Abstract: A measuring system, comprising a surveying instrument for projecting a laser beam by rotary irradiation and a photodetection sensor device installed at a measuring point, wherein the surveying instrument comprises a first radio communication unit, the photodetection sensor device comprises a second radio communication unit, and communication can be performed between the surveying instrument and the photodetection sensor device, wherein the surveying instrument comprises an angle detecting means for detecting a horizontal angle in a projecting direction of the laser beam and a first arithmetic unit for controlling the angle detecting means based on a receiving signal from the first radio communication unit, and the photodetection sensor device comprises a photodetection unit for receiving the laser beam and a second arithmetic unit for performing transmission of a photodetection notifying signal to notify the receiving of the laser beam by the photodetection unit and also for performing transmission of a synch

Abstract: A surveying instrument for measuring three-dimensional position of a measured object, has a detecting section for detecting a direction of the measured object by rotational emission of two or more fan-shaped laser beams in which at least one beam is inclined; an optical system including a tracking-light-emitting section for emitting a tracking light and a distance-measuring-light-emitting section for emitting a distance-measuring light; a tracking-light-receiving section for receiving the tracking light reflected by the measured object; and a driving section for driving the optical system in order to collimate the measured object according to an output of the detecting section and an output of the tracking-light-receiving section.

Abstract: There are provided a rotary laser projecting device 1 and an object reflector 9, said rotary laser projecting device 1 comprises a reference plane forming unit 3 for forming a reference plane by projecting fan-shaped laser beams 5 which spread in vertical direction and have two or more laser beams including at least one thereof tilted, a distance measuring unit 4 for measuring distance by projecting distance measuring light 6, a rotator 10 for projecting said fan-shaped laser beams and said distance measuring light in horizontal direction by rotary irradiation, a horizontal angle detecting unit 21 for detecting horizontal angle of the rotator, a photodetection unit for receiving the reflected fan-shaped laser beams 5? and the reflected distance measuring light 6?, a storage unit 13, and a control arithmetic unit 12 for controlling said reference plane forming unit, said distance measuring unit and said rotator, and said object reflector 9 reflects said fan-shaped laser beams and said distance measuring light

Abstract: A measuring system, comprising a surveying instrument for projecting a laser beam by rotary irradiation and a photodetection sensor device installed at a measuring point, wherein the surveying instrument comprises a first radio communication unit, the photodetection sensor device comprises a second radio communication unit, and communication can be performed between the surveying instrument and the photodetection sensor device, wherein the surveying instrument comprises an angle detecting means for detecting a horizontal angle in a projecting direction of the laser beam and a first arithmetic unit for controlling the angle detecting means based on a receiving signal from the first radio communication unit, and the photodetection sensor device comprises a photodetection unit for receiving the laser beam and a second arithmetic unit for performing transmission of a photodetection notifying signal to notify the receiving of the laser beam by the photodetection unit and also for performing transmission of a synch