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Aviation multi-media flow calibration method and its calibration system

A calibration method and multi-media technology, applied in the direction of volume/mass flow generated by mechanical effects, and by detecting the dynamic effects of fluid flow, etc., to achieve the effect of improving accuracy and efficiency

Active Publication Date: 2020-08-28
XIAN AERO ENGINE CONTROLS
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of the existing test method that requires a good test environment and can only perform flow calibration at a specific temperature, the present invention provides an on-site full-temperature aviation multi-media flow calibration system with higher accuracy and its calibration method

Method used

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  • Aviation multi-media flow calibration method and its calibration system
  • Aviation multi-media flow calibration method and its calibration system
  • Aviation multi-media flow calibration method and its calibration system

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Embodiment Construction

[0027] see figure 1 , The device of the present invention includes a temperature sensor, a flow sensor, a temperature measuring circuit, a frequency measuring circuit and a central processing unit, the temperature sensor is connected to the central processing unit through the temperature measuring circuit, and the flow sensor is connected to the central processing unit through the frequency measuring circuit.

[0028] The front stage of the frequency measurement circuit can also use an analog filter circuit with strong anti-interference, which can greatly improve the electromagnetic compatibility and anti-interference performance of the instrument. This circuit can effectively filter out power frequency and radio frequency interference, and can effectively protect the next-level frequency measurement circuit, which greatly improves the stability of the instrument in the field.

[0029] The frequency measurement process is divided into two parts: rough measurement and precision...

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Abstract

The invention relates to an aviation multi-medium flow calibration method, which mainly includes the following steps: adjusting the temperature of the medium at fixed intervals, repeating the measurement, and obtaining the corresponding curve family of the frequency of the flow sensor and the flow at multiple temperature points; through the mathematical formula The way of fitting the test points is to fit multiple sets of data curves into a spatial surface with X as the temperature, Y as the frequency value of the flow sensor, and Z as the actual flow rate; the surface is normalized and summarized as a temperature And the sensor frequency as input, the flow value is the output; in the actual measurement, by measuring the medium temperature and the flow sensor frequency, the obtained formula is calculated to obtain the flow value to be measured. The invention has strong anti-interference performance, can directly carry out flow calibration work on site, and has higher calibration efficiency.

Description

technical field [0001] The invention belongs to a flow measurement system, in particular to a system and a calibration method for calibrating the flow of various aviation oil media at different media temperatures by using an impeller sensor. Background technique [0002] The existing aviation multi-media flow calibration system uses a fixed pulse number to measure the frequency. During the calibration process, it needs to adjust the temperature of the measured medium to a temperature point near the known parameters before performing calibration. At the same time, the calibration results are not Perform temperature influence correction. Therefore, the existing aviation multi-media flow calibration system has the disadvantage of requiring a good test environment and can only perform flow calibration at a specific temperature. Contents of the invention [0003] In order to solve the shortcomings of the existing test method that requires a good test environment and can only p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/28
CPCG01F1/28
Inventor 项阳李琳周宇涛
Owner XIAN AERO ENGINE CONTROLS
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