Alarm triggering method for sensor and electronic device using the same

An electronic device comprising:

• a sensor;
• an analog-to-digital converter, coupled to the sensor, and configured to receive a sensor signal from the sensor and convert the sensor signal to a signal magnitude;
• a memory, configured to store data;
• and
• a processor, coupled to the analog-to-digital converter and the memory, and configured to:
• determine whether a signal magnitude of the sensor signal satisfies a first triggering condition by comparing the signal magnitude of the sensor signal with a first determination threshold;
• when the signal magnitude satisfies the first triggering condition, determine whether the signal magnitude satisfies a second triggering condition according to a second determination threshold and determining whether the signal magnitude satisfies a third triggering condition according to a time determination threshold, wherein the second determination threshold is greater than the first determination threshold;
• when the signal magnitude satisfies one of the second triggering condition and the third triggering condition, determine that the sensor is in an alarm state so as to output an alarm signal;
• and
• when the signal magnitude does not satisfy the second triggering condition and the third triggering condition, determining that the sensor is in a false-alarm state.