Intelligent safety risk alarm method and device for ladder

Abstract

The invention relates to the technical field of ladders, in particular to an intelligent safety risk alarm method and device for a ladder. Certain safety judgment is performed after the ladder is placed; after the ladder is placed through the stress detection part, data acquisition is carried out, specifically, pressure applied to the ladder by the wall surface, supporting force applied to the ladder by the ground and the length of the ladder; collecting data and transmitting the data to a signal processing module to analyze whether the ladder is used safely in two modes, specifically, whether the erecting angle of the ladder exceeds the standard and whether the erecting ground is uneven when no operation is carried out; during operation, whether the ladder bears overweight or not, whether climbing is ultrahigh or not, whether forward thrust is too large or not and whether left-right push-pull force is too large or not are judged, potential safety risks are found in time according to various stress conditions of the ladder in the using process, and therefore accidents caused by unstable or overweight or other reasons of the ladder are avoided; by utilizing the sensor and the signal processing module, the intelligent monitoring of the use state of the ladder is realized, and the need of manual inspection is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ladders, and in particular to an intelligent safety risk alarm method and device for ladders. Background Art

[0002] Ladders are often used in people's daily life and work. They are common tools for high-altitude operations. To ensure safety, the company's power safety work regulations and power construction safety work regulations have clearly put forward a series of requirements for high-altitude operations on ladders:

[0003] When working with a single ladder, the angle between the ladder and the ground is about 60°;

[0004] The ladder should be placed firmly, and the angle between it and the ground should be 60° to 70°;

[0005] The support of the ladder should be able to bear the total weight of the operator and the tools and materials they carry when climbing;

[0006] The ladder should not be moved when people are on it. A height limit sign should be set 1m from the top of the ladder.

[0007] In actual production and life, there are many safety hazards in the use of ladders for installation and operation:

[0008] During installation, there is a risk that the angle between the ladder and the ground exceeds 60° to 70°, or the ladder becomes unstable on uneven ground.

[0009] During operation, there is a risk of overweight of operators and the tools and materials they carry; the risk of operators climbing higher than the 1-meter height limit; the risk of operators pushing and pulling too much from the side and from the front during operation. The current ladders fail to provide a relatively complete alarm for these safety hazards:

[0010] Problems with current technology:

[0011] 1. The existing technology cannot respond well to the risk of ladder installation: during installation, the angle between the ladder and the ground exceeds 60° to 70°, and the installation ground is uneven, which may cause an alarm;

[0012] 2. Existing technologies cannot fully respond to operational behavior risk alarms and issue system alarms, such as overweight, over-height climbing alarms, excessive forward thrust alarms, and excessive left and right push and pull force alarms. Summary of the invention

[0013] In view of the above-mentioned problems that the existing technology cannot respond well to the risks of ladder erection: during erection and installation, the angle between the ladder and the ground exceeds 60°~70°, and the alarm is triggered when the erection ground is uneven; the existing technology cannot fully respond to the risk alarm of operation behavior and issue system alarms, such as the alarm of climbing too high, the alarm of excessive forward thrust in the operation, and the alarm of excessive left and right push and pull forces in the operation, the present invention is proposed.

[0014] Therefore, an object of the present invention is to provide an intelligent safety risk alarm method for ladders.

[0015] In order to solve the above technical problems, the present invention provides the following technical solutions: an intelligent safety risk alarm method for ladders, comprising:

[0016] After placing the ladder, make a certain safety judgment; after placing the ladder, collect data through the force detection component, specifically:

[0017] The pressure of the wall on the ladder and the support of the ground on the ladder;

[0018] The collected data is transmitted to the signal processing module to analyze whether the ladder is safe to use in the two modes, specifically:

[0019] Whether the angle of the ladder exceeds the standard and the ground is uneven when there is no work;

[0020] During operation, check whether the ladder is overloaded, whether the climbing height is too high, whether the forward thrust is too large, and whether the left and right push and pull forces are too large.

[0021] As a preferred solution of the intelligent safety risk alarm method for ladders of the present invention, in which: when there is no operation, first determine whether it is empty, as follows:

[0022] When (N2-N1×cos(arccot(N1 / G×L2 / L))) / sin(arccot(N1 / G×L2 / L))-G<no-load threshold, where N2 is the support force of the ground on the ladder, N1 is the pressure of the wall on the ladder, L is the length of the ladder, L2 is the distance from the center of gravity of the ladder to the ladder foot, and G is the weight of the ladder, the signal processing module determines that the ladder is in an no-load state, otherwise it is in an operating state.

[0023] As a preferred solution of the intelligent safety risk alarm method for ladders of the present invention, it is judged whether there is unevenness on the erection ground in the no-load state, as follows:

[0024] When N2 left or N2 right is less than the safety pressure threshold of the unloaded left and right supporting feet, where N2 left is the pressure of the ground on the left vertical rod and N2 right is the pressure of the ground on the right vertical rod, an alarm for uneven erection ground will be issued.

[0025] As a preferred solution of the intelligent safety risk alarm method for ladders of the present invention, it is judged whether the erection angle exceeds the standard in the no-load state, specifically as follows:

[0026] When arccot(N1 / G×L2 / L)>the upper limit of the ladder setting angle threshold, or arccot(N1 / G×L2 / L)>the lower limit of the ladder setting angle threshold, where N1 is the pressure exerted by the wall on the ladder, L is the length of the ladder, L2 is the distance from the center of gravity of the ladder to the ladder foot, and G is the weight of the ladder, an alarm indicating that the ladder setting angle exceeds the limit will be issued.

[0027] As a preferred solution of the intelligent safety risk alarm method for ladders of the present invention, it is determined whether there is an overweight situation in the working state, specifically as follows:

[0028] When (△N2-△N1×cos(θ)) / sin(θ)>ladder load threshold, where θ is the inclination angle between the ladder and the ground, △N2 is the change in the ground support force given to the ladder before and after the operation, and △N1 is the change in the wall support force given to the ladder before and after the operation, an overweight alarm will be issued.

[0029] As a preferred solution of the intelligent safety risk alarm method for ladders of the present invention, it is judged whether there is an over-height situation in the working state, specifically as follows:

[0030] When (1-(ΔN2 / ΔN1 / cos(θ)-1)×cot(θ)^2)×L<1, θ is the inclination angle between the ladder and the ground, ΔN2 is the change in the ground support force given to the ladder before and after the operation, ΔN1 is the change in the wall support force given to the ladder before and after the operation, and L is the length of the ladder. At this time, an over-height alarm is issued.

[0031] As a preferred solution of the intelligent safety risk alarm method for ladders of the present invention, it is determined whether an excessive thrust alarm will be issued in the working state, specifically as follows:

[0032] When N1 is less than the safety threshold of the forward thrust of the operation, where N1 is the support force given to the ladder by the wall before and after the operation, an alarm of excessive forward thrust of the operation will be issued; when N2 left or N2 right is less than the safety threshold of the left and right push-pull force of the operation, where N2 left is the support force given to the left vertical rod by the ground before and after the operation, and N2 right is the support force given to the right vertical rod by the ground before and after the operation, an alarm of excessive left and right push-pull force of the operation will be issued.

[0033] An intelligent safety risk alarm device for a ladder, comprising the above-mentioned force detection component, includes:

[0034] The load-bearing component comprises a ladder body and a detection prompting piece. The ladder body is a device for detecting whether there is a risk when in use, and the detection prompting piece is arranged on the ladder body.

[0035] As a preferred solution of the intelligent safety risk alarm device for ladders of the present invention, the ladder body includes a left vertical rod, a right vertical rod symmetrically arranged on the left vertical rod, and a telescopic foot arranged on the left vertical rod or the right vertical rod.

[0036] As a preferred solution of the intelligent safety risk alarm device for ladders of the present invention, the detection prompt component includes an upper left pressure sensor fixedly connected to the upper side of the left vertical rod, a lower left supporting force sensor fixedly connected to the lower side of the left vertical rod, an upper right pressure sensor fixedly connected to the upper side of the right vertical rod, a lower right supporting force sensor fixedly connected to the lower side of the right vertical rod, and an alarm arranged on the left vertical rod or the right vertical rod.

[0037] The beneficial effects of the present invention are as follows: by real-time monitoring of various stress conditions of the ladder during use, potential safety risks can be discovered in time, thereby avoiding accidents caused by unstable ladders or overweight, etc.; by using sensors and signal processing modules, intelligent monitoring of the use status of the ladder is realized, reducing the need for manual inspection and improving monitoring efficiency; when it is detected that the ladder is unsafe to use, the system can issue an alarm in real time to remind the user to take immediate measures to avoid danger; it can not only detect the empty state and working state of the ladder, but also judge the ladder's erection angle, ground flatness, overweight and climbing height, etc., covering a variety of factors that may lead to safety accidents;

[0038] Through the automated detection and alarm mechanism, the user's judgment process on the safety status of the ladder is simplified, making the operation easier. By preventing accidents, the property loss and maintenance costs caused by improper use of ladders are reduced. Since ladders are safer to use, workers can complete their work quickly while ensuring safety, which improves work efficiency. It is suitable for various types of ladders, including straight ladders and telescopic ladders, as well as ladders of different lengths and weights, and has a wide range of applications. The modular design of sensors and alarm devices makes maintenance and replacement more convenient, reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 The present invention is a force diagram of an intelligent safety risk alarm method for a ladder when it is unloaded.

[0041] Figure 2 The present invention is a schematic diagram of the operating state of an intelligent safety risk alarm method for a ladder.

[0042] Figure 3 The present invention is a flowchart of an intelligent safety risk alarm method for ladders.

[0043] Figure 4 The present invention is a schematic diagram of the force and installation structure of a straight ladder of an intelligent safety risk alarm device for ladders.

[0044] Figure 5 The present invention is a schematic diagram of the force and installation structure of a telescopic ladder of an intelligent safety risk alarm device for ladders.

[0045] Description of the drawings: 100, load-bearing component; 101, ladder body; 101a, left vertical rod; 101b, right vertical rod; 101c, telescopic foot; 102, detection reminder; 102a, upper left pressure sensor; 102b, upper right pressure sensor; 102c, lower left supporting force sensor; 102d, lower right supporting force sensor; 102e, alarm. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0047] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0049] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0050] Example 1

[0051] Reference Figure 1-Figure 3, which is the first embodiment of the present invention, provides an intelligent safety risk alarm method for ladders, the contents of which are as follows:

[0052] First, place the ladder through the force detection component and collect data, specifically:

[0053] The pressure of the wall on the ladder, the support of the ground on the ladder and the length of the ladder;

[0054] When the ladder is set up on the ground against the wall, the pressure of the ladder against the wall is N1=N1left+N1right, where N1 is the pressure of the wall on the ladder, N1left is the pressure of the wall on the left vertical rod; N1right is the pressure of the wall on the right vertical rod;

[0055] The support force of the ladder's support foot on the ground is N2 = N2 left + N2 right, where N2 left is the support force of the ground on the left vertical rod, N2 right is the support force of the ground on the right vertical rod, and N2 is the support force of the ground on the ladder;

[0056] Since N1 = L / L2 × G × cot (θ) when unloaded, L is the length of the ladder, L2 is the distance from the center of gravity of the ladder to the foot of the ladder, and θ is the inclination angle between the ladder and the ground;

[0057] Since L is a detectable value, we can get the inclination angle between the ladder and the ground θ = arccot(N1 / G×L2 / L), and the ladder weight G = (N1-N2×cos(θ)) / sin(θ), where N2 is the support force of the ground on the ladder, N1 is the pressure of the wall on the ladder, L is the length of the ladder, L2 is the distance from the center of gravity of the ladder to the foot of the ladder, and G is the weight of the ladder. The collected data is transmitted to the signal processing module to analyze whether the ladder is safe to use before the operation;

[0058] S1. In the non-operation state, first determine whether it is empty, as follows:

[0059] When (N2-N1×cos(arccot(N1 / G×L2 / L))) / sin(arccot(N1 / G×L2 / L))-G<the no-load threshold, the signal processing module determines that the ladder is in an no-load state, otherwise it is in an operating state.

[0060] S2. In the no-load state, determine whether the installation ground is uneven, as follows:

[0061] When N2 left or N2 right is less than the safety pressure threshold of the left and right supporting feet without load, an alarm for uneven erection ground will be issued.

[0062] S3. Determine whether the erection angle exceeds the standard in the no-load state, as follows:

[0063] When arccot(N1 / G×L2 / L)>the upper limit of the ladder setting angle threshold, or arccot(N1 / G×L2 / L)<the lower limit of the ladder setting angle threshold, that is, arccot(N1 / G×L2 / L)>70°, or arccot(N1 / G×L2 / L)<60°, an alarm of ladder setting angle exceeding the limit will be issued.

[0064] During the operation, the data collected first, such as the pressure of the wall on the ladder, the supporting force of the ground on the ladder and the length of the ladder, are used to further analyze whether the angle of the ladder exceeds the standard when there is no operation and whether the installation ground is uneven, so as to further ensure the safe use of the ladder before the operation.

[0065] Example 2

[0066] Reference Figure 1 - Figure 3 , which is the second embodiment of the present invention, provides an intelligent safety risk alarm method for ladders, the contents of which are as follows:

[0067] By collecting data and transmitting it to the signal processing module, it is analyzed whether the use of the ladder during operation is safe;

[0068] △N2left is the change value of N2left, that is, the change value of the support force given by the ground to the left vertical rod, △N2right is the change value of N2right, that is, the change value of the support force given by the ground to the right vertical rod, △N2=△N2left+△N2right is the change value of N2, that is, the change value of the support force given by the ground to the ladder, among which N2left is the support force given by the ground to the left vertical rod, and N2right is the support force given by the ground to the right vertical rod;

[0069] Similarly, △N1=△N1left+△N1right=the change in N1 is the change in the pressure exerted by the wall on the ladder.

[0070] From the above, we can get the load capacity of the ladder operation ΔG=(△N2-△N1×cos(θ)) / sin(θ);

[0071] According to the attached Figure 2 From the force analysis diagram, we can see that L2 = (N2 / N1 / cos(θ)-1)×cot(θ)^2×L, where L2 is the distance from the center of gravity of the ladder to the foot of the ladder;

[0072] From the above, we can know that the distance from the ladder operator to the top of the ladder is:

[0073] L1ΔG=L-L2=(1-(ΔN2 / ΔN1·cos(θ)-1)·cot(θ)^2)×L, where L1ΔG is the position where the operator climbs, L is the length of the ladder, L1 is the distance from the top of the ladder to the center of gravity of the ladder, and L2 is the distance from the center of gravity of the ladder to the foot of the ladder;

[0074] S1. Determine whether there is overweight in the operating state, as follows:

[0075] When (△N2-△N1×cos(θ)) / sin(θ)>ladder load threshold, where θ is the inclination angle between the ladder and the ground, △N2 is the change in the ground support force given to the ladder before and after the operation, and △N1 is the change in the wall support force given to the ladder before and after the operation, an overweight alarm will be issued.

[0076] S2. Determine whether there is a climbing overheight situation during operation, as follows:

[0077] When (1-(ΔN2 / ΔN1 / cos(θ)-1)×cot(θ)^2)×L<1, θ is the inclination angle between the ladder and the ground, ΔN2 is the change in the ground support force given to the ladder before and after the operation, ΔN1 is the change in the wall support force given to the ladder before and after the operation, and L is the length of the ladder. At this time, an over-height alarm is issued.

[0078] S3. Determine whether an excessive forward thrust alarm will be issued in the operating state, as follows:

[0079] When N1 is less than the safety threshold of the forward thrust of the operation, where N1 is the change in the support force of the wall on the ladder, an alarm of excessive forward thrust of the operation will be issued.

[0080] S4. Determine whether an alarm of excessive left and right push and pull force will be issued during operation. The details are as follows:

[0081] When N2 left or N2 right is less than the safety threshold of the left and right push-pull forces during operation, where N2 left is the change in the support force given to the left vertical rod by the ground, and N2 right is the change in the support force given to the right vertical rod by the ground before and after the operation, an alarm for excessive left and right push-pull forces during operation will be issued.

[0082] During the operation, the data collected first, such as the pressure of the wall on the ladder, the supporting force of the ground on the ladder and the length of the ladder, are used to further analyze whether the ladder is overloaded, whether the climbing is too high, whether the forward thrust is too large, and whether the left and right push and pull forces are too large. If the ladder is overloaded, the climbing is too high, the forward thrust is too large, and the left and right push and pull forces are too large, an alarm will be triggered.

[0083] Example 3

[0084] Reference Figure 1 - Figure 5 , which is the third embodiment of the present invention, provides an intelligent safety risk alarm device for a ladder, the device includes a load-bearing component 100, including a ladder body 101 and a detection prompt member 102, the ladder body 101 is a device for detecting whether there is a risk when using it, and the detection prompt member 102 is arranged on the ladder body 101. The ladder body 101, that is, the ladder is divided into a straight ladder and a telescopic ladder.

[0085] Specifically, the ladder body 101 includes a left vertical rod 101a, a right vertical rod 101b symmetrically arranged to the left vertical rod 101a, and a telescopic foot 101c arranged on the left vertical rod 101a or the right vertical rod 101b. The telescopic foot 101c is arranged to make further adjustments when the ladder is set up on an uneven ground.

[0086] Further, the detection prompt member 102 includes an upper left pressure sensor 102a fixedly connected to the upper side of the left vertical rod 101a, a lower left supporting force sensor 102c fixedly connected to the lower side of the left vertical rod 101a, an upper right pressure sensor 102b fixedly connected to the upper side of the right vertical rod 101b, a lower right supporting force sensor 102d fixedly connected to the lower side of the right vertical rod 101b, and an alarm 102e fixedly installed on the left vertical rod 101a or the right vertical rod 101b. The pressure and supporting force values ​​of the ladder on the ground and the wall are detected by the upper left pressure sensor 102a, the upper right pressure sensor 102b, the lower left supporting force sensor 102c and the lower right supporting force sensor 102d, which can be marked as N1 left, N1 right, N2 left and N2 right respectively.

[0087] Among them, when the ladder is a straight ladder, the methods of Example 1 and Example 2 can be directly used to determine whether there is a behavioral hazard when the ladder is not in operation or in operation;

[0088] Among them, when the ladder is a telescopic ladder, the length of the ladder changes. The length of the ladder during operation can be obtained by the number of sections extended by the ladder. From this, it can be concluded that operations can be performed on a telescopic ladder and there are dangers in not operating.

[0089] During operation, before using the ladder, initial settings are performed, including calibrating the pressure sensor to ensure accurate readings. According to the specific model of the ladder and the data provided by the manufacturer, basic information such as the weight of the ladder and the length of each section is entered into the control system of the alarm device. The ladder is placed in the desired position, with one end of the ladder against the wall and the other end supported on the ground. Four sensors start working to detect the pressure and supporting force of the ladder on the ground and the wall, and the sensor data is transmitted to the control system of the alarm device in real time.

[0090] The signal processing module analyzes the sensor data, including pressure and support force, the inclination angle of the ladder, etc. For telescopic ladders, the current total length of the ladder is calculated by the number of sections extended by the ladder and the length of each section. Based on the sensor data and the length of the ladder, it is evaluated whether the ladder is in danger of behavior when not in operation or in operation. The evaluation criteria include but are not limited to overweight, excessive angle, uneven ground, excessive push and pull force, etc.

[0091] If the control system determines that there is a safety risk, the alarm 102e will sound an audible and visual alarm to prompt the staff to take immediate measures. The alarm 102e can be set with different alarm levels to distinguish different degrees of risks. After receiving the alarm prompt, the staff should check the position of the ladder, whether the number of telescopic sections is correct, and whether there are other factors that may cause risks. The staff can manually reset the alarm device to confirm that the risk has been eliminated.

[0092] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An intelligent safety risk alarm method for ladders, characterized in that: Including the following steps: After placing the ladder, make a certain safety judgment; after placing the ladder, collect data through the force detection component, specifically: The pressure of the wall on the ladder and the support of the ground on the ladder; The collected data is transmitted to the signal processing module to analyze whether the ladder is safe to use in the two modes, specifically: Whether the angle of the ladder exceeds the standard and the ground is uneven when there is no work; During operation, check whether the ladder is overloaded, whether the climbing height is too high, whether the forward thrust is too large, and whether the left and right push and pull forces are too large.

2. The intelligent safety risk alarm method for ladders according to claim 1, characterized in that: In the case of no operation, first determine whether it is empty, as follows: When (N2-N1×cos(arccot(N1 / G×L2 / L))) / sin(arccot(N1 / G×L2 / L))-G<no-load threshold, where N2 is the support force of the ground on the ladder, N1 is the pressure of the wall on the ladder, L is the length of the ladder, L2 is the distance from the center of gravity of the ladder to the ladder foot, and G is the weight of the ladder, the signal processing module determines that the ladder is in an no-load state, otherwise it is in an operating state.

3. The intelligent safety risk alarm method for ladders according to claim 2 is characterized in that: In the no-load state, determine whether the installation ground is uneven, as follows: When N2 left or N2 right is less than the safety pressure threshold of the unloaded left and right supporting feet, where N2 left is the pressure of the ground on the left vertical rod and N2 right is the pressure of the ground on the right vertical rod, an alarm for uneven erection ground will be issued.

4. The intelligent safety risk alarm method for ladders according to claim 2 or 3, characterized in that: In the no-load state, determine whether the erection angle exceeds the standard, as follows: When arccot(N1 / G×L2 / L)>the upper limit of the ladder setting angle threshold, or arccot(N1 / G×L2 / L)<the lower limit of the ladder setting angle threshold, where N1 is the pressure exerted by the wall on the ladder, L is the length of the ladder, L2 is the distance from the center of gravity of the ladder to the ladder foot, and G is the weight of the ladder, an alarm indicating that the ladder setting angle exceeds the limit will be issued.

5. The intelligent safety risk alarm method for ladders according to claim 4 is characterized in that: Determine whether there is overweight in the operating state, as follows: When (△N2-△N1×cos(θ)) / sin(θ)>ladder load threshold, where θ is the inclination angle between the ladder and the ground, △N2 is the change in the ground support force given to the ladder before and after the operation, and △N1 is the change in the wall support force given to the ladder before and after the operation, an overweight alarm will be issued.

6. The intelligent safety risk alarm method for ladders according to claim 5, characterized in that: Determine whether there is excessive climbing height during operation, as follows: When (1-(ΔN2 / ΔN1 / cos(θ)-1)×cot(θ)^2)×L<1, θ is the inclination angle between the ladder and the ground, ΔN2 is the change in the ground support force given to the ladder before and after the operation, ΔN1 is the change in the wall support force given to the ladder before and after the operation, and L is the length of the ladder. At this time, an over-height alarm is issued.

7. The intelligent safety risk alarm method for ladders according to claim 6, characterized in that: Determine whether an excessive thrust alarm will be issued during operation, as follows: When N1 is less than the safety threshold of the forward thrust of the operation, where N1 is the support force given to the ladder by the wall before and after the operation, an alarm of excessive forward thrust of the operation will be issued; when N2 left or N2 right is less than the safety threshold of the left and right push-pull force of the operation, where N2 left is the support force given to the left vertical rod by the ground before and after the operation, and N2 right is the support force given to the right vertical rod by the ground before and after the operation, an alarm of excessive left and right push-pull force of the operation will be issued.

8. An intelligent safety risk alarm device for ladders, characterized in that: The force detection component according to any one of claims 1 to 7 comprises: The load-bearing assembly (100) comprises a ladder body (101) and a detection prompting member (102). The ladder body (101) is a device for indicating whether there is a risk when in use, and the detection prompting member (102) is arranged on the ladder body (101).

9. The intelligent safety risk alarm device for ladders according to claim 8, characterized in that: The ladder body (101) comprises a left vertical rod (101a), a right vertical rod (101b) symmetrically arranged with respect to the left vertical rod (101a), and a telescopic foot (101c) arranged on the left vertical rod (101a) or the right vertical rod (101b).

10. The intelligent safety risk alarm device for ladders according to claim 9, characterized in that: The detection prompting member (102) comprises an upper left pressure sensor (102a) fixedly connected to the upper side of the left vertical rod (101a), a lower left supporting force sensor (102c) fixedly connected to the lower side of the left vertical rod (101a), an upper right pressure sensor (102b) fixedly connected to the upper side of the right vertical rod (101b), a lower right supporting force sensor (102d) fixedly connected to the lower side of the right vertical rod (101b), and an alarm (102e) arranged on the left vertical rod (101a) or the right vertical rod (101b).

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