CN212515949U - Access control system - Google Patents

Abstract

The utility model provides an access control system, which comprises at least one access control area, at least one gate, at least one camera and electronic equipment; each door forbidden zone is divided into a first zone, a second zone and a third zone which are adjacent in sequence; each gate is arranged in the second area of each gate forbidden area; the camera is arranged above the access control area; the visual field of the camera covers the whole range of the at least one door forbidden zone. The utility model discloses need not to use a large amount of infrared sensor group, can effectively shorten the length of floodgate machine passageway, saved the space, utilize the camera to shoot the position of user in the passageway, reduced hardware cost and operation cost.

Description

Access control system

Technical Field

The utility model relates to a technical field of entrance guard's security protection, concretely relates to access control system.

Background

The entrance guard refers to the forbidden right of a door, a generalized door refers to various channels capable of being communicated, an entrance guard system is also called a channel entrance and exit management control system, and the entrance guard system is an intelligent management system for managing personnel, vehicles and the like to enter and exit a specific channel. The gate is a common access control device, is a channel blocking device, is used for managing people flow and standardizing the entrance and exit of pedestrians, is mainly applied to a subway gate system, a charging ticket checking gate system and the like, has the most basic core function of realizing one-time passing and only one-person passing, and can be used for the entrance channel of various charging and access control occasions.

The prior art is mostly infrared formula access control system, need set up a longer passageway, sets up the floodgate machine in the passageway, and the floodgate machine has that the barrier passageway that can open and shut is equipped with a plurality of infrared sensor groups for realize the position monitoring of user in the passageway, judge the real-time position of each user in the floodgate machine passageway, combine user authentication technology again, realize passing at every turn and only one effect. The infrared gate has the disadvantages that the channel of each gate is long, the occupied space is large, a large number of infrared sensor groups are arranged in the gate, the hardware cost is high, and the price is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the gate machine occupation space that prior art's access control system exists great, the hardware cost is higher, the expensive technical problem of price.

In order to achieve the above object, the present invention provides an access control system, which includes at least one access control area, at least one gate, at least one camera and an electronic device; each door forbidden zone is divided into a first zone, a second zone and a third zone which are adjacent in sequence; each gate is arranged in the second area of each gate forbidden area; the camera is arranged above the access control area; the visual field of the camera covers the whole range of the at least one door forbidden zone; the electronic equipment is connected to the gate and the camera respectively.

Further, the access control system further comprises an identity detection device, wherein the identity detection device is arranged opposite to the first area or the second area and is connected to the electronic equipment.

Further, the identity detection device is an identity identification device, including but not limited to a two-dimensional code reader.

Further, the door access system further includes a mounting bracket mounted to a lower ceiling surface or an upper floor surface or a ground surface; the camera is secured to the mounting bracket.

Furthermore, the gate comprises an openable barrier, and two sides of the openable barrier are respectively opposite to the first area and the third area.

Further, the gate also includes a power device connected to the discourager; when the gate machine receives a gate closing instruction, the power device controls the barrier to be opened; when the gate receives a gate opening command, the power device controls the blocking piece to be closed.

Further, the gate further comprises a locking device connected to the barrier; when the gate machine receives a gate closing instruction, the locking device locks the barrier; when the gate machine receives a gate opening instruction, the locking device unlocks the barrier piece.

Further, the discouragers include, but are not limited to, a three-roll gate, a swing gate, a wing gate, a rotary gate, and a translation gate.

Furthermore, the access control system also comprises at least one channel, wherein two sides of each channel are provided with mutually opposite separators or separation lines, two ends of each channel are provided with mutually opposite inlets and outlets, and each door forbidden zone is positioned in one channel.

Further, the partition is a railing or a baffle; the isolation line is a marking line arranged on the ground.

The beneficial effects of the utility model reside in that, a access control system is provided, adopt the scheme that sets up the camera above the passageway, utilize the camera to shoot the real-time image and the real-time position of each user in the passageway in real time. The utility model discloses in, hardware equipment only needs to provide floodgate machine and camera, need not to use a large amount of infrared sensor group, can effectively shorten entrance guard's passageway length, saves space, and manufacturing, operation and maintenance cost are lower.

Drawings

Fig. 1 is a top view of an unmanned convenience store according to an embodiment of the present invention;

fig. 2 is a top view of an access control system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an access control system according to an embodiment of the present invention;

fig. 4 is a block diagram of an access control system according to an embodiment of the present invention;

fig. 5 is a flowchart of a control method of an access control system according to an embodiment of the present invention;

fig. 6 is a flowchart of another access control system control method according to an embodiment of the present invention;

fig. 7 is a flowchart of the background image obtaining step according to an embodiment of the present invention;

fig. 8 is a flowchart of the passage detection step according to the embodiment of the present invention;

FIG. 9 is a flowchart illustrating steps for determining whether a user is present in an area according to an embodiment of the present invention;

fig. 10 is a flowchart of the image comparison step according to an embodiment of the present invention;

fig. 11 is a flowchart of the user position determining step according to an embodiment of the present invention;

fig. 12 is a flowchart of another step of determining the user position according to an embodiment of the present invention.

The various components in the figures are numbered as follows:

1. a closed space, 11, a user inlet, 12, a user outlet, 2, a shelf,

3. an access control system 31, a door forbidden zone 32, a gate 33 and a camera,

34. electronic equipment 35, identity detection device 36, mounting bracket 37, channel,

311. a first region, 312, a second region, 313, a third region, 314, a fourth region,

321. barrier, 341, memory, 342, processor.

Detailed Description

The preferred embodiments of the present invention will be fully described below with reference to the accompanying drawings, so that the technical contents thereof will be more clearly understood. The present invention may be embodied in many different forms of embodiments and its scope is not limited to the embodiments described herein.

In the drawings, elements having the same structure are denoted by the same reference numerals, and elements having similar structure or function are denoted by the same reference numerals throughout. The directional terms used in the present invention, such as upper, lower, front, rear, left, right, inner, outer, etc., are only directions in the drawings, and are only used for explaining and explaining the present invention, but not for limiting the protection scope of the present invention.

When certain components are described as being "on" another component, the components can be directly on the other component; there may also be an intermediate member disposed on the intermediate member and the intermediate member disposed on the other member. When an element is referred to as being "mounted to" or "connected to" another element, they may be directly "mounted to" or "connected to" the other element or indirectly "mounted to" or "connected to" the other element through an intermediate element.

As shown in fig. 1, 2, and 3, the present embodiment provides an access control system that can be used in an unmanned convenience store, which is a closed space 1 in which a plurality of shelves 2 are placed. An entrance guard system 3 is arranged at a user entrance 11 of the unmanned convenience store and is used for identifying the user identity, allowing a legal user to enter the enclosed space 1 and preventing an illegal user from entering the enclosed space 1. An entrance guard system 3 is arranged at a user exit 12 of an unmanned convenience store, so that the user is allowed to go out of the enclosed space 1 without identifying the user identity, and meanwhile, illegal users are prevented from entering the enclosed space 1 through the user exit. Of course, in other embodiments, the enclosed space 1 may also be a relatively enclosed space such as a subway station, a cell, etc., and the access control system 3 may be used for entrances and exits in these situations. In this embodiment, access control system 3 in the convenience store entrance need realize obtaining user's identity information, preventing that the user from going against, preventing the technical effect who presss from both sides the people and prevent trailing, and access control system 3 in the exit only need realize preventing that the user from going against, prevent that the people effect is pressed from both sides can.

As shown in fig. 2, the present embodiment provides an access control system 3, which includes at least one channel 37, and an inlet and an outlet are respectively disposed at two ends of each channel. In some embodiments, each channel 37 may be provided with a partition or a partition line on both sides, and a partition line may be provided at the inlet or outlet.

As shown in fig. 1-4, the access control system 3 includes at least one forbidden zone 31, at least one gate 32, at least one camera 33, and an electronic device 34.

Each forbidden zone 31 is arranged in the channel 37, and the shape and the size of the forbidden zone are the same as those of the bottom surface of the channel 37. The width of the passageway of the door forbidden zone 31 is preferably 0.6-1.5 m, the isolation piece is preferably a railing or a baffle, the isolation line is an identification line arranged on the ground, as shown in fig. 2, the isolation line with a certain width is preferably selected in the embodiment, and the width is preferably 2-10 cm.

The portion of each forbidden zone 31 disposed in a channel is divided into a first zone 311, a second zone 312 and a third zone 313 which are adjacent to each other in sequence. The first zone 311 is an entrance zone, the second zone 312 is a gate zone, and the third zone 313 is an exit zone. In this embodiment, the boundary line of each channel 37 is virtual and invisible to human eyes, and the worker inputs the position of the boundary line into the electronic device 34; in other embodiments, the boundary line of each channel may also be a visible spacer or an isolation line, and the electronic device identifies the boundary range of the forbidden zone through the camera 33.

Further, the access region 31 may also extend from the entrance of the channel 37 to the outside of the channel 37. The forbidden zone 31 can also comprise a fourth zone 314, located outside said channel 37, opposite to the channel entrance and connected to the first zone 311, the fourth zone 314 being an anti-tailing zone, preferably rectangular or fan-shaped or semicircular, connected to the channel entrance in the middle of one side thereof. Generally, when a user enters the entrance area (first area 311) of the passageway, the fourth area 314 outside the passageway is free of people; if there is a person in the fourth area 314, the gate 32 should not be opened to achieve the anti-tailing effect of the access control system 3.

Each gate 32 is disposed in the second area 312 of each forbidden zone 31 and is respectively connected to an electronic device 34, and the electronic device 34 is used for issuing a gate opening command and a gate closing command to the gate 32. The gate 32 includes an openable barrier 321, and both sides thereof are disposed opposite to the first and third regions 311 and 313, respectively. When the gate 32 receives a gate opening command, the barrier is controlled to be opened actively or passively; when the gate 32 receives a gate closing command, the control barrier 321 is actively or passively closed. The discourager 321 includes, but is not limited to, a three-roller gate, a swing gate, an airfoil gate, a rotary gate, and a translation gate.

In this embodiment, the gate 32 further comprises a power device (not shown) connected to the barrier. The power means is preferably an electric motor for driving the barrier member to perform the opening and closing actions. When the gate 32 receives a gate opening command, the power device controls the barrier to open; when the gate 32 receives a gate closing command, the power device controls the barrier to close. In other embodiments, the gate 32 further comprises a locking device (not shown) that unlocks the barrier when the gate 32 receives an open command; when the gate 32 receives a gate closing command, the locking device locks the barrier. The gate 32 may be any one of the existing gates, the power device and the locking device being of a construction commonly found in existing gates.

As shown in fig. 2 and 3, the door access system 3 further includes a mounting bracket 36 mounted to the lower surface of the ceiling or the upper surface of the floor or the floor, and the camera 33 is fixed to the mounting bracket 36. At least one camera 33 disposed above the door forbidden zone 31 and connected to the electronic device 34; the field of view of the camera 33 covers the whole range of the at least one door forbidden zone 31, the camera 33 is disposed right above any one area in the door forbidden zone 31, preferably, the camera 33 is fixed right above the middle part in one door forbidden zone 31, and the lens of the camera 33 faces the door forbidden zone 31. The camera 33 is a two-dimensional camera or a three-dimensional camera, and can acquire a plurality of frames of two-dimensional images or three-dimensional images, and is configured to acquire a real-time image of the forbidden region and transmit the real-time image to the electronic device 34.

As shown in fig. 4, the electronic device 34 is preferably a computer or a server, and performs image processing on the image acquired by the camera 33, monitors whether a user exists in the forbidden zone 31 in real time, determines a real-time position of the acquired user in the forbidden zone 31, and further controls the gate 32 to be opened and closed. Compared with the traditional access control system, the position of the user is judged without installing a large number of infrared sensors, the length of the access control system 3 can be effectively reduced, the space is saved, and the hardware cost of the access control system 3 is reduced.

The access control system 3 further includes an identity detection device 35 for acquiring identity information of a user, connected to the electronic device 34, and disposed opposite to the first region 311 or the second region 312. The identity detection device 35 is an identification device, including but not limited to a two-dimensional code reader, an RFID signal reading device, or an NFC signal reading device, and is optionally disposed on the gate 32. After a user finishes registration at a certain mobile phone APP, the APP can automatically generate a two-dimensional code, namely the identity of the user, or the user can use an identity card with a built-in RFID chip as the identity. When the user stands in the first area 311, the mobile phone interface or the identity card may be brought close to the identity detection device 35 to complete code scanning or card reading, and the identity detection device 35 may obtain the identity information of the user according to the identity identification code and transmit the identity information to the electronic device 34.

In the embodiment, each user downloads special application software (APP) matched with the unmanned convenience store to a mobile communication terminal (a mobile phone, a tablet computer and the like), registers an account in the application software (APP) and associates the account with payment software; or each user downloads payment software (such as WeChat/Paibao) into the mobile communication terminal, a small program matched with the unmanned convenience store is embedded into the payment software, an account is registered in the payment software, and user registration information and electronic payment information including user identity information, bank account information, payment passwords and the like are arranged in the special application software (APP) or the payment software. After the registration is completed, the user identity information is stored in the user database of the access control system 3.

The application software (APP) in the mobile communication terminal can generate a two-dimensional code, the identity information and the like of a user are stored in the two-dimensional code, when a certain user needs to enter the enclosed space 1 from the outside, the two-dimensional code generated by the application software is directly opposite to the scanning end of the identity detection device 35, the identity detection device 35 decodes the two-dimensional code after code scanning, if the two-dimensional code is identifiable and the identified identity information is matched with the identity information stored in the user database in advance, the identity of the user is determined to be legal, the access control system 3 opens the gate 32 to allow the user to enter the gate forbidden area 31, the user enters the channel 37 and passes through the gate forbidden area 31, the access control system 3 detects that someone passes through the second area 312 where the gate 32 is located to enter the third area 313, and then automatically closes the gate 32.

The electronic device 34 comprises a memory 341 and a processor 342, wherein the memory 341 is provided with a storage medium for storing executable program codes, and the processor 342 is connected to the memory 341 and executes a computer program corresponding to the executable program codes by reading the executable program codes to execute several steps of an access control system control method.

As shown in fig. 5 and 6, the control method of the access control system 3 includes the following steps S1-S11.

S1, setting an entrance guard area, namely, setting at least one channel 37, wherein two sides of each channel 37 are provided with a separator or a separation line, and two ends of each channel 37 are respectively provided with an inlet and an outlet; a door zone is arranged in each channel 37, the door zone 31 is divided into a first zone 311, a second zone 312 and a third zone 313 which are connected in sequence, and the first zone 311, the second zone 312 and the third zone 313 are arranged in the channel 37. Optionally, the access area 31 may further include a fourth region 314 disposed outside the channel 37 and connected to the first region 311, a middle portion of one side of the fourth region being disposed opposite to the entrance of the channel 37, and the fourth region 314 is preferably rectangular, or fan-shaped, or semicircular. In this embodiment, the gate inhibition system at the entrance of the convenience store may set the fourth area 314 to achieve the technical effect of preventing tailgating, and the gate inhibition system at the exit of the convenience store does not need to set the fourth area 314 and does not have the requirement of preventing tailgating.

S2, a gate setting step, in which a gate 32 is set in the second area 312 of each door forbidden zone 31, and the gate 32 includes an openable barrier to divide the passage 37 into two parts. The discouragers include, but are not limited to, a three-roll gate, a swing gate, a wing gate, a rotary gate, and a translation gate.

S3, a camera setting step, in which at least one camera 33 is set right above each channel 37 and connected to an electronic device 34, and the camera 33 covers the whole range of the door forbidden zone 31. The camera 33 is a two-dimensional camera or a three-dimensional camera, and can acquire a plurality of frames of two-dimensional images or three-dimensional images.

S4, obtaining a region range, obtaining a range of each region in the forbidden zone 31, in this embodiment, two sides of the channel 37 are provided with a spacer or a separation line, the separation line is provided between each region in the channel 37, the separation lines are provided at the entrance and the exit at two ends of the channel 37, the spacer or the separation line forms a boundary of each region, and the electronic device 34 can take a picture through the camera 33 to obtain the boundary of each region, so as to obtain the range of each region. In other embodiments, the location and size of the various regions may also be entered into the electronic device 34 by way of entered data. A two-dimensional coordinate system or a three-dimensional coordinate system is established in the door forbidden zone 31, and a coordinate range of each area under the coordinate system is calculated according to a preset size and shape of each area in the door forbidden zone 31.

S5, a step of starting the gate, in which the electronic device 34 sends a command for starting the gate to start the gate 32, and then sends a gate closing control command to the gate 32, and executes a step S11 of controlling the gate to ensure that the gate 32 is kept in a closed state when no one enters the passage 37.

S6, a step of finding a user, in which the electronic device 34 acquires a position of the user in the access control area 31 in real time by using the camera 33, and detects whether the user exists in the first area 311; if yes, executing the next step. When a user enters the door forbidden zone 31 from the entrance of the passageway, the electronic device 34 selectively executes the steps S7-S9 or directly executes the step S9 according to actual conditions. In the convenience store, before entering the store, the identity of the user needs to be verified, and the identity information of the user is acquired, so that people are prevented from following the store; as shown in fig. 5, if the access control system is installed at the entrance of the convenience store, steps S7-S9 are required after step S6. As shown in fig. 6, when the user leaves the store, the user does not need to be authenticated again and whether the user is trailing or not is not considered, and if the access control system 3 is installed at the exit of the convenience store, the step S9 may be directly executed after the step S6.

S7, an identity authentication step, in which the electronic device 34 collects identity authentication information in real time and judges whether the identity authentication information is legal; if not, sending an alarm signal; if yes, executing the next step; the verification information is a user identification code, including but not limited to an RFID signal, an NFC signal, and a two-dimensional code. If any verification information cannot be collected or the identity verification information is illegal within a preset time period, the electronic device 34 sends an alarm signal to an alarm. If the user stands in the first area 311 of the entrance and does not scan the code for a long time, the passage 37 is blocked, and other people are prevented from normally passing; if the user in the channel 37 is not registered by using the APP software, and the electronic device 34 cannot acquire a valid two-dimensional code, it is determined that the user is an illegal user; once both of these events occur, the electronic device 34 will send an alarm signal to indicate that the gate 32 is in a closed position. If the user has registered with the APP software, the electronic device 34 may obtain the valid two-dimensional code, determine that the user is a valid user, and perform the following steps S8-S9 or directly perform step S9.

S8, a trailing determination step, in which the electronic device 34 uses the camera 33 to detect whether the user exists in the fourth area 314 in real time; if yes, sending out an alarm signal; if not, executing the switching-off control step. The trailing judgment step is to prevent a user from trailing after the user scans the code and ensure that only one person is scanned each time. The tailing judging step S8 is not necessary, and if the fourth area 314 is not provided in step S1, it is not necessary to judge whether there is a tailing, and step S9 may be directly performed after step S7.

S9, a switching-off control step, in which the electronic device 34 determines in real time whether the user exists in the second area 312 and the third area 313 by using the camera 33; if yes, the electronic device 34 sends an alarm signal, otherwise, the electronic device 34 sends an opening command to the gate 32. If the electronic device 34 acquires that the authentication information of a user is legal, it sends an opening command to control the gate 32 to open. However, before opening the gate, it is necessary to determine that the second area 312 where the gate 23 is located and the third area 313 at the exit are not occupied by people, otherwise, the situation that people go backwards from the exit of the tunnel 37 and the tunnel 37 is congested may occur.

S10, a pass detection step, in which the electronic device 34 uses the camera 33 to detect whether a user passes through the second area 312 and enters the third area 313 in real time; if yes, executing the next step. If no user enters the second area 312 within a preset time period, an alarm signal is sent out, and the gate-off control step is executed. After the gate is opened, if the user stands in the first area 311 of the entrance for a long time and does not move, the channel 37 is blocked, the user normally enters and exits, and the electronic device 34 gives a gate closing alarm.

S11, a gate closing control step, in which the electronic device 34 utilizes the camera 33 to determine whether a user exists in the second area 312 in real time; if yes, sending out an alarm signal; if not, a gate closing instruction is sent to the gate 32, and the authentication step is returned. Before each time the gate 32 is closed, the electronic device 34 needs to determine whether a person is in the second area 312 in time, and then can control the gate 32 to close to prevent the person from being caught.

If the floor space at the entrance of the convenience store is small, the fourth area 314 is not provided in step S1, and the step S8 trailing determination step cannot be performed, the anti-trailing effect cannot be achieved. For this reason, in the present embodiment, the time interval at which the passage detection step S10 and the gate off control step S11 are executed may be set to be less than or equal to 0.5 seconds. The purpose of the short time interval is to close the door quickly and also to achieve the anti-trailing effect, so as to ensure that only one person is allowed to pass through the gate channel after the electronic device 34 acquires the identity information of one user.

In the above steps of the access control method, steps S1-S5 are all hardware setting steps, and the processor 342 of the electronic device 34 reads the executable program code to run the computer program corresponding to the executable program code, so as to execute steps S6-S11. In the embodiment, as shown in fig. 5, when the gate 32 is installed at the entrance of the convenience store, the electronic device 34 needs to execute steps S6-S11 to achieve the technical effects of user identity acquisition and legality verification, user retrograde motion prevention, person clamping prevention and tailgating prevention; as shown in fig. 6, when the gate 32 is installed at the exit of the convenience store, the electronic device 34 only needs to execute the steps S6, S9, S10 and S11, and only needs to achieve the technical effects of preventing the user from going backwards and preventing the user from being pinched.

Even if the door access system 3 is installed indoors, the light intensity and color of the door access system may be affected by environmental images (e.g., natural light or artificial light), which may cause the image of the door forbidden area 31 to change in an unmanned state. For example, the intensity, direction and color of the natural light in the morning and afternoon are different, and the color parameter of each pixel on the background image changes, so the background image needs to be updated in time. A updating method is that background images at different moments are stored in a database, and the background images are called and updated at regular intervals; another updating method is to collect background images in real time at regular intervals and store the images in a database.

As shown in fig. 5, in the access control system control method according to this embodiment, after the area range obtaining step S4 and before the trailing determination step S8, a step S20 of obtaining a background image is further included, where the electronic device 34 obtains and stores the background image of the door forbidden zone 31 in a no-user state by using the camera 33, and periodically updates the background image according to the change of the ambient light.

As shown in fig. 7, the background image acquiring step S20 specifically includes the following steps S21-S23, which is a scheme of acquiring background images at regular intervals in real time.

S21, acquiring M frames of real-time images of the door forbidden zone 31 in a no-user state by using a camera; the acquisition frequency of the camera 33 is preferably 30 frames per second, i.e. 30 RGB images can be acquired per second.

S22, acquiring the position parameter and the color parameter of each pixel point of each frame of real-time image; when the position parameters are x and y, representing the position coordinates of the pixel point in the two-dimensional coordinate system; when the position parameters are x, y and z, representing the position coordinates of the pixel point under the three-dimensional coordinate system; the color parameters are r, g and b, which respectively represent the three primary color intensities (RGB values) of the pixel point.

S23, in the M frames of real-time images, if N pixels with the same position parameter and the same color parameter exist in multiple frames of different real-time images, and N is greater than 0.9 × M and less than or equal to M, determining that the image composed of the N pixels is a background image. In a continuously acquired multi-frame two-dimensional or three-dimensional image, if the color parameters of N pixels belonging to different images and having the same position parameter are the same, or most of the N pixels (e.g., 90%) are the same, the pixel is determined as a background pixel, and the image formed by the pixel is the background image.

In some embodiments, in the background image obtaining step S20, an image of each area in the forbidden zone 31 in a no-user state can be directly collected as the background image. In this case, the background image is changed periodically to eliminate the effect of the different light, for example, the background image is updated every 10-20 minutes.

As shown in fig. 8, in this embodiment, whether a user passes through a passage (a door forbidden zone) is determined by determining whether a person is in a certain area within a preset time period. The passage detection step S10 specifically includes the following steps S901 to S902. Normally, after the gate is opened, the user will pass through the passageway (the forbidden zone) within a few seconds.

S101, a second area detection step, namely acquiring the position of a user in the entrance guard area 31 in real time by using the camera 33 within a preset time period after a brake opening instruction is sent out, and detecting whether the user exists in a second area 312; if yes, executing the next step. The preset time period is the longest time for a general user to enter the second area 312 from the first area 311, and is preferably 5 seconds. If no user is detected in the second area 312 within a preset time period (5 seconds), which indicates that the user is likely to exit the first area 311 from the entrance or still stand in the first area 311, it may be determined whether the user is in the first area 311 and/or the fourth area 314, and if so, an alarm signal may be sent to prompt the user to pass as soon as possible; if not, executing the gate closing control step.

S102, a third area detecting step, in which, within a preset time period after detecting that a user exists in the second area 312, a camera 33 is used to obtain a position of the user in the access control area 31 in real time, and whether the user exists in the third area 313 is detected; if yes, it is determined that there is a user entering the third area 313 through the second area 312. The preset time period is the longest time that a general user passes through the second area 312, and is preferably 5 seconds. If no user is detected in the third area 313 within a preset time period (5 seconds), which indicates that the person is likely to exit the second area 312 from the entrance or stand in the second area 312, it may be determined whether the user is in the first area 311, the second area 312, or the fourth area 314, and if so, an alarm signal may be sent to prompt the user to pass as soon as possible; if not, executing the gate closing control step.

After the gate 32 receives the opening command, in a normal situation, the user standing in the first area 311 will enter the third area 313 through the second area 312 within 5 seconds or 10 seconds and leave from the exit of the passageway 37, and this process can be completely monitored by the camera 33 and recognized and recorded by the electronic device 34, so that it is determined that the user passes through the door forbidden area 31, and the action of passing through the passageway 37 is completed. In the passage detection step S10, after the user passes through the passage 37, the gate 32 is closed as soon as possible to achieve the effect of passing only one person at a time, and simultaneously achieve the effect of preventing people from being pinched and tailgating.

As shown in fig. 9, in each of the above steps S6, S8-S11, there is a step in which the electronic device 34 uses the camera 33 to obtain the position of the user in the access area 31 in real time, specifically including the following steps S211-S213.

Step S211, a real-time image collecting step, wherein the camera 33 is used to collect at least one frame of real-time image of the forbidden region in real time.

Step S212, an image comparison step, namely judging whether the real-time image of the door forbidden zone is the same as the background image of the door forbidden zone 31 in a user-free state, if so, judging that no user exists in the door forbidden zone 31, and returning to the real-time image acquisition step; if not, determining that the user exists in the door forbidden zone 31.

As shown in fig. 10, the image comparison step S212 specifically includes the following steps S2121 to S2124. S2121, a background image parameter obtaining step, namely obtaining a position parameter and a color parameter of each pixel point in the background image. S2122, a real-time image parameter obtaining step, namely obtaining the position parameter and the color parameter of each pixel point in the real-time image. S2123, a difference pixel point recording step of respectively comparing each pixel point of the real-time image and the background image; when the position parameters of the two pixel points respectively positioned in the real-time image and the background image are the same but the color parameters are different, the pixel points positioned in the real-time image are recorded as difference pixel points. S2124, judging the number of the difference pixels, namely judging whether the number of the difference pixels is smaller than a preset threshold value, if so, judging that the real-time image is the same as the background image, and returning to the real-time image acquisition step; if not, it is determined that the real-time image is different from the background image, and it may be determined that a user exists in the forbidden zone 31, and the set of the plurality of difference pixels is the user image in the forbidden zone 31. The step of acquiring the position of the user in the access area 31 by the electronic device in real time through the camera 33 is mainly completed by using an image comparison mode. Whether the real-time picture and the background picture in the area are the same or not can be judged quickly. The background image and the real-time image are pictures or videos.

S213, a user position determining step, which determines the position of the user in the forbidden zone 31, and determines whether a user exists in each zone (the first zone, the second zone, the third zone, and the fourth zone) of the forbidden zone 31.

As shown in fig. 11, in this embodiment, the user position determining step S213 specifically includes the following steps S2131 to S2133. The range of each area is found out in the background image, the position range of the user is found out in the real-time image, and the two areas are compared to judge which area of the door forbidden area the user is located in.

S2131, obtaining the position parameter range of the image of each area in the door forbidden zone in the background image; and acquiring position parameters of a plurality of boundary pixel points in the background image by identifying the boundary line of each area in the gate forbidden zone. S2132, obtaining a position parameter range of a user image of a user in the real-time image, wherein the user image is a set of a plurality of difference pixel points of the real-time image and the background image. And S2133, judging whether the position parameter range of the user image of the user is partially overlapped with the position parameter range of an area, and if so, judging that the user is located in the area.

As shown in fig. 12, in another embodiment, the step S213 of determining the user position specifically includes the following steps S21310 to S21330. A coordinate system is established on a horizontal plane (such as the ground), the coordinate range of each area of the door forbidden zone under the coordinate system is stored in the electronic equipment in advance, the coordinate range of the user under the coordinate system is calculated according to the position range of the user in the real-time image, and the coordinate range can be judged to be positioned in which area of the door forbidden zone the user is positioned after the coordinate range is compared with the position range of the user in the real-time image.

S21310, calculating a coordinate set of a user in a horizontal coordinate system in real time according to the position parameters of the differential pixels of the real-time image and the background image in the real-time image, where the coordinate set is a set of coordinates of the differential pixels in the horizontal coordinate system.

S21320, obtaining a coordinate set of each area in the door forbidden zone under a horizontal plane coordinate system.

S21330, judging whether the coordinate set of the user in the horizontal plane coordinate system is intersected with the coordinate set of an area in the horizontal plane coordinate system, and if so, judging that the user is located in the area.

This embodiment adopts the scheme that sets up camera 33 above floodgate machine 32, utilizes computer image recognition technology to judge each user's real-time position in real time, controls closing or opening of floodgate machine 32 to realize the effect of only passing alone at every turn, can also solve simultaneously and acquire user's identity information, prevent that the user from moving in the wrong direction, prevent pressing from both sides the people, prevent the technical problem of trailing. Hardware equipment only needs to provide the gate 32 and the camera 33, user positioning equipment such as an infrared sensor group is not needed, the length of a gate channel can be effectively shortened, space is saved, and operation and maintenance cost is low.

The utility model provides an access control system adopts the scheme that sets up the camera above the passageway, utilizes the camera to shoot the real-time image and the real-time position of each user in the passageway in real time. The utility model discloses in, hardware equipment only needs to provide floodgate machine and camera, need not to use a large amount of infrared sensor group, can effectively shorten entrance guard's passageway length, saves space, and manufacturing, operation and maintenance cost are lower.

The above description is only of the preferred embodiments of the present invention, so that those skilled in the art can more clearly understand how to practice the present invention, and these embodiments do not limit the scope of the present invention. For those skilled in the art, without departing from the principle of the present invention, several improvements and decorations can be made, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An access control system, comprising:

each gate forbidden zone is divided into a first zone, a second zone and a third zone which are adjacent in sequence;

at least one gate, each gate is arranged in the second area of each gate forbidden zone;

the camera is arranged above the access control area; the visual field of the camera covers the whole range of the at least one door forbidden zone; and

and the electronic equipment is respectively connected to the gate and the camera.

2. The door access system of claim 1, further comprising

And the identity detection device is arranged opposite to the first area or the second area and is connected to the electronic equipment.

3. The door access system of claim 2,

the identity detection device is identity identification equipment and comprises a two-dimensional code reader.

4. The door access system of claim 1, further comprising

A mounting bracket mounted to a lower ceiling surface or an upper floor surface or a floor surface; the camera is secured to the mounting bracket.

5. The door access system of claim 1,

the gate comprises an openable barrier, and two sides of the gate are respectively opposite to the first area and the third area.

6. The access control system of claim 5, wherein the gate further comprises

A power device connected to the barrier; when the gate machine receives a gate closing instruction, the power device controls the barrier to be opened; when the gate receives a gate opening command, the power device controls the blocking piece to be closed.

7. The access control system of claim 5, wherein the gate further comprises

A locking device connected to the barrier; when the gate machine receives a gate closing instruction, the locking device locks the barrier; when the gate machine receives a gate opening instruction, the locking device unlocks the barrier piece.

8. The door access system of claim 5,

the barrier comprises a three-roller gate, a swing gate, a wing gate, a rotary gate and a translation gate.

9. The door access system of claim 1, further comprising

At least one channel, two sides of each channel are provided with mutually opposite isolating parts or isolating lines, two ends of each channel are provided with mutually opposite inlets and outlets, and each door forbidden zone is positioned in one channel.

10. The door access system of claim 9,

the isolating piece is a railing or a baffle;

the isolation line is a marking line arranged on the ground.

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