Patent ID: 9496954
Filing Date: 2016-11-15
CPC Classification: H04B

Claim Text:
1. A sensor terminal that is worn by a person, and detects that respective wearers face each other by the aid of an optical communication, comprising: a control unit that controls the sensor terminal; and a plurality of optical transmit/receive units each having at least one of a transmission unit that emits the light to transmit data, and a reception unit that receives the light to receive the data, wherein the plurality of optical transmit/receive units are arranged within a housing of the sensor terminal, wherein the plurality of optical transmit/receive units are arranged so that light emission axes of the transmission units, or extension lines of light detection axes of the reception units approaches each other, wherein the plurality of optical transmit/receive units each include the transmission units and the reception units, wherein the sensor terminal comprises: a transmission unit switching unit that switches the transmission units included in the plurality of transmit/receive units to be valid or invalid, individually, and a reception unit switching unit that switches the reception units included in the plurality of transmit/receive units to be valid or invalid, individually, and wherein it is determined whether a valid reception unit to be diagnosed can receive the light emitted by the valid transmission unit to be diagnosed, or not, in a state where the transmission unit to be diagnosed is validated by the transmission unit switching unit, and the reception unit to be diagnosed is validated by the reception unit switching unit, to diagnose the abnormality of the transmission unit and the reception unit which are to be diagnosed.