An automatic dust-proof iris acquisition device and method

Abstract

The present invention discloses an automatically dust-proof iris acquisition device and method. The device includes: an outer housing, an iris acquisition device, a filter switching device, and a human body sensing device; a door body and a display screen are provided on the surface of the outer housing; the iris acquisition device, the filter switching device, and the human body sensing device are installed inside the outer housing; the iris acquisition device includes a lens, an image sensor, an infrared lamp, a mounting rack, and a main control unit; the filter switching device includes a mounting rack, a filter disc changer, and a changer driver; the human body sensing device is used to control the startup of the changer driver and the main control unit when a human body enters its sensing range. The present invention can meet the use of the iris recognition device in a working environment with relatively large dust, avoid the decline in image quality caused by the accumulation of substances such as dust on the surface of the lens, and ensure the recognition accuracy rate.

Description

Technical Field

[0001] The present invention relates to the technical field of iris recognition devices, and more specifically, to an iris acquisition device and method with automatic dust prevention. Background Art

[0002] Advantages such as the accuracy, stability, and non-contact nature of iris recognition technology. With the progress of technology, iris recognition devices are being applied in more and more different scenarios. In practice, it has been found that when existing iris recognition devices are applied in industrial enterprises with harsh external environments such as coal mining enterprises, coal yards in power plants, ore yards, and construction sites, their lenses are easily affected by dust and other substances in the external environment. Substances such as dust and powder accumulate on the lens surface over a long time and no one cleans them, resulting in a decline in the quality of the acquired iris images, ultimately affecting the recognition accuracy. To address the above problems, a Chinese patent with the application number CN202020704288.1 discloses an iris acquisition device that can automatically clean the lens surface. By setting up mechanisms such as an integrated water tank, a small water pump, a liquid inlet pipe, an outlet valve, a cleaning cloth, an atomizing nozzle, and a hot air blower, it uses the method of scrubbing and drying the surface of the iris lens to remove the dust adhering to its surface. The problem with this technical solution is that it requires manual control of the lifting by the user, resulting in a reduced degree of automation and prone to misoperation. Its lifting speed is slow, causing the recognition speed to slow down and the user experience to deteriorate. In addition, the cleaning method of atomizing and wiping will cause the problem that dust adheres to the surface of the cleaning cloth after working for a period of time, ultimately resulting in water stains on the lens surface or being unable to be wiped clean after wiping, still affecting the iris recognition effect. Therefore, how to develop a new type of iris recognition device to overcome the above problems existing in the prior art is the direction that those skilled in the art need to study. Summary of the Invention

[0003] The purpose of the present invention is to provide an iris recognition device that can meet the use of iris recognition devices in working environments with a large amount of dust, avoid the decline in image quality caused by the accumulation of dust and other substances on the lens surface, and ensure the recognition accuracy.

[0004] The technical solution it adopts is as follows:

[0005] An automatic dust-proof iris acquisition device, comprising: an outer housing, an iris acquisition device, a filter switching device and a human body sensing device; a door body and a display screen are arranged on the surface of the outer housing; the iris acquisition device, the filter switching device and the human body sensing device are respectively installed inside the outer housing; the iris acquisition device includes a lens, an image sensor, an infrared lamp and a main control unit; the main control unit is used to control the opening / closing of the iris acquisition device; the lens is arranged facing the door body; the filter switching device includes a mounting rack, a filter sheet switcher and a switch driver; a filter working position is arranged on the mounting rack, and the filter working position is located between the lens and the door body; the filter sheet switcher is movably connected to the mounting rack, and a first filter sheet and a second filter sheet are arranged thereon; the switch driver is electrically connected to the filter sheet switcher and is used to alternately switch and move the first filter sheet and the second filter sheet to the filter working position; the human body sensing device is respectively electrically connected to the switch driver and the main control unit and is used to control the switch driver and the main control unit to start working when a human body enters its sensing range; the display screen is electrically connected to the main control unit and is used to display the iris recognition result.

[0006] By adopting this technical solution: when the human body is not close to the device, the first filter sheet blocks the lens to prevent it from being contaminated with dust. When the human body approaches the device, the clean second filter sheet is switched to the filter working position, and at the same time the iris acquisition device starts to work. When the human body moves away from the device again, the first filter sheet is switched back to block the lens to prevent the surface of the second filter sheet from being contaminated with dust.

[0007] Preferably, in the above automatic dust-proof iris acquisition device: a voice module is further included, and the voice module is electrically connected to the main control unit and is used to play a pre-stored voice file when the display screen is working.

[0008] By adopting this technical solution: the voice linkage playback function is added, enriching the display effect.

[0009] Preferably, in the above automatic dust-proof iris acquisition device, a micro air pump and a silica gel tube are further included; one end of the silica gel tube is connected to the micro air pump and the other end is arranged facing the filter working position.

[0010] By adopting this technical solution: the micro air pump blows air to the filter working position through the silica gel tube to realize the periodic air blowing and cleaning of the filter sheet.

[0011] Preferably, in the above automatic dust-proof iris acquisition device: a detachable filter element is installed at the air inlet hole of the micro air pump.

[0012] By adopting this technical solution: the filter element is used to pre-filter the air flow blown into the inner part of the outer housing.

[0013] More preferably, in the above automatic dust-proof iris acquisition device: the display screen adopts a touch display screen.

[0014] More preferably, in the above iris acquisition device with automatic dust prevention: the human body sensing device adopts any one of a radar ranging module and a pyroelectric infrared sensor for human body.

[0015] More preferably, in the above iris acquisition device with automatic dust prevention: the switch driver includes an MS3111S driver chip.

[0016] More preferably, in the above iris acquisition device with automatic dust prevention: the filter switcher adopts a QM203-M00-41-647AR22 switcher.

[0017] Based on the above iris acquisition device with automatic dust prevention, the present invention also discloses an iris acquisition method with automatic dust prevention, and its technical solution is as follows:

[0018] An iris acquisition method with automatic dust prevention, which includes the following steps:

[0019] Step 1: The human body sensing device works continuously. When it senses that a human body enters its sensing range, it jumps to Step 2. When it senses that a human body leaves its sensing range, it jumps to Step 6;

[0020] Step 2: The human body sensing device outputs a start signal to the switch driver and the main control unit;

[0021] Step 3: The switch driver controls the filter switcher to switch and move the second filter to the filtering station, and at the same time the main control unit controls the iris acquisition device to start working;

[0022] Step 4: The iris acquisition device acquires the iris image of the human eye and outputs the iris recognition result to the display screen;

[0023] Step 5: The display screen displays the iris recognition result, and at the same time the voice module plays a pre-stored voice file;

[0024] Step 6: When the human body leaves the sensing range, the human body sensing device outputs a shutdown signal to the switch driver and the main control unit;

[0025] Step 7: The switch driver controls the filter switcher to switch and move the first filter to the filtering station, and at the same time the main control unit controls the iris acquisition device to stop working;

[0026] Step 8: Control the micro air pump to start, and the micro air pump blows air into the silica gel tube.

[0027] Compared with the prior art, the present invention can realize the use of the iris recognition device in a working environment with relatively large dust, avoid the decline of image quality caused by the accumulation of dust and other substances on the surface of the lens, and ensure the accuracy of recognition. Description of the Drawings

[0028] Figure 1 is the structural schematic diagram of Embodiment 1;

[0029] Figure 2 is Figure 1 the sectional view of;

[0030] Figure 3 is Figure 1 the exploded schematic diagram of, and the connection lines between some components are omitted in this figure.

[0031] The corresponding relationship between each reference numeral and the component name is as follows:

[0032] 1. Outer housing; 2. Iris acquisition device; 3. Filter switching device; 4. Human body sensing device; 5. Micro air pump; 6. Silicone tube; 11. Door body; 12. Display screen; 21. Lens; 22. Image sensor; 23. Infrared lamp; 25. Main control unit; 31. Mounting bracket; 32. Filter slice switcher; 33. Switcher driver; 51. Filter element. Specific embodiments

[0033] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that in the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific situations.

[0035] As Figures 1-3 shown in is Embodiment 1:

[0036] An automatically dust-proof iris acquisition device, which includes: an outer housing 1, an iris acquisition device 2, a filter switching device 3, a human body sensing device 4, a micro air pump 5 and a silicone tube 6.

[0037] The surface of the outer housing 1 is provided with a door body 11 and a display screen 12. The iris acquisition device 2, the filter switching device 3, and the human body sensing device 4 are respectively installed inside the outer housing 1; the iris acquisition device 2 includes a lens 21, an image sensor 22, an infrared lamp 23, and a main control unit 25; here, the iris acquisition device 2 adopts a G-M1 type iris acquisition device, and its structure is well-known and will not be elaborated here. The filter switching device 3 includes a mounting frame 31, a filter sheet switch 32, and a switch driver 33.

[0038] Among them, the display screen 12 adopts a touch display screen 12; the display screen 12 is electrically connected to the image sensor 22 and is used to display the iris recognition result. The display screen 12 is also integrated with a voice module, and the voice module is used to play a pre-stored voice file when the display screen 12 is working. The main control unit 25 is used to control the opening / closing of the iris acquisition device 2; the lens 21 is arranged facing the door body 11; the mounting frame 31 is provided with a filter position, and the filter position is located between the lens 21 and the door body 11; the filter sheet switch 32 is movably connected to the mounting frame 31, and a first filter sheet and a second filter sheet are provided thereon; the switch driver 33 is electrically connected to the filter sheet switch 32 and is used to alternately switch and move the first filter sheet and the second filter sheet to the filter position; and when the first filter sheet or the second filter sheet moves to the filter position, it seals the inner and outer sides of the door body on the outer housing, thereby preventing dust from the outside from entering the inside of the outer housing; the human body sensing device 4 is electrically connected to the switch driver 33 and the main control unit 25 respectively, and is used to control the switch driver 33 and the main control unit 25 to start working when a human body enters its sensing range; one end of the silica gel tube 6 is connected to the micro air pump 5 and the other end is arranged facing the filter position. A detachable filter element 51 is installed at the air inlet of the micro air pump 5.

[0039] In this example: the human body sensing device 4 adopts a pyroelectric infrared sensor for human body. The switch driver 33 adopts a circuit board including an MS3111S driving chip. The filter sheet switch 32 adopts a QM203-M00-41-647AR22 switch.

[0040] In practice, its working process is as follows:

[0041] Step 1: Under normal conditions, the first filter sheet on the filter sheet switch 32 is located at the filter position, blocking the dust from the outside of the outer housing 1 from reaching and contaminating the lens 21. At the same time, the human body sensing device 4 is in an always-on state;

[0042] Step 2: When the human body sensing device 4 senses that a human body enters its sensing range, the human body sensing device 4 outputs a start signal to the switch driver 33 and the main control unit 25;

[0043] Step 3: The switch driver 33 controls the filter switch 32 to switch the second filter to the filtering station, and at the same time, the main control unit 25 controls the iris acquisition device 2 to start working;

[0044] Step 4: The iris acquisition device 2 acquires the iris image of the human eye and outputs the iris recognition result to the display screen 12;

[0045] Step 5: The display screen 12 displays the iris recognition result, and at the same time, the voice module plays the pre-stored voice file;

[0046] Step 6: When the human body sensing device 4 senses that the human body leaves its sensing range, the human body sensing device 4 outputs a shutdown signal to the switch driver 33 and the main control unit 25;

[0047] Step 7: The switch driver 33 controls the filter switch 32 to switch the first filter to the filtering station, and at the same time, the main control unit 25 controls the iris acquisition device 2 to stop working;

[0048] Step 8: Control the micro air pump 5 to start, and the micro air pump 5 blows air into the silica gel tube 6. This air flow reaches the surface of the first filter through the silica gel tube 6 and blows away the dust adhering to the surface of the filter 24.

[0049] The device of this solution only starts to work when the human body is close, and is usually well protected inside the outer housing 1 to avoid contact with dust in the external environment. When the human body leaves the detection range, by controlling the micro air pump 5 to blow air on the first filter, the air in the space between the lens surface and the door body can continue to be kept clean.

[0050] Considering that the filter switch 32 may cause dust accumulation after running in a dusty environment for a long time, resulting in jamming when the first / second filter is switched and moved, it is necessary to regularly disassemble and maintain this component to ensure its service life in a harsh environment: Loosen the locking screw on the filter switch 32 from the front of the device, pull out the screwed-out screw to remove the filter switch 32 with accumulated dust, and separate it from the corresponding connection socket, so as to take out the filter switch 32; Replace the removed filter switch 32 with a new filter switch 32, connect it to the corresponding connection socket, and tuck the connecting wire into the outer housing. Fix and tighten with the locking screw and then conduct a test. After the test passes, the disassembly and maintenance of the filter switch 32 are completed.

[0051] The replacement and maintenance process of the micro air pump 5 is as follows: Pull out the silica gel tube 6 from the air outlet of the micro air pump 5, and disconnect the electrical control wire between the micro air pump 5 and the controller 3; Replace the micro air pump 5 with the same specification and model, reconnect the electrical control wire and conduct a working test on the micro air pump 5. After the test passes, the disassembly and maintenance of the micro air pump 5 are completed.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An iris acquisition device with automatic dust prevention, characterized in that, Including: An outer housing, an iris acquisition device, a filter switching device, and a human body sensing device; A door body and a display screen are provided on the surface of the outer housing; the iris acquisition device, the filter switching device, and the human body sensing device are respectively installed inside the outer housing; The iris acquisition device includes a lens, an image sensor, an infrared lamp, and a main control unit; the main control unit is used to control the opening / closing of the iris acquisition device; the lens is arranged facing the door body; The filter switching device includes a mounting rack, a filter slice switcher, and a switcher driver; a filter working station is provided on the mounting rack, and the filter working station is located between the lens and the door body; the filter slice switcher is movably connected to the mounting rack, and a first filter slice and a second filter slice are provided thereon; the switcher driver is electrically connected to the filter slice switcher and is used to alternately switch and move the first filter slice and the second filter slice to the filter working station; The human body sensing device is electrically connected to the switcher driver and the main control unit respectively and is used to control the switcher driver and the main control unit to start working when a human body enters its sensing range; The display screen is electrically connected to the main control unit and is used to display the iris recognition result; It further includes: a micro air pump and a silica gel tube; one end of the silica gel tube is connected to the micro air pump, and the other end is arranged facing the filter working station; When a human body is not close to the device, the first filter slice blocks the lens to prevent it from being contaminated with dust. When a human body approaches the device, the clean second filter slice is switched to the filter working station, and at the same time, the iris acquisition device starts to work; It further includes a voice module, and the voice module is electrically connected to the main control unit and is used to play a pre-stored voice file when the display screen is working.

2. The automatically dust-proof iris acquisition device according to claim 1, characterized in that: A detachable filter element is installed at the air inlet of the micro air pump.

3. The automatically dust-proof iris acquisition device according to claim 1, wherein: The display screen adopts a touch display screen.

4. The automatically dust-proof iris acquisition device according to claim 1, wherein: The human body sensing device adopts any one of a radar ranging module and a pyroelectric infrared sensor for human body.

5. The iris acquisition device with automatic dust prevention according to claim 1, characterized in that: The switcher driver includes an MS3111S driving chip.

6. The automatically dust-proof iris acquisition device according to claim 1, characterized in that: The filter slice switcher adopts a QM203-M00-41-647AR22 switcher.

7. An automatic dust-proof iris acquisition method, characterized in that, Including the following steps: Step 1: The human body sensing device works continuously. When it senses that a human body enters its sensing range, it jumps to Step 2. When it senses that a human body leaves its sensing range, it jumps to Step 6; Step 2: The human body sensing device outputs a start signal to the switcher driver and the main control unit; Step 3: The switcher driver controls the filter slice switcher to switch and move the second filter slice to the filter working station, and at the same time, the main control unit controls the iris acquisition device to start working; Step 4: The iris acquisition device acquires the iris image of the human eye and outputs the iris recognition result to the display screen; Step 5: The display screen displays the iris recognition result, and at the same time, the voice module plays a pre-stored voice file; Step 6: When a human body leaves the sensing range, the human body sensing device outputs a shutdown signal to the switcher driver and the main control unit; Step 7: The switcher driver controls the filter slice switcher to switch and move the first filter slice to the filter working station, and at the same time, the main control unit controls the iris acquisition device to stop working; Step 8: Control the micro air pump to start, and the micro air pump blows air into the silica gel tube.

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