1193 results about "Time-division multiplexing" patented technology

The invention provides a time division multiplexing multi-parameter synchronous sensing method and system based on a multi-core optical fiber. A multi-core optical fiber containing three heterogeneous fiber cores is embedded into a measured object, and a distributed reflection grating array forming an inclined angle with the axial direction is inscribed on the surface of each fiber core; energy exchange data between modes of all fiber cores and reflection grating wavelength shift signals are synchronously collected by adopting a time division multiplexing technology, phase difference signals are extracted through a cross correlation algorithm to serve as curvature reference values, dynamic compensation operation is carried out on the wavelength shift data and the phase signals, and accurate strain distribution is obtained after temperature interference is effectively eliminated; a coordinate transformation model is established by combining the three-dimensional geometric parameters of the spiral optical fiber, vector synthesis is performed on the curvature reference and the strain parameters, and accurate reconstruction of the three-dimensional deformation field of the measured object is realized. According to the technical scheme provided by the invention, through multi-core fiber multi-parameter synchronous sensing and three-dimensional coordinate mapping, temperature self-compensation high-precision three-dimensional deformation field real-time reconstruction is realized.

The invention relates to the technical field of unmanned aerial vehicle communication, and discloses a dynamic spectrum frequency hopping communication method and device for a target aircraft and a ground station, and the method comprises the steps: collecting state information; evaluating a signal quality indicator based on the power data; based on the total spectral range and the signal quality index, segmenting the total spectral range into N sub-bands to obtain a spectrum allocation result; based on the task priority and the communication quality index, carrying out main target machine election; each target machine sends an orthogonal detection sequence in a corresponding time slot to obtain channel state information; converting the channel state information into a frequency hopping key; generating a frequency hopping sequence based on the frequency hopping key; according to the invention, an adaptive frequency hopping technology based on a channel state is adopted, the channel quality is monitored in real time, and a dynamic frequency hopping sequence is generated, so that an interference frequency band is effectively avoided; through a time division multiplexing channel detection mechanism, signal overlapping is fundamentally avoided, and continuous and stable operation in a complex dynamic environment is ensured.

The invention relates to the technical field of gas monitoring, and discloses an air quality monitoring method based on an olfactory chip, which comprises the following steps: step 1, preparing a multi-modal sensor system which comprises an olfactory chip module, a surface enhanced Raman scattering module and a microfluidic time division multiplexing module, the sensor surface of the olfaction chip module is modified with a metal organic framework material, and the substrate of the surface enhanced Raman scattering module is made of a core-shell structure nano material; and 2, synchronously collecting resistance response data of the olfaction chip module, spectral data of the surface enhanced Raman scattering module and temperature, humidity and wind speed data of the environment sensor. According to the invention, a multi-modal sensor cooperative detection technical scheme is adopted, the high-sensitivity detection effect on low-concentration harmful gas in air is achieved, and compared with a technical scheme of a single sensor and a fixed fusion algorithm in the prior art, the defect that accurate recognition of trace gas cannot be realized under ppb-level concentration is overcome.

Methods and systems are disclosed for resource management on Sidelink for vehicle to everything (V2X) scenarios. Example methods and systems for a Resource Structure on Sidelink are disclosed. Control and data channels may be Frequency Division Multiplexed (FDMed) or Time Division Multiplexed (TDMed) with an Orthogonal Frequency Division Multiplexing (OFDM) waveform. Example methods and systems for a Resource Configuration on Sidelink are disclosed. The resource configuration may be statically configured or may be locally configured. Example methods and systems for Assisted Resource Allocation are disclosed. Assisted Sensing may be performed by a group lead or RSU and local scheduling may be performed by a group lead or RSU.

The utility model discloses fixed wiring terminal automatic assembling equipment which comprises a machine frame, a base body feeding vibration disc and a metal sheet feeding vibration disc, a station adjusting assembly is arranged on the machine frame, and an assembling positioning tool is connected to the station adjusting assembly. A transverse transmission assembly, a longitudinal transmission assembly and a discharging station are arranged on the periphery of the station adjusting assembly. A base moving and taking assembly is arranged on the transverse transmission assembly, and a metal sheet moving and taking assembly and a screw assembling assembly are arranged on the longitudinal transmission assembly. According to the fixed type wiring terminal automatic assembling equipment, full-process closed-loop automatic production including feeding, assembling, rotating, secondary assembling and discharging is achieved, the longitudinal transmission assembly is responsible for metal sheet moving and taking and screw assembling, the longitudinal transmission assembly and the longitudinal transmission assembly share a longitudinal rail, time division multiplexing and efficient connection are achieved, the station adjusting assembly automatically adjusts an assembling positioning tool, and the assembling efficiency is improved. A single set of equipment can complete double-sided assembly, multi-process parallelism and spatial multiplexing of the wiring terminal step by step, and the production takt of the wiring terminal is greatly reduced.

The invention provides a high and low temperature alternating environment temperature and pressure mixed signal decoupling method and system based on a multi-core optical fiber. According to the method, temperature and pressure mixed signals are synchronously acquired through phase difference data of a plurality of fiber cores, and multi-channel mixed sensing signals are generated; performing mechanical stress suppression on the multi-core optical fiber by using a thermal expansion adaptive packaging structure to form an anti-deformation optical fiber assembly; carrying out adaptive time slot distribution on the mixed sensing signal based on a time division multiplexing time sequence to generate a synchronous calibration signal; spectral features of the synchronous calibration signals are separated through the spectral analysis technology, scanning parameters are dynamically adjusted in combination with the temperature change rate and the deformation quantity, and temperature and pressure feature data are extracted; and performing decoupling operation on the feature data through the coupling model, and dynamically correcting the model parameter weight based on the deformation quantity feedback data to obtain a temperature parameter and a pressure parameter. According to the invention, the accuracy of synchronous decoupling measurement of temperature and pressure in a high-low temperature alternating environment is realized.

Disclosed in the present invention are a method for transmitting / receiving downlink data in a wireless communication system, and a device therefor. Specifically, a method of receiving downlink data by user equipment (UE) in a wireless communication system comprises the steps of: receiving configuration information; receiving downlink control information (DCI), the DCI comprising a transmission configuration indication (TCI) field, and multiple TCI states being indicated on the basis of the TCI field; and receiving multiple transmission occasions of an identical transport block on the basis of the DCI. The multiple transmission occasions are received through a time-domain resource on the basis of time division multiplexing (TDM), and the number of the multiple transmission occasions is determined on the basis of the number of the multiple TCI states.

A mixed-signal in-memory computing sub-cell requires only 9 transistors for 1-bit multiplication. In one aspect, a computing cell is constructed from a plurality of such sub-cells that share a common computing capacitor and common transistors. As a result, the average number of transistors in each sub-cell is close to 6. Also proposed is a MAC array for performing MAC operations, which includes a plurality of the computing cells each activating the sub-cells therein in a time-multiplexed manner. Also proposed is an in-memory mixed-signal computing module for digitalizing parallel analog outputs of the MAC array and for performing other tasks in the digital domain.

The present application relates to a device and method for monitoring and early warning Low-power-consumption landslide collapse based on time division multiplexing, comprises: a camera equipment is configured to obtain monitoring images; a RF front-end is configured to transmit and receive radar signals; an intelligent sleep equipment is configured to set sleep time and power down the equipment(s) connected to it to put into sleep mode when the device requires working in a low power consumption mode; a signal processing equipment is configured to realize interference measurement and Doppler detection in a time division multiplexing manner and generate early warning or forecast information; a 5G equipment and an Ethernet port are configured to send the measurement results and monitoring images to a mobile terminal or host computer. The present application realizes the joint work of Doppler detection and interference measurement within one radar device through adaptive time division multiplexing.

The invention discloses a medical logistics robot task allocation system based on time division multiplexing and dynamic scheduling, which comprises a cloud platform, a plurality of robots and a cabin body replacement station, and is characterized in that the cloud platform adopts a conflict resolution strategy based on priority and time windows on the basis of task time division and class division allocation logic of a mixed AI scheduling algorithm; tasks are dynamically and intelligently distributed according to hospital business laws and real-time states of the robots; the robot communicates with the cloud platform through the communication equipment, various tasks issued by the cloud platform are executed by carrying various cabins, and the tasks comprise material distribution, cleaning, disinfection and polling; and the cabin body replacement station is used for providing cabin body replacement equipment and assisting the robot in replacing the cabin body. According to the invention, tasks can be dynamically and intelligently allocated according to hospital business rules and real-time states of the robots, so that the task processing efficiency and the resource utilization rate are remarkably improved, and the hospital logistics operation cost is reduced.

The invention provides a low orbit constellation autonomous time synchronization method based on a Ka inter-satellite link, and relates to the field of satellite navigation and time frequency transmission, and the method comprises the steps: obtaining a Ka wave band standard timestamp signal of a ground station, and carrying out the taming of a satellite clock, and obtaining a constellation initial anchor node; carrying out distance measurement in two directions by using time division multiplexing, and correcting motion time delay to obtain corrected inter-satellite clock difference data; carrying out clock error data fusion, inhibiting long-term drift, and generating a constellation unified time scale; based on the constellation unified time scale, topology dynamic optimization is carried out, and an optimized network topology is obtained; kalman filtering and polynomial prediction are utilized to maintain a time reference, and an LSTM neural network is combined to predict frequency drift change, so that an autonomous time keeping result is obtained; and verifying an abnormal clock error through majority voting of adjacent nodes, and if the voting fails, isolating a fault and reversely calculating a recovery value. The method is used for overcoming the defect that fiber time frequency transmission in the prior art is limited by ground fixed facilities and cannot be applied to inter-satellite scenes.

The embodiment of the invention provides a message processing method and device, and the method comprises the steps that an interconnection network receives a first request message and a first response message initiated by a first processing unit, and the first request message is sent to a second processing unit by the first processing unit; the first response message is initiated after the first processing unit processes a second request message initiated by the second processing unit, distributing a first sending side virtual channel for the first request message, and distributing a second sending side virtual channel for the first response message, the first sending side virtual channel and the second sending side virtual channel perform time division multiplexing on the physical channel according to a period; the first request message and the first response message are processed through the first sending side virtual channel and the second sending side virtual channel respectively, so that the problem of protocol level deadlock caused by loop dependence in the related technology can be solved, different types of messages can pass through different virtual channels, the dependency relationship between the messages in the cache region is completely relieved, and the message transmission efficiency is improved. And the occurrence of protocol level deadlock is avoided.

The invention provides a bus communication protocol optimization method based on a time division multiplexing technology, which relates to the technical field of bus communication, and comprises the following steps: calculating a time sequence difference value of each pair of nodes according to data packet node information; dividing a time sequence difference value matrix, and dynamically calculating the variable quantity of the weight of a time sequence difference value; performing static time slot division according to a fixed period; dynamic time slot resource allocation is carried out through a time division multiplexing technology in combination with the node pair weight change table; potential time slot conflicts are predicted in combination with historical conflict rate statistical data, and the backoff time is dynamically adjusted. According to the method, node time sequence data are collected in real time, a time sequence difference matrix is constructed, and node weight variation is dynamically calculated in combination with an STDP mapping mechanism, so that intelligent allocation of time slot resources is realized; through a hybrid backoff algorithm of exponential backoff and fixed window constraint, the average conflict probability of a high-conflict time slot group is greatly reduced, the delay fluctuation of a low-conflict time slot group is controlled within a low fluctuation range, and the real-time response and long-term stability of the system are both considered.

The invention discloses a novel pulse reinforcement learning driven unmanned system brain-like intelligent multivariate decision-making method. The method comprises the following steps: respectively establishing a state space, an action space and a reward function of detection identification, material delivery and flight maneuvering tasks; designing a pulse event triggering mechanism according to task characteristics, establishing a pulse frequency adjustment model of various tasks, and constructing a scheduling strategy of time division multiplexing and elastic borrowing; establishing a detection identification model, a material delivery model and a flight maneuvering model; a multi-modal variance index is introduced to dynamically adjust a control signal source by fusing a data strategy and a decision-making mechanism of a prior model; a sliding window state matrix is constructed, task priorities are dynamically calculated, and a unified control instruction is generated in a weighted fusion mode. According to the method, the response capability of the system to the multi-source task is improved, the time sequence independence and the scheduling efficiency of the task are guaranteed, and the stability and the controllability of the unmanned system in a complex environment are enhanced.

Various optical systems for use in a light pulse atomic interferometer (LPAI)-based one-, two-, or three-axis accelerometer or gyroscope are disclosed. As an LPAI accelerometer or gyroscope may employ many different laser beams to implement the LPAI functionality, ways of combining these different laser beams to thereby simplify the optical systems are desired. The cooling laser beam portion of the optical system may be simplified using one or more reflective grating chips. The Raman laser beam optics may be simplified using combiners and separators. For LPAI systems sensing along three axes, various optical switching schemes may be employed, including ones that generate variable data-rates with a primary sensing axis having a higher data-rate than the secondary sensing axes. Further, by combining various laser beams in a time-multiplexed manner, the number of optical fiber tethers to a sensor head may be reduced.

The present invention relates to an ultra-wideband (UWB) radar sensor chip system architecture. The chip system architecture at least comprises N receiving channels and N transmitting channels, wherein N is a positive integer greater than 1, the N receiving channels form receiving links by means of connecting to a receiver multiplexer, the N transmitting channels form transmitting links by means of connecting to a transmitter multiplexer, and the receiving links and the transmitting links jointly form N groups of transceiving systems. The chip system architecture further comprises a serial peripheral interface, and is adjacent to an external main control chip by means of the serial peripheral interface, so as to drive, by means of a control command, the N groups of transceiving systems to operate on the basis of time division or to operate independently. The present invention introduces the concepts of time division multiplexing and multi-channel synthesis into a radar system, and provides a universal UWB radar sensor chip system architecture with a high integration level, a high performance and a low cost, thereby effectively solving the problems of a radar chip in terms of the sensitivity and transmitting power, improving the detection precision and increasing the detection distance.

The invention relates to the technical field of integrated circuits, in particular to a multi-FPGA (field programmable gate array) interconnection method based on a data hub, electronic equipment and a medium. Then, obtaining a time division multiplexing proportional gain for adding a direct connection virtual cable to the group hypothesis of the FPGA with the communication requirement and each virtual path set is not empty, updating the virtual path combination set and the virtual path sets of the groups of all the FPGAs until all the virtual path sets are empty, determining a target path combination, and sending the target path combination to the FPGA; and establishing interconnection between the corresponding FPGAs on the basis of the initial topological structure through the data hub based on the target path combination. According to the method, the system frequency of communication between the multiple FPGAs is improved, and the system performance of communication between the multiple FPGAs is optimized.

The invention discloses a high-resolution and low-delay audio and video transmission method and system, which realize high-quality and low-delay remote audio and video transmission by dynamically negotiating transmission resolution and self-adaptive compression coding. The method comprises the following steps: constructing a resolution negotiation matrix through extended display identification data based on receiving end equipment, and determining an optimal transmission resolution parameter; the compression ratio is dynamically adjusted in combination with network bandwidth fluctuation, a compressed data stream is generated by adopting inter-frame prediction coding, and the anti-interference capability is enhanced through forward error correction and time division multiplexing packaging; and finally, the differential signal pair is transmitted to a receiving end to be decoded and restored into a standard audio and video signal. According to the method, the transmission delay is remarkably reduced while the high-resolution image quality is ensured, the method effectively adapts to a complex network environment, the transmission distance and stability are considered, and the method is suitable for application scenes such as remote conferences and real-time monitoring which have high real-time requirements.

The invention discloses an on-line detection system for glucose content and conductivity, comprising: a two-parameter synchronous detection module integrated in a to-be-detected liquid loop and used for synchronously detecting the glucose content and conductivity at the stages of concentrated solution preparation, inlet filling, cleaning and to-be-detected liquid testing; the real-time detection device comprises a cooperative control module for controlling the signal acquisition time sequence of the glucose content detection and the conductivity detection through time division multiplexing or an independent channel; the compensation calibration module is used for dynamically calibrating sensor parameters based on the concentration data of the real-time standard liquid and compensating a detection result in combination with temperature monitoring data; the data processing module is fused with multi-dimensional data prediction, counteracts cross interference, carries out feedforward compensation on sensitivity attenuation of the sensor in combination with historical data, and outputs a glucose content and conductivity detection result; the multi-dimensional data comprises glucose content, conductivity and temperature. According to the invention, the stability, precision and long-term reliability of online detection are significantly improved.

Embodiments of the present disclosure are related, in general to communication, but exclusively related to methods and systems methods for transmitting a waveform. The waveform is a pre-DFT RS and data multiplexed DFT-S-OFDM with excess bandwidth shaping and MIMO. Also, embodiments of the present disclosure relate to methods of detecting the received data. The method for transmitting a waveform, comprising generating, by one or more transmitters, at least one data sequence and at least one reference sequence (RS). Also, the method comprises time-multiplexing the at least one data sequence with the at least one RS, to generate a multiplexed sequence. Further, the method comprises generating a filtered-extended bandwidth DFT-s-OFDM symbol using the multiplexed sequence. The filtered-extended bandwidth DFT-s-OFDM symbol generated by the one or more transmitters is transmitted in an OFDM symbol.

The invention discloses an FPGA efficient accelerator design method and system based on a sparse convolution kernel, and relates to the technical field of accelerator design. Comprising the steps of optimizing sparse weight storage and management, designing a sparse convolution kernel storage structure and adopting a data organization scheme oriented to output channel optimization; designing a sparse convolution kernel index and scheduling mode, including dynamic row coordinate index storage and an intelligent dynamic scheduling mechanism; and constructing a sparse convolutional layer, wherein the sparse convolutional layer comprises an output channel serial computing architecture and an optimized MAC module. Through collaborative optimization of weight pruning and convolution kernel pruning, an efficient storage mechanism based on a non-zero weight and coordinates thereof is established, the storage requirement is remarkably reduced, and the calculation efficiency is improved; a serial / parallel configurable calculation mode of an output channel is designed, and the time division multiplexing technology of a single MAC module is combined, so that efficient utilization of FPGA logic resources is realized.

A sensor including at least one sensor element configured for measuring an external parameter and outputting one or more results representative for the external parameter, an output buffer configured for receiving the one or more results or a processed version thereof and for applying an analog signal representative for the result or a time multiplexed sequence of analog signals representative for the results on a sensor terminal, and a control circuit configured for obtaining an ID of the sensor, and for receiving a trigger signal, and for determining whether the trigger signal matches the ID of the sensor, and for enabling the output buffer during a predefined period when the trigger signal matches the ID of the sensor.

Embodiments of the present disclosure relate methods and systems for transmitting downlink Orthogonal time frequency-division multiplexing (OTFDM) symbol. The method comprising time-multiplexing, by the transmitter, at least one of a primary synchronization signal (PSS) sequence, a secondary synchronization signal (SSS) sequence and a physical broadcast channel (PBCH) sequence to generate a multiplexed sequence. Also the method comprises processing, by the transmitter, the multiplexed sequence to generate a SS Block OTFDM symbol.

The invention discloses an efficient acquisition and processing system for safety production monitoring data of an electric power steel structure, and the system comprises a space-time sparse sampling module which analyzes the spatial distribution density of monitoring points of the electric power steel structure and the time domain characteristics of vibration signals, generates a dynamic sampling strategy, and carries out the acquisition operation through distributed sensing nodes; and the data transmission scheduling module encapsulates data according to a Predict Steel Core pre-research platform protocol, and performs directional transmission by adopting a time division multiplexing mechanism. The physical information prediction module imports an explicit time-domain physical information dynamic response prediction model and generates state prediction data in combination with the structure parameters; and the threshold early-warning analysis module loads an online incremental learning dynamic threshold early-warning algorithm to carry out real-time comparison. The platform interaction storage module stores data in a classified mode and provides a calling interface, the control coordination module dynamically adjusts operation parameters and data circulation time sequences of all the modules, efficient operation of the whole link is guaranteed, and the processing efficiency and accuracy of the safety production monitoring data of the electric power steel structure are improved.

The embodiment of the invention provides a CXL host controller, a data transmission method and a computer. The CXL host controller comprises a CXL host bridging module and a CXL multi-port controller, the CXL multi-port controller is connected with a physical link of the CXL equipment and is shared by a plurality of root ports managed by the CXL multi-port controller, and each root port is used for being connected with the corresponding CXL equipment; the plurality of root ports are activated by turns according to a time division multiplexing mechanism, and data transmission is carried out by using a physical link; the CXL host bridging module is used for receiving a processor message in a sending direction, converting the processor message into a CXL message and transmitting the CXL message to the CXL multi-port controller; and the CXL multi-port controller receives the CXL message of the CXL host bridging module in the sending direction, indicates the activated target root port based on the current clock period time division multiplexing signal, transmits a data packet corresponding to the CXL message to the target root port, and transmits the data packet to the CXL equipment through the target root port. According to the CXL host controller, multi-port expansion is realized, and higher compatibility and flexibility are provided for expansion of a CXL network and memory equipment.

The invention relates to the technical field of communication, and discloses a dual-mode communication unit relaying and signal amplifying device, which comprises a signal receiving module comprising an HRF wireless receiving channel and an HPLC power line coupling channel which are independently configured, the working frequency band of the HRF wireless receiving channel is 470-510MHz, the receiving sensitivity is not lower than-120dBm, and the working frequency band of the HPLC power line coupling channel is 470-510MHz; the HPLC coupling channel supports a frequency band of 0.7-12 MHz and has an impedance matching range of 20-200 omega, the two channels alternately scan input signals in a time division multiplexing mode, and the signal processing module is integrated with a digital signal processor and field programmable gate array cooperative processing architecture and is internally provided with a signal type identification circuit. According to the device for relaying and amplifying the signals of the dual-mode communication unit, the HRF signals and the HPLC signals are automatically distinguished through fast Fourier transform spectrum analysis, an HRF wireless receiving channel and an HPLC power line coupling channel are integrated, a repeater is installed in an area where HRF signal transmission is not good, the repeater can process the HRF signals and the HPLC signals at the same time, and the signal transmission efficiency is improved. And real-time receiving and efficient transmission of dual-mode signals are realized.

The invention discloses a hybrid multiple access method which comprises the following steps: constructing an unmanned aerial vehicle cluster networking system which comprises an unmanned aerial vehicle cluster network; an unmanned aerial vehicle sending node in an unmanned aerial vehicle cluster network divides channel resource contention and a data packet receiving and transmitting process according to a unified clock, and channel time domain resources are divided into a control channel time interval (CCHI) stage and a service channel time interval (SCHI) stage through time division multiplexing; wherein in the CCHI stage, service channel resource negotiation is performed according to a preset MAC protocol frame structure, time-frequency multiplexing access is performed on a shared service channel, and preliminary hybrid multiple access is completed; the SCHI stage is used for sending a data packet; the unmanned aerial vehicle sending node increases the length of an avoidance window of the unmanned aerial vehicle sending node in the next round according to a preset backoff process in the service channel access process on the premise that a to-be-sent data packet does not suddenly change if the unmanned aerial vehicle sending node encounters the collision conflict of the data packet on the premise that the to-be-sent data packet does not suddenly change; and if the sending is smooth, reducing the length of the receding window.

The invention provides an LED instrument navigation information synchronization and display method and system based on Bluetooth interconnection and a medium, and belongs to the technical field of intelligent vehicle-mounted electronics. The method comprises the following steps: generating a structured navigation data set through a navigation application, establishing multi-channel connection based on a Bluetooth 5.0 protocol, and transmitting data by adopting a time division multiplexing mechanism; after the vehicle-mounted terminal receives the data, integrity verification is carried out, a vector graph is restored according to a geographic information frame, and display content is dynamically screened in combination with vehicle real-time state parameters; and fusing the navigation information and the road feature layer by using a hardware acceleration rendering engine to generate a signal for driving the LED array display device. According to the invention, through the technologies of dynamic traffic data access, adaptive frequency modulation, priority data scheduling and the like, efficient synchronization and accurate display of navigation information are realized, and the real-time performance, the reliability and the user experience of the vehicle-mounted navigation system are improved.

The invention discloses a laser gas detection method and system for leakage inspection of a hydrogen-doped natural gas pipeline. Comprising a master control MCU, a signal generation module, a first laser driving temperature control module, a second laser driving temperature control module, a first semiconductor laser, a second semiconductor laser, a wavelength division multiplexer, a standard gas cell, a multi-reflection gas cell, a first photoelectric detection amplifier, a second photoelectric detection amplifier and a digital gas pressure intensity temperature sensor, the device comprises an orthogonal phase-locked amplification demodulation module, an OLED display screen, a vacuum pump, a drying tube, a handheld sampling tube and a porous gas diffusion probe. A laser absorption spectrum technology of time division multiplexing and wavelength modulation is adopted, and a specific implementation mode is that a semiconductor laser with narrow linewidth and adjustable wavelength is utilized, and non-interference accurate detection of methane and hydrogen in leakage inspection of the hydrogen-doped natural gas pipeline is realized through a high-precision time division multiplexing wavelength modulation spectrum absorption detection technology.