An electromagnetic induction-triggered attachment type climbing formwork anti-falling system and method

Abstract

The present invention provides an electromagnetic induction triggered anti-falling system and method for an attached climbing formwork, which includes a guide rail and an electromagnetic induction device, a signal processing system, a control circuit, and an anti-falling device provided at the climbing formwork; the guide rail is arranged at the moving path of the climbing formwork, and a plurality of induction structures are arranged at equal intervals vertically along the guide rail; the induction structure is coupled with the electromagnetic induction device of the anti-falling system, so that when the climbing formwork moves along the guide rail, the induction structures of the guide rail are sequentially induced by the magnetic field to generate a magnetic flux change signal that can be received by the signal processing system; the signal processing system converts the magnetic flux change signal into an impact pulse signal and transmits it to the control circuit; when the control circuit determines that the climbing formwork is in a falling state according to the impact pulse signal, the anti-falling device is activated to brake the climbing formwork; the present invention can improve the response speed and reliability of the anti-falling mechanism, and can also record important data such as the falling time, falling speed, and falling climbing formwork load at the time of the accident, providing a basis for analyzing the accident.

Description

Technical Field

[0001] The present invention relates to the technical field of work safety, in particular to an electromagnetic induction-triggered anti-falling system and method for an attached climbing formwork Background Art

[0002] With the continuous promotion of the high-quality development of China's economy, modern construction industry has been upgraded towards automation, intelligence, prefabrication, etc. In high-rise and super-high-rise buildings, the traditional cantilevered "scaffolding" is difficult to meet the requirements, and is replaced by a mechanized attached lifting platform device (hereinafter referred to as "lifting platform" for short). It is a formwork erected to a certain height and attached to the building structure, and can climb or descend layer by layer along with the building structure by relying on its own lifting equipment and devices, and is a construction operation platform with functions of safety protection, anti-tilting, anti-falling and synchronous lifting. This device has the characteristics of safety, beauty, convenient operation and high-efficiency automation, and is mainly used for high-rise shear wall buildings, which can greatly accelerate the construction progress. At present, there are many types of anti-falling devices used in lifting platforms at home and abroad. The main function of the anti-falling device during the use of the climbing formwork is that when the climbing formwork suddenly drops, the anti-falling device can brake it to ensure the safety of the workers. However, the existing anti-falling devices are all made of materials with high hardness and strength to form the anti-falling mechanism, and the braking is realized through the mechanical structure, which has defects such as slow response speed, low safety factor, and inability to analyze the cause of the accident in the later stage. Summary of the Invention

[0003] The present invention provides an electromagnetic induction-triggered anti-falling system and method for an attached climbing formwork, which can improve the response speed and reliability of the anti-falling mechanism, and can also record important data such as the falling time, falling speed, and falling climbing formwork load when the accident occurs, providing a basis for analyzing the cause of the climbing formwork falling accident.

[0004] The present invention adopts the following technical solutions.

[0005] An electromagnetic induction-triggered anti-falling system for an attached climbing formwork, the anti-falling system includes a guide rail (8) and an electromagnetic induction device (7), a signal processing system (6), a control circuit, and an anti-falling device provided at the climbing formwork; the guide rail (8) is provided at the moving path of the climbing formwork, and a plurality of induction structures are arranged at equal intervals in the vertical direction at the guide rail; the induction structure is coupled with the electromagnetic induction device (7) of the anti-falling system, so that when the climbing formwork moves along the guide rail, the induction structures of the guide rail are sequentially induced by the magnetic field, generating a magnetic flux change signal that can be received by the signal processing system; the signal processing system (6) converts the magnetic flux change signal into an impact pulse signal and transmits it to the control circuit; when the control circuit determines that the climbing formwork is in a falling state according to the impact pulse signal, the anti-falling device is started to brake the climbing formwork.

[0006] A plurality of web members (16) are provided at equal intervals along the guide rail, and the induction structure of the guide rail is a closed conductive wire (5) connected in parallel on the front and rear surfaces of the web members.

[0007] The electromagnetic induction device includes an electromagnetic block (10); the electromagnetic block includes an iron core (2) containing a magnetic yoke (3); the two ends of the magnetic yoke are opposite to the plane where the closed conductive wires are distributed at the web members of the guide rail; a magnetic field is generated by the wire coil (1) wound around the iron core of the magnetic yoke; when the climbing frame moves and the magnetic field of the magnetic yoke cuts the closed conductive wires at the web members of the guide rail, the closed conductive wires generate a magnetic flux change signal that can be received by the signal processing system with its induced current.

[0008] The web member (16) has a rectangular block structure and is fixed to the guide rail by welding or integrally stamped with the guide rail.

[0009] The material, wire diameter, number of turns and length of the closed conductive wire are determined according to the intensity of the magnetic flux change signal that the signal processing system can receive; the climbing frame is used for the scaffolding platform; when the scaffolding platform falls, the speed of the climbing frame relative to each induction structure of the guide rail changes suddenly, causing a drastic change in the magnetic flux of the magnetic flux change signal generated by the induction structure, forming an impact pulse signal in the falling state of the climbing frame.

[0010] The frequency range of the impact pulse signal in the falling state of the climbing frame is within the frequency point range of the falling signal of the climbing frame; the signal processing system includes a filter amplifier and a logic arithmetic unit, which effectively filters out the signal frequencies outside the frequency point of the falling signal of the climbing frame sent by the electromagnetic induction device to improve the anti-interference ability and perform power amplification processing on the impact pulse signal and then send it to the control circuit.

[0011] The calculation formula for the magnetic flux change is

[0012]

[0013] Where: e is the induced electromotive force; φ is the magnetic flux; n is the number of turns of the coil; D is the effective length of a single-strand coil passing through the magnetic field; ρ r is the material-related coefficient; B is the magnetic field strength; V is the moving speed of the conductor; t is the time.

[0014] The control circuit includes a microcontroller and a relay. The microcontroller issues an action / non-action instruction to the relay connected to the anti-falling mechanism according to the signal sent by the signal processing system.

[0015] The microcontroller is a single-chip microcomputer or a PLC, which receives and processes the control signals input from the signal processing system and the human-machine interface, records the input time and information volume of the control signals, and obtains the corresponding characteristic parameters when the climbing frame falling accident occurs. The corresponding characteristic parameters include the falling time, falling speed, and falling climbing frame load, which are used to provide a basis for analyzing the cause of the climbing frame falling accident.

[0016] In the anti-falling mechanism, a pair of motors (11) are provided on both sides, which are fixed through the motor base and the support structure inside the anti-falling mechanism housing. The motor is connected to a spur gear (12) by a connecting shaft to drive the anti-falling block (13). When the control circuit determines that the climbing frame is falling, the motor starts and drives the anti-falling block to move to the guide rail to brake the climbing frame to prevent falling.

[0017] When the climbing frame is in the normal working state and needs to be fixed, the control circuit controls the anti-falling mechanism to press the anti-falling block against the guide rail, and cooperates with the power mechanism of the climbing frame itself to perform multiple fixing of the climbing frame position.

[0018] A multiple fixing method for an electromagnetic induction-triggered attached climbing frame anti-falling system, using the anti-falling system described above, is characterized in that: the power mechanism of the climbing frame itself is an electric hoist, and the multiple fixing method includes the following methods;

[0019] Method A1: During the normal ascending or descending process of the climbing frame, the speed is slow and the change rate is small. The electromagnetic induction device cannot generate an impact pulse signal within the frequency range of the climbing frame falling signal at the induction structure of the guide rail, and the anti-falling device does not brake. At this time, the climbing frame performs normal ascending or descending operations.

[0020] Method A2: After the climbing frame normally ascends or descends to the specified working position, on the one hand, the electric hoist brakes the climbing frame, and on the other hand, a braking instruction is input through the human-machine interface of the control circuit to drive the anti-falling device to act to brake the climbing frame, realizing double braking of the climbing frame.

[0021] Method A3: When the climbing frame changes from the fixed state to the normal ascending or descending state, a braking release instruction is input through the human-machine interface of the control circuit to drive the anti-falling device to act to release the brake of the climbing frame, and the electric hoist realizes the normal ascending or descending operation of the climbing frame. At this time, the anti-falling system works in the anti-falling mode.

[0022] An anti-falling method for an electromagnetic induction-triggered attached climbing frame anti-falling system, using the anti-falling system described above, is characterized in that: the anti-falling method includes the following steps;

[0023] Step S1: When the climbing frame falls, it moves rapidly downward relative to the guide rail, causing the multi-turn closed conductive wire at the web member (16) to quickly cut the magnetic lines of force between the two ends of the magnetic yoke, generating a falling state impact pulse signal that can be received by the signal processing system;

[0024] Step S2: The signal processing system filters and amplifies the falling impact pulse signal and then instructs the control circuit to drive the anti-falling device to act;

[0025] Step S3: The anti-falling motor starts, driving the anti-falling block (13) to block the web member (16) in the middle of the guide rail, completing the emergency braking of the falling climbing frame;

[0026] Step S4: The control circuit stores the characteristics of the falling state pulse signal in step S2 through the microprocessor and analyzes the cause of the accident;

[0027] When calculating the load weight during the process of analyzing the cause of the accident, it is calculated through the speed change Δv and the falling time Δt, that is, the acceleration a is converted by the formula a = Δv / Δt, and then the load weight is obtained through the force F = ma on the climbing frame.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. The design method of the electromagnetic induction-triggered attached climbing frame anti-falling system described in the present invention can ensure that the climbing frame is in a fixed state by both the electric hoist and the electromagnetic induction-triggered attached climbing frame anti-falling device during the normal operation of the lifting platform. At the same time, when the platform falls, a falling pulse signal can be generated by the multi-turn conductive wire segment of the web member quickly cutting the magnetic lines of force generated at both ends of the magnetic yoke. After the signal is processed by the signal processing system and the filter amplifier, it instructs the control circuit to drive the anti-falling device to act, thus completing the braking of the climbing frame. Therefore, it has a faster response speed and a higher safety factor.

[0030] 2. The present invention has strong controllability, can achieve human-computer interaction, and can also record information such as the time and magnitude of various control signal inputs, obtaining the corresponding characteristic parameters when the climbing frame falling accident occurs, including the falling time, falling speed, and load of the falling climbing frame, providing a basis for analyzing the cause of the climbing frame falling accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following further details the present invention in conjunction with the drawings and specific embodiments:

[0032] Attached Figure 1 is a schematic diagram of the operation process of an electromagnetic induction-triggered attached climbing frame anti-falling system of the present invention;

[0033] Attached Figure 2 is a schematic diagram of the principle of the electromagnetic induction device of the present invention;

[0034] AttachedFigure 3 Cross-sectional schematic view of the electromagnetic induction device of the present invention;

[0035] Appendix Figure 4 Schematic view of the anti-falling device of the present invention;

[0036] Appendix Figure 5 Schematic model view of the outer shell of the anti-falling system of the present invention;

[0037] Appendix Figure 6 Schematic view of the operation during the implementation of the present invention;

[0038] Appendix Figure 7 Another schematic view of the anti-falling device of the present invention;

[0039] In the figure: 1 - wire coil; 2 - iron core; 3 - magnetic yoke; 4 - magnetic field lines; 5 - closed conductive wire; 6 - signal processing system; 7 - electromagnetic induction device; 8 - guide rail; 9 - connecting guide post; 10 - electromagnetic block; 11 - motor; 12 - gear; 13 - anti-falling block (with built-in rack); 14 - support base; 15 - housing; 16 - web member; 17 - anti-falling device. Detailed implementation manners

[0040] As shown in the figure, a fall-prevention system for an attached climbing formwork based on electromagnetic induction triggering, the fall-prevention system includes a guide rail 8 and an electromagnetic induction device 7, a signal processing system 6, a control circuit, and an anti-falling device 17 provided at the climbing formwork; the guide rail is provided at the moving path of the climbing formwork, and a plurality of induction structures are arranged at equal intervals vertically at the guide rail; the induction structure is coupled with the electromagnetic induction device of the fall-prevention system, so that when the climbing formwork moves along the guide rail, the induction structures of the guide rail are sequentially induced by the magnetic field, generating a magnetic flux change signal that can be received by the signal processing system; the signal processing system converts the magnetic flux change signal into an impact pulse signal and transmits it to the control circuit; when the control circuit determines that the climbing formwork is in a falling state according to the impact pulse signal, the anti-falling device is activated to brake the climbing formwork.

[0041] A plurality of web members 16 are arranged at equal intervals at the guide rail, and the induction structure of the guide rail is a closed conductive wire 5 connected in parallel on the front surface and the rear surface of the web member.

[0042] Such as Figure 2 , Figure 3 shown, the electromagnetic induction device includes an electromagnetic block (10); the electromagnetic block includes an iron core 2 containing a magnetic yoke 3; the two end heads of the magnetic yoke are directly opposite to the plane where the closed conductive wires are distributed at the web member; the magnetic yoke generates a magnetic field with the wire coil 1 wound around the iron core; when the climbing formwork moves to make the magnetic field of the magnetic yoke cut the closed conductive wire at the web member of the guide rail, the closed conductive wire generates a magnetic flux change signal that can be received by the signal processing system with its induced current.

[0043] The web member is in a rectangular block structure and is fixed to the guide rail by welding or integrally formed by stamping with the guide rail.

[0044] The material, wire diameter, number of turns and length of the closed conductive wire are determined according to the magnetic flux change signal intensity that the signal processing system can receive; the climbing frame is used for the scaffolding platform; when the scaffolding platform falls, the speed of the climbing frame relative to each induction structure of the guide rail changes suddenly, causing a drastic change in the magnetic flux of the magnetic flux change signal generated by the induction structure, forming an impact pulse signal in the falling state of the climbing frame.

[0045] The frequency range of the impact pulse signal in the falling state of the climbing frame is within the frequency point range of the falling signal of the climbing frame; the signal processing system includes a filter amplifier and a logic arithmetic unit, which effectively filters out the signal frequencies outside the frequency point of the falling signal of the climbing frame sent by the electromagnetic induction device to improve the anti-interference ability and perform power amplification processing on the impact pulse signal and then send it to the control circuit.

[0046] The calculation formula for the magnetic flux change is

[0047]

[0048] where: e is the induced electromotive force; φ is the magnetic flux; n is the number of turns of the coil; D is the effective length of a single-strand coil passing through the magnetic field; ρ r is the material correlation coefficient; B is the magnetic field strength; V is the conductor movement speed; t is the time.

[0049] The control circuit includes a microcontroller and a relay. The microcontroller issues an action / non-action command to the relay connected to the anti-falling mechanism according to the signal sent by the signal processing system.

[0050] The microcontroller is a single-chip microcomputer or a PLC, which receives and processes the control signals input from the signal processing system and the human-machine interface, and records the input time and information volume of the control signals to obtain the corresponding characteristic parameters when the climbing frame falling accident occurs. The corresponding characteristic parameters include the falling occurrence time, falling speed, and falling climbing frame load, which are used to provide a basis for analyzing the cause of the climbing frame falling accident.

[0051] As Figure 4 shown, in the anti-falling mechanism, a pair of motors 11 are provided on both sides, fixed through the motor base and the support structure inside the anti-falling mechanism housing. The motors drive the anti-falling blocks 13 through connecting shafts and spur gears. When the control circuit determines that the climbing frame is falling, the motors start and drive the anti-falling blocks to move to the guide rail to brake the climbing frame to prevent it from falling.

[0052] When the climbing frame is in the normal operation state and needs to be fixed, the control circuit controls the anti-falling mechanism to press the anti-falling blocks against the guide rail to cooperate with the power mechanism of the climbing frame itself to perform multiple fixations on the position of the climbing frame.

[0053] A multiple fixing method for an attachment type climbing formwork anti-falling system triggered by electromagnetic induction, adopting the above-mentioned anti-falling system, characterized in that: the power mechanism of the climbing formwork itself is an electric hoist, and the multiple fixing method includes the following methods;

[0054] Method A1: During the normal ascending or descending process of the climbing formwork, the speed is slow and the change rate is small. The electromagnetic induction device cannot make the induction structure at the guide rail generate impact pulse signals within the frequency range of the climbing formwork falling signal. The anti-falling device does not brake, and at this time, the climbing formwork performs normal ascending or descending operations;

[0055] Method A2: After the climbing formwork normally ascends or descends to the designated working position, on the one hand, the electric hoist brakes the climbing formwork, and on the other hand, a braking instruction is input through the human-machine interface of the control loop to drive the anti-falling device to act and brake the climbing formwork, realizing double braking of the climbing formwork;

[0056] Method A3: When the climbing formwork changes from the fixed state to normal ascending or descending, a braking release instruction is input through the human-machine interface of the control loop to drive the anti-falling device to act and release the brake on the climbing formwork. The electric hoist realizes the normal ascending or descending operation of the climbing formwork. At this time, the anti-falling system works in the anti-falling mode.

[0057] An anti-falling method for an attachment type climbing formwork anti-falling system triggered by electromagnetic induction, adopting the above-mentioned anti-falling system, characterized in that: the anti-falling method includes the following steps;

[0058] Step S1: When the climbing formwork falls, it moves rapidly downward relative to the guide rail, causing the multi-turn closed wire in the web member to quickly cut the magnetic lines of force between the two ends of the magnetic yoke, generating a falling state impact pulse signal that can be received by the signal processing system;

[0059] Step S2: The signal processing system filters and amplifies the falling impact pulse signal and then instructs the control loop to drive the anti-falling device to act;

[0060] Step S3: The anti-falling motor starts, driving the anti-falling block to block the web member in the middle of the guide rail, completing the emergency braking of the falling climbing formwork;

[0061] Step S4: The control loop stores the characteristics of the falling state pulse signal in step S2 through the microprocessor and analyzes the cause of the accident;

[0062] When calculating the load weight during the process of analyzing the cause of the accident, it is calculated through the speed change Δv and the falling time Δt, that is, the acceleration a is converted by the formula a = Δv / Δt, and then the load weight is obtained through the force on the climbing formwork F = ma.

[0063] In this example, the sudden change in speed during the fall of the scaffolding platform triggers a change in magnetic flux in the electromagnetic induction device, generating an impact pulse signal. After being processed by the signal processing system, the control circuit is triggered to start the anti-fall device to brake the climbing frame.

[0064] Figure 5 As shown in the schematic diagram of the overall structure of the anti-fall system, its housing (15) is shaped like an I-beam, which not only reduces the complexity of the overall layout but also takes into account the tightness of functional connections. The upper part of the housing (15) is composed of a support base (14), and the overall mechanism can be fixed to the building through four countersunk bolts.

[0065] Example 1:

[0066] As Figure 6 shown, an electromagnetic induction-triggered attached climbing frame anti-fall system of the present invention is installed on an aluminum attached lifting climbing frame with a load of 1300 kg.

[0067] When the electric hoist drives the climbing frame to rise / fall at a normal speed of 2 mm / s, the 60-turn wire segment on the web member of the guide rail cuts the magnetic induction lines uniformly, and the electromagnetic induction device generates a very weak electrical signal and sends it to the signal processing system. After passing through the filter amplifier, it is filtered out and cannot trigger the control circuit to drive the anti-fall device to act. At this time, the anti-fall device remains stationary.

[0068] When a sudden fall accident of the attached climbing frame is artificially set, the 60-turn wire segment on the web member driven by the guide rail cuts the magnetic induction lines at a speed of 2 m / s, generating a falling impact signal with a maximum induced electromotive force of 5.6 V. Through the filter amplifier and logic arithmetic unit, a driving instruction for the anti-fall device to operate is sent to the control circuit to complete the braking of the climbing frame.

[0069] In this example, the response time of the anti-fall device operation is less than 1 s. At the same time, the microcontroller records information such as the input time and magnitude of the falling pulse signal through program design, obtains the characteristic parameters corresponding to the occurrence of the climbing frame fall accident, accurately records the falling time, and obtains the falling speed of 1.98 m / s and the falling climbing frame load of 1298.97 kg through the conversion and processing of the falling signal, providing a basis for subsequent analysis of the cause of the climbing frame fall accident.

[0070] Example 2:

[0071] As Figure 6 shown, an electromagnetic induction-triggered attached climbing frame anti-fall system of the present invention is installed on an aluminum attached lifting climbing frame with a load of 1300 kg. When the climbing frame rises or falls to a specified position, the anti-fall system enters the normal hovering operation state and does not generate an anti-fall trigger signal.

[0072] At this time, a braking instruction is sent to the anti-falling mechanism through the human-machine interaction indication system. The anti-falling mechanism can brake reliably, assisting the electric hoist to double ensure that the climbing frame is in a fixed state, and its stability and reliability during normal operation have been significantly improved.

[0073] The above combines the specific implementation manners of the embodiments described by the accompanying drawings, and further elaborates on the above content of the present invention. However, this should not be understood as limiting the scope of the above subject matter of the present invention to the following examples. Without departing from the above technical idea of the present invention, various substitutions or changes made according to ordinary technical knowledge and conventional means in the art should be included within the scope of the present invention.

Claims

1. An electromagnetic induction-triggered attachment type climbing formwork anti-falling system, characterized in that: The anti-falling system includes a guide rail (8), an electromagnetic induction device (7), a signal processing system (6), a control circuit, and an anti-falling device provided at the climbing frame. The guide rail (8) is arranged at the moving path of the climbing frame, and a plurality of induction structures are arranged at equal intervals vertically at the guide rail. The induction structure is coupled with the electromagnetic induction device (7) of the anti-falling system, so that when the climbing frame moves along the guide rail, the induction structures of the guide rail are sequentially induced by the magnetic field, generating a magnetic flux change signal that can be received by the signal processing system. The signal processing system (6) converts the magnetic flux change signal into an impact pulse signal and transmits it to the control circuit. When the control circuit determines that the climbing frame is in a falling state according to the impact pulse signal, the anti-falling device is activated to brake the climbing frame.

2. The attachment type climbing formwork anti-falling system triggered by electromagnetic induction according to claim 1, characterized in that: A plurality of equally spaced web members (16) are provided at the guide rail, and the induction structure of the guide rail is a closed conductive wire (5) connected in parallel on the front and rear surfaces of the web member.

3. The anti-falling system for an attached climbing formwork triggered by electromagnetic induction according to claim 2, characterized in that: The electromagnetic induction device includes an electromagnetic block (10). The electromagnetic block includes an iron core (2) containing a magnetic yoke (3). The two ends of the magnetic yoke are opposite to the plane where the closed conductive wires are distributed at the web member of the guide rail. The magnetic yoke generates a magnetic field with a wire coil (1) wound around the iron core. When the climbing frame moves and the magnetic field of the magnetic yoke cuts the closed conductive wire at the web member of the guide rail, the closed conductive wire generates a magnetic flux change signal that can be received by the signal processing system with its induced current.

4. The attachment type climbing formwork anti-falling system triggered based on electromagnetic induction according to claim 3, characterized in that: The web member (16) has a rectangular block structure and is fixed to the guide rail by welding or integrally stamped with the guide rail.

5. A kind of electromagnetic induction triggered attachment type climbing frame anti-falling system according to claim 3, characterized in that: The material, wire diameter, number of turns, and length of the closed conductive wire are determined according to the intensity of the magnetic flux change signal that the signal processing system can receive. The climbing frame is used for the scaffolding platform. When the scaffolding platform falls, the speed of the climbing frame relative to each induction structure of the guide rail changes suddenly, causing a drastic change in the magnetic flux of the magnetic flux change signal generated by the induction structure, forming an impact pulse signal in the falling state of the climbing frame. The frequency range of the impact pulse signal in the falling state of the climbing frame is within the frequency point range of the falling signal of the climbing frame. The signal processing system includes a filter amplifier and a logic arithmetic unit, which effectively filters out the signal frequencies outside the frequency point of the falling signal of the climbing frame sent by the electromagnetic induction device to improve the anti-interference ability and perform power amplification processing on the impact pulse signal and then send it to the control circuit.

6. The attachment type climbing formwork anti-falling system triggered by electromagnetic induction according to claim 5, characterized in that: The calculation formula for the magnetic flux change is Formula 1; Wherein: e is the induced electromotive force; is the magnetic flux; is the number of turns of the coil; is the effective length of a single turn of the coil passing through the magnetic field; is the material coefficient; B is the magnetic field strength; V is the conductor movement speed; t is the time; , .

7. A kind of electromagnetic induction-triggered attached climbing formwork anti-falling system according to claim 1, characterized in that: The control circuit includes a microcontroller and a relay. The microcontroller issues an action / non-action instruction to the relay connected to the anti-falling mechanism according to the signal sent by the signal processing system. The microcontroller is a single-chip microcomputer or a PLC, receives and processes the control signals input from the signal processing system and the human-machine interface, records the input time and information volume of the control signals, and obtains the corresponding characteristic parameters when the climbing frame falling accident occurs. The corresponding characteristic parameters include the falling occurrence time, falling speed, and falling climbing frame load, which are used to provide a basis for analyzing the cause of the climbing frame falling accident.

8. The electromagnetic induction triggered attachment type climbing formwork anti-falling system according to claim 5, characterized in that: In the anti-falling mechanism, a pair of motors (11) are provided on both sides, and are fixed through the motor base and the support structure inside the anti-falling mechanism housing. The motors are connected to spur gears (12) by connecting shafts to drive the anti-falling blocks (13). When the control circuit determines that the climbing frame is falling, the motors are started and the anti-falling blocks are driven by the spur gears to move to the guide rail to brake the climbing frame to prevent falling. When the climbing frame is in a normal working state and needs to be fixed, the control circuit controls the anti-falling mechanism so that the anti-falling blocks press on the guide rail, and cooperates with the power mechanism of the climbing frame itself to fix the position of the climbing frame in multiple ways.

9. A multiple fixation method for an attached climbing formwork anti-falling system triggered by electromagnetic induction, using the anti-falling system described in claim 8, characterized in that: The power mechanism of the climbing frame itself is an electric hoist, and the multiple fixing methods include the following methods; Method A1: During the normal ascending or descending process of the climbing frame, the speed is slow and the change rate is small. The electromagnetic induction device cannot make the induction structure at the guide rail generate impact pulse signals within the falling signal frequency range of the climbing frame. The anti-falling device does not brake, and at this time, the climbing frame performs normal ascending or descending operations. Method A2: After the climbing frame normally ascends or descends to the designated working position, on the one hand, the electric hoist brakes the climbing frame, and on the other hand, a braking instruction is input through the human-machine interface of the control circuit to drive the anti-falling device to act and brake the climbing frame, realizing double braking of the climbing frame. Method A3: When the climbing frame changes from the fixed state to normal ascending or normal descending, a braking release instruction is input through the human-machine interface of the control circuit to drive the anti-falling device to act to release the brake on the climbing frame, and the electric hoist realizes the normal ascending or descending operation of the climbing frame. At this time, the anti-falling system works in the anti-falling mode.

10. A fall prevention method for an attached climbing formwork fall prevention system triggered by electromagnetic induction, using the fall prevention system described in claim 8, characterized in that: The anti-falling method includes the following steps; Step S1: When the climbing frame falls, it moves rapidly downward relative to the guide rail, causing the multi-turn closed wire at the web member (16) to rapidly cut the magnetic lines of force between the two ends of the magnetic yoke, generating a falling state impact pulse signal that can be received by the signal processing system. Step S2: The signal processing system filters and amplifies the falling impact pulse signal and then instructs the control circuit to drive the anti-falling device to act. Step S3: The anti-falling motor is started, driving the anti-falling block (13) to block the web member (16) in the middle of the guide rail, completing the emergency braking of the falling climbing frame. Step S4: The control circuit stores the characteristics of the falling state pulse signal in step S2 through the microprocessor and analyzes the cause of the accident. When calculating the load weight during the process of analyzing the cause of the accident, it is calculated through the speed change Δv and the falling time Δt, that is, the acceleration a is converted by the formula a = Δv / Δt, and then the load weight is obtained through the force on the climbing frame F = ma.

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