CN115385209A

CN115385209A - Alarm and password removing method for abnormal opening of elevator door

Info

Publication number: CN115385209A
Application number: CN202110568495.8A
Authority: CN
Inventors: 王雪峰; 原振淇; 公智远; 周琪翔; 韩雅洁
Original assignee: Taiyuan University of Technology
Current assignee: Taiyuan University of Technology
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-11-25
Anticipated expiration: 2041-05-25
Also published as: CN115385209B

Abstract

The invention relates to the technical field of elevator safety. An alarm and password removing method for abnormal opening of an elevator door comprises a step of judging whether the elevator door is abnormally opened or not and a step of removing locking of a password. The invention can minimize the possibility of casualties possibly caused by abnormal opening of the elevator door by two means of reminding people of abnormal state of the elevator after the elevator is abnormally opened and communicating with the elevator to control the elevator door to continue to abnormally open and alarm.

Description

Alarm and password removing method for abnormal opening of elevator door

Technical Field

The invention relates to the technical field of elevator safety.

Background

In 2018, the office hall of the State department issues an opinion on work for enhancing the quality and safety of elevators, the document indicates that the elevators are special equipment which is most frequently contacted and used by people, 561 ten thousand elevators are reserved in China, and the reserved quantity, the annual output and the new increment of the elevators are all the first in the world. In 2020, an elevator quality safety working system with sound regulation standard, clear safety responsibility, effective working measures, complete supervision mechanism and social co-participation is formed, the elevator quality safety level is comprehensively improved, the safety situation is continuously and stably improved, and indexes such as the starting number of accidents and the number of dead people of the elevator are close to the level of developed countries. However, the elevator safety accident is still a problem which needs to be solved urgently, particularly, with the increase of the number of elevators in China in recent years, the elevator holding amount is large, and the monitoring and processing requirements on the elevator safety condition cannot be ignored.

In recent years, accidents such as falling of a person into a hoistway or shearing of a person due to a failure of an elevator hall door have occurred. Therefore, it is necessary to enhance the research on the monitoring and alarming technology of the abnormal opening state of the elevator hall door and prevent the personnel from falling down due to the abnormal opening of the hall door to the maximum extent. However, most elevators have sound and light alarm systems based on elevator systems, and on the basis of the previous alarm system research, the elevator door opening is restricted under the condition that the elevator is abnormally opened, so that the elevator door which is not in a safe state is limited to be opened to a certain extent. The safety of people is protected to the maximum extent while people are reminded of paying attention to the safety.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to solve the elevator accident caused by the elevator door fault.

The technical scheme adopted by the invention is as follows: an alarm and password removing method for abnormal opening of an elevator door comprises the following steps

Judging whether the elevator door is abnormally opened or not, and the specific steps are as follows

S1, judging whether an opened elevator door exists or not by a PLC (programmable logic controller) through a door sensor every rated time (less than 50 ms);

s2, if the opened elevator door does not exist, returning to the step S1, if the opened elevator door exists, judging whether the elevator car reaches the specified position of the floor with the opened elevator door by the elevator car sensor by the PLC, if so, returning to the step S1, otherwise, jumping to the step S3;

s3, the PLC controls the sound-light alarm of the floor with the opened elevator door to give an alarm, the PLC sends information to the elevator control system to realize that the opened elevator door is closed and the elevator is in a locking state, and simultaneously the PLC sends data containing abnormal opening information of the elevator door to the internet cloud platform in a wireless or wired mode; the data is transmitted to the designated server wirelessly through the 4G network by using the existing 4G DTU and other devices. And the internet cloud platform analyzes the data after the appointed server receives the related data, makes corresponding action on the appointed data, and sends corresponding information to preset personnel by utilizing the existing API.

S4, after receiving data containing abnormal opening information of the elevator door, the Internet cloud platform sends the information to an elevator manager or property;

a step of unlocking the lock by the password, when the maintenance personnel finishes the maintenance of the elevator (communication modes such as telephone and WeChat of elevator managers and property are reserved in a cloud platform database connected by the PLC, and information is sent by the communication modes such as telephone and WeChat), the locking state of the elevator is unlocked by the following steps

M1, the PLC judges whether a password releasing input key of the elevator is pressed down, if not, the PLC continues to judge, and if yes, the PLC jumps to the step M2;

step M2, the PLC judges whether a first key K1 corresponding to the password is pressed, meanwhile, a timer starts to time from zero, if the first key K1 is pressed, the step M3 is skipped, if the first key K1 is not pressed, the judgment is continued, and after the timer judges that the time exceeds 5S, the step M2 is skipped again to start;

m3, the PLC judges whether a second key K2 corresponding to the password is pressed down, and meanwhile, the timer keeps timing;

step M4, if the second key K2 corresponding to the password is not pressed, judging whether the timing of the timer exceeds 5S, if the timing of the timer exceeds 5S, jumping to the step M2, if the timing of the timer does not exceed 5S, immediately jumping to the step M3, if the timing of the second key K2 corresponding to the password is pressed, judging whether the timing of the timer exceeds 5S, if the timing of the timer exceeds 5S, jumping to the step M2, and if the timing of the timer does not exceed 5S, jumping to the step M5;

m5, the PLC judges whether a third key K3 corresponding to the password is pressed down, and meanwhile, the timer keeps timing;

step M6, if the third key K3 corresponding to the password is not pressed, judging whether the timing of the timer exceeds 5S, if the timing of the timer exceeds 5S, jumping to step M2, if the timing of the timer does not exceed 5S, immediately jumping to step M5, if the third key K3 corresponding to the password is pressed, judging whether the timing of the timer exceeds 5S, if the timing of the timer exceeds 5S, jumping to step M2, and if the timing of the timer does not exceed 5S, jumping to step M7;

step M7, detecting the next key corresponding to the password by the same method from the step M2 to the step M6, and jumping to the step M8 only after all keys corresponding to the detected password are pressed;

and M8, the PLC releases the elevator locking state, and the PLC controls the acousto-optic alarm of the floor of the elevator door to release the alarm. The door sensor is one of a proximity switch sensor, a photoelectric sensor, an infrared sensor and a microwave sensor installed on each elevator door of each floor.

The elevator car sensor is one of a proximity switch sensor, a photoelectric sensor, an infrared sensor and a microwave sensor installed on an elevator track and on the elevator car at each elevator door of each floor.

Each key of the password releasing input key of the elevator is a switch, when the switch is turned on, the key is not pressed, when the switch is pressed, the key is pressed, each key is connected with the PLC, and the PLC can obtain the pressed information of the key by monitoring the key-on state.

The beneficial effects of the invention are: the invention can minimize the possibility of casualties possibly caused by abnormal opening of the elevator door by two means of reminding people of abnormal state of the elevator after the elevator is abnormally opened and communicating with the elevator to control the elevator door to continue to abnormally open and alarm. In addition, the system is networked, so that abnormal information of the elevator can be notified to relevant personnel at the first time, a password unlocking system matched with maintainers is designed, and the remote alarm function of the system is also developed, so that the system is expanded from abnormal opening of the protection elevator to taking of the elevator, and various conditions such as danger and the like are possibly caused.

Drawings

FIG. 1 is a schematic wiring diagram of components of a detection control system provided by an embodiment;

FIG. 2 is a schematic wiring diagram of the detection control system and the elevator control system provided by the embodiment;

fig. 3 is a schematic wiring diagram of components provided by the embodiment.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and its several details are capable of modifications and variations in various respects, all without departing from the spirit of the invention. It is noted that the features in the following examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components actually implemented, and the form, quantity and proportion of the components may be changed arbitrarily and the layout of the components may be more complicated.

The invention aims to provide a detection method and a detection system for detecting abnormal opening of an elevator door aiming at supplement of the existing elevator safety technology, which can be used for early warning the abnormal opening of the elevator door, carrying out risk control on dangers existing in the elevator and conveniently maintaining a risk-relieving control system.

The embodiment provides a detection method for early warning of abnormal opening of an elevator door, which comprises the following steps:

s1, judging whether an opened elevator door exists or not by a PLC (programmable logic controller) through a door sensor every rated time;

s2, if the opened elevator door does not exist, returning to the step S1, if the opened elevator door exists, judging whether the elevator car reaches the specified position of the floor with the opened elevator door by the PLC through an elevator car sensor, if so, returning to the step S1, otherwise, jumping to the step S3;

s3, the PLC controls the sound-light alarm of the floor with the opened elevator door to give an alarm, the PLC sends information to the elevator control system to realize that the opened elevator door is closed and the elevator is in a locking state, and simultaneously the PLC sends data containing abnormal opening information of the elevator door to the internet cloud platform in a wireless or wired mode;

and S4, after receiving the data containing the abnormal opening information of the elevator door, the Internet cloud platform sends the information to elevator management personnel or property.

The execution main body of the detection method for early warning of one-door opening of the elevator door in the embodiment is a detection control system, and the steps S1 to S4 are executed through the detection control system.

It should be noted that the main body of the detection control system in this embodiment is a commercially available Programmable Logic Controller (PLC) with an RS-485 communication module, which can support multiple sets of programs to work in parallel, and is attached with multiple timers, and the main body of the detection control system is provided with multiple switching value input points, multiple relay output type switch contacts, and an RS-485 communication interface. And a DTU module responsible for communicating with the Internet, wherein the DTU module is a wireless terminal device specially used for converting serial port data into IP data or converting the IP data into the serial port data and transmitting the serial port data through a wireless communication network, and a 4G DTU module (DTU) which is provided with an RS-485 interface to support the conversion of the RS-485 serial port data and is used for communicating with a fourth generation mobile phone communication network is commonly used in the example. The cloud platform is selected from various cloud service platforms in the market, is set up in the example, can convert the serial port data abnormity transmitted by the DTU into the switch information of the input points of the programmable logic controller and the output information of the relay, and can automatically set conditions to contact preset contacts. The DTU converts and uploads the collected PLC operation data to a cloud platform related server, and the real-time effective monitoring of elevator states and the control of a detection control system by related personnel are achieved by combining with cloud platform related application software.

Firstly, the PLC of the detection control system main body judges whether the elevator door is opened or not by using the door sensor on the basis of combining the DTU, and judges whether the elevator car is at the appointed position of the opening floor of the elevator door or not by using the car sensor after the elevator door is opened.

Wherein the door sensor and the car sensor may be, but are not limited to, a switch type sensor, a photoelectric sensor, an infrared sensor, and a microwave sensor.

Wherein, because of the car sensor position is difficult to daily maintenance to arrive, need prevent the abnormal conditions that probably appear simultaneously, the car sensor of each floor needs two at least at different vertical height.

If the elevator door is opened, and meanwhile, the car sensor detects that the car is not at the appointed floor where the elevator door is opened, the PLC is connected with the relay of the voice alarm and the audible and visual alarm through switching on, and the voice alarm and the audible and visual alarm start to work at the moment to remind the passengers to pay attention to safety, for example, the voice alarm broadcasts warning, danger exists when the elevator is used, and the passengers pay attention to safety.

The voice alarm in the embodiment is a voice player which is provided on the market and is provided with a built-in voice memory and abnormally plays voice in the memory when being connected with a power supply, and the audible and visual alarm is a common audible and visual alarm which sends out buzzing sound and red light flickering when being connected with the power supply on the market. Wherein, the voice alarm, the audible and visual alarm can be but not limited to the above devices in the present example.

In the alarming process, the state of a relay end of a PLC (programmable logic controller) connected with an alarming device changes, the state is changed from off to on, the PLC can send serial port data of the changed port and changed information to a DTU (data transfer unit), the DTU converts the serial port data into IP (Internet protocol) data and sends the IP data to a server of a connected cloud platform, cloud platform related software sends elevator abnormal opening to appointed personnel, and three alarming modules start information, so that related technicians or responsible personnel can obtain the elevator abnormal information in the first time, and the related personnel can take measures to avoid accidents or control the expansion of casualty accidents in the first time.

The embodiment provides an example of a method for controlling an elevator door to stop opening by communicating with an elevator after a detection control system in the first embodiment detects an abnormality through a simple elevator model, and the example of the method for controlling the elevator door to stop opening includes the following steps:

step M1, after receiving information that maintenance personnel finish overhauling the elevator, the PLC judges whether a password releasing input key of the elevator is pressed down, if not, jumps to step M1 again after waiting for 5S, and if yes, jumps to step M2;

It should be noted that the elevator control system in this embodiment is only a simple elevator system, and the main body of the elevator control system in this example is a programmable logic controller with 2-way high-speed pulse output and multiple switching value input points, and two sets of stepping motors and drivers, one lead screw and a double-sliding-table lead screw, and the programmable logic controller with high-speed pulse output can control the stepping motors by connecting the drivers, and the stepping motor 1 cooperates with the double-sliding-table lead screw to form a simple elevator door, and the stepping motor cooperates with the lead screw to form a simple car.

It should be added that the stepping motor is an electric motor that converts an electric pulse signal into a corresponding angular or linear displacement. The rotor rotates an angle or one step before inputting a pulse signal, the output angular displacement or linear displacement is proportional to the input pulse number, and the rotating speed is proportional to the pulse frequency. Therefore, when the programmable logic control system of the elevator control system stops outputting the pulse signal, the stepping motor stops rotating, and meanwhile, due to the magnetic force effect between the stator and the rotor of the stepping motor when the stepping motor normally works, even if the programmable logic controller stops outputting the pulse signal, the stepping motor stops rotating, the stepping motor can not rotate freely due to the moment effect of the stepping motor, which is shown in that the double sliding tables can not move, so that two elevator doors connected with the double sliding tables stop moving.

First, the detection control system in the example detects that the elevator door is open and the car is at the designated location of the open floor, and the programmable logic controller of the detection control system sends a signal to the elevator control system through a relay connected to the programmable logic controller of the elevator control system.

And the switching value interface of the programmable logic controller of the elevator control system receives a signal sent by the detection control system and executes a command of stopping the output of the high pulse signal, so that the stepping motor stops rotating, the double sliding tables of the screw rod stop moving, and the elevator door connected with the double sliding tables of the screw rod stops moving.

In this example, the elevator model and the elevator control system include but are not limited to this type, and it is described in this example that the detection control system sends the information of stopping the elevator running to the elevator control system, and different methods should be adopted for stopping the opening of the elevator door for different elevators.

It should be noted that the components in this example are common products in the market, for example, the switches K1, K2, K3, and K4 are push switches in this example. Meanwhile, the switches K1 to K4 are only examples, and are not limited to four switches in this method. The main judgment unit in this embodiment is a Programmable Logic Controller (PLC) that detects and controls the main control unit in the first embodiment, and judges whether or not the switch is pressed by judging the on state of the switching value input points to which the switches K1, K2, K3, and K4 are connected, respectively.

Wherein the preset input time limit is 5s, as shown in the step, other times can be set.

It should be noted that in the example, the information is sent to the elevator control system by the elevator receiving detection control system through the relay connected with the input point of the opening and closing amount of the elevator control system, and the elevator control system receives the information of the opening and closing amount and then executes the command of closing the elevator door.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of many obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for alarming and clearing a password when an elevator door is abnormally opened is characterized in that: comprises the following steps

s3, the PLC controls the sound and light alarm device of the floor with the opened elevator door to give an alarm, the PLC controls the opened elevator door to close and enables the elevator to be in a locking state, and meanwhile, the PLC sends data containing abnormal opening information of the elevator door to the internet cloud platform in a wireless or wired mode;

s4, after receiving data containing abnormal opening information of the elevator door, the Internet cloud platform sends the information to elevator management personnel or property;

a step of unlocking the lock by the password, when the maintenance personnel finishes the maintenance of the elevator, the lock state of the elevator is unlocked by the following steps

M1, the PLC judges whether a password release input key of the elevator is pressed, if not, the judgment is continued, and if yes, the step M2 is skipped;

m3, the PLC judges whether a second key K2 corresponding to the password is pressed down;

m5, the PLC judges whether a third key K3 corresponding to the password is pressed down;

step M6, if the third key K3 corresponding to the password is not pressed, judging whether the time counted by the timer exceeds 5S, if the time counted by the timer exceeds 5S, jumping to the step M2, if the time counted by the timer does not exceed 5S, immediately jumping to the step M5, if the third key K3 corresponding to the password is pressed, judging whether the time counted by the timer exceeds 5S, if the time counted by the timer exceeds 5S, jumping to the step M2, and if the time counted by the timer does not exceed 5S, jumping to the step M7;

and M8, the PLC sends information to the elevator control system, the elevator control system releases the elevator locking state, and the PLC controls the acousto-optic alarm of the floor of the elevator door to release the alarm.

2. The method for alarming and clearing the password when the elevator door is abnormally opened according to claim 1, characterized in that: the door sensor is one of a proximity switch sensor, a photoelectric sensor, an infrared sensor and a microwave sensor installed on each elevator door of each floor.

3. The method for alarming and clearing the password when the elevator door is abnormally opened according to claim 1, characterized in that: the elevator car sensor is one of a proximity switch sensor, a photoelectric sensor, an infrared sensor and a microwave sensor installed on an elevator track and on the elevator car at each elevator door of each floor.

4. The method for alarming and clearing the password when the elevator door is abnormally opened according to claim 1, characterized in that: each key of the password releasing input key of the elevator is a switch, when the switch is turned on, the key is not pressed, when the switch is turned off, the key is pressed, each key is connected with the PLC, and the PLC can obtain the pressed state of the key by monitoring the on state of the key.