JP2011108106A - Detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detector that maintains accuracy of detecting pressurization to a hollow tube. <P>SOLUTION: A microphone 52 and a speaker 53 for collecting sound transmitted through a tube 51 are disposed at an opening of one end of the tube 51, and connected to a controller 54. A first failure determining unit 61 determines that a failure occurs when an abnormal sound is input to the microphone 52. A confirmation sound output control unit 62 outputs a confirmation sound from the speaker 53 when no abnormal sound is input to the microphone 52. When a reflection sound of the confirmation sound is input to the microphone 52, a second failure determining unit 64 determines a failure of the tube 51 according to comparison between the confirmation sound and the reflection sound. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a detection device.

  Conventionally, there is a detection device in which a microphone is provided inside a hollow tube and vibration sound transmitted to the hollow tube is detected by the microphone (see, for example, Patent Document 1). Specifically, for example, a microphone is provided on the fence post, and the detection device detects the intruder by picking up the sound generated by the vibration generated when the intruder climbs the fence and transmitting it to the fence post. can do. In addition, there is a sensing device that detects a sound generated in a tube when the tube is pressurized by applying an external force to the tube by applying a microphone to the opening side of the tube that is closed at one end as a hollow tube (for example, Patent Documents). 2). For example, an intruder or the like can be detected by installing a tube in a place where an intruder or an approaching vehicle is supposed to pass and the sensing device determines that the tube has been stepped on by sound.

JP-A-7-129863 JP 2008-76124 A

  However, the technique disclosed in Patent Document 2 may cause the following problems. For example, one is that even when the tube is newly stepped on the side farther from the microphone than the stepped position in the state where the tube is stepped on, it cannot be detected. This is because vibrations are difficult to be transmitted at the stepped-on position, and sound generated after that is difficult to be transmitted to the microphone. One is that when the tube is continuously stepped on, the state cannot be detected. This is because a new sound is not generated in a state where a certain force is applied and the tube remains crushed. One is that the tube breakage cannot be detected. As described above, in the conventional technology, when the tube is first stepped on, it can be detected as an abnormality, but there is a possibility that the subsequent abnormality cannot be detected.

  Supplementally, in a general security system, the presence or absence of an abnormality is determined based on a detection signal from a detection device for detecting an intruder when the security mode is set. When a detection signal is output from the detection device when the security mode is set, the fact that an abnormality has been detected is notified and a security guard rushes to confirm the site. At this time, since the state of the detection device is also confirmed, if the tube cannot be normally detected such as deformation or breakage, it is restored to the normal state. On the other hand, when the security mode is cancelled, the detection device outputs a detection signal because the entry / exit of people is not restricted or a person with a legitimate authority has entered / exited. Is not judged as abnormal detection and no notification is made. Therefore, no notification will be made even if the tube is crushed due to some external force applied to the tube while the security mode is cancelled, or even if the tube is crushed by obstruction. Therefore, the state of the detection device is not confirmed, and there is a possibility that it cannot be grasped that normal detection cannot be performed. For this reason, there is a possibility that the detection device cannot maintain the accuracy of detecting an intruder or the like.

  This invention is made in view of the above, Comprising: In detection apparatuses, such as an intruder using a hollow tube, providing the detection apparatus which can grasp | ascertain that it is in the state which cannot perform normal detection. Objective.

  In order to solve the above-mentioned problems and achieve the object, the present invention is a detection device, and collects sound transmitted through the hollow tube at one end of the hollow tube having at least one end opened. And a sound output means for outputting sound is disposed at at least one of the one end and the other end of the hollow tube, and an abnormal sound generated when the hollow tube is pressurized is provided. When the sound collecting means collects the sound, the first abnormality judging means for judging that an abnormality has occurred, and when the abnormal sound is not collected by the sound collecting means, a predetermined sound is output from the sound output means. The sound output control means to be used, whether or not the predetermined sound is collected by the sound collecting means, and the comparison between the predetermined sound collected by the sound collecting means and the predetermined sound output from the sound output means. In response, the abnormality of the hollow tube is judged, or the reflected sound of the predetermined sound is not collected. Second abnormality determining means for determining occurrence of abnormality in the hollow tube in accordance with whether the sound is collected by the means and the comparison between the reflected sound and the predetermined sound output from the sound output means. It is characterized by that.

  According to the present invention, it is possible to maintain the detection accuracy for detecting the pressurization to the hollow tube.

FIG. 1 is a diagram illustrating a configuration of a detection device 50 according to the first embodiment. FIG. 2 is a diagram illustrating a functional configuration of the control device 54. FIG. 3 is a flowchart illustrating a procedure of abnormality detection processing performed by the detection device 50. FIG. 4 is a diagram illustrating a state where the tube 51 is completely trampled. FIG. 5 is a diagram illustrating a state in which the tube 51 is crushed or deformed halfway along the way. FIG. 6 is a diagram illustrating a state where one end to be closed is broken and opened. FIG. 7 is a diagram illustrating a configuration of a conventional detection device. FIG. 8 is a diagram illustrating the configuration of the detection device 50 according to the second embodiment. FIG. 9 is a diagram illustrating a functional configuration of the control device 54. FIG. 10 is a flowchart illustrating a procedure of abnormality detection processing performed by the detection device 50. FIG. 11 is a diagram illustrating the configuration of the detection device 50 according to the third embodiment. FIG. 12 is a diagram illustrating a functional configuration of the control device 54. FIG. 13 is a flowchart illustrating a procedure of abnormality detection processing performed by the detection device 50. FIG. 14 is a diagram illustrating a configuration of a detection device 50 according to a modification.

  Embodiments of a detection apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

[First embodiment]
FIG. 1 is a diagram illustrating the configuration of the detection device 50. The detection device 50 includes a tube 51, a microphone 52, a speaker 53, and a control device 54. The tube 51 is a flexible hollow tube (referred to as a hollow tube). One end of the tube 51 is opened and the other end is closed. The microphone 52 and the speaker 53 are disposed in an opening at one end of the tube 51 and are connected to the control device 54. The microphone 52 collects sound transmitted through the tube 51 and outputs it to the control device 54. That is, the sound input to the microphone 52 is input to the control device 54. The speaker 53 outputs sound under the control of the control device 54. The control device 54 includes a control unit such as a CPU (Central Processing Unit) that controls the entire device, a main storage unit such as a ROM (Read Only Memory) and a RAM (Random Access Memory) that stores various data and various programs, A hardware configuration using an ordinary computer, including an auxiliary storage unit such as an HDD (Hard Disk Drive) or CD (Compact Disc) drive device for storing various data and various programs, and a bus for connecting them. It has become. The control device 54 determines whether there is an abnormality based on the sound input to the microphone 52.

  Here, various functions realized by the CPU of the control device 54 executing various programs stored in the main storage unit and the auxiliary storage unit will be described with reference to FIG. FIG. 2 is a diagram illustrating a functional configuration of the control device 54. The control device 54 includes an abnormal sound detection unit 60, a first abnormality determination unit 61, a confirmation sound output control unit 62, a reflected sound detection unit 63, and a second abnormality determination unit 64. These units are generated on a main storage unit such as a RAM when the CPU program is executed.

  The abnormal sound detection unit 60 inputs a sound (referred to as an abnormal sound) generated when an external force is applied to the tube 51 such as when the tube 51 is stepped on or vibration generated by walking is transmitted to the microphone 52. It is always detected whether or not it has been done. In addition, according to the material of the tube 51, a magnitude | size, length, etc., the frequency, volume, etc. of a sound when the tube 51 is pressurized and a part of tube 51 will be in a closed state can be grasped | ascertained beforehand. . For this reason, the abnormal sound detection unit 60 detects a sound corresponding to such a sound as an abnormal sound. The first abnormality determination unit 61 determines that an abnormality has occurred when it is detected that an abnormal sound has been input to the microphone 52 as a result of the detection by the abnormal sound detection unit 60. As a result of detection by the abnormal sound detection unit 60, the confirmation sound output control unit 62 periodically or continuously outputs a predetermined sound (referred to as confirmation sound) from the speaker 53 when it is detected that no abnormal sound is input to the microphone 52. And output. The confirmation sound is a predetermined sound such as frequency and volume, and is different from the abnormal sound described above. The reflected sound detection unit 63 detects whether or not the reflected sound of the confirmation sound output from the speaker 53 is collected by the microphone 52 and input to the microphone 52. When it is detected that the reflected sound is output as a result of the detection by the reflected sound detection unit 63, the second abnormality determination unit 64 determines whether the tube 51 is abnormal according to the comparison between the confirmation sound and the reflected sound. . Specifically, for example, the response time (response time change) from when the confirmation sound is output until the reflected sound returns, the attenuation ratio (volume change) between the confirmation sound and the reflected sound, the confirmation sound S / N ratio (change in noise) between the reflected sound and the reflected sound. The second abnormality determination unit 64 determines that an abnormality has occurred, such as the tube 51 being crushed or deformed halfway along the way, according to the comparison between the confirmation sound and the reflected sound. The state in which the tube 51 is crushed halfway is a state in which a portion of the tube 51 is pressurized in a hollow state. The second abnormality determination unit 64 determines that an abnormality such as the tube 51 being broken has occurred when it is detected that no reflected sound is input as a result of detection by the reflected sound detection unit 63.

  Next, the procedure of the abnormality detection process performed by the detection device 50 according to the present embodiment will be described with reference to FIG. The control device 54 included in the detection device 50 constantly detects whether or not an abnormal sound has been input to the microphone 52 (step S1). If it is detected that an abnormal sound has been input (step S1: YES), an abnormality is detected. It is determined that it has occurred (step S2). Further, when it is detected that no abnormal sound is input to the microphone 52 (step S1: NO), the control device 54 outputs a confirmation sound from the speaker 53 (step S3). The control device 54 detects whether or not the reflected sound of the confirmation sound output from the speaker 53 is collected by the microphone 52 and input to the microphone 52 (step S4), and it is detected that the reflected sound is input. In the case (step S4: YES), the control device 54 determines whether or not the response time from when the confirmation sound is output until the reflected sound is returned is a predetermined time and whether or not the volume of the reflected sound is at a predetermined level. (Step S6). When the response time is the predetermined time and the volume of the reflected sound is the predetermined level (step S6: YES), the control device 54 determines that it is normal (step S8). In this case, since the response time for the reflected sound is a predetermined time and the volume is a predetermined level, an abnormality such as the tube 51 being crushed, deformed or broken halfway has occurred. It can be judged that there is not.

  On the other hand, when the response time is not the predetermined time or the volume of the reflected sound is not the predetermined level (step S6: NO), the control device 54 has an abnormality such as the tube 51 being crushed or deformed halfway along the way. Is determined to have occurred (step S7). For example, as illustrated in FIG. 4, no abnormal sound is newly generated when the tube 51 is already crushed, but when a confirmation sound is output in this state, a confirmation sound is generated at the position where the tube 51 is crushed. Is reflected, the response time from when the confirmation sound is output until the reflected sound returns is shorter than usual. Further, as illustrated in FIG. 5, even when the tube 51 is already crushed or deformed halfway in the middle, no abnormal sound is newly generated, but when a confirmation sound is output in this state Since the tube 51 is attenuated at a portion where the tube 51 is crushed or deformed, the volume of the reflected sound becomes smaller than a predetermined level. In this way, it is determined that the tube 51 is in an abnormal state such as being completely crushed, being crushed, or being deformed on the basis of the response time of the reflected sound and the change in volume. Can do.

  When it is detected that no reflected sound is input (step S4: NO), the control device 54 determines that an abnormality such as a break has occurred in the tube 51 (step S5). For example, as illustrated in FIG. 6, even when one end that should be closed is broken and opened, no abnormal sound is newly generated, but even if a confirmation sound is output in this state, the opening is not generated. The confirmation sound is emitted from the part and the reflected sound hardly returns. Therefore, when the confirmation sound is not input to the microphone 52, it can be determined that an abnormality such as the tube 55 being broken has occurred.

  Conventionally, as illustrated in FIG. 7, in a state where the tube has already been stepped on and a part of the tube has been closed, and the position between the stepped and closed end to the other end that is closed, Even if the tube is further stepped on, the abnormal sound generated thereby cannot be collected by the microphone. Therefore, in a situation where no abnormal noise is detected, the tube is in a state where it can be detected normally, or the tube has already been stepped on, or the tube has been crushed halfway, deformed, or broken, etc. It was not possible to detect whether or not an abnormality occurred.

  On the other hand, in the present embodiment, due to the configuration as described above, in a situation where abnormal sound is not detected, an abnormality such as the tube 51 being crushed, deformed, or broken halfway along the way occurs. It is possible to detect whether it is in a state. In a state where an abnormality has occurred in the tube 51, the detection accuracy for detecting the stepping of the tube 51 and the vibration transmitted to the tube 51 is lowered. For this reason, by detecting the abnormality of the tube 51, it becomes possible to eliminate the abnormality of the tube 51 and to maintain the detection accuracy.

  In addition, as described above, the tube is crushed or the tube is broken, due to deterioration of the tube, due to a heavy object placed on the tube, due to being crafted as an obstruction to detection, And so on.

  In the present embodiment, the response time from when the confirmation sound is output to when the reflected sound is returned varies depending on the position at which the tube 51 is stepped on. It is also possible to specify the stepped-on position.

  Further, in this embodiment, when it is detected that no abnormal sound is input to the microphone 52 (step S1: NO), the confirmation sound is output from the speaker 53 (step S3) periodically or at the start of security. For example, it may be performed at an arbitrary timing.

[Second Embodiment]
Next, a second embodiment of the detection device will be described. In addition, about the part which is common in the above-mentioned 1st Embodiment, it demonstrates using the same code | symbol or abbreviate | omits description.

  FIG. 8 is a diagram illustrating the configuration of the detection device 50 according to the present embodiment. The detection device 50 includes a tube 55, a microphone 52, a speaker 53, and a control device 54. The tube 55 is a flexible hollow tube. Both ends of the tube 55 are opened. The microphone 52 and the speaker 53 are disposed in an opening at one end of the tube 55 so that the microphone 52 and the speaker 53 are opposed to each other, and the speaker 53 is disposed in an opening at the other end, and these are connected to the control device 54. The hardware configurations of the microphone 52, the speaker 53, and the control device 54 are the same as those in the first embodiment.

  Here, various functions realized by the CPU of the control device 54 according to the present embodiment executing various programs stored in the main storage unit and the auxiliary storage unit will be described with reference to FIG. FIG. 9 is a diagram illustrating a functional configuration of the control device 54 according to the present embodiment. The control device 54 includes an abnormal sound detection unit 60, a first abnormality determination unit 61, a confirmation sound output control unit 62, a confirmation sound detection unit 65, and a second abnormality determination unit 64.

  The abnormal sound detection unit 60, the first abnormality determination unit 61, and the confirmation sound output control unit 62 are the same as those in the first embodiment. The confirmation sound detector 65 detects whether or not the confirmation sound output from the speaker 53 is collected by the microphone 52 facing the speaker 53 and input to the microphone 52. When it is detected that the confirmation sound is output as a result of detection by the confirmation sound detection unit 65, the second abnormality determination unit 64 determines whether the tube 55 is abnormal based on the change in the confirmation sound. The change in the confirmation sound is, for example, a change between the confirmation sound output from the speaker 53 and the confirmation sound input into the microphone 52, and is, for example, an attenuation ratio (change in volume) of the confirmation sound. The second abnormality determination unit 64 determines that an abnormality such as the tube 55 being crushed or deformed halfway along the way has occurred due to such a change in confirmation sound. In addition, the second abnormality determination unit 64 detects that the confirmation sound is not output as a result of the detection by the confirmation sound detection unit 65, such that the tube 55 is completely crushed or broken in the middle. Judge that an abnormality has occurred.

  Next, the procedure of abnormality detection processing performed by the detection device 50 according to the present embodiment will be described with reference to FIG. Steps S1 to S3 are the same as those in the first embodiment. In step S <b> 14, the control device 54 included in the detection device 50 detects whether the confirmation sound output from the speaker 53 is collected by the microphone 52 and input to the microphone 52, and is detected that the confirmation sound is input. If so (step S14: YES), the control device 54 determines whether or not the volume of the confirmation sound input to the microphone 52 is a predetermined level (step S16). When the volume of the confirmation sound input to the microphone 52 is a predetermined level (step S16: YES), the control device 54 determines that it is normal (step S8). For example, when the tube 55 is not stepped on at all, no abnormal sound is generated. However, when a confirmation sound is output in this state, the confirmation sound output from the speaker 53 is not attenuated so much and faces the speaker 53. Sound is collected by the microphone 52. Therefore, when the sound volume is at a predetermined level, it can be determined that no abnormality has occurred such as the tube 55 being crushed, deformed, or broken in the middle.

  On the other hand, when the volume of the confirmation sound input to the microphone 52 is not the predetermined level (step S16: NO), the control device 54 has an abnormality such as the tube 55 being crushed or deformed halfway along the way. Is determined (step S17). For example, even when the tube 55 is crushed or deformed halfway in the middle, no new abnormal sound is generated, but the confirmation sound output in this state is attenuated and the microphone 52 facing the speaker 53 is attenuated. The sound is collected. Accordingly, since the volume of the confirmation sound is not at a predetermined level, in this case, it can be determined that an abnormality such as the tube 55 being crushed or deformed halfway along the way has occurred.

  When it is detected that the confirmation sound is not input to the microphone 52 (step S14: NO), the control device 54 has an abnormality such as the tube 55 being completely crushed or broken in the middle. Is determined (step S15). For example, when the tube 55 is completely crushed or broken on the way, no new abnormal sound is generated, but the confirmation sound output in this state reaches the microphone 52 facing the speaker 53. No sound is collected. Therefore, when the confirmation sound is not input to the microphone 52, it can be determined that an abnormality such as the tube 55 being broken has occurred.

  According to the above configuration, when abnormal sound cannot be collected, it is possible to detect whether an abnormality such as the tube 55 being crushed, deformed, or broken in the middle is occurring. it can. Accordingly, it is possible to maintain the detection accuracy for detecting the treading of the tube 55.

[Third embodiment]
Next, a third embodiment of the detection device will be described. In addition, about the part which is common in the above-mentioned 1st Embodiment or 2nd Embodiment, it demonstrates using the same code | symbol or abbreviate | omits description.

  FIG. 11 is a diagram illustrating the configuration of the detection device 50 according to the present embodiment. The detection device 50 includes a tube 55, a microphone 52, two speakers 53 </ b> A and 53 </ b> B, and a control device 54. The microphone 52 and the speaker 53A are disposed at the opening at one end of the tube 55, and the speaker 53B is disposed at the opening at the other end so that the microphone 52 and the speaker 53A are at the same end. These are connected to the control device 54. The speaker 53B outputs a predetermined sound (referred to as confirmation sound 1) under the control of the control device 54. The speaker 53A outputs a predetermined sound (referred to as confirmation sound 2) under the control of the control device 54. The confirmation sound 1 and the confirmation sound 2 may be the same or different, or may be the same as or different from the confirmation sound in the first embodiment described above. The configuration of the tube 55 and the hardware configuration of the microphone 52 and the control device 54 are the same as those in the first embodiment.

  Here, various functions realized by the CPU of the control device 54 according to the present embodiment executing various programs stored in the main storage unit and the auxiliary storage unit will be described with reference to FIG. FIG. 12 is a diagram illustrating a functional configuration of the control device 54 according to the present embodiment. The control device 54 includes an abnormal sound detection unit 60, a first abnormality determination unit 61, a confirmation sound output control unit 62, a confirmation sound detection unit 65, a reflected sound detection unit 63, and a second abnormality determination unit 64. Have.

  The abnormal sound detection unit 60 and the first abnormality determination unit 61 are the same as those in the first embodiment. As a result of detection by the abnormal sound detection unit 60, the confirmation sound output control unit 62 periodically or continuously outputs the confirmation sound 1 from the speaker 53 </ b> B facing the microphone 52 when it is detected that no abnormal sound is input to the microphone 52. And output. When the confirmation sound detection unit 65 detects that the confirmation sound 1 is not input to the microphone 52, the confirmation sound output control unit 62 receives the confirmation sound 2 from the speaker 53 </ b> A at the same end as the microphone 52. Are output periodically or continuously. The confirmation sound detection unit 65 detects whether or not the confirmation sound 1 output from the speaker 53 </ b> B is collected by the microphone 52 and input to the microphone 52. The reflected sound detection unit 63 detects whether or not the reflected sound of the confirmation sound 2 generated from the speaker 53 </ b> A is collected by the microphone 52 and input to the microphone 52.

  When it is detected that the confirmation sound 1 is input as a result of the detection by the confirmation sound detection unit 65, the second abnormality determination unit 64 determines whether the tube 55 is abnormal according to the change in the confirmation sound 1. The change in the confirmation sound 1 is substantially the same as in the second embodiment described above. The second abnormality determination unit 64 determines that an abnormality such as the tube 55 being crushed or deformed halfway along the way due to such a change in the confirmation sound 1 has occurred. Further, the second abnormality determination unit 64 determines whether or not the tube 51 is abnormal depending on whether or not the reflected sound of the confirmation sound 2 is input as a result of detection by the reflected sound detection unit 63. As a result of detection by the reflected sound detection unit 63, the second abnormality determination unit 64 detects that the reflected sound of the confirmation sound 2 has been input, and an abnormality such as the tube 55 being completely crushed in the middle has occurred. to decide. The state in which the tube 55 is completely crushed in the middle is a state in which a part of the tube 55 is closed. Moreover, when the second abnormality determination unit 64 detects that the reflected sound of the confirmation sound 2 is not input as a result of the detection by the reflected sound detection unit 63, an abnormality such as the tube 55 being broken has occurred. Judge.

  Next, the procedure of abnormality detection processing performed by the detection device 50 according to the present embodiment will be described with reference to FIG. Steps S1 and S2 are the same as those in the first embodiment. In step S20, the control device 54 included in the detection device 50 causes the confirmation sound 1 to be output from the speaker 53B. Note that the output of the confirmation sound 1 from the speaker 53B may be performed at an arbitrary timing such as periodically or at the start of security. The control device 54 detects whether or not the confirmation sound 1 output from the speaker 53B is collected by the microphone 52 and input to the microphone 52 (step S21), and it is detected that the confirmation sound 1 is input. In the case (step S21: YES), the control device 54 determines whether or not the volume of the confirmation sound 1 input to the microphone 52 is a predetermined level (step S22). When the volume of the confirmation sound 1 input to the microphone 52 is a predetermined level (step S22: YES), the control device 54 determines that it is normal as in the second embodiment described above (step S8). . On the other hand, when the volume of the confirmation sound 1 input to the microphone 52 is not a predetermined level (step S22: NO), the controller 54 causes the tube 55 to be crushed halfway along the way as in the second embodiment described above. It is determined that an abnormality such as being deformed or deformed has occurred (step S17).

  On the other hand, when it is detected that the confirmation sound 1 is not input to the microphone 52 (step S21: NO), the control device 54 outputs the confirmation sound 2 from the speaker 53A periodically or continuously (step S24). The control device 54 detects whether or not the reflected sound of the confirmation sound 2 output from the speaker 53A is collected by the microphone 52 and input to the microphone 52 (step S25), and the reflected sound of the confirmation sound 2 is detected. When it is detected that the input has been made (step S25: YES), the control device 54 determines that an abnormality such as the tube 55 being completely crushed in the middle has occurred (step S26). For example, even when the tube 55 is completely crushed in the middle, no new abnormal sound is generated, but the confirmation sound 1 output in this state does not reach the microphone 52 and is not collected. However, the confirmation sound 2 output in this state is reflected and collected by the microphone 52. Therefore, although the confirmation sound 1 is not input to the microphone 52, when the reflected sound of the confirmation sound 2 is input to the microphone 52, it is determined that an abnormality such as the tube 55 being completely crushed in the middle has occurred. Can do.

  Further, when it is detected that the reflected sound of the confirmation sound 2 is not input (step S25: NO), the control device 54 determines that the tube 55 is broken as in the first embodiment described above. Is determined to have occurred (step S5). For example, even when the tube 55 is broken, no new abnormal sound is generated, but the confirmation sound 1 output in this state does not reach the microphone 52 and is not collected. Further, the confirmation sound 2 is not reflected, and therefore the reflected sound of the confirmation sound 2 is not collected by the microphone 52. Therefore, when the reflected sound of the confirmation sound 1 and the confirmation sound 2 is not input to the microphone 52, it can be determined that an abnormality such as the tube 55 being broken has occurred.

  According to the above configuration, when abnormal sound cannot be collected, it is possible to detect whether an abnormality such as the tube 55 being crushed, deformed, or broken is occurring. Accordingly, it is possible to maintain the detection accuracy for detecting the treading of the tube 55.

  In the present embodiment, the response time from when the confirmation sound is output to when the reflected sound is returned varies depending on the position where the tube 55 is stepped on. It is also possible to specify the stepped-on position.

  Even if the speaker 53B breaks down, the occurrence of an abnormality such as intrusion or the occurrence of an abnormality in the tube 55 can be detected, so that the function of the detection device 50 can be maintained.

[Modification]
Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, you may delete some components from all the components shown by embodiment. Furthermore, the constituent elements over different embodiments may be appropriately combined. Further, various modifications as exemplified below are possible.

  In each of the above-described embodiments, various programs executed by the control device 54 may be stored on a computer connected to a network such as the Internet and provided by being downloaded via the network. The various programs are recorded in a computer-readable recording medium such as a CD-ROM, a flexible disk (FD), a CD-R, and a DVD (Digital Versatile Disc) in an installable or executable format file. The computer program product may be provided.

  In each of the embodiments described above, the detection device 50 may include a plurality of microphones and speakers. FIG. 14 is a diagram illustrating the configuration of the detection device 50 according to this modification. The detection device 50 includes a tube 55, two microphones 52A and 52B, two speakers 53A and 53B, and a control device 54. The microphone 52 </ b> A and the speaker 53 </ b> A are disposed at the opening of the tube 55 such that the microphone 52 </ b> A and the speaker 53 </ b> A have the same end, and the microphone 52 </ b> B and the speaker 53 </ b> B are connected to the control device 54. According to such a configuration, even if any of the microphones 52A and 52B or any of the speakers 53A and 53B breaks down, it is possible to detect the occurrence of abnormality such as intrusion or the occurrence of abnormality in the tube 55. The function of the detection device 50 can be maintained.

  In each of the embodiments described above, the first abnormality determination unit 61 determines that an abnormality has occurred, for example, when the volume of the sound input to the microphone 52 is equal to or higher than a predetermined level or within a predetermined range. Alternatively, it may be determined that an abnormality has occurred when the frequency of the sound is within a predetermined range.

  In each of the embodiments described above, the microphone 52 and the speaker 53 are composed of a coil and a diaphragm, and have the same structure. For this reason, in the first embodiment and the third embodiment, the microphone 52 and the speaker 53 disposed in the opening at the same end of the tube 51 or the tube 55 may be used together.

  In each of the above-described embodiments, when the detection device 50 is connected to the monitoring center and determines that an abnormality has occurred, the detection device 50 may transmit an abnormality alarm indicating that fact to the monitoring center. In addition, a security mode for transmitting an abnormality occurrence alarm indicating that an abnormality has occurred to the monitoring center when it is determined that an abnormality has occurred, and an abnormality occurrence alarm indicating that an abnormality has occurred to the monitoring center even if it is determined that an abnormality has occurred. You may make it link execution of an abnormality detection process, the detection of the abnormality in step S2, and the output of a confirmation sound with the security cancellation | release mode which is not transmitted. For example, when the security mode is set, the detection device 50 may execute an abnormality detection process, or when the security release mode is set, a confirmation sound is output in step S3. Also good.

  Moreover, when the abnormal sound is detected in step S1 (step S1: YES), the control device 54 determines whether or not the security mode is set, and if the determination result is affirmative, In S2, it may be determined that an abnormality has occurred, and an abnormality occurrence alarm may be transmitted to the monitoring center.

  In each of the embodiments described above, the case where a flexible tube is used as the hollow tube has been described. However, any material can be used as long as it can transmit sound (vibration) generated by an intruder or an approaching vehicle. Can be anything. Further, the inside of the hollow tube may be filled with a liquid, and sound (vibration) may be transmitted using the liquid as a medium.

  Furthermore, instead of the microphone 52 and the speaker 53, any means may be used as a means capable of detecting vibration and a means capable of generating vibration, respectively.

50 Detection devices 51, 55 Tubes 52, 52A, 52B Microphones 53, 53A, 53B Speakers 54 Control device 60 Abnormal sound detection unit 61 First abnormality determination unit 62 Confirmation sound output control unit 63 Reflected sound detection unit 64 Second abnormality determination unit 65 Confirmation sound detector

Claims (13)

A sound collecting means for collecting sound transmitted through the hollow tube is disposed at one end of the hollow tube having at least one end opened, and the sound is output to at least one of the one end and the other end of the hollow tube. Sound output means is arranged,
A first abnormality determining means for determining that an abnormality has occurred when the sound collecting means has collected an abnormal sound generated when the hollow tube is pressurized;
When the abnormal sound is not collected by the sound collecting means, a sound output control means for outputting a predetermined sound from the sound output means;
Depending on whether or not the predetermined sound is collected by the sound collecting means and the comparison between the predetermined sound collected by the sound collecting means and the predetermined sound output from the sound output means Or whether the reflected sound of the predetermined sound is collected by the sound collecting means and a comparison between the reflected sound and the predetermined sound output from the sound output means. A detection apparatus comprising: a second abnormality determination means for determining occurrence of an abnormality in an empty tube. The sound output means is disposed at the one end, the other end is closed,
The said 2nd abnormality determination means determines that the 1st abnormality generate | occur | produced in the said hollow tube, when the reflected sound of the said predetermined sound is not collected by the said sound collection means. Detection device. When the reflected sound of the predetermined sound is collected by the sound collecting means, the second abnormality determining means determines the intermediate sound according to the comparison between the reflected sound and the predetermined sound output from the sound output means. The detection device according to claim 2, wherein it is determined that a second abnormality has occurred in the empty tube. The second abnormality determining means determines that the hollow tube is normal when the reflected sound of the predetermined sound is collected by the sound collecting means and the result of the comparison is within a predetermined range; When the reflected sound of the predetermined sound is collected by the sound collecting means and the result of the comparison is not within a predetermined range, it is determined that a second abnormality has occurred in the hollow tube. Item 4. The detection device according to Item 3. The sound output means is disposed at the other end,
2. The detection device according to claim 1, wherein the second abnormality determination unit determines that a first abnormality has occurred in the hollow tube when the predetermined sound is not collected by the sound collection unit. When the predetermined sound is collected by the sound collecting means, the second abnormality determining means compares the predetermined sound collected by the sound collecting means with the predetermined sound output from the sound output means. The detection device according to claim 5, wherein it is determined that a second abnormality has occurred in the hollow tube. The second abnormality determining means determines that the hollow tube is normal when the predetermined sound is collected by the sound collecting means and the result of the comparison is within a predetermined range, and the predetermined sound is When the reflected sound is collected by the sound collecting means and the result of the comparison is not within a predetermined range, it is determined that a second abnormality has occurred in the hollow tube. The detection device described. A first sound output means is disposed at the one end, and a second sound output means is disposed at the other end;
The sound output control means causes the first predetermined sound to be output from the first sound output means when the abnormal sound is not collected by the sound collecting means, and the first predetermined sound is not collected by the sound collecting means. A second predetermined sound is output from the second sound output means,
The said 2nd abnormality judgment means judges that the 1st abnormality generate | occur | produced in the said hollow tube, when the reflected sound of the said 2nd predetermined sound is not collected by the said sound collection means. The detection device described. 9. The second abnormality determining means determines that a second abnormality has occurred in the hollow tube when the reflected sound of the second predetermined sound is collected by the sound collecting means. The detection device according to 1. The second abnormality determining means, when the first predetermined sound is collected by the sound collecting means, the first predetermined sound collected by the sound collecting means and the first output outputted from the sound output means. The detection device according to claim 8 or 9, wherein it is determined that a third abnormality has occurred in the hollow tube in accordance with a comparison with a predetermined sound. The second abnormality determining means determines that the hollow tube is normal when the first predetermined sound is collected by the sound collecting means and the result of the comparison is within a predetermined range; The case where a reflected sound of a predetermined sound is collected by the sound collecting means and the result of the comparison is not within a predetermined range, it is determined that a third abnormality has occurred in the hollow tube. 10. The detection device according to 10. A hollow tube having at least one open end;
A sound collecting means disposed at one end of the hollow tube for collecting the sound transmitted through the hollow tube;
The detection device according to any one of claims 1 to 11, further comprising sound output means disposed at at least one of the one end and the other end of the hollow tube and outputting sound. The detection device according to claim 12, wherein a plurality of the sound collecting means and the sound output means are disposed at one end and the other end of the hollow tube.

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