Current GNSS-inclinable surveying pole systems rely on magnetometer sensors. The use of these types of sensor implies performance degradation when operating near magnetic fields. The invention provides a new approach to ranging pole systems, able to provide requested performance even when working near magnetic fields.

Current GNSS-inclinable surveying pole systems rely on magnetometer sensors. The use of these types of sensor implies performance degradation when operating near magnetic fields. The invention provides a new approach to ranging pole systems, able to provide requested performance even when working near magnetic fields.

A plumb-bob device has an enclosure with three lasers projecting from one end, one of which projects a horizontal lane, one in a vertical plane, and one with crossed planes from a laser that is suspended to swing but not rotate about an axis. The device may be attached to an object to be leveled or plumbed, and moving the object until the lasers coincide accomplishes plumbing the object.

An object is to provide a surveying instrument and system to manage instrument setting and usage data for each personal user. The surveying instrument includes a personal authentication sensor, a control unit, and a storage unit. A personal information registration unit of the control unit acquires personal authentication information from the sensor and stores the personal authentication information in a personal identification information database of the storage unit in association with user information. A personal authentication execution unit of the control unit identifies a user based on whether authentication data acquired by the sensor matches personal authentication information stored in the personal identification information database. A personal setting application unit of the control unit refers to a personal setting information database in the storage unit, and when finding instrument setting saved by the authenticated user, applies the instrument setting and starts the surveying instrument.

An object is to provide a surveying instrument and system to manage instrument setting and usage data for each personal user. The surveying instrument includes a personal authentication sensor, a control unit, and a storage unit. A personal information registration unit of the control unit acquires personal authentication information from the sensor and stores the personal authentication information in a personal identification information database of the storage unit in association with user information. A personal authentication execution unit of the control unit identifies a user based on whether authentication data acquired by the sensor matches personal authentication information stored in the personal identification information database. A personal setting application unit of the control unit refers to a personal setting information database in the storage unit, and when finding instrument setting saved by the authenticated user, applies the instrument setting and starts the surveying instrument.

Method for comparing a received beam (24) incident on a laser receiver (12) in a longitudinal arrangement with a rotating laser beam (22), which is moved by a rotating laser (11) in a horizontal position about an axis of rotation (21), wherein the laser receiver (12) comprises an evaluation unit and at least one detection field (25) having a longitudinal direction (28) and a transverse direction (29). The rotating laser (11) is arranged on a tripod (14) adjustable along an axis (15) and the horizontal laser plane that the rotating laser beam (22) produces is moved by the tripod (14) in a height direction (16) along the axis (15). In the longitudinal direction (28) of the detection field (25), the evaluation unit determines an adjustment direction of the received beam (24) relative to the laser receiver (12), and the evaluation unit compares the adjustment direction of the received beam (24) with the height direction (16) of the tripod (14).

Method for comparing a received beam (24) incident on a laser receiver (12) in a longitudinal arrangement with a rotating laser beam (22), which is moved by a rotating laser (11) in a horizontal position about an axis of rotation (21), wherein the laser receiver (12) comprises an evaluation unit and at least one detection field (25) having a longitudinal direction (28) and a transverse direction (29). The rotating laser (11) is arranged on a tripod (14) adjustable along an axis (15) and the horizontal laser plane that the rotating laser beam (22) produces is moved by the tripod (14) in a height direction (16) along the axis (15). In the longitudinal direction (28) of the detection field (25), the evaluation unit determines an adjustment direction of the received beam (24) relative to the laser receiver (12), and the evaluation unit compares the adjustment direction of the received beam (24) with the height direction (16) of the tripod (14).

A level instrument for surveying a mining subsidence zone in a coal mining area includes a bottom plate, a leveling mechanism, a lifting mechanism, and a level instrument body, where the leveling mechanism is provided on the bottom plate, the lifting mechanism is provided on the leveling mechanism, and the level instrument body is provided on the lifting mechanism. A surveying method using the level instrument is further provided. The level instrument is placed at a surveying location through the bottom plate, a levelness of the level instrument body is directly adjusted through the leveling mechanism below the level instrument body, and a height of the level instrument body is directly adjusted through the lifting mechanism. In this way, the operation process of the level instrument is simplified, and the overall surveying efficiency is improved.

A level instrument for surveying a mining subsidence zone in a coal mining area includes a bottom plate, a leveling mechanism, a lifting mechanism, and a level instrument body, where the leveling mechanism is provided on the bottom plate, the lifting mechanism is provided on the leveling mechanism, and the level instrument body is provided on the lifting mechanism. A surveying method using the level instrument is further provided. The level instrument is placed at a surveying location through the bottom plate, a levelness of the level instrument body is directly adjusted through the leveling mechanism below the level instrument body, and a height of the level instrument body is directly adjusted through the lifting mechanism. In this way, the operation process of the level instrument is simplified, and the overall surveying efficiency is improved.

A laser measuring device for a pipe fitting including a framing square having a first arm and a second arm attached to the first arm. Each of a pair of laser housing units is disposed on a top surface of the first arm of the framing square. Each of the pair of laser housing units has a central processing unit, a display screen, an activation control disposed proximal the display screen, and a laser directed outward toward the second arm of the framing square. A lever is slidably disposed on the framing square. The central processing unit of each of the upper laser housing unit and the lower laser housing unit is configured to calculate a distance of the laser of each of the upper laser housing unit and the lower laser housing unit, respectively, from a pipe when the framing square is disposed immediately adjacent to a pipe fitting.