Elevator operation status monitoring methods

Abstract

This invention provides a method for monitoring elevator operation status, relating to the technical field of elevators, and includes the following steps: monitoring risk points within the elevator and converting the risk point status information into safety factors; assessing the risk level of each safety factor using an index system method to determine the risk level of each risk point in the elevator; defining the contribution value of each risk point to the risk assessment of the elevator based on the degree of influence of each risk point; and combining the contribution value of each risk point with usage information to form an elevator risk occurrence probability model, thereby determining whether there is a probability of danger occurring during use. This alleviates the technical problems of existing technologies that cannot prevent elevator safety issues and cannot handle accidents in a timely manner, achieving the technical effect of preventing elevator safety issues and predicting and handling accidents in a timely manner.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to a method for monitoring elevator operation status. Background Technology

[0002] The Special Equipment Catalog defines elevators as follows: Elevators are electromechanical equipment that are power-driven and use a car that runs along a rigid guide rail or steps that run along a fixed route to lift or transport people or goods in parallel, including vertical elevators, escalators, moving walkways, etc.

[0003] In recent years, with the rapid pace of urbanization in my country and the emergence of numerous high-rise buildings, elevators have become an indispensable vertical transportation tool in modern cities, increasingly favored by residents. Due to their height, safety has become a growing concern, necessitating regular inspections and maintenance of elevators.

[0004] However, regular manual inspections of elevators cannot provide real-time updates on the traction system's operational status, making it impossible to prevent or address elevator safety incidents promptly. This can lead to untimely maintenance, safety hazards, and increased risks for users. Summary of the Invention

[0005] The purpose of this invention is to provide an elevator operation status monitoring method to alleviate the technical problems existing in the prior art, which are unable to prevent elevator safety issues and cannot handle accidents in a timely manner.

[0006] The elevator operation status monitoring method provided by this invention includes the following steps: Monitor risk points inside the elevator and convert the risk point status information into a safety factor; Each safety factor is assessed for risk level using an indicator system method; Based on the degree of impact of each risk point, the contribution value of each risk point to the risk assessment of the elevator is defined; The contribution value of each risk point is combined with the information to form an elevator risk probability model.

[0007] In an optional implementation, the step of converting risk point status information into a safety factor includes: The higher the safety factor, the more dangerous it is; the lower the value, the safer it is. The safety factor K is calculated as follows: ; In the formula, N is the actual value of the risk point, and H is the standard value of the risk point.

[0008] In an optional implementation, the step of assessing the risk level of each safety factor using an index system method includes: Risk levels are divided into four levels: Level 1, Level 2, Level 3, and Level 4. K≤50% is Level 1; 50% < K ≤ 100% is Level 2; 100% < K < 150% is Level 3; K≥150% is level 4.

[0009] In an optional implementation, the step of monitoring risk points inside the elevator includes: Risk points include temperature and humidity inside the elevator shaft, power, current, voltage, traction machine speed, temperature, tension, and vibration frequency during traction system operation.

[0010] In an optional implementation, the step of defining the contribution value of each risk point to the risk assessment of the elevator includes: The contribution value C of the safety coefficient for each Level 1 risk point is 0.1, the contribution value C of the safety coefficient for each Level 2 risk point is 0.5, the contribution value C of the safety coefficient for each Level 3 risk point is 2.5, and the contribution value C of the safety coefficient for each Level 4 risk point is 10.

[0011] In an optional implementation, the step of defining the contribution value of each risk point to the risk assessment of the elevator further includes: The relationship between the contribution value W of each risk point, the contribution value C of the safety factor of each risk point, and the importance value I of each risk point is as follows: ; Among them, the importance value I of the risk point is greater than or equal to 1. The importance value I of the risk point is divided according to the importance of the risk point to the elevator. The more important the risk point is to the elevator safety, the larger the I value is, and the less important the risk point is to the elevator safety, the smaller the I value is.

[0012] In an optional implementation, a standard value W1 is set for the contribution value W of each risk point; When W < 50%W1, an alarm will be triggered on the screen, the loudspeaker will sound, and a safety warning will be issued into the elevator. The risk point will be displayed in red. When 50%W1≤W<80%W1, an alarm will be triggered on the screen, and the risk point will be displayed in yellow. When 80%W1≤W<120%W1, no alarm is triggered on the screen, and the risk point is displayed in green; When 120%W1≤W<150%W1, an alarm will be triggered on the screen, and the risk point will be displayed in yellow. When W≥150%W1, an alarm will be triggered on the screen, an announcement will be made through the loudspeaker, and a safety warning will be issued into the elevator. The risk point will be displayed in red.

[0013] In an optional implementation, the usage information includes: The frequency of elevator use, the frequency of elevator maintenance, the number of times the elevator has been overloaded, and the overload value of the elevator.

[0014] In an optional implementation, the elevator's usage frequency ranges from daily usage, the elevator's maintenance frequency includes monthly maintenance, the elevator's overload frequency includes daily overload, and the elevator's overload value exceeds the elevator's load capacity.

[0015] In an optional implementation, the step of combining the contribution value of each risk point with the information to form an elevator risk occurrence probability model includes: Based on information and experience, we can determine which risk points have a higher risk level and infer and simulate the probability of risk occurrence to prevent risks from happening in advance.

[0016] The elevator operation status monitoring method provided by this invention includes the following steps: monitoring risk points inside the elevator and converting the risk point status information into safety factors; assessing the risk level of each safety factor using an index system method to determine the risk level of each risk point in the elevator; defining the contribution value of each risk point to the risk assessment of the elevator based on the degree of influence of each risk point; and combining the contribution value of each risk point with usage information to form an elevator risk occurrence probability model to determine whether there is a probability of danger during use. This alleviates the technical problems of existing technologies that cannot prevent elevator safety and cannot handle accidents in a timely manner, achieving the technical effect of being able to prevent elevator safety and predict and handle accidents in a timely manner. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A flowchart of an elevator operation status monitoring method provided in an embodiment of the present invention. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Currently, relying on manual periodic elevator inspections is insufficient to monitor the real-time operating status of the traction system. This makes it impossible to prevent and address elevator safety incidents promptly, leading to untimely maintenance, safety hazards, and increased risks for users.

[0021] like Figure 1 As shown, the elevator operation status monitoring method provided in this embodiment of the invention includes the following steps: monitoring risk points inside the elevator and converting the risk point status information into safety factors; assessing the risk level of each safety factor using an index system method to determine the risk level of each risk point in the elevator; defining the contribution value of each risk point to the risk assessment of the elevator based on the degree of influence of each risk point; combining the contribution value of each risk point with usage information to form an elevator risk occurrence probability model, thereby determining whether there is a probability of danger occurring during use, so as to alleviate the technical problems existing in the prior art that cannot prevent elevator safety and cannot handle accidents in a timely manner, achieving the technical effect of being able to prevent elevator safety and predict and handle accidents in a timely manner.

[0022] Optional risk points include the temperature and humidity inside the elevator shaft, and the power, current, voltage, traction machine speed, temperature, tension, and vibration frequency during the operation of the traction system. Specifically, a thermometer and hygrometer can be installed inside the elevator shaft and connected to a computer to transmit the temperature and humidity data in real time. For the traction system, the current and voltage during operation can be detected and synchronously transmitted to the computer. A thermometer can be installed on the traction machine and connected to the computer so that the temperature of the traction machine can be transmitted to the computer in real time. The speed and tension of the traction machine can be directly transmitted to the computer via electrical signals. The vibration frequency of the traction machine can also be measured by a vibration detection module installed on the traction machine and transmitted to the computer.

[0023] Optionally, risk points can also include the braking time of the car and the decibel level in the elevator shaft. A decibel meter can be installed in the elevator shaft and connected to a computer to measure the decibel level in the elevator shaft. At the same time, the time from braking to stopping of the car can also be detected and transmitted to the computer. Risk points can also include the position accuracy of the car and the elevator doors on each floor. The car can be judged to be stable and accurate by the corresponding position between the car and each elevator door. The standard for judging whether the elevator stops accurately is to evaluate the distance between the sensor on the car and the elevator door on each floor.

[0024] In the step of converting each piece of information in the risk points into a safety factor, the safety factor K is calculated as follows: ; In the formula, N is the actual value of the risk point, and H is the standard value of the risk point. That is to say, in the process of calculating the temperature in the elevator shaft, the actual measured temperature N is compared with the standard value temperature H, and then the safety factor K of the temperature is calculated. At the same time, the standard values ​​of temperature and humidity can be set according to altitude and season to adapt to more usage scenarios and ranges. Correspondingly, the safety factor of parameters such as humidity in the elevator shaft, power, current, voltage, traction machine speed, temperature, tension and vibration frequency during operation of the traction system can all be calculated according to the temperature calculation method. Among them, the temperature in the elevator shaft can be used to determine whether there is a fire and whether there is overheating of parts. Humidity can be used to determine whether there is water ingress in the elevator shaft, whether parts are easily corroded, and whether there is a risk of short circuit. The power, current and voltage of the traction system during operation can be used to see whether the elevator is running smoothly and whether there are any problems with the circuit. The traction machine speed, temperature, tension and vibration frequency can be used to see whether the traction machine is working smoothly and whether there is overload or insufficient traction. Thus, the operating status of the elevator can be detected from multiple angles to avoid elevator danger.

[0025] Regarding the contribution value of the safety factor for risk points, the contribution value of a single Level 1 risk point is 10, a single Level 2 risk point is 1.5, a single Level 3 risk point is 2.5, and a single Level 4 risk point is 10. Since the range for Level 1 risk points is K≤50%, when the actual measured safety factor is less than or equal to 50%, it means that the actual value N of the risk point is much smaller than the standard value H. In this case, an excessively low actual value N for the risk point may lead to traction system abnormalities, such as no tension or no rotation within the traction machine. Therefore, the contribution value of the safety factor for Level 1 risk points is relatively high. For individual Level 2 and Level 3 risk points, since 50%<K≤100% is Level 2, and 100%<K<150% is Level 3... Level 3 risk points are defined as follows: when the actual value N of a risk point equals the standard value H, K = 100%. Therefore, fluctuations around the standard value are acceptable, resulting in contribution values ​​of 1.5 and 2.5. Since Level 3 risk points exceed 100%, their safety factor contribution is higher than that of Level 2. Level 4 risk points have a safety factor contribution of 10 when K ≥ 150%. In this case, the actual value N of the risk point is much greater than the standard value H. An excessively high actual value N could lead to traction system malfunctions, such as excessive tension (overload or malfunction), excessively high traction machine speed (dangerous), excessively high temperature (fire), or excessively high humidity (short circuit).

[0026] Furthermore, the contribution value W of each risk point is equal to the contribution value of the safety factor of each risk point multiplied by the importance value I of the risk point. The importance value I of a risk point is determined by its impact on the overall elevator safety; the more important a risk point is to elevator safety, the larger its I value, and vice versa. Factors such as humidity in the elevator shaft, power, current, voltage, traction machine speed, temperature, tension, and vibration frequency during traction system operation can be considered. The power, current, and voltage of the traction system during operation are ranked from largest to smallest according to I. The traction machine speed corresponds to I=10, temperature I=9, tension I=8, vibration frequency I=7, temperature inside the elevator shaft I=6, humidity I=5, power of the traction system during operation I=4, current I=3, and voltage I=2. A standard value W1 is set for the contribution value W of each risk point. Because the importance value I of each risk point is inconsistent, when the safety factor K of each risk point changes, or when the contribution value C of the safety factor of the risk point changes, because... The corresponding value W also changes accordingly. When W < 50%W1, an alarm occurs on the screen, the loudspeaker sounds, and a safety warning is issued to the elevator. The risk point is displayed in red. When 50%W1 ≤ W < 80%W1, an alarm occurs on the screen, and the risk point is displayed in yellow. When 80%W1 ≤ W < 120%W1, no alarm occurs on the screen, and the risk point is displayed in green. When 120%W1 ≤ W < 150%W1, an alarm occurs on the screen, and the risk point is displayed in yellow. When W ≥ 150%W1, an alarm occurs on the screen, the loudspeaker sounds, and a safety warning is issued to the elevator. The risk point is displayed in red.

[0027] Optionally, the usage information includes daily elevator usage data, such as usage frequency, maintenance frequency, number of overloads, and overload values. Usage frequency is measured daily, maintenance frequency includes monthly maintenance, and overload counts include daily overloads. An overload value exceeding the elevator's load capacity is considered an overload. This information is transmitted to a computer and, in conjunction with data on humidity levels in the elevator shaft, power, current, voltage, traction machine speed, temperature, tension, and vibration frequency during traction system operation, to determine the elevator's operating status. For example, in cases of elevator overload, priority is given to traction machine speed, tension, and temperature, as well as traction system power, current, and voltage. Similarly, in cases of frequent overloads, priority is given to traction machine speed. The parameters to be monitored include tension, temperature, and the power, current, and voltage of the traction system. Additionally, the frequency of monthly maintenance should be increased. If a component requires maintenance during the month, such as a traction machine failure, the traction machine's status should be prioritized. The critical values ​​(I) for risk points related to the traction machine's speed, tension, and temperature can be appropriately increased to prevent recurrence of risks. Furthermore, elevator maintenance is crucial. Elevators can be scheduled for two maintenance sessions per month, or maintenance every 15 days. Failure to maintain in a timely manner can trigger an alarm in the computer system. A countdown timer can also be implemented for elevator maintenance; maintenance items can be highlighted in yellow as the countdown nears its end, and highlighted in red when the maintenance reaches its limit.

[0028] The steps for combining the contribution value of each risk point with information to form an elevator risk occurrence probability model include: judging which risk points have a higher risk based on the information and experience, and inferring and simulating the risk occurrence probability model to prevent the occurrence of risks in advance.

[0029] For example, by considering the frequency of elevator use, the frequency of elevator maintenance can be controlled. When the elevator is used too frequently, the maintenance frequency can be shortened. For instance, if an elevator operates for more than 200 times a day for two consecutive days, the maintenance interval should be shortened by one day, and it can be changed to maintenance once every 14 days. At the same time, the decibel level in the car and elevator shaft, as well as parameters such as the speed, tension, and temperature of the traction machine, should be monitored. The importance value I corresponding to the speed, tension, and temperature of the traction machine should be increased, giving it a greater weight. When the elevator is used too frequently, the contribution value W of the decibel level in the elevator shaft, the speed, tension, and temperature of the traction machine should be given more attention, and these should be the key monitoring targets.

[0030] Meanwhile, the probability of a risk occurring can be determined by the value of W. When 50%W1≤W<80%W1, an alarm is triggered on the screen, and the risk point is displayed in yellow. When 80%W1≤W<120%W1, no alarm is triggered on the screen, and the risk point is displayed in green. When 120%W1≤W<150%W1, an alarm is triggered on the screen, and the risk point is displayed in yellow. When W≥150%W1, an alarm is triggered on the screen, a loudspeaker sounds, and a safety warning is issued into the elevator, and the risk point is displayed in red. When a risk point is displayed in yellow, if the value of W continues to deviate from W1, the risk point is continuously worsening, and personnel can be notified to handle it via an alarm.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring elevator operation status, characterized in that, Includes the following steps: Monitor risk points inside the elevator and convert the risk point status information into a safety factor; Each safety factor is assessed for risk level using an indicator system method; Based on the degree of impact of each risk point, the contribution value of each risk point to the risk assessment of the elevator is defined; The contribution value of each risk point is combined with the information to form an elevator risk occurrence probability model; The step of converting risk point status information into a safety factor includes: the larger the safety factor value, the more dangerous the situation; the smaller the value, the safer the situation. The safety factor K is calculated as follows: In the formula, N is the actual value of the risk point, and H is the standard value of the risk point; The steps for assessing the risk level of each safety factor using the index system method include: dividing the risk point level into level 1, level 2, level 3 and level 4, where: K≤50% is level 1; 50%<K≤100% is level 2; 100%<K<150% is level 3; K≥150% is level 4; The steps for monitoring risk points inside the elevator include: risk points include temperature and humidity inside the elevator shaft, power, current, voltage, traction machine speed, temperature, tension, and vibration frequency during the operation of the traction system; The steps for defining the contribution value of each risk point to the elevator risk assessment further include: the relationship between the contribution value W of each risk point, the contribution value C of the safety factor of each risk point, and the importance value I of the risk point is as follows: Among them, the importance value I of the risk point is greater than or equal to 1. The importance value I of the risk point is divided according to the importance of the risk point to the elevator. The more important the risk point is to the elevator safety, the larger the I value is, and the less important the risk point is to the elevator safety, the smaller the I value is.

2. The elevator operation status monitoring method according to claim 1, characterized in that, The steps for defining the contribution value of each risk point to the risk assessment of the elevator include: The safety coefficient contribution value of each Level 1 risk point is 10, the safety coefficient contribution value of each Level 2 risk point is 1.5, the safety coefficient contribution value of each Level 3 risk point is 2.5, and the safety coefficient contribution value of each Level 4 risk point is 10.

3. The elevator operation status monitoring method according to claim 1, characterized in that, Set a standard value W1 for the contribution value W of each risk point; When W < 50%W1, an alarm will be triggered on the screen, the loudspeaker will sound, and a safety warning will be issued into the elevator. The risk point will be displayed in red. When 50%W1≤W<80%W1, an alarm will be triggered on the screen, and the risk point will be displayed in yellow. When 80%W1≤W<120%W1, no alarm is triggered on the screen, and the risk point is displayed in green; When 120%W1≤W<150%W1, an alarm will be triggered on the screen, and the risk point will be displayed in yellow. When W≥150%W1, an alarm will be triggered on the screen, an announcement will be made through the loudspeaker, and a safety warning will be issued into the elevator. The risk point will be displayed in red.

4. The elevator operation status monitoring method according to claim 1, characterized in that, The usage information includes: The frequency of elevator use, the frequency of elevator maintenance, the number of times the elevator has been overloaded, and the overload value of the elevator.

5. The elevator operation status monitoring method according to claim 4, characterized in that, The elevator's usage frequency ranges from daily usage, its maintenance frequency includes monthly maintenance, its overload frequency includes daily overload, and the overload value of the elevator exceeds its load capacity.

6. The elevator operation status monitoring method according to any one of claims 1-5, characterized in that, The steps of combining the contribution value of each risk point with the information to form an elevator risk occurrence probability model include: Based on information and experience, we can determine which risk points are high-risk and infer and simulate the probability of risk occurrence to prevent risks from happening in advance.

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