187 results about "Fibre Channel" patented technology

The invention relates to the technical field of optical fiber sensing, and discloses an optical fiber sensing signal adaptive demodulation analysis method for inhibiting common-mode interference, which comprises the following steps of: synchronously acquiring an original signal of a main sensing optical fiber channel and a common-mode interference signal of a reference optical fiber channel, and performing time-frequency conjoint analysis on the signal of the reference optical fiber channel to obtain a common-mode interference signal; s2, extracting an interference spectrum component containing temperature drift and light source fluctuation characteristics, constructing a hybrid adaptive filter bank which comprises a recursive least square (RLS) filter and a variable step size least mean square (LMS) filter which are connected in parallel, and dynamically adjusting a forgetting factor of the RLS filter and a step size factor of the LMS filter based on the interference spectrum component extracted in the step S2, according to the optical fiber sensing signal adaptive demodulation analysis method for suppressing common-mode interference, a parameter adjustment strategy is continuously optimized, a pure vibration signal with an output signal-to-noise ratio is improved, and the effect of accurately suppressing common-mode interference in real time is achieved.

The invention discloses a UPS (Uninterrupted Power Supply) parallel operation redundancy system and a control method thereof, and relates to the field of UPS, the UPS parallel operation redundancy system comprises a plurality of groups of UPS modules, a plurality of groups of UPS module parallel links, a monitoring unit, a control unit and a switching unit; voltage sampling points of each group of UPS modules are connected with the AD conversion module of the monitoring unit through a double-shielding coaxial line, the control unit is connected with the monitoring unit through a PCIe bus, and the switching unit receives signals output by the control unit through an optical fiber channel. Through a multi-factor coupling mechanism of the dynamic redundancy capacity distribution model, the temperature correction index and the time attenuation factor are deeply fused, real-time dynamic optimization of UPS module load distribution is realized, and performance attenuation and local overload in a high-temperature environment are effectively inhibited; and through the combined criterion of the historical fault integral and the instantaneous over-threshold, the cooperative adaptive capacity of the system to the progressive fault and the sudden load fluctuation is improved.

The invention discloses a background noise body wave extraction method and device based on distributed optical fiber acoustic sensing, and the method comprises the steps: obtaining an original phase difference signal along an optical fiber channel through a distributed optical fiber acoustic sensing system, and converting the original phase difference signal into strain rate data according to system demodulation parameters; performing preprocessing such as noise suppression and frequency energy balance on the strain rate data; calculating an autocorrelation function for the preprocessed signal, and superposing autocorrelation results of a plurality of time segments; performing band-pass filtering on the superposition autocorrelation function in a target frequency band, and extracting a body wave reflection response in background noise; and in order to eliminate the influence of the zero-time pulse in the shallow layer or weak reflection signal, carrying out mean value removal processing on the extraction result along the space direction to obtain a zero-offset body wave reflection response. The method can effectively describe the discontinuity from a superficial sedimentary layer and a fracture to a deep mourhua surface and even a lithosphere, and makes up for the defects of a conventional seismic station method.

The invention discloses a multi-optical fiber bundle imaging mode dimension space conversion plasma spectrum analysis system, which is characterized in that a two-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber area array, a one-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber linear array, and an optical fiber surface is connected by adopting M * N optical fibers according to a preset connection relation, the two-dimensional optical fiber array is converted into the one-dimensional optical fiber array, the optical grating disperses light transmitted by the optical fiber linear array, then the light is focused by the imaging lens and then is subjected to optical imaging by the CCD detector, and the spectral data conversion module converts a spectral image into a spectral data graph of each optical fiber channel. According to one-to-one correspondence of optical fibers in the two-dimensional optical fiber area array and the one-dimensional optical fiber linear array, the distribution state of elements in the plasma is reconstructed, and multi-optical-fiber sample element content detection is achieved.

This application relates to a communication method and apparatus. The method includes: A first SMF network element receives first information from a PCF network element, where the first information includes an identifier of a first dedicated data network to which a terminal device subscribes; the first SMF network element sends a first request including the identifier of the first dedicated data network to a second SMF network element that supports the first dedicated data network; the first SMF network element receives, from the second SMF network element, a first response including second tunnel information of a second UPF network element, where the second UPF network element is a UPF network element selected based on the first dedicated data network; and the first SMF network element sends second information to a first UPF network element, where the second information includes the second tunnel information and a first traffic steering rule.

The invention relates to a two-dimensional optical fiber collimator array and an optical communication system, the two-dimensional optical fiber collimator array comprises an optical fiber array, a plurality of optical fibers form a two-dimensional matrix, and the end face of the optical fiber array is subjected to one-time grinding and polishing treatment; the glass flat sheet is positioned behind the grinding and polishing end surface of the optical fiber array and is fixedly connected with the optical fiber array; the plano-convex lens array is composed of a plurality of plano-convex lenses, each plano-convex lens corresponds to one optical fiber channel in the optical fiber array and is located behind the glass plain sheet, and each plano-convex lens can be independently adjusted. According to the invention, the problems of complex manufacturing process, poor channel consistency, difficulty in system integration adjustment and the like in the traditional single-fiber collimator assembly mode are solved. Through the unique structural design, the manufacturing efficiency and the use reliability are remarkably improved while the optical performance is ensured.

Methods and systems that can be used for aligning and positioning of an optical fiber are provided herein. For example, an optical fiber alignment and positioning system including a vacuum stage may be provided. The vacuum stage may include a vacuum inlet operable to be in fluid communication with a vacuum source and one or more passages extending through the vacuum stage. The vacuum stage may include an optical fiber channel. A plurality of vacuum ports may pass through the optical fiber channel. The optical fiber channel may include a directional friction surface. The directional friction surface may include a first friction factor in a first direction and a second friction factor in a second direction. The directional friction surface may contact a portion of the optical fiber and may allow movement in the second direction but resist movement of the optical fiber in the first direction.

The invention discloses a power distribution area energy storage-photovoltaic oscillation cooperative suppression method based on impedance remodeling, and belongs to the technical field of power system stability control. According to the method, the impedance characteristic of the system is scanned online in real time, the virtual impedance controller parameters of the photovoltaic inverter are dynamically optimized, and the impedance frequency characteristic of the zone area network is actively remodeled, so that the zone area network is always far away from a stable critical point, and oscillation is prevented from occurring from the source. When it is detected that the oscillation energy exceeds the standard, the system immediately triggers the energy storage device to be switched to a virtual synchronous generator mode, phase information of a plurality of energy storage units in a fiber channel synchronization cluster is used, anti-phase damping current opposite to the oscillation trend is injected, and the oscillation energy is rapidly consumed. The invention provides a double-layer suppression strategy based on impedance remodeling and energy storage cooperation, the cooperation of photovoltaic impedance active prevention and energy storage instantaneous suppression is realized, the problem that a traditional fixed parameter damper loses efficacy due to frequency drift is solved, and the operation stability of a high-proportion renewable energy power distribution network is improved.

An optical fiber distribution sub-frame including a base plate, two opposite sides of which are each provided with a mounting point position; a bracket, which is detachably mounted at the mounting point position on any side of the base plate; and an optical fiber channel tray, which is hinged to the bracket. When the bracket is mounted at the mounting point positions on different sides, the optical fiber channel tray is reversed along with the bracket. When the bracket changes position, the optical fiber channel tray connected to the bracket can be reversed together, so that the bracket and the optical fiber channel tray can be replaced from one side of the base plate to the opposite side, and after reversing, the base plate can be replaced from one rotation direction to the other relative to the optical fiber channel tray. One sub-frame can meet two different usage scenarios of left-hand rotation and right-hand rotation through disassembling and reversing, without the need to prepare two types of sub-frames, reducing stocking inventory, thereby saving time and costs. In addition, a method for reversing the orientation of the bracket and the optical fiber channel tray is as described above.

The invention relates to the technical field of space telescope calibration, in particular to a telescope pointing calibration method based on optical fiber interconnection, which comprises the following steps: providing reference light beams in different directions, enabling each lens to correspondingly receive the reference light beams by adjusting the lens pointing, splitting the reference light beams received by the lenses through an optical splitter, and obtaining a split beam; one beam is aligned and corrected through a camera, and the other beam is coupled into an optical fiber to record direction information; the calibration light beams are reversely emitted by the optical fiber through the optical switch and are emitted by the lens, each reference light beam in the known direction is reproduced, a reference light field is formed, the telescope to be calibrated is placed in the reference light field, the miss distance of each calibration light beam in the known direction on the mirror surface of the telescope to be calibrated is measured, and the pointing error is calculated and corrected according to the miss distance. The optical fiber network is used for establishing the unique mapping relation between the space direction and the optical fiber channel, miss distance measurement is carried out through dynamic time-sharing reproduction, and the problems of mechanical accumulative errors and the like existing in a traditional mechanical calibration method are solved.

The invention relates to a micro-fluidic chip based on a reflector light path and a preparation method of the micro-fluidic chip. The reflector light path comprises an incident optical fiber channel, an emergent optical fiber channel and a liquid drop flow channel, a first reflecting mirror runner and a second reflecting mirror runner are arranged on the two sides of the liquid drop runner, liquid metal is poured into the first reflecting mirror runner and the second reflecting mirror runner respectively, and then the liquid metal is cooled and solidified to form a first reflecting mirror and a second reflecting mirror. By utilizing a light path formed by multiple reflections, the effective absorption light path is increased, and the detection sensitivity and accuracy are improved; and the liquid drop flow channel is not bent, so that the liquid drops are not damaged, and the compatible liquid drop size range is wide.

The invention provides an endoscope which comprises a disposable passive endoscope sheath and a reusable endoscope body, the passive endoscope sheath comprises an endoscope sheath handle, an insertion part and an optical fiber, the endoscope sheath handle is arranged at the near end of the insertion part, and an endoscope body access port is formed in the endoscope sheath handle; an optical fiber channel and a camera shooting channel are arranged in the insertion part, and the lens body access port is communicated with the camera shooting channel; the optical fiber is arranged in the optical fiber channel, the near end of the optical fiber is provided with a first optical fiber connecting part, the first optical fiber connecting part is arranged on the endoscope sheath handle, the first optical fiber connecting part is used for being directly or indirectly connected with a light source, and the light source conducts illumination through the optical fiber; the endoscope body comprises a camera shooting assembly and an endoscope body handle, the camera shooting assembly is connected to the far end of the endoscope body handle, the camera shooting assembly extends into the camera shooting channel through the endoscope body access port, and the endoscope body handle is detachably connected with the endoscope sheath handle.

The invention relates to a high-speed data acquisition and storage method, system and device and a medium, and belongs to the technical field of signal acquisition and data storage, and the method comprises the steps: collecting at least one path of high-voltage probe pulse signals and 24 paths of switch probe signals in real time; attenuating the high-voltage probe pulse signal to an input threshold range of an optocoupler, and performing signal conversion and electrical isolation to generate a TTL level signal; performing micro-capacitor charging and discharging detection on the switch probe signal, and recording to obtain switch probe timestamp data; tTL level signals, switch probe timestamp data and 64-bit time reference data are packaged into data frames, and the data frames are parallel through main and standby dual-fiber channels; performing integrity verification on the data frame at a receiving end, and dynamically allocating and storing a physical address; and responding to an upper computer instruction, executing storage data export or specified block erasing operation, and exporting a data additional equipment digital signature and a storage physical address. According to the invention, the collection precision and storage security of the data in the transient event can be improved.

The invention discloses a signal extension device, a USB optical fiber extender and a method, and relates to the technical field of data transmission, the signal extension device comprises a USB protocol identification module, a processing module and a first output module which are electrically connected in sequence; the first signal extension device is electrically connected with the transmitting equipment; the USB protocol identification module is used for distinguishing a protocol version of a USB signal sent to the first signal extension device by the sending equipment; the processing module is used for processing the USB signals of different protocol versions and forwarding the USB signals to the first output module; and the first output module is used for transmitting the USB signal processed by the processing module to the second signal extension device through the optical fiber channel, and the second signal extension device carries out signal separation and signal conversion on the USB signal transmitted through the optical fiber channel to obtain a USB signal and transmits the USB signal to receiving equipment. According to the invention, the stability and transmission efficiency of the USB signal through the optical fiber extension link are improved.

A downhole system may include a plurality of conduits configured to interconnect, via at least one stab-in connection, to form at least one fiber channel extending along a portion of a wellbore. The downhole system may also include at least one fiber optic line configured to extend through at least a portion of the fiber channel from a surface position to a downhole position. Further, the downhole system may include a plug secured to leading end of the fiber optic line. The plug is configured to move along the at least one fiber channel in response to fluid pressure in the at least one fiber channel to drive the leading end of the at least one fiber optic line along the at least one fiber channel from the surface position to at least the downhole position.

The invention relates to the technical field of optical communication, in particular to a multi-core optical fiber fan-in and fan-out device and a processing method thereof. The multi-core optical fiber fan-in and fan-out device comprises a multi-core optical fiber insertion core piece, a multi-core optical fiber, a plurality of single-core optical fibers and a plurality of three-dimensional miniature optical path elements. A plurality of optical fiber channels are arranged in the multi-core optical fiber insertion core part, the multi-core optical fiber and the single-core optical fibers are inserted into the optical fiber channels respectively, and the end faces of one ends of the multi-core optical fiber and the single-core optical fibers extend out of the optical fiber channels; each fiber core of the multi-core optical fiber is connected with the fiber core of each single-core optical fiber through the three-dimensional micro optical path element, and optical interconnection between the fiber core of the multi-core optical fiber and the fiber core of the single-core optical fiber is realized through the three-dimensional micro optical path element, so that a fan-in and fan-out function is realized; the three-dimensional micro optical path element is directly processed on the end face of each fiber core in a two-photon polymerization processing mode. According to the fan-in and fan-out device provided by the invention, the loss of each channel is uniform, secondary coupling alignment is not needed, the processing difficulty is low, and the efficiency is high.

The invention discloses a distributed optical fiber-grating-based rockburst test system and method, solves the problem that in the prior art, only strain parameters are simply obtained in a rockburst test, and has the beneficial effects of accurately simulating rockburst and obtaining related parameters of the rockburst. According to the specific scheme, the rockburst test system based on the distributed optical fiber-grating comprises a test device, the test device comprises a vibration table, and the vibration table supports a supporting box body; the rock sample is provided with an optical fiber channel, and the distributed optical fiber penetrates into the optical fiber channel; the vibration table, the stress applying component and the drilling disturbance component are respectively connected with the control unit; the monitoring unit is connected with the distributed optical fiber and the grating optical fiber; the monitoring unit sends monitored data to the control unit, and the control unit judges when rockburst is triggered and obtains stress change, elastic strain energy release amount and strain abrupt change time difference at the moment of rockburst when the rockburst occurs.

The present invention relates to a microchannel type pressure-vibration composite optical fiber F-P sensor and a preparation method thereof. The sensor includes a first structural layer, a second structural layer, and a third structural layer. The third structural layer includes a silicon wafer, on which a microchannel group, a water inlet hole, and an optical fiber channel hole are provided. The water inlet hole penetrates through the silicon wafer and is communicated with the microchannel group. The second structural layer includes a glass sheet, and a plurality of cavity holes and optical fiber channel grooves are provided on the outer peripheral edge of the glass sheet. The optical fiber channel groove is communicated with a part of the cavity holes. One side of the glass sheet is attached to one side of the silicon wafer so that one end of the cavity hole is communicated with the outer periphery of the microchannel group. The first structural layer includes a silicon layer diaphragm, and one side of the silicon layer diaphragm is attached to the other side of the glass sheet to seal the other end of the cavity hole so that the cavity hole forms an F-P cavity. A mass block is attached in a part of the F-P cavity. In the present invention, the microchannel group is communicated with the cavity. When water enters the microchannel group through the water inlet hole, the air in the cavity at one end of the microchannel group is compressed, and the pressure increases, reducing the pressure difference inside and outside the cavity.

Embodiments of the disclosure relate to a cable impedance matching element provided in a flexible cable and, more specifically, may be coupled to an FC and have a blind frame supporting an FC impedance matching element and a plurality of blind blades coupled to at least one side and another side of an edge of the blind frame and may open / close an air layer by tilting of the blind blades.

An optical fiber communication while drilling system and an operation method. The system comprises: a slip ring (5) configured to convert an internal optical fiber channel from dynamic rotation to static transmission, wherein the slip ring (5) at least comprises a stator (5-2) and a rotor (5-3), the rotor (5-3) is configured to be communicated with an optical fiber link and is used for rotating together with a drilling tool during drilling, and the stator (5-2) is configured to receive an optical signal from the rotor (5-3) and output the optical signal for analysis and processing; and an optical fiber cable spool (10) connected to the rotor (5-3) of the slip ring (5) by means of a connecting rod (7) and at least comprising an optical fiber cable storage portion (10-2) and an anchoring mechanism (10-3), wherein the optical fiber cable storage portion (10-2) is used for storing an optical fiber cable, the optical fiber cable storage portion (10-2) is configured to release and retrieve the optical fiber cable downward into and from a wellbore within the drilling tool, and the anchoring mechanism (10-3) is configured to anchor the optical fiber cable spool (10) on the inner wall of the drilling tool when the drilling tool drills, and to disengage from the inner wall of the drilling tool when the drilling tool stops drilling.

The application provides a kind of portable collection device of insulating paper near-infrared diffuse reflectance spectroscopy, belongs to the technical field of spectrum collection, including main casing, cylindrical surface accessory, built-in cavity handle and first optical fiber channel;One end of handle is communicated with the bottom of the rear end of main casing;Two ends of first optical fiber channel are communicated with the bottom of the front end of main casing and the other end of handle respectively;The front center of main casing is provided with main light outlet;There is integrating sphere and halogen lamp light source in main casing;One light outlet of integrating sphere is communicated with main light outlet, and the other light outlet is connected with external spectrometer through first optical fiber arranged along first optical fiber channel;Light inlet and halogen lamp light source are connected through collimating mirror and second optical fiber;Groove is opened in one end face of cylindrical surface accessory, and the other end is cylindrical face;Cylindrical surface accessory is provided with light channel communicated with main light outlet along axis direction.The light outlet of the collection device can be switched to cylindrical face, and perfect fit with the outer surface of insulating paper on site is realized.

The invention relates to a multi-protocol data transmission method based on an optical fiber channel, belongs to the technical field of data transmission, and solves the problems of complex communication network, difficult wiring and various equipment types during multi-protocol data transmission in the prior art. The multi-protocol data transmission method comprises the following steps: querying a plurality of controlled NT nodes, and determining the total data volume required to be sent in the current period; comparing the total data volume required to be sent in the current period with the total data volume capable of being sent, and determining a protocol scheduling mode for data transmission in the current period; and under the control of a protocol scheduling mode, for each protocol type, determining the data volume required to be sent by each NT node and the corresponding priority, and sending the data volume required to be sent by each NT node to the destination NT node of the corresponding protocol type according to the sequence of the priorities from high to low. Data transmission of the nodes of multiple protocols in the optical fiber channel is realized, and the equipment type is simple.

The invention discloses a seed vigor one-by-one detection device based on a micro infrared spectrometer, which comprises a seed disc used for realizing single-seed dispersion positioning of seeds; the array type optical fiber arrangement system comprises light source end optical fibers and spectrometer end optical fibers which are arranged in a two-dimensional array mode; two array type optical fiber collectors; the optical fiber switcher is provided with a fixed part and a movable part which are respectively arranged on two sides of the seed disc; the light source assembly is used for providing, transmitting and collecting a light source for seed detection; and the micro infrared spectrometer is used for carrying out spectral analysis on the collected infrared light. According to the invention, an array type optical fiber arrangement scheme and a programmable optical path switching system are adopted, microsecond-level rapid switching of optical fiber channels corresponding to different seeds is realized through electronic control, the single detection switching time is shortened to microsecond level, and the requirement of large-scale seed activity screening in the agricultural field can be met; and a miniature infrared spectrometer and a special seed tray are adopted, so that the cost of the equipment is reduced.

The present invention belongs to the technical field of cable manufacturing, and in particular to a manufacturing process of a high-speed hybrid optical flexible cable, which includes the following process steps: etching a fiber optic channel pattern on the bare copper or aluminum areas of at least one top flexible printed circuit board and a bottom flexible printed circuit board; synchronously moving the top flexible printed circuit board and the bottom flexible printed circuit board and wrapping the synchronously moving optical fibers therein, and fixing the optical fibers in the fiber optic channel pattern through a prepreg; laminating and connecting the top flexible printed circuit board and the bottom flexible printed circuit board through a lamination process. By using the fiber optic channel pattern and the fixing tool, the present invention realizes the fixation of the optical fibers, and designs a special seam pattern, which can butt the two flexible printed circuit boards, and thus can manufacture high-speed hybrid optical flexible cables with a length of hundreds of meters, suitable for use in a variety of application scenarios.

The application relates to a high-speed data acquisition and storage method, system, device and medium, and belongs to the technical field of signal acquisition and data storage. The method comprises the following steps: acquiring at least one high-voltage probe pulse signal and 24 switch probe signals in real time; attenuating the high-voltage probe pulse signal to the input threshold range of an optical coupling device, and performing signal conversion and electrical isolation to generate a TTL level signal; performing micro-capacitance charging and discharging detection on the switch probe signal to obtain switch probe timestamp data; encapsulating the TTL level signal, the switch probe timestamp data and 64-bit time reference data into a data frame, and transmitting the data frame through a main-backup dual-fiber channel in parallel; performing integrity check on the data frame at a receiving end, and dynamically allocating a storage physical address; responding to a host computer instruction to execute a storage data export or specified block erasing operation, and exporting a device digital signature and the storage physical address. The application can improve the data acquisition accuracy and storage security in transient events.

The utility model belongs to laser cable technical field provides a kind of multi-channel anti-static laser transmission cable pipe, including inner tube, protective layer being wrapped in the outer surface of inner tube and strengthening layer being wrapped in the outer surface of protective layer, inner tube is equipped with the cable channel, optical fiber channel and refrigerant channel through interval along length extension direction, inner tube is polytetrafluoroethylene hose, inner tube is uniformly provided with conductive particle, strengthening layer is metal braid layer. Through integrally forming cable channel, optical fiber channel and refrigerant channel on inner tube, the structure of cable pipe can be more compact, also simplify production process and reduce production cost, protective layer can protect inner tube, improve the durability of cable pipe, strengthening layer can improve the hardness, pressure resistance, bending resistance of cable pipe, so that cable pipe is more durable;Conductive particle uniformly distributed on inner tube can make inner tube have longitudinal conductivity and eliminate static electricity, prevent static electricity accumulation due to refrigerant flow, further improve the service life of cable pipe.

The invention relates to the technical field of computer communication, in particular to an airborne fiber channel multi-source video stream hybrid deterministic transmission method. According to the method, an acquisition mode, a cache mode, a cache depth and an enabling state of each path of video are independently configured based on an ICD file; each enabled video acquisition unit acquires video data in parallel according to configuration; performing integrity verification on the video data; storing the data passing the verification into a line or frame buffer area according to the cache mode to form an effective video stream; sending time slot sequences with non-overlapped time axes are dynamically arranged for all the effective video streams, and independent sending timers are set; and responding to the trigger of the sending timer, extracting video line data group frames from the corresponding buffer areas, and sending the video line data group frames through a single optical fiber interface MAC. According to the invention, the hybrid deterministic transmission of the multi-source heterogeneous video stream on the single optical fiber is realized, the wiring is simplified, the controllable transmission time sequence is ensured, and the delay is predictable.

The invention discloses a double-regulator multi-parallel power bridge PWM (Pulse Width Modulation) synchronization method, which comprises the following steps of: monitoring running state information of a first regulator and a second regulator in real time, and performing main regulator and standby regulator arbitration on the first regulator and the second regulator based on a preset priority strategy, the first regulator or the second regulator is a main regulator; the main regulator generates a reference PWM carrier signal and sends the reference PWM carrier signal to the standby regulator and the plurality of parallel power bridge controllers through an optical fiber channel; the standby regulator tracks the reference PWM carrier signal of the main regulator in real time, and keeps phase synchronization of the PWM carrier signal of the standby regulator and the reference PWM carrier signal of the main regulator; each parallel power bridge controller receives the signal and selects a primary reference for modulation. When any regulator breaks down, the system is automatically switched (from primary to standby), the single-point fault risk is thoroughly eliminated, and stable output of a reference signal is ensured.

The invention belongs to the technical field of optical fiber communication of power system protection devices, and provides an optical fiber channel monitoring device, an optical fiber channel monitoring system and an optical fiber channel monitoring method. The monitoring device provided by the invention belongs to a welding device with a built-in optical fiber channel on-line monitoring function, a protection optical fiber welding function module and an optical fiber channel on-line monitoring function module are integrated, no additional discrete components are added, the optical fiber breakpoint risk is reduced, and the monitoring device has the characteristics of light weight and integration. In addition, the device can carry out power compensation on optical signals, and the problem of weak long-distance transmission optical signals is solved.

The application discloses a synchronous trigger circuit and system suitable for dam safety dynamic monitoring network equipment, the circuit comprises a current loop communication circuit, a fiber communication circuit and an output port driving bus. The current loop communication circuit can receive the synchronous trigger signal transmitted by the main control device or the upper level network equipment in the form of current loop and / or fiber channel, and simultaneously can forward the received synchronous trigger signal to the next level network equipment in the form of current loop and / or fiber channel; the fiber communication circuit can receive the synchronous trigger signal transmitted by the main control device or the upper level network equipment in the form of fiber, and simultaneously can forward the received synchronous trigger signal to the next level network equipment in the form of fiber and / or current loop channel. The output port driving assembly can transmit the synchronous trigger signal to the local network equipment, and realize the synchronous trigger of the local network equipment and other network equipment in the link. The application supports the mixed form transmission of current loop and fiber, the communication mode is flexible, the signal has strong anti-interference property, and is suitable for long distance transmission.