62 results about "Double probe" patented technology

The invention relates to the technical field of integrated circuit testing, in particular to a distance-adjustable probe connector device which comprises an impedance detection unit which comprises a connector fixing part, a connector rotating part, a single connection port, a signal probe and a grounding probe. The impedance data unit is used for determining a characteristic impedance value of the tested microstrip line based on data acquired by the signal probe and the grounding probe; the pressure detection unit is used for determining the contact pressure according to the telescopic displacement of the signal probe and the grounding probe; the control unit determines the allowable range of the contact pressure of the probes based on the line width of the microstrip line to be tested and the distance between the probes, and adjusts the angle between the grounding probe and the surface of the PCB based on the contact pressure difference between the signal probe and the grounding probe and the line width of the microstrip line. And adjusting the contact pressure of the signal probe to obtain the effective characteristic impedance value of the tested microstrip line. According to the invention, the angle and pressure of the grounding probe are intelligently adjusted, and the problem of impedance measurement drift caused by pressure imbalance of double probes is eliminated.

The invention relates to an excess feed detection system, an intelligent porridge machine and an intelligent feeding system and method.The excess feed detection system comprises a probe module and an ultrasonic module which are arranged in the intelligent porridge machine; the probe module comprises two groups of probes, and the two groups of probes are respectively connected with a body controller in the intelligent porridge machine through wires; when the two groups of probes are in contact with porridge in the bowl, a detection loop formed by the body controller and the two groups of probes is conducted; the ultrasonic module comprises two groups of ultrasonic sensors, and the two groups of ultrasonic sensors are symmetrically arranged on the left side and the right side of the intelligent porridge machine. The excess feed detection system solves the problem of failure of dry feed detection of traditional double probes, overcomes the defect that single ultrasonic detection is easy to pollute and block, not only improves the detection precision, but also is beneficial to ensuring healthy growth of pigs.

The present invention relates to a dual-probe detection reagent and a preparation method for detecting Salmonella typhimurium, and belongs to the field of food safety technology. The dual-probe detection reagent is composed of a magnetic separation probe reagent solution and a fluorescent nanozyme probe reagent solution, which are packaged separately; the magnetic separation probe reagent solution is used to specifically bind to Salmonella typhimurium and separate and enrich the test sample; the red fluorescent nanozyme probe reagent solution is used to specifically bind to the Salmonella typhimurium after separation and enrichment, and generate a Salmonella typhimurium concentration-dependent colorimetric signal and a fluorescent signal. The dual-probe detection reagent of the present invention has a short detection time and high detection sensitivity for the detection of Salmonella typhimurium, and has good specificity for common model strains. The present invention has a high specific surface area and excellent peroxidase-like activity, which enhances the high-sensitivity capture efficiency; the dual-modal signals of the present invention verify each other, play an internal proofreading role, and the detection results are accurate.

The invention discloses a double-detector linkage automatic fire extinguishing control method and system for an outdoor charging place, and belongs to the technical field of fire safety. The system comprises a water source supply unit, a detection alarm unit, a control execution unit and a fire extinguishing spraying unit. A dual detection mechanism of the temperature sensing detector and the flame detector is adopted, only when the two detectors give an alarm at the same time, the input and output module judges that a fire behavior is real, and signals are synchronously distributed to the automatic control switch, the fire control room and the charging control cabinet. The system provides an automatic, remote and manual three-start mode to ensure the reliability; the charging control cabinet automatically cuts off a power supply to prevent electric shock after receiving the signal; the anti-freezing design that an underground cement pool is combined with an overflow valve emptying pipeline is adopted, and normal operation can be achieved in the environment of minus 35 DEG C. According to the invention, the risk of false alarm of a single detector is thoroughly eliminated, the response time does not exceed 30 seconds, and the technical problems of low fire detection accuracy, poor winter adaptability and lack of power linkage protection in an outdoor charging place are effectively solved.

The invention relates to the technical field of semiconductor probe performance testing, in particular to a probe performance testing method, which comprises the following steps of: calculating resistance consistency and a signal transmission fidelity ratio of a probe interference working condition through a contact simulation test and a signal transmission simulation test, and performing single-probe simulation verification; for double probes formed by qualified single probes, calculating contact pressure interference variables and electromagnetic crosstalk interference variables, and carrying out cooperative interference judgment; extracting historical probe false data, and constructing an interference false risk model and a non-interference false risk model; grouping the double probes according to interference degrees, and substituting the grouped double probes into corresponding models to calculate risk assessment values; determining an adjustment direction and an adjustment scheme for the high-risk group, and calculating the average attenuation rate of the double probes after adjustment; and after the attenuation rate is verified to reach the standard, the probe group is determined as a qualified performance test probe group, so that the accuracy, the stability and the anti-interference capability of semiconductor probe performance detection are effectively improved.

This invention discloses a microRNA-responsive 1,2-dioxane-based chemiluminescent compound, its dual-probe system, kit, synthesis method, and applications. The compound's core is an o-acrylate-substituted phenoxyadamantane-1,2-dioxane, with the phenolic hydroxyl group protected by an azide benzyl group. The two-component probe system constructed based on this compound comprises an azide-modified first probe and a phosphine-modified second probe, each complementary to different segments of the target microRNA. Hybridization brings the two probes closer, triggering a Staudinger reaction to remove the protecting group and activate the chemiluminescent signal. This probe system requires no enzyme amplification or nucleic acid extraction, achieves a detection limit of 1.37 fM, and a signal-to-noise ratio as high as 157-fold. It can be successfully used for real-time imaging of endogenous microRNA-21 in live cells, showing broad application prospects in early tumor screening, auxiliary diagnosis, and prognostic assessment.

The invention discloses a steel rail welding seam ultrasonic flaw detection method and device. The method comprises a TOFD detection method, a single-probe reflection detection method and a double-probe K-type detection method. A plurality of pairs of rail side flaw detection probes and different combinations of zero-degree rail surface probes and inclined rail surface probes are arranged on two sides of the inner and outer side surfaces of a steel rail from bottom to top by taking a welding seam as a center, and a TOFD detection method, a single-probe reflection detection method and a double-probe K-type detection method are adopted, so that all-directional and multi-angle detection of a steel rail welding seam area is realized. By means of the method, longitudinal defects, transverse defects and defects at different depth positions in the welding seam can be effectively detected, the leakage detection risk is greatly reduced, and the comprehensiveness and reliability of steel rail welding seam quality detection are ensured.

The application discloses a Ka-band eight-way power combiner, which comprises a shielding box body, wherein a straight-through input port, an input waveguide cavity, an input coplanar magic T, a secondary waveguide power division module, a waveguide-microstrip double-probe conversion structure, a secondary waveguide power synthesis module, an output waveguide cavity, an output coplanar magic T and a straight-through output port are sequentially arranged in the shielding box body along a signal transmission direction; the secondary waveguide power division module and the secondary waveguide power synthesis module both adopt an E-T junction structure and are integrated with a three-stage waveguide E-plane stepped structure, so as to realize impedance matching from an input end to an output end; the Ka-band eight-way power combiner has high synthesis efficiency, extremely low amplitude imbalance and phase imbalance in the Ka band through multi-stage waveguide impedance matching, optimized double-probe conversion and symmetrical layout design. The combiner has the advantages of compact structure, large power capacity, simple machining and assembly and good stability.

The invention provides a phased array ultrasonic detection device and an automatic scanning system suitable for a circumferential weld of a small-diameter pipe. The automatic scanning system comprises a scanning frame, a path monitoring module, a coupling device, a driving device and a control device, the scanning frame comprises a cross rod and two probe clamping mechanisms arranged on the cross rod; the path monitoring module comprises an industrial camera, and the industrial camera is arranged on the cross rod, can perform angle adjustment and is used for monitoring a scanning path in real time; the coupling device can convey a coupling agent to the probe; the driving device is connected with the scanning frame and can walk; the control device can control walking of the driving device. The detection device comprises the automatic scanning system and a phased array ultrasonic detection instrument. According to the invention, while the requirements of stable coupling and constant-speed scanning are met, the double probes are symmetrically placed on the two sides of the welding seam for simultaneous scanning, and the scanning path is monitored in real time and the scanning track is remotely controlled and corrected by virtue of the industrial camera, so that the scanning precision is ensured.

The invention discloses a high-temperature and high-pressure integrated cable formation tester. The technical problems that an existing cable formation tester is poor in temperature-resistant and pressure-resistant effect, low in integration level, single in function and the like are solved. The cable formation tester comprises an electronic circuit pup joint, a multi-PVT sampling pup joint, a fluid identification pup joint, a pumping pup joint, an upper jam releasing pup joint, a double-probe pup joint, a lower jam releasing pup joint, a 3D probe pup joint and a double-packer pup joint which are sequentially connected from top to bottom. The fluid identification short section is provided with a density probe, a conductivity probe, a viscosity probe, a pressure probe, a temperature probe, a spectral component probe and a spectral fluorescence probe, and the density probe, the conductivity probe, the viscosity probe, the pressure probe, the temperature probe, the spectral component probe and the spectral fluorescence probe are integrally packaged on the fluid identification short section. The cable formation tester can meet the continuous working condition in the high-temperature and high-pressure environment, and is higher in integration level, more comprehensive in function and more reliable in operation.

The application relates to the technical field of biological detection, in particular to a method for in-situ quantitative detection of specific glycosylation of target protein based on double probes. The method provided by the application comprises the following steps: a protein probe and a glycan probe are used to combine with target protein and target glycan respectively, and the spatial proximity relationship after combination triggers hybridization between the probes on the same target protein to form hybrid double strands; the DNA enzyme of the protein probe is used to enzymatically cut the glycan probe on the hybrid double strands under the action of a metal cofactor; and the report peptide released after enzymatic cutting of the glycan probe is subjected to mass spectrometric quantitative analysis, so that the signal of protein-specific glycoform is converted into a mass spectrometric signal.

The invention relates to a double-probe detection kit for detecting staphylococcus aureus in meat products and a preparation method of the double-probe detection kit, and belongs to the technical field of food safety. The double-probe detection kit is composed of a magnetic capture probe reagent and a double-signal nano-enzyme probe reagent which are independently packaged and have the same volume; the magnetic capture probe reagent is a vancomycin modified reticular magnetic bead and is used for specifically binding staphylococcus aureus in a meat product detection sample and carrying out separation and enrichment treatment; the double-signal nano-enzyme probe reagent is a blue fluorescent carbon dot modified by a nucleic acid aptamer and is used for specifically combining the staphylococcus aureus subjected to separation and enrichment treatment and generating a staphylococcus aureus concentration dependent colorimetric signal and a fluorescent signal. According to the invention, mutual verification is carried out between dual-mode signals, so that the accuracy of a detection result is improved; according to the method, the detection time is within 1.5 h, the detection time is short, the detection sensitivity is high, and the method has good specificity for common type strains.

The application discloses a kind of thermal desorption treatment contaminated soil thermal conductivity test system and test method, test system includes test cavity, heating furnace, gas pressure control system and soil sample thermal conductivity test system, gas pressure control system includes gas pressure sensor, gas pressure control valve, nitrogen source, tail gas processor and vacuum pump, soil sample thermal conductivity test system includes double probe, wire, direct current power supply, multichannel temperature recorder and thermal conductivity calculation system, the double probe insertion to be measured soil sample and place in test cavity, the application can operate under high temperature environment, simultaneously, two different test methods are used to calculate two thermal conductivities for the same to-be-tested soil sample respectively, and the mean value is obtained by comparison and verification, effectively save the time of parallel test under high temperature environment, reduce the experimental error of calculating thermal conductivity.

The invention provides an automatic test method, device and equipment and a storage medium, the automatic test method is applied to the automatic test equipment, the automatic test equipment comprises a driving mechanism, a detection mechanism and a double-probe mechanism, and the automatic test method comprises the following steps: controlling the driving mechanism to drive probes in the double-probe mechanism to move to a detection point position of a to-be-detected material; when the probe is in contact with the detection point, collecting measurement data of the detection point through a detection mechanism; judging whether the to-be-detected material is an unqualified material or not according to the measurement data and preset standard information; and when the to-be-detected material is an unqualified material, obtaining abnormal data in the measurement data. According to the invention, the automatic measurement of the measurement data of the to-be-detected material can be realized, the measurement precision is improved, the labor cost is saved, the unqualified material can be detected automatically, rapidly and accurately, the yield is improved, the abnormal data of the unqualified material can be obtained automatically, and the detection efficiency is improved. The automatic analysis of the disqualification reason of the to-be-detected material is realized.

The invention belongs to the field of chemical detection, and relates to a preparation method and application of a CdSe / ZnS quantum dot labeled double-probe fluorescence immunochromatography test strip. The test strip comprises a bottom plate, a nitrocellulose membrane, a sample pad, a conjugate pad and a water absorption pad, the nitrocellulose membrane is located above the bottom plate, the sample pad and the conjugate pad are sequentially arranged on the bottom plate on the left side of the nitrocellulose membrane, and the water absorption pad is arranged on the bottom plate on the right side of the nitrocellulose membrane; quantum dots with two wavelengths are distributed on the conjugate pad and are respectively marked with two probes of mouse antibodies of two pesticides, and a thiamethoxam antigen, a clothianidin antigen and a goat anti-mouse secondary antibody strip are further distributed on the nitrocellulose membrane. The invention further provides a visual and rapid detection test strip suitable for quantitatively detecting the residual quantity of thiamethoxam and clothianidin in spinach, the cross reaction is lower than 10% or below of the rapid detection requirement, and the visual and rapid detection test strip has market application and popularization value.

The utility model belongs to the technical field of monitoring system maintenance, and relates to an auxiliary device based on monitoring system maintenance, which comprises a mounting plate, a universal meter body and exploring tubes, the two exploring tubes are respectively positioned on the outer side of the mounting plate, the mounting plate is U-shaped, the universal meter body is arranged in the mounting plate, the bottom of the mounting plate is provided with a position fixing mechanism, and the position fixing mechanism is fixed on the universal meter body. The universal meter body is symmetrically provided with the connecting lines, one end of each connecting line is connected with the probe tube, and the universal meter body can be fixed on the wrist or other places through the mutual cooperation of the mounting plate, the supporting plate, the cylindrical block, the first spring, the positioning plate, the magic tape bandage and the like. When the universal meter is used, the probe tube can be clamped on an object needing to be measured, in addition, the universal meter body can be separated from the mounting plate when needed, the universal meter is flexible to use, and the problems of unstable operation and data deviation easily caused by holding the universal meter with a single hand and controlling the double probes are effectively solved.

The application discloses a nucleic acid absolute quantification method based on nucleic acid constant temperature amplification, which comprises the following specific steps: step one, sample pretreatment, blood samples and saliva samples are pretreated respectively; step two, reaction system configuration and assembly; step three, digital micro-reaction unit preparation and amplification; and step four, multiple signal analysis and absolute quantification. In the application, multiple primer design and a double-probe system are adopted, so that the mutation detection rate is improved, and the detection limit can be reduced to 0.1% variation through Cas12a-sgRNA auxiliary verification. The double-emulsification technology of the micro-fluidic chip is adopted, so that the droplet diameter variation coefficient is controlled within 5%, and the clogged micropore rate is reduced by real-time analysis of the micropore array image through the ImageJ software, automatic marking and exclusion of abnormal units.

1. The name of the design product: ultrasonic ranging sensor (double probe core). 2. The use of the design product: for detecting the distance between the object and the surface of the sensor. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention discloses a 5GC industrial private network switching delay detection method, which comprises the following steps of: setting timestamps of a control surface and a data surface more finely by using a double-probe measurement mechanism through a first probe and a second probe which are respectively arranged at an N2 interface and an N3 interface, and calibrating clock skew between the double probes in cooperation with a 5G synchronous clock, so that the accuracy of the switching delay of a 5GC industrial private network is improved. Multi-stage time delay is calculated by obtaining wireless transmission time delay, 5GC forwarding time delay and a difference value of processing starting and ending timestamps of each stage of a protocol stack composed of an IP, a UDP and a GTP-U, so that the network quality of equipment in operation is accurately calculated, the detection accuracy is improved, and by compiling keepalived supporting bidirectional forwarding detection and cooperating with main and standby node switching cooperation of a VRRP, the network quality of equipment in operation is improved. Millimeter-level fault detection is realized, the fault detection efficiency is improved, the network fault detection period is shortened, the response speed is improved, millisecond-level switching is realized, and the switching efficiency is improved.

The invention discloses equipment for testing the mechanical life of a contactor, and particularly relates to the technical field of direct current contactors, the equipment comprises a contactor testing machine and the contactor, the surface of a tool plate is provided with an installation mechanism for installing or replacing a test probe, and through the installation mechanism and an oil pressure buffer, the test probe is installed or replaced. The air cylinder is started to control the tool plate to move downwards, one end of the probe is made to make contact with the contactor, the position arrangement of the probe is related to whether all installation point positions of the contactor to be detected are qualified or not, synchronous detection of multiple stations can be achieved according to the multiple sets of grooves, in the falling detection process, one end of the probe makes contact with the contactor, and the detection accuracy is improved. A sensor or an inductor on the probe is utilized, an alarm can be given when an object to be detected is detected to be unqualified, the error detection probability is reduced by using the double probes, the influence caused by vibration during testing is reduced by using the oil pressure buffer, and meanwhile, the probe is adopted for detection, so that a wiring harness connection mode is not needed, and the remodeling time is further shortened.

To provide a method for enrichment of at least one target nucleic acid in a library of nucleic acids.SOLUTION: A first oligonucleotide is hybridized to a target nucleic acid in library of nucleic acids having first and second adapters. The hybridized first oligonucleotide is extended with a first polymerase, thereby producing a first primer extension complex including the target nucleic acid and the extended first oligonucleotide. The first primer extension complex is captured, enriched relative to the library of nucleic acids, and a second oligonucleotide is hybridized to the target nucleic acid. The hybridized second oligonucleotide is extended with a second polymerase, thereby producing a second primer extension complex including the target nucleic acid and the extended second oligonucleotide, and further liberating the extended first oligonucleotide from the first primer extension complex.SELECTED DRAWING: Figure 1

The invention discloses a multi-probe imaging mechanism of full-ring SPECT-CT equipment. The multi-probe imaging mechanism comprises an annular mounting disc, a plurality of probes and a plurality of probe driving assemblies, the number of the probes and the number of the probe driving assemblies are both 3-9, and the probes and the probe driving assemblies are in one-to-one correspondence. The plurality of probes are uniformly distributed in the circumferential direction of the annular mounting disc, each probe is movably arranged on the annular mounting disc in the radial direction of the annular mounting disc through the corresponding probe driving assembly, and the probe driving assemblies are used for driving the probes to move. The problems that most of existing SPECT-CT devices are single-group or double-group probes and cannot fully cover organs of the whole body of the human body, the probes need to be frequently adjusted for one-by-one detection when different organs are detected, and the whole body detection efficiency is low are solved.

The invention discloses a probe for researching a working mechanism of NAD (Nicotinamide Adenine Dinucleotide) or a metabolite thereof and application of the probe. The probe is a double-probe combination and comprises a first probe and a second probe, the first probe is azide-modified nicotinamide adenine dinucleotide or azide-modified nicotinamide adenine dinucleotide metabolite, namely, an azide group is introduced to the adenine 8 site of the nicotinamide adenine dinucleotide or the nicotinamide adenine dinucleotide metabolite; enabling the azide group and adenine of nicotinamide adenine dinucleotide or nicotinamide adenine dinucleotide metabolite to form a photo-crosslinking reaction group; and the second probe is an EBT probe with biotin. The molecular structure of the first probe is closer to that of the NAD or the metabolite of the NAD, the interaction protein captured by the first probe can better reflect the real binding condition of the NAD or the metabolite of the NAD and the interaction proteome, and therefore the working mechanism of the NAD or the metabolite of the NAD can be reflected more accurately and truly.

The invention relates to a double-probe detection kit for detecting escherichia coli O157: H7 and a preparation method of the double-probe detection kit, and belongs to the technical field of food safety. The double-probe detection kit consists of a magnetic separation probe reagent and a copper-manganese double-metal nano-enzyme probe reagent which are independently packaged. The magnetic separation probe reagent is a concanavalin agglutinin A modified magnetic bead, and is used for specifically binding escherichia coli O157: H7 in a meat product detection sample and carrying out separation and enrichment treatment; the bimetallic nano-enzyme probe reagent is copper-manganese bimetallic nano-enzyme modified by a nucleic acid aptamer, and is used for specifically combining with the escherichia coli O157: H7 subjected to separation and enrichment treatment and generating an escherichia coli O157: H7 concentration dependent colorimetric signal and a fluorescence signal. According to the invention, mutual verification is carried out between dual-mode signals, so that the accuracy of a detection result is improved; the detection time is within 1.5 h, and the method has good specificity for common type strains. The invention provides a design thought for the development of detection sensors for escherichia coli O157: H7 and other meat-derived pathogenic bacteria.

The invention relates to the technical field of robots and nondestructive testing, in particular to a distance-adjustable far-field eddy current probe carried by a robot and a calibration method, the relative position relation of double probes can be accurately determined under a robot flange coordinate system without depending on complex tools, and a unified tool coordinate system located between the two probes is established. Point cloud coordinate information on the surface of the carbon fiber hydrogen storage bottle is obtained by introducing a line laser camera, accurate recognition of the spatial pose of the carbon fiber hydrogen storage bottle is achieved, dependence on three-dimensional simulation modeling is avoided, then planning of a far-field eddy current detection path and efficient acquisition of eddy current signals are supported, the automation level and the result reliability of the detection process are effectively improved, and the detection efficiency is improved. The problems that the end of a far-field eddy current probe device is mostly of a plane structure, a sharp point which can be directly used as a tool center point (TCP) is lacked, and a common four-point calibration method is difficult to apply are solved.

The invention discloses a stray capacitance change voltage measurement method and electronic equipment. According to the stray capacitance self-adaptive voltage measurement method provided by the invention, the design of double probes which are asymmetric in structure is adopted, and a set of complete closed-loop processing flow is constructed, so that remarkable technical progress is realized. Specifically, firstly, according to the method, ground stray capacitance change caused by environmental factors can be sensitively sensed in real time through the difference (discriminant quantity) of double-probe response voltage, and the inherent defect that a traditional single-probe method cannot diagnose system parameter drift by itself is overcome; and secondly, by introducing an intelligent transformation ratio adjustment algorithm, the method can automatically and accurately carry out iterative correction on the current transformation ratio, and effectively compensates a measurement error caused by stray capacitance change, thereby ensuring high precision and stability of long-term measurement without any manual intervention.

The present disclosure provides an automatic test method, an automatic test device, and a storage medium. The automatic test method is applied to the automatic test device. The automatic test device includes a driving mechanism, a detection mechanism and a dual-probe mechanism. The automatic test method includes controlling the driving mechanism to drive a probe in the dual-probe mechanism to move to a position of a detection point of a material. When the probe contacts the detection point, the detection mechanism collects measurement data of the detection point. Determining whether the material is an unqualified material according to the measurement data and preset standard information. When the material is the unqualified material, abnormal data is obtained from the measurement data. The present disclosure reduces human errors, improves data accuracy and reliability, and significantly improves work efficiency.

A new two-probe slide screw load-pull tuner of which the probes share the same slabline section; they are inserted diametrically at fixed depth facing on opposite sides of the center conductor. The tuner does not have cumbersome adjustable vertical axes controlling the penetration of the probes and its low profile is optimized for on-wafer operations. The carriages holding the probes are moved along the slabline using electric stepper motors or linear actuators. The calibration uses mutual de-embedding of initialized probes and is 20 or more times faster than the full probe permutations calibration.

The application discloses a kind of double-probe nanometer measuring instruments, including measurer main body;The front end of the measurer main body is equipped with first probe, second probe;The first probe is used to detect the signal of the measured object under external environmental interference;The second probe is used to detect the interference signal of the nearby environment of the measured object;The beneficial effects of the application are that: the design adopts double probe, one probe detects the signal of the measured object under external environmental interference, another detects the interference signal of the nearby environment of the measured object, by calculating two signal values, finally two values are subtracted, the value obtained is the value of the measured object;Let nanometer measurement system save traditional closed bad mirror equipment, and can measure large measured object.

This invention discloses a 5GC industrial private network handover latency detection method. It utilizes a dual-probe measurement mechanism by deploying a first and second probe on the N2 and N3 interfaces respectively, allowing for more precise timestamp settings on the control plane and data plane. The method also incorporates a 5G synchronization clock to calibrate the clock deviation between the two probes. Furthermore, it calculates multi-level latency by acquiring the differences in start and end timestamps of wireless transmission latency, 5GC forwarding latency, and the processing start and end timestamps of each stage of the protocol stack composed of IP, UDP, and GTP-U. This allows for accurate calculation of the network quality of the operating device, improving detection accuracy. By compiling keepalived to support bidirectional forwarding detection and coordinating with VRRP primary / backup node handover, it achieves millimeter-level fault detection, improving fault detection efficiency, shortening the network fault detection cycle, increasing response speed, and enabling millisecond-level handover, thus enhancing handover efficiency.