Abstract: A blood oxygen sensing device includes a sensor, a processing module and a display module. The sensor emits first and second sensing light sources to a to-be-sensed target alternately, and generate first and second sensing signals. The processing module generates first and second sensing signal base lines, generates a heartbeat pulse signal according to the first and second sensing signals matching a first preset range, records a pulse amplitude signal and a DC signal of the heartbeat pulse signal matching a second preset range, and generates a blood oxygen value and a pulse value according to the pulse amplitude signal and the DC signal. The processing module chronologically sorts the blood oxygen values and the pulse values in a sequential order, respectively. The display module is connected to the processing module and receives and displays the blood oxygen value and the pulse value updated.

Abstract: An automatic positive pressure breathing apparatus is provided, applicable to connect an upper respiratory tract of a user, which includes a gas generator, a gas flow sensing device, a humidification device, a heating device, a breathing tube, and a mask device. The gas generator includes a signal processing module and a filter. Wherein the signal processing module includes a control circuit and the filter is embedded in the gas generator. The first connecting end of the gas flow sensing device is positioned at one end of the gas flow sensing device and is connected to one side of the gas generator. The second connecting end is positioned at the other end of the gas flow sensing device. The gas flow sensing device includes a first pressure sensing element, a second pressure sensing element, and a radial structure.

Abstract: A respirator structure is provided, which includes a gas supply device. The gas supply device includes a supply device main body, an absorbing vibration module and a gas generating module. The supply device main body is a hollow structure and has an accommodating space and two via holes. The absorbing vibration module is on the accommodating space and has a substrate layer, a flow channel layer, a bearing layer, and a gas generating module. A flow channel layer has a passage and a passage opening. A bearing layer has a bearing part and a bearing opening. The gas generating module has an air inlet and an air outlet. Air flows to the passage through the via holes, the accommodating space and the passage opening, and the gas generating module inhales the air by the air inlet to produce and discharge the air flow outside the supply device main body.