37results about How to "Short connection" patented technology

The invention relates to a video monitoring system with an elevator invalid request signal removing function. Elevator waiting hall video acquisition modules are mounted in elevator waiting halls in each floor, and a car video acquisition module is mounted in a car. Images acquired are respectively transmitted to the elevator waiting hall video processing modules and a car video processing module. Whether people are in elevator waiting halls or in the car or whether the car is in full load conditions or not can be detected by comprehensively utilizing various image processing technologies such as human-body judgment and 'space full-load detection' technology. Further, processing results are transmitted to a CAN (controller area network) bus via a CAN module, and received by an invalid request processing module for further processing. For invalid requests, the invalid request processing module transmits removal commands to an elevator master controller, invalid stopping of the elevator in various conditions can be avoided, running efficiency of the elevator is improved and energy loss is reduced.

The invention provides a packaging device of a compact single-phase integrated drive circuit. The packaging device comprises wire-leading frame, a plurality of first chip paddles formed on the wire-leading frame, first grid electrode drive devices, second grid electrode drive devices, first upper arm transistors, first lower arm transistors, second upper arm transistors, second lower arm transistors, signal pins, and power pins, wherein each first grid electrode drive device, each second grid electrode drive device, each first upper arm transistor, each first lower arm transistor, each second upper arm transistor, and each second lower arm transistor are arranged on each first chip paddle, and each signal pin and each power pin are led from each first chip paddle and arranged oppositely on tow sides of the wire-leading frame. The invention further provides the single-phase integrated drive circuit, aims at solving the problems that drive circuit devices formed by discrete components are difficult in installation and poor in reliability due to large amount, and is particularly suitable for solving the problems that center distances of the pins are reduced due to the fact that packaging size is limited in integrated drive circuits, and thereof the pins are damaged with one another due to the fact that the center distances are not enough.

The invention belongs to the technical field of radio frequency communication and provides a high-stability low-noise GPS (Global Positioning System) active antenna for solving the problems of difficulty in miniaturization and high cost of a GPS active antenna in the prior art due to the adoption of discrete components. A circuit composition of the high-stability low-noise GPS active antenna comprises two low-noise amplifiers, a radio frequency band-pass filter, a low-noise LDO (Low Drop Out Regular), a reference source and a microstrip patch antenna. According to the invention, a module comprising the low-noise amplifiers, the reference source and the low-noise LDO is integrated into a low-noise amplifier chip by adopting an integration technology, the integral GPS active antenna is formed by adopting the band-pass filter and a small amount of peripheral circuits, the area of the active antenna is reduced, the cost is saved, the power consumption is reduced and the reliability and stability are improved. The GPS active antenna provided by the invention easily meets the requirement on the miniaturization and is particularly suitable for integrating functional modules of mobile communication products such as a mobile phone, a PDA (Personal Digital Assistant), a vehicle-mounted navigator and the like, into one system.

A street lamp adopting an LED light source comprises a lamp housing, a reflecting shade, a light-emitting port, a light-transmittable shade and an LED light source module, wherein the reflecting shade is arranged in the lamp housing; the light-emitting port is arranged on the lamp housing; the light-transmittable shade is arranged at the light-emitting port; the LED light source module is fixed in the reflecting shade, and comprises a first stamping sheet metal, a second stamping sheet metal, a third stamping sheet metal, a plurality of LED chips and a control circuit board; the LED chips are arranged on the second stamping sheet metal; the control circuit board is connected with the LED chips; the second stamping sheet metal is provided with a mounting port used for fixing the control circuit board; a plurality of openings for limiting an area with point fluorescent powder glue are formed on the third stamping sheet metal; the LED chips are stuck on the second stamping sheet metal in positions corresponding to the openings; and the first stamping sheet metal, the second stamping sheet metal and the third stamping sheet metal are fixed with one another through a connecting mechanism. The street lamp adopting the LED light source has the advantages of good heat dissipation performance, low cost and long service life.

The invention provides a bluetooth mouse for quickly switching a connection target, and discloses that: the mouse comprises a signal processing circuit and a control signal is generated according to the displacement amount of the mouse and the triggering of a button unit; the signal processing circuit is electrically connected with a bluetooth transmission device; a matched information storing device for storing the bluetooth transmission device and matched codes for establishing data transmission connection with one or more information processing systems are contained inside the mouse; the bluetooth mouse for quickly switching the connection target is characterized in that: the button unit sets one button or the combination of more buttons to trigger the signal processing circuit to generate a target switching signal; and the target switching signal drives the bluetooth transmission device to read a group of matched codes from the matched information storing device according to the displacement amount of the mouse so as to establish the data transmission connection with the information processing systems which correspond to the matched codes.

The invention discloses a multi-chip sharing power supply or ground structure used in a printed circuit board, which belongs to the technical field of circuit board noise suppression. The power supply or ground structure is a typical capacitor structure of which certain three layers are in metal-medium-metal structure and constructed in the multi-layer printed circuit board, wherein the used medium is a high dielectric constant medium; large area of power supply or ground metal plane is divided into areas with the same number according to the required power supplied chip number respectively, and each area is positioned under the chip supplied with power. Through embedding technology, namely the whole power supply/ground structure is a part of the circuit board, the structure has short wiring and small parasitic parameter, can work at high frequency, and greatly widens the high frequency property of a wave filter.

The invention relates to the technical field of micro-electronic chip packaging, and discloses a chip type wireless audio receiving and transmitting integrated system. A packaging shell and a substrate plate are matched to form standard appearance packaging, chips for collecting processing and transmitting audio signals are placed in the packaging shell, a paster is installed on the substrate plate, and the chips are electrically connected based on the bonding technology. The chips for collecting processing and transmitting the audio signals are integrated to the same PCB based on the SIP technology and are packaged to the packaging outer shell to form a micro integrated system with the audio signal collecting function, the audio signal processing function and the audio signal transmitting function. Compare with a traditional detectaphone, a micro type interceptor has the advantages of being small in size, low in power consumption, easy to hide and the like.

The invention relates to a power supply method of an LED display screen, comprising the following steps of: firstly, carrying out alternating current-direct current rectification conversion on alternating current from an external alternating-current power supply and transmitting high-voltage and direct-current power obtained by conversion to a high-voltage and direct-current power supply bus; and then, respectively carrying out direct current-direct current voltage transformation on the voltage of the high-voltage and direct-current power supply bus according to working voltage required for each power consumption module on the LED display screen, and respectively inputting the transformed voltage to the corresponding power consumption modules of the LED display screen. The invention also relates to a power supply system of the LED display screen. The invention can improve power supply efficiency, reduce losses and lowering cost, simplify the structures of the power supply system and an application system thereof, improve the running reliability of the system, reduce the installation space required for the power supply system, and is convenient for wiring.

The invention discloses a dual-voltage power supply. The dual-voltage power supply comprises a power input end, a power output end, a control transformer, a power supply control circuit and a voltage detection circuit, wherein a rectifier circuit and a voltage-doubling circuit are connected in series between the power input end and the power output end; the control transformer is connected with the power input end; the power supply control circuit and the voltage detection circuit are connected with the control transformer; the power supply control circuit comprises a first relay and a second relay, wherein the first relay is arranged between the power input end and the control transformer, and the second relay is arranged among the power input end, the rectifier circuit and the voltage-doubling circuit; the control transformer is provided with a 220V primary winding and a 380V primary winding; and the voltage-doubling circuit comprises two groups of capacitor-resistor circuits which are connected in series with each other. An inverter welding machine can be used in the places with a power supply of 380 V or 220 V very conveniently; a good radiating effect is achieved; the connection wires among the components are the shortest; and a rectifier board adopts an integrated output piece, so that the faults of the rectifier board are reduced.

The invention discloses an impact voltage generating device. The impact voltage generating device comprises a host computer, a body, a DC high voltage power source and an impact generation loop, wherein the DC high voltage power source comprises a transformer, a silicon stack and an output end, and the host computer is fixed in the body. The impact voltage generating device is characterized in that the DC high voltage power source employs the closed structure, the transformer and the silicon stack are fixed in the body, the DC voltage is transmitted by the output end to the impact generation loop, the impact generation loop is a modular structure composed of multi-level modules, and the modules in each level are fixed and connected in series through supporting insulators and fixing supports. The impact voltage generating device is advantaged in that the transmission overvoltage in the high voltage environment can be enhanced, and safety performance can be improved.

The embodiment of the invention discloses a user management method, a server and a computer readable storage medium. The method comprises the steps that the server acquires behaviors of audience clients in a live broadcast room; when the server detects that the behavior of the audience client conforms to a user management model, whether the network connection of the audience client is abnormal ornot is judged, wherein the user management model is a model generated according to malicious behaviors of a user; if so, the server detects the audience client side connected with the microphone through a long link heartbeat mechanism, and if it is detected that microphone connection between the audience client side and an anchor client side succeeds within a preset time interval, the server interrupts connection between the anchor client side and the audience client side. By implementing the method, the user management efficiency can be improved.

The invention discloses a method free of dead corners for connecting multifunctional kitchen and bathroom drainage pipes. The method comprises the following steps of S1 connecting a water dischargingconnecting port formed in the bottom end of a three-way cylindrical shell body with an external drainage device through an oriented drainage member; S2 connecting a side surface connecting port formedin the side surface of the three-way cylindrical shell body with a drainage pipe connecting member or other three-way cylindrical shell bodies; S3 connecting a top end connecting port formed in the top end of the three-way cylindrical shell body with the drainage pipe connecting member or other three-way cylindrical shell bodies. By the adoption of the method free of the dead corners for connecting the multifunctional kitchen and bathroom drainage pipes, the drainage pipes at various angles can be connected and flexibly turned, and drainage pipe diameters of all household appliances and equipment such as washing machines are satisfied.

The invention relates to an active noise reduction system, an adaptive calibration analog filter circuit and an earphone. The active noise reduction system comprises a microphone used for collecting environmental noise to generate a first audio signal; the first chip is used for preprocessing the first audio signal; an analog filter circuit and a second chip, at least part of the analog filter circuit is integrated on the second chip, and the analog filter circuit is used for carrying out filtering processing on the preprocessed first audio signal to form a de-noising signal with a phase opposite to that of the environment noise; the first chip is also used for receiving a second audio signal comprising the target audio, and mixing the second audio signal with the de-noising signal to forma mixed audio signal; and the loudspeaker is used for playing the mixed audio signal. According to the scheme, the number of devices installed on the circuit board is small, the space of the circuitboard is saved, product miniaturization can be achieved, parasitic parameters are reduced, time delay and power consumption can be reduced, and the signal-to-noise ratio can be increased.

The invention provides a power supply device. The power supply device comprises a power supply cabinet, a plurality of radiators, and a power conversion circuit, wherein the power conversion circuit is located in the power supply cabinet; the power conversion circuit comprises at least one of an alternating current-direct current conversion circuit and an alternating current-alternating current conversion circuit; the alternating current-direct current conversion circuit at least comprises a first rectification module, a first inversion module, a first filtering module, a first transformer anda second rectification module which are electrically connected in sequence; the alternating current-alternating current conversion circuit at least comprises a third rectification module, a second inversion module, a second filtering module and a second transformer which are electrically connected in sequence; the first rectification module, the first inversion module, the second rectification module and a first capacitor unit in the alternating current-direct current conversion circuit and the third rectification module and the second inversion module in the alternating current-alternating current conversion circuit are all located in the sealed chamber. The waterproof, moistureproof and dustproof functions can be achieved, core elements cannot be eroded and damaged even if the device isused in a severe environment, and the application range of the device is greatly expanded.

An air conditioner features that its temp sensor, the controller of temp sensor, display module and control chamber are collectively installed near to on the panel of air conditioner. Said display module is arranged in a recess on panel. The module of temp sensor and its control is installed in the window under the front exhaust opening. Its advantages are compact structure and short electric lines.

The invention relates to an air cushion type headbox air flow control system with a high-pressure fan for blowing air. The air cushion type headbox air flow control system solves the problems that in the prior art, a Roots blower is large in noise and maintenance amount, engine oil needs to be replaced and cleaned regularly, and environmental pollution is caused. The system comprises a control cabinet, a display, operation and control all-in-one machine is installed on a cabinet door of the control cabinet, a PLC is installed in the control cabinet, the display, operation and control all-in-one machine is connected with the PLC through an Ethernet port, a first liquid level pressure sensor and a second liquid level pressure sensor on a headbox are connected with the PLC, a high-pressure fan is connected with the PLC, and the high-pressure fan is connected with the PLC. A variable-frequency governor of the high-pressure fan is arranged in the control cabinet, the high-pressure fan is connected with the headbox, and the sizing pump motor and the frequency converter are connected with the PLC.