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Method for positioning system to position indoor sound source

A sound source localization and sound source technology, which is applied in the direction of localization, radio wave measurement system, measurement device, etc., can solve the problems of positioning blind area, unfavorable layout, low positioning accuracy, etc., and achieves low system power consumption and avoids the loss of positioning accuracy. Effect

Inactive Publication Date: 2015-02-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the existing problem of positioning blind areas caused by occlusion or the sound direction of the sound source target. Different requirements for positioning accuracy in different application backgrounds cannot adaptively adjust the complexity of system calculations, resulting in excessive positioning calculations. The real-time performance is not high, the positioning calculation algorithm is simple so that the positioning accuracy is not high, the physical structure of the positioning system is complex or harsh, and it is not conducive to the actual layout. An indoor sound source positioning system and a time difference and positioning system using the system are provided. method

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  • Method for positioning system to position indoor sound source
  • Method for positioning system to position indoor sound source
  • Method for positioning system to position indoor sound source

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Experimental program
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specific Embodiment approach 1

[0022] Specific implementation mode one: the following combination figure 1 Describe this embodiment, an indoor sound source localization system described in this embodiment, it includes a first sound sensor S 0 , the second sound sensor S 1 , the third sound sensor S 2 , the fourth sound sensor S 3 , the fifth sound sensor S 4 , the first signal conditioning circuit 1, the second signal conditioning circuit 2, the third signal conditioning circuit 3, the fourth signal conditioning circuit 4, the fifth signal conditioning circuit 5, the first A / D conversion module 6, the second A / D Conversion module 7, the third A / D conversion module 8, the fourth A / D conversion module 9, the fifth A / D conversion module 10, sound source detection module 11, time difference module 12, positioning module 13, parameter control module 14 and Gain control module 15;

[0023] First sound sensor S 0 The signal output terminal of the first signal conditioning circuit 1 is connected to the signal...

specific Embodiment approach 2

[0026] Specific implementation mode two: the following combination figure 2 Describe this embodiment. This embodiment further defines the indoor sound source localization system described in the first specific embodiment. In this embodiment, the second signal conditioning circuit 2, the third signal conditioning circuit 3, the first The internal circuit structures of the four signal conditioning circuit 4, the fifth signal conditioning circuit 5 and the first signal conditioning circuit 1 are identical, wherein the first signal conditioning circuit 1 is composed of a filter circuit, a PGA circuit and a signal holding circuit;

[0027] The signal input end of the filter circuit is the signal input end of the first signal conditioning circuit 1, the signal output end of the filter circuit is connected to the signal input end of the PGA circuit, and the signal output end of the PGA circuit is connected to the signal input end of the signal holding circuit , the signal output end...

specific Embodiment approach 3

[0028] Embodiment 3: This embodiment further defines the indoor sound source localization system described in Embodiment 2. In this embodiment, the PGA circuit is a programmable gain amplifier circuit.

[0029] The sound source detection module 11 determines the parameters for programming and controlling the PGA circuit by analyzing the signal level of each signal to ensure that the amplification factor of each signal is the same and the signal amplitude of the signal with the strongest signal reaches the maximum of AD conversion value, which preserves the location information of the sound source implicit in the amplitude.

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Abstract

The invention discloses a positioning system of an indoor sound source and a method using the positioning system to position the indoor sound source, and relates to the sound source positioning technology. The positioning system of the indoor sound source and the method using the positioning system to position the indoor sound source are used for solving the problems that a positioning dead zone is formed due to blocking or the direction of sound production of a sound source target, the requirements for positioning accuracy on different application backgrounds are different, complexity of system operation cannot be adjusted in a self-adaptation mode, and accuracy is low. Due to the fact that sound sensors are reasonably distributed in a three-dimensional space, correlation operation is carried out on the time sequence of signals captured by the sound sensors to obtain arrival time differences, the obtained arrival time differences are used for solving a sound source positioning model to obtain the result of three-dimensional positioning of the sound source, and dead zones of sound source positioning can be well prevented due to reasonable distribution of the sound sensors. The positioning system of the indoor sound source and the method using the positioning system to position the indoor sound source are applicable to positioning of sound source targets of a plurality of indoor places.

Description

technical field [0001] The invention relates to a system for locating an indoor sound source and a method for locating an indoor sound source by using the system. Background technique [0002] In recent years, sound source localization technology has become a new research hotspot, which has broad application prospects and practical significance. Especially for indoor sound source localization, the application demand is strong. For example, a smart home entertainment / service robot needs to locate the human voice when performing human-computer interaction. The robot can change its field of view by detecting and locating the human voice, and can accurately locate the human face by detecting and recognizing the face through the camera. The object it needs to interact with finally realizes the interaction of voice and video. [0003] For the existing sound source localization technology, there are positioning blind spots caused by occlusion or sound source target sound directio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/20
Inventor 赵雅琴吴龙文任广辉
Owner HARBIN INST OF TECH