Abstract: A simulator and test method of polarization transmission in sea fog belong to the technical field of polarization transmission characteristics. The simulator comprises an emitting device, a receiving device, a main box body, an automatic light alignment system, a water fog layer calibration system, a salt fog layer calibration system, and an aerosol layer calibration system. In accordance with the present disclosure, the automatic alignment of polarized light and a relatively stable sea fog environment are simulated in an indoor environment, the accuracy of indoor simulation is improved, the conformity between measured data and a theoretical simulation result is superior to 80%, and a reliable technical support is provided for the sea surface detection.

Abstract: The hinge mechanism includes a main shaft, a first rotating piece, a first mounting plate, a first magnetic piece, a first magnetic fitting piece, a second rotating piece, a second mounting plate, a second magnetic piece, and a second magnetic fitting piece. The first rotating piece, the first mounting plate, the second rotating piece, and the second mounting plate are rotatably connected to the main shaft. The first rotating piece is slidably connected to the first mounting plate. The second rotating piece is slidably connected to the second mounting plate. The first magnetic piece is on the first rotating piece. The first magnetic fitting piece is located on the first mounting plate and magnetically attracts the first magnetic piece. The second magnetic piece is on the second rotating piece. The second magnetic fitting piece is on the second mounting plate and magnetically attracts the second magnetic piece.

Abstract: A hinge mechanism includes a base and two rotating components. Each rotating component includes a support arm, a swing arm, and a housing mounting bracket. The two support arms are respectively disposed on two sides of the base and are rotatably connected to the base. The two swing arms are respectively disposed on two sides of the base and are rotatably connected to the base. Each of the two housing mounting bracket is provided with two sliding grooves. For a support arm, a swing arm, and a housing mounting bracket that are located on a same side of the base, the support arm and the swing arm may separately slide in a sliding groove, and projections of sliding directions of the support arm and the swing arm are not parallel in a reference plane perpendicular to the rotation axes of the support arm and the swing arm.

Abstract: The hinge mechanism includes a base and a main hinge module. The base includes a support surface for supporting a flexible display. The main hinge module includes a first rotating component and a second rotating component disposed on two opposite sides of the base. The first rotating component includes a first support plate, and the first support plate includes a first plate surface for supporting the flexible display. The second rotating component includes a second support plate, and the second support plate includes a second plate surface for supporting the flexible display. When the hinge mechanism is in a folded state, an included angle between the first plate surface and a bearing surface is less than an included angle between the second plate surface and the bearing surface, to form display accommodating space between the first plate surface, the second plate surface, and the bearing surface.

Abstract: The rotation shaft structure includes a main shaft assembly, and two folding assemblies that are symmetrically disposed with respect to the main shaft assembly. The two folding assemblies may rotate toward or against each other relative to the main shaft assembly. When the folding assembly is specifically disposed, the folding assembly includes a rotation assembly, a support plate, and a housing mounting bracket. The rotation assembly is rotationally connected to the main shaft assembly. The support plate is rotationally connected to the housing mounting bracket and slidably connected to the rotation assembly.

Abstract: A rotating shaft mechanism and an electronic device comprising the rotating shaft mechanism are provided. In an implementation, the rotating shaft mechanism includes a base, a first driving part, a guiding part, and a second driving part. The base includes a fastener and two first rotating arms. The fastener is fastened to the base. One end of each first rotating arm is rotatively connected to the fastener, and the other end is fastened to a middle frame. The guiding part includes two guiding blocks. Each guiding block is rotatively connected to the base, each guiding block corresponds to one first rotating arm, and the guiding block is linked to the first rotating arm. The second driving part includes two second rotating arms, the second rotating arm is fastened to a casing, and the second rotating arm is linked to the guiding block.

Abstract: Embodiments provide a rotating shaft mechanism applicable to the field of foldable displays of electronic device technologies. The rotating shaft mechanism includes a main body, a first support plate, a second support plate, a middle support plate, a first swing arm, and a second swing arm. The first swing arm, the main body, and the first support plate may form a slider-crank, and the second swing arm, the main body, and the second support plate also form a slider-crank. The middle support plate may move relative to the main body when driven by at least one of the first support plate, the second support plate, the first swing arm, or the second swing arm.

Abstract: A rotating shaft mechanism includes a body, a first door plate, a second door plate, an intermediate door plate, a first connecting rod assembly, and a second connecting rod assembly. The first connecting rod assembly includes a first housing connecting rod, a first gear connecting rod, and a first secondary connecting rod. The rotating shaft mechanism further includes a first meshing transmission structure. The first housing connecting rod, the first gear connecting rod, the first secondary connecting rod, the first door plate, and the body form a crank-slider structure to drive the first door plate to rotate relative to the body. The first gear connecting rod drives the intermediate door plate to move relative to the body using the first meshing transmission structure.

Abstract: A foldable hinge includes a base and two folding assemblies. The two folding assemblies are located on two sides of the base, are both connected to the base, and are capable of being opened or closed relative to each other. Each of the two folding assemblies includes a first swing arm, a second swing arm, a synchronous gear, and a support component. The first swing arm is pivotally connected to the base. The second swing arm is pivotally connected to the base. The synchronous gear is located in the base, and the first swing arm and the second swing arm are connected through transmission by using the synchronous gear. The support component is pivotally connected to the first swing arm, is linked to the second swing arm, and is capable of rotating relative to the first swing arm under an action of the second swing arm.

Abstract: A rotating shaft mechanism (1) includes a main shaft module (101), and the main shaft module (101) includes a base (1013), a first support plate (1011), a second support plate (1012), a first gear linkage (1014), a second gear linkage (1015), an elastic mechanical part (1022), and a conjoined cam (1021). The first support plate (1011) and the second support plate (1012) are rotatably connected to the base (1013). The first gear linkage (1014) and the second gear linkage (1015) are rotatably connected to an end portion of the base (1013), and the first gear linkage (1014) and the second gear linkage (1015) are connected through transmission by using gears that are engaged with each other.

Abstract: This application provides a rotation shaft structure and an electronic device. The rotation shaft structure includes a main shaft assembly, and two folding assemblies. The folding assembly includes a rotation assembly, a support plate, and a housing mounting bracket. The rotation assembly is rotationally connected to the main shaft assembly. The support plate is rotationally connected to the housing mounting bracket and slidably connected to the rotation assembly. When two housing mounting brackets rotate toward each other, two support plates rotate in a same direction relative to the housing mounting brackets on corresponding sides, so that the two support plates and the main shaft assembly can form a triangle-like display accommodation space. When the electronic device is in a closed state, the display accommodation space can be used for accommodating a bent portion of the flexible display, so that the flexible display is not damaged by extrusion.

Abstract: This disclosure relates to a folding module and a foldable electronic device. A first protrusion and a first sliding slot are provided between a drive portion and a first connection member. A second protrusion and a second sliding slot are provided between the drive portion and a second connection member. A first drive spring and a second drive spring press against the drive portion. In a process in which the first support member folds or unfolds relative to the second support member, folding or unfolding can be implemented provided that the first support member and the second support member rotate by a relatively small angle, so that a speed of folding or unfolding of the first support member relative to the second support member is increased.

Abstract: A rotating shaft structure includes a damping component, a first shaft body and a second shaft body. A first limiting slot is disposed on a circumferential surface of the first shaft body. The damping component is located between the first shaft body and the second shaft body. The damping component includes one or more damping groups. Each damping group includes an elastic part and a first ball. The first ball abuts against the circumferential surface of the first shaft body by using elastic force of the elastic part. A second end of the elastic part is elastically connected to the circumferential surface of the second shaft body. In a rotation process of the first shaft body, the first ball rolls relative to the circumferential surface of the first shaft body and can be positioned in the first limiting slot.

Abstract: This disclosure relates to a folding module and a foldable electronic device. A first protrusion and a first sliding slot are provided between a drive portion and a first connection member. A second protrusion and a second sliding slot are provided between the drive portion and a second connection member. A first drive spring and a second drive spring press against the drive portion. In a process in which the first support member folds or unfolds relative to the second support member, folding or unfolding can be implemented provided that the first support member and the second support member rotate by a relatively small angle, so that a speed of folding or unfolding of the first support member relative to the second support member is increased.

Abstract: A folding apparatus includes a first housing, a first support plate, a middle housing, a first mounting bracket, a first transmission arm, and a first rotating arm. The first mounting bracket is fixed to the first housing, the first transmission arm is rotatably connected to the middle housing, a rotation center is a first axis, and the first transmission arm is slidably connected to the first mounting bracket and slidably connected to the first support plate. The first rotating arm is rotatably connected to the middle housing, a rotation center is a second axis, the first rotating arm is rotatably connected to the first mounting bracket, and the second axis and the first axis are not collinear. The first support plate is rotatably connected to the first mounting bracket, so that the first housing and the first support plate switch between a flattened state and a folded state.

Abstract: This application provides a rotation shaft structure and an electronic device. The rotation shaft structure includes a main shaft assembly, and two folding assemblies. The folding assembly includes a rotation assembly, a support plate, and a housing mounting bracket. The rotation assembly is rotationally connected to the main shaft assembly. The support plate is rotationally connected to the housing mounting bracket and slidably connected to the rotation assembly. When two housing mounting brackets rotate toward each other, two support plates rotate in a same direction relative to the housing mounting brackets on corresponding sides, so that the two support plates and the main shaft assembly can form a triangle-like display accommodation space. When the electronic device is in a closed state, the display accommodation space can be used for accommodating a bent portion of the flexible display, so that the flexible display is not damaged by extrusion.

Abstract: An exhaust gas recirculation system includes a first turbocharger and a second turbocharger connected in series. An outlet of a turbine of the second turbocharger is connected to an exhaust pipe. An inlet of a compressor of the second turbocharger is connected to the exhaust pipe by means of an EGR gas collection pipe, and an outlet of the compressor of the second turbocharger is connected to an intake manifold by means of a low-pressure EGR exhaust pipe. The system employs energy of exhaust gas to drive turbines of a two-stage turbocharging system, thereby increasing utilization of the exhaust gas and improving the economic efficiency of an engine. An engine is also disclosed.