JP7610864B2 - Emergency situation detection device, emergency situation detection system, and emergency situation detection method - Google Patents

Description

The present invention relates to an emergency detection device, an emergency detection system and an emergency detection method.

Devices (e.g., security buzzers) that alert you to physical emergencies such as molestation, stalking, and theft are known.

Patent Document 1 is a background technology in this technical field. Patent Document 1 states that "the mobile terminal device comprises a main body case, an antenna for transmitting and receiving radio waves, and biasing means for biasing a part of the antenna so that it becomes a protrusion that protrudes outside the main body case in a normal state. The mobile terminal device also comprises detection means for detecting when the protrusion has been pushed into the main body case against the bias of the biasing means. If the protrusion is pushed in a predetermined number of times or more within a predetermined time, a crime prevention function is activated."

JP 2005-354382 A

The mobile terminal device disclosed in the prior art document Patent Document 1 activates a crime prevention function when the protrusion is pressed in a predetermined number of times or more within a predetermined time. However, in an emergency situation, it is not always possible to reliably press in the protrusion on the mobile terminal device.

The present invention has been made in consideration of the above-mentioned problems, and aims to provide an emergency detection device, an emergency detection system, and an emergency detection method that can reliably detect an emergency when it occurs and reduce false detections.

In order to solve the above problems, an emergency detection device according to one aspect of the present invention comprises a detection device main body, a vibration detection unit that detects vibrations applied to the detection device main body and outputs a detection signal corresponding to the vibrations, a first threshold determination unit that determines when the magnitude of the detection signal from the vibration detection unit exceeds a first threshold, an interval time measurement unit that measures the time interval between when the first threshold determination unit determines that the magnitude of the detection signal has exceeded the first threshold, and an emergency detection unit that detects an emergency when the number of times that the time interval measured by the interval time measurement unit falls below the second threshold exceeds a predetermined number of times.

The present invention makes it possible to realize an emergency detection device and an emergency detection method that can reliably detect an emergency when it occurs and reduce false detections.

1 is a block diagram showing a functional configuration of an emergency situation detection device according to a first embodiment. 1 is a diagram showing the external appearance of an emergency situation detection device according to a first embodiment. 1 is a diagram illustrating an example of the detection principle of an emergency situation detection device according to a first embodiment. FIG. 5A to 5C are diagrams illustrating another example of the detection principle of the emergency situation detection device according to the first embodiment. 4 is a flowchart for explaining the operation of the emergency detection device according to the first embodiment. FIG. 11 is a block diagram showing a functional configuration of an emergency situation detection device according to a second embodiment. FIG. 11 is a diagram showing the appearance of an emergency situation detection device according to a second embodiment. 13A and 13B are diagrams showing the external and internal appearances of an emergency situation detection device according to a second embodiment. FIG. 11 is a diagram showing a setting screen of a user terminal according to the second embodiment; FIG. 11 is a state transition diagram of an operation mode according to the second embodiment. 10 is a flowchart showing emergency situation determination control according to the second embodiment; 10 is a flowchart showing a remaining charge notification control according to the second embodiment; 13 is a flowchart showing a divine lottery function according to the second embodiment. FIG. 11 is a block diagram showing a functional configuration of an external server according to the second embodiment. 10 is a flowchart showing an SOS notification control according to the second embodiment. 10 is a flowchart showing data analysis control according to the second embodiment. 10 is a flowchart showing remote operation control according to the second embodiment. FIG. 11 is a diagram for explaining remote operation control according to the second embodiment. 10 is a flowchart showing a safety support control according to a second embodiment. FIG. 11 is a diagram showing an example of display of danger spots according to the second embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below does not limit the invention according to the claims, and not all of the elements and combinations thereof described in the embodiment are necessarily essential to the solution of the invention.

In the figures explaining the embodiments, parts having the same functions are given the same symbols and repeated explanations are omitted.

In the following explanation, processing may be described with a "program" as the subject; however, a program is executed by a processor (e.g., a CPU (Central Processing Unit)) to perform a defined process using storage resources (e.g., memory) and/or communication interface devices (e.g., ports) as appropriate, so the subject of the processing may also be the program. Processing described with a program as the subject may also be processing performed by a processor or a computer having that processor.

Figure 1 is a block diagram showing the functional configuration of the emergency detection device of the first embodiment, and Figure 2 is a diagram showing the appearance of the emergency detection device of the first embodiment.

The emergency detection device 1 of this embodiment is configured with various devices housed in a box-shaped device main body 2, as shown in Figure 2.

The emergency detection device 1 has a processor 10, a memory 11, a push button switch 12, an acceleration sensor module 13, a GPS module 14, a communication module 15, a speaker module 16 and a battery 17.

The processor 10 is, for example, a central processing unit (CPU), a graphics processing unit (GPU), a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), etc. The memory 11 includes, for example, a semiconductor storage medium such as a random access memory (RAM), a read only memory (ROM), or a solid state drive (SSD).

Programs such as firmware are stored in memory 11. When the emergency detection device 1 starts operating (e.g., when the power is turned on), the programs such as firmware are read from this memory 11 and executed, and the emergency detection device 1 is controlled by implementing various functions described below. In addition to the programs, memory 11 also stores data and the like necessary for each process of the emergency detection device 1.

The push button switch 12 is arranged so as to be exposed on the outer surface of the device main body 2 as shown in Fig. 2. When an alarm sound is output from the speaker module 16 upon detection of an emergency situation, which will be described later, the person carrying the emergency detection device 1 presses and holds down this push button switch 12, causing the push button switch 12 to output an input signal to the processor 10, which then stops outputting the alarm sound.

The acceleration sensor module 13 detects vibrations and shocks applied to the device body 2 as acceleration, and outputs the acceleration given to the device body 2 as a detection signal. The acceleration sensor module 13 detects acceleration for each axis in a coordinate system having three axes (X-axis, Y-axis, and Z-axis) that are preferably mutually orthogonal, and outputs a detection signal for each axis.

The GPS module 14 receives signals from GPS satellites and outputs location information of the device body 2 based on the signals. The GPS module 14 outputs the location information at predetermined time intervals, and the processor 10 temporarily stores at least the most recent location information in the memory 11.

The communication module 15 communicates with the external server 3 via a WAN (Wide Area Network), such as a mobile communication network, based on instructions from the processor 10.

The speaker module 16 outputs an alarm sound based on instructions from the processor 10.

The battery 17 supplies the power necessary for the operation of the emergency detection device 1, including the processor 10. The battery 17 is exposed to the outside of the device body 2 and is charged via a connector (e.g., a micro USB terminal) 18, not shown in FIG.

By executing the programs stored in the memory 11, the processor 10 functions as a vibration detection unit 20, a first threshold judgment unit 21, a second threshold judgment unit 22, an interval time measurement unit 23, an input waveform judgment time measurement unit 24, a counter 25, a position information acquisition unit 26, an emergency detection unit 27, an alarm unit 28 and a communication unit 29.

The vibration detection unit 20 detects vibrations applied to the device body 2 and outputs a detection signal corresponding to the vibrations. Specifically, the vibration detection unit 20 calculates a composite vector of the acceleration detection signals for each axis output from the acceleration sensor module 13, and the magnitude of this composite vector is used as a detection signal representing the vibrations applied to the device body 2.

The first threshold determination unit 21 determines that the magnitude of the detection signal from the vibration detection unit 20 has exceeded the first threshold. When the first threshold determination unit 21 determines that the magnitude of the detection signal has exceeded the first threshold, the interval time measurement unit 23 measures the time interval of the determination of the first threshold determination unit 21.

The counter 25 increments the count if the time interval measured by the interval time measurement unit 23 is equal to or less than the second threshold, and resets the count if the time interval exceeds the second threshold.

The emergency detection unit 27 detects an emergency when the count number of the counter 25 exceeds a predetermined number.

When the emergency detection unit 27 detects an emergency, the notification unit 28 notifies the user that an emergency has occurred by outputting an alarm sound from the speaker module 16.

The location information acquisition unit 26 acquires location information of the location of the device main body 2 based on information received from a GPS satellite. Specifically, the location information acquisition unit 26 acquires location information output from the GPS module 14, and regards this as the location information of the location of the device main body 2.

The communication unit 29 transmits to the external server 3 the location information (including the location information temporarily stored in the memory 11) at the time when the emergency detection unit 27 detects an emergency and information indicating that the emergency detection unit 27 has detected an emergency.

The second threshold judgment unit 22 judges that after the first threshold judgment unit 21 judges that the magnitude of the detection signal output by the vibration detection unit 20 exceeds the first threshold, the magnitude of the detection signal output by the vibration detection unit 20 subsequently falls below the third threshold.

The input waveform judgment time measurement unit 24 measures the time interval from when the first threshold judgment unit 21 judges that the magnitude of the detection signal output by the vibration detection unit 20 exceeds the first threshold to when the second threshold judgment unit 22 judges that the magnitude of the detection signal output by the vibration detection unit 20 falls below the third threshold.

Then, the emergency detection unit 27 does not detect an emergency if the time interval measured by the input waveform judgment time measurement unit 24 exceeds the fourth threshold value.

In addition, the emergency detection unit 27 does not detect an emergency if the time interval measured by the interval time measurement unit 23 is equal to or less than a fifth threshold value which is smaller than the second threshold value.

Next, referring to Figures 3 and 4, the operation of the emergency detection device 1 of this embodiment will be explained.

Figure 3 is a diagram showing an example of the detection principle of the emergency detection device 1 of the first embodiment.

As shown in the upper part of Fig. 3, the vibration detection unit 20 detects vibrations applied to the device main body 2 and outputs a detection signal as a resultant vector value of acceleration (magnitude of the resultant vector). The first threshold determination unit 21 determines if the magnitude of this detection signal exceeds a detection start threshold (first threshold). Next, the second threshold determination unit 22 determines if the magnitude of the detection signal exceeds a detection end threshold (third threshold) after the determination by the first threshold determination unit 21.

As shown in the upper part of Figure 3, when the vibration detection unit 20 detects multiple vibrations at a certain time interval, the first threshold judgment unit 21 and the second threshold judgment unit 22 each make a threshold judgment, and the interval time measurement unit 23 measures the time interval (detection interval time) between the judgments made by the first threshold judgment unit 21.

3, the counter 25 starts counting when a determination is made by the second threshold determination unit 22, and increments the count number if the detection interval time measured by the interval time measurement unit 23 is equal to or less than the second threshold, and resets the count number if the detection interval time exceeds the second threshold. In the example shown in FIG. 3, the counter 25 increments the count number up to three.

Then, when the count number of the counter 25 exceeds a predetermined number of times (three times in the example shown in Figure 3), the emergency detection unit 27 detects that an emergency has occurred (the detection flag is ON in the lower part of Figure 3), causes the alarm unit 28 to output an alarm sound, and sends, via the communication unit 29, the location information at the time the emergency was detected and information indicating that an emergency has occurred to the external server 3.

Figure 4 is a diagram showing another example of the detection principle of the emergency detection device 1 of the first embodiment.

The detection principle of the emergency detection device 1 shown in Fig. 4 is substantially the same as that shown in Fig. 3. In Fig. 4, the input waveform judgment time measurement unit 24 measures the time interval (input waveform judgment time) from when the first threshold judgment unit 21 judges that the magnitude of the detection signal exceeds the detection start threshold to when the second threshold judgment unit 22 judges that the magnitude of the detection signal falls below the detection end threshold.

Then, the emergency detection unit 27 does not detect an emergency if the input waveform judgment time measured by the input waveform judgment time measurement unit 24 exceeds the fourth threshold. In the example shown in FIG. 4, if the input waveform judgment time exceeds the fourth threshold, the counter 25 does not increment the count number. As a result, a detection signal waveform in which the input waveform judgment time exceeds the fourth threshold does not serve as the basis for emergency detection by the emergency detection unit 27.

Figure 5 is a flowchart for explaining the operation of the emergency detection device 1 of the first embodiment.

First, the vibration detection unit 20 of the emergency detection device 1 calculates a detection signal indicating the magnitude of the vibration applied to the device body 2 as a resultant vector value of acceleration based on the signal from the acceleration sensor module 13 (S100). Next, the first threshold determination unit 21 determines whether the detection signal calculated in S100 is greater than the detection start threshold (S101), and if it is determined that it is greater (YES in S101), proceeds to S102, and if it is determined that it is equal to or less than the detection start threshold (NO in S101), returns to S100.

In S102, the input waveform judgment time measurement unit 24 measures the input waveform judgment time. The measurement by the input waveform judgment time measurement unit 24 continues until the second threshold judgment unit 22 judges that the detection signal is smaller than the detection end threshold (YES in S103). In parallel, the interval time measurement unit 23 measures the detection interval time, which is the time interval of the judgment of the first threshold judgment unit 21.

The emergency detection unit 27 determines whether the input waveform judgment time measured by the input waveform judgment time measurement unit 24 is greater than a fourth threshold value (S104), and if it is determined that it is greater (YES in S104), proceeds to S112, and if it is determined that it is equal to or less than the fourth threshold value (NO in S104), proceeds to S105.

In S105, the counter 25 determines whether the detection interval time measured by the interval time measurement unit 23 is greater than the second threshold value. If it is determined that the detection interval time is greater than the second threshold value (YES in S105), the counter 25 clears the count in S106 and proceeds to S107. If it is determined that the detection interval time is equal to or less than the second threshold value (NO in S105), the interval time measurement unit 23 resets the detection interval time (S107).

Next, the counter 25 increments the count number by one (S108), and the interval time measurement unit 23 starts measuring the detection interval time (S109).

Then, the emergency detection unit 27 judges whether the count number counted by the counter 25 has reached a predetermined number of times (three times in the example shown in Figures 3 and 4) or more (S110). If it is judged that the count number has reached the predetermined number of times (YES in S110), it detects that an emergency has occurred in S111, causes the alarm unit 28 to output an alarm sound, and causes the communication unit 29 to send location information, etc. to the external server 3. On the other hand, if it is judged that the count number does not reach the predetermined number of times (NO in S110), it returns to S100.

On the other hand, in S112, the emergency detection unit 27 determines that the detection is a false positive, the counter 25 clears the count (S113), and the interval time measurement unit 23 resets the detection interval time (S114). After this, the program returns to S100.

As described above in detail, according to the emergency detection device 1 of this embodiment, the emergency detection device 1 is placed in a bag or the like, and when the owner of the emergency detection device 1 determines that an emergency has occurred, the owner can vibrate the emergency detection device 1, for example by tapping it from outside the bag, and the emergency detection device 1 will detect the emergency based on the vibration, emit an alarm sound, and send information that an emergency has occurred to the external server 3. This makes it possible to detect an emergency without the need for complicated operations such as pressing a button.

In addition, the emergency detection device 1 of this embodiment detects an emergency when the count number of the counter 25 reaches a predetermined number or more. In the case of the emergency detection device 1 of this embodiment, which detects an emergency by detecting vibrations applied to the device main body 2, vibrations act on the device main body 2, for example, when the bag in which the emergency detection device 1 is placed suddenly hits an obstacle, or when the holder goes up and down stairs. If an emergency is detected based on such vibrations, this would be a false detection. In the emergency detection device 1 of this embodiment, an emergency is detected when the count number of the counter 25 reaches a predetermined number or more, so false detections can be eliminated as much as possible and an emergency can be detected reliably.

Furthermore, the emergency detection device 1 of this embodiment does not increase the count of the vibration detection-based counter 25 if it determines that the input waveform judgment time measured by the input waveform judgment time measurement unit 24 is greater than the fourth threshold value. This makes it possible to exclude long-period vibrations other than those caused by the holder intentionally tapping, etc., from the scope of emergency detection, and furthermore, to eliminate false detections as much as possible and perform reliable emergency detection.

In the emergency detection device 1 of this embodiment, the detection end threshold is set to be smaller than the detection start threshold. Since the detection start threshold determines the start of vibration detection, it is preferable to set it to a certain level and start detection based on the user of the emergency detection device 1 intentionally tapping, etc. On the other hand, the detection end threshold determines the end of the input waveform judgment time, and from the viewpoint of reliably detecting the falling edge of the detection signal, it is preferable that it be smaller than the detection start threshold.

Note that the above-mentioned embodiments are detailed descriptions of the configurations in order to clearly explain the present invention, and are not necessarily limited to those having all of the configurations described. In addition, it is possible to add, delete, or replace part of the configuration of each embodiment with another configuration.

In the above-described embodiment, the actual values of the threshold value and the count number of the counter 25, which is the premise for detecting an emergency, can be set arbitrarily, and there are no particular limitations. In addition, it is also possible to make the threshold value, etc. changeable by the user of the emergency detection device 1. As an example, a rotary or dip switch may be provided on the device main body 2, and the threshold value, etc. may be changed by this switch.

Furthermore, when the detection interval time measured by the interval time measurement unit 23 is equal to or less than a fifth threshold value that is smaller than the second threshold value, it is also possible not to increment the count number of the counter 25. For example, when a short-period vibration is applied to the emergency detection device 1, for example, when a car carrying the user of the emergency detection device 1 goes over a step, it is possible to prevent the vibration from being erroneously detected.

In addition, the above-mentioned configurations, functions, processing units, processing means, etc. may be realized in part or in whole by hardware, for example by designing them as integrated circuits. The present invention can also be realized by software program code that realizes the functions of the embodiments. In this case, a storage medium on which the program code is recorded is provided to a computer, and a processor of the computer reads the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the functions of the above-mentioned embodiments, and the program code itself and the storage medium on which it is stored constitute the present invention. Examples of storage media for supplying such program code include flexible disks, CD-ROMs, DVD-ROMs, hard disks, SSDs (Solid State Drives), optical disks, magneto-optical disks, CD-Rs, magnetic tapes, non-volatile memory cards, and ROMs.

In addition, the program code that realizes the functions described in this embodiment can be implemented in a wide range of program or script languages, such as, for example, assembler, C/C++, perl, Shell, PHP, Java (registered trademark), Python, etc.

Furthermore, the program code of the software that realizes the functions of the embodiments may be distributed over a network and stored in a storage means such as a computer's hard disk or memory, or in a storage medium such as a CD-RW or CD-R, and the processor of the computer may read and execute the program code stored in the storage means or storage medium.

In the above examples, the control lines and information lines are those considered necessary for the explanation, and not all control lines and information lines in the product are necessarily shown. All components may be interconnected.

Next, an emergency detection system 30 including an emergency detection device 31 according to the second embodiment will be described. The emergency detection device 31 according to the second embodiment differs from the emergency detection device 1 according to the first embodiment only in the configurations of the processor 32, wide area wireless communication module 33, audio processing module 34, microphone module 35, LED display 36, satellite positioning module 37 and local wireless communication module 38, and the other configurations are the same as those of the emergency detection device 1 according to the first embodiment. Therefore, the differences from the first embodiment will be mainly described.

Figure 6 is a block diagram showing the functional configuration of an emergency detection device in the second embodiment.

The emergency detection system 30 has an emergency detection device 31, an external server (emergency control server) 3, and a user terminal 4.

The emergency detection device 31 has a processor 32, a memory 11, a push button switch 12, an acceleration sensor module 13, a speaker module 16, a battery 17, a wide-area wireless communication module 33, a voice processing module 34, a microphone module 35 as an example of a "recording unit", an LED display 36, a satellite positioning module 37 and a local wireless communication module 38.

The processor 32 executes the programs stored in the memory 11 to function as a vibration detection unit 20, a first threshold judgment unit 21, a second threshold judgment unit 22, an interval time measurement unit 23, an input waveform judgment time measurement unit 24, a counter 25, a position information acquisition unit 26, an emergency detection unit 27, an alarm unit 28, a communication unit 29, a remaining charge notification unit 39 and a charge depletion prevention unit 40.

When the remaining charge of the battery 17 is below a predetermined level (e.g., 20% or less), the remaining charge notification unit 39 sends a remaining charge warning signal to the external server 3 a predetermined number of times (e.g., once a day or a predetermined small number of times to reduce power consumption).

The charge depletion prevention unit 40 displays a screen on the user terminal 4 to prompt the user to charge the battery 17. The screen prompting the user to charge is a screen on which the user can draw an electronic fortune on the user terminal 4 while charging the battery 17. Note that the screen prompting the user to charge may also be another function, such as a game or fortune telling.

The wide-area wireless communication module 33 performs wide-area mobile wireless communication with the external server 3 via a mobile communication network such as LTE (registered trademark) (Long Term Evolution).

The audio processing module 34 communicates with the speaker module 16 and the microphone module 35 based on instructions from the processor 10.

The microphone module 35 records surrounding sounds based on instructions from the processor 10. The recorded data recorded by the microphone module 35 is stored in the memory 11. The maximum recording time is set according to the capacity of the memory 11. The maximum recording time may be, for example, 300 seconds.

The LED indicator 36 emits light while the battery 17 is being charged. The LED indicator 36 may emit light while the emergency detection unit 27 detects an emergency.

The satellite positioning module 37 receives signals from the Global Navigation Satellite System (GNSS) and outputs location information of the device body 52 (FIGS. 7 and 8) based on the signals. The satellite positioning module 37 outputs the location information at predetermined time intervals, and the processor 10 temporarily stores at least the most recent location information in the memory 11.

The local wireless communication module 38 performs short-range wireless communication with the user terminal 4 via Bluetooth (registered trademark).

The user terminal 4 is a smartphone, such as a mobile terminal, and stores an emergency assistance application and an emergency assistance program.

Figure 7 shows the external appearance of the emergency detection device according to the second embodiment, where (a) is a left side view, (b) is a front view, (c) is a right side view, (d) is a plan view, (e) is a rear view, and (f) is a bottom view. Figure 8 shows the external appearance and interior of the emergency detection device according to the second embodiment, where (g) is a front perspective view, (h) is an exploded view, and (i) is a front perspective view with the lid removed.

The emergency detection device 31 has a resin device body 52. The device body 52 is formed in a box shape with both corners on one side chamfered when viewed from the front as shown in Figures 7(b) and (d).

As shown in Figures 7(a) to 7(d) and 7(f) and Figures 8(g) and 8(h), a removable lid 53 is provided on the back of the device body 52. As shown in Figure 7(e), a number of through holes 55 are formed in the upper part of the outer surface of the lid 53 to transmit the alarm sound of the speaker module 16 to the outside.

7B, a knot mark 54 is provided on the upper front surface of the device body 52. The mark 54 may be formed on the device body 52 by laser marking.

On the right side of the device body 52, the push button switch 12 is arranged so as to be exposed to the outside, as shown in Fig. 7(c). On the bottom surface of the device body 52, the connector 18 is arranged so as to be exposed to the outside, as shown in Fig. 7(f).

8(h)(i), a storage space 55 capable of storing one or more internal symbols 58 is formed within the device body 38. Both ends of an elastic rubber band 56 are fixed to the inner surface of the device body 38 that constitutes the storage space 55. A circular fastener 57 is provided in the center of the band 56. The band 56, the fastener 57, and the inner surface of the device and the main body 38 support the internal symbol 58 therebetween. In addition to the internal symbol 58, the storage space 55 may also store paper on which the user's goals and wishes are written, photographs, coins and/or bills, etc.

Figure 9 is a diagram showing the setting screen of a user terminal in the second embodiment.

A program capable of operating the emergency detection device 31 is installed in the user terminal 4. A setting screen 60 is displayed on the user terminal 4, which allows the operating conditions of the emergency detection device 31 to be set according to the user's preferences and/or circumstances. The setting screen 60 displays an SOS mode 61, an SOS activation setting 62, an SOS notification to the watcher 63, a sensitivity setting 64, and a setting button 65. The watcher is an emergency contact to which an emergency occurrence notification including information on the location information of the emergency detection device 31, the SOS status, and the SOS permission setting is sent when an emergency is detected by the emergency detection unit 27.

The SOS mode 61 is configured so that the user can select whether to transition to either the "recording mode" or the "buzzer mode" when an emergency is detected by the emergency detection unit 27. The recording mode is a mode in which the microphone module 35 records surrounding sounds based on instructions from the processor 10. The buzzer mode is a mode in which the speaker module 16 outputs an alarm sound based on instructions from the processor 10. The alarm sound may be selected in advance by the user from among multiple types. The SOS mode 61 may include a combined mode in which both the recording mode and the buzzer mode can be executed. In the combined mode, a process may be executed to cancel the alarm sound when recording in order to prevent the alarm sound from being recorded.

The SOS activation setting 62 is configured so that the user can select between "Vibration/Button (Normal Mode)" which detects an emergency by both vibration detection and button operation (e.g., pressing and holding the push button switch 12 for 3 seconds), and "Button (SW Only Mode)" which detects an emergency by button operation only without vibration detection. The SOS activation setting 62 is initially set to the normal mode.

The SOS notification 63 is configured so that the user can select "YES" or "NO" for sending an emergency occurrence notification from the external server 3 to the emergency contact when an emergency is detected by the emergency detection unit 27. The external server 3 can register multiple emergency contacts for each ID (i.e., user) of the emergency detection device 31. The SOS notification 63 may apply the same setting to all emergency contacts registered in the external server 3. Alternatively, the SOS notification 63 may apply different settings (whether to send an emergency occurrence notification, or whether to send one of different types or contents of emergency occurrence notifications) to each emergency contact. In this way, by setting the SOS notification 63 to off and vibrating the emergency detection device 31, the detection sensitivity of the emergency detection device 31 can be checked without sending an emergency occurrence notification to the emergency contact.

The sensitivity setting 64 allows the user to select from three levels of vibration (acceleration) detection sensitivity (detection threshold): "low," "medium," and "high." Below the sensitivity setting 64, a warning message is displayed stating, "Operation may vary depending on the type of bag, so please adjust the sensitivity each time you change your bag."

The number of detections as the "predetermined number of times", the detection start threshold, the detection end threshold, the detection interval time, the input waveform judgment time, and the number of moving averages of the acceleration for judgment are each set in advance.

The number of detections is set to 3 to 10 times, and is preferably set to 4 times. Based on experimental results, the number of detections is set to 3 or more times because a detection of 2 times increases the likelihood of occurrence in daily life.

The detection start threshold is set to 1.25 to 2.50 g, and is preferably set to 1.75 g. The detection start threshold is set based on the normal distribution of experimental results. The acceleration while riding in a car is about 0.5 g.

The detection end threshold is set to 0.75 to 1.00 g, and is preferably set to 1.00 g. The detection end threshold is set based on the detection start threshold described above.

The detection interval is set to 250-400 ms, and preferably to 250 ms. The detection interval is set based on experimental results. The intentional tapping speed is 100-200 ms or less.

The input waveform judgment time is set to 50 to 75 ms, and is preferably set to 50 ms. Based on experimental results, the input waveform judgment time is set to a value that does not cause false detection when a user runs with the emergency detection device 31 in a bag. Furthermore, if the next detection signal is not detected within a specified time even if the set value of the input waveform judgment time is exceeded, the emergency detection device 31 may clear the number of detections.

The number of moving averages of the acceleration for judgment is set to 1 to 10 times, and is preferably set to 5 times. The number of moving averages of the acceleration for judgment is set to a value that will not cause a false detection when the emergency detection device 31 is dropped on a hard floor, etc.

The setting button 65 is pressed when completing changes to the settings of the SOS mode 61, SOS activation setting 62, SOS notification to the monitor 63 and/or sensitivity setting 64.

Figure 10 is a state transition diagram of the operating mode in the second embodiment.

The emergency detection device 31 can transition to any of the following modes: standby mode M1, buzzer mode M2 or recording mode M3.

In standby mode M1, the functions of emergency situation determination D11, remaining charge notification D12, recorded data playback D13 and fortune-telling control D14 can be executed continuously.

Emergency situation determination D11 is a function that determines whether an emergency situation is detected by both vibration detection and button operation when the SOS activation setting 62 is set to normal mode, or whether an emergency situation is detected by button operation only without vibration detection when the SOS activation setting 62 is set to SW Only mode.

The remaining charge notification D12 and the fortune-telling control D14 are functions of the remaining charge notification unit 39 and the battery run-out prevention unit 40.

Recorded data playback D13 is a function for playing back recorded data stored in memory 11. Note that the recorded data stored in memory 11 may be received and played back by the user terminal 4.

In the buzzer mode M2, the functions of continuous alarm generation D21, intermittent transmission of ID D22, intermittent transmission of location information D23, intermittent transmission of SOS status D24, and intermittent transmission of SOS permission setting D25 can be continuously executed. Furthermore, in the buzzer mode M2, the functions of stopping the alarm Ex21 and transmitting the SOS status cancellation Ex22 are executed before transitioning to the standby mode M1.

Continuous warning sound generation D21 is a function that continuously generates a warning sound from the speaker module 16.

Intermittent ID transmission D22 is a function that sends the ID of the emergency detection device 31 to the external server 3 intermittently (for example, every minute).

Intermittent transmission of location information D23 is a function that transmits the location information of the emergency detection device 31 intermittently (for example, every minute) to the external server 3 when an emergency is detected by the emergency detection unit 27.

Intermittent transmission of SOS status D24 is a function that sends the SOS status to the external server 3 intermittently (for example, every minute).

Intermittent transmission of SOS permission setting D25 is a function that sends the SOS permission setting to the external server 3 intermittently (for example, every minute).

Alarm Stop Ex21 is a function that stops the alarm generated by the speaker module 16.

Sending SOS status cancellation Ex22 is a function that sends the cancellation of the SOS status to the external server 3.

In recording mode M3, the function of outputting a recording confirmation sound En1 is executed after transition from standby mode M1. Furthermore, in recording mode M3, the functions of continuous recording D31, intermittent transmission of ID D32, intermittent transmission of location information D33, intermittent transmission of SOS status D34, and intermittent setting of SOS permission setting D35 can be executed continuously. Furthermore, in recording mode M3, the functions of stopping recording EX31, preventing overwriting of recording EX32, transmission of SOS status release EX33, and transmission of recording completion EX34 are executed before transition to standby mode M1.

Recording confirmation sound output En1 is a function that outputs a confirmation sound from the speaker module 16 for a short period of time to inform the user that recording has started successfully.

Continuous recording D31 is a function that continuously records audio around the microphone module 35.

Intermittent transmission of ID D32, intermittent transmission of location information D33, intermittent transmission of SOS status D34, and intermittent setting of SOS permission setting D35 have the same functions as intermittent transmission of ID D22, intermittent transmission of location information D23, intermittent transmission of SOS status D24, and intermittent setting of SOS permission setting D25, respectively.

Recording Stop EX31 is a function that stops recording using the microphone module 35.

Recording overwrite prohibition EX32 is a function that prohibits new recording data from being overwritten onto memory 11 when recording data is stored in memory 11. This prevents the loss of recording data.

Sending SOS status cancellation EX33 has the same function as sending SOS status cancellation EX22.

Recording completion transmission EX34 is a function that transmits to the external server 3 that recording by the microphone module 35 has been completed.

When the power is turned on, the emergency detection device 31 transitions to standby mode M1.

If an emergency is detected by the emergency detection unit 27 in standby mode M1, the emergency detection device 31 transitions from standby mode M1 to either buzzer mode M2 or recording mode M3, depending on the operating conditions set in the SOS activation setting 62.

In both the buzzer mode M2 and the recording mode M3, if the user performs a special manual operation (e.g., pressing and holding the push button switch 12 for 3 seconds) or the power is turned off, the emergency detection device 31 transitions from both modes M2 and M3 to the standby mode M1.

In recording mode M3, if a specified recording limit time has elapsed since the start of recording, the emergency detection device 31 transitions from recording mode M2 to standby mode M1.

While not communicating with the external server 3 in standby mode M1, or in buzzer mode M2 and recording mode M3, the emergency detection device 31 may turn off the power to the wide area wireless communication module 33 and the satellite positioning module 37 to reduce power consumption.

In standby mode M1, when SOS mode 61 is set to recording mode and recording data is stored in memory 11, if an emergency is detected by the emergency detection unit 27, the emergency detection device 31 may transition to buzzer mode M2.

Figure 11 is a flowchart showing emergency situation determination control in the second embodiment.

The emergency detection unit 27 judges the SOS activation setting 62 (S301). When the SOS activation setting 62 is vibration/button (normal mode), the emergency detection unit 27 judges whether or not an emergency caused by the push button switch 12 has been detected (S302). When the judgment result of S302 is false (S302: NO), the emergency detection unit 27 judges whether or not an emergency caused by vibration has been detected (FIG. 5) (S303). When the judgment result of S303 is true (S303: NO), the emergency detection unit 27 waits until it detects an emergency caused by vibration. When the judgment result of S303 is true (S303: NO), the emergency detection unit 27 judges that an emergency has occurred (S304) and ends the emergency judgment control.

On the other hand, if the SOS activation setting 62 is in button (SW Only) mode or the judgment result of S302 is true (S302: YES), the emergency detection unit 27 judges whether the push button switch 12 has been pressed and held (S305). If the judgment result of S305 is false (S305: NO), the emergency detection unit 27 waits until the push button switch 12 is pressed and held. If the judgment result of S305 is true (S305: YES), the emergency detection unit 27 judges that an emergency has occurred (S304) and ends the emergency judgment control.

Figure 12 is a flowchart showing remaining charge notification control in the second embodiment.

The charge remaining amount notification unit 39 checks the charge remaining amount of the battery 17 (S401). The charge remaining amount notification unit 39 judges whether the charge remaining amount of the battery 17 is equal to or less than a predetermined amount (for example, 20% or less) (S402). If the judgment result of S402 is false (S402: NO), the charge remaining amount notification unit 39 turns off the notification flag (S403) and returns to S401. If the judgment result of S402 is true (S402: YES), the charge remaining amount notification unit 39 judges the notification flag when a charge remaining amount warning signal is sent to the external server 3 (S404). The notification flag is cleared, for example, once a day. If the judgment result of S404 is true (S404: YES), the charge remaining amount notification unit 39 ends the charge remaining amount notification control. If the result of the determination in S404 is false (S404: NO), the remaining charge notification unit 39 sends a remaining charge warning signal to the external server 3 (S405) and turns off the notification flag (S406). The remaining charge notification unit 39 may also send the remaining charge warning signal to the user terminal 4.

The external server 3 receives the remaining charge warning signal (S407). The external server 3 sends the remaining charge warning signal to the user terminal 4 and the emergency contact (S408).

Figure 13 is a flowchart showing the fortune-telling function in the second embodiment.

While the user terminal 4 is communicatively connected to the emergency detection device 31, it sends a charging request to the emergency detection device 31 (S501).

The charge depletion prevention unit 40 receives a charging request from the user terminal 4 (S502). The charge depletion prevention unit 40 checks whether charging is in progress (S503). The charge depletion prevention unit 40 determines whether charging is in progress (S504). If the determination result of S504 is true (S504: YES), the charge depletion prevention unit 40 returns a divine lottery permission signal to the user terminal 4 (S505). If the determination result of S504 is false (S504: NO), the charge depletion prevention unit 40 returns a divine lottery prohibition signal to the user terminal 4 (S506).

The user terminal 4 receives a reply to the charging request from the charge depletion prevention unit 40 (S507). The user terminal 4 judges whether or not a divine lottery permission signal has been received from the charge depletion prevention unit 40 (S508). If the judgment result of S508 is false (S508: NO), the user terminal 4 returns to S501. If the judgment result of S508 is true (S508: YES), the user terminal 4 displays that a divine lottery can be issued, issues a divine lottery in response to user operation, and displays the issued divine lottery. This motivates the user to charge frequently, and the frequency with which the battery 17 runs out of charge can be reduced as much as possible.

Figure 14 is a block diagram showing the functional configuration of an external server in the second embodiment.

The external server 3 communicates with the user terminal 4, the emergency detection device 31, an emergency contact terminal 61 as an example of an "emergency contact", and the data analysis system 62 via the communication network 60.

The external server 3 has storage 70, a CPU 71, a memory 72 and a communication module 73.

Storage 70 may be any device that has the function of storing data in a storage device. Storage 70 has a database 74 that stores various data.

The database 74 stores the ID 75, user attribute information 76, emergency contact information 77, SOS log 78 and analysis results (list of danger spots) 79.

ID75 is an ID pre-assigned to each emergency detection device 31 (i.e., user).

User attribute information 76 is various information indicating the attributes of the user. User attribute information 76 is, for example, the user's name, the telephone number of the user terminal 4 owned by the user, an email address, etc.

Emergency contact information 77 includes the name of the emergency contact, the telephone number of the emergency contact terminal 61, an email address, etc., pre-registered for each emergency detection device 31.

The SOS log 78 is historical information of the date, time, location, action, and result of each emergency notification. The SOS log 78 may also include other danger information received from outside.

The analysis result 79 is the result of the analysis system 62 analyzing the SOS log 78.

Various control programs 80 are stored in the storage 70. The control programs 80 include SOS reporting 81, data management 82, remote operation 83, and safety support 84.

SOS notification 81 is a program for sending an emergency occurrence notification to the emergency contact terminal 61 when the emergency contact terminal 61 is set to SOS permission. Data management 82 is a program for managing various information in the database 74. Remote operation 83 is a program for operating the emergency detection device 31 from the emergency contact terminal 61. Safety support 84 is a program for having the analysis system 62 analyze the SOS log 78 and calculate danger spots for the user.

The CPU 71 is, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an FPGA (Field-Programmable Gate Array), an ASIC (Application Specific Integrated Circuit), etc. The memory 72 includes, for example, a semiconductor storage medium such as a RAM (Random Access Memory), a ROM (Read Only Memory), or an SSD (Solid State Drive).

The communication module 73 communicates with the communication network 60 via various communication means such as mobile communication and Internet communication.

The emergency contact terminal 61 is a terminal of an emergency contact pre-registered for each ID 75 in the emergency contact information 77. The emergency contact terminal 61 is, for example, the user's guardian.

The data analysis system 62 analyzes dangerous spots based on the SOS log 78 and stores the analysis results 79 in the database 74.

Figure 15 is a diagram for explaining SOS notification control in the second embodiment.

The external server 3 judges whether or not an SOS state has been received from the emergency detection device 31 of each user (S601). If the judgment result of S601 is true (S601: YES), the external server 3 judges whether or not the emergency contact terminal 61 is set to allow SOS (S602). If the judgment result of S602 is true (S602: YES), the external server 3 notifies the emergency contact of the user periodically (for example, every minute) (S603), stores the SOS log 78 in the database 74 (S604), and returns to S601. If the judgment result of S602 is false (S602: NO), the external server 3 does not notify the emergency contact of the user of the emergency, stores the SOS log 78 in the database 74 (S604), and returns to S601.

The external server 3 judges whether or not an SOS state cancellation has been received from each user's emergency detection device 31 (S605). If the judgment result of S601 is true (S605: YES), the external server 3 judges whether or not the emergency contact terminal 61 is set to allow SOS (S606). If the judgment result of S606 is true (S606: YES), the external server 3 notifies the emergency contact of the user that the emergency state has been cancelled (S607), stores the SOS log 78 in the database 74 (S604), and returns to S601.

If the determination result of S605 is false (S605: NO), the external server 3 returns to S601. If the determination result of S606 is false (S606: NO), the external server 3 stores the SOS log 78 in the database 74 without notifying the user's emergency contact that the emergency situation has been lifted (S604).

Figure 16 is a flowchart showing data analysis control in the second embodiment.

The data analysis system 62 receives the SOS log 78 and the analysis result 79 (danger spot list) from the external server 3 (S701). The data analysis system 62 identifies danger spots based on the SOS log 78 (S702). The data analysis system 62 updates the danger spot list based on the danger spots identified in S702 (S703). The data analysis system 62 transmits the danger spot list to the external server 3 (S704).

Figure 17 is a flowchart showing remote operation control in the second embodiment, and Figure 18 is a diagram for explaining remote operation control in the second embodiment.

The external server 3 determines whether or not a remote operation request has been received from each user's emergency contact terminal 61 (S801). If the determination result of S801 is false (S801: NO), the external server 3 waits until a remote operation request is received from each user's emergency contact terminal 61.

If the determination result of S801 is true (S801: YES), the external server 3 instructs the emergency detection device 31 of the user to execute a predetermined operation (e.g., issue an alarm or report a location) or transmits a predetermined message (e.g., a warning message or report a location) to the user terminal 4 (S802). The external server 3 notifies the requested emergency contact terminal 61 of the result of the remote operation (S803). The external server 3 stores the SOS log 78 in the database 74 (S804).

Figure 19 is a flowchart showing safety support control in the second embodiment, and Figure 20 is a diagram showing an example of the display of danger spots in the second embodiment.

The user terminal 4 periodically notifies the external server 3 of its current location information (S901).

The external server 3 receives current location information of each user terminal 4 (S902).

The external server 3 searches the danger spot list for danger spots within a specified distance range from the current location information of each user terminal 4 (S903).

The external server 3 determines whether or not there is a danger spot within a predetermined distance range from the current location information of each user terminal 4 (S904). If the determination result of S904 is false (S904: NO), the external server 3 returns to S901. If the determination result of S904 is true (S904: YES), the external server 3 sends a danger alert to the user terminal 4 (S905).

The user terminal 4 notifies the user of the danger alert (S906). The user may be notified of the danger alert by generating an alert sound, by displaying a map 90 and displaying the current position and the position of the danger spot D on the displayed map 90, or by displaying an alert message.

As described in detail above, according to the emergency detection device 31 of this embodiment, if the next detection signal is not detected within a specified time even if the set value of the input waveform judgment time is exceeded, the number of detections is cleared, thereby eliminating false detections due to accumulated vibrations as much as possible and enabling reliable emergency detection.

In addition, the emergency detection device 31 of this embodiment has a detection start threshold of 1.25 to 2.50 g, a detection interval time of 250 to 400 ms, and a detection count of 3 to 10 times. This makes it possible to reliably detect an emergency by minimizing false detections caused by vibrations that occur in daily life.

Furthermore, the device body 52 of the emergency detection device 31 of this embodiment is formed in a box shape with both corners on one side chamfered when viewed from the front, and a storage space 55 capable of storing the internal symbol 58 is formed within the device body 52. This allows the user to intuitively feel that the emergency detection device 31 is a talisman, giving the user a psychological sense of security that "I am being protected," and also preventing the user from forgetting to carry the emergency detection device 31 with them.

Furthermore, the emergency detection system 30 of the present invention has an emergency detection device 31, and an external server 3 in which an emergency contact terminal 61 is registered for each emergency detection device 31. When an emergency is detected by the emergency detection unit 27, the external server 3 sends information indicating that an emergency has been detected by the emergency detection unit 27 to the emergency contact terminal 61. This allows the owner of the emergency contact terminal 61 to recognize that an emergency has occurred for the user, and to respond quickly.

Furthermore, the emergency detection system 30 of the present invention includes an emergency detection device 31, an external server 3 in which an emergency contact terminal 61 is registered for each emergency detection device 31, and a user terminal 4 in which a program capable of communicating with the emergency detection device 31 is stored. The emergency detection device 31 includes a battery 17 that supplies power to the emergency detection device 31, a remaining charge notification unit 39 that sends a remaining charge warning signal to the external server 3 and the user terminal 4 when the remaining charge of the battery 17 is below a predetermined remaining charge, and a charge depletion prevention unit 40 that displays a screen on the user terminal 4 to alert the user to charge the battery 17, and the external server 3 sends the remaining charge warning signal to the user terminal 4 and the emergency contact terminal 61.

Furthermore, the emergency detection system 30 of the present invention has an emergency detection device 31, an external server 3 that stores location information of the device main body 52 when an emergency is detected by the emergency detection unit 27, and a user terminal 4 that notifies the external server 3 of current location information. If the location information is within a predetermined distance range from the current location information, the external server 3 sends a danger alert to the user terminal 4. This allows the user to know where emergencies have occurred in the past and appropriately avoid danger to themselves.

The present invention is not limited to the above-described embodiments and includes various modifications.

For example, the emergency detection device 31 of the second embodiment may have a camera capable of recording video instead of recording audio using the microphone module 35.

Furthermore, the emergency detection device 31 of the second embodiment may, instead of recording audio or video, send an audio or video recording request to the user terminal 4 to cause the user terminal 4 to record audio or video.

1... Emergency situation detection device 2... Device body 3... External server 4... User terminal 10... Processor 11... Memory 12... Push button switch 13... Acceleration sensor module 14... GPS module 15... Communication module 16... Speaker module 17... Battery 20... Vibration detection section 21... First threshold judgment section 22... Second threshold judgment section 23... Interval time measurement section 24... Input waveform judgment time measurement section 25... Counter 26... Position information acquisition section 27... Emergency situation detection section 28... Notification section 29... Communication section 30... Emergency situation detection system 31... Emergency situation detection device 35... Microphone module 39... Remaining charge notification section 40... Charge depletion prevention section 52... Device body 55... Storage space 58... Internal code 61... Emergency contact terminal 62... Data analysis system

Claims (12)

A detection device main body,
a vibration detection unit that detects vibrations applied to the detection device body and outputs a detection signal corresponding to the vibrations;
a first threshold determination unit that determines whether the magnitude of the detection signal from the vibration detection unit exceeds a first threshold;
an interval time measurement unit that measures a first time interval from when the magnitude of the detection signal exceeds the first threshold value to when the first threshold value determination unit determines that the magnitude of the detection signal exceeds the first threshold value again ;
a second threshold determination unit that determines, after the first threshold determination unit determines that the magnitude of the detection signal exceeds the first threshold, that the magnitude of the detection signal falls below a third threshold that is smaller than the first threshold;
an input waveform judgment time measurement unit that measures a second time interval from when the magnitude of the detection signal determined by the first threshold judgment unit exceeds the first threshold to when the magnitude of the detection signal determined by the second threshold judgment unit falls below the third threshold;
and an emergency detection unit that detects an emergency when the number of times that the first time interval is equal to or less than a second threshold and the second time interval is equal to or less than a fourth threshold exceeds a predetermined number. A detection device main body,
a vibration detection unit that detects vibrations applied to the detection device body and outputs a detection signal corresponding to the vibrations;
a first threshold determination unit that determines whether the magnitude of the detection signal from the vibration detection unit exceeds a first threshold;
an interval time measurement unit that measures a time interval between when the first threshold determination unit determines that the magnitude of the detection signal has exceeded the first threshold and when the magnitude of the detection signal has exceeded the first threshold ;
and an emergency detection unit that detects an emergency when the number of times the time interval measured by the interval time measurement unit is equal to or less than a second threshold and exceeds a fifth threshold that is smaller than the second threshold exceeds a predetermined number. The emergency detection device according to claim 1, characterized in that the predetermined number of times, the first threshold, the second threshold, and the third threshold are configured so that they can be arbitrarily changed by the user. The emergency detection device according to claim 2, characterized in that the predetermined number of times, the first threshold, and the second threshold are configured so that they can be arbitrarily changed by the user. a recording unit that records surrounding sounds when the emergency situation is detected by the emergency situation detection device;
An alarm unit that outputs an alarm sound;
having
3. The emergency detection device according to claim 1, wherein when an emergency is detected by the emergency detection unit, a user can select whether to transition to a recording mode in which the recording unit records surrounding sounds, a buzzer mode in which the alarm unit outputs an alarm sound, or a combined mode in which both the recording mode and the buzzer mode can be executed. the detection device body has a push button switch that detects an emergency situation when pressed and held by a user;
3. The emergency detection device according to claim 1, wherein a user can select between a normal mode in which an emergency is detected by the vibration detection unit and the push button switch, and a button mode in which an emergency is detected by the push button switch. an emergency detection device that detects an emergency based on vibrations applied to a detection device body;
an external server in which an emergency contact is registered for each of the emergency detection devices;
A user terminal having a program stored therein that can communicate with the emergency detection device,
The emergency detection device includes: a battery that supplies power to the emergency detection device;
a remaining charge notification unit that transmits a remaining charge warning signal to the external server and the user terminal when the remaining charge of the battery is equal to or less than a predetermined remaining charge;
a battery depletion prevention unit that displays a screen on the user terminal to prompt a user to charge the battery,
The emergency detection system according to claim 1, wherein the external server transmits the remaining charge warning signal to the user terminal and the emergency contact. an emergency detection device that detects an emergency based on vibrations applied to a detection device body;
an external server that stores location information of the detection device body when an emergency is detected by the emergency detection device;
a user terminal that notifies the external server of current location information;
having
The emergency detection system is characterized in that the external server sends a danger alert to the user terminal if the location information is within a predetermined distance range from the current location information. an emergency detection device that detects an emergency based on vibrations applied to a detection device body;
an external server that communicates with the emergency detection device;
having
The emergency detection device includes:
a recording unit that records surrounding sounds when the emergency situation is detected by the emergency situation detection device;
A memory for storing the recording data recorded by the recording unit,
An emergency detection system, comprising: a signal that recording by said recording unit has been completed, said signal being transmitted to said external server. an emergency detection device that detects an emergency based on vibrations applied to a detection device body;
A user terminal having a program stored therein that can communicate with the emergency detection device,
When the emergency detection device is being charged, the emergency detection device transmits a divine lottery issuance permission signal to the user terminal;
The emergency detection system is characterized in that, when the user terminal receives the divine lot issuance permission signal, it displays the issued divine lot on a screen. 1. A method for detecting an emergency situation, comprising:
Detects vibrations applied to the detector body and outputs a detection signal corresponding to the vibrations;
determining that the magnitude of the detection signal exceeds a first threshold;
measuring a first time interval from when the magnitude of the detection signal exceeds the first threshold to when it is determined that the magnitude of the detection signal next exceeds the first threshold ;
After determining that the magnitude of the detection signal exceeds the first threshold, determining that the magnitude of the detection signal falls below a third threshold that is smaller than the first threshold;
measuring a second time interval from when the magnitude of the detection signal exceeds the first threshold to when the magnitude of the detection signal falls below a third threshold that is smaller than the first threshold;
an emergency state is detected when the number of times that the measured first time interval is equal to or less than a second threshold value and the measured second time interval is equal to or less than a fourth threshold value exceeds a predetermined number of times. 1. A method for detecting an emergency situation, comprising:
Detects vibrations applied to the detector body and outputs a detection signal corresponding to the vibrations;
determining that the magnitude of the detection signal exceeds a first threshold;
measuring a time interval from when the magnitude of the detection signal exceeds the first threshold to when it is determined that the magnitude of the detection signal next exceeds the first threshold ;
A method for detecting an emergency, comprising the steps of: detecting an emergency when the number of times the measured time interval is equal to or less than a second threshold and exceeds a fifth threshold smaller than the second threshold exceeds a predetermined number of times.

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