Abstract: It is an object, in a wheel attachment unit holding a rotary encoder externally attached to a wheel, to certainly acquire an encoder output signal obtained from a rotating shaft of a tire, by reducing an occurrence of a bending deformation or breakage of a unit component (e.g., shaft) occurred during a vehicle run and making the encoder function normally. A shaft, through which there is passed a cable for outputting a measurement result of the encoder whose rotating shaft is connected to the wheel, is arranged offset from the axle center by a predetermined amount and is held by a bracket attached to the vehicle, to be movable in the up and down direction. Alternatively, a holder for holding a stator of the encoder is attached to the body of the vehicle, by a rotary linkage mechanism to hold rotatably with five degrees of rotational freedom.

Abstract: A mechanism of an antenna for positioning, which is mounted on a measuring vehicle to measure locations of geographic features on and the side of roads and to collect road map information, and which is capable of highly-reliable measurement even when the vehicle is travelling, is realized. The antenna for positioning according to the present invention includes a positioning antenna to receive radio waves from a positioning satellite, a column, to the upper end of which the antenna is attached, and a cylindrical plate to cover the longitudinal direction of the column, wherein by use of the plate, a problem with the strength of the column to hold the positioning antenna is solved by reducing a lift force acting on the positioning antenna while the vehicle is travelling, and further, wind noise is reduced, and a cable is prevented from being damaged.

Abstract: A mechanism of an antenna for positioning, which is mounted on a measuring vehicle to measure locations of geographic features on and the side of roads and to collect road map information, and which is capable of highly-reliable measurement even when the vehicle is travelling, is realized. The antenna for positioning according to the present invention includes a positioning antenna to receive radio waves from a positioning satellite, a column, to the upper end of which the antenna is attached, and a cylindrical plate to cover the longitudinal direction of the column, wherein by use of the plate, a problem with the strength of the column to hold the positioning antenna is solved by reducing a lift force acting on the positioning antenna while the vehicle is travelling, and further, wind noise is reduced, and a cable is prevented from being damaged.

Abstract: It is an object, in a wheel attachment unit holding a rotary encoder externally attached to a wheel, to certainly acquire an encoder output signal obtained from a rotating shaft of a tire, by reducing an occurrence of a bending deformation or breakage of a unit component (e.g., shaft) occurred during a vehicle run and making the encoder function normally. A shaft, through which there is passed a cable for outputting a measurement result of the encoder whose rotating shaft is connected to the wheel, is arranged offset from the axle center by a predetermined amount and is held by a bracket attached to the vehicle, to be movable in the up and down direction. Alternatively, a holder for holding a stator of the encoder is attached to the body of the vehicle, by a rotary linkage mechanism to hold rotatably with five degrees of rotational freedom.