| 摘要 |
A system for detecting estrus in cows comprising an apparatus for detecting their rate of motor activity (movement). A transmitter 3 individual to a cow sends a very short burst of energy to a receiver, at a rate depending on the movement rate of the cow, which counts or records the bursts graphically. The bursts are such as to conserve battery power, minimizing servicing thereof, a burst of a predetermined period and of a frequency individual to the cow being transmitted via an aerial 4 each time a mercury switch attached to the transmitter is closed. Count rate of as much as 50% increase indicates reliably the presence of estrus, and a count rate significantly lower than normal can indicate illness. <IMAGE> |
