Fabric sensor design method and fabric respiration measuring device

Abstract

The invention relates to a fabric sensor design method and a fabric respiration measuring device. The fabric sensor design method includes the following steps that (1) self-inductance of silver-plated conductive yarns is composed of internal inductance and external inductance; (2) the magnetic field intensity and the magnetic induction intensity of the position which is x away from the axis of the silver-plated conductive yarns are obtained; (3) an area with the width being dx and the length being 1 is obtained in the position which is x away from the axis of the silver-plated conductive yarns, and the magnetic flux and the magnetic flux linkage are obtained; (4) the total magnetic flux linkage of the interior of the silver-plated conductive yarns is obtained; (5) the internal inductance per unit length of the silver-plated conductive yarns is obtained; (6) a point P (x, y) is selected randomly outside the silver-plated conductive yarns, and the magnetic induction intensity of the silver-plated conductive yarns at the point P (x, y); (7) the total magnetic flux linkage of the exterior of the silver-plated conductive yarns is obtained; (8) the external inductance per unit length of the silver-plated conductive yarns is obtained; (9) the inductance per unit length of the silver-plated conductive yarns is obtained; and (10) the fact that the inductance of the silver-plated conductive yarns is related to the position of the silver-plated conductive yarns is known, and then respiration signals and the respiration rate are obtained indirectly. The fabric sensor design method and the fabric respiration measuring device are suitable for monitoring of the respiration signals and the respiration rate in daily life and exercise state.

Description

Technical field [0001] The invention relates to a sensor design method and a respiration measurement device, in particular to a fabric sensor design method and a fabric respiration measurement device based on breath induction plethysmography used in the field of human body signal measurement. Background technique [0002] In the normal physiological activities of the human body, physiological information such as respiratory signal and respiratory rate are important indicators of the health of the cardiopulmonary function. The respiratory rate is very important for the diagnosis and treatment of cardiovascular, tracheal and bronchial respiratory diseases and obesity and other chronic diseases. Significance. With the development of disciplines such as electronics, measurement science, and clinical medicine, research on respiratory signal measurement methods and signal sensing devices has gradually increased in recent years. [0003] Respiratory signal measurement methods mainly incl...

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Problems solved by technology

[0004] In the measurement of wearable respiratory signal and respiratory frequency, the measurement accuracy of the strain sensor in the piezoelectric respiration measurement method is proportional to the magnitude of the thoracic contact pressure, which is not suitable for measurement during exercise; the measurement principle of the thoracic impedance method requires continuous access to High-frequency and small current signals are used as the excitation signal source. This method has potential safety hazards for measurers suffering from cardiovascular and cerebrovascular diseases, and is not suitable for long-term measurement; however, the respiratory induction plethysmography method using an inductance constructed of a metal coil as a measurement carrier cannot solve the problem. Wearing comfort, measurement coil standardization and other issues, so it is also not suitable for long-term wearable respiratory signal and respiratory rate measurement

The above three methods are not suitable for the measurement of respiratory signal and respiratory rate during exercise due to their inherent reasons of measurement principle and measurement method.

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