KR101489661B1 - Alarm and block system to prevent approaching - Google Patents

Abstract

The present invention relates to an access sensing and alarm system which is provided with an independent power source using a solar battery and a secondary battery; operates an alarm while forming a virtual barrier wall when sensing the approach of a wild animal or a person approaching illegally in the range of a certain area such as an area around a road, a crop cultivation area, etc., thereby turning away the animal or person approaching; and also visually displays a wild animal appearance area to a driver who drives around the road. Accordingly, the access sensing and alarm system can secure the protection of a wild animal and the safety of a passenger in a vehicle and also prevent damage or like in an access restriction area including a crop cultivation area. The present invention provides an alarm and barrier system for access prevention comprising multiple alarm units. The alarm units comprise an independent power source using sunlight and are separately installed on the top of a guardrail or a separate pole in a roadside or an access restriction area. The alarm units sense the movement or approach of a wild animal or a person who approaches a road or an access restriction area and operate the alarm. Also, the alarm units check whether the movement or approach of a wild animal or a person is sensed in at least two different alarm units adjacent mutually by communicating with another adjacent outside alarm unit, and generate an outside alarm unit actuation control signal to operate the surrounding other alarm units when the actuation of adjacent different alarm units is checked. Accordingly, the alarm and barrier system for access prevention can secure the protection of a wild animal and the safety of a passenger in a vehicle and prevent damage in an access restriction area.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an alarm and blocking system,

The present invention relates to an alarm and blocking system for preventing access, and more particularly, to an alarm and blocking system for preventing access, and more particularly, When an approach is detected, an imaginary barrier wall is formed and an alarm is activated to return the approaching animal or person. At the same time, the driver who drives around the road can visually indicate that the area is a wild animal, And to an approach detection and alarm system which can prevent damage in an access restriction area including a safety area as well as a crop cultivation area.

Recently, large-scale predators have disappeared, and eclipses, raccoons, and wild boars have increased rapidly, eco-systems have been cut off due to increasing roads, and habitat is gradually fragmented. Traffic accidents caused by road-kill that lead to death are increasing every year.

In particular, a road-keel accident on the highway leads to a situation in which the driver suddenly manipulates the handle or abruptly brakes to avoid an unexpected situation, which leads to accidents such as collision with the vehicle or collision with the rear vehicle There is a great possibility that the possibility of such a serious accident that the life of the vehicle occupant is exceeded beyond the damage of the vehicle or the death of the wild animal is posed.

In order to prevent such roadkill accidents, eco corridors on the roads or fences for the entrance of wild animals into the roads and the induction to the ecological aisles are installed. However, due to economic and physical limitations, There is a limit.

In this connection, in Korean Utility Model Application No. 20-2012-0004019 (published on June 6, 2012; hereinafter referred to as "Patent Document 1")), a sound of a high frequency or a low frequency except for an audible frequency There is known a technique for preventing road accidents by preventing traffic accidents by preventing a car running near by wild animals from approaching.

According to the patent document 1, there are provided a microcomputer for generating ultrasonic waves, a control module including an amplifying device for receiving and amplifying ultrasonic waves from a microcomputer, a speaker for receiving and amplifying the ultrasonic waves amplified from the control module, , And a manually operated power switch, and emits ultrasonic waves to the outside of the automobile, thereby preventing animals that can hear ultrasonic waves from approaching the automobile.

In the meantime, Korean Patent Publication No. 10-2013-0045782 (published on May 3, 2013, hereinafter abbreviated as "Patent Document 2")) is capable of suppressing vehicle accidents with respect to moving wildlife by vehicles in operation. Techniques relating to the system are known.

According to Patent Document 2, a sensing unit for sensing the movement of wild animals within a range adjacent to a road, and a sensing unit for synchronizing when the movement of the wild animal is sensed and guiding wild animals out of the range, A display unit arranged to be spaced apart from the sensing unit and configured to display a warning message to the driver driving the vehicle, which is synchronized when the sensing unit senses the movement of the wild animal and approaches the sensing unit, and a sensing unit, And a control unit that is electrically connected to the unit and drives the alarm unit and the display unit by receiving a detection signal from the sensing unit. The control unit controls the entry of the wild animal approaching the road, And to detect wild animals that are adjacent to or on the driveway. And wherein to alert while driving in a car unhaengja.

Korean Patent Laid-Open Publication No. 10-2013-0085668 (published on March 30, 2013, hereinafter abbreviated as "Patent Document 3") discloses a guard that prevents rod kills and protects the safety of vehicle occupants as well as protecting wild animals. Techniques relating to fence systems are known.

According to Patent Document 3, there are provided first and second vehicle detection sensors installed on a lane of a road at predetermined intervals so as to sense the movement of the vehicle, and a plurality of dogs are connected along both side edges of the road, And a plurality of transverse protection fences each of which is provided between the first vehicle sensing sensor and the second vehicle sensing sensor of the connecting portions of each of the transverse protection fences and provided with an ecological passage formed so that the animals can traverse the road A pair of transverse passage fences, and a door which is slidably installed to the transverse passage fences, respectively, and which receives the detection of the vehicle by the first and second vehicle detection sensors, respectively, and opens and closes the ecological passage of the transverse passage fences, To encourage safe driving and to prevent traffic accidents and injuries from occurring in the course of crossing roads to wild animals. As it is.

However, according to the related art, there is a limit in that, in the case of Patent Document 1, the driver is not always operated but is temporarily used by the driver manually operating the power switch. That is, when the road kills are caused by wild animals that suddenly appear when suddenly driving on a quiet road without a street light at night, when the vehicle is traveling in a wild animal viewing area, the driver operates the device manually Prevention of road kills is very difficult to expect in reality, and even though there are animals responding to a frequency lower than that of a sound wave, only ultrasonic waves are used so that the selection range of the sound source for preventing the rod kills is narrow And its application range is also very limited. In Patent Document 2, there is a problem that there is no method that can physically block the access of wild animals to the road. In Patent Document 3, there is a problem in that a barrier wall for blocking the access of wild animals to the road is separately provided There is a problem in that it must be installed by a physical method of.

KR 20-2012-0004019 U 2012.06.08. KR 10-2013-0045782 A 2013.05.06. KR 10-2013-0085668 A 2013.07.30.

It is an object of the present invention to provide a solar battery and an independent power source using an angle-adjustable solar cell and a secondary battery, which are capable of detecting a movement or approach of a wild animal or an illegal accessor in a certain area such as a road or a cultivated area, And at the same time driving the warning light to return the approaching animal or person and visually displaying the wildlife viewing area to the driver of the road, thereby protecting the wildlife and safety of the vehicle occupant as well as cultivating the crop The present invention provides an alarm and blocking system for preventing access to agricultural products in a restricted access area such as a local area.

In order to achieve the above object, an embodiment of the present invention provides a method of controlling a road or agricultural crop, which is provided at an upper end of a guard rail or an independent pole of an access restricted area including a roadside or a crop cultivation area, Detecting proximity of a wildlife or accessor adjacent to the access restricted area including the cultivation area, driving the alarm and communicating with neighboring alarm units to determine whether there is proximity detection of wild animals or accessors in two or more neighboring alarm units And a plurality of alarm units for generating an external alarm unit drive control signal for activating other neighboring alarm units when driving to the neighboring alarm unit is confirmed.

In the alarm and blocking system for preventing access according to an embodiment of the present invention, the external alarm unit drive control signal may be a sequential drive control signal for sequentially driving a plurality of alarm units according to the order value of each alarm unit, And a simultaneous drive control signal for simultaneously driving the plurality of alarm units regardless of the order value of each alarm unit.

In the alarm and blocking system for access prevention according to an embodiment of the present invention, each alarm unit includes an area around the road or a crop cultivation area so that proximity of an adjacent wildlife or accessor can be detected within a predetermined monitoring radius The guard rails and the independent poles of the access restricted area are spaced apart from each other by an interval within a predetermined monitoring radius, and the area within the monitoring radius formed by any one alarm unit and the monitoring radius of one or more neighboring alarm units And an imaginary blocking wall is formed on an extension line connecting the centers of the regions within the monitoring radius of one or more neighboring alarm units.

According to the present invention, independently installed at the top of a guardrail or an independent pole including the periphery of a road or a cultivation area, and securing an independent power source using a solar cell or a high-performance battery, And outputs an acoustic wave or a light wave to return the animal approaching the road side from the road, and at the same time, the driver can visually indicate that the animal is a wild animal appearing area, thereby suppressing the occurrence of a wild animal accident caused by the vehicle in operation There is an advantage that the prevention of damage to crops can be minimized.

Further, the present invention provides a sunflower angle adjusting device capable of improving the charging efficiency of a solar cell, and all the alarm apparatuses in which two or more adjacent alarm units are in operation are sequentially or simultaneously interlocked to form a virtual blocking wall It is possible to prevent access of wild animals or accessors within a limited area formed by the imaginary blocking walls, thereby preventing damage to the road kills on the roads or damages in the access restricted areas.

1A and 1B are reference views showing an example of the installation of an alarm and blocking system for preventing access according to the present invention.
FIG. 2 is a block diagram illustrating a detailed configuration of the alarm unit of FIGS. 1A and 1B.
FIG. 3 is an operation flowchart showing an example of the configuration of a driving process for forming a virtual blocking wall mounted on the control unit of FIG. 2. FIG.
4 is a perspective view showing an embodiment of an alarm unit according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration and overall operation of an alarm and blocking system for preventing access according to the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention. Therefore, it should be understood that the embodiments described herein and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and that various equivalents and modifications may be made thereto at the time of the present application shall.

1A and 1B are views showing examples of installation of an alarm and blocking system for preventing access according to the present invention, wherein FIG. 1A is an example installed around a road, FIG. 1B is an example of an access restriction It is an example installed in the area.

As illustrated in FIGS. 1A and 1B, the alarm and blocking system of the present invention includes a plurality of alarm units 100a-100n installed at the tops of guard rails or independent poles of an access restricted area on the road side or a certain area, Each of the alarm units 100a-100n has a predetermined monitoring radius (movement or approach detection range of a wild animal or an accessor by a motion sensor constituting the sensor unit, and this value varies depending on the type of a motion sensor) Guard rails or access rods of an access restricted area such as a roadside or crop cultivation area to allow movement or proximity detection of adjacent wildlife or accessors within a detection radius of less than 10 m) The alarm units 100a to 100n are installed at intervals of a predetermined distance within a predetermined monitoring radius, (A12, a13) between an area a1 within a monitoring radius formed by an arbitrary one alarm unit and a respective monitoring radius of one or more neighboring alarm units, and an intersection area a12, a13 within each monitoring radius of one or more neighboring alarm units Is formed on the extension lines (x1, x2) connecting the centers of the regions a2, a3 of the regions a2, a3.

The plurality of alarm units 100a to 100n have independent power sources using sunlight and are installed adjacent to a roadside or an access restricted area and detect the movement or approach of a wild animal or an accessor to drive an alarm, Communicating with other external alert units to ascertain whether there is movement or proximity detection of wild animals or accessors in two or more other alert units that are adjacent to each other, and driving for two or more neighboring alert units And generates an external alarm unit drive control signal for activating other peripheral alarm units when it is confirmed. The external alarm unit drive control signal generated in the alarm unit is a sequential drive control signal for sequentially driving a plurality of external alarm units 100a to 100n according to the order value of each alarm unit or a plurality of alarm units 100a to 100n ) To be simultaneously driven regardless of the order value of each alarm unit.

FIG. 2 illustrates an example of the alarm unit 100a (in FIG. 1, only one alarm unit is extracted from the plurality of alarm units 100a-100n in FIGS. 1A and 1B, FIG. 3 is an operational flowchart showing an example of the configuration of a driving process for forming a virtual blocking wall mounted on the control unit of FIG. 2, and FIG. 4 is a flowchart Each of the alarm units 100a-100n of the present invention includes a sensor unit 110, a solar battery unit 120, a control unit 130, a secondary battery unit 140 A power converter 150, an alarm unit 160, a storage unit 170, and a communication unit 180. As illustrated in FIG. 4, a unit alarm Unit. ≪ / RTI > In addition, each of the alarm units 100a-100n having such a configuration may further include an angle adjusting unit 121, and may be configured as another embodiment.

The sensor unit 110 is installed at the upper end of a guardrail or an independent pole of an access restriction area including a roadside or a crop cultivation area and is provided at the upper part of a road or a cultivated area where a movement or approach of a wild animal or an accessor The sensor 130 is electrically connected to the sensor input terminal of the controller 130 so as to transmit the detection result of each sensor to the controller 130 as an input signal. .

The solar cell unit 120 includes at least one solar cell panel for collecting sunlight. The solar cell unit 120 converts solar energy into electrical energy, supplies operating power to the control unit 130, Thereby accumulating electric energy of the battery. The solar battery unit 120 may further include a conventional angle adjuster 121 capable of adjusting the angle along the movement of the sun.

The control unit 130 receives the electric energy generated by the solar battery unit 120 directly and operates its operation to control the operation of the unit alarm unit as a whole and controls the operation of the sensor unit 110 or the external alarm unit drive control signal As an input signal, and drives the alarm unit 160 to form a virtual blocking wall. 3, the controller 130 may directly supply the electric energy generated by the solar battery 120 to the power supply unit 120. [ (S102) of loading the initial alarm unit sequence number in the storage unit 170 when the receiving operation is driven (Y branch of S101), a step of detecting the movement or approach detection signal of the wild animal or accessor by the sensor unit 110, (S103 and S104), respectively, whether or not the external alarm unit drive control signal received through the communication unit 180 is input. (Y branch in S103 or Y branch in S104), the alarm unit 160 is driven and the alarm unit driving state of its own is switched to the external (S105, S106); checking whether an order value of another external alarm unit is received (S107); determining whether or not an alarm unit (Y branch in S107), the received other alarm unit sequence value is compared with the initial loaded alarm sequence number value of itself and the immediately preceding or succeeding neighboring alarm unit number value (S108, S109). If it is confirmed that the alarm unit having the immediately preceding or following sequential value adjacent thereto is confirmed to be driven (Y branch in S108 or S109 in S109) Y branch) and generating and outputting a drive control signal of an external alarm unit for sequentially or simultaneously operating all the other alarm units (S110).

This approach detection and imaginary blocking wall forming process is performed in a state where there is no movement of a wild animal or an accessor or an approach detection signal, and there is no input of an external alarm unit drive control signal (N branch of S104) (Step S111). If there is reception of another external alarm unit number value (Y branch of S111), the received alarm unit number value is compared with the initial loaded alarm unit number value (S108, S109), and if there is no reception of another external alarm unit sequence number (N branch of S111) It is checked whether or not a predetermined period of time has elapsed (S112). There is no movement of a wild animal or accessor or an approach detection signal during the lapse of the designated time (N branch of S103) When there is no input of the sub-alarm unit drive control signal (N branch of S104) and there is no reception of the other alarm unit sequence value outside (N branch of S111), the operation of the alarm unit is stopped (S113) (S103), so that no more power is wasted.

Further, the controller 130 may further include a self-diagnosis function, a built-in alarm lamp, a central monitoring function, and a remote check function. Through the installation of the self-diagnosis function, the control unit 130 transmits a self- Or to display the operating state of the system via a built-in alarm lamp.

The secondary battery unit 140 is configured by a secondary battery. The secondary battery unit 140 accumulates electric energy produced by the solar battery unit 120 and supplies the stored DC power to the power converter 150 ).

The power conversion unit 150 includes an internal circuit such as a power conversion device such as an inverter, a switching device and / or a power control circuit, converts the DC power supplied from the secondary battery unit 140 into an AC power, And supplies the operation power and the operation power necessary for driving the system to each part.

The alarm unit 160 may be operated by the control unit 130 to emit an alarm signal or an alarm sound to warn the accessor or to generate an alarm signal selected from a light wave or a sound wave that the wild animal dislikes, A warning message is output for warning of the driver's attention. For this, the alarm unit 160 includes an alarm generator 161 and a caution display unit 162.

The alarm generator 161 is driven by a movement of a wild animal or an accessor or an approach detection signal by the sensor unit 110 and generates an alarm signal selected from a light wave or a sound wave that the wild animal dislikes, And generates an alarm light or an alarm sound for warning.

The warning display unit 162 is driven by a movement of a wild animal or an approaching person or an approach detection signal by the sensor unit 110, and a warning message for caution driving (for example, "And the like.) The attention display unit 162 may be constituted by a warning light for visually indicating that it is a wild animal sightseeing area or an access restricted area.

The storage unit 170 is accessed by the control unit 130 and stores a unique order value for each alarm unit that is initially set to a value unique to each individual alarm unit so that the controller 130 can identify each individual alarm unit . For example, as shown in FIG. 1A, when a total of five alarm units are installed adjacent to each other at a predetermined interval, the inherent order value of each alarm unit may be a unique order value for the first or last alarm unit Is set to 1, the unique order value can be designated so as to have a sequence number incremented by 1 sequentially in the forward or backward direction on the basis of the alert unit. As illustrated in FIG. 1B, When 9 alarm units are installed adjacent to each other with a predetermined interval, when a unique order value for an arbitrary alarm unit is set to 1, each alarm unit installed along the clockwise or counterclockwise direction based on the alarm unit It is possible to designate a unique order value so that each order value increases sequentially by one.

The communication unit 180 is composed of wired or wireless communication means capable of wired communication or short-range wireless communication. The communication unit 180 receives an order value transmitted from another external alarm unit and transmits the received order value to the control unit 130, Sends out its alarm unit number value or drive control signal of another external alarm unit generated by the control unit 130 to the outside.

Operation and effect of the alarm and blocking system for preventing access according to the present invention configured as described above will be described as follows.

The controller 110 includes a sensor unit 110, a solar cell unit 120, an angle adjusting unit 121, a controller 130, a secondary battery unit 140, a power conversion unit 150, an alarm unit 160, And the communication unit 180 are mounted on the printed circuit board and then installed inside the individual housing as illustrated in FIG. 4, when the assembling of the plurality of alarm units 100a-100n is completed, Each of the warning units is installed at the upper end of the guard rail or the independent pole of the road side or the access restricted area so as to be spaced apart from each other within a predetermined monitoring radius, as illustrated in FIG. 1A or 1B.

When the operation of the individual alarm units is activated (Y branch of S101), the control unit 130 of each of the alarm units 100a-100n receives the electric energy generated by the solar battery unit 120 in the state of being installed as described above, The operation is started by supplying power to a place where the operation power supply is required as a whole.

The control unit 130 accesses the storage unit 170 to load a unique alarm unit number value of its own initially set in step S102 and transmits a motion detection signal or an alarm signal through the sensor unit 110 and the communication unit 180, It is checked whether or not the external alarm unit drive control signal is input (S103, S104). At this time, if the movement or approach detection signal of the wild animal or accessor is input by the sensor unit 110 as a result of the check (Y branch of S103), the control unit 130 approached a wild animal or a person near the alarm unit installation area On the other hand, when an external alarm unit drive control signal is input through the communication unit 180 (Y branch of S104), it is determined that a wild animal or a person is approaching the neighboring other alarm unit installation area .

Accordingly, the control unit 130 drives the alarm unit 160 (S105) as a result of the recognition, and controls the alarm unit 160 to select any alarm signal selected from a light wave or a sound wave that the wild animal dislikes, an alarm light or alarm sound for warning the accessor, A warning message for caution driving, or a warning light for visually indicating that the area is a wildlife viewing area or an access restricted area, while simultaneously driving its alarm unit driving state to another external alarm unit (in particular, a neighboring alarm unit (S106), the control unit 130 checks whether another external alarm unit number value is received (S107). If the result of the determination is affirmative, (Y branch in S107), the received alarm unit sequential value is stored in the initial loaded state of the own alarm unit (S108, S109) whether or not the alarm unit having the immediately preceding or succeeding order value neighboring thereto is operated.

If it is confirmed that the other alarm unit having the immediately preceding or following sequence value neighboring to itself is confirmed to be driven (Y branch in S108 or Y branch in S109), the control unit 130 sequentially or simultaneously (S110) by generating an external alarm unit drive control signal for activating the alarm unit to form an imaginary blocking wall which can prevent access to wild animals or people close to one or more alarm units installed in the roadside or the access restricted area do.

In addition, in the state where no wildlife or accessor movement or approach detection signal is present and there is no input of the external alarm unit drive control signal (N branch of S104), the control unit 130 determines whether or not reception of the external alarm unit sequence number (S111). If there is reception of the external alarm unit sequence number (Y branch of S111), the received alarm unit sequence number is compared with the initially loaded own alarm unit sequence number, and the immediately preceding or following sequence number (S108, S109). However, if there is no movement or access detection signal of the wild animal or the accessor and there is no input of the external alarm unit drive control signal ( (N branch of S104), it is checked whether or not a predetermined predetermined time elapses (S112) in the case where there is no reception of another external alarm unit sequence number (N branch of S111) If no external alarm unit drive control signal is input (N branch of S104) and no external alarm unit sequence value is received while there is no movement of a wild animal or an accessor or an approach detection signal (N branch of S103) (N branch of S111), the operation of the alarm unit is stopped (S113), thereby further reducing power consumption for the electric energy stored in the secondary battery unit.

According to the present invention, a high-efficiency solar cell capable of adjusting a sun-oriented angle and an independent power source using a high-performance battery are provided, so that a virtual barrier By driving the warning light at the same time as the wall is formed, the animal or person approaching the roadside or the restricted access area is returned, and at the same time, the wildlife protection, the safety and / Or the damage in the access restricted area can be prevented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

100a-100n: Alarm unit 110: Sensor unit
120: solar battery part 121: angle adjusting part
130: control unit 140: secondary battery
150: power conversion unit 160: alarm unit
161: alarm generating unit 162: warning display unit
170: storage unit 180: communication unit

Claims (6)

A sensor comprising at least one sensor for detecting access of a wildlife or accessor approaching a roadside or access restricted area;
A solar battery part composed of a plurality of solar panels for collecting sunlight and collecting sunlight to produce electric energy;
A secondary battery unit for storing electric energy produced by the solar battery unit and supplying the stored electric energy to an operation power source;
A power conversion unit for converting the DC power supplied from the secondary battery unit to AC power and supplying the AC power to the respective driving power sources;
An alarm unit for generating an alarm sound or an alarm light according to the approach of a wild animal or an accessor; And
The control unit controls the operation of the alarm unit by receiving the access signal detected by the sensor unit, controls the electric energy produced from the solar battery unit to be accumulated in the secondary battery unit, controls the power conversion unit to supply the DC power supplied from the secondary battery unit to the AC power source And supplies the driving power to the respective parts;
A plurality of alarm units are formed by interlocking one or two or more alarm units,
The alarm unit includes:
And receives the order number of the corresponding alarm unit transmitted from another external alarm unit and transmits the received order number to the control unit, Further comprising a communication unit for transmitting a drive control signal of an external other alarm unit generated by the control unit to the outside,
Further comprising a storage unit for storing a unique order value initially set to a value unique to each alarm unit.
delete delete The method according to claim 1,
Wherein,
An alarm unit sequence value set in an initial state in which the operation is driven by directly receiving the electric energy produced by the solar battery unit is loaded in the storage unit and an approach detection signal of a wild animal or an accessor by the sensor unit, Receives the external alarm unit drive control signal received through the external alarm unit drive control signal as an input signal to control the operation of the alarm unit and informs the external alarm unit of the operation state of the alarm unit, When the other alarm unit number value of the external unit is received, the received alarm unit number value is compared with the initial loaded alarm unit number value, and the alarm unit number immediately before or after the alarm unit number immediately adjacent to itself If it is confirmed that the operation of the alarm unit having the order value immediately before or after the neighboring neighbor is confirmed, For access protection, comprising a step of generating a drive control of the alarm unit of the other external signals for operating all of the other of the external alarm unit sequentially or simultaneously warning and protection system.
The method according to claim 1,
The alarm unit includes:
Communicates with other external alert units to determine whether there is an access detection of wild animals or accessors in two or more other alert units neighboring each other, And generates an external alarm unit drive control signal for activating other peripheral alarm units.
6. The method of claim 5,
Wherein the external alarm unit drive control signal comprises:
A sequential drive control signal for sequentially driving a plurality of alarm units according to the order value of each alarm unit or a simultaneous drive control signal for simultaneously driving a plurality of alarm units regardless of the order value of each alarm unit. Alarm and blocking system for access prevention.

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