Escalator load dynamic monitoring method and system

Abstract

The invention discloses an escalator load dynamic monitoring method and system, and relates to the technical field of escalators. The method comprises the following steps: acquiring basic parameters and real-time working data of the escalator; working current data when the escalator is in a no-load state and in a specific load state serve as initial values of the constructed characteristic equation, and an equation between the real-time input current value and the real-time load is constructed; generating a current change curve according to the real-time working current value; and a required current interval is set according to the basic parameters, when the real-time current value is within the interval, a corresponding signal is generated and output to a terminal, the real-time passenger flow passing through the escalator is obtained, an energy-saving operation scheme of the escalator is formulated, and the use safety of the escalator is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of escalators, and in particular to a dynamic monitoring method and system based on load bearing. Background Art

[0002] Escalators are widely used in shopping malls, public transportation and other places, and are generally used to transport passengers and personal belongings in open areas. Escalators generally use motors as driving devices, and drive the steps to perform reciprocating motion through drive chains, step sprockets and step chains. When the escalator is running, passengers and personal belongings are distributed on the external step pedals as loads. Existing escalators generally use proximity sensors to monitor whether there are passengers. When passengers leave for a period of time, the escalator can be switched to standby operation or stop running. When the passenger reaches the intersection of the step and the comb teeth again, it will start or accelerate again.

[0003] Existing escalators do not have a device to directly monitor whether there are passengers or how many passengers there are on the steps. The aforementioned restart or acceleration time is generally set based on experience, and there is no device to directly monitor the real-time load mass on the steps. When there are too many passengers on the external step pedals or the weight of their belongings is too large, it is easy to cause danger due to crowding or overloading.

[0004] Since the load carried on the steps has dynamic characteristics, dynamic real-time monitoring of the load mass helps to obtain information such as personnel flow in the area and energy-saving operation plans of equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a method and system for dynamically monitoring the load of an escalator, by collecting the working status information of the drive motor, obtaining the load mass borne by the external steps when the escalator is in operation, and outputting the information to the system terminal in the form of a signal to obtain the real-time flow of people passing through the escalator, and formulating an energy-saving operation plan for the escalator to ensure the safe use of the elevator.

[0006] The technical solution of the present invention is: A method for dynamic monitoring of escalator load, the steps are as follows: Obtain the basic parameters and real-time working data of the escalator, and construct the escalator operation characteristic equation; Initializing the basic parameters and outputting the initialized data as initial values ​​of the characteristic equation. Inputting the real-time working data of the escalator during operation into the characteristic equation; After the basic parameters and real-time working data are input into the characteristic equation, an equation between the real-time input current value and the real-time load is constructed, and the real-time working current value is output; A current variation curve is generated according to the real-time working current value, and a required current interval is set according to basic parameters. When the real-time current value is within the interval, a corresponding signal is generated and output to the terminal.

[0007] The present invention is further configured such that the basic parameters include: operating voltage, motor efficiency, power factor, reduction ratio, utilization efficiency, motor input speed, escalator nominal speed, motor reducer low-speed end diameter, lifting height, step height, and operating angle.

[0008] The present invention is further configured such that the real-time working data includes: input current, operating status, and operating direction of the escalator within the starting time.

[0009] The present invention is further configured such that the startup time is: ,in, is the start time, is the rated speed of the escalator.

[0010] The present invention is further configured such that the characteristic equation is: ,in, is the real-time working current, is the rated voltage, is the motor efficiency, For the efficiency of the reducer, is the motor power factor, is the diameter of the motor reducer low speed end, is the torque at the low speed end of the motor, is the initial current at the low speed end when the escalator is running without load. The characteristic equation is initialized by the motor parameters when running without load and with initial load.

[0011] The present invention is further configured such that the initialization of the above characteristic equation is performed by the following steps: obtaining the current of the escalator when it is unloaded; obtaining the current of the escalator when it is loaded with an initial load; obtaining the current and torque coefficient of the escalator, and the friction parameters between the steps and the running track.

[0012] The present invention is further configured that the current value of the escalator when it is unloaded is: ,and ,in is the initial current of the escalator when it is running without load, It is the actual current after the start-up time when the escalator is moving upward without load. It is the actual current after the start-up time when the escalator is descending without load. is the current and torque coefficient, is the friction parameter between the steps and the running track when the escalator is running, is the reduction ratio.

[0013] The present invention is further configured such that the current value of the escalator when carrying the initial load is: ,in, is the initial load mass, is the escalator running angle, The initial load mass is The running current at .

[0014] The present invention is further configured that the escalator current and torque coefficient , friction parameters between step and running track .

[0015] The present invention is further configured as follows: ,in is the actual load when the escalator is running, For escalator under load The real-time input current value at that time.

[0016] The present invention is further configured such that the current interval is When , a signal signal(1) is generated; the current interval is When , a signal signal (2) is generated; the current interval is When , the signal signal(3) is generated.

[0017] The present invention also provides an escalator load dynamic monitoring system, comprising: 1. Signal acquisition module: includes input port (1) and output port (2). Input port (1) is connected to the escalator main switch to detect the running current value in real time. , and generates corresponding signals to the output port (2). The output port (2) is connected to the mainboard processing module; 2. Mainboard processing module: including input port (3) and output port (4). The input port (3) is connected to the output port (2), receives the current signal output by the signal acquisition module, performs real-time calculation and comparison with the initial value of the characteristic equation, and then outputs the corresponding information to the output port (4); 3. Information display and voice prompt module: including input port (5) and display.

[0018] The present invention is further configured such that the input port (1) in the signal acquisition module obtains power supply information at the main switch, and connects basic parameters such as operating voltage, motor efficiency, power factor, reduction ratio, use efficiency, motor input speed, escalator nominal speed, and reducer low-speed end diameter to the input port (3) in the mainboard processing module through the output port.

[0019] The present invention is further configured such that the power information at the main switch should be continuously acquired and output to the mainboard processing module.

[0020] The present invention is further configured that the mainboard processing module inputs the collected basic parameters into the characteristic equation, and obtains the escalator under the load of The real-time input current value at that time is determined by logic, and the current range to which it belongs is determined. Three types of signals, signal (1), signal (2), and signal (3), are generated and input into the display and voice prompt module.

[0021] The present invention is further configured such that the information display and voice prompt module makes judgments based on the three types of signals received by the input port and displays different information on the display.

[0022] The present invention provides a method and system for dynamically monitoring the load of an escalator, which have the following beneficial effects: 1. Strong adaptability: The present invention utilizes the automatic feedback characteristics of the load and the motor. It only needs to set the basic parameters. By collecting real-time working data and comparing them with the characteristic equation, the operating signal can be obtained. By modulating the basic parameters and the characteristic equation, it can adapt to escalators with different parameters, which has the characteristics of strong adaptability.

[0023] 2. Improved escalator safety: Dynamic real-time monitoring of load quality is achieved through monitoring of input current, quantitative output of load data is processed and displayed, abnormal warnings can be issued, and the safety of equipment and passengers is guaranteed.

[0024] 3. Low cost and strong versatility: The present invention does not require the installation of additional sensor devices, and does not require the modification of the original system. It can realize the function by using a simple single-chip microcomputer, and is easy to install on various types of escalators, reducing the modification cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the method in the embodiment of the present invention, the following drawings are used for illustration: Figure 1 This is a flow chart of a method for dynamic monitoring of escalator load according to the present invention; Figure 2 The present invention is a schematic structural diagram of an escalator load dynamic monitoring system. DETAILED DESCRIPTION

[0026] The following is a description of the embodiments of the present invention in conjunction with the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the advantages of the present invention from the contents described. The present invention has strong versatility and can be implemented or applied through other embodiments. The preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0027] like Figure 1 , a method for dynamic monitoring of escalator load, the steps are as follows: Obtain the basic parameters and real-time working data of the escalator, and construct the escalator operation characteristic equation; Initializing the basic parameters and outputting the initialized data as initial values ​​of the characteristic equation. Inputting the real-time working data of the escalator during operation into the characteristic equation; After the basic parameters and real-time working data are input into the characteristic equation, an equation between the real-time input current value and the real-time load is constructed, and the real-time working current value is output; A current variation curve is generated according to the real-time working current value, and a required current interval is set according to basic parameters. When the real-time current value is within the interval, a corresponding signal is generated and output to the terminal.

[0028] Specifically, obtaining the basic parameters and functions includes: Working voltage, motor efficiency, and power factor are used to calculate the real-time power of the motor; Reduction ratio, efficiency, and motor input speed are used to calculate the torque at the low-speed end of the motor; The nominal speed of the escalator and the diameter of the low-speed end of the motor reducer are used to calculate the real-time working current; Lifting height, step height, and operating angle are used to calculate external loads and current ranges.

[0029] Specifically, the real-time working data is preprocessed, including: the input current, operating status, and operating direction of the escalator during the startup time. The input current obtained by the motor during the startup time has a large degree of data dispersion due to the oscillation of the external power supply and the feedback caused by the startup. The abnormal values ​​are cleaned and filtered after the startup time.

[0030] The present invention is further configured such that the startup time is: (seconds), where is the start time, The rated speed of the escalator. Different start times are set according to the common escalator running speed.

[0031] The present invention is further configured such that the characteristic equation is: ,in, is the real-time working current, is the rated voltage, is the motor efficiency, For the efficiency of the reducer, is the motor power factor, is the diameter of the motor reducer low speed end, is the torque at the low speed end of the motor, is the initial current at the low speed end when the escalator is running without load. The characteristic equation is initialized by the motor parameters when running without load and with initial load. Specifically, the torque at the low speed end of the characteristic equation is initialized by the current when running without load and the current when loading with initial load.

[0032] The present invention is further configured such that the initialization of the above characteristic equation is performed by the following steps: obtaining the current of the escalator when it is unloaded; obtaining the current of the escalator when it is loaded with an initial load; obtaining the current and torque coefficient of the escalator, and the friction parameters between the steps and the running track.

[0033] The present invention is further configured that the current value of the escalator when it is unloaded is: ,and ,in is the initial current of the escalator when it is running without load, It is the actual current after the start-up time when the escalator is moving upward without load. It is the actual current after the start-up time when the escalator is descending without load. is the current and torque coefficient, is the friction parameter between the steps and the running track when the escalator is running, is the reduction ratio. In particular: the torque generated by the initial current when the escalator is running at no load is used to overcome the friction between the steps and the track when they are running; due to structural reasons, the torque required for the escalator to go up or down when it is running at no load is not the same, and the above no-load running current value needs to be selected based on the up and down current values.

[0034] The present invention is further configured such that the current value of the escalator when carrying the initial load is: ,in, is the initial load mass, is the escalator running angle, The initial load mass is The running current at .

[0035] The present invention is further configured that the escalator current and torque coefficient , friction parameters between step and running track .

[0036] The present invention is further configured as follows: ,in is the actual load when the escalator is running, For escalator under load In particular, the above equation can directly reflect the dynamic load of the step loading as the actual current value.

[0037] The present invention is further configured such that the current interval is When , a signal signal(1) is generated; the current interval is When , a signal signal (2) is generated; the current interval is When , the signal signal(3) is generated.

[0038] like Figure 2 , an escalator load dynamic monitoring system of this embodiment includes: 1. Signal acquisition module: includes input port (1) and output port (2). Input port (1) is connected to the main switch of the escalator to detect the running current value in real time. , and generates corresponding signals to the output port (2). The output port (2) is connected to the mainboard processing module; 2. Mainboard processing module: including input port (3) and output port (4). The input port (3) is connected to the output port (2), receives the current signal output by the signal acquisition module, performs real-time calculation and comparison with the initial value of the characteristic equation, and then outputs the corresponding information to the output port (4); 3. Information display and voice prompt module: including input port (5) and display.

[0039] The present invention is further configured such that the input port (1) in the signal acquisition module obtains power supply information at the main switch, and connects basic parameters such as operating voltage, motor efficiency, power factor, reduction ratio, use efficiency, motor input speed, escalator nominal speed, and reducer low-speed end diameter to the input port (3) in the mainboard processing module through the output port.

[0040] The present invention is further configured such that the power information at the main switch should be continuously acquired and output to the mainboard processing module.

[0041] The present invention is further configured that the mainboard processing module inputs the collected basic parameters into the characteristic equation, and obtains the escalator under the load of The real-time input current value at that time is determined by logic, and the current range to which it belongs is determined. Three types of signals, signal (1), signal (2), and signal (3), are generated and input into the display and voice prompt module.

[0042] The present invention is further configured such that the information display and voice prompt module makes judgments based on the three types of signals received by the input port and displays different information on the display.

[0043] The above embodiments may be implemented in whole or in part by software, hardware or a combination thereof. When implemented by software, the above embodiments may be implemented in whole or in part in the form of a program. A person skilled in the art may use different methods to implement the described functions for each of the above specific steps or contents, and such implementation should not artificially exceed the scope of this application.

[0044] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of substitutions within the technical scope described in the present application, and such substitutions should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for dynamic monitoring of escalator load, characterized in that: include: Obtain the basic parameters and real-time working data of the escalator, and construct the escalator operation characteristic equation; Initializing the basic parameters and outputting the initialized data as initial values ​​of the characteristic equation. Inputting the real-time working data of the escalator during operation into the characteristic equation; After the basic parameters and real-time working data are input into the characteristic equation, an equation between the real-time input current value and the real-time load is constructed, and the real-time working current value is output; A current variation curve is generated according to the real-time working current value, and a required current interval is set according to basic parameters. When the real-time current value is within the interval, a corresponding signal is generated and output to the terminal.

2. The method for dynamic monitoring of escalator load according to claim 1, characterized in that: The basic parameters include: working voltage, motor efficiency, power factor, reduction ratio, use efficiency, motor input speed, escalator nominal speed, motor reducer low speed end diameter, lifting height, step height, and running angle. The real-time working data includes: input current, running status, and running direction of the escalator within the startup time.

3. The method for dynamic monitoring of escalator load according to claim 2, characterized in that: The startup time is: ,in, is the start time, is the rated speed of the escalator.

4. The method for dynamic monitoring of escalator load according to claim 1, characterized in that: The characteristic equation is: ,in, is the real-time working current, is the rated voltage, is the motor efficiency, For the efficiency of the reducer, is the motor power factor, is the diameter of the motor reducer low speed end, is the torque at the low speed end of the motor, is the initial current at the low speed end when the escalator is running without load. The characteristic equation is initialized by the motor parameters when running without load and with initial load.

5. The method for dynamic monitoring of escalator load according to claim 4, characterized in that: The initialization of the above characteristic equation is carried out by the following steps: obtaining the current of the escalator when it is unloaded; obtaining the current of the escalator when it is loaded with an initial load; obtaining the current and torque coefficient of the escalator, and the friction parameters between the steps and the running track.

6. The method for dynamic monitoring of escalator load according to claim 5, characterized in that: The current value of the above escalator when it is unloaded is: ,and ,in is the initial current of the escalator when it is running without load, It is the actual current after the start-up time when the escalator is moving upward without load. It is the actual current after the start-up time when the escalator is descending without load. is the current and torque coefficient, is the friction parameter between the steps and the running track when the escalator is running, is the reduction ratio; the current value of the above escalator when it is loaded with initial load is: ,in, is the initial load mass, is the escalator running angle, The initial load mass is The operating current of the escalator when it is loaded with the initial load is: ,in, is the initial load mass, is the escalator running angle, The initial load mass is The operating current at .

7. The method for dynamic monitoring of escalator load according to claim 6, characterized in that: Escalator current and torque coefficient , friction parameters between step and running track .

8. The method for dynamic monitoring of escalator load according to claim 1, characterized in that: ,in is the actual load when the escalator is running, For escalator under load The real-time input current value at that time.

9. The method for dynamic monitoring of escalator load according to claim 1, characterized in that: The current range is When , a signal signal(1) is generated; the current interval is When , a signal signal (2) is generated; the current interval is When , the signal signal(3) is generated.

10. An escalator load dynamic monitoring system, characterized in that: include: Signal acquisition module: includes input port (1) and output port (2). Input port (1) is connected to the escalator main switch to detect the running current value in real time. , and generates corresponding signals to the output port (2). The output port (2) is connected to the mainboard processing module; Mainboard processing module: includes an input port (3) and an output port (4). The input port (3) is connected to the output port (2), receives the current signal output by the signal acquisition module, performs real-time calculation and comparison with the initial value of the characteristic equation, and then outputs the corresponding information to the output port (4); Information display and voice prompt module: includes input port (5) and display.

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