| 摘要 |
<p>A wireless birth alarm for livestock, such as mares, cows or ewes, comprising position sensing and signal emitting means to be secured to the animal, which means close a contact and emit a signal when the animal takes up a position that may be characteristic of the onset of parturition for that animal, as well as a signal receiver comprising a circuit which, upon receiving an uninterrupted signal, after a settable threshold interval has elapsed, can activate an alarm, wherein at the receiver the circuit can be set in a position where the alarm is only activated if the continuously received signal is interrupted for a period of time the length of which depends on the animal species and then resets again. <IMAGE></p> |
