Practical training teaching aid for stress monitoring of component

Abstract

The invention discloses a stress monitoring practical training teaching aid for a component, and relates to the technical field of teaching aids. The stress monitoring practical training teaching aid for the component comprises a support frame; the component mounting assembly is movably arranged on the supporting frame, a component is detachably arranged on the component mounting assembly, and the moving track of the component mounting assembly is the same as the design track of the component; the pressure applying assembly is arranged on the supporting frame in a lifting mode and located on the top of the component; and the angle sensor is arranged at the end part of the component and is used for detecting the inclination angle of the component. When the strain of a plurality of points of the component needs to be detected, only the position of the component mounting assembly needs to be moved, and the component mounting assembly can drive the component to move until the predicted point is aligned with the pressure applying assembly; therefore, the stress monitoring practical training teaching aid can improve the teaching efficiency under the condition that the measurement data of the practical training teaching aid is ensured to be accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of teaching aids, in particular to a force monitoring practical training teaching aid of a component. BACKGROUND

[0002] The component monitoring practical training teaching aid plays an important role in the field of engineering education. It provides students with an intuitive learning experience by simulating actual working conditions. With the continuous progress of engineering education, the role of such teaching aids in improving students' practical ability and deepening their understanding of theoretical knowledge has become increasingly prominent. From early simple static models to today's dynamic teaching aids that can simulate complex stress conditions, the development not only reflects the innovation of teaching philosophy, but also embodies the progress and innovation of engineering technology.

[0003] In the prior art, to achieve the teaching demonstration of the mechanical properties of the component, the following methods are usually used: one is to directly apply pressure or bending moment using a simple loading device and observe the deformation of the component; another is to measure the displacement or angle change of the component by means of manual measuring tools such as vernier calipers or angle rulers; and the third is to use independent detection instruments to measure stress, strain and perpendicularity parameters respectively.

[0004] However, the existing practical training teaching aids have low accuracy in the teaching demonstration of the strain of the component through direct observation of the deformation of the component and manual measurement. Through the detection instrument, in the process of measuring multiple points of the component, the position and parameters of the detection instrument need to be adjusted and corrected every time a point is changed, which is cumbersome and reduces the teaching efficiency. SUMMARY

[0005] In view of the defects in the prior art, the technical problem solved by the present application is how to improve the teaching efficiency while ensuring the accuracy of the measurement data of the practical training teaching aid.

[0006] To achieve the above purpose, the practical training teaching aid for force monitoring of a component provided by the present application comprises: a support frame; a component mounting assembly movably arranged on the support frame, a component being detachably arranged on the component mounting assembly, and the movement track of the component mounting assembly being the same as the designed track of the component; a pressure applying assembly being arranged on the support frame in a lifting manner and located at the top of the component; an angle sensor arranged at the end of the component, the angle sensor being used for detecting the inclination angle of the component.

[0007] By adopting the technical scheme, the position of the component is fixed and supported by mounting the component on the component mounting assembly, and then the predicted point on the component is pressed by the pressing assembly, when the component is strained, the pressing point is concave, so that the end of the component is bent, and the angle sensor arranged at the end of the component can detect the bending angle of the end of the component, and the strain condition of the component is judged by the cosine theorem; when the strains of multiple points of the component need to be detected, the position of the component mounting assembly only needs to be moved, and the component mounting assembly drives the component to move until the predicted point is aligned with the pressing assembly; therefore, the force monitoring practical teaching aid can improve the teaching efficiency while ensuring the accuracy of the measured data of the practical teaching aid.

[0008] In an embodiment, the pressing assembly comprises a first pressing assembly, the first pressing assembly comprises a first lead screw, a first hand wheel and a first pushing piece, the first lead screw is arranged in the support frame, and the first lead screw is threadedly connected with the first thread formed in the support frame, one end of the first lead screw away from the component is provided with the first hand wheel, and the other end of the first lead screw close to the component is provided with the first pushing piece, and the moving direction of the first pushing piece is perpendicular to the side surface of the component.

[0009] By adopting the technical scheme, the pressing assembly can be installed and lifted on the top of the support frame, and the force applied to the component can be judged by controlling the specification of the lead screw to detect the side strain of the component.

[0010] In an embodiment, the component is sleeved with a force transmitter, and the force transmitter is movably arranged on the component, a groove is formed in the side of the force transmitter close to the first pushing piece, and the first pushing piece can move along the inner wall of the groove.

[0011] By adopting the technical scheme, the point pressure applied to the component can be changed to surface pressure, more pressing requirements can be met, the first pushing piece can enter the groove without pressing the bottom of the groove, and the position of the groove on the component can be changed.

[0012] In an embodiment, the component mounting assembly comprises a first mounting piece, a second mounting piece and a moving piece, the opposite surfaces of the first mounting piece and the second mounting piece are provided with mounting grooves, one end of the component is located in the mounting groove of the first mounting piece, the other end of the component is located in the mounting groove of the second mounting piece, and the moving piece is used to drive the first mounting piece and the second mounting piece to move.

[0013] By adopting the technical scheme, the installation and disassembly of the component can be facilitated by the movement of the first mounting piece and the second mounting piece, the component can be suitable for components with different lengths and thicknesses, and the design of the mounting grooves can provide space for the end of the component to be raised upward when the component is strained.

[0014] In one embodiment, the moving part comprises a first slider, a second slider and a driving motor, the bottom of the support frame is provided with a sliding groove, the driving motor is used to drive the first slider and the second slider to move in the sliding groove, the first slider is fixedly connected with the bottom of the first mounting part, and the second slider is fixedly connected with the bottom of the second mounting part.

[0015] By adopting the above technical scheme, the first mounting part and the second mounting part can move individually, and the moving distance can be set.

[0016] In one embodiment, the pressure applying assembly further comprises a second pressure applying assembly, the second pressure applying assembly comprises a second screw rod, a second hand wheel and a second pushing part, the second screw rod is arranged in the support frame, and the second screw rod is threadedly connected with a second screw thread arranged in the support frame, the second screw rod is provided with the second hand wheel at two ends away from the component, the second screw rod is provided with the second pushing part at two ends close to the component, and the moving direction of the second pushing part is perpendicular to the end face of the component.

[0017] By adopting the above technical scheme, the pressure applying assembly can be conveniently installed and telescoped on the side of the support frame, and the force applied to the component can be judged by controlling the specification of the screw rod, so that the end face strain of the component can be detected.

[0018] In one embodiment, the first slider is provided with a first locking part, and the second slider is provided with a second locking part.

[0019] By adopting the above technical scheme, when the component is strained, the distance between the first mounting part and the second mounting part changes, the distance between the first mounting part and the second mounting part can change with the strain of the component by locking the second locking part, not locking the first locking part and applying a certain pushing force by the second pressure applying assembly.

[0020] In one embodiment, the first mounting part is provided with a displacement sensor, so as to measure the moving distance of the component and the distance change between two ends of the component when the component is deformed.

[0021] By adopting the above technical scheme, the distance change between two ends of the component when the component is strained can be conveniently observed, and the position of the component can be judged by the displacement sensor, so as to judge whether the first pressure applying assembly is aligned with the predicted point.

[0022] In one embodiment, a telescopic assembly is arranged between the displacement sensor and the support frame, the telescopic assembly comprises a fixed seat and a telescopic rod, the fixed seat is fixedly arranged on the support frame, one end of the telescopic rod is telescopically arranged in the fixed seat, and the other end of the telescopic rod is fixed to the displacement sensor, so as to measure the moving distance of the telescopic rod by the displacement sensor.

[0023] By adopting the technical scheme, the moving distance of the telescopic rod is the same as the moving distance of the component and the distance of the component strain change, so that measurement is more convenient and accurate.

[0024] In an embodiment, the force monitoring practical training teaching aid further comprises a control terminal.

[0025] By adopting the technical scheme, the electric control of the teaching aid is facilitated, and the collected data is collected and analyzed.

[0026] In summary, the present application has the following at least one beneficial technical effect: 1. By mounting the component to the component mounting assembly, the position of the component is fixed and supported, and then the predicted point on the component is pressed by the pressing assembly. When the component is strained, the pressing point will be depressed, causing the end of the component to bend. Therefore, the angle sensor arranged at the end of the component can detect the bending angle of the end of the component, and the strain of the component is determined by the cosine theorem. When multiple points of the component need to be detected, the position of the component mounting assembly only needs to be moved, and the component mounting assembly will move the component until the predicted point is aligned with the pressing assembly. Therefore, the force monitoring practical training teaching aid can improve the teaching efficiency while ensuring the accuracy of the measured data. 2. By the specific design of the moving structure of the second pressing assembly and the component mounting assembly, the second pressing assembly can not only detect the end face strain of the component, but also can change the distance between the first mounting part and the second mounting part by locking the second locking part, unlocking the first locking part and applying a certain pushing force to the second pressing assembly when the component is strained. 3. By the specific design of the telescopic assembly, the moving distance of the telescopic rod can be detected by the displacement sensor, instead of detecting the moving distance of the component and the distance of the component strain change by the displacement sensor, so that the measurement is more convenient and accurate. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The structure diagram of the force monitoring practical training teaching aid of the component of the embodiment of the present application is shown. Figure 2 The structure diagram of the support frame of the embodiment of the present application is shown. Figure 3 The structure diagram of the pressing assembly of the embodiment of the present application is shown. Figure 4 The structure diagram of the component mounting assembly of the embodiment of the present application is shown. Figure 5 The structure diagram of the component mounting assembly of the embodiment of the present application is shown. Figure 1 The enlarged view of A part of the structure diagram of the component mounting assembly of the embodiment of the present application is shown.

[0028] In the figure: 1-support frame, 101-slotted, 102-upper support frame, 103-lateral support frame, 104-lower support frame, 2-component installation assembly, 201-first installation piece, 202-second installation piece, 203-installation slot, 204-first sliding block, 205-second sliding block, 3-angle sensor, 4-first pressure assembly, 401-first hand wheel, 402-first screw rod, 403-first pushing piece, 5-second pressure assembly, 6-component, 7-force transmitter, 8-telescopic assembly, 801-fixed seat, 802-telescopic rod, 9-displacement sensor. DETAILED DESCRIPTION

[0029] The embodiment of the present application will be further described in detail below with reference to the accompanying drawings.

[0030] The force monitoring practical teaching aid for components in the embodiment of the present application, as shown in Figure 1 、 Figure 2 , comprises a support frame 1, the support frame 1 is divided into an upper support frame 102, a lower support frame 104 and a lateral support frame 103; a component installation assembly 2 movably arranged on the support frame 1, the component installation assembly 2 is detachably provided with a component 6, and the moving track of the component installation assembly 2 is the same as the designed track of the component 6; a pressure assembly which is arranged on the support frame 1 in a lifting manner and located at the top of the component 6; an angle sensor 3 arranged at the end of the component 6, the angle sensor 3 is used for detecting the inclination angle of the component 6.

[0031] Therefore, it can be known that, by installing the component 6 on the component installation assembly 2, the position of the component 6 is fixed and supported, and then the pressure assembly is used for pressing the predicted point on the component 6, when the component 6 is strained, the pressure point will be concave, so as to drive the end of the component 6 to be bent, therefore, the angle sensor 3 arranged at the end of the component 6 can detect the angle of the end of the component 6 being bent, and the strain condition of the component 6 is judged through the cosine theorem; when it is needed to detect the strain of multiple points of the component 6, the position of the component installation assembly 2 is only needed to be moved, the component installation assembly 2 will drive the component 6 to move until the predicted point is aligned with the pressure assembly; therefore, the force monitoring practical teaching aid can improve the teaching efficiency under the condition of ensuring that the measured data of the practical teaching aid is accurate.

[0032] Preferably, as shown in Figure 1 、 Figure 3 , a specific structure of the pressure assembly is provided: The pressure applying assembly comprises a first pressure applying assembly 4, the first pressure applying assembly 4 comprises a first screw rod 402, a first hand wheel 401 and a first pushing piece 403, the first screw rod 402 is arranged in the upper support frame 102, and the first screw rod 402 is in threaded connection with a first thread arranged in the upper support frame 102, the first hand wheel 401 is arranged at an end of the first screw rod 402 away from the component 6, and the first pushing piece 403 is arranged at an end of the first screw rod 402 close to the component 6, and the moving direction of the first pushing piece 403 is perpendicular to the side surface of the component 6.

[0033] Specifically, the first pressure applying assembly 4 is installed on the upper support frame 102 in a vertical state by assembling the first screw rod 402 of the first pressure applying assembly 4 with the first thread of the upper support frame 102, and the surface of the component 6 placed horizontally is referred to as a side surface, that is, the first screw rod 402 is perpendicular to the side surface of the component 6, when it is needed to apply pressure to a predicted point of the side surface of the component 6, the predicted point of the component 6 is first moved to be directly below the first pushing piece 403, the first hand wheel 401 is operated to rotate the first screw rod 402, so as to drive the first pushing piece 403 to move downward, and the component 6 is pressed when the first pushing piece 403 is in contact with the component 6.

[0034] It should be noted that a pressure sensor can also be arranged on the first pressure applying assembly 4, so that the value of the pressure applied to the component 6 can be directly observed.

[0035] Further, as shown in Figure 1 、 Figure 4 , a force transmitter 7 is arranged on the component 6 and is movably arranged on the component 6, a groove is arranged on the side surface of the force transmitter 7 close to the first pushing piece 403, and the first pushing piece 403 can move along the inner wall of the groove.

[0036] Specifically, the force transmitter 7 can change the point pressure applied to the component 6 by the first pressure applying assembly 4 into surface pressure, the area of the end of the force transmitter 7 is greater than the area of the end of the first pushing piece 403, so as to meet more pressure applying requirements, when it is needed to change the position of the predicted point, the first pushing piece 403 is first moved to be inside the groove of the force transmitter 7 and in contact with the bottom of the groove, that is, the first pushing piece 403 applies pressure to the bottom of the groove, and then the position of the component 6 is moved, because the first pushing piece 403 prevents the movement of the force transmitter 7, so the force transmitter 7 moves relative to the component 6 until the force transmitter 7 is directly above the next predicted point, when it is needed to apply pressure, the first pushing piece 403 applies pressure to the bottom of the groove, and the pressure is transmitted to the component 6.

[0037] Preferably, as shown in Figure 4As shown in the figure, a specific structure of a component mounting assembly 2 is provided: The component mounting assembly 2 comprises a first mounting member 201, a second mounting member 202, and a moving member, the opposite faces of the first mounting member 201 and the second mounting member 202 are provided with mounting grooves 203, one end of the component 6 is located inside the mounting groove 203 of the first mounting member 201, the other end of the component 6 is located inside the mounting groove 203 of the second mounting member 202, and the moving member is used to drive the first mounting member 201 and the second mounting member 202 to move.

[0038] Specifically, the first mounting member 201 and the second mounting member 202 are vertically mounted on the lower support frame 104, the opposite faces of the first mounting member 201 and the second mounting member 202 are provided with mounting grooves 203, the height of the mounting groove 203 is greater than the thickness of the component 6, when the component 6 is mounted, the component 6 is inserted into the mounting groove 203 in the horizontal direction, so that one end of the component 6 is arranged on one mounting groove 203, and the other end of the component 6 is arranged on the other mounting groove 203; when it is needed to change the position of the component 6, the first mounting member 201 and the second mounting member 202 are driven to move by the moving member, so that the position of the component 6 is changed; the above design facilitates the mounting and dismounting of the component 6, and can be suitable for components 6 with different lengths and thicknesses, and the design of the mounting groove 203 can provide space for the end of the component 6 to be raised upward when the component 6 is strained.

[0039] Further, referring to Figure 1 , Figure 2 , Figure 4 As shown in the figure, a specific structure of a moving member is provided: The moving member comprises a first sliding block 204, a second sliding block 205, and a driving motor, the lower support frame 104 is provided with a sliding groove 101, the driving motor is used to drive the first sliding block 204 and the second sliding block 205 to move in the sliding groove 101, the first sliding block 204 is fixedly connected with the bottom of the first mounting member 201, and the second sliding block 205 is fixedly connected with the bottom of the second mounting member 202.

[0040] Specifically, the first mounting member 201 is driven by the first sliding block 204, the second mounting member 202 is driven by the second sliding block 205, and the driving motor can separately control the first sliding block 204 and the second sliding block 205, so that the movement of the first mounting member 201 and the second mounting member 202 does not interfere with each other, for example, the first sliding block 204 and the second sliding block 205 can move relatively or be relatively stationary, so as to facilitate the mounting and movement of the component 6, and in the process of pressing, the distance between the two ends of the component 6 will be reduced, and a small amplitude movement (the distance between the first mounting member 201 and the second mounting member 202 is reduced) can prevent the component 6 from falling off the mounting groove 203.

[0041] Preferably, the pressing assembly further comprises a second pressing assembly 5, the second pressing assembly 5 comprising a second screw rod, a second hand wheel and a second pushing piece, the second screw rod being arranged in the side support frame 103 and being threadedly connected with the second thread arranged in the side support frame 103, the second screw rod being provided with the second hand wheel at the two ends away from the component 6, and the second screw rod being provided with the second pushing piece at the two ends close to the component 6, the moving direction of the second pushing piece being perpendicular to the end face of the component 6.

[0042] Specifically, the second pressing assembly 5 is arranged on the side support frame 103 in a horizontal state by assembling the second screw rod of the second pressing assembly 5 with the second thread of the side support frame 103, the face of the component 6 abutting against the mounting groove 203 is referred to as the end face, that is, the second screw rod is perpendicular to the end face of the component 6, when it is needed to press the prediction point of the end face of the component 6, the second screw rod is rotated by operating the second hand wheel, so as to drive the second pushing piece to move horizontally, when the second pushing piece contacts the first mounting piece 201, the component 6 is pressed; the above design facilitates the installation and stretching of the pressing assembly on the side of the support frame 1, and meanwhile, the force applied to the component 6 can be determined by controlling the specification of the screw rod, so as to detect the end face strain of the component 6.

[0043] It should be noted that the structure of the second pressing assembly 5 can be the same as or different from that of the first pressing assembly 4.

[0044] Further, the first sliding block 204 is provided with a first locking piece between the sliding groove 101, and the second sliding block 205 is provided with a second locking piece between the sliding groove 101.

[0045] Specifically, when the side face strain of the component 6 is detected, the second sliding block 205 is locked between the sliding groove 101 by the second locking piece, the first mounting piece 201 is applied with clamping pressure by the second pressing assembly 5, so as to realize that the component 6 is clamped between the first mounting piece 201 and the second mounting piece 202, the side face of the component 6 is continuously applied with test pressure by the first pressing assembly 4, when the component 6 is strained, the distance between the first mounting piece 201 and the second mounting piece 202 is changed, the first mounting piece 201 is driven to move close to the second mounting piece 202 by the second pressing assembly 5, so that the distance between the first mounting piece 201 and the second mounting piece 202 can be changed along with the strain of the component 6; when the end face strain of the component 6 is detected, the second sliding block 205 is locked between the sliding groove 101 by the second locking piece, the first mounting piece 201 is continuously applied with test pressure by the second pressing assembly 5, the test pressure is transmitted to the end of the component 6, so as to detect the strain of the component 6.

[0046] Preferably, the displacement sensor 9 is arranged on the first mounting piece 201, so as to realize that the moving distance of the component 6 and the distance change between the two ends of the component 6 are measured by the displacement sensor 9.

[0047] Specifically, the displacement sensor 9 facilitates observing the change of the distance between the two ends of the component 6 when the component 6 is strained, and at the same time, the position of the component 6 can be determined through the displacement sensor, so as to determine whether the first pressure applying assembly 4 is aligned with the predicted point.

[0048] Further, as shown in Figure 1 、 Figure 5 , the displacement sensor 9 and the support frame 1 are provided with a telescopic assembly 8, the telescopic assembly 8 comprises a fixed seat 801 and a telescopic rod 802, the fixed seat 801 is fixedly arranged on the support frame 1, one end of the telescopic rod 802 is telescopically arranged in the inside of the fixed seat 801, and the other end of the telescopic rod 802 is fixed on the displacement sensor 9, so as to realize measuring the moving distance of the telescopic rod 802 through the displacement sensor 9.

[0049] Specifically, through the specific design of the telescopic assembly 8, the moving distance of the telescopic rod 802 can be detected through the displacement sensor 9, instead of detecting the moving distance of the component 6 and the distance changed by the strain of the component 6 through the displacement sensor 9, so as to make the measurement more convenient and accurate.

[0050] Preferably, the stress monitoring practical training teaching aid further comprises a control terminal.

[0051] Specifically, the first pressure applying assembly 4, the second pressure applying assembly 5 and the driving motor can be controlled through the control terminal, the data collected by the angle sensor 3 and the displacement sensor 9 is transmitted to the control terminal through electric signal, and the strain data of the component 6 is obtained through the analysis of the control terminal.

[0052] The above description is merely specific embodiments of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A force monitoring training teaching aid for a component, characterized in that, It includes: Support frame (1); Component mounting assembly (2) movably arranged on the support frame (1), the component mounting assembly (2) is detachably provided with the component (6), and the moving track of the component mounting assembly (2) is the same as the designed track of the component (6); Pressure assembly is arranged on the support frame (1) and located at the top of the component (6); Angle sensor (3) is arranged at the end of the component (6), and the angle sensor (3) is used for detecting the inclination angle of the component (6).

2. The force monitoring training aid of claim 1, wherein: The pressure assembly includes a first pressure assembly (4), the first pressure assembly (4) includes a first lead screw (402), a first hand wheel (401) and a first push piece (403), the first lead screw (402) is arranged in the support frame (1), and the first lead screw (402) is threadedly connected with the first thread formed in the support frame (1), one end of the first lead screw (402) away from the component (6) is provided with the first hand wheel (401), one end of the first lead screw (402) close to the component (6) is provided with the first push piece (403), and the moving direction of the first push piece (403) is perpendicular to the side surface of the component (6).

3. The force monitoring training aid of claim 2, wherein: The component (6) is sleeved with a force transmitter (7), and the force transmitter (7) is movably arranged on the component (6), a groove is formed in one side of the force transmitter (7) close to the first push piece (403), and the first push piece (403) can move along the inner wall of the groove.

4. The force monitoring training aid of claim 1, wherein: The component mounting assembly (2) includes a first mounting piece (201), a second mounting piece (202) and a moving piece, the opposite surfaces of the first mounting piece (201) and the second mounting piece (202) are provided with mounting grooves (203), one end of the component (6) is located in the mounting groove (203) of the first mounting piece (201), the other end of the component (6) is located in the mounting groove (203) of the second mounting piece (202), and the moving piece is used for driving the first mounting piece (201) and the second mounting piece (202) to move.

5. The force monitoring training aid of claim 4, wherein: The moving piece includes a first sliding block (204), a second sliding block (205) and a driving motor, a sliding groove (101) is formed in the bottom of the support frame (1), the driving motor is used for driving the first sliding block (204) and the second sliding block (205) to move in the sliding groove (101), the first sliding block (204) is fixedly connected with the bottom of the first mounting piece (201), and the second sliding block (205) is fixedly connected with the bottom of the second mounting piece (202).

6. The force monitoring training aid of claim 5, wherein: The pressure assembly further includes a second pressure assembly (5), the second pressure assembly (5) includes a second lead screw, a second hand wheel and a second push piece, the second lead screw is arranged in the support frame (1), and the second lead screw is threadedly connected with the second thread formed in the support frame (1), the second hand wheel is arranged at two ends of the second lead screw away from the component (6), the second push piece is arranged at two ends of the second lead screw close to the component (6), and the moving direction of the second push piece is perpendicular to the end surface of the component (6).

7. The force monitoring training aid of claim 6, wherein: First locking piece is arranged between the first sliding block (204) and the sliding groove (101), and second locking piece is arranged between the second sliding block (205) and the sliding groove (101).

8. The force monitoring training aid of claim 4, wherein: The first mounting piece (201) is provided with a displacement sensor (9) to measure the moving distance of the component (6) and the distance change between the two ends when the component (6) is deformed.

9. The force monitoring training aid of claim 8, wherein: The displacement sensor (9) and the support frame (1) are provided with a telescopic assembly (8), which comprises a fixed seat (801) and a telescopic rod (802). The fixed seat (801) is fixedly arranged on the support frame (1), one end of the telescopic rod (802) is telescopically arranged in the fixed seat (801), and the other end of the telescopic rod (802) is fixed on the displacement sensor (9), so as to measure the moving distance of the telescopic rod (802) through the displacement sensor (9).

10. The force monitoring training aid of claim 1, wherein: The stress monitoring practical teaching aid further comprises a control terminal.

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