KR20120066940A - Elevator crime prevention system - Google Patents

Abstract

PURPOSE: An elevator security system is provided to grasp positions and motions of passengers in an elevator by a sensor matrix installed on a floor or a ceiling of the elevator. CONSTITUTION: An elevator security system comprises a sensor matrix(110), a memory unit(120), and a control unit(130). The sensor matrix is arranged on a floor or a ceiling of an elevator at a constant interval. The memory unit saves the states of each sensor of the sensor matrix. The control unit compares values measured by each sensor of the sensor matrix and a reference value, and determines whether passengers position above or below the sensors in the elevator. In order to grasp the position of the passengers in the elevator, it is saved to the memory unit that the control unit makes the sensors be on if the passengers position above or below the sensors, or if not, the sensors become off.

Description

Elevator Crime Prevention System {Elevator Crime Prevention System}

The present invention relates to an elevator security system, and more particularly, by determining the position and movement of the elevator occupants by a sensor matrix installed on the floor or ceiling of the elevator to determine whether a crime or dangerous situation such as sexual harassment occurs in the elevator. It relates to an elevator security system.

Recently, the frequency of crimes such as sexual harassment of children in elevators is increasing. Many elevator security systems have been proposed to prevent such crimes occurring in elevators. The main technical aspects of elevator security systems are largely divided into the recognition of criminal or dangerous situations such as sexual harassment and violence in the elevator and the follow-up after such situations.

The method of recognizing a dangerous situation includes recognizing a dangerous situation when a high sound occurs, and recognizing a dangerous situation when a vibration or shock is generated that is different from the vibration of normal operation of an elevator. As a follow-up after a dangerous situation, the elevator can be moved to a crowded lobby or the first floor.When an emergency occupant presses the security switch, the elevator is locked and the door of the elevator does not open. It shows how to move the elevator and how to transmit the dangerous situation to the management office, the police department, and security companies. Such methods include Korean Patent Publication No. 194-0021404 (published October 17, 1994), Patent Registration 0346301 (July 15, 2002), Patent Registration 0900116 (May 22, 2009) , Patent Registration No. 0913127 (registered on August 13, 2009), Patent Publication No. 2010-0089418 (August 12, 2010), Patent Publication No. 2010-0091500 (August 19, 2010), etc. have.

Meanwhile, Korean Patent Publication No. 2006-0022721 (released on March 10, 2006) discloses an object monitoring system for elevator monitoring, which analyzes an abnormal behavior in an elevator based on an image received from a surveillance camera installed in the elevator. To judge the situation. However, this patent application did not give specific details of image analysis. Since images contain a lot of information, it is not easy to develop an algorithm that compares and analyzes several images to find out what characteristic meaning. Up to now, no algorithm has been developed that has a data processing speed as fast as practically applicable to elevator security systems.

Meanwhile, Republic of Korea Utility Model Registration No. 0236993 (registered June 25, 2001) discloses an elevator anti- crime recognition device, which plans to commit crimes and attempts to commit crimes immediately after boarding an elevator. In some cases, a person's heart rate increases and body temperature rises, and the tension caused by the idea of committing a crime prevents them from detecting sound waves that they may not know. To this end, infrared temperature sensor is used to detect the temperature change of the human body, and sound wave sensor is used to detect the sound from unconsciousness. In general, infrared temperature sensors and sound wave sensors are difficult to detect minute changes, and many people do not sigh or have a clear rise in human body temperature just to commit a crime. Therefore, even though the method uses a very precise temperature sensor and sound wave sensor, there is a limit in that there are many errors in its own characteristics. It is very difficult to find the proper means of recognizing such a situation at the thought stage of a crime.

Recognizing the above situation of the prior art, the present inventors are reliable elevator security systems with little error in recognizing a dangerous situation related to crime, and determining whether a dangerous situation has occurred in an elevator by analyzing an infrared thermal image. An elevator security system was filed on November 12, 2010, the patent application No. 10-2010-0112787. The invention of this patent application is a highly reliable system but has the disadvantage of using an expensive infrared thermal camera. Accordingly, the present inventors have tried to develop an elevator security system that is more inexpensive and reliable, and as a result, the present invention has been achieved.

SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator security system that determines whether a crime situation or a dangerous situation such as sexual harassment occurs in an elevator by grasping the position and movement of an elevator occupant by a sensor matrix installed on an elevator floor or ceiling.

Elevator security system of the present invention for achieving the above object is a sensor matrix which is installed on the bottom or ceiling of the elevator in an equal interval array in the form of horizontal and vertical n x n or n x m (3 ≤ n <m) matrix; A memory unit which stores a state of each sensor of the sensor matrix; And a control unit. Herein, the control unit compares the value measured by each sensor of the sensor matrix with a reference value to determine whether the elevator occupant is located above or below the sensor, and when the elevator occupant is positioned above or below the sensor. The sensor state is turned on, and if not, the sensor state is turned off to be stored in the memory to determine the position of the elevator occupant.

Preferably, the control unit recognizes the independent areas of the sensors that are distinguished from each other in correspondence with the position of each occupant from the on state of the sensors, and more preferably, the independent areas of the sensors are for one passenger. It is determined by the controller in comparison with the shape of the region of the sensors to be turned on, and furthermore, the controller tracks the movement or deformation of the independent region of the sensors, so that the independent region is excessively irregular movement above the reference value or In case of shaking, it is regarded as a dangerous situation.

In addition, the controller may determine that it is a dangerous situation when the independent area of the sensors contacts the independent area of other sensors during the excessive irregular movement or shaking.

The elevator security system may further include a microphone, and the controller may determine whether the voice signal received by the microphone has a strength greater than or equal to a reference value, and in such a case, determine that it is a dangerous situation.

The sensor matrix is installed on the elevator floor to detect the weight of the occupant, the infrared sensor installed on the elevator ceiling to detect infrared radiation emitted by the occupant, and the elevator is installed on the ceiling to emit infrared radiation downwards It is preferable that it is comprised with the sensor chosen from the group which consists of an infrared sensor which receives the infrared ray which the emitted infrared ray reflected and returned.

On the other hand, the elevator security system further includes a surveillance camera for photographing the inside of the elevator, and a risk situation notification and help request computer device is installed in a place frequented by people outside the elevator, the risk situation notification and help request The computer device may receive and display a moving picture of a dangerous situation captured by the surveillance camera, and may issue a warning indicating a dangerous situation to request help from those passing by the place.

The control unit also notifies the victim of the crime through a speaker installed in the elevator, if the current situation is actually a dangerous situation, a notification message for shocking the elevator or a notification message for screaming, and the reference value applied to the elevator by the victim. When the above shock or scream is sensed, it may be to inject a lethargic material to neutralize the person in the elevator.

Since the elevator security system of the present invention determines whether a dangerous situation has occurred in the elevator by detecting the position and movement of the elevator occupant by a sensor matrix installed on the floor or ceiling of the elevator or by combining it with other means known in the art. It is possible to carry out the risk recognition procedure at high processing speed, and the result is reliable because there are few errors in the result, and the cost of the system is useful.

1 is a schematic configuration diagram of an elevator security system according to an embodiment of the present invention.
2 is a state diagram of a sensor matrix used in the elevator security system of the present invention.
3 is another state diagram of a sensor matrix used in the elevator security system of the present invention.
4 is a part of a flowchart relating to the operation of the main part of the elevator security system installed in the elevator.
FIG. 5 is a part of a flowchart relating to the operation of the main part of the elevator security system installed in the elevator following FIG. 4.
6 is a part of a flowchart relating to the operation of the main part of the elevator security system installed in the elevator following FIG.
FIG. 7 is a part of a flowchart relating to the operation of the main part of the elevator security system installed in the elevator following FIG. 6.
8 is a flowchart illustrating the operation of the danger situation notification and help request computer device installed outside the elevator.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a schematic configuration diagram of an elevator security system according to an embodiment of the present invention. As shown in FIG. 1, the elevator security system of the present invention includes a main part 100 of an elevator security system installed in an elevator. In addition, the elevator security system of the present invention may optionally include a risk situation notification and help request computer device 200 and the management room 300 is installed outside the elevator.

The main part 100 of the elevator security system includes a sensor matrix 110, a memory unit 120, and a controller 130. The sensor matrix 110 is installed on the floor or ceiling of an elevator in an equal interval arrangement in the form of a horizontal and vertical n x n or n x m matrix. N is a natural number of 3 or more, and m is a natural number larger than n. The upper limit values of n and m are not particularly limited as long as the control section can process them. The values of n and m may be appropriately selected according to the processing speed of the controller. For example, the values of n and m may be in the range of 5 to 100, and usually 10 to 20 in consideration of the accuracy, speed, and economic efficiency of the processing. Will be suitable.

The value measured by each sensor belonging to the sensor matrix 110 is compared with the reference value by the controller 120 to determine whether the elevator occupant is located above or below the sensor, and the elevator occupant is above or below the sensor. When the sensor state is located, the sensor state is turned on, and if not, the sensor state is stored in the memory unit 120. This makes it possible to determine the elevator occupant's location.

The controller 130 recognizes the independent areas of the sensors that are distinguished from each other in correspondence with the position of each occupant from the on state of the sensors in order to determine the position of the elevator occupant. The independent area is determined by the controller 130 in comparison with the shape of the area of the sensors to be turned on for each occupant. In addition, the controller 130 may track movement and deformation of the independent regions of the sensors, and may determine that a dangerous situation occurs in the elevator when the independent region exhibits excessive movement or shaking above the reference value. In addition, the controller 130 determines that the sensor is in a dangerous situation when the independent area of the sensors contacts the independent area of other sensors during excessive irregular movement or shaking.

The sensor matrix 110 is a weight sensor installed on the elevator floor to detect the weight of the occupant, an infrared heat sensor installed on the ceiling of the elevator to detect infrared rays emitted by the occupant, and a ceiling mounted on the elevator to emit infrared light downward. It may be composed of a sensor selected from the group consisting of an infrared sensor after receiving the emitted infrared light is reflected and returned.

The main part 100 of the elevator security system according to the present invention also includes a microphone 140, surveillance camera 150, speaker 160, display 170 and communication unit 180.

The microphone 140 is for transmitting the voice of the situation occurring in the elevator to the controller 130. The voice transmitted to the controller 130 is stored in the memory 120 together with the state information of the sensor matrix.

The surveillance camera 150 captures a general image or video, and the captured image is received by the controller 130 and stored together with the sensor matrix state information and the voice in the memory 120.

The speaker 160 is used to broadcast warnings and the like in the elevator by the controller 130. The display 170 is typically installed in an elevator to display advertisements and the like. If necessary, the display 170 may be used to display that a dangerous situation is known outside the elevator when a dangerous situation occurs. In addition, the communication unit 180 is a means for communicating with the computer device 200, the management room 300, and other police stations, security centers, etc. installed in the elevator outside the image taken in the elevator, a wired or wireless communication means Can be.

Elevator security system of the present invention, the elevator security system of the present invention may optionally include a risk situation notification and help request computer device 200 is installed outside the elevator, the computer device 200 is a human The control unit 130 is installed in a frequent place, the control unit 130 receives the image captured by the surveillance camera 150 in the main unit 100 and the voice received by the microphone 140 when a dangerous situation occurs in the elevator It receives and displays the transmission to the computer device 200 through 180 and broadcasts a notification that a dangerous situation has occurred to request people to pass through the place. The computer device 200 includes a control unit 210, a display 220, a speaker 230, and a communication unit 240 that perform the functions described above.

Communication between the main part 100 of the elevator security system and the computer device 200 may be made directly or through the management room 300. In the figure, the management room 300 is simply shown, but in reality, this also has a hardware configuration similar to that of the computer device 200 as the computer device. However, it is to be understood that the function performed by the controller may vary depending on the installed program.

Next, the operation of the elevator security system of the present invention will be described. 2 is a state diagram of the sensor matrix used in the elevator security system of the present invention, Figure 3 is another state diagram of the sensor matrix used in the elevator security system of the present invention. 4 to 7 are flowcharts of the operation of the main part of the elevator security system installed in the elevator, Figure 8 is a flowchart of the operation of the danger situation notification and help request computer device installed outside the elevator.

As shown in FIGS. 4 to 7, the sensor matrix 110, the surveillance camera 150, and the microphone 140 installed in the elevator transmit the sensor matrix measurement values, the general video, and the audio to the controller 130, respectively. 130 receives this data (step 110).

The measured value generated by the sensor matrix 110 is transmitted to the controller 130 and compared with the reference value to determine whether an elevator occupant is located above or below each sensor belonging to the sensor matrix 110. If the occupant is located above or below, the state of the sensor is set to on, otherwise it is set to off (step 111). The state of each of these sensors is stored in the memory unit 120.

As a specific example, when the sensor matrix is constituted by the weight sensor, the matrix of the weight sensor is installed on the floor of the elevator. When a person boards an elevator, the weight of the occupant causes the sensors in the location area where the occupant stands to be different from the sensors in the other area. For example, the measurement of sensors in other areas is 0 kg pressure per square meter, but the measurement of sensors in the location area where the occupant is standing is 10 kg per square meter. In this case, if the reference value is set to 5 kg per square meter, the sensors are in the on state because the measured values of the sensors in the passenger's location area are larger than the reference value, and the sensors are in the on state. The measured values of these sensors are smaller than the reference value, so the state of the sensors is turned off. Therefore, the position where the occupant stands can be recognized by the area in the on state.

As another example, when the sensor matrix is constituted by an infrared heat sensor that detects infrared rays emitted by the occupant, such infrared heat sensor is installed on the ceiling of the elevator. If no person is in the elevator, no heat is emitted, so there is no heat measured by the infrared heat sensor. At this time, all the sensors belonging to the sensor matrix are in an off state. On the other hand, when a person boards an elevator, infrared radiation is emitted while heat is emitted from the human body. The infrared rays emitted in this way are emitted in all directions but the largest value is measured by the sensor at the closest distance, that is, the sensor located directly above the person. Therefore, all of the measured values of all the sensors are compared and, for example, the state of the sensors that have the smallest value as a reference value and the state of the sensors having a measured value greater than or equal to the reference value on is turned on. Can be set to off. Alternatively, a material may be formed in front of the light receiving area of the infrared heat sensor and absorb infrared light on the side of the guide so that the infrared light received for heat detection is received only by sensors installed directly above the occupant. For example, infrared rays that do not go straight by applying a black material may be absorbed by the absorbing material. As a result, infrared detection above a predetermined value is made only by sensors located directly above the occupant, so that only those sensors are turned on and the remaining sensors are turned off.

As another example, when the sensor matrix is constituted by an infrared sensor that emits infrared light and then receives reflected infrared light, such infrared sensor is installed on the ceiling of the elevator. The infrared light is emitted downward by the infrared sensor, and if there is a passenger, the infrared light is reflected at a close position and returns to the light receiving part of the infrared sensor. Therefore, the intensity of the infrared light collected by the light receiving part is increased. Since it reaches the bottom and is reflected back to the light receiving unit, the intensity of the infrared light collected by the light receiving unit becomes small. Therefore, if there is a passenger under the infrared sensor, and there is no occupant, there is a big difference in the intensity of the infrared light collected by the light receiving unit.

Next, in order to independently recognize the position of each occupant in the elevator, the controller 130 determines the independent regions of the sensors distinguished from each other in correspondence with the position of each occupant from the on state of the sensors (step 113). . Herein, the independent areas of the sensors refer to areas of sensors corresponding to the position of a certain passenger, which are set by the controller 130 from on state information of the sensors.

Specifically, it will be described with reference to FIG. 2. The ON state of the sensors calculated by comparing the measured values of each sensor with a reference value does not indicate which sensor corresponds to which occupant's position. In Fig. 2 the regions 310, 320, 330 and 340 of the sensors are shown, which are all adjacent to each other in the horizontal, vertical or diagonal direction so that by themselves it is not known how they correspond to the occupant's position. Therefore, in order to determine the independent area of the sensors, the shape of the area of the sensors to be turned on for a certain occupant should be stored in advance in the memory unit 120 as reference information, and the controller 130 compares the reference information. Determine the independent area of the sensors. At this time, the reference information includes the area information of the sensors in the on-state for various people, and also includes the area information of the on-state sensors for various poses such as when standing upright, bent at the waist, or tilting the waist back. It is preferable to include. As a result, the controller 130 may determine which state the independent area of the sensors is present by comparing the reference information.

2 shows an example in which the independent area of the sensors is recognized as a hexagonal shape with respect to the standard form when the occupant is standing upright. Thus, in such a case, the regions 310, 320 and 330 of the sensors would represent the independent regions of the sensors corresponding to the position of each occupant. On the other hand, the area 340 is an area recognized by one sensor and itself cannot be recognized as an independent area according to reference information. It may be the area recognized when the occupant corresponding to the independent area 310 or 320 lifts one arm horizontally, for example, but it does not know exactly where it originated from.

Next, if it is determined that there is an independent area of the sensors for the new person (step 120), the controller randomly assigns an ID to the independent area of the person (step 130). As described above, the controller 130 can maintain the information about the person consistently even if a person moves in the elevator by assigning an ID to the independent area and tracking the movement of the independent area. If the independent area of the new person is not recognized, then no new person is in the elevator, so step 130 is not performed and the process proceeds to the next step.

Next, the controller 130 tracks the independent area and determines whether the independent area is out of the elevator, that is, whether the elevator has been displaced (step 132). Is deleted (step 134). Of course, only the ID of the person is deleted and the data on the independent area of the elevator occupant, that is, the data on the movement of the occupant in the elevator, is not deleted in the memory unit 120 in order to keep it as part of the record in case of emergency. It may not. On the other hand, since the data related to the independent area of the occupant is redundant when the general image data is stored by the surveillance camera, it may be desirable not to store the data in the memory unit 120. On the other hand, if there is no one who gets off the elevator, step 134 is not performed and the process proceeds to the next step.

Next, in order to determine whether a dangerous situation has occurred in the elevator, the movement and deformation of the independent regions of the sensors are tracked to determine whether the independent regions exhibit excessive irregular movement or shaking above the reference value (step 140). . In this case, whether the movement of the independent region, that is, the movement of the subject is excessive movement, may be determined by whether the movement of the centerline or the contour of the human body moves faster or faster than a predetermined criterion. Can be determined according to whether or not the similar movement is repeated.

For example, hitting the beat with your hands or feet in the elevator or singing aloud can be judged as a repetition of similar movements, and hitting someone next to you with a fist is not a repetitive movement. It can be determined by the movement. At this time, an additional sensor-on state may appear that is not detected in the standing state, and this new sensor-on state is useful information for determining irregular movement or shaking of the subject.

If the subject's movement is not excessive and irregular than the reference value, the operation is recognized as a non-hazardous situation, and if so, the process proceeds to the next step.

Next, it is determined whether the subject is in physical contact with another person (step 150). If an occupant is regarded as a dangerous situation because of the irregular movement, the possibility of error in the situation judgment increases. To reduce this error, it is desirable to determine whether the subject is in contact with another person.

Whether an occupant is in physical contact with another occupant can be determined by the proximity and overlap between the independent areas of sensors for that occupant. As shown in FIG. 3, the independent regions 310 and 320 share two sensors. This means that the independent areas 310 and 320 are in contact with each other, which means that the occupants are in physical contact or very close.

When a person makes physical contact with another person and moves irregularly at the same time, it may be affectionate in an elevator by mutual agreement, or the person is molesting another person, or vice versa. You may be violent against someone or vice versa. Therefore, except in the first case, there is no error since a criminal act or a dangerous situation is occurring in the elevator. The first case corresponds to a case that can be ignored that does not occur extremely in the elevator, the elevator security system of the present invention can be said that there is almost no error in the risk situation judgment.

If it is determined that there is no physical contact, the process returns to step 110, and if there is physical contact, the process proceeds to the next step.

On the other hand, when a friend tries to strike with a joke, an error may occur because it may be judged as an irregular movement and physical contact. To reduce such an error, a high number of irregular movement and physical contact to be recognized as a dangerous situation is set. Can be. It is also possible to reduce the error rate by combining the following means.

That is, next, in order to further reduce the error rate, it is determined whether the volume of the voice received from the microphone 140 is greater than or equal to the reference value (170). When a criminal act or dangerous situation occurs in an elevator, the victim usually screams or makes a loud noise. Therefore, if the loudness of the voice is more than the reference value can be recognized as a dangerous situation. If the volume of the received voice is smaller than the reference value, it is not a dangerous situation, and the process returns to step 110.

If it is determined that a hazard has occurred in the elevator, two procedures are carried out as follow-up. First, the control unit 130 broadcasts a warning message in the elevator (step 190), and transmits the surveillance video and audio to the danger situation notification and help request computer device 200 installed outside the elevator (step 210). In this case, the warning message may inform the criminal that the current situation is being displayed outside the elevator, and soon other people will come to the elevator to rescue the victim and arrest the criminal. It may also be simply a announcement that the video and audio inside the elevator are being stored and recorded. Such broadcasts allow criminals to give up their criminal will and escape.

Then, as shown in FIG. 8, the dangerous situation notification and help request computer device 200 installed outside the elevator receives and displays the monitoring video and the voice (step 310) (320). In addition, the computer device 200 broadcasts a notification that a dangerous situation has occurred and broadcasts a request for help to those passing by the place. The computer device 200 is installed in a place where people are frequently coming and going outside the elevator. Frequent visits to the building can be in the lobby or the floor where the door is installed. Therefore, those who watch and listen to the broadcast by the computer device 200 recognize the occurrence of the dangerous situation in the elevator and actively perform the victim relief. Since the computer device 200 is installed in a place where the traffic of the person closest to the elevator is frequent, relief of the victim can be performed immediately.

On the other hand, as a follow-up measure separate from this procedure, the controller 130 broadcasts the victim action guide message in the elevator (step 200). Such guidance message may be to broadcast a notification message to shock the elevator or a notification message to scream if the situation currently occurring to the victim is indeed a dangerous situation.

Next, it is determined whether the impact or scream applied to the elevator is greater than or equal to the reference value (step 220). In such a case, since the victim is actively seeking help in a dangerous situation, the atomizing material that incapacitates the body such as the tear gas installed in the elevator is injected (step 230). It is not easy for any criminal to overwhelm the victim's mouth, hands and feet at the same time, so the victim can request special measures in an emergency. If there is no shock or scream above the threshold, go to the next step.

Next, it is determined whether the dangerous situation is terminated (step 240), and if so, the transmission of the surveillance video and audio to the external computer device 200 is stopped (step 250) and the program is terminated. On the other hand, if the risk situation has not yet finished, the process returns to step 210 and continuously transmits the surveillance video and audio to the external computer device (200).

The end of the danger situation can be carried out by ordering the release of the danger from the management office or by pressing the danger release switch installed inside the elevator. It is desirable to enable the hazardous release switch to be pressed after opening the cover by a special device. The end of such a dangerous situation causes the external computer device 200 to transmit a signal that the dangerous situation has ended.

On the other hand, referring to Figure 8, the external computer device 200 continues to display the video of the dangerous situation inside the elevator continuously until receiving the dangerous situation end signal, and if receiving the dangerous situation end signal (step 330), The video display is stopped and a routine advertisement is displayed (step 340).

100: main part of the elevator security system installed in the elevator
110: sensor matrix 120: memory
130: control unit 140: microphone
150: surveillance camera 160: speaker
170: display 180: communication unit
200: Danger situation notification and help request computer device installed outside the elevator
210: control unit 220: display
230: speaker 240: communication unit
300: management office

Claims (9)

Sensor matrices installed on the floor or ceiling of the elevator in an equally spaced array in the form of horizontal and vertical nxn or nxm (3 ≦ n <m) matrices; A memory unit which stores a state of each sensor of the sensor matrix; And elevator security system including a control unit,
The control unit compares the value measured by each sensor of the sensor matrix with a reference value to determine whether the elevator occupant is located above or below the sensor, and if the elevator occupant is located above or below the sensor, An elevator security system, characterized in that the position of the elevator occupant is grasped by storing it in the memory unit if it is on and off. The method of claim 1,
The control unit is an elevator security system, characterized in that for recognizing the independent areas of the sensors distinguished from each other in correspondence with the position of each occupant from the on (on) state of the sensors. The method of claim 2,
The independent area of the sensor is an elevator security system, characterized in that determined by the control unit compared to the shape of the area of the sensor that is on for each occupant. The method of claim 3,
The control unit tracks the movement or deformation of the independent areas of the sensors, the elevator security system, characterized in that it is determined to be a dangerous situation if the independent area exhibits excessive irregular movement or shaking above the reference value. The method of claim 4, wherein
And the control unit determines that the independent area of the sensors is in a dangerous situation when the independent area of the sensors contacts the independent area of other sensors during the excessive irregular movement or shaking. The method of claim 5,
The elevator security system further comprises a microphone, wherein the control unit determines whether the voice signal received by the microphone has a strength greater than the reference value, in that case it is determined that the risk situation is an elevator security system. The method of claim 1,
The sensor matrix is installed on the elevator floor to detect the weight of the occupant, the infrared sensor installed on the elevator ceiling to detect infrared radiation emitted by the occupant, and the elevator is installed on the ceiling to emit the infrared light downwards Elevator security system, characterized in that consisting of a sensor selected from the group consisting of an infrared sensor for receiving the infrared light reflected by the emitted infrared light. The method of claim 1,
The security system for the elevator further includes a surveillance camera for photographing the inside of the elevator, and a risk situation notification and help request computer device is installed in a place frequented by people outside the elevator, the risk situation notification and help request computer device The elevator security system, characterized in that for receiving the video of the dangerous situation photographed by the surveillance camera to display and display an alarm indicating that the dangerous situation to help people passing by the place for help. The method according to any one of claims 1 to 8, wherein
The control unit notifies a crime victim through a speaker installed in the elevator, a notification message for shocking the elevator or a screaming notification message if the current situation is actually a dangerous situation, and the impact exceeding the threshold value applied to the elevator by the victim. Or elevator security system characterized in that to spray the lethargy material to neutralize the person in the elevator when screaming.

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