41results about How to "Convenient automatic switching" patented technology

The invention discloses a content distribution network CDN fault locating method. The method comprises the following steps: obtaining two-way detection data between a source station and a CDN cache server; judging the two-way detection data one by one according to preset abnormality judgment conditions, and marking a judgment result for each data; and performing analysis and fault locating on alltwo-way detection data and judgment results. The invention provides a health degree evaluation mechanism of two-way detection of a parent cache and the source station, which can automatically locate the fault position when the CDN parent cache fails to get the content at the source station.

A mobile device that supports a plurality of SIM profiles each corresponding to a different wireless network, measures a current network quality of a first wireless network and obtains network quality information for a second wireless mobile peer device as measured by the mobile peer device. The mobile device switches from the first wireless network to the second wireless network based on the obtained network quality information from the mobile peer device and based on the current network quality of the first wireless network by the mobile device. The network quality measurement received from the mobile peer device is provided through a wireless peer to peer communication link such as a Bluetooth link or other suitable non-internet protocol peer to peer communication link. The mobile peer device also supports a plurality of SIM profiles. Corresponding methods are also described.

The invention discloses a student learning ability evaluation method based on artificial intelligenceinvention, andn specifically relates to the technical field of learning testing. A server for receiving and processing data is included, the output end of the server is connected with a knowledge point example learning module for students to learn current knowledge points, a question setting modulefor giving test questions corresponding to the knowledge points, an answering module for the students to answer questions corresponding to the test questions, and a comprehensive evaluation module for evaluating answering and time consumption of the students. The output end of the question setting module is connected with a test question switching module for automatically switching test questions. According to the invention, answer right and wrong judgment is carried out through the right and wrong judgment module, the answer timing module carries out answer time timing, the answer evaluationmodule carries out answer ability evaluation conveniently, the time consumption evaluation module carries out time consumption ability evaluation conveniently, the comprehensive evaluation module carries out evaluation on knowledge learning ability of students conveniently, the evaluation accuracy is high, and the teaching quality is improved.

The invention relates to a drawer opening mechanism; the drawer opening mechanism is arranged between the cabinet body (1) and a drawer (2) of a disinfection cabinet, and is characterized by comprising a screw rod (3) which is located relative to the side wall of the cabinet body (1) and is arranged along the drawing and pulling direction of the drawer (2), a guide rod (7), and a nut (31) and a sliding table (4) which are in threaded connection with the screw rod (3); the sliding table (4) can be slidably arranged on the guide rod (7) in a sliding manner; the sliding table (4) is in driving connection with the drawer (2); the sliding table (4) can be slidably connected with the nut (31); a clutch mechanism (9) used for controlling the linkage between the nut and the sliding table is further arranged between the nut (31) and the sliding table (4); and a motor (6) is in driving connection with the screw rod (3). The manual mode and the automatic mode of the drawer opening mechanism can be freely switched, the structure is compact, and the drawer opening mechanism can be installed in a narrow space.

The invention discloses an infusion device for neurology nursing. The infusion device comprises a supporting rod, a controller and a micro stepping motor, the controller is arranged on the outer surface of the front end of the supporting rod, the top end of the supporting rod is sleeved with a fixing pipe, a connecting pipe is arranged at the top end of the fixing pipe, and hooks are evenly arranged on the outer surface of the connecting pipe; the bottom end of the supporting rod is sleeved with a liquid separation box, a funnel is arranged at the bottom end of the liquid separation box, a second leather plug and a limiting ring are arranged on the inner side of the funnel, first leather plugs are evenly arranged on the outer surface of the liquid separation box, the micro stepping motor is arranged on the inner side of the supporting rod, and the output end of the micro stepping motor is sleeved with a transmission gear. The outer surface of the transmission gear is sleeved with a switching disc, and the outer surface of the switching disc is sleeved with a fixing frame. On the basis of the Internet of Things technology, an automatic switching mechanism is adopted, automatic switching of infusion bottles is facilitated, and infusion work is more convenient.

The invention relates to the technical field of equipment cabinet heat dissipation and discloses an equipment cabinet liquid cooling system, which comprises a plurality of equipment cabinets, whereinheat dissipation cabinets is arranged on the back sides of the equipment cabinets; a cooling coil is arranged in a cooling chamber; the cooling chamber is filled with a heat conductive medium; the lower end of the cooling coil on each equipment cabinet is connected to a main water inlet pipe through a branch water inlet pipe; the upper end of the cooling coil on each equipment cabinet is connectedto a main water outlet pipe through a branch water outlet pipe; and a water pump is disposed on the main water inlet pipe. The equipment cabinet liquid cooling system further comprises a double watersource heat pump which includes a condenser and an evaporator, wherein a return pipe is connected between the water outlet end of the main water outlet pipe and the water inlet end of the main waterinlet pipe, passes through the evaporator, and is provided with a valve A; a water tank is arranged between the return pipe and the main water inlet pipe; a valve B is arranged between the water tankand the main water inlet pipe; a valve C is arranged on the water inlet end of a hot water pipe; valves D are arranged on the branch water inlet pipes of respective equipment cabinets; and a valve E is arranged at the water inlet end of a cold water pipe. The equipment cabinet liquid cooling system has high heat dissipation efficiency and good dustproof performance.

The invention relates to a DRM (digital radio mondiale) digital amplitude modulation broadcast receiver. The DRM digital amplitude modulation broadcast receiver comprises a casing, wherein a broadcast receiving circuit, a power supply unit and an output unit are arranged in the casing; the broadcast receiving circuit comprises a tuner, a priority module, a low-pass filter, an A/D converter, an OFDM (orthogonal frequency division multiplexing) modulator, a synchronous demodulator, a channel estimation module, a channel equalization module, a channel decoder, a demultiplexer, an audio decoder and a data decoder. The DRM digital amplitude modulation broadcast receiver can be taken as a digital receiving end of a digital AM transmitting system, low-cost tele-medicine and distance education, is particularly applied to receiving of digital AM emergency broadcast, and provides a sole low-cost radio digital audio and teletext broadcast for wide-range relief work.

The invention discloses an extended-range foldable electric scooter. The extended-range foldable electric scooter comprises a frame, a front steering wheel and a rear electric driving wheel; the framecomprises a front frame, a middle frame and a rear frame which are hinged with each other in sequence; a frame folding front connecting rod is arranged between the front frame and the middle frame; the two ends of the frame folding front connecting rod are correspondingly hinged with the front frame and a slide block; the slide block is connected with the middle frame through a locking mechanism;a frame folding rear connecting rod is arranged between the middle frame and the rear frame; the two ends of the frame folding rear connecting rod are correspondingly hinged with the slide block andthe rear frame; a seat cushion tube column is hinged on the rear frame; a seat cushion is mounted at the upper end of the seat cushion tube column; the seat cushion tube column is linked with the middle frame through a connecting rod folding and unfolding mechanism; an article carrying plate is also hinged on the rear frame; and the article carrying plate is connected with the middle frame throughan article carrying plate pull wire. The extended-range foldable electric scooter can be used for a user to stand and straddle during running, can realize automatic conversion among a standing running state, a straddling running state and a towing running state and can also realize an article carrying function.

The invention discloses an auxiliary power supply of a bidirectional energy storage inverter. The auxiliary power supply is composed of a first alternating-current circuit breaker, a second alternating-current circuit breaker, a bidirectional silicon controlled rectifier, a UPS power supply, an alternating-current relay, an inverter unit and a control system. The bidirectional silicon controlled rectifier is connected between the first alternating-current circuit breaker and the inverter unit; the second alternating-current circuit breaker and the UPS power supply are connected between the bidirectional silicon controlled rectifier and the inverter unit; the UPS power supply is connected with the alternating-current relay and the control system; and the inverter unit is connected with the second alternating-current circuit breaker and the control system. According to the auxiliary power supply provided by the invention, modularization of the auxiliary power supply is realized and thus maintenance and replacement can be carried out conveniently; and an automatic switching circuit can switch various working modes for the bidirectional energy storage inverter automatically. Meanwhile, the auxiliary power supply also adapts to occasions with extreme conditions, wherein the occasions include one with power exhausting of the UPS power supply due to self discharging.

The invention discloses a quick-change clamp switching frame without manual operation. The quick-change clamp switching frame comprises a standing automatic switching device and a clamp, wherein the standing automatic switching device comprises a support, a first limiting block, positioning air cylinders, a supporting air cylinder, cushion blocks and two guide grooves; the supporting air cylinderis arranged in a supporting air cylinder mounting cavity, and the piston end of the supporting air cylinder is horizontally arranged and faces one positioning air cylinder; the piston end of the supporting air cylinder is connected with a horizontal rectangular frame, and the rectangular frame is provided with the cushion blocks corresponding to two supporting plates correspondingly; and the clampcomprises a clamp body, a roller assembly and a second limiting block matched with the first limiting block. According to the switching frame, the clamp is switched through the standing automatic switching device, so that the problem that clamps of different vehicle types or different parts in the same vehicle type in a welding station are difficult to switch is solved, the switching efficiency is improved, and the overall production efficiency is effectively guaranteed.

The invention discloses a water quality image acquisition and information transmission system and method based on an underwater acoustic communication unit network, and belongs to the field of underwater information acquisition and communication. The system comprises a water quality sensor, a serial port camera, a serial port distributor, an underwater acoustic communication machine, a 5V/1A lithium battery, a 24V/4A lithium battery and an RS232 interface cross line, wherein the communication machine is connected with the input end of the distributor, the sensor and the camera are connected with the output end of the distributor through cross lines, and the communication machine, the sensor, the camera and the distributor are powered by the lithium battery. According to the invention, communication protocols are connected in a program, the types of transmitted data are judged according to the formats of the three communication protocols, and then corresponding data formats are added ordeleted, so that the data are transmitted again in equipment with the corresponding data formats. Finally, the function of inquiring the water quality and the image condition thereof can be realizedon the communication machine terminal.

The invention discloses a shadowless lamp for an operation. The shadowless lamp comprises a shadowless lamp body, a connecting frame and a supporting device, wherein handle is arranged in the middle of the shadowless lamp body; the connecting frame comprises a lamp holder handle, the lamp holder handle is connected with one end of a first connecting column, the other end of the first connecting column is connected with the lower portion of an operation box, the upper portion of the operation box is connected with one end of a second connecting column, the other end of the second connecting column is connected with one end of a transverse rod, the other end of the transverse rod is connected with one end of a vertical rod, and the other end of the vertical rod is connected with the supporting device; and the supporting device comprises a base, supporting frames are symmetrically arranged on the base, a plate body is arranged on the base, and sucker devices are symmetrically arranged on the two sides of the plate body. The shadowless lamp is simple in structure and convenient to operate. According to the invention, a voltage stabilizing box is designed in the shadowless lamp, so the shadowless lamp can be conveniently and automatically switched between an alternating current power source and a standby power source. The supporting stability of the position and posture supporting of the shadowless lamp can be improved through the supporting device, and meanwhile, position and posture adjustment is more convenient.

The invention relates to the technical field of internet and discloses a commodity price switching method and system. The commodity price switching method comprises the steps of presetting a plurality of price databases, wherein the price databases store prices of commodities in business modes; obtaining a price database corresponding to a to-be-switched business mode according to the received to-be-switched business mode; and obtaining the price of each commodity from the price database corresponding to the to-be-switched business mode. The invention furthermore provides a commodity price switching system which comprises a plurality of the price databases, a price switching unit and a price obtaining unit. Through the method and the system, the price of each commodity is switched to the price in another price database from the price in one price database when the price needs to be adjusted, and the operation is relatively simple and quick, so that the prices of the commodities can be simultaneously adjusted, the price adjusting operation does not need to be manually performed, and the labor cost is reduced.

The invention discloses an automatic simulation test method for port impedance, which comprises the following steps of: sequentially applying voltage to each port of a tested circuit, solving corresponding port current, and further calculating the equivalent impedance of each port according to the Ohm law. The port impedance automatic simulation test method comprises the following steps: firstly, setting an active device in a tested circuit to be zero, and distributing a unique and fixed network identification number to each terminal of the tested circuit; then, listing a test sequence according to test requirements; and furthermore, introducing an independent voltage source specially used for measuring circuit port impedance into the circuit simulation diagram, and distributing network identification numbers to positive and negative terminals of the circuit simulation diagram according to a test sequence. Through matching network identification numbers of the independent voltage source terminal and the tested circuit terminal, electrical connection is realized. According to the invention, the efficiency of obtaining the impedance value is improved. Meanwhile, errors caused by manual analysis or calculation errors are avoided, and the accuracy of the obtained port impedance value is improved.