167results about How to "Prevent running away" patented technology

The invention relates to an intelligent power unit for a high-power converter device and a control method, used for a high-voltage frequency converter and a photovoltaic inverter. The frequency converter is formed by a plurality of power units, each phase of which is arranged in multiple layers, in series; each power unit is provided with a unit field programmable logic array FPGA and a single chip microcomputer unit STM32; the unit field programmable logic array FPGA and the single chip microcomputer unit STM32 are connected through a serial interface SPI; bus over-voltage detection, temperature measurement, bridge arm open-circuit and short-circuit state detection having flash lamp indication, pulse wide measurement and the like are connected to the inlet of the FPGA; the outlet is connected to a driving circuit; a main control system comprises a central data controller and a layer controller on the same mainboard; bidirectional transmission between the main control system and the FPGA is realized through two optical fibres; the two have communication state detection; transmission is carried out according to a specified time sequence; therefore, the anti-interference performance is high; the real-time performance of fault response is ensured; dead-time compensation in pulse width measurement is carried out according to the real waveform; the compensation precision is the highest; a variable-frequency motor is constant in waveform and steady in torque; a test result shows that: the communication speed is high; the synchronization performance is good; the reliability is high; performances are comprehensively optimized and intelligentized; the cost is low; and the intelligent power unit is used for the driving power supply of the variable-frequency motor and the power supply of the photovoltaic inverter.

The invention discloses an automatic control system of a multifunctional drying machine, which comprises a microprocessor, and a humidity sensor and a temperature sensor which are connected with the microprocessor, and is characterized by further comprising a humidity setting module, a temperature setting module, an optical coupler, a relay, a drying machine and a host computer, wherein the humidity setting module and the temperature setting module are respectively connected with the microprocessor, the host computer is connected with the microprocessor through a serial communication circuit, and the microprocessor is connected with the drying machine through the optical coupler and the relay sequentially. The automatic control system of the multifunctional drying machine can realize remote control, accurately control the humidity of an object to be dried, and control the temperature during the drying process, so that the dryness of the object reaches the preset value, a product is enabled not to be qualitatively changed under overhigh temperature, and the quality of the object to be dried is guaranteed.

The invention discloses a two-wheel drive type low-speed patrol car system and an operating method. The two-wheel drive type low-speed patrol car system comprises a two-wheel drive system, a front blind area detection and obstacle avoidance system, a rear blind area detection and obstacle avoidance system, an environment detection system and a central control system. By the front blind area detection and obstacle avoidance system, the rear blind area detection and obstacle avoidance system and the environment detection system, determining a position of a patrol car in real time and navigationare realized while whether surrounding obstacles exist or not is determined, and data are fed back to the central control system in real time to realize analytical processing; the central control system controls a two-wheel drive system to change an operating state of the patrol car to enable the patrol car to accelerate to pass through or bypasses obstacles, so that patrol normality of the patrolcar is guaranteed. By ARM controller and NUC computer combined dual-core control, operating stability and accuracy in navigation patrol of the patrol car are guaranteed, and the patrol car is suitable for regions under outdoor bumpy road conditions and emergency conditions.

The invention discloses a summer hat. The summer hat comprises a hat crown part which is arranged on the head of a user and a hat brim part which is used for blocking the face of the user, wherein the hat brim part is connected with the brim crown part, the surface of the hat crown part is provided with ventilation meshes, the top of the hat crown part is provided with a solar storage battery, a Velcro is sewn on the bottom edge of the hat crown part, a piece of rainproof fabric for preventing the head from being wetted by the rain is attached on the Velcro, the middle part of the hat brim part is provided with a hole, a fan is installed in the hole, and the fan is electrically connected with the solar storage battery. The summer hat has the advantages that the fan can be controlled by the solar storage battery to rotate so as to bring about coolness in summer, the rainproof fabric can prevent the head from being wetted by the rain, the ventilation of the hat crown part is strong, the junction between the hat brim part and the hat crown part is provided with a zipper, the summer hat is detachable and convenient to wash, a buckle is buckled on ears so as to prevent the hat from flying away, the edge of the hat brim part is provided with an LED (light emitting diode) lamp which is used for illumination, and not only practicability but also attractiveness can be realized.

The invention discloses a switching machine protecting circuit of a vehicle information system, which comprises a switching machine control circuit, wherein an input end of the switching machine control circuit is connected with an output end of an engine / generator and an output end of the switching machine control circuit is connected with a switching machine control signal end, the switching machine control circuit is powered by a storage battery and comprises a fast power-on circuit and a delay discharging circuit which are connected with each other in parallel between the output end of the engine / generator and the switching machine control signal end. The switching machine protecting circuit of the vehicle information system has the characteristics of fast power-on, delay discharging, high reliability, low standby current and low cost, and can be extensively applied to the field of electronic information system of vehicle.

The invention discloses a single-core low-speed two-wheeled picomouse sprint controller, comprising an STM32F4 controller, an L6207D chip, a cell, a first sensor, a second sensor, a third sensor, a fourth sensor, a gyroscope, a first motor, a second motor, a third motor, a current sensor and a vacuum apparatus. The STM32F4 controller and the L6207D chip are in signal connection; the signal emission direction of two sensors is the same with a wheel running direction, and the signal emission direction of the other two sensors and the wheel running direction form a certain angle; the gyroscope and the STM32F4 controller are in signal emission; two motors among the three motors are respectively in corresponding connection with two wheels of a two-wheeled picomouse, and the other motor is in connection with the vacuum apparatus. The controller increases an operation speed, constantly monitors and calculates running states of the picomouse, automatically regulates the ground adsorption capability of the vacuum apparatus, and completely avoids the skidding of the picomouse when sprinting with a high speed in a complex labyrinth.

The invention discloses a powdery solid fuel combustion and work application method and a powdery solid fuel combustion and work application device. Powdery solid fuel is input into an open cycle gas turbine system for combustion by utilizing an airtight helical feeder, and enters a gas turbine to be expanded and apply work to generate power, wherein the airtight helical feeder is provided with a device which prevents a high-pressure combustion gas from being leaked outwards from a combustor along a rotating shaft of a helical fin in an airtight shell.

The invention discloses a dual-core two-wheeled top-speed microcomputer mouse-based diagonal sprint servo system. The system comprises a sprint central control unit, a first motion driving unit, a second motion driving unit, a first high-speed direct current motor, a second high-speed direct current motor and a power supply unit, wherein the sprint central control unit comprises an ARM 9 (Advanced RISC Machine) processor and an FPGA (Field Programmable Gate Array) processor; the ARM9 processor is electrically connected with the FPGA processor; the FPGA processor is electrically connected with the first motion driving unit and the second motion driving unit respectively; the first motion driving unit is further electrically connected with the first high-speed direct current motor; the second motion driving unit is further electrically connected with the second high-speed direct current motor. According to the system, two processors are simultaneously adopted to work cooperatively to process data, so that the operation speed is higher, large current is prevented from being generated, and the influence of batteries on the high-speed sprint is reduced; a gyroscope can navigate for the turning of a microcomputer mouse, so that the stability for the microcomputer mouse is improved.

The invention discloses a glitch-free self-adaptive clock switching method for a UART (Universal Asynchronous Receiver Transmitter) interface chip. The glitch-free self-adaptive clock switching method for the UART interface chip comprises the flowing steps of (1) obtaining a next working state, namely, inputting the clock frequency and the baud rate of the UART interface chip through a self-adaptive clock switching module according to configuration information which is wrote in through a CPU (Central Processing Unit) in a parallel mode; (2) calculating the UART interface chip required mclk frequency; (3) comparing the required mclk frequency with clkin frequency, calculating the double frequency and opening a frequency doubler when the required mclk frequency is higher than the clkin frequency and closing the frequency doubler when the required mclk frequency is lower than the clkin frequency; (4) switching the chip mclk according to opening and closing of the frequency doubler. The UART interface chip comprises the self-adaptive clock switching module which is connected with a chip mclk. According to the glitch-free self-adaptive clock switching method for the UART interface chip, clock strategies of the chip is automatically adjusted and the purpose of optimizing power consumption is achieved according to a current working state of the UART interface chip and the next working state which is wrote in through the CPU.

A wearable patch (10) comprising an ultrasound transducer (30) mounted on the patch, the ultrasound transducer comprising a major surface for contacting the skin of a wearer of the patch, said major surface being covered by a layer (33) of a soluble adhesive precursor, the wearable patch further comprising a seal ring (40) extending from the patch, said seal ring surrounding the ultrasound transducer. Also disclosed are a wearable patch kit, assembly and application method.