A distance detector comprising: a laser transmitter and receiver for generating a laser beam to irradiate an object and to receive return light reflected in response from the object, an image detection system for generating an image of a view, the image detection system including an objective lens for collecting light from the view, an image sensor for receiving light collected by the objective lens and for generating the image therefrom, and a digital display for displaying the image such that the digital display displays a real-time image of the view, a laser beam indicium on the digital display or a laser beam indicium generator configured to display laser beam indicium on the digital display, wherein the laser beam indicium indicates a direction of the laser beam, and a range-finding system for determining the distance to an object irradiated by the laser beam using return light and for displaying distance.

A digital fence of a work area is generated and loaded into a machine control system that controls an off-road machine. The machine control system detects whether the off-road machine is within a threshold distance of the digital fence and automatically controls operating parameters of the off-road machine when the off-road machine is within a threshold distance of the digital fence.

An optical detection device of detecting a distance relative to a target object includes a substrate, an optical sensor and a processor. The optical sensor is disposed on the substrate and adapted to capture an image about the target object. The processor is disposed on the substrate and electrically connected with the optical sensor. The processor is adapted to mark a first region and a second region within the image for acquiring first quantity of the first region and second quantity of the second region, and compare the first quantity with the second quantity for determining whether the distance is varied to a predefined condition.

A stand for a laser projection device is provided. The stand includes a mounting structure that couples to the laser projection device. In one embodiment the stand includes three legs that are coupled together at a junction, and a central column extends downward from the junction and the mounting structure is coupled to the mounting structure, thereby permitting the laser projection device to emit light towards a ground.

A monitoring device includes a progress execution unit that causes a combination of an irradiation unit and a light reception unit to progress inside a space that is tubular inside, the irradiation unit being for irradiating, with laser light, an exposed object that is an object exposed in the space of a tubular object being an object having the space, the light reception unit converting return light of the laser light from the exposed object into an electric signal; and a section specification unit that specifies, based on the electric signal, a predetermined-state section position being a position of a predetermined-state section that is, among sections of the exposed object that are irradiated with the laser light, the section indicating a predetermined state, and outputs the resultant.

The invention relates to a laser tracker-based surveying system having a measurement aid which comprises an inertial measurement unit (IMU). The surveying system is designed to determine coordinates of points of a surface which are sampled by means of the measurement aid.

A binocular telescope includes a pair of Schmidt-Pechan roof prisms, a second half pentaprism, a right-angle prism, a main circuit board, and an auxiliary circuit board. The second half pentaprism is connected to a first lateral surface of one of the first half pentaprisms. A second lateral surface of the second half pentaprism substantially faces the other first half pentaprism. The third lateral surface of the right-angle prism is connected to the second lateral surface of the second half pentaprism. A normal of the fourth lateral surface of the right-angle prism is perpendicular to an imaginary plane. The imaginary plane includes a normal of the first lateral surface and a normal of the second lateral surface. The light emitter and the light receiver on the auxiliary circuit board are arranged above the fourth lateral surface of the right-angle prism and electrically connected with the main circuit board respectively.

There is provided a laser alignment device (10) for use between a laser device (5) and a planar surface of an object e.g. wall (20) at which a laser beam (30) is to aim at right angles. The laser alignment device (10) includes a back member (12) for use against or parallel to the wall surface, which includes a back indicia (22). Also included is a front member (14) having a front indicia (16) on an imaginary plane shared with the back indicia (22) and perpendicular to the back member (12). The front indicia (16) is positioned for access by the laser beam (30) to reach the back indicia (22) when the laser beam (30) is aligned to aim at the wall surface at right angles.

Provided is an error prediction apparatus including at least one processor and at least one memory configured to receive environment data of a surveying site in which a surveying instrument is installed, to input the environment data of the surveying site into an error prediction model and predict a predicted error that occurs in a surveying result obtained by the surveying instrument under an environment of the surveying site, and to create display data for displaying the predicted error when the predicted error exceeds an allowable value. The error prediction model is a learned model created by machine learning for a surveying instrument of the same model as the surveying instrument by using a set of the environment data indicating an environment of the time of surveying and error data in a surveying result as teacher data.

Provided is an error prediction apparatus including at least one processor and at least one memory configured to receive environment data of a surveying site in which a surveying instrument is installed, to input the environment data of the surveying site into an error prediction model and predict a predicted error that occurs in a surveying result obtained by the surveying instrument under an environment of the surveying site, and to create display data for displaying the predicted error when the predicted error exceeds an allowable value. The error prediction model is a learned model created by machine learning for a surveying instrument of the same model as the surveying instrument by using a set of the environment data indicating an environment of the time of surveying and error data in a surveying result as teacher data.