| 摘要 |
<p>Automatic alarm system applicable to persons who risk becoming victims of robbery (attack, assault) at their place of work, which is based essentially in constantly monitoring, by means of a sensor, the heart rate of this person, converting this, by means of an emitter powered by an array of batteries, into a signal with a frequency which is proportional to this rate, which is picked up by a fixed receiver located a short distance from the emitter, which, when the signal is frequent, as a result of an exceptional emotional state of the user, exceeds a certain limit and triggers the operation of any conventional alarm system.</p> |
