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Multi-thermocouple assembled temperature sensor and measurement correction algorithm thereof

A technology of temperature sensors and thermocouples, applied to thermometers, thermometers, and measuring devices that use directly heat-sensitive electric/magnetic elements, can solve the problem that fine thermocouples are easy to bend or even shortened, and cannot reflect fire temperature turbulent fluctuations , unable to obtain temperature transient information and other issues

Pending Publication Date: 2017-09-15
NANJING UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, for the temperature measurement of fire or similar high-temperature air flow, fine thermocouples are easy to bend or even shorten, and the temperature readings of air-pumped thermocouples cannot reflect the turbulent fluctuation of fire temperature, and the temperature transient information cannot be obtained

Method used

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  • Multi-thermocouple assembled temperature sensor and measurement correction algorithm thereof
  • Multi-thermocouple assembled temperature sensor and measurement correction algorithm thereof
  • Multi-thermocouple assembled temperature sensor and measurement correction algorithm thereof

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Experimental program
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Embodiment

[0039] Embodiment: fire temperature measurement experiment, such as Figure 5 As shown, the experiment includes a temperature measurement acquisition system and a fire combustion simulation system. The composition of the temperature measurement acquisition system is: 8 is four bare thermocouple assembled temperature sensors (8a, 8b, 8c and 8d are K-type thermocouples with junction diameters of 0.23, 0.62, 0.85 and 1.77mm respectively), 9 is a fixed bracket , 10 is the data acquisition module, 11 is the data acquisition computer, 12 is the measurement location point; the composition of the fire combustion simulation system is: 13 is the combustion flame, 14 is the gas burner, 15 is the combustible gas conduit, 16 is the gas flow controller , 17 is a propane cylinder, 18 is a fireproof board, and 19 is a laboratory table.

[0040] The best working mode of the assembled temperature sensor: the sensor is facing the flow direction of the combustion plume, the thin thermocouple is ...

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Abstract

The invention relates to the technical field of temperature measurement for a fire or a similar high-temperature air flow, and specifically relates to a multi-thermocouple assembled temperature sensor and a measurement correction algorithm thereof. The multi-thermocouple assembled temperature sensor and the measurement correction algorithm thereof can be used for correcting an error brought about by thermocouple exposed nodes and environmental radiation heat exchange for thermocouple temperature measurement, and eliminate influences imposed on the correction process by turbulent fluctuations of a high temperature air flow based on a heat transfer theory and algorithm, so that the corrected temperature is enabled to be closer to the actual temperature of the air, and turbulent fluctuation conditions of the actual temperature can be provided.

Description

technical field [0001] The invention relates to the technical field of fire and similar high-temperature air flow temperature measurement, in particular to a multi-thermocouple assembled temperature sensor and a measurement correction algorithm. Background technique [0002] When bare thermocouples are used to measure the flame temperature of a fire, the temperature reading of the thermocouple is actually the temperature of the thermocouple junction, not the temperature of the combustion flame, and there is a large gap between the two (temperature measurement error). The reason for this temperature measurement error is that although the burning high-temperature flame heats the thermocouple junction through convective heat transfer, the thermocouple junction in the high temperature state conducts heat through the thermocouple wire and radiates heat with the surrounding cold environment. The heat is lost through heat transfer, and the heat loss through heat conduction can be r...

Claims

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Application Information

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IPC IPC(8): G01K7/10
CPCG01K7/10
Inventor 周魁斌
Owner NANJING UNIV OF TECH
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