A control system for deformation rate in high-temperature compression tests

Abstract

This invention provides a control system for the deformation rate of a high-temperature compression test, comprising: a main drive shaft that drives a hammer to compress and deform a specimen; a hammer that cooperates with the main drive shaft and applies compressive force to the specimen; an acceleration time control unit that controls the acceleration process of the main drive shaft so that the main drive shaft reaches a preset speed within a preset time; a collision detection unit that detects the collision between the main drive shaft and the hammer and records the time and location of the collision; a rate calculation unit that calculates the rate of the main drive shaft after acceleration and the common rate of the main drive shaft and the hammer after collision; a displacement monitoring unit that monitors the displacement of the main drive shaft in real time and plots a displacement-time curve; a parameter adjustment unit that adjusts the acceleration time and acceleration distance of the main drive shaft; a distance and pressure adjustment unit that adjusts the initial distance between the main drive shaft and the hammer before the compression test and applies a preset pressure to the specimen; and a deformation control unit that controls the movement of the main drive shaft in stages during the compression test to ensure that the specimen maintains a constant deformation rate throughout the deformation process.

Description

Technical Field

[0001] This invention relates to the field of hot working technology for steel materials, and more particularly to a control system for the deformation rate of high-temperature compression tests. Background Technology

[0002] High-temperature compression testing is an important experimental method in materials science and engineering, used to study the mechanical properties and microstructure changes of metallic materials under high-temperature conditions. Through high-temperature compression testing, the influence of hot working parameters (such as deformation temperature, deformation rate, and deformation amount) on the microstructure and properties of metallic materials can be revealed. These findings are of great significance for optimizing hot working processes and improving product quality. In high-temperature compression testing, precise control of the deformation rate is one of the key factors ensuring the accuracy and reliability of the test results.

[0003] Currently, thermal simulation testing machines are widely used for high-temperature compression testing. These machines typically use a main drive shaft to drive a coaxial hammer to compress and deform the specimen. In existing technology, to control the deformation rate, a common method is to keep the main drive shaft a certain distance from the compression hammer, allowing the main drive shaft to accelerate before compressing and deforming the specimen. The purpose of this method is to ensure that the main drive shaft has sufficient speed when it contacts the hammer, thereby achieving the preset deformation rate in the initial stage of specimen deformation.

[0004] While existing technologies that increase the distance between the main drive shaft and the hammer can control the deformation rate to some extent, this method has significant drawbacks. First, there is no scientifically accurate calculation method for the appropriate distance, leading to imprecise control of the deformation rate. Second, if the main drive shaft and hammer come into contact before compressing the specimen, the initial deformation rate will be lower than the preset value, causing the deformation rate to gradually increase during the test, ultimately affecting the accuracy of the test results. Furthermore, existing technologies fail to adequately consider the interaction between the main drive shaft and the hammer (such as friction and impact), further limiting the precision of deformation rate control. Therefore, existing technologies suffer from inaccurate deformation rate control and significant deviations in test results during high-temperature compression tests, failing to meet the demands of high-performance product development for precise process parameter control. Summary of the Invention

[0005] To address the aforementioned technical problem, a control system for the deformation rate in a high-temperature compression test is provided. Before the test begins, the system separates the main drive shaft and the hammer to their maximum distance to ensure the main drive shaft is not disturbed by the hammer during acceleration. An acceleration control unit precisely controls the acceleration process of the main drive shaft and calculates its accelerated speed and the combined speed after collision with the hammer using the relationship between momentum and impulse. A collision detection unit detects the collision time and position between the main drive shaft and the hammer, and a displacement monitoring unit monitors the displacement of the main drive shaft in real time, plotting a displacement-time curve. Based on the displacement-time curve and the speed calculation results, the acceleration time and distance of the main drive shaft are adjusted to ensure that the main drive shaft reaches a preset speed upon collision with the hammer. The motion of the main drive shaft is divided into an acceleration stage and a compression deformation stage, with different speeds set for each stage to ensure the specimen maintains a constant deformation rate throughout the entire deformation process.

[0006] The technical means employed in this invention are as follows:

[0007] A control system for the deformation rate in a high-temperature compression test, comprising:

[0008] The main drive shaft is used to drive the hammer to compress and deform the sample.

[0009] The hammerhead, which works in conjunction with the main drive shaft, is used to apply compressive force to the sample.

[0010] The acceleration time control unit is used to control the acceleration process of the main drive shaft so that the main drive shaft reaches a preset speed within a preset time.

[0011] The collision detection unit is used to detect the collision between the main drive shaft and the hammer head, and record the time and location of the collision.

[0012] The rate calculation unit is used to calculate the rate of the main drive shaft after acceleration and the common rate of the main drive shaft after colliding with the hammer, based on the mass of the main drive shaft, the acceleration time, and the output of the collision detection unit.

[0013] The displacement monitoring unit is used to monitor the displacement of the main drive shaft in real time and plot the displacement-time curve.

[0014] The parameter adjustment unit is used to adjust the acceleration time and acceleration distance of the main drive shaft based on the displacement-time curve and the output of the rate calculation unit.

[0015] The distance and pressure adjustment unit is used to adjust the initial distance between the main drive shaft and the hammer head before the compression test and to apply a preset pressure to the sample.

[0016] The deformation control unit is used to control the movement of the main drive shaft in stages during the compression test to ensure that the specimen maintains a constant deformation rate throughout the deformation process.

[0017] Furthermore, the acceleration time control unit includes an acceleration drive module and a time control module, wherein:

[0018] The acceleration drive module is used to provide acceleration power to the main drive shaft;

[0019] The time control module is used to set the acceleration time of the main drive shaft and control the acceleration drive module to complete the acceleration process within a preset time.

[0020] Furthermore, the collision detection unit includes a force sensor, a time recording module, and a displacement recording module, wherein:

[0021] The force sensor is used to detect the collision force between the main drive shaft and the hammer head;

[0022] The time recording module is used to record the time point when the collision occurs;

[0023] The displacement recording module is used to record the displacement of the main drive shaft when a collision occurs.

[0024] Furthermore, the rate calculation unit calculates the rate of the main drive shaft after acceleration, using the following formula:

[0025]

[0026] in, This indicates the speed of the main drive shaft after acceleration. This represents the momentum gained by the main drive shaft after being accelerated by the system force during the acceleration time; This indicates the mass of the main drive shaft.

[0027] Furthermore, the rate calculation unit calculates the common rate after the main drive shaft collides with the hammer head, using the following formula:

[0028]

[0029] in, This indicates the common velocity after the main drive shaft collides with the hammer; Indicates the mass of the hammerhead; It represents the change of frictional force over time.

[0030] Furthermore, the displacement monitoring unit includes a displacement sensor module and a data processing module, wherein:

[0031] The displacement sensor module is used to monitor the displacement of the main drive shaft in real time;

[0032] The data processing module is used to plot a displacement-time curve based on the output of the displacement sensor module and analyze the slope of the curve to obtain the acceleration time and acceleration distance.

[0033] Furthermore, the data processing module analyzes the curve slope to determine the acceleration time and acceleration distance, specifically including:

[0034] Analyze the slope of the curve to obtain the speed of the main drive shaft after acceleration. and find out with The corresponding time is the acceleration time. ;

[0035] The slope of the curve corresponds to the speed after the main drive shaft accelerates. The two parameters, namely the displacement of the main drive shaft and the corresponding parameters, are found to be... The corresponding displacement is the acceleration distance. .

[0036] Furthermore, the parameter adjustment unit adjusts the operating speed of the main drive shaft based on the acceleration time and acceleration distance determined by the data processing module and the output of the speed calculation unit.

[0037] Furthermore, the distance and pressure adjustment unit includes a distance adjustment module, a pressure adjustment module, and a contact detection module, wherein:

[0038] The distance adjustment module is used to adjust the initial distance between the main drive shaft and the hammer head;

[0039] The pressure regulating module is used to adjust the pressure of the air hammer so that the sample is subjected to a preset pressure, the preset pressure range being 100-300 Newtons.

[0040] The contact detection module is used to detect whether there is contact between the main drive shaft and the hammer. When the two are in contact, the main drive shaft exerts a force on the hammer, which reduces the tensile force on the sample. When the reduction value is higher than 10 Newtons, the movement of the main drive shaft stops.

[0041] Furthermore, the deformation control unit includes an acceleration phase control module and a deformation phase control module, wherein:

[0042] The acceleration phase control module is used to control the main drive shaft to run at a preset speed during the 0-acceleration time.

[0043] The deformation stage control module is used to control the main drive shaft to run at the common speed after the collision during the entire deformation stage from the acceleration time to the end of the compression deformation.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] 1. The present invention provides a control system for the deformation rate of a high-temperature compression test. Before the compression test, the initial distance between the main drive shaft and the hammer head is adjusted to avoid the main drive shaft from contacting the hammer head prematurely during the acceleration process. This ensures that the main drive shaft can complete the acceleration process without interference, thereby reaching the preset rate when it contacts the hammer head, thus avoiding the problem that the deformation rate of the sample is lower than the preset value in the initial stage of deformation.

[0046] 2. The present invention provides a control system for the deformation rate of a high-temperature compression test. By precisely controlling the acceleration process of the main drive shaft through the acceleration control unit, the main drive shaft reaches the preset speed within a preset time, which can effectively reduce the deviation of test results caused by inaccurate acceleration time and improve the reliability and repeatability of the experiment.

[0047] 3. The present invention provides a control system for the deformation rate of a high-temperature compression test. The rate calculation unit calculates the rate of the main drive shaft based on the relationship between momentum and impulse. The rate can be accurately calculated without considering complex force conditions, which simplifies the control logic, reduces the complexity of the system, and improves the accuracy of rate calculation, thereby further enhancing the precision of the experiment.

[0048] 4. The present invention provides a control system for the deformation rate of a high-temperature compression test. The collision detection unit monitors the collision time and position of the main drive shaft and the hammer head in real time and accurately records the time and position of the collision. This allows the system to adjust the motion parameters of the main drive shaft in real time, ensuring that the main drive shaft and the hammer head can compress and deform the sample at the same speed after the collision, thus avoiding sudden changes in the rate caused by the collision.

[0049] 5. The present invention provides a control system for the deformation rate of a high-temperature compression test. By using a displacement monitoring unit to monitor the displacement of the main drive shaft in real time and plot the displacement-time curve, the acceleration time and acceleration distance of the main drive shaft can be dynamically adjusted to ensure that the speed of the main drive shaft when it contacts the hammer is consistent with the preset value, thereby further improving the accuracy and reliability of the experiment.

[0050] 6. The present invention provides a control system for the deformation rate of a high-temperature compression test. The system adjusts the motion parameters of the main drive shaft according to the displacement-time curve and the rate calculation results through a parameter adjustment unit, optimizes the acceleration process of the main drive shaft, and can optimize the control parameters in real time according to the actual working conditions to ensure the stability and accuracy of the experimental process.

[0051] 7. The present invention provides a control system for the deformation rate of a high-temperature compression test. This system divides the motion of the main drive shaft into an acceleration phase and a compression deformation phase through a staged deformation control unit, ensuring that the specimen maintains a constant deformation rate throughout the entire deformation process. This staged control strategy effectively avoids fluctuations in the deformation rate, improving the accuracy and reliability of the experimental results.

[0052] 8. The present invention provides a control system for the deformation rate of a high-temperature compression test. Through modular design, the complex control system is decomposed into multiple functional modules, achieving the technical effects of reducing system complexity, improving system stability, and enhancing maintainability. This modular design makes the functions of each part of the system clearly defined, facilitating maintenance and upgrades, while also improving the overall performance and reliability of the system.

[0053] Based on the above reasons, this invention can be widely applied in fields such as hot processing technology of steel materials. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the 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 based on these drawings without creative effort.

[0055] Figure 1 This is a block diagram of the system structure of the present invention.

[0056] Figure 2 This is a block diagram of the acceleration time control unit of the present invention.

[0057] Figure 3 This is a block diagram of the collision detection unit structure of the present invention.

[0058] Figure 4 This is a block diagram of the displacement monitoring unit of the present invention.

[0059] Figure 5 This is a block diagram of the distance and pressure adjustment unit of the present invention.

[0060] Figure 6 This is a structural block diagram of the deformation control unit of the present invention. Detailed Implementation

[0061] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0062] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0063] like Figure 1 As shown, the present invention provides a control system for the deformation rate in a high-temperature compression test, comprising:

[0064] The main drive shaft is used to drive the hammer to compress and deform the sample.

[0065] The hammerhead, which works in conjunction with the main drive shaft, is used to apply compressive force to the sample.

[0066] The acceleration time control unit is used to control the acceleration process of the main drive shaft so that the main drive shaft reaches a preset speed within a preset time.

[0067] The collision detection unit is used to detect the collision between the main drive shaft and the hammer head, and record the time and location of the collision.

[0068] The rate calculation unit is used to calculate the rate of the main drive shaft after acceleration and the common rate of the main drive shaft after colliding with the hammer, based on the mass of the main drive shaft, the acceleration time, and the output of the collision detection unit.

[0069] The displacement monitoring unit is used to monitor the displacement of the main drive shaft in real time and plot the displacement-time curve.

[0070] The parameter adjustment unit is used to adjust the acceleration time and acceleration distance of the main drive shaft based on the displacement-time curve and the output of the rate calculation unit.

[0071] The distance and pressure adjustment unit is used to adjust the initial distance between the main drive shaft and the hammer head before the compression test and to apply a preset pressure to the sample.

[0072] The deformation control unit is used to control the movement of the main drive shaft in stages during the compression test to ensure that the specimen maintains a constant deformation rate throughout the deformation process.

[0073] In specific implementation, as a preferred embodiment of the present invention, such as Figure 2 As shown, the acceleration time control unit includes an acceleration drive module and a time control module, wherein:

[0074] The acceleration drive module is used to provide acceleration power to the main drive shaft;

[0075] The time control module is used to set the acceleration time of the main drive shaft and control the acceleration drive module to complete the acceleration process within a preset time.

[0076] In specific implementation, as a preferred embodiment of the present invention, such as Figure 3 As shown, the collision detection unit includes a force sensor, a time recording module, and a displacement recording module, wherein:

[0077] The force sensor is used to detect the collision force between the main drive shaft and the hammer head;

[0078] The time recording module is used to record the time point when the collision occurs;

[0079] The displacement recording module is used to record the displacement of the main drive shaft when a collision occurs.

[0080] In a specific implementation, as a preferred embodiment of the present invention, the rate calculation unit calculates the rate of the main drive shaft after acceleration, and the calculation formula is as follows:

[0081]

[0082] in, This indicates the speed of the main drive shaft after acceleration. This represents the momentum gained by the main drive shaft after being accelerated by the system force during the acceleration time; This indicates the mass of the main drive shaft.

[0083] In a specific implementation, as a preferred embodiment of the present invention, the rate calculation unit calculates the common rate after the main drive shaft collides with the hammer head, and the calculation formula is as follows:

[0084]

[0085] in, This indicates the common velocity after the main drive shaft collides with the hammer; Indicates the mass of the hammerhead; It represents the change of frictional force over time.

[0086] In specific implementation, as a preferred embodiment of the present invention, such as Figure 4 As shown, the displacement monitoring unit includes a displacement sensor module and a data processing module, wherein:

[0087] The displacement sensor module is used to monitor the displacement of the main drive shaft in real time;

[0088] The data processing module is used to plot a displacement-time curve based on the output of the displacement sensor module and analyze the slope of the curve to obtain the acceleration time and acceleration distance.

[0089] In a specific implementation, as a preferred embodiment of the present invention, the data processing module analyzes the curve slope to determine the acceleration time and acceleration distance, specifically including:

[0090] Analyze the slope of the curve to obtain the speed of the main drive shaft after acceleration. and find out with The corresponding time is the acceleration time. ;

[0091] The slope of the curve corresponds to the speed after the main drive shaft accelerates. The two parameters, namely the displacement of the main drive shaft and the corresponding parameters, are found to be... The corresponding displacement is the acceleration distance. .

[0092] In a specific implementation, as a preferred embodiment of the present invention, the parameter adjustment unit adjusts the running speed of the main drive shaft according to the acceleration time and acceleration distance of the main drive shaft determined by the data processing module and according to the output of the speed calculation unit.

[0093] In specific implementation, as a preferred embodiment of the present invention, such as Figure 5 As shown, the distance and pressure adjustment unit includes a distance adjustment module, a pressure adjustment module, and a contact detection module, wherein:

[0094] The distance adjustment module is used to adjust the initial distance between the main drive shaft and the hammer head;

[0095] The pressure regulating module is used to adjust the pressure of the air hammer so that the sample is subjected to a preset pressure, the preset pressure range being 100-300 Newtons.

[0096] The contact detection module is used to detect whether there is contact between the main drive shaft and the hammer. When the two are in contact, the main drive shaft exerts a force on the hammer, which reduces the tensile force on the sample. When the reduction value is higher than 10 Newtons, the movement of the main drive shaft stops.

[0097] In specific implementation, as a preferred embodiment of the present invention, such as Figure 6 As shown, the deformation control unit includes an acceleration phase control module and a deformation phase control module, wherein:

[0098] The acceleration phase control module is used to control the main drive shaft to run at a preset speed during the 0-acceleration time.

[0099] The deformation stage control module is used to control the main drive shaft to run at the common speed after the collision during the entire deformation stage from the acceleration time to the end of the compression deformation.

[0100] Example 1

[0101] The sample was made of low-carbon steel and machined into a cylinder with a diameter of 8 mm and a height of 15 mm. The experimental procedure was as follows: heating to 1200℃ at a heating rate of 10℃ / s, holding at that temperature for 5 minutes, and then cooling to 1000℃. Deformation was then performed at this temperature, and the acceleration speed of the main drive shaft was measured. The deformation rate was 40 mm / s, and the tensile strength was 5 mm. The test was conducted using the following steps:

[0102] Step 1: Based on the structural characteristics of the thermal simulation testing machine, it can be seen that the testing machine compresses and deforms the sample by driving the main drive shaft to drive the coaxial hammer head. First, separate the main drive shaft and the hammer head to a distance of 15 mm.

[0103] Step 2: According to the experimental requirements, the speed of the main drive shaft after acceleration. =40 mm / s, the speed calculation unit calculates the common speed after the collision between the main drive shaft and the hammer head according to the calculation formula. =15 mm / s;

[0104] Step 3: With the main drive shaft and hammer head separated to their maximum distance, start the control system, set the main drive shaft's movement speed to 40 mm / s, and simultaneously collect displacement parameters and plot the displacement-time curve. The time required for the main drive shaft to reach a movement speed of 40 mm / s is recorded. =0.06 seconds, which is the acceleration time. By correlating the curve slope with the moving speed and displacement of the main drive shaft, the corresponding displacement can be found. =1.8 mm, which is the acceleration distance;

[0105] Step 4: First, separate the main drive shaft from the hammer head by 2 mm. Start the testing machine. The air hammer drives the hammer head to compress the simulated sample between the two anvils. Adjust the air hammer pressure so that the sample bears a pressure of 200 Newtons. Then, start the hydraulic system to slowly move the main drive shaft towards the hammer head. When the two come into contact, the main drive shaft exerts a force on the hammer head, increasing the sample pressure to 220 Newtons. At this point, the main drive shaft stops moving. Then, start the hydraulic system to retract the main drive shaft by 1.8 mm.

[0106] Step 5: Once the specimen reaches the predetermined deformation temperature, the hammer head is driven by the main drive shaft to compress and deform the specimen. The control of the main drive shaft movement is divided into two stages. The first stage is the acceleration stage, during which the running speed reaches 40 mm / s within 0-0.06 seconds. The second stage is the compression deformation stage, during which the running speed is 15 mm / s from 0.06 seconds until the end of the compression deformation.

[0107] Example 2

[0108] The sample was made of low-carbon steel and machined into a cylinder with a diameter of 8 mm and a height of 15 mm. The experimental procedure was as follows: heating to 1200℃ at a heating rate of 10℃ / s, holding at that temperature for 5 minutes, and then cooling to 950℃. Deformation was then performed at this temperature, and the acceleration speed of the main drive shaft was measured. The deformation rate was 400 mm / s, and the compression was 5 mm. The experiment was conducted through the following steps:

[0109] Step 1: Based on the structural characteristics of the thermal simulation testing machine, it can be seen that the testing machine compresses and deforms the sample by driving the main drive shaft to drive the coaxial hammer head. First, separate the main drive shaft and the hammer head to a distance of 15 mm.

[0110] Step 2: According to the experimental requirements, the speed of the main drive shaft after acceleration. =400 mm / s, the speed calculation unit calculates the common speed after the collision between the main drive shaft and the hammer head according to the calculation formula. =150 mm / s;

[0111] Step 3: With the main drive shaft and hammer head separated to their maximum distance, start the control system, set the main drive shaft's movement speed to 400 mm / s, and simultaneously collect displacement parameters and plot the displacement-time curve. Calculate the time required for the main drive shaft to reach a movement speed of 400 mm / s. =0.02 seconds, which is the acceleration time. By correlating the curve slope with the moving speed and displacement of the main drive shaft, the corresponding displacement can be found. =2.28 mm, which is the acceleration distance;

[0112] Step 4: First, separate the main drive shaft from the hammer head by 3 mm. Start the air hammer of the testing machine to drive the hammer head and compress the simulated sample between the two anvils. Adjust the pressure of the air hammer so that the sample bears a pressure of 210 Newtons. Then, start the hydraulic system to slowly move the main drive shaft towards the hammer head. When the two come into contact, the main drive shaft exerts a force on the hammer head, increasing the pressure on the sample to 260 Newtons, at which point the main drive shaft stops moving. Then, start the hydraulic system to retract the main drive shaft by 2.28 mm.

[0113] Step 5: Once the specimen reaches the predetermined deformation temperature, the hammer head is driven by the main drive shaft to compress and deform the specimen. The control of the main drive shaft movement is divided into two stages. The first stage is the acceleration stage, during which the running speed reaches 400 mm / s within 0-0.02 seconds. The second stage is the compression deformation stage, during which the running speed is 150 mm / s from 0.02 seconds until the end of the compression deformation.

[0114] In summary, this invention determines that the high-temperature compression experiment is divided into two stages: acceleration and deformation, by relating the momentum and impulse of the main drive shaft and the hammer. The speed of the main drive shaft in the two stages is calculated reasonably, thereby ensuring that the deformation rate of the sample remains constant throughout the deformation process. This can improve both experimental accuracy and success rate, and provide more effective guidance for actual production.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control system for the deformation rate in a high-temperature compression test, characterized in that, include: The main drive shaft is used to drive the hammer to compress and deform the sample. The hammerhead, which works in conjunction with the main drive shaft, is used to apply compressive force to the sample. The acceleration time control unit is used to control the acceleration process of the main drive shaft so that the main drive shaft reaches a preset speed within a preset time. The collision detection unit is used to detect the collision between the main drive shaft and the hammer head, and record the time and location of the collision. The speed calculation unit is used to calculate the speed of the main drive shaft after acceleration and the combined speed of the main drive shaft and the hammer head after collision, based on the mass of the main drive shaft, acceleration time, and the output of the collision detection unit. The formula for calculating the speed of the main drive shaft after acceleration is as follows: in, This indicates the speed of the main drive shaft after acceleration. This represents the momentum gained by the main drive shaft after being accelerated by the system force during the acceleration time; Indicates the mass of the main drive shaft; The formula for calculating the common velocity after the collision between the main drive shaft and the hammer is as follows: in, This indicates the common velocity after the main drive shaft collides with the hammer; Indicates the mass of the hammerhead; A function representing the change of frictional force over time; The displacement monitoring unit is used to monitor the displacement of the main drive shaft in real time and plot the displacement-time curve. The parameter adjustment unit is used to adjust the acceleration time and acceleration distance of the main drive shaft based on the displacement-time curve and the output of the rate calculation unit. The distance and pressure adjustment unit is used to adjust the initial distance between the main drive shaft and the hammer head before the compression test and to apply a preset pressure to the sample. The deformation control unit is used to control the movement of the main drive shaft in stages during the compression test to ensure that the specimen maintains a constant deformation rate throughout the deformation process.

2. The control system for deformation rate in a high-temperature compression test according to claim 1, characterized in that, The acceleration time control unit includes an acceleration drive module and a time control module, wherein: The acceleration drive module is used to provide acceleration power to the main drive shaft; The time control module is used to set the acceleration time of the main drive shaft and control the acceleration drive module to complete the acceleration process within a preset time.

3. The control system for the deformation rate in a high-temperature compression test according to claim 1, characterized in that, The collision detection unit includes a force sensor, a time recording module, and a displacement recording module, wherein: The force sensor is used to detect the collision force between the main drive shaft and the hammer head; The time recording module is used to record the time point when the collision occurs; The displacement recording module is used to record the displacement of the main drive shaft when a collision occurs.

4. The control system for deformation rate in a high-temperature compression test according to claim 1, characterized in that, The displacement monitoring unit includes a displacement sensor module and a data processing module, wherein: The displacement sensor module is used to monitor the displacement of the main drive shaft in real time; The data processing module is used to plot a displacement-time curve based on the output of the displacement sensor module and analyze the slope of the curve to obtain the acceleration time and acceleration distance.

5. The control system for the deformation rate in a high-temperature compression test according to claim 4, characterized in that, The data processing module analyzes the curve slope to determine acceleration time and acceleration distance, specifically including: Analyze the slope of the curve to obtain the speed of the main drive shaft after acceleration. and find out with The corresponding time is the acceleration time. ; The slope of the curve corresponds to the speed after the main drive shaft accelerates. The two parameters, namely the displacement of the main drive shaft and the corresponding parameters, are found to be... The corresponding displacement is the acceleration distance. .

6. The control system for the deformation rate in a high-temperature compression test according to claim 1, characterized in that, The parameter adjustment unit adjusts the operating speed of the main drive shaft based on the acceleration time and acceleration distance determined by the data processing module and the output of the speed calculation unit.

7. The control system for the deformation rate in a high-temperature compression test according to claim 1, characterized in that, The distance and pressure adjustment unit includes a distance adjustment module, a pressure adjustment module, and a contact detection module, wherein: The distance adjustment module is used to adjust the initial distance between the main drive shaft and the hammer head; The pressure regulating module is used to adjust the pressure of the air hammer so that the sample is subjected to a preset pressure, the preset pressure range being 100-300 Newtons. The contact detection module is used to detect whether there is contact between the main drive shaft and the hammer. When the two are in contact, the main drive shaft exerts a force on the hammer, which reduces the tensile force on the sample. When the reduction value is higher than 10 Newtons, the movement of the main drive shaft stops.

8. The control system for the deformation rate in a high-temperature compression test according to claim 1, characterized in that, The deformation control unit includes an acceleration phase control module and a deformation phase control module, wherein: The acceleration phase control module is used to control the main drive shaft to run at a preset speed within the range of 0 to acceleration time. The deformation stage control module is used to control the main drive shaft to run at the common speed after the collision during the entire deformation stage from the acceleration time to the end of the compression deformation.

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