JP2008191887A - Intrusion detection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intrusion detection device capable of detecting an intruder in small moves and with a high degree of detecting precision and fewer detection errors. <P>SOLUTION: The intrusion detection device has a pressure sensitive means 14 and a calculation means 152 for performing a calculation based on the output voltage of the pressure sensitive means 14 and outputting the calculation result. The pressure sensitive means 14 is mounted on a section which is likely to be touched by the intruder such as an upper surface of a wall-like structure, a handrail 12 or the like. The pressure sensitive means 14 is stored in a mounting section 13a and a movable section 13b. Upon the intrusion, the movable section bends, thereby deforming the pressure sensitive means 14 and outputting a voltage. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an intrusion detection device that receives contact or pressure and detects this.

  Conventionally, this type of intrusion detection apparatus uses a pressure sensor (see, for example, Patent Document 1). FIG. 11 is a cross-sectional view of a conventional intrusion detection device described in Patent Document 1. In FIG. FIG. 11 is a cross-sectional view of the fence, in which a pressure-sensitive sensor 10 is provided in a notch 9 formed along the house-side corner edge of the upper surface 8 of the fence 1. With the above configuration, when an intruder tries to invade over the fence 1 and a part of the body comes into contact with and presses the pressure sensor 10, the pressure sensor 10 detects the press and makes an intrusion determination. A crime prevention operation such as generating an alarm or reporting to the outside.

Further, the device described in Patent Document 2 has a base material attached to a fence headboard, a cover material attached to the upper surface of the base material so as to be movable up and down by pressing, and a switch and a biasing member between the base material and the cover material. When the cover material is pressed down, the switch enters and detects intrusion. As described in paragraph 0012, the switches are provided at predetermined intervals, the upper contact of the switch is provided on the cover material, and the lower contact of the switch is provided on the biasing member base. The contact is contacted to switch on. This is a mechanical switch. To detect intrusion, it is pressed with a load greater than a certain amount according to the elastic force of the urging member, and because the upper and lower contacts of the switch come into contact with the pressure, the stroke exceeds a certain distance. is required.
JP 2002-15380 A JP 2003-253917 A

  However, in the conventional configuration, a contact-type switch is used as a pressure-sensitive sensor, and the contact closes (or opens) when the weight including the weight of the intruder or the pressing force exceeds a certain value. For example, when a pressure sensor is installed on the balcony, when a person leans on the handrail of the balcony, vibrations due to rain, wind, etc., small animals such as cats and birds get on the intrusion detection device vigorously Even when the futon is dried and the intrusion detection device is hit with an umbrella or the like, even if it is not desired to be detected originally, there is a problem that the switch contact is reversed and erroneous detection is performed.

  The present invention solves the above-described conventional problems, and detects contact and pressure with certainty, and discriminates in detail between contact and pressure to be detected and contact and pressure not to be detected. It is another object of the present invention to provide a highly accurate intrusion detection device with fewer false detections by discriminating contact and pressure according to the purpose of use.

  In order to solve the above-described conventional problems, an intrusion detection device according to the present invention performs calculation based on pressure-sensitive means arranged to be deformed by contact or pressure, and an output signal of the pressure-sensitive means. And calculating means for determining the intruder's intrusion, wherein the calculating means determines whether the contact or the pressure is to be detected from the output signal of the pressure-sensitive means or is the contact or the pressure that is not to be detected. It is characterized by doing. Thereby, a contact state can be discriminate | determined in detail and the event which should be detected can be detected accurately.

  In the intrusion detection device of the present invention, contact and pressure can be reliably detected and discriminated in detail, and a determination output according to the purpose can be made to reduce false detections, thereby providing a highly accurate intrusion detection device.

  According to a first aspect of the present invention, there is provided pressure-sensitive means disposed so as to be deformed by contact or pressure, and calculation means for determining contact or pressure by performing calculation based on an output signal of the pressure-sensitive means. The calculating means includes integrating means for integrating the output signals of the pressure sensitive means, and peak value detecting means for detecting a peak value of the output signals of the pressure sensitive means, the integrating means, and the peak value It is characterized in that it is determined that there has been contact or pressure based on the value calculated by the detection means.

  As a result, it is possible to determine that there is contact or pressure by both the integrated value and the peak value of the output signal of the pressure-sensitive means, and it is possible to determine a more detailed contact state and to detect contact with high accuracy. It becomes possible.

  In the second invention, the calculation means stores an integration threshold value and a peak threshold value for determining that there has been contact or pressure, and the integration value integrated by the integration means exceeds the integration threshold value, and the peak value detection means When the peak value detected in (1) exceeds the peak threshold value, it is determined that contact or pressing has occurred.

  Thus, for example, in the case of a signal of an instantaneous fluctuation component such as static electricity, even if the output peak value exceeds the peak threshold value for determining contact or pressing, the integrated value of the output signal does not exceed the integration threshold value. , There is no false detection of contact or pressure.

  In addition, if a signal with minute fluctuation components continues due to light vibrations, etc., even if the integrated value of the output signal exceeds the integrated threshold value, the output peak value does not exceed the peak threshold value. There is no detection.

  In the third invention, the calculation means stores an integration threshold value for a predetermined peak value, and when the integration value integrated by the integration means exceeds the integration threshold value for the detected peak value, there has been contact or pressure. It was characterized by judging.

  Thereby, by providing an integrated threshold value corresponding to the detected peak value, the determination accuracy is improved by setting a threshold value for determining whether there has been a press or contact according to the determination purpose.

  In the fourth aspect of the invention, the initial determination threshold value is stored, and when the output signal of the pressure-sensitive means exceeds the initial determination threshold value, the integration of the integration means and the peak detection of the peak value detection means can be started. As a result, the threshold of the output level for starting various calculations for determining whether or not there is contact or pressing is clarified, and it is possible to determine whether or not there is stable contact or pressing by calculating from this point. An intrusion detection device can be realized.

  The fifth invention has threshold adjustment means for adjusting the initial determination threshold value, the integration threshold value, and the peak threshold value, so that the value can be adjusted according to the installation situation and the user's application, so that the invasion is highly convenient. A detection device can be realized.

A sixth invention is an intrusion detection device according to any one of the first to fifth inventions, wherein the output voltage of the pressure sensing means is output to the calculation means via the detection means. That is, the output signal from the pressure sensing means is filtered by the detection means with a predetermined filtering characteristic, or amplified with a predetermined amplification degree. The detection level adjustment means that performs these adjustments amplifies and transmits even the output of the pressure-sensitive means even if it is a minute voltage, as well as the conditions of the installation location of the device, the weather conditions, and the user's needs It is possible to perform the calculation with an appropriate signal level by finely adjusting the characteristics and amplification of the filtering and the voltage level.

  A seventh invention is an intrusion detection device according to any one of the first to sixth inventions, which uses a flexible cable-like piezoelectric sensor as a pressure-sensitive means. Accordingly, the determination is made based on the voltage level generated not by the load but by the deflection of the piezoelectric sensor due to the displacement due to the contact or pressing. In addition, since it is not a conventional two-point contact type switch, it is easy to install.

  According to an eighth invention, in the first to seventh inventions, the pressure-sensitive means is disposed on the wall-like structure so as to be deformed by contact or pressing by an intruder. This makes it possible for an intruder to attach to a wall-like structure, for example, a surface that can be contacted by humans on or near the upper surface of a fence, fence, fence, balcony wall, handrail, etc. It is possible to do. This makes it possible to detect contact or pressing in front of a house, such as a fence, fence, fence, terrace or balcony handrail.

  The ninth invention is a program for executing at least a part of the functions of the intrusion detection devices of the first to eighth inventions by a computer. Since it is a program, it is possible to easily realize at least a part of the intrusion detection apparatus of the present invention by cooperating hardware resources such as an electric / information device, a computer, and a server. In addition, the program can be distributed / updated and installed easily by recording on a recording medium or distributing the program using a communication line.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
A case where the intrusion detection device according to the first embodiment of the present invention is attached to a wall-like structure will be described. Fig.1 (a) is a block diagram of the wall-shaped structure which installed the intrusion detection apparatus, FIG.1 (b) is sectional drawing in the AA position of Fig.1 (a). In FIG. 1A, reference numeral 11 denotes a wall-like structure such as a house veranda, balcony fence, fence, fence surrounding a site, and 12 is a handrail installed on the upper part of the wall-like structure 11. The handrail 12 may be omitted. Reference numeral 13 a denotes a mounting portion, and reference numeral 13 b denotes a movable portion made of metal, resin, or wood, and the mounting portion 13 a is attached to the handrail 12. When there is no handrail 12, it attaches to the wall-shaped structure 11. FIG. What is necessary is just to attach so that a movable part may become an upper end part, such as a fence and a fence. The number of mounting parts 13a is not limited to one, and a plurality of types of parts may be arranged or stacked so as to be easily attached to the wall-like structure 11 or the handrail 12, and only needs to be stably attached to the upper end. . Here, the mounting portion 13a is of one type.

  As shown in FIG.1 (b), 14 is accommodated in the place formed with the mounting part 13a and the movable part 13b with the piezoelectric sensor (pressure-sensitive means). The piezoelectric sensor 14 has a flexible cable shape as pressure-sensitive means. Reference numeral 16 denotes support means, and the piezoelectric sensor 14 is supported by support means 16 made of an elastic body softer than the piezoelectric sensor 14. The support means 16 may be omitted. Here, the piezoelectric sensor 14 has a structure in which a slit is provided in a part of the support means 16 and is fitted into the support means 16 from the slit. In the present embodiment, a synthetic resin foam such as EPDM or a thermoplastic elastomer is used as the elastic body, and the hardness, foam ratio, etc. are set so that the compression rate (load value causing unit displacement) is smaller than that of the piezoelectric sensor 14. Selected. A non-linear bending portion 17 and a pressing member 18 are provided in the vicinity of or adjacent to the piezoelectric sensor 14 and the support means 16. Thereby, the piezoelectric sensor 14 is configured to be easily deformed. Details of the configuration in the vicinity of the piezoelectric sensor 14, the support means 16, and the pressing member 18 will be described later. The arrangement configuration is not limited to that shown in FIG.

  As shown in FIG. 1A, reference numeral 15 denotes a control unit, which is disposed at the end of the piezoelectric sensor 14. Reference numeral 19 denotes a communication cable, which transmits a signal from a communication means in the control unit 15 to the outside although not shown. The communication means may be wireless communication without the cable 19.

  2A is a configuration diagram of the piezoelectric sensor 14 and the control unit 15, and FIG. 2B is a cross-sectional view taken along the line BB in FIG. 2A. In FIG. 2A, the piezoelectric sensor 14 includes a tip portion 141 in which a resistor for detecting disconnection / short-circuiting of electrodes is incorporated. 2B, the piezoelectric sensor 14 includes a central electrode 142 made of a conductor, a piezoelectric layer 143, an outer electrode 144 made of a conductor, and a coating layer 145 made of an elastic body. Although it is conceivable to use a resin-based polymer piezoelectric material such as polyvinylidene fluoride as the piezoelectric layer 143, the heat-resistant temperature is about 80 ° C. at the upper limit, and the intrusion detection device is mainly used outdoors, especially in summer. In such a case, the surface temperature of the wall-like structure 11 sometimes becomes a high temperature close to 100 ° C. due to direct sunlight. As the piezoelectric layer 143, when a composite piezoelectric body in which a piezoelectric ceramic powder is mixed in a specific resin base material can be used, it can have a high temperature durability of 100 ° C. or higher. Is preferred.

  FIG. 3 is a detailed view of a cross-sectional view corresponding to the AA cross section of FIG. 1A of the intrusion detection device according to the first embodiment of the present invention, and FIGS. 4A and 4B are C- It is C sectional drawing. First, the intrusion detection apparatus according to the first embodiment will be described with reference to FIGS. 3 and 4A. 3 and 4A, 12 is a handrail of a wall-like structure, 13a is a mounting portion, 13b is a movable portion and is made of metal, resin, wood, or the like. The space formed by the mounting portion 13a and the movable portion 13b accommodates the piezoelectric sensor 14 and the support means 16. The space formed by the mounting portion 13a and the movable portion 13b is preferably sealed in consideration of the conditions for installation outdoors, but may not necessarily be sealed as long as it is configured to prevent intrusion of dust and water droplets. The mounting portion 13a and the movable portion 13b are bent inwardly in a U-shape, overlapped so that the mounting portion 13a is partially covered by the movable portion 13b, and the both side end portions of the U-shape. Some agree with each other. By fitting as shown in FIG. 3, the movement of the movable portion 13b is restricted, and a reliable movement is realized. Even if the pressing force F is applied from above, the operating distance of the movable portion 13b is constant, and the pressing force applied to the piezoelectric sensor 14 can be constant. Further, the fitting portion is not limited to the configuration as shown in FIG. Reference numerals 20 and 21 denote fixing means for fixing the mounting portion 13a to the handrail. The fixing method is screwing here, but a method using a string-like fastening part, a method using a screw and a nut, adhesion, or fixing by fitting may be used.

  The non-linear bending portion 17 is composed of a mechanism or a material that uses a solid, hollow, spring, or the like, and has a non-linear deformation amount due to pressing. It is easy to deform. And it is enclosed in the inside of the support means 16, or is comprised adjacent to the support means 16 with another component. The pressing member 18 is made of metal, resin, or wood, and is a material or mechanism that is more difficult to deform than the support means 16. The pressing member 18 is provided at a position where force is applied to the piezoelectric sensor 14 via the support means 16. That is, when the intruder presses the movable portion 13b, the pressing member 18 is pressed by the force, and the pressing member 18 deflects the support means 16 and the piezoelectric sensor 14. At this time, the support means 16 and the piezoelectric sensor 14 push the non-linear bending portion 17 that is more easily deformed than the support means 16, and the mechanism is more easily deformed than pushing the support means 16. As described above, the intruder can be detected by bending the piezoelectric sensor 14. Further, as shown in FIG. 4A, the pressing member 18 has a R surface here so that pressure is easily applied to the support means 16 and the piezoelectric sensor 14. This may be configured with an acute angle or an obtuse angle. Of course, it may be flat. Moreover, the pressing member 18 is arrange | positioned at intervals. Thereby, since only the supporting means 16 and the piezoelectric sensor 14 in the vicinity pressed by the intruder are locally bent as compared with others, the voltage is surely output and the detection is further facilitated. Note that the non-linear bending portion 17 and the pressing member 18 may be omitted. FIG. 4B is a configuration diagram illustrating a state in which the piezoelectric sensor 14 or the like is bent when the pressure F is applied.

  FIG. 5 is a block diagram of the intrusion detection device according to the first embodiment of the present invention. In FIG. 5, the control unit 15 includes a detection unit 151, a calculation unit 152, and a notification unit 30. The notification unit 30 includes, for example, a communication unit that performs communication with others and a threatening unit that performs sound, light, and display for threatening. Here, communication means and threatening means are not shown. The detection unit 151 includes a filter unit 1511 that filters the output signal from the piezoelectric sensor 14 with a predetermined filtering characteristic, an amplifier unit 1512 that performs amplification with a predetermined amplification degree, and a detection level adjustment that can change the characteristics and amplification factor of the filter. Means 1513 are provided. As the filtering characteristics of the filter unit 1511, the frequency when the intruder's hand is in contact is 10 Hz or less, particularly in the range of 3 to 8 Hz, the vibration due to rain is 10 Hz or more, and the vibration due to wind is 1 Hz or less. As the filtering characteristics, for example, a band-pass filter that passes a signal component of 3 to 8 Hz is used. The computing unit 152 includes a memory unit 1521, a timer unit 1522, an initial determination unit 1523, a peak value detection unit 1524, a threshold adjustment unit 1525, an integration unit 1526, and an intrusion determination unit 1527.

  The operation and action of the intrusion detection apparatus configured as described above will be described below with reference to FIGS. 6, 7, and 8. FIG. 6 shows that when an intruder gets over the wall-like structure 11 and enters the wall-like structure 11, the upper part of the wall-like structure 11 is touched to lift the body, and the output voltage of the piezoelectric sensor 14 when the intruder intrudes is filtered. 1511, the signal V output through the amplifier 1512, the value obtained by integrating the output signal V from the detection means 151 by the integration means 1526, the value obtained by detecting the peak value of the output signal V from the detection means 151, and the integration FIG. 10 is a characteristic diagram illustrating a change with time of an output signal K output from the intrusion determination unit 1527 to the notification unit 30 when both the measured value and the peak value exceed a threshold value. First, when an intruder places his / her hand on the movable part 13 b attached to the handrail 12 of the wall-like structure 11, the movable part bends by pressing with a finger, and the deformation is applied to the piezoelectric sensor 14 and the support means 16. Since the support means 16 is more flexible than the piezoelectric sensor 14, the support means 16 is compressed by the pressure of the finger contact, and the piezoelectric sensor 14 is also easily deformed. The deformation of the piezoelectric sensor 14 starts at time T0 in FIG. 6, and a signal corresponding to the acceleration of deformation of the piezoelectric sensor 14 is output from the piezoelectric sensor 14 due to the piezoelectric effect.

  In the conventional configuration, when the cover material of the handrail cap is subjected to a load and moved with a large stroke, it is not preferable for intrusion detection because an intruder can easily notice. Further, when a user who is not an intruder leans on, especially when the user is at a high position such as a balcony, anxiety may be given. However, the configuration of the intrusion detection device according to the first embodiment can be achieved even with a small stroke. The pressure-sensitive means can be reliably detected, and it is difficult for an intruder to notice it, giving the user a sense of security.

The output signal of the piezoelectric sensor 14 passes a signal of 3 to 8 Hz, which is a frequency band at the time of hand contact, by the filter unit 1511, and signals of other frequency bands are removed. At the time of hand contact, a signal component larger than the reference potential V ₀ appears in V. At this time, if the piezoelectric sensor 14 is attached to the upper portion of the handrail 12 of the wall-like structure 11, the deformation of the piezoelectric sensor 14 at the time of hand contact is slight, but in this embodiment, Since the support means 16 is made of an elastic body that is more flexible than the piezoelectric sensor 14 and the support means 16 is easily compressed upon contact, the movable portion 13b can be slid downward, or the pressure received by the movable portion 13b. The surface is bent and the deformation amount of the piezoelectric sensor 14 is increased. Further, the non-linear bending portion 17 is made of a material or configuration that is easier to deform than the support means 16, and the pressing member 18 is made of a material or structure that is harder to deform than the support means 16, so that the pressing member 18 can press the hand. 14, the piezoelectric sensor 14 bends in response to the displacement. Further, the non-linear bending portion 17 is deformed upon receiving a pressure, the sliding movement of the movable portion 13b increases, and the amount of change due to the bending of the piezoelectric sensor 14 increases. FIG. 4B shows a situation in which when the hand presses the movable portion 13b, the pressing member 18 transmits to the piezoelectric sensor 14, the piezoelectric sensor 14 bends, and the nonlinear bending portion 17 accelerates the progress of the bending. Thus, the piezoelectric sensor 14 can obtain a large amount of deformation, the acceleration that is the second derivative value of the amount of deformation increases, and as a result, the output signal of the piezoelectric sensor 14 also increases.

When the calculation unit does not perform calculation and the amplitude | V−V ₀ | from V ₀ of the output voltage V from the piezoelectric sensor 14 exceeds D ₀ (initial determination threshold), the initial determination unit 1523 Determines that a part of the body is in contact, and the accumulating unit 1526 accumulates values of | V−V ₀ |. When the output voltage V is V ₀ or less, the value of | V ₀ −V | is integrated. Similarly, when the peak value detection, and starts the detection of the peak value at time t _0. Here, after the detection of the peak value is started, the peak P0 is first detected, and then the peak P1 exceeding the peak P0 is detected.

In this embodiment, starts integrating the peak detected at time t ₀ in FIG. 6, but the integrated value at time t ₁ is over the integrated threshold (I), intrusion judging unit 1527 peak value detected, Since the peak threshold value has not been exceeded, determination output is not performed yet. Since the peak value detected at time t ₂ exceeds the peak threshold (J), the intrusion determination unit 1527 outputs a pulse signal of Lo → Hi → Lo as a determination output at time t ₂ . Similarly, when the peak value exceeds the peak threshold and the integrated value does not exceed the integrated threshold, the determination output is not performed, and the determination output is performed when the integrated value exceeds the integrated threshold. Thus, the voltage detected by the filter unit 1511 is amplified by the amplifier 1512 and transmitted from the detection unit 151 to the calculation unit 152, and the calculation unit determines intrusion.

  FIG. 7 shows the output voltage of the piezoelectric sensor 14 when the wall-like structure 11 is shaken by strong wind or the like. Since the vibration is transmitted to the piezoelectric sensor 14, the output voltage of the same level is continuously generated. In this case, since the output voltage is continuously generated, the integrated value exceeds the integrated threshold value (I). However, since the piezoelectric sensor is not directly deformed, the maximum peak value P0 is low and the output level is low. J) is not exceeded, no determination output is made, and no intrusion is determined due to strong wind or the like.

  FIG. 8 shows the output voltage of the piezoelectric sensor 14 generated by noise such as static electricity. In this case, the output level of the peak value P0 is high and exceeds the peak threshold (J), but the value obtained by integrating the output voltage is small and does not exceed the integration threshold (I). It is not determined as intrusion due to noise or the like.

  In this way, it is possible to discriminate both from the output voltage of the sensor generated due to intrusion and other factors.

Next, the movement in the calculation means 152 and its periphery is demonstrated using FIG. The potential generated by the piezoelectric sensor 14 is transmitted to the calculation unit 152 via the filter unit 1511 of the detection unit 151 and the amplifier 1512. In the calculation means 152, an initial determination threshold value, an integration threshold value, and a peak threshold value are stored in the memory means 1521. The initial comparison unit 1523 compares the input voltage of the computing means 152 with the initial determination threshold value, and determines whether the initial determination threshold value is exceeded (STEP 1). If it is determined that the initial determination threshold value is exceeded, the process proceeds to the next step (STEP 2). The comparison by the initial comparison unit 1523 is performed at the timing counted by the timer unit 1522. This eliminates the loss of comparison. When it is determined that the initial determination threshold value is exceeded, the timer unit 1522 starts the first time measurement, and the integration unit 1526 starts integration of the input voltage of the calculation unit 152. The peak detection means 1524 also solves the input voltage peak value detection. (STEP3). Up to this point, the starting point of the intrusion detection calculation is determined, and the intrusion detection calculation is performed from this point. Next, it is determined whether a predetermined time has elapsed since the start of the first time measurement (STEP 4). Here, when a predetermined time has elapsed, the time measurement is stopped and the integrated value and the peak value are cleared (STEP 5). If the predetermined time has not passed in (STEP 4), the intrusion determination unit 1527 compares whether the integrated value does not exceed the integrated threshold value in (STEP 6) or the peak value does not exceed the peak threshold value. If the value exceeds the threshold value, it is determined that it is an intrusion, and the determination result is output to the notification unit 30. The notification unit 30 receives the determination result and generates an alarm sound and light for a predetermined time to threaten the intruder. The threat here does not have to be this. In parallel, the communication means notifies an appropriate place such as an indoor alarm terminal, external telephone, security company, police, etc. (STEP 7).

  In the present embodiment, the calculation is performed using the analog output signal from the piezoelectric sensor. However, even when another contact type switch is used, the calculation can be performed using the calculation processing of the present embodiment. It is.

  In addition, the detection level adjustment unit 1513 can adjust the detection level from the detection unit 151 and can be adjusted by the user according to the installation status and the like. Further, the threshold value adjusting means 1525 can change the threshold values for various determinations stored in the memory means 1521 and the first time measured by the timer means 1522. Various determination thresholds and the time measured by the timer means 1522 can be optimized according to the situation of the installation site of the intrusion detection device and the detection target. For example, if the microcomputer is configured to make the determination, intrusion detection can be arbitrarily changed and useful development can be expected if the microcomputer program adjusts the value of the determination area and the voltage comparison cycle, that is, the timekeeping time. A device can be realized.

  Furthermore, in the present embodiment, the period from the start to the end of the first time measurement is the effective time for the integrated value and the peak value detection, but the time for performing the integration or the time for detecting the peak value is changed respectively. The start and end timings can be made different, and can be set appropriately according to the detection purpose. By doing so, it becomes possible to detect intrusion in detail, and the convenience as an intrusion detection device is enhanced.

  FIG. 10 shows a determination region in which a determination output is made when an integration threshold value for a predetermined peak value is set and the integration value integrated by the integration means exceeds the integration threshold value for the detected peak value. Thereby, when the peak value J1 is detected, if the integration threshold is equal to or greater than I1, a determination output is performed. Similarly, when the peak value J2 or J3 is detected, the determination output is performed when the integrated threshold is I2 or more, or I3 or more. Thereby, it can set suitably according to the detection objective and can perform intrusion detection finely.

  As described above, the intrusion detection apparatus according to the present invention can provide an intrusion detection apparatus that can detect an intruder with a small amount of movement, and that does not detect false detections, that is, does not detect under conditions that are not desired to be detected. In addition, it can be used by installing it on wall structures of various shapes laid on outdoor sites such as houses, factories, railways, airports, etc. It can also be installed on the back side of the door handle, etc., and it can also be used as a system to notify the unauthorized use by issuing an alarm or intimidating when trying to open the drawer or door illegally Applicable.

(A) Configuration diagram of a wall-like structure in an embodiment of the present invention (b) Cross-sectional view at the AA position (A) Configuration diagram of piezoelectric sensor 14 and control unit 15 in Embodiment 1 of the present invention (b) Cross-sectional view at the BB position Sectional drawing of the cutting direction of the package of the intrusion detection apparatus in embodiment of this invention Sectional drawing of the longitudinal direction of the package of the intrusion detection apparatus in embodiment of this invention Sectional view of the intruder pushing in the same longitudinal direction Block diagram of the intrusion detection device in Embodiment 1 of the present invention In the intrusion detection device according to the first embodiment of the present invention, the output signal V when an intruder enters, the integrated value of the integrating means, the peak value of the peak detecting means, and the change over time of the output signal K of the intrusion determining unit Characteristic diagram showing In the intrusion detection device according to the first embodiment of the present invention, the output signal V when strong wind or the like occurs, the integrated value of the integrating means, the peak value of the peak detecting means, and the change over time of the output signal K of the intrusion determining unit Characteristic diagram showing In the intrusion detection device according to the first embodiment of the present invention, the output signal V when noise due to static electricity or the like occurs, the integrated value of the integrating means, the peak value of the peak detecting means, and the output signal K of the intrusion determining section Characteristic diagram showing changes over time Flow chart of computing means in Embodiment 1 of the present invention FIG. 3 is a determination area diagram showing an integration threshold corresponding to the peak value in the first embodiment of the present invention. Sectional view of another conventional intrusion detection device

Explanation of symbols

11 Fence (wall-like structure)
12 Handrail 13a Mounting part 13b Movable part 14 Piezoelectric sensor (pressure sensitive means)
DESCRIPTION OF SYMBOLS 15 Control unit 16 Support means 17 Nonlinear bending part 18 Pressing part 30 Notification part 151 Detection means 152 Calculation means 1521 Memory means 1522 Timer means 1523 Initial determination part 1524 Peak value detection means 1525 Threshold adjustment means 1526 Accumulation means 1527 Intrusion determination part

Claims (9)

Pressure-sensitive means disposed so as to be deformed by contact or pressing, and calculating means for determining contact or pressing by performing calculation based on an output signal of the pressure-sensitive means, An integration means for integrating the output signal of the pressure sensing means; and a peak value detection means for detecting a peak value of the output signal of the pressure sensing means; the integrated value calculated by the integration means; and the peak An intrusion detection apparatus that determines that a contact or a press has occurred based on a peak value calculated by a value detection means. The calculation means stores the integration threshold value and the peak threshold value. When the integration value integrated by the integration means exceeds the integration threshold value and the peak value detected by the peak value detection means exceeds the peak threshold value, the calculation means The intrusion detection apparatus according to claim 1, wherein the intrusion detection apparatus determines that there is a press. The calculating means stores an integration threshold value for a predetermined peak value, and determines that there has been contact or pressure when the integrated value integrated by the integration means exceeds the integration threshold value for the detected peak value. The described intrusion detection device. The calculation means stores an initial determination threshold value, and starts integration of the integration means and peak detection of the peak value detection means when the output signal of the pressure-sensitive means exceeds the initial determination threshold value. The intrusion detection device according to item. The intrusion detection device according to any one of claims 1 to 3, wherein the calculation unit includes a threshold adjustment unit that adjusts an initial determination threshold, an integration threshold, and a peak threshold. 6. The method according to claim 1, further comprising detection level adjusting means for adjusting a detection level of an output signal of the pressure sensitive means, wherein the output signal of the pressure sensitive means is output to the arithmetic means via the detecting means. Intrusion detection device. The intrusion detection device according to any one of claims 1 to 6, wherein a cable-shaped piezoelectric sensor having flexibility is used as the pressure-sensitive means. The intrusion detection device according to any one of claims 1 to 7, wherein the pressure-sensitive means is disposed on the wall-like structure. The program for making a computer perform at least one part of the function of the intrusion detection apparatus of any one of Claim 1 to 8.