KR100958430B1 - Vibration sensor and intrusion detection method thereof - Google Patents

Abstract

The intrusion detection method of the vibration sensor according to the present invention receives material information of a wall surface from a user and changes preset values in the vibration sensor. Then, the signal generated from the intruder is processed and classified according to the vibration magnitude, and the intrusion is detected through a different algorithm according to the vibration magnitude based on the changed setting value. Then, the intrusion detection result according to the vibration magnitude is combined to detect the final intrusion, and an alarm signal is output when the intrusion is detected.

In this way, an intrusion is detected for each input signal by vibration magnitude, and when the intrusion is detected, the internal value is changed in consideration of the external environment and the installation conditions, in particular, the material of the wall, and thus the malfunction is caused by the intrusion detection. Can be minimized.

Vibration sensor, intrusion, detection, vibration magnitude, ADC, wall material

Description

Vibration sensor and its intrusion detection method {VIBRATION SENSOR AND INTRUSION DETECTION METHOD THEREOF}

1 is a view showing the configuration of a conventional vibration sensor.

2 is a view showing the configuration of a vibration sensor according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a detailed configuration of the microcomputer shown in FIG. 2.

4 to 6 are views illustrating an operation process of the first to third detection determination units according to the exemplary embodiment of the present invention.

The present invention relates to a vibration sensor, and more particularly, to a vibration sensor and an intrusion detection method thereof to minimize false alarm rate in consideration of environmental changes and materials of the wall surface.

Recently, due to the development of the electronic and telecommunications industry, security, crime prevention, and safety nets have been established in major areas such as major banks, museums, and national industrial institutions to detect intruders and warn intruders at night or in the absence of users. It is strengthening the security system to inform the public.

On the other hand, intruders are caused to vibrate by their weight or moving speed. Therefore, it is installed in the inner wall, glass window or entrance of the area requiring security and crime prevention, and detects an abnormal signal (for example, vibration, shock, cutting, climbing up, etc.) generated from the intruder's movement and recognizes intrusion and alarms. There is a vibration sensor that generates a signal.

1 is a view showing the configuration of a conventional vibration sensor. In FIG. 1, it is assumed that the vibration sensor is installed on the inner wall of a specific building.

As shown in FIG. 1, the conventional vibration sensor includes a piezoelectric element 10 for converting a magnitude of vibration into an electric signal (voltage), an amplifier 20 for amplifying the converted electric signal, and a first vibration sensing general vibration. The control unit 30, the second control unit 40 for detecting the fine vibration, the logic unit 50 for combining the detection results of the first and second control unit 30, 40 and the driving unit for generating an alarm signal in accordance with the combination result (60).

At this time, the first controller 30 compares the signal amplified by the amplifier 20 with the first reference signal which is set in advance, and the signal amplified as a result of the comparison is larger than the first reference signal. The counter unit 34 increases the count and outputs a detection signal when the count count increased within the set time is greater than the preset count, and a timer 36 checking the set time.

The second control unit 40 compares the signal amplified by the amplifying unit 20 with a preset second reference signal 42, and amplifies the signal when the amplified signal is larger than the second reference signal. The charging circuit unit 44 for charging the signal includes a third comparator 46 for outputting a detection signal when the charged signal is greater than the third reference signal by comparing the charged signal with a preset third reference signal.

In the vibration sensor having such a structure, when an impact is applied to the wall surface from the outside, the magnitude of vibration generated from the impact applied through the piezoelectric element 10 is converted into an electrical signal and a pulse signal is output. At this time, since the output signal is very weak, it is input to the amplifier 20 for signal processing and amplified.

In addition, the first controller 30 compares the pulse signal amplified by the first comparator 32 with a preset first reference signal and, when larger than the first reference signal, sets the input count through the counter 34. Increase by ”. The process is repeated for a time set in the timer 36 to output the first detection signal through the counter unit 34 when the input count is greater than or equal to the set count.

In addition, the second controller 40 compares the pulse signal amplified by the second comparator 42 with a preset second reference signal and generates an amplified pulse signal through the charging circuit unit 44 for a time exceeding the second reference signal. Charge it. When the charged pulse signal is larger than the third reference signal, the second detection signal is output through the third comparator 46.

Subsequently, the logic unit 50 logically combines the first and second sensed signals, and the driver 60 outputs the final sensed signal and generates an alarm according to the logic combination result.

In general, the vibration sensor may change the magnitude of an electrical signal due to external environment and installation conditions such as ambient temperature, humidity, dust, and vibration. In particular, the transmission waveform of vibration appears differently depending on the material of the wall surface.

However, the conventional vibration sensor does not consider the external environment and installation conditions, as described above, depending on the magnitude and the number of counts of the first reference signal detects the intrusion to the general vibration, the magnitude and charge of the second and third reference signals Depending on the magnitude of the signal, the vibration sensor detects an intrusion against fine vibrations, causing the vibration sensor to malfunction. In particular, in the case of construction from the outside, continuous noise is transmitted to the charging circuit unit 44, and the charging circuit unit 44 continuously charges a signal for external small noise, which causes a problem in that the vibration sensor malfunctions.

The technical problem to be achieved by the present invention is to provide a vibration sensor and an intrusion detection method thereof that can minimize the malfunction caused by the external environment and installation conditions.

According to one aspect of the invention, there is provided a vibration sensor mounted on the wall to detect the vibration generated from the intruder to generate an alarm signal.

The vibration sensor includes a piezoelectric element that converts the magnitude of vibration generated from the intruder into an electrical signal; A first signal processor configured to process a signal output from the piezoelectric element to sense a vibration of a first magnitude and a vibration signal of a second magnitude greater than the first magnitude; A second signal processor configured to process a signal output from the piezoelectric element to detect a vibration signal having a third magnitude greater than the second magnitude; A material selection unit configured to transfer material information of the wall surface selected from a user; And receiving the wall material information, changing internal setting values, and performing intrusion detection corresponding to the magnitude of each vibration signal based on the changed setting value, from each intrusion detection result according to the magnitude of the vibration signal. It includes a microcomputer to detect the intrusion of the final intruder.

The microcomputer may include: first and second analog-to-digital converters (ADCs) for converting signals output from the first and second signal processors into digital signals and extracting signal sizes; A setting value changing unit which receives wall material information from the material selecting unit and changes a setting value in the microcomputer; And detecting intrusion differently according to vibration magnitudes corresponding to the signal magnitudes extracted from the first and second ADCs based on the changed set value, and finally combining the intrusion detection results according to the vibration magnitudes. It includes a control unit for detecting the intrusion of the intruder.

The control unit may include: a signal discrimination unit classifying the first and second magnitude vibration signals from the signal magnitude extracted from the first ADC; A first detection determiner configured to detect an intrusion into the vibration signal of the first magnitude; A second detection determining unit detecting an intrusion into the vibration signal of the second magnitude; And a third detection determiner configured to detect an intrusion into the vibration signal of the third magnitude. Here, the setting value changing unit may change the setting values differently and transmit the changed setting values to the first to third sensing determination units in order to detect the intrusion corresponding to the vibration signals of the first to third magnitudes.

The first detection determiner may include: a first comparator configured to receive a signal output from the first ADC and compare the first reference signal with a preset first reference signal; A counter unit for increasing a count when the input signal is greater than the first reference signal and outputting an intrusion detection signal when the number of input counts increased during a preset time is greater than a preset count number; And a reset unit which resets the input count value when the number of input counts is less than the set count number during the set time.

The second detection determiner may include: a first comparator configured to receive a signal output from the first ADC and compare the first reference signal with a preset first reference signal; An integration unit for integrating the input signal for a preset time when the input signal is greater than the first reference signal and outputting an intrusion detection signal when the integrated value is greater than the preset second reference signal; A subtraction unit for subtracting the integrated value when the integration time of the input signal has passed the set time; And a reset unit configured to reset when the intrusion detection signal is output or the integration result value is smaller than the second reference signal.

The third detection determiner may include: a first comparator configured to receive a signal output from the second ADC and compare the first reference signal with a preset first reference signal; And an output unit configured to output an intrusion detection signal when the input signal is greater than the first reference signal.

Each of the first and second signal processing units may include: an amplifier configured to amplify an electric signal converted from the piezoelectric element; A filter unit to filter the amplified signal; And a detector for transmitting the filtered signal to the microcomputer, and the amplifying units of the first and second signal processing units may have different amplification degrees.

According to another aspect of the present invention, there is provided an intrusion detection method of a vibration sensor mounted on the wall to detect the vibration generated from the intruder to generate an alarm signal. The method comprises the steps of: a) receiving material information of the wall surface from a user and changing preset values in the vibration sensor; b) pre-processing the signal generated from the intruder and classifying it by vibration magnitude; c) detecting an intrusion through a different algorithm according to the vibration magnitude based on the changed setting value; And d) detecting a final intrusion by combining the intrusion detection result according to the vibration magnitude, and outputting an alarm signal when the intrusion is detected. In this case, in step a), the set value may be changed differently according to an algorithm corresponding to the vibration magnitude.

And b) converting the magnitude of vibration generated from the intruder into an electrical signal; Amplifying the converted electrical signals with first and second amplification degrees, respectively; Extracting magnitudes from the signals amplified by the first and second amplification degrees; And classifying a vibration magnitude from the magnitude of the extracted signal, wherein the vibration magnitude is classified into at least two or more of general vibration, fine vibration smaller than the general vibration, and vibration larger than the general vibration. have.

In addition, the present invention provides a recording medium having a program recorded on the wall having a program of the intrusion detection function of the vibration sensor for generating a warning signal by detecting the vibration generated from the intruder.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.                     

Now, a vibration sensor and an intrusion detection method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fine vibrations, general vibrations, and large vibrations mentioned below represent the magnitudes of signals classified by specific reference magnitudes, and the specific reference magnitudes can be varied by external environment, installation conditions, and the like.

First, a vibration sensor according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

2 is a view showing the configuration of a vibration sensor according to an embodiment of the present invention.

As shown in FIG. 2, the vibration sensor according to the embodiment of the present invention may include a piezoelectric element 110, first and second signal processing units 120 and 130, a microcomputer 140, a material selection unit 150, and a driving unit. And a light emitting unit 170.

The piezoelectric element 110 converts the magnitude of vibration generated from the intruder's movement into an electrical signal (voltage).

The first signal processor 120 may include a first amplifier 122, a first filter 124, and a first detector 126. The piezoelectric element may detect a signal of general vibration and micro vibration. The electrical signal converted from 110 is processed.

The first amplifier 120 amplifies the electrical signal converted by the piezoelectric element 110 to process the signal for the general vibration and fine vibration. In addition, the first filter unit 122 removes noise on the electric signal amplified from the first amplifier 120, and the first detector 124 transmits the electric signal from which the noise is removed to the microcomputer 140. .

The second signal processor 130 includes a second amplifier 132, a second filter 134, and a second detector 136, from the piezoelectric element 110 to detect a large vibration signal. Process the converted electrical signal.

The second amplifier 130 amplifies the electrical signal converted by the piezoelectric element 110 to process the signal for a very large vibration. The second filter unit 132 removes noise of the electric signal amplified from the second amplifier 130, and the second detector 134 transmits the electric signal from which the noise is removed to the microcomputer 140. .

The microcomputer 140 analyzes the electrical signals output from the first and second detectors 126 and 136 to determine whether an intrusion is detected.

The material selector 150 transmits material information of the corresponding wall surface to the microcomputer 140 when a material of the wall surface on which the vibration sensor is installed is selected by the user.

The driver 160 outputs the final detection signal to the outside for the user to know based on the intrusion detection result of the microcomputer 140.

The light emitting unit 170 emits light upon intrusion detection to indicate whether intrusion is detected. The light emitting unit 170 may be made of an LED.

3 is a diagram illustrating an internal configuration of the microcomputer 140 shown in FIG. 2.

As shown in FIG. 3, the microcomputer 140 includes first and second analog and digital converters (hereinafter, referred to as 'first and second ADCs') 142 and 144, a controller 146, and a setting value changer ( 148).

The first ADC 142 converts the electrical signal output from the first detector 126 into a digital signal to extract information about the magnitude of the signal.                     

The second ADC 144 converts the electrical signal output from the second detector 136 into a digital signal to extract information about the magnitude of the signal.

The control unit 146 changes the setting value according to the material of the wall surface and detects an intrusion by applying different algorithms according to general vibration, fine vibration or large vibration from the magnitude of the output digital signal, and detects the intrusion by each algorithm. Combine the results to finally detect the intrusion. The controller 146 having such a function includes a signal determination unit 146-1 and first to third detection determination units 146-2, 146-3, and 146-4.

The signal discriminating unit 146-1 determines whether the general vibration or the fine vibration is from the magnitude of the signal extracted from the first ADC 142.

The first detection determination unit 146-2 includes a first comparison unit 146-2a, a counter unit 146-2b, and a reset unit 146-2c, and a signal of the signal determination unit 146-1. As a result of the determination, in case of general vibration, an intrusion detection signal is output by determining whether an intrusion is made according to a specific algorithm.

The first comparator 146-2a receives a signal output from the first ADC 142 and compares it with a first reference signal which is preset. The counter 146-2b receives an input signal based on a comparison result. If greater than the reference signal, increase the counter. The operation is repeated for a given time to output a control signal for driving the driving unit 160 and the light emitting unit 170 when the number of input counters is greater than the preset number of counters. The reset unit 146-2c resets the value of the input counter when the number of input counters is less than the set counter number at a given time.

The second detection determining unit 146-3 includes a second comparing unit 146-3a, an integrating unit 146-3b, a subtracting unit 146-3c, and a reset unit 146-3d, and determines a signal. As a result, in the case of the fine vibration, whether the intrusion is determined according to an algorithm different from the algorithm of the first detection determination unit 146-2, the detection signal is output.

The second comparator 146-3a receives a signal output from the first ADC 142 and compares it with a second preset reference signal. The accumulator 146-3b receives an input signal based on a comparison result. If it is larger than the reference signal, it is accumulated for the set time. The integration unit 146-3b outputs a control signal capable of driving the driving unit 160 and the light emitting unit 170 when the integration unit 146-3b is larger than the third reference signal. The subtraction unit 146-3c adds up the input signal and subtracts the input signal to a constant value when the set time has passed. The reset unit 146-3d resets the integrated value when a control signal for driving the driving unit 160 and the light emitting unit 170 is output by the integration unit 146-3b.

The third sensing determination unit 146-4 includes a third comparing unit 146-4a and an output unit 146-4b, and when the vibration is large, the first and second sensing determination units 146-2 and 146. The detection signal is output by discriminating whether the signal is detected or not according to the algorithm of -3).

The third comparator 146-4a receives a signal output from the second ADC 144 and compares it with a preset fourth reference signal, and the output unit 146-4b receives an input signal according to a comparison result. If greater than the reference signal, a control signal for driving the driving unit 160 and the light emitting unit 170 is output.

The setting value changing unit 148 receives the material information of the wall surface selected by the user through the material selection unit 150 and changes the setting value according to the material of the wall surface, and then the first to third detection determination units 146-2, 146-3, 146-4). At this time, the setting value changing unit 148 changes the setting value differently according to the intrusion detection algorithm, and transmits the setting value to the first to third detection determining units 146-2, 146-3, and 146-4, respectively.

Next, an operation process of the vibration sensor according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 4 to 6.

First, before describing the operations of the first to third detection determination units 146-1, 146-2, and 146-3, the first to third detection determination units 146-1, 146-2, and 146-3. Will be briefly described before the operation.

When an impact is applied to the wall surface from the outside, the magnitude of vibration generated from the impact applied through the piezoelectric element 110 is converted into an electrical signal and a pulse signal is output. At this time, the output signal is so weak that it is input to the first and second amplifiers 122 and 132, respectively, for signal processing, so that the signals can be read by the first and second ADCs 142 and 144, respectively. Are each amplified. That is, the first and second amplifiers 122 and 132 amplify the signals with different amplification degrees so that intrusion detection can be performed differently according to the magnitude of the signal during amplification.

The signals amplified differently from each other are first and second ADCs 142 inside the microcomputer 140 through the first and second detectors 126 and 136 through the first and second filter units 142 and 134, respectively. , 144).

When the user inputs the material of the wall surface through the material selection unit 150 at the same time as these steps are performed, the setting value changing unit 148 receives the wall material information and changes the setting value according to the wall material. Transfer to third sensing determination unit (146-2, 146-3, 146-4). Then, the first to third detection determination units 146-2, 146-3, and 146-4 determine whether an intrusion is detected through each algorithm based on the changed setting value, and output a detection signal. In the following, the above steps will be omitted and described.

First, the intrusion detection operation for the general vibration performed by the first detection determination unit 146-2 will be described in detail with reference to FIG. 4.

4 is a flowchart illustrating an operation process of a first detection determiner according to an exemplary embodiment of the present invention.

As shown in Figure 4, before starting the algorithm according to the general vibration, the count is cleared and the time is set through the timer (S402). At this time, the setting value changed by the setting value changing unit 148 is input and the setting values in the first detection determination unit 146-2 are changed (S404). Here, the setting value refers to values preset in the microcomputer, that is, a first reference signal, a setting time, and a setting count value. As described above, the setting value changing unit 146-5 changes and inputs setting values to match the algorithm performed by the first detection determining unit 146-2.

Then, the first detection determiner 146-2 performs an intrusion detection operation. The first comparator 146-2a receives a signal output from the first ADC 142 and compares the signal with the first reference signal (S406-S408). When the input signal is greater than the first reference signal, the counter unit 146-2b determines whether the count initialization value is 0 (S410). At this time, when the initial value of the count is 0, the count is increased and the timer is operated (S412). This step (S412) means the start of the intrusion detection operation of the first detection determination unit.

Thereafter, steps S406 to S410 are repeated, and the count is increased when the initial value of the count is not 0 (S414). As such, if the initial value of the count is not 0, it means that the timer is running and currently performing an intrusion detection operation.

The counter unit 146-2b compares the input count value increased in step S414 with the set count value and compares the elapsed time with the set time when the input count value is greater than the set count value (S416-S418). At this time, if the input count value is larger than the set count value within the set time, a control signal capable of driving the driving unit 160 and the light emitting unit 170 is output (S420). On the other hand, the reset unit 146-2c clears the count and resets the timer when the input count value is greater than the set count value but exceeds the set time as a result of checking the elapsed time (S422), and from steps S406 to S418, Repeat. In FIG. 4, the set count value is 5 and the set time is 20 seconds, but is not limited thereto.

Next, the intrusion detection operation for the micro vibration performed by the second detection determination unit 146-3 will be described in detail with reference to FIG. 5.

5 is a flowchart illustrating an operation process of a second detection determiner according to an exemplary embodiment of the present invention.

As shown in Fig. 5, the count is cleared and the time is set through a timer before starting the algorithm according to the micro vibration. In addition, the flag to start the integration (hereinafter referred to as "integration start flag") is turned off (S502). In this case, as described in FIG. 4, the changed setting value is input by the setting value changing unit 148 to change the setting values in the second sensing plate end 146-3 (S504). Here, the setting value refers to values preset in the microcomputer, that is, the second and third reference signals and the setting time. As described above, the setting value changing unit 148 changes and inputs setting values to match the algorithm performed by the second detection determining unit 146-3.

Then, the second detection determiner 146-3 performs an intrusion detection operation. The second comparator 146-3a receives a signal output from the first ADC 142 and compares the signal with the second reference signal (S506-S508). At this time, the second reference signal is set to a predetermined value larger than the noise level. When the input signal is larger than the second reference signal, the integration unit 146-3b determines whether the integration start flag is turned on (S510). At this time, if the integration start flag is not turned on, the integration start flag is turned on and a timer is operated (S512). This step means the start of the intrusion detection operation of the second detection determination unit 146-3.

Thereafter, steps S502 to S510 are repeated, and the integration unit 146-3b accumulates the input signal for a set time when the integration start flag is turned on (S514-S516). If the integration start flag is turned on, this means that the timer is running and currently performing intrusion detection.

The integration unit 146-3b compares the input signal accumulated in step S514 with the third reference signal (S518), and when the integrated input signal is larger than the third reference signal, the driving unit 160 and the light emitting unit 170. Outputs a control signal capable of driving (S520). At this time, if the integrated input signal is smaller than the second reference signal, the integration start flag value is reset (S524), and the process is repeated from step S506.                     

On the other hand, the subtraction unit 142-3d subtracts the integrated value by a predetermined value when the time of integrating the input signal in step S5516 has passed a predetermined time (S522), and repeats steps S506-S516. When the control signal is output, the integration start flag value is reset (S524), and the process is repeated from step S506.

Finally, the intrusion detection operation for the large vibration performed by the third detection determination unit 146-4 will be described with reference to FIG. 6.

6 is a flowchart illustrating an operation process of a third detection determiner according to an exemplary embodiment of the present invention.

As shown in FIG. 6, the set value changed by the set value changing unit 148 is input before starting the algorithm according to the large vibration, and the set values in the third sensing determination unit 146-4 are changed (S602). Here, the set value refers to values preset in the microcomputer, that is, the fourth reference signal lamp. As described above, the setting value changing unit 148 changes and inputs setting values to match the algorithm performed by the second detection determining unit 146-3.

Then, the third detection determiner 146-4 performs an intrusion detection operation. The third comparator 146-4a receives the signal output from the second ADC 144 and compares it with the fourth reference signal (S604-S606). When the input signal is greater than the fourth reference signal, the output unit 146-4b outputs a control signal capable of driving the driving unit 160 and the light emitting unit 170 (S608). On the other hand, if the input signal is smaller than the fourth reference signal, steps S604-S606 are repeated.

Each intrusion detection method described above repeats the above-described steps at predetermined time intervals. For example, it may be performed at a time interval of about 1 msec.

As such, the vibration sensor according to an embodiment of the present invention uses a different intrusion detection method according to the strength of the vibration by extracting the magnitude of the signal using the internal ADC in the microcomputer and the intrusion detection result output from each intrusion detection method. To finally detect the intruder's intrusion. At this time, by changing the values set inside the microcomputer according to the material of the wall and applied to each intrusion detection method, the malfunction caused by the change of the vibration waveform according to noise and material is reduced.

In addition, the intrusion detection function of the vibration sensor according to the embodiment of the present invention described above may be implemented as a program and stored in a recording medium (CD-ROM, RAM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Can be.

The above embodiments are intended to illustrate the present invention, the scope of the present invention is not limited to the embodiments, it can be modified or modified by those skilled in the art within the scope of the invention defined by the appended claims.

As described above, according to the present invention, by changing and applying preset values in consideration of the external environment and installation conditions, in particular, the material of the wall, by using different intrusion detection method according to the magnitude of vibration by detecting the final intrusion Malfunctions can be minimized, which improves the efficiency of operation by reducing the number of unnecessary dispatches.

In addition, when detecting vibration, the LED output can be used to determine whether it is used for testing after initial installation.

Claims (18)

In the vibration sensor mounted on the wall to detect the vibration generated from the intruder to generate an alarm signal, A piezoelectric element for converting the magnitude of vibration generated from the intruder into an electrical signal; A first signal processor configured to process a signal output from the piezoelectric element to sense a vibration of a first magnitude and a vibration signal of a second magnitude greater than the first magnitude; A second signal processor configured to process a signal output from the piezoelectric element to detect a vibration signal having a third magnitude greater than the second magnitude; A material selection unit configured to transfer material information of the wall surface selected from a user; And Receives the wall material information, changes internal setting values, and performs intrusion detection corresponding to the first to third sizes based on the changed setting values, respectively, and corresponds to the first to third sizes, respectively. Microcomputer to detect the intrusion of the final intruder from the intrusion detection result Including; The microcomputer may change the setting value differently according to intrusion detection corresponding to the first to third sizes, respectively. The method of claim 1, The microcomputer, First and second analog-to-digital converters (ADCs) for converting signals output from the first and second signal processors into digital signals to extract signal magnitudes; A setting value changing unit which receives wall material information from the material selecting unit and changes a setting value in the microcomputer; And The intrusion is detected differently according to the vibration magnitudes corresponding to the signal magnitudes extracted from the first and second ADCs based on the changed set value, and finally, the combination of the respective intrusion detection results according to the vibration magnitudes is finally used. Control unit to detect intruder intrusion Vibration sensor comprising a. 3. The method of claim 2, The control unit, A signal discrimination unit classifying the first and second magnitude vibration signals from the signal magnitude extracted from the first ADC; A first detection determiner configured to detect an intrusion into the vibration signal of the first magnitude; A second detection determining unit detecting an intrusion into the vibration signal of the second magnitude; And A third detection determining unit detecting an intrusion into the vibration signal of the third magnitude Vibration sensor comprising a. delete The method of claim 3, The first detection determiner, A first comparator for receiving a signal output from the first ADC and comparing the signal with a first reference signal preset; A counter unit for increasing a count when the input signal is greater than the first reference signal and outputting an intrusion detection signal when the number of input counts increased for a preset time is greater than a preset count number; And A reset unit for resetting the input count value when the number of input counts is less than the set count number during the set time; Vibration sensor comprising a. The method of claim 3, The second detection determiner, A first comparator for receiving a signal output from the first ADC and comparing the signal with a first reference signal preset; An integration unit for integrating the input signal for a preset time when the input signal is greater than the first reference signal and outputting an intrusion detection signal when the integrated value is greater than the preset second reference signal; A subtraction unit for subtracting the integrated value when the integration time of the input signal has passed the set time; And A reset unit for resetting the intrusion detection signal when the intrusion detection signal is output or the integration result value is smaller than the second reference signal; Vibration sensor comprising a. The method of claim 3, The third detection determiner, A first comparator that receives a signal output from the second ADC and compares the first reference signal with a preset first reference signal; And An output unit for outputting an intrusion detection signal when the input signal is greater than the first reference signal Vibration sensor comprising a. The method according to any one of claims 1 to 3 or 5 to 7, A driver configured to generate the alarm signal when the intruder detects an intrusion; And A light emitting unit for emitting a light emitting element with the alarm signal Vibration sensor further comprising. The method according to any one of claims 1 to 3 or 5 to 7, Each of the first and second signal processors, An amplifier for amplifying the electric signal converted from the piezoelectric element; A filter unit to filter the amplified signal; And A detector for transmitting the filtered signal to the microcomputer Vibration sensor comprising a. The method of claim 9, And amplifying units of the first and second signal processing units have different amplification degrees. In the intrusion detection method of the vibration sensor mounted on the wall to detect the vibration generated from the intruder to generate an alarm signal, a) receiving material information of the wall surface from a user and changing preset values in the vibration sensor; b) pre-processing the signal generated from the intruder and classifying it by vibration magnitude; c) detecting an intrusion through a different algorithm according to the vibration magnitude based on the changed setting value; And d) detecting the final intrusion by combining the intrusion detection results according to the vibration magnitude, and outputting an alarm signal when the intrusion detection Including; The setting value is changed in accordance with the algorithm corresponding to the vibration magnitude intrusion detection method of the vibration sensor. delete The method of claim 11, Step b), Converting the magnitude of vibration generated from the intruder into an electrical signal; Amplifying the converted electrical signals with first and second amplification degrees, respectively; Extracting magnitudes from the signals amplified by the first and second amplification degrees; And Classifying a vibration magnitude from the magnitude of the extracted signal, wherein the vibration magnitude is classified into at least two of general vibration, fine vibration smaller than the general vibration, and vibration larger than the general vibration. Intrusion detection method of a vibration sensor comprising a. The method of claim 13, In the case of the fine vibration, the intrusion detection step, Comparing the input signal with a preset first reference signal; Integrating the input signal for a preset time when the input signal is greater than a first reference signal; Comparing the integrated value with a second preset reference signal Outputting an intrusion detection signal when the integrated value is greater than the second reference signal; And Resetting the integrated value when the intrusion detection signal is output or when the integrated value is smaller than the second reference signal during the preset time; Intrusion detection method of a vibration sensor comprising a. 15. The method of claim 14, Subtracting the integrated value by a predetermined value when the time for integrating the input signal has passed the set time; Intrusion detection method of the vibration sensor further comprising. The method of claim 13, In the case of the general vibration, the intrusion detection step, Comparing the input signal with a preset first reference signal; Incrementing a count when the input signal is greater than the first reference signal; Comparing the input count value increased for a preset time with a preset count value; Outputting an intrusion detection signal when the input count value is greater than the set count value; And Resetting the input count value when the input count value is less than the set count value. Intrusion detection method of a vibration sensor comprising a. The method of claim 13, In the case of vibration greater than the general vibration, the intrusion detection step, Comparing the input signal with a preset first reference signal; And Outputting an intrusion detection signal if the input signal is greater than the first reference signal Intrusion detection method of a vibration sensor comprising a. In the recording medium is recorded on the wall having a program having an intrusion detection function of the vibration sensor for detecting the vibration generated from the intruder to generate an alarm signal, a) a function of changing the preset values in the vibration sensor by receiving material information of the wall surface from a user; b) a function of pre-processing the signal generated from the intruder and classifying it by vibration magnitude; c) a function of detecting an intrusion through a different algorithm according to the vibration magnitude based on the changed setting value; And d) A function of detecting the final intrusion by combining the intrusion detection result according to the vibration magnitude, and outputs an alarm signal when the intrusion detection Including; And the set value is changed in accordance with an algorithm corresponding to the vibration magnitude.

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