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System calibrating method for improving measurement accuracy

A technology for system calibration and measurement accuracy, which is applied in the direction of railway vehicle shape measuring devices, railway car body parts, railway auxiliary equipment, etc., can solve the problems of large temperature measurement errors in detection systems, manual adjustments, undisclosed calculation methods, etc., to achieve guaranteed The effect of system temperature measurement accuracy

Inactive Publication Date: 2008-07-30
BEIJING CTROWELL INFRARED TECHN
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Problems solved by technology

Therefore, after the probe is newly installed or replaced, it is necessary to manually adjust the response curve of each probe, or store the response curve of the newly installed or newly replaced probe measured in the laboratory into the calculation program. This process requires manual input of each probe. The response curve or replacement procedure of the probe, and if the response curve of the probe does not match the newly installed or replaced probe, it will cause a large temperature measurement error in the detection system
[0005] Literature: A new type of infrared thermal axis detection system, Journal of Railway Science, 2005, 27(4), 114-118, pointed out that the black body is used for system calibration to make up for the inconsistency of the probe, but the specific calculation method is not disclosed

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  • System calibrating method for improving measurement accuracy
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  • System calibrating method for improving measurement accuracy

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] A system calibration method to improve the measurement accuracy. After installing or replacing the probe, this method does not need to manually input the response curve or replacement program of each probe, and uses a black body to perform a calibration. After calculation by the computer system, the probe can be obtained. The corresponding probe response curve eliminates the influence of probe performance inconsistency and system error on temperature measurement accuracy. When the probe performance or system error changes greatly, use the black body to calibrate once, and after calculation by the computer system, the probe response curve corresponding to the current performance of the probe and the system can be obtained, which ensures the temperature measurement accuracy of the system.

[0026] As shown in Figure 1, the modulation probe 1 is connected...

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Abstract

The invention discloses a system calibration method for improving the measurement precision, which avoids the effect on temperature measurement precision due to different probe performance. After the probe is installed or replaced, a probe respond curve corresponding to the probe can be obtained by carrying out calibration once with blackbody and calculating by a computer system without inputting a respond curve of each probe or replacing any program manually, so as to avoid the effect on the temperature measurement precision due to different probe performance. When the change of probe performance is big, calibration is carried out once with the blackbody and the probe respond curve corresponding to the current performance of the probe can be obtained through the calculation of the computer system, thus guaranteeing the precision of temperature measurement of the system.

Description

technical field [0001] The invention belongs to the field of railway infrared equipment, and relates to a system calibration method, in particular to a system calibration method for improving measurement accuracy. Background technique [0002] In the currently applied train axle temperature detection system, the probe is usually calibrated and the response curve of the probe is manually adjusted according to the calibration error. [0003] Even if the probe response curve is correct, if there is an error in the signal processing circuit and data acquisition part of the train axle temperature detection system, it will cause a large error in the temperature measurement of the system. In the currently used train axle temperature detection system, the gain of the signal processing circuit and the data acquisition circuit is usually adjusted by adjusting the feedback resistance (adjusting the potentiometer) to avoid the influence of this part of the error. All adjusted circuits ...

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Application Information

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IPC IPC(8): B61K9/04B61K9/06
Inventor 孙庆农时猛南振会王新华周立玮曲歌朱波
Owner BEIJING CTROWELL INFRARED TECHN
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