CN111787609A - Personnel positioning system and method based on human body voiceprint characteristics and microphone base station - Google Patents
Personnel positioning system and method based on human body voiceprint characteristics and microphone base station Download PDFInfo
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- CN111787609A CN111787609A CN202010654665.XA CN202010654665A CN111787609A CN 111787609 A CN111787609 A CN 111787609A CN 202010654665 A CN202010654665 A CN 202010654665A CN 111787609 A CN111787609 A CN 111787609A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L17/00—Speaker identification or verification
- G10L17/06—Decision making techniques; Pattern matching strategies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to a personnel positioning system and a personnel positioning method based on human voiceprint characteristics and a microphone base station. The positioning system comprises acquisition equipment for acquiring the vocal print characteristics of a human body at the early stage, a microphone base station which is arranged indoors at the later stage and used for positioning, and a server used for processing data and obtaining personnel positioning results; collecting the sound characteristics of a person to be positioned through collection equipment, and storing the sound characteristics in a server; the microphone base stations simultaneously acquire sound information on the basis of clock synchronization, and after extraction and matching, position calculation is performed according to the time difference of sound reaching the respective base stations, so that the current position of the person to be positioned is determined. The invention can accurately position the personnel to be positioned in a large positioning range, improve the positioning precision and reduce the energy consumption of the system.
Description
Technical Field
The invention relates to the field of voiceprint feature detection, the field of sound information acquisition and the field of space positioning, in particular to a personnel positioning system and a personnel positioning method based on human voiceprint features and a microphone base station.
Background
With the continuous progress of scientific technology, various positioning systems aiming at personnel indoors have been widely used. However, most of the current personnel positioning equipment need to wear a special sensor label. A system carrying a passive tag is mostly identified by using a Radio Frequency Identification (RFID) technology, and the passive RFID has the characteristics of short positioning distance and small range due to small power; the system with the active tag, like bluetooth tag, UWB tag, has the problem that the energy consumption is high, need to charge, brings inconvenience for use and popularization.
Disclosure of Invention
The invention aims to provide a personnel positioning system and a personnel positioning method based on human voiceprint characteristics and a microphone base station, and aims to solve the problems of short positioning distance, small range and high energy consumption of the conventional personnel positioning system.
In order to achieve the purpose, the invention provides the following scheme:
a person location system based on human voiceprint features and a microphone base station, comprising: the system comprises acquisition equipment, a plurality of microphone base stations and a server;
the acquisition equipment is used for acquiring first sound characteristics of a plurality of persons to be positioned under the condition that clocks of a plurality of microphone base stations are synchronous, extracting first voiceprint characteristics in the first sound characteristics, and storing the first voiceprint characteristics and information of the persons to be positioned corresponding to the first voiceprint characteristics to the server to form a voiceprint characteristic database;
the microphone base station is used for acquiring second sound characteristics of a person to be positioned in the area of the microphone base station, extracting second sound pattern characteristics according to the second sound characteristics and determining the arrival time of sound waves reaching each microphone base station;
the server is used for matching the second voiceprint characteristics with the voiceprint characteristic database and determining information of a person to be positioned; and the system is also used for determining the sound wave arrival time difference by utilizing the multiple arrival times based on the information of the person to be positioned, and calculating the current position of the person to be positioned according to the sound wave arrival time difference.
Optionally, the microphone base station specifically includes: the system comprises a control module, a sound acquisition module, a power supply module and a network communication module;
the sound collection module, the power supply module and the network communication module are respectively connected with the control module; the sound collection module is used for collecting the second sound characteristic and converting the second sound characteristic into an electric signal; the control module is used for controlling the operation of the microphone base station and marking the arrival time of the second sound characteristic; the power supply module is used for supplying power to the personnel positioning system; the network communication module is used for returning data and synchronizing clocks of the microphone base stations.
Optionally, the communication mode of the network communication module is a wireless communication mode or a wired communication mode;
and if the communication mode is the wired communication mode, the network communication module serves as a power supply module to supply power to the personnel positioning system.
Optionally, the number of the microphone base stations is 3 or 4.
Optionally, the server is configured to calculate the current position of the person to be positioned by using a two-dimensional calculation method or a three-dimensional calculation method based on a TDOA algorithm.
Optionally, if the number of the microphone base stations is 3:
using formulas
Establishing a TDOA equation set, and resolving the current position of the person to be positioned; wherein (Xa, Ya) is a coordinate of a microphone base station a, (Xb, Yb) is a coordinate of a microphone base station B, (Xc, Yc) is a coordinate of a microphone base station C, Tba is a time difference between arrival of the second sound feature at the microphone base station B and the microphone base station a, Tca is a time difference between arrival of the second sound feature at the microphone base station C and the microphone base station a, V is a sound propagation speed, and (x, y) is a current position of a person to be positioned.
Optionally, if the number of the microphone base stations is 4:
using formulas
Establishing a TDOA equation set, and resolving the current position of the person to be positioned; where (Xa, Ya) is the coordinate of microphone base station a, (Xb, Yb) is the coordinate of microphone base station B, (Xc, Yc) is the coordinate of microphone base station C, (Xd, Yd) is the coordinate of microphone base station D, Tba is the time difference between the arrival of the second sound feature at the microphone base station B and the microphone base station a, Tca is the time difference between the arrival of the second sound feature at the microphone base station C and the microphone base station a, Tda is the time difference between the arrival of the second sound feature at the microphone base station D and the microphone base station a, V is the speed of sound propagation, and (x, y) is the current position of the person to be located.
A personnel positioning method based on human body voiceprint characteristics and a microphone base station comprises the following steps:
under the condition that clocks of a plurality of microphone base stations are synchronous, collecting first sound features of a plurality of persons to be positioned, extracting first voiceprint features in the first sound features, and storing the first voiceprint features and information of the persons to be positioned corresponding to the first voiceprint features to the server to form a voiceprint feature database;
collecting second sound characteristics of a person to be positioned in the area of the microphone base stations, extracting second sound pattern characteristics according to the second sound characteristics and determining the arrival time of sound waves reaching each microphone base station;
matching the second voiceprint characteristics with the voiceprint characteristic database to determine information of a person to be positioned;
and determining the sound wave arrival time difference by utilizing the multiple arrival times based on the information of the person to be positioned, and calculating the current position of the person to be positioned according to the sound wave arrival time difference.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides a personnel positioning system and a method based on human voiceprint characteristics and a microphone base station, wherein the human voiceprint characteristics of a person to be positioned in the area of the microphone base station are matched with a voiceprint characteristic database to determine information of the person to be positioned, based on the information of the person to be positioned, a plurality of arrival times are used for determining the arrival time difference of sound waves, and the current position of the person to be positioned is calculated according to the arrival time difference of the sound waves; the invention uses the arrival time difference of sound waves for positioning, and has the characteristics of high positioning precision, low cost and easy operation, and a person to be positioned does not need to carry a sensor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a diagram of a personnel location system based on human voiceprint features and a microphone base station in accordance with the present invention;
fig. 2 is a schematic structural diagram of a microphone base station according to the present invention;
FIG. 3 is a general flow chart of the work flow provided by the present invention;
FIG. 4 is a flow chart of a positioning operation provided by the present invention;
fig. 5 is a flowchart of a person positioning method based on human voiceprint features and a microphone base station according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a personnel positioning system and a personnel positioning method based on human voiceprint characteristics and a microphone base station, which can accurately position personnel to be positioned in a large positioning range, improve positioning accuracy and reduce system energy consumption.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a structural diagram of a personnel positioning system based on a human voiceprint feature and a microphone base station, and as shown in fig. 1, a personnel positioning system based on a human voiceprint feature and a microphone base station includes: the system comprises acquisition equipment 1, a plurality of microphone base stations 2 and a server 3; the acquisition equipment 1 is used for acquiring first sound features of a plurality of persons to be positioned under the condition that clocks of a plurality of microphone base stations 2 are synchronous, extracting first voiceprint features in the first sound features, and storing the first voiceprint features and information of the persons to be positioned corresponding to the first voiceprint features to the server 3 to form a voiceprint feature database; the microphone base station 2 is used for acquiring a second sound characteristic of a person to be positioned in the area of the microphone base station 2, extracting a second sound pattern characteristic according to the second sound characteristic and determining the arrival time of sound waves reaching each microphone base station 2; the server 3 is used for matching the second voiceprint characteristics with the voiceprint characteristic database and determining information of a person to be positioned; and the system is also used for determining the sound wave arrival time difference by utilizing the multiple arrival times based on the information of the person to be positioned, and calculating the current position of the person to be positioned according to the sound wave arrival time difference.
The server 3 is used for processing the voice print information of the personnel in the early stage and acquiring the characteristics and storing the characteristics into a database; and matching the person according to the voiceprint information of the human body during later positioning, and calculating the position according to the data of the microphone base station 2.
The performance of the sound collection equipment 1 is superior to that of the microphone base station 2, but a plurality of persons to be positioned can input sound information on the same equipment. According to the invention, 3-4 microphone base station 2 devices are installed in an area to be positioned according to positioning requirements; the microphone base station 2, in the same area, should keep clock synchronization and collect voice information together. The sound information will be used to extract voiceprint features and calculate the time of arrival.
The microphone base station 2 specifically includes: the system comprises a control module, a sound acquisition module, a power supply module and a network communication module; the sound collection module, the power supply module and the network communication module are respectively connected with the control module; the sound collection module is used for collecting the second sound characteristic and converting the second sound characteristic into an electric signal; the control module is used for controlling the operation of the microphone base station 2 and marking the arrival time of the second sound characteristic; the power supply module is used for supplying power to the personnel positioning system; the network communication module is used for returning data and synchronizing clocks of the plurality of microphone base stations 2.
The communication mode of the network communication module is a wireless communication mode or a wired communication mode; and if the communication mode is the wired communication mode, the network communication module serves as a power supply module to supply power to the personnel positioning system. The network communication module can be an Ethernet wired communication module or a wireless communication module.
Referring to fig. 1, the personnel positioning system based on the human voiceprint characteristics and the microphone base station comprises a collection device 1 for collecting the human voiceprint characteristics in the early stage, a microphone base station 2 installed indoors in the later stage for positioning, and a server 3 for processing, storing data and obtaining personnel positioning results.
The acquisition equipment 1 is used for acquiring voice information of personnel at the early stage, the performance is superior to that of the microphone base station 2, but a plurality of personnel to be positioned can input the voice information on the same equipment, and finally all acquired data are transmitted to the server 3; the microphone base stations 2 are arranged in areas to be positioned, and 3-4 microphone base stations are arranged in each area according to positioning requirements; the server 3 is used for processing the voice print information of the personnel in the early stage and acquiring the characteristics and storing the characteristics into a database; and matching the person according to the voiceprint information of the human body during later positioning, and calculating the position according to the data of the microphone base station 2.
Fig. 2 is a schematic structural diagram of a microphone base station provided by the present invention, and referring to fig. 2, the microphone base station 2 of the present invention is composed of a sound collection module 21, a control module 22, a power supply module 23, and a network communication module 24; the sound acquisition module 21 is used for acquiring sound information and has the capability of converting sound signals into electric signals; the control module 22 is used for controlling the operation of the microphone base station 2 and marking the arrival time of the collected sound information; the power module 23 is used for supplying power, and can select wired power supply, battery power supply and the like according to requirements; the network communication module 24 is used for returning data, and can select devices such as wireless sensor bluetooth, WiFi, wired ethernet and the like; the network communication module 24 is also used for clock synchronization of the plurality of microphone base stations 2; if the network communication selects a wired communication mode, the power module 23 and the network communication module 24 may be combined with each other to use POE for power supply.
The working process of the invention is as follows:
FIG. 3 is a general flow chart of the work flow provided by the present invention, referring to FIG. 3, including initializing voiceprint feature extraction and localization; the initial voiceprint feature extraction step is to use the acquisition equipment 1 to acquire the sound information of the person to be positioned and transmit the sound information to the server 3 to extract a first voiceprint feature.
The positioning step is to calculate the position of the person to be positioned according to the first voiceprint characteristic and the returned data of the microphone base station 2.
Fig. 4 is a positioning work flow chart provided by the present invention, and fig. 4 includes clock synchronization, sound collection, sound feature extraction, and position calculation.
The clock synchronization is base station equipment in the same area, and the clock synchronization is carried out through a network communication module. That is, A, B, C3 existing base stations, base station a broadcasts the clock ta of current a to base station B, C through the network communication module, and after base station B, C receives the information of the clock a, the antenna delay and the transmission delay of the device can be added on the basis of ta to serve as the current time of itself, thereby realizing synchronization of the base stations.
The antenna delay is the inherent delay of a signal through the whole hardware equipment, including a circuit, a chip and the like, and can be obtained by testing in advance.
The transmission delay is negligible because the transmission speed of the electromagnetic wave is far greater than the sound velocity.
Secondly, the sound collection is to collect the surrounding sound information and mark the arrival time of the sound on the basis of clock synchronization.
And thirdly, extracting the current second sound characteristic by the sound characteristic extraction, and matching the current second sound characteristic with the data in the database to obtain the person to be positioned corresponding to the current sound.
And fourthly, the position determination is to establish a TDOA equation set according to the time difference of the sound reaching 3 different base stations and calculate the position.
Xa, Ya, Xb, Yb, Xc, Yc are coordinates of the base station ABC, Tba is time difference of sound reaching the base station B, A, Tca is time difference of sound reaching the base station C, A, V is propagation speed of sound, and x and y are final resolving results, namely positions of people.
The solution of 3-dimensional position can also be performed using 4 base stations, which will add Z-axis information to the above equation set.
Fig. 5 is a flowchart of a person positioning method based on a human voiceprint feature and a microphone base station, and as shown in fig. 5, a person positioning method based on a human voiceprint feature and a microphone base station includes:
step 501: under the condition that clocks of a plurality of microphone base stations 2 are synchronous, collecting first sound features of a plurality of persons to be positioned, extracting first voiceprint features in the first sound features, and storing the first voiceprint features and information of the persons to be positioned corresponding to the first voiceprint features to the server 3 to form a voiceprint feature database;
step 502: collecting second sound characteristics of a person to be positioned in the area of the microphone base station 2, extracting second sound pattern characteristics according to the second sound characteristics and determining the arrival time of sound waves reaching each microphone base station 2;
step 503: matching the second voiceprint characteristics with the voiceprint characteristic database to determine information of a person to be positioned;
step 504: and determining the sound wave arrival time difference by utilizing the multiple arrival times based on the information of the person to be positioned, and calculating the current position of the person to be positioned according to the sound wave arrival time difference.
The invention utilizes human body voiceprint characteristics to match people and uses the arrival time difference of sound waves for positioning. The device has the advantages that a person to be positioned does not need to carry a sensor, and the device has the characteristics of high positioning precision, low cost and easiness in operation.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A personnel location system based on human voiceprint features and a microphone base station, comprising: the system comprises acquisition equipment, a plurality of microphone base stations and a server;
the acquisition equipment is used for acquiring first sound characteristics of a plurality of persons to be positioned under the condition that clocks of a plurality of microphone base stations are synchronous, extracting first voiceprint characteristics in the first sound characteristics, and storing the first voiceprint characteristics and information of the persons to be positioned corresponding to the first voiceprint characteristics to the server to form a voiceprint characteristic database;
the microphone base station is used for acquiring second sound characteristics of a person to be positioned in the area of the microphone base station, extracting second sound pattern characteristics according to the second sound characteristics and determining the arrival time of sound waves reaching each microphone base station;
the server is used for matching the second voiceprint characteristics with the voiceprint characteristic database and determining information of a person to be positioned; and the system is also used for determining the sound wave arrival time difference by utilizing the multiple arrival times based on the information of the person to be positioned, and calculating the current position of the person to be positioned according to the sound wave arrival time difference.
2. The system according to claim 1, wherein the microphone base station comprises: the system comprises a control module, a sound acquisition module, a power supply module and a network communication module;
the sound collection module, the power supply module and the network communication module are respectively connected with the control module; the sound collection module is used for collecting the second sound characteristic and converting the second sound characteristic into an electric signal; the control module is used for controlling the operation of the microphone base station and marking the arrival time of the second sound characteristic; the power supply module is used for supplying power to the personnel positioning system; the network communication module is used for returning data and synchronizing clocks of the microphone base stations.
3. The system for locating personnel based on voiceprint characteristics of a human body and a microphone base station as claimed in claim 2, wherein the communication mode of the network communication module is a wireless communication mode or a wired communication mode;
and if the communication mode is the wired communication mode, the network communication module serves as a power supply module to supply power to the personnel positioning system.
4. The system of claim 2, wherein the number of the microphone base stations is 3 or 4.
5. The system according to any one of claims 1 to 4, wherein the server is configured to solve the current position of the person to be positioned by a two-dimensional solution or a three-dimensional solution based on a TDOA algorithm.
6. The system according to claim 5, wherein if the number of the microphone base stations is 3:
using formulas
Establishing a TDOA equation set, and resolving the current position of the person to be positioned; wherein (Xa, Ya) is a coordinate of a microphone base station a, (Xb, Yb) is a coordinate of a microphone base station B, (Xc, Yc) is a coordinate of a microphone base station C, Tba is a time difference between arrival of the second sound feature at the microphone base station B and the microphone base station a, Tca is a time difference between arrival of the second sound feature at the microphone base station C and the microphone base station a, V is a sound propagation speed, and (x, y) is a current position of a person to be positioned.
7. The system according to claim 5, wherein if the number of the microphone base stations is 4:
using formulas
Establishing a TDOA equation set, and resolving the current position of the person to be positioned; where (Xa, Ya) is the coordinate of microphone base station a, (Xb, Yb) is the coordinate of microphone base station B, (Xc, Yc) is the coordinate of microphone base station C, (Xd, Yd) is the coordinate of microphone base station D, Tba is the time difference between the arrival of the second sound feature at the microphone base station B and the microphone base station a, Tca is the time difference between the arrival of the second sound feature at the microphone base station C and the microphone base station a, Tda is the time difference between the arrival of the second sound feature at the microphone base station D and the microphone base station a, V is the speed of sound propagation, and (x, y) is the current position of the person to be located.
8. A personnel positioning method based on human body voiceprint characteristics and a microphone base station is characterized by comprising the following steps:
under the condition that clocks of a plurality of microphone base stations are synchronous, collecting first sound features of a plurality of persons to be positioned, extracting first voiceprint features in the first sound features, and storing the first voiceprint features and information of the persons to be positioned corresponding to the first voiceprint features to the server to form a voiceprint feature database;
collecting second sound characteristics of a person to be positioned in the area of the microphone base stations, extracting second sound pattern characteristics according to the second sound characteristics and determining the arrival time of sound waves reaching each microphone base station;
matching the second voiceprint characteristics with the voiceprint characteristic database to determine information of a person to be positioned;
and determining the sound wave arrival time difference by utilizing the multiple arrival times based on the information of the person to be positioned, and calculating the current position of the person to be positioned according to the sound wave arrival time difference.
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Application publication date: 20201016 |