CN-121150846-B - Intelligent space equipment data transmission bus arrangement method and equipment

CN121150846BCN 121150846 BCN121150846 BCN 121150846BCN-121150846-B

Abstract

The invention discloses a data transmission bus arrangement method and equipment of smart space equipment, which relate to the technical field of smart space wireless communication and comprise the steps of setting the position of objective function computing equipment, dividing a smart space into three-dimensional grids, distributing indexes for each grid, mapping equipment coordinates to the grid indexes, computing grid occupation probability, generating path occupation marks, respectively computing the number of direct sound window samples and the number of reverberation window samples, dividing the direct sound energy by the reverberation sound energy, computing linear DRR, computing the mean square vibration energy of the equipment, combining the path occupation probability and the average vibration energy, computing vibration coupling energy, and converting the vibration coupling energy into linear power and linear signal to noise ratio based on the received signal strength. The invention improves the accuracy of effective bandwidth estimation by combining the fast Fourier transform with the power delay spectrum calculation, and improves the rationality of link screening by combining the path occupation probability with the DRR utilization factor.

Inventors

ZHANG XUN
PAN YIJIE
Xiao Naian
GUO JIAYANG
XU MEIYAN

Assignees

宁波数字孪生(东方理工)研究院
浙江摩根集团有限公司
厦门市第三医院

Dates

Publication Date: 20260508
Application Date: 20250915

Claims (8)

1. A method for arranging a data transmission bus of intelligent space equipment is characterized by comprising the following steps of, Collecting equipment data, preprocessing, setting an objective function to calculate the equipment position, dividing a smart space into three-dimensional grids, distributing indexes for each grid, mapping equipment coordinates to grid indexes, calculating grid occupation probability, and generating a path occupation mark; Respectively calculating the number of direct sound window samples and the number of reverberation window samples, dividing the direct sound energy by the reverberation sound energy, calculating linear DRR, calculating mean square vibration energy of equipment, calculating vibration coupling energy by combining path occupation probability and average vibration energy, and converting the vibration coupling energy into linear power and linear signal-to-noise ratio based on the received signal strength; Performing fast Fourier transform on the radio frequency signals, calculating effective bandwidth, combining linear signal-to-noise ratio and the effective bandwidth, calculating theoretical maximum throughput, generating comprehensive link quality, screening equipment pairs, generating an effective link set, calculating the number of data packets distributed by each link, packaging the data packets, generating formatted data packets, and transmitting and receiving the formatted data packets; the calculating the number of direct sound window samples and the number of reverberant window samples, respectively, dividing the direct sound energy by the reverberant sound energy, and calculating the linear DRR includes: Calculating a time average value of the acoustic signal as a reference signal, and generating an acoustic impulse response through cross-correlation of the acoustic signal and the reference signal; Respectively defining a direct sound window and a reverberation window by using a fixed time window dividing method, and respectively calculating the number of direct sound window samples and the number of reverberation window samples; respectively calculating energy of direct sound and reverberant sound based on the acoustic impulse response, the direct sound window and the reverberant window; Dividing the direct acoustic energy by the reverberant acoustic energy to calculate a linear DRR; The combined path occupancy probability and the average vibration energy calculate vibration coupling energy, and based on received signal strength, the vibration coupling energy is converted into linear power and linear signal to noise ratio, and the method comprises the following steps: Calculating mean square vibration energy of the device based on the triaxial acceleration data and generating average vibration energy; Calculating vibration coupling energy by combining the path occupation probability and the average vibration energy; and calculating the intensity of the received signal based on the received power, carrying out mean value smoothing processing, converting into linear power based on the intensity of the received signal, carrying out normalization processing, calculating the signal to noise ratio based on the intensity of the received signal after mean value smoothing, and converting into linear signal to noise ratio.
2. The method for arranging the data transmission buses of the intelligent space equipment according to claim 1, wherein the steps of mapping equipment coordinates to grid indexes, calculating grid occupation probabilities and generating path occupation marks comprise the following steps: calculating the distance between devices based on UWB pulse signals, setting an objective function through a multidimensional scale analysis algorithm, and solving by using gradient descent to obtain the device position; acquiring a three-dimensional range of an intelligent space based on the equipment position, dividing the three-dimensional range into three-dimensional grids, distributing indexes for each grid, initializing an occupied grid matrix, and marking all grids as idle; mapping the equipment coordinates to grid indexes, and generating a grid sequence by using a cloth Lei Senhan mu three-dimensional linear algorithm; calculating a central coordinate for each grid in the path grid sequence, acquiring an obstacle coordinate through a building design drawing, and marking the grid as occupied if the central coordinate is positioned in the obstacle coordinate range; Based on the point cloud data, calculating the grid occupation probability, accumulating the grid occupation probability, generating the path occupation probability, setting a probability threshold value by using a statistical analysis method, marking the grid corresponding to the probability index larger than the probability threshold value as occupied, otherwise marking the grid as idle, and generating the path occupation mark.
3. The method for intelligent spatial device data transmission bus arrangement as set forth in claim 2, wherein said performing a fast Fourier transform on the radio frequency signal, calculating an effective bandwidth, and combining the linear signal-to-noise ratio and the effective bandwidth, calculating a theoretical maximum throughput, comprises: performing fast Fourier transform on the radio frequency signal, calculating channel impulse response, calculating a power delay spectrum based on the channel impulse response, calculating an autocorrelation function of the power delay spectrum, delaying the first decline of the autocorrelation function, calculating coherence bandwidth, and calculating effective bandwidth based on the coherence bandwidth; calculating theoretical maximum throughput by combining the linear signal-to-noise ratio and the effective bandwidth; based on the linear DRR, a DRR utilization factor is calculated.
4. The method for arranging the data transmission buses of the intelligent space equipment according to claim 3, wherein the steps of generating an effective link set, calculating the number of data packets distributed by each link, packaging the data packets, generating formatted data packets, transmitting and receiving comprise the following steps: Calculating the comprehensive link quality by combining the normalized linear power, vibration coupling energy, path occupation probability, theoretical maximum throughput and DRR utilization factor; Screening each pair of equipment (i, j) based on the comprehensive link quality, the path occupation mark and the received signal strength to generate an effective link set; Extracting the comprehensive link quality of the effective link, calculating the normalized link quality, and converting the normalized link quality into the priority fraction of the effective link; Sorting links according to descending order of priority, selecting the first M links with highest priority, calculating the number of data packets distributed by each link, adding a time stamp for each data packet, and packaging the data packets to generate formatted data packets; the formatted data packets are transmitted using the transmission protocol IEEE 802.11, and the receiving end receives the transmitted formatted data packets.
5. The method for intelligent spatial device data transmission bus arrangement according to claim 1, wherein said collecting device data and preprocessing comprises: Collecting equipment data, and performing time synchronization, denoising and normalization; the device data includes device coordinates, UWB pulse signals, received power, acoustic signals, radio frequency signals, and triaxial acceleration data.
6. A smart space device data transmission bus arrangement device based on the smart space device data transmission bus arrangement method as claimed in any one of claims 1 to 5, characterized by comprising, The data preprocessing module is used for acquiring and preprocessing the multi-source equipment data; the grid path module is used for dividing the intelligent space into three-dimensional grids, mapping equipment coordinates to the grids, tracking paths among the equipment, and generating path occupation marks by combining building obstacle and point cloud data; The energy analysis module is used for calculating the ratio of linear direct sound to reverberant sound, and deriving the theoretical maximum throughput by combining the triaxial acceleration data and the path occupation probability; and the quality selection module is used for calculating the comprehensive link quality, screening effective links, distributing the number of data packets according to the priority of the links, and executing encapsulation and transmission.
7. A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the computer program is characterized in that the processor executes the computer program to implement the steps of the intelligent space device data transmission bus arrangement method as set forth in any one of claims 1 to 5.
8. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the smart space device data transfer bus arrangement method of any one of claims 1 to 5.

Description

Intelligent space equipment data transmission bus arrangement method and equipment Technical Field The invention relates to the technical field of intelligent space wireless communication, in particular to a method and equipment for arranging a data transmission bus of intelligent space equipment. Background With the rapid development of intelligent space, intelligent architecture and internet of things, efficient and stable data transmission among devices becomes an important foundation for realizing intelligent sensing and cooperative control, ultra-wideband, radio Frequency (RF), acoustic signal processing and multisource sensor fusion technologies are widely applied to the fields of indoor positioning, device interconnection and environment sensing, researchers provide a meshing space division method, and mapping and path planning of devices in an intelligent space range are realized through three-dimensional grid indexes, so that references are provided for management of data transmission paths. In the aspect of intelligent space data transmission, most methods cannot be combined with space modeling and path occupation characteristics to dynamically evaluate link transmission quality, and lack of accurate depiction of three-dimensional space environment and obstacle distribution, indexes (such as radio frequency power or acoustic energy ratio) of single signal dimension are difficult to resist multi-source interference in complex environments, so that link selection is not fine enough, and throughput reduction or data packet loss are easy to cause. Disclosure of Invention The present invention has been made in view of the above-described problems occurring in the prior art. Therefore, the invention provides a method and equipment for arranging a data transmission bus of intelligent space equipment, which solve the problems that most methods fail to combine space modeling and path occupation characteristics to dynamically evaluate link transmission quality, lack of accurate depiction of three-dimensional space environment and obstacle distribution, and difficulty in resisting multi-source interference in complex environment due to indexes (such as radio frequency power or acoustic energy ratio) of single signal dimension, so that the link selection is not fine enough, and throughput reduction or data packet loss is easy to cause. In order to solve the technical problems, the invention provides the following technical scheme: In a first aspect, the present invention provides a method for arranging a data transmission bus of a smart space device, comprising, Collecting equipment data, preprocessing, setting an objective function to calculate the equipment position, dividing a smart space into three-dimensional grids, distributing indexes for each grid, mapping equipment coordinates to grid indexes, calculating grid occupation probability, and generating a path occupation mark; Respectively calculating the number of direct sound window samples and the number of reverberation window samples, dividing the direct sound energy by the reverberation sound energy, calculating linear DRR, calculating mean square vibration energy of equipment, calculating vibration coupling energy by combining path occupation probability and average vibration energy, and converting the vibration coupling energy into linear power and linear signal-to-noise ratio based on the received signal strength; Performing fast Fourier transform on the radio frequency signals, calculating effective bandwidth, combining linear signal-to-noise ratio and the effective bandwidth, calculating theoretical maximum throughput, generating comprehensive link quality, screening equipment pairs, generating an effective link set, calculating the number of data packets distributed by each link, packaging the data packets, generating formatted data packets, and transmitting and receiving the formatted data packets. The invention is a preferable scheme of the intelligent space equipment data transmission bus arrangement method, wherein the mapping equipment coordinates to grid indexes, calculating grid occupation probability and generating path occupation marks comprises the following steps: calculating the distance between devices based on UWB pulse signals, setting an objective function through a multidimensional scale analysis algorithm, and solving by using gradient descent to obtain the device position; acquiring a three-dimensional range of an intelligent space based on the equipment position, dividing the three-dimensional range into three-dimensional grids, distributing indexes for each grid, initializing an occupied grid matrix, and marking all grids as idle; mapping the equipment coordinates to grid indexes, and generating a grid sequence by using a cloth Lei Senhan mu three-dimensional linear algorithm; calculating a central coordinate for each grid in the path grid sequence, acquiring an obstacle coordinate through a building design drawing, and ma