JP2006148357A - Position detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position detection system capable of detecting the position of a person without requiring any complicated equipment such as a sensor. <P>SOLUTION: A sound is collected from a microphone installed on the surface of each floor or the like. The collected sound is transmitted to a sound analysis part 5 as sound data. When the sound analysis part 5 determines that the sound data are footstep data from the transmitted information, the sound is transmitted to a control unit 2. The control unit 2 instructs a floor control unit to generate a sound from a speaker near the position of the microphone by which a footstep is collected. The control unit 2 may instruct the floor control unit to make light near a place where the footstep is collected bright. As a result, a sound is generated from the speaker according to the position of the person who is in a building, and the brightness of the light can be changed. Further, the collected footstep is analyzed, identified, and recognized, thus generating a sound according to each person from the speaker. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a position detection system that detects movement of a person in a house and controls equipment.

In general, a system has been proposed that detects the movement of a person in a house and controls equipment in a building according to the movement of the person. For example, a system that monitors the movement of a person using a device such as a camera and controls a device such as a television based on a predetermined operation such as a gesture has been proposed (for example, Patent Document 1). In addition, a system has been proposed that issues a warning when an abnormal sound is detected by installing a microphone in a building and analyzing collected sound (for example, Patent Document 2).
JP-A-11-327753 JP-A-9-138894

  However, the control method and the program recording medium described in Patent Document 1 detect a specific action of a person and do not detect a movement of the person.

  In addition, the crime prevention and disaster prevention device described in Patent Document 2 issues an alarm when an abnormal sound is collected, and the sound generation position cannot be specified.

  An object of this invention is to provide the position detection system which can detect a person's position, without requiring complicated installations, such as a sensor, and controls the installation according to a person's position.

  The invention according to claim 1 is inputted to the plurality of microphones distributed on the floor or the lower surface of the wall of the building, the plurality of operation units distributed on the inside of the building, and the plurality of microphones. And a control unit that detects footsteps from the sound and controls the operations of the plurality of operation units in accordance with the positions of the microphones that have detected the footsteps.

  In the present invention, a microphone is installed inside a floor in a building. Microphones are installed at intervals that can track footsteps, and control equipment in the building according to the movement of the footsteps.

  According to a second aspect of the present invention, in the above-described invention, the audio reproduction device for reproducing an audio signal is further provided, the operation unit is a speaker, and the control unit is installed in the vicinity of the position of the microphone that detects the footsteps. An audio signal to be reproduced by the audio reproduction device is output from a speaker that is provided.

  In this invention, the volume of the audio signal output from the speaker in the building is changed according to the movement of the footsteps, and control is performed so that the audio signal follows the movement of the person.

  According to a third aspect of the present invention, in the above invention, the operation unit is illumination, and the control unit controls lighting of a lighting installed near the position of the microphone that detects the footsteps, or increases brightness. Control.

  In this invention, the brightness of the lighting in the building is changed in accordance with the movement of the footsteps, and control is performed so that the light follows the movement of the person.

  According to a fourth aspect of the present invention, in the above invention, the control unit identifies and detects a plurality of types of footsteps, and controls the operation unit in different modes according to the types of the detected footsteps. It is characterized by that.

  In the present invention, multiple types of footsteps are selected and detected from the collected sound. The equipment in the building is controlled in a different manner according to each footstep.

  According to a fifth aspect of the present invention, in the above invention, the audio reproduction device reproduces a plurality of audio signals, the control unit identifies and detects a plurality of types of footsteps, and a microphone that detects each footstep. An audio signal corresponding to the detected footstep type is output from a speaker installed in the vicinity of the position.

  In the present invention, a plurality of types of footsteps are selected and detected from the collected sound, and the sound corresponding to each footstep is generated from a speaker near the position of each microphone.

  According to a sixth aspect of the present invention, in the above invention, the control unit compares the waveform collected by the microphone with a waveform pattern storage unit that stores a plurality of footstep waveform patterns, and the waveform pattern. Analyzing means for determining any one of the plurality of waveform patterns.

  In this invention, a control part registers a specific footstep pattern in a memory | storage means. When footsteps are collected, the registered footstep pattern is compared with the frequency spectrum and waveform pattern. Based on this, it recognizes whether it is a specific footstep.

  According to a seventh aspect of the present invention, in the above invention, the microphone is a flat capacitor microphone having a flat diaphragm.

  In the present invention, the microphone installed on the floor or the lower part of the wall surface is a flat flat condenser microphone.

  As described above, according to the present invention, footsteps are collected by a plurality of microphones arranged on the floor surface or the lower wall surface, and equipment in the building is controlled according to the movement of the footsteps. Depending on the position, sound can be produced from the speaker or the brightness of the illumination can be changed.

Hereinafter, a position detection system according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory diagram in a building where the position detection system of this embodiment is installed. This position detection system has a plurality of microphones, speakers, and lights arranged in a hallway or room of a building as shown in FIG. This position detection system collects footstep sounds of a resident (user) with a plurality of microphones arranged on the floor surface in a corridor or a room, identifies the position of the user based on the position of the microphone from which the footsteps were detected, and The sound is produced from the speaker, the light is turned on / off, and the brightness is changed. In addition, the light here means general electric lighting, corresponds to the lighting of the present invention, and includes a footlight, a halogen lamp, and the like.

  In the figure, each of floors F1 to Fn is a space of a section such as a corridor, a room, and a staircase. Each floor, for example, floor F1, is provided with n microphones M11 to M1n, n speakers S11 to S1n, and n lights L11 to L1n arranged at appropriate intervals.

  Here, n microphones M11 to M1n are installed on the floor. In addition, you may install in the lower part of a wall surface etc. instead of a floor surface. By installing it on the floor surface or the lower part of the wall surface, it is possible to mainly collect footsteps of the user moving in the building. The microphone may be a capacitor microphone, a dynamic microphone, or the like, or a piezoelectric sensor that detects floor vibration. The n speakers S11 to S1n are installed on the ceiling. In addition, the n lights L11 to L1n are installed in the lower part of the wall surface. As the speaker, a flat capacitor speaker, a cone type dynamic speaker or the like is used. The light is a light with quick response, such as an inverter-controlled fluorescent lamp. The speaker and the microphone may be installed in any place such as a wall without being limited to these installation places.

  FIG. 2 is a block diagram showing electrical connection of the position detection system of the present embodiment. As shown in the figure, the position detection system includes floor control units C1 to Cn connected to each of the floors F1 to Fn, a central control unit 1, a LAN 7 as a network in the building, and an audio playback device 4. Yes. The central control unit 1 includes a control unit 2 that centrally controls the position detection system, a database 3 that stores various data, a voice analysis unit 5 that analyzes voice collected by a microphone, and a user operation that is instructed by a user. Part 6 is provided.

  As described above, each floor is provided with n microphones, n speakers, and n lights. These n microphones, n speakers, and n lights are respectively Connected to the floor control unit of the floor. For example, the microphones M11 to M1n are connected to the floor control unit C1.

  The floor control unit of each floor is connected to the control unit 2 and the voice analysis unit 5 of the central control unit 1 via the LAN 7. Further, the control unit 2 and the voice analysis unit 5 are connected, and data can be transmitted and received. The audio playback device 4 is connected to the control unit 2 and outputs digital audio data. A database 3 and a user operation unit 6 are further connected to the control unit 2, and data can be transmitted to and received from the database 3, and user operation instructions can be received from the user operation unit 6.

  The floor control unit has an A / D conversion function for converting the sound collected by the microphone from an analog signal to digital data, a network adapter function for transmitting and receiving data by connecting to the LAN 7, and an output via the LAN 7. It has a D / A conversion function for converting digital data into an audio signal and a function for controlling the volume of each connected speaker and the brightness of the light.

  The sound collected by each microphone is converted into digital sound data by the A / D converter of the floor control unit and transmitted to the sound analysis unit 5 via the LAN 7. On the other hand, the audio data input from the control unit 2 to the floor control unit via the LAN 7 is converted into an audio signal by the D / A converter, and the audio is produced from the speaker. The floor control unit can individually control at which volume the sound is produced by each connected speaker. The floor control unit can individually control the brightness of each connected light.

  Here, the audio reproduction device 4 is a reproduction device that reproduces digital audio content, and outputs the digital audio data to the control unit 2 as it is. The audio content may be stored in a built-in storage such as a hard disk or may be played back by a media playback function such as a CD or MD.

  The voice analysis unit 5 performs spectrum analysis, noise removal, and the like on the input voice data, and transmits only the footstep voice data to the control unit 2. Whether or not it is a footstep is determined by comparing with footstep data stored in the database 3. The database 3 stores a plurality of types of footstep data that differ depending on the floor material. In addition, it may be determined as a footstep when the sound is collected at a uniform time interval without performing spectrum analysis, or it is determined as a footstep when the collected sound continuously moves from place to place. May be. In addition, when registering a footstep pattern, it may be registered who the footstep is. In this case, it is possible to specify and control a person who emits footsteps when a plurality of people walk or pass each other or meet and turn back.

  Based on the footstep data transmitted from the voice analysis unit 5, the control unit 2 recognizes the position of the microphone to which the footstep is input. Thereafter, the floor control unit is instructed to change the sound volume generated from each speaker around the position of the microphone to which the footsteps are input and the brightness of each light. Further, the footstep data input from the voice analysis unit 5 is registered as a specific footstep pattern and stored in the database 3. In this case, the voice analysis unit 5 performs a process of comparing the footstep data input thereafter with the footstep pattern stored in the database 3, and determines whether the footstep pattern is a specific footstep pattern. The comparison method uses, for example, a hidden Markov model.

  In the above description, the connection via the LAN 7 is used. However, the present invention is not limited to this. For example, each floor control unit and the central control unit 1 are provided with a wireless communication unit to perform wireless communication. It is also possible.

  Next, the operation of the position detection system will be described. First, the operation when the footstep pattern is not specified will be described. As described above, the sound collected by the microphones on each floor is converted into digital sound data by the A / D converter of the floor control unit and transmitted to the sound analysis unit 5 via the LAN 7. The voice analysis unit 5 performs spectrum analysis and noise removal on the transmitted voice data, and transmits it to the control unit 2 only when it is footstep voice data. The controller 2 determines which microphone has collected the transmitted footstep data. Thereafter, information on the position of the collected microphone is transmitted to the floor control unit, and the floor control unit generates a sound from a speaker near the position of the microphone from which the footsteps are collected. For example, when footsteps are collected by the microphone M11, sound is generated from the speaker S11. The sound to be generated is music or the like reproduced by the audio reproducing device 4 as described above.

  Note that the speaker that produces the sound is not limited to the speaker corresponding to the position of the microphone from which the footsteps are collected, but may be produced from the surrounding speakers. In this case, the loudspeaker corresponding to the position of the microphone from which the footsteps are collected has the highest volume, and the volume is reduced as the distance from the position increases. For example, when footsteps are collected by the microphone M11, the volume of the speaker S11 may be maximized, and the speaker S12 may sound at a lower volume.

  The floor control unit also increases the brightness of the light near the microphone where the footsteps are collected. For example, when footsteps are collected by the microphone M11, the brightness of the light L11 is increased. In this case as well, not only the light corresponding to the position of the microphone from which the footsteps are collected, but the brightness of the surrounding lights may be increased. Also at this time, the brightness of the light corresponding to the position of the microphone from which the footsteps are collected is the highest, and the brightness decreases as the distance from the position increases.

  Here, when the user continues to move within the building, for example, when the user walks from the microphone M11 to the microphone M1n, first, the footsteps are not collected by the microphone M11, and then the footsteps are collected by the microphone M12. Become. At this time, the floor control unit C1 transmits information indicating that the position of the microphone from which the footsteps are collected has been changed to M12 from the control unit 2, and therefore stops the sound generation from the speaker S11 and the speaker S12 Speak the voice. Alternatively, the volume of the speaker S11 may be decreased and the volume of the speaker S12 may be increased. Similarly, the luminance of the light L11 is lowered and the luminance of the light L12 is increased.

  At this time, the volume of the footsteps collected by the microphone M12 is gradually increased while the volume of the footsteps collected by the microphone M11 is gradually reduced. Accordingly, the volume of the speaker S11 is gradually reduced accordingly. However, the volume of the speaker S12 may be gradually increased, or the luminance of the light L12 may be gradually increased while the luminance of the light L11 is gradually decreased.

  As described above, since the position of the microphone from which the footsteps are collected changes in order, the volume of the speaker and the brightness of the light are changed according to each position. The same operation as described above is performed when the user continues to move to a different floor. For example, when the movement from the floor F1 to the floor F2 is continued, footsteps are not collected by the microphone M1n, and footsteps are collected by the microphone M21. Therefore, the control unit 2 transmits the position information of the microphone from which the footsteps are collected to each of the floor control unit C1 and the floor control unit C2, and the floor control unit C1 stops the sound generation from the speaker S1n, and the floor control The unit C2 generates sound from the speaker S21. Further, the brightness of the light L1n is lowered and the brightness of the light L21 is raised.

  As described above, the control unit 2 transmits information to each floor control unit so as to control the speaker and the light based on the position of the microphone from which the footsteps collected from each floor control unit are collected. As a result, the music and lights being reproduced move so as to follow the user walking in the building.

  Next, an operation for specifying a footstep pattern will be described. When performing the operation in this case, it is necessary to register the footstep pattern to be specified in the database 3 in advance. The user can register a specific footstep pattern in the database 3 by operating the user operation unit 6. The user registers a footstep pattern in the following procedure.

  First, when a user registers a specific footstep pattern, an operation for registering the footstep pattern is performed using the microphone on each floor. When detecting that this operation has been performed from the user operation unit 6, the control unit 2 instructs the voice analysis unit 5 to analyze the voice input from the microphones on each floor. In this state, the user actually moves in the building. At this time, not only the user who operates the user operation unit 6 but also another user having a footstep pattern to be registered. For example, when the footstep pattern to be registered is “father”, the user operation unit 6 is operated to notify the control unit 2 that the “father” pattern is to be registered.

  Also in this case, as described above, when sound is collected by the microphones on each floor, it is converted into digital sound data by the floor control unit and transmitted to the sound analysis unit 5 via the LAN 7. The voice analysis unit 5 performs spectrum analysis and noise removal on the transmitted voice data, and transmits it to the control unit 2 only when it is footstep data. The control unit 2 stores the transmitted footstep data in the database 3 as a specific footstep pattern. For example, when registering a pattern of “father”, the transmitted footstep data is stored in the database 3 as a footstep pattern of “father”.

  At this time, the control unit 2 determines three patterns of “start of walking”, “steady walk”, and “end of walk” from the amount of transmitted sound data per unit time for the transmitted sound data. That is, when the number of footsteps generated per unit time (for example, 10 seconds) gradually increases as time passes, it is determined that “start to walk”. If the number of footsteps generated per unit time does not change, it is determined as “steady walking”. When the number of footsteps generated per predetermined time gradually decreases with time, it is determined that “the end of walking”. The change in the number of footsteps generated per unit time is also registered in the database 3 as a specific pattern. Further, since the sound volume and sound quality of footsteps vary greatly depending on the floor surface material in the building, all the footstep sound data of each floor surface is also stored in the database 3.

  In addition, you may divide and register a specific footstep pattern according to the time slot | zone in one day. For example, a footstep data pattern registered in the morning is registered as a morning footstep pattern. That is, since the number of footsteps generated per unit time varies depending on the time zone of the day, the morning, noon, and night time zones are registered in the database 3 separately. This makes it possible to register a specific footstep pattern with higher accuracy.

  Further, when registering, whether the user is bare feet, wearing socks, wearing slippers, or the like can also be registered in the database 3 as a specific pattern. In this case, for example, the user operation unit 6 performs an operation for registering a footstep pattern of bare feet, and actually walks in the building with bare feet. The control unit 2 stores the footstep data transmitted as described above in the database 3 as a bare footstep pattern.

  In addition, you may make it register the movement sound of a wheelchair, etc. as a specific pattern. In this case, the user performs an operation for registering the movement sound pattern of the wheelchair and actually moves in the building with the wheelchair. At this time, voice data of a general wheelchair movement sound is stored in the database 3 in advance, and the voice analysis unit 5 determines that it is a wheelchair movement sound compared with the voice data of the database 3. The control unit 2 registers the transmitted wheelchair movement sound in the database 3 as a specific wheelchair movement sound.

  As described above, when registration of a specific footstep pattern is completed, an operation for specifying a footstep pattern when collecting footsteps can be performed.

  As described above, when the footstep pattern is specified, when voice is collected by the microphones on each floor, the voice is collected by the A / D converter of the floor control unit, and analyzed via the LAN 7. Is transmitted to the unit 5. The voice analysis unit 5 performs spectrum analysis and noise removal on the transmitted voice data, and determines whether it is footstep data. At this time, after determining the footstep data, the voice analysis unit 5 compares the footstep data with the footstep pattern stored in the database 3. As a comparison method, a stochastic model such as a hidden Markov model may be used as described above. When it is determined as a specific footstep pattern, the footstep data is transmitted to the control unit 2. For example, when it is determined that the transmitted footstep data matches the footstep pattern of “Father” among the registered patterns stored in the database 3, it is determined that the collected footstep data is the footstep data of “Father”. To the control unit 2. At this time, when it is determined that the transmitted footstep data does not correspond to any of the footstep patterns stored in the database 3, the speech analysis unit 5 does not perform the process of transmitting to the control unit 2.

  The control unit 2 determines which microphone has collected the specific footstep data transmitted. Thereafter, information on the position of the microphone from which the specific footsteps are collected is transmitted to the floor control unit, and the floor control unit generates a sound from a speaker near the position of the microphone from which the footsteps are collected. For example, when a specific footstep is collected by the microphone M11, a sound is generated from the speaker S11. At this time, the light near the position of the microphone where the specific footsteps are collected is brightened at the same time.

  The sound to be generated is music or the like reproduced by the audio reproducing device 4 as described above. In this case, music corresponding to the recognized specific footstep is generated. For example, “Father” plays music data preferred by the audio playback device 4, and music data played by “Father” is designated by the user operation unit 6. After that, when the “father” walks in the building and recognizes the footstep pattern of the “father”, the control unit 2 causes the music reproduced by the “father” to be pronounced from the speaker near the recognized microphone position. . That is, following the movement of the “father”, the music that the “father” likes is pronounced.

  As described above, if footstep patterns of a plurality of users such as “mother” and “daughter” in addition to “father” are registered in the database 3 in advance, the favorite music designated by each user is transferred to each user. It will be pronounced following. That is, the music data that the “mother” prefers is played on the audio playback device 4, and the music data that the “mother” plays on the user operation unit 6 is specified. Thereafter, when the “mother” walks in the building and recognizes the footstep pattern of the “mother”, the control unit 2 causes the music reproduced by the “mother” to be pronounced from the speakers near the recognized microphone position. . Thus, in the operation | movement when identifying and recognizing a footstep pattern, even if the footstep pattern which is not registered is recognized, operation | movement control of the installation in a building is not performed.

  Moreover, you may vary the brightness | luminance control of a light for every user. For example, in the case of a person with low eyesight, the light near the position of the microphone where the footstep pattern of the person is recognized is brightened. Moreover, you may vary the brightness | luminance control of a light according to the age of each user. For example, the light near the position of the microphone where the footstep pattern of the elderly user is recognized is brightened.

  As described above, the position detection system according to the present embodiment collects sound from microphones installed on the floor surface of each floor, and determines that the sound is footsteps when it is determined that the footstep sound is collected. By operating so that the sound is generated from the speaker near the position, the sound is generated from the speaker so as to follow the user moving in the building. Further, since the footsteps can be identified by analyzing the collected footsteps, a sound corresponding to each person can be generated from the speaker.

  In the present embodiment, an example is shown in which music is pronounced following movement and the light is brightened, but the present invention is not limited to this. For example, it is possible to record how many people walked each day by counting the number of walks, and by connecting to a display device such as a TV, the number of walks can be checked visually It is. In addition, when a footstep pattern that is not registered in the database is recognized, an alarm sound is emitted from each speaker, which can be used for security purposes. In this case, it is possible to call a specific number by connecting to a telephone or the like. It can also be operated by connecting to a security camera.

  Note that control is not limited to the speaker and the light. For example, an air conditioning facility in a building may be controlled according to the movement of a person, and can be used for various facilities.

Explanatory drawing in the building where the position detection system of this embodiment is installed Block diagram showing the electrical connection of the position detection system

Explanation of symbols

F-floor M-microphone S-speaker L-light C-floor control unit 1-central control unit 2-control unit 3-database 4-audio reproduction device 5-voice analysis unit 6-user operation unit 7-LAN

Claims (7)

A plurality of microphones installed on the floor or under the wall of the building,
A plurality of moving parts distributed inside the building,
A control unit that detects footsteps from voices input to the plurality of microphones, and controls operations of the plurality of operation units corresponding to the positions of the microphones that detected the footsteps;
A position detection system. An audio playback device for playing back an audio signal;
The operation unit is a speaker,
The position detection system according to claim 1, wherein the control unit outputs an audio signal reproduced by the audio reproduction device from a speaker installed in the vicinity of a position of a microphone that detects the footstep. The operating unit is illumination,
The position detection system according to claim 1, wherein the control unit controls lighting of a light installed near the position of the microphone that detects the footsteps, or controls brightness to be high.   The position detection system according to claim 1, wherein the control unit identifies and detects a plurality of types of footsteps, and controls the operation unit in different modes according to the types of detected footsteps. The audio reproduction device reproduces a plurality of audio signals,
The control unit identifies and detects a plurality of types of footsteps, and outputs an audio signal corresponding to the detected type of footsteps from a speaker installed in the vicinity of the position of the microphone that detected each footstep. The position detection system described in.   The control unit includes: a waveform pattern storage unit that stores a plurality of footstep waveform patterns; and an analysis unit that determines any of the plurality of waveform patterns by comparing the sound collected by the microphone with the waveform pattern. The position detection system according to claim 4 or 5, further comprising:   The position detection system according to any one of claims 1 to 6, wherein the microphone includes a planar condenser microphone having a planar diaphragm.

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