阅读说明：本技术 一种计算机控制的高可靠性舞台升降系统 (High-reliability stage lifting system controlled by computer ) 是由 李彩霞 甄华 邱俊玲 于 2021-07-02 设计创作，主要内容包括：本发明涉及一种计算机控制的高可靠性舞台升降系统,包括设置于地坑的立柱、沿立柱升降的升降台和用于控制升降台升降的控制系统,所述升降台下部四角处均设置有驱动机构,所述驱动机构驱使升降台沿立柱纵向运动,驱动机构包括转轴、主电机和从电机,所述主电机和从电机均与转轴传动连接,主电机和从电机之间设置有互锁机构,所述控制系统包括控制台、CPU模块、电源模块、通讯模块和同步模块,所述控制台、CPU模块、电源模块和通讯模块均为平行设置的两组,所述同步模块用于两个CPU模块之间的通讯。本发明的目的在于解决或至少减轻目前舞台可靠性较低的问题,提供一种计算机控制的高可靠性舞台升降系统。(The invention relates to a computer-controlled high-reliability stage lifting system which comprises an upright post arranged in a pit, a lifting platform lifting along the upright post and a control system for controlling the lifting of the lifting platform, wherein driving mechanisms are arranged at four corners of the lower part of the lifting platform and drive the lifting platform to move longitudinally along the upright post, each driving mechanism comprises a rotating shaft, a main motor and a slave motor, the main motor and the slave motors are in transmission connection with the rotating shafts, an interlocking mechanism is arranged between the main motor and the slave motors, the control system comprises a control platform, a CPU (Central processing Unit) module, a power supply module, a communication module and a synchronization module, the control platform, the CPU module, the power supply module and the communication module are arranged in two groups in parallel, and the synchronization module is used for communication between the two CPU modules. The invention aims to solve or at least reduce the problem of low reliability of the existing stage and provides a high-reliability stage lifting system controlled by a computer.)

1. A high-reliability stage lifting system controlled by a computer is characterized by comprising an upright post (1) arranged in a pit, a lifting platform (2) lifted along the upright post (1) and a control system for controlling the lifting platform (2) to lift;

wherein the upright posts (1) are vertically arranged at four corners of the pit;

the four corners of the lower part of the lifting platform (2) are respectively provided with a driving mechanism (3), the driving mechanisms (3) drive the lifting platform (2) to move longitudinally along the upright post (1), each driving mechanism (3) comprises a rotating shaft (11), a main motor (12) and a slave motor (13), the main motor (12) and the slave motor (13) are in transmission connection with the rotating shaft (11), an interlocking mechanism is arranged between the main motor (12) and the slave motor (13), and one of the main motor (12) and the slave motor (13) is in transmission connection with the rotating shaft (11) at the same time through the interlocking mechanism;

the control system comprises a console, a CPU module, a power module, a communication module and a synchronization module, wherein the console, the CPU module, the power module and the communication module are arranged in two groups in parallel, and the synchronization module is used for communication between the two CPU modules;

the control system is configured to: the control console is in a two-machine-standby thermal working mode, and the two groups of control consoles are used for independently configuring, monitoring and managing the stage; the two groups of CPU modules run and monitor in real time in parallel on line, use the same program and receive the same data block, process mapping and internal data; the two groups of power supply modules simultaneously supply power to all the electric equipment.

2. A stage lifting system with high reliability controlled by a computer as claimed in claim 1, wherein the lifting platform (2) comprises a frame body (4) and a table top (5), the table top (5) is fixedly designed on the top of the frame body (4), a display device (19) is laid on the table top (5) in an array manner, the display device (19) comprises a display screen (20), and the display screen (20) is connected to the power supply module.

3. A stage lifting system with high reliability controlled by a computer as claimed in claim 2, wherein the column (1) comprises a column body (6), a stay bar (7), a positioning plate (8), a first conductive plate (9) and a hydraulic bag (10), the cross section of the column body (6) is C-shaped, the stay bar (7) is horizontally and fixedly arranged at the opening of the column body (6), the stay bars (7) are equidistantly arranged along the height direction of the column body (6), the positioning plate (8) is flat-shaped, the positioning plate (8) is vertically arranged in the column body (6) and transversely slides along two sides of the column body (6), the first conductive plate (9) is long-shaped, the first conductive plate (9) is fixedly arranged at one side of the positioning plate (8) close to the stay bar (7) along the length direction of the positioning plate (8), and the first conductive plates (9) are arranged at intervals, the hydraulic bag (10) is positioned in the column body (6) and between one end, far away from the opening, of the column body (6) and the positioning plate (8), and the hydraulic bag (10) is communicated to the hydraulic machine;

the cylinder (6), the support rod (7) and the positioning plate (8) are made of insulating materials, and the first conductive plate (9) is made of conductive materials and connected to the power supply module.

4. A stage lifting system with high reliability controlled by a computer as claimed in claim 3, wherein the driving mechanism (3) further comprises a plurality of rotating plates (14) and a plurality of second conductive plates (15), the plurality of rotating plates (14) are arranged along the outer wall of the circumference of the rotating shaft (11) in a uniform circumferential array, the plurality of rotating plates (14) of the rotating shaft (11) are engaged with the plurality of support rods (7) of the upright (1), the second conductive plates (15) are fixedly arranged at the outer side of one end of the rotating plates (14) far away from the rotating shaft (11), and the number of the second conductive plates (15) is equal to that of the first conductive plates (9) and the second conductive plates are arranged in a one-to-one correspondence;

the rotating shaft (11) and the rotating plate (14) are made of insulating materials, and the second conducting plate (15) is made of conducting materials and is connected to the display screen (20).

5. The stage lifting system controlled by a computer according to claim 4, wherein a conductive section is arranged at one end of the rotating shaft (11) close to the master motor (12) and the slave motor (13), the conductive section is provided with a plurality of conductive posts (16) in a radial sliding manner, a first spring for driving the conductive posts (16) to move away from the conductive section is arranged between the conductive posts (16) and the conductive section, the conductive section is rotatably sleeved on the conductive sleeve (17), the conductive sleeve (17) is fixedly arranged on the frame body (4), a plurality of conductive rings (18) are arranged on the inner circumferential wall of the conductive sleeve (17), one end of each conductive post (16) is connected to the second conductive plate (15), the other end of each conductive ring abuts against the conductive ring (18), and the conductive rings (18) are connected to the display screen (20);

the conductive sleeve (17) is made of an insulating material, and the conductive column (16) and the conductive ring (18) are made of conductive materials.

6. A stage lifting system with high reliability controlled by a computer as claimed in claim 2, wherein the display device (19) further comprises a mounting base (21) and a metal rubber block (22), the mounting base (21) comprises an upper mounting section and a lower positioning section, the positioning section is connected to the frame body (4), and the display screen (20) and the metal rubber block (22) are respectively embedded in the mounting section and the positioning section.

7. A stage lifting system with high reliability controlled by a computer as claimed in claim 6, wherein circular heat dissipation holes are provided between the mounting section and the positioning section, a heat dissipation plate (23) is provided at the lower part of the display screen (20), the heat dissipation plate (23) is ring-shaped, a plurality of heat dissipation plates (23) are coaxially arranged at intervals, and the heat dissipation plates (23) pass through the heat dissipation holes and face the table top (5).

8. The stage lifting system as recited in claim 7, wherein the metal rubber block (22) is formed by winding a shape memory alloy wire into a fine spiral coil, the metal rubber block (22) is ring-shaped, a longitudinal section of the metal rubber block (22) is in an isosceles trapezoid shape with a narrow top and a wide bottom, an outer circumferential side of the metal rubber block (22) is attached to the mounting base (21), an inner circumferential side of the metal rubber block is attached to the outermost heat dissipation plate (23), and a bottom surface of the metal rubber block (22) extends out of a bottom surface of the mounting base (21).

9. A computer-controlled high-reliability stage lifting system according to claim 7, wherein the four corners of the lower surface of the mounting base (21) are vertically provided with mounting rods (24), the mounting rods (24) pass through the table top (5) and are sleeved with second springs (25) and positioning nuts (26), the second springs (25) and the positioning nuts (26) are both located below the table top (5), the second springs (25) are slidably sleeved on the mounting rods (24), the upper ends and the lower ends of the second springs (25) respectively abut against the table top (5) and the positioning nuts (26), and the positioning nuts (26) are screwed on the mounting rods (24).

Technical Field

The invention relates to the technical field of stage control, in particular to a computer-controlled high-reliability stage lifting system.

Background

The stage lifting platform moves frequently in the performance process, and the response speed and the accuracy of the movement directly influence the performance effect, so that the control system of the stage lifting platform is required to be accurate and reliable. At present, a great number of high and new technical achievements, such as a sensing feedback technology, a projection technology, a DCS technology and the like, are mostly applied to the stage, the stage changes are rich and colorful, and the stage art is more perfect and vivid.

However, the reliability is reduced, especially for the stage with lifting function, when the stage is broken down, the performers will not only affect the performance, but also cause personal injury.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, solve or at least alleviate the problem of low reliability of the existing stage, and provide a computer-controlled high-reliability stage lifting system.

The invention is realized by the following technical scheme:

a high-reliability stage lifting system controlled by a computer comprises an upright post arranged in a pit, a lifting platform lifting along the upright post and a control system for controlling the lifting of the lifting platform;

the upright posts are vertically arranged at four corners of the pit;

the four corners of the lower part of the lifting platform are respectively provided with a driving mechanism, the driving mechanisms drive the lifting platform to move longitudinally along the upright post, each driving mechanism comprises a rotating shaft, a main motor and an auxiliary motor, the main motor and the auxiliary motors are in transmission connection with the rotating shaft, an interlocking mechanism is arranged between the main motor and the auxiliary motors, and one of the main motor and the auxiliary motor is in transmission connection with the rotating shaft at the same time through the interlocking mechanism;

the control system comprises a console, a CPU module, a power module, a communication module and a synchronization module, wherein the console, the CPU module, the power module and the communication module are arranged in two groups in parallel, and the synchronization module is used for communication between the two CPU modules;

the control system is configured to: the control console is in a two-machine-standby thermal working mode, and the two groups of control consoles are used for independently configuring, monitoring and managing the stage; the two groups of CPU modules run and monitor in real time in parallel on line, use the same program and receive the same data block, process mapping and internal data; the two groups of power supply modules simultaneously supply power to all the electric equipment.

In order to further implement the present invention, the following technical solutions may be preferably selected:

preferably, the elevating platform includes support body and mesa, mesa fixed design in the support body top, display device has been laid to mesa upper surface array, display device includes the display screen, the display screen is connected to power module.

Preferably, the upright column comprises a column body, support rods, a positioning plate, a first current-conducting plate and a hydraulic bag, the cross section of the column body is C-shaped, the support rods are horizontally and fixedly arranged at the opening of the column body, the support rods are arranged at equal intervals along the height direction of the column body, the positioning plate is flat, the positioning plate is vertically arranged in the column body and transversely slides along two sides of the column body, the first current-conducting plate is in a long strip shape, the first current-conducting plate is fixedly arranged on one side, close to the support rods, of the positioning plate along the length direction of the positioning plate, the first current-conducting plates are arranged at intervals, the hydraulic bag is positioned in the column body and positioned between one end, far away from the opening, of the column body and the positioning plate, and the hydraulic bag is communicated to the hydraulic machine;

the cylinder, the stay bar and the positioning plate are all made of insulating materials, and the first conducting plate is made of conducting materials and is connected to the power supply module.

Preferably, the driving mechanism further comprises a rotating plate and a second conductive plate, the rotating plates are uniformly arranged in a circumferential array along the circumferential outer wall of the rotating shaft, the rotating plates of the rotating shaft are meshed with the support rods of the upright post, the second conductive plate is fixedly arranged on the outer side of one end, away from the rotating shaft, of the rotating plate, and the second conductive plate and the first conductive plate are equal in number and are arranged in a one-to-one correspondence manner;

the rotating shaft and the rotating plate are made of insulating materials, and the second conducting plate is made of conducting materials and connected to the display screen.

Preferably, one end of the rotating shaft, which is close to the main motor and the end of the rotating shaft, are provided with conductive sections, the conductive sections are provided with a plurality of conductive columns in a radial sliding manner, a first spring for driving the conductive columns to move away from the conductive sections is arranged between the conductive columns and the conductive sections, the conductive sections are rotatably sleeved on the conductive sleeves, the conductive sleeves are fixedly arranged on the frame body, the circumferential inner wall of the conductive sleeves is provided with a plurality of conductive rings, one end of each conductive column is connected to a second conductive plate, the other end of each conductive column is abutted to the corresponding conductive ring, and the conductive rings are connected to the display screen;

the conductive sleeve is made of an insulating material, and the conductive column and the conductive ring are made of conductive materials.

Preferably, display device still includes mount pad and metal rubber piece, the mount pad includes the installation section on upper portion and the location section of lower part, and the location section is connected to the support body, display screen and metal rubber piece are inlayed respectively in the installation section and in the location section.

Preferably, be provided with circular shape louvre between installation section and the location section, the display screen lower part is provided with the heating panel, the heating panel is the annular, and the coaxial interval of a plurality of heating panel sets up, and the heating panel passes the louvre towards the mesa.

Preferably, the metal rubber block is formed by weaving a fine spiral coil formed by winding a shape memory alloy wire, the metal rubber block is annular, the longitudinal section of the metal rubber block is in an isosceles trapezoid shape with a narrow upper part and a wide lower part, the outer circumferential side surface of the metal rubber block is attached to the mounting seat, the inner circumferential side surface of the metal rubber block is attached to the heat dissipation plate on the outermost side, and the bottom surface of the metal rubber block extends out of the bottom surface of the mounting seat.

Preferably, the equal vertical installation pole that is provided with in mount pad lower surface four corners department, the installation pole passes the mesa and registrates second spring and set nut, second spring and set nut all are located the mesa below, and the second spring slides to registrate in the installation pole, and both ends are supported respectively to mesa and set nut about the second spring, set nut screw thread registrates in the installation pole.

Through the technical scheme, the invention has the beneficial effects that:

the invention adopts redundancy design, most of the conventional redundancy design is soft redundancy, and the invention is mainly characterized in that a warm backup redundancy mode is adopted for working, double systems are powered on simultaneously, but only one system works, the other system is in a waiting or fault diagnosis state, once a working node has a problem, the system is integrally switched to a standby system, but the switching time is longer and partial information can be lost when the working node has a fault. The invention adopts the combination of soft redundancy and hard redundancy, the master system and the slave system work at the same time, but only the master system returns the result after finishing the execution, the slave system does not return the result, which is equivalent to only executing the backup function, the master system and the slave system keep the data consistency through the synchronization module, when the master system has a fault, the slave system detects a fault signal, and then takes over the control right, takes over the data continuously processed by the master system, transmits the data, and automatically adds the data into the control system as the slave system after the fault of the master system is repaired, thereby achieving the fault-tolerant effect.

A support rod and a positioning plate are arranged in an upright post, a rotating shaft of a driving mechanism is provided with a rotating plate, and the rotating plate of the rotating shaft is meshed with the support rod of the upright post; when the rotating shaft rotates, the rotating plate rotates along with the rotating shaft and is pushed to the support rod to drive the lifting platform to move, when the lifting platform moves in place, the main motor and the auxiliary motor both stop working and are in a locking state, meanwhile, the hydraulic machine fills hydraulic oil into the hydraulic bag, the hydraulic bag expands to enable the positioning plate to abut against the rotating plate, the rotating plate is prevented from rotating, and the reliability is further improved. Meanwhile, the first current-conducting plate on the positioning plate is communicated with the second current-conducting plate on the rotating plate, so that the display device is connected to the power module, wiring is reduced, the phenomenon that a circuit is damaged to cause a fault when the lifting platform moves is avoided, and safety and reliability are further improved.

The display device is provided with the mounting seat and the metal rubber block, the display screen is provided with the heat dissipation plate, the metal rubber block is in an elastic porous shape, the shock insulation effect is good, the reliable work of the lifting frame is guaranteed, the metal rubber block has a sound absorption effect and can improve stage sound effect, the metal rubber block has a heat conduction effect, the metal rubber block can recover deformation after being heated, the display screen can be in a good working state, the reliability is further improved, and the shock insulation effect can be improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the connection of the mast and the drive mechanism of the present invention;

FIG. 3 is a schematic structural view of a column of the present invention;

FIG. 4 is a structural cross-sectional view of a column of the present invention;

FIG. 5 is a schematic view of the positioning plate and the first conductive plate of the present invention;

FIG. 6 is a schematic view of the mounting of the lift table and drive mechanism of the present invention;

FIG. 7 is a schematic structural view of the driving mechanism of the present invention;

FIG. 8 is a schematic view of the installation of the shaft and the conductive sleeve of the present invention;

FIG. 9 is a sectional view of the display device of the present invention;

FIG. 10 is a schematic structural view of a metal rubber block of the present invention;

wherein: 1-upright column; 2-a lifting platform; 3-a drive mechanism; 4-a frame body; 5-a table top; 6-column body; 7-a stay bar; 8, positioning a plate; 9-a first conductive plate; 10-a hydraulic bladder; 11-a rotating shaft; 12-a main motor; 13-a slave motor; 14-rotating the plate; 15-a second conductive plate; 16-a conductive post; 17-a conductive sleeve; 18-a conductive ring; 19-a display device; 20-a display screen; 21-a mounting seat; 22-metal rubber block; 23-a heat sink; 24-a mounting bar; 25-a second spring; 26-positioning the nut.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

as shown in fig. 1-10, a computer-controlled high-reliability stage lifting system comprises a vertical column 1 arranged in a pit, a lifting platform 2 lifting along the vertical column 1, and a control system for controlling the lifting platform 2 to lift;

wherein, the upright posts 1 are vertically arranged at four corners of the pit;

the four corners of the lower part of the lifting platform 2 are respectively provided with a driving mechanism 3, the driving mechanisms 3 drive the lifting platform 2 to move longitudinally along the upright post 1, each driving mechanism 3 comprises a rotating shaft 11, a main motor 12 and a slave motor 13, the main motor 12 and the slave motor 13 are both in transmission connection with the rotating shaft 11, an interlocking mechanism is arranged between the main motor 12 and the slave motor 13, and one of the main motor 12 and the slave motor 13 is in transmission connection with the rotating shaft 11 at the same time through the interlocking mechanism;

the control system comprises a console, CPU modules, a power supply module, a communication module and a synchronization module, wherein the console, the CPU modules, the power supply module and the communication module are arranged in two groups in parallel, and the synchronization module is used for communication between the two CPU modules;

the control system is configured to: the control console is in a two-machine-standby thermal working mode, and the two groups of control consoles are used for independently configuring, monitoring and managing the stage; the two groups of CPU modules run and monitor in real time in parallel on line, use the same program and receive the same data block, process mapping and internal data; the two groups of power supply modules simultaneously supply power to all the electric equipment.

In order to optimize the product structure, in this embodiment, the lifting platform 2 includes the support body 4 and the table-board 5, and the table-board 5 is fixed to be designed at the top of the support body 4, and the display device 19 is laid on the table-board 5 in an array manner, and the display device 19 includes the display screen 20, and the display screen 20 is connected to the power module.

The upright post 1 comprises a post body 6, support rods 7, a positioning plate 8, first current-conducting plates 9 and a hydraulic bag 10, the cross section of the post body 6 is C-shaped, the support rods 7 are horizontally and fixedly arranged at the opening of the post body 6, the support rods 7 are equidistantly arranged along the height direction of the post body 6 at intervals, the positioning plate 8 is flat, the positioning plate 8 is vertically arranged in the post body 6 and transversely slides along two sides of the post body 6, the first current-conducting plates 9 are long-strip-shaped, the first current-conducting plates 9 are fixedly arranged on one side, close to the support rods 7, of the positioning plate 8 along the length direction of the positioning plate 8, the first current-conducting plates 9 are arranged at intervals, the hydraulic bag 10 is positioned in the post body 6 and is positioned between one end, far away from the opening, of the post body 6 and the positioning plate 8, and the hydraulic bag 10 is communicated with a hydraulic machine;

the column 6, the stay 7 and the positioning plate 8 are made of insulating materials, and the first conductive plate 9 is made of conductive materials and connected to the power module.

The driving mechanism 3 further comprises a rotating plate 14 and a second conducting plate 15, the rotating plates 14 are uniformly arranged in a circumferential array along the circumferential outer wall of the rotating shaft 11, the rotating plates 14 of the rotating shaft 11 are meshed with the support rods 7 of the upright post 1, the second conducting plate 15 is fixedly arranged on the outer side of one end, away from the rotating shaft 11, of the rotating plate 14, the second conducting plates 15 and the first conducting plates 9 are equal in number and are arranged in a one-to-one correspondence manner, the number of the rotating plates 14 is four, and the cross section of one end, away from the rotating shaft 11, of each rotating plate 14 is in a convex semicircular shape;

the rotation shaft 11 and the rotation plate 14 are made of an insulating material, and the second conductive plate 15 is made of a conductive material and connected to the display screen 20.

In order to facilitate electric conduction, one end of the rotating shaft 11, which is close to the main motor 12 and one end of the driven motor 13, are provided with electric conduction sections, the electric conduction sections are provided with a plurality of electric conduction columns 16 in a radial sliding manner, a first spring for driving the electric conduction columns 16 to move away from the electric conduction sections is arranged between the electric conduction columns 16 and the electric conduction sections, the electric conduction sections are rotatably sleeved on an electric conduction sleeve 17, the electric conduction sleeve 17 is fixedly arranged on the frame body 4, the inner circumferential wall of the electric conduction sleeve 17 is provided with a plurality of electric conduction rings 18, one end of each electric conduction column 16 is connected to the second electric conduction plate 15, the other end of each electric conduction ring is abutted to the electric conduction ring 18, and the electric conduction rings 18 are connected to the display screen 20;

the conductive sleeve 17 is made of an insulating material, and the conductive column 16 and the conductive ring 18 are made of conductive materials.

Display device 19 still includes mount pad 21 and metal rubber piece 22, mount pad 21 includes the erection segment on upper portion and the location section of lower part, the location section is connected to support body 4, display screen 20 and metal rubber piece 22 are inlayed respectively in the erection segment and in the location section, transparent rubber layer has been pour to the display screen 20 upper surface, transparent rubber layer upper surface and mount pad 21 upper surface parallel and level, be provided with circular shape louvre between erection segment and the location section, display screen 20 lower part is provided with heating panel 23, heating panel 23 is the annular, the coaxial interval of a plurality of heating panel 23 sets up, heating panel 23 passes the louvre towards mesa 5.

The metal rubber block 22 is formed by weaving a fine spiral coil formed by winding shape memory alloy wires, the metal rubber block 22 is annular, the longitudinal section of the metal rubber block 22 is in an isosceles trapezoid shape with a narrow upper part and a wide lower part, the outer circumferential side surface of the metal rubber block 22 is attached to the installation seat 21, the inner circumferential side surface of the metal rubber block 22 is attached to the heat dissipation plate 23 on the outermost side, and the bottom surface of the metal rubber block 22 extends out of the bottom surface of the installation seat 21.

All vertical installation pole 24 that is provided with in mount pad 21 lower surface four corners department, installation pole 24 pass mesa 5 and registrate have second spring 25 and set nut 26, and second spring 25 and set nut 26 all are located mesa 5 below, and second spring 25 slides to registrate in installation pole 24, and both ends are supported respectively to mesa 5 and set nut 26 about the second spring 25, and set nut 26 screw thread registrates in installation pole 24.

In the embodiment, the CPU module adopts Siemens S7-400H series PLC; the communication module comprises DP network communication and Ethernet communication; the synchronous modules adopt optical fiber communication and event-driven synchronous setting, and synchronous operation can be carried out when the internal states of the two CPU modules are different.

In order to ensure the moving stability of the lifting platform 2, a guide post is vertically arranged, and the frame body 4 is axially sleeved on the guide post in a sliding manner. In order to improve the strength of the table-board 5, a plurality of ribs are transversely and longitudinally arranged on the lower surface of the table-board 5, the cross sections of the ribs are u-shaped, and the wires between the display screen 20 and the conducting rings 18 are arranged in the ribs.

The invention adopts redundancy design, most of the conventional redundancy design is soft redundancy, and the invention is mainly characterized in that a warm backup redundancy mode is adopted for working, double systems are powered on simultaneously, but only one system works, the other system is in a waiting or fault diagnosis state, once a working node has a problem, the system is integrally switched to a standby system, but the switching time is longer and partial information can be lost when the working node has a fault. The invention adopts the combination of soft redundancy and hard redundancy, the master system and the slave system work at the same time, but only the master system returns the result after finishing the execution, the slave system does not return the result, which is equivalent to only executing the backup function, the master system and the slave system keep the data consistency through the synchronization module, when the master system has a fault, the slave system detects a fault signal, and then takes over the control right, takes over the data continuously processed by the master system, transmits the data, and automatically adds the data into the control system as the slave system after the fault of the master system is repaired, thereby achieving the fault-tolerant effect.

A support rod 7 and a positioning plate 8 are arranged in an upright post 1, a rotating shaft 11 of a driving mechanism 3 is provided with a rotating plate 14, and the rotating plate 14 of the rotating shaft 11 is meshed with the support rod 7 of the upright post 1; when the rotating shaft 11 rotates, the rotating plate 14 rotates along with the rotating shaft 11 and is pushed to the support rod 7 to drive the lifting platform 2 to move, when the lifting platform 2 moves in place, the main motor 12 and the auxiliary motor 13 both stop working and are in a locking state, meanwhile, the hydraulic machine fills hydraulic oil into the hydraulic bag 10, the hydraulic bag 10 expands, the positioning plate 8 is abutted to the rotating plate 14, the rotating plate 14 is prevented from rotating, and the reliability is further improved. Meanwhile, the first conductive plate 9 on the positioning plate 8 is communicated with the second conductive plate 15 on the rotating plate 14, so that the display device 19 is connected to the power supply module, wiring is reduced, faults caused by circuit damage during movement of the lifting platform 2 are avoided, and safety and reliability are further improved.

The display device is provided with the mounting base 21 and the metal rubber block 22, the display screen 20 is provided with the heat dissipation plate 23, the metal rubber block 22 is in an elastic porous form, the shock insulation effect is good, the reliable work of the lifting frame is guaranteed, the metal rubber block 22 has a sound absorption effect and can improve stage sound effect, the metal rubber block 22 has a heat conduction effect, and the metal rubber block 22 can recover deformation by heating, so that the display screen 20 can be in a good working state, the reliability is further improved, and the shock insulation effect can be improved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.