An automatic leveling system includes a platform, a leveling device provided on the platform, a loading tray provided on the leveling device, three reflecting devices provided on the loading tray, an image acquisition device provided above the loading tray, a height positioning device provided on an end of the image acquisition device facing the loading tray, a light source configured to emit light, and a controller coupled to the image acquisition device. The height positioning device processes light emitted by the light source into three paths of light to the three reflecting devices. The three reflecting devices reflect the three paths of light. The image acquisition device acquires the three paths of reflected light into a light signal. The controller detects deflection values of the loading tray according to the light signal and controls the leveling device to level the loading tray.

An imaging apparatus that is mounted on a vehicle that runs on a road surface includes: a light source that emits illumination light which is infrared light; a solid-state imaging device that images a subject and outputs an imaging signal indicating a light exposure amount; and a computator that computes subject information regarding the subject by using the imaging signal. The solid-state imaging device includes: first pixels that image the subject by receiving reflected light that is the illumination light reflected off the subject; and second pixels that image the subject by receiving visible light. Information indicated by an imaging signal outputted from the first pixels is information regarding a slope of the road surface, and information indicated by an imaging signal outputted from the second pixels is information regarding an appearance of the road surface.

Proposed is a method of measuring the slope of a drainpipe while moving through the drainpipe. The method includes following steps: a) continuously measuring a slope of a pipe using a slope sensor disposed in a vehicle when the vehicle moves; b) measuring distances to a ceiling of the pipe in real time through non-contact sensors disposed at four positions, that is, at both sides of front and rear portions the vehicle, the step b) being performed simultaneously with the step a); and c) calculating slope differences, which are the degrees of inclination to the front, rear, left, and right using trigonometry and then correcting the slope by reflecting the slope differences to the slope measured in the step a), when there are differences in the distances measured in step b).

A tool, such as a digital level, includes displays on top and side surfaces of the level. The top surface display provides an additional visual means to communicate the orientation of the level by emitting any of several visual signals. A processor in the level determines a measured orientation of the level and sends a communication signal to the top surface display to emit a selected visual signal based on the measured orientation.

An optical fiber inclination measurement apparatus and a differential inclination measurement system are provided, which is related to the field of monitoring technology. The apparatus includes a supporting mechanism with a base and a base frame, a swinging mechanism with a pendulum, a cycloid, and a first reflective film is disposed on the pendulum. The measurement mechanism includes a first optical fiber, and an end surface of the first optical fiber is disposed opposite to the first reflective film. During an earthquake generating process, a landform changes and the pendulum swings, resulting in changes in displacement. The end surface of the first optical fiber together with the first reflective film form a Fabry-Perot cavity. The cavity length of the Fabry-Perot cavity changes before and after the landform deforms, and an angle of inclination is equal to a value obtained by dividing the cavity length variation of the Fabry-Perot cavity by the pendulum length.

A tilt analysis system including: a surveying device configured to survey a position of a survey target device by irradiating the survey target device with surveying light, the survey target device including an attachment portion to be attached to a columnar object, and a reflector that reflects the surveying light; a portable terminal device; a reference value acquisition unit configured to acquire a first point obtained by surveying the position of the survey target device attached to a bottom of the columnar object; a column top value acquisition unit configured to acquire a second point obtained by surveying the position of the survey target device attached to the top of the columnar object; a tilt analysis unit configured to generate tilt information indicating in which direction the columnar object tilts; and a tilt information output unit configured to output the tilt information generated by the tilt analysis unit.

Technique for performing camera calibration on a vehicle is disclosed. A method of performing camera calibration includes emitting, by a laser emitter located on a vehicle and pointed towards a road, a first laser pulse group towards a first location on a road and a second laser pulse group towards a second location on the road, where each laser pulse group includes one or more laser spots. For each laser pulse group: a first set of distances are calculated from a location of a laser receiver to the one or more laser spots, and a second set of distances are determined from an image obtained from a camera, where the second set of distances are from a location of the camera to the one or more laser spots. The method also includes determining two camera calibration parameters of the camera by solving two equations.

The present disclosure relates to a laser level system. The laser level system includes a mount, a laser secured to the mount and a remove input device. The mount includes a rotating portion to which the laser level is secured. The remote input device controls rotation of the rotating portion. The laser level is secured to the rotating portion of the mount such that when the rotating portion rotates, the laser level rotates concurrently along with the rotating portion of the mount.

A fastener comprises a body part, fastening means for fixing the fastener to a first object, a mounting part for mounting a second object to the fastener, and connecting means connecting the body part and the mounting part. The mounting part is rotatable and pivotable relative to the body part so as to assume a predetermined orientation relative to the body part, and the body part is retractable from the mounting part. The fastener is adjustable between at least two operational states, a first operational state, in which the body part and the mounting part are adjacent to each other, or a second operational state, in which the body part is retracted from the mounting part so that the body part and the mounting part are spaced apart from each other. In the first operational state, the predetermined orientation of the mounting part relative to the body part is fixed, and in the second operational state, the predetermined orientation of the mounting part relative to the body part is adjustable by rotating and/or pivoting the mounting part.

A level, such as a digital level, with various features or embodiments, such as an ultrasonically welded lens covering a display screen, a pipe insert molded in front of a light sensor, one or more button assemblies, and cartridge assemblies that are used to secure compartments within the frame of a level.