High temperature performance test system of elastic element with deformation compensation function

Abstract

The present application relates to the technical field of high-temperature performance test of elastic element, and particularly relates to a high-temperature performance test system of elastic element with deformation compensation function, wherein the deformation of the first calibration rod at different times and different temperatures is obtained according to the detection of the first detection assembly, and a deformation correction model of the second calibration rod is obtained; the deformation detected by the second detection assembly is, the deformation detected by the third detection assembly is, and the real deformation of the elastic element is. The present application can eliminate the measurement error caused by the structure deformation of the high-temperature performance test system of elastic element, avoid the influence of the thermal expansion and high-temperature creep deformation of the second calibration rod on the measurement accuracy, accurately calculate the pose change of the second fixing part, realize the dynamic error compensation of the data measured by the third detection part, and improve the measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of high-temperature performance testing technology for elastic elements, and in particular to a high-temperature performance testing system for elastic elements with deformation compensation function. Background Technology

[0002] Elastic elements are widely used in high-end fields such as aerospace, precision instruments, and automotive manufacturing. Their high-temperature performance is a key indicator determining the product's lifespan, reliability, and safety. High-precision measurement of the deformation curve of elastic elements is a core aspect of ensuring the quality of related products. However, in actual measurement processes, accurately measuring and evaluating the deformation curve of elastic elements has become a technical challenge.

[0003] Existing measuring devices will deform during long-term operation or in environments with large temperature variations. This deformation will be superimposed on the deformation of the elastic element being measured, thus affecting the accuracy of the measurement results. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a high-temperature performance testing system for elastic elements with deformation compensation function, so as to solve the problem that the existing high-temperature performance testing device for elastic elements will undergo slow deformation due to factors such as temperature changes and time, resulting in systematic errors mixed into the measurement results, thereby reducing the accuracy of high-temperature performance measurement of elastic elements.

[0005] This invention provides a high-temperature performance testing system for elastic elements with deformation compensation function, comprising: The heating element has a heating space inside; The calibration assembly includes a first calibration rod, a first detection component, and a first fixing member; the first calibration rod extends into the heating space, and both ends of the first calibration rod on the Z-axis extend out of the heating element; the first fixing member is disposed at one end of the first calibration rod on the Z-axis; the first detection component is disposed at the other end of the first calibration rod in the length direction; The testing assembly includes a second calibration rod, a second detection component, a third detection element, a second fixing element, and a load application device. An elastic element and the second calibration rod are respectively mounted on the second fixing element. The second fixing element, the elastic element, and a portion of the second calibration rod are disposed within the heating space. The second detection component is located at the end of the second calibration rod on the Z-axis away from the second fixing element. The load application device is located at the end of the elastic element on the Z-axis away from the second fixing element. The third detection element is located at the end of the load application device on the Z-axis away from the elastic element. Based on the deformation of the first calibration rod obtained by the first detection component at different times and temperatures, a temperature-time coupled deformation correction model for the second calibration rod is obtained. ,in The temperature inside the heating element. The cumulative insulation time; the deformation detected by the second detection component. The deformation detected by the third detection element The actual deformation of the elastic element .

[0006] Preferably, the first calibration rod is positioned at the midpoint of the heating space along the Y and X axes; the length of the second calibration rod along the Z axis is half the length of the first calibration rod along the Z axis, and the two ends of the first calibration rod extending out of the heating element by equal lengths along the Z axis; the second fixing member is positioned at the midpoint of the heating space along the Z axis, such that the axial elongation of the first calibration rod along the Z axis is twice the axial elongation of the second calibration rod along the Z axis, after removing deflection coupling interference. Dividing by 2 yields the temperature- and time-coupled deformation correction model for the second calibration rod. ; The first detection component includes a support member perpendicular to the Z-axis and a first sub-first detection member, a first sub-second detection member, and a first sub-third detection member mounted on the support member. The first sub-first detection member and the first sub-second detection member are arranged along the Y-axis. The first sub-third detection member is located on one side of the line connecting the first sub-first detection member and the first sub-second detection member, which is on the X-axis. The first sub-first detection member, the first sub-second detection member, and the first sub-third detection member form an equilateral triangle with a center. By introducing coordinates to construct an attitude mapping function to counteract the coupling offset caused by deflection, we obtain... ;in The displacement of the first calibration bar on the Z-axis, detected by the first detection component. The axial correction term introduced for the deflection of the first calibration bar about the X-axis; The axial correction term introduced for the deflection of the first calibration bar about the Y-axis. The angle formed by the rotation of the first calibration rod around the X-axis, detected by the first detection component. The angle formed by the rotation of the first calibration rod around the Y-axis, detected by the first detection component. The distance on the X-axis is the distance between the axis of the first calibration bar extending along the Z-axis and the center of the equilateral triangle. The distance on the Y-axis is the distance between the axis of the first calibration bar extending along the Z-axis and the center of the equilateral triangle.

[0007] Preferably, before the heating element heats the first calibration rod, the axis extending along the Z-axis of the first calibration rod can pass through the center of the equilateral triangle. =0, =0, ; And / or, the side length of the equilateral triangle is 50mm.

[0008] Preferably, the second detection component is the same as the first detection component, and both the first detection component and the second detection component include three laser displacement sensors.

[0009] Preferably, the optical axes of the three laser displacement sensors are arranged parallel to each other.

[0010] Preferably, the calibration component further includes: A first measurement panel is disposed at the end of the first calibration bar facing the first detection component; The testing components also include: The second measurement panel is located at the end of the second calibration bar that faces the second detection component; A third measuring panel is disposed at one end of the load applying device facing the third detection element, and the displacement of the third measuring panel is the same as that of the elastic element; The first measuring panel, the second measuring panel, and the third measuring panel are all formed as plate-shaped structures perpendicular to the Z-axis.

[0011] Preferably, the axis of the first calibration bar extending along the Z-axis passes through the center of the first measurement panel; And / or, the axis of the second calibration bar extending along the Z-axis passes through the center of the second measurement panel; And / or, the third detection element is disposed opposite to the center of the third measuring panel, and the axis of the load application device extending along the Z-axis and the axis of the elastic element extending along the Z-axis are collinear and can pass through the center of the third measuring panel.

[0012] Preferably, the height of the axis of the second calibration bar extending along the Z-axis on the Y-axis is the same as the height of the center of the elastic element on the Y-axis; And / or, the distance between the axis of the second calibration bar extending along the Z-axis and the center of the elastic element in the X-axis direction is 50 mm.

[0013] Preferably, the materials of the first calibration rod and the second calibration rod are silicon nitride; And / or, the first calibration bar and the second calibration bar are made of the same material; And / or, the diameter of the first calibration rod and the diameter of the second calibration rod are both 10 mm.

[0014] Preferably, the calibration assembly further includes a support member disposed outside the heating element, the support member having a support portion disposed below the first calibration rod to counteract the bending of the first calibration rod due to its own weight.

[0015] The high-temperature performance testing system for elastic elements with deformation compensation function of the present invention obtains a temperature-time coupled deformation correction model for a second calibration rod based on the deformation of a first calibration rod at different times and temperatures obtained by the first detection component. ,in The temperature inside the heating element. The cumulative insulation time; the deformation detected by the second detection component. The deformation detected by the third inspection piece The actual deformation of the elastic element By setting a second calibration bar that deforms synchronously with the second fixing component, the deformation of the elastic element high-temperature performance testing system itself is converted into measurable displacement data. Then, a compensation algorithm is used to separate the deformation of the elastic element from the deformation of the system itself, thereby eliminating the measurement error caused by the structural deformation of the elastic element high-temperature performance testing system itself. This avoids the second calibration bar from undergoing thermal expansion and high-temperature creep deformation, which would affect the measurement accuracy. Furthermore, it accurately calculates the positional change of the second fixing component, achieving dynamic error compensation for the data measured by the third detection component and improving the measurement accuracy.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the assembly of calibration components and heating elements in a high-temperature performance testing system for elastic elements with deformation compensation function provided in an embodiment of the present invention. Figure 2A schematic diagram of the assembly of the test components and heating elements in a high-temperature performance testing system for elastic elements with deformation compensation function provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of the first detection component in a high-temperature performance testing system for elastic elements with deformation compensation function provided in an embodiment of the present invention.

[0019] Icons: 10-Heating element; 11-Heating space; 21-First calibration rod; 22-Second calibration rod; 31-First detection assembly; 311-First sub-first detection element; 312-First sub-second detection element; 313-First sub-third detection element; 32-Second detection assembly; 33-Third detection element; 34-Supporting element; 41-First fixing element; 42-Second fixing element; 50-Load application device; 60-Elastic element; 71-First measuring panel; 72-Second measuring panel; 73-Third measuring panel; 80-Supporting element. Detailed Implementation

[0020] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0021] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0022] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0023] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0024] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0025] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0026] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0027] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0028] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0029] The present invention provides a high-temperature performance testing system for elastic elements with deformation compensation function, which includes a heating element 10, a calibration component and a testing component.

[0030] The specific structure of the above-mentioned components of the high-temperature performance testing system for elastic elements with deformation compensation function according to this embodiment will be described below.

[0031] In this embodiment, as Figure 1 and Figure 2 As shown, a heating space 11 is formed inside the heating element 10. The heating element 10 can be a tube furnace, such as a full-range temperature zone tube furnace. The area inside the heating element 10 forms a high-temperature zone, and the outside of the heating element 10 forms a room temperature zone relative to the high-temperature zone.

[0032] like Figure 1 As shown, the calibration assembly includes a first calibration rod 21, a first detection assembly 31, and a first fixing member 41; as Figure 2 As shown, the test assembly includes a second calibration rod 22, a second detection assembly 32, a third detection element 33, a second fixing element 42, and a load application device 50. The first calibration rod 21 and the second calibration rod 22 are both formed as rod-shaped or bar-shaped structures extending along the Z-axis. In this embodiment, the first calibration rod 21 and the second calibration rod 22 can adopt rod-shaped or bar-shaped structures with a circular outer contour. In other optional embodiments, the first calibration rod 21 and the second calibration rod 22 can adopt rod-shaped or bar-shaped structures with a polygonal outer contour, such as square rod-shaped or bar-shaped structures.

[0033] In this embodiment, as Figure 2 As shown, the elastic element 60 and the second calibration rod 22 are respectively mounted on the second fixing member 42, such that one end of the elastic element 60 and the second calibration rod 22 is fixed relative to the second fixing member 42, and the second fixing member 42 is fixed relative to the frame of the test system. The second fixing member 42, the elastic element 60, and part of the second calibration rod 22 are arranged in the heating space 11. The second detection component 32 is arranged at the end of the second calibration rod 22 away from the second fixing member 42 on the Z-axis. The load application device 50 is arranged at the end of the elastic element 60 away from the second fixing member 42 on the Z-axis. The load application device 50 is used to apply an axial load to the elastic element 60, that is, a load along the Z-axis, to drive the elastic element 60 to undergo controllable elastic deformation. The third detection component 33 is arranged at the end of the load application device 50 away from the elastic element 60 on the Z-axis. The third detection component 33 can be a laser displacement sensor, which can collect real-time displacement data to obtain the deformation curve of the elastic element 60.

[0034] It should be noted that in a traditional test system that does not use a second calibration rod 22 and a second detection component 32, but only uses a displacement sensor for displacement detection, the component that provides fixed support for the elastic element will also be subjected to loading force and high temperature, resulting in slight deformation. This deformation will cause the displacement sensor to detect additional displacement caused by the deformation of the non-elastic element. This makes it impossible for the displacement sensor to distinguish between the actual deformation displacement of the elastic element and the interference displacement caused by the deformation of the device itself, ultimately leading to insufficient measurement accuracy and systematic errors in the test data.

[0035] Therefore, the fundamental problem with traditional testing systems is that they all fail to achieve real-time, on-load, and synchronized system deformation compensation during the testing process. Especially when the device operates at high temperatures for extended periods, the inelastic deformation caused by the evolution of the material's microstructure cannot be completely eliminated through static calibration or material selection. In this embodiment, by installing a second calibration rod 22 on the second fixture 42 and using a second detection component 32 to detect the displacement of the second calibration rod 22, the three-dimensional spatial pose change of the second fixture 42 is accurately calculated. This enables dynamic error compensation for the measurement data of the third detection component 33, i.e., real-time monitoring and compensation for the deformation of the measurement system itself, avoiding the tediousness and error accumulation of periodic calibration.

[0036] It needs to be further explained that, such as Figure 2 As shown, the second calibration rod 22 in the test assembly partially extends beyond the heating element 10, meaning the second calibration rod 22 spans the high-temperature zone and the room-temperature zone. The axial temperature gradient will cause thermal expansion and high-temperature creep deformation. If the deformation compensation amount of the system is directly obtained using the second detection component 32, the deformation error of the calibration rod itself will be superimposed. Therefore, this invention further compensates for the thermal expansion and high-temperature creep deformation of the second calibration rod 22 in the test assembly by constructing an independently set calibration component. Specifically, as... Figure 1As shown, the first calibration rod 21 extends into the heating space 11, with both ends of the first calibration rod 21 extending beyond the heating element 10 along the Z-axis. A first fixing member 41 is disposed at one end of the first calibration rod 21 along the Z-axis and can be fixed to the frame of the testing system. A first detection component 31 is disposed at the other end of the first calibration rod 21 along its length. Both the first fixing member 41 and the first detection component 31 are disposed outside the heating element 10, ensuring that the first fixing member 41 is not affected by the temperature generated by the heating element 10 and also preventing the displacement sensor from being affected by high temperatures. Finally, the deformation of the first calibration rod 21 at different times and temperatures is obtained through the first detection component 31. In other words, in this embodiment, the parameters detected by the first detection component 31 all include the deformation generated by the first calibration rod 21 itself; the parameters detected by the second detection component 32 include the combined deformation generated by the second calibration rod 22, the second fixing member 42, and the frame that fixes the second fixing member 42; and the parameters detected by the third detection component 33 include the combined deformation generated by the elastic element 60, the second fixing member 42, and the frame that fixes the second fixing member 42.

[0037] Therefore, in this embodiment, based on the deformation of the first calibration rod 21 at different times and temperatures obtained by the first detection component 31, a temperature-time coupled deformation correction model for the second calibration rod 22 is obtained. ,in The temperature inside the heating element 10, The cumulative insulation time; the deformation detected by the second detection component 32. The deformation detected by the third testing component 33 The actual deformation of the elastic element 60 By setting a second calibration rod 22 on the second fixing member 42 and deforming synchronously with it, the deformation of the high-temperature performance testing system of the elastic element 60 itself is converted into measurable displacement data. Then, by using a compensation algorithm to separate the deformation of the elastic element 60 from the deformation of the system itself, the measurement error caused by the structural deformation of the high-temperature performance testing system of the elastic element 60 is eliminated. This avoids the second calibration rod 22 from undergoing thermal expansion and high-temperature creep deformation, which would affect the measurement accuracy. Furthermore, the positional change of the second fixing member 42 is accurately calculated, achieving dynamic error compensation for the data measured by the third detection member 33 and improving the measurement accuracy.

[0038] It should be noted that, in one optional embodiment, two heating elements 10 are provided, one assembled with the calibration component and the other assembled with the test component, so that heating and holding can be performed simultaneously, thereby realizing real-time monitoring and accurate compensation of the deformation of the measurement system itself; in another optional embodiment, only one heating element 10 is provided, and the calibration component can be assembled with the heating element 10 first, and the heating and holding of the heating element 10 can be controlled according to the high-temperature performance test requirements of the elastic element 60 to obtain the deformation curve of the first calibration rod 21, and then the temperature and time coupled deformation correction model of the second calibration rod 22 can be obtained according to the dimensional relationship between the first calibration rod 21 and the second calibration rod 22. Then, the calibration components are removed from the heating element 10 and the test components are reassembled with the heating element 10, thus summarizing the results across the entire temperature range and multiple insulation durations. The data forms a calibration database; during formal testing, it is used to build a real-time database. , Linear interpolation is used to obtain the deformation correction amount of the calibration rod itself.

[0039] In a preferred embodiment, the calibration component further includes a first measurement panel 71, which is disposed at the end of the first calibration rod 21 facing the first detection component 31. The first measurement panel 71 is fixedly connected to the first calibration rod 21 or integrally formed with the first calibration rod 21. The displacement of the first measurement panel 71 is the same as the displacement of the first calibration rod 21. The dimension of the first measurement panel 71 on the X-axis or Y-axis is larger than the dimension of the first calibration rod 21 on the X-axis or Y-axis. This facilitates the installation and layout of the first detection component 31, improves the installation accuracy of the first measurement component, and to a certain extent improves the measurement accuracy of the first detection component 31. The testing component further includes a second measurement panel 72 and a third measurement panel 73. The second measurement panel 72... The second measuring panel 72 is fixedly connected to the second calibration rod 22 or integrally formed with the second calibration rod 22. The displacement of the second measuring surface is the same as the displacement of the second calibration rod 22. The size of the second measuring panel 72 on the X-axis or Y-axis is larger than the size of the second calibration rod 22 on the X-axis or Y-axis. This facilitates the installation and layout of the second detection component 32, improves the installation accuracy of the second measuring component, and to a certain extent improves the measurement accuracy of the second detection component 32. The third measuring panel 73 is located at the end of the load application device 50 facing the third detection element 33. The displacement of the third measuring panel 73 is the same as that of the elastic element 60, so as to improve the measurement accuracy of the third detection element 33.

[0040] In this embodiment, as Figure 1 and Figure 2As shown, the first measuring panel 71, the second measuring panel 72, and the third measuring panel 73 are all formed as plate-like structures perpendicular to the Z-axis. Preferably, the first measuring panel 71, the second measuring panel 72, and the third measuring panel 73 are metal plates with a flatness of ≤0.05mm. Preferably, the first measuring panel 71, the second measuring panel 72, and the third measuring panel 73 are square plates with a side length of 100mm.

[0041] Furthermore, in a preferred embodiment, such as Figure 1 and Figure 2 As shown, the axis of the first calibration rod 21 extending along the Z-axis passes through the center of the first measuring panel 71, so that the center of the first measuring panel 71 is the axis position of the first calibration rod 21, thus eliminating the need to compensate for the positional offset between the first calibration rod 21 and the first measuring panel 71; in a preferred embodiment, the axis of the second calibration rod 22 extending along the Z-axis passes through the center of the second measuring panel 72, so that the center of the second measuring panel 72 is the axis position of the second calibration rod 22, thus eliminating the need to compensate for the positional offset between the second calibration rod 22 and the second measuring panel 72; in a preferred embodiment, the third detection element 33 is disposed opposite to the center of the third measuring panel 73, and the axis of the load application device 50 extending along the Z-axis and the axis of the elastic element 60 extending along the Z-axis are collinear and can pass through the center of the third measuring panel 73, so that the center of the third measuring panel 73 is the axis position of the elastic element 60, thus eliminating the need to compensate for the positional offset between the elastic element 60 and the third measuring panel 73.

[0042] In this embodiment, as Figure 1 and Figure 3 As shown, the first detection component 31 includes a first support member 34 arranged perpendicular to the Z-axis and a first sub-first detection member 311, a first sub-second detection member 312 and a first sub-third detection member 313 mounted on the first support member 34. Optionally, the first sub-first detection member 311, the first sub-second detection member 312 and the first sub-third detection member 313 are all laser displacement sensors.

[0043] The first support member 34 is formed as a plate-like structure perpendicular to the Z-axis and fixed to the frame of the testing system, so that the first support member 34 remains stationary without displacement or deflection during the test. The first support member 34 and the first fixing member 41 are set independently of each other. Figure 3As shown, the first sub-first detection element 311 and the first sub-second detection element 312 are arranged along the Y-axis, and the first sub-third detection element 313 is located on one side of the line connecting the first sub-first detection element 311 and the first sub-second detection element 312, which is on the X-axis. That is, the midpoint of the line connecting the first sub-first detection element 311 and the first sub-second detection element 312 and the first sub-third detection element 313 are arranged at intervals along the X-axis. The first sub-first detection element 311, the first sub-second detection element 312 and the first sub-third detection element 313 form an equilateral triangle with a center. That is, the distance between the first sub-first detection element 311 and the first sub-second detection element 312, the distance between the first sub-second detection element 312 and the first sub-third detection element 313 and the distance between the first sub-first detection element 311 and the first sub-third detection element 313 are equal. For example, when the side length of the equilateral triangle is D, and the center of the equilateral triangle is the origin, the coordinates of the first sub-detector 311 are (0, -D / 2, 0), the coordinates of the first sub-detector 312 are (0, D / 2, 0), and the coordinates of the first sub-detector 313 are (...). D / 2, 0, 0).

[0044] In a preferred embodiment, the side length of the equilateral triangle is 50mm. At this time, the coordinates of the first sub-first detection element 311 are (0, -25, 0), the coordinates of the first sub-second detection element 312 are (0, 25, 0), and the coordinates of the first sub-third detection element 313 are (43.3, 0, 0).

[0045] During the calibration process, the room temperature zero point of the first detection component 31 is first collected in a steady state, that is, after the temperature field is uniform and stable. Then, the initial reference readings d of the first sub-first detection element 311, the first sub-second detection element 312, and the first sub-third detection element 313 are collected. 10 d 20 d 30 Secondly, the temperature is increased in stages at a low speed, and each target temperature point is held until the temperature and displacement signals are completely steady. Simultaneously, the original displacements d1, d2, and d3 of the first sub-detector 311, the first sub-detector 312, and the first sub-detector 313, as well as the temperature inside the heating element 10, are collected in real time. Cumulative heat preservation time Then, data preprocessing is performed, specifically subtracting the room temperature zero point to obtain the pure displacement change. At this point, based on the equilateral triangle arrangement of the first sub-first detection element 311, the first sub-second detection element 312, and the first sub-third detection element 313, the displacement of the first calibration rod 21 on the Z-axis can be obtained. The angle formed by the rotation of the first calibration rod 21 around the X-axis and the angle formed by the rotation of the first calibration rod 21 around the Y-axis ; among which based on and Only a tiny deflection, based on a small angle approximation In the test system of this invention, the deflection is much less than 1 rad, which meets the applicable conditions. A coordinate system is introduced to construct an attitude mapping function to counteract the coupling offset caused by the deflection, resulting in the following formula: ;in The displacement of the first calibration rod 21 on the Z-axis is detected by the first detection component 31. The angle formed by the rotation of the first calibration rod 21 around the X-axis, as detected by the first detection component 31. The angle formed by the rotation of the first calibration rod 21 around the Y-axis, as detected by the first detection component 31. The distance on the X-axis between the axis of the first calibration bar 21 extending along the Z-axis and the center of the equilateral triangle is given by the following value: Let be the distance on the Y-axis between the axis of the first calibration rod 21 extending along the Z-axis and the center of the equilateral triangle, where target point A is the perpendicular intersection of the axis of the first calibration rod 21 and the first measuring panel 71, which is the reference position for accurately determining the axial elongation of the first calibration rod 21 in this system. and The coordinates of target point A in the XOY plane are two-dimensional coordinates, which are fixed constants formed after assembly and can be calibrated and entered in advance by a coordinate measuring machine or high-precision calipers.

[0046] It should be noted that in the formula This refers to the axial elongation of the first calibration rod 21 after removing deflection coupling interference; specifically, it is the pure axial elongation of the first calibration rod 21 after removing the deflection coupling interference from the first fixing member 41, the frame and other supporting structures, and the first measuring panel 71. The axial correction term introduced for the deflection of the first calibration bar 21 about the X-axis; The axial correction term introduced for the deflection of the first calibration bar 21 around the Y-axis.

[0047] In a preferred embodiment, before the heating element 10 heats the first calibration rod 21, the axis extending along the Z-axis of the first calibration rod 21 can pass through the center of an equilateral triangle, that is, the center of the equilateral triangle formed by the first sub-first detection element 311, the first sub-second detection element 312, and the first sub-third detection element 313 is collinear with the axis of the first calibration rod 21. Therefore, in the above formula... =0 and =0, the formula can be simplified to This achieves zero deflection coupling error.

[0048] In this embodiment, as Figure 1 and Figure 2As shown, the first calibration rod 21 is positioned at the midpoint of the heating space 11 along the Y and X axes, achieving an approximately symmetrical temperature field distribution around the center axis of the heating element 10. The two ends of the first calibration rod 21 extend out of the heating element 10 at equal lengths along the Z-axis. One end is fixed to the first fixing member 41, and the other end is positioned opposite to the first detection component 31 along the Z-axis. The second fixing member 42 is positioned at the midpoint of the heating space 11 along the Z-axis. The length of the second calibration rod 22 along the Z-axis is half the length of the first calibration rod 21, i.e., 2 × the length of the second calibration rod 22 = the length of the first calibration rod 21. The thermal deformation and creep deformation under homogeneous small deformation are linearly proportional to the length of the strip-shaped rod and the rod-shaped rod, making the axial elongation of the first calibration rod 21 along the Z-axis twice the axial elongation of the second calibration rod 22 along the Z-axis. Therefore, the axial elongation of the first calibration rod 21 after removing deflection coupling interference is... Dividing by 2 yields the temperature- and time-coupled deformation correction model for the second calibration rod 22. Specifically, the temperature field within the heating element 10 is symmetrically distributed on both sides along the Z-axis. Dividing the corrected elongation of the first calibration rod 21 by 2 yields the deformation of the second calibration rod 22 itself. This achieves an equivalent conversion between the deformation of the first calibration rod 21 and the deformation of the second calibration rod 22, thereby enabling the temperature-time coupled deformation correction model of the second calibration rod 22 to be obtained based on the deformation of the first calibration rod 21 at different times and temperatures detected by the first detection component 31. .

[0049] Furthermore, in this embodiment, the second detection component 32 is the same as the first detection component 31. Both the first detection component 31 and the second detection component 32 include three laser displacement sensors. The arrangement of the three laser displacement sensors in the second detection component 32 is the same as that in the first detection component 31, that is, the three laser sensors in the second detection component 32 are also arranged in an equilateral triangle. This also enables the calculation of the spatial translation and two-dimensional rotation of the second fixing member 42, realizing the comprehensive measurement of multi-dimensional system deformation. The detection principle of the second detection component 32 is the same as that of the first detection component 31, and will not be described in detail here.

[0050] It should be noted that the structure supporting the second detection component 32 and the third detection component 33 is set independently of the second fixing component 42.

[0051] Furthermore, the optical axes of the three laser displacement sensors are arranged parallel to each other; specifically, the optical axes of all three laser displacement sensors are parallel to the Z-axis, that is, the optical axes of the three laser displacement sensors in the second detection assembly 32 are all perpendicular to the second measuring panel 72, and the optical axes of the three laser displacement sensors in the first detection assembly 31 are all perpendicular to the first measuring panel 71; in addition, the optical axis of the third detection element 33 is perpendicular to the third measuring panel 73. It should be noted that before the system officially begins testing, all sensor channels must be calibrated to zero position to eliminate initial installation errors.

[0052] In a preferred embodiment, such as Figure 2 As shown, the height of the axis of the second calibration rod 22 extending along the Z-axis on the Y-axis is the same as the height of the center of the elastic element 60 on the Y-axis, so that the installation position of the second calibration rod 22 on the second fixing member 42 and the installation position of the elastic element 60 on the second fixing member 42 are on the same horizontal line, thus improving the measurement accuracy to a certain extent.

[0053] Preferably, the distance between the axis of the second calibration bar 22 extending along the Z-axis and the center of the elastic element 60 in the X-axis direction is 50 mm, which also helps to improve the measurement accuracy of the test system.

[0054] In a preferred embodiment, the first calibration rod 21 and the second calibration rod 22 are made of silicon nitride to ensure that they possess sufficient high-temperature strength, strong resistance to creep relaxation, insensitivity to temperature changes in elastic modulus, high melting point, and moderate thermal conductivity. Therefore, silicon nitride ceramic is selected for the first calibration rod 21 and the second calibration rod 22 to reduce the impact of thermal expansion.

[0055] Preferably, the first calibration rod 21 and the second calibration rod 22 are made of the same material.

[0056] Since the first calibration rod 21 is formed into a long, rod-like structure, in a preferred embodiment, such as... Figure 1 As shown, the calibration assembly also includes a support member 80, which can be a bracket or similar structure. The support member 80 is disposed outside the heating element 10 and has a supporting portion located below the first calibration rod 21. This supports the first calibration rod 21, thus counteracting the bending caused by its own weight. This allows the support member 80 to vertically support the first calibration rod 21 without being affected by temperature. The support member 80 only counteracts the bending caused by the weight of the first calibration rod 21, without creating axial constraints, allowing its thermal expansion to be released freely. It should be noted that, in a preferred embodiment, the test assembly also includes a support member for supporting the second calibration rod 22 to counteract the bending caused by its own weight.

[0057] In this embodiment, both the first calibration rod 21 and the second calibration rod 22 can be regarded as having one end fixed by the first fixing member 41 or the second fixing member 42, and the other end vertically supported by the support member 80 so that it is free from bending moment constraint. According to the mechanical formulas such as maximum bending stress, when both the first calibration rod 21 and the second calibration rod 22 are made of silicon nitride material, the diameter of the first calibration rod 21 and the diameter of the second calibration rod 22 are both 10mm.

[0058] According to the high-temperature performance testing system for the elastic element 60 with deformation compensation function of the present invention, based on the deformation of the first calibration rod 21 obtained by the first detection component 31 at different times and temperatures, a temperature-time coupled deformation correction model for the second calibration rod 22 is obtained. ,in The temperature inside the heating element 10, The cumulative insulation time; the deformation detected by the second detection component 32. The deformation detected by the third testing component 33 The actual deformation of the elastic element 60 By setting a second calibration rod 22 on the second fixing member 42 and deforming synchronously with it, the deformation of the high-temperature performance testing system of the elastic element 60 itself is converted into measurable displacement data. Then, by using a compensation algorithm to separate the deformation of the elastic element 60 from the deformation of the system itself, the measurement error caused by the structural deformation of the high-temperature performance testing system of the elastic element 60 is eliminated. This avoids the second calibration rod 22 from undergoing thermal expansion and high-temperature creep deformation, which would affect the measurement accuracy. Furthermore, the positional change of the second fixing member 42 is accurately calculated, achieving dynamic error compensation for the data measured by the third detection member 33 and improving the measurement accuracy.

[0059] Specifically, the high-temperature performance testing system for elastic element 60 with deformation compensation function can monitor and compensate for the system's own deformation in real time, avoiding the tediousness and error accumulation of periodic calibration, achieving a significant improvement in measurement accuracy, and ensuring stable and reliable compensation accuracy. It also avoids the influence of the deformation of the second calibration rod 22 itself on the compensation results, ensuring the stability of the compensation accuracy. Furthermore, the high-temperature performance testing system for elastic element 60 with deformation compensation function does not rely on complex environments and control equipment, reducing equipment costs and the barrier to entry. It can also adapt to different temperature environments and measurement needs of different measurement cycles, making it more widely applicable. In addition, the high-temperature performance testing system for elastic element 60 with deformation compensation function is simple to operate and low in cost. It does not require large-scale modification of existing measuring devices and can be directly added to existing measuring devices, resulting in low modification costs and easy promotion and application.

[0060] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A high-temperature performance testing system for elastic elements with deformation compensation function, characterized in that, include: The heating element has a heating space inside; The calibration assembly includes a first calibration bar, a first detection assembly, and a first fixture; The first calibration rod extends into the heating space, and its two ends on the Z-axis extend out of the heating element; the first fixing member is disposed at one end of the first calibration rod on the Z-axis; the first detection component is disposed at the other end of the first calibration rod in the length direction. The testing assembly includes a second calibration rod, a second detection component, a third detection element, a second fixing element, and a load application device. An elastic element and the second calibration rod are respectively mounted on the second fixing element. The second fixing element, the elastic element, and a portion of the second calibration rod are disposed within the heating space. The second detection component is located at the end of the second calibration rod on the Z-axis away from the second fixing element. The load application device is located at the end of the elastic element on the Z-axis away from the second fixing element. The third detection element is located at the end of the load application device on the Z-axis away from the elastic element. Based on the deformation of the first calibration rod obtained by the first detection component at different times and temperatures, a temperature-time coupled deformation correction model for the second calibration rod is obtained. ,in The temperature inside the heating element. The cumulative insulation time; the deformation detected by the second detection component. The deformation detected by the third detection element The actual deformation of the elastic element .

2. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 1, characterized in that, The first calibration rod is positioned at the midpoint of the heating space along the Y and X axes; the second calibration rod's length along the Z axis is half the length of the first calibration rod along the Z axis, and the two ends of the first calibration rod extending equally beyond the heating element along the Z axis; the second fixing member is positioned at the midpoint of the heating space along the Z axis, such that the axial elongation of the first calibration rod along the Z axis is twice the axial elongation of the second calibration rod along the Z axis, after removing deflection coupling interference. Dividing by 2 yields the temperature- and time-coupled deformation correction model for the second calibration rod. ; The first detection component includes a support member perpendicular to the Z-axis and a first sub-first detection member, a first sub-second detection member, and a first sub-third detection member mounted on the support member. The first sub-first detection member and the first sub-second detection member are arranged along the Y-axis. The first sub-third detection member is located on one side of the line connecting the first sub-first detection member and the first sub-second detection member, which is on the X-axis. The first sub-first detection member, the first sub-second detection member, and the first sub-third detection member form an equilateral triangle with a center. By introducing coordinates to construct an attitude mapping function to counteract the coupling offset caused by deflection, we obtain... ;in The displacement of the first calibration bar on the Z-axis, detected by the first detection component. The axial correction term introduced for the deflection of the first calibration bar about the X-axis; The axial correction term introduced for the deflection of the first calibration bar about the Y-axis. The angle formed by the rotation of the first calibration rod around the X-axis, detected by the first detection component. The angle formed by the rotation of the first calibration rod around the Y-axis, detected by the first detection component. The distance on the X-axis is the distance between the axis of the first calibration bar extending along the Z-axis and the center of the equilateral triangle. The distance on the Y-axis is the distance between the axis of the first calibration bar extending along the Z-axis and the center of the equilateral triangle.

3. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 2, characterized in that, Before the heating element heats the first calibration rod, the axis of the first calibration rod extending along the Z-axis can pass through the center of the equilateral triangle. =0, =0, ; And / or, the side length of the equilateral triangle is 50mm.

4. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 2, characterized in that, The second detection component is the same as the first detection component, and both the first and second detection components include three laser displacement sensors.

5. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 4, characterized in that, The optical axes of the three laser displacement sensors are arranged parallel to each other.

6. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 1, characterized in that, The calibration component also includes: A first measurement panel is disposed at the end of the first calibration bar facing the first detection component; The testing components also include: The second measurement panel is located at the end of the second calibration bar that faces the second detection component; A third measuring panel is disposed at one end of the load applying device facing the third detection element, and the displacement of the third measuring panel is the same as that of the elastic element; The first measuring panel, the second measuring panel, and the third measuring panel are all formed as plate-shaped structures perpendicular to the Z-axis.

7. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 6, characterized in that, The axis of the first calibration bar extending along the Z-axis passes through the center of the first measurement panel; And / or, the axis of the second calibration bar extending along the Z-axis passes through the center of the second measurement panel; And / or, the third detection element is disposed opposite to the center of the third measuring panel, and the axis of the load application device extending along the Z-axis and the axis of the elastic element extending along the Z-axis are collinear and can pass through the center of the third measuring panel.

8. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 1, characterized in that, The height of the axis of the second calibration bar extending along the Z-axis on the Y-axis is the same as the height of the center of the elastic element on the Y-axis. And / or, the distance between the axis of the second calibration bar extending along the Z-axis and the center of the elastic element in the X-axis direction is 50 mm.

9. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 1, characterized in that, The first calibration rod and the second calibration rod are made of silicon nitride; And / or, the first calibration bar and the second calibration bar are made of the same material; And / or, the diameter of the first calibration rod and the diameter of the second calibration rod are both 10 mm.

10. The high-temperature performance testing system for elastic elements with deformation compensation function according to claim 1, characterized in that, The calibration assembly further includes a support member disposed outside the heating element. The support member has a support portion disposed below the first calibration rod to counteract the bending of the first calibration rod due to its own weight.

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