초록 ▼

A first pattern which repeats change in the longitudinal direction with a predetermined pitch and a second pattern which changes in the longitudinal direction with a pitch which is different at least from that of the first pattern, both formed of a predetermined material, are disposed on a surface o

A first pattern which repeats change in the longitudinal direction with a predetermined pitch and a second pattern which changes in the longitudinal direction with a pitch which is different at least from that of the first pattern, both formed of a predetermined material, are disposed on a surface of a rod section. A detection head section is provided in proximity to the rod section, responds individually to the first pattern and the second pattern, changes its relation of correspondence to the respective patterns in accordance with its linear position with respect to the rod section and produces output signals in accordance with the relation of correspondence to the respective patterns. In accordance with the output signals corresponding to the respective patterns, first and second absolute position data of different ranges whose one cycle is constituted of one pitch of the respective patterns can be obtained. By combining these absolute position data, linear position of the detection head section with respect to the rod section can be specified in an absolute value. By disposing the first and second patterns in a mixed state on a single rod section, the construction of the device can be simplified.

대표청구항 ▼

An absolute position detection device comprising: a member having a first pattern which repeats change in the longitudinal direction of the member with a predetermined pitch and a second pattern which changes in the longitudinal direction of the member with a pitch which is different at least from t

An absolute position detection device comprising: a member having a first pattern which repeats change in the longitudinal direction of the member with a predetermined pitch and a second pattern which changes in the longitudinal direction of the member with a pitch which is different at least from that of the first pattern, these patterns being formed of a predetermined material and disposed on the member; and a detection head section provided in proximity to this member and responding individually to the first pattern and the second pattern on said member, said detection head section changing its relation of correspondence to the respective patterns in accordance with its linear position with respect to said member and producing output signals in accordance with the relation of correspondence to the respective patterns; wherein said first and second patterns are disposed independently along different channels provided on said member.