106results about How to "Signal transmission distance is long" patented technology

The present invention discloses a array type multi-point temperature monitoring system, including a plurality of monitoring devices, each of which is connected with a temperature sensor measuringline cable of 1000m at longest, each measuringline cable may drive at most 50 of single bus temperature sensors, the temperature sensor is capable of detecting the temperature information of the position where the temperature sensor locating, and the temperature data is transmitted to the monitoring device with a singlechip as a control kernel through a single bus data transmission protocol. The monitoring device has functions of data display, data memory, parameter enactment, overrun alarm, data transmission and the like. The monitoring devices combine a network through RS-485 communication bus, and are connected to a computer host by RS-485 / RS-232 protocol converters, and RS-232 bus to form the array type multi-point temperature monitoring system. The array type multi-point temperature monitoring system is used for situation with a large area multi-point temperature monitoring requirement.

The invention discloses an optical fiber raster anchor rod dynamometry device and an application method thereof, wherein, a manometer is connected with an oil pipe; a horizontal pipe is connected with a hydraulic cylinder; an anchor rod is inserted in the inner hole of the hydraulic cylinder; an vertical pipe is connected with an optical fiber raster sensor; the inside of the shell of the optical fiber raster sensor is connected with a cladding and a fiber core which is connected with a raster; the two ends of the fiber core are connected with an optical fiber raster sensing network analyzer and a computer. In the dynamometry device and the application method, an optical fiber raster demodulator detects the variation of the wavelength and converts the variation of the wavelength into an electrical signal; the optical fiber raster sensing network analyzer calculates the stress and strain of a point to be tested and a distribution state in the whole point to be tested; an optical fiber raster wavelength demodulation analyzing soft reads a testing data; a unitary linear regression model is established for getting the stress and strain value of the point to be tested under the action of external force, the invention has a simple structure, low cost and good anti-interference performance. Multi-parameter sensing measurement has a measurement with high precision and stable performance, which can be largely applied to the field of mine, tunnel or side slope, etc., and the signal can be transmitted far.

A device applied to the corn quality grade detecting, especially applied to imports and exports , the department of store and transportation , purchase, detect and production ,to detect the moisture content etc., bulk density and quality grade of corn such as maize and wheat, including moisture detect element, weighing element, volume measure element , vibration transport element, charging hopper , outer covering , computer data handling element etc. Its characteristic is that transporting the material waiting for detecting to volume measure element by using mini-type vibration transport device equably, ascertain the quality grade of the corn according to the real bulk density and moisture content of the corn entering volume measure element. Putting the material waiting for measuring into a charging hopper first, transducing the moisture content and temperature of the material by interdigited capacitor counter electrode in the inner side of charging hopper's back, the measure result is transmitted to the computer data handle element by the highway; The tiny vibrator works to make the silo resonating under the shaking excitation , the material in charging hopper drop into capacity cups equably from the silo and the take-up pan, close the mains switch after the capacity cups is full of material, inserting the flashboard into the slot under the take-up pan, taking away the unnecessary material lightly from the take-up pan, the slot and the pan; After the electronic scale is stable, reading the quality and the bulk density of the material waiting for measuring from the electron digital display, transmitting the result of the quality and the bulk density to the computer data handling element by the highway at same time; Finally, the computer data handling element decides the grade of the corn according to national standard GB1353 , GB1351, and the information such as moisture content , the temperature , the bulk density.

The invention discloses a multi-paired line co-transportation method and a delivering end and a receiving end. A multi-paired line co-transportation method, wherein N pairs are set as N greater than or equal to 2, includes that the delivering end divides the data to be delivered into N+M parts to encode respectively, then N+M encoded signals are obtain to be modulated respectively, and the modulated signals are delivered to the receiving end via N-paired lines, wherein M is larger than or equal to 1; the receiving end demodulates and decodes the received signals to recover the delivered data. The delivering end comprises a modulator set and a deliver set, and also comprises a encoder set and a selecting combiner set. The receiving end comprises a modem set and a receiver set, and also comprises a decoder set and a deselecting combiner set. The invention increases the combined transportation capacity of multi-paired lines.

The invention provides a remotely-operated submersible and a remotely-operated submersible system and relates to the technical field of submersibles. The remotely-operated submersible comprises a submersible body and a water surface floater. The water surface floater comprises a wired communication interface and a wireless communication interface, wherein the wired communication interface is connected with the submersible body through a cable; the wireless communication interface is used for being connected with a wireless network and is in communication with a far-end control terminal through the wireless network so that the water surface floater can transmit signals between the submersible body and the control terminal, and it can be achieved that the control terminal wirelessly controls the submersible body. The submersible body collects data according to control signals sent by the control terminal and sends the collected data to the control terminal through the water surface floater. According to the remotely-operated submersible and the remotely-operated submersible system, the water surface floater serves as a signal relay, the signal transmission distance is enlarged, and thus the working range of the remotely-operated submersible is expanded.

The invention discloses railway slope landslide information collection and early warning systems based on distributed fiber sensing. The collection system comprises a linear continuous monitoring sequence and a control cabinet; the linear continuous monitoring sequence is composed of fiber sensor buried in the slope structure at one side of a railway in an M shape, and the slope condition can be comprehensively and effectively monitored without omission; and the control cabinet comprises an optical path module which can generate pumping laser pulses, a circuit module which controls the optical path, and a communication module which transmits data to a monitoring room. The system monitors deformation of the railway slope via the fiber sensors which are buried in the distributed manner, and transmits collected information to the control cabinet in real time via the wireless communication module; the system can effectively forecast slope landslide, and predict possible slope landslide according to trends of data; and the systems are characterized by high stability, high anti-interference capability and long signal transmission distance.

The invention discloses a digital subscriber line access multiplication device. It includes subscriber side wideband service processing model, splitting and multiplexing model, memory, network side process model. The invention extends the multiplexing device with a long distance, thus the transmission distance an be prolonged; at the same time, to the places without fiber and idle optical transmission resources, it needs not to use large amount of human power and object to lay fiber or increase optical transmission device, and it can cater the wideband service demands. The invention also discloses the transmission method for the digital subscriber line access device.

The invention discloses an intelligent acoustic emission continuous monitor for the stability of materials such as rock, concrete, metal structure, and the like, in particular a motor for carrying out damage-free monitoring for the materials such as rock, concrete, metal structure and the like so as to predict the stability of the materials. The acoustic emission technique can realize real-time continuous rock monitoring and precisely analyze acoustic emission collecting data. The invention uses acoustic emission measuring theory to collect and monitor the characteristics of the parameters such as number of acoustic emission events, number of key events, acoustic emission rate, and the like. The monitor automatically calculates through a microprocessor, displays and stores typical acoustic emission parameters (number of acoustic emission events, number of key events and acoustic emission rate) in real time; a FLASH flash memory with 64 M capacity can continuously store data for 2-3 months. The data stored by the intelligent acoustic emission continuous monitor is analyzed and processed through self-developed PXAE rock acoustic emitter software.

The invention discloses a coal mine goaf top plate strain monitoring system and method based on fiber bragg grating sensing, and belongs to a coal mine top plate strain monitoring system and method. The system comprises a fiber bragg grating demodulation instrument, a monitoring computer, a mining transmission optical cable, a communication optical fiber and tail optical fibers, wherein a plurality of monitoring points are arranged in a goaf top plate; each monitoring point is provided with one fiber bragg grating strain sensor; the sensors in the monitoring points are connected in parallel through the tail optical fibers which access the mining transmission optical cable through optical fibers; the mining transmission optical cable is connected to an input end of the fiber bragg grating demodulation instrument on the ground; an output end of the fiber bragg grating demodulation instrument is connected with the monitoring computer; and the monitoring computer constitutes a fiber bragg grating strain monitoring system of coal mine goaf top plate all-fiber communication. The coal mine goaf top plate strain monitoring system and method based on the fiber bragg grating sensing have the advantages that all-optical measurement and optical fiber transmission are adopted, so that the influence of electromagnetic interference is avoided; equipment does not require power supply, so that essential safety of working face production is ensured; and real-time monitoring and analysis of coal mine goaf top plate strain are realized.

The invention provides a magnetic rod antenna. The magnetic rod antenna comprises a magnetic rod and a wire, wherein a plurality of parts of the wire are sequentially wound around the magnetic rod to form a plurality of coils in an alternately sparse and dense manner, and the magnetic field intensity of the plurality of coils laminated on division magnetic fields of respective cross section of the same magnetic rod is higher than the magnetic field intensity of the total magnetic field of the coil formed by uniformly winding the existing wire around the magnetic rod. The magnetic rod antenna provided by the invention is longer in signal transmission distance, and is not susceptible to the interference of an outside environment; and moreover, with the magnetic rod antenna provided by the invention, the magnetic flux of the antenna can be improved.

The invention discloses an unmanned aerial vehicle stereoscopic vision follow-up system applied to disaster area searching. The system comprises an unmanned aerial vehicle follow-up platform, a remotecommunication system and a local control platform; the system realizes an operation of transmitting a head posture to an unmanned aerial vehicle through a local operator by using a base station, controls a camera to move in an accompanying way, and transmits audio-video on the unmanned aerial vehicle to the local video glasses and a Bluetooth headset; and meanwhile, the wireless control distanceis prolonged and the stability is improved by combining the algorithms of filtering and compressing the audio-video; the system is suitable for performing searching, rescuing and like work on disasterareas difficult to reach by the personnel and bad in signal receiving; the depth perception and the stereoscopic impression on the field are enhanced, and some special tasks with high field picture requirement can be conveniently accomplished.

This invention relates to a radio RF identification system including a reader, a first antenna, a second antenna and an identification controller, in which, the first antenna is connected with the reader generating control signals and transferring them via the first antenna, the second antenna receives the signals and the identification controller is integrated in the circuit elements of a portable electronic device and connected with the second antenna and selects a data signal based on the control signal to send it to the reader via the two antennas, which can avoid the traditional strip or wear of RFID labels to transmit signals even further.

The invention discloses a tire pressure gauge and air faucet connecting structure which comprises a universal head, a conductive coating film, a first mating piece and an insulating fixing piece; the universal head is arranged on the tail end of the axial direction of the air faucet, and is provided with a second mating piece; the conductive coating film is fixed on an outer shell, and comprises a film body, a tongue piece which extends into the outer shell form the film body and is electrically connected with a transmission circuit in a circuit board, and a guide groove penetrated to the film body; the film body is provided with an inner concave spherical surface and an outer convex spherical surface; the universal head is universally connected with the inner concave spherical surface, and is concentric with the outer convex spherical surface; the first mating piece comprises a limiting piece; the insulating fixing piece is sleeved on the periphery of the air faucet so that the air faucet is fixed with a hub in an insulating way; the two mating pieces are mutually fixed in a matched way through the guide groove; and the signals of the transmission circuit of the tire pressure gauge are transmitted to the space sequentially through the conductive coating film, the first mating piece, the second mating piece, the universal head and the air faucet. The tire pressure gauge and air faucet connecting structure can ensure the high-efficiency and reliable transmission of the signals while ensuring the tire pressure gauge and the air faucet are stably connected and rotate flexibly, and can minimize the economic losses caused by the hitting to the tire pressure gauge.

The invention discloses a real-time monitoring device for the bridge deflection based on laser signals, which comprises a laser signal transmitting unit (1), a signal receiving unit (2), an information processing unit (3) and a display and alarm unit (4), wherein the laser signal transmitting unit (1) comprises a laser signal source (11), a beam expanding lens system (12) and a signal source power supply (13), the laser signal transmitting unit (1) is placed below a midpoint of a monitored bridge (6) so as to reflect the bridge deflection, the signal receiving unit (2) comprises an imaging lens system (21), a displacement sensor PSD (22) and a micro current amplifying circuit (23), the information processing unit (3) is connected with an output end of the signal receiving unit (2), and the display and alarm unit (4) is connected with an output end of the information processing unit (3). The real-time monitoring device has the advantages of long monitoring distance, high precision, high anti-interference ability, simple structure, convenient installation, real-time data display, automatic early warning and the like.

The invention relates to a wireless spread spectrum intelligent household meter, a remote gas meter system and a control method. The household meter includes a power supply, a controller, a storage module and a wireless spread spectrum module. The controller is connected with the storage module and the wireless spread spectrum module respectively, and the meter measurement data in the storage module is sent out through the wireless spread spectrum module; it also includes a timer, and the timing output of the timer is connected with the controller and the wireless spread spectrum module respectively. The state control terminal of the spread spectrum module is connected to make the controller and the wireless spread spectrum module sleep and wake up synchronously. The invention adopts the wireless spread spectrum module, the signal transmission distance is long, the anti-interference ability is strong, the bit error rate is low, and the problem of difficulty exceeding the standard is solved; the timer is used to make the controller and the wireless spread spectrum module wake up at a certain frequency, It saves energy, improves the service life of the power supply, improves the reliability of the networking, and ensures the reliable and efficient operation of the network.

The invention relates to the technical field of household electric appliances, and particularly relates to an intelligent electric lamp and an intelligent home control system. The intelligent electric lamp comprises an electric lamp body, a wireless transceiving module and a control module; the hue and the light intensity of the electric lamp body are controllable; the wireless transceiving module is used for receiving external control signals; the control module is used for controlling the hue and the light intensity of the electric lamp body according to control signals. The intelligent home control system also comprises a wireless control module for controlling the electric lamp remotely; the wireless control module is integrated with a handheld mobile terminal, and is used for sending control signals to the wireless transceiving module through a remote wireless communication mode. The intelligent electric lamp and the intelligent home control system provided by the invention are flexible and good in controllability; a remote controller and the electric lamp are in signal connection by adopting an RFID (radio frequency identification) radio frequency mode, and compared with the infrared ray control mode in the prior art, signals are transmitted farther, and more stably, and can penetrate through walls to control.

The invention discloses an optical fiber displacement sensor and a measuring method thereof. The optical fiber displacement sensor comprises a substrate and an optical fiber sensor; the substrate comprises a fixed plate, a turning plate and a connecting piece; a lower turning plate part is parallel to the fixed plate, a corner is of an obtuse angle in the direction facing the fixed plate, and thefixed plate is connected with the turning plate by the connecting piece through a through hole of the fixed plate and a through hole of the turning plate; a first optical fiber groove and a second optical fiber groove are staggered in parallel, located in the sizes, facing each other, of the fixed plate and the lower turning plate part respectively, and used for fixing the optical fiber sensor; the top end of an upper turning plate part serves as a contact end making contact with a measured object; and the optical fiber sensor comprises an optical fiber, and a first Bragg grating and a secondBragg grating which are etched on a fiber core of the optical fiber. Displacement of the measured object is amplified through the substrate and converted into axial tension to the first Bragg grating.The optical fiber displacement sensor has the advantages of being small in size, free of electromagnetic interference, long in signal transmission distance and high in measurement precision.

The invention discloses a totally-digital laser focusing automatic tracking system. The system comprises a front end sensor, servo motor equipment and a control host. The front end sensor is arranged on a laser device and is used for collecting laser focus signals from the laser device. The servo motor equipment is used for automatically adjusting the focus height of the laser device based on a servo motor. The control host receives the laser focus signals collected from the front end sensor and conducts filtering processing on the signals, then acquires the focus height information of the laser device from the laser focus signals through a recursion average filtering algorithm, and controls the servo motor equipment according to the focus height information so as to automatically adjust the focus height of the laser device. Due to the facts that the front end sensor collects the signals, and the control host processes the signals and controls output signals to be subjected to digital processing completely, the dynamic response speed is high, the signal transmission distance is long, the environment temperature influence is avoided, and measuring accuracy is high. Automatic control is realized, the distance from a laser focus to the central position of the plane of a part is kept unchanged, and processing technique consistency is maintained.

The invention discloses a high-definition video transmission cascading network cable extender. The extender comprises an emitter, at least one cascading unit, and a receiver, wherein the emitter is used for coding a first high-definition video signal input by a high-definition video source into a second high-definition video signal, and coupling the second high-definition video signal to a first network cable; the cascading units are connected in series, an input end of the cascading unit(s) is connected with the emitter through the first network cable, and the cascading unit(s) is / are used for amplifying the second high-definition video signal into a third high-definition video signal; and the receiver is connected with an output end of the cascading unit(s) through a second network cable, and is used for decoding the third high-definition video signal into a fourth high-definition video signal and outputting the fourth high-definition video signal to electronic equipment for playing. The extender provided by the embodiment of the invention has the advantages that after signal amplification through the cascading unit(s), a signal transmission distance can be extended (experiments show that the transmission distance can be extended by 50 meters through each cascading unit), so that ultra-distance high-definition video transmission can be achieved.

The invention discloses a theodolite type laser coarse pointing mechanism which comprises a pitch axis assembly and a pitch auxiliary supporting assembly which are installed on the two side walls of aU-shaped frame respectively. An azimuth axis assembly penetrates through the bottom face of the U-shaped frame to be installed, the two ends of the load are respectively connected with the pitching shaft assembly and the pitching auxiliary support assembly, and the two ends of a pitch axis locking arm are respectively connected with the load and a pitch axis locking and releasing device. A coil part and an armature part of a parking electromagnet are respectively connected with the pitch axis locking and releasing device and the pitch axis locking arm, the two ends of the azimuth axis lockingarm are respectively connected with the U-shaped frame and the azimuth axis locking and releasing device, and a light path assembly is arranged at the outer side of the pitching auxiliary supportingassembly. According to the invention, the problems of low data transmission rate, low tracking precision, poor long-distance communication quality, slow response speed, low tracking bandwidth, much signal energy dissipation, larger space size, high transportation and emission cost and the like of a traditional radio frequency antenna turntable communication device are solved.

A 5G intelligent street lamp control system for a smart city comprises a control circuit composed of a main chip and a main chip peripheral circuit, and the main chip peripheral circuit comprises a clock circuit, an LED indicator lamp circuit, a USB to serial port module circuit, a battery charging circuit, a voltage division circuit, an SRAM circuit, a JTAG circuit, a reset circuit, a peripheralcircuit which is composed of a display circuit, a memory circuit, a camera circuit, an alarm circuit, a sensor circuit, a key circuit and a relay driving circuit, and a communication circuit which iscomposed of a WiFi module circuit, a 5G communication module circuit, a GPS module, an internet access module circuit, a wireless module circuit, a Bluetooth module and an NB-IOT module. According tothe invention, the 5G communication technology and the Internet of Things technology are used to realize the technical effects of intelligent street lamp energy saving and real-time operation condition feedback so as to ensure timely maintenance and energy consumption feedback of the faulted street lamp.

The invention discloses a neuron directional growth and nerve terahertz signal excitation integrated chip, which comprises a sensing chip unit and a microfluidic cell culture unit. The sensing chip unit comprises a silicon dioxide substrate and a gold film layer, the gold film layer is etched with a nanopore periodic array structure, the nanopore periodic array structure is composed of multiple groups of double nanopores which are arranged in a periodic array, the gold film layer is combined with a micron-sized microfluidic channel to form an area for controlling the growth of neurons, and the growth of the neurons in some directions is stopped or promoted by using the micro mechanical force of a special microfluidic channel structure. The growth speed of the neurons is further regulated and controlled by using an external terahertz electromagnetic signal and a biological guidance factor. According to the invention, directional growth of neuronal axons in the micro-nano precision of the sensing chip is realized, the nanopore part of a sensing element and neuronal protein molecules to be detected are positioned in nano precision, and integration of excitation and detection of terahertz signals, acoustic signals and electric signals in nerve cell culture is realized.

The invention provides a large-mining-height stope coal wall rib spalling depth measurement method, which is suitable for coal wall rib spalling depth monitoring and prevention under a large-mining-height condition. The method is characterized by selecting one rib spalling measurement point every a certain distance on a large-mining-height working face; mounting a glass fiber reinforced plastic anchor rod uniformly provided with fiber grating sensors on a coal wall; carrying out real-time transmission data analysis through a computer to obtain stress and its variation of each section of the anchor rod; and according to the phenomenon that the anchor rod section corresponding to the rib spalling section decreases in stress, obtaining depth range of the rib spalling. The method monitors therib spalling depth on the basis of preventing coal wall rib spalling, and provides favorable conditions for safe and efficient mining of the large-mining-height working face.

The invention relates to the technical field of optical fiber sensing monitoring and diagnosis application, in particular to an optical fiber sensing system and multi-parameter monitoring method for a reciprocating compressor. The optical fiber sensing system comprises a computer, an optical source module, an optical ring device, a signal demodulation unit, a branching unit and a sensing module. The branching unit is connected with the optical source module, the sensing module and the signal demodulation unit through optical fibers. The signal demodulation unit is connected with the computer through a data line. The sensing module comprises an optical fiber F-P acceleration sensor, FBG displacement sensors, an optical key phase sensor and an FBG temperature sensor. The optical fiber sensing system is reasonable in structure, and an optical fiber sensor has the beneficial effects of being small in size, high in anti-electromagnetic interference capacity, wide in frequency response range, high in precision and the like; and a multipoint distributed multi-parameter measuring manner is adopted in a monitoring system, the real-time change quantity of phase change parameters on key positions is acquired, a failure expert diagnosis and alarm system analyzes and diagnoses a failure source and a failure type, and effective failure type information early warning reminding is carried out.

The invention relates to a security protection system based on a magnetic sensor and belongs to security equipment. The security protection system is divided into two parts, namely a magnetic signal acquisition end and an alarm signal receiving end. The security protection system comprises a magnetic signal acquisition module, a magnetic signal processing module, an alarm signal sending module, an alarm signal receiving module and a terminal light emitting diode (LED) and buzzer alarm module, wherein the magnetic signal processing module is implemented by a microprocessor through a buffer queue smoothing technology; the alarm signal sending module adopts a sending mode of the microprocessor; the alarm signal receiving module adopts a receiving mode of the microprocessor; and a terminal alarm module adopts a microprocessor LED and buzzer driving technology. The security protection system has the advantages of low cost, long signal transmission distance, high sensitivity, high stability, high anti-interference capacity, low power consumption, and high environment adaptability; manual configuration of parameters is not required; and the security protection system can be immediately used after installation.

The invention discloses a portable potentiostat application platform based on vitamin B detection and aims to overcome defects of low measurement precision and large control errors of an existing potentiostat. The portable potentiostat application platform is characterized in that a power module is connected with a power input end of a microcontroller module; a D / A (digital-to-analog) conversion module converts digital quantity of the microcontroller module into analog quantity and transmits the analog quantity to an operational amplifier detection module; an A / D (analog-to-digital) conversion module converts sampling data of the operational amplifier detection module into digital quantity from the analog quantity and transmits the digital quantity to the microcontroller module; pull-in of a relay unit module is controlled through switching of high and low levels of a PC port in the microcontroller module, so that the connection state of a working electrode of the operational amplifier detection module is controlled; a key display module sends set parameters to the microcontroller module for processing and displays data received from the microcontroller module; an RS485 transmission module is connected with the microcontroller module and transmits detected signals to a GPRS (general packet radio service) wireless communication module. The portable potentiostat application platform based on vitamin B detection can detect trace vitamin B and can be combined with an electrochemical impedance test system for application.

The invention discloses an unmanned ship carrying an underwater vehicle, and relates to the technical field of unmanned ships. The two buoyancy cabins of the unmanned ship are oppositely arranged andconnected through a connecting frame, and propellers are arranged at the bottoms of the buoyancy cabins. The lifting platform is composed of an ROV bearing platform and a lifting device, the ROV bearing platform is connected with the lifting device, and the lifting device is connected with the connecting frame; the control box is arranged on the connecting frame, and the lifting device and the propeller are in signal connection with the control box. An instruction of the mobile terminal is transferred to the underwater vehicle through the control box so that the interference on a control signal is reduced, and the signal transmission distance is expanded; the buoyancy cabin provides buoyancy for the unmanned ship, the unmanned ship is driven by the propeller to travel on the water surface,the underwater vehicle is carried by the lifting platform, the ROV bearing platform is large in area, and the success rate of butt joint with the ROV is high; the lifting or overturning of the lifting platform is controlled by the lifting device so that the lowering and recycling of the ROV are completed; the unmanned ship is compact in overall structure, small in occupied area, low in manufacturing cost and beneficial to market popularization.

The invention discloses a multi-camera synchronous triggering system, which comprises a plurality of synchronous triggering modules. Each synchronous triggering module is connected with a to-be-triggered camera; the synchronous triggering module comprises a main control chip, a communication module and a triggering module, and the communication module and the triggering module are respectively connected with the main control chip; the communication module receives an instruction data packet sent by an upper computer and transmits the instruction data packet to the main control chip, and the main control chip analyzes the instruction data packet and judges whether to send a triggering signal to the triggering module or not according to the analyzed instruction data; the triggering module isconnected with the camera, and triggers the camera to start to collect images after receiving the triggering signal. According to the technical scheme, any multiple cameras can be triggered synchronously, scheduling of an operating system is not needed, time delay is avoided, the real-time performance is high, two triggering channels of a network broadcast triggering mode and an RS485 triggeringmode are designed, and the flexibility of the system is improved; therefore, the system can be suitable for a camera with a network interface and can also be compatible with a camera without a networkinterface.

A prefabricated assembly grouting sleeve capable of monitoring grouting fullness and stress variation and a manufacturing method thereof. The prefabricated assembly grouting sleeve comprises a grouting sleeve body, a fiber bragg grating sensor and an interrogator. The two ends of the grouting sleeve body are both reinforcing steel bar inserting ends, two end ports of the grouting sleeve body are provided with a sealing ring and a sealing end cover correspondingly, and the sealing end cover and the grouting sleeve body are connected through threads. A grouting opening and a slurry outlet are formed in the side faces of the two ends of the grouting sleeve body. A positioning pin and an aligning pin are arranged in the middle of the grouting sleeve body. The fiber bragg grating sensor is arranged on one side of the slurry outlet, and the fiber bragg grating sensor is in circuit connection with the interrogator through an outgoing cable. According to the prefabricated assembly grouting sleeve, the grouting fullness can be monitored during engineering construction, the bearing condition of the prefabricated assembly building and the environmental temperature and humidity variation can be monitored in real time according to needs in the using and maintaining process, and a reliable basis is provided for maintaining and safety of the building.