High-temperature vibration test temperature measuring method

Abstract

The invention belongs to the technical field of temperature measurement, and particularly relates to a high-temperature vibration test temperature measurement method. The method comprises the following steps: in a test preparation stage, arranging a temperature sensor on the upper surface of a test piece; a heat flux sensor is arranged between the test piece and the quartz lamp tube heater and close to the test piece; performing radiation heating on the test piece through a quartz lamp tube heater, applying a vibration load to the test piece through a vibration table, and respectively collecting the surface temperature of the test piece measured by a temperature sensor and the space temperature measured by a heat flux density sensor; constructing a temperature calculation model according to the surface temperature and the space temperature of the test piece; in the test stage, the temperature sensor is removed; performing radiation heating on the test piece through a quartz lamp tube heater, applying a vibration load to the test piece through a vibration table, and collecting a space temperature measured by a heat flux density sensor; and inputting the space temperature into the temperature calculation model, and outputting the surface temperature of the test piece.

Description

Technical Field

[0001] The present application belongs to the technical field of temperature measurement, and in particular relates to a temperature measurement method for a high-temperature vibration test. Background Art

[0002] The problem of temperature sensor fixation must be faced during high temperature vibration tests of military aircraft.

[0003] A typical high-temperature vibration test system consists of four parts: a quartz lamp heater, a test piece, a temperature sensor, and a vibration table. The quartz lamp heater is located above the test piece and heats the surface of the test piece by radiation. A temperature sensor is arranged on the surface of the test piece to measure the temperature of the test piece. The test piece is placed on the vibration table. During the test, a vibration load with a specific frequency and acceleration is applied to the test piece through the vibration table. In high-frequency, high-acceleration, high-temperature vibration tests, whether the temperature sensor is fixed by spot welding or gluing, the temperature sensor will loosen and fall off in a short time (usually 30 minutes), resulting in measurement errors and uncontrolled temperature loading process.

[0004] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned defects of the prior art. Summary of the invention

[0005] The purpose of the present application is to provide a temperature measurement method for a high temperature vibration test to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] A high temperature vibration test temperature measurement method, comprising:

[0008] During the test preparation phase:

[0009] Arrange a temperature sensor on the upper surface of the test piece;

[0010] A heat flux density sensor is arranged between the test piece and the quartz lamp heater and close to the test piece;

[0011] The test piece is radiantly heated by a quartz lamp heater, a vibration load is applied to the test piece by a vibration table, and the surface temperature of the test piece measured by the temperature sensor and the space temperature measured by the heat flux density sensor are respectively collected;

[0012] Constructing a temperature calculation model according to the surface temperature of the test piece and the space temperature, wherein the input of the temperature calculation model is the space temperature and the output is the surface temperature of the test piece;

[0013] During the trial phase:

[0014] Remove the temperature sensor;

[0015] Radiant heating is performed on the test piece by a quartz lamp heater, a vibration load is applied to the test piece by a vibration table, and the space temperature measured by the heat flux density sensor is collected;

[0016] The space temperature is input into the temperature calculation model, and the surface temperature of the test piece is output.

[0017] In at least one embodiment of the present application, during the test preparation stage, the duration of applying the vibration load to the test piece by the vibration table is 10-30 minutes.

[0018] In at least one embodiment of the present application, the temperature calculation model is:

[0019] wTest piece = f(Rspace

[0020] Among them, w 试验件 is the calculated value of the test piece surface temperature, R 空间 is the measured value of the heat flux density sensor.

[0021] In at least one embodiment of the present application, the temperature calculation model is a model constructed using a Kalman filter.

[0022] In at least one embodiment of the present application, the temperature calculation model is a model constructed using a convolutional neural network.

[0023] In at least one embodiment of the present application, the temperature calculation model is corrected or trained so that the error between the calculated value of the surface temperature of the test piece and the measured value of the temperature sensor meets the accuracy requirement.

[0024] The invention has at least the following beneficial technical effects:

[0025] The high temperature vibration test temperature measurement method of the present application adopts a heat flux density sensor to measure the space temperature, and then converts it into the surface temperature of the test piece, which effectively solves the problem that the sensor is easy to loosen and fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a temperature measurement method in the test preparation stage of an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of a temperature measurement method during the test phase of an implementation of the present application.

[0028] in:

[0029] 1-quartz lamp heater; 2-test piece; 3-vibration table; 4-temperature sensor; 5-heat flux density sensor. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of this application are described in detail below in conjunction with the drawings.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0032] The following is combined with Figure 1 to Figure 2 This application is described in further detail.

[0033] The present application provides a high temperature vibration test temperature measurement method, including the following process:

[0034] During the test preparation phase:

[0035] Arrange a temperature sensor on the upper surface of the test piece;

[0036] A heat flux density sensor is arranged between the test piece and the quartz lamp heater and close to the test piece;

[0037] The test piece is radiantly heated by a quartz lamp heater, and a vibration load is applied to the test piece by a vibration table, and the surface temperature of the test piece measured by a temperature sensor and the space temperature measured by a heat flux density sensor are respectively collected;

[0038] A temperature calculation model is constructed according to the surface temperature of the test piece and the space temperature, wherein the input of the temperature calculation model is the space temperature and the output is the surface temperature of the test piece;

[0039] During the trial phase:

[0040] Remove the temperature sensor;

[0041] The test piece is radiantly heated by a quartz lamp heater, a vibration load is applied to the test piece by a vibration table, and the space temperature measured by a heat flux density sensor is collected;

[0042] The space temperature is input into the temperature calculation model and the surface temperature of the test piece is output.

[0043] The high-temperature vibration test temperature measurement method of the present application collects temperature through temperature sensors and heat flux density sensors in the test preparation stage, and constructs a temperature calculation model for the calculation relationship between the surface temperature of the test piece and the spatial temperature based on the collected temperature data; in the test stage, the surface temperature of the test piece is inferred by inputting the spatial temperature into the temperature calculation model.

[0044] Specifically, the high temperature vibration test system includes a quartz lamp heater 1 and a test piece 2 arranged below the quartz lamp heater 1, and the test piece 2 is installed on a vibration table 3. Figure 1 As shown, in a preferred embodiment of the present application, during the test preparation stage, a temperature sensor 4 is arranged on the upper surface of the test piece, and a heat flux density sensor 5 is arranged between the test piece 2 and the quartz lamp heater 1 and close to the test piece 2. Since the heat flux density sensor 5 is located close to the test piece 2, the measurement value of the heat flux density sensor 5 is highly correlated with the surface temperature of the test piece. After the sensors are arranged, the test piece 2 is radiantly heated by the quartz lamp heater 1, and a vibration load is applied to the test piece 2 by the vibration table 3, and the measurement values ​​of the two sensors are collected and recorded. In this embodiment, the duration of applying the vibration load to the test piece by the vibration table is 10-30 minutes.

[0045] In this embodiment, the following temperature calculation model is established based on the temperature data:

[0046] 试验件 =f(R 空间

[0047] Among them, w 试验件 is the calculated value of the test piece surface temperature, R 空间 is the measured value of the heat flux density sensor.

[0048] Advantageously, in this embodiment, the temperature calculation model is a model constructed using a Kalman filter or a model constructed using a convolutional neural network. After the temperature calculation model is established, it must be corrected or trained so that the error between the calculated value of the surface temperature of the test piece and the measured value of the temperature sensor 4 meets the accuracy requirement.

[0049] In a preferred embodiment of the present application, Figure 2As shown, during the test phase, the temperature sensor 4 on the upper surface of the test piece is removed, the test piece 2 is radiantly heated by the quartz lamp heater 1, a vibration load is applied to the test piece 2 by the vibration table 3, the measurement value of the heat flux density sensor 5 is collected, and the surface temperature of the test piece is calculated in real time by the temperature calculation model. Since the heat flux density sensor 5 is suspended and has no physical connection with the test piece 2, the problem of the temperature sensor 4 vibrating and falling off during the test is fundamentally solved.

[0050] The temperature measurement method of the high temperature vibration test of the present application uses a suspended heat flux density sensor 5 to replace the temperature sensor 4 fixed on the test piece 2, and calculates the surface temperature value of the test piece through the measurement value of the heat flux density sensor 5, which fundamentally solves the problem of the temperature sensor 4 vibrating and falling off during the test. The present application is not only applicable to the heating test of military aircraft, but also to other similar occasions, so it also has broad application prospects in the civilian field.

[0051] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A high temperature vibration test temperature measurement method, characterized in that: include: During the test preparation phase: Arrange a temperature sensor on the upper surface of the test piece; A heat flux density sensor is arranged between the test piece and the quartz lamp heater and close to the test piece; The test piece is radiantly heated by a quartz lamp heater, a vibration load is applied to the test piece by a vibration table, and the surface temperature of the test piece measured by the temperature sensor and the space temperature measured by the heat flux density sensor are respectively collected; Constructing a temperature calculation model according to the surface temperature of the test piece and the space temperature, wherein the input of the temperature calculation model is the space temperature and the output is the surface temperature of the test piece; During the trial phase: Remove the temperature sensor; Radiant heating is performed on the test piece by a quartz lamp heater, a vibration load is applied to the test piece by a vibration table, and the space temperature measured by the heat flux density sensor is collected; The space temperature is input into the temperature calculation model, and the surface temperature of the test piece is output.

2. The high temperature vibration test temperature measurement method according to claim 1, characterized in that: During the test preparation stage, the vibration load is applied to the test piece through the vibration table for a duration of 10-30 minutes.

3. The high temperature vibration test temperature measurement method according to claim 2, characterized in that: The temperature calculation model is: w 试验件 =f(R 空间 ) Among them, w 试验件 is the calculated value of the test piece surface temperature, R 空间 is the measured value of the heat flux density sensor.

4. The high temperature vibration test temperature measurement method according to claim 3, characterized in that: The temperature calculation model is a model constructed using a Kalman filter.

5. The high temperature vibration test temperature measurement method according to claim 3, characterized in that: The temperature calculation model is a model constructed using a convolutional neural network.

6. The high temperature vibration test temperature measurement method according to claim 4 or 5, characterized in that: By correcting or training the temperature calculation model, the error between the calculated value of the surface temperature of the test piece and the measured value of the temperature sensor meets the accuracy requirement.

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