Patent ID: 8633683

Claim:
An apparatus with an abnormality determination function, comprising: a substrate at least a part of which is constituted of a dielectric body, an electrode portion disposed on the surface or in the internal portion of the dielectric body constituting the substrate and having at least three electrodes, and a voltage-applying portion capable of applying an alternating-current voltage to an electrode constituting the electrode portion; wherein the apparatus is further provided with an abnormality determination means for determining abnormality of the apparatus where at least two different combinations of two electrodes are selected from the at least three electrodes, an alternating-current voltage is applied to an electrode of two electrodes in one combination out of the at least two different combinations by the voltage-applying portion to measure a value of a current flowing to the other electrode of the one combination via the dielectric body by electrostatic coupling, an alternating-current voltage is applied to an electrode of two electrodes in at least another combination out of the at least two different combinations by the voltage-applying portion to measure a value of a current flowing to the other electrode of the combination via the dielectric body by electrostatic coupling, and an abnormality of the apparatus is determined from the current values measured; wherein the substrate is an apparatus main body long in one direction and having at least one through-hole formed in one end portion, and the electrode constituting the electrode portion is constituted of at least a pair of measurement electrodes disposed on the inside surface or in the internal portion of the wall on one side of the through-hole and at least it pair of dust-collecting electrodes embedded in the internal portion of walls facing each other and forming the through-hole and outward with respect to the embedding position of the pair of measurement electrodes and covered with a dielectric body.