CN110697532A - Background monitoring method for elevator operation - Google Patents
Background monitoring method for elevator operation Download PDFInfo
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- CN110697532A CN110697532A CN201911008541.8A CN201911008541A CN110697532A CN 110697532 A CN110697532 A CN 110697532A CN 201911008541 A CN201911008541 A CN 201911008541A CN 110697532 A CN110697532 A CN 110697532A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0012—Devices monitoring the users of the elevator system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3423—Control system configuration, i.e. lay-out
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3446—Data transmission or communication within the control system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
Abstract
The invention relates to a background monitoring method for elevator operation. In the method, each monitoring module arranged in an elevator car acquires state parameters of the elevator car; and sending the acquired state parameters to a background monitoring system based on an MQTT protocol, determining whether the current elevator car normally operates by the background monitoring system according to the state parameters of the elevator car, and sending alarm information to an operator if the current elevator car is not normal. The method provided by the invention can carry out prediction alarm according to the operation index of the elevator car and the state index in the car before the risk event occurs, so that the risk occurrence is avoided and the damage to passengers is avoided.
Description
Technical Field
The invention relates to the technical field of elevator monitoring, in particular to a background monitoring method for elevator operation.
Background
At present, the popularization of the Internet and the network monitoring are used in all industries, so that the advance prevention of dangerous events is realized.
At present, the elevator belongs to very high portable equipment of rate of utilization such as office environment and house, especially all loads outside elevator in some old and useless districts, makes things convenient for old man child's going upstairs and downstairs. However, for the prevention of dangerous events of elevators, no suitable solution is provided in the prior art, especially for young people going to work and old people and children being trapped in elevators and being more dangerous.
Therefore, after the current elevator breaks down, people trapped in the elevator need to call for help or trigger an alarm button in the elevator, and then maintenance personnel can go on to maintain the elevator. Above-mentioned elevator maintenance belongs to the processing scheme behind the dangerous incident that takes place, takes place personnel's injury easily, and causes personnel's psychological fear. How to provide a method for early detection and prevention of dangerous events of elevators in houses becomes a problem to be solved at present.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a background monitoring method for elevator operation.
In order to achieve the purpose, the invention adopts the main technical scheme that:
a method of background monitoring of elevator operation, the method comprising:
each monitoring module arranged in the elevator car acquires state parameters of the elevator car; the acquired state parameters are sent to a background monitoring system based on an MQTT protocol, the background monitoring system determines whether the current elevator car is normal or not according to the state parameters of the elevator car, and if not, alarm information is sent to an operator;
the state parameters include: the current bearing information of the elevator car, the brightness and temperature information inside the elevator car, the running state/car state of the elevator car, the hall door information and/or the running index of the elevator car;
the backstage monitored control system according to the state parameter of elevator car, confirm whether the operation of current elevator car is normal, include:
the first condition is that: the running state of the elevator car is a hall door opening state, the speed in the running index is 0, and the maintaining time of the hall door opening state is greater than the maximum maintaining time threshold value;
the second condition is that: the running state of the elevator car is a hall door closing state, and the variation range of the speed in the running index within first preset time is smaller than a first parameter range, or the variation range within second preset time is larger than a second parameter range;
a third condition: the temperature information of the elevator car exceeds a first temperature threshold value within a third preset time period;
a fourth condition: the bearing information of the elevator car exceeds the first weight value in a fourth preset time period;
a fifth condition: the conversion times of the brightness information of the elevator car in a fifth preset time period are greater than the preset times;
if any one of the first condition to the fifth condition is met, acquiring video information of the current elevator car, and displaying the video information to an operator;
if at least two conditions in the first condition to the fifth condition are met, video information of the elevator car in a sixth preset time period is stored, alarm information is sent to a terminal held by an operator, and a danger instruction is sent to the elevator car, so that a danger alarm indicating lamp of the elevator car sends danger prompt information according to the danger instruction.
In some embodiments, a monitoring module disposed within an elevator car, comprises: the device comprises a speed detection module, a brightness sensing module, a temperature sensing module, a distance sensing module and a weight monitoring module;
the speed detection module is embedded in a rotary encoder of a traction machine of an elevator and is used for acquiring operation indexes of an elevator car, wherein the operation indexes comprise car operation speed, car operation acceleration and/or car operation direction;
the distance sensing module is embedded in the inner side of a car door of the elevator car and used for detecting the running state of a hall door of the elevator car, and the running state of the hall door comprises: the distance between the opened hall doors, the current position of the hall doors and the maintenance time of each state after the hall doors are opened; and detecting information about whether a person enters the car (for example, the information about whether the person enters the car is monitored and transmitted to the main board, the main board instructs to prohibit the car door from being closed, and at the moment, a door knife on the door machine prevents the hall door from being closed);
the brightness sensing module is embedded in a key area of the elevator car and used for acquiring the brightness value in the elevator car;
the temperature sensing module is embedded in a key area of the elevator car and used for acquiring a temperature value in the car;
the weight monitoring module is embedded in a bottom car frame of the elevator car and used for acquiring bearing information of the elevator car;
the speed detection module, the brightness sensing module, the temperature sensing module, the distance sensing module and the weight monitoring module are all communicated with the background monitoring system based on an MQTT protocol, and information acquired in real time is transmitted to the background monitoring system.
In some embodiments, the third condition further comprises:
the temperature in the cage in the current state is greater than a preset standard temperature log [ (integral value of difference between the temperature in the cage and room temperature +1) × integral value of current state maintaining time ];
the temperature in the cage in the current state is less than a preset standard temperature log [ (an integer value of a difference value between room temperature and the temperature in the cage +1) — an integer value of current state maintaining time ] -5; the unit of the temperature in the lift car and the unit of the room temperature are both centigrade, and the unit of the current state maintaining time is second;
the current state maintaining time of the elevator car is equal to the current time-the current state starting time;
the operating state of the elevator car comprises: the hall door and the car door are in an open state, and the hall door and the car door are in a closed state;
if the current state of the elevator car is a hall door and car door opening state, determining the time when the distance between the hall doors is equal to the preset door opening distance as the starting time of the current state;
and if the current state of the elevator car is a hall door and car door closed state, determining the time when the distance between the hall doors is less than the preset door opening distance as the current state starting time.
In some embodiments, the monitoring modules disposed within the elevator car further comprise: the device comprises an infrared detection module and a position detection module;
after the background monitoring system sends a danger instruction to the elevator car, the background monitoring system starts the infrared detection module to acquire a detection signal of the infrared detection module;
judging whether passengers exist in the elevator car with the current dangerous event or not according to the detection signal of the infrared detection module;
if the passenger exists, detecting the position of the elevator car through a position detection module, and sending a departure prompting message to the passenger when the position of the elevator car reaches a determined safety floor and the elevator car is in an open state;
if no passenger is in the elevator car, a locking instruction is sent to the elevator car, and the elevator car is in a pause operation stage in a closed state after reaching a safe floor according to the locking instruction;
wherein the infrared detection module is located in a top area of the elevator car to monitor in-car occupant information;
the position detection module includes: scale and scale sensor, the scale hangs perpendicularly in the elevator well, the scale bottom links to each other with overspeed device tensioner, and the top at the car is installed to the scale sensor, the code that the scale sensor read on the scale with the positional information transmission of car extremely backstage monitored control system.
In some embodiments, the operational indicators include:
the running speed of the car, the acceleration of the car and the running direction of the car;
the second condition includes:
in a seventh preset time period, the average running speed of the lift car is higher than a preset speed threshold, and the highest running speed of the lift car is higher than a preset highest speed threshold;
and the time for getting out of the elevator car hall door to be in an open state is calculated in the process of calculating the average running speed of the elevator car.
In some embodiments, the background monitoring system is further configured to periodically perform image processing on the video information, and send alarm information to a terminal held by an operator if an abnormal phenomenon is identified in the image processing.
In some embodiments, the state parameters further include:
the information of various arriving floors of the elevator movement in each calculation time period;
accordingly, the method further comprises:
the background monitoring system acquires the bending times of the elevator steel wire rope at the specified position in the calculation time period of the current elevator and the maximum bending position information according to various arriving floor information of the elevator motion in each calculation time period and basic information which is pre-stored in the background monitoring system and belongs to the elevator;
the background monitoring system acquires the bending fatigue value of the elevator in the calculation time period according to the bending times and the maximum bending position information;
and the background monitoring system determines whether the current elevator runs normally according to the bending fatigue value.
In some embodiments, obtaining the bending times of the elevator steel wire rope at the specified position in the calculation time period of the current elevator, and obtaining the maximum bending position information comprises:
the method comprises the following steps that the elevator passes through N ascending processes and M descending processes in a calculation time period, and the bending times Nw are obtained according to the following formula I;
the formula I is as follows:
specifically, the total bending times of the total length of the steel wire rope in the j-th descending operation of the elevator are as follows:
the total bending times of the steel wire rope in the ith ascending operation of the elevator are as follows:
wherein, the elevator rises the in-process steel wire rope overall length forward bending number of times for the ith time:
the total length reverse bending times of the steel wire rope in the ith ascending process of the elevator are as follows:
the total length of the steel wire rope is positively bent for the number of times in the j-th descending process of the elevator:
the total length reverse bending times of the steel wire rope in the j-th descending process of the elevator are as follows:
L1the length L of a steel wire rope wound on a traction sheave in the running process of the elevator2The length of a steel wire rope between a traction sheave and a guide wheel in the running of the elevator, Ls is the length of a steel wire rope of a pulley in the running of the elevator, i is the current ith ascending running process of the elevator in a calculation time period, aiInitial floor number b for i-th ascending operation process of elevatoriThe number of floors for the ith ascending operation process of the elevator, H is the coordinate of the full length position of the steel wire rope, H is the coordinate of the upper part of the rope at the joint of the top of the counterweight and the steel wire rope, and hi is the initial number of floors a in the ith ascending operation process of the elevatoriCorresponding position coordinates, delta hi, the length value of the action steel wire rope in the ith ascending operation process of the elevator, and +/-delta, the upper and lower bound expansion error of the operation segmented interval;
j is the current j-th descending operation process of the elevator, ajInitial floor number b for j-th descending operation process of elevatorjThe number of floors for the j descending operation process of the elevator and hj is the initial number of floors a in the j descending operation process of the elevatorjAnd the corresponding position coordinate and the corresponding delta Hj are the length values of the action steel wire rope in the j-th descending operation process of the elevator. The information of the above-mentioned parameters can be understood as basic information pertaining to the elevator.
In some embodiments, the background monitoring system obtains the bending fatigue value of the elevator in the calculation time period according to the bending times and the maximum bending position information:
determining a bending fatigue value according to the following formula;
TL＝TS-Max(Nw)
wherein, TSThe test value is a preset steel wire bending test value; t isLIs the bending fatigue value;
max (nw) is the maximum total number of bends at each position along the length of the cord.
In order to achieve the above purpose, the main technical solution adopted by the present invention further comprises:
the background monitoring system is a background server, which may include a memory, a processor, a bus, and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to implement the steps of any one of the above methods.
The invention has the beneficial effects that: the risk occurrence prevention system can predict and alarm according to the operation indexes of the elevator car, the operation indexes of the car door and the state indexes in the car before the risk occurrence, and the avoided risk occurrence can cause harm to people.
Furthermore, it should be noted that, each monitoring module in the elevator car in this application is all through MQTT agreement and backstage monitored control system promptly backstage monitoring server interaction, can realize miniaturized transmission, the overhead is little, and network flow is few, makes things convenient for the backstage monitored control system to realize the control to a plurality of elevator cars.
Drawings
Fig. 1 is a schematic flow chart of a background monitoring method for elevator operation according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a background monitoring method for elevator operation according to another embodiment of the present application;
fig. 3 is an exploded explanatory view of the elevator of the present application;
fig. 4 is a graph illustrating the bending calculation of the elevator from the layer a to the layer b in the present application;
fig. 5 is a diagram illustrating the bending calculation of the elevator of the invention during the descent from the c-floor to the d-floor.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
At present, after the ladder breaks down, people needing to be trapped call for help and maintenance personnel just go to the scene to maintain. This type of solution is a post-hoc solution and can cause psychological trauma to trapped persons. Based on the method, the prediction alarm can be carried out according to the operation indexes of the elevator car, the operation indexes of the car door and the state indexes in the car before the risk event occurs, and the risk is prevented from causing damage to personnel.
The method is suitable for monitoring the residential elevators, and the information acquired by each monitoring module arranged in the elevator car is interacted with the background monitoring system, so that the background monitoring system can calculate and identify the information acquired by each monitoring module, determine whether the elevator car runs at a danger or not and inform passengers of avoiding the danger in time.
It can be understood that in the present application, the interaction between each monitoring module in the elevator car and the background monitoring system is realized based on MQTT protocol.
Each monitoring module in the embodiment is configured according to the structure of the elevator car, and is powered by the power supply of the key area and the lighting area in the elevator car.
The steps or operations of judging and processing according to the information of the monitoring module in the method are realized by interaction between the background monitoring system and the monitoring module in the elevator car, and signals are sent to the elevator car through the processing and judging of the background monitoring system.
Specifically, referring to fig. 1 for detailed description, fig. 1 shows a background monitoring method for elevator operation, which includes:
a01, each monitoring module arranged in the elevator car acquires the state parameters of the elevator car; the acquired state parameters are sent to a background monitoring system based on an MQTT protocol,
a02, the background monitoring system determines whether the current elevator car is normal according to the state parameters of the elevator car, and if not, alarm information is sent to a terminal/device held by an operator.
In this embodiment, the state parameters of the elevator car may include: the current bearing information of the elevator car, the brightness and temperature information inside the elevator car, the running state of the elevator car, the hall door information and/or the running index of the elevator car;
accordingly, the aforementioned step a02 may include: the backstage monitoring system basis the state parameter of elevator car, confirm whether operation of current elevator car is normal, include:
the first condition is that: the running state of the elevator car is an open state, the speed in the running index is 0, and the maintaining time of the open state is greater than the maximum maintaining time threshold;
the second condition is that: the running state of the elevator car is a closed state, and the variation range of the speed in the running index within first preset time is smaller than a first parameter range, or the variation range within second preset time is larger than a second parameter range;
a third condition: the temperature information of the elevator car exceeds a first temperature threshold value within a third preset time period;
a fourth condition: the bearing information of the elevator car exceeds the first weight value in a fourth preset time period;
a fifth condition: the conversion times of the brightness information of the elevator car in a fifth preset time period are greater than the preset times;
if any one of the first condition to the fifth condition is met, acquiring video information of the current elevator car, and displaying the video information to an operator;
if at least two conditions in the first condition to the fifth condition are met, video information of the elevator car in a sixth preset time period is stored, alarm information is sent to an operator, and meanwhile a danger instruction is sent to the elevator car, so that a danger alarm indicating lamp of the elevator car sends danger prompt information according to the danger instruction.
In the present application, the operating state of the elevator car, and the like are referred to as a car state. Further, if the operation state of the elevator car is an open state, it may mean that both the hall door and the car door are in an open state. In some embodiments, the running state of the car comprises the state that the car runs up and down in the shaft.
In practical applications, the monitoring module disposed within the elevator car may include: the device comprises a speed detection module, a brightness sensing module, a temperature sensing module, a distance sensing module and a weight monitoring module;
the speed detection module is embedded in the elevator car and used for obtaining operation indexes of the elevator car, wherein the operation indexes comprise car operation speed, car operation acceleration and/or car operation direction;
the distance sensing module is embedded in the elevator car and used for switching on and off the area of the landing door, and is used for detecting the running state of the landing door of the elevator car, and the running state comprises: the distance between the opened hall doors, the current position of the hall doors and the maintenance time of each state after the hall doors are opened;
the brightness sensing module is embedded in a key area of the elevator car and used for acquiring the brightness value in the elevator car;
the temperature sensing module is embedded in a key area of the elevator car and used for acquiring a temperature value in the car;
the weight monitoring module is embedded at the bottom of the elevator car and used for acquiring the bearing information of the elevator car;
the speed detection module, the brightness sensing module, the temperature sensing module, the distance sensing module and the weight monitoring module are all communicated with the background monitoring system based on an MQTT protocol, and information acquired in real time is transmitted to the background monitoring system.
Based on the monitoring module, the third condition further includes:
the temperature in the cage in the current state is greater than a preset standard temperature log [ (integral value of difference between the temperature in the cage and room temperature +1) × integral value of current state maintaining time ];
the temperature in the cage in the current state is less than a preset standard temperature log [ (an integer value of a difference value between room temperature and the temperature in the cage +1) — an integer value of current state maintaining time ] -5; the unit of the temperature in the lift car and the unit of the room temperature are both centigrade, and the unit of the current state maintaining time is second;
the current state maintaining time of the elevator car is equal to the current time-the current state starting time;
the operating state of the elevator car comprises: a hall door open state and a hall door closed state;
if the current state of the elevator car is a hall door opening state, determining the time when the distance between the hall doors is equal to the preset door opening distance as the starting time of the current state;
and if the current state of the elevator car is a hall door closing state, determining the time when the distance between the hall doors is less than the preset door opening distance as the current state starting time.
In a specific implementation process, each monitoring module arranged in the elevator car further comprises: the device comprises an infrared detection module and a position detection module;
after the background monitoring system sends a danger instruction to the elevator car, the background monitoring system starts the infrared detection module to acquire a detection signal of the infrared detection module;
judging whether passengers exist in the elevator car with the current dangerous event or not according to the detection signal of the infrared detection module;
if the passenger exists, detecting the position of the elevator car through a position detection module, and sending a departure prompting message to the passenger when the position of the elevator car reaches a determined safety floor and the elevator car is in an open state;
if no passenger is in the elevator car, a locking instruction is sent to the elevator car, and the elevator car is in a pause operation stage in a closed state after reaching a safe floor according to the locking instruction;
wherein the infrared detection module is located in a top area of the elevator car to monitor in-car occupant information;
the position detection module includes: scale and scale sensor, the scale hangs perpendicularly in the elevator well, the scale bottom links to each other with overspeed device tensioner, and the top at the car is installed to the scale sensor, the code that the scale sensor read on the scale with the positional information transmission of car extremely backstage monitored control system.
Further, the aforementioned operation index may include: the running speed of the car, the acceleration of the car and the running direction of the car;
the second condition includes: in a seventh preset time period, the average running speed of the lift car is higher than a preset speed threshold, and the highest running speed of the lift car is higher than a preset highest speed threshold;
and the time for getting out of the elevator car hall door to be in an open state is calculated in the process of calculating the average running speed of the elevator car.
According to the method, the prediction alarm can be carried out according to the operation indexes of the elevator car, the operation indexes of the car door and the state indexes in the car before the risk event occurs, and the risk is prevented from causing damage to personnel.
Furthermore, it should be noted that, each monitoring module in the elevator car in this application is all through MQTT agreement and backstage monitored control system promptly backstage monitoring server interaction, can realize miniaturized transmission, the overhead is little, and network flow is few, makes things convenient for the backstage monitored control system to realize the control to a plurality of elevator cars.
In another possible implementation manner, a driving control device of the elevator is arranged outside the elevator car, and the driving control device may be provided with a communication module for receiving an instruction of the background monitoring system, for example, the background monitoring system sends an instruction of descending to the elevator shaft, and the driving control device drives the elevator car to move to the elevator shaft, so that a safety detection person can perform safety detection on each component and structure of the elevator car, driving equipment, and the like.
Certainly, the background monitoring system of this embodiment can also predict the fault information that may exist in the current elevator car according to the state parameters of the current elevator car, so that the colleague sending the alarm signal can send the fault information that may exist to the handheld terminal of the operator.
In addition, in order to better understand the scheme of the present invention, the present invention further provides a background monitoring method for elevator operation, as shown in fig. 2, an execution subject of the method of this embodiment is a background monitoring system, and an implementation flow of the method includes the following steps:
s101, obtaining an operation index of an elevator car, an operation index of a car door (namely a landing door of the elevator car) and a state index in the car.
Wherein, the operation index of elevator car includes: car acceleration magnitude, car acceleration direction, car operating speed.
The operation indexes of the car door comprise: the distance between doors, the current state, and the current state holding time.
The status indicators in the car include: temperature in the car, brightness in the car.
All indexes in the step can be obtained through various sensors arranged on the elevator, and the embodiment does not specifically limit the types, the installation positions and the index obtaining schemes of the sensors.
In addition, the operating states of the elevator car can include an open state, a closed state, a moving state.
The current state and the current state maintaining time are determined by the following method:
current state holding time-current state start time.
And if the previous state is the opening state, determining the time when the distance between the two doors is equal to the preset door opening distance as the starting time of the current state, wherein the current state is the motion state.
And if the former state is a motion state, determining the time when the distance between the two doors is equal to 25 mm as the starting time of the current state, wherein the current state is a closed state. Or, determining the time when the distance between the two doors is equal to the preset door opening distance as the current state starting time, wherein the current state is the opening state.
And if the former state is the closed state, determining the time when the distance between the two doors is equal to 25 mm as the starting time of the current state, wherein the current state is the motion state.
And S102, determining whether a risk event exists according to the operation index of the elevator car, the operation index of the car door and the state index in the car.
This step is according to car acceleration, temperature in the car, and the interior luminance of car judges whether the risk incident appears before the risk takes place, and then has avoided the personnel injury that the risk brought.
In particular, the method comprises the following steps of,
1. based on car acceleration
1) If the car acceleration is 0, then
And S102-1-1, if the running speed of the car is not 0, determining that a risk event exists.
S102-1-2, if the running speed of the car is 0
And S102-1-2-1, if the current state is in an open state and the current state maintaining time is greater than a maximum maintaining time threshold value (1- | the temperature in the car/room temperature |), determining that a risk event exists.
And S102-1-2-2, if the current state is in a closed state and the current state maintaining time is greater than a maximum maintaining time threshold value [1- | temperature-36 degrees centigrade |/(| room temperature-36 degrees centigrade | +1) ], determining that a risk event exists.
S102-1-2-3, if the current state is the closed state, and
it is determined that a risk event exists.
And S102-1-2-4, if the current state is the motion state, determining whether a risk event exists according to the distance between doors.
Namely: and determining the motion speed v, the opening and closing force F and the door mass m of the car door at the current moment. If m 2 v2And determining that the risk event exists if the distance between the doors is not equal to F and a preset coefficient.
The preset coefficient can be set by a user, and can also be obtained by analyzing big data according to historical data. The maximum maintaining time threshold value can be set by a user, and can also be obtained by carrying out big data analysis according to historical data. The unit of brightness may be lux (lx) or other units, and this embodiment is not limited.
For example, if the room temperature is 37 degrees celsius and the temperature inside the car is 38 degrees celsius, and the current state is the open state and the current state maintaining time (2 seconds) is greater than the maximum maintaining time threshold value (1- |38/37|), it is determined that a risk event exists. If the current state is an off state and the current state maintenance time (2 seconds) is greater than a maximum maintenance time threshold value [1- | 38-36 degrees centigrade |/(| 37-36 degrees centigrade | +1) ], determining that a risk event exists.
2) The magnitude of the car acceleration is not 0, then
And S102-2-1, if the running speed of the car is higher than a preset speed threshold value, determining that a risk event exists.
S102-2-2, if the running speed of the car is not higher than the preset speed threshold value, the car runs at a speed higher than the preset speed threshold value
And S102-2-2-1, if the current state is not the closed state, determining that a risk event exists.
And S102-2-2-2, if the current state is the closing state, determining that a risk event exists if the acceleration direction of the car is upward and the running speed of the car is greater than or equal to a maximum speed threshold value (1- | temperature in the car/room temperature | current maintenance time/60).
S102-2-2-3, if the current state is the closing state, if the acceleration direction of the lift car is upward, and
it is determined that a risk event exists.
And S102-2-2-4, if the current state is the closed state, determining that a risk event exists if the acceleration direction of the car is upward and the running speed of the car is greater than or equal to a maximum speed threshold value (1-speed influence parameter | temperature in the car/room temperature | current maintenance time/60).
S102-2-2-5, if the current state is the closing state, if the acceleration direction of the lift car is downward, then
It is determined that a risk event exists.
And the speed influence parameter is 2, the maximum speed threshold value/the current state maintaining time and the acceleration magnitude.
The preset speed threshold value can be set by a user, and can also be obtained by performing big data analysis according to historical data. The maximum speed threshold value can be set by a user, and can also be obtained by carrying out big data analysis according to historical data.
For example, the room temperature is 37 degrees celsius, the temperature in the car is 38 degrees celsius, and the current holding time is 2 seconds, if the current state is the closed state, it is determined that the risk event exists if the car acceleration direction is upward and the car running speed is greater than or equal to the maximum speed threshold value (1- |38/30| 2/60).
2. Judging according to the temperature in the car
S102-3-1, determining that a risk event exists if the temperature in the car is greater than the standard temperature log [ (integral value of difference between the temperature in the car and the room temperature +1) × integral value of current state maintenance time ].
S102-3-2, determining that a risk event exists if the temperature in the car < standard temperature log [ (integral value of difference between the temperature in the car and room temperature +1) × integral value of current state maintenance time ] -5.
The unit of the temperature in the lift car and the unit of the room temperature are both centigrade, and the unit of the current state maintaining time is second.
The standard temperature may be set by a user, or may be obtained by analyzing big data according to historical data.
For example, if the room temperature is 37 degrees celsius, the car interior temperature is 38 degrees celsius, and the current maintenance time is 2 seconds, the difference between the car interior temperature 38 and the room temperature 37 is 1, which is an integer value of 1, and the current state maintenance time is 2 seconds, which is an integer value of 2. Then if 38 degrees >37 log [ (1+1) × 2], then it is determined that a risk event is present.
For example, if the room temperature is 37.5 degrees celsius, the car interior temperature is 38 degrees celsius, and the current maintenance time is 2.1 seconds, the difference between the car interior temperature 38 and the room temperature 37.5 is 0.5, and the current state maintenance time is 2.1 seconds, which is an integer value of 2 and is an integer value of 0. If 38 degrees >37 log [ (0+1) × 2], then it is determined that a risk event is present.
3. According to brightness judgment in the car
S102-4-1, determining that a risk event exists if the brightness in the car is greater than the standard brightness log (the temperature in the car/room temperature integral value of the current state maintenance time).
S102-4-2, determining that a risk event exists if the brightness in the car < standard brightness log [ (car interior temperature-5)/room temperature integral value of current state maintenance time ].
The unit of the temperature in the lift car and the unit of the room temperature are both in centigrade, and the unit of the current state maintaining time is in seconds.
And S103, if the risk event exists, alarming. The method provided by the embodiment can carry out prediction alarm according to the operation indexes of the elevator car, the operation indexes of the car door and the state indexes in the car before the risk event occurs, so that the risk occurrence is avoided, and the injury to personnel is avoided.
The methods shown in fig. 1 and 2 can be supplemented with each other, combined with each other, and are not limited to them individually.
According to another aspect of the present invention, the present invention provides another embodiment to better understand the aforementioned information of the bending times and bending positions.
As shown in fig. 3, the length L1 of a wire rope wound around a traction sheave during the operation of the elevator is obtained according to the formula (a); wherein L1 is the length of the steel wire rope from the first contact geometric tangent point 1 of the steel wire rope and the traction sheave to the second contact geometric tangent point 2 of the steel wire rope and the traction sheave;
formula (a):
wherein a: representing the wrap angle of the steel wire rope and the traction sheave; d1: indicating the diameter of the traction sheave.
Acquiring the length L2 of a steel wire rope between a traction sheave and a guide sheave in the running process of the elevator according to the formula (b);
formula (b):
OL: the distance between the center of the traction wheel and the center of the guide wheel; d2: indicating the diameter of the guide wheel.
Acquiring the length L3 of a steel wire rope wound on a guide wheel in the running process of the elevator according to the formula (c); wherein L3 is the length of the steel wire rope from the first contact geometric tangent point 3 position of the steel wire rope and the guide wheel to the second contact geometric tangent point 4 position of the steel wire rope and the guide wheel;
formula (c):
beta: and the wrap angle of the steel wire rope and the guide wheel is shown.
From this, the pulley wire length LSWherein L isS＝L1+L2+L3。
In order to better explain the processing process of the background server, the whole length of the elevator steel wire rope is subjected to coordinate processing, and a steel wire rope whole length position coordinate h interval is constructed.
As shown in fig. 4, in the case where the elevator is in the ascending operation, the current number of floors of the elevator in this embodiment is assumed to be a, S is the elevator floor height, N is the total number of floors, and b is the number of floors.
Then obtaining the position coordinate Hi of the steel wire rope corresponding to the current floor number, the length value delta Hi of the steel wire rope in the current action and the coordinate h of the target floor numberi±ΔHi。
As shown in fig. 4, in this embodiment, the position coordinate Hi of the wire rope corresponding to the current floor is specifically ha, where ha is (N-a) × S, then the length value Δ Hi of the current action wire rope is specifically Δ H1, where Δ H1 is S × | b-a |, and the target floor coordinate Hi±ΔHiSpecifically ha- Δ H1.
As shown in fig. 4, when it is known that a sheave wire line Ls exists on the traction sheave and the guide sheave and between the traction sheave and the guide sheave when the elevator is at a floor, the coordinates of the sheave wire line during a period are expressed as (ha, ha + Ls) in the process of the elevator increasing from the current floor a to the number of floors b. When the number of layers b is reached, the coordinate at ha in fig. 4 becomes ha- Δ H1, and at this time, the pulley wire rope Ls still exists on the pulley, and the coordinate of the pulley wire rope is expressed as (ha- Δ H1, ha- Δ H1+ Ls).
As shown in fig. 5, in the case where the elevator is in the descending operation, it is assumed that the current floor of the elevator is c, the height of the elevator floor is S, the total floor is N, and the destination floor is d in this embodiment.
Then obtaining the position coordinate Hi of the steel wire rope corresponding to the current floor number, the length value delta Hi of the steel wire rope in the current action and the coordinate h of the target floor numberi±ΔHi。
As shown in fig. 5, in this embodiment, the position coordinate hi of the wire rope corresponding to the current floor is specifically hc, where hc is (N-c) × S; then the length value Δ Hi of the current action steel wire rope is specifically Δ H2, where Δ H2 ═ sxi d-c |; and target layer number coordinate hi±ΔHiSpecifically hc- Δ H2.
As shown in fig. 5, when the elevator is going down from the current floor number c to the target floor number d, it is known that a sheave wire Ls exists on the traction sheave and the guide sheave and between the traction sheave and the guide sheave when the elevator is at the floor c, and the coordinates of the sheave wire Ls are represented as (hc, hc + Ls). When the number of layers d reaches the number of layers, the coordinates at hc in FIG. 5 are changed to hc- Δ H2, and at this time, the pulley wire rope Ls still exists on the pulley, and the coordinates of the wire rope are expressed as (hc- Δ H2, hc- Δ H2+ Ls).
The influence of elevator operation leveling error factors under actual conditions is considered, so that the length of an action steel wire rope in actual operation generates errors. In the embodiment, the error amount +/-delta is expanded for the upper and lower bounds of the operation segmented interval, and 1 is added to the bending times of the steel wire rope at the position of the error interval.
When the elevator is in the ascending process, the current floor number a is smaller than the target floor number b, and the total length forward bending times of the steel wire rope in the ascending process of the elevator are obtained according to the formula (1);
formula (1)
Wherein, ± Δ is the upper and lower bound extension error of the operation segment interval. ha- Δ H1- Δ represents the error position coordinates.
When the elevator is in the ascending process, if the current floor number a is smaller than the target floor number b, acquiring the total length reverse bending times of the steel wire rope in the ascending process of the elevator according to the formula (2);
formula (2)
Wherein ha- Δ H1+ Ls- Δ in the formula (2) represents the error position coordinates.
In practical applications, in this embodiment, the bending times of the partial positions are different in the same action wire rope length Δ H1.
In addition, as shown in fig. 5, when the elevator is in a descending process, and the current floor number c is greater than the target floor number d, the total length forward bending times of the steel wire rope in the descending process of the elevator is obtained according to the formula (3);
formula (3):
the elevator is in a descending process, the current floor number c is larger than the target floor number d, and the total length forward bending times of the steel wire rope in the descending process of the elevator are obtained according to the formula (4);
formula (4):
in practical application, the bending times of the parts are different in the same action steel wire rope length delta H2.
Therefore, the total bending times of the steel wire rope in the ascending operation of the elevator are obtained according to the formula (5) based on the forward bending times and the reverse bending times of the steel wire rope in the ascending process of the elevator;
formula (5):
the forward and reverse bending times of the steel wire rope in the descending process of the elevator are calculated according to a formula (6)
Acquiring the total bending times of the steel wire rope in descending operation of the elevator;
formula (6):
acquiring a residual life value, namely a bending fatigue value, of the steel wire rope according to a formula (7) based on the total bending times Nw of all positions of the steel wire rope in the running process of the elevator;
formula (7): t isL＝TS-Max(Nw)；
Wherein, TSThe steel wire bending test value is obtained; t isLMax (nw) is the maximum total bending times of the steel wire rope at all positions.
In practical application, the background server can judge whether the residual life value of the steel wire rope is less than or equal to a preset safety threshold, and if the residual life value of the steel wire rope is less than or equal to the preset safety threshold, early warning information/warning information is sent to an operator, so that the operator, namely an elevator manager, can overhaul the elevator steel wire rope.
In the embodiment, the wrap angles of the traction sheave and the guide sheave are different in practical situation, and the bending degrees of the steel wire rope are different, so that the forward bending times and the reverse bending times of the elevator steel wire rope passing through the traction sheave and the guide sheave with different wrap angles can be calculated, an accurate calculation result is obtained, the bending damage times of the pulleys on the whole length of the steel wire rope in the running process of the elevator can be represented, and the working efficiency of elevator workers is improved.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A background monitoring method of elevator operation, comprising:
each monitoring module arranged in the elevator car acquires state parameters of the elevator car; the acquired state parameters are sent to a background monitoring system based on an MQTT protocol, the background monitoring system determines whether the current elevator car is normal or not according to the state parameters of the elevator car, and if not, alarm information is sent to an operator;
the state parameters include: the current bearing information of the elevator car, the brightness and temperature information inside the elevator car, the running state/car state of the elevator car, the hall door information and/or the running index of the elevator car;
the backstage monitored control system according to the state parameter of elevator car, confirm whether the operation of current elevator car is normal, include:
the first condition is that: the running state of the elevator car is a hall door opening state, the speed in the running index is 0, and the maintaining time of the hall door opening state is greater than the maximum maintaining time threshold value;
the second condition is that: the running state of the elevator car is a hall door closing state, and the variation range of the speed in the running index within first preset time is smaller than a first parameter range, or the variation range within second preset time is larger than a second parameter range;
a third condition: the temperature information of the elevator car exceeds a first temperature threshold value within a third preset time period;
a fourth condition: the bearing information of the elevator car exceeds the first weight value in a fourth preset time period;
a fifth condition: the conversion times of the brightness information of the elevator car in a fifth preset time period are greater than the preset times;
if any one of the first condition to the fifth condition is met, acquiring video information of the current elevator car, and displaying the video information to an operator;
if at least two conditions in the first condition to the fifth condition are met, video information of the elevator car in a sixth preset time period is stored, alarm information is sent to a terminal held by an operator, and a danger instruction is sent to the elevator car, so that a danger alarm indicating lamp of the elevator car sends danger prompt information according to the danger instruction.
2. The method of claim 1, wherein a monitoring module disposed within the elevator car comprises: the device comprises a speed detection module, a brightness sensing module, a temperature sensing module, a distance sensing module and a weight monitoring module;
the speed detection module is embedded in a rotary encoder of a traction machine of an elevator and is used for acquiring operation indexes of an elevator car, wherein the operation indexes comprise car operation speed, car operation acceleration and/or car operation direction;
the distance sensing module is embedded in the inner side of a car door of the elevator car and used for detecting the running state of a hall door of the elevator car, and the running state comprises: the distance between the opened hall doors, the current position of the hall doors and the maintenance time of each state after the hall doors are opened; and detecting information whether a person enters the car;
the brightness sensing module is embedded in a key area of the elevator car and used for acquiring the brightness value in the elevator car;
the temperature sensing module is embedded in a key area of the elevator car and used for acquiring a temperature value in the car;
the weight monitoring module is embedded in a bottom car frame of the elevator car and used for acquiring bearing information of the elevator car;
the speed detection module, the brightness sensing module, the temperature sensing module, the distance sensing module and the weight monitoring module are all communicated with the background monitoring system based on an MQTT protocol, and information acquired in real time is transmitted to the background monitoring system.
3. The method of claim 1, wherein the third condition further comprises:
the temperature in the cage in the current state is greater than a preset standard temperature log [ (integral value of difference between the temperature in the cage and room temperature +1) × integral value of current state maintaining time ];
the temperature in the cage in the current state is less than a preset standard temperature log [ (an integer value of a difference value between room temperature and the temperature in the cage +1) — an integer value of current state maintaining time ] -5; the unit of the temperature in the lift car and the unit of the room temperature are both centigrade, and the unit of the current state maintaining time is second;
the current state maintaining time of the elevator car is equal to the current time-the current state starting time;
the operating state of the elevator car comprises: a hall door open state and a hall door closed state;
if the current state of the elevator car is a hall door opening state, determining the time when the distance between the hall doors is equal to the preset door opening distance as the starting time of the current state;
and if the current state of the elevator car is a hall door closing state, determining the time when the distance between the hall doors is less than the preset door opening distance as the current state starting time.
4. The method of any of claims 1 to 3, wherein each monitoring module disposed within the elevator car further comprises: the device comprises an infrared detection module and a position detection module;
after the background monitoring system sends a danger instruction to the elevator car, the background monitoring system starts the infrared detection module to acquire a detection signal of the infrared detection module;
judging whether passengers exist in the elevator car with the current dangerous event or not according to the detection signal of the infrared detection module;
if the passenger exists, detecting the position of the elevator car through a position detection module, and sending a departure prompting message to the passenger when the position of the elevator car reaches a determined safety floor and the elevator car is in an open state;
if no passenger is in the elevator car, a locking instruction is sent to the elevator car, and the elevator car is in a pause operation stage in a closed state after reaching a safe floor according to the locking instruction;
wherein the infrared detection module is located in a top area of the elevator car to monitor in-car occupant information;
the position detection module includes: scale and scale sensor, the scale hangs perpendicularly in the elevator well, the scale bottom links to each other with overspeed device tensioner, and the top at the car is installed to the scale sensor, the code that the scale sensor read on the scale with the positional information transmission of car extremely backstage monitored control system.
5. The method of claim 1, wherein the operational indicators comprise:
the running speed of the car, the acceleration of the car and the running direction of the car;
the second condition includes:
in a seventh preset time period, the average running speed of the lift car is higher than a preset speed threshold, and the highest running speed of the lift car is higher than a preset highest speed threshold;
and the time for getting out of the elevator car hall door to be in an open state is calculated in the process of calculating the average running speed of the elevator car.
6. The method of claim 1, wherein the background monitoring system is further configured to periodically perform image processing on the video information, and send an alarm message to a terminal held by an operator if an abnormal phenomenon is identified in the image processing.
7. The method of claim 1, wherein the state parameters further comprise:
the information of various arriving floors of the elevator movement in each calculation time period;
accordingly, the method further comprises:
the background monitoring system acquires the bending times of the elevator steel wire rope at the specified position in the calculation time period of the current elevator and the maximum bending position information according to various arriving floor information of the elevator motion in each calculation time period and basic information which is pre-stored in the background monitoring system and belongs to the elevator;
the background monitoring system acquires the bending fatigue value of the elevator in the calculation time period according to the bending times and the maximum bending position information;
and the background monitoring system determines whether the current elevator runs normally according to the bending fatigue value.
8. The method of claim 7, wherein obtaining the current number of times the elevator rope bends at a specified position within the calculation time period, and the maximum bending position information comprises:
the method comprises the following steps that the elevator passes through N ascending processes and M descending processes in a calculation time period, and the bending times Nw are obtained according to the following formula I;
the formula I is as follows:
specifically, the total bending times of the total length of the steel wire rope in the j-th descending operation of the elevator are as follows:
the total bending times of the steel wire rope in the ith ascending operation of the elevator are as follows:
wherein, the elevator rises the in-process steel wire rope overall length forward bending number of times for the ith time:
the total length reverse bending times of the steel wire rope in the ith ascending process of the elevator are as follows:
the total length of the steel wire rope is positively bent for the number of times in the j-th descending process of the elevator:
the total length reverse bending times of the steel wire rope in the j-th descending process of the elevator are as follows:
L1the length L of a steel wire rope wound on a traction sheave in the running process of the elevator2The length of a steel wire rope between a traction sheave and a guide wheel in the running of the elevator, Ls is the length of a steel wire rope of a pulley in the running of the elevator, i is the current ith ascending running process of the elevator in a calculation time period, aiInitial floor number b for i-th ascending operation process of elevatoriThe number of floors for the ith ascending operation process of the elevator, H is the coordinate of the full length position of the steel wire rope, H is the coordinate of the upper part of the rope at the joint of the top of the counterweight and the steel wire rope, and hi is the initial number of floors a in the ith ascending operation process of the elevatoriCorresponding position coordinates, delta hi, the length value of the action steel wire rope in the ith ascending operation process of the elevator, and +/-delta, the upper and lower bound expansion error of the operation segmented interval;
j is the current j-th descending operation process of the elevator, ajInitial floor number b for j-th descending operation process of elevatorjThe number of floors for the j descending operation process of the elevator and hj is the initial number of floors a in the j descending operation process of the elevatorjAnd the corresponding position coordinate and the corresponding delta Hj are the length values of the action steel wire rope in the j-th descending operation process of the elevator.
9. The method of claim 8, wherein the background monitoring system obtains the bending fatigue value of the elevator in the calculation time period according to the bending times and the maximum bending position information:
determining a bending fatigue value according to the following formula;
TL＝TS-Max(Nw)
wherein, TSThe test value is a preset steel wire bending test value; t isLIs the bending fatigue value;
max (nw) is the maximum total number of bends at each position along the length of the cord.
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