Low altitude target monitoring method based on microphones array network

A low-altitude target and microphone technology is applied in the field of low-altitude target monitoring and passive target positioning to achieve the effect of reducing requirements, improving target positioning accuracy and coverage, and reducing the difficulty of implementation.

Active Publication Date: 2009-11-11
WISESOFT CO LTD +1
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Problems solved by technology

[0003] The purpose of the present invention is to utilize technologies such as acoustic passive positioning, multi-hop packet wireless network (Ad-Hoc) networking and multi-sensor data fusion to propose a low-altitude target monitoring method, trying to solve the problem of sparsely populated and remote airspace monitoring blind spots. It can overcome the shortcomings of the above-mentioned schemes, and make the related surveillance system have good concealment, high invulnerability, low cost, and convenient erection and installation.

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  • Low altitude target monitoring method based on microphones array network
  • Low altitude target monitoring method based on microphones array network
  • Low altitude target monitoring method based on microphones array network

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Embodiment Construction

[0009] pass figure 1 , figure 2 It can be seen that in the embodiment of the present invention, a plurality of high-sensitivity microphones such as microphone 1, microphone 2 to microphone n are arranged as sensors in a spatial array or a plurality of microphones are arranged in an area array or a line array. The output of each sensor is not simply summed up by increasing the equivalent antenna aperture and improving the spatial angle resolution, but is processed by an adaptive processor and then superimposed to form an adaptive sensor array, referred to as an adaptive array. The aerial acoustic signal received by each microphone in the adaptive array is converted into an electrical signal, which is sent to an embedded processing system composed of a digital signal processor (DSP) or a field programmable gate array (FPGA) for adaptive beamforming. The signals collected by multiple array elements are weighted by the beamformer to align the original main lobe in a specific dir...

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Abstract

The invention discloses a low-altitude target monitoring method based on microphone array networking, and belongs to the technical field of low-altitude target monitoring passive positioning. Aiming at the needs of air traffic control blind spots and monitoring non-cooperative targets in sparsely populated remote areas, through a reasonable layout of microphone arrays, multi-sensor data fusion systems, and a low-altitude target monitoring network structured by multi-hop packet wireless networks, it is composed of multiple sensors in the form of spatial arrays A single microphone array, so that each microphone in the array receives the sound wave signal radiated by the aircraft vibrating air, through the adaptive beam processor, using beamforming and other algorithms, using the beam control delay line, changing the direction to control the delay of the delay line, and measuring the target Direction of Arrival; multiple adaptive processors are superimposed to form an adaptive sensor array, so that multiple microphone arrays can be processed by multiple adaptive sensor arrays to obtain multi-target direction of arrival information, and multi-hop packet wireless network to multi-sensor data fusion The system performs information fusion and extracts the track information of the target.

Description

1. Technical field [0001] The invention relates to control and signal processing, microelectronic computer technology, communication network technology and sensor technology, and especially belongs to the technical field of low-altitude target monitoring and target passive positioning. 2. Background technology [0002] At present, domestic and foreign research literature on microphone array and passive positioning technology mainly focuses on the single array positioning method itself, and its application in speech enhancement, blind source acoustic signal separation, noise source and robot positioning. The technology of directly networking multiple microphone arrays, adopting multi-sensor data fusion, and using it for low-altitude target positioning and monitoring has not been reported yet. For example, Ju Tailiang et al., "Research on Two-Dimensional DOA Estimation Algorithm of Sound Source Based on Arbitrary Microphone Array" (Journal of Communications, No. 8, 2005), main...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/06G01S5/20
Inventor 王永德
Owner WISESOFT CO LTD
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