Abstract: A heat exchanger, providing indirect heat transfer between a first fluid and at least one second fluid, comprises a jacket enclosing a jacket space for accommodating the first fluid and a tube bundle arranged in the jacket space and having a plurality of tubes for accommodating the at least one second fluid. The tubes form multiple tube layers. A shroud arranged in the jacket space encloses an outermost tube layer of the tube bundle. Spacers extending along the longitudinal axis are arranged between the shroud and the outermost tube layer. An interspace is present between any two spacers adjacent in the circumferential direction of the shroud, and between the shroud and the uppermost tube layer. A flow obstruction is arranged in the respective interspace and is designed to prevent or suppress a flow of the first fluid in the respective interspace, at least over a part section thereof.

Abstract: A tube bundle heat exchanger has tubes which are held at each side in tube plates or oval-tube collecting-tube plates and are connected to these in each case by means of a weld seam. The connection of the tubes to the inlet-side tube plate or oval-tube collecting-tube plate is formed in each case by means of a conical and/or trumpet-shaped transition piece. The cross section of the transition piece reduces as viewed in the gas flow direction in such a way that the inlet-side end, as viewed in the gas flow direction, of the transition piece is connected in a buttjoint to the tube plate or oval-tube collecting-tube plate. The inner and outer contours of the transition piece and of the welded connection region are formed without gaps and comers to the tube plate or oval tube collecting-tube plate and so as to be straight and/or with a radius, measured from the outer contour, of at least 5 mm.

Abstract: This flat tube heat exchanger encompasses a closed housing, in which two tube sheets and a tube bundle, which is arranged between the tube sheets and which is supported by the tube sheets is arranged. The tube bundle comprises at least some flat tubes, which extend in longitudinal direction of the tube bundle. At their ends, the flat tubes are round and are flat in a central section. The ends of the flat tubes, which have a round cross section, can be circular or can encompass a different round shape.

Abstract: A window assembly heat transfer system is disclosed in which a window member has a selected transparency to monitored or sensed light wavelengths. One or more passages are provided in the window member for flowing a single-phase or two-phase heat transfer fluid, the passages being optically non-transparent to the monitored or sensed light wavelengths. A mechanism allows either evaporation or condensation of the fluid and/or balancing of a flow of the fluid within the passages. In one embodiment, the window assembly can be made by producing passages in a top surface of a first single plate, optionally producing passages in a bottom surface of a second single plate and bonding the top surface of the first plate to a bottom surface of a second single plate to form the window member with the passage or passages. In another embodiment, the window assembly can be made by providing a core around which the window member material is grown and thereafter removing the core to produce the passage or passages.

Abstract: The invention relates to a heat exchanger comprising: at least one row of tubes (2), at least one fin (4) disposed transversely to said row of tubes (2), the tubes being connected to the fin (4) by clamping the tubes (2) in a collar (6) formed in the fin (4); and at least one row (10) of louvers (12), said row (10) being formed in the fin (4) and interposed between two tubes (2) in the row of tubes. With the fin (4) having a flat rectangular overall shape, the ratio between the number of louvers (12) and the width of the fin (4) is between 0.73 and 1.13.

Abstract: The present invention relates to a heat-sink base provided with heat-sink fin portions, it manufacturing method and a motor provided with the heat-sink base. The base is produced by pouring cast metal into a mold cavity to replace a pattern having a predetermined sublimation temperature. The base includes a preformed heat-sink member comprising a plurality of heat-sink fin portions and at least one anchor portion embedded at least partially in the pattern, and a base body comprising an enclosed base portion and a holder portion for receiving and holding the at least one anchor portion. By virtue of the invented method, the heat-sink member having an extremely thin thickness can be mounted on the base body and the overall surface area of the heat-sink base is increased considerably.

Abstract: A curved plate heat exchanger includes a heat exchange unit in which heat medium flow paths and combustion gas flow paths are alternately formed to be adjacent to each other in spaces between a plurality of plates, wherein the plurality of plates are configured in such a manner whereby a plurality of unit plates, in which first and second plates are stacked, are formed; wherein the heat medium flow paths are formed between the first plate and the second plate of the unit plate; and wherein the combustion gas flow paths are formed at constant interval between the second plate of the unit plate located on one side of the adjacent unit plates and the first plate of the unit plate located on the other side.

Abstract: A plate for a heat exchanger includes a substantially planar body having a first end, a second end opposing the first end, a fluid surface, and an outer surface. A first cup extends from the outer surface of the body adjacent the first end of the body. A second cup extends from the outer surface of the body and is spaced from the second end of the body.

Abstract: Systems according to the present disclosure provide one or more surfaces that function as power radiating surfaces for which at least a portion of the radiating surface includes or is composed of “fractal cells” placed sufficiently closed close together to one another so that a surface wave causes near replication of current present in one fractal cell in an adjacent fractal cell. The fractal cells may lie on a flat or curved sheet or layer and be composed in layers for wide bandwidth or multibandwidth transmission. The area of a surface and its number of fractals determines the gain relative to a single fractal cell. The boundary edges of the surface may be terminated resistively so as to not degrade the cell performance at the edges. Fractal plasmonic surface cards are described.

Abstract: A one-piece heat exchanger manufactured using an additive manufacturing process is described. The heat exchanger includes a plurality of channels formed therein. At least some of the plurality of channels may be configured to provide structural support to the heat exchanger to reduce its weight. Different coolant media may be used in a first set and a second set of the plurality of channels to provide different types of cooling in an integrated one-piece heat exchanger structure.

Abstract: A heat exchanger may include a plurality of pipe bodies arranged between two side parts. At least one side part may have at least one predetermined breaking point and at least one heat expansion compensator. The at least one side part may include at least one aperture, which may lead from the at least one predetermined breaking point to the at least one heat expansion compensator.

Abstract: An environmental control system according to an example of the present disclosure includes a heat exchanger, a ram air duct operable to provide cooling ram air to the heat exchanger, and a water extractor operable to extract water from a bleed air stream. The heat exchanger includes at least one nozzle operable to spray water from the water extractor into the ram air duct. An example heat exchanger and a method of making a heat exchanger are also disclosed.

Abstract: A heat dissipation retaining structure for a heat production device, an installation method thereof, and a wind turbine generator set. The heat dissipation retaining structure includes a retaining structure body for defining a middle space, and a thermal radiation absorption coating, a heat insulating material, or an infrared low-emissivity and high-reflectivity material is at least partially applied to an inner wall of the retaining structure body. The air temperature of the environment in the retaining structure is actively decreased by the foregoing structure under the conditions that noise is avoided, environmental friendliness is achieved, external power is omitted, and energy consumption is zero, thereby decreasing the temperature of the heat production device, and ensuring that the heat production device works at the allowable normal temperature for a long time.

Abstract: A heat sink includes an extruded component, a cast component, and an interface layer. The extruded component includes a first aluminum material and is configured to be coupled to a solid state light source. The cast component includes a second aluminum material overmolded onto a portion of the extruded component to form the interface layer. The interface layer is formed of at least one of the first and the second aluminum materials and abuts against and couples the extruded component to the cast component.

Abstract: A water cooling system includes a temperature control device which is connected with a first heat exchanger. A second heat exchanger includes a water temperature control path and a constant temperature water path. The water of the first heat exchanger is controlled by the temperature control device and flows to the water temperature control path. The water in the constant temperature water path tows through the second heat exchanger to proceed heat exchange with the water in the water temperature control path, and then flows to the target equipment. The temperature difference of the water flowing to the target equipment is smaller than that of conventional water cooling system.

Abstract: A loader system may include a loader including at least two pistons, each piston being translatable along a respective translation path and comprising a respective engagement surface for engaging a cartridge when translated along its respective translation path to thereby cooperatively urge the cartridge into a magazine such that the cartridge is loaded within the magazine and retained therein by feed lips of the magazine.

Abstract: A magazine is provided for a firearm. The magazine comprises a locking mechanism. The locking mechanism has a user interface adapted to enable a user to select between a locked condition and an unlocked condition. The locking mechanism has a rotor movable between a first rotational position when the locking mechanism is in the locked condition and a second rotational position when the locking mechanism is in the unlocked condition. The magazine comprises an elongated shaft connected to the rotor. The magazine comprises a block element connected to the elongated shaft. The block element is adapted to move between a first position when the locking mechanism is in the locked condition in which at least one of firearm operation and magazine extraction are prevented, and a second position when the locking mechanism is in the unlocked condition in which firearm operation and magazine extraction are enabled.

Abstract: A magazine is provided for a firearm. The magazine comprises a locking mechanism. The locking mechanism has a user interface adapted to enable a user to select between a locked condition and an unlocked condition. The locking mechanism has a rotor movable between a first rotational position when the locking mechanism is in the locked condition and a second rotational position when the locking mechanism is in the unlocked condition. The magazine comprises an elongated shaft connected to the rotor. The magazine comprises a block element connected to the elongated shaft. The block element is adapted to move between a first position when the locking mechanism is in the locked condition in which at least one of firearm operation and magazine extraction are prevented, and a second position when the locking mechanism is in the unlocked condition in which firearm operation and magazine extraction are enabled.

Abstract: A control mechanism of a vehicle-mounted system for electromagnetic launch of fire extinguishing bombs for high-rise buildings is provided. A stress wave amplifier is fixedly connected to a secondary coil, a primary coil is fixedly connected to a coil base, a guide shaft passes through a central hole in the primary coil and the coil base, and a head of the guide shaft is fixedly connected to the secondary coil. A step-up transformer TM1 boosts a 380-V alternating current and changes it to direct current to charge a pulse capacitor C1 and store energy in the pulse capacitor C1. A discharge thyristor M3 is triggered, and the pulse capacitor C1 releases the energy instantaneously. A stress wave is generated between the primary coil and the secondary coil. The stress wave is transmitted to a fire extinguishing bomb through the stress wave amplifier, to launch the fire extinguishing bomb.

Abstract: A compressed gas gun including a housing and a bolt movable within a passage in the housing. Movement of the bolt relative to the housing opens a flow path for firing a projectile.

Abstract: Disclosed herein is a pneumatic ball launcher for facilitating launching of a ball. Accordingly, the pneumatic ball launcher may include an air chamber, a fill assembly, an air blast valve, a trigger assembly, and a parabolic curved barrel. Further, the air chamber may be configured for receiving at least one gas. Further, the air chamber may be configured for storing the at least one gas at a gas pressure based on the receiving. Further, the fill assembly may be fluidly coupled with the air chamber. Further, the fill assembly facilitates transferring of the at least one gas into the air chamber. Further, the air blast valve may be fluidly coupled to the air chamber. Further, the trigger assembly may be operationally coupled with the air blast valve. Further, the parabolic curved barrel may be coupled to the air blast valve using a locking breech assembly.

Abstract: A structure includes a bolt body combined in a toy gun, a bullet feeding element, a high pressure air opening, an air outlet opening, an air valve assembly, a piston element, a recoil bar at one side of the bolt body, a first elastic element fit over the recoil bar, a bolt sleeve defined at one side of the bolt body and movably fit over the recoil bar, and an abutting section. When the high pressure air is input through the high pressure air opening, the air valve assembly may change a flowing direction thereof and drive the abutting section to move so as to control rearward movement of the piston element, the bolt body, and the bullet feeding element. A first elastic element that is operable to move the bolt body forward is disposed on the recoil bar outside the bolt body.

Abstract: A power system for a firearm includes a buffer tube adapter that attaches to a buffer tube of the firearm. A buttstock slidably engages with the buffer tube adapter along an axis, and the buttstock is adapted to adjust a length of the firearm. A power source is held by the buffer tube adapter and is at least partially covered by the buttstock. The power source is configured to power electronic accessories mounted to the firearm. The power system is mountable to the firearm without altering the buffer tube of the firearm.

Abstract: A cell phone mount for bug killing guns includes a cell phone clamping portion and a bug gun rail attaching portion. The clamping portion has retaining jaws urged together to hold edges of a cell phone. The attaching portion has a base, a cover, attaching claws and a cam lock. The attaching claws move laterally and vertically to attach to a top rail of the gun. The cam lock has a rotating portion with a vertical shaft, is rotatably mounted to the base and engages the attaching claws. The cam lock has a lever with attached rotary cam. The cam is mounted to the vertical shaft and bears on the cover. When the lever is rotated, the attaching claws move laterally and when the lever is moved vertically, the rotary cam move the attaching claws vertically, attaching the cell phone mount to the top rail of the bug killing gun.

Abstract: A holster accessory apparatus that is configures to modify existing holsters to allow for more comfortable carrying of a gun with an exposed grip. The accessory comprises two elements, a flexible material larger than the perimeter of a combination of a gun holster and an attaching element configures to affix the holster to the flexible material. In one embodiment, method is designed for conceal and carry situations.

Abstract: An ejector system for ejecting/separating a store, such as a weapon, from a launch platform includes a pair of spring assemblies that each include nested springs that are contained in a housing when the spring assemblies are in a compressed configuration. To separate the store from the aircraft the spring assemblies each move from the initial compressed configuration to an extended configuration, using the potential energy stored in the springs when compressed. The extension of the springs extends the springs mostly out of the spring assembly housings, extending telescoped sleeves of the spring assemblies. The extension of the spring assemblies provides a safe and steady way of separating the store from the launch platform, while having the advantages of being reusable, low cost and low weight, not producing any debris, and providing a softer push than may be produced by other separation mechanisms, such as the use of pyrotechnic devices.

Abstract: Implementations of a flashlight mount are provided. The flashlight mount is configured to position a flashlight on a handguard of a firearm and includes a trigger mechanism configured to actuate a push-button tailcap switch of the flashlight. In a preferred implementation, a flashlight mount comprises: a base that can be secured to a handguard of a firearm; a flashlight mounting ring configured to releasably hold a flashlight; and a trigger mechanism, the trigger mechanism comprises a bifurcated trigger configured to actuate a push-button tailcap switch of the flashlight when pressed forward. In some implementations, the bifurcated trigger comprises two contact members that extend upwardly and outwardly from a body thereof, thereby positioning each contact member on an opposite side of the handguard. In this way, the trigger mechanism of the flashlight mount is configured to facilitate ambidextrous operation of the flashlight.

Abstract: A level indicator system for an aiming system comprising a base assembly, a level assembly. The base assembly comprises a base member defining a base axis, a plate, and a support member. The level assembly comprises a level indicator defining a level axis. The base member and the plate support the support member such that a location of the plate relative to the base member is adjustable. The support member supports the level assembly such that a location of the level axis relative to the base axis is altered when a location of the plate relative to the base member is adjusted.

Abstract: The invention is a device for supporting a firearm. The device comprises a body, a gripping arrangement, a fixing arrangement for the gripping arrangement and a holding arrangement for fixing the body onto the scope rail of the firearm. The body has an upper surface and a bottom surface and a first side and a second side, and on the bottom surface is a rail channel. The walls of the rail channel are configured in such a way that at least part of the scope rail can be fitted into the rail channel, and the fixing arrangement for the gripping arrangement is configured to fix the gripping arrangement into a first position where the gripping arrangement extend from the first side of the body. The first end of the gripping arrangement is configured to grip a surface when supporting the firearm.

Abstract: Provided is an active camouflage device including a reflective layer, a first electrode disposed on the reflective layer, a second electrode facing the first electrode, and an electrolyte provided between the first and second electrodes. The first electrode includes a transparent electrode, and the second electrode includes a metal mesh.

Abstract: A mounting and fastening system clamp has an inboard-outboard axis, and includes a clamp inboard surface extending transversely with respect to the axis; a clamp outboard surface extending transversely with respect to the axis; a clamp outward surface extending between the inboard and outboard surfaces; a tapered inward surface extending between the inboard and outboard surfaces and tapering in an axially inboard and radially inward direction; and a rail mating inward surface extending between the inboard and outboard surfaces.

Abstract: A process for managing a formation of intelligent electronically-embedded intelligent shields includes first receiving, from a plurality of primary officer and intelligent shield pairs, first location information and pressure information measured at a pressure sensor coupled to the intelligent shield and indicative of a pressure being applied to a front and/or rear face of the intelligent shield. The received pressure information is then compared to a threshold pressure value to identify those shields exceeding the threshold. Then a particular secondary support officer is identified for aiding the particular primary officer, after which either a redeployment message is transmitted to the particular secondary support officer or an indication instruction is transmitted to the intelligent shield in the particular primary officer and intelligent shield pair.

Abstract: The present invention provides a subsonic ammunition including a polymeric casing body; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer and diffuser disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.

Abstract: The embodiments disclosed include a system comprising a missile segment having a hollow body with an external surface conforming to an external surface of a portion of a missile body. The missile segment comprises a plurality of slot thrust motor (STM) cavities arranged in the hollow body. Each STM cavity being elongated in a first direction relative to a longitudinal axis of the missile body. Each STM cavity includes a chamfered opening at one end of the STM cavity coincident with the external surface of the hollow body. The chamfered opening configured to expel a stream of a gas in a gas-flow direction which is at least one of perpendicular to and offset from the longitudinal axis. The embodiments also include a missile and method for producing a steering force.

Abstract: An improved hollow point bullet has a core of a soft, dense metal having a generally cylindrical rear section, a tapering front section, and an open forward end opening to a cavity. A jacket of a harder metal than the core surrounds at least the rear and front sections of the core, and extends at least partially into the cavity. An expander of a rigid polymer is disposed in the cavity, substantially filling the cavity and providing at least one passage through to the bottom of the cavity.

Abstract: An archery projectile locating facility comprises an elongated body. The elongated body includes a connection facility adapted to connect to the archery projectile. The elongated body includes a microcontroller. The elongated body includes a sensor facility in communication with the microcontroller and operable to detect a flight state. The elongated body includes a transmitter in communication with the microcontroller and operable to broadcast at least one data signal after the flight state has been detected. The at least one data signal includes information generated by the sensor facility.

Abstract: Disclosed is a multiple start torpedo including an aft body having an exhaust conduit defining a turbine end and a seawater end having an orifice. The multiple start torpedo includes an exhaust valve associated with the exhaust conduit including. The exhaust valve includes a fore section having a head and a valve stem. The exhaust valve includes an aft section tapered from the turbine end to the seawater end and defining a receptacle sized to receive the valve stem. The exhaust valve includes a biasing member disposed to bias the head in an extended position spaced apart from the aft section and abut the orifice in the extended position.

Abstract: An apparatus for storing and/or shipping explosive components, such as shaped charges, is generally described. In an embodiment, the apparatus includes a shielding assembly. The shielding assembly may include a shielding panel having a body made of metal foam and an aperture formed within the body. In an embodiment, the body is sandwiched between an upper and a lower layer. The shielding panel is configured to receive a shaped charge. Thus, the apparatus is capable of at least preventing and/or limiting ballistic transfer in the event of detonation of a shaped charge.

Abstract: A blast containment system for trash cans includes a donut-shaped bag having a sealed donut-shaped bottom positioned at the base of the trash can, and an open donut-shaped top positioned and retained at a top periphery of the trash can. An open-ended tubular region extends through the bag between its donut-shaped top and donut-shaped bottom. A rigid container having an open top is disposed in the tubular region of the bag with its open top being coupled to the donut-shaped top of the bag. A liquid fills the bag.

Abstract: The present disclosure provides a blade inspection device, a method and a printing modification device, and belongs to the technical field of screen printing. The blade inspection device includes a telescopic component, a driving component and a parameter obtaining module. The driving component is configured to drive the telescopic component to move in a direction parallel to the line where the blade is located. The parameter obtaining module is configured to obtain a first parameter to inspect the blade according to the first parameter. The first parameter is related to a displacement of the first end of the telescopic component in a direction perpendicular to the line where the blade is located.

Abstract: A position sensing system for measuring a position of a moving object includes an electromagnet configured to generate an alternating magnetic field, and a magnetic sensor configured to measure an intensity of a first magnetic field that is based on the alternating magnetic field. A controller is configured to estimate a position of the moving object based on the measured intensity of the first magnetic field.

Abstract: Magnetic sensing technology can be used to detect changes, or disturbances (e.g., changes in magnetic field strength), in magnetic fields and can be used to measure the precise location/positioning of an electronic device in proximity to a magnetic source. In order to avoid interference by earth's static magnetic field, a modulated magnetic field can be used for magnetic based proximity sensing. Received modulated magnetic field signals can be demodulated to determine proximity of the sensor to the source of the modulated magnetic field. Devices such as gloves or devices with fingertip nodes based on receiving modulated magnetic fields can be used to detect user hand position.

Abstract: A magnetic angle sensor device and a method for operating such device is provided. The magnetic angle sensor device includes a shaft rotatable around a rotation axis; a magnetic field source coupled to the shaft; a first magnetic angle sensor configured to generate a first signal that represents a first angle based on a first diametric magnetic field from the magnetic field source applied to the first magnetic angle sensor; a second magnetic angle sensor configured to generate a second signal that represents a second angle based on a second diametric magnetic field from the magnetic field source applied to the second magnetic angle sensor; and a combining circuit configured to determine a combined rotation angle based on the first signal and on the second signal.

Abstract: A system and method for measuring three-dimensional (3D) coordinate values of an environment is provided. The method including moving a 2D scanner through the environment. A 2D map of the environment is generated using the 2D scanner. A path is defined through the environment using the 2D scanner. 3D scan locations along the path are defined using the 2D scanner. The 2D scanner is operably coupled to a mobile base unit. The mobile base unit is moved along the path based at least in part on the 2D map and the defined path. 3D coordinate values are measured at the 3D scan locations with a 3D scanner, the 3D scanner being coupled to the mobile base unit.

Abstract: An inductive position detector (IPD) for stylus position measurement in a scanning probe comprises a coil board configuration located along a central axis in the probe with a motion volume extending on opposite sides of the coil board configuration. The coil board configuration includes N top rotary sensing coils (RSCs) and a top axial sensing coil configuration (ASCC), and N bottom RSCs and a bottom ASCC. A pair of stylus-coupled conductive disruptors move along Z (axial) and X-Y (rotary) directions in the motion volume. A generating coil (GC) of the coil board configuration generates a changing magnetic flux (e.g., encompassing all or at least part of the disruptors), and coil signals indicate the disruptors and/or stylus positions. Areas of the conductive disruptors may be larger than an area of the generating coil in some implementations, and the conductive disruptors may each comprise a plurality of concentric conductive loops, spirals, etc.

Abstract: A displacement measuring apparatus measures a displacement of a measurement object by using a captured image where the measurement object and a load object are imaged. The displacement is caused by the load object in contact with the measurement object at a contact position. The displacement measuring apparatus includes a position detector, an area setting unit and a displacement calculator. The position detector detects a position, of the load object, in the captured image. The area setting unit sets a position and a size of a detection area in the captured image by using distance information and the position of the load object detected by the position detector, the distance information spatially indicating a distance between the measurement object when the load object is not on the measurement object and an imaging device that generates the captured image. The displacement calculator calculates the displacement by using only an image in the detection area in the captured image.

Abstract: A system for classifying objects detected in shearographic images identifying via a derivative peaks method, process, or algorithm is accomplished with a CNN (CNN). The system utilized training techniques of the CNN to classify objects as threats or non-threats. The system utilizes extracted clips from the shearographic image that contain the presence of an object so that the extracted clip containing the object is/are evaluated by the CNN to classify the object on or below a surface that has been insonified or otherwise stimulated to generate the shearographic image.

Abstract: A three-dimensional measurement device includes: a projector that includes: a light source that emits predetermined light; and a reflective optical modulator that converts the predetermined light into a predetermined striped pattern, wherein the projector projects the predetermined striped pattern onto a measurement object at a predetermined number of frames per unit time; an imaging device that takes an image of the measurement object projected with the predetermined striped pattern; a processor that: controls the projector and the imaging device to sequentially project a plurality of different ones of the predetermined striped pattern and take images of the plurality of different ones of the predetermined striped pattern to obtain a plurality of image data having different light intensity distributions; and executes three-dimensional measurement of the measurement object based on the plurality of image data.

Abstract: A composite sine-trapezoidal fringe structured light 3D measurement method includes projecting trapezoidal fringe patterns onto a measured object and capturing fringe images; sorting the fringe images by brightness, resolving them into uniform light images and sinusoidal light images, and obtaining a sub-region ordinal number of each image; using the uniform light image to identify a strength response model of the captured fringe image, and obtaining a strength response model parameter; an actual projection strength, a sub-region phase of the sinusoidal light image according to the actual projection strength, a wrapped phase according to sub-region phase and sub-region ordinal number, an absolute phase according to the wrapped phase and sub-region ordinal number, a surface point of the measured object at the positions of a projector pixel and a camera pixel according to the absolute phase, and an object surface model of the measured object by a reconstruction by triangulation.

Abstract: A handheld large-scale three-dimensional measurement scanner system simultaneously having photogrammetric and three-dimensional scanning functions includes: two cameras at fixed positions; at least one pattern projector; a photogrammetric module; and a three-dimensional scanning module, wherein at least one of the two cameras is a multipurpose camera that performs photogrammetry and three-dimensional scanning, wherein the photogrammetric module is configured to perform, by operating the multipurpose camera, global photogrammetry on a measured object and obtain three-dimensional coordinates of markers on a surface of the object, and wherein the three-dimensional scanning module is configured to perform, by operating the two cameras and the one pattern projector, three-dimensional scanning on the measured object by using the obtained markers as global positioning information of the measured object, and obtain three-dimensional contour data of the surface of the object.