Abstract: A portable fan include: a handheld portion; a housing, connected to the handheld portion; a display screen, arranged on the fan housing or the handheld portion and configured to display a currently airflow speed level and an adjustable airflow speed interval formed by the adjustable airflow speed interval; and an airflow speed regulator, configured to receive a control instruction that is in a continuous state or has a changing trend and configured to perform, through the control instruction, a continuous adjustment or an adjustment in a skip-level manner on the current airflow speed level within the adjustable airflow speed interval. For the continuous adjustment, an adjustment magnitude in which the current airflow speed level is adjusted is one level; and for the adjustment in the skip-level manner, the adjustment magnitude in which the current airflow speed level is adjusted is greater than or equal to two levels.

Abstract: A portable fan, including: a housing, a mixed-flow fan, and a booster. An air inlet portion is arranged at a rear side of the housing, an air outlet portion is arranged at a front side of the housing, the air inlet portion and the air outlet portion are fluidly communicated to each other through an interior of the housing. The mixed-flow fan is arranged inside the housing; the mixed-flow fan is configured to rotate around a rotation shaft to generate an airflow. The booster is disposed inside the housing and surrounds an outer periphery of the mixed-flow fan. The booster includes a booster surface facing the mixed-flow fan; a radial size of at least part of the booster surface gradually increases in a direction from the rear side to the front side; a gap is formed between the booster and the housing.

Abstract: A portable fan includes: a housing, a mixed-flow fan, and a pressurizing member. An air inlet portion is arranged at a rear side of the housing, an air outlet portion is arranged at a front side of the housing. The mixed-flow fan is arranged inside the housing and can rotate around a rotation shaft to generate an airflow. The pressurizing member is disposed at a front of the mixed-flow fan and includes a pressurizing seat having a pressurizing surface, and a radial size of at least part of the pressurizing surface gradually increases from the rear side to the front side. A cross-sectional area, in a radial direction of the housing, of a front end of the pressurizing seat is defined to enable the air inlet portion to be invisible by being shielded by the pressurizing seat, when viewing from the front side to the rear side.

Abstract: A portable fan includes: a housing, a mixed-flow fan, and a pressurizing member. The mixed-flow fan includes a rotation seat, an extension wall, a motor, and a plurality of first blades; the plurality of first blades are mounted on the rotation seat; the extension wall and the rotation seat cooperatively define a first cavity; a pressurizing seat of the pressurizing member has a second cavity; the extension wall is inserted into the second cavity. An orthographic projection of the first cavity along a radial direction onto a side wall of the housing is at least partially overlapped with an orthographic projection of the second cavity along the radial direction onto the side wall of the housing; the motor is received in the first cavity and the second cavity.

Abstract: The present application relates to the field of fan, a portable fan is specifically designed, featuring the technical advantages of high efficiency, low noise, and adjustable wind speed.

Abstract: A portable fan includes a fan and a power supply drive assembly electrically connected to the fan. The power supply drive assembly includes a battery and a fan drive circuit electrically connected to the battery; the fan drive circuit includes: a master control circuit; and a three-phase drive circuit, including at least three signal input ends and three drive signal output ends. Each of the at least three signal input ends is electrically connected to the master control circuit to receive control signals; each of the three drive signal output ends is electrically connect to a respective one of three signal ends of a fan motor to respectively output the three-phase drive signal to drive the fan motor to rotate. The battery is configured to supply power to the fan drive circuit.

Abstract: A portable fan includes: a fan and a power supply drive assembly electrically connected to the fan. The power supply drive assembly comprises a battery and a fan drive circuit electrically connected to the battery. The fan drive circuit includes a master control circuit; a three-phase drive circuit; and an inverted-phase electric potential detection circuit. The battery is configured to supply power to the fan drive circuit.

Abstract: A portable fan includes: an airflow portion and a display screen. The airflow portion includes an air outlet, the air outlet is disposed surrounding a periphery of the display screen. The display screen has an outer surface at least partially curved; and/or the display screen is configured to display at least one of: a remaining battery power level, a current air speed, a battery power level during charging, and an operating state.

Abstract: A portable fan configured with a high-speed three-phase motor is provided, the portable fan includes: a control module, a drive module, and the high-speed three-phase motor. The high-speed three-phase motor has an operating voltage of 2V to 18 V and an operating current of 0.1 to 10 A, and/or has a rated operating power of 0.5 to 100 W. The control module is configured to control, via the drive module and based on the operating voltage, the operating current, and/or the rated operating power, a rated operating rotation speed of the high-speed three-phase motor to reduce noise generated due to a high rotation speed of the high-speed three-phase motor and to control an air speed to be within a preset air speed range.

Abstract: A portable fan includes an airflow portion and a handheld portion. The airflow portion includes rotation air blades and a drive portion that is driveably connected to the rotation air blades. The drive portion is a three-phase motor that is configured to drive the rotation air blades to rotate to generate an airflow. The handheld portion is connected to the airflow portion. A power supply assembly is arranged inside the handheld portion; and the power supply assembly is electrically connected to and supply power to the three-phase motor.

Abstract: A portable fan includes: a fan and a power supply drive assembly electrically connected to the fan. The power supply drive assembly comprises a battery and a fan drive circuit electrically connected to the battery. The fan drive circuit includes a master control circuit; a three-phase drive circuit; and an inverted-phase electric potential detection circuit. The battery is configured to supply power to the fan drive circuit.

Abstract: A portable fan includes a shell, a mix-flow fan, arranged inside the shell and configured to rotate around a rotation shaft to generate wind, and a booster, arranged inside the shell. The booster surrounds a circumference of the mix-flow fan. A first air channel is defined between the mix-flow fan and the booster.

Abstract: A handheld fan includes an air supply portion and a handheld portion. The handheld portion includes a first outer shell and a battery module arranged in the first outer shell. The battery module includes a battery housing, and a first storage battery and a second storage battery which are arranged in the battery housing. The first storage battery and the second storage battery are connected in series through an electrical connector. The first storage battery and the second storage battery are arranged in a battery housing. The first storage battery and the second storage battery are connected in series or in parallel through an electric connector, which increases the battery capacity of the handheld fan, so that when a user uses the handheld fan, the battery life can be longer, bringing a better user experience.

Abstract: A portable bladeless fan is provided and includes: a housing, a mix-flow fan, and a pressurizing member. The housing has an air inlet portion at a rear side of the housing and an air outlet portion at a front side of the housing. The mix-flow fan is configured to generate an airflow. The pressurizing member is connected to a front portion of the housing and disposed at a front of the mix-flow fan. The pressurizing member includes a pressurizing seat and second blades. The pressurizing seat includes a pressurizing surface that is at least partially increased in a radial direction from the rear side to the front side, the second blades are spaced apart from each other and are arranged on the pressurizing surface. The second blades re-arrange a direction of the airflow and to reduce a noise of the airflow.

Abstract: The present disclosure relates to a device and method for measuring wafers. The device comprises: a moving platform, which is used to adjust the location of wafers; a first pre-alignment module and a first image recognition module, which are used to align a first wafer at a first location on the moving platform before measuring the first wafer; a second pre-alignment module and a second image recognition module, which are used to align a second wafer at a second location on the moving platform before measuring the second wafer; and a measurement module, which is used to measure the first wafer and the second wafer at a third location on the moving platform, wherein the first location, second location and third location are different from each other. The embodiments of the present disclosure may improve the measurement efficiency of the device.

Abstract: The present disclosure relates to a device and method for measuring wafers. The device comprises: a moving platform, which is used to adjust the location of wafers; a first pre-alignment module and a first image recognition module, which are used to align a first wafer at a first location on the moving platform before measuring the first wafer; a second pre-alignment module and a second image recognition module, which are used to align a second wafer at a second location on the moving platform before measuring the second wafer; and a measurement module, which is used to measure the first wafer and the second wafer at a third location on the moving platform, wherein the first location, second location and third location are different from each other. The embodiments of the present disclosure may improve the measurement efficiency of the device.

Abstract: The present disclosure discloses a calibrating method, apparatus, and corresponding measurement system for a composite waveplate. The calibrating method comprises: A. determining a first matrix characterizing the composite waveplate, the first matrix including at least one unknown number; B. determining a theoretical relationship between a light intensity and an alignment angle offset value of the composite waveplate based on the first matrix; and C. calibrating based on the theoretical relationship between a light intensity and an alignment angle offset value of the composite waveplate determined in step (B) and actually measured light intensity data to obtain a second matrix that may characterize the composite waveplate and does not contain the unknown number. The technical solution of the present disclosure may greatly reduce the amount of unknown numbers when calibrating a composite waveplate or a measuring system, thereby lowering the difficulty of calibration and improving the precision of calibration.

Abstract: The present disclosure discloses a calibrating method, apparatus, and corresponding measurement system for a composite waveplate. The calibrating method comprises: A. determining a first matrix characterizing the composite waveplate, the first matrix including at least one unknown number; B. determining a theoretical relationship between a light intensity and an alignment angle offset value of the composite waveplate based on the first matrix; and C. calibrating based on the theoretical relationship between a light intensity and an alignment angle offset value of the composite waveplate determined in step (B) and actually measured light intensity data to obtain a second matrix that may characterize the composite waveplate and does not contain the unknown number. The technical solution of the present disclosure may greatly reduce the amount of unknown numbers when calibrating a composite waveplate or a measuring system, thereby lowering the difficulty of calibration and improving the precision of calibration.

Abstract: Methods and systems are provided to avoid the rotation action with the polarizer and the analyzer in complex ellipsometric measurement and repeated processes. In particular, methods and systems are provided which polarize the incident light in a fixed azimuthal angle then illuminate the polarized light onto the target surface, analyze the surface polarized characteristics light in a fixed azimuthal angle, and obtain the light intensity and phase information corresponding to the target surface. Then, based on the relationship between the characteristic information detected by electromagnetic wave and the light intensity information, the disclosed methods and systems obtain the characteristic information of the target surface.

Abstract: Methods and systems are provided to avoid the rotation action with the polarizer and the analyzer in complex ellipsometric measurement and repeated processes. In particular, methods and systems are provided which polarize the incident light in a fixed azimuthal angle then illuminate the polarized light onto the target surface, analyze the surface polarized characteristics light in a fixed azimuthal angle, and obtain the light intensity and phase information corresponding to the target surface. Then, based on the relationship between the characteristic information detected by electromagnetic wave and the light intensity information, the disclosed methods and systems obtain the characteristic information of the target surface.