Simulation demonstration model for cable-stayed bridge

Abstract

The utility model provides a simulation demonstration model for a cable-stayed bridge. The simulation demonstration model comprises a base, a transverse ruler, a cable-stayed rope, a driving motor and a force sensor, and the transverse ruler, the inclined pull rope, the driving motor and the force sensor are supported on the base. The inclined pull rope is connected to a driving motor through a pulley block; the pulley block comprises a first pulley and a second pulley; an output shaft of the driving motor is connected with a driving pulley. And the driving motor can drive the driving pulley to rotate synchronously when rotating. When the driving pulley rotates clockwise or anticlockwise, the inclined pulling rope is wound or released around the driving pulley, so that the transverse ruler is driven to swing, and the change of pulling force is measured and represented. Therefore, the tension state change of the cable-stayed rope influenced by the dead weight of the transverse ruler in the swinging process and the tension state change of the cable-stayed rope influenced by the dead weight of the transverse ruler at different positions are dynamically simulated, the dynamic simulation of the transverse ruler for simulating the main beam of the cable-stayed bridge is realized, and the cable-stayed state and the dynamic change process of the cable-stayed rope on the main beam are simulated.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching simulation instrument equipment technical field, and specifically relates to a cable-stayed bridge simulation demonstration model. BACKGROUND

[0002] Cable-stayed bridge is a typical bridge structure, mainly by the main girder, bridge tower and cable three parts, the main girder is directly pulled on the bridge tower with cable to build bridge. The main girder is the main structural part of bearing vehicle load, and its form is various, there are steel box girder, concrete box girder etc. The bridge tower is the important support structure of cable-stayed bridge, and it is generally high and towering at the both ends or middle of bridge, and the material often uses reinforced concrete or steel. The cable is the key component connecting the bridge tower and the main girder, and it is radially or harp-shaped etc. various arrangement forms, and it transmits the load of the main girder to the bridge tower.

[0003] At present, in the teaching research and popular science demonstration activities of cable-stayed bridge design and construction, the structure model of equal proportion is reduced, and is made by wood, plastic, metal etc. material, for example, the outer shell of the main girder and the bridge tower is made of plastic, and the internal metal skeleton is used to enhance the structural strength, and the cable uses high-strength steel wire or nylon rope etc. according to certain proportion to accurately measure and reduce the cable-stayed bridge, and then the corresponding material is used to finely process and fixedly assemble into the structure model, which more realistically and intuitively displays the real structure mode and form of the cable-stayed bridge, including the overall appearance, structural details and the connecting relationship between each part of the cable-stayed bridge, which helps to have more clear understanding of the spatial form and structure of the cable-stayed bridge, but the structure of bonding and fixing cannot carry out dynamic simulation and demonstration, for example, the dynamic demonstration of the change of the bridge main girder, dynamic load etc. still has certain limitation for the dynamic demonstration of the principle and mechanical property of the cable-stayed bridge. UTILITY MODEL CONTENTS

[0004] In view of the defects and deficiencies of the prior art, the utility model aims at providing a cable-stayed bridge simulation demonstration model, which comprises a base, a horizontal ruler, a cable, a driving motor and a force sensor.

[0005] The upper surface of the base is fixed with an upward extending vertical rod;

[0006] The horizontal ruler is rotatably connected to the vertical rod at one end, and a first hook is arranged on the horizontal ruler, the first hook is connected to the end of the cable and can be pulled by the cable, so that the horizontal ruler makes a swing motion around the mounting position of the horizontal ruler in space;

[0007] The cable is connected to the output end of the driving motor through a pulley block, and the pulley block comprises a first pulley arranged at the top of the vertical rod and a second pulley arranged at the bottom of the vertical rod;

[0008] The driving motor output shaft is connected with a driving pulley, and the rotating movement of the driving motor drives the driving pulley to rotate synchronously.

[0009] The inclined cable extends from the first hook, passes the first pulley and the second pulley in sequence, further extends to the driving pulley, and can be wound or released around the driving pulley when the driving pulley rotates clockwise or counterclockwise.

[0010] The second pulley is further connected with a force sensor for detecting the force borne by the second pulley in real time to represent the tension of the inclined cable and dynamically simulate the tension state change of the inclined cable affected by the self weight of the horizontal ruler.

[0011] The fixed connection point of the inclined cable from the first hook, the position of passing the first pulley, and the position of passing the second pulley are all located in the same plane.

[0012] As an optional embodiment, the first end of the inclined cable is fixed to the driving pulley and can be wound or released around the driving pulley.

[0013] As an optional embodiment, the driving motor is installed on the vertical rod through a motor mounting frame and is located below the installation position of the horizontal ruler.

[0014] With respect to the installation position of the horizontal ruler, the second pulley and the driving motor are located on the same side and below the horizontal ruler, and the first pulley is located above the horizontal ruler.

[0015] As an optional embodiment, in the vertical direction along the vertical rod, the driving pulley is closer to the horizontal ruler than the second pulley.

[0016] As an optional embodiment, the upper surface of the horizontal ruler is formed with a first sliding groove along the longitudinal direction of the horizontal ruler, and the first hook is fitted and installed in the first sliding groove.

[0017] As an optional embodiment, the horizontal ruler is provided with at least one level bubble for indicating the horizontal state of the horizontal ruler and representing whether the horizontal ruler is in a horizontal state during dynamic simulation of the horizontal ruler deflection movement.

[0018] As an optional embodiment, the surface of the horizontal ruler is further provided with a scale line and a scale value for visually representing the moving position of the first hook.

[0019] As an optional embodiment, the horizontal ruler is installed on the vertical rod through a perforated fixing block.

[0020] As an optional embodiment, the perforated fixing block is sleeved on the vertical rod, the first knob passes through the horizontal ruler and the side wall of the perforated fixing block, and is screwed into the perforated fixing block and abuts against the vertical rod to be tightened, so that the position of the perforated fixing block on the vertical rod is fixed.

[0021] As an optional embodiment, the head of the first knob is provided with threads, which are matched with the threaded holes in the side wall of the perforated fixing block to be screwed.

[0022] The waist of the first knob is a smooth surface, so that the horizontal ruler can rotate freely around the waist.

[0023] As an optional embodiment, the tension data detected by the force sensor can be output in a wired or wireless manner.

[0024] As an optional embodiment, when the driving pulley rotates to tighten the cable-stayed rope, the cable-stayed rope is pulled to be wound on the driving pulley in sequence through the first pulley and the second pulley, and the horizontal ruler is pulled to swing in the lifting direction.

[0025] As an optional embodiment, when the driving pulley rotates to release the cable-stayed rope, the cable-stayed rope wound on the driving pulley is released in sequence through the second pulley and the first pulley to the direction of the first hook on the horizontal ruler, so as to drive the horizontal ruler to swing in the descending direction.

[0026] As an optional embodiment, the cable-stayed bridge simulation demonstration model is further provided with a control system connected with the driving motor, which is used for controlling the operation of the driving motor.

[0027] As an optional embodiment, the cable-stayed bridge simulation demonstration model is further provided with a display device in data communication with the force sensor, which is used for displaying the measured force data and / or the change of the force.

[0028] It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be seen as being part of the inventive subject matter for the present disclosure provided that such concepts are not mutually inconsistent in which case such inconsistent concepts but would be excluded from the inventive subject matter. Additionally, all combinations of claimed subject matter can be seen as being part of the inventive subject matter for the present disclosure.

[0029] The foregoing and other aspects, embodiments and features of the present inventive teachings can be understood and appreciated more fully by reference to the following description in conjunction with the accompanying drawings. Other aspects, embodiments and features of the present inventive teachings will become apparent from the description that follows. The description is made in connection with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures can be represented by a like numeral. For purposes of clarity, not every component can be called out in every drawing. There will now be described, by way of example, embodiments of various aspects of the application.

[0031] Figure 1 is a perspective view of a cable-stayed bridge simulation demonstration model according to an embodiment of the application.

[0032] Figure 2 is a perspective view of a cable-stayed bridge simulation demonstration model from another angle according to an embodiment of the application.

[0033] Figure 3 is a perspective view of a crossbar of a cable-stayed bridge simulation demonstration model according to an embodiment of the application.

[0034] Figure 4 is a perspective view of a crossbar mounting structure of a cable-stayed bridge simulation demonstration model according to an embodiment of the application.

[0035] Figure 5 is a front view of a cable-stayed bridge simulation demonstration model according to an embodiment of the application (control system 1000 not labeled).

[0036] Figure 6 is a dynamic change schematic diagram of a cable-stayed position of a cable-stayed bridge simulation demonstration model according to an embodiment of the application (control system 1000 not labeled).

[0037] Figure 7 is an assembly relationship diagram of a cable-stayed bridge simulation demonstration model according to an embodiment of the application (control system 1000 not labeled).

[0038] Figure 8 is a perspective view of a cable-stayed bridge simulation demonstration model according to an embodiment of the application. Figure 7 is a partial enlarged schematic view of position A of the cable-stayed bridge simulation demonstration model in the example.

[0039] Figure 9 is a clamping mechanism assembly schematic diagram of a cable-stayed bridge simulation demonstration model according to an embodiment of the application (control system 1000 not labeled).

[0040] Figure 10 is a perspective view of a cable-stayed bridge simulation demonstration model according to an embodiment of the application. Figure 9 is a partial enlarged schematic view of position B of the cable-stayed bridge simulation demonstration model in the example.

[0041] Figure 11 is a perspective view of a cable-stayed bridge simulation demonstration model according to an embodiment of the application. Figure 9 is a partial enlarged schematic view of position C of the cable-stayed bridge simulation demonstration model in the example. DETAILED DESCRIPTION

[0042] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0043] Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments disclosed herein are not necessarily intended to include all aspects of the present invention. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed herein are not limited to any particular implementation. Furthermore, some aspects of the present invention can be used alone or in any suitable combination with other aspects disclosed herein.

[0044] {Example 1}

[0045] Combination Figures 1-11 As shown, the cable-stayed bridge simulation demonstration model according to an embodiment of the present invention includes a base 100, a horizontal ruler 200, a cable stay rope 300, a drive motor 400, a force sensor 500, and a control system 1000.

[0046] The base 100 serves as the bottom support mechanism, used to support the entire cable-stayed bridge simulation demonstration model. As shown in the figure, the horizontal ruler 200, cable stays 300, drive motor 400, and force sensor 500 are supported on the base 100.

[0047] An upwardly extending upright post 110 is fixed to the upper surface of the base 100.

[0048] One end of the horizontal ruler 200 is rotatably mounted to the vertical pole 110.

[0049] Combination Figure 1 , Figure 2 As shown, a first hook 220 is provided on the horizontal ruler. The first hook 220 is connected to the end of the inclined rope 300 and can be pulled by the inclined rope 300, so that the horizontal ruler 200 swings around its installation position in space.

[0050] Combination Figure 1 The inclined cable 300 is designed to be connected to the output end of the drive motor 400 via a pulley system. The pulley system includes a first pulley 410 located at the top of the upright 110 and a second pulley 420 located at the bottom of the upright 110.

[0051] The drive motor 400 is mounted on the upright 110 via the motor mounting bracket 401 and is located below the mounting position of the crossbar 200.

[0052] With reference to the installation position of the horizontal ruler 200, the second pulley 420 and the driving motor 400 are located on the same side and below the horizontal ruler 200, and the first pulley 410 is located above the horizontal ruler 200.

[0053] As shown in Figure 2 , Figure 7 , Figure 8 The motor mounting frame 401 is fixedly connected with a fixing block 402, the fixing block 402 is sleeved on the vertical rod 110 and is fastened by bolts to be fixed in position.

[0054] The output shaft of the driving motor 400 is connected with a driving pulley 430, and when the driving motor 400 rotates, the driving pulley 430 can be driven to rotate synchronously.

[0055] As shown in Figure 2 , Figure 7 , Figure 8 In the vertical direction along the vertical rod 110, the driving pulley 430 is closer to the horizontal ruler 200 than the second pulley 420, i.e. the driving pulley 430 is located between the second pulley 420 and the horizontal ruler 200 in the vertical direction.

[0056] As shown in Figure 1 , Figure 2 , Figure 7 The end of the diagonal cable 300 is connected to the horizontal ruler 200, in particular by being fastened to a first hook provided on the horizontal ruler 200.

[0057] As shown in Figure 1 , Figure 3 , Figure 4 The upper surface of the horizontal ruler 200 is formed with a first sliding groove 210 along the length of the horizontal ruler, and a first hook 220 capable of sliding is fitted and mounted in the first sliding groove 210. The end of the diagonal cable 300 is fastened to the first hook 220 to form a fixed connection relationship.

[0058] As shown in Figure 1 , Figure 2 , Figure 7 , Figure 8 The diagonal cable 300 extends from the first hook 220, passes through the first pulley 410 and the second pulley 420 in sequence, and then extends upward to the driving pulley 430, and can be wound or released around the driving pulley 430 when the driving pulley 430 rotates clockwise or counterclockwise.

[0059] In a further optional embodiment, the first end of the diagonal cable 300 is fixed to the driving pulley 430 and wound or released around the driving direction of the driving pulley 430 relative to the end of the diagonal cable 300.

[0060] As shown inFigure 1 , Figure 2 , Figure 8 As shown, when the drive pulley 430 rotates and the inclined rope 300 is tightened, the inclined rope 300 is pulled to pass through the first pulley 410 and the second pulley 420 in sequence and wrap around the drive pulley 430, pulling the horizontal ruler 200 to swing in the lifting direction.

[0061] Similarly, when the drive pulley 430 rotates, causing the inclined rope 300 to release, the inclined rope 300 wound around the drive pulley 430 successively passes over the second pulley 420 and the first pulley 410 and is released towards the first hook 200 on the horizontal ruler, thereby causing the horizontal ruler 200 to swing downwards. This dynamically simulates the change in the tension state of the inclined rope under the influence of the horizontal ruler's own weight during the swing.

[0062] In other embodiments, combined with Figure 5 , Figure 6 As shown, the first hook 220 can slide to different positions within the first groove 210, thereby simulating the change in tension state of the inclined rope under the influence of the weight of the horizontal ruler at different positions.

[0063] This enables the dynamic simulation of the horizontal ruler used to simulate the main girder of a cable-stayed bridge, simulating the cable stays' tension on the main girder and their dynamic changes.

[0064] Combination Figure 1 , Figure 3 As shown, at least one level bubble 230 is provided on the horizontal ruler 200 to indicate the horizontal state of the horizontal ruler. In the process of dynamically simulating the swing motion of the horizontal ruler, the level bubble can intuitively represent whether the horizontal ruler is in a horizontal state, which is beneficial for observation.

[0065] Combination Figure 1 , Figure 3 As shown, the surface of the ruler 200 is also provided with scale lines and scale values ​​for visualization, which makes it easy to observe the movement position of the first hook in the dynamic simulation process and facilitates torque research and calculation.

[0066] As an optional embodiment, the horizontal ruler 200 is mounted to the vertical pole 110 via a perforated fixing block 201. Combined with... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the perforated fixing block 201 is fitted onto the upright 110. The first knob 202 passes through the horizontal ruler 200 and the side wall of the perforated fixing block 201, thereby screwing into the perforated fixing block 201 and pressing against the upright 110 to tighten it, thus fixing the position of the perforated fixing block 201 on the upright 201.

[0067] In the present embodiment, the head of the first knob 202 is provided with a thread to be screwed with the threaded hole on the sidewall of the through-hole fixing block 201. The waist of the first knob 202 is a smooth surface, so that the cross ruler 200 can rotate freely around it.

[0068] In combination Figure 1 , Figure 2 , Figure 8 As an optional embodiment, the first pulley 410 is fixed to the top of the vertical rod 110 by the first clamping mechanism 120. The second pulley 420 is fixed to the bottom of the vertical rod 110 by the second clamping mechanism 130.

[0069] A force sensor 500 is also provided on the second clamping mechanism 130, which is installed below and connected to the second pulley 420, so that the force sensor 500 can detect the force on the second pulley 420 in real time, which represents the tension of the cable-stayed rope 300, so as to dynamically simulate the tension of the cable-stayed rope 300 under the influence of the weight of the cross ruler in different positions and different states.

[0070] As an optional embodiment, the data of the force measured by the force sensor 500 can be output through wired or wireless transmission.

[0071] As an optional embodiment, the control system 1000 of the cable-stayed bridge simulation demonstration model is electrically connected to the driving motor through a control cable, which is used to control the operation of the driving motor 400, including start / stop / forward / reverse and other operations.

[0072] The control system 1000 can also be connected to the force sensor 500 through a cable to receive the detected tension data transmitted by the force sensor 500, and to visualize the data through a display device, so that the value and change of the force can be observed intuitively during the dynamic demonstration of the cable-stayed bridge simulation demonstration model.

[0073] As an optional embodiment, the detected tension data can also be analyzed in time sequence to draw a force-time curve, so that the value and trend of the force can be observed intuitively.

[0074] As an optional embodiment, the aforementioned control system 1000 is designed in the form of an upper computer, such as a computer system with data communication, data processing and display functions, including desktop computers, notebook computers, palm computers, smart computing terminals, embedded computer systems, etc.

[0075] As an optional embodiment, the aforementioned control system 1000 can also be designed in the form of a control box, which is installed on the upper surface of the base 100, as shown in Figure 1 、 Figure 2 ​

[0076] In combination Figure 1 , Figure 2 As shown in FIG. 10, the control box is provided with at least a power input port, a signal input port, a control button 1002 and a display device 1003. The display device 1003 can be a digital tube, an LED or an LCD display to display the measured force value. The power input port is connected with an external power supply to supply power to the control box. The signal input port establishes a data communication channel with the force sensor 500 through a cable or a wireless transmission link to receive the sensing data of the force sensor 500 and display the detected force value on the display device 1003.

[0077] In the example shown in FIG. 11, the power input port and the signal input port are integrated into one input port 1101, and the power cable and the signal cable are inserted into the control box through one physical input port. Figure 2

[0078] It should be understood that the driving motor 400 can be powered by an independent power supply circuit or by the control box.

[0079] {Example 2}

[0080] In combination Figure 2 , Figure 6 , Figure 7 , Figure 8 As shown in FIG. 2, the first pulley 410 has a rotation axis in a direction perpendicular to the x direction, and the second pulley 420 has a rotation axis in a direction perpendicular to the x direction.

[0081] In combination Figure 8 As shown in FIG. 2, the rotation axis of the first pulley 410 is parallel to the rotation axis of the second pulley 420, and the first pulley 410, the second pulley 420 and the cross bar 200 are located on the same side of the vertical bar 110.

[0082] In combination Figure 8 As shown in FIG. 2, the driving pulley 430 has a rotation axis in a direction parallel to the x direction.

[0083] The distance d1 between the first pulley 410 and the center line of the vertical bar 110 along the x direction, and the distance d2 between the second pulley 420 and the center line of the vertical bar 110 along the x direction satisfy: d1 = d2.

[0084] The distance d3 between the first pulley 410 and the center line of the vertical bar 110 along the y direction, and the distance d4 between the second pulley 420 and the center line of the vertical bar 110 along the y direction satisfy: d3 = d4.

[0085] ​Thus, the fixed connection point of the first hook, the position around the first pulley 410, and the position around the second pulley 420 of the stay rope 300 are all located in the same plane.

[0086] As shown in Figure 8 As shown in

[0087] As shown in Figure 2 , Figure 8 As shown in

[0088] {Example 3}

[0089] As shown in Figure 1 , Figure 2 , Figure 8 , Figures 9-11 As shown in Figure 10 As shown in

[0090] As shown in Figure 10 As shown in an example, the first clamping mechanism 120 includes a clamping body 121 sleeved to the outer surface of the vertical rod 110. The clamping body 121 is provided with a first clamping knob 123 and a second clamping knob 124 opposite to each other in the direction of the pair of opposite sides of the vertical rod 110, and can be respectively tightened and released.

[0091] At least one corner anti-slip piece 122 is provided between the clamping body 121 and the vertical rod 110, as shown in Figure 10 The corner anti-slip piece 122 is designed as an L-shaped structure and is located on the side of the second clamping knob 124 to hold the vertical rod 110.

[0092] As shown in Figure 10 The clamping body 121 on the side of the second clamping knob 124 is further provided with an L-shaped anti-rotation piece 125 to hold the pulley mounting shaft 126. After the second clamping knob 124 passes through the pulley mounting shaft 126 and the L-shaped anti-rotation piece 125, the clamping body 121 is further tightened until it abuts against the corner anti-slip piece 122. By tightening the first clamping knob 123 and the second clamping knob 124 on both sides, clamping and fixing are achieved.

[0093] As shown in the figure, the first pulley 410 is installed at the end of the pulley mounting shaft 126 of the first clamping mechanism 120.

[0094] As shown in Figure 11As shown, the end of the pulley mounting shaft 126 of the second clamping mechanism 130 is arranged in a horizontal shape for stably mounting the force sensor 500.

[0095] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model. Those skilled in the art to which the utility model belongs can make various changes and decorations without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the definition of the claims.

Claims

1. A simulation demonstration model of a cable-stayed bridge, characterized in that, The device comprises a base, a horizontal ruler, a cable, a driving motor and a force sensor. An upward extending vertical rod is fixed on the upper surface of the base. One end of the horizontal ruler is rotatably connected with the vertical rod, and a first hook is arranged on the horizontal ruler. The end of the cable is connected with the first hook and can be pulled by the cable, so that the horizontal ruler makes a swing movement around the installation position of the horizontal ruler. The cable is connected with the output end of the driving motor through a pulley block. The pulley block comprises a first pulley arranged at the top of the vertical rod and a second pulley arranged at the bottom of the vertical rod. The output shaft of the driving motor is connected with a driving pulley. The rotation of the driving motor drives the driving pulley to rotate synchronously.

2. The cable-stayed bridge simulation demonstration model according to claim 1, characterized in that, The cable extends from the first hook, passes through the first pulley and the second pulley, and then extends to the driving pulley.

3. The cable-stayed bridge simulation demonstration model according to claim 1, characterized in that, When the driving pulley rotates clockwise or counterclockwise, the cable is wound or released around the driving pulley. The second pulley is further connected with a force sensor for detecting the force acting on the second pulley to represent the tension of the cable.

4. The cable-stayed bridge simulation demonstration model according to claim 3, characterized in that, The fixed connection point of the cable from the first hook, the position of the cable passing through the first pulley and the position of the cable passing through the second pulley are located in the same plane.

5. The cable-stayed bridge simulation demonstration model according to claim 1, characterized in that, The first end of the cable is fixed with the driving pulley and can be wound or released around the driving pulley.

6. The cable-stayed bridge simulation demonstration model according to claim 1, characterized in that, The driving motor is installed on the vertical rod through a motor mounting frame and is located below the installation position of the horizontal ruler.

7. The cable-stayed bridge simulation demonstration model according to claim 1, characterized in that, The second pulley and the driving motor are located on the same side of the installation position of the horizontal ruler and below the horizontal ruler.

8. The cable-stayed bridge simulation demonstration model according to claim 1, characterized in that, The first pulley is located above the horizontal ruler.

9. The cable-stayed bridge simulation demonstration model according to claim 8, characterized in that, In the vertical direction of the vertical rod, the driving pulley is closer to the horizontal ruler than the second pulley.

10. The cable-stayed bridge simulation demonstration model according to claim 9, characterized in that, The upper surface of the horizontal ruler is formed with a first sliding groove along the longitudinal direction of the horizontal ruler. The first hook is adapted to be installed in the first sliding groove and can slide in the first sliding groove.

11. The cable-stayed bridge simulation demonstration model according to claim 1, characterized in that, At least one level bubble is arranged on the horizontal ruler to indicate the horizontal state of the horizontal ruler.

12. The cable-stayed bridge simulation demonstration model according to any one of claims 1-11, characterized in that, Scale lines and scale values are arranged on the surface of the horizontal ruler to visually represent the moving position of the first hook. The horizontal ruler is installed on the vertical rod through a perforated fixing block. The perforated fixing block is sleeved on the vertical rod, and a first knob penetrates through the horizontal ruler and the side wall of the perforated fixing block, so as to be screwed into the perforated fixing block and abut against the vertical rod to be tightened, so that the position of the perforated fixing block on the vertical rod is fixed. The head of the first knob is provided with threads for cooperation with the threaded hole on the side wall of the perforated fixing block. The waist of the first knob is a smooth surface, so that the horizontal ruler can rotate freely. The tension data detected by the force sensor can be output through wired or wireless transmission. When the driving pulley rotates and the cable is wound, the cable is pulled to pass through the first pulley and the second pulley and is wound on the driving pulley, and the horizontal ruler is pulled to swing in the lifting direction.

13. The cable-stayed bridge simulation demonstration model according to any one of claims 1-11, characterized in that, When the driving pulley rotates to release the cable, the cable wound on the driving pulley is released in turn to pass the second pulley and the first pulley and to the direction of the first hook on the horizontal ruler, thereby driving the horizontal ruler to swing in the descending direction.

14. The cable-stayed bridge simulation demonstration model according to any one of claims 1-11, characterized in that, The cable-stayed bridge simulation demonstration model is further provided with a control system connected with the driving motor, which is used for controlling the operation of the driving motor.

15. The cable-stayed bridge simulation demonstration model according to any one of claims 1-11, characterized in that, The cable-stayed bridge simulation demonstration model is further provided with a display device in data communication with the force sensor, which is used for displaying the measured force data and / or the force change.

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