JP2007058362A - 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 has high detecting accuracy with fewer erroneous detection. <P>SOLUTION: The intrusion detection device has a pressure sensitive means 14 and a calculating means 152 for calculation on the basis of output voltage of the pressure sensitive means 14 to output calculated results. The pressure sensitive means 14 is a means to be mounted on a section 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 movable section 13b, and outputs voltage so that the pressure sensitive means 14 is deformed by bending the movable section at the intrusion. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an intrusion detection device installed on a wall-like structure such as a veranda, a balcony, a fence, or a fence.

  Conventionally, this type of intrusion detection apparatus uses an infrared sensor or a pressure-sensitive sensor (for example, see Patent Document 1).

  FIG. 13 is a cross-sectional view of another conventional intrusion detection device described in Patent Document 1. In FIG. FIG. 13 is a cross-sectional view of the fence 1, in which a pressure-sensitive sensor 10 is disposed in a notch 9 formed along a 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. The switches are provided at predetermined intervals (as in paragraph [0012]), and 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. In this configuration, the upper and lower contacts of the switch come into contact with each other. 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 switch is used as a pressure-sensitive sensor, and the contact is closed (or opened) when the weight including the weight of the intruder or the pressing force exceeds a certain value. Even if a small animal such as a cat or a bird is riding on the intrusion detection device vigorously, when a futon is dried, or when an intrusion detection device is struck with an umbrella, etc. When the weight exceeds a certain value, there is a problem that the switch contact is reversed and erroneously detected.

  Further, in the above-described conventional configuration, if the cover material of the balustrade of the handrail receives a load and moves with a large stroke in order to open or close the switch contact, it is not preferable for intrusion detection because an intruder can easily notice. In addition, when a user who is not an intruder leans, anxiety may be given particularly when the user is at a high position such as a balcony.

  The present invention solves the above-described conventional problems, and provides an intrusion detection device that can detect an intruder with a small movement that is not recognized and has few false detections, that is, does not detect under conditions that do not want to be detected. With the goal.

  In order to solve the above-described conventional problems, an intrusion detection device according to the present invention includes a pressure-sensitive means disposed so as to be deformed by contact or pressure when an intruder enters, and an output voltage of the pressure-sensitive means. And calculating means for outputting a result of the calculation, the calculating means having a memory means, a voltage integrating means, an initial comparing means, and one or a plurality of notification comparing means, and the memory means has an initial judgment value and 1 or When there are a plurality of judgment values, the initial comparison means compares the output voltage of the pressure sensing means with the initial judgment value, and when it is judged that the output voltage of the pressure sensing means is larger, the voltage integrating means outputs the output voltage of the pressure sensing means. The one or more notification comparison means compares the integrated value of the output voltage of the pressure sensing means with one or more determination values corresponding to each of the one or more notification comparison means, and the integrated value When it is determined that is greater, Stage is for each of the one or more notification comparing means has an intrusion detection device for performing an output indicative of the result of calculation. As a result, when the pressure sensing means is deformed upon contact or pressing by an intruder and outputs a voltage, if the output is larger than the initial determination value, the voltage integrating means performs integration.

  Since the determination is performed with various determination values based on the integrated values here, a noisy signal is not erroneously detected with an instantaneous fluctuation component. In addition, since the determination is performed using a plurality of determination values, it is possible to perform a determination at a plurality of levels or with different meanings.

  The intrusion detection device of the present invention detects intrusion by comparing the output voltage of the pressure-sensitive means with a determination value based on a value obtained by integrating the output voltage for an arbitrary time, and eliminates an instantaneously generated noise signal. In addition to improving the accuracy of the judgment, it is possible to detect the situation by dividing it into multiple levels by combining multiple judgment values and timekeeping time, making it possible to detect more detailed and convenient. improves.

  According to a first aspect of the present invention, when an intruder invades, pressure sensing means arranged to be deformed by contact or pressing pressure, and computation is performed based on an output voltage of the pressure sensing means, and a computation result is output. The computing means has a memory means, a voltage integrating means, an initial comparing means, and one or more notification comparing means, and has an initial judgment value and one or more judgment values in the memory means, The initial comparing means compares the output voltage of the pressure sensitive means with the initial determination value, and when it is determined that the output voltage of the pressure sensitive means is larger, the voltage integrating means integrates the output voltage of the pressure sensitive means. The one or more notification comparison means compares the integrated value of the output voltage of the pressure sensitive means with the one or more determination values corresponding to each of the one or more notification comparison means, and the integration When it is determined that the value is larger The calculation means, each of said one or more notification comparing means is adapted to detect an intrusion and outputs the result of the calculation. Thus, instead of detecting an intruder by opening or closing a switch built in the intrusion detection device, the presence or absence of an intruder is determined by the voltage level of the voltage output by the pressure sensing means and the value obtained by integrating the voltage on the time axis. In order to perform the determination, a plurality of state determinations can be made by providing a plurality of threshold values for the voltage level. In addition, various types of judgments such as calculation of voltage transition combinations can be performed, and it does not react even when voltage is generated due to instantaneous force applied, but reacts when a certain time force is applied. A threshold value can be set for the intruder detection apparatus that detects only when there is an intruder.

  For example, for example, when a small animal such as a cat or bird rides on an intrusion detection device vigorously, when a futon is dried, or when an intrusion detection device is hit with an umbrella, etc. An intrusion detection device with few false detections can be realized and is extremely effective.

According to a second invention, in particular, in the first invention, the computing means has a timer means, and the voltage integrating means reliably integrates the output voltage of the pressure sensitive means at any time counted by the timer means. A device can be realized. As a result, the data for each sampling interval is referred to and integrated during an arbitrary time, so that the data can be captured at the correct time interval.

  According to a third aspect of the invention, in particular, in the invention according to any one of the first to second aspects, the voltage integrating means captures the output voltage of the pressure sensitive means at an arbitrary time interval during an arbitrary time measured by the timer means. Since the output voltage of the pressure sensing means is integrated, the integrated value in an arbitrary time unit can be obtained correctly.

  According to a fourth aspect of the present invention, there is provided a pressure sensing means and a computing means for computing based on an output voltage of the pressure sensing means and outputting a computation result, the computing means comprising a memory means, a timer means, a voltage integrating means, an initial value Comparing means, first notice comparing means, and second notice comparing means, the memory means having an initial judgment value, a first judgment value, and a second judgment value, wherein the initial comparison means is pressure sensitive means. When the output voltage of the pressure sensing means is determined to be larger, the timer means starts the first time measurement, and the first notification comparison means in the previous period When the integrating means compares the integrated value obtained by integrating the output voltage of the pressure-sensitive means with the first determination value, and determines that the integrated value of the voltage integrating means is greater by the end of the first timing. The first notification information is output, and the timer means is at the end of the first timekeeping. The second timing comparison means starts comparing the second determination value with the integrated value obtained by integrating the output voltage of the pressure sensing means by the voltage integrating means. When it is determined that the integrated value of the voltage integrating means is larger by the end time, an intrusion detection device that outputs second notification information can be realized. Thereby, by having the first and second notification comparison means and the corresponding determination values, the determination in two steps based on the voltage and time is performed, so that the accuracy of the determination of intrusion presence / absence can be improved. it can.

  In a fifth aspect of the present invention, particularly in the fourth aspect, during the first timing, when the first notification comparison unit determines that the integrated value of the voltage integrating unit is larger than the first determination value, The intrusion detection device ends the first timekeeping. As a result, when the voltage exceeds the threshold determined by the first notification comparing means and the corresponding determination value, the determination result is output immediately after the predetermined time has elapsed, instead of proceeding to the next determination. By moving to the second stage determination, an intrusion detection device that can quickly and reliably determine whether or not an intrusion has occurred can be realized.

  According to a sixth aspect of the invention, in particular, in the invention according to any one of the fourth to fifth aspects of the invention, the calculation means has a third notification comparison means, the memory means has a third judgment value, and the initial comparison means is sensitive. When the output voltage of the pressure means is compared with the initial determination value and it is determined that the output voltage of the pressure sensitive means is larger, the timer means starts the third time measurement, and the third notification comparison means in the previous period The voltage integrating means compares the integrated value obtained by integrating the output voltage of the pressure sensing means with the third determination value, and determines that the integrated value of the voltage integrating means is greater by the end of the third time measurement. Sometimes an intrusion detection device that outputs third notification information can be realized. Thus, after the determination by the first notification comparison unit, the determination by the second notification comparison unit is performed, and at the same time, the determination by the third notification comparison unit is also performed in parallel. That is, when double determination is performed in parallel and the first and second notification comparison units and the corresponding determination values are used, the third notification comparison unit and the corresponding determination value are exceeded. Can realize an intrusion detection device capable of performing its own output.

  In the seventh aspect of the invention, in particular, in the sixth aspect of the invention, the start and end of the third time measurement are equal to the start and end of the first time measurement. Thus, since the determination by the third notification comparison unit is performed within the determination time performed by the first notification comparison unit, the determination based on the third determination value different from the first determination value can be performed. In other words, it is possible to detect intrusions at two types of alert levels at the same time and perform detailed notification.

According to an eighth aspect of the present invention, in the sixth aspect of the invention, the third timekeeping time is equal to the total time of the first timekeeping time and the second timekeeping time. The second time measurement continuously performed and the third time measurement are performed in parallel. Thus, intrusion is detected in parallel based on the third determination value different from the first determination value and the second determination value throughout the total determination time performed by the first and second notification comparing means. Output. That is, it is possible to always detect intrusions at two types of alert levels and perform detailed notification.

  According to a ninth aspect, in the invention according to any one of the sixth to eighth aspects, the third determination value is equal to the second determination value. Thereby, the intrusion detection apparatus which can determine the presence or absence of intrusion when the second determination value is exceeded through the first time measurement and the second time measurement can be realized. For example, in the case where the second determination value is higher than the first determination value, the determination level is lower than the first determination level. The third determination value can be determined at the same high alert level as the second determination value, and can be determined at two levels at the same time.

  According to a tenth aspect of the present invention, in the invention according to any one of the fourth to ninth aspects, at least one of the second timekeeping and the third timekeeping is an intrusion that clears the accumulated value of the voltage integrating means when the timekeeping ends. A detection device can be realized. As a result, an intrusion detection device that does not react by integration of voltages generated by slight vibrations due to the passage of time can be realized. Since the determination value stored in the memory means is set in advance on the premise that the voltage value integrated for each time unit is determined, it is cleared for each time and the integrated value is accurately determined.

  In an eleventh aspect of the invention according to any one of the fourth to tenth aspects of the invention, at least one of the second timekeeping and the third timekeeping outputs the second notification information or the third notification information. In this case, an intrusion detection device that clears the integrated value of the integrating means can be realized. By clearing the integrated value at the timing when each determination is output, the measurement in the next time unit is not affected. When the intruder is determined, the next time measurement is started in preparation for the next intruder, that is, the detection is started, so that an intrusion detection apparatus that performs detection more quickly can be realized.

  In a twelfth aspect based on any one of the fourth to eleventh aspects, the first notification comparing means compares the first determination value with the integrated value obtained by integrating the output voltage of the pressure sensing means by the voltage integrating means. And when it cannot be determined that the output value of the voltage integrating means is larger by the end of the first time measurement, an intrusion detection device that clears the integrated value of the voltage integrating means can be realized. As a result, if it is determined that the person is not an intruder, an intrusion detection apparatus that starts detection immediately in preparation for the next intruder can be realized.

  A thirteenth aspect of the invention is the intrusion detection device according to any one of the first to twelfth aspects of the invention, 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. As a result, even if the output of the pressure sensing means is a minute voltage, it can be amplified and transmitted, the conditions of the installation location, the weather conditions, the characteristics of the filtering, the amplification, and the voltage level as required by the user. Fine adjustments can be made to perform intrusion detection calculations at an appropriate level.

  A fourteenth invention is an intrusion detection device using a flexible cable-like piezoelectric sensor as a pressure-sensitive means in the invention according to any one of the first to thirteenth inventions. Thus, the determination is made based on the voltage level generated not by the weight but by the deflection of the piezoelectric sensor due to the displacement of the intruder. Since it is not a conventional two-point contact type switch, it is easy to install.

In a fifteenth aspect of the invention according to any one of the first to fourteenth aspects, 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 intrusions before entering the dwelling, such as fences, fences, fences, terraces and balcony railings.

  The sixteenth invention is a program for executing at least a part of the functions of the intrusion detection device 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)
FIG. 1A is a configuration diagram of a wall-like structure in which an intrusion detection device according to the first embodiment of the present invention is installed, and FIG. 1B is a cross-sectional view taken along the line AA in FIG. FIG. 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. The number of the mounting portions 13a is not limited to one, and a plurality of types of components may be arranged or stacked so as to be easily attached to the wall-like structure 11 or the handrail 12. 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. As the elastic body, a foam of a synthetic resin such as EPDM or a thermoplastic elastomer is used, and the hardness, the foaming ratio, etc. may be selected so that the compression rate (load value causing unit displacement) is smaller than that of the piezoelectric sensor 14. . In addition, the non-linear bending part 17 and the pressurization site | part 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 and the support means 16 will be described later. 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 distal end portion 141 in which a resistor for detecting disconnection / short-circuiting of electrodes, which will be described later, 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, and therefore it is not preferable to use a polymer piezoelectric material. 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. 4 and 5 are cross-sectional views of FIG. It is C sectional drawing. First, the intrusion detection apparatus according to the first embodiment will be described with reference to FIGS. 3 and 4. In FIGS. 3 and 4, 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 place formed by the mounting portion 13a and the movable portion 13b is preferably hermetically sealed, but is not necessarily sealed. The mounting portion 13a and the movable portion 13b have a shape bent inward and are fitted to each other. 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 pressurizing portion 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 pressurizing part 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 pressurizing portion 18 is pressed by the force, and the pressurizing portion 18 bends 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. In addition, as shown in FIG. 4, the pressurizing portion 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 press site | part 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. In addition, the nonlinear bending part 17 and the press part 18 may not be present.

  FIG. 6 is a block diagram of the intrusion detection device according to the first embodiment of the present invention. In FIG. 6, the control unit 15 includes an external means 30 having a detection means 151, a calculation means 152, a communication means for communicating with others, and a threatening means for 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 means 152 comprises memory means 1521, timer means 1522, initial comparison means 1523, first notification comparison means 1526, second notification comparison means 1527, third notification comparison means 1528, and adjustment means 1529. Yes.

  The operation and action of the intrusion detection apparatus configured as described above will be described below with reference to FIGS. FIG. 7A is a view showing a state where a hand 31 is put on the upper part of the wall-like structure 11 to lift the body when the intruder gets over the wall-like structure 11, and FIG. FIG. FIG. 8 is a characteristic diagram showing the change over time of the image output signal J in which the output voltage V and the output voltage of the filter unit 1511 when an intruder has entered are determined by various comparison means described later using a comparator or the like.

First, as shown in FIG. 7A, when an intruder places the hand 31 on the movable portion 13 b attached to the handrail 12 of the wall-like structure 11, the pressing by the finger deflects the movable portion, and the deformation is the piezoelectric sensor 14. And applied to the support means 16. Since the support means 16 is more flexible than the piezoelectric sensor 14, as shown in FIG. 7A, the support means 16 is compressed by the pressure of finger contact, and the piezoelectric sensor 14 is easily deformed. The piezoelectric sensor 14 outputs a signal corresponding to the deformation acceleration of 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. In addition, when a user who is not an intruder leans on, especially when the user is in a high position such as a balcony, anxiety may be given, but the configuration of the intrusion detection device of this embodiment is reliable even with a small stroke. Therefore, the pressure sensitive means can be detected easily, 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 when the hand 31 is in contact, by the filter unit 1511, and signals of other frequency bands are removed. FIG. 8 shows the output signal V of the filter unit 1511. When the hand 31 touches, 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 contact with the hand 31 is slight. 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, so that the movable portion 13 b is slidable downward, and the piezoelectric sensor 14 The amount of deformation increases. 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 pressurization portion 18 is made of a material or configuration that is less likely to be deformed than the support means 16, thereby pressing the hand 31. Is transmitted to the piezoelectric sensor 14, and the piezoelectric sensor 14 receives the displacement and bends. 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. 5 shows a situation where when the hand 31 pushes the movable portion 13b, the pressurizing portion 18 is transmitted to the piezoelectric sensor 14, the piezoelectric sensor 14 is bent, 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. The comparator unit amplitude from V ₀ which V _| V-V 0 | is determined that the contact part of the body if larger than D _0, as determination output at time t1 Lo → Hi → Lo outputs BALS signal To do. In this way, 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.

  The movement of the calculation means 152 and its surroundings will be described with reference to FIG. The potential generated by the piezoelectric sensor 14 is detected by the voltage detection unit 1511 of the detection unit 151 and transmitted to the calculation unit 152 via the amplifier 1512. In the computing means 152, the initial judgment value, the first judgment value, the second judgment value, and the third judgment value are stored in the memory means 1521. The initial comparison means 1523 compares the output of the detection means 151, that is, the input voltage to the calculation means 152 with the initial determination value (S101). As a result of the comparison, if the initial determination value is smaller, the process proceeds to the next step (S102). The comparison by the initial comparison means is performed at the timing timed by the timer means 1522. This eliminates the loss of comparison.

As described above, when the determination in step S102 is YES, the timer unit 1522 starts the first time measurement (S104) and the third time measurement (S103). That is, until this time, the starting point of the intrusion detection calculation is determined, and the intrusion detection calculation is performed from this point. During the third time measurement, the third notification comparison unit 1528 compares the input voltage to the calculation unit 152 with the third determination value (S108), and if the third determination value is smaller, the third notification comparison unit 1528 notifies the external unit 30 to that effect. Is transmitted (S109). During the first time measurement, the first notification comparison unit 1526 compares the input voltage to the calculation unit 152 with the first determination value (S112). If the first determination value is smaller, the first notification comparison unit 1526 notifies the external unit 30 to that effect. Is transmitted (S113). Here, when there is an output to the external means in S113, it is assumed that the output to the external means 30 is completed after the first time measurement is finished in S114.
When s is determined, it may be output to the external means 3 immediately without waiting for the end of the first timing. As a result, the external means 30 can recognize the situation in conjunction with the timing at which the determination of S112 is issued, and can perform alerts, intimidation, alarms, etc. and various reactions. When there is an output to the external means 30 in S113, the timer means 1522 starts the second time measurement. During the second time measurement, the second notification comparison means 1527 compares the input voltage to the calculation means 152 with the second determination value (S117), and if the second determination value is smaller, the second means 30 informs the external means 30 to that effect. Is transmitted (S119). As described above, the calculation means 152 performs comparison using various determination values by various comparison means and transmits the result to the external means 30. At this time, for example, when the second determination value is higher than the first determination value, the third determination value is the same as the second determination value, and the first time measurement and the third time measurement are the same, An intrusion detection device that performs operations such as a relatively mild “caution” when output in S113, a severe “alarm” when output in S109 and S119, and simultaneously performing “intimidation” is considered. It is done. At this time, for example, when the third timekeeping is the sum of the first timekeeping and the second timekeeping, it is possible to realize an intrusion detection device that consistently detects the third determination value with another determination value. For example, this is notified when a certain value (third determination value) is exceeded during the third timekeeping, and at the same time when the first half (first timekeeping) is low but the second half (second timekeeping) is high. It is possible to realize an intrusion detection device that also notifies. Intimidation and notification, for example, an alarm sound is generated from the threatening means for a certain period of time to threaten the intruder with light. At the same time, it may be possible to notify an indoor alarm terminal, an external telephone, a security company, the police, or the like that an intruder has entered through communication means.

  Further, the adjustment means 1529 can change various determination values stored in the memory means 1521 and the time measured in the first to third comparison notification means by the timer means 1522. Various judgment values 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 a determination, an intrusion detection device that can be arbitrarily changed and expected to be usefully developed by adjusting a determination value or a voltage comparison cycle, that is, a timekeeping time, by a microcomputer program. realizable.

  In this embodiment, the notification means is provided corresponding to each determination value. However, the notification is performed according to the threshold level, and if the determination value is the same, the notification is performed in the same manner. Yes. Therefore, in the case where the determination values are the same, it is possible to provide a common notification means and efficiently configure.

  Further, double monitoring is performed such that the comparison with the first determination value is performed during the first time measurement and the comparison with the third determination value is performed during the third time measurement in parallel. There is a feature. The timing of this timing may be a time zone in which two systems are monitored in parallel, and there may be a time zone in which the start and end timings are different and not performed in parallel. Set appropriately according to the detection purpose. To do. In this way, by combining multiple determination values and timekeeping time, it is possible to make detailed notifications by dividing the detection status into multiple levels, for example, by alert level, alertness, etc. Convenience as a device increases.

(Embodiment 2)
FIG. 10 is a block diagram of an intrusion detection device according to the second embodiment of the present invention. In FIG. 10, the control unit 25 includes an external means 30 having a detection means 151, a calculation means 252, a communication means for communicating with others, and a threatening means for sound, light and display for threatening. Here, communication means and threatening means are not shown. The detecting means 151 and the external means 30 are assumed to be equivalent to those of the first embodiment shown in FIG. The computing means 252 includes a memory means 2521, a timer means 2522, an initial comparing means 2523, a voltage integrating means 2525, a clearing means 2525a, a first notice comparing means 2526, a second notice comparing means 2527, and a third notice comparing means 2528. , Fourth notification comparison means 2529 and adjustment means 2530 are provided.

  With respect to the intrusion detection device configured as described above, the operation of the calculation means 252 and its surroundings will be described with reference to FIGS. 10 and 11. The potential generated by the piezoelectric sensor 14 is detected by the voltage detection means 1511 of the detection means 151 and transmitted to the calculation means 252 via the amplifier 1512. In the calculation means 252, the memory means 2521 stores an initial determination value, a first determination value, a second determination value, a third determination value, and a fourth determination value. The initial comparison means 2523 compares the output of the detection means 151, that is, the input voltage to the calculation means 252 with the initial determination value (S201). As a result of the comparison, if the initial determination value is smaller, the process proceeds to the next step (S202). The comparison by the initial comparison means 2523 is performed at the timing counted by the timer means 2522. This eliminates the loss of comparison. As described above, when the determination is YES in S202, the timer unit 2522 starts the first time measurement (S204) and the third time measurement (S203). During the third time measurement, the third notification comparison means 2528 compares the value obtained by integrating the input voltage to the calculation means 252 by the voltage integration means 2525 with the third determination value (S208), and the third determination value If so, the fact is transmitted to the external means 30 (S209). During the first time measurement, the first notification comparison unit 2526 compares the value obtained by integrating the input voltage to the calculation unit 252 by the voltage integration unit 2525 with the first determination value (S212), and the first determination value If so, the fact is transmitted to the external means 30 (S213). Here, when there is an output to the external means in S213, the output is made to the external means 30 after the completion of the first timekeeping in S214. However, when a Yes determination is made in S212, the end of the first timekeeping is not waited. It may be output to the external means 3 immediately. Accordingly, the external unit 30 can recognize the situation in conjunction with the timing at which the determination in S212 is issued, and can perform notifications such as caution, intimidation, and alarm and various reactions. When the first time measurement is completed (S220), the value accumulated by the voltage integrating means 2525 is cleared by the clearing means 2525a. Here, the integrated value is not cleared at the time when the third time measurement ends (S206), but it may be cleared in the same manner. When there is an output to the external means 30 in S213, the timer means 2522 starts the second time measurement. During the second timing, the second notification comparison unit 2527 compares the value obtained by integrating the input voltage to the calculation unit 252 by the voltage integration unit 2525 with the second determination value (S217), and the second determination value is compared with the second determination value. If so, the fact is transmitted to the external means 30 (S219). As described above, the calculation means 252 performs comparison using various determination values by various comparison means and transmits the result to the external means 30. At this time, for example, when the second determination value is higher than the first determination value, the third determination value is the same as the second determination value, and the first time measurement and the third time measurement are the same, An intrusion detection device may be considered in which a relatively long “caution” is output when it is output in S213 and a severe “alarm” or “intimidation” is left when it is output in S209 and S219. At this time, for example, when the third timekeeping is the sum of the first timekeeping and the second timekeeping, it is possible to realize an intrusion detection device that consistently detects the third determination value with another determination value. For example, this is notified when a certain value (third determination value) is exceeded during the third timekeeping, and at the same time when the first half (first timekeeping) is low but the second half (second timekeeping) is high. It is possible to realize an intrusion detection device that also notifies. Intimidation and notification, for example, an alarm sound is generated from the threatening means for a certain period of time to threaten the intruder with light. At the same time, it may be possible to notify an indoor alarm terminal, an external telephone, a security company, the police, or the like that an intruder has entered through communication means.

  The fourth notification comparison unit compares the output of the detection unit 151 not integrated by the voltage integration unit 2525 with the fourth determination value. For example, if the fourth determination value is smaller, the fourth notification comparison unit Communicate information. For example, when a very large output is output from the detection means 151, it is transmitted to the external means 30 in real time without being integrated. For example, there is a fallen object that is larger than the strength of the wall-like structure. 151 detects and outputs this, but there is a possibility that this state is transmitted to the external means 30 when there is a possibility that the wall-like structure or the like is destroyed and cannot be detected correctly thereafter. It is done. Since it is fully understood that this action is moving in the background, the movement of the fourth notification comparing means is not described in the flow of FIG. Note that the voltages to be compared by the initial comparison unit 2526 are not integrated here, but may be integrated by the voltage integration unit 2525 so as to be compared by the first notification comparison unit.

  As described in the present embodiment, the voltage level output from the pressure-sensitive means can be detected by various determination values for each predetermined time unit to detect intrusion in real time, and the output voltage of the pressure-sensitive means It is possible to detect abnormalities in line with various intrusions even by having a configuration that improves detection accuracy by eliminating false detection due to instantaneous noise signals by integrating and determining It becomes possible to increase functions.

  Further, the adjustment means 2530 can change various determination values stored in the memory means 2521 and the time measured by the timer means 2522, and various determination values and timer means can be selected according to the situation of the installation site of the intrusion detection device and the detection target. The timekeeping time can be optimized by 2522.

  In this embodiment, the notification means is provided corresponding to each determination value. However, the notification is performed according to the threshold level, and if the determination value is the same, the notification is performed in the same manner. Yes. Therefore, in the case where the determination values are the same, it is possible to provide a common notification means and efficiently configure. However, different notifications are made even if the determination values are the same if different notifications are required for different timing times.

  In this way, by combining multiple determination values and timekeeping time, it is possible to make detailed notifications by dividing the detection status into multiple levels, for example, by alert level, alertness, etc. Convenience as a device increases.

  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 of the door handle, etc. As a security system, such as issuing an alarm and intimidating when trying to open the drawer or door illegally, etc. Is also applicable. In addition, it is possible to apply as an intrusion detection device that can sufficiently secure a stroke for reacting with a reacting portion, can be securely fixed, and can cope with various shapes.

(A) Configuration diagram of the wall-like structure of the intrusion detection device according to the embodiment of the present invention (b) Cross-sectional view at the position AA in FIG. (A) Configuration diagram of piezoelectric sensor 14 and control unit 15 according to the embodiment of the present invention (b) Cross-sectional view at position BB in FIG. 2 (a) 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 drawing of the state which the intruder pushed in the longitudinal direction of the package of the intrusion detection apparatus in embodiment of this invention Block diagram of the intrusion detection device in Embodiment 1 of the present invention (A) The figure which shows the state which has put the hand 21 on the upper part of the wall-shaped structure 11 in order to lift a body, when the intruder invades the wall-shaped structure 11 in the embodiment of the present invention Sectional view of 11 (a) FIG. 5 is a characteristic diagram showing the change over time of the output signal V of the filter unit 154 and the output signal J of the comparison unit when an intruder enters the intrusion detection device according to the first embodiment of the present invention. Flow chart of computing means in Embodiment 1 of the present invention Block diagram of an intrusion detection device in Embodiment 2 of the present invention Flow chart of computing means in Embodiment 2 of the present invention Configuration diagram of a conventional intrusion detection device 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 151 Detection means 152 Calculation means 30 External means 1521, 2521 Memory means 1522, 2522 Timer means 1523, 2523 Initial comparison means 2525 Voltage integration means 1526, 2526 First notification comparison Means 1527, 2527 Second notice comparison means 1528, 2528 Third notice comparison means 2529 Fourth notice comparison means

Claims (16)

A pressure-sensitive means disposed so as to be deformed by contact or pressing pressure when an intruder enters, and a calculation means for performing a calculation based on an output voltage of the pressure-sensitive means and outputting a calculation result; The computing means includes a memory means, a voltage integrating means, an initial comparing means, and one or more notification comparing means. The memory means has an initial judgment value and one or more judgment values, and the initial comparing means The output voltage of the pressure means is compared with the initial determination value, and when it is determined that the output voltage of the pressure sensitive means is larger, the voltage integrating means starts integrating the output voltage of the pressure sensitive means, and the 1 Alternatively, the plurality of notification comparison means compares the integrated value of the output voltage of the pressure sensitive means with the one or more determination values corresponding to each of the one or more notification comparison means, and the integrated value is larger. When the judgment is made, The intrusion detection device each of the one or more notification comparing means detects the intrusion and outputs the result of the calculation. 2. The intrusion detection apparatus according to claim 1, wherein the computing means includes timer means, and the voltage integrating means integrates and outputs the output voltage of the pressure sensitive means for every arbitrary time counted by the timer means. The intrusion detection device according to any one of claims 1 to 2, wherein the voltage integration means integrates the output voltage of the pressure sensing means for an arbitrary time measured by the timer means. A pressure sensing means; and a computing means for computing based on an output voltage of the pressure sensing means and outputting a computation result, wherein the computing means is a memory means, a timer means, a voltage integrating means, an initial comparing means, and a first notification. A comparison unit and a second notification comparison unit, wherein the memory unit stores an initial determination value, a first determination value, and a second determination value, and the initial comparison unit outputs the output voltage of the pressure sensing unit and the initial determination value; When the determination value is compared and it is determined that the output voltage of the pressure-sensitive means is larger, the timer means starts the first time measurement, and the voltage integrating means is the pressure-sensitive means. The integrated value obtained by integrating the output voltage and the first determination value are compared, and when it is determined that the integrated value of the voltage integrating means is larger by the end of the first timing, the first notification information is obtained. The timer means outputs a second time from the end of the first timing. The second notification comparing means in the first half of the period compares the integrated value obtained by integrating the output voltage of the pressure-sensitive means with the second determination value, and until the end of the second timing. An intrusion detection device that outputs second notification information when it is determined that the integrated value of the voltage integrating means is larger. 5. The first timing is ended when the first notification comparing means determines that the integrated value of the voltage integrating means is larger than the first determination value during the first timing. Intrusion detection device. The calculation means has third notification comparison means, the third judgment value is stored in the memory means, the initial comparison means compares the output voltage of the pressure sensitive means with the initial judgment value, and the output of the pressure sensitive means. If it is determined that the voltage is greater, the timer means starts the third time measurement, and the third notification comparing means in the previous period is the integrated value obtained by integrating the output voltage of the pressure sensing means by the voltage integrating means and the third determination. 6. The third notification information is output when the values are compared and it is determined that the integrated value of the voltage integrating means is greater by the end of the third time measurement. Intrusion detection device. The intrusion detection device according to claim 6, wherein the start and end of the third timing are equal to the start and end of the first timing. The intrusion detection device according to claim 6, wherein the third clocking time is equal to the sum of the first clocking time and the second clocking time, and the start of the first clocking and the third clocking are the same. The intrusion detection device according to any one of claims 6 to 8, wherein the third determination value is equal to the second determination value. The intrusion detection device according to any one of claims 4 to 9, wherein at least one of the second timekeeping and the third timekeeping clears the integrated value of the voltage integrating means when the timekeeping ends. 11. At least one of the second timekeeping and the third timekeeping clears the integrated value of the voltage integrating means when outputting the second notification information or the third notification information. The intrusion detection device according to item. The first notification comparing means compares the integrated value obtained by integrating the output voltage of the pressure sensing means by the voltage integrating means with the first determination value, and determines the output value of the voltage integrating means by the end of the first timing. The intrusion detection device according to any one of claims 4 to 11, wherein when the value cannot be determined to be large, the integrated value of the voltage integrating means is cleared. The intrusion detection device according to any one of claims 1 to 12, wherein an output voltage of the pressure sensing means is output to the calculation means via the detection means. The intrusion detection device according to any one of claims 1 to 13, 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 14, wherein the pressure sensitive means is disposed on the wall-like structure. The program for performing at least one part of the function which the intrusion detection apparatus in any one of Claim 1 to 15 has with a computer.