Respiration testing device

Abstract

The invention provides a respiration testing device which has the advantages of small volume, low power consumption and high precision. The respiration testing device comprises a shell and a contraction band; the device provided by the invention can record and test the respiratory rate and amplitude according to the periodical change generated by the chest and abdomen when a person breathes. According to the respiration testing device, the shell is internally provided with a photoelectric sensor. The contraction band penetrates through the shell, one elastic side of the contraction band is provided with a stripe band, and the other elastic side of the contraction band is fixed to the shell. The stripe band is positioned inside the shell, and penetrates through the middle of the photoelectric sensor, and a certain gap is reserved between the two. By stretching the contraction band, the stripe band and the photoelectric sensor generate relative movement, and thus the movement displacement is obtained. As the input result is only relevant to the movement position of the stripe band, the anti-interference capacity of the device is strong. The contraction band is adjustable in length, and thus the demands of different people can be satisfied.

Description

Technical field [0001] The invention relates to a breathing detection device, in particular to a breathing frequency and amplitude detection device Background technique [0002] Respiration is an important parameter in physiological testing. It can be tested in a non-contact and dynamic manner. It has important research value in various research fields such as sleep disease diagnosis, clinical monitoring, and feedback adjustment of the cardiovascular system. In monitoring technology, respiratory rate detection is an important part of it. [0003] There are many ways to detect breathing. The commonly used detection methods are: 1. Pressure method 2. Temperature sensing method 3. Impedance method; commonly used sensors include: resistance strain sensors, temperature sensors, flow sensors, capacitive sensors, etc. , But these breathing detection methods have certain disadvantages to a certain extent. [0004] The first method mainly uses a resistance strain sensor, which uses the defo...

AI Technical Summary

Problems solved by technology

[0003] There are many methods for breath detection. The commonly used detection methods are: 1. Pressure method 2. Temperature sensing method 3. Impedance method; Commonly used sensors include: resistance strain sensor, temperature sensor, flow sensor, capacitive sensor, etc. , but these breathing detection methods all have some shortcomings to a certain extent

[0004] The first method mainly uses a resistance strain sensor, which detects the deformation of the chest and abdomen when the breathing gas is used during the breathing process of the human body, and the strain sensor can detect this deformation to detect the respiratory signal, but the resistance strain sensor If the resistance in the sensor is too small, the required driving current will be too large, causing the temperature of the strain gauge to be too high due to heating, and the output signal will have a significant zero drift, which will complicate the designed zeroing circuit; The second method is mainly to use the temperature sensor to collect the breathing temperature difference inside and outside the nasal cavity or cavity and convert it into electrical output. It is sensitive to the temperature of the external environment, so that the detection result is too affected by the external environment; the third method is mainly to detect the respiratory signal through the impedance change caused by the change of the chest and abdomen, but generally needs to stick electrodes on the human skin. cumbersome and less accurate

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