| 摘要 |
PURPOSE: A ground selection apparatus is provided to provide safety during using a home electric mat by improving shielding property and visibility of an electric field and detecting ground voltage easily by a volume control knob. CONSTITUTION: A power line(100) provides the power source from the pillar shaped transformer. A conductive fabric(300) absorbs the electric field of a heating wire through the ground voltage circuit selected with a variable resistor(200), in order to have the same voltage with the ground voltage of a selected variable resistance part. It is formed into the aluminum foil or the copper wire. A voltage drive element(400) is formed in circuit between the conductivity cloth and the variable resistance part. |
