Sensing Method and Sensor System A sensing method comprises using a vertical cavity surface emitting laser (VCSEL) to oscillate and emit a laser beam. A diaphragm is used to reflect a portion of the laser beam back into the VCSEL. This method can be referred as self mixing interferometry. A current or voltage at the VCSEL is monitored, and is used to sense movement of the diaphragm. This allows a property external to the VCSEL to be sensed without using a photo-detector.

An example method includes receiving a 2D image of a 3D space from an optical camera, identifying, in the 2D image. A virtual image generated by an optical instrument refracting and/or reflecting the light is identified. The example method further includes identifying, in the 2D image, a first object depicting a subject disposed in the 3D space from a first direction extending from the optical camera to the subject and identifying, in the virtual image, a second object depicting the subject disposed in the 3D space from a second direction extending from the optical camera to the subject via the optical instrument, the second direction being different than the first direction. A 3D image depicting the subject based on the first object and the second object is generated. Alternatively, a location of the subject in the 3D space is determined based on the first object and the second object.

An optoelectronic sensor for determining the distance of an object in a monitoring area has a light transmitter for transmitting transmitted light, a light receiver for generating a received signal from remitted light remitted by the object, and a control and evaluation unit configured to modulate the transmitted light with at least a first frequency and a second frequency, to determine a phase offset between transmitted light and remitted light for the first frequency and the second frequency, and to determine a light time of flight. The control and evaluation unit is configured to determine a first amplitude and a second amplitude for the first frequency and the second frequency from the received signal and to detect whether the transmitted light impinges on an edge in the monitoring area on the basis of an evaluation of the first amplitude and the second amplitude.

A first light source outputs measurement light having a wavelength in infrared range. A second light source outputs guide light having a wavelength in visible range. A fiber coupler includes a first port into which the measurement light is input, a second port into which the guide light is input, and a third port outputting combined light formed by combining the measurement light and the guide light with each other. A measurement unit emits the combined light to a measurement object and receives return light reflected therefrom. A processing unit obtains information relating to a distance, a speed, or an oscillation of the measurement object, based on an interference signal of the return light and the reference light. The fiber coupler is formed by a single mode fiber that has a cutoff wavelength that is shorter than that of the measurement light and longer than that of the guide light.

An ECU device which estimates a length of a lower limb of a seated person who is seated in a vehicle seat is shown. The ECU device includes the following. A thigh angle information obtainer obtains information regarding a thigh angle of the seated person. A back knee angle information obtainer obtains information regarding a back knee angle of the seated person. An estimator estimates the length of the lower limb of the seated person based on the information regarding the thigh angle obtained by the thigh angle information obtainer and information regarding the back knee angle obtained by the back knee angle information obtainer.

A measurement device is configured to: calculate first contour data of a container in an empty state at a first time; calculate second contour data indicating a surface contour of an object at a second time in execution of a scooping operation by the container; rotate the second contour data, based on differential information indicating a difference between second posture data of a working gear 4 at the second time and first posture data of the working gear 4 at the first time; specify a region defined by supplemental contour data for supplementing the surface contour of the object contained in the container in the execution of the scooping operation, the rotated second contour data, and the first contour data; and calculate, based on the specified region, a first volume indicating a volume of the object contained in the container.

An object is to provide an image display device capable of correcting a position in a simple manner even when a deviation occurs in position alignment in accordance with movement of a user. The image display device 100 includes a correction processing unit 102 that corrects a deviation when the deviation occurs between image data G and a steel frame T in a field of vision of a user U that occurs in accordance with movement of the user. This correction processing unit 102 acquires a coordinates correction position S that becomes a reference position used for a correction process from the steel frame T1 or the like that is a partial member using design data stored by a storage unit 103 and a self-position of the user U with respect to the steel frame T. The correction processing unit 102 performs correction by performing position alignment of the image data G on the basis of the one coordinates correction position S.

A measurement system for frames of heavy duty trucks and trailers does not require a dimensional reference database. A plurality of electronic targets are attached to selected target points on the frame. A position of the laser scanner from the selected target points is determined. Measurement data for additional targets is determined. The frame dimensions are then analyzed for defects that are greater than a pre-set tolerance. Measurements outside of a tolerance range can be flagged with contrasting color. The results of the frame analysis are shown on the user's screen, on the electronic target, and can be printed out or emailed for future inspection. The frame can be repaired while the targets and laser scanner are still deployed so that the measurement system can continue to display the status of the measurement points in real time and the success of the repairs can be confirmed.

The distance image acquisition apparatus (10) includes a projection unit (12) which projects a first pattern of structured light distributed in a two-dimensional manner with respect to a subject within a distance measurement region, a light modulation unit (22) which spatially modulates the first pattern projected from the projection unit (12), an imaging unit (14) which is provided in parallel with and apart from the projection unit (12) by a baseline length, and captures an image including the first pattern reflected from the subject within the distance measurement region, a pattern extraction unit (20A) which extracts the first pattern spatially modulated by the light modulation unit (22) from the image captured by the imaging unit (14), and a distance image acquisition unit (20B) which acquires a distance image indicating a distance of the subject within the distance measurement region based on the first pattern.

The present document discloses a method of determining thickness of a wet film, in particular of microfibrillated cellulose. The method comprises conveying said film (20) in a wet state on a conveyor (10) having a conveyor width, the wet film having a film width which is less than the conveyor width, providing a laser projection (1511) across a film edge, acquiring a series of images, each depicting an area of the conveyor, wherein the laser projection, a portion of the film and a portion of an exposed conveyor surface are visible, and using at least some of said images to determine at least one of a film thickness and a film thickness distribution across the film width. The document also discloses a method of forming a film, in particular a microfibrillated cellulose film, and a device for producing such film.