| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric fence allowing passage of a man through a desired position without getting electrical shock and enabling easy confirmation of imposed voltage. <P>SOLUTION: The electric fence includes an electrically conductive member encircling a prescribed area; a first voltage generation circuit electrically connected with the electrically conductive member and imposing a first voltage to the electrically conductive member; a third voltage generation circuit electrically connected with the electrically conductive member and imposing a third voltage lower than the first voltage to the electrically conductive member when a second voltage lower than the first voltage is imposed to the electrically conductive member; and an announcing device detachably attached to the electrically conductive member in an electrically conductive manner and provided with a first announcing means issuing an announcement when the announcing device is connected to the electrically conductive member imposed with the first voltage, a second voltage generating means capable of generating the second voltage, and a second announcing means for issuing an announcement when the second voltage is generated by the second voltage generating means. <P>COPYRIGHT: (C)2013,JPO&INPIT |
