Sokkia Topcon Co., Ltd.

Kabushiki Kaisha Topcon

Topcon Corporation

Masaru Muraki

Homare Momiyama

Kaoru Kumagai

Minoru Chiba

A controller () of a surveying instrument including a GPS receiver () and a transmitter and receiver section () for communicating with a prism device including a GPS receiver (), an atmospheric pressure sensor (), a temperature sensor (), and a transmitter and receiver section () for communicating with the surveying instrument calculates an azimuth angle of the prism device when viewed from the surveying instrument and a distance therebetween from positions of the prism device and surveying instrument obtained from the GPS receivers, further calculates an elevation angle of the prism device when viewed from the surveying instrument from the distance and atmospheric pressures at the positions of the prism device and surveying instrument, and issues a rotation command to a horizontal drive section () and a vertical drive section (), so that a collimating telescope can be immediately and automatically directed toward a reflecting prism for measurement.

Surveying system

A surveying instrument includes a pedestal provided with a guide light irradiation unit provided with a light source to irradiate with guide light indicating a collimation direction of the surveying instrument to an operator, a tracking optical system which locks a target, a ranging optical system which ranges a distance to the target, and a control circuit which calculates surveying data by a ranging result of the ranging optical system, and a transmitting and receiving unit which receives survey setting point data regarding a survey setting operation and sends the surveying data obtained by the control circuit.

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Tokyo, Japan

Masaru Muraki