36results about How to "Easy for long-distance transmission" patented technology

The invention discloses a matrix switching system and a matrix switching method for switching among multi-format video signals. The system comprises an optical fiber emission convertor, an optical matrix main unit and an optical fiber receiving convertor, wherein the optical fiber emission convertor is used for recognizing and converting the multi-format video signals into unified optical signals, emitting the optical signals to the optical matrix main unit, and receiving reversely transmitted optical signals to form control data; the optical matrix main unit is used for fulfilling conversion and transmission of the video signals, synchronously converting the control data corresponding to the video signal into optical signals in the video signal conversion and transmission process, and reversely transmitting the optical signals to the optical fiber emission convertor; the optical fiber receiving convertor is used for converting the optical signals transmitted by the optical matrix main unit into video signals taking the format of recognizable electrical signals of backward stage display equipment. The matrix switching system and the matrix switching method have the advantages that the signals of the input-output paths are mutually independent, so that when one path of signals get out of order, the transmission of other paths of signals can be prevented from being impacted; meanwhile, the problem that the transmission of the control signals requires a special cable can be solved effectively as reverse data are synchronously transmitted in optical fibers.

The invention discloses a single CAT5 net wire based KVM extender, which comprises a host end device and a user end device which are connected with the single CAT5 net wire. The KVM extender can realize transmission of audio signals, and specifically a realization method comprises the following steps that: S1, the host end device embeds the audio output signals into video signals by using a simulation embedding method, and sends the embedded signals to the user end device by three pairs of cables in the CAT5 net wire; and S2, the user end device de-embeds the acquired embedded signals into the video signals and the audio output signals, wherein the simulation embedding method is realized by sampling and keeping the audio output signals and then embedding the audio output signals into a blanking interval of the video signals. On the premise of not increasing the remote transmission cost, the KVM extender in the prior art is changed from noiselessness to noise by using four pairs of twisted-pair cables; and the KVM extender and the realization method have the advantages of low cost, convenient signal transmission, and the like.

The invention discloses a friction nanometer generator-based pressure type thermometer and a temperature measuring method thereof. The friction nanometer generator-based pressure type thermometer comprises a temperature sensing working medium, a liquid friction medium, an isolation medium, a gas buffer medium, a temperature sensing shell and a solid friction medium. According to the friction nanometer generator-based pressure type thermometer and the temperature measuring method thereof of the invention, the liquid friction medium, the isolation medium and the gas buffer medium are utilized toperform sealing, so that the leakage of the temperature sensing working medium is avoided; and the pressure of the temperature sensing working medium is obtained through the potential of an electrodelayer, so that online real-time temperature measurement can be achieved. The structure of the friction nanometer generator-based pressure type thermometer is simple in structure and are insusceptibleto the influence of local atmospheric pressure; the measurement result of the thermometer is convenient for long-distance transmission; and the thermometer can still read temperature on site under the condition of complete power failure. According to the friction nanometer generator-based pressure type thermometer of the invention, the mechanical energy of the temperature sensing working medium in a temperature measurement process is converted into electric potential energy, and self-energized temperature measurement is achieved. The friction nanometer generator-based pressure type thermometer has the advantages of simple structure, high precision, capability of achieving real-time measurement, self-energized operation, environmental friendliness, high efficiency and the like and has a great application prospect in the fields of material science, medical treatment and health, environmental science, the chemical industry and the like.

The invention discloses a power supply digital control development platform which comprises a platform external interface, an input signal conditioning circuit, a power drive output circuit, a switch control output circuit and a DSC minimum system, wherein the platform external interface at least is taken as an interface between an input signal and an output signal of the development platform; the input signal conditioning circuit correspondingly and adaptively conditions a power supply analog signal and a binary signal form the platform external interface; the power drive output circuit outputs power transistor switch control signals computed and output by the DSC minimum system to the platform external interface after the power transistor switch control signals are subject to adaptive drive capability treatment; the switch control output circuit outputs the switch control signals computed and output by the DSC minimum system to the platform external interface after the switch control signals are subject to adaptive treatment; the DSC minimum system is taken as a carrier of embedded software through taking DSC as a core processor during the development to bear the operating environment of the embedded software. The invention realizes the full-digital control and has strong expansibility and good control performance.

The invention provides an online monitoring system for fault location of a transmission line, comprising: a plurality of current detecting devices, wherein at least three detection points are arrangedbetween two adjacent substations, and each detection point is provided with a current detecting device; sub-controllers, wherein each of the current detecting devices is connected to one sub-controller; a first wireless communication modules, wherein each sub-controller is connected to the first wireless communication module; a second wireless communication module, wherein the first wireless communication module is connected to the second wireless communication module; and a total controller, wherein the second wireless communication module is connected to the total controller, and the totalcontroller calculates a fault point position according to the detection data of each current detecting device. The online monitoring system for fault location of the transmission line solves the phenomenon in the prior art that the controller is prone to crash when one controller executes the fault occurrence judgment and the fault location finding at the same time.

The invention discloses a circuit breaker switch state detection device based on the principle of a magnetic field. The circuit breaker switch state detection device comprises a magnetic field detection circuit, a single-chip microcomputer circuit, a data uploading circuit, an indicating lamp circuit and a power supply conversion module. The output end of the magnetic field detection circuit is connected with the single-chip microcomputer circuit. The output end of the single-chip microcomputer circuit is respectively connected with the indicating lamp circuit and the data uploading circuit. The power supply conversion module supplies power to the magnetic field detection circuit, the single-chip microcomputer circuit and the indicating lamp circuit. The disconnection state of a circuit breaker is detected by adopting the new parameter magnetic field, and an original detection mechanism can be assisted to judge the state of the circuit breaker so that reliability can be enhanced; the structure of the circuit breaker or the original detection system does not need to be changed; and data storage through a computer and monitoring of the detection result are facilitated for users.

The invention provides an electric power data collecting device and system and relates to the technical field of electric power data collection. The electric power data collecting device comprises a master control module, a carrier communication module, an RS485 module, a memory module and a power module, wherein the carrier communication module, the RS485 module, the memory module and the power module are communicated with the master control module; the RS485 module is used for downwards communicating with an electric energy meter; the power module is used for providing power supply for the electric power data collecting device; the carrier communication module is upwards communicated with a concentrator through a designated encryption algorithm; the master control module is used for receiving a first operation instruction and transmitting the first operation instruction to the electric energy meter, and meanwhile, receiving answer data returned by the electric energy meter, storing the answer data into the memory module and transmitting the answer data to the concentrator. The electric power data collecting device and system is based on the carrier communication technology, improves the anti-jamming capability during transmission, facilitates remote transmission and improves the data collecting capacity and the data transmission efficiency.

The invention relates to an extreme ultraviolet pulse generation modulator. The extreme ultraviolet pulse generation modulator comprises an electron source, a control grid, a focusing electrode and an anode target. Electrons are generated by the electron source, and the control grid is used for controlling the intensity of the electrons generated by the electron source to form electronic pulses. The electronic pulses are focused by an electric field formed by the focusing electrode, the anode target accelerates the electronic pulses, and the electronic pulses finally bombard the anode target to generate extreme ultraviolet pulse rays, wherein the wavelength range of the extreme ultraviolet pulse rays ranges from 10 nm to 200 nm.

The invention discloses an optical fiber drive method for a power switch in a direct current full-bridge converting circuit, and the method is realized by a photoelectric isolating drive circuit which comprises a controller (1), a PWM converter (2), a photoelectric coupler a (3), an encoder (4), an optical fiber transmitter (5), optical fiber (6), an optical fiber receiver (7) and a decoder (8). The controller (1) controls that a signal is transmitted to the PWM converter (2) and is converted into a PWM signal which is then transmitted to the photoelectric coupler a (3) and is converted into a separating PWM signal, and the separating PWM signal is transmitted to the encoder (4) and is integrated into one combined PWM signal which is then transmitted to the optical fiber transmitter (5), until the four PWM signals are transmitted to a power switch of the direct current full-bridge converter. According to the change of the level of the four PWM signals, the power switch can realize the conduction and disconnection. The invention has the advantages of strong interference rejection, unattenuated optical signal, short time lag produced in transmission and being convenient for long distance transmission.

The invention belongs to the technical field of fluorescent whitening agent preparation, and particularly relates to a device for preparing a toluylene bis(triazinyl) particular fluorescent whitening agent in a zero-waste-water-discharge manner and a preparation method thereof. The device for preparing the toluylene bis(triazinyl) particular fluorescent whitening agent is characterized in that the water putting quantity is reduced in a first condensing work section, a second condensing work section and a third condensing work section through circular reaction; meanwhile, in the first condensing work section, DSD acid powder is directly fed without dissolution, so that the zero waste water discharge in the reaction system is realized; after the third condensing reaction is completed, the pressure spraying drying is directly performed. The invention also relates to a method for concretely preparing the toluylene bis(triazinyl) particular fluorescent whitening agent by using the device.

The invention relates to a mixed multimode amplifier based on a multimode erbium-doped fiber amplifier (MM-EDFA) and an implementation method of the mixed multimode amplifier. The mixed multimode amplifier comprises a first division multiplexing device, an erbium-doped amplifying device, a second division multiplexing device and a gain equalization device, wherein the first division multiplexing device multiplexes input signals to different transmission paths according to a specific mode group for transmission; the erbium-doped amplifying device is connected with the first division multiplexing device, and comprises MM-EDFAs and variable optical attenuators, each MM-EDFA and the corresponding variable optical attenuator are mutually connected into one path, and the multiple paths of the MM-EDFAs and the variable optical attenuators are arranged parallelly; the second division multiplexing device is connected with the erbium-doped amplifying device to multiplex multipath signals to onepath; and the gain equalization device is connected with the second division multiplexing device for gain flattening of the signals in the wavelength range. Compared with the prior art, different modegroup signals are correspondingly subjected to gain adjustment by the mixed multimode amplifier, the inter-mode gain is effectively reduced, the amplifying performance of the EDFAs is improved, thenthe signal gain is adjusted within the wavelength range through multimode fiber raman amplifiers (MFRAs), gain flattening is achieved, and the mixed multimode amplifier is convenient, fast and easy tooperate.

The invention discloses a low-noise wireless audio transmitting system based on a linear amplification circuit. The system is characterized by mainly comprising a processing chip U and a capacitor C8. A negative electrode of the capacitor C8 is connected with a resistor R7 and then a GND pin of the processing chip U, and a positive electrode of the capacitor C8 is connected with a resistor R4 and then used as an audio signal input end. The system can process an audio signal. The system can improve the amplitude of the audio signal, thereby compensating for the weakness of the audio signal caused during long-distance transmission and improving the hearing effect of the receiving end. Meanwhile, the system can eliminate the current noise, prevent the current noise from interfering the audio signal, improve the sharpness of the audio signal, and improve the quality of signal transmission. The system can also make the amplitude of an output audio signal proportional to the amplitude of an input audio signal, avoid non-linear distortion of the audio signal, improve the stability of the audio signal, and thus facilitate long-distance transmission of the audio signal.

The invention relates to a method and a processor for controlling digital input and output. The method includes following steps: detecting whether a digital input interface is interrupted or not; when the digital input interface is interrupted, generating a first data packet according to the interruption, and sending the first data packet to a host to enable the same to analyze the first data packet and acquire information of the digital input interface according to an analysis result; receiving a second data packet sent by the host, wherein the second data packet is generated according to a preset function called by the host; analyzing the second data packet; acquiring information of a digital output interface according to an analysis result, and setting the digital output interface according to the information of the digital output interface. By the method and the processor, control functions of the digital input interface and the digital output interface are enabled to be more reliable and diverse; the method and the processor is suitable for various application occasions.

The invention discloses a system and method for judging fan tower deformation and foundation settlement, and the system acquires the temperature change data, displacement change data and strain changedata of a fan tower and a fan bottom foundation of a wind turbine generator in real time through a fiber bragg grating sensor, a fiber bragg grating wavelength demodulator is utilized to demodulate the data, and the demodulated data is then sent to a monitoring server so as to visually display the demodulated temperature change data, displacement change data and strain change data, thereby judging the deformation and foundation settlement of the fan tower. According to the invention, dynamic measurement can be realized, and the system has the advantages of strong anti-electromagnetic interference capability, good insulation, corrosion resistance, high precision, large-range measurement, high resolution, small size, light weight, strong capability of adapting to a measured environment, many measurable parameters, wide objects, strong compatibility with optical fibers, suitability for long-distance transmission, high sensitivity, and convenience for multiplexing and networking.