399 results about "Telecommunications engineering" patented technology

The invention relates to an intelligent distribution automation communication system for a power grid. The intelligent distribution automation communication system consists of communication networks among a main station layer, a sub-station layer and a terminal layer. The intelligent distribution automation communication system has the main technical characteristics that the main station layer is connected with the sub-station layer through an SDH (Synchronous Digital Hierarchy) optical fiber communication network, the sub-station layer is connected with the terminal layer through optical fibers, and communication terminal equipment of the terminal layer is connected with distribution transformer terminals through Ethernet, wireless or carrier communication manners. According to the intelligent distribution automation communication system, a backbone communication network is formed by using an EPON (Ethernet Passive Optical Network) optical communication technology, and carrier and wireless communication manners are adopted to supplement relatively-dispersive terminal sites where optical cables are hard to be laid, so that an effective solution for the implementation of distribution automation communication engineering of central urban is provided. The intelligent distribution automation communication system has the characteristics of small investment, convenience in implementation, strong practicability, low cost, flexibility in networking, and the like, the difficulty that the optical cables are hard to be laid in large scale in central urban of cities is solved, and a basic guarantee is provided for the efficient transmission of information flow.

The invention relates to a filtering method for cut-over warning in a mobile communication engineering, which is improved based on a warning system of a current communication network administrator. The main improved point of the invention is that a set of universal filtering methods for cut-over warning of the mobile communication engineering aiming at the equipment in different professions and manufacturers is put forward on the basis of the current warning and resource configuration management function of the communication network administrator and by rearranging and classifying the resource state attribute in the communication network administrator of an equipment network element. The filtering method of the invention has the advantages of being capable of filtering the warnings taking up 30 percent of total warning amount produced in the process of engineering debugging, thereby avoiding and reducing invalid, simple and repetitive labor of maintenance personnel and improving working efficiency of transportation and maintenance.

The invention belongs to the field of estimation and protection of electromagnetic interference in communication engineering, and particularly relates to a method for estimating the crosstalk magnitude, caused by electromagnetic interference of an external transient state, of a PCB microstrip transmission line, wherein the method is for estimating the size of transient state response of a PCB which works normally when the PCB is interfered by external sudden electromagnetic pulses in study of the integrity of PCB microstrip line signals under complex electromagnetic environments in space. The method comprises the steps that a coupling model between a PCB microstrip line and transient state electromagnetic interference in the air is established; the coupling between the PCB microstrip line and the transient state electromagnetic interference in the air is calculated according to the coupling model between the PCB microstrip line and the transient state electromagnetic interference in the air; coupling voltages are added to the microstrip transmission line, and discretization is carried out on a transmission line equation by utilizing an FDTD method; simulation is carried out on a crosstalk equation after discretization by utilizing Matlab, and a crosstalk result is obtained. According to the method for estimating the crosstalk magnitude, caused by the electromagnetic interference of the external transient state, of the PCB microstrip transmission line, the crosstalk of spacial electromagnetic interference on the PCB microstrip line is calculated through a simple method, calculation amount is reduced, and efficiency is improved.

A single line bidirectional communication method of a reconfigurable controller belonging to the technology field of communication engineering is provided. Through upper computer interface conversion module, the invention transforms positive and negative logical signals of serial communication into difference voltage signal and sends to a signal processing module, wherein, a microprocessor is for processing and responding to delivered message protocol, conversely, the information can also be sent from reconfigurable controller to the upper computer, and the delivered message protocol can be responded by the upper computer, during responsion, corresponding operations are executed according to different operating commands, the commands comprise starting parameterization, reading erasable memorizer operation, writing erasable memorizer operation, whole piece erasure operation of the erasable memorizer, stopping parameterization; during the operation execution, the communication state is displayed in real-time according to real-time communication state. By utilizing the characteristic of single line communication in the invention, wire harnesses are reduced for more than a half than universal serial or other wired communication, thereby realizing the stability of information interaction and data transferring of each numerical module.

The invention discloses an electric power communication engineering cable laying device which comprises a base, a first supporting plate, a second supporting plate, a guide roller mechanism and a guide mechanism. The guide roller mechanism and the guide mechanism are sequentially arranged according to the moving direction of a cable; one end of the first supporting plate is arranged on the upper surface of the base, and the second supporting plate can move up and down along the first supporting plate; the guide roller mechanism comprises two guide rollers and a guide roller frame, the guide roller frame is fixedly arranged on the upper surface of the second supporting plate, the guide rollers are rotatably mounted on the guide roller frame, and a gap allowing a cable to penetrate through is formed between the two guide rollers; the guide mechanism comprises two guide wheels and a guide wheel frame, the guide wheel frame is fixedly arranged on the upper surface of the second supportingplate, the guide wheels are rotatably installed on the guide wheel frame, and a gap allowing a cable to penetrate through is formed between the two guide wheels. When cables are laid, the cables are not easy to abrade and pull apart.

The invention belongs to the technical field of cable extending and retracting, in particular to a communication cable winding and unwinding device for communication engineering. The communication cable winding and unwinding device comprises a winding roller, wherein an L-shaped winding support is movably in sleeve connection with the outer cylindrical surface of one end of the winding roller; a limit disc is fixed to the outer cylindrical surface of one end of the winding roller in a sleeve connection manner, and is located at one side of the L-shaped winding support; and a fixed disc is fixed to the outer cylindrical surface of the other end of the winding roller in a sleeve connection manner. According to the communication cable winding and unwinding device, a rotating shaft is rotatably connected to the interior of the winding roller, and the rotating angles of supporting rods can be adjusted on the rotating shaft through a spiral thread II and a spiral thread III which are reversely arranged, so that the distance between a plurality of supporting plates and the winding roller can be adjusted, and thus, the communication cable winding and unwinding device is suitable for cablerolls of different diameters; and when the communication cable winding and unwinding device is used for winding and unwinding relatively short cables, the number of turns of the limit disc rotation isreduced during the winding and unwinding of the cables. The winding and unwinding efficiency of the communication cable winding and unwinding device for the relatively short cables is effectively improved.

The invention relates to a GPRS based wireless smart home system, in particular to improvement of smart home system, belonging to the filed of communication engineering. The invention provides a wireless smart home network, capable of transmitting Internet data within home and connecting various home appliances. The invention comprises an internal home network system, a smart home controller and a smart home network, data communication is carried out between the smart home network and an external Internet network, and the smart home controller is one important part of the smart home network and has the functions of core management and control and communication with the external network.

The invention discloses a well lid lifting device for computer and communication engineering construction. The well lid lifting device for computer and communication engineering construction comprisesa support, a transmission wheel, a drive wheel, a suction disc, a location block and a transversal plate, wherein a main rod is arranged at the lower side of the support, and a rotary shaft is arranged at the right side of the support; a rolling wheel is arranged at the right side of the rotary shaft, and a rope is arranged on the rolling wheel; a bearing is arranged at the left side of the transmission wheel, and a belt is arranged at the lower side of the transmission wheel; the drive wheel is fixedly connected with a stepper motor, and a support rod is arranged at the lower side of the stepper motor; and a fixed frame is arranged at the lower side of the support rod. The well lid lifting device for computer and communication engineering construction is reasonable in structural arrangement, achieves the effect of saving the labor of a user, solves the problem that the labor of the user is increased due to manual lifting of the user in an existing manner of lifting a well lid, and iscapable of better ensuring the efficient working of the well lid lifting device, and promoting the development of the electric power industry.

The invention relates to the field of communication engineering, in particular to a cable take-up and pay-off device capable of compressing a cable for communication engineering. The cable take-up andpay-off device comprises a base, a mounting frame is arranged at the upper end of a vertical plate, first electric telescopic mechanisms are bilaterally symmetrically arranged on the mounting frame,and compressing mechanisms are arranged at the lower ends of the first electric telescopic mechanisms; and each compressing mechanism comprises a connecting plate connected with the lower end of the corresponding first electric telescopic mechanism, a pressure sensor is arranged on the lower side of each connecting plate, a supporting plate is arranged at the lower end of each pressure sensor, telescopic rods are arranged on the lower side of the supporting plate in a bilateral symmetry mode, springs are arranged on the outer sides of the telescopic rods, pressing seats are arranged at the lower ends of the telescopic rods, a cavity is formed in the lower side of each pressing seat, and a pressing roller is connected into each cavity through a rotating shaft. By means of the structural arrangement of the device, the cable can be compressed in real time when the cable is wound and unwound, the cable is prevented from being wound loosely, and the cable winding and unwinding quality and winding and unwinding efficiency are guaranteed.

The invention discloses a multi-core cable detector, which is composed of an oscillation circuit, a counting circuit, multi-core cable detection terminals, a detection indication lamp and a power supply circuit. The detector is capable of detecting on and off of a clustering lead or a multi-core cable and is capable of carrying out collation on wire sizes of two ends of the clustering lead or the multi-core cable. According to the invention, the detector has advantages of small volume, light weight, simple operation, convenient usage, rapid and accurate inspection and low power consumption and the like; and the detector is applicable to a wide variety of fields such as an automatic control device, communication engineering, a network, an electrical instrument and the like.

The invention discloses a heat dissipation and ventilation type power distribution cabinet for communication engineering, and relates to a power distribution cabinet. The power distribution cabinet comprises a cabinet body. A horizontal fixing plate is fixedly connected to the inner side of the cabinet body; a motor is fixedly connected to the upper left portion of the horizontal fixing plate; theoutput end of the motor runs through the cabinet body and is connected with a rotary disc; the right side of the rotary disc is rotationally connected with a transmission swing rod; the right side ofthe transmission swing rod is rotationally connected with a transmission toothed bar; guide supports are fixedly connected to the bottom in the cabinet body in a bilateral symmetry mode; the transmission toothed bar is slidably connected with the guide supports; a first longitudinal shaft is rotationally connected to the left side of the horizontal fixing plate; and a first transmission gear is fixedly connected to the bottom of the first longitudinal shaft and engaged with the transmission toothed bar. The cabinet is simple in structure, is driven by the motor during use, achieves the reciprocating rotation of the rotating guide ring through the transmission of the transmission toothed bar, can guide air to different positions, reduces the temperature of air in the cabinet body to the maximum degree, can accelerate the inflow of air flow through the cooperation with spiral fan blades, and is better in cooling effect.

The invention discloses a wall-mounted router for communication engineering convenient for dismounting. The wall-mounted router comprises a base, a first groove is formed at the top of the base, a mounting seat is arranged at an inner cavity of the first groove, deep grooves are formed at two sides of the inner cavity of the first groove, necks are formed at two sides of the mounting seat, and thenecks are communicated with deep grooves; clamping blocks are arranged at the inner cavities of the necks, support columns are arranged at the inner cavities of the deep grooves; and one side of eachsupport column extends to the inner cavity of the neck. Through the cooperative use of the base, the first groove, the mounting seat, the deep grooves, the necks, the clamping blocks, the support columns, the second groove, a first spring, a transmission rod, a hand wheel, a second spring and a router body, the wall-mounted router can be conveniently and quickly dismounted and mounted, the time consumed by the worker is reduced, and the great convenience is brought for the dismounting and the mounting, and the practicability of the router is enhanced.

The invention discloses a cable bridge used for computer communication engineering with a good shock absorption effect. The cable bridge includes an upper cover, a shell body, rubber gaskets, a support plate and a bridge body; the upper cover is mounted above the shell body; buffer springs are mounted inside the upper cover; a connecting rod is mounted on the front end of each of the buffer springs; main buffer springs are installed in the middle pottion of the side wall of the shell body; the bottom of the shell body is provided with grooves; damping springs are disposed inside the grooves; guide rods are mounted inside upper ends of the damping springs; the upper ends of the guide rods are fixed on a bottom plate of the support plate; the bridge body is placed above the support plate; and the upward side of the bridge body is covered with a bridge cover. The cable bridge used for the computer communication engineering with the good shock absorption effect adopts the curved rubber gaskets made of rubber, both ends of each of the rubber gaskets are fixed on a side plate by screws, and the main buffer springs and auxiliary buffer springs on both sides are disposed inside the rubbergaskets, and so, a good elastic shock absorption effect is produced, and the shock absorption effect on the both sides is improved.

The invention discloses a cable take-up drum for computer communication engineering construction. The cable take-up drum for computer communication engineering construction comprises a first bracket,a belt, a rotation shaft, a sliding block, a second belt wheel and grooves; a first shaft rod is arranged on the right side of the first bracket, a first belt wheel is arranged on the right side of the first shaft rod, and universal wheels are arranged at the bottom of the first bracket; a left take-up drum body is arranged on the right side of the belt, and a sealing block is arranged on the right side of the left take-up drum body; and a right take-up drum body is arranged on the right side of the sealing block, a second shaft rod is arranged on the lower right side of the right take-up drumbody, and a bearing is arranged on the right side of the second shaft rod. According to the cable take-up drum for computer communication engineering construction, structural arrangement is reasonable, a cable guiding block drives a cable to be distributed in the axial direction of the right take-up drum body and the left take-up drum body in the moving process, therefore, the cable is evenly distributed on the surfaces of the right take-up drum body and the left take-up drum body, the take-up effect of the cable is improved, efficient operation of the take-up drum can be better guaranteed, and development of electric power industry is promoted.

The invention discloses a communication cable rolling and releasing system for communication engineering and relates to the field of cable rolling and releasing. The communication cable rolling and releasing system comprises a cable rolling and releasing box. A shaft sleeve is fixedly connected to the middle of the surface of a box body on the upper side in the cable rolling and releasing box, a rotary rod is slidably connected in the middle of the lower surface of the shaft sleeve, a rolling and releasing roller is fixedly connected to the middle below the rotary rod, a rolling and releasingmotor is connected to the lower end of the rotary rod, a lower pulley is slidably connected to the lower side of the left box body of the cable rolling and releasing box, an upper pulley is arranged above the lower pulley, a supporting rod is slidably connected in front of the center of the upper pulley, the upper end of the supporting rod stretches into the middle of the upper side of the left box body of the cable rolling and releasing box, and a cable cleaning box is fixedly connected to the middle of the outer surface of the left box body of the cable rolling and releasing box. The communication cable rolling and releasing system disclosed by the invention can roll the cleaned cable, so that the cable is cleaned favorably, and the condition that soil on the surface of the cable scratches the skin of the cable in the rolling process is also avoided. The communication cable rolling and releasing system is high in practicality.

The invention discloses a positioning device for a communication engineering cable. The positioning device comprises at least two locking mechanisms superimposed. Each locking mechanism comprises a base and a top seat covering over the base. A plurality of first arc-shaped grooves are arranged in the lower surface of each top seat. Second arc-shaped grooves corresponding to the first arc-shaped grooves are arranged in the upper surface of each base. The first arc-shaped grooves and the second arc-shaped grooves form clamping holes of clamping a cable. A communication cable is locked by using the more than two layers of locking mechanisms and clamped by the clamping holes formed by the bases and the top seats, after the communication cable is laid, the communication cable is locked and fixed in a cable trough by using the positioning device, a plurality of communication cables can be laterally or longitudinally clamped and fixed, the structure is practical and reliable, the maintenanceof the communication cable is facilitated, meanwhile, the communication cable can be effectively prevented from being pulled after the communication cable is cut off, the communication cable is not easily stolen, and the security of the communication cable is greatly improved.

The invention belongs to the field of in-pulse signal type recognition in information and communication engineering and particularly relates to a composite modulation signal recognition method based on CWD time-frequency analysis. According to the method, a CWD algorithm is utilized to perform time-frequency image analysis on pulse sampling signals, and classification recognition can be performedpertinently on multiple conventional signals and multiple composite modulation signals. Compared with an ordinary instantaneous phase method, short-time Fourier transformation and other time-frequencyanalysis methods, the method has better anti-noise performance and also has good recognition performance under a low signal-to-noise ratio.

The invention discloses a wire roller for communication engineering construction, which includes a base, a first support and a second support are fixedly connected to both sides of the top of the base, and a supporting column is movably connected to the right side of the first support. The right side of the support column is fixedly connected with a connecting column, and the right side of the connecting column penetrates to the right side of the second bracket and is fixedly connected with the turntable, and the bottom of the right side of the turntable is fixedly connected with a handle. The present invention is provided with a base, a first bracket, a second bracket, a support column, a connecting column, a turntable, a handle, a first baffle, a first sleeve, a second sleeve, a second baffle, a fixing plate, a clamping rod, The combined use of fixed blocks, springs, partitions and card slots solves the problem that the existing wire rollers are fixed in length and can only wind a certain number of wires. The wire rollers used in communication engineering construction have adjustable The advantages of length facilitate the use of the user and improve the usability of the wire roller.

The invention belongs to the technical field of communication engineering, and particularly relates to a communication engineering construction whole process engineering consultation management systemwhich comprises an engineering information cloud storage module, an engineering information drawing input module, an engineering personnel information input module, an engineering progress information input module, an engineering information query management module and an engineering material information input module. The engineering drawing information, the engineering progress information, theengineering personnel information and the engineering material information are stored through the engineering information cloud storage module; a user can access the storage information of the cloud through the engineering information query management module; therefore, the progress of the whole project can be known, the progress of the project can be known at any time, and material use and personnel configuration on any project node can also be known, so that great convenience is brought to managers to perform corresponding adjustment and management on the project, and the quality of the project is effectively ensured.