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Human body positioning method based on intelligent floor mat
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A positioning method and floor mat technology, which are used in navigation, instrumentation, mapping and navigation, etc., can solve the problems of increasing the number of optical fiber sensors, reducing the sensing efficiency, and increasing the cost of optical fiber deployment, so as to improve the sensing efficiency and human body positioning. The effect of high precision and reduced deployment cost
Active Publication Date: 2021-11-26
ZHONGKAI UNIV OF AGRI & ENG
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The latter, a biped-based human body positioning system, allows two adjacent grids to be triggered at the same time, and allows the human body to walk in eight adjacent directions, which improves the freedom and flexibility of human walking; but the optical fiber transmission required by the system The number of sensors increases, which greatly reduces the sensing efficiency and increases the cost of optical fiber deployment.
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Embodiment 1
[0030] The present invention provides a human body positioning method based on an intelligent optical fiber floor mat, which includes the following steps:
[0031] S1: Divide the human body activity area into N grids (N=N 0 ×N 0 ), in the form of N 0 Row N 0 A square matrix of columns, each grid covered by an independent floor mat, N 0 is a positive integer;
[0032] S2: Lay M optical fiber sensors on specific grid mats, M is a positive integer;
[0033] S3: Construct the optical fiber measurement matrix A according to the space-time joint coding, which is composed of a binary matrix with M rows and N columns. If the matrix element a mn If it is 1, it means that the mth optical fiber sensor is laid in the nth floor mat, otherwise it is not laid, m=1,2,...,M, n=1,2,...,N;
[0034] S4: When the human body walks on the floor mat, it has the cycle characteristics of one foot touching the ground, both feet touching the ground at the same time, and one foot touching the ground...
Embodiment 2
[0051] This embodiment is similar to Embodiment 1, and the difference is that in this embodiment, a 6×64 encoding measurement matrix is provided in this embodiment, and 6 optical fiber sensors 1 are respectively according to 6 row vectors of the measurement matrix (each The row vector contains 64 elements), which are sequentially deployed in the mat 2 of 8 rows and 8 columns (64=8×8). figure 2 The 6 sub-graphs correspond to the deployment methods of 6 optical fiber sensors 1, in which the white represents the element of the row vector is 1, and the optical fiber sensor 1 passes through the floor mat 2 to collect its pressure change information; the black represents the elements of the row vector If it is 0, the corresponding floor mat 2 does not deploy fiber optic sensor 1.
[0052] Such as image 3 As shown, the floor mat 2 includes an elastic pad 3, a fixed support 4 and a protective layer 5, and the elastic pad 3 is made of elastic materials, such as pearl cotton, silic...
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Abstract
The invention discloses a human body positioning method based on an intelligent floor mat. It includes the following steps: S1: Divide the human body activity area on the floor mat into N grids, where N is a positive integer; S2: Lay M optical fiber sensors on the divided grids, and M is a positive integer; S3: According to the space-time Combined encoding to construct the optical fiber measurement matrix A, which is composed of a binary matrix with M rows and N columns, if the matrix element a mn is 1, which means the first m A fiber optic sensor is laid on the n In a floor mat, otherwise it will not be laid, m =1,2,...,M, n =1,2,...,N; S4: When the human body walks on the floor mat, get the fiber measurement sequence; S5: Search the joint code of the corresponding measurement sequence in the codebook [a i, a ij ,a j ], each joint code in the codebook is in one-to-one correspondence with the position change information, so as to realize human body positioning. The positioning data is collected according to the characteristics of the gait of the human body when walking, which conforms to the law of free walking of the human body indoors, and has the characteristics of high positioning accuracy and low cost.
Description
technical field [0001] The invention relates to the technical field of positioning, and more specifically, to a human body positioning method based on an intelligent floor mat. Background technique [0002] Human target perception, positioning and tracking are the basis for realizing the smart home system. The realization of human body target positioning based on optical fiber mats is a new technology that has emerged in recent years. It has the characteristics of high precision, easy installation, energy saving, environmental protection, comfort and safety. [0003] Indoor human body positioning based on fiber optic floor mats usually divides the human body activity area into N grids, aiming to determine the grid position where the human body is located. At present, the single-target human body positioning system realized by the fiber optic floor mat is mainly divided into two types according to the ground contact state: single-grid-based positioning and biped-based positi...
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