31results about How to "Solve signal attenuation" patented technology

The invention provides a wireless intelligent thermodector. The thermodetector is characterized by mainly comprising an advanced RISC (reduced instruction set computer) machine (ARM) processor (1), a Flash storage unit (2), a synchronous dynamic random access memory (SDRAM) (3), a general packet radio service (GPRS) module (4), an Ethernet interface (5), a geographic information system (GIS) module (6), a liquid crystal display (LCD) module (7), a keyboard input module (8), an analog / digital (A / D) converter-input (9), an A / D converter-output (10), a power supply module (11), an alternate current-direct current (AC-DC) module (12), a real-time clock (13), a multipath control input (14) and a multipath control output (15). The wireless intelligent thermodetector has the functions of automatic data recording and storage, real-time analysis, real-time display, clock synchronization, automatic monitoring (supervision), abnormal data warning, failure alarming, remote control, security management, automatic transmission, self-startup in outage and the like, has the advantages of simple structure, convenience for assembly and debugging and good reliability, and solves the problems of more conversion equipment, complicated equipment assembly, complicated cable distribution, slow abnormal response and the like in the conventional equipment.

The invention discloses a distributed traveling wave range finding method comprising the following steps: collecting traveling wave voltage and current data of multi-measuring point according to preset distances; timing and correcting the acquisition time; determining the initial traveling wave speed according to traveling wave time and measuring point distance measured on measuring points of two ends of the fault; determining the fault position according to the initial traveling wave speed, the distance of two adjacent measuring points, the fault propagation time to the measuring point, and two end range finding. The method distributes measuring points along power transmission line poles according to certain distances, and can dynamically measure the traveling wave speed approaching to the real value, thus solving the existing power transmission traveling wave monitoring problems, and ensuring the range finding precision under various complex conditions like high resistance grounding.

The invention discloses a laser radar device and a detection method. The basic idea of the invention is as follows: a transmission laser transmits generated laser to an optical discrete device; the optical disperse device performs spatial discreteness to form spatial discrete laser; the spatial discrete laser is incident to a target object; an echo signal receiving optical device receives an echo signal, and controls a component to process the echo signal. The discrete laser beams are not floodlight and not continuously distributed in space, and are a plurality of narrow light beams, so that a signal attenuation problem is greatly avoided, and thus the more distant target object can be detected, and detection performance of the laser radar is provided.

The invention discloses a compensation system rear-mounted frequency transmission system, comprising a transmitting device and one or a plurality of receiving compensation devices. The transmitting device is used for modulating a frequency signal with the phase locked at a reference frequency source to a light signal, and transmitting, through one or a plurality of optical fiber links, the frequency signal to one or a plurality of receiving compensation devices arranged at a receiving end. The receiving compensation device is used for receiving the frequency signal with optical fiber link phase noise from the transmitting device, taking the frequency signal as a first auxiliary compensation signal, loading a microwave signal generated by a frequency oscillator to the light signal to be transmitted by the optical fiber link and demodulated so as to obtain a second auxiliary compensation signal comprising the same phase noise as the first auxiliary compensation signal, generating a phase compensation signal on the basis of the first and second auxiliary compensation signals, performing feedback control on the phase of a signal output by the frequency oscillator, and reproducing a frequency signal with the phase locked at a frequency transmitting source. Through adoption of the system, the transmitting device can be simplified, and the problem of complication of co-transmitting terminal transmitting device probably caused by multilink parallel transmission of the frequency signal can be solved.

Embodiments of the present invention relate to a transmission method, base station and terminal for dynamically adjusting a beam set. The method comprises the steps of a base station sending first indication information to a terminal through a first layer of signaling, wherein the first indication information is used for indicating a first beam set; the base station sending second indication information to the terminal through a second layer of signaling, wherein the second indication information is used for indicating at least one beam in the first beam set; and the base station transmittingdata to the terminal through the at least one beam. According to the embodiment of the invention, the problem of signal attenuation caused by shielding can be solved.

The apparatus comprises: a bidirectional data communication device and a network adapter. Said network adapter is mounted on the user end; said bidirectional communication device is mounted on the node of cable TV distribution network. It also comprises a bidirectional repeater and a bandwidth detector. Said bandwidth detector automatically detects the available unused bandwidth in the cable TV distribution network, and allocates said unused bandwidth to the bidirectional data communication.

The invention provides a routing method for the fire fighting rescue network and a communication device. The routing method comprises steps that, to-be-transmitted fire fighting data is acquired through a wireless sensing element; a next base station type node and a node type which can receive the fire fighting data are determined, the node type is a fire fighting command vehicle, the node is taken as a target node, and a final routing path from the wireless sensing element to the target node is determined; if the node type is a relay base station, a routing path from the wireless sensing element to the node is recorded, a relay routing path from the node to the fire fighting command vehicle is acquired, and the fire fighting vehicle is taken as the target node to determine the final routing path; through the data transmission method based on a balancing network load, data transmission is carried out according to the final routing path. The communication device comprises the wireless sensing element and wireless coverage and relay equipment which are in mutual wireless communication. Through the method, the optimum routing capable of accomplishing data transmission can be searched among various nodes, and the method further has advantages of rapid transmission speed, high efficiency and high accuracy.

The invention provides a broken line repairing method. The broken line repairing method comprises the following steps of providing an array substrate, wherein a broken line is in a signal fan-out areaof the array substrate, and a first insulating layer and a transparent conductive layer cover the line; respectively arranging a first via hole and a second via hole at two ends of a broken part of the line; forming a repairing line, and connecting two ends of the broken part of the line through the first via hole and the second via hole; and forming a closed annular opening on the transparent conductive layer, wherein the repairing line is in an area enclosed by the closed annular opening. A part of the repairing line, electrically contacted with the transparent conductive layer corresponding to an adjacent line, is limited in the closed annular opening only, so that the impact on an electrical signal carried by the adjacent line is reduced.

The invention relates to the technical field of pressure sensing, and in particular to a pressure sensing device which can be used for detecting the pressure intensity. The pressure sensing device comprises a substrate, a conductive pattern layer and a pressure sensing signal wire, wherein the substrate comprises a first surface and a second surface; the first surface and the second surface are oppositely arranged; the conductive pattern layer is arranged on the first surface, comprises a plurality of pressure sensing electrodes and is used for sensing the touch pressure intensity; the pressure sensing signal wire is used for connecting the pressure sensing electrodes to a detection chip in a conducting manner and is of a hollow-out structure.

The invention provides a backing plate. The backing plate comprises a service slot and a core management slot which are mutually connected by a route, wherein the routing is divided into a first part for connecting the service slot and a second part for connecting the core management slot, and the first part and the second part are connected with each other by virtue of a pluggable connector. The route is divided into two parts, and the two parts can be mutually connected by virtue of the pluggable connector, thus the problem that a high speed signal is attenuated when being transmitted remotely is effectively solved; meanwhile, the backing plate can be smoothly upgraded, and the cost of a customer is reduced.

The invention relates to the technical field of monitoring systems, in particular to a public security intelligent security monitoring system. The system comprises a front-end monitoring device, a monitoring center and a mobile terminal, wherein the user terminal is an application program in a handheld mobile device of an inspector, the mobile terminal comprises an alarm sending module, a voice module, a video recording module and a wireless transmission module; the monitoring center comprises a client, and the client comprises an electronic map module, an alarm situation receiving module, analarm situation management module, a face recognition module, a voice recognition module and an alarm situation feedback module. According to the system, the wider monitoring is provided for the system through the video recording module in the mobile terminal, a commander can make judgment and indication immediately, rapid response to an alarm condition is achieved, the problem that an existing accident site is lack of monitoring is solved, and intelligent security and protection monitoring is achieved through the face recognition technology and the voice recognition technology.

The invention relates to base station equipment, in particular to base station equipment capable of working normally in a cable tunnel environment and supplying TD-SCDMA wireless communication network signal covering for the environment where the base station equipment is located. A TD-SCDMA base station applied to the cable tunnel is composed of an electronic switch (1), a modulation-demodulation module (2), a digital-to-analog conversion module (7), a receiving and sending interface module (3), a single-chip microcomputer (6) and a clock module (5). According to the TD-SCDMA base station applied to the cable tunnel, original simulation electric signals transmitted through cables are converted into high-frequency digital electric signals, so that the signals can be transmitted in optical fibers conveniently. In a long distance using environment like the cable tunnel, the signal attenuation problem caused by traditional communication cables can be solved, the reliability of transmission is improved, better anti-electromagnetic interference capacity is provided, and effective covering of the TD-SCDMA wireless communication network signal same as a ground environment can be provided stably.

The invention provides an indoor positioning method, a device, electronic equipment and a storage medium. The method comprises the following steps: collecting WiFi signal data and indoor image data of a current position; inputting the WiFi signal data and the indoor image data into an indoor positioning model to obtain a predicted position of the current position output by the indoor positioning model; wherein the indoor positioning model is used for respectively extracting signal features in the WiFi signal data and image features in the indoor image data, and performing positioning prediction after fusing the signal features and the image features. According to the method, the device, the electronic equipment and the storage medium provided by the invention, the WiFi signal data and the indoor image data are directly used for fusion positioning, and the precision and the efficiency of indoor positioning are improved.

The invention discloses a cloud image wireless communication apparatus for photovoltaic forecasting. The cloud image wireless communication apparatus comprises a power supply, a video processing module, a PAL / NTSC analog video input interface, a cloud map imaging device, a video compression encoding module, and a 4G wireless network card; the power supply is connected with the video processing module; the video processing module is connected with the cloud map imaging device via the PAL / NTSC analog video input interface; the cloud map imaging device is connected with the video compression encoding module; the video compression encoding module is connected with the 4G wireless network card via a USB interface; the 4G wireless network card is connected with a receiving master station via a 4G wireless network; the 4G wireless network is connected by employing a Socket manner; the video processing module is an SEED-DVS6446 video processing module; and an E3372-M150-2 data card is adopted by the 4G wireless network card. According to the cloud image wireless communication apparatus, the structure is simple, the cost is low, the power consumption is low and the data communication manner is reliable.

The invention discloses an image positioning method based on data modal missing and Embedded Net, which is composed of two stages of off-line modeling and on-line positioning, and comprises the following steps: S1, collecting training images, preprocessing the training images, carrying out category division, and taking the training images as a training data set; S2, extracting features of the training images and fusing with the features; performing offline classification learning to obtain a feature extraction network, a feature fusion network and a position classification model of optimal parameters; S3, collecting a target image, and performing image preprocessing on the target image; and S4, performing feature extraction and feature fusion on each target image, and then obtaining a position estimation value of the target. The multi-image measurement technology and the machine learning technology are combined, target positioning for the indoor complex environment is achieved, follow-up positioning work is conducted through the images collected by the camera, the problem of signal attenuation is solved, and the implementation cost of the scheme is reduced.

The invention discloses a communication method and system for an elevator shaft or a closed limited space, and is applied to the technical field of mobile communication. An equipment end obtains a first signal through a power line, adjusts the output power of the first signal, and sends the first signal after power adjustment. According to the communication method and system for the elevator shaft or the closed limited space, the problem of signal attenuation of an elevator car is solved through the power line carrier communication technology. Meanwhile, the output power is adjusted by determining the distance between the equipment end and the machine room end and predicting the output power, the coverage range is widened. Signals can be received in the elevator car.

The invention relates to an FOD (Foreign Object Debris) detection radar which comprises a base, a connecting sleeve, a supporting table, a signal receiving antenna and a signal transmitting antenna, wherein the base is arranged in an accommodating groove; the connecting sleeve is vertically arranged on the upper surface of the base, a rotating shaft is arranged on the inner side, and the lower endof the rotating shaft extends into the inner side of the base through a connecting hole; the supporting table is erected at the opening end of the connecting sleeve, the bottom surface is connected with the upper end of the rotating shaft, a detection opening is formed in one surface facing to an airport runway, a supporting plate is connected with the inside of the detection opening, a supporting beam is convexly arranged on one surface, corresponding to the detection opening, of the supporting plate, and a plurality of supporting openings are formed in the surface of the supporting plate positioned under the supporting beam; the signal receiving antenna is erected at one end of the upper surface of the supporting beam; the signal transmitting antenna is erected at the other end of the upper surface of the supporting beam. The FOD detection radar provided by the invention has the benefits that as the signal receiving antenna and the signal transmitting antenna are placed in a mannerof left and right arrangement in the horizontal direction, the central position of an entire radiation port is lifted, and the interference from the ground is reduced, so that the signal attenuation is weakened, and the full coverage of the runway by the system is maintained.

The invention provides a geological detection system for a horizontal drilling machine. The geological detection system comprises a corer, a pipeline robot, a camera system and detection equipment, wherein the corer and the pipeline robot are arranged in a coring channel, and the camera system and the detection equipment are carried on the pipeline robot. The pipeline robot comprises a robot body, a motor, a driving assembly and a coring clamp, wherein the motor, the driving assembly and the coring clamp are arranged on the robot body; the robot body is of an octahedral column structure and is connected with a winch through a steel wire rope; the motor is connected with the driving assembly and matched with the steel wire rope and the winch to achieve free movement of the pipeline robot in the coring channel; the coring clamp is used for grabbing the corer; the driving assembly comprises a plurality of driving wheels. The distance between the driving wheels and the robot body is adjustable; the pipeline robot, the camera system and the detection equipment each comprise a wireless communication module; and a plurality of repeaters are distributed on the steel wire rope at intervals to ensure signal transmission. By means of the geological detection system, efficient coring and surrounding rock recognition at an ultra-long horizontal distance can be achieved, the prediction precision is high, and signal transmission is stable.

The invention discloses a vehicle positioning method based on a reconfigurable intelligent surface, and relates to a vehicle positioning method. The invention aims to solve the problems that the performance of the existing wireless positioning algorithm is reduced when a direct link is blocked, the target position information cannot be accurately reflected, the requirements on a wireless sensor network and an antenna array are high, and the existing wireless positioning algorithm fails in an environment lacking infrastructure. The vehicle positioning method based on the reconfigurable intelligent surface specifically comprises the steps of step 1, establishing a vehicle position prediction model; step 2, establishing a virtual line-of-sight link; step 3, obtaining observation information and constructing an observation vector based on the step 1 and the step 2; and step 4, predicting the position of the vehicle by using an extended Kalman filter based on the step 1, the step 2 and the step 3. The method is applied to the technical field of signal processing.

The invention relates to a bioelectricity transmission technology in medical equipment and discloses a bioelectricity transmission device and method for an electronic health station. The device comprises left and right hand contact electrode plates. Each electrode plate is respectively provided with a set of corresponding bioelectricity transmission unit. The device is characterized in that each set of bioelectricity transmission unit respectively comprises a first electric signal adjusting module, a photoelectric conversion module, a first optical fibre signal transceiver and a second optical fibre signal transceiver at two ends of a shielded optical fibre, a photoelectric converter, and a second electric signal adjusting module. Compared with the prior art, the device and method disclosed by the invention have the characteristics that the measurement posture of a measurement item by taking human-body bioelectricity information as measurement basis is changed; the posture is unified to sit; positive and negative measurement positions are transferred to left and right hands of a human body; and furthermore, a device for amplifying and reducing a bioelectricity signal is designed, therefore, the signal attenuation problem in the bioelectricity signal transmission process is solved.

The invention discloses an IP unit, a logic control chip and a three-dimensional stacked chip, the IP unit comprises a first device module, a second device module and a control module, and the control module is located between the first device module and the second device module and is connected with the first device module and the second device module; the IP unit further comprises a signal output end, the first device module and the second device module are used for conducting signal enhancement processing on the data interaction signals output by the control module, and the signal output end is used for outputting the processed data interaction signals to an external control unit. The first device module and the second device module are arranged on the two sides of the control module, and signal enhancement processing is performed on the data interaction signal output by the control module through the first device module and the second device module, so that the problem of signal attenuation caused by an overlong signal transmission line is solved.

The invention discloses a noise shaping successive approximation analog-to-digital converter based on error feedback. The invention consists of a first core circuit of a positive terminal, a second core circuit of a positive terminal, a first core circuit of a negative terminal, a second core circuit of a negative terminal, a comparator, a logic control and a register module. Positive terminal first core circuit sampling save and feedback V INP , to the comparator output V COM+ , output V to the second core circuit of the positive end RES+ ; Positive second core circuit samples V RES+ , for V INP Feedback V RES+ ; The first core circuit of the negative end is sampled and saved and fed back V INN , to the comparator output V COM‑ , output V to the second core circuit at the negative end RES‑ ; The second core circuit at the negative end samples V RES‑ , for V INN Feedback V RES‑ ; the size of the ; logic control and register block according to the comparator to V COM+ and V COM‑ The judgment result is calculated, and Ctrl is output to the first core circuit of the positive end and the first core circuit of the negative end respectively. + , Ctrl ‑ , output the quantization result. The invention can improve the signal-to-noise ratio and the quantization precision of the analog-to-digital converter, and suppress the frequency band noise.

The invention discloses a system and a method for improving the data transmission speed of an electronic tag, which expand the communication path between the electronic tag and a base station by introducing the combination of a plurality of routers AP + so as to realize relatively long-distance coverage and high-speed application to the electronic tag. When the router AP + meets the channel and PIN ID of the base station, the router AP + is switched to the base station; the router AP + serves as a father node and is added to a network of the base station, the electronic tag communicates with the base station through the bridge of the router AP +, the data transmission rate is greatly increased, meanwhile, the strength of the signal transmission process is guaranteed, and the signal attenuation problem caused by too long distance, obstacle blocking and the like is avoided.

The invention discloses red printing ink used for an electronic product and a preparation method thereof. The red printing ink contains silicon hydride particles. The silicon hydride particles are prepared by adopting magnetron sputtering or arc discharge, wherein mole percent of hydrogen atoms is controlled to be 3-30% when the silicon hydride particles are prepared. The red printing ink disclosed by the invention has the advantages that the silicon hydride particles with the hydrogen atom mole percent of 3-30% are used for preparing the red printing ink, the traditional red printing ink madefrom Fe2O3 powder is replaced, the problem of signal attenuation is solved and red is purer.