Pressure Distribution Reconstruction Method Based on Fast Newton One-step Iterative Algorithm
A technology of pressure distribution and iterative algorithm, which is applied in computing, computer-aided medical procedures, special data processing applications, etc., to achieve the effects of promoting cross-integration, broadening the scope of application, and reducing costs
Active Publication Date: 2018-04-06
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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The present invention can meet the requirements of existing pressure distribution reconstruction algorithms
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[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0042] Apply the human body pressure distribution detection system of the present invention such as figure 1 As shown, it mainly includes four parts: pressure pad 1, excitation power supply 2, signal processing system 3 and computer system 4. Electrodes are uniformly arranged on the surface edge of the pressure pad 1 for inputting excitation current signals and detecting voltage signals. The output of the excitation power supply 2 is connected to the pressure pad 1, and the excitation power supply is used to provide excitation current. The input of the signal processing system 3 is connected to the pressure pad 1, and is used for processing such as amplification and filtering of the detection signal output by the pressure pad. The input of the computer system 4 is connected with the output of the signal processing system, and is used for sign...
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The invention discloses a pressure distribution reestablishment method based on a fast Newton one-step iteration algorithm. The pressure distribution reestablishment method is characterized in that through the characteristic that the resistivity of a pressure pad (1) manufactured by adopting a piezoresistance material changes under pressure, excitation current is injected into the pressure pad (1) by adopting an excitation power supply (2); the edge voltage on the surface of the pressure pad (1) is simultaneously detected; back calculation is carried out by utilizing voltage information and adopting the fast Newton one-step iteration algorithm, so that the resistivity variation of the pressure pad is obtained; a force distribution situation of the pressure pad (1) is reestablished according to piezoresistance characteristics of the piezoresistance material. An obtained pressure distribution image can be used for analyzing postures of sitting, standing, walking, lying and the like of a patient, and rehabilitation assistant devices are regulated.
Description
technical field [0001] The invention relates to a pressure distribution reconstruction method, in particular to a pressure distribution reconstruction method based on fast Newton one-step iterative algorithm. Background technique [0002] China has entered a serious aging society, and paying attention to the health of the elderly is a hot issue of current social concern. At present, about 5% of the elderly suffer from hemiplegia, and the most effective treatment for hemiplegia patients is orthopedic rehabilitation. In orthopedic treatment, the measurement of pressure distribution in the human body is crucial to guide patients to better recovery. [0003] At present, the detection method for the pressure distribution of the human body mainly adopts pressure sensor array detection. The pressure sensors used are capacitive, resistive, piezoelectric, piezoresistive and so on. It uses the pressure change detected by the pressure sensors distributed in the array, and replaces t...
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IPC IPC(8): G06F17/50
CPCG06F30/23G16H50/20G16H50/50
Inventor 李士强王新立刘国强
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI