A camera device includes an inclination sensor that is configured to repeatedly detect an inclination of a camera housing, a memory that stores, as an initial value, a detection value of the inclination at the time of installation of the camera housing, a plurality of light emitting elements that is provided on a front surface of the camera housing, and a processor that is configured to control driving of the plurality of light emitting elements. The processor is configured to drive and control the plurality of light emitting elements in different light emission patterns according to a difference between the detection value of the inclination of the camera housing and the initial value.

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.

Disclosed is a multifunctional level gauge for applying a nano adhesive tape for convenient and quick positioning. The multifunctional level gauge comprises a level ruler (1) with a hollow profile, wherein a transverse level (2) and a vertical level (3) are respectively arranged on the level ruler (1), at least two nano adhesive tapes (4) for convenient and quick positioning are pasted and fixed to a left side surface of the level ruler (1), and an adhesive tape positioning structure is arranged below the nano adhesive tapes (4); and an angle measurement device (5) capable of performing 360-degree omnidirectional measurement and a swing-type offset measurement structure for cooperatively observing whether an intersection plane is inclined are arranged at an upper end portion of the level ruler (1), and the swing-type offset measurement structure comprises a swing connection rod (6), a counterweight cone (7) and an alignment pointer (8). On the basis of achieving 360-degree omnidirectional angle measurement, horizontal measurement, vertical measurement, and plane measurement can be achieved at the same time; during measurement, whether a measurement plane is inclined can be determined by observing whether the counterweight cone (7) coincides with the alignment pointer (8); and the multifunctional level gauge can be directly pasted to the measurement plane, the level gauge can be conveniently placed by a worker, the working efficiency is improved, and the measuring effect is good.

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.

A device for detecting a steering wheel position, the steering wheel angle and/or the inclination of the steering wheel (304) of a vehicle is disclosed. The device includes at least two cameras (5, 6; 202, 203) by means of which the steering wheel (304) can be sensed (8, 9; 204, 205). At least three reference objects (301, 302, 303) are provided which can be releasably fastened to the steering wheel (304).

A device, a system and a method of growing a virtual plant are provided. The device includes an acquisition module, configured to acquire control information; and a holographic image display module, configured to project and display a holographic image, and change a currently displayed holographic image according to the acquired control information, wherein the currently displayed holographic image includes a holographic image of a plant in a current growth stage when a user performs a planting operation including at least one of sowing the plant or maintaining the plant.

A method for visualizing an inclination of a motor vehicle in the motor vehicle, in which the inclination of the motor vehicle is measured and made visible in the interior of the motor vehicle. The inclination is made visible by interior lighting of the motor vehicle. At least one virtual plane is formed, which intersects the motor vehicle horizontally when the latter is in a horizontal position and serves as a reference plane for displaying the inclination. Changes in the inclination of the motor vehicle are modeled dynamically by the interior lighting by the sequential and/or parallel activation of illuminants of the interior lighting.

A combined square leveling for combing multiple construction tools into a single device includes a framer's square for measuring angles during construction. A tape measure is retractably positioned within the framer's square and the tape measure is urgeable outwardly from the framer's square for measuring distance. The tape measure is biased to retract into the framer's square. A bubble level is coupled to the framer's square to determine if a surface is level. A laser level is slidably coupled to the framer's square to emit a beam of light to establish a reference point on a distal object.

A combined square leveling for combing multiple construction tools into a single device includes a framer's square for measuring angles during construction. A tape measure is retractably positioned within the framer's square and the tape measure is urgeable outwardly from the framer's square for measuring distance. The tape measure is biased to retract into the framer's square. A bubble level is coupled to the framer's square to determine if a surface is level. A laser level is slidably coupled to the framer's square to emit a beam of light to establish a reference point on a distal object.

A device for detecting a steering wheel position, the steering wheel angle and/or the inclination of the steering wheel (304) of a vehicle is disclosed. The device includes at least two cameras (5, 6; 202, 203) by means of which the steering wheel (304) can be sensed (8, 9; 204, 205). At least three reference objects (301, 302, 303) are provided which can be releasably fastened to the steering wheel (304).