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125results about How to "Increase effective distance" patented technology

High-voltage direct current broadband domain corona current measurement system

The invention provides a high-voltage direct current broadband domain corona current measurement system. The high-voltage direct current broadband domain corona current measurement system comprises a sampling resistance sensor, an extra-high voltage local measurement unit, an optical fiber transmission unit, a safe location measurement unit and an upper computer. The sampling resistance sensor samples the corona current signals of a high-voltage direct current, and converts the corona current signals to voltage signals. The extra-high voltage local measurement unit collects the voltage signals, and optical signals are obtained through photovoltaic conversion. The optical signals are transmitted to the safe location measurement unit through the optical fiber transmission unit. The safe location measurement unit converts the optical signals to the voltage signals. The upper computer processes, stores and displays the voltage signals. The high-voltage direct current broadband domain corona current measurement system has the advantages of being wide in measured frequency range, strong in capability of resisting electromagnetic interference and the like and can have a long-term and stable operation under the environment of extra-high voltage direct current and under the condition of all kinds of bad natural environment conditions, and provides effective technical means for further research of high voltage direct current corona characteristics.
Owner:CHINA ELECTRIC POWER RES INST +2

Intelligent anti-lost system and method

The invention discloses an intelligent anti-lost system and method. The system comprises an anti-lost device, a Bluetooth communication module, an alarm module, a Wi-Fi module, a button battery and a central controller. The Bluetooth communication module, the alarm module, the Wi-Fi module, the button battery and the central controller are all arranged on the anti-lost device. The anti-lost device is connected and communicated with a mobile terminal through a communication protocol. In a short-distance monitoring condition, only a low-power Bluetooth working mode is started, and in a long-distance monitoring condition, the low-power Bluetooth working mode is preferentially started, and a Wi-Fi working mode is started when the Bluetooth communication range is exceeded or false alarms and alarm failure occur due to unstable signals, so that power is saved and the service life of equipment is prolonged, the effective distance of monitoring is increased, and the anti-lost device in a safe distance can be effectively and accurately monitored. In addition, when a distance between a mobile phone and the anti-lost device is beyond the safe distance, the alarming of the anti-lost device and the mobile phone end is supported at the same time, and the mentioned bidirectional alarm mechanism can comprehensively inform a user.
Owner:HUAZHONG NORMAL UNIV

Separated grid type embedded layer float grid nonvolatile storage unit and manufacturing method thereof

The invention relates to a separated grid type embedded layer float grid nonvolatile storage unit and a manufacturing method thereof. The storage unit comprises a semiconductor substrate, a source region, a drain region, a channel region, a float grid, a source electrode and a control grid. The float grid is below first insulated medium layers and fully embedded in the semiconductor substrate, a second insulated medium layer between the float grid and the semiconductor substrate is connected with the first insulated medium layers and fully enclosures the float grid. The float and the second insulated medium layer are positioned between the source region and the drain region, the second insulated medium layer is far from one side of the drain region and contacted with the source region, thechannel region comprises a first channel region which is arranged between the drain region and the second insulated medium layer along the surface of the semiconductor substrate and a second channelalong the surface of the second insulated medium layer to the source region, and first insulated medium layers are arranged between the float grid and the control grid as well as between the float grid and the source electrode, a part protruding levelly at the bottom of the source electrode is positioned above the first insulated medium layer, and a covering part is arranged in the direction vertical to the surface of the semiconductor substrate.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP

Indoor distribution antenna feeder operation visualization management system

The invention discloses an indoor distribution antenna feeder operation visualization management system. A base station/repeater and an antenna feeder visualization system host machine are respectively connected with an RFID multi-frequency combiner which is connected with a mobile communication combiner. A mobile communication indoor distributed antenna is connected with the mobile communication combiner. An RFID electronic chip is connected with the mobile communication indoor distributed antenna. A network management center is connected with the antenna feeder visualization system host machine. The GSM/GPRS MODEM module of the antenna feeder visualization system host machine is connected with a monitoring control module. A radio frequency modulation and demodulation module is connected with a radio frequency output port. An RFID encoder is connected with the radio frequency modulation and demodulation module. The RFID encoder and the GSM/GPRS MODEM module are respectively connected with a communication interface module. According to the system, a mobile communication indoor distributed passive device can be monitored, the effective distance of passive radio frequency identification is extended effectively, and the system is easy and convenient.
Owner:ZUNYI BRANCH OF CHINA MOBILE GRP GUIZHOU COMPANY +1

Flow-equalizing ventilation device

The invention discloses a flow-equalizing ventilation device, which is characterized by simple and convenient operation. The flow-equalizing ventilation device comprises a plurality of air openings arranged on a ventilation pipeline, wherein the ventilation pipeline comprises an opened end and a closed end, one air opening closest to the closed end of the ventilation pipeline belongs to the first group, other air gaps belong to the second group, windward sections of all the air openings are parallel to the section of the ventilation pipeline, a flow limiting device is arranged at least on each air opening in the second group and is specifically arranged on the other end corresponding to the end of the windward section; and the number of the opened flow limiting devices of the air openings arranged on the ventilation pipeline sequentially increases or decreases as the distance from the flow limiting devices to the farthest position of the closed end of the ventilation pipeline decreases gradually. The quantity and speed of airflows can be adjusted by adjusting the number of the opened flow limiting devices so as to realize uniform air supply and uniform air discharge, and simultaneously, the flow-equalizing ventilation device with simple and convenient operation can realize uniform air supply and discharge via simple adjusting and flow limiting devices.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD

Distribution line fault indicator based on wireless ad hoc network

The invention discloses a distribution line fault indicator based on a wireless ad hoc network; the fault indicator comprises an acquisition unit and a gather unit; the acquisition unit comprises a data acquisition module, a first main control module and a first wireless ad hoc network communication module; the data acquisition module is connected with the first main control module; the first maincontrol module is connected with the first wireless ad hoc network communication module; the gather unit comprises a second wireless ad hoc network communication module, a second main control moduleand a wireless cellular network communication module; the second wireless ad hoc network communication module and the wireless cellular network communication module are respectively connected with thesecond main control module. The fault indicator uses the wireless ad hoc network communication modes to solve the long distance data transmission failing problems, thus increasing the fault indicatordetection valid distance; the fault indicator allows work personnel to handle the power grid operation states from the main station, and obtains the fault alarm information of the distribution line,thus monitoring the distribution line and locating faults online.
Owner:北京三清互联科技股份有限公司

Intelligent street lamp wireless control system and method thereof

The invention discloses an intelligent street lamp wireless control system and a method thereof. The system comprises a plurality of node units including synchrotimers, wireless devices, and controllers. The synchrotimers are used for carrying out time synchronization on the node units so as to enable time of all the node units of the system to be synchronized. The wireless devices consist of wireless receivers and/or wireless emitters. And the controllers are used for controling the wireless receivers to send wireless signals. The system uniformly sets emission time points of wireless signals in a period as well as sets emission contents or emission types of all the emission time points; and the different wireless signals are distinguished by the different emission time points. According to the invention, a transmission distance of a signal is substantially extended by a forwarding relay and an effective distance of a system signal can be improved. Besides, a current mode of single emission by one machine is changed into a mode of multiple emission by multiple machines, so that the stability of the system can be substantially improved and anti-interference capability can also be substantially improved; and moreover, emission time and emission contents are uniformly regulated, so that accurately synchronized and parallel operation of system signals can be realized.
Owner:徐大江

Method for improving profile of side wall of grid electrode, and semiconductor device manufacturing method

The invention provides a method for improving the profile of a side wall of a grid electrode, and a semiconductor device manufacturing method. The method for improving the profile of the side wall of the grid electrode comprises the steps: covering the surface of a formed side wall layer with a protection layer, wherein the protection layer covers the side wall layer, thereby enabling the surface of a semiconductor substrate to tend to be flat; carrying out the vertical etching of the protection layer through employing the punchthrough etching technology with the high etching selection ratio of the side wall layer and the protection layer, so as to remove a part, located on a top plane of a grid structure, of the protection layer, and keep the parts located on side walls and an inclined shoulder of the grid structure; enabling the protection layer on the inclined shoulder to be able to protect the side wall layer below the protection layer in a process of forming the side wall through the partial etching of the side wall layer, thereby reducing the etching loss of a side wall material on the inclined shoulder, and finally obtaining the side wall with the width uniformity. The side wall can increase the effective distance between a contact hole, sequentially formed in a source / drain region, and the grid structure, improves the effect of ion injection of the source / drain regions, solves problems of threshold voltage and leaked current of a device, and improves the performance of the device.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP

Injection molding machine capacity acquisition system

The invention relates to the field of information acquisition, and in particular to an injection molding machine capacity acquisition system which comprises a data acquisition device, a processing device, a remote control terminal and a communication device, wherein the data acquisition device is used for acquiring various parameters of an injection molding machine, and environment parameters; the processing device is used for processing acquired data; the remote control terminal is adopted for remote control; the communication device is used for enabling the processing device to communicate with the remote control terminal; the data acquisition device comprises an acquisition card which is connected with an injection molding machine PLC and used for acquiring various data, a calibration module for calibrating an acquisition module, a display for displaying acquired data in real time, buttons for setting parameters of the acquisition card, and a power supply for supplying power. The injection molding machine capacity acquisition system is good in data processing property, high in acquisition precision, good in timeliness, low in operation cost and convenient in large-scale popularization and application.
Owner:东莞市罗数基础工业科技有限公司

Automatic assembly equipment of precise infusion device

The invention discloses assembly equipment of a precise infusion device, in particular automatic assembly equipment of the precise infusion device. The automatic assembly equipment mainly consists of a loading part for finishing automatic loading of a filter, a liquid inlet guide pipe and/or an infusion guide pipe, and an assembly and unloading part for automatically finishing automatic assembly of the filter, the liquid inlet guide pipe and/or the infusion guide pipe. The automatic assembly equipment solves the technical problem of improving the production efficiency of the precise infusion device, needs no manual operation in the process of finishing insertion assembly of the filter and the liquid inlet guide pipe or the infusion guide pipe on the whole precise infusion device, and is high in automation degree and assembly production efficiency; meanwhile, compared with such problems as easiness in generation of fatigue and easiness in deformation in operation under the condition of long-time work by assembly staff, the automatic equipment has the advantages of efficient, stable and continuous work under the long-time high-strength environment; and finally, the automatic assembly equipment of the precise infusion device, provided by the invention, effectively solves the economic problem of high enterprise labor cost output.
Owner:梁启明

Automobile automatic driving auxiliary device

The invention discloses an automobile automatic driving auxiliary device, and relates to the information acquisition technology of the automobile automatic driving technology field. In order to enable an automatically driven automobile of acquiring hidden information shielded by obstacles, rain, snow, fog, and so on in a better way, and preventing the shielding of the communication between the automatically driving automobiles by the obstacles, the invention adopts the following measures that a radio receiving and transmitting device is disposed on the automobile, and is connected with an automobile computer; the automobile computer is connected with a satellite positioning signal receiving device, and is used to send the driving operation information and the position information of the automobile out, and is used to receive the position information and the operation information of other automobiles by the radio receiving and transmitting device, and then a decision basis is provided for the driving of the automobile. The automobile automatic driving auxiliary device is advantageous in that the automatically driven automobile adopts the radio communication technology, and therefore the information acquisition of the automatically driven automobile is not shielded by the obstacles, and the information acquisition range is enlarged.
Owner:胡达广

Box type transformer station current-carrying fault prediction system and application thereof

The invention discloses a box type transformer station current-carrying fault prediction system. The system comprises a process layer, an interval layer and a station control layer, wherein the process layer is internally provided with a box type transformer station online monitoring terminal, the box type transformer station online monitoring terminal is connected with a wired temperature measurement module temperature measurement point, and the box type transformer station online monitoring terminal is also connected with a wireless temperature measure module temperature measurement point through a wireless personal area network; the interval layer is internally provided with a box type transformer station online monitoring IED, and the box type transformer station online monitoring IED is connected with the box type transformer station online monitoring terminal; and the station control layer is internally provided with a station end monitoring unit, and the station end monitoring unit is connected with the box type transformer station online monitoring IED. The invention further discloses an application method of a box type transformer station current-carrying fault prediction system. The box type transformer station current-carrying fault prediction system and the application thereof can monitor temperature change of contacts in an online mode and can also accurately position contacts with faults or hidden risks.
Owner:西安金源电气股份有限公司
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