JP6985714B2 - Movement detection system - Google Patents

Description

The present invention relates to a movement detection system that detects the movement of a person using a device, and particularly relates to a movement detection system that detects the movement of a person using sound waves and a portable device.

Conventionally, as a human movement management control system, there has been a system including an electronic chip in which an ID code is stored, which is disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-37643 (“Patent Document 1”). There is.

Patent Document 1 discloses a system in which an electronic chip is activated by a sound wave so that only an authorized person can stay in a predetermined area.

JP-A-2009-37643 (Summary, etc.)

The conventional movement detection system using sound waves is configured as described above.

However, such a system requires a special electronic chip, which makes it difficult to spread the system.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a movement detection system using sound waves by using a general-purpose mobile terminal.

The movement detection system according to the present invention is a movement detection system for a mobile terminal using a sound wave, including a sound wave output device for outputting a sound wave and a general-purpose mobile terminal. The sound wave output device outputs sound waves, and the general-purpose portable terminal has a receiving unit that receives the sound waves output by the sound wave output device, a control unit that analyzes the sound waves received by the receiving unit, and based on the analysis results of the control unit. Includes a communication unit that communicates predetermined data to the outside.

Preferably, the management device for receiving the communication data of the communication unit is further included.

More preferably, the sound wave output device outputs sound waves having a plurality of different characteristics.

The sound waves output by the sound wave output device, each having a plurality of different characteristics, correspond to a plurality of different commands.

The mobile terminal has a display unit, and the command may be displayed on the display unit.

The predetermined data may include the ID of the sound wave, the ID of the mobile terminal, the device information, or the reception time of the communication unit.

A general-purpose mobile terminal receives and analyzes an external sound wave, and the mobile terminal outputs predetermined data to the outside based on the result.

Since a general-purpose terminal can detect sound waves and manage the movement of a person, it is possible to provide a movement detection system using sound waves using a general-purpose mobile terminal.

It is a block diagram which shows the whole structure of the movement detection system using the sound wave signal which concerns on this embodiment. It is a block diagram which shows the structure of a mobile terminal and a sound wave output device. It is a block diagram explaining the specific operation of a mobile terminal and a sound wave output device. It is a figure which shows the output method of a sound wave. It is a figure explaining the structure and operation when this system is used for the competition such as a marathon. It is a schematic diagram explaining the specific method of specifying the position of a mobile terminal. It is a block diagram which shows the structure when the movement detection system is used for the entry / exit management system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a basic configuration of a movement detection system using sound waves according to an embodiment of the present invention.

With reference to FIG. 1, the movement detection system 10 using sound waves includes a general-purpose mobile terminal 20 such as a smartphone held by an individual, a sound wave output device 30 that outputs sound waves to the mobile terminal 20, and a mobile terminal 20. It includes a server 40 that operates as a communicable externally provided management device.

Since the mobile terminal 20 owned by an individual has a call function, it has a reception function such as a receiving unit for receiving sound waves and a communication function for communicating with a higher-level server 40 via the Internet.

FIG. 2 is a block diagram showing the configuration of a mobile terminal 20 (FIG. 2 (A)) and a sound wave output device 30 (FIG. 2 (B)). With reference to FIG. 2A, the mobile terminal 20 is from a CPU 21 as a control unit that controls the entire mobile terminal 20, a communication unit 22 that is controlled by the CPU 21 and communicates with an external device, and a sound wave output device 30. A microphone-like sound receiving unit 23 that receives the sound of the terminal, an input unit 24 that accepts the operation of the terminal user, a display unit 25 that displays information to the terminal user, and a time measuring unit 26 that detects the time. It includes a storage unit which is a memory 27 for storing various data.

The sound wave receiving unit 23 has a microphone and the like. The communication unit 22 has an Internet line connection function by a wireless network connection function, and transmits data to be described later to an external server 40.

With reference to FIG. 2B, the sound wave output device 30 includes a CPU 31 that controls the entire sound wave output device 30, a sound wave output unit 32 such as a speaker that outputs a sound wave signal to be output to the outside, and a memory 33. include. The sound wave output device 30 may have a plurality of sound wave output units 32 in order to generate sound wave transmission regions described later at a plurality of points.

With reference to FIGS. 1 and 2, the sound wave output device 30 installed at a predetermined place outputs a sound wave as a sound wave signal in which a specific frequency (absolute frequency) corresponding to the ID data is combined.

When the mobile terminal 20 moves within the reach of the sound wave signal, the sound wave receiving unit 23 receives the sound wave signal, the CPU 21 detects the sound wave, and acquires ID data and the like.

The mobile terminal 20 transmits the sound wave ID acquired through the sound wave receiving unit 23, the mobile terminal ID, the device information, or the information including the reception time detected by the time measuring unit to the Internet line via the communication unit 22. It is transmitted to the server 40 of the host system via a network such as. Further, the CPU 21 executes a unique process according to the content of the received ID data.

The mobile terminal 20 may be a device such as a smartphone in which the system-dedicated software shown here is installed.

Further, it is preferable to have a GPS function for detecting the position.

Next, specific operations of the mobile terminal 20 and the sound wave output device 30 will be described. FIG. 3 is a block diagram for explaining this operation.

With reference to FIGS. 2 and 3, the memory 33 of the sound wave output device 30 has a plurality of sound wave output data having predetermined IDs, and the frequency combination of each sound wave output data is defined. An example of the combination of frequencies of each ID is shown in FIG. 3 (A).

In this example, the ID is determined by a combination of signals having a plurality of frequencies. With reference to FIG. 3A, here, the signal having frequencies of 12 kHz and 14 kHz is defined as ID001, and the signal having frequencies of 12 kHz and 16 kHz is defined as ID010.

The level vs. frequency of the output signal thus determined is shown in FIG. 3 (B). An example of the waveform of the output signal shown in FIG. 3 (B) is shown in FIG. 3 (C). This output signal is output from the sound wave output unit 32.

The combination of frequencies to be output may be changed in predetermined time units, and the ID may be determined by the combination of the changes.

Next, the mobile terminal 20 will be described. The mobile terminal 20 receives the sound wave data output from the sound wave output unit 32 such as a speaker via the microphone of the sound wave receiving unit 23. An example of the received data is shown in FIG. 3 (D). The CPU 21 analyzes the frequency of the sound wave and identifies the ID.

If necessary, the sound wave ID is stored in the memory 27 together with the reception time detected by the time measuring unit 26.

Next, a method of outputting sound wave data from the sound wave output device 30 will be described with reference to FIG. The sound wave output can be a combination of continuous output and intermittent output according to the application.

FIG. 4A is a diagram when the two sound waves 1 and the sound wave 2 are output so as not to overlap each other. FIG. 4B is a diagram when only the sound wave 2 is intermittently output. FIG. 4C is a diagram when only the sound wave 1 is continuously output.

When the CPU 21 continuously detects one sound wave from the sound wave receiving unit 23, the CPU 21 treats it as data by detecting it for a certain period of time. As shown in FIGS. 4A to 4C, different processing may be performed depending on whether the sound wave being detected is intermittent or continuous.

The advantages and disadvantages of continuous output and intermittent output are as follows.

The advantage of the continuous output shown in FIG. 4C is that the sound wave detection time can be lengthened, so that noise can be easily eliminated. On the other hand, the drawback is that the probability of erroneous recognition of ID data increases at the place where the two sound waves overlap.

The advantage of intermittent output as shown in FIGS. 4A and 4B is that the recognition rate is high because there is no interference between sound waves of different ID data, and the overlap of two acoustic commands is recognized. can.

On the other hand, the disadvantage is that the detection time is shorter than the continuous output and it is vulnerable to noise, so detection failure is likely to occur.

Further, since the two sound waves are alternately detected, it is necessary to determine which is detected first and which is detected last in the passage determination.

Next, a case where time is measured in a race such as a marathon using this system will be described with reference to FIGS. 5 to 6.

FIG. 5 shows a race course 55 such as a marathon, a start point 51, a relay point 52, and a goal point 53 arranged along the route, and sound wave output units 51a, 51b, 51c, 51d arranged at each point. , 52a, 52b, 53a, 53b, and the sound wave transmission regions 56a to 56c, 57a to 57b, 58a to 58b.

Sound wave output units 51a and 51b are arranged at the center of the start point 51, whereby a fairly wide sound wave transmission region 56a can be obtained. The athlete actually leaves the starting point in the region where the sound wave is interrupted and changed to sound waves from different sound wave output units 51c and 51d. The different sound wave output units 51c and 51d for detecting the start of the start point have transmission regions 56b and 56c having regions that overlap each other and regions that do not overlap with each other, respectively.

In order to clearly distinguish between the start point 51 and the point where the athlete actually leaves the start point, for example, the start point 51 uses continuous output, and the actual start point uses intermittent output. It is preferable to change each other. In this embodiment, different sound wave output units having regions that overlap each other and regions that do not overlap each other use intermittent output, but the present invention is not limited to this, and continuous output may be used, and intermittent output and continuous output may be used. May be combined with.

Further, the relay points 52 are provided with different sound wave output units 52a and 52b, each of which has a transmission region 57a and 57b. The transmission regions 57a and 57b of the different sound wave output units 52a and 52b each have a region that overlaps with each other and a region that does not overlap with each other.

Further, the goal points 53 are provided with different sound wave output units 53a and 53b, each of which has a transmission region 58a and 58b. Again, the transmission regions 58a and 58b of the different sound wave output units 53a and 53b each have a region that overlaps with each other and a region that does not overlap with each other.

In this embodiment, each point has a pair of sound wave output units that output different sound waves, and the boundary of the start point, intermediate point, goal point, etc. is determined from the change in the strength of each sound wave. The passage is judged and the passage time is determined.

Specifically, at the relay and goal points, sound wave output units are installed before and after the points to output sound wave signals of different ID data. The sound wave ID received by the mobile terminal 20 changes due to the movement of the runner. The timing of passage is determined from the change in ID data and the change in the intensity of each sound wave.

Specifically, the strength of each sound wave output unit is fixed, and the level at which the sound wave received by the sound wave receiving unit 23 of the mobile terminal 20 is valid is predetermined, and when this level is exceeded. In addition, it may be recognized that the sound wave has entered the sound wave region, or it may be recognized that the sound wave has moved to the sound wave region when the intensities of the overlapping sound waves are reversed.

In order to judge as a 0/1 digital signal depending on the presence or absence of a signal at a specific frequency, it is generally necessary to have a level ratio (D / U ratio) of 6 dB or more between the signal and the disturbing wave of unnecessary waves at that frequency. Is.

As unnecessary waves, there are biological noise (disturbance noise) such as thermal noise of the electric circuit itself of the mobile terminal 20, ambient environment, rubbing sound of clothes, conversation, and breathing sound. Further, when two different sound wave output units to be output as signal sources are installed in parallel, the sound waves from each other's sound wave output units also become unnecessary waves that interfere with the signal determination.

It is generally known that the intensity of a sound wave from a sound source radiating in a spherical shape is inversely proportional to the square of the distance from the sound source, and two sound sources with the same sound wave intensity are installed at a distance. , The amount of sound wave attenuation from each sound source differs depending on the position of the mobile terminal that receives the sound wave. The region where the difference in the amount of attenuation is 6 dB or more is a communicable region where the mobile terminal can recognize the sound wave from the sound source as a signal.

In addition, when the sensitivity of the mobile terminal changes depending on the manufacturer and model, the signal detection range of a single signal that does not use multiple signal sources can be set to a certain range by setting a threshold value for the lowest level of sound wave intensity for detecting signals. Can be specified.

FIG. 6 is a diagram showing a specific configuration when a participant having a smartphone 20 recognizes the passage of a boundary by using this mechanism.

Here, two sound wave output units 59a and 59b, each having a different ID, are provided at the boundary, and sound wave IDs (for example, 100 and 101) are output from each of the transmission regions 60a and 60b. In this example, when the smartphone 20 moves from the position of 20a to the position of 20c via 20b, it is determined that the smartphone 20 has passed this boundary from the change of the ID data and the change of the intensity of each sound wave.

At the start point 51, sound wave signals of ID data indicating before the start, immediately before the start, and after the start are output to the person waiting for the start.

The timing of switching from the pre-start ID data (sound wave output unit 51c) to the post-start ID data (sound wave output unit 51d) is determined and set as the start line passage time.

At the relay and goal points 52 and 53, sound wave output units 57a, 57b and 58a, 58b are installed before and after the points, and sound wave signals of different ID data are output. The ID data received by the device changes due to the movement of the runner. The timing of passage is determined from the change in ID data and the change in the intensity of each sound wave.

A message corresponding to the sound wave ID may be displayed to the owner on the display unit 25 of the mobile terminal 20, or data may be stored in the memory 27 of the mobile terminal 20.

Next, a case where this system is used for an entry / exit management system will be described. FIG. 7 is a block diagram showing the configuration in this case.

With reference to FIG. 7, rooms 62 and the like are lined up along the passage 70, and each room is provided with a door 61, a sound wave output unit 63 is provided inside across the door, and a sound wave output unit is provided on the outside. 73 is provided. These sound wave output units may be embedded in the floor or ceiling, or may be provided on the wall of the room. Sound waves having different IDs are output from the inner sound wave output unit 63 and the outer sound wave output unit 73, as in the sound wave output units 59a and 59b described with reference to FIG.

For example, when a user having a mobile terminal opens the door 61 and enters the room 62 with the power of the mobile terminal turned on, the mobile terminal 20 first detects the sound wave ID 201 and then detects the sound wave ID 200. Then, these received data are transmitted to an external server (not shown).

The external server determines the passage time of the entrance / exit and whether the user has entered or exited the room from the change in the strength of the sound wave from the sound wave output unit and the change in the ID data. Alternatively, when the sound wave IDs of the outlet and the inlet are detected, it is determined that the sound wave ID has passed, but it is determined that the sound wave has passed.

Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to that of the illustrated embodiment. It is possible to make various modifications and modifications to the illustrated embodiment within the same range as the present invention or within the same range.

10 movement detection system, 20 mobile terminal, 21 CPU, 22 communication unit, 23 sound wave receiver, 24 input unit, 25 display unit, 26 timing unit, 27 memory, 30 sound wave output device, 31 CPU, 32, 59, 63, 73 Sound wave output, 33 memory, 40 server, 51 start point, 52 relay point, 53 goal point, 55 course, 56-58,60 transmission area, 61 doors, 62 rooms, 70 passages.

Claims (4)

A movement detection system for mobile terminals using sound waves, including a sound wave output device that outputs sound waves and a general-purpose mobile terminal.
The sound wave output device outputs a sound wave and
A general-purpose mobile terminal has a receiving unit that receives the sound wave output by the sound wave output device, and a receiver.
A control unit that analyzes the sound waves received by the receiving unit, and
A communication unit that communicates predetermined data to the outside based on the analysis result of the control unit is included.
Further including a management device for receiving the communication data of the communication unit,
The sound wave output device outputs sound waves, each of which has a plurality of different characteristics.
A movement detection system in which a sound wave having a plurality of characteristics different from each other has a plurality of sound wave output data having a predetermined ID, and a combination of frequencies of the respective sound wave output data is defined. The movement detection system according to claim 1 , wherein the sound waves output by the sound wave output device, each of which has a plurality of different characteristics, correspond to a plurality of different IDs. The movement detection system according to claim 2 , wherein the mobile terminal has a display unit, and the ID is displayed on the display unit. The movement detection system according to any one of claims 1 to 3 , wherein the predetermined data includes characteristics of a sound wave, an ID of the mobile terminal, device information, or a reception time of the communication unit.

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