Patent ID: 8120212

Claim:
Method for controlling an electric fence energizer with periodic pulses, in which a proportion of a pulse capable of passing through a human body in contact with the said electric fence is higher than a danger threshold (S m ) not to be exceeded in the human body, the said danger threshold being relative to an electrical quantity of the pulse, the said energizer comprising or being associated with: means for determining a risk of the presence of a human body in contact with the said electric fence, or the absence of such a risk, means for calculating the proportion of a pulse capable of passing through a human body in contact with the fence, and means for limiting a pulse, wherein, during a pulse, when the said determination means have determined a risk of the presence of a human body in contact with the fence, and when the said calculation means have defined that the proportion of the said pulse capable of passing through the human body is higher than the said danger threshold (S m ), the said limiting means limit the said pulse such that the proportion of the said pulse received by the said human body is lower than the said danger threshold (S m ), the method further comprising a step of carrying out a measurement of the equivalent resistance across the terminals of the said energizer; and a step of determining the maximum proportion of the said pulse capable of passing through the said human body as a function of the said current equivalent resistance and of a preceding equivalent resistance measured during a preceding pulse.