Nonlinear lubricating oil temperature signal acquiring and processing method
A technology of temperature signal and processing method, applied in the field of avionics, can solve the problem of difficulty in measuring temperature parameters of non-linear lubricating oil, and achieve the effect of being beneficial to maintenance and maintenance
Active Publication Date: 2019-03-29
SHAANXI QIANSHAN AVIONICS
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[0003] The purpose of the present invention is to provide a method for collecting and processing nonlinear lubricating oil temperature signals, using a standard voltage measurement interface circuit to test theoretical values and software algorithms through experiments to solve the current technical problem of difficult measurement of nonlinear lubricating oil temperature parameters
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[0019] Below in conjunction with accompanying drawing and embodiment the present invention will be further described: concrete method is as follows:
[0020] Step 1: In the temperature test chamber, immerse the lubricating oil temperature sensor on the machine into the lubricating oil, set different temperatures T1 and different power supply voltages V1, use a voltmeter to measure the output voltage V2 of the sensor, and the test data are shown in Table 1:
[0021] Table 1 Test data table
[0022]
[0023]
[0024] Explanation: The first line on the left side of the table is the temperature value T1 set by the temperature test chamber in turn, the first line above the table is to change the sensor supply voltage V1 at a fixed temperature T1, and the middle of the table is the sensor output measured by a voltmeter at the corresponding temperature and input voltage The value of the voltage V2. Among them, the typical value range of the lubricating oil temperature T1 is se...
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The invention belongs to aviation electronic technology, and relates to a nonlinear lubricating oil temperature signal acquiring and processing method. The method comprises the steps of in a laboratory condition, testing output of a lubricating oil temperature sensor by means of an on-plane lubricating oil temperature sensor at different temperatures in different power supply voltage conditions, acquiring typical values of the lubricating oil temperature T1 and theoretical testing data of sensor power supply voltage V1 and sensor output voltage v2; secondly, analyzing the correspondence amongthe lubricating oil temperature T1, the sensor power supply voltage V1 and the sensor output voltage V2; performing simulation for obtaining a linear model of the lubricating oil temperature T1, the sensor power supply voltage V1 and the sensor output voltage V2; and finally realizing nonlinear lubricating oil temperature signal acquisition and processing in a condition of being restricted by one-plane equipment hardware and computing result according to the linear model.
Description
technical field [0001] The invention belongs to the avionics technology, and in particular relates to a method for collecting and processing nonlinear lubricating oil temperature signals. Background technique [0002] Aircraft lubricating oil temperature signal is an important signal collected by flight parameter collector. Aircraft maintenance personnel can use this signal to know the temperature of the aircraft engine lubricating oil and understand the operating status of the engine. Generally, the lubricating oil temperature sensor is a temperature-measuring circuit with temperature-sensitive resistance components as the core. There are mainly two modes: constant voltage power supply and current measurement mode and constant current power supply and voltage measurement mode. The author encountered a temperature measurement circuit with a DC voltage supply voltage measurement mode on a certain type of aircraft. Because the sensor power supply voltage is different accordin...
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Login to View More IPC IPC(8): G01K7/16
CPCG01K7/16
Inventor 鲁爱森山磊李艳
Owner SHAANXI QIANSHAN AVIONICS