1572results about "Electric connection testing" patented technology

The invention relates to the technical field of electronic equipment detection, and discloses an FPC connector quality detection method and system based on multi-modal fusion, and the method comprises the steps: obtaining an original multi-modal data set containing electrical stress, thermal stress and mechanical stress, and carrying out the filtering and time sequence alignment preprocessing, and obtaining a standardized multi-physical field sequence; constructing a three-dimensional space field intensity distribution diagram according to the sequence, and identifying field intensity anomalies by adopting density clustering so as to accurately position potential defects; learning a time sequence evolution mode based on the multi-moment observation value of the defect position to predict the future diffusion trend of the defect; and integrating the diffusion trend, the real-time field intensity and the environment variable to carry out comprehensive modeling and evaluation, and generating a dynamically updated and final quality detection report. According to the method, root cause diagnosis of connector defects, accurate three-dimensional space fault positioning and accurate prediction of future evolution trends can be realized, and the detection precision and predictability are remarkably improved.

The invention relates to the technical field of intelligent power distribution system state monitoring, in particular to a cable connection state online monitoring method for a low-voltage cable branch box, which comprises the following steps of: applying a disturbance excitation signal to a connection node of the cable branch box, and acquiring transient voltage, current and phase response parameters of the node in different excitation periods; establishing a mapping relation between the node electrical characteristics and the connection state; performing dynamic reference calibration on the acquired signals based on a multi-node space-time coupling matrix to form an adaptive judgment reference of electrical coupling between nodes; a connection degradation sensitive index is extracted through feature sequence differential calculation, a connection state quantitative evaluation result is generated, and real-time updating and anomaly recognition are carried out according to the state change trend; according to the method, the problems of misjudgment and delay caused by a monitoring mode depending on indirect parameters such as temperature and current are solved, high environmental adaptability and degradation identification precision are achieved, and the operation safety and monitoring reliability of the low-voltage power distribution system are greatly improved.

The invention discloses an electric connector fault prediction method, and the method comprises the steps: synchronously obtaining multiple types of time series data of a contact area of a target electric connector in a preset time window based on a preset data collection device, and the time series data comprise temperature spatial and temporal distribution time series data, contact resistance transient time series data and a surface image sequence; performing feature analysis on the multi-source time sequence data by using a preset time sequence coupling sign extraction mechanism to obtain a multi-source phase change feature vector of the target electric connector in the current time window; inputting the multi-source phase change feature vector into a pre-trained electric connector health state prediction model, and outputting a prediction result of the health state of the target connector at the current moment, including a health state index; and performing differential early warning based on the predicted health state index of the target connector. Therefore, early and quantitative accurate prediction of the state of the electric connector is realized.

The invention relates to a cable joint resonance real-time diagnosis method and device and a medium, and belongs to the technical field of power equipment state monitoring, and the method comprises the following steps: obtaining a high-frequency current signal collected by a high-frequency current sensor and an ultrasonic vibration signal collected by an ultrasonic sensor array; performing signal synchronization on the high-frequency current signal and the ultrasonic vibration signal, and extracting a high-frequency current feature and an ultrasonic array feature; calculating a dominant frequency synchronization index, a normalized phase stability index and a nonlinear coupling index based on the high-frequency current characteristics and the ultrasonic array characteristics, and performing weighted summation to determine a fusion confidence coefficient function; and judging whether resonance exists or not based on the fusion confidence coefficient function, and if so, carrying out resonance source positioning. Compared with the prior art, the method has the advantages of high precision, low false alarm and high adaptability, and is suitable for key power system scenes such as new energy grid connection, urban smart power grids and wind power.

The invention provides a cable branch box operation state evaluation method and system, and relates to the technical field of data processing, and the method comprises the steps: 1, collecting the electrical parameters and physical state parameters of a cable terminal, a connecting line lug and an insulating sleeve in a cable branch box, and carrying out the preprocessing of the electrical parameters and the physical state parameters, obtaining a standardized state data sequence; and step 2, classifying the standardized state data sequence according to three parts, namely a cable terminal, a connecting wire lug and an insulating sleeve to form three independent state data subsets, and establishing an analysis framework containing M rows and N columns of analysis units for each state data subset. According to the invention, the operation states of the cable terminal head, the connecting wire lug and the insulating sleeve core component in the cable branch box can be accurately evaluated, and the fault risk can be graded and early warned, so that the differentiated operation and maintenance instruction is generated, and the operation and maintenance efficiency and the equipment operation reliability are effectively improved.

The utility model provides a high-voltage interlocking detection system and a vehicle. The high-voltage interlocking detection system comprises a detection circuit, a plurality of signal processing modules and a control module. The detection circuit comprises a plurality of detection branches connected in series, the plurality of detection branches are correspondingly connected with the plurality of low-voltage detection connectors, and the detection branches output detection signals based on the connection states of the low-voltage detection connectors; the plurality of signal processing modules receive detection signals from the plurality of detection branches; and the control module determines the on-off state of the high-voltage interlocking loop and the connection state of the plurality of low-voltage detection connectors based on the detection signals processed by the plurality of signal processing modules. In the system, a plurality of detection branches are connected with a control module through different signal processing modules, wire harnesses are separated from one another, and a plurality of signal processing modules process a plurality of detection signals and then uniformly send the signals to the control module through a common node, so that the arrangement of the wire harnesses is reduced while reliable transmission of the signals is ensured, and the cost is reduced. And the whole circuit of the system is simplified.

Disclosed are a fracture detection method for a connection component of an energy storage system, and an energy storage system. The method is applied to an energy storage edge and includes: obtaining operating state parameters of the at least one secondary battery sampled and uploaded by the sampling part; determining a parameter discrete characteristic value of the operating state parameters; performing a fracture detection for the connection component according to a magnitude relationship between the parameter discrete characteristic value and a preset discrete characteristic value threshold to obtain an edge-side fracture detection result; and sending the operating state parameters and the edge-side fracture detection result to an energy storage cloud for the energy storage cloud to generate a fracture detection result of the connection component according to a cloud-side fracture detection result and the edge-side fracture detection result.

The invention discloses a sensor clamping mechanism and a mutual inductor crimping fault detection device and method, and relates to the technical field of mutual inductor detection. In a project verification process of an existing voltage-withstanding table and an error table, abnormal conditions such as inclination of a mutual inductor body, inaccurate tray positioning, abnormity of a magnetic switch, air leakage of an air cylinder air pipe and the like occur, so that a terminal stud of a test table cannot be in contact with a secondary side terminal of a mutual inductor to be tested; and detection interruption or false detection of a corresponding mutual inductor exists, so that the verification efficiency is reduced. According to the frame body, the measuring rod, the elastic piece and the sensor, the sensor can detect the relative displacement between the measuring rod and the frame body, if the relative displacement is within a normal range, the terminal stud is in successful crimping contact, and if the relative displacement exceeds the normal displacement range, the terminal stud has a crimping fault. Therefore, the system judges that the wiring terminal of the to-be-detected mutual inductor is failed in crimping with the wiring end, automatically identifies the crimping fault of the wiring end, and improves the operation efficiency of an assembly line.

The invention provides a residual life prediction method and device of a chip test connector and a storage medium, and the method comprises the steps: firstly collecting the current data of a loop where the chip test connector is located in a first time period, and determining the current rise rate, the current sag feature and the current noise feature based on the current data; and inputting the current rise rate, the current sag feature and the current noise feature into a pre-trained prediction model to obtain the residual life of the chip test connector output by the prediction model. According to the application, multi-dimensional features such as the current rising rate, the current sag feature and the current noise feature are extracted according to the dynamic current, the features influencing the service life of the chip test connector can be monitored in real time, and the influence of contact fatigue, arc risk and connection surface dirt in the working process of the chip test connector is comprehensively considered; the prediction accuracy is improved, and various problems caused by performance reduction of the chip test connector are reduced.

The invention relates to the technical field of electronic connector performance monitoring, in particular to a connector performance detection method, and aims to solve the problem that a method for realizing performance early warning through dynamic correlation analysis of vibration signals and contact resistance in the prior art is not suitable for an L-shaped pin connector without a sheath. According to the method, micro-strain signals and contact resistance signals are synchronously collected, analysis time periods are divided in combination with plugging events, the plastic deformation accumulation degree and signal response delay characteristics are quantitatively evaluated, performance degradation coefficients are generated through fusion, and trend analysis is carried out; the problem that the relevance between the mechanical deformation and the electrical performance cannot be quantitatively evaluated in the prior art is effectively solved, and the method has the advantages of realizing early warning, improving the monitoring accuracy and reducing the maintenance cost.

The utility model discloses a device for testing the plugging durability of a charging gun and a charging seat of an electric automobile, and relates to the technical field of detection and application. The device comprises a mounting frame, wherein a fixing assembly, a moving assembly, an adjusting assembly, a clamping assembly and a moving assembly are respectively arranged on the mounting frame; the height of the adjusting assembly is adjusted, the clamping assembly fixedly installed on one side of the adjusting assembly can be driven to adjust the height, one end of the charging gun is driven to correspond to one end of the charging base, and the adjusting assembly fixedly installed at the moving end of the moving assembly is driven to reciprocate by starting the moving assembly. The clamping assembly fixedly installed on one side can be driven to move so that the clamping assembly can drive the charging gun and the charging base to be plugged and unplugged in a reciprocating mode, then the effectiveness of plugging and unplugging each time is guaranteed, deviation of a test result is avoided, and the accuracy of the plugging and unplugging durability between the charging base and the charging gun at specific times is improved.

The invention relates to an anti-loose monitoring method for electric power fitting wire clamps, which comprises the following steps of: injecting a high-frequency probe signal into a preset conductor of a power transmission line serving as a sensing medium from a detection end, and receiving a reflected signal sequence generated by a plurality of electric power fitting wire clamps along the line due to discontinuous impedance; the round-trip time of each reflected signal in the sequence is analyzed to accurately position each wire clamp, and the reflection characteristics of the wire clamps are extracted to represent the real-time connection state. And comparing the real-time reflection characteristic with a pre-stored baseline reflection characteristic of the wire clamp in a fastening state, and determining that the wire clamp at the corresponding position is loosened when the difference between the real-time reflection characteristic and the pre-stored baseline reflection characteristic exceeds a preset threshold value. According to the invention, remote, passive and full-coverage monitoring of the fastening state of a plurality of electric power fitting wire clamps on a power transmission line can be realized, and the technical problems of low manual inspection efficiency and strong subjectivity, and high cost, difficult power supply, complex maintenance and the like of an online monitoring device in the prior art are solved.

The utility model provides a high-voltage interlocking detection system and a vehicle. The high-voltage interlocking detection system comprises a detection circuit and a microcontroller. The detection circuit comprises a plurality of detection branches connected in series, the plurality of detection branches are correspondingly connected with the plurality of low-voltage detection connectors, and the detection branches output corresponding detection signals based on the connection states of the low-voltage detection connectors; the microcontroller is connected with the plurality of detection branches to receive detection signals from the plurality of detection branches, and the microcontroller determines the on-off state of the high-voltage interlocking loop and the connection state of the plurality of low-voltage detection connectors based on the plurality of detection signals. According to the system, the detection signals of different detection branches are received and processed through the same microcontroller, the response speed is high, the multiple detection signals are received through the same microcontroller, the synchronism of receiving the detection signals is high, the detection real-time performance and the detection accuracy of the microcontroller are guaranteed, additional sub-control units do not need to be arranged, and the cost is low. The manufacturing cost is saved, and the system structure is simplified.

The present disclosure provides for an automated wire harness diagnosis system and process for measuring the electrical characteristics of a wire harness in order to provide an estimate of the useful lifespan of the wire harness. Embodiments described herein may be deployed in a remanufacturing environment or in a manufacturing environment to provide statistically based estimates of the remaining useable lifetime of the wire harness, thus allowing to reduce costs and waste when producing wire harnesses within a circular economy environment.

The utility model discloses a wire harness assembly detection bench, which belongs to the field of wire harness assembly detection, and is characterized in that the upper end of a workbench is provided with a plurality of slide rail assemblies, a connecting seat is installed on a slide seat of each slide rail assembly, the upper end of each connecting seat is provided with a clamping seat through a screw rod, a wire harness terminal is clamped on each clamping seat, and a track is installed on the workbench; the track is provided with a movable plug connector detection assembly, and the wiring harness terminal is aligned with the plug connector detection assembly to realize plug connection detection. The sliding rail assembly enables the connecting plug detection assembly to rapidly and stably move on a rail, and the wiring harness terminal detection efficiency is improved through combination with a manipulator and a clamp. High precision and high stability ensure accurate and reliable plugging. The height of the clamping base is adjustable, and personal errors are reduced. The multi-slide rail assembly processes a plurality of wire harness terminals in parallel, so that the flexibility is improved. The telescopic function of the hydraulic cylinder provides an operation space, and the detection module monitors the plugging state in real time, immediately feeds back and stops working in case of abnormality, and guarantees safety.

The utility model belongs to the technical field of connector testing, and discloses a plugging testing mechanism and a testing device. The plugging test mechanism comprises a substrate, an opponent piece module and a carrier plate, the opponent piece module is arranged on the substrate, and the opponent piece module comprises a PCBA board; the electronic product with the elastic piece type connector is placed on the carrier plate, the carrier plate is connected to the substrate in a sliding mode, and the carrier plate can move relative to the substrate so that the PCBA board can be connected with the elastic piece type connector in an inserted mode. According to the utility model, the PCBA board is arranged to replace an FFC connecting line, so that the PCBA board is ensured not to be quickly worn when being rubbed with an elastic sheet of the elastic sheet type connector, the PCBA board can be plugged and unplugged for more than 15000 times after being tested, the test accuracy is effectively ensured, frequent replacement is not needed, and the test efficiency can be improved; by arranging the substrate and the carrier plate which move relatively, the PCBA board and the elastic sheet type connector are driven to perform plugging operation, signal transmission is realized, a signal transmission path is comprehensively detected, and the purpose of testing is achieved.

The invention relates to the field of fault detection, in particular to an electric meter terminal group fault detection method and system based on edge computing, and the method comprises the steps: obtaining a current data sequence of each electric meter terminal connected to the same phase in a preset time period, taking any current data sequence as a target sequence, and obtaining a current data sequence of each electric meter terminal; intercepting a window sequence corresponding to the maximum value of the stability index as a candidate sequence of the target sequence, and traversing to obtain a candidate sequence of each current data sequence; and obtaining a clustering cluster corresponding to each sequence set, taking any clustering cluster as a target cluster, calculating the similarity in a weighted group of each candidate sequence in the target cluster, taking the candidate sequence with the similarity in the weighted group smaller than a preset threshold value as a potential abnormal sequence, and carrying out fault alarm. According to the invention, the accuracy of ammeter terminal group fault detection can be improved.

The invention discloses a cable terminal crimping quality detection method, device and equipment and a storage medium, and relates to the technical field of cable testing, and the method comprises the steps: exciting a cable terminal through a current pin in the crimping process of the cable terminal, collecting the voltage of the cable terminal through a voltage pin, and obtaining a real-time voltage signal; and evaluating the crimping quality of the cable terminal based on the resistance change condition of the real-time resistance value in the crimping process. According to the invention, the detection behavior and the crimping process are carried out synchronously, and the real-time monitoring of the dynamic change of the resistance in the crimping process is realized, so that the method can be applied to the one-by-one full detection of a production line, and the measurement mode of separating current excitation and voltage collection is adopted. A system error caused by lead resistance introduced by a common lead of current excitation and voltage acquisition is avoided, and real-time performance, non-destructive performance and high precision are effectively considered when the crimping quality of the cable terminal is evaluated.

The utility model discloses a power supply tool capable of rapidly identifying the connection condition of a circuit breaker, which comprises a base and at least two conductive plugs arranged on the base at intervals, the conductive plugs comprise a first conductive plug and a second conductive plug which are sequentially distributed along the arrangement direction, the base is provided with a first push switch, and the base is provided with a second push switch. The first push switch is triggered by the circuit breaker in an abutting mode when the conductive plug is connected with the wiring port of the circuit breaker in an inserted mode. According to the utility model, whether connection is established between the conductive plug and the wiring port of the circuit breaker can be rapidly identified.

The invention discloses a cable warning pile and method for monitoring the state of an intermediate joint of a directly-buried power cable, relates to the field of state monitoring of power equipment in power engineering, and aims to solve the problems of single-parameter acquisition, large interference influence, non-objective evaluation and non-visual early warning in the existing monitoring technology. The warning pile is vertically buried at the position 0.3-0.8 m above a connector, temperature, partial discharge, vibration and environment data are synchronously collected through multiple sensors such as an optical fiber temperature sensor and a high-frequency current transformer, after data alignment, abnormal value elimination, filtering and integral preprocessing, the real temperature of the connector is restored through an environment and vibration coupling correction model, and the real temperature of the connector is obtained. And extracting a partial discharge peak factor and an average discharge capacity core characteristic. An index weight is determined based on an entropy weight method to construct a health degree evaluation model, operation states are divided into normal, attention, early warning and fault classes, hierarchical visual warning is realized through a three-color indicating lamp group and a buzzer, and the model is dynamically updated in combination with maintenance data every three months.

The invention relates to the technical field of motor excitation control, in particular to an excitation system limiter performance test system and method, and the system comprises a hardware inspection module which carries out the hardware inspection of an excitation system limiter, and obtains a first inspection result which comprises hardware connection information and hardware state information; the parameter setting module is used for performing parameter setting on the excitation system limiter to obtain a first setting result, and the first setting result comprises signal parameter information and load parameter information; the environment simulation module is used for simulating a test environment to obtain a first simulation result, and the first simulation result comprises simulation signal information and simulation load information; the performance testing module is used for testing the performance of the excitation system limiter according to the first checking result and the first setting result to obtain a first testing result; the result adjusting module is used for adjusting the first test result according to the first simulation result to obtain a second test result; and a report generation module.

The embodiment of the invention discloses a non-contact multi-parameter elbow joint fault diagnosis method and device. Collecting multi-parameter original signals of the area where the elbow-shaped joint is located in the same time reference and the same physical microenvironment; performing denoising, zero offset correction and filtering on the multi-parameter original signal to obtain a pre-processed multi-parameter signal; performing compensation processing on the preprocessed multi-parameter signal by applying a space-time coupling compensation matrix; performing feature extraction on the compensated multi-parameter signals to obtain feature vectors, and calculating response time lag between channels of the parameter signals; calculating a weighted time distance between the typical mode of the current observation stage and each fault stage, and mapping the weighted time distance to a preset fault evolution chain, so as to calculate a posterior probability of the typical mode of each fault stage through the fault evolution chain; and according to a comparison result of the posterior probability and a preset fault threshold value, outputting a fault diagnosis result of the area where the elbow-shaped joint is located and a confidence coefficient corresponding to the fault diagnosis result.

The invention provides a conduction tester for a wire harness connector, and particularly relates to the technical field of electrical testing of connectors, the conduction tester comprises a testing table plate and a tester body mounted on the top surface of the testing table plate, one side of the tester body is provided with an accommodating cabin, and one side of the tester body is provided with a display and a main controller; according to the conduction tester of the wiring harness connector, the limiting sliding block is stably matched with the limiting sliding rail on the cabin wall of the containing cabin, the probe seat can be accurately aligned with the connector in the clamping groove seat through the servo air cylinder, the probability of poor contact caused by manual insertion is greatly reduced, it is guaranteed that the test is smoothly carried out, and meanwhile the testing efficiency is improved. Through the cooperation of the pressure sensing part, the main controller and the force value regulator, the driving force of the linear driving part can be kept in a proper range, and the stable contact state of the probe and the connector is ensured, so that the test result is more reliable, and the test error caused by the contact problem is reduced.

An apparatus for detecting a deterioration of a rapid charging terminal includes one or more processors and a storage medium storing a computer-readable instruction, wherein, when the computer-readable instruction is executed by the one or more processors, the one or more processors are configured to measure an inter-terminal voltage due to a contact resistance between rapid charging terminals respectively provided in an inlet and an outlet, while rapid charging is performed, and determine whether the rapid charging terminal is deteriorated based on the measured inter-terminal voltage, and wherein the voltage is measured using a terminal not used for rapid charging among the terminals provided in the inlet and the outlet.

An electrical wiring device including: a plurality of line terminals comprising a line-side phase terminal and a line-side neutral terminal; a plurality of load terminals comprising a load-side phase terminal and a load-side neutral terminal; a line conductor electrically coupling the line-side phase terminal to the load-side phase terminal; a neutral conductor electrically coupling the line-side neutral terminal to the load-side neutral terminal; and a controller configured to trigger a trip mechanism to electrically decouple the at least one of the plurality of line terminals from at least one of the plurality of load terminals based, at least in part, on comparing a magnitude of the current differential to a threshold, wherein the threshold is a function of the frequency of the current differential.

The invention relates to a method and device for detecting breakage of a connecting assembly of an energy storage system and the energy storage system. The method is applied to energy storage edge ends. The method comprises the steps that operation state parameters of at least one secondary battery connected with a connecting assembly are obtained, parameter discrete characteristic values between the operation state parameters are determined, and the parameter discrete characteristic values represent the discrete degree of the operation state parameters of the secondary batteries; according to the size relation between the parameter discrete characteristic value and a preset discrete characteristic value threshold value, fracture detection is conducted on the connecting assembly, and an edge end fracture detection result is obtained; the operation state parameters and the edge end fracture detection result are sent to the energy storage cloud, so that the energy storage cloud generates a fracture detection result of the connection assembly according to the cloud fracture detection result and the edge end fracture detection result, and the cloud fracture detection result is obtained through prediction according to the operation state parameters. By adopting the method, the detection effect of fracture detection on the connecting assembly of the energy storage system is improved.