Temperature measuring device

Abstract

The invention provides a temperature measuring device, and relates to the technical field of aluminum bar temperature measuring devices, the temperature measuring device comprises a fixed side temperature measuring assembly, a movable side temperature measuring assembly and a surface temperature measuring assembly, the fixed side temperature measuring assembly is installed behind a hollow motor permanent magnet of permanent magnet induction heating equipment, and the movable side temperature measuring assembly is installed on the surface of the permanent magnet induction heating equipment. The moving side temperature measuring assembly is arranged behind a moving side gripper of the permanent magnet induction heating equipment, and the surface temperature measuring assembly is arranged on the end face of a permanent magnet of the hollow motor. Through the design of the fixed side temperature measuring assembly, the movable side temperature measuring assembly and the surface temperature measuring assembly, automatic and flexible collection of the surface temperature of the aluminum bar core is achieved, meanwhile, the collection position is accurate and controllable, the detection precision of the aluminum bar gradient heating temperature of an aluminum bar can be greatly improved, the metal plasticity of a final aluminum bar extrusion part is improved, and the deformation resistance is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum rod temperature measuring devices, and in particular relates to a temperature measuring device. Background Art

[0002] During the aluminum extrusion process, the deformation and friction of the metal will lead to an increase in the extrusion temperature of the aluminum alloy, and the degree of extrusion temperature increase will increase with the increase of the extrusion speed. When the extrusion speed is too fast, it will cause uneven metal flow, and defects such as pitting and cracks will appear on the surface of the product. On the contrary, when the extrusion speed is too slow, it will affect the extrusion production efficiency. Before the aluminum extrusion process, the aluminum rod needs to be preheated in order to improve the metal plasticity, reduce deformation resistance, and make the metal easy to flow; Gradient heating of aluminum bars refers to forming a temperature gradient in the length direction of the aluminum bars before they are loaded into the extruder. Due to the large thermal conductivity of aluminum alloys, it is difficult to generate an accurate temperature gradient in the aluminum bars by conventional fuel heating methods, and it is impossible to maintain the gradient. Therefore, an electromagnetic induction heating system must be used, and its heating method is to heat one end or segment of the aluminum bars. Reasonable design of the temperature gradient of the aluminum bars can increase the extrusion speed and make the extrusion process similar to isothermal extrusion. When preheating an aluminum rod, the existing electromagnetic induction heating system requires manual temperature measurement at various positions along the length of the aluminum rod to ensure that every part of the aluminum rod is heated to the preheating temperature. This is not only time-consuming and labor-intensive, but also prone to wrong position measurement, and the temperature of the rod core end cannot be measured. Summary of the invention

[0003] The present invention provides a temperature measuring device to solve at least one of the above-mentioned technical problems.

[0004] In order to solve the above technical problems, the present invention discloses a temperature measuring device, including a fixed-side temperature measuring component, a mobile-side temperature measuring component and a surface temperature measuring component. The fixed-side temperature measuring component is installed behind the permanent magnet of a hollow motor of a permanent magnet induction heating device, the mobile-side temperature measuring component is arranged behind the mobile-side gripper of the permanent magnet induction heating device, and the surface temperature measuring component is arranged on the end face of the permanent magnet of the hollow motor. The fixed-side temperature measuring component and the mobile-side temperature measuring component are respectively used to collect the temperatures of the two end faces of the aluminum rod, and the surface temperature measuring component is used to collect the surface temperatures at different positions in the length direction of the aluminum rod.

[0005] Preferably, the fixed side temperature measuring assembly includes a fixed side ejection cylinder, which is mounted on a fixed side cylinder fixing seat, which is mounted on a permanent magnet induction heating device, a fixed side temperature measuring rod is fixedly connected to the end of the fixed side ejection cylinder, a fixed side reset elastic member is sleeved on the fixed side temperature measuring rod, and a fixed side gripper is installed on the outside of the fixed side temperature measuring rod.

[0006] Preferably, the mobile side temperature measuring assembly includes a mobile side ejection cylinder, which is mounted on a mobile side cylinder fixing seat, which is mounted on a permanent magnet induction heating device, a mobile side temperature measuring rod is fixedly connected to the end of the mobile side ejection cylinder, a mobile side reset elastic member is sleeved on the mobile side temperature measuring rod, and a mobile side gripper is installed on the outside of the mobile side temperature measuring rod.

[0007] Preferably, the surface temperature measuring component includes a surface temperature measuring cylinder support, a surface temperature measuring cylinder and a surface temperature measuring probe. The surface temperature measuring cylinder support is fixedly connected to the end face of the hollow motor permanent magnet, the surface temperature measuring cylinder is installed on the surface temperature measuring cylinder support, and the surface temperature measuring probe is installed at the working end of the surface temperature measuring cylinder.

[0008] Preferably, it also includes a surface temperature measurement component self-test module, which is used to perform self-test on the surface temperature measurement component. The surface temperature measurement component self-test module includes: The time division unit is used to divide the total heating time at a certain length position of the aluminum rod to obtain a number of self-test collection moments; A non-contact self-test temperature collection unit is provided on the end face of the permanent magnet of the hollow motor, and is used to collect the surface temperature value of the aluminum rod as the self-test surface temperature value at each self-test collection moment; A surface temperature measurement component temperature measurement result prediction matrix construction unit is used to construct a surface temperature measurement component temperature measurement result prediction matrix based on each self-test surface temperature value, and predict the predicted detection value of the surface temperature measurement component after the total heating time ends based on the surface temperature measurement component temperature measurement result prediction matrix; The pressure collection unit is used to collect the contact pressure between the surface temperature measuring probe and the aluminum rod at the last moment of the total heating time; The fault judgment unit is used to calculate the actual fault self-detection coefficient of the surface temperature measuring component based on the predicted detection value of the surface temperature measuring component, the actual detection value of the surface temperature measuring component, the contact pressure between the surface temperature measuring probe and the aluminum rod, and the minimum contact pressure between the surface temperature measuring probe and the aluminum rod. If the actual fault self-detection coefficient of the surface temperature measuring component is greater than the preset fault self-detection coefficient of the surface temperature measuring component, a maintenance alarm prompt is issued.

[0009] Preferably, the surface temperature measurement component temperature measurement result prediction matrix is ​​constructed based on each self-test surface temperature value as follows: ;in, The surface temperature measurement component temperature measurement result prediction matrix is ​​constructed by dividing the total heating time at the xth length of the aluminum rod into i self-test collection moments. is the self-test surface temperature value at the first self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the second self-test collection time at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the third self-test collection time at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the i-2th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the i-1th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, The self-test surface temperature value at the i-3th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit; The predicted detection value of the surface temperature measurement component after the total heating time is completed based on the temperature measurement result prediction matrix of the surface temperature measurement component is predicted as follows: the mean of all matrix elements in the third column of the temperature measurement result prediction matrix of the surface temperature measurement component constructed by dividing the total heating time at the x-th length of the aluminum rod into i self-test collection moments is calculated, and the values ​​of all matrix elements in the third row of the temperature measurement result prediction matrix of the surface temperature measurement component constructed by dividing the total heating time at the x-th length of the aluminum rod into i self-test collection moments are replaced with the same value as the mean of all matrix elements in the third column to obtain a new matrix, and the rank of the new matrix is ​​used as the predicted value of the self-test surface temperature value at the i-th self-test collection moment at the x-th length, that is, the predicted detection value of the surface temperature measurement component after the total heating time is completed.

[0010] Preferably, based on the predicted detection value of the surface temperature measuring component, the actual detection value of the surface temperature measuring component, the contact pressure between the surface temperature measuring probe and the aluminum rod, and the minimum contact pressure between the surface temperature measuring probe and the aluminum rod, the actual fault self-detection coefficient of the surface temperature measuring component is calculated as follows: ;in, is the actual fault self-detection coefficient of the surface temperature measurement component, is the weight of the temperature error, is the predicted detection value of the surface temperature measurement component at the xth length, is the actual detection value of the surface temperature measuring component at the xth length, is the temperature compensation coefficient, is the weight of the pressure error, is the pressure compensation coefficient, lg is the logarithm with base 10, is the minimum contact pressure between the surface temperature probe and the aluminum rod, is the contact pressure between the surface temperature probe and the aluminum rod.

[0011] Preferably, it also includes a gradient heating effect acceptance module, which is used to accept the temperature gradient formed after the aluminum rod is heated based on the detection value of the surface temperature measurement component; Based on the detection value of the surface temperature measuring component, calculate the temperature gradient coefficient after the aluminum rod is heated: ; in, is the temperature gradient coefficient after the aluminum rod is heated, m is the total number of gradient points collected by the surface temperature measurement component designed along the axis of the aluminum rod, For the The temperature value collected by the surface temperature measurement component at each gradient point, For the The temperature value collected by the surface temperature measurement component at each gradient point, is the base gradient difference of adjacent gradient points; If the temperature gradient coefficient of the aluminum rod after heating exceeds the preset temperature gradient coefficient value range, the heating of the aluminum rod fails, otherwise the heating is qualified.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) In the present invention, during the heating process, the fixed-side temperature measuring component and the movable-side temperature measuring component are in contact with the two end surfaces of the aluminum rod respectively, and are used to collect the temperature values ​​of the two end surfaces of the aluminum rod respectively. The surface temperature measuring component can follow the hollow motor permanent magnet to move along the length direction of the aluminum rod, so as to collect the surface temperature at different positions along the length direction of the aluminum rod. The design of the fixed-side temperature measuring component, the movable-side temperature measuring component and the surface temperature measuring component realizes the automatic and flexible collection of the core surface temperature of the aluminum rod. At the same time, the collection position is precisely controllable, which can greatly improve the detection accuracy of the gradient heating temperature of the aluminum rod, improve the metal plasticity of the final aluminum rod extrusion, and reduce the deformation resistance; (2) The surface temperature measurement component self-checking module of the present invention realizes real-time surface temperature measurement component fault detection and early warning, greatly reducing the risk of equipment failure, increasing the reliability of the system, and reducing the errors that may accumulate during long-term operation by dynamically adjusting the temperature and pressure data; (3) The design of the gradient heating effect acceptance module of the present invention can realize the acceptance of the aluminum rod during the temperature measurement process to ensure that the temperature gradient of the aluminum rod after heating reaches the expected standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the permanent magnet induction heating device of the present invention; Figure 2 A schematic diagram of the structure of the fixed-side temperature measuring component of the present invention; Figure 3 A three-dimensional diagram of the fixed-side temperature measurement assembly of the present invention; Figure 4This is a schematic diagram of the structure of the mobile side temperature measurement component of the present invention; Figure 5 A three-dimensional diagram of the mobile side temperature measurement component of the present invention; Figure 6 This is a three-dimensional diagram of the surface temperature measurement component of the present invention.

[0014] In the figure: 1. Fixed side temperature measuring assembly; 100. Fixed side ejection cylinder; 101. Fixed side cylinder fixing seat; 102. Fixed side reset elastic member; 103. Fixed side temperature measuring rod; 104. Fixed side gripper; 2. Mobile side temperature measuring assembly; 200. Mobile side ejection cylinder; 201. Mobile side cylinder fixing seat; 202. Mobile side reset elastic member; 203. Mobile side temperature measuring rod; 3. Surface temperature measuring assembly; 300. Surface temperature measuring cylinder support; 301. Surface temperature measuring cylinder; 302. Surface temperature measuring probe; 4. Permanent magnet induction heating equipment; 400. Hollow motor permanent magnet; 401. Mobile side gripper; 5. Aluminum rod. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0016] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0017] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides a temperature measuring device, such as Figure 1-Figure 6As shown, it includes a fixed-side temperature measuring component 1, a mobile-side temperature measuring component 2 and a surface temperature measuring component 3, wherein the fixed-side temperature measuring component 1 is installed behind the hollow motor permanent magnet 400 of the permanent magnet induction heating device 4, the mobile-side temperature measuring component 2 is arranged behind the mobile-side gripper 401 of the permanent magnet induction heating device 4, and the surface temperature measuring component 3 is arranged on the end face of the hollow motor permanent magnet 400. The fixed-side temperature measuring component 1 and the mobile-side temperature measuring component 2 are respectively used to collect the temperatures of the two end faces of the aluminum rod 5, and the surface temperature measuring component 3 is used to collect the surface temperatures at different positions along the length direction of the aluminum rod 5.

[0018] Preferably, the permanent magnet induction heating device 4 includes a permanent magnet system, a mechanical transmission system and a measurement and control system, wherein the permanent magnet system is composed of a hollow motor permanent magnet 400, a permanent magnet fixing seat, a heat insulation ring, and a permanent magnet air cooling system; the mechanical transmission system is composed of an electric cylinder tightening device, an electric cylinder moving device and a linear guide rail; the measurement and control system uses PLC as the control core, integrates system control and protection functions, and realizes automatic operation; The working process of the permanent magnet induction heating equipment 4 is that the hollow motor permanent magnet 400 moves to the initial position of the fixed end under the action of the electric cylinder, and the bracket rises to the standard position. Then the manipulator or truss grabs the aluminum rod 5 and places it above the bracket. Then the mobile side gripper 401 moves and presses the aluminum rod 5 under the action of the electric cylinder, and then the bracket drops to the initial position. Then the hollow motor permanent magnet 400 moves to the position of the aluminum rod 5 under the action of the electric cylinder and starts to rotate and heat. During the heating process, the electric cylinder drives the hollow motor permanent magnet 400 to reciprocate to achieve uniform or gradient heating of the aluminum rod. During this process, the fixed side temperature measuring component 1 and the mobile side temperature measuring component 2 are respectively used to collect the temperatures of the two end surfaces of the aluminum rod 5, and the surface temperature measuring component 3 is used to collect the surface temperatures at different positions in the length direction of the aluminum rod 5 to monitor the core surface temperature of the aluminum rod 5. After the heating is completed, the hollow motor permanent magnet 400 moves to the initial position of the fixed end, the bracket rises, and the auxiliary backward movement is performed. The end ejection cylinder operates to eject the aluminum rod, and then the manipulator grabs the heated aluminum rod.

[0019] The working principle and beneficial effects of the above technical solution are as follows: during the heating process, the fixed-side temperature measuring component 1 and the movable-side temperature measuring component 2 are in contact with the two end surfaces of the aluminum rod 5 respectively, so as to collect the temperature values ​​of the two end surfaces of the aluminum rod 5; the surface temperature measuring component 3 can follow the hollow motor permanent magnet 400 to move along the length direction of the aluminum rod 5, thereby collecting the surface temperature at different positions along the length direction of the aluminum rod 5; the design of the fixed-side temperature measuring component 1, the movable-side temperature measuring component 2 and the surface temperature measuring component 3 realizes the automatic and flexible collection of the core surface temperature of the aluminum rod 5; at the same time, the collection position is precisely controllable, which can greatly improve the detection accuracy of the gradient heating temperature of the aluminum rod 5, improve the metal plasticity of the final aluminum rod extrusion, and reduce the deformation resistance.

[0020] Example 2 On the basis of Example 1, the fixed side temperature measuring assembly 1 includes a fixed side ejection cylinder 100, which is installed on a fixed side cylinder fixing seat 101, and the fixed side cylinder fixing seat 101 is installed on the permanent magnet induction heating device 4. The end of the fixed side ejection cylinder 100 is fixedly connected with a fixed side temperature measuring rod 103, and the fixed side temperature measuring rod 103 is sleeved with a fixed side reset elastic member 102, and a fixed side gripper 104 is installed on the outside of the fixed side temperature measuring rod 103.

[0021] The working principle and beneficial effects of the above technical solution are as follows: when measuring temperature, the fixed side ejection cylinder 100 extends, driving the fixed side temperature measuring rod 103 to extend to contact the end surface of the aluminum rod 5, thereby measuring the rod core temperature at one end.

[0022] Example 3 On the basis of Example 1, the mobile side temperature measuring component 2 includes a mobile side ejection cylinder 200, which is installed on a mobile side cylinder fixing seat 201, and the mobile side cylinder fixing seat 201 is installed on a permanent magnet induction heating device 4. The end of the mobile side ejection cylinder 200 is fixedly connected with a mobile side temperature measuring rod 203, and the mobile side temperature measuring rod 203 is sleeved with a mobile side reset elastic member 202, and a mobile side gripper 401 is installed on the outside of the mobile side temperature measuring rod 203.

[0023] The working principle and beneficial effects of the above technical solution are as follows: when measuring temperature, the ejection cylinder 200 on the movable side extends, driving the movable side temperature measuring rod 203 to extend to contact the end surface of the aluminum rod 5, thereby measuring the rod core temperature at the other end.

[0024] Example 4 Based on Example 1, the surface temperature measuring component 3 includes a surface temperature measuring cylinder support 300, a surface temperature measuring cylinder 301 and a surface temperature measuring probe 302. The surface temperature measuring cylinder support 300 is fixedly connected to the end face of the hollow motor permanent magnet 400, the surface temperature measuring cylinder 301 is installed on the surface temperature measuring cylinder support 300, and the surface temperature measuring probe 302 is installed at the working end of the surface temperature measuring cylinder 301.

[0025] The working principle and beneficial effects of the above technical solution: the movement of the hollow motor permanent magnet 400 drives the surface temperature measuring component 3 to move. When the surface temperature measuring component 3 measures the temperature, the surface temperature measuring cylinder 301 extends so that the surface temperature measuring probe 302 contacts the surface of the aluminum rod 5, thereby measuring the surface temperature of the aluminum rod 5.

[0026] Example 5 On the basis of Example 4, it also includes a surface temperature measurement component self-test module, which is used to perform self-test on the surface temperature measurement component 3. The surface temperature measurement component self-test module includes: A time division unit is used to divide the total heating time at a certain length position of the aluminum rod 5 to obtain a number of self-test collection moments; A non-contact self-test temperature collection unit, which is arranged on the end surface of the hollow motor permanent magnet 400 and is used to collect the surface temperature value of the aluminum rod 5 as the self-test surface temperature value at each self-test collection moment; A surface temperature measurement component temperature measurement result prediction matrix construction unit is used to construct a surface temperature measurement component temperature measurement result prediction matrix based on each self-test surface temperature value, and predict the predicted detection value of the surface temperature measurement component 3 after the total heating time ends based on the surface temperature measurement component temperature measurement result prediction matrix; A pressure collection unit is used to collect the contact pressure between the surface temperature measuring probe 302 and the aluminum rod 5 at the last moment of the total heating time; The fault judgment unit is used to calculate the actual fault self-detection coefficient of the surface temperature measuring component 3 based on the predicted detection value of the surface temperature measuring component 3, the actual detection value of the surface temperature measuring component 3, the contact pressure between the surface temperature measuring probe 302 and the aluminum rod 5, and the minimum contact pressure between the surface temperature measuring probe 302 and the aluminum rod 5. If the actual fault self-detection coefficient of the surface temperature measuring component 3 is greater than the preset fault self-detection coefficient of the surface temperature measuring component 3, a maintenance alarm prompt is issued.

[0027] Preferably, the surface temperature measurement component temperature measurement result prediction matrix is ​​constructed based on each self-test surface temperature value as follows: ; in, The surface temperature measurement component temperature measurement result prediction matrix is ​​constructed by dividing the total heating time at the x-th length of the aluminum rod 5 into i self-test collection moments. is the self-test surface temperature value at the first self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the second self-test collection time at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the third self-test collection time at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the i-2th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the i-1th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, The self-test surface temperature value at the i-3th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit; The predicted detection value of the surface temperature measurement component 3 after the total heating time is completed based on the surface temperature measurement component temperature measurement result prediction matrix is ​​predicted as follows: the mean of all matrix elements in the third column of the surface temperature measurement component temperature measurement result prediction matrix constructed by dividing the total heating time of the aluminum rod 5 at the x-th length into i self-test collection moments is calculated, and the values ​​of all matrix elements in the third row of the surface temperature measurement component temperature measurement result prediction matrix constructed by dividing the total heating time of the aluminum rod 5 at the x-th length into i self-test collection moments are replaced with the same values ​​as the mean of all matrix elements in the third column to obtain a new matrix, and the rank of the new matrix is ​​used as the predicted value of the self-test surface temperature value at the i-th self-test collection moment at the x-th length, that is, the predicted detection value of the surface temperature measurement component 3 after the total heating time is completed.

[0028] The working principle and beneficial effects of the above technical solution are as follows: by dividing the heating time into multiple self-checking moments for temperature collection, the temperature measurement accuracy and data reliability are improved, and a method for constructing a temperature measurement result prediction matrix of the surface temperature measurement component allows the performance of the surface temperature measurement component 3 to be predicted under changing temperature conditions, ensuring the normal operation of the surface temperature measurement component 3, collecting temperature and pressure data, and automatically calculating the fault self-checking coefficient, thereby realizing real-time surface temperature measurement component 3 fault detection and early warning, greatly reducing the risk of equipment failure, and increasing the reliability of the system, and reducing the errors that may accumulate during long-term operation by dynamically adjusting the temperature and pressure data.

[0029] Example 6 On the basis of Example 4, based on the predicted detection value of the surface temperature measuring component 3, the actual detection value of the surface temperature measuring component 3, the contact pressure between the surface temperature measuring probe 302 and the aluminum rod 5, and the minimum contact pressure between the surface temperature measuring probe 302 and the aluminum rod 5, the actual fault self-detection coefficient of the surface temperature measuring component 3 is calculated as follows: ;in, is the actual fault self-detection coefficient of the surface temperature measurement component 3, is the weight of the temperature error, is the predicted detection value of the surface temperature measuring component 3 at the xth length, is the actual detection value of the surface temperature measuring component 3 at the xth length, is the temperature compensation coefficient, is the weight of the pressure error, is the pressure compensation coefficient, lg is the logarithm with base 10, is the minimum contact pressure between the surface temperature probe 302 and the aluminum rod 5, is the contact pressure between the surface temperature measuring probe 302 and the aluminum rod 5.

[0030] The working principle and beneficial effects of the above technical solution are as follows: the calculation of the actual fault self-detection coefficient of the surface temperature measuring component 3 can more accurately reflect the actual state of the system, improve the accuracy of fault detection, and perform real-time monitoring and adjustment to ensure that the system can quickly identify and respond to potential faults of the surface temperature measuring component 3 during operation, thereby improving the overall reliability and operational stability of the surface temperature measuring component 3. Through timely fault warning and accurate fault location, the reliability of the temperature measuring device can be greatly improved.

[0031] Example 7 On the basis of Example 1, it also includes a gradient heating effect acceptance module, which is used to accept the temperature gradient formed after the aluminum rod 5 is heated based on the detection value of the surface temperature measurement component 3; Based on the detection value of the surface temperature measuring component 3, the temperature gradient coefficient of the aluminum rod 5 after heating is calculated: ; in, is the temperature gradient coefficient of the aluminum rod 5 after heating, m is the total number of gradient points collected by the surface temperature measurement component 3 designed along the axis direction of the aluminum rod 5, For the The temperature value collected by the surface temperature measurement component 3 at each gradient point, For the The temperature value collected by the surface temperature measurement component 3 at each gradient point, is the base gradient difference of adjacent gradient points; If the temperature gradient coefficient of the aluminum rod 5 after heating exceeds the preset temperature gradient coefficient value range, the heating of the aluminum rod 5 is unqualified, otherwise the heating is qualified.

[0032] The working principle and beneficial effects of the above technical solution are as follows: the temperature gradient coefficient of the aluminum rod 5 after heating is calculated based on the detection value of the surface temperature measuring component 3, and the temperature gradient coefficient of the aluminum rod 5 after heating is obtained by comparing the temperature difference between two adjacent gradient points with the reference gradient difference of the adjacent gradient points. If the temperature gradient coefficient of the aluminum rod 5 after heating exceeds the preset temperature gradient coefficient value range, the heating of the aluminum rod 5 is unqualified, otherwise the heating is qualified. The aluminum rod 5 can be accepted during the temperature measurement process through the gradient heating effect acceptance module.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A temperature measuring device, characterized in that: The invention comprises a fixed-side temperature measuring component (1), a movable-side temperature measuring component (2) and a surface temperature measuring component (3); the fixed-side temperature measuring component (1) is installed behind a hollow motor permanent magnet (400) of a permanent magnet induction heating device (4); the movable-side temperature measuring component (2) is arranged behind a movable-side gripper (401) of the permanent magnet induction heating device (4); and the surface temperature measuring component (3) is arranged on the end surface of the hollow motor permanent magnet (400); the fixed-side temperature measuring component (1) and the movable-side temperature measuring component (2) are respectively used to collect the temperatures of the two end surfaces of an aluminum rod (5); and the surface temperature measuring component (3) is used to collect the surface temperatures at different positions along the length direction of the aluminum rod (5).

2. A temperature measuring device according to claim 1, characterized in that: The fixed side temperature measuring assembly (1) comprises a fixed side ejection cylinder (100), the fixed side ejection cylinder (100) being mounted on a fixed side cylinder fixing seat (101), the fixed side cylinder fixing seat (101) being mounted on a permanent magnet induction heating device (4), a fixed side temperature measuring rod (103) being fixedly connected to the end of the fixed side ejection cylinder (100), a fixed side reset elastic member (102) being sleeved on the fixed side temperature measuring rod (103), and a fixed side gripper (104) being mounted on the outer side of the fixed side temperature measuring rod (103).

3. A temperature measuring device according to claim 1, characterized in that: The mobile side temperature measuring assembly (2) comprises a mobile side ejection cylinder (200), the mobile side ejection cylinder (200) being mounted on a mobile side cylinder fixing seat (201), the mobile side cylinder fixing seat (201) being mounted on a permanent magnet induction heating device (4), a mobile side temperature measuring rod (203) being fixedly connected to the end of the mobile side ejection cylinder (200), a mobile side reset elastic member (202) being sleeved on the mobile side temperature measuring rod (203), and a mobile side gripper (401) being mounted on the outer side of the mobile side temperature measuring rod (203).

4. A temperature measuring device according to claim 1, characterized in that: The surface temperature measuring assembly (3) comprises a surface temperature measuring cylinder support (300), a surface temperature measuring cylinder (301) and a surface temperature measuring probe (302); the surface temperature measuring cylinder support (300) is fixedly connected to the end surface of the hollow motor permanent magnet (400); the surface temperature measuring cylinder (301) is mounted on the surface temperature measuring cylinder support (300); and the surface temperature measuring probe (302) is mounted on the working end of the surface temperature measuring cylinder (301).

5. A temperature measuring device according to claim 4, characterized in that: It also includes a surface temperature measurement component self-test module, which is used to perform self-test on the surface temperature measurement component (3). The surface temperature measurement component self-test module includes: A time division unit, used for dividing the total heating time at a certain length position of the aluminum rod (5) to obtain a plurality of self-test collection moments; A non-contact self-test temperature collection unit, the non-contact self-test temperature collection unit being arranged on the end surface of the hollow motor permanent magnet (400) and being used to collect the surface temperature value of the aluminum rod (5) as the self-test surface temperature value at each self-test collection moment; A surface temperature measurement component temperature measurement result prediction matrix construction unit is used to construct a surface temperature measurement component temperature measurement result prediction matrix based on each self-test surface temperature value, and to predict a predicted detection value of the surface temperature measurement component (3) after the total heating time ends based on the surface temperature measurement component temperature measurement result prediction matrix; A pressure collection unit, used to collect the contact pressure between the surface temperature measuring probe (302) and the aluminum rod (5) at the last moment of the total heating time; The fault judgment unit is used to calculate an actual fault self-detection coefficient of the surface temperature measurement component (3) based on the predicted detection value of the surface temperature measurement component (3), the actual detection value of the surface temperature measurement component (3), the contact pressure between the surface temperature measurement probe (302) and the aluminum rod (5), and the minimum contact pressure between the surface temperature measurement probe (302) and the aluminum rod (5); if the actual fault self-detection coefficient of the surface temperature measurement component (3) is greater than the preset fault self-detection coefficient of the surface temperature measurement component (3), a maintenance alarm prompt is issued.

6. A temperature measuring device according to claim 5, characterized in that: The prediction matrix of the temperature measurement result of the surface temperature measurement component is constructed based on each self-test surface temperature value as follows: ； in, The surface temperature measurement component temperature measurement result prediction matrix is ​​constructed by dividing the total heating time at the x-th length of the aluminum rod (5) into i self-test collection moments. is the self-test surface temperature value at the first self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the second self-test collection time at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the third self-test collection time at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the i-2th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, is the self-test surface temperature value at the i-1th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit, The self-test surface temperature value at the i-3th self-test collection moment at the xth length collected by the non-contact self-test temperature collection unit; The predicted detection value of the surface temperature measurement component (3) after the total heating time is completed based on the surface temperature measurement component temperature measurement result prediction matrix is ​​specifically: the mean of all matrix elements in the third column of the surface temperature measurement component temperature measurement result prediction matrix constructed by dividing the total heating time of the aluminum rod (5) at the xth length into i self-test collection moments is calculated, and the values ​​of all matrix elements in the third row of the surface temperature measurement component temperature measurement result prediction matrix constructed by dividing the total heating time of the aluminum rod (5) at the xth length into i self-test collection moments are replaced with the same value as the mean of all matrix elements in the third column to obtain a new matrix, and the rank of the new matrix is ​​used as the predicted value of the self-test surface temperature value at the i-th self-test collection moment at the xth length, that is, the predicted detection value of the surface temperature measurement component (3) after the total heating time is completed.

7. A temperature measuring device according to claim 5, characterized in that: Based on the predicted detection value of the surface temperature measurement component (3), the actual detection value of the surface temperature measurement component (3), the contact pressure between the surface temperature measurement probe (302) and the aluminum rod (5), and the minimum contact pressure between the surface temperature measurement probe (302) and the aluminum rod (5), the actual fault self-detection coefficient of the surface temperature measurement component (3) is calculated as follows: ； in, is the actual fault self-detection coefficient of the surface temperature measurement component (3), is the weight of the temperature error, is the predicted detection value of the surface temperature measurement component (3) at the xth length, is the actual detection value of the surface temperature measuring component (3) at the xth length, is the temperature compensation coefficient, is the weight of the pressure error, is the pressure compensation coefficient, lg is the logarithm with base 10, is the minimum contact pressure between the surface temperature probe (302) and the aluminum rod (5), is the contact pressure between the surface temperature measuring probe (302) and the aluminum rod (5).

8. A temperature measuring device according to claim 1, characterized in that: It also includes a gradient heating effect acceptance module, which is used to accept the temperature gradient formed after the aluminum rod (5) is heated based on the detection value of the surface temperature measurement component (3); Based on the detection value of the surface temperature measuring component (3), the temperature gradient coefficient of the aluminum rod (5) after heating is calculated: ； in, is the temperature gradient coefficient of the aluminum rod (5) after heating, m is the total number of gradient points collected by the surface temperature measurement component (3) designed along the axial direction of the aluminum rod (5), For the The temperature value collected by the surface temperature measurement component (3) at each gradient point, For the The temperature value collected by the surface temperature measurement component (3) at each gradient point, is the baseline gradient difference of adjacent gradient points; If the temperature gradient coefficient of the aluminum rod (5) after heating exceeds the preset temperature gradient coefficient value range, the heating of the aluminum rod (5) is unqualified; otherwise, the heating is qualified.

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