KR102235462B1 - Facial recognition system and method for detecting body temperature and detecting facial movements - Google Patents

Abstract

The present invention relates to a face recognition system and method for measuring body temperature and detecting face movements, which can recognize the movement of a person who is an object and can measure the body temperature with higher resolution by irradiating infrared rays to a suitable body temperature measurement location of the recognized person. The present invention comprises: a camera generating an image signal by capturing the movement of the object; an infrared sensor unit measuring the body temperature of the object according to the movement of the object tracked by the camera; a solenoid unit having one side configured to be connected to the infrared sensor unit and if the movement of the object is tracked, transmitting the movement to the infrared sensor unit to irradiate the infrared rays to the temperature measuring portion of the object; a controller tracking the object detected by the camera, detecting a motion from the movement of the object to determine whether the object is a human and an accessible person, if the detected object is a human, recognizing a face and controlling the solenoid such that the infrared rays, irradiated by the infrared sensor unit, are controlled to be irradiated to the face of the object, and measuring the body temperature of the object as a result of the irradiation to control whether the person can enter according to the measured body temperature; and an alarm and access restriction unit generating an alarm and operating a circuit breaker when the person is determined not to enter by the control unit or when the body temperature measured by the infrared sensor unit is higher than or equal to a preset body temperature, thereby having high accuracy in measuring the body temperature even though being low-priced and at the same time, accurately measuring the body temperature of multiple people when they are of different heights.

Description

Facial recognition system and method for detecting body temperature and detecting facial movements}

The present invention relates to a facial recognition system and method for measuring body temperature and detecting facial movement, and more particularly, by recognizing the motion of a person as an object and irradiating infrared rays to a suitable body temperature measurement location of the recognized person, resulting in more resolution. It relates to a facial recognition system and method for measuring body temperature and detecting facial movements that can measure high body temperature.

In accordance with the recent epidemic of Corona 19, it is necessary to develop a system to distinguish corona infected persons or similar infectious diseases. Fever is used as an important check factor in distinguishing people infected with such a coronavirus. Accordingly, in places where a large number of people are concentrated, such as airports, in order to identify the coronavirus, the infected person is thoroughly identified through a thermal imaging camera, a thermometer, and a paperweight.

In addition, entrances to buildings, institutions, and restaurants are controlled and access is restricted based on body temperature. In particular, in cases where there are many visitors, such as a large building or a government office, a face recognition system and/or a thermal imaging camera system are provided to reinforce control of a large number of visitors.

The thermal imaging camera system that can control and manage multiple accessors has a wide angle of view, so it can control multiple accessors or measure the body temperature of people who become objects in a large area. However, the thermal imaging camera system has a disadvantage in that it is difficult to identify corona-free infected persons with low resolution and high price, so that the body temperature is not very high or the symptoms are minimal, and installation is difficult due to cost and complexity.

On the other hand, infrared temperature sensors are used where body temperature is measured on a small scale. The infrared temperature sensor has the advantage of being widely used because of its high resolution, it can distinguish people infected with low fever and coronavirus. However, since the person controlling the access must directly irradiate infrared rays on the body part of the person and measure the body temperature, in the absence of the person controlling the access, there may be a flaw in the access control, and the ability of the person controlling the access may be affected. Accordingly, there is a problem such as that an error may occur in measuring body temperature.

Korean Patent Publication No. 10-2018-0023198 (2018.03.07.) and'a body temperature measuring device and a body temperature measuring method' are disclosed as a prior art that partially improves this problem.

Such a conventional technique determines whether the user is in a dedicated mode operated by an operation to measure body temperature or one of the interlocked modes operated in conjunction with iris recognition, and if the determined operation mode is a dedicated mode, the user's forehead Infrared light including at least a portion of is received, and if the determined operation mode is an interlocking mode, infrared rays radiated from a second area including a first area including at least a portion of the user's forehead are received, and the body temperature is corrected. If the determined operation mode is a dedicated mode, body temperature is corrected by a correction algorithm for the dedicated mode, and if the determined operation mode is an interlocked mode, the body temperature is corrected by a correction algorithm for an interlocked mode that is distinct from the correction algorithm for the dedicated mode. Thus, a configuration for measuring body temperature is disclosed.

However, the conventional technology discloses a method of compensating the body temperature by configuring a body temperature measuring unit in a terminal such as a smartphone and distinguishing whether it is a dedicated mode or an interlocked mode according to the iris recognized by the iris recognition unit. It only discloses a configuration that corrects body temperature according to the location, but does not irradiate infrared rays at a location that is good for automatically measuring body temperature, and when the height is different, the configuration that automatically irradiates infrared rays on the face of the recognized object is disclosed. I'm not doing it. In other words, although the conventional technology uses the iris recognition (facial recognition), the iris recognition is used as a means for body temperature correction, so it has the advantage of being able to measure body temperature using a terminal, but recognizes when the height is different. There is a problem in that body temperatures for multiple objects cannot be actively measured if the object does not position the face in an accurate position.

Republic of Korea Patent Publication No. 10-2018-0023198 (2018.03.07.). 'Body temperature measuring device and method of measuring body temperature'

The present invention was invented to solve the above-described problems, and an object of the present invention is to measure body temperature with higher resolution by recognizing the face of a person as an object and irradiating infrared rays to the recognized person. It is to provide a facial recognition system and method for detecting motion.

Another object of the present invention is to drive an infrared sensor to recognize the motion of a person who becomes an object, to distinguish it from a similar human such as a mannequin or a portrait photo, and to irradiate infrared rays to a suitable body temperature measurement location according to the motion of the separated object. It is to provide a facial recognition system and method that can measure body temperature and detect facial movements.

Another object of the present invention is to measure a person's body temperature more quickly or more accurately by measuring one or three points on the forehead, which is a part of measuring the body temperature of a person to be an object, depending on the mode setting. It is to provide a facial recognition system and method.

The problem to be solved of the present invention is not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A facial recognition system for measuring body temperature and detecting facial movements of the present invention for achieving the above object includes: a camera for generating an image signal by capturing movement of an object; An infrared sensor unit that measures the body temperature of the object according to the movement of the object tracked by the camera; One side is configured by being connected to the infrared sensor unit, and when the movement of the object is tracked, the solenoid unit transmits the movement to the infrared sensor unit to irradiate infrared rays to the temperature measurement part of the object; The object detected by the camera is tracked and motion is detected from the movement of the object to determine whether the object is a person and whether or not the object is accessible, and if the detected object is a person, the solenoid unit is controlled by recognizing the face. A control unit that controls the infrared light irradiated by the infrared sensor unit to irradiate the face of the object, measures the body temperature of the object as a result of the irradiation, and controls whether to enter or exit according to the measured body temperature; And an alarm and an access restriction unit for generating an alarm and operating a circuit breaker when the access is not permitted by the control unit or when the body temperature measured by the infrared sensor unit is higher than a preset body temperature.

The control unit may include a motion detector configured to recognize an object from an image signal received from the camera and to determine whether the object is a person by detecting a motion from the motion of the recognized object; If the motion detection unit determines that the object is a human, the motion recognizes the face of the object, determines whether the object is an accessible object from the recognized face, and if the object is an accessible object, the recognized A facial recognition unit that detects the forehead in the face; A solenoid control unit configured to set information on infrared direction coordinates of the solenoid unit so that infrared rays of the infrared sensor unit are irradiated to the forehead of the object detected by the face recognition unit; And a calculation unit that determines the body temperature of the object from the body temperature of the object measured by the infrared sensor unit.

The solenoid unit may include a solenoid array configured to vary magnetic poles and magnetic forces in a vertical arrangement and a horizontal arrangement in an arc shape; A solenoid driving unit configured to receive information on infrared directional coordinates from the solenoid control unit and vary the magnetic pole and magnetic force of the solenoid array to correspond to the infrared directional coordinates so that the permanent magnet is moved to a corresponding position; A permanent magnet configured on the front surface of the solenoid array, disposed with a predetermined gap from the solenoid array, and driven by a solenoid array variable by the solenoid driver; A rear driving shaft configured to be connected to the permanent magnet and driven according to the movement of the permanent magnet; A fixed shaft connected to the other side of the rear driving shaft, having a ball bearing therein so as to be able to rotate while being fixed around the shaft, and transmitting the power of the rear driving shaft; And a light bulb coaxial that is connected in a straight line with the rear driving shaft on one side of the fixed shaft to receive power transmitted from the fixed shaft, and the infrared sensor unit connected to the other side is driven up, down, left, and right to direct it to correspond to the infrared directional coordinates. Can be configured.

In the solenoid arrangement, the vertical arrangement comprises 10 electromagnets in an arc shape, and the infrared sensor unit is configured to move 30 degrees up and down by 3 degrees for each solenoid, and the horizontal arrangement comprises three electromagnets in an arc shape. By configuring, the infrared sensor unit may be configured to move in the horizontal direction by 9 degrees by 3 degrees for each solenoid.

The infrared sensor unit divides the setting mode into three modes: a fast measurement mode, a precision measurement mode, and an average measurement mode, and in the fast measurement mode, measures the measured body temperature at one point of the object forehead, and the precision measurement mode And in the average measurement mode, the forehead of the object may be divided into three to measure the temperature of each of the three parts.

In the fast measurement mode, the calculation unit determines the body temperature measured in response to one point on the object's forehead as the body temperature, and in the precision measurement mode, the highest temperature value among the three points on the object's forehead is determined as the body temperature. In the average measurement mode, the average of the temperatures measured at three points on the object's forehead may be calculated, and the resulting average value may be determined as the body temperature.

A facial recognition method for measuring body temperature and detecting facial movements of the present invention for achieving the above-described object comprises the steps of: detecting movement of an object from image information input from a camera; A first detection step of detecting motion from the movement of the object; A first determination step of determining whether the object is a person from the operation of the object; A second detection step of detecting a face of the object when the detected object is a human being determined in the first determination step; A second determination step of determining whether the face of the object detected in the second detection step is an access denier; Judging in the second determination step, generating an alarm when the face of the object is a denial of access and rejecting the access of the visitor; Controlling to irradiate infrared rays to the face of the object from an infrared sensor unit measuring body temperature; Measuring the body temperature of the object; And generating an alarm when the measured body temperature is greater than or equal to a preset body temperature and denying access to the person.

The measuring of the body temperature of the object may include: a third determination step of determining whether a setting mode of the infrared sensor unit measuring body temperature is set to one of a fast measurement mode, a precision measurement mode, and an average measurement mode; If it is determined in the third determination step that the infrared sensor unit is set to the fast measurement mode, determining a body temperature measured at a point on the object's forehead as the body temperature; If it is determined in the third determination step that the infrared sensor unit is set to the precise measurement mode, determining the highest temperature value among the temperatures measured at three points of the object forehead as the body temperature; And when it is determined in the third determination step that the infrared sensor unit is set to the average measurement mode, calculating an average value of the temperature measured at three points of the object forehead and determining the resulting average value as the body temperature. Can be configured.

According to the present invention, the facial recognition system and method for measuring body temperature and detecting facial movements are inexpensive, but they have high accuracy in measuring body temperature, and at the same time, there is an effect of accurately measuring the body temperature of a plurality of people with different heights.

In addition, the facial recognition system and method for measuring body temperature and detecting facial movement of the present invention can sequentially measure body temperature even when the person whose height is different from the infrared sensor, so that it can be installed inexpensively in a crowded place. It works.

In addition, the facial recognition system and method for measuring body temperature and detecting facial movement of the present invention can accurately detect a person's image and measure body temperature even if the heights are different. It has the effect of increasing the level of security by restricting the access of visitors or those with a body temperature higher than a preset body temperature, and also prevents the access of suspected infectious diseases to densely populated places.

In addition, the facial recognition system and method for measuring body temperature and detecting facial movements according to the present invention enable setting of one of a fast measurement mode, a precision measurement mode, and an average measurement mode when measuring the body temperature of an object according to the mode setting. It has the effect of being able to measure body temperature quickly, precisely, or at an average value.

The effects of the present invention are not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a block diagram showing the configuration of a facial recognition system for measuring body temperature and detecting facial movements according to an embodiment of the present invention.
Figure 2 is a block diagram showing the configuration of the solenoid unit of Figure 1 according to an embodiment of the present invention.
3 is a view showing the configuration of the solenoid unit and the infrared sensor unit of Fig. 1 according to an embodiment of the present invention.
4 is a view showing an arrangement of the solenoid unit of FIG. 1 according to an embodiment of the present invention.
Figure 5 is a perspective view showing the arrangement of the solenoid portion of Figure 1 according to an embodiment of the present invention.
6 is a flow chart showing a process of measuring body temperature using facial recognition and an infrared temperature sensor according to an embodiment of the present invention.
7 is a flow chart showing a process of measuring body temperature of FIG. 5 according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram showing a schematic configuration of a body temperature measurement system using facial recognition and an infrared temperature sensor according to an embodiment of the present invention.

Referring to FIG. 1, the present invention includes a camera 100, an infrared sensor unit 200, a solenoid unit 300, a control unit 400, and an alarm and access limit unit 500.

First, the camera 100 captures the motion of an object. The camera 100 may be installed on an entrance door or the like, and may acquire an image of a person who enters or an object captured by the angle of view.

The infrared sensor unit 200 measures the body temperature of the object 10 according to the movement of the object. In particular, the direction in which the infrared sensor unit 200 is directed is changed by the solenoid unit 300 that is driven under the control of the control unit 400. The infrared sensor unit 200 is controlled by the controller 400 to irradiate an infrared ray toward the face of a person, particularly the forehead, among objects in the image acquired by the camera 100.

The body temperature measured by the infrared sensor unit 200 measures the amount of light to the target area of the object 10, converts it into a current having a corresponding value, and converts it to a body temperature value to determine body temperature. A description of a more detailed process of measuring body temperature using the infrared sensor unit 200 is a technique well known to those skilled in the art, and thus will be omitted.

The infrared sensor unit 200 measures body temperature by irradiating infrared rays on the object 10 to be measured. The area of the object 10 irradiated by the infrared sensor unit 200 may be one point on the forehead or three points each divided into three portions by dividing the forehead of the object 10 into three. The infrared sensor unit 200 irradiates infrared rays at three points divided into three parts of the forehead to increase the accuracy of body temperature measurement. The configuration of irradiating infrared rays to one or three places and processing them will be described in more detail through the description of the controller 400 to be described later.

The infrared sensor unit 200 operates in conjunction with the solenoid unit 300. The solenoid unit 300 tracks the movement of the object 10 and transmits the movement to the infrared sensor unit 200 so that infrared rays can be irradiated to the temperature measurement point of the object. The configuration of the solenoid unit 300 will be described in more detail with reference to FIGS. 2 to 4 to be described later.

The controller 400 tracks the object 10 from the image input from the camera 100, detects motion from the movement of the object 10, and determines whether the object 10 is an accessible object.

If the object 10 is a person, the controller 400 performs facial recognition of the object and determines whether the person corresponding to the face recognized as a result of the process is a person who is denied access or a person who is not permitted access. Here, a person who is denied access is a person who has restricted access to a place where multiple people are allowed to enter, and a person who is not allowed access is a person other than a person who is permitted to enter a place where only those who have been granted access can enter. Refers to a person. However, for convenience of explanation, those who are denied access and those who are not permitted to enter will be collectively referred to as those who are not permitted to enter, and those who can enter will be collectively referred to as those who are permitted to enter.

The control unit 400 may restrict access through the alarm and access restriction unit 500 when the object is not allowed to enter. The control unit 400 may include facial information of an accessible person. The controller 400 may search for facial information recognized from the facial information of the accessible person and restrict access through the alarm and access limiter 500 when the facial recognized person is not in the facial information of the accessible person. Alternatively, the control unit 400 may search for facial information recognized from the facial information of the person without access, and restrict access through the alarm and access restriction unit 500 when the person with the facial recognition is in the facial information of the person without access. .

The control unit 400 searches for facial information recognized from the facial information of the person with access to, and if the person with facial recognition is in the facial information of the person with access to, or by searching for facial information recognized in the facial information of the person without access, If the recognized person is not in the person's facial information, access can be allowed. That is, when the object whose movement is detected through the camera 100 is a person, the control unit 400 recognizes the face and controls the alarm and access limiter 500 so that only the permitted person can enter and exit.

When the detected object 10 is a human, the control unit 400 recognizes the face and controls the solenoid unit 300 so that the infrared rays irradiated by the infrared sensor unit 200 are measured at the body temperature of the face of the object 10. , For example, the forehead is controlled to be irradiated and the body temperature of the object is measured as a result of the irradiation.

The controller 400 may determine the highest temperature among the temperatures measured at three points measured according to the setting as the body temperature, or may determine an average of the temperatures measured at three points as the body temperature. Specifically, the control unit 400 may measure body temperature differently according to the setting mode divided into three modes of the infrared sensor unit 200 in a fast measurement mode, a precision measurement mode, and an average measurement mode. In the case of the fast measurement mode, the controller 400 measures the body temperature of a point on the forehead of the object 10 as described above and determines the body temperature as the body temperature. In the case of the precision measurement mode, the controller 400 increases the exposure of the camera 100 to increase the sensitivity of the sensor, and as described above, the control unit 400 measures the temperature of three points on the forehead of the object 10 to determine the highest temperature among them as body temperature. do. In the average measurement mode, the controller 400 measures the temperature of three points on the forehead of the object 10 as described above, and determines the average of the measured temperatures as body temperature.

As described above, the alarm and access limiting unit 500 generates an alarm when it is determined that access is not permitted under the control of the control unit 400 or when it is determined that the body temperature is higher than a preset body temperature as a result of measuring the body temperature. The alarm and access restriction unit 500 generates an alarm and, at the same time, generates an alarm in an area in which the operator resides, so that access may be restricted if a person is not authorized by the operator or a person whose body temperature is higher than the reference value. In addition, when an alarm occurs, the alarm and access limiting unit 500 may operate a circuit breaker (not shown) installed at the door to prevent unauthorized persons and persons with a body temperature higher than a reference value from entering.

Meanwhile, the control unit 400 of the present invention includes a motion detection unit 410, a face recognition unit 420, a solenoid control unit 430, and a calculation unit 440.

When the motion detection unit 410 recognizes that the motion of the object 10 is detected by the camera 100, the motion detection unit 410 detects the motion from the motion of the object 10 and determines whether the object 10 is a person. The motion detection unit 410 determines whether the facial muscles or the entire body are moved in a cylindrical body or whether each part is naturally moved by a complex joint, whether it is a real person or a sculpture. For example, if the object 10 detected by the motion detection unit 410 is a mannequin, the motion is re-detected using another person carrying it as the object 10, and whether or not it is entered through the facial recognition 420 to be described later. Can be judged. That is, the motion detection unit 410 may recognize a person by distinguishing it from a mannequin, a doll, a robot, etc. to prevent unnecessary facial recognition and body temperature measurement. For example, mannequins, dolls, and robots may be moved by other means or moving means, but if there is no arbitrary movement of the leg joints, they may be regarded as objects such as mannequins, dolls, and robots, and access may be restricted.

In classifying the object 10, the motion detection unit 410 can separate the movement of the animal to prevent unnecessary body temperature measurement and facial recognition, and also control the entry of animals according to the entry and exit restrictions of animals in the entry rules. have.

When it is determined that the object 10 detected by the motion detection unit 410 is a human, the face recognition unit 420 recognizes the face of the object in the motion. The face recognition unit 420 searches for a face recognized from the face information that is accessible or the face information that is not allowed to enter, and determines whether access is possible. The face recognition unit 420 detects the forehead from the recognized face if the object 10 is an accessible target. The face recognition unit 420 may divide the forehead of the recognized object 10 into three horizontal directions. The fact that the facial recognition unit 420 divides the forehead into three is to increase the accuracy of body temperature measurement because the body temperature of each part may be different when the infrared sensor unit 200 measures body temperature.

The solenoid control unit 430 controls the solenoid unit 300 to irradiate infrared rays to the forehead of the object 10 detected by the face recognition unit 420.

The solenoid control unit 430 recognizes the orientation position of the infrared sensor unit 200 and calculates the magnetic force and stimulus corresponding thereto, and transmits the calculated magnetic force and stimulus information to the solenoid unit 300. The solenoid unit 300 changes the magnetic force and magnetic force of the solenoid in response to the magnetic force and stimulation information so that the infrared sensor unit 200 is driven in response to direct infrared rays to one or three points of the forehead of the object 10. Take your body temperature.

The calculation unit 440 calculates the body temperature of the object 10 irradiated with infrared rays to the forehead of the object 10 through the infrared sensor unit 200. The calculation unit 440 calculates the information measured by the infrared sensor unit 200 and transmitted as a current as a body temperature corresponding to the current amount according to the information according to the current amount. The calculation unit 440 may calculate body temperature according to three modes: a fast measurement mode, a precision measurement mode, and an average measurement mode.

As described above, in the fast measurement mode, the calculation unit 440 measures a body temperature corresponding to a point on the forehead of the object 10 and determines the body temperature as the body temperature. In the case of the precise measurement mode, the calculation unit 440 measures the temperature of three points on the forehead of the object 10 in a state in which the sensitivity is increased by increasing the exposure of the camera 100 and determines the highest temperature as the body temperature. In the case of the average measurement mode, the calculation unit 440 measures the temperature at three points on the forehead of the object 10, calculates an average of the measured temperatures, and determines the average temperature value obtained as a result of the body temperature.

FIG. 2 is a block diagram showing the configuration of the solenoid unit of FIG. 1 according to an embodiment of the present invention, and FIG. 3 is a schematic view showing the configuration of the solenoid unit and the infrared sensor unit of FIG. 1 according to an embodiment of the present invention. 4 is a view showing the arrangement of the solenoid unit of Fig. 1 according to an embodiment of the present invention, and Fig. 5 is a perspective view showing the arrangement of the solenoid unit of Fig. 1 according to an embodiment of the present invention.

2 to 5, the solenoid unit 300 of the present invention includes a solenoid arrangement 310, a solenoid driving unit 320, a permanent magnet 330, a rear driving shaft 340, a fixed shaft 350, and a full coaxial It consists of 360, including.

First, the solenoid array 310 is composed of an arc-shaped horizontal array 314, similar to the vertical array 312 configured in an arc shape. The solenoid array 310 has a variable magnetic force and magnetic pole by the solenoid driving unit 320. That is, each solenoid array 310 is a variable electromagnet driven by the solenoid driver 320.

According to an embodiment of the present invention, in the solenoid arrangement 310, ten solenoids 312 are arranged vertically, and three solenoids 314 are arranged horizontally. That is, in the vertical arrangement 312 of the solenoid arrangement 310, 10 arc-shaped solenoids are arranged per row. In the horizontal arrangement 314, three arc-shaped solenoids are arranged per column. Accordingly, a total of 30 solenoids may be arranged in the solenoid arrangement 310. The vertical arrangement 312 constitutes 10 solenoids, and the infrared sensor unit 200 for each solenoid can be moved by 3 degrees so that a total of 30 degrees can be moved. The horizontal arrangement 314 may constitute three solenoids and may be configured to move 9 degrees by allowing the infrared sensor unit 200 to move by 3 degrees per solenoid. Accordingly, the infrared sensor unit 200 may move 30 degrees up and down and 9 degrees left and right. However, the above-described solenoid arrangement 310 is only one embodiment, and vertical and horizontal movement widths may be expanded or reduced according to installation conditions.

The solenoid driving unit 320 is controlled by the solenoid control unit 430 to vary the magnetic pole and magnetic force of the solenoid array 310 so that the permanent magnet 330 moves vertically and horizontally. That is, the solenoid control unit 430 recognizes the orientation and arrangement position of the infrared sensor unit 200, calculates the magnetic force and stimulus corresponding thereto, and transmits the calculated magnetic force and stimulus information to the solenoid driving unit 320. The solenoid driving unit 320 allows the magnetic force and magnetic force of the solenoid array 310 to vary in response to the magnetic force and magnetic force information, and the permanent magnet 330 configured adjacent thereto is driven.

When the permanent magnet 330 is driven, the infrared sensor unit 200 moves vertically and horizontally through the post-driving shaft 340, the fixed shaft 350, and the electric bulb coaxial shaft 360 connected thereto. The infrared sensor unit 200 may be moved to a position controlled by the solenoid control unit 430 to measure body temperature by irradiating infrared rays toward a body temperature measurement point of the object 10, for example, the forehead of the object 10.

The permanent magnet 330 is configured on the front surface of the solenoid array 310 and is configured to be disposed with the solenoid array 310 with a predetermined gap. Preferably, the N pole of the permanent magnet 330 is disposed on the side adjacent to the solenoid array 310. The permanent magnet 330 is configured by selecting a magnet having a magnetic force selected from 1 Gauss to 50 Gauss. At this time, if the magnetic force of the permanent magnet 330 is low, the magnetic force varies over time, so position control may be difficult. Therefore, the device of the present invention is preferably among the magnets maintaining a constant magnetic force of about 5 Gauss to 30 Gauss. It is configured by selecting a suitable permanent magnet 330 according to the installed size.

The permanent magnet 330 is arranged with a solenoid array 310 having an arc shape and a gap of 1 mm to 5 mm, and as the magnetic force and magnetic pole of the solenoid array 310 are varied by the solenoid driving unit 320, a solenoid array in the form of an arc. It is configured to move vertically and horizontally around the fixed shaft 350 while maintaining a constant gap with the 310.

One side of the rear drive shaft 340 is connected to the permanent magnet 330 and the other side is connected to the fixed shaft 350. The rear driving shaft 340 is connected to the permanent magnet 330 and moves vertically and horizontally around the fixed shaft 350 according to the movement of the permanent magnet 330.

One side of the fixed shaft 350 is connected to the other side of the rear driving shaft 340, and the other side of the fixed shaft 350 is connected to one side of the electric bulb coaxial shaft 360. The fixed shaft 350 is configured with a ball bearing therein so as to be able to rotate in a fixed state. The fixed shaft 350 transmits the power received from the rear driving shaft 340 to the electric bulb coaxial shaft 360.

One side of the bulb coaxial 360 is connected to the other side of the fixed shaft 350 and the other side of the bulb coaxial 360 is connected to the infrared sensor unit 200. The bulb coaxial 360 is connected to the fixed shaft 350 and the rear driving shaft 340 in a straight line to receive the power transmitted from the fixed shaft 350 so that the infrared sensor unit 200 connected to the other side is driven vertically and horizontally. .

6 is a flowchart illustrating a process of measuring body temperature using facial recognition and an infrared temperature sensor according to an embodiment of the present invention.

Referring to FIG. 6, first, in step S202, the controller 400 detects a motion of an object from image information input from the camera 100. Here, the information input from the camera 100 is image information in which the camera 100 photographs the object 10.

In step S204, the controller 400 detects the motion of the object 10 from the image information. In this case, when the area in which the camera 100 photographs is a narrow area such as an entrance door, the object 10 may be designated in the order of the object 10 close to the image information to detect the motion. Alternatively, in the case of a large area in which the camera 100 is photographed, the object 10 is designated by the operator controlling the image detected by the camera 100 or automatically in the order of the nearby objects 10 as described above. It can be selected from those designated as.

In step S206, the control unit 400 determines whether the object 10 is a person from the operation of the object 10. Here, the determination of whether or not a person is a person can be distinguished by detecting the shaking of the head left and right, winking, blinking of the eyes, shaking of the facial muscles, and changes in the shape of the mouth and the mouth.

If it is determined in step S206 that the detected object 10 is a person, the control unit 400 detects the face of the object 10 (step S208).

It is determined whether or not the face of the object 10 detected in step S208 is inaccessible (step S210).

If it is determined in step S210 that the result of facial recognition is determined to be the person not allowed to enter, the control unit 400 causes the alarm and access limiting unit 500 to generate an alarm and denies the entry of the person (step S212). As described above, as described above, the operator may directly deny access at the site according to the alarm, or a circuit breaker (not shown) may be operated by the alarm and access restriction unit 500 to deny entry.

If it is determined in step S210 that the person is not allowed to enter as a result of facial recognition, that is, the person is allowed to enter, the control unit 400 controls the infrared sensor unit 200 that measures body temperature to detect the detected in the second detection step. Infrared rays are irradiated to the face of the object 10 (step S214).

In step S216, the control unit 400 measures the body temperature of the object 10. The body temperature of the object 10 is calculated by measuring photons for one point or multiple points of the object 10 irradiated by the infrared sensor unit 200, and converting the measured photons into a current value. do.

In step S218, the control unit 400 determines whether the measured body temperature is equal to or higher than a preset body temperature. Here, the preset body temperature may be 37.5 degrees.

If the body temperature measured as a result of the determination in step S218 is equal to or higher than the preset body temperature, the control unit 400 controls the alarm and access limiting unit 500 to generate an alarm or shut down a blocker to deny access to the object (step S220). ).

Meanwhile, if the detected object 10 is not a person as determined in step S206, access to the object is restricted (S222).

7 is a flow chart showing a process of measuring body temperature of FIG. 6 according to an embodiment of the present invention.

Referring to FIG. 7, the control unit 400 determines whether the setting mode of the infrared sensor unit 200 for measuring body temperature is set to any of a fast measurement mode, a precision measurement mode, and an average measurement mode (S302). step).

If it is determined in step S302 that the infrared sensor unit 200 is set to the fast measurement mode, the body temperature of one point on the forehead of the object 10 is measured to determine the body temperature (step S304).

If it is determined in step S302 that the infrared sensor unit 200 is set to the precise measurement mode, the temperature of three points on the forehead of the object is measured and the highest temperature value is determined as the body temperature (step S306).

If it is determined in step S302 that the infrared sensor unit 200 is set to the average measurement mode, the temperature of the three points of the object forehead is measured, the average of the measured temperatures is calculated, and the resulting average temperature value is determined as the body temperature. Do (S308 step).

What has been described above is merely an embodiment for implementing a facial recognition system and method for measuring body temperature and detecting facial movements according to the present invention, and the present invention is not limited to the above-described embodiment, but is claimed in the claims below. As described above, without departing from the gist of the present invention, anyone of ordinary skill in the field to which the present invention pertains will have the technical spirit of the present invention to the extent that various changes can be implemented.

100: camera 200: infrared sensor unit
300: solenoid unit 310: solenoid arrangement
320: solenoid drive unit 330: permanent magnet
340: rear drive shaft 350: fixed shaft
360: bulb coaxial 400: control unit
410: motion detection unit 420: face recognition unit
430: solenoid control unit 440: calculation unit
500: Alarm and access restriction

Claims (8)

A camera that generates an image signal by capturing motion of an object;
An infrared sensor unit that measures the body temperature of the object according to the movement of the object tracked by the camera;
One side is configured by being connected to the infrared sensor unit, and when the movement of the object is tracked, the solenoid unit transmits the movement to the infrared sensor unit to irradiate infrared rays to the temperature measurement part of the object;
The object detected by the camera is tracked, and motion is detected from the movement of the object to determine whether the object is a person and whether or not the object is accessible. A control unit that controls the infrared light irradiated by the infrared sensor unit to irradiate the face of the object, measures the body temperature of the object as a result of the irradiation, and controls whether to enter or exit according to the measured body temperature; And
An alarm and an access limiter for generating an alarm and operating a circuit breaker when the access is not permitted by the control unit or when the body temperature measured by the infrared sensor unit is higher than a preset body temperature,
The control unit,
A motion detection unit that recognizes an object from the image signal received from the camera and detects a motion from the motion of the recognized object to determine whether the object is a person;
A face recognition unit for recognizing the face of the object in the motion when the motion detection unit determines that the object is a person, and detecting a forehead from the recognized face if the object is accessible from the recognized face;
A solenoid control unit configured to set information on infrared direction coordinates of the solenoid unit so that infrared rays of the infrared sensor unit are irradiated to the forehead of the object detected by the face recognition unit; And
A facial recognition system for measuring body temperature and detecting facial movements, comprising a calculation unit configured to determine the body temperature of the object from the body temperature of the object measured by the infrared sensor unit. delete The method of claim 1, wherein the solenoid part,
A solenoid arrangement in which magnetic poles and magnetic forces in the vertical and horizontal arrangements in an arc shape are variable;
A solenoid driving unit that receives information on infrared directional coordinates from the solenoid control unit and changes the magnetic pole and magnetic force of the solenoid array to correspond to the infrared directional coordinates;
A permanent magnet configured on a front surface of the solenoid array, disposed with a predetermined gap from the solenoid array, driven by the solenoid driver, and moved to a corresponding position of the solenoid array;
A rear driving shaft configured to be connected to the permanent magnet and driven according to the movement of the permanent magnet;
A fixed shaft connected to the other side of the rear drive shaft and having a ball bearing inside so as to be rotatable in a fixed state, and transmitting power of the rear drive shaft; And
It includes a bulb coaxial that is connected in a straight line with the rear drive shaft on one side of the fixed shaft and is driven up, down, left and right to the infrared sensor unit connected to the other side by receiving the power transmitted from the fixed shaft so as to be directed corresponding to the infrared directional coordinate A facial recognition system that measures human body temperature and detects facial movements. The method of claim 3, wherein the solenoid arrangement,
In the vertical arrangement, 10 electromagnets are configured in an arc shape, and the infrared sensor unit is configured to move in a vertical direction of 30 degrees by 3 degrees for each solenoid, and in the horizontal arrangement, three electromagnets are formed in an arc shape, and the infrared sensor A facial recognition system that measures body temperature and detects facial movement, which is configured to move in the left-right direction by 9 degrees by 3 degrees for each solenoid. The method of claim 1, wherein the infrared sensor unit,
The setting mode is divided into three modes: quick measurement mode, precision measurement mode and average measurement mode,
In the case of the quick measurement mode, the measured body temperature at a point on the forehead of the object is measured,
In the case of the precise measurement mode and the average measurement mode, the forehead of an object is divided into 3 parts and the temperature of each of the three parts divided into 3 parts is measured. The method of claim 5, wherein the calculation unit,
In the case of the quick measurement mode, the body temperature measured in correspondence with a point on the forehead of the object is determined as the body temperature,
In the case of the precise measurement mode, the exposure of the camera is increased and the highest temperature value is determined as the body temperature among the temperatures measured at three points on the object's forehead,
In the average measurement mode, a facial recognition system that detects body temperature measurement and facial movement is the method of calculating the average of the temperatures measured at three points on the object's forehead and determining the resulting average value as body temperature. Detecting a motion of an object from image information input from the camera;
A first detection step of detecting motion from the movement of the object;
A first determination step of determining whether the object is a person from the operation of the object;
A second detection step of detecting a face of the object when the detected object is a human being determined in the first determination step;
A second determination step of determining whether the face of the object detected in the second detection step is an access denier;
Judging in the second determination step, generating an alarm when the face of the object is a denial of access and rejecting the access of the visitor;
Controlling to irradiate infrared rays to the face of the object from an infrared sensor unit measuring body temperature;
Measuring the body temperature of the object;
Generating an alarm when the measured body temperature is greater than or equal to a preset body temperature and rejecting entry and exit of the person; And
And restricting access to the object when the detected object is not a human being determined in the first determination step. The method of claim 7, wherein measuring the body temperature of the object,
A third determination step of determining whether a setting mode of the infrared sensor unit measuring body temperature is set to one of a fast measurement mode, a precision measurement mode, and an average measurement mode;
If it is determined in the third determination step that the infrared sensor unit is set to the fast measurement mode, determining a body temperature measured at a point on the object's forehead as the body temperature;
If it is determined in the third determination step that the infrared sensor unit is set to the precise measurement mode, determining the highest temperature value among the temperatures measured at three points of the object forehead as the body temperature; And
If it is determined in the third determination step and when it is determined that the infrared sensor unit is set to the average measurement mode, calculating an average value of the temperatures measured at three points of the object forehead and determining the resulting average value as the body temperature A facial recognition method that measures human body temperature and detects facial movements.

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