43 results about "Counting respirations" patented technology

A respiratory apparatus evaluates accuracy of a pressure sensor, such as when only a single pressure sensor is provided. The accuracy of the pressure sensor may be assessed based on pressure measurement obtained from the pressure sensor and a subordinate or secondary characteristic of the respiratory device such as altitude or atmospheric pressure. A controller or processor may calculate the altitude of the respiratory device based in part on the pressure measurement. In some embodiments, the assessment of the pressure sensor may involve an evaluation of the calculated altitude. In some cases, the assessment of the pressure sensor may involve determining an estimated pressure based on a calculated altitude, and comparing the pressure measurement obtained from the pressure sensor with the estimated pressure.

The invention designs a radar-based non-contact respiration detection method for pigs. A millimeter wave radar is creatively applied to respiration detection for pigs, and a depth camera detection in the prior art is replaced. A respiratory rate and a heart rate of pigs are calculated through steps of data collection, data preprocessing, signal separation, mobile noise pollution judgment and processing, respiratory rate calculation, harmonic wave removal and the like, whether heartbeat harmonic waves are overlapped with the respiratory rate or not is judged according to the calculated respiratory rate and the calculated heart rate, and if the overlapping exists, a designed filter needs to be used for filtering out heartbeat harmonic waves in breathing data and recalculating the respiratory rate. In conclusion, the non-contact respiratory rate monitoring method solves problems that the cost is high and the precision is relatively low when the respiratory rate of the pigs is detected through a depth camera. Meanwhile, accuracy of an final respiratory rate result is further improved through cooperation of a multiple spectrum estimation method, a mobile noise removal and a heart rate filter method.

A wearable device for continuously monitoring the respiratory rate of a patient, comprises three inertial sensors (10, 11, 12), the first inertial sensor (10) is positioned on the abdomen (13), the second inertial sensor (11) is positioned on the thorax (14), and the third inertial sensor (12) is positioned on a part of the body (15) not subject to respiratory movements, fixed with respect to thetorso. Each inertial sensor (10, 11, 12) comprises an accelerometer, a magnetometer, and a gyroscope. Each inertial sensor (10, 11, 12) comprises a microprocessor (21) connected to the accelerometer,magnetometer, and gyroscope. The microprocessor (21) is connected to a transmitter (22) and is configured to process the signals and supply to the transmitter (22) a signal represented by a quaternionthat describes the orientation of the three inertial sensors with respect to the Earth's reference system. A receiver (30) connected to a control centre (31) is configured to receive the abdominal quaternion of the first inertial sensor, the thoracic quaternion of the second inertial sensor, and the reference quaternion of the third inertial sensor and is configured to send them to the control centre (31). The control centre (31) is configured to process the quaternions received, so that the abdominal quaternion and the thoracic quaternion will be referenced to the reference quaternion. The control centre (31) comprises a band-pass adaptive filter (55, 56) that filters the signals represented by the abdominal quaternion and by the thoracic quaternion to eliminate the residual components linked to the movements of the patient. The control centre (31) is configured to calculate the respiratory rate from the signals represented by the filtered abdominal quaternion and the filtered thoracic quaternion.

The invention discloses a method for extracting a breathing state based on a radar signal, which comprises the following steps that: 1) a radar detection module transmits a modulated continuous wave, performs one-dimensional fast Fourier transform on the received modulated continuous wave of a plurality of periods, and calculates the frequency shift of the transmitted wave; (2) when the frequency shift of the transmitted wave deviates, the influence of environmental noise is removed, and a real motion signal of the chest is extracted; (3) judging whether the test target is in a human body normal breathing state, a body moving state or an unmanned state according to the extracted waveform signal; and 4) when the human body is judged to be in the normal breathing state, calculating a breathing value according to the waveform characteristics of the breathing signal, and then judging whether the apnea phenomenon occurs in the sleep process. According to the method, the respiration signals of the testee are collected, direct contact with the human body is not needed for measurement, operation is easy and convenient, and the human body moves freely.

The invention discloses a non-contact apnea detection device and method. According to the apnea detection device, the method comprises the steps of shooting a breathing video containing the chest andthe abdomen of a detected person in a sleeping or quiet state through a camera; performing spatial pyramid decomposition on the video; decomposing a pyramid layer of an interested area, respectively carrying out time domain band-pass filtering on the decomposed pyramid layer to obtain a frequency band related to thorax and abdomen breathing actions, amplifying a signal of the frequency band, extracting brightness information of pixel points of the amplified interested area, calculating a breathing rate, and judging normal breathing and abnormal breathing states by setting a dynamic threshold value of the brightness information. Therefore, all apnea states of the examinee in the shot video can be correctly judged. According to the invention, the respiratory rate of the photographed person can be correctly detected through the photographed video image in the sleep or quiet state of the human body, and whether apnea occurs in the video recording period or not can be correctly judged.

The invention discloses a respiratory system health monitoring method and device, the device comprises a processing system, an analysis terminal and a plurality of voltage change type detection elements, the processing system comprises a signal amplifier, a low-pass filter and an A/D converter, and the voltage change type detection elements, the signal amplifier, the low-pass filter, the A/D converter and the analysis terminal are connected in sequence. The pressure change type detection element generates an electric signal, and the processing system processes the electric signal and outputs a chest breathing oscillogram and an abdominal breathing oscillogram; and the analysis terminal calculates the respiratory rate and the respiratory energy, and judges whether the patient has a high respiratory risk, a medium respiratory risk or a low respiratory risk according to a calculation result. According to the method, the respiratory rate and the respiratory energy of the patient are calculated, and the evaluation index of the respiratory risk is formulated, so that the patients with medium and high respiratory risks can be distinguished, the patients can be treated and prevented, and the situation that the illness state of the patients suddenly deteriorates and cannot be found and treated in time is prevented.

The invention relates to a respiratory rehabilitation training device which comprises an abdomen exercise device, an upper limb exercise device and a respiratory data processing device, the abdomen exercise device comprises a pressing belt and an action turntable, the action turntable can rotate to wind two pull ropes to shorten the linear distance between the left end and the right end of the pressing belt, and the pressing belt is tensioned; the upper limb movement device comprises a left elbow movement device and a right elbow movement device and is used for dragging elbows on the left side and the right side of the patient according to a fixed track so as to achieve abduction of the upper limbs of the patient; the calculation module is used for calculating breathing time and frequency according to the numerical value of the electromyographic signal and judging the breathing type, and the adjustment module is used for controlling the actions of the action turntable and the pressing mechanism according to the numerical value of the electromyographic signal; the device is favorable for improving the respiratory function and core muscle group function of a patient, is convenient to use, is safe and non-invasive, and can be repeatedly trained.

The invention provides a respiration rate monitoring system. The respiration rate monitoring system comprises a data fusion module, a data reconstruction module and a respiration rate calculation module; the data fusion module is used for receiving multi-dimensional monitoring signals and conducting dimension reduction fusion on the multi-dimensional monitoring signals to obtain dimension reduction fusion data; the data reconstruction module is connected with the data fusion module and used for reconstructing the dimension reduction fusion data by using a graph model to obtain reconstructed data; and the respiration rate calculation module is connected with the data reconstruction module and used for determining an effective wave crest in the reconstructed data and calculating a respiration rate in combination with a signal sampling frequency to automatically monitor a respiratory rate of a user.