15 results about "Transmitter station" patented technology

The invention provides an ionosphere parameter inversion method and device, and belongs to the technical field of short-wave communication, and the method comprises the steps: enabling the actually-measured amplitude and phase difference to be mapped into a low-order wave mode excitation amplitude and a complex feature value through the synchronous receiving of the same very-low-frequency transmitting station signal at different transmitting and receiving distances on the ground; and then fast convergence solution is carried out by using a Newton-Raphson method, and ionosphere electron concentration parameters are circularly corrected by using a gradient descent method, so that the residual error of a theoretical calculation result and a measured value is stabilized within a preset threshold, thereby getting rid of excessive dependence on a traditional ionosphere mode, remarkably improving the inversion precision of low ionosphere parameters, and improving the reliability of the low ionosphere. The method has the advantages of simple operation, low cost and long-term operation.

1. The name of the design product: the shell of wireless charging transmitter. 2. The use of the design product: for charging wireless charging device. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1. 5. Other circumstances that need to be explained: the overall appearance contour of the product is a solid line protection range, and the side and front of the product are a dotted line non-protection range.

This invention discloses a method for precise elevation measurement based on the fusion of wMPS and RTK real-time dynamic positioning systems, comprising: acquiring the two-dimensional planar coordinates of the point to be measured in an external coordinate system, and transforming them to the wMPS transmitter station coordinate system using a pre-calibrated coordinate transformation relationship; receiving the scanning light plane signal using a photoelectric receiver and calculating the relative phase difference when the scanning light plane sweeps across the point to be measured; establishing an instantaneous light plane constraint equation between the spatial coordinates of the point to be measured and the rotating scanning phase; substituting the coordinates of the point to be measured into the instantaneous light plane constraint equation to obtain a system of linear equations with elevation variables and the absolute phase of the rotating scan as variables, and then obtaining a linear expression for the intermediate variable of the rotating scan phase; substituting the obtained intermediate variable of the rotating scan phase into the trigonometric identity constraint to obtain the elevation variable of the point to be measured in the wMPS transmitter station coordinate system, and then outputting the three-dimensional coordinates in the external coordinate system according to the pre-calibrated rigid body coordinate transformation relationship.

The utility model discloses a frequency modulation frequency band digital audio broadcast monitoring device which comprises an antenna, an FM tuning decoding module, a CDR digital audio decoding module, an audio switching module, an FPGA processing unit, a single-chip microcomputer, a remote communication module, an audio power amplifier, a loudspeaker, a buzzer and an LED button module. The FM tuning decoding module and the CDR digital audio decoding module output audio signals, and the audio switching module selects channels under the control of the FPGA and outputs the audio signals to the power amplifier driving loudspeaker. The FPGA analyzes the input audio and detects interruption and mute faults; the single-chip microcomputer receives the fault signal to control the buzzer and the LED to give an alarm, and uploads fault information through the remote communication module. The device supports analog and digital broadcast monitoring switching, has the functions of fault detection, alarm and remote monitoring, and improves the intelligent management and safe broadcast guarantee capability of the broadcast transmitting station.

The utility model discloses a main transmitting station, a broadcast-on-behalf transmitting station and an automatic broadcast-on-behalf frequency modulation transmitting system. The main transmitting station at least comprises at least one main station transmitter used for receiving a corresponding frequency information source; the power detection module is connected with at least one master station transmitter and is used for acquiring level signals of all master station transmitters and sending the level signals corresponding to all master station transmitters to the audio switching module; and the audio switching module is connected with the power detection module, and is used for receiving information sources with different frequencies, selecting the information source with the corresponding frequency through each level signal when the level signal indicates that the main station transmitter has a fault, and sending the information source with the corresponding frequency to a broadcasting transmitting station. The main transmitting station obtains the level signal of the main station transmitter through the power detection module, and the audio switching module selects the information source of the corresponding frequency according to the level signal, so that the information source can be automatically sent to the substitute broadcasting transmitting station when the main station transmitter fails, and the substitute broadcasting transmitting station performs substitute broadcasting.

This utility model discloses a novel wireless transmitter source switching system, comprising a loop control module, a signal output module, a signal detection module, a working indicator module, and a signal input module. The signal output module, signal detection module, working indicator module, and signal input module are electrically connected to the loop control module. A power control module is electrically connected to each of the loop control module, signal output module, signal detection module, and working indicator module, and is powered by AC mains electricity. This utility model relates to the field of automatic source switching for wireless broadcast transmitters, specifically a novel wireless transmitter source switching system.

The utility model discloses an automatic recording instrument for tunnel lining deformation, and relates to the technical field of tunnel safety monitoring, the automatic recording instrument for tunnel lining deformation comprises an information processing input terminal, a deformation monitoring assembly and a data monitoring assembly, the deformation monitoring assembly comprises an optical fiber cable, and the optical fiber cable is connected with the information processing input terminal. The optical fiber cable is provided with an optical fiber grating sensor; the data monitoring assembly comprises an optical signal transmitting station, the optical signal transmitting station is provided with an optical signal transmitter, the optical signal transmitting station is provided with a signal receiving station, and the signal receiving station is provided with a signal receiving mechanism. After the optical signal emitted by the optical signal emitter is reflected and received by the fiber grating sensor, the tunnel lining deformation can be monitored according to the change of the reflected optical signal, the data is automatically recorded through the information processing and recording terminal, the anti-interference capability of the optical fiber is strong, and the monitored data is accurate.

The utility model discloses a novel broadcast signal electronic attenuator system of a broadcast television transmitting station, which belongs to the technical field of electronic attenuators and comprises an electronic attenuator, and the electronic attenuator comprises a touch one-out-of-three control circuit and a judgment and amplitude modulation control circuit. A digital potentiometer DS1669 integrated block, a D-type trigger CD40175B integrated block and other integrated circuits form a radio and television transmitting station broadcast signal electronic attenuator system without mechanical switch contacts and potentiometers, so that safe broadcast accidents caused by poor contact of the attenuator are avoided. The circuit design is simple, debugging is not needed, mechanical contacts and potentiometers are not needed, and broadcast safety accidents caused by poor contact are eliminated; after being used for a long time, the device is safe and reliable, has no fault until now, and is good in use effect. In conclusion, the product has good use value and wide market prospect.

This invention discloses a positioning device and method for the cable-stayed bridge main beam end cable sleeve, including a laser transmitter (1) fixed on the reserved cable-passing hole of the steel box girder and a target receiving device (2) fixed on the front end of the cable sleeve; the laser transmitter includes a positioning frame (3) fixed on the reserved cable-passing hole of the steel box girder and a laser emitter (4) set on the positioning frame; the target receiving device includes a positioning frame fixed on the front end of the cable sleeve and a positioning target (5) fixed on the positioning frame; this invention has a simple structure, accurate positioning of the cable sleeve angle, and convenient installation, which improves the concentricity of the cable and the cable sleeve, construction efficiency and construction safety.

The utility model relates to the technical field of information communication, and discloses an emergency communication device comprising a processor module; the wireless communication module is connected with the processor module through an SPI (Serial Peripheral Interface) bus; the transmitting module is electrically connected with the processor module through an I2C bus; the mediation module is electrically connected with the processor module through an I2C bus; and the display module is electrically connected with the processor module through an I2C bus. The emergency communication device solves the problems that in the prior art, signals of the emergency communication device are seriously influenced in mountain forests or severe weather, when a resident residence place is far away from an FM broadcast transmitting station, the signals are blocked easily, and when natural disasters occur, alarm signals cannot be received and cannot be avoided in time, so that the occurrence of the natural disasters is influenced. And serious personnel and property loss is caused.

The application provides an ionosphere parameter inversion method and device, and belongs to the technical field of short wave communication. The method comprises the following steps: synchronously receiving signals of a very low frequency transmitting station at different transmitting and receiving distances, mapping the amplitude and phase difference obtained by actual measurement into low-order wave mode excitation amplitude and complex eigenvalues, quickly converging and solving by using the Newton-Raphson method, and cyclically correcting the ionosphere electron concentration parameter by using the gradient descent method, so that the residual error between the theoretical calculation result and the actual measurement value is stabilized within a preset threshold, the excessive dependence on the traditional ionosphere model is broken, the inversion accuracy of the low ionosphere parameter is significantly improved, and the method has the advantages of simple operation, low cost and long-term operation.

The utility model discloses a medium wave transmitting station lightning protection device which comprises a transmitting station assembly, a wire clamping mechanism, a wire clamping butt joint mechanism and an auxiliary rotating mechanism, the wire clamping mechanism comprises a grounding wire, a clamping inner pipe, a rotating sleeve, a rotating push block, a rotating push spring and a wire clamping plate, and the wire clamping butt joint mechanism comprises a slope block, a clamping outer pipe, a clamping groove, an extending clamping frame, a rotating frame and a rotating pressing plate. According to the wire clamping mechanism, self-adaptive clamping of grounding wires with different diameters and limiting rotation design of a rotary sleeve are realized, and continuous stable pressure provided by a rotary push spring is matched, so that a wire clamping plate can firmly clamp the grounding wires, reliable connection is ensured, and the service life of the grounding wires is prolonged. The wire clamping butt joint mechanism forms a safe and reliable connection and separation system through the clamping groove, the stretching-in clamping frame, the rotating frame and other assemblies, the stretching-in clamping frame is automatically locked into the clamping groove under the action of the stretching-in spring, self-locking is achieved, and the connection stability of the down lead and the grounding wire is remarkably improved.

A method of determining the position of an autonomous underwater vehicle The method comprises: transmitting a plurality of acoustic signals from one or more transmitters, receiving the plurality of transmitted acoustic signals at an autonomous underwater vehicle; and determining, from the received acoustic signals, the position of the autonomous underwater vehicle; wherein the plurality of acoustic signals are offset from one another in frequency.

The application discloses a kind of high mountain unmanned launching station's monitoring alarm device and monitoring alarm method, comprising: FM frequency modulation receiving module, RDS information decoding module, audio comparison unit, beidou short message transmission terminal and microprocessor;FM frequency modulation receiving module is used to receive FM frequency modulation signal, and FM frequency modulation signal is respectively transmitted to RDS information decoding module and audio comparison unit;RDS information decoding module decodes monitoring in the RDS information in FM frequency modulation signal;Audio comparison unit is used to receive external reference audio and FM frequency modulation signal transmission of frequency modulation audio;Microprocessor receives RDS information decoding result and audio comparison result, when detecting RDS information decoding exception or audio comparison exception, trigger signal is sent to beidou short message transmission terminal;After beidou short message transmission terminal receives trigger signal, alarm information is sent to ground launching station by beidou satellite. With less equipment and lower cost, the monitoring of high mountain unmanned station frequency modulation FM emission state is realized.

The utility model discloses a communication system for application upgrading. The communication system comprises a broadcast signal transmitting station and a broadcast signal transmitting tower, the broadcast signal transmitting station comprises a transmitter and at least one server, each server is connected with the transmitter through a multiplexer, and the transmitter is connected with the broadcast signal transmitting tower through a feed pipe; the first server in the servers is used for transmitting application upgrading data of at least one application to the multiplexer; and the second server in the servers is used for transmitting the audio and video data to the multiplexer. The first server and the second server are connected with the transmitter through the multiplexer, and the transmitter is connected with the broadcast signal transmitting tower through the feed pipe, so that the application upgrading data can be transmitted to the application terminals in batches in a broadcast form, and the application terminals can be automatically upgraded on a large scale without adding equipment and various cables.