Room mirror removal monitoring device with electronic toll collection function

A room mirror removal monitoring device with an electronic toll collection (ETC) function, in which an on-board unit (OBU) is built in a room mirror, the room mirror removal monitoring device comprising:

• a room mirror holder to which the room mirror having the ETC function is fixed and in which an insertion recess is formed toward windshield glass;
• a removal switch inserted into the insertion recess;
• a mirror base inserted into a first region that does not overlap the removal switch in the insertion recess and fixed to the windshield glass;
• and
• a monitoring part configured to monitor a removal state of the room mirror having the ETC function, wherein the monitoring part detects when the mirror base has been removed from the room mirror, wherein the monitoring part comprises:
• a base segment housed in the removal switch;
• a movable segment housed in a second region that does not overlap the base segment in the removal switch;
• a cable connected to the base segment and the movable segment and configured to transmit whether the base segment and the movable segment are put in a first state or a second state to an OBU printed circuit board (PCB);
• a first magnetic body disposed inside the mirror base and configured to pull the movable segment toward the base segment;
• a second magnetic body disposed inside the removal switch and configured to pull the movable segment in a direction opposite to the base segment, wherein a magnetic force of the second magnetic body is weaker than that of the first magnetic body;
• and
• a supercapacitor configured to power the monitoring part when power from a battery of a vehicle in which the monitoring part is located is unavailable;
• wherein the monitoring part is configured to, in response to determining that the power from the battery of the vehicle is available, execute a check of the removal state of the room mirror.