Sensor for thorax-abdomen respiratory movement wave shapes

Abstract

The invention relates to a sensor for measuring thorax-abdomen respiratory movement wave shapes and belongs to the technical field of medical monitoring. The sensor is manufactured by means of the amorphous wire giant stress impedance effect. The sensor is tied to a part of the thorax-abdomen to be measured by a specially equipped thorax-abdomen belt. Due to the respiratory movement, the circumference of the thorax-abdomen is changed, the change of the circumference conducts acting force to a sensor probe through the thorax-abdomen belt, and the respiratory movement wave shapes of a human body are obtained by signal extraction, signal amplification and signal filtering. The sensor for the thorax-abdomen respiratory movement wave shapes has the advantages of being high in sensitivity, small in size, strong in anti-interference performance, low in power consumption and the like. The defects that currently, a breath sensor is large in size and not high in sensitivity are solved. The novel breath sensor is widely applied to respiratory monitoring, sleep respiratory disturbance monitoring, critical patient monitoring and clinic in medicine and home health care.

Description

technical field [0001] The invention relates to a sensor for measuring the human chest and abdomen respiratory motion waveform developed by utilizing the giant stress impedance effect of amorphous wires. It belongs to the technical field of medical monitoring. Background technique [0002] With the development of science and technology and the progress of society, the use of monitoring instruments for human chest and abdomen respiratory movement is also increasing. At present, there are three main types of sensors used for thoracic and abdominal respiratory movement monitoring: the first type uses electrodes to detect changes in thoracic impedance during respiration, and obtains relevant electrical signals. The second type uses an elastic inductive belt tied to the periphery of the chest and abdomen to detect displacement signals related to changes in the circumference of the chest and abdomen during breathing. The third type uses elastic resistance bands tied around the c...

AI Technical Summary

Problems solved by technology

Ineffective breaths due to upper airway obstruction are not recognized in Class 1 devices

The second type of device is susceptible to electromagnetic interference from the environment, and at the same time has low sensitivity to effective signal detection

However, due to the limited gauge coefficient of the strain resistance used, in order to improve the sensitivity of the sensor, the length of the strain beam needs to be increased, so that it is difficult to make the volume of the probe smaller; on the other hand, in order to reduce the volume, the sensitivity will decrease

It is difficult to achieve both small size and high sensitivity at the same time.

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