| 主权项 |
1. A liquid storage device, comprising:
a liquid storage formed with a storage chamber for storing liquid; a plurality of first communication devices each configured to transmit a radio wave for carrying out short distance wireless communication; a second communication device configured to receive the radio wave transmitted from each of the plurality of first communication devices; and a controller, the plurality of first communication devices being arranged in a configuration corresponding to a direction of a movement of a boundary surface between a stored area where the liquid is stored in the storage chamber and a non-stored area where the liquid is not stored in the storage chamber, the movement being caused by one of an increase and a decrease of an amount of the liquid stored in the storage chamber, a portion of the storage chamber being interposed between the second communication device and each of the plurality of first communication devices, the controller being configured to detect a position of the boundary surface based on a reception status of the radio wave transmitted from each of the plurality of first communication devices and received by the second communication device. |
