An improved elevator balance coefficient rapid detection method and system

Abstract

The application provides an improved elevator balance coefficient rapid detection method and system, relates to the elevator parameter determination technical field, and solves the technical problem that the prior art cannot simultaneously consider high-precision and rapid automatic detection of the elevator balance coefficient. The method specifically comprises the following steps: obtaining elevator operation parameters; the elevator operation parameters comprise a first power, a second power of an elevator driving motor, a first running speed, a second running speed of the elevator, and a rated load Q; and the balance coefficient is calculated based on the elevator operation parameters, wherein, is a resistance coefficient, is a driving motor forward efficiency, is a driving motor reverse efficiency, and is a gravitational acceleration. The application is used for detecting the elevator balance coefficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator parameter measurement, and in particular to an improved elevator balance coefficient rapid detection method and system. BACKGROUND

[0002] The elevator balance coefficient is a key parameter for ensuring the safe and stable operation of the elevator and improving the operation efficiency. Its accurate detection is crucial for elevator maintenance and safety control. The current industry mainstream elevator balance coefficient detection methods include: the load-current curve diagram method specified in GB / T10059-2023, which requires the car to be loaded with 30%, 40%, 45%, 50%, and 60% of the rated load, respectively, to measure the current when the car and the counterweight are at the same horizontal position during up and down operation, and then determine the balance coefficient by drawing the current-load curve and the intersection point of the up and down operation curves; T-CASE IT101-2015 proposes a secondary loading current method and a no-load power method, wherein the secondary loading current method requires loading 40% and 50% of the rated load in the car to measure the operating current under the corresponding working conditions and calculate the balance coefficient through a formula, and the no-load power method calculates the balance coefficient by measuring the power and speed of the elevator when it is running empty, combined with the functional relationship of power, speed, and load; the existing technology CN202011155882.0 discloses an improvement on the secondary loading current method, replacing part of the load test with a no-load test, but still requires a load test, and the method disclosed in the existing technology CN202411025676.6 is essentially a no-load power method, which relies on the elevator comprehensive transmission efficiency parameter that is difficult to accurately obtain.

[0003] However, the load-current curve diagram method requires repeatedly moving the elevator load, which is labor-intensive and time-consuming; the secondary loading current method reduces the number of loadings, but still requires manual loading and cannot be automatically triggered by software, which requires high technical requirements for the detection personnel; the no-load power method has large calculation errors due to the neglect of motor efficiency, elevator system friction, and other factors, and its detection accuracy is affected because it relies on the comprehensive efficiency parameter that is difficult to accurately obtain. Therefore, the existing technology has the technical problem of being difficult to balance the high precision and rapid automatic detection of the elevator balance coefficient. SUMMARY

[0004] The present application provides an improved elevator balance coefficient rapid detection method and system, which solves the technical problem of the existing technology that is difficult to balance the high precision and rapid automatic detection of the elevator balance coefficient.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, an improved elevator balance coefficient rapid detection method is provided, comprising: obtaining elevator operation parameters; the parameters include the first power , the second power , the first running speed of the elevator , the second running speed , the rated load Q; calculating the balance coefficient based on the elevator running parameters , wherein q is the balance coefficient of the elevator, is the resistance coefficient of the elevator, is the forward efficiency of the elevator drive motor, is the reverse efficiency of the elevator drive motor, is the acceleration of gravity.

[0007] In combination with the above first aspect, in a possible implementation manner, the first running speed , the first power is the speed and the active power of the drive motor when the elevator runs at a constant speed to 1 / 2 of the shaft under the condition of empty car; the second running speed , the second power is the speed and the active power of the drive motor when the elevator runs at a constant speed to 1 / 2 of the shaft under the condition of empty car.

[0008] In combination with the above first aspect, in a possible implementation manner, the elevator running parameters are acquired, including: the first running speed , the second running speed is measured by the elevator speed measuring device; the first power , the second power of the drive motor is determined by the motor power measuring device; the elevator runs at a constant speed to 1 / 2 of the shaft is determined by the car position measuring device; the balance coefficient is calculated by the balance coefficient calculation device.

[0009] In combination with the above first aspect, in a possible implementation manner, the balance coefficient is calculated, including: a first equation is established based on the elevator mechanical model of the traction system force balance according to the elevator running parameters; the first equation satisfies: , wherein F is the running resistance of the elevator; the running resistance F is the sum of the guide shoe friction resistance of the car and the counterweight, the friction resistance of the steel wire rope and the traction sheave, and the wind resistance; a second equation is established based on the elevator mechanical model according to the elevator running parameters; the second equation satisfies: ; the balance coefficient calculation expression is obtained based on the first equation and the second equation.

[0010] In combination with the above first aspect, in a possible implementation manner, the balance coefficient calculation expression is obtained based on the first equation and the second equation, including: the first running speed and the second running speed are controlled based on the elevator variable frequency drive system; the product of the first equation and the second equation is calculated, the product expression is obtained, and the resistance coefficient The product expression is brought in to obtain the balance coefficient calculation expression.

[0011] In combination with the first aspect, in a possible implementation manner, the product expression satisfies the following formula:

[0012]

[0013] wherein, .

[0014] In combination with the first aspect, in a possible implementation manner, the resistance coefficient K is 5% to 10%.

[0015] In combination with the first aspect, in a possible implementation manner, after the balance coefficient is calculated, the value of the resistance coefficient K satisfies the following process: if the elevator drive motor is a permanent magnet synchronous traction machine, the forward efficiency is equal to the reverse efficiency , the value is 1; if the elevator drive motor is an asynchronous motor, the ratio of the forward efficiency to the reverse efficiency is obtained based on the configuration of the reduction gearbox.

[0016] In combination with the first aspect, in a possible implementation manner, the specific value of the resistance coefficient K satisfies the following rules: when the elevator adopts sliding shoes, K is preferably 10%; when the elevator adopts rolling shoes, K is preferably 5%; in the case where the system configuration is not clear, K is preferably 8%.

[0017] Secondly, an improved elevator balance coefficient rapid detection system is provided, comprising: a motor power measuring device, an elevator speed measuring device, a car position measuring device, and a balance coefficient calculation device; the motor power measuring device is used to measure the first power of the drive motor when the elevator runs at a constant speed to the 1 / 2 balance coefficient calculation position of the shaft under the condition of empty load of the car, and measure the second power of the drive motor when the elevator runs at a constant speed to the 1 / 2 balance coefficient calculation position of the shaft under the condition of empty load of the car; the elevator speed measuring device is used to measure the first running speed of the car when the elevator runs at a constant speed to the 1 / 2 balance coefficient calculation position of the shaft under the condition of empty load of the car, and measure the second running speed of the car when the elevator runs at a constant speed to the 1 / 2 balance coefficient calculation position of the shaft under the condition of empty load of the car; the car position measuring device is used to identify whether the car runs to the 1 / 2 balance coefficient calculation position of the shaft during the process of empty load down and empty load up, and provide position judgment basis for the motor power measuring device to trigger the measurement of the first power and the second power, and for the elevator speed measuring device to trigger the measurement of the first running speed and the second running speed; the balance coefficient calculation device is used to calculate the balance coefficient.

[0018] Thirdly, this application provides an improved rapid detection device for elevator balance coefficient, comprising: a communication unit and a processing unit; the communication unit is used to acquire elevator operating parameters; the parameters include the first power of the elevator drive motor. Second power The elevator's first running speed Second operating speed The rated load Q; the processing unit is used to calculate the balance coefficient based on the elevator operating parameters. Where q is the elevator balance coefficient. This is the elevator's resistance coefficient. This refers to the positive efficiency of the elevator drive motor. This refers to the reverse efficiency of the elevator drive motor. This is the acceleration due to gravity.

[0019] Fourthly, this application provides an improved elevator balance coefficient rapid detection device, comprising: a processor and a storage medium; the storage medium includes instructions, and the processor is configured to execute the instructions to implement the method described in the first aspect and any possible implementation thereof. This improved elevator balance coefficient rapid detection device may be an electronic device or a chip within an electronic device.

[0020] Fifthly, this application provides a computer-readable storage medium storing instructions that, when executed on an improved elevator balance coefficient rapid detection device, cause the improved elevator balance coefficient rapid detection device to perform the method described in the first aspect and any possible implementation thereof.

[0021] Sixthly, this application provides a computer program product containing instructions that, when run on an improved elevator balance coefficient rapid detection device, cause the improved elevator balance coefficient rapid detection device to perform the methods described in the first aspect and any possible implementation thereof.

[0022] This application provides an improved method and device for rapid detection of elevator balance coefficient. It can automatically collect the active power of the drive motor and the car running speed when the elevator is running at a constant speed during the downward and upward movements to the 1 / 2 position of the hoistway without manual loading under the condition of car empty load. Then, based on the force balance model of the traction system, an equation is established, and the resistance coefficient K is used to replace the running resistance F which is difficult to measure accurately. Combined with the forward and reverse efficiency optimization calculation logic of the elevator system, the automatic rapid detection and high-precision calculation of elevator balance coefficient can be achieved.

[0023] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0024] Figure 1 A system architecture diagram of an improved rapid elevator balance coefficient detection system provided in this application embodiment;

[0025] Figure 2 A flowchart illustrating an improved rapid detection method for elevator balance coefficient provided in this application embodiment;

[0026] Figure 3 A flowchart illustrating another improved method for rapid detection of elevator balance coefficient provided in this application embodiment;

[0027] Figure 4 A schematic diagram of an improved elevator balance coefficient rapid detection device provided in an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the hardware structure of an improved elevator balance coefficient rapid detection device provided in an embodiment of this application. Detailed Implementation

[0029] In the description of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. The terms "first," "second," etc., do not limit the quantity or order of execution, and "first," "second," etc., do not necessarily imply differences.

[0030] It should be noted that, in this application, the terms "exemplary" or "for example" are used to indicate that something is being described as an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0031] The improved rapid detection method for elevator balance coefficient provided in this application embodiment can be applied to, for example... Figure 1 The improved elevator balance coefficient rapid detection system shown includes: a motor power measuring device 11, an elevator speed measuring device 12, a car position measuring device 13, and a balance coefficient calculation device 14.

[0032] The motor power measuring device 11 is used to measure the first power of the drive motor when the elevator is running at a constant speed downwards to the position of the balance coefficient to be calculated in the hoistway under empty car conditions, and to measure the second power of the drive motor when the elevator is running at a constant speed upwards to the position of the balance coefficient to be calculated in the hoistway; the elevator speed measuring device 12 is used to measure the first running speed of the car when the elevator is running at a constant speed downwards to the position of the balance coefficient to be calculated in the hoistway under empty car conditions, and to measure the second running speed of the car when the elevator is running at a constant speed upwards to the position of the balance coefficient to be calculated in the hoistway; the car position measuring device 13 is used to identify whether the car has reached the position of the balance coefficient to be calculated in the hoistway during empty downward and empty upward movements. The system provides a position determination basis for the motor power measuring device to trigger the measurement of the first power and the second power, and for the elevator speed measuring device to trigger the measurement of the first running speed and the second running speed. The balance coefficient calculation device 14 is used to establish a first equation between the balance coefficient to be calculated, the balance coefficient to be calculated for the rated load, the running resistance and the first running speed and the first power, based on the elevator mechanical model of the traction system force balance. It also establishes a second equation between the balance coefficient to be calculated, the balance coefficient to be calculated for the rated load, the balance coefficient to be calculated for the running resistance F and the second running speed and the second power. It is also used to make the first running speed and the second running speed equal, and replace the running resistance with the resistance coefficient to obtain the balance coefficient calculation equation. At the same time, it is used to calculate the balance coefficient by changing the magnitude of the resistance coefficient based on different types of elevators. In addition to the improved elevator balance coefficient rapid detection system, device 2 is the traction machine, i.e. the elevator drive motor, device 3 is the counterweight, and device 4 is the car. The two are connected to the steel wire rope via the traction machine. When device 13 identifies that the car 4 and the counterweight 3 have run to the 1 / 2 position of the hoistway (at the same level), it triggers devices 11 and 12 to collect the first power and second power of the drive motor, the first running speed and the second running speed of the car, and then device 14 calculates the balance coefficient based on the elevator operating parameters.

[0033] To address the technical challenge of achieving both high accuracy and rapid automatic detection of elevator balance coefficients in existing technologies, this application provides an improved method for rapid elevator balance coefficient detection. This method includes: acquiring elevator operating parameters; and calculating the balance coefficient based on the elevator operating parameters. Based on this, this application eliminates the need for manual loading of the elevator load. Data acquisition is automatically completed through motor power measurement devices, elevator speed measurement devices, and car position measurement devices built into the elevator control system and frequency converter, enabling one-click triggering of detection and meeting the requirements for rapid automation. Simultaneously, through precise modeling of the traction system force balance model, optimized resistance coefficient characterization of operating resistance, and forward and reverse efficiency adaptation calculations, the interference of efficiency and resistance on the results is effectively reduced, ensuring detection accuracy. This solves the technical problem of achieving both high accuracy and rapid automatic detection of elevator balance coefficients in existing technologies.

[0034] Figure 2 A flowchart illustrating the improved rapid detection method for elevator balance coefficient provided in this application embodiment is shown below. Figure 2 As shown, the method includes:

[0035] S201. Obtain elevator operating parameters.

[0036] Among these parameters is the first power of the elevator drive motor. Second power The elevator's first running speed Second operating speed The rated load Q; the first power and the first running speed are the active power of the drive motor and the car running speed when the elevator is running at a constant speed downwards to the 1 / 2 position of the shaft under the condition that the car is empty, that is, when the car and the counterweight are running at the same horizontal position; the second power and the second running speed are the active power of the drive motor and the car running speed when the elevator is running at a constant speed upwards to the 1 / 2 position of the shaft under the condition that the car is empty; the rated load Q is the maximum load capacity specified in the elevator design.

[0037] In this embodiment, the improved elevator balance coefficient rapid detection system calls the built-in motor power measuring device, elevator speed measuring device, and car position measuring device to perform parameter acquisition. The car position measuring device identifies the car position in real time. When it detects that the car is unloaded and descending or ascending to the 1 / 2 position of the hoistway and is in a constant speed running state, it triggers the motor power measuring device to collect the first power and second power of the drive motor, and at the same time triggers the elevator speed measuring device to collect the first running speed and second running speed of the car. The rated load Q is directly retrieved from the equipment parameters pre-stored in the system.

[0038] It should be noted that parameter acquisition should be limited to the conditions of no-load uniform speed and 1 / 2 position in the shaft. No-load can avoid the tediousness of manually loading the elevator load, and uniform speed operation and specific position can eliminate the interference of speed fluctuation and position deviation on power and speed measurement. In addition, the acquisition of active power should exclude the influence of reactive power to ensure the accuracy of parameters.

[0039] As an example, for an elevator with a rated load of Q=1050kg, when the car descends from the top floor to the bottom floor unloaded, and the car position measuring device detects that the car and the counterweight are at the same level and the speed is stable at 1.75m / s, the motor power measuring device collects the first power of 11461W; subsequently, when the car ascends from the bottom floor to the top floor unloaded, the speed at the same position is stable at 1.751m / s, and the motor power measuring device collects the second power of -6444W (the negative sign indicates the power generation condition).

[0040] Based on the above steps, the core parameters required for subsequent calculations can be obtained automatically without manual intervention, which reduces errors caused by manual operation and saves parameter acquisition time.

[0041] S202. Calculate the balance coefficient based on elevator operating parameters.

[0042] Among them, the balance coefficient q is the elevator balance coefficient. This is the elevator's resistance coefficient. This refers to the positive efficiency of the elevator drive motor. This refers to the reverse efficiency of the elevator drive motor. This is the acceleration due to gravity.

[0043] In this embodiment of the application, the improved elevator balance coefficient rapid detection system calls the built-in balance coefficient calculation device to calculate the balance coefficient.

[0044] Based on the above steps, the obtained elevator operation data can be used to construct a formula for calculating the balance coefficient. Combined with elevator type adaptation parameters, this avoids errors from manual calculations and ensures the reliability of results under different scenarios.

[0045] Based on the above technical solution, by automatically collecting core parameters and accurately calculating the balance coefficient, the rapid automatic detection and high-precision calculation of the elevator balance coefficient are realized without manual loading and complex operations, effectively solving the problem that existing technologies cannot balance efficiency and accuracy.

[0046] In one possible approach, combining the above... Figure 2 ,like Figure 3 As shown, the specific process of calculating the balance coefficient based on elevator operating parameters in S202 can be implemented through the following S301-S304:

[0047] S301. Based on the elevator operating parameters, establish the first equation using the elevator mechanical model based on the force balance of the traction system.

[0048] Among them, the elevator mechanical model for force balance of the traction system is constructed based on the force balance relationship of the car and counterweight during operation, and the effects of gravity and running resistance need to be considered; the running resistance F is the sum of the frictional resistance of the guide shoes, the frictional resistance of the wire rope and the traction sheave, and the wind resistance during the operation of the car and the counterweight; the first equation is the mathematical expression of the measured power on the motor side and the mechanical power on the hoistway side.

[0049] In this embodiment, the system first establishes an equation relating the balance coefficient q to be calculated, the rated load Q, the running resistance F, the first running speed, and the downhill power of the hoistway based on the traction system force balance model. The downhill power of the hoistway is the sum of the work done by the unbalanced gravity of the car and the counterweight and the work done by the running resistance, i.e. ,in This is due to gravitational acceleration; at this point, the elevator needs to convert the heavier counterweight into potential energy while simultaneously overcoming running resistance. The total power is positive, indicating that it is in motor mode. Power flows from the motor to the car; the power on the motor side needs to be divided by the efficiency, i.e., the positive efficiency. (Efficiency of the motor under downward electric operation) converts the downward power on the shaft side into the first power measured on the motor side, thereby establishing the first equation.

[0050] Alternatively, the first equation satisfies the following formula:

[0051]

[0052] in, It is the acceleration due to gravity. For the downlink power of the shaft side, This refers to the positive efficiency of the elevator drive motor, used to correct power losses during the motor and mechanical transmission process.

[0053] It should be noted that the downlink power on the shaft side is the theoretical power on the mechanical side, which needs to be converted into the measured power on the motor side through positive efficiency.

[0054] Based on the above steps, by combining the force balance model with efficiency correction, the first equation accurately correlates the measured power, mechanical parameters, and the balance coefficient to be determined.

[0055] S302. Based on the elevator operating parameters, establish the second equation based on the elevator mechanical model.

[0056] The elevator mechanics model still focuses on the force balance of the traction system. Unlike S301, this step is for the elevator's upward operation and needs to consider the change in the power transmission direction, which involves the power generation operation.

[0057] In this embodiment, the system first establishes equations based on the traction system force balance model, including the balance coefficient q to be calculated, the rated load Q, the running resistance F, the second running speed, and the upward power on the hoistway side. During upward movement, the counterweight's gravity is greater than the car's weight. The upward power on the hoistway side is the sum of the power done by the running resistance and the power done by the unbalanced gravity in the opposite direction. At this point, the power generated flows from the shaft side to the motor, and needs to be multiplied by the efficiency, i.e., the reverse efficiency. The upward power on the shaft side is converted into the second power measured on the motor side, and then the second equation is established.

[0058] Alternatively, the second equation satisfies the following formula:

[0059]

[0060] in, This represents the upward power on the shaft side; the negative sign indicates the direction. This refers to the reverse efficiency of the elevator drive motor, used to correct power transmission losses during power generation.

[0061] It should be noted that the sign of the power in the second equation directly reflects the elevator's operating status, including whether it is generating electricity or motor power. This avoids errors in the equation due to confusion about efficiency types, and it is a key feature that distinguishes it from the first equation.

[0062] Based on the above steps, the second equation accurately characterizes the relationship between mechanical parameters, power, and balance coefficient under the upward working condition, complementing the first equation.

[0063] S303. Based on the first and second equations, the expression for calculating the balance coefficient is obtained.

[0064] In this embodiment, the first operating speed is controlled based on the elevator variable frequency drive system. With the second running speed Since the magnitudes are equal, the balance coefficient calculation device calculates the product of the first and second equations to obtain the product expression: ;because The simplified equation after multiplication satisfies: ; and then utilize the drag coefficient Substitute the product expression to obtain the expression for calculating the balance coefficient.

[0065] Optionally, the expression for calculating the balance coefficient satisfies the following formula:

[0066]

[0067] in, The value ranges from 5% to 10%.

[0068] It should be noted that the basis for making the first running speed equal to the second running speed is that the speed control accuracy of the elevator variable frequency drive system is high, and the error between the feedback speed and the command speed is usually within two per thousand. The impact of the speed difference on the calculation can be ignored. The elevator variable frequency drive system belongs to the prior art, and this application does not make specific limitations.

[0069] Based on the above steps, by simplifying variables and replacing resistance, the complex multi-parameter calculation was successfully transformed into a solution formula containing only the balance coefficient q to be calculated. This avoids the pain point of difficult measurement of running resistance and provides a simple and accurate mathematical tool for quickly solving the balance coefficient q.

[0070] S304. Based on different types of elevator drive motors and different types of elevator guide shoes, determine the ratio of forward efficiency to reverse efficiency and calculate the balance coefficient.

[0071] Among them, different types of elevator drive motors include permanent magnet synchronous traction machines and asynchronous motors; different types of elevator guide shoes include sliding guide shoes and rolling guide shoes.

[0072] In this embodiment, the balance coefficient calculation device retrieves the traction machine model and guide shoe configuration information through the system's device parameter interface. If the drive motor uses a permanent magnet synchronous traction machine, the positive efficiency is calculated based on the characteristics of the permanent magnet synchronous traction machine. With reverse efficiency Since the forward efficiency is equal to the reverse efficiency, the ratio of forward efficiency to reverse efficiency is 1. This simplifies the balance coefficient to... If it is an asynchronous motor, first confirm the gearbox configuration, such as a worm gear reducer. Retrieve the ratio of the forward and reverse efficiencies of the traction machine from the pre-stored motor parameter library, substitute it into the balance coefficient equation, and calculate the balance coefficient. Then, determine the specific value of the resistance coefficient K according to the guide shoe type or system configuration. When the elevator uses sliding guide shoes, K should be 10%; when the elevator uses rolling guide shoes, K should be 5%. If the system configuration is not clear, K can be 8%. Substitute the K value and the ratio of forward efficiency to reverse efficiency into the balance coefficient equation to finally calculate the balance coefficient q.

[0073] It should be noted that for asynchronous motors, worm gear reducers are generally used. Since there are not many specific reducer configuration models, and the workload of obtaining reducer parameters is not too large, the above method can be implemented.

[0074] To further verify and illustrate the method performance and detection accuracy of this invention in practical applications, the influence of different values ​​of the drag coefficient K on the calculation results is analyzed:

[0075] With a rated load Q=1050kg, a rated speed of 1.75m / s, a permanent magnet synchronous motor, an overall efficiency of approximately 85%, and using sliding guide shoes, the balance coefficient measured according to the GBT10059-2023 standard method is 0.481.

[0076] The improved elevator balance coefficient detection method proposed in this application involves a round trip from the bottom to the top floor. The power and speed data measured when the elevator reaches the half-lift height are as follows: = -6444w, =1.751m / s, = 11461w, =1.75m / s, the results of calculating the equilibrium coefficient using different K values ​​are shown in Table 1:

[0077] Table 1. Results of Calculation of Equilibrium Coefficients Using Different K Values ​​under Different Methods

[0078]

[0079] Based on the results, it can be concluded that the calculation results for different K values ​​are consistent with GB / T 10059-202

[0080] The results show that the calculation results for different K values ​​have relatively small errors compared to the test results of the GBT10059-2023 test method. Even if the drag coefficient is ignored, i.e., K=0, the calculation error is still small. This is because the drag coefficient K in the formula is a square relationship after multiplying the uplink and downlink power. The square value of K values ​​less than 0.1 is much smaller than the square of the balance coefficient, so it has a limited impact on the final calculation result.

[0081] In practical applications, based on empirical values ​​from actual tests, when the elevator uses sliding guide shoes, K should be 10%; when the elevator uses rolling guide shoes, K should be 5%; if the system configuration is not clearly defined, K can be initially set to 8%, which can be determined without additional measurement. Furthermore, optimizing efficiency parameters for different motor types ensures parameter compatibility and avoids calculation errors caused by parameter mismatch, which is a key design for achieving compatibility with multiple elevator types.

[0082] As an example 1, the power and speed data measured when the device runs back and forth from the bottom to the top according to the method of the present invention, at the half-lift height position, are as follows: = -5908w, =1.75m / s, = 12202w, =1.751 m / s. According to the calculation method of this invention, when the system configuration is not specified, K is taken as 8%, resulting in a balance coefficient of 0.478. When the sliding guide shoe is specified, K is taken as 10%, resulting in a balance coefficient of 0.482. The balance coefficient calculated according to the T-CASEI T101-2015 method is 0.502. Obviously, regardless of the value of K, the method of this invention is closer to the test value of 0.481 in GBT10059-2023 than that in T-CASEI T101-2015.

[0083] As an example 2, the same elevator as in Example 1, after replacing the rolling guide shoes, i.e., changing the elevator's resistance coefficient, the balance coefficient measured according to the GBT10059-2023 standard method remains 0.481. Following the method of this invention, the power and speed data measured when the elevator travels from the bottom to the top floor and reaches the half-lift height are as follows: =-6444w, =1.751m / s, =11461w, =1.75m / s. According to the calculation method of this invention, without specifying the system configuration, K is taken as 8%, resulting in a balance coefficient of 0.484. With a specified rolling guide shoe, K is taken as 5%, resulting in a balance coefficient of 0.48. The balance coefficient calculated according to the T-CASEIT101-2015 method is 0.497. It can be seen that as the friction coefficient decreases, the measurement error of the method of this invention is not significantly affected, while the measurement method of T-CASEIT101-2015 is significantly affected by the resistance coefficient. Elevators with lower resistance will be closer to the actual value, but compared with the calculation results of this invention, the measurement method of T-CASEIT101-2015 still has a large error because it does not consider the influence of elevator efficiency during power generation and motor operation.

[0084] As an example 3, the same elevator as in Example 1, with the replacement of the Class III energy-efficient main unit (i.e., reducing the overall elevator efficiency), the balance coefficient measured according to the GBT10059-2023 standard method is still 0.481. Following the method of this invention, the power and speed data measured when the elevator reaches the half-lift height during a round trip from the bottom to the top are as follows: =-5561w, =1.75m / s, =12965w, =1.75m / s. According to the calculation method of this invention, without specifying the system configuration, K is taken as 8%, resulting in a balance coefficient of 0.478; the balance coefficient calculated by the T-CASEIT101-2015 method is 0.514. It can be seen that the calculation method of this invention, because it offsets the uplink and downlink efficiency, is not affected by the overall system efficiency, while the calculation method of T-CASEIT101-2015 does not consider the overall system efficiency, and its calculation results will have a larger error as the overall system efficiency decreases.

[0085] Based on the above steps, by adapting to the structure and motor characteristics of different elevators, it can cover mainstream elevator types without redesigning the calculation logic for specific elevators. This not only improves the versatility of the method but also ensures the accuracy of the balance coefficient calculation in different scenarios, meeting the diverse needs of actual testing.

[0086] Based on the above technical solution, through the logic of automatic parameter acquisition under no-load conditions, force balance model modeling, simultaneous equation simplification, and multi-type elevator adaptation, it not only achieves rapid automatic detection of elevator load without manual loading, but also ensures detection accuracy through efficiency correction, resistance replacement, and multi-type adaptation design. It effectively solves the technical problem that existing technologies cannot achieve both high accuracy and rapid automatic detection of elevator balance coefficients, and provides an efficient and accurate solution for elevator balance coefficient detection.

[0087] The above primarily describes the solutions of the embodiments of this application from the perspective of device implementation. It is understood that each device, such as the improved elevator balance coefficient rapid detection device, includes at least one of the hardware structure and software module corresponding to each function in order to achieve the above-mentioned functions. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0088] This application embodiment can divide the improved elevator balance coefficient rapid detection device into functional units based on the above method example. For example, each function can be divided into its own functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or software. It should be noted that the unit division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0089] When using integrated units,Figure 4 A possible structural schematic diagram of the improved elevator balance coefficient rapid detection device (referred to as the improved elevator balance coefficient rapid detection device 40) involved in the above embodiments is shown. The improved elevator balance coefficient rapid detection device 40 includes a processing unit 401 and a communication unit 402, and may also include a storage unit 403. Figure 4 The schematic diagram shown can be used to illustrate the structure of the improved elevator balance coefficient rapid detection device involved in the above embodiments.

[0090] when Figure 4 The schematic diagram shown illustrates the structure of the improved elevator balance coefficient rapid detection device involved in the above embodiments. The processing unit 401 is used to control and manage the operation of the improved elevator balance coefficient rapid detection device, the communication unit 402 is used for the improved elevator balance coefficient rapid detection device to communicate with other devices, and the storage unit 403 is used to store the program code and data of the improved elevator balance coefficient rapid detection device.

[0091] For example, communication unit 402 is used to acquire elevator operating parameters; the parameters include the first power of the elevator drive motor. Second power The elevator's first running speed Second operating speed Rated load capacity Q;

[0092] Processing unit 401 is used to calculate the balance coefficient based on elevator operating parameters. Where q is the elevator balance coefficient. This is the elevator's resistance coefficient. This refers to the positive efficiency of the elevator drive motor. This refers to the reverse efficiency of the elevator drive motor. This is the acceleration due to gravity.

[0093] In one possible implementation, the first running speed First power The second running speed is the speed of the elevator descending at a constant speed to the halfway point of the hoistway when the car is empty, and the active power of the drive motor. Second power The speed and active power of the drive motor when the elevator is running at a constant speed to the halfway point of the shaft under empty car conditions.

[0094] In one possible implementation, the processing unit 401 is further configured to acquire elevator operating parameters, including: a first operating speed. Second operating speed The first power of the drive motor is measured by the elevator speed measuring device. Second power The power is measured by a motor power measuring device; the car position is determined by a car position measuring device when the elevator runs at a constant speed to the 1 / 2 position of the shaft; the balance coefficient is calculated by a balance coefficient calculating device.

[0095] In one possible implementation, the processing unit 401 is further configured to calculate the balance coefficient, including: establishing a first equation based on the elevator mechanical model of the traction system force balance according to the elevator operating parameters; the first equation satisfies: Where F is the elevator running resistance; the running resistance F is the sum of the guide shoe friction resistance, the wire rope friction resistance, and the traction sheave friction resistance during the operation of the car and counterweight, as well as the wind resistance; based on the elevator running parameters and the elevator mechanical model, a second equation is established; the second equation satisfies: Based on the first and second equations, the expression for calculating the balance coefficient is obtained.

[0096] In one possible implementation, the processing unit 401 is further configured to obtain a balance coefficient calculation expression based on the first equation and the second equation, including: controlling the first running speed based on the elevator frequency conversion drive system. With the second running speed The magnitudes are equal; calculate the product of the first and second equations, obtain the product expression, and use the drag coefficient. Substitute the product expression to obtain the expression for calculating the balance coefficient.

[0097] In one possible implementation, the product expression satisfies the following formula:

[0098]

[0099] in, .

[0100] In one possible implementation, the drag coefficient K is taken as 5% to 10%.

[0101] In one possible implementation, after calculating the balance coefficient, The value of satisfies the following process: If the elevator drive motor uses a permanent magnet synchronous traction machine, the forward efficiency With reverse efficiency Equal, with a value of 1; if the elevator drive motor is an asynchronous motor, the ratio of forward efficiency to reverse efficiency is obtained based on the gearbox configuration.

[0102] In one possible implementation, the specific value of the resistance coefficient K should meet the following rules: when the elevator uses sliding guide shoes, K should preferably be 10%; when the elevator uses rolling guide shoes, K should preferably be 5%; if the system configuration is not specified, K can be 8%.

[0103] The processing unit 401 can be a processor or a controller, and the communication unit 402 can be a communication interface, transceiver, transceiver circuit, transceiver device, etc. The term "communication interface" is a general term and may include one or more interfaces. The storage unit 403 can be a memory. When the improved elevator balance coefficient rapid detection device 40 is a chip, the processing unit 401 can be a processor or a controller, and the communication unit 402 can be an input interface and / or an output interface, pins, or circuits, etc. The storage unit 403 can be a storage unit within the chip (e.g., a register, cache, etc.) or a storage unit located outside the chip (e.g., read-only memory (ROM), random access memory (RAM, etc.)).

[0104] The communication unit can also be called a transceiver unit. The antenna and control circuit with transceiver functions in the improved elevator balance coefficient rapid detection device 40 can be considered as the communication unit 402 of the improved elevator balance coefficient rapid detection device 40, and the processor with processing functions can be considered as the processing unit 401 of the improved elevator balance coefficient rapid detection device 40. Optionally, the device in the communication unit 402 used to implement the receiving function can be considered as the communication unit, which is used to execute the receiving steps in the embodiments of this application. The communication unit can be a receiver, a receiver circuit, etc. The device in the communication unit 402 used to implement the transmitting function can be considered as the transmitting unit, which is used to execute the transmitting steps in the embodiments of this application. The transmitting unit can be a transmitter, a transmitter, a transmitting circuit, etc.

[0105] Figure 4 If the integrated units in the process are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. Storage media for storing computer software products include various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

[0106] Figure 4 The units in the process can also be called modules; for example, a processing unit can be called a processing module.

[0107] This application embodiment also provides a hardware structure diagram of an improved elevator balance coefficient rapid detection device (denoted as improved elevator balance coefficient rapid detection device 50), see [link to diagram]. Figure 5 The improved elevator balance coefficient rapid detection device 50 includes a processor 501, and optionally, a memory 502 connected to the processor 501.

[0108] In the first possible implementation, see Figure 5 The improved elevator balance coefficient rapid detection device 50 also includes a transceiver 503. The processor 501, memory 502, and transceiver 503 are connected via a bus. The transceiver 503 is used to communicate with other devices or communication networks. Optionally, the transceiver 503 may include a transmitter and a receiver. The device in the transceiver 503 that implements the receiving function can be considered as a receiver, which is used to perform the receiving steps in the embodiments of this application. The device in the transceiver 503 that implements the transmitting function can be considered as a transmitter, which is used to perform the transmitting steps in the embodiments of this application.

[0109] Based on the first possible implementation method Figure 5 The schematic diagram shown can be used to illustrate the structure of the improved elevator balance coefficient rapid detection device involved in the above embodiments.

[0110] in, Figure 5 The system chip in the improved elevator balance coefficient rapid detection device can also be illustrated. In this case, the actions performed by the improved elevator balance coefficient rapid detection device can be implemented by this system chip. The specific actions performed can be found above and will not be repeated here.

[0111] In implementation, each step of the method provided in this embodiment can be completed by integrated logic circuits in the processor or by instructions in software form. The steps of the method disclosed in the embodiments of this application can be directly manifested as being executed by a hardware processor, or being executed by a combination of hardware and software modules in the processor.

[0112] The processor in this application may include, but is not limited to, at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, etc., which are various computing devices that run software. Each computing device may include one or more cores for executing software instructions to perform calculations or processing. The processor may be a separate semiconductor chip or integrated with other circuits into a single semiconductor chip. For example, it may be integrated with other circuits (such as encoding / decoding circuits, hardware acceleration circuits, or various bus and interface circuits) to form a SoC (System-on-a-Chip), or it may be integrated as a built-in processor within an ASIC. The ASIC with the integrated processor may be packaged separately or together with other circuits. In addition to the cores for executing software instructions to perform calculations or processing, the processor may further include necessary hardware accelerators, such as field-programmable gate arrays (FPGAs), PLDs (programmable logic devices), or logic circuits that implement dedicated logic operations.

[0113] The memory in the embodiments of this application may include at least one of the following types: read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions; random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions; or electrically erasable programmable-only memory (EEPROM). In some scenarios, the memory may also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures that can be accessed by a computer, but is not limited thereto.

[0114] This application also provides a computer-readable storage medium including instructions that, when run on a computer, cause the computer to perform any of the methods described above.

[0115] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to perform any of the methods described above.

[0116] This application also provides a chip including a processor and an interface circuit. The interface circuit is coupled to the processor. The processor is used to run computer programs or instructions to implement the above-described method. The interface circuit is used to communicate with other modules outside the chip.

[0117] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0118] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0119] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

Claims

1. An improved method for rapid detection of elevator balance coefficient, characterized in that, include: Obtain elevator operating parameters; The elevator operating parameters include the first power of the elevator drive motor. Second power The elevator's first running speed Second operating speed Rated load capacity Q; Calculate the balance coefficient based on the elevator operating parameters. Where q is the elevator balance coefficient. This is the elevator's resistance coefficient. This refers to the positive efficiency of the elevator drive motor. This refers to the reverse efficiency of the elevator drive motor. The acceleration due to gravity; the drag coefficient of the elevator satisfies: F represents the elevator's running resistance.

2. The method according to claim 1, characterized in that, First running speed First power The second running speed is the speed of the elevator when it descends at a constant speed to the halfway point of the hoistway, under conditions where the car is empty. Second power The speed and active power of the drive motor when the elevator is running at a constant speed to the halfway point of the shaft under empty car conditions.

3. The method according to claim 2, characterized in that, The acquisition of elevator operating parameters includes: First running speed The second operating speed Measured by elevator speed measuring device; The first power of the drive motor Second power Measured by a motor power measuring device; The elevator's position at a constant speed until it reaches the 1 / 2 position of the shaft is determined by the car position measuring device. The process of calculating the balance coefficient is performed by a balance coefficient calculation device.

4. The method according to claim 1, characterized in that, The calculation of the balance coefficient includes: Based on the elevator operating parameters, a first equation is established using an elevator mechanical model based on the force balance of the traction system; the first equation satisfies: Where F is the elevator running resistance; the running resistance F is the sum of the guide shoe friction resistance, the wire rope friction resistance and the traction sheave friction resistance and the wind resistance during the operation of the car and the counterweight. Based on the elevator operating parameters and the elevator mechanical model, a second equation is established; the second equation satisfies: ; Based on the first equation and the second equation, the expression for calculating the balance coefficient is obtained.

5. The method according to claim 4, characterized in that, Based on the first equation and the second equation, the expression for calculating the balance coefficient is obtained, including: The first operating speed is controlled based on the elevator variable frequency drive system. With the second running speed They are the same size; Calculate the product of the first equation and the second equation to obtain the product expression, and substitute the drag coefficient into the product expression to obtain the balance coefficient calculation expression.

6. The method according to claim 5, characterized in that, The product expression satisfies the following formula: ； in, .

7. The method according to claim 5, characterized in that, The drag coefficient K is 5% to 10%.

8. The method according to claim 1, characterized in that, After calculating the balance coefficient, The value of satisfies the following process: If the elevator drive motor uses a permanent magnet synchronous traction machine, the forward efficiency is... With reverse efficiency If they are equal, the value is 1. If the elevator drive motor is an asynchronous motor, the ratio of forward efficiency to reverse efficiency is obtained based on the gearbox configuration.

9. The method according to claim 7, characterized in that, The specific value of the resistance coefficient K should meet the following rules: when the elevator uses sliding guide shoes, K should preferably be 10%; when the elevator uses rolling guide shoes, K should preferably be 5%; if the system configuration is not specified, K can be 8%.

10. An improved rapid detection system for elevator balance coefficient, used to implement the method described in any one of claims 1-9, characterized in that, The system includes: a motor power measuring device, an elevator speed measuring device, a car position measuring device, and a balance coefficient calculation device; The motor power measuring device is used to measure the first power of the drive motor when the elevator is running at a constant speed downward to the position where the balance coefficient of the hoistway is to be calculated, and to measure the second power of the drive motor when the elevator is running at a constant speed upward to the position where the balance coefficient of the hoistway is to be calculated, under the condition that the car is unloaded. The elevator speed measuring device is used to measure the first running speed of the car when the elevator is running at a constant speed downward to the position where the balance coefficient is to be calculated at 1 / 2 of the shaft, under the condition of the car being unloaded, and to measure the second running speed of the car when the elevator is running at a constant speed upward to the position where the balance coefficient is to be calculated at 1 / 2 of the shaft. The car position measuring device is used to identify whether the car has run to the position of the balance coefficient to be calculated 1 / 2 of the shaft during the unloaded downward and unloaded upward processes, and to provide a position determination basis for the motor power measuring device to trigger the measurement of the first power and the second power, and for the elevator speed measuring device to trigger the measurement of the first running speed and the second running speed. The balance coefficient calculation device is used to calculate the balance coefficient based on the elevator operating parameters. Where q is the elevator balance coefficient. This is the elevator's resistance coefficient. This refers to the positive efficiency of the elevator drive motor. This refers to the reverse efficiency of the elevator drive motor. The acceleration due to gravity; the drag coefficient of the elevator satisfies: F represents the elevator's running resistance.

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