CN115724325A

CN115724325A - Light curtain false touch detection method and device, electronic equipment and storage medium

Info

Publication number: CN115724325A
Application number: CN202211637815.1A
Authority: CN
Inventors: 杜卉然; 唐其伟; 陈涛
Original assignee: Hitachi Building Technology Guangzhou Co Ltd
Current assignee: Hitachi Building Technology Guangzhou Co Ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-03-03

Abstract

The invention discloses a method and a device for detecting light curtain false touch, electronic equipment and a storage medium, wherein the method comprises the following steps: in the closing process of the ladder door, when at least one blocking light curtain of a passenger is detected, counting the blocking duration and acquiring an image collected by an image sensor; identifying whether the movement trend of the passenger is moving towards the door according to the image; if not, acquiring the position of an intrusion part of the passenger in the light curtain; acquiring motion data of the door, and calculating the collision duration of the door and the intrusion part according to the motion data and the position of the intrusion part; and when the collision time length is greater than the safety time length threshold value and the blocking time length is less than the blocking time length threshold value, determining that the passenger mistakenly touches the light curtain. Whether the passenger mistakenly touches the light curtain or not is determined according to the blocking duration of the passenger motion trend, the elevator door motion data and the light curtain blocked, when the passenger mistakenly touches the light curtain, a reverse door opening signal is not output, the situation that the elevator door is repeatedly opened and closed due to the fact that the passenger mistakenly touches the light curtain is avoided, and the operation efficiency of the elevator and the passenger experience of taking the elevator are improved.

Description

Light curtain false touch detection method and device, electronic equipment and storage medium

Technical Field

The invention relates to the technical field of elevator control, in particular to a light curtain false touch detection method and device, electronic equipment and a storage medium.

Background

In order to prevent passengers from colliding with the elevator doors when the elevator doors are closed because the passengers are located in the door compartment area of the elevator doors, a light curtain is generally arranged on the elevator doors, and whether the passengers are located in the door compartment area is detected through the light curtain.

The light curtain outputs a corresponding signal when blocked by an object in the interdoor region, and will be reversed if the door is closing. However, in the process of closing the elevator door, the behavior of blocking the light curtain may be an instant and unintentional behavior, and the light curtain caused by the passengers getting in and out of the elevator door is not blocked, so that the passengers do not collide with the elevator door.

Disclosure of Invention

The invention provides a light curtain false touch detection method and device, electronic equipment and a storage medium, and aims to solve the problem that in the prior art, a light curtain outputs a reverse opening door signal when a passenger blocks the light curtain instantaneously and unconsciously.

In a first aspect, the present invention provides a light curtain false touch detection method, including:

when at least one blocking light curtain of a passenger is detected in the closing process of the ladder door, counting blocking duration and acquiring an image acquired by an image sensor;

identifying whether the movement trend of the passenger is moving towards a door according to the image;

if not, acquiring the position of the intrusion part of the passenger in the light curtain;

acquiring motion data of the door, and calculating the collision time length of the door and the intrusion part according to the motion data and the position of the intrusion part;

and when the collision time length is greater than a preset safety time length threshold value and the blocking time length is less than a blocking time length threshold value, determining that the passenger mistakenly touches the light curtain.

In a second aspect, the present invention provides a light curtain false touch detection device, including:

the blocking duration and image acquisition module is used for counting the blocking duration and acquiring an image acquired by the image sensor when at least one blocking light curtain of a passenger is detected in the closing process of the ladder door;

the movement trend judging module is used for identifying whether the movement trend of the passenger moves towards the elevator door or not according to the image;

the intrusion part position acquisition module is used for acquiring the position of the intrusion part of the passenger in the light curtain;

the collision duration calculation module is used for acquiring the motion data of the ladder door and calculating the collision duration of the ladder door and the intrusion part according to the motion data and the position of the intrusion part;

and the light curtain mistaken touch determining module is used for determining that the passenger mistakenly touches the light curtain when the collision time length is greater than a preset safety time length threshold value and the blocking time length is less than a blocking time length threshold value.

In a third aspect, the present invention provides an electronic device, comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,

the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the light curtain false touch detection method according to the first aspect of the present invention.

In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions for implementing the light curtain false touch detection method according to the first aspect of the present invention when executed by a processor.

According to the embodiment of the invention, in the process of closing the elevator door, when at least one blocking light curtain of a passenger is detected, the blocking time duration is counted and the image acquired by the image sensor is acquired, when the movement trend of the passenger is identified not to move towards the elevator door according to the image, the position of the invasion part of the passenger in the light curtain is acquired, the collision time duration of the elevator door and the invasion part is calculated according to the movement data and the position of the invasion part after the movement data of the elevator door is acquired, when the collision time duration is greater than the preset safety time duration threshold and the blocking time duration is less than the blocking time duration threshold, the passenger is determined to touch the light curtain by mistake, whether the passenger touches the light curtain by mistake or not is determined according to the movement trend of the passenger, the movement data of the elevator door and the blocking time duration of the light curtain, when the passenger is determined to touch the light curtain by mistake, a reverse door opening signal is not output, the situation that the elevator door is opened and closed repeatedly due to touching the light curtain by mistake is avoided, and the operation efficiency of the elevator and the experience of the passenger on taking the elevator are improved.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1A is a flowchart of a light curtain false touch detection method according to an embodiment of the present invention;

FIG. 1B is a schematic view of a light curtain being blocked in an embodiment of the present invention;

FIG. 1C is a schematic illustration of the installation of a sensor in an embodiment of the invention;

fig. 2 is a flowchart of a light curtain false touch detection method according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a light curtain false touch detection device according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Fig. 1A is a flowchart of a light curtain false touch detection method according to an embodiment of the present invention, which is applicable to detecting a situation where a light curtain is blocked by an unintentional behavior of a passenger and a false trigger occurs, where the method may be executed by a light curtain false touch detection device, the light curtain false touch detection device may be implemented in a form of hardware and/or software, and the light curtain false touch detection device may be configured in an electronic device, such as a controller of an elevator. As shown in fig. 1A, the light curtain false touch detection method includes:

s101, in the process of closing the ladder door, when at least one blocking light curtain of a passenger is detected, counting blocking duration, and acquiring an image acquired by an image sensor.

As shown in fig. 1B, the light curtain is installed between the left and right doors, which may be a non-visible light curtain, and when an object enters between the two doors, the light curtain is blocked, in fig. 1B, the passenger's limb enters the light curtain as the intrusion portion B, and the light curtain is blocked, and the timer may be started to time the blocked duration of the light curtain, so as to obtain the blocked duration, and obtain the image collected by the image sensor.

As shown in fig. 1C, in this embodiment, a sensor 3 is installed on the car of the elevator, and the sensor may be a general camera, such as a black and white camera, an RGB camera, or an active light sensor, such as a TOF (time of flight) depth sensor, a structured light sensor, or the like, that is, a sensor that senses by emitting light and receiving light to obtain a depth image, of course, the sensor may also be a radar, and the present embodiment does not limit the type of the sensor.

In one example, the sensor of the present embodiment may be an active optical sensor, the sensor 3 may be mounted on the car 1 such that the detection area of the sensor 3 covers the area inside the car 1 and the area of the waiting hall 2, and optionally, the sensor 3 may be mounted on a lintel of a car door of the car 1, for example, at a middle position of the lintel of the car door, such that the detection area of the sensor 3 covers the area inside the car 1 and the area of the waiting hall 2.

In one example, the number of the sensors 3 may be one, that is, the sensors 3 may be active optical sensors having a large field angle, and further, when the number of the sensors 3 is one, the angle of the sensors 3 may be adjusted, that is, the angle of the light emitting axis of the sensors 3 with the vertical direction is variable, that is, the sensors 3 may be adjusted in angle, so that the detection area 5 of the sensors 3 in the lobby 2 may be enlarged or reduced.

As shown in fig. 1B, in another example, the number of the sensors 3 may be two, among the two sensors 3, the light emitting axis of one sensor 3 faces the car 1 to collect images of the area in the car 1, and the light emitting axis of the other sensor 3 faces the elevator waiting hall 2 to collect images of the area in the elevator waiting hall 2, optionally, the detection ranges of the two sensors 3 have an overlapping area to ensure that the images of all the areas from the car 1 to the elevator waiting hall 2 can be collected, and at the same time, when the sensors are 1 active light sensors in the vertical direction of the light emitting axis, the overexposure problem generated after the elevator is closed when the images of all the areas from the car 1 to the elevator waiting hall 2 are collected at the same time is avoided. For example, the angles of the light emission axes of the two sensors 3 with the vertical direction may be adjusted to adjust the detection areas of the two sensors 3. Of course, the angle of the light emission axis of the two sensors 3 to the vertical direction may also be fixed.

In this embodiment, the sensor 3 may be controlled to acquire images of areas near the doors in the car 1 and the hall 2 according to a preset frame rate, where the images may be depth images, black-and-white images, color images, and the like, and the frame rate at which the sensor 3 acquires the images may be a fixed frame rate or a dynamically adjustable frame rate.

And S102, identifying whether the movement trend of the passenger moves towards the door according to the image.

In one embodiment, the image may be subjected to object detection tracking, a moving speed and a moving direction of a passenger body are obtained, when the moving speed is less than a preset speed threshold and the moving direction is less than a preset direction threshold, it is determined that the passenger does not move towards the landing door, when the moving speed is greater than the preset speed threshold and the moving direction is greater than the preset direction threshold, it is determined that the passenger moves towards the landing door, specifically, an object detection model may be trained in advance, the image is input into the object detection model, and each passenger is identified, and a passenger sequence is established, the passenger sequence includes a passenger ID, a position of a trunk a of the passenger, a moving speed, a moving direction and the like, wherein the position of the passenger may be a position of the passenger in a car or a landing hall, the moving speed may be a speed at which the passenger moves towards the landing door, the moving direction may be a face direction of the passenger, when the face of the passenger faces towards the landing door, the moving direction is the largest, when the face of the passenger is parallel to the landing door, the moving direction is the smallest, if the moving speed of the passenger is greater than the speed threshold and the moving direction is the direction of the landing door, and vice versa, the passenger faces towards the landing door, the elevator door, the passenger is the trend or the trend is the trend.

In another embodiment, a passenger motion trend prediction model can be trained, the collected image sequence is input into the passenger motion trend prediction model to obtain the elevator taking or exiting probability of each passenger, and when the probability is greater than a preset threshold value, it is determined that the passenger has the elevator taking or exiting trend.

Of course, those skilled in the art may also determine whether the passenger has a tendency to take the elevator or get out of the elevator in other ways, if so, it indicates that the passenger blocks the light curtain and intends to take the elevator or get out of the elevator, the elevator door is controlled to be opened reversely, and if not, S103 is executed.

S103, acquiring the position of the intrusion part of the passenger in the light curtain.

As shown in fig. 1B, the intruding part B may be a limb of the passenger, such as a hand or a foot of the passenger, and the trunk a and the limb of the passenger may be identified from the image by using an image identification technology, and the limb intruding into the light curtain may be determined as the intruding part B, and the position of the intruding part may be determined by combining the installation position of the sensor and the imaging principle, and may be a coordinate of the intruding part when the position of the sensor is set as the origin of coordinates.

S104, acquiring motion data of the door, and calculating the collision time of the door and the intrusion part according to the motion data and the position of the intrusion part.

In one example, the movement data of the door may be the door opening width, the door closing speed, the door movement direction, and the like of the door, where the door opening width may be a distance calculated according to the door edge positions of the two doors after the door edge position is detected, the door edge position may be a coordinate of the door edge when the position of the sensor is set as a coordinate origin, a distance d from the intrusion part B to the door edge may be calculated according to the door edge coordinate and the coordinate of the intrusion part, and a ratio of the distance d to the door closing speed is calculated to obtain a time length required for the door to collide with the intrusion part B when the door is closed, that is, a collision time length.

S105, when the collision time length is larger than the preset safety time length threshold value and the blocking time length is smaller than the blocking time length threshold value, determining that the passenger mistakenly touches the light curtain.

If the collision duration is greater than the safety duration threshold, it is indicated that the passenger closes the blocking door when the door opening width is large, the blocking duration is less than the blocking duration threshold, it is indicated that the duration of the intrusion part B entering the light curtain is short, and the passenger who needs to take the elevator or go out of the elevator has a need, the behavior of closing the blocking door is generally that the door opening distance is small, or the distance between the hand and the elevator door is small, so that the collision duration is short, and the blocking duration is generally too large due to the fact that the hand intrudes into the light curtain for a long time, therefore, when the collision duration is greater than the preset safety duration threshold and the blocking duration is less than the blocking duration threshold, it is determined that the blocking behavior of the passenger is unconscious, the passenger does not have the intention of taking the elevator or going out of the elevator, it can be determined that the passenger mistakenly touches the light curtain, and the elevator door can be controlled to continue to be closed.

According to the embodiment of the invention, in the process of closing the elevator door, when at least one blocking light curtain of a passenger is detected, the blocking time duration is counted and the image acquired by the image sensor is acquired, when the movement trend of the passenger is identified not to move towards the elevator door according to the image, the position of the invasion part of the passenger in the light curtain is acquired, the collision time duration of the elevator door and the invasion part is calculated according to the movement data and the position of the invasion part after the movement data of the elevator door is acquired, when the collision time duration is greater than a preset safety time duration threshold and the blocking time duration is less than a blocking time duration threshold, the passenger is determined to touch the light curtain by mistake, whether the passenger touches the light curtain by mistake is determined according to the movement trend of the passenger, the movement data of the elevator door and the blocking time duration of the light curtain, when the passenger is determined to touch the light curtain by mistake, a reverse door opening signal is not output, the repeated door opening and door closing caused by the mistaken touch of the light curtain is avoided, and the operation efficiency of the elevator and the elevator riding experience of the passenger are improved.

Example two

Fig. 2 is a flowchart of a light curtain false touch detection method according to a second embodiment of the present invention, which is optimized based on the first embodiment of the present invention, and as shown in fig. 2, the light curtain false touch detection method includes:

s201, in the process of closing the ladder door, when at least one blocking light curtain of a passenger is detected, counting blocking duration, and acquiring an image acquired by an image sensor.

S202, whether the movement trend of the passenger moves towards the door is identified according to the image.

When detecting that the passenger does not move towards the door, S203 is executed, and when detecting that the passenger moves towards the door and has the tendency of taking the elevator or going out of the elevator, the door is controlled to be opened reversely.

S203, recognizing an intrusion part of the passenger into the light curtain from the image, and determining the position of the intrusion part in the door area.

And S204, acquiring the door opening width and the door closing speed of the ladder door.

In one example, the motion data of the door may be the door opening width and the door closing speed of the door, in one embodiment, the door opening distance and the door closing speed of the door may be obtained from the door controller, in another embodiment, the door opening width and the door closing speed of the door may be obtained by performing detection and tracking on the door, and this embodiment does not limit the time of obtaining the door opening width and the door closing speed.

And S205, judging whether the door opening width is larger than a preset width threshold value.

In one example, the width threshold may be 200mm, which may be determined according to the size of the door and the door closing speed, and if the door opening width is greater than the preset width threshold, which indicates that the door opening width is still greater, there is enough time to determine whether the light curtain is touched by the passenger by mistake, S206 may be performed.

When the width of opening a door is less than or equal to the width threshold value, the ladder door has closed to a certain extent, and the crack between two ladder doors has been less, and in order to guarantee safety, if it is blocked to detect the light curtain, do not have enough time to judge whether the light curtain is that the passenger touched by mistake, then control ladder door and open the door in reverse to whether the passenger triggered the in-process of light curtain by mistake in the time determination that needs, the ladder door has closed and collides with the passenger.

And S206, calculating the closest distance from the intrusion part to the door according to the door opening width and the position of the intrusion part in the door area.

Specifically, the door opening width may be a distance calculated according to the door edge positions of the two doors after the door edge positions are detected, and the door edge positions may be coordinates of the door edge when the position of the sensor is set as the origin of coordinates, and then a difference between the coordinates of the intrusion portion and the coordinates of the two door edge positions may be calculated, respectively, to obtain distances from the intrusion portion to the two doors, and determine the minimum distance as a closest distance from the intrusion portion to the doors.

As shown in fig. 1B, the distance from the intrusion part B to the left landing door is the smallest, and the distance d is the closest distance from the intrusion part B to the landing door.

And S207, calculating the ratio of the closest distance to the door closing speed to obtain the collision duration of the ladder door and the intrusion part.

Specifically, the door closing speed is the speed of the ladder door moving to the intrusion part, and the ratio of the closest distance d to the door closing speed is calculated, that is, the time length required by the ladder door moving to the intrusion part B and colliding with the intrusion part B is obtained as the collision time length.

And S208, when the collision time length is greater than the preset safety time length threshold value and the blocking time length is less than the blocking time length threshold value, determining that the passenger mistakenly touches the light curtain.

If the collision duration is greater than the safety duration threshold, the passenger is indicated to be closed by the blocking door when the door opening width is large, the blocking duration is less than the blocking duration threshold, the duration of the intrusion part B entering the light curtain is short, and the passenger who needs to take or get out of the elevator generally has a small door opening distance or a short collision duration due to a small distance between a hand and the elevator door, and generally invades the hand into the light curtain for a long time to cause an overlarge blocking duration.

And S209, controlling the ladder door to be continuously closed.

When the passenger is determined to touch the light curtain by mistake, the ladder door can be controlled to be continuously closed.

In another embodiment, if the blocking time length is greater than or equal to the preset blocking time length threshold value, it indicates that the hands or feet of the passenger invade the light curtain for a long time to block the closing of the ladder door, and the passenger thinks that the passenger intends to block the closing of the ladder door, the door can be controlled to open reversely, so as to avoid the accident caused by the collision between the ladder door and the passenger.

In another embodiment, if the collision duration is less than or equal to the preset safety duration threshold, it indicates that the door closing speed is too fast, or the position where the passenger's hand or corner intrudes into the light curtain is close to the door, there is not enough time to determine whether the passenger mistakenly triggers the light curtain, and in order to avoid the collision between the door and the passenger, the door is controlled to be reversely opened to ensure the safety of the passenger.

In the embodiment, in the process of closing the elevator door, when at least one blocking light curtain of a passenger is detected, the blocking time duration is counted and an image collected by an image sensor is obtained, when the movement trend of the passenger is not to move towards the elevator door according to the image, the intrusion part is identified from the image and the position of the intrusion part is determined, after the door opening width and the door closing speed of the elevator door are obtained, when the door opening width is greater than a width threshold value, the closest distance from the intrusion part to the elevator door is determined according to the position of the intrusion part and the door opening width of the elevator door, the ratio of the closest distance to the door closing speed is calculated to obtain the collision time duration, when the collision time duration is greater than a preset safety time duration threshold value and the blocking time duration is less than a blocking time duration threshold value, the passenger is determined to mistakenly touch the light curtain, whether the passenger mistakenly touches the light curtain is mistakenly touched by the passenger is determined according to the movement trend of the elevator door, when the passenger mistakenly touches the light curtain, a reverse door opening signal is not output, the situation that the elevator door is repeatedly opened and the elevator operation efficiency and the experience of the passenger are improved.

Further, when the collision time is less than or equal to the safety time threshold value, or the blocking time of the light curtain is greater than or equal to the blocking time threshold value, the door of the control ladder is opened reversely, the collision between the door and passengers is avoided, and the safety of passengers taking the ladder is ensured.

EXAMPLE III

Fig. 3 is a schematic structural diagram of a light curtain false touch detection device according to a third embodiment of the present invention. As shown in fig. 3, the light curtain false touch detection device includes:

a blocking duration and image obtaining module 301, configured to count blocking durations and obtain an image acquired by an image sensor when at least one blocking light curtain of a passenger is detected in a process of closing a door of the elevator;

a motion trend judging module 302, configured to identify whether the motion trend of the passenger is moving towards a door according to the image;

an intrusion position acquisition module 303, configured to acquire a position of an intrusion portion of the passenger in the light curtain;

a collision duration calculation module 304, configured to obtain motion data of the door, and calculate a collision duration between the door and the intrusion portion according to the motion data and the position of the intrusion portion;

the light curtain mis-touch determination module 305 is configured to determine that the passenger mis-touches the light curtain when the collision duration is greater than a preset safety duration threshold and the blocking duration is less than a blocking duration threshold.

Optionally, the motion trend determining module 302 includes:

the target tracking unit is used for carrying out target detection tracking on the image to obtain the moving speed and the moving direction of the passenger body;

a first movement tendency determination unit for determining that the passenger does not move toward the door when the moving speed is less than a preset speed threshold and the moving direction is less than a preset direction threshold;

and the second movement trend determining unit is used for determining that the passenger moves towards the ladder door when the moving speed is greater than a preset speed threshold value and the moving direction is greater than a preset direction threshold value.

Optionally, the intrusion part position acquiring module 303 includes:

and the intrusion part detection unit is used for identifying the intrusion part of the passenger in the light curtain from the image and determining the position of the intrusion part in the door area.

Optionally, the collision duration calculation module 304 includes:

and the door motion data acquisition unit is used for acquiring the door opening width and the door closing speed of the ladder door.

Optionally, the movement data of the door includes a door opening width and a door closing speed of the door, the position of the intrusion portion includes a position of the intrusion portion in a door region, and the collision duration calculation module 304 includes:

the door opening width judging unit is used for judging whether the door opening width is larger than a preset width threshold value or not;

the closest distance calculation unit is used for calculating the closest distance from the invasion part to the door according to the door opening width and the position of the invasion part in the door area;

and the collision duration calculation unit is used for calculating the ratio of the closest distance to the door closing speed to obtain the collision duration of the ladder door and the intrusion part.

Optionally, the collision duration calculating module 304 further includes:

and the anti-opening door control unit is used for controlling the ladder door to open in an anti-opening mode when the door opening width is smaller than or equal to a preset width threshold value.

Optionally, the method further comprises:

and the ladder door closing control module is used for controlling the ladder door to be continuously closed.

Optionally, the method further comprises:

and the back-opening door control module is used for controlling the ladder door to open back when the blocking time length is greater than or equal to a preset blocking time length threshold value or the collision time length is less than or equal to a preset safety time length threshold value.

The light curtain false touch detection device provided by the embodiment of the invention can execute the light curtain false touch detection method provided by the first embodiment and the second embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

Example four

FIG. 4 shows a schematic block diagram of an electronic device 40 that may be used to implement an embodiment of the invention. The electronic device 40 is intended to represent various forms of digital computers, such as desktops, workstations, servers, blade servers, mainframes, and the like. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 4, the electronic device 40 includes at least one processor 41, and a memory communicatively connected to the at least one processor 41, such as a Read Only Memory (ROM) 42, a Random Access Memory (RAM) 43, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 41 may perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 42 or the computer program loaded from a storage unit 48 into the Random Access Memory (RAM) 43. In the RAM43, various programs and data necessary for the operation of the electronic apparatus 40 can also be stored. The processor 41, the ROM42, and the RAM43 are connected to each other via a bus 44. An input/output (I/O) interface 45 is also connected to bus 44.

A number of components in the electronic device 40 are connected to the I/O interface 45, including: an input unit 46 such as a keyboard, a mouse, a sensor, etc.; an output unit 47 such as various types of displays, speakers, and the like; a storage unit 48 such as a magnetic disk, optical disk, or the like; and a communication unit 49 such as a network card, modem, wireless communication transceiver, etc. The communication unit 49 allows the electronic device 40 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.

Processor 41 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 41 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various dedicated Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, and so forth. The processor 41 performs the various methods and processes described above, such as the light curtain false touch detection method.

In some embodiments, the light curtain false touch detection method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 48. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 40 via the ROM42 and/or the communication unit 49. When the computer program is loaded into the RAM43 and executed by the processor 41, one or more steps of the light curtain false touch detection method described above may be performed. Alternatively, in other embodiments, the processor 41 may be configured to perform the light curtain false touch detection method by any other suitable means (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A light curtain false touch detection method is characterized by comprising the following steps:

in the closing process of the ladder door, when at least one blocking light curtain of a passenger is detected, counting the blocking duration, and acquiring an image acquired by an image sensor;

identifying whether the movement trend of the passenger moves towards a door according to the image;

acquiring motion data of the ladder door, and calculating the collision duration of the ladder door and the intrusion part according to the motion data and the position of the intrusion part;

2. The method of claim 1, wherein said identifying from said image whether said passenger's movement trend is toward a door comprises:

carrying out target detection and tracking on the image to obtain the moving speed and the moving direction of the passenger body;

determining that the passenger does not move toward the landing door when the moving speed is less than a preset speed threshold and the moving direction is less than a preset direction threshold;

and when the moving speed is greater than a preset speed threshold value and the moving direction is greater than a preset direction threshold value, determining that the passenger moves towards the ladder door.

3. The method of claim 1, wherein said obtaining a location of an intrusion of the passenger in the light curtain comprises:

and identifying an intrusion part of the passenger into the light curtain from the image, and determining the position of the intrusion part in the door area.

4. The method of claim 1, wherein the acquiring motion data for the door comprises:

and acquiring the door opening width and the door closing speed of the ladder door.

5. The method of claim 1, wherein the movement data of the door comprises a door opening width and a door closing speed of the door, the position of the intrusion portion comprises a position of the intrusion portion in a door zone, and the calculating of the collision time period of the door with the intrusion portion based on the movement data and the position of the intrusion portion comprises:

judging whether the door opening width is larger than a preset width threshold value or not;

if so, calculating the closest distance from the invasion part to the door according to the door opening width and the position of the invasion part in the door area;

and calculating the ratio of the closest distance to the door closing speed to obtain the collision duration of the ladder door and the intrusion part.

6. The method of claim 5, wherein calculating a length of time a door collision with the intruding portion based on the motion data and the location of the intruding portion further comprises:

and when the door opening width is smaller than or equal to a preset width threshold value, controlling the ladder door to open reversely.

7. The method of any of claims 1-6, further comprising, after determining that the passenger mistouched the light curtain:

and controlling the ladder door to continuously close.

8. The method of any one of claims 1-6, further comprising:

and when the blocking time length is greater than or equal to a preset blocking time length threshold value, or the collision time length is less than or equal to a preset safety time length threshold value, controlling the door to open reversely.

9. The utility model provides a light curtain mistake touches detection device which characterized in that includes:

the intrusion part position acquisition module is used for acquiring the position of an intrusion part of the passenger in the light curtain;

10. An electronic device, characterized in that the electronic device comprises:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the light curtain false touch detection method of any one of claims 1-8.

11. A computer-readable storage medium storing computer instructions for causing a processor to implement the light curtain false touch detection method according to any one of claims 1-8 when executed.