Road surface condition determination device performing sensing based on different sensing conditions

A road surface condition determination device comprising a tire side device attached to each of a plurality of tires of a vehicle, and a vehicle body side system provided in a vehicle body, the road surface condition determination device having, in addition to a road surface condition determination, a weight detection function for detecting a weight applied to a wheel to which the tire is attached, wherein:

• the tire side device includes a vibration detection unit configured to output a detection signal corresponding to a magnitude of vibration of the tire, a control unit configured to perform a sensing that generates road surface data indicating a road surface condition appearing in a waveform of the detection signal or weight-related data related to the weight, and a first data communication unit configured to transmit the road surface data or the weight-related data;
• the vehicle body side system includes a second data communication unit configured to receive the road surface data or the weight-related data transmitted from the first data communication unit, a road surface determination unit configured to determine a road surface condition of a traveling road surface of the vehicle based on the road surface data, a weight detection unit configured to detect the weight based on the road-related data;
• and
• the control unit of the tire side device of at least one of the plurality of tires and the control unit of the tire side device of at least another one of the plurality of tires are configured to perform the sensing by different sensing conditions and generate the weight-related data and the road surface data, respectively.

A road surface condition determination device comprising a tire side device attached to each of a plurality of tires of a vehicle, and a vehicle body side system provided in a vehicle body, the road surface condition determination device having, in addition to a road surface condition determination, a weight detection function for detecting a weight applied to a wheel to which the tire is attached, wherein:

• the tire side device includes a vibration detection unit configured to output a detection signal corresponding to a magnitude of vibration of the tire, a control unit configured to perform a sensing that generates at least one of road surface data indicating a road surface condition appearing in a waveform of the detection signal and weight-related data related to the weight, and a first data communication unit configured to transmit the road surface data or the weight-related data;
• the vehicle body side system includes a second data communication unit configured to receive the road surface data and the weight-related data transmitted from the first data communication unit, a road surface determination unit configured to determine a road surface condition of a traveling road surface of the vehicle based on the road surface data, a weight detection unit configured to detect the weight based on the weight-related data;
• and
• the control unit of the tire side device of each of the plurality of tires generates one of the road surface data and the weight-related data, and the control unit of the tire side device of only a part of the plurality of tires generates an other of the weight-related data and the road surface data.