JPWO2014014102A1 - Action detection device and action detection method - Google Patents

Abstract

The action detection device (100) includes a mechanical vibrator (10) attached to a structure, a vibration detection unit (11), and a determination unit (12). The mechanical vibrator (10) vibrates at a predetermined frequency by a predetermined action on the structure. The vibration detector (11) detects the vibration amount of the vibration of the mechanical vibrator (10) propagated to the structure. The determination unit (12) detects that the predetermined action has been performed on the structure by determining whether or not the detected vibration amount exceeds a predetermined threshold value.

Description

  The present invention relates to an action detection device and an action detection method for detecting a predetermined action.

  From the viewpoint of crime prevention or the like, an apparatus and a method for detecting a predetermined action have been proposed. For example, Patent Document 1 discloses an apparatus for detecting an action of breaking glass (glass breaking). This apparatus detects glass breakage by converting the vibration of the glass plate into a voltage signal and comparing the value of a predetermined frequency component extracted from the voltage signal with a threshold value.

JP 2005-78500 A

  In the device disclosed in Patent Document 1, for example, when resonance occurs in a window glass or the like due to knocking or the like, a signal similar to that in the case where a breaking action is performed is detected. If a vibration signal similar to the case where the detection target action is performed is detected by an action other than the detection target, erroneous detection increases.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide an action detection apparatus and an action detection method for overcoming the above problems and discriminating an action to be detected with high accuracy.

In order to achieve the above object, an action detection apparatus according to the first aspect of the present invention provides:
A mechanical vibrator attached to a structure and oscillating at a predetermined frequency by a predetermined action on the structure;
Detecting means for detecting a vibration amount of the vibration of the mechanical vibrator propagated to the structure;
An action detecting means for detecting that the predetermined action has been performed on the structure by determining whether or not the vibration amount detected by the detecting means has exceeded a predetermined threshold;
It is characterized by that.

In addition, an action detection method according to the second aspect of the present invention includes:
A detection step of detecting a vibration amount of a vibration transmitted to the structure of a mechanical vibrator that is attached to the structure and vibrates at a predetermined frequency by a predetermined action on the structure;
An action detection step of detecting that the predetermined action has been performed on the structure by determining whether or not the vibration amount detected in the detection step exceeds a predetermined threshold,
It is characterized by that.

  According to the action detection device and the action detection method according to the present invention, the action to be detected can be determined with high accuracy.

It is a block diagram which shows the outline of a structure of the action detection apparatus which concerns on Embodiment 1 of this invention. 6 is a schematic diagram illustrating a configuration of a mechanical vibrator according to a second embodiment. FIG. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in a locking action according to the second embodiment. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in a locking action according to the second embodiment. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in a locking action according to the second embodiment. It is a figure which shows the vibration waveform signal of the vibration of the mechanical vibrator | oscillator propagated to the front door in the outer frame upper part of the front door when the locking action was made. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in an unlocking action according to the second embodiment. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in an unlocking action according to Embodiment 2. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in an unlocking action according to the second embodiment. It is a figure which shows the vibration waveform signal of the vibration of the mechanical vibrator | oscillator propagated to the entrance door in the outer frame upper part of the entrance door at the time of unlocking action. It is a flowchart which shows the action detection process which concerns on embodiment of this invention. It is a figure which shows the parameter of locking determination. It is a figure which shows the parameter of unlocking determination. 6 is a schematic diagram illustrating a configuration of a mechanical vibrator according to a third embodiment. FIG. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in a locking action according to a third embodiment. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in a locking action according to a third embodiment. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in a locking action according to a third embodiment. It is a figure which shows the vibration waveform signal of the vibration of the mechanical vibrator | oscillator propagated to the front door in the outer frame upper part of the front door when the locking action was made. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in an unlocking action according to Embodiment 3. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in an unlocking action according to Embodiment 3. FIG. 10 is a diagram illustrating an operation of a mechanical vibrator in an unlocking action according to Embodiment 3. It is a figure which shows the vibration waveform signal of the vibration of the mechanical vibrator | oscillator propagated to the entrance door in the outer frame upper part of the entrance door at the time of unlocking action.

  Embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by the following embodiment and drawing. Modifications can be made to the following embodiments and drawings without departing from the scope of the present invention.

(Embodiment 1)
Detection of an action according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the action detection apparatus 100 in the present embodiment includes a mechanical vibrator 10, a vibration detection unit 11, a determination unit 12, and a notification unit 13.

  The mechanical vibrator 10 includes, for example, an elastic member such as a spring and a load member supported by the elastic member. The mechanical vibrator 10 is attached to a wall portion in a structure, a troyoke (strike box) of a lock, or the like. The mechanical vibrator 10 mechanically vibrates when a destructive action is performed on the structure. The magnitude of the acceleration (damped vibration) of the mechanical vibrator 10 and the frequency band in which the vibration occurs vary depending on the action on the structure. Since the mechanical vibrator 10 is attached to the structure, the vibration of the mechanical vibrator 10 propagates to the structure. The action detection device 100 discriminates and detects an action performed on the structure based on a difference in the magnitude of acceleration of vibration of the mechanical vibrator 10 propagated to the structure, a frequency band in which the vibration is generated, and the like. Further, when the structural members of the mechanical vibrator 10 or the mechanical vibrator 10 and the structure are contacted a plurality of times due to the action made on the structure or the vibration of the mechanical vibrator 10, a plurality of damped vibrations are applied to the mechanical vibrator 10. Occur. In this case, the action detection device 100 detects an action performed on the structure based on the number of occurrences and the generation interval of each damped vibration in the structure.

  In addition, when detecting a plurality of detection target actions (destructive action, locking action, etc.), the mechanical vibrator 10 has characteristics of damped vibration (for example, amplitude and frequency at which vibration is generated) for each detection target action. By adopting a structure in which the band, the number of occurrences, and the occurrence interval are different, the action detection device 100 can detect each of a plurality of detection target actions. For example, the natural frequency of a spring depends on the spring dimensions. Therefore, when one of the plurality of damped vibrations includes free vibration of the elastic member (spring), the action detection device 100 including the plurality of springs having different dimensions discriminates the plurality of detection target actions, Each of the detection target actions can be detected. In addition, when the mechanical vibrator 10 and the structure are contacted a plurality of times due to the vibration of the mechanical vibrator 10, the generation interval of the damped vibration varies depending on the geometric dimension (mechanical characteristics) of the mechanical vibrator 10. Therefore, the detection target action can be detected with high accuracy by discriminating the detection target action, the action other than the detection target, and irregularly generated disturbance (vibration caused by wind, etc.) according to the generation interval of the damped vibration. The operation and specific configuration of the mechanical vibrator 10 will be described later.

The vibration detection unit 11 measures the vibration amount of the structure to which the mechanical vibrator 10 is attached. The vibration detection unit 11 detects the vibration of the mechanical vibrator 10 that has propagated to the structure out of the measured amount of vibration of the structure. Furthermore, the vibration detection unit 11 outputs a digital signal (vibration waveform signal) representing the vibration amount of the vibration of the mechanical vibrator 10 propagated to the structure to the determination unit 12.
The vibration detection unit 11 includes, for example, a vibration sensor 11a, an A / D converter (analog-digital converter) 11b, and a filter 11c. The vibration sensor 11a measures acceleration, speed, displacement, and the like as vibration amounts. The kind of vibration sensor 11a is not limited. For example, the vibration sensor 11a is an acceleration sensor, a speed sensor, or a displacement sensor. The acceleration sensor is preferably a piezoelectric acceleration sensor with a built-in signal amplification circuit. The vibration detector 11 is preferably one that has high sensitivity and can measure signals in a wide frequency band. The vibration detection unit 11 is installed in the structure. The installation location of the vibration detection unit 11 is not particularly limited. The vibration detection part 11 is installed in the suitable location of a structure according to a detection object action.

  The filter 11c removes signal components of frequencies such as vibration due to disturbance and vibration of the structure itself due to action on the structure. The frequency characteristic of the filter 11c is appropriately selected depending on the purpose and environment. For example, the filter 11c includes a low-pass filter, a high-pass filter, and a band-pass filter. The pass frequency band of the filter 11c is, for example, 10 Hz to 1 kHz. By making the frequency band of the analog vibration waveform signal narrow, the sampling frequency in A / D conversion can be reduced. As a result, the A / D converter 11b can be configured from an inexpensive A / D converter with low power consumption. The A / D converter 11b only needs to convert an analog vibration waveform signal into a digital vibration waveform signal. For example, the A / D converter 11b is composed of a known A / D converter.

  The filter 11c is composed of an analog filter or a digital filter. The analog filter excludes unnecessary analog signals in the analog signal measured by the vibration sensor 11a. The digital filter excludes unnecessary digital signals from the digital signal converted by the A / D converter 11b. For example, by configuring the filter 11c from a digital band pass filter, a signal component in a specific frequency band can be extracted from the vibration waveform signal. For example, the frequency band of the digital bandpass filter is a characteristic vibration waveform signal (a vibration waveform signal in a specific frequency band including the natural vibration frequency of the mechanical vibrator 10) that has propagated to the structure. Set to extract components. When the vibration frequency of the mechanical vibrator 10 propagated to the structure is 700 Hz and 2 kHz, the frequency band of the digital bandpass filter is set to 500 Hz to 900 Hz and 1.5 kHz to 2.5 kHz. The characteristic vibration waveform signal (vibration waveform signal in a specific frequency band) of the propagated vibration of the mechanical vibrator 10 can be extracted.

  The discriminating unit 12 discriminates whether or not the vibration of the mechanical vibrator 10 propagated to the structure is a vibration generated by the detection target action from the vibration waveform signal (vibration waveform data) output by the vibration detection unit 11. Is detected. Specifically, the determination unit 12 determines the presence / absence of the detection target action by determining whether a value (for example, an amplitude value) represented by the vibration waveform signal acquired from the vibration detection unit 11 exceeds a predetermined threshold. To do. Further, the determination unit 12 may determine the presence / absence of the detection target action based on the number of times that the predetermined threshold is exceeded. Further, the determination unit 12 determines whether or not there is an action to be detected by determining whether or not the value represented by the vibration waveform signal exceeds a predetermined second threshold within a predetermined time after the predetermined first threshold is exceeded. It may be determined. As a result, it is possible to easily discriminate the disturbance to be detected from the irregularly generated disturbance or the like, and it is possible to detect a plurality of detection target actions with high accuracy.

In the present embodiment, a characteristic vibration waveform signal (vibration waveform signal in a specific frequency band) of the vibration of the mechanical vibrator 10 propagated to the structure is extracted by the filter 11c. Therefore, the determination unit 12 represents the vibration waveform signal of the vibration of the mechanical vibrator 10 propagated to the structure by determining whether or not the value represented by the vibration waveform signal output from the vibration detection unit 11 exceeds the threshold value. It can be determined whether or not the value exceeds a threshold value. However, the determination unit 12 may perform FFT (Fast Fourier Transform) processing or the like on the vibration amount measured by the vibration detection unit 11 to obtain the vibration amount of the vibration of the mechanical vibrator 10 that has propagated to the structure. .
When the detection target action is detected by the determination unit 12, the notification unit 13 notifies the installer or the like of the action detection device 100 to that effect.

Operation | movement of the action detection apparatus 100 which has said structure is demonstrated.
When vibration occurs in the structure to which the mechanical vibrator 10 is attached, the mechanical vibrator 10 vibrates. Since the mechanical vibrator 10 is attached to the structure, the vibration of the mechanical vibrator 10 propagates to the structure. The vibration detection unit 11 detects the vibration amount of the vibration of the mechanical vibrator 10 that has propagated to the structure. The vibration detector 11 outputs a vibration waveform signal (vibration waveform data) of the vibration amount of the vibration of the mechanical vibrator 10. The determination unit 12 determines whether or not the vibration amount value represented by the vibration waveform signal output from the vibration detection unit 11 exceeds a predetermined threshold value. The determination unit 12 detects a detection target action when the value of the vibration amount represented by the vibration waveform signal exceeds a predetermined threshold. When the determination unit 12 detects the detection target action, the notification unit 13 notifies the installer of the action detection device 100 to that effect.

  Since the vibration of the mechanical vibrator 10 varies depending on the action on the structure, the action detection device 100 can detect the detection target action with high accuracy. Moreover, since the action detection apparatus 100 can discriminate | determine a detection target action with the vibration amount of a some vibration, the action detection apparatus 100 can detect a detection target action with high precision. Furthermore, since the action detection apparatus 100 can determine the detection target action based on a plurality of vibration characteristics (amplitude, frequency band in which vibration occurs, number of occurrences, generation interval), the action detection apparatus 100 can accurately detect the detection target action. It can be detected.

(Embodiment 2)
In the present embodiment, the case where an unlocking action is performed on the entrance door (structure) will be specifically described. In the present embodiment, the vibration detection unit 11 includes a piezoelectric acceleration sensor incorporating a signal amplification circuit, an A / D converter 11b, an analog bandpass filter, and a digital bandpass filter.

  The number of analog-digital processing bits in the A / D converter 11b is 12 bits, and the sampling frequency is 20 kHz. Further, the A / D converter 11b and the band pass filter are mounted on the same substrate. The substrate on which the A / D converter 11b and the bandpass filter are mounted and the vibration sensor are electrically connected by cable wiring. The bandpass filter includes an analog bandpass filter having a passband of 10 Hz to 5 KHz and a digital bandpass filter having a passband of 500 Hz to 1 KHz. By these band pass filters, a characteristic vibration signal (vibration waveform signal in a specific frequency band) of the vibration of the mechanical vibrator 10 propagated to the structure is extracted.

  The entrance door is made of steel, and the lock of the entrance door is a dead bolt type. The dimension of the entrance door is vertical: about 1800 mm × width: about 1000 mm. A vibration sensor is attached to the upper part of the outer frame of the entrance door (structure) with an adhesive.

  As shown in FIG. 2, the mechanical vibrator 10 includes a leaf spring 3, a permanent magnet 4, a first protrusion 5, and a second protrusion 6. The leaf spring 3 is made of phosphor bronze. The permanent magnet 4 is composed of a ferrite magnet. Furthermore, the 1st projection part 5 and the 2nd projection part 6 are comprised from a magnetic material. The leaf spring 3 is substantially L-shaped and is fixed to the troyoke 1 on one side. The permanent magnet 4 is attached to the leaf spring 3. Further, the leaf spring 3 has a hole in a region facing the first protrusion 5.

  In addition, the leaf | plate spring 3, the permanent magnet 4, the 1st projection part 5, and the 2nd projection part 6 are not limited to the above-mentioned structure, You may be comprised from various materials. Moreover, the attachment position of the leaf | plate spring 3, the permanent magnet 4, the 1st projection part 5, and the 2nd projection part 6 is not limited to the position shown in FIG. For example, the leaf spring 3 may be fixed to the trolley 1 at the end in the left-right direction, and the first protrusion 5 and the second protrusion 6 may be arranged in the left-right direction.

(Locking action)
The operation of the mechanical vibrator 10 having the above-described configuration will be described for a case where the door door is locked. 3 to 5 show the operation of the mechanical vibrator 10 in the locking action.

As shown in FIG. 2, the leaf spring 3 of the mechanical vibrator 10 does not contact the first protrusion 5, the second protrusion 6, and the trowel 1 when the lock is unlocked.
Due to the locking action, the dead bolt 2 is gradually displaced in the direction of the trolley 1. When the distance between the dead bolt 2 and the trowel 1 reaches a predetermined distance, the permanent magnet 4 of the mechanical vibrator 10 is attracted to the dead bolt 2 by the magnetic force as shown in FIG. Bolt 2 comes into contact. Further, when the dead bolt 2 is displaced in the direction of the trowel 1, the leaf spring 3 is urged in the direction of the troyo 1 by the dead bolt 2, and the leaf spring 3 comes into contact with the second protrusion 6 as shown in FIG. . Then, as shown in FIG. 5, the dead bolt 2 comes into contact with the first protrusion 5.

  The vibration generated in the mechanical vibrator 10 by the operation of the series of mechanical vibrators 10 will be described. FIG. 6 shows a vibration waveform signal of the vibration of the mechanical vibrator 10 propagated to the entrance door at the upper part of the outer frame of the entrance door when the locking action is performed.

  In a series of operations of the mechanical vibrator 10, the contact is caused by the contact between the permanent magnet 4 and the dead bolt 2, the contact between the second protrusion 6 and the leaf spring 3, and the contact between the first protrusion 5 and the leaf spring 3. Damping vibration is generated in the mechanical vibrator 10. Each damped vibration propagates to the entrance door. That is, the damped vibration caused by the contact between the permanent magnet 4 and the dead bolt 2, the contact between the second protrusion 6 and the leaf spring 3, and the contact between the first protrusion 5 and the leaf spring 3 is It is detected at the upper part of the frame (FIG. 6).

  Generally, when the dead bolt 2 is displaced to a predetermined position, the dead bolt 2 is displaced at a constant speed by the lock cam mechanism regardless of the excitation force by the operator. Therefore, when the dimension (characteristic) of the leaf spring 3 is set, the damping caused by the contact between the second protrusion 6 and the leaf spring 3 is caused by the generation of the damping vibration caused by the contact between the permanent magnet 4 and the dead bolt 2. The time until the occurrence of vibration (time Ta1 in FIG. 6) is also set. Similarly, the time from the occurrence of the contact between the second protrusion 6 and the leaf spring 3 to the occurrence of the damped vibration caused by the contact between the first protrusion 5 and the leaf spring 3 (time Ta2 in FIG. 6) is similarly set. Is done.

The discrimination of the vibration amount and the detection of the locking action described above will be described.
The vibration detection unit 11 measures the amount of vibration of the entrance door. The vibration detection unit 11 extracts a component of a vibration waveform signal in a specific frequency band by a band pass filter. The vibration detection unit 11 outputs the extracted component of the vibration waveform signal in the specific frequency band to the determination unit 12. The discriminating unit 12 discriminates whether or not the amount of vibration exceeds a predetermined threshold from the value represented by the vibration waveform signal output from the vibration detecting unit 11, and detects the locking action.
Specifically, first, it is determined whether or not the amount of vibration exceeds a predetermined threshold (determination J1). When it is determined in the determination J1 that the vibration amount exceeds a predetermined threshold, it is determined whether or not the vibration amount after the time Ta1 has exceeded a predetermined threshold after the vibration amount exceeds the predetermined threshold (determination J2). Further, in the determination J2, when it is determined that the vibration amount has exceeded a predetermined threshold, it is determined whether or not the vibration amount after the time Ta2 has exceeded a predetermined threshold after the vibration amount has exceeded the predetermined threshold (discrimination J3). ). In the determination J3, when it is determined that the vibration amount exceeds the predetermined threshold, the determination unit 12 detects the locking action.

  Since the discrimination | determination part 12 detects a locking action by several discrimination | determination (discrimination J1-J3), it can detect a locking action with high precision. In the determinations J2 and J3, it may be determined whether or not the vibration amount exceeds a predetermined threshold in a predetermined period including the time Ta1 and the time Ta2. This can prevent erroneous detection caused by individual differences among actors.

(Unlocking act)
Next, the operation of the mechanical vibrator 10 will be described for a case where an unlocking action is performed on the entrance door. 7 to 9 show the operation of the mechanical vibrator 10 in the unlocking action.

  In the unlocking action, the dead bolt 2 moves in a direction away from the trolley 1. When the dead bolt 2 moves in a direction away from the trolley 1, the leaf spring 3 moves together with the dead bolt 2 by the attractive force between the permanent magnet 4 and the dead bolt 2 as shown in FIG. And the leaf | plate spring 3 leaves | separates from the 1st projection part 5 and the 2nd projection part 6 in order of the 1st projection part 5 and the 2nd projection part 6. FIG. Further, when the dead bolt 2 is separated from the troyoke 1 by a predetermined distance, the return force of the leaf spring 3 becomes larger than the attractive force between the permanent magnet 4 and the dead bolt 2, so that the permanent bolt 4 becomes permanent as shown in FIG. The magnet 4 and the dead bolt 2 are separated. In this case, free vibration depending on dimensions (characteristics) is generated in the leaf spring 3, and the leaf spring 3 collides with the second protrusion 6 as shown in FIG. 9.

  The vibration generated in the mechanical vibrator 10 by the operation of the series of mechanical vibrators 10 will be described. FIG. 10 shows a vibration waveform signal of the vibration of the mechanical vibrator 10 propagated to the front door in the upper part of the outer frame of the front door when the unlocking action is performed.

  In a series of operations of the mechanical vibrator 10, vibration caused by free vibration of the leaf spring 3 and damped vibration caused by collision between the leaf spring 3 and the second protrusion 6 are generated in the mechanical vibrator 10. Since each vibration generated in the mechanical vibrator 10 propagates to the entrance door, similarly to the locking action, the vibration caused by the free vibration of the leaf spring 3 and the collision between the leaf spring 3 and the second protrusion 6 occur. The damped vibration is detected at the upper part of the outer frame of the entrance door (FIG. 10).

  In the unlocking action, as in the case of the locking action, the size (characteristic) of the leaf spring 3 is set, so that the leaf spring 3 and the second protrusion are prevented from generating vibration due to the free vibration of the leaf spring 3. The time until the occurrence of the damped vibration due to the collision 6 (time Tb in FIG. 10) is set.

  As in the case of the locking action, the determination unit 12 determines whether or not the amount of vibration has exceeded a predetermined threshold from the value represented by the vibration waveform signal output by the vibration detection unit 11, and detects the locking action. That is, the determination unit 12 first determines whether or not the amount of vibration exceeds a predetermined threshold (determination J4). If it is determined in the determination J4 that the vibration amount has exceeded a predetermined threshold, it is determined whether or not the vibration amount after the time Tb has exceeded a predetermined threshold after the vibration amount has exceeded the predetermined threshold (determination J5). In the determination J5, when it is determined that the vibration amount exceeds a predetermined threshold, the determination unit 12 detects the unlocking action.

  Since the determination unit 12 detects the unlocking action by a plurality of determinations (determinations J4 and J5), the unlocking action can be detected with high accuracy. In the determination J5, it may be determined whether or not the vibration amount exceeds a predetermined threshold in a predetermined period including the time Tb.

By configuring the action detection device 100 as described above, it is possible to detect whether the door is locked or unlocked.
FIG. 11 shows an action detection process executed by action detection apparatus 100 according to the present embodiment. The action detection process is started when the user performs an operation to turn on the power of the action detection apparatus 100, and is repeatedly executed at predetermined time intervals (for example, every several ms). When the action detection process is started, the vibration detection unit 11 measures the vibration of the upper part of the outer door frame (structure) and detects the vibration amount of the vibration of the mechanical vibrator 10 that has propagated to the structure. Then, a vibration waveform signal representing the vibration amount of the vibration of the mechanical vibrator 10 propagated to the structure is output to the determination unit 12 (step S101). The determination unit 12 detects whether or not a locking action has been performed by performing determinations J1 to J3 from the acquired vibration waveform signal (step S102). When the locking action is detected (step S102: YES), the notification unit 13 notifies the user that the locking action has been detected (step S103), and the process ends. Moreover, the discrimination | determination part 12 detects whether the unlocking act was made by performing discrimination | determination J4 and J5 from the acquired vibration waveform signal, when a locking act is not detected (step S102: NO) (step S104). . When the unlocking action is detected (step S104: YES), the notification unit 13 notifies the user that the unlocking action has been performed (step S105), and the process ends. Furthermore, the determination part 12 complete | finishes this process, when unlocking action is not detected (step S104: NO).

  In the case of detecting two or more detection target actions, as described above, it may be determined whether or not two or more detection target actions have been performed in a predetermined order, and the state of the structure (unlocked state) , Locking state, etc.) may be stored in advance, and the stored state may be combined with the determination of vibration by the determination unit 12 to determine whether or not the action to be detected has been performed. In addition, the state of the structure may be a state set from a detection target action detected by the action detection device 100, or may be a state set by an output from another sensor that detects the state. Good.

About the action detection apparatus 100 in Embodiment 2, the detection performance of locking / unlocking was confirmed. 12 and 13 show the determination condition for locking and the determination condition for unlocking.
In FIG. 12, the threshold value Ra1 is a threshold value for determining whether or not a damped vibration caused by the contact between the permanent magnet 4 and the dead bolt 2 has occurred (whether or not the vibration amount has exceeded a predetermined threshold value) (determination J11). is there. The threshold value Ra2 is a threshold value for determining whether or not a damped vibration caused by the contact between the second protrusion 6 and the leaf spring 3 has occurred (determination J21). The threshold value Ra3 is a threshold value for determining whether or not a damped vibration caused by the contact between the first protrusion 5 and the leaf spring 3 has occurred (determination J31).

  In FIG. 12, time Ta <b> 1 is the time from the contact between the permanent magnet 4 and the dead bolt 2 to the contact between the second protrusion 6 and the leaf spring 3. That is, when a locking action is performed, a damped vibration due to the contact between the second protrusion 6 and the leaf spring 3 occurs after a time Ta1 from the occurrence of the damped vibration due to the contact between the permanent magnet 4 and the dead bolt 2. To do. In the present embodiment, whether or not a damped vibration caused by the contact between the second protrusion 6 and the leaf spring 3 occurs (whether or not the vibration amount exceeds the threshold value Ra2) in a period of 5 mS before and after the time Ta1. Then, the discrimination unit 12 is discriminated (determination 21).

The time Ta2 is the time from the contact between the second protrusion 6 and the leaf spring 3 until the contact between the first protrusion 5 and the leaf spring 3 occurs. That is, when the locking action is performed, the damped vibration due to the contact between the first protrusion 5 and the leaf spring 3 after the time Ta2 from the occurrence of the damped vibration due to the contact between the second protrusion 6 and the leaf spring 3. Will occur. In the present embodiment, whether or not a damped vibration caused by the contact between the first protrusion 5 and the leaf spring 3 occurs (whether or not the vibration amount exceeds the threshold Ra3) in a period of 3 mS before and after the time Ta2. Then, the discrimination unit 12 is discriminated (discrimination J31).
In the detection of the locking action, when the vibration amount exceeds the threshold value Ra1 (determination J11), it is determined in the determination J21 that the vibration amount exceeds the threshold value Ra2, and the determination J31 determines that the vibration amount exceeds the threshold value Ra3. Then, the determination unit 12 is made to detect that the locking action has been performed.

  In FIG. 13, the threshold value Rb1 is a threshold value for determining whether or not free vibration of the leaf spring 3 due to the separation of the permanent magnet 4 and the dead bolt 2 has occurred (determination J41). The threshold value Rb2 is a threshold value for determining whether or not a damped vibration caused by the contact between the leaf spring 3 and the second protrusion 6 has occurred (determination J51).

  The time Tb1 is the time from the occurrence of free vibration of the leaf spring 3 due to the separation of the permanent magnet 4 and the dead bolt 2 until the contact between the leaf spring 3 and the second protrusion 6 occurs. That is, when the unlocking action is performed, the contact between the leaf spring 3 and the second protrusion 6 is made after the time Tb1 from the occurrence of free vibration of the leaf spring 3 due to the separation of the permanent magnet 4 and the dead bolt 2. The resulting damped vibration occurs. In the present embodiment, whether or not a damped vibration caused by the contact between the leaf spring 3 and the second protrusion 6 occurs (whether or not the vibration amount exceeds the threshold value Rb2) in a period of 5 mS before and after the time Tb1. Then, the discrimination unit 12 is discriminated (determination 51).

  In the detection of the unlocking action, it is determined that the vibration amount exceeds the threshold value Rb1 (Determination J41), and when it is determined in the determination J51 that the vibration amount exceeds the threshold value Rb2, it is detected that the determination unit 12 has performed the unlocking action. Let

  Under the above conditions, the locking action and the unlocking action were performed 10 times each on the entrance door where the action detection device 100 according to the present embodiment was installed. Moreover, the door was opened and closed and the door chain was opened and closed 10 times each as a disturbance. As a result, no locking action or unlocking action was detected due to disturbance. In addition, it was detected that all locking actions on the front door were performed. Furthermore, all unlocking actions on the front door were detected as being unlocked.

  As described above, the action detection device 100 according to the present embodiment can identify the action to be detected with high accuracy. In FIGS. 12 and 13, the threshold value is set to a positive value, but the threshold value may be set to a negative value. The threshold value may be an absolute value. A threshold and time for determining whether or not an action to be detected has been performed can be set by experiment or the like.

(Embodiment 3)
The action detection apparatus according to the third embodiment has the same configuration as the action detection apparatus 100 according to the second embodiment except that the mechanical vibrator 10 is different. Therefore, the description of the configuration of the third embodiment other than the mechanical vibrator 10 is omitted because it is redundant.

  As shown in FIG. 14, the mechanical vibrator 10 according to the third embodiment includes leaf springs 3a and 3b, permanent magnets 4a and 4b, a first protrusion 5a, a second protrusion 6a, a fixed protrusion 7, and a fastener. 8a and 8b. The leaf springs 3a and 3b are made of phosphor bronze. The permanent magnets 4a and 4b are composed of ferrite magnets. Moreover, the 1st projection part 5a and the 2nd projection part 6a are comprised from a magnetic material. Further, the fixed protrusion 7 is made of a material having high rigidity such as iron. The fasteners 8a and 8b fix the leaf springs 3a and 3b to the trolley 1, respectively.

In the present embodiment, the rigidity of the leaf spring 3a is larger than the rigidity of the leaf spring 3b. On the other hand, the permanent magnet 4a and the permanent magnet 4b are the same permanent magnet. However, the attractive force by the permanent magnet 4a may be stronger than the attractive force by the permanent magnet 4b, and the leaf spring 3a and the leaf spring 3b may be configured to have the same rigidity.
The leaf springs 3a and 3b, the permanent magnets 4a and 4b, the first protrusion 5a, the second protrusion 6a, and the fixed protrusion 7 are not limited to the above-described configuration, and may be formed of various materials. Further, the attachment positions of the leaf springs 3a, 3b and the like are not limited to the configuration shown in FIG. 14 and may be attached in the opposite vertical direction. Further, the leaf springs 3a, 3b, etc. may be arranged in the left-right direction.

(Locking action)
The operation of the mechanical vibrator 10 having the above-described configuration will be described for a case where the door door is locked. 14 to 17 show the operation of the mechanical vibrator 10 in the locking action.

As shown in FIG. 14, the leaf springs 3 a and 3 b of the mechanical vibrator 10 according to the third embodiment do not contact the first protrusion 5 a, the second protrusion 6 a, and the Troyoke 1 when the lock is unlocked.
Due to the locking action, the dead bolt 2 is gradually displaced in the direction of the trolley 1. When the distance between the dead bolt 2 and the trolley 1 reaches a predetermined distance, as shown in FIG. 15, the permanent magnet 4b is attracted to the dead bolt 2 by a magnetic force, and the permanent magnet 4b and the dead bolt 2 come into contact with each other. . Next, as shown in FIG. 16, the permanent magnet 4a is attracted to the dead bolt 2 by a magnetic force, and the permanent magnet 4a and the dead bolt 2 come into contact with each other. When the dead bolt 2 is further displaced in the direction of the trowel 1, as shown in FIG. 17, the leaf spring 3a and the leaf spring 3b are urged in the direction of the troyo 1 by the dead bolt 2, and the dead bolt 2 is The fixed protrusion 7 comes into contact.

The vibration generated in the mechanical vibrator 10 by the operation of the series of mechanical vibrators 10 will be described. FIG. 18 shows a vibration waveform signal of the vibration of the mechanical vibrator 10 propagated to the entrance door at the upper part of the outer frame of the entrance door when the locking action is performed.
In a series of operations of the mechanical vibrator 10, damped vibration caused by contact between the permanent magnet 4b and the dead bolt 2, contact between the permanent magnet 4a and the dead bolt 2, and contact between the dead bolt 2 and the fixed projection 7 is Occurs in the mechanical vibrator 10. Each damped vibration propagates to the entrance door. That is, the damped vibration caused by the contact between the permanent magnet 4b and the dead bolt 2, the contact between the permanent magnet 4a and the dead bolt 2, and the contact between the dead bolt 2 and the fixed projection 7 is detected at the upper part of the outer frame of the entrance door. (FIG. 18).

  Generally, when the dead bolt 2 is displaced to a predetermined position, the dead bolt 2 is displaced at a constant speed by the lock cam mechanism regardless of the excitation force by the operator. Accordingly, when the dimensions (characteristics) of the leaf springs 3a and 3b are set, the damping caused by the contact between the permanent magnet 4a and the dead bolt 2 is caused by the generation of the damping vibration caused by the contact between the permanent magnet 4b and the dead bolt 2. The time until the occurrence of vibration (time Tc1 in FIG. 18) is also set. Also, the time from the generation of the damped vibration due to the contact between the permanent magnet 4a and the dead bolt 2 to the generation of the damped vibration due to the contact between the dead bolt 2 and the fixed projection 7 (time Tc2 in FIG. 18) It is set similarly.

  Therefore, the action detection device in the present embodiment detects the locking action by determining the vibration amount from the time Tc1, Tc2 and a predetermined threshold value for determining the vibration amount, as in the second embodiment. it can.

(Unlocking act)
The operation of the mechanical vibrator 10 will be described for the case where the door door is locked. 19 to 21 show the operation of the mechanical vibrator 10 in the unlocking action.
In the unlocking action, the dead bolt 2 moves in a direction away from the trolley 1. When the dead bolt 2 moves in a direction away from the trolley 1, the leaf springs 3a and 3b move together with the dead bolt 2 by the attractive force between the permanent magnets 4a and 4b and the dead bolt 2 as shown in FIG. When the dead bolt 2 is separated from the trowel 1 to a predetermined distance, the restoring force of the leaf spring 3a is larger than the attractive force between the permanent magnet 4a and the dead bolt 2, so as shown in FIG. The permanent magnet 4a is separated from the dead bolt 2. In this case, free vibration depending on the dimensions (characteristics) is generated in the leaf spring 3 a, and the first protrusion 5 a collides with the trojoke 1. Further, when the dead bolt 2 is separated from the trolley 1, the return force of the leaf spring 3b becomes larger than the attractive force of the permanent magnet 4b and the dead bolt 2, so that the permanent magnet 4b is removed as shown in FIG. Move away from bolt 2. Also in this case, free vibration depending on the dimensions (characteristics) is generated in the leaf spring 3b, and the second protrusion 6a collides with the trolley 1.

  The vibration generated in the mechanical vibrator 10 and the vibration generated in the upper part of the outer frame of the entrance door due to the series of operations of the mechanical vibrator 10 will be described. FIG. 22 shows a vibration waveform signal of the vibration of the mechanical vibrator 10 propagated to the structure in the upper part of the outer frame of the entrance door when the unlocking action is performed.

  In a series of operations of the mechanical vibrator 10, vibration caused by free vibration of the leaf spring 3a, damped vibration caused by collision between the first protrusion 5a and the troyoke 1, vibration caused by free vibration of the leaf spring 3b, second Damped vibration caused by the collision between the protrusion 6 a and the trojoke 1 is generated in the mechanical vibrator 10 in order. Each vibration generated in the mechanical vibrator 10 propagates to the entrance door. Therefore, similarly to the locking action, the vibration caused by the free vibration of the leaf spring 3a, the damped vibration caused by the collision between the first protrusion 5a and the troyoke 1, the vibration caused by the free vibration of the leaf spring 3b, the second protrusion Damped vibration caused by the collision between 6a and Troyoke 1 is sequentially detected at the upper part of the outer frame of the entrance door.

  Generally, when the dead bolt 2 is displaced to a predetermined position, the dead bolt 2 is displaced at a constant speed by the lock cam mechanism regardless of the excitation force by the operator. Therefore, when the dimension of the leaf spring 3a is set, the time from the occurrence of free vibration of the leaf spring 3a to the occurrence of the damped vibration due to the collision between the first protrusion 5a and the troyoke 1 (time Td1 in FIG. 22) is also obtained. Is set. Further, by setting the dimensions (characteristics) of the leaf springs 3a and 3b, the time from the occurrence of vibration due to the collision between the first protrusion 5a and the troyoke 1 to the occurrence of free vibration of the leaf spring 3b (FIG. The time Td2) at 22 is also set. Furthermore, when the dimension of the leaf spring 3b is set, the time from the occurrence of free vibration of the leaf spring 3b to the occurrence of damped vibration due to the collision between the second protrusion 6a and the troyoke 1 (time Td3 in FIG. 22) is also obtained. Is set.

  Therefore, the action detection device in the present embodiment, as in the second embodiment, detects the unlocking action by determining the vibration amount from the time Td1 to Td3 and a predetermined threshold value for determining the vibration amount. It can be detected.

  In the second and third embodiments, the mechanical vibrator 10 vibrates twice or more by the detection target action, but the mechanical vibrator 10 may vibrate only once by the detection target action. The action to be detected can be detected by determining whether or not the vibration amount represented by the vibration signal in the specific frequency band detected by the vibration detection unit 11 exceeds a predetermined threshold.

  In the second and third embodiments, the mechanical vibrator 10 is attached to the trolley 1, but the mechanical vibrator 10 may be attached to, for example, a case that houses the dead bolt 2, a window frame, or a wall of a structure. Good.

  In the second and third embodiments, the mechanical vibrator 10 includes the leaf springs 3, 3a, and 3b. However, the mechanical vibrator 10 may include a coil spring instead of the leaf springs 3, 3a, and 3b. The mechanical vibrator 10 may include a coil spring in addition to the leaf springs 3, 3a, and 3b. Further, the mechanical vibrator 10 may include a hook-and-loop fastener or the like instead of the permanent magnets 4, 4a, and 4b. Further, the mechanical vibrator 10 may include a hook-and-loop fastener in addition to the permanent magnets 4, 4a, and 4b.

  A part or all of each of the above embodiments can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A mechanical vibrator attached to a structure and oscillating at a predetermined frequency by a predetermined action on the structure;
Detecting means for detecting a vibration amount of the vibration of the mechanical vibrator propagated to the structure;
An action detecting means for detecting that the predetermined action has been performed on the structure by determining whether or not the vibration amount detected by the detecting means has exceeded a predetermined threshold;
An action detection device characterized by that.

(Appendix 2)
When the predetermined action is performed on the structure, the mechanical vibrator generates a plurality of vibrations.
The action detection apparatus according to attachment 1, wherein the action detection apparatus is provided.

(Appendix 3)
The number of vibrations generated by the mechanical vibrator when the predetermined first action is performed on the structure, and the mechanical vibrator is generated when the predetermined second action is performed on the structure. Unlike the number of occurrences of vibration,
The action detection means determines the first action and the second action, and detects each as the different predetermined action,
The action detection device according to attachment 1 or 2, characterized in that.

(Appendix 4)
The action detecting means determines whether or not the detected vibration amount exceeds a predetermined first threshold value,
When it is determined that the detected vibration amount has exceeded the first threshold value, the detected vibration amount after a predetermined time has elapsed since the detected vibration amount has exceeded the first threshold value. Detecting that the predetermined action has been performed on the structure portion by determining whether or not the predetermined second threshold has been exceeded.
The action detection device according to any one of supplementary notes 1 to 3, characterized in that:

(Appendix 5)
The detection means attenuates a frequency domain component other than the frequency domain of the vibration of the mechanical vibrator propagated to the structure, and detects the vibration amount.
The action detection device according to any one of supplementary notes 1 to 4, characterized in that:

(Appendix 6)
The mechanical vibrator has a first elastic body that resonates when a predetermined first specific action is performed on the structure, and a natural vibration frequency different from a natural vibration frequency of the first elastic body, A second elastic body that resonates when a predetermined second specific action is performed on the structure,
The action detection means determines the first specific action and the second specific action, and detects each as the different predetermined action,
The action detection device according to any one of appendices 1 to 5, characterized in that:

(Appendix 7)
The mechanical vibrator is attached to the outer frame of the entrance door,
The action detection device according to any one of appendices 1 to 6, characterized in that:

(Appendix 8)
The mechanical vibrator is attached to the front door lock,
The action detection device according to any one of appendices 1 to 6, characterized in that:

(Appendix 9)
The mechanical vibrator is attached to a troyoke,
The action detection apparatus according to claim 1, wherein the action detection apparatus is an operation detection apparatus.

(Appendix 10)
A detection step of detecting a vibration amount of a vibration transmitted to the structure of a mechanical vibrator that is attached to the structure and vibrates at a predetermined frequency by a predetermined action on the structure;
An action detection step of detecting that the predetermined action has been performed on the structure by determining whether or not the vibration amount detected in the detection step exceeds a predetermined threshold,
An action detection method characterized by that.

(Appendix 11)
A contact portion that contacts a displacement object that is displaced between a predetermined first position and a predetermined second position by an operation of the operator;
An elastic body that vibrates naturally at a predetermined frequency, and resonates the elastic body using energy generated by the displacement of the displacement object transmitted by contact between the displacement object and the contact portion; A vibration generating unit that generates vibrations of a specific frequency,
The number of occurrences of damping vibration of the elastic body due to the displacement of the displacement object from the first position to the second position, and the elastic body due to the displacement of the displacement object from the second position to the first position The number of occurrences of damped vibration is different.
A vibration generator characterized by that.

  The above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. In other words, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

  The present invention is based on Japanese Patent Application No. 2012-160818 filed on July 19, 2012. In this specification, the specification, claims, and drawings of Japanese Patent Application No. 2012-160818 are incorporated as a reference.

DESCRIPTION OF SYMBOLS 1 Troyoke 2 Dead bolt 3, 3a, 3b Leaf spring 4, 4a, 4b Permanent magnet 5, 5a 1st projection part 6, 6a 2nd projection part 7 Fixed projection part 8a, 8b Fastener 10 Mechanical vibrator 11 Vibration detection part 11a Vibration sensor 11b Analog-digital converter 11c Filter 12 Discriminating unit 13 Notifying unit 100 Action detecting device

Claims (10)

A mechanical vibrator attached to a structure and oscillating at a predetermined frequency by a predetermined action on the structure;
Detecting means for detecting a vibration amount of the vibration of the mechanical vibrator propagated to the structure;
An action detecting means for detecting that the predetermined action has been performed on the structure by determining whether or not the vibration amount detected by the detecting means has exceeded a predetermined threshold;
An action detection device characterized by that. When the predetermined action is performed on the structure, the mechanical vibrator generates a plurality of vibrations.
The action detection apparatus according to claim 1, wherein: The number of vibrations generated by the mechanical vibrator when the predetermined first action is performed on the structure, and the mechanical vibrator is generated when the predetermined second action is performed on the structure. Unlike the number of occurrences of vibration,
The action detection means determines the first action and the second action, and detects each as the different predetermined action,
The action detection device according to claim 1 or 2, wherein The action detecting means determines whether or not the detected vibration amount exceeds a predetermined first threshold value,
When it is determined that the detected vibration amount has exceeded the first threshold value, the detected vibration amount after a predetermined time has elapsed since the detected vibration amount has exceeded the first threshold value. Detecting that the predetermined action has been performed on the structure portion by determining whether or not the predetermined second threshold has been exceeded.
The action detection device according to any one of claims 1 to 3, wherein The detection means attenuates a frequency domain component other than the frequency domain of the vibration of the mechanical vibrator propagated to the structure, and detects the vibration amount.
The action detection device according to any one of claims 1 to 4, wherein the action detection device according to any one of claims 1 to 4 is provided. The mechanical vibrator has a first elastic body that resonates when a predetermined first specific action is performed on the structure, and a natural vibration frequency different from a natural vibration frequency of the first elastic body, A second elastic body that resonates when a predetermined second specific action is performed on the structure,
The action detection means determines the first specific action and the second specific action, and detects each as the different predetermined action,
The action detection apparatus according to claim 1, wherein the action detection apparatus is an operation detection apparatus. The mechanical vibrator is attached to the outer frame of the entrance door,
The action detection device according to claim 1, wherein the action detection device is a device. The mechanical vibrator is attached to the front door lock,
The action detection device according to claim 1, wherein the action detection device is a device. The mechanical vibrator is attached to a troyoke,
The action detection device according to claim 1, wherein the action detection device is a device. A detection step of detecting a vibration amount of a vibration transmitted to the structure of a mechanical vibrator that is attached to the structure and vibrates at a predetermined frequency by a predetermined action on the structure;
An action detection step of detecting that the predetermined action has been performed on the structure by determining whether or not the vibration amount detected in the detection step exceeds a predetermined threshold,
An action detection method characterized by that.

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