WO2021052396A1

WO2021052396A1 - Method and apparatus for detecting clamping of foreign object between elevator doors, and computer device

Info

Publication number: WO2021052396A1
Application number: PCT/CN2020/115775
Authority: WO
Inventors: 赖敏桂; 刘贤钊; 张彩霞; 黄立明; 仲兆峰; 潘海华
Original assignee: 日立楼宇技术（广州）有限公司
Priority date: 2019-09-20
Filing date: 2020-09-17
Publication date: 2021-03-25
Also published as: CN110723616A; CN110723616B; JP2022548766A; JP7280437B2

Abstract

A method and apparatus for detecting clamping of a foreign object (404) between elevator doors, and a computer device and a computer readable storage medium. The method comprises: when it is detected that elevator door panels (302) are completely closed, removing the door closing torque of an elevator door machine so that the elevator door panels (302) rebound; obtaining the rebound distance and rebound speed of the elevator door panels (302); and according to the bounce distance and/or rebound speed, determining whether a foreign object (404) is clamped between the elevator door panels (302). When the elevator door panels (302) are completely closed, the door closing torque of the elevator door machine is removed so that the elevator door panels (302) rebound, the encoder in the elevator door machine obtains the rebound distance and rebound speed of the elevator door panels (302) during the rebound process, and according to the rebound distance and/or rebound speed of the elevator door panels (302), determines whether a foreign object (404) is clamped between the elevator door panels (302), so as to more accurately detect whether a foreign object (404) is clamped between the elevator door panels (302), so that the elevator will not carry the object (404) during operation, thereby ensuring the safe operation of the elevator.

Description

Method, device and computer equipment for detecting foreign matter caught in elevator door

Technical field

The present invention relates to the technical field of elevators, in particular to a detection method, device, computer equipment and computer-readable storage medium for foreign objects caught in elevator doors.

Background technique

In high-rise buildings, elevators are important equipment for people to pass between different floors in the building. Generally, elevator doors in elevators have object detection functions. Traditional elevator object detection equipment has blind spots and cannot detect smaller objects. When there is a small object between the elevator doors blocking the elevator door, the elevator will judge that the door is closed, and then the elevator can still run normally. However, the objects in the elevator door still exist. During the operation of the elevator, due to the existence of objects in the elevator door, certain safety hazards may be brought.

Therefore, the traditional detection method for foreign objects caught in the elevator door has the problem of inaccurate detection.

Summary of the invention

Based on this, it is necessary to provide a method, device, computer equipment, and computer-readable storage medium for detecting foreign objects in elevator doors in response to the inaccurate technical problem of traditional elevator door object detection methods.

A method for detecting foreign objects caught in elevator doors includes the steps:

When it is detected that the elevator door panel is completely closed, cancel the door closing torque of the elevator door machine to make the elevator door panel rebound;

Obtaining the rebound distance and the rebound speed of the elevator door panel;

According to the rebound distance and/or the rebound speed, it is determined whether the elevator door panel contains foreign objects.

In an embodiment, when it is detected that the elevator door panel is completely closed, before canceling the door closing torque of the elevator door machine so that the elevator door panel rebounds, the method further includes:

Sending a door closing signal to the elevator door machine, so that the elevator door machine controls the elevator door panel to close;

When the loop closing signal of the elevator car door lock is detected, it is determined that the elevator door panel is completely closed.

In an embodiment, the obtaining the rebound distance and the rebound speed of the elevator door panel includes:

When the elevator door panel rebounds and stops, acquiring the first position information of the preset point of the elevator door panel;

Determining the rebound speed of the elevator door panel from the second position to the first position; the second position information is the position information of the preset point when the elevator door panel is fully closed;

According to the first position information and the second position information, the rebound distance of the elevator door panel is obtained.

In one embodiment, the preset point includes:

If the elevator door machine is arranged on the upper part of the elevator, the preset point is arranged on the upper part and/or the middle part of the elevator door panel;

If the elevator door machine is arranged at the bottom of the elevator, the preset point is arranged at the bottom and/or middle of the elevator door panel.

In an embodiment, the determining whether the elevator door panel contains foreign objects according to the rebound distance and/or the rebound speed includes:

If the rebound distance reaches the first threshold, and/or if the rebound speed reaches the second threshold, it is determined that the elevator door panel contains a foreign object.

In one embodiment, it further includes:

If it is determined that the elevator door panel has a foreign object, a stop signal is sent to the elevator main control to stop the elevator.

In an embodiment, after sending a stop signal to the elevator, it further includes at least performing any of the following steps:

If the elevator is on a level floor, send a door opening signal to the elevator door machine to open the elevator door panel;

Sending an alarm signal to the elevator alarm device, so that the elevator alarm device outputs preset alarm information;

Send a warning message to the elevator monitoring center to notify the commissioning personnel of the elevator monitoring center to inspect the elevator door panels.

A detection device for foreign objects caught in elevator doors, including:

The rebound module is used to cancel the door closing torque of the elevator door machine when it is detected that the elevator door panel is completely closed, so that the elevator door panel rebounds;

Obtaining module for obtaining the rebound distance and rebound speed of the elevator door panel;

The judging module is used to determine whether the elevator door panel contains foreign objects according to the rebound distance and/or the rebound speed.

In an embodiment, the device further includes:

The stop module is used to send a stop signal to the elevator to stop the elevator if it is determined that there is a foreign object in the elevator door panel.

A computer device includes a processor and a memory, the memory stores a computer program, and the processor implements the above-mentioned method for detecting foreign objects caught in elevator doors when the processor executes the computer program.

A computer-readable storage medium has a computer program stored thereon, and when the computer program is executed by a processor, the method for detecting foreign objects in elevator doors as described above is realized.

The above-mentioned detection method, device, computer equipment and storage medium for detecting foreign objects in elevator doors can cancel the door closing torque of the elevator door when the elevator door is completely closed, so that the elevator door rebounds, and the encoder in the elevator door is in the rebound process. Obtain the rebound distance and rebound speed of the elevator door panel, and determine whether the elevator door panel contains foreign objects according to the rebound distance and/or rebound speed of the elevator door panel. Compared with the traditional technology, this solution can detect the elevator more accurately. Whether there are foreign objects in the door panels, so that the elevator will not carry foreign objects during operation, ensuring the safe operation of the elevator.

Description of the drawings

FIG. 1 is an application scene diagram of a method for detecting foreign objects caught in an elevator door in an embodiment;

Figure 2 is a schematic structural diagram of the elevator normally closed in the method for detecting foreign objects in the elevator door in an embodiment;

Fig. 3 is a schematic diagram of a structure of a foreign body trapped in an elevator door in an embodiment of the method for detecting foreign matter trapped in an elevator door;

Figure 4 is a schematic flow chart of a method for detecting foreign objects in an elevator door in an embodiment;

5 is a schematic diagram of the structure of the elevator after rebounding in the method for detecting foreign objects in the elevator door in an embodiment;

Fig. 6 is a schematic diagram of a time sequence of an elevator rebound process in a method for detecting foreign objects in an elevator door in an embodiment;

Fig. 7 is a block diagram of a detection device for detecting foreign objects in an elevator door in an embodiment;

Fig. 8 is an internal structure diagram of a computer device in an embodiment.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not used to limit the present invention.

It should be noted that the term "first\second\third" involved in the embodiment of the present invention only distinguishes similar objects, and does not represent a specific order of objects. Understandably, "first\second\third" "Three" can be interchanged in specific order or precedence when permitted. It should be understood that the objects distinguished by "first\second\third" can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

The method for detecting foreign objects in elevator doors provided by the present invention can be applied to the application scenario shown in FIG. 1. FIG. 1 is an application scenario diagram of the method for detecting foreign objects in elevator doors in an embodiment, wherein the elevator 102 passes through the network It communicates with the elevator monitoring center 104 through the network. The elevator 102 can control the elevator door panel to close through the elevator door machine therein.

As shown in Fig. 2, Fig. 2 is a schematic structural diagram of the elevator normally closed in the method for detecting foreign objects in the elevator door in an embodiment. Among them, the elevator door panel 302 can be installed on the four sides of the elevator car to make the elevator in an open or closed state. The elevator door panel 302 can be hung on the guide rail of the elevator and dragged by the elevator door machine to open and close the door. . The guide rail frame can be a member used to support and fix the guide rail, and it can be installed on the hoistway wall or the cross beam. It fixes the spatial position of the guide rail and bears various actions from the guide rail. The elevator door machine may be a device that controls the elevator door panel 302 to open and close the door, and contains an encoder inside.

The elevator 102 can control the elevator door panel 302 to close through the elevator door machine therein, and can also cancel the door closing torque of the elevator door machine after the elevator door panel 302 is closed, so that the elevator door panel 302 rebounds and obtains the rebound after the rebound. The distance and the rebound speed during the rebound process, according to the rebound distance and/or rebound speed, determine whether the elevator door panel 302 contains foreign objects 404. At the same time, it can communicate with the elevator monitoring center 104 through the network to notify the relevant personnel of the elevator Check.

Among them, the elevator 102 can be, but is not limited to, various passenger elevators, freight elevators, hospital elevators, sundries elevators, sightseeing elevators, vehicle elevators, ship elevators, and construction elevators. The elevator monitoring center 104 can be a terminal device, such as a PC. Etc., the elevator monitoring center 104 can also be implemented by an independent server or a server cluster composed of multiple servers.

In one embodiment, a method for detecting foreign objects in elevator doors is provided. Referring to FIG. 4, FIG. 4 is a schematic flow chart of the method for detecting foreign objects in elevator doors in an embodiment. The method is applied to the elevator in FIG. 1 As an example, the method for detecting foreign objects caught in elevator doors may include the following steps:

In step S201, when it is detected that the elevator door panel 302 is completely closed, the door closing torque of the elevator door machine is cancelled, so that the elevator door panel 302 rebounds.

In this embodiment, as shown in FIG. 3, FIG. 3 is a schematic structural diagram of a foreign body trapped in an elevator door in an embodiment of the method for detecting foreign matter trapped in an elevator door. The elevator door machine can control the elevator door panel 302 to close the door by applying a torque in the door closing direction to the elevator door panel 302. There is no limit to the torque of closing the door. The normal door closing situation of the elevator can be as shown in Fig. 2, and the elevator door machine can control the elevator door panel 302 to be completely closed. The elevator uses the car door lock provided therein, and after the car door lock is locked, it can be confirmed that the elevator door panel 302 is completely closed. However, when a foreign object 404 is trapped in the elevator door panel 302, the elevator door panel 302 cannot be completely closed. For example, as shown in Figure 3, when the elevator door machine is installed on the upper part of the elevator, when the elevator door panel 302 is closed with foreign matter 404, the elevator door panel 302 can still be closed, but the lower part of the elevator door panel 302 is still closed. If there is a foreign body 404, the elevator door panel 302 can be in the shape of "A" at this time; when the elevator door machine is installed in the lower part of the elevator, when the elevator door panel 302 is caught with a foreign body 404 during the elevator closing process, the elevator door panel 302 can be in a "V" shape at this time. "Glyph. Since the elevator car door lock installed on the elevator door panel 302 can be closed, the elevator at this time meets the operating conditions. However, if the elevator is operated at this time, it will cause potential safety hazards to the elevator.

The door closing torque of the elevator door machine is cancelled, so that the elevator door panel 302 rebounds. Rebound may be the movement of the elevator door panel 302 in a direction opposite to the door closing direction after losing the door closing torque. When there is no foreign matter 404 between the elevator door panels 302, the elevator door panel 302 can rebound after the door closing torque of the elevator door machine is cancelled. At this time, the rebound distance and/or the rebound speed are small; when the elevator door panels 302 are sandwiched In the case of foreign matter 404, after the door closing torque of the elevator door machine is cancelled, the elevator door panel 302 can also rebound, and the rebound distance and/or rebound speed at this time is relatively large.

Step S202: Obtain the rebound distance and the rebound speed of the elevator door panel 302.

As shown in Fig. 5, Fig. 5 is a schematic diagram of the structure of the elevator after rebound in the method for detecting foreign objects in the elevator door in an embodiment. The elevator door panel 302 generates a rebound distance and a rebound speed when rebounding. The rebound distance may be the distance between the elevator door panel 302 from the position where the elevator door panel 302 is closed to the rest position after the rebound. The rebound speed may be the speed generated during the period of time when the elevator door panel 302 moves to a stationary position after the rebound is completed during the rebound. Among them, the rebound speed may be the highest speed, the average speed, or the instantaneous speed at a certain moment in the rebound process, and the specific method is not limited. The state of the elevator door panel 302 after the rebound is complete can be as shown in Figure 5. Because there is a foreign object 404 between the elevator door panels 302, after the door closing torque is cancelled, the elevator door panel 302 will move in the door opening direction and return to the vertical state, namely Rebound. The elevator door machine can record the above-mentioned rebound distance and rebound speed through an encoder set inside it. Among them, the number and structure of encoders are not limited.

Step S203, according to the rebound distance and/or the rebound speed, it is determined whether the elevator door panel 302 contains a foreign object 404.

As shown in Fig. 5, Fig. 5 shows the state of the elevator door panel 302 after the rebound is completed. Because the elevator door panel 302 is sandwiched with foreign matter 404, the elevator door panel 302 cannot be completely closed. The elevator door machine can use its internal encoder to record the rebound distance and rebound speed of the elevator door panel 302, and because the rebound distance and/or speed of the elevator door panel 302 is small when there is no foreign object 404 clamped, there is The rebound distance and/or rebound speed of the foreign object 404 is relatively large, so it can be determined whether the elevator door panel 302 contains the foreign object 404 according to any one or two of the rebound distance and the rebound speed.

In one embodiment, determining whether the elevator door panel 302 contains foreign objects 404 according to the rebound distance and/or rebound speed, including: if the rebound distance reaches a first threshold, and/or if the rebound speed reaches a second threshold , It is determined whether the elevator door panel 302 contains foreign matter 404.

In this embodiment, the encoder in the elevator door machine can compare the rebound distance with the set first threshold, and compare the rebound speed with the set second threshold. The encoder in the elevator door machine can compare the rebound distance with the set second threshold. Whether the distance is greater than the first threshold, or whether the rebound speed is greater than the second threshold is used to determine whether there is a foreign object 404 between the elevator door panels 302. In addition, the encoder in the elevator door machine can also be combined with the rebound distance and the rebound speed. The corresponding threshold value is compared to determine whether there is a foreign object 404 between the elevator door panels 302, and the rebound distance and the rebound speed are combined to determine whether there is a foreign object 404 between the elevator door panels 302. When the elevator door 302 is normal and there is no foreign matter 404, the rebound distance and speed are small. When the foreign matter 404 is trapped in the lower part of the elevator door 302, the rebound distance and speed are relatively high because of the greater force. Big. If either one of the rebound speed or the rebound distance exceeds the corresponding threshold, it can be determined whether the elevator door panel 302 contains foreign objects 404. Wherein, the first threshold value may be a threshold value of the rebound distance, the second threshold value may be a threshold value of the rebound speed, and the size of the threshold value may be set according to actual conditions. In this embodiment, by setting the corresponding distance threshold and speed threshold, and comparing with the corresponding rebound distance and rebound speed, when one or two of the rebound distance or the rebound speed exceeds the corresponding threshold, it can be changed. It is accurately determined that there is a foreign object 404 between the elevator door panels 302.

In one embodiment, when it is detected that the elevator door panel 302 is completely closed, before canceling the door closing torque of the elevator door machine to make the elevator door panel 302 rebound, the method further includes: sending a door closing signal to the elevator door machine to control the elevator door machine The elevator door panel 302 is closed; when the loop closed signal of the elevator car door lock is detected, it is determined that the elevator door panel 302 is completely closed.

In this embodiment, the door closing signal may be a signal for the elevator door machine to control the elevator door panel 302 to close the door, and the elevator door machine can control the elevator door panel 302 to close after receiving the signal. The elevator car door lock may be a door lock provided on the elevator door panel 302. After the elevator door 302 is closed, the mechanical hook of the door lock is engaged. At this time, the safety circuit of the elevator is closed. When the elevator door 302 is opened, the encoder value can be a set value. When the elevator door 302 is closed, the encoder The value of can be another set value. At this time, the elevator door machine can judge whether the elevator door panel 302 is completely closed through the value of the encoder, and can send the elevator door completely closed signal to the elevator main control when it is judged to be completely closed. When the elevator main control can determine that the elevator door panel 302 is fully closed, it can start operation, which can ensure the safer operation of the elevator.

In this embodiment, it is also possible to perform the step of canceling the door closing torque after confirming that the elevator is in the closed state to check whether the lower part of the elevator door panel 302 contains foreign objects 404 even though the elevator can be closed normally.

In one embodiment, obtaining the rebound distance and rebound speed of the elevator door panel 302 includes: when the elevator door panel 302 rebounds and stops, the first position information of the preset point of the elevator door panel 302; The second position is the rebound speed when the first position is reached; the second position information is the position information of the preset point when the elevator door panel 302 is fully closed; the rebound distance of the elevator door panel 302 is obtained according to the first position information and the second position information.

In this embodiment, as shown in Fig. 6, Fig. 6 is a time sequence diagram of the rebound process of the elevator in the method for detecting foreign objects in the elevator door in an embodiment. The first position P1 information may be the position information of the preset point when the elevator door panel 302 returns to the vertical state during the rebound of the elevator. The second position P2 information may be the position information of the preset point when the elevator door machine makes the elevator door panel 302 completely closed by applying the torque F1.

The rebound speed can be obtained by using the encoder in the elevator door machine to record the speed between the preset point from the second position P2 to the first position P1. The preset point can be set on the elevator door panel 302, and the rebound speed can be the highest speed between the second position P2 and the first position P1, or the average speed between the second position P2 and the first position P1, Or it is the instantaneous speed at a certain moment between the second position P2 and the first position P1, and the specific method can be set according to the actual situation.

The rebound distance can be obtained by using the encoder in the elevator door machine to record the distance between the preset point from the second position P2 to the first position P1. It should be noted that during the rebound process, the elevator door panel 302 may be After reaching the first position P1 due to inertia, the elevator door panel 302 may pass through the first position P1 many times during the rebound process. In this embodiment, the first position P1 may be the first time that the preset point is reached. Position information at the first position P1.

In this embodiment, the elevator closes the elevator door panel 302 under the action of the torque F1. At time t0, it can be determined that the elevator door panel 302 has been closed, and the second position P2 information can be recorded at this time. At time t0, that is, when the elevator door panel 302 is completely closed, the elevator door machine can cancel the torque F1 to make the elevator door panel 302 rebound. At time t1, the elevator door panel 302 rebounds. At this time, the encoder in the elevator door machine can Record the first position P1 information. During the rebound process, the rebound speed recorded by the encoder may be as shown in the line segment 602, which can determine the specific numerical form of the rebound speed in any form in the line segment 602. The rebound distance can be determined according to the distance from the second position P2 to the first position P1 from the preset point recorded by the encoder. Through this embodiment, the aforementioned encoder can determine the specific rebound speed and rebound distance according to the speed change and position change of the preset point during the rebound process, and can obtain the rebound speed and rebound distance more accurately, so that The encoder can more accurately determine whether the elevator door panel 302 contains foreign objects 404.

In one embodiment, the preset points include: if the elevator door machine is set at the upper part of the elevator, the preset point is set at the upper and/or middle part of the elevator door panel 302; if the elevator door machine is set at the bottom of the elevator, the preset point is set at The bottom and/or middle of the elevator door panel 302.

In this embodiment, the preset point may be a point used to record the above-mentioned first position information and second position information, and it may be set on an elevator. Generally, the elevator door machine can be installed on the upper part of the elevator. Therefore, the equipment for detecting the preset point is also installed on the upper part of the elevator along with the elevator door machine. At this time, the equipment can detect the position change of the upper and middle parts of the elevator door panel 302. Therefore, The preset point may be set at the upper part and/or the middle part of the elevator door panel 302. In some embodiments, the elevator door machine can be installed at the bottom of the elevator. At this time, the above-mentioned equipment is also installed at the bottom of the elevator along with the elevator door machine. At this time, the equipment can detect the position change of the bottom and/or middle of the elevator door panel 302. The set point may be set at the bottom and/or middle of the elevator door panel 302. Among them, the number of preset points is not limited.

In an embodiment, it further includes: if it is determined that the elevator door panel 302 contains a foreign object 404, sending a stop signal to the elevator main control to stop the elevator.

In this embodiment, the elevator main control may be a device that controls the operation or stop of the elevator, and the stop signal may be a signal to stop the device. Among them, the location of the elevator main control installation is not limited, and the manner in which it receives the stop signal is also not limited. In this embodiment, when it is determined that there is a foreign object 404 in the elevator door panel 302, a stop signal is sent to the elevator main control, so that the elevator stops the operation of the object, thereby ensuring the safety of the elevator and passengers.

In one embodiment, after sending a stop signal to the elevator, it further includes at least performing any of the following steps: if the elevator is on a leveling floor, sending a door open signal to the elevator door machine to open the elevator door panel 302; sending to the elevator alarm device The alarm signal is used to make the elevator alarm equipment output preset alarm information; the warning information is sent to the elevator monitoring center to notify the commissioning personnel of the elevator monitoring center to inspect the elevator door 302.

In this embodiment, the elevator can perform any one or more of the following steps after receiving the stop operation, and which steps to implement can be set according to actual conditions. E.g:

In some embodiments, if the elevator is on a level floor, a door opening signal is sent to the elevator door machine, so that the elevator door panel 302 is opened. When the elevator is on a leveling floor, the elevator door machine can receive a door opening signal to make the elevator door open, so that passengers in the elevator can check and remove foreign objects 404 caught between the elevator door panels 302, so that the elevator can operate normally and safely. The door opening signal may be a signal that enables the above-mentioned elevator door machine to control the elevator door panel 302 to open the elevator door, and the manner in which the elevator door machine receives the door opening signal is not limited. In this embodiment, after detecting that there is a foreign object 404 between the elevator door panels 302, the elevator door is opened when the elevator is on a leveling floor, and the passengers in the elevator can be reminded to check the foreign objects 404 between the elevator door panels 302 to ensure the safe operation of the elevator. In addition, when the elevator is powered on on a non-leveling floor, it can also detect whether there is a foreign object 404 between the elevator door panels 302. When a foreign object 404 is detected between the elevator door panels 302, the elevator alarm device can transmit alarm information to remind passengers Check the foreign objects 404 between the elevator door panels 302 to ensure the safety of passengers and elevators.

In some embodiments, an alarm signal is sent to the elevator alarm device, so that the elevator alarm device outputs preset alarm information. After the elevator stops running, the elevator alarm device can receive an alarm signal and send an alarm message to the inside of the elevator car, so that the passengers in the elevator know that the operation of the elevator is unsafe. Among them, the form of the alarm information is not limited, for example, it can be sound, light, etc. In this embodiment, when the elevator stops running, the elevator alarm device is used to transmit alarm information, which can promptly remind passengers and related personnel that the elevator is in an abnormal state.

In some embodiments, after the elevator stops running, it can also send a warning signal to the elevator monitoring center to notify the commissioning personnel of the elevator monitoring center to inspect the elevator door panel 302 to ensure that the elevator is in a safe operating state. In some embodiments, the elevator can also detect the closed state of the elevator door panel 302 through the above-mentioned detection method for foreign objects in the elevator door. For example, when the elevator door machine is installed on the upper part of the elevator door panel 302, the above detection method for detecting foreign objects in the elevator door can be used to detect whether the elevator door panel 302 is in the "A" type door when it is closed; when the elevator door machine is installed on the lower part of the elevator door panel 302 At this time, the above detection method for detecting foreign objects in the elevator door can be used to detect whether the elevator door panel 302 is in the "V"-shaped door when it is closed. When it is detected that the elevator door panel 302 is not in the vertically closed state, the above warning signal can be sent to notify the elevator monitoring center to detect the elevator. During the detection, the elevator guide rail or door hanging system can be detected, and the corresponding processing can be performed to ensure that the elevator is in Safe operating state. In this embodiment, by sending alarm information to the elevator monitoring center, the elevator commissioning personnel can be notified in time to detect and repair the elevator in question, which ensures the safe operation of the elevator.

The above detection method for foreign objects in the elevator door is to cancel the door closing torque of the elevator door machine when the elevator door panel 302 is completely closed, so that the elevator door panel 302 rebounds. The elevator door machine can be obtained by changing the position of the preset point during the rebound process. The rebound distance and rebound speed can be determined according to the rebound distance and/or rebound speed at the preset point of the elevator door panel 302 to determine whether the elevator door panel 302 has a foreign object 404. At the same time, the elevator can also make a difference when it is in different situations. Compared with the traditional technology, this solution can more accurately detect whether the elevator door panel 302 contains foreign objects 404, so that the elevator will not carry foreign objects 404 during operation and ensure the safe operation of the elevator.

In one embodiment, a detection device for foreign objects caught in elevator doors is provided. Referring to FIG. 7, FIG. 7 is a structural block diagram of the detection device for foreign objects caught in elevator doors in an embodiment. The detection device for foreign objects caught in elevator doors may include :

The rebound module 702 is used to cancel the door closing torque of the elevator door machine when it is detected that the elevator door panel 302 is completely closed, so that the elevator door panel 302 rebounds;

The obtaining module 704 is used to obtain the rebound distance and the rebound speed of the elevator door panel 302;

The judging module 706 is used to determine whether the elevator door panel 302 contains foreign objects 404 according to the rebound distance and/or the rebound speed.

In one embodiment, the detection device for detecting foreign objects in elevator doors further includes: a stop module for sending a stop signal to the elevator if it is determined that the elevator door panel 302 contains foreign objects 404 to stop the elevator.

In one embodiment, the above detection device for detecting foreign objects in elevator doors further includes: a closing determination module for sending a door closing signal to the elevator door machine so that the elevator door machine controls the elevator door panel 302 to close; when the elevator door panel 302 is detected to close; When the car door lock circuit is closed signal, it is determined that the elevator door panel 302 is completely closed.

In one embodiment, the above-mentioned acquisition module 704 is also used to acquire the first position information of the preset point of the elevator door panel 302 when the elevator door panel 302 rebounds and stop; determine the return of the elevator door panel 302 from the second position to the first position Bouncing speed; the second position information is the position information of the preset point when the elevator door 302 is fully closed; according to the first position information and the second position information, the rebound distance of the elevator door 302 is obtained.

In one embodiment, the above-mentioned judgment module 706 is also used to determine that if the rebound distance reaches the first threshold value, and/or if the rebound speed reaches the second threshold value, determine that the elevator door panel 302 contains a foreign object 404.

In an embodiment, the above detection device for detecting foreign objects in elevator doors further includes at least one of the following modules: a door opening module for sending a door opening signal to the elevator door machine if the elevator is on a level floor, so that the elevator door panel 302 is opened. Alarm module: used to send alarm signals to elevator alarm equipment so that the elevator alarm equipment outputs preset alarm information. Notification module: used to send warning information to the elevator monitoring center to notify the commissioning personnel of the elevator monitoring center to inspect the elevator door 302.

The detection device for foreign objects in the elevator door of the present invention corresponds to the detection method of foreign objects in the elevator door of the present invention. For the specific limitation of the detection device for foreign objects in the elevator door, please refer to the above definition of the detection method for foreign objects in the elevator door. The technical features and beneficial effects described in the above embodiments of the detection method for foreign objects in elevator doors are all applicable to the embodiments of the detection device for foreign objects in elevator doors, and will not be repeated here. Each module in the above-mentioned detection device for detecting foreign objects in elevator doors can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules may be embedded in the form of hardware or independent of the processor in the computer equipment, or may be stored in the memory of the computer equipment in the form of software, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

In one embodiment, a computer device is provided. The computer device may be an elevator door machine device, and its internal structure diagram may be as shown in FIG. 8. The computer equipment includes a processor, a memory, a network interface, and a database connected through a system bus. Among them, the processor of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database of the computer equipment can be used to store data such as elevator rebound speed and rebound distance. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for detecting foreign objects caught in elevator doors is realized.

Those skilled in the art can understand that the structure shown in FIG. 8 is only a block diagram of part of the structure related to the solution of the present invention, and does not constitute a limitation on the computer equipment to which the solution of the present invention is applied. The specific computer equipment may Including more or fewer parts than shown in the figure, or combining some parts, or having a different arrangement of parts.

In one embodiment, a computer device is provided, including a processor and a memory, the memory stores a computer program, and when the processor executes the computer program, the elevator door clamp as described in any of the above embodiments is implemented. Foreign body detection method.

A person of ordinary skill in the art can understand that all or part of the process in the method for detecting foreign objects in the elevator door as described in any of the above embodiments can be completed by instructing relevant hardware by a computer program. The computer program can be Stored in a non-volatile computer readable storage medium, when the computer program is executed, it may include the processes of the above-mentioned method embodiments. Wherein, any reference to memory, storage, database or other media used in the various embodiments provided by the present invention may include non-volatile and/or volatile memory. Non-volatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not a limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Channel (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

Accordingly, in one embodiment, there is also provided a computer-readable storage medium on which a computer program is stored, wherein the program is executed by the processor to realize the detection of foreign objects in the elevator door as described in any of the above embodiments. method.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered as the range described in this specification.

The above-mentioned embodiments only express several embodiments of the present invention, and the descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A method for detecting foreign objects caught in elevator doors is characterized in that it comprises the following steps:

When it is detected that the elevator door panel is completely closed, cancel the door closing torque of the elevator door machine to make the elevator door panel rebound;

Obtaining the rebound distance and the rebound speed of the elevator door panel;

According to the rebound distance and/or the rebound speed, it is determined whether the elevator door panel contains foreign objects.
The method according to claim 1, wherein when it is detected that the elevator door panel is completely closed, canceling the door closing torque of the elevator door machine to make the elevator door panel rebound, before the step further comprises:

Sending a door closing signal to the elevator door machine, so that the elevator door machine controls the elevator door panel to close;

When the loop closing signal of the elevator car door lock is detected, it is determined that the elevator door panel is completely closed.
The method according to claim 1, wherein said obtaining the rebound distance and the rebound speed of the elevator door panel comprises:

When the elevator door panel rebounds and stops, acquiring the first position information of the preset point of the elevator door panel;

Determining the rebound speed of the elevator door panel from the second position to the first position; the second position information is the position information of the preset point when the elevator door panel is fully closed;

According to the first position information and the second position information, the rebound distance of the elevator door panel is obtained.
The method according to claim 3, wherein the preset point comprises:

If the elevator door machine is arranged on the upper part of the elevator, the preset point is arranged on the upper part and/or the middle part of the elevator door panel;

If the elevator door machine is arranged at the bottom of the elevator, the preset point is arranged at the bottom and/or middle of the elevator door panel.
The method according to claim 1, wherein the determining whether the elevator door panel contains foreign objects according to the rebound distance and/or the rebound speed comprises:

If the rebound distance reaches the first threshold, and/or if the rebound speed reaches the second threshold, it is determined that the elevator door panel contains a foreign object.
The method according to claim 1, further comprising:

If it is determined that the elevator door panel has a foreign object, a stop signal is sent to the elevator main control to stop the elevator.
The method according to claim 6, characterized in that, after sending a stop signal to the elevator, it further comprises at least performing any of the following steps:

If the elevator is on a level floor, send a door opening signal to the elevator door machine to open the elevator door panel;

Sending an alarm signal to the elevator alarm device, so that the elevator alarm device outputs preset alarm information;

Send a warning message to the elevator monitoring center to notify the commissioning personnel of the elevator monitoring center to inspect the elevator door panels.
A detection device for foreign objects caught in elevator doors, which is characterized in that it comprises:

The rebound module is used to cancel the door closing torque of the elevator door machine when it is detected that the elevator door panel is completely closed, so that the elevator door panel rebounds;

Obtaining module for obtaining the rebound distance and rebound speed of the elevator door panel;

The judging module is used to determine whether the elevator door panel contains foreign objects according to the rebound distance and/or the rebound speed.
The device according to claim 8, wherein the device further comprises:

The stop module is used to send a stop signal to the elevator to stop the elevator if it is determined that there is a foreign object in the elevator door panel.
A computer device, comprising a processor and a memory, the memory storing a computer program, wherein the processor executes the computer program to achieve the elevator door trapping of foreign objects according to any one of claims 1 to 7 Steps of the detection method.
A computer-readable storage medium with a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method for detecting foreign objects in an elevator door according to any one of claims 1 to 7.