A transient temperature measurement and calibration method and system
A technology of transient temperature and calibration method, applied in thermometer testing/calibration, thermometer, measuring heat, etc., can solve problems such as introducing errors, improve temperature measurement accuracy, improve installation stability and measurement accuracy, and ensure installation safety The effect of stability and accuracy of measurement
Active Publication Date: 2022-03-18
HUAZHONG UNIV OF SCI & TECH
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[0004] Aiming at the defects and improvement needs of the prior art, the present invention provides a transient temperature measurement and calibration method and system. The transient temperature measured by the thermocouple improves the temperature measurement accuracy and has high universality
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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0037] In the present invention, the terms "first", "second" and the like (if any) in the present invention and drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0038] figure 1 It is a flow chart of the transient temperature measurement and calibration method provided by the embodiment of the present invention. refer to ...
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Abstract
The invention discloses a transient temperature measurement and calibration method and system, which belong to the field of engine testing. The method comprises: acquiring the transient temperature measurement value of a thermocouple in an object to be measured; calculating the surface heat flow of the thermocouple according to the transient temperature measurement value, and The thermocouple surface heat flow calculates the surface heat flow of the object to be measured; the surface heat flow of the object to be measured is convoluted with the unit impulse response at the point to be measured to obtain the transient temperature at the point to be measured, and the point to be measured is the object to be measured any of the points. By designing a reasonable algorithm to solve the problem of the inherent error introduced by the thermocouple when measuring the transient temperature, the transient temperature measured by the thermocouple is calibrated, the introduced error of the thermocouple is reduced, and the temperature measurement accuracy is improved; It has strong universality because of the differences in measurement objects, different thermocouple structures and materials; when used to measure the transient temperature on the surface of the engine piston, it can provide reliable basic data for the research on the combustion and heat transfer temperature in the engine cylinder.
Description
technical field [0001] The invention belongs to the field of engine testing, and more specifically relates to a transient temperature measurement and calibration method and system. Background technique [0002] The temperature data of the piston surface is an indispensable basic data for studying combustion and heat transfer in the cylinder of an internal combustion engine, but due to its highly transient characteristics, its measurement is extremely difficult. The response speed of the temperature measurement sensor must be fast enough to capture the temperature change on the piston surface, and the traditional temperature measurement sensor is difficult to meet this measurement requirement. [0003] Currently commonly used temperature sensors are coaxial surface junction thermocouples and coaxial thin film thermocouples. Coaxial thermocouple temperature measurement is a contact temperature measurement. Installing a coaxial thermocouple at the point to be measured on the p...
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IPC IPC(8): G01K15/00
CPCG01K15/005
Inventor 杨灿成晓北李国梁孟桓如邓天伦
Owner HUAZHONG UNIV OF SCI & TECH