004] In order to maintain an optimum cooling state in the room at all times through these methods, it is effective to always monitor the temperature test points in the room. In particular, if the three-dimensional temperature distribution in the room can be grasped, it is possible to maintain an optimum cooling state in the roo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/12
CPCG01K2011/324G01K15/00G01K11/32G01K11/324
Inventor 笠屿丈夫宇野和史武井文雄
Owner FUJITSU LTD