Abstract: A vehicle measurement device includes a base module, a column module, a cross beam module, and a camera assembly. The column module includes a fixed column, a movable column assembly, and a drive assembly. The fixed column is connected to the base module. The movable column assembly is mounted on the fixed column. The movable column assembly is connected to the drive assembly. The drive assembly is used for driving the movable column assembly to lift or lower relative to the fixed column. The cross beam module is supported by the movable column assembly. The cross beam module is used for supporting a calibration element. The camera assembly is mounted on the cross beam module. The camera assembly is used for capturing wheel information of a vehicle. By means of the structure, the vehicle measurement device can not only calibrate an ADAS, but also perform four-wheel positioning.

Abstract: The present disclosure provides a silicon-based infrared band avalanche photodetector and a fabrication method thereof. The photodetector includes a bottom electrode layer, a silicon film layer, and a top metal film layer stacked sequentially, where the bottom electrode layer forms an ohmic contact with the silicon film layer, and the top metal film layer forms a Schottky contact with the silicon film layer. The photodetector absorbs near-infrared light through the top metal film layer, generates hot carriers, and injects the hot carriers into the silicon film layer, and the hot carriers are collected by the bottom electrode layer to form a photocurrent, thereby achieving the detection of infrared light with energy below a band gap of silicon. Moreover, broadband or narrowband optical high absorption at different infrared wavelengths can be achieved by adjusting a thickness of the silicon film layer and a type of the top metal film layer.

Abstract: The present invention provides a method for determining a failure cause of a salt chlorinator for a swimming pool, includes: determining whether a water quality test report of swimming pool water can be provided; and if not, proceeding: determining whether there is a problem with the salt chlorinator, where the determining whether there is a problem with the salt chlorinator includes determining whether there is a posed problem and/or determining electrode life, includes: determining whether there is the posed problem; performing calculation based on a posed problem determining formula and determining whether a value thereof is greater than 0; and if not, outputting a first alarm signal; and determining electrode life; performing calculation based on an electrode life determining formula, and determining whether a value is less than a threshold A; and if not, determining that the electrode life is to be exhausted, and outputting a second alarm signal.

Abstract: A three-dimensional scanning system, a method and a mobile computing module are provided. The three-dimensional scanning system includes a three-dimensional scanner, a computing module, and a display module The computing module is connected to the three-dimensional scanner to obtain target three-dimensional data generated by the three-dimensional scanner, and perform a calculation of a three-dimensional reconstruction according to the target three-dimensional data to generate a first three-dimensional model. The display module is connected to the computing module to obtain the first three-dimensional model generated by the computing module, and display the first three-dimensional model in real time.

Abstract: The invention provides a silicon-based room-temperature infrared hot-electron photodetector, preparation method and use thereof. The photodetector includes a base and a planar multi-layer structure. The planar multi-layer structure includes a bottom conductive electrode, a silicon film, a transition metal film, and a transparent dielectric film. The electrode and the silicon film form an ohmic contact and constitute an optical reflector. The silicon film and the transition metal film form a Schottky contact, the thickness of the silicon film is smaller than the depletion layer width of a Schottky junction formed by the silicon film and the transition metal film, the transition metal film absorbs near infrared light and generates hot electrons to be injected into the silicon film, and the hot electrons are collected by the electrode to form a photocurrent. The transparent dielectric film is used as an antireflection layer and can reduce reflection of incident light.

Abstract: A polarity reversal method for an electrode device based on an unstable power supply is provided. The electrode device includes electrodes, an unstable power supply, a polarity reversal module, and a control module, the unstable power supply supplies power to the electrode through the polarity reversal module, and the control module controls the polarity reversal module to implement polarity reversal on the electrodes. The polarity reversal method includes: at least in a stage in which a reverse voltage is eliminated for the electrodes when polarity reversal is performed on the electrode device based on the unstable power supply, limiting the amount of electric energy transmitted by the unstable power supply to the electrodes, or controlling a stable power supply to be connected to supply power to the electrodes, to ensure electric energy required for operation of the control module in the electrode device based on the unstable power supply.

Abstract: Provided is a transformable toy including a vehicle body having a lower surface provided with wheels and an upper surface opposite to the lower surface, and a straight-running driving assembly disposed in the vehicle body. The vehicle body includes at least two sections, a rotation driving assembly is disposed between two adjacent sections of the vehicle body and configured to drive the at least two sections of the vehicle body to rotate relative to each other to transform the vehicle body; when the at least two sections of the vehicle body rotate relative to each other into a transformed state, the vehicle body is in a rollable shape; when the at least two sections of the vehicle body rotate relative to each other into an unfolded state, the vehicle body runs under the action of the straight-running driving assembly.

Abstract: A drift motorcycle includes a body and an advancing unit provided on the body and configured to provide advancing power for the body, and the body is further provided with a tilting unit and a transverse moving unit. The tilting unit is movably mounted on the body, and two ends of the tilting unit extend from two sides of the body to control the body to be switched between an upright state and a tilted state. The transverse moving unit is arranged at two sides of the body, and the transverse moving unit is configured to be in contact with a driving surface to generate a transverse power in a width direction of the body when the tilting unit controls the body to be switched to the tilted state.

Abstract: A vehicle measurement device includes a base module, a column module, a cross beam module, and a camera assembly. The column module includes a fixed column, a movable column assembly, and a drive assembly. The fixed column is connected to the base module. The movable column assembly is mounted on the fixed column. The movable column assembly is connected to the drive assembly. The drive assembly is used for driving the movable column assembly to lift or lower relative to the fixed column. The cross beam module is supported by the movable column assembly. The cross beam module is used for supporting a calibration element. The camera assembly is mounted on the cross beam module. The camera assembly is used for capturing wheel information of a vehicle. By means of the structure, the vehicle measurement device can not only calibrate an ADAS, but also perform four-wheel positioning.

Abstract: Provided is a transformable toy including a vehicle body having a lower surface provided with wheels and an upper surface opposite to the lower surface, and a straight-running driving assembly disposed in the vehicle body. The vehicle body includes at least two sections, a rotation driving assembly is disposed between two adjacent sections of the vehicle body and configured to drive the at least two sections of the vehicle body to rotate relative to each other to transform the vehicle body; when the at least two sections of the vehicle body rotate relative to each other into a transformed state, the vehicle body is in a rollable shape; when the at least two sections of the vehicle body rotate relative to each other into an unfolded state, the vehicle body runs under the action of the straight-running driving assembly.

Abstract: A drift motorcycle includes a body and an advancing unit provided on the body and configured to provide advancing power for the body, and the body is further provided with a tilting unit and a transverse moving unit. The tilting unit is movably mounted on the body, and two ends of the tilting unit extend from two sides of the body to control the body to be switched between an upright state and a tilted state. The transverse moving unit is arranged at two sides of the body, and the transverse moving unit is configured to be in contact with a driving surface to generate a transverse power in a width direction of the body when the tilting unit controls the body to be switched to the tilted state.

Abstract: An orth-mode transducer (OMT) assembly, including an OMT common port, an OMT feeder, and a polarization separated core. An input end of the OMT common port is connected to a single polarization antenna, one end of the OMT feeder is connected to an output end of the OMT common port, and an other end of the OMT feeder is connected to the polarization separated core, the OMT feeder has a tubular structure, and horizontal and vertical axes of an inner wall cross section of the OMT feeder are unequal, or a tuning rod is disposed in a tube of the OMT feeder and is perpendicular to an extension direction of the tube, and a vertical polarization port and a horizontal polarization port are disposed in the polarization separated core, the vertical polarization port transmits a vertical polarization wave, and the horizontal polarization port transmits a horizontal polarization wave.

Abstract: An orth-mode transducer (OMT) assembly, including an OMT common port, an OMT feeder, and a polarization separated core. An input end of the OMT common port is connected to a single polarization antenna, one end of the OMT feeder is connected to an output end of the OMT common port, and an other end of the OMT feeder is connected to the polarization separated core, the OMT feeder has a tubular structure, and horizontal and vertical axes of an inner wall cross section of the OMT feeder are unequal, or a tuning rod is disposed in a tube of the OMT feeder and is perpendicular to an extension direction of the tube, and a vertical polarization port and a horizontal polarization port are disposed in the polarization separated core, the vertical polarization port transmits a vertical polarization wave, and the horizontal polarization port transmits a horizontal polarization wave.

Abstract: A light modulator (e.g., for terahertz radiation) may be constructed using a prism in which light undergoes total internal reflection (TIR) at one surface. A tunable conductive layer is disposed on the TIR surface. The tunable conductive layer can have a conductivity that is dynamically controllable, e.g., by applying a voltage across the tunable conductive layer or by optically pumping the tunable conductive layer. The tunable conductive layer can absorb a portion of the reflected light beam, attenuating the beam, with the attenuation being a function of the electrical conductivity of the tunable conductive layer. The phase of the reflected light beam can also be altered as a function of electrical conductivity of the tunable conductive layer.

Abstract: A light modulator (e.g., for terahertz radiation) may be constructed using a prism in which light undergoes total internal reflection (TIR) at one surface. A tunable conductive layer is disposed on the TIR surface. The tunable conductive layer can have a conductivity that is dynamically controllable, e.g., by applying a voltage across the tunable conductive layer or by optically pumping the tunable conductive layer. The tunable conductive layer can absorb a portion of the reflected light beam, attenuating the beam, with the attenuation being a function of the electrical conductivity of the tunable conductive layer. The phase of the reflected light beam can also be altered as a function of electrical conductivity of the tunable conductive layer.