9results about How to "Auto switch" patented technology

The utility model discloses an automatic sand blasting machine which comprises a protective shell, a partition plate is fixedly connected to the interior of the protective shell, evenly-distributed leaking holes are formed in the rear side of the upper surface of the partition plate, an adjustable rotating disc is arranged on the upper side of the partition plate, a spray gun is fixedly connected to the rear surface of the interior of the protective shell, and the automatic sand blasting machine further comprises a transmission mechanism. And the transmission mechanism comprises a rotating rod, a second transmission shaft, a fourth gear, a fifth gear and third transmission shafts, the rotating rod is rotationally connected to the front side of the upper surface of the partition plate, the upper end of the rotating rod is fixedly connected with the lower surface of the rotating disc, and the evenly-distributed third transmission shafts are rotationally connected to the interior of the rotating disc. Materials can rotate during sand blasting, so that the materials are subjected to sand blasting by one circle, the sand blasting angle is wider, meanwhile, the materials can be automatically switched after the materials are subjected to sand blasting, and an operator does not need to manually operate for multiple times.

The present application relates to the technical field of environmental characteristic measurement, and particularly relates to a kind of sea-air environment dual-band infrared radiation characteristic measurement method and device.The method comprises: the portable measuring device is built on the shipborne platform;Control two-dimensional rotary table to rotate according to N type variable speed scanning path, and synchronously control mid-long wave thermal imager to carry out continuous image acquisition, while by photoelectric inertial navigation real-time record attitude information;Based on the time axis of photoelectric inertial navigation, each frame infrared image is aligned with the corresponding accurate azimuth and pitch angle Data, and the image gray value is converted into radiation brightness;Finally, the results are summarized.The device includes tripod, two-dimensional rotary table, adapter plate and the mid-long wave thermal imager and photoelectric inertial navigation fixed thereon.The present application synchronizes and aligns the data of photoelectric inertial navigation and thermal imager, effectively compensates the disturbance of ship body posture, solves the problem of low accuracy of infrared radiation measurement data on dynamic platform, and simultaneously has the advantages of fast response and portability.

The application provides a power supply circuit and a portable oxygen generator, wherein the power supply circuit is used for being connected with a load, and the power supply circuit comprises an interface circuit, a switching circuit, a control circuit, a boosting circuit and a driving circuit. The interface circuit is used for being connected with a first power supply; the switching circuit is connected with the interface circuit, and the switching circuit is also used for being connected with a second power supply; the control circuit is connected with the switching circuit, the interface circuit and the second power supply respectively, and the control circuit is used for controlling the switching circuit to switch the connection between the interface circuit and the second power supply; the boosting circuit is connected with the switching circuit; and the driving circuit is connected between the boosting circuit and the load, and the driving circuit is used for transforming the direct-current output voltage of the boosting circuit into alternating-current working voltage. In the above manner, the power supply demand in various scenes can be met, the stable operation of the power supply circuit and the electronic equipment is ensured, and the appropriate voltage and current supply are provided for the electronic equipment.

The invention discloses an adjustable energy-saving solar street lamp, relates to the technical field of solar street lamps, and aims to solve the technical problem that the conventional road surface brightness at night is not uniform due to the fixed illumination angle and lighting effect mode of an existing street lamp, and the adjustable energy-saving solar street lamp comprises a lamp post, a lamp cap, a solar panel and an adjusting mechanism. Through the angle adjusting assembly composed of the supporting cylinder, the supporting rod and the electric push rod, multi-mode adjustment of the illumination angle of the lamp holder is achieved, and the problems that the illumination direction of an existing solar street lamp is fixed and single, and different requirements of night driving guiding and severe weather safety warning cannot be met are solved; and on-demand energy saving cannot be realized in a low traffic flow period. In a conventional night mode, the lamp holder can be adjusted to project in an inclined mode in the driving direction, a continuous and uniform light blanket is formed, the sight distance of a driver is remarkably prolonged, the zebra crossing effect is eliminated, and energy is saved. In the foggy day mode, the lamp holder can be adjusted to obliquely irradiate in the direction opposite to the running direction, and a basis is provided for follow-up collaborative atomization lighting effect.

The invention discloses a hybrid five-level bidirectional active bridge containing an auxiliary branch and a control method thereof, and relates to the technical field of power electronics, and the hybrid five-level bidirectional active bridge comprises the steps: introducing an auxiliary bridge arm and a coupling auxiliary transformer into a primary side circuit, and enabling the primary side of a high-frequency transformer to generate five step levels by controlling the state of the bridge arm. According to the control, real-time voltage gain is calculated, a target switch time sequence mode is automatically selected according to the relation between the real-time voltage gain and a preset reference threshold value, and an optimal phase shift combination is calculated by calling a GOC optimization algorithm with the purpose of minimizing inductive current stress. According to the method, a plurality of voltage matching points are physically constructed through the coupling auxiliary transformer, and more control freedom degrees are provided for current stress optimization; and a GOC optimization equation is utilized to ensure that the device operates at a current stress minimum point under all working conditions. Through collaborative optimization of software and hardware, current stress of all working conditions is reduced, a ZVS region in a full load range is widened, and efficiency and stability of a wide voltage working range are improved.

The utility model discloses a kind of NAVTEX four-line audio circuit switching systems based on single-chip microcontroller control, comprising: instruction terminal, serial control module, single-chip microcontroller control module, state storage module, control signal monitoring module, line switching module, NAVTEX signal input module, NAVTEX signal output module, first / second signal monitoring module;Main instruction terminal is electrically connected with serial control module, serial control module is electrically connected with single-chip microcontroller control module, single-chip microcontroller control module is electrically connected with button control module, display module, state storage module, control signal monitoring module, line switching module, line switching module is electrically connected with NAVTEX signal input module, NAVTEX signal output module, NAVTEX signal input and output module are electrically connected with first signal monitoring module and second signal monitoring module respectively;The utility model can be used for maritime NAVTEX system audio signal line automatic switching, remote control line switching, signal transmission quality monitoring, line connection state storage and inquiry.

The utility model relates to an automatic switching device for a horizontal mask plate. The automatic switching device sequentially comprises a horizontal carrying assembly and an optical assembly from left to right, a stock bin lifting assembly is arranged at the bottom of the left side of the horizontal carrying fixing plate, and a lifting lead screw module drives a stock bin above to move in the vertical direction. A plurality of laminates are evenly distributed in the stock bin in the vertical direction, and fool-proof pins matched with fool-proof pin holes in the bottom of a mask are installed on one sides of the laminates. And a tidying assembly is arranged on the horizontal carrying fixing plate below the carrying arm. The utility model is suitable for equipment with frequently replaced masks, and has the advantages of simplicity, rapidness, stable structure, safety, high efficiency and high automation level.

This utility model relates to the field of wind turbine generator box-type transformer technology, specifically to a high-voltage side power supply monitoring device for a box-type transformer based on a voltage transformer. The device includes: a first voltage side, a box-type transformer, a second voltage side, a UPS, a dual-power switching device, and a power consumption side connected in sequence. The first voltage side includes: a first voltage cable inlet and a first voltage switch connected in sequence, and a voltage transformer. The first voltage winding of the voltage transformer is connected to the first voltage cable inlet, the second voltage winding of the voltage transformer is connected to the dual-power switching device, and the first voltage switch is connected to one end of the box-type transformer. This utility model improves the power supply reliability of wind farms, achieves efficient automated management, quickly responds to faults, reduces safety hazards, ensures stable operation, and promotes the intelligent transformation of the wind power industry.

The invention discloses a model prediction control method and system for a totem-pole PFC circuit, and belongs to the technical field of totem-pole PFC circuits, and the method comprises the steps: monitoring the input voltage of an AC power supply, the bus voltage of the totem-pole PFC circuit, and load demand information in real time; determining that the totem-pole PFC circuit works in a boost mode or a voltage-multiplying mode and driving signal distribution logic of each switch tube in the bridge circuit; calculating an optimal modulation ratio based on a model prediction control algorithm according to an error between the target bus voltage and the currently detected bus voltage; generating a first SPWM signal with a corresponding duty ratio and a complementary second SPWM signal according to the optimal modulation ratio; and distributing the first SPWM signal and the second SPWM signal to corresponding switch tubes to realize control of the bus voltage. According to the method, the SPWM duty ratio is dynamically adjusted through model prediction control, and rapid, accurate and stable control over the totem pole PFC bus voltage is achieved.