Automatic dosage-controlled atomizer, and respiration sensor

An automatic dosage-controlled atomizer, comprising:

• a medication atomizer that is configured to generate an aerosol airflow, and that includes a nozzle for delivering the aerosol airflow;
• and
• a respiration sensor that includes:
• a capacitive electrode assembly that is mounted to said nozzle, that is disposed to receive a respiratory airflow from a user who is using said automatic dosage-controlled atomizer, and that is configured to have a varying capacitance which is positively correlated to a flow rate of the respiratory airflow;
• a resonant circuit that is configured to have a reference inductance and a reference capacitance, and that is connected to said capacitive electrode assembly in parallel, so as to induce a total capacitance equaling a sum of the varying capacitance and the reference capacitance for a combined circuit of said capacitive electrode assembly and said resonant circuit;
• a signal analyzing circuit that is electrically connected to said resonant circuit, and that is configured to generate and send a feed signal to said resonant circuit in such a way that said resonant circuit generates a resonant signal based on the feed signal, and to perform frequency analysis on the resonant signal to generate a frequency variation signal indicating a frequency variation of the resonant signal, where the frequency variation of the resonant signal is related to the varying capacitance;
• and
• an atomization adjustment module that is electrically connected to said signal analyzing circuit and said medication atomizer;
• wherein said signal analyzing circuit includes a database that records a plurality of vital capacity values, and a plurality of reference frequency variation values that respectively correspond to the vital capacity values;
• wherein said signal analyzing circuit is configured to, based on said database, determine one of the vital capacity values that corresponds to the frequency variation of the resonant signal to be a detected vital capacity value by comparing the frequency variation of the resonant signal with the reference frequency variation values;
• wherein said signal analyzing circuit is configured to perform periodic analysis on the frequency variation signal to obtain a period time data piece related to the frequency variation signal, where the period time data piece includes an inhalation time value and an exhalation time value;
• wherein said atomization adjustment module is configured to receive the detected vital capacity value and the period time data piece from said signal analyzing circuit, and to generate a cumulative effective inhaled dose value based on the detected vital capacity value and the period time data piece;
• and
• wherein said atomization adjustment module is configured to compare the cumulative effective inhaled dose value with a predetermined dose threshold value to generate and send a control signal to said medication atomizer in such a way that said medication atomizer stops generation of the aerosol airflow when the cumulative effective inhaled dose value exceeds the predetermined dose threshold value.