5 results about "Flow triggering" patented technology

The application discloses a verification method for triggering of a respiratory support device, a respiratory support device and a storage medium, and relates to the technical field of respiratory support devices. The method comprises the following steps: in step S1, when flow triggering is detected, the starting point time and the ending point time of flow triggering determination are acquired, and a real-time pressure curve segment in a time period from the starting point time to the ending point time is acquired; in step S2, the minimum pressure value is determined according to the real-time pressure curve segment, and the minimum pressure value is compared with a preset exhalation pressure value; in step S3, if the minimum pressure value is less than or equal to the preset exhalation pressure value, the pressure minimum point time corresponding to the minimum pressure value of the pressure curve segment is acquired; and in step S4, whether the flow triggering before the pressure minimum point time, the starting point time and the ending point time is a false triggering is determined according to the difference between the pressure minimum point time, the starting point time and the ending point time. The application aims to perform secondary verification on the pressure waveform after flow triggering, thereby effectively avoiding the false triggering phenomenon.

An apparatus and method of automatically controlling air throw into a destination area in a ventilation regulation system for conducting air forced from an air supply area to the destination area, the ventilation regulation system including a separating wall between air supply area and destination area, and a ventilation opening through the separating wall. An air regulation apparatus includes an air flow trigger reactive to the air flow rate from the air supply area, a damper in the ventilation opening, downstream / distinctly from the air flow trigger, and a coupling member coupling the air flow trigger to the damper, allowing the air flow trigger to control the damper. The damper automatically and continuously controlled by the air flow trigger adjusting at least the size of an effective ventilation opening through which air is injected into the destination area in reaction to the air flow rate in the air supply area.

The invention relates to the technical field of respiratory tract secretion drainage, and discloses a respiratory tract secretion suction device assistor which comprises a negative pressure display fixing mechanism, a flow guiding and intercepting mechanism is fixedly installed in the negative pressure display fixing mechanism, an intercepting triggering mechanism is installed above the flow guiding and intercepting mechanism, and a flow guiding and intercepting mechanism is installed above the flow guiding and intercepting mechanism. A conversion clamping mechanism is installed on the surface of the closure triggering mechanism, and an air inlet opening and closing mechanism is arranged on the surface of the flow guide closure mechanism. According to the auxiliary device of the respiratory tract secretion suction device, through the arrangement of the negative pressure display fixing mechanism, the flow guiding and intercepting mechanism, the intercepting triggering mechanism, the conversion clamping mechanism and the air inlet opening and closing mechanism, secretions can be conducted through the flow guiding and intercepting mechanism in the using process, and when the negative pressure of a system is too high, the auxiliary device is convenient to use. The switching clamping mechanism is triggered to be unlocked through closing of the air inlet opening and closing mechanism, then the closure triggering mechanism is driven to rapidly act, timely closure of the flow guide closure mechanism is achieved, and damage to the respiratory tract of a patient due to too high negative pressure is effectively prevented.

The application is suitable for the technical field of gas meter, and provides an ultrasonic gas meter flow triggering device, which comprises a Hall element, a magnet and a mechanical transmission part, the mechanical transmission part comprises a rotating plate, further comprises a stabilizing assembly, the stabilizing assembly comprises an arc-shaped rod, an arc-shaped tube, a horizontal tube, a channel, a ball and a sealing strip, and the application further discloses an ultrasonic gas meter, which comprises the above-mentioned ultrasonic gas meter flow triggering device and further comprises a shell, a gas flow channel, an air inlet and an air outlet, an ultrasonic probe, an intelligent controller and a battery. The Hall element, the magnet and the mechanical transmission part are arranged, the gas flow speed in the pipeline is sensed in a mechanical mode, when there is no gas flowing in the pipeline, the gas meter controller is in a low-power sleep mode; when there is natural gas flowing in the pipeline, a triggering signal is generated, an ultrasonic pulse is sent, the gas flow speed is measured, the consumption speed of the battery of the gas meter is greatly reduced, and great maintenance cost saving is brought.

This invention relates to the field of neurophysiological signal acquisition technology, and proposes an olfactory evoked potential acquisition system and method based on respiratory gas flow triggering. The system includes preprocessing the acquired inspiratory flow signal, identifying the inspiratory signal, and determining a valid inspiratory event when the inspiratory flow value, inspiratory flow rate of change, inspiratory duration, and local inspiratory integral value simultaneously meet preset conditions. A labeling signal is then sent to the EEG acquisition device to obtain a labeled event. For each labeled event's time node, waveforms within a set time period before and after the obtained EEG signal are extracted. The waveforms extracted from all labeled events are then superimposed and averaged to obtain the olfactory evoked potential signal waveform. This invention constructs a closed-loop triggered olfactory evoked potential acquisition architecture based on real inspiratory behavior, achieving precise synchronization between stimulus input and EEG labeling.