FIELD: human vital needs satisfaction.
SUBSTANCE: method includes: carriage pressure measurement using a pressure sensor; determination whether a carriage-paired terminal exists within the predetermined distance when the carriage pressure reduces to a predetermined pressure range; and activation of the alarm, in the event that no paired terminal is not detected.
EFFECT: invention provides the carriage with an automatic alarm function that prevents the loss of the person or object in the carriage and increases the safety of the person or object.
25 cl, 14 dwg
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