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Sound-based object drop point positioning method

A positioning method and object technology, applied in location information-based services, specific environment-based services, electrical components, etc., can solve problems such as being susceptible to interference from other signals and noise, poor civilian popularity, and limited signal transmission range, etc. achieve good scalability

Active Publication Date: 2019-06-28
XIJING UNIV
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AI Technical Summary

Problems solved by technology

Among them, Bluetooth communication and WiFi technology are related to the network coverage radius, the signal transmission range is limited, and it is easily interfered by other signals and noise; because light cannot pass through obstacles, infrared technology can only transmit at the line of sight, once encountering obstacles, Infrared technology cannot be used normally; radar tracking technology is generally widely used in military equipment, the cost is relatively high, and the popularity of civilian use is relatively poor

Method used

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  • Sound-based object drop point positioning method
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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] The present invention is based on the method for locating the falling point of an object based on sound, and the specific workflow is as follows: figure 1 As shown, after the system is powered on and running, the aggregation node first initiates a networking command, and each beacon node builds a network according to the protocol. The server configures the parameters of the system, packs the set parameters into a control data frame and sends it to the sink node; the sink node parses the command and distributes it to each beacon node. After the parameter setting is completed, the server sends a clock synchronization command to the sink node; the sink node broadcasts the clock synchronization command to the network, and each beacon node receives the command, delays a fixed time to start the sound collection, signal processing, TOA estimation and other pr...

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Abstract

The invention discloses a sound-based object drop point positioning method, which comprises the following steps of: positioning an occurrence place of an effective event in a space formed by an aggregation node and eight beacon nodes; according to the invention, high-precision clock synchronization is realized by utilizing nRF24L01, and each beacon node realizes clock synchronization by followingan instruction of an aggregation node; constructing a relative coordinate system through the layout of each node, wherein each node can be randomly arranged; each node carries out event identificationon the collected sound locally, and estimation is carried out at the arrival time; each node establishes a wireless network through the nRF24L01 and sends the data to the server through the wirelessnetwork; and the server receiving the arrival time data of the beacon node, and positions and displays the effective event by using a TDOA positioning algorithm based on least square.

Description

technical field [0001] The invention relates to the technical field of location services, in particular to a sound-based method for locating the falling point of an object. Background technique [0002] At present, existing methods for locating objects mainly locate objects through Bluetooth communication, WIFI technology, infrared technology, and radar tracking technology. Among them, Bluetooth communication and WiFi technology are related to the network coverage radius, the signal transmission range is limited, and it is easily interfered by other signals and noise; because light cannot pass through obstacles, infrared technology can only transmit at the line of sight, once encountering obstacles, Infrared technology cannot be used normally; radar tracking technology is generally widely used in military equipment, the cost is relatively high, and the popularity of civilian use is relatively poor. Contents of the invention [0003] In order to overcome the deficiencies o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W4/06H04W4/33H04W4/38H04W56/00H04W64/00
Inventor 赵巧绒张磊李勇强李兵强
Owner XIJING UNIV
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