CN202429845U - Clamping and contacting prevention video light curtain system for elevator - Google Patents

Abstract

The utility model discloses a clamping and contacting prevention video light curtain system for an elevator. The system comprises a camera which is connected with a video light curtain unit which can perform clamping and contacting prevention control according to the image information acquired by the camera; the camera is positioned in a cage of the elevator and near the top of the side of a cage door and is used for detecting images between the cage door of the elevator and a hoistway door; and the video light curtain unit is arranged on the cage, and is connected with a control unit positioned on the side of a control cabinet of the elevator in a wired or wireless communication mode. The area between the hoistway door and the cage door is detected in a distinguished way according to the images acquired by the camera, so that the condition that people who take the elevator are clamped to be hurt when the door of the elevator is closed can be effectively avoided. Furthermore, surface detection is converted into line detection by a detection algorithm, and while sensitivity is guaranteed, the calculated amount is greatly reduced, and economy is improved.

Description

An elevator anti-pinch video light curtain system

technical field

The utility model relates to the technical field of elevator control, in particular to an elevator anti-pinch touch video light curtain system.

Background technique

With the rapid development of modern urban construction and the improvement of people's living standards, the demand for elevators is also increasing day by day, and residents' awareness of elevator safety is becoming clearer and clearer. As the only access control for passengers to enter and exit the elevator car, the safety of elevator doors is increasing. Attracting the attention of users, the elevator door protection device has become one of the elevator safety products that users are most concerned about, and it is also an important indicator to measure the quality of elevators.

At present, the elevator door protection device generally adopts the combination of infrared light curtain and safety touch panel, that is, two vertical light curtain panels are installed in parallel on both sides of the elevator car door, and one of the panels is evenly installed with The infrared emitting device is used to emit infrared rays, and its resolution basically reaches 20~40mm, and an infrared receiving device is installed on the other board to receive the infrared rays emitted by the infrared emitting device. When there is no person or object between the two light curtains, the infrared rays will not be blocked, and the receiving device can receive the infrared rays smoothly, and the door operator will be closed at this time; otherwise, the receiving device cannot receive the infrared rays, and the door operator will be opened. The resolution of the above-mentioned infrared light curtain is generally 20~40mm. If a relatively small object such as a human finger is in the middle of the elevator door, the infrared light curtain may not be able to detect it. The safety touch panel is designed to make up for this deficiency. When the door operator is closed, if the safety touch panel touches a person's finger, the door operator will be forced to open, thereby avoiding the occurrence of a pinch event.

Since the effective detection range of the traditional infrared light curtain is a plurality of spaced straight lines on the plane, the measurement range is limited; and it must be used in combination with the safety touch panel, forcing people to upgrade and improve the elevator infrared light curtain. The elevator video light curtain system solves the problems of detection blind spots and insufficient reliability of the traditional elevator infrared light curtain. It is a video monitoring device for re-opening doors of elevators that cause passengers or belongings to be caught due to accidental closing. This device solves the problem of insufficient reliability of the infrared light curtain without changing the structure of the original elevator car door. However, the camera of the elevator video light curtain is installed in the middle between the car door and the hall door of the elevator. The detection range and light intensity will be affected during the closing process of the hall door and car door, and the received video image signal is not easy. deal with.

Utility model content

The technical problem to be solved by the utility model is to provide an elevator anti-pinch video light curtain system with low cost and high safety and reliability, which can effectively prevent passengers from being pinched when entering or exiting the elevator when the elevator door is closed .

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

An elevator anti-pinch video light curtain system, comprising a camera, the camera is connected to a video light curtain unit that performs anti-pinch control according to the image information obtained by the camera, and the camera is located in the elevator car near the side of the car door The top is used to detect the image between the elevator car door and the hall door; the video light curtain unit is installed on the car and connected with the control unit located on the side of the elevator control cabinet through wired or wireless communication.

Further as a preferred embodiment, the video light curtain unit includes a microprocessor for digital image processing, and the microprocessor is connected to the camera through a USB interface to receive the elevator car door and hall door collected by the camera. After the image is judged by the image detection algorithm, the microprocessor sends a signal to the control unit to stop closing the door through the communication interface.

As a further preferred embodiment, the communication interface is a UART serial port, a wireless communication module or an Ethernet interface.

As a further preferred embodiment, the microprocessor divides the received image information from between the elevator car door and the hall door into three areas, including the first detection area and the first detection area distributed symmetrically on both longitudinal sides of the camera. The second detection area, and the third detection area in the horizontal direction under the camera formed by the elevator during door closing.

As a further preferred embodiment, the microprocessor judges the image information of the first detection area and the second detection area through an image detection algorithm that there is an external object that blocks the inner contour line of the car door or the outer contour line of the hall door or blocks both. Outline of the car door and inside contour of the hall door, the microprocessor sends a signal to the control unit to stop closing the door; the microprocessor judges the image information of the third detection area through an image detection algorithm that there is an external object blocking the inside of the car door Any one of the contour line, the outer contour line of the car door, the inner contour line of the hall door and the outer contour line of the hall door, the microprocessor sends a stop closing signal to the control unit.

As a further preferred embodiment, when the microprocessor detects no external objects in the above three detection areas, it automatically cancels the signal to stop closing the door sent to the control unit.

Further as a preferred embodiment, the microprocessor is connected with an alarm module, and the alarm module is a buzzer. When the microprocessor sends a signal to stop closing the door, the buzzer emits a buzzing alarm sound. When the door closing signal stops, the buzzer stops beeping.

The beneficial effects of the utility model are: the utility model detects the area between the hall door and the car door in a differentiated manner through the images collected by the camera, effectively preventing the passenger from being pinched when the elevator closes the door. The adaptive nature of the algorithm prevents the occurrence of false stop and door closing signals to the greatest extent. Furthermore, because the detection algorithm converts the detection of the opposite side into the detection of the line, the calculation amount is greatly reduced while ensuring the sensitivity, and the economy is improved.

Description of drawings

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural schematic diagram of an elevator anti-pinch touch video light curtain system of the present invention;

Fig. 2 is a schematic diagram of the forward structure of the elevator anti-pinch video light curtain system of the present invention;

Fig. 3 is a schematic diagram of the lateral structure of the elevator anti-pinch video light curtain system of the present invention;

Fig. 4 is a functional block diagram of an embodiment of an elevator anti-pinch video light curtain unit of the present invention.

Detailed ways

Referring to Fig. 1 to Fig. 3, the elevator anti-pinch touch video light curtain system of the present invention, the elevator is provided with a car 30, and the car 30 is provided with a car door 31 for passengers to enter and exit, and each floor is connected with the car at the parking place of the elevator. The door 31 is correspondingly provided with a hall door 10, and the utility model effectively prevents passengers from being pinched when the elevator door is closed by collecting video image information located between the elevator car door 31 and the hall door 10. This video light curtain system comprises camera 32, and described camera 32 is connected with a video light curtain unit 20 that carries out anti-clamping control according to the image information that this camera 32 acquires, and described camera 32 is positioned at elevator car 30 near car door 31 side The top of the elevator car door 31 is used to detect the image between the hall door 10; the video light curtain unit 20 is installed on the car 30, and is connected with the control unit 40 located at the side of the elevator control cabinet through wired or wireless communication .

In the present invention, the camera 32 can be an ordinary camera, because there is generally sufficient light (lights) in the car, and if there is a specific application, a low-illuminance camera can be preferably used. The camera 32 transmits the image of the area between the hall door 10 and the car door 31 to the video light curtain unit 20, and the video light curtain unit 20 judges whether there are passengers entering or leaving the car in the specific detection area according to the received image, thereby passing the communication channel A signal to stop door closing is sent to the control unit 40 located at the side of the elevator control cabinet, so that the hall door 10 and the car door 31 remain at the current position. Further, after a short time delay, if there are passengers in and out of the car 30 in the specific detection area, a buzzer will sound to give an alarm to remind passengers to leave or enter the car, and the alarm signal will disappear automatically when the object is detected to leave the hall door, and Take back the signal to stop opening the door.

Further as a preferred embodiment, with reference to Fig. 4, the video light curtain unit 20 includes a microprocessor 21 for digital image processing, the microprocessor 21 is connected with the camera 32 through the USB interface 22, to receive the The image between the elevator car door 31 and the hall door 10 collected by the camera 32 near the top of the car door 31 side in the elevator car 30, the microprocessor 21 sends the image to the control unit 40 through the communication interface after the image detection algorithm judges Send a signal to stop closing the door.

As a further preferred embodiment, the communication interface adopted by the microprocessor 21 is a UART serial port 23 , a wireless communication module 24 or an Ethernet interface 25 . The microprocessor 21 establishes a wired connection with the control unit 40 through the UART serial port 23 or establishes a wireless connection with the control unit 40 through the wireless communication module 24 . The microprocessor 21 further performs system program debugging and downloading through the Ethernet interface 25 .

Preferably, the microprocessor 21 adopts the S3C6410 ARM11 microprocessor produced by Samsung, and the microprocessor 21 includes a power supply 28 for supplying power to the system and a crystal oscillator 29 that provides a system clock frequency, and the microprocessor 21 is connected with SDRAM (Synchronous Dynamic Random Access Memory, synchronous dynamic random access memory) 26 and NAND FLASH 27, microprocessor 21 supports starting from NAND FLASH 27, and NAND FLASH 27 has the characteristics of large capacity and low price, the utility model adopts NAND FLASH 27 and SDRAM 26 The combination reduces the cost of the system. Further, the microprocessor 21 also includes a buzzer 211 for providing an alarm and a display screen 212 for providing display information.

Further as a preferred embodiment, if the control unit 40 on the elevator control cabinet side and the video light curtain unit 20 on the elevator car 30 only transmit the signal of stopping and closing the door, then the communication system can be composed of a wired communication with a small communication capacity (such as cable) or wireless communication; if the video monitoring function is taken into account, that is, the video light curtain unit 20 also transmits video signals to the control unit 40 located on the side of the elevator control cabinet, a large-capacity communication channel, such as optical fiber and WIFI, is required.

Further as a preferred embodiment, in order to improve the safety and reliability of the system, to ensure that when the camera 32, the video light curtain unit 20, and the communication channel break down, the normal closing of the elevator will not be affected. When the passenger enters or leaves the elevator car, the signal for allowing the elevator to close the door is sent at a certain frequency; once it is detected in a specific area when the passenger enters or exits the elevator car, the signal for allowing the elevator to close the door is stopped, and the elevator car door and hall door will stop closing.

Further as an improvement of the present utility model, the microprocessor 21 divides the image information between the elevator car door 31 and the hall door 10 into three areas, referring to FIG. The first detection area T1 and the second detection area T2 of the elevator, and the third detection area T3 located in the horizontal direction under the camera 32 formed during the door closing process of the elevator. The third detection area T3 changes dynamically with the door closing process of the elevator: there are two connection points C and D between the inner contour line of the car door and the bottom of the car, and two connection points A and B between the outer contour line of the hall door and the floor platform. The third detection area T3 is exactly a quadrangle with four points A, B, C, and D as vertices.

As a further preferred embodiment, the microprocessor 21 uses the same algorithm for the image information of the first detection area T1 and the second detection area T2. Taking the first detection area T1 as an example, it is determined by the image detection algorithm that there is an external object (Foreign objects larger than the effective size) block the inner contour line 7 of the car door 31 or the outer contour line 6 of the hall door 10, the microprocessor 21 sends a signal to the control unit 40 to stop closing the door; in order to prevent passengers from placing narrow objects in the hall Between the door and the car door, the situation of the elevator pinching is sent out. If the microprocessor 21 detects that an external object is deposited and blocks the outer contour line 4 of the car door 31 and the inner contour line 5 of the hall door 10, the microprocessor 21 will also control Unit 40 sends a signal to stop closing the door; the image processing algorithm for the second detection area T2 is similar to the first detection area T1, for example, when the microprocessor 21 detects that an external object blocks the inner contour line 9 of the car door 31 or the hall door 10 The outer contour line 8, the microprocessor 21 sends a signal to stop closing the door to the control unit 40; the microprocessor 21 judges that there is an external object blocking the inner contour line of the car door through the image detection algorithm for the image information of the third detection area T3, Any one of the car door outer contour line, the hall door inner contour line and the hall door outer contour line, the microprocessor 21 sends a signal to the control unit 40 to stop closing the door.

As a further improvement, when the microprocessor 21 does not detect any external objects in the above three detection areas, it automatically cancels the signal to stop closing the door sent to the control unit 40 .

Those skilled in the art can understand that the door closing control signal in the utility model adopts a locking mode, that is, when no passenger is detected in the above-mentioned area when entering or leaving the elevator car, the microprocessor 21 sends a signal to the control unit 40 at a certain frequency to allow the elevator to close the door. Signal: Once in the above-mentioned area, when detecting that the passenger enters and exits the elevator car, the microprocessor 21 stops sending the signal that allows the elevator to close the door, and now the elevator car door and the hall door will stop closing the door.

Further as a preferred embodiment, the microprocessor 21 is connected with an alarm module, and the alarm module is a buzzer 211. When the microprocessor 21 sends a signal to stop closing the door, the buzzer 211 sends a buzzer alarm sound. When microprocessor 21 revoked and stopped the door-closing signal, buzzer 211 stopped buzzing alarm sound.

The above is a specific description of the preferred implementation of the present utility model, but the utility model creation is not limited to the described embodiments, those skilled in the art can also make various equivalent deformations without violating the spirit of the present utility model Or replacement, these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (4)

1. An elevator anti-pinch video light curtain system, comprising a camera (32), and the camera (32) is connected to a video light curtain unit (20) that performs anti-pinch control according to the image information obtained by the camera (32) , characterized in that: the camera (32) is located at the top of the elevator car (30) close to the side of the car door (31), and is used to detect the image between the elevator car door (31) and the hall door (10); The above-mentioned video light curtain unit (20) is installed on the car (30), and is connected with the control unit (40) located on the side of the elevator control cabinet through wired or wireless communication. 2. An elevator anti-pinch video light curtain system according to claim 1, characterized in that: the video light curtain unit (20) includes a microprocessor (21) for digital image processing, the microprocessor The processor (21) is connected to the camera (32) through the USB interface (22) to receive the image between the elevator car door (31) and the hall door (10) collected by the camera (32), and the microprocessor After being judged by the image detection algorithm, the device (21) sends a signal to stop closing the door to the control unit (40) through the communication interface. 3. An elevator anti-pinch video light curtain system according to claim 2, characterized in that: the communication interface is a UART serial port (23), a wireless communication module (24) or an Ethernet interface (25). 4. An elevator anti-pinch video light curtain system according to claim 3, characterized in that: the microprocessor (21) is connected with an alarm module, and the alarm module is a buzzer (211).

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