Differential orientation sensor system
A directional sensor, specific direction technology, applied in the sensor, electrostatic sensor, sensor type and other directions, can solve the problem that the performance of the omnidirectional sensor array is not enough to meet the array gain and so on
Pending Publication Date: 2022-06-03
ALIBABA GRP HLDG LTD
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Problems solved by technology
Although some algorithms have been proposed to filter these unwanted signals, there are still certain problems with existing omnidirectional sensor arrays
For example, existing omnidirectional microphone arrays suffer from low white noise gain (WNG) at low frequencies and a drop in directivity index (a measure of directional characteristics) at high frequencies
In addition, the array performance of existing omnidirectional sensor arrays is insufficient to meet certain specifications (such as array gain)
Method used
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Overview
[0013] As mentioned above, although the existing omnidirectional sensor and omnidirectional sensor array allows signal detection in all directions, there are many inherent problems. These problems may seriously affect the purpose of the omnidirectional sensor and the omnidirectional sensor array, which is limited The practical application of these comprehensive sensors and comprehensive sensor arrays.
[0014] This application describes an example of a differential orientation sensor system. Differential orientation sensor systems may include multiple directions (for example, unidirectional) sensors arranged in specific geometric structures. Specific geometric structures can be two -dimensional or three -dimensional, for example, it depends on the corresponding application or use of the differential orientation sensor system. In the implementation, the geometric structure can be formed by a number of circles with a common center or a number of different centers. Among th...
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Obtaining input signals received by a plurality of directional sensors arranged in a specific configuration; transforming the input signal from a time domain to a frequency domain to obtain a corresponding frequency band; applying a predetermined weight group to a corresponding frequency band in the frequency domain to obtain a combined frequency band; and transforming the combined frequency band from a frequency domain to a time domain to obtain an output signal. The particular geometry may be two-dimensional or three-dimensional. In addition, the particular geometry may be formed from, for example, multiple circles having a common center or multiple sets of circles having different centers, where each set of circles has the same center.
Description
Background technique [0001] With the emergence of signal sensing and processing technology, omnidirectional sensors and omnidirectional sensor arrays (ie, omnidirectional sensor arrays) are developed and applied to various technical fields. The omnidirectional sensor or omnidirectioner array is configured to receive and detect signals from all directions, and therefore does not need to be mechanically rotated in different directions in different directions. Examples of omnidirectional sensors can include omnidirectional microphone, omnidirectional camera, and omnidirectional radio antenna. [0002] However, due to this omnidirectional characteristics, there are many inherent problems in existing omnidirectional sensors and omnidirectional sensor arrays. Taking omnidirectional microphone / omnidirectional microphone array as an example. Because the omnidirectioner / omnidirectional sensor array can pick up signals from all directions, the omnidirectioner / omnidirectional sensor array ma...
Claims
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IPC IPC(8): G10L21/0232H04R5/00
CPCG10L2021/02166G10L21/0208H04R2430/03H04R2201/401H04R19/00H04R2201/003H04R1/406H04R2430/25
Inventor 黄伟隆冯津伟
Owner ALIBABA GRP HLDG LTD