49results about How to "Good for long-distance transmission" patented technology

The invention relates to a novel wavelength division multiplexing demultiplexing optical assembly applied to high-speed parallel long-distance transmission. The output end of a laser group is sequentially provided with a lens group, an optical regulating plate group, a lower layer silicon lens array and a lower layer optical filter group, wherein the output end of the lower layer optical filter group is provided with a lower layer free space wavelength division multiplexing device, the output end of the lower layer free space wavelength division multiplexing device is provided with an optical isolator, the output end of the optical isolator is provided with a focusing lens, the output end of the focusing lens is connected with an input optical fiber, an output optical fiber is connected with a collimating lens, the output end of the collimating lens is connected with a prism, the output end of the prism is provided with an upper layer free space wavelength division multiplexing device, the output end of the upper layer free space wavelength division multiplexing device is provided with the upper layer optical filter group, the output end of the upper layer optical fiber group is provided with an upper layer silicon lens array, and the output end of the upper layer silicon lens array is provided with a detector group. The optical signal multiplexing and demultiplexing is realized by using the optical filter array structure.

The invention discloses a single-fiber bidirectional BOSA structure. The single-fiber bidirectional BOSA structure comprises a packaging housing, a TOSA, an ROSA, and a light transmit-receive integrated optical structure. The TOSA comprises a light emitting group and a wavelength division multiplexing structure, and the ROSA comprises a light receiving group and a wavelength division de-multiplexing structure; one end of the housing is provided with an optical interface, and optical signals received by the optical interface are emitted to the wavelength division de-multiplexing structure of the ROSA through the light transmit-receive integrated optical structure; signal light emitted by the TOSA, after light combination through the wavelength division multiplexing structure, is transmitted to the optical interface through the light transmit-receive integrated optical structure, and the optical interface outputs the signal light emitted by the TOSA; and the TOSA, the ROSA and the light transmit-receive integrated optical structure are packaged in the housing. According to the invention, the structure is used for a four-channel high-speed transmit-receive system, uplink and downlink transmission is carried out directly on one fiber, external devices or equipment is unnecessary, the system structure is greatly simplified, the operation cost is decreased, the assembling is convenient, the insertion loss is effectively reduced, the coupling efficiency is enhanced, the temperature performance is good, and long-distance transmission of the optical signals is facilitated.

The embodiment of the invention discloses a device for improving the photo-communication reliability. The device comprises at least two different transmitting lenses, wherein the transmitting lenses comprise a first transmitting lens and a second transmitting lens; the spatial transmitting angle of the first transmitting lens is 1.3-1.7 milliradian; and the spatial transmitting angle of the second transmitting lens is 1.8-2.2 milliradian. The embodiment of the invention further discloses a system for improving the photo-communication reliability. By utilizing the device and the system which are disclosed by the invention, the light transmission range and the receiving power of a receiving terminal are increased and the photo-communication stability and reliability are improved on the premise of ensuring that a communication link is connected.

A method for sampling multichannel analog signal includes using an individual circuit and applying differential signal form inputted by balanced mode to transmit analog signal in each channel, receiving differential signal by multiple channel interfaces in parallel mode simultaneously and carrying out A / D conversion simultaneously, applying over sampling mode in A / D conversion, using high speed serial communication mode to carry out data exchange between A / D converted digital signal to microprocessor, applying serial interface to carry out system initialization and program controlled command transmission.

The invention discloses a transmission tower network communication method and system. The method includes: using wireless frequency hopping technology to broadcast a network reorganization instruction, and the network reorganization instruction includes a first address; receiving several information collection terminals according to the first address; The address adopts the registration request returned by wireless frequency hopping technology; according to the registration request returned by each information collection terminal received and the preset communication time, a communication timing segmentation table is established; according to the communication timing segmentation table, wireless frequency hopping technology is used to send data transmission instructions ; Receiving the returned data, the data is sent by the information collection terminal receiving the data sending instruction using wireless frequency hopping technology. The invention adopts the frequency hopping communication technology for efficient data transmission, and solves the influence of transmission line electromagnetic interference on field data transmission; the frequency hopping communication technology has strong remote communication capability and fast data transmission, and better achieves the on-site operation status of the transmission tower monitor.

The invention discloses a digital level sensor, which comprises a shell, wherein a circuit system, a suspension swinging component, a hydraulic micro displacement amplifying component and parallel light sources are arranged in the shell; the suspension swinging component comprises a swinging hammer, a T-shaped push rod and a swinging hammer revolving shaft; the swinging hammer is movably connected with the swinging hammer revolving shaft through the T-shaped push rod. The sensor is characterized in that digital signals are output, each sensing element outputs signals in the forms of switch pulses, and sampled data are only '0' and '1', so that the defect of fuzzy components in the conventional analog quantity detection way is overcome, the influences of various environment distribution parameters such as temperature, air pressure intensity, electric fields and magnetic fields are avoided, and the accuracy and reliability of detection are increased. Moreover, the digital level sensor is very high in resolution and accuracy, simple in structure and low in cost.

The invention discloses a laser optical disc-based digital inclined-angle sensor. The laser optical disc-based digital inclined-angle sensor comprises a housing, a fixing seat, two laser head assemblies and a turnplate, wherein the two laser head assemblies and the turnplate are arranged in the housing. The fixing seat is fixed on an upper of the housing. A circuit board is arranged in the fixing seat. The circuit board is provided with a microprocessor. The two laser head assemblies are connected to the microprocessor by two circuits. The two laser head assemblies are located below the fixing seat. The turnplate is located below the two laser head assemblies. The turnplate is fixed in the housing by a rotation shaft. The turnplate is provided with a pendulum bob. The periphery of the turnplate is provided with a round of reflector panels. Tops of the reflector panels are located behind the two laser head assemblies. The reflector panels are provided with multiple nicks. The laser optical disc-based digital inclined-angle sensor has the advantages of high resolution ratio, high precision, stable and reliable performances, good linearity, high signal-noise ratio, low influence caused by a temperature change, wide measuring range (360 degree), simple structure and low cost.

The invention relates to a 40G 40km CFP optical module comprising an optical receiving unit, an optical emitting unit, a digital diagnosis unit, a power supply unit and a 148 PIN electrical interface unit. The power supply unit is respectively connected with the optical receiving unit, the optical emitting unit, the digital diagnosis unit and the 148 PIN electrical interface unit and used for providing power input; the optical receiving unit is connected with the digital diagnosis unit and used for providing optical detection signals; the optical emitting unit is connected with the digital diagnosis unit and used for providing optical detection signals; the optical receiving unit is connected with the 148 PIN electrical interface unit and used for converting input optical signals to electric signals to be output; the optical emitting unit is connected with the 148 PIN electrical interface unit and used for converting the input electric signals to the optical signals to be output; and the digital diagnosis unit is connected with the 148 PIN electrical interface unit and used for providing digital diagnosis signals to remote communication equipment. The optical module has the function of high-speed photoelectric conversion, has high integration level and stable performance, and is helpful for remote transmission of signals.