2093results about "Electric connection testing" patented technology

The invention discloses a copper bar connection state detection method and system, particularly relates to the technical field of copper bar state detection, and is used for solving the problem of poor early recognition of copper bar connection deterioration. According to the method, resistance and temperature rise conditions at the joint of the copper bars are measured synchronously in the load change process, signal denoising is realized in combination with finite difference filtering, and characteristic evolution conditions at the joint are captured; the method comprises the steps of determining an analysis window based on a real-time load change event, constructing a thermoelectric track point set and dividing a load rising and falling period, forming a continuous dynamic thermoelectric response curve, dividing a temperature rising track and a temperature falling track through a temperature change trend, extracting a resistance drift amount and a hysteresis loop area, and identifying a connection degradation trend and a structure fatigue characteristic. And connection state information generated by thermal stress action and thermal cycle asymmetry is obtained during load change, and a detection strategy is adjusted according to an analysis result, so that early degradation identification and intelligent risk grading of the copper bar connection state are carried out, and the sensitivity and accuracy of copper bar detection are improved.

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 mining mechanical equipment, and particularly discloses a mining mechanical equipment anomaly detection system and method. Current signals, voltage signals and vibration signals in the operation process of mining mechanical equipment are obtained; the method comprises the following steps: extracting an equipment operation current-voltage correlation feature vector and a mining mechanical equipment time frequency correlation feature vector, fusing to obtain a mining mechanical equipment anomaly classification feature vector, and obtaining a classification result through a classifier to indicate whether the mining mechanical equipment is abnormal or not, thereby realizing anomaly detection of the mining mechanical equipment.

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 relates to the technical field of testing, in particular to electric connector joint testing equipment which comprises a testing table and a digital display control panel, a mounting cavity and a testing cavity are formed in the testing table, and two clamping structures are arranged in the testing cavity. A second electric telescopic rod capable of driving one of the clamping structures to move in the test cavity is arranged in the test table, and an eccentric connecting rod driving mechanism capable of driving the other clamping structure to move in the test cavity in a reciprocating manner is arranged in the mounting cavity; the eccentric connecting rod driving mechanism can simulate the plugging action of an electric connector joint through the transmission of a rotating motor, a speed reducer, a turntable, a connecting rod and a driving shaft; the pressure sensor monitors the plugging force in real time, the vibration motor simulates the vibration working condition, the performance of the electric connector joint in actual use can be tested more comprehensively, the deviation adjusting structure can adjust the position of the driving head end of the driving shaft, tests in different deviation states are simulated, and the accuracy and authenticity of the tests are further improved.

The invention discloses a detection method of a high-speed connector and a related device, and the method comprises the steps: carrying out the plugging motion control of the high-speed connector, injecting a pulse sequence carrying a displacement mark into a differential signal pair in the process, and obtaining the initial reflection data containing a plugging displacement-time index; space-time boundary information of a gap coupling section, an initial touch deformation section and a full-insertion steady-state section is analyzed and determined in a segmented mode through reflection characteristics. And generating a mutual excitation pulse pair in the initial touch deformation section, and executing differential sampling processing by using a thermal-electric coupling effect to obtain a thermally induced group delay sequence and a geometrically induced impedance differential sequence. A dynamic zero-reflection anchor point is generated based on double-sequence fusion, and real-time reference plane migration processing is realized to obtain a calibration impedance curve. And repeating the processes of insertion and extraction, generating an elastic difference curve through displacement-time coaxial difference processing of a bidirectional calibration impedance curve, and positioning an irreversible abnormal section of the impedance. According to the method, the plugging transient impedance change can be continuously monitored, and the early failure risk of the high-speed connector can be evaluated in time.

The invention discloses a terminal crimping quality detection method and system, and relates to the technical field of terminal crimping image detection. Comprising the steps that space coordinates of a standard datum point in a crimping image are determined, and the standard datum point is used for representing the space coordinate position, meeting the standard terminal crimping inspection standard, between a corresponding wire and a terminal notch. According to the method, the crimping samples which do not meet the standard terminal crimping inspection standard are rapidly removed in a spatial positioning mode, and then the crimping sample thermal imaging images which do not meet the standard terminal crimping inspection standard are obtained on the crimping surfaces of the crimping samples by means of trigger logic. According to the method, the crimping samples are detected, the invisible faults of the crimping samples are judged based on the set standard terminal crimping inspection standard, and finally different commands are input to the crimping equipment according to the types and severity levels of the invisible faults, so that the rapid detection of the crimping samples and the dynamic adjustment of the crimping equipment are realized, and the stability of the monitoring dimension of the crimping quality is ensured.

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.

Systems and methods for detecting intermittent connections in a battery energy storage system (BESS) subsystem are disclosed. For each battery rack in the BESS subsystem, current time series data is received. A current rolling average is determined for each data point of the time series data by averaging current values of timestamps over a specified time interval. A current delta is determined for each data point, where the current delta is a difference between the current rolling average associated with the battery rack under analysis and a mean of the current rolling averages associated with the other battery racks in the BESS subsystem. A distribution profile of the current deltas is analyzed to detect a current anomaly at the respective battery rack. In response to detecting the current anomaly at the battery rack under analysis, an alert indicative of a faulty connection is displayed on a user interface.

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.

A battery pack includes a plurality of battery subpacks and voltage detection circuits, a current detection circuit, and a BMS. Each battery subpack and one connection component connected to the battery subpack form one to-be-detected assembly. The current detection circuit is configured to detect a current of the charge / discharge loop. The voltage detection circuit is configured to detect voltages at two ends of the to-be-detected assembly. The BMS is configured to: obtain the current of the charge / discharge loop and voltages at two ends of each to-be-detected assembly based on a preset period, generate a current sequence and a first voltage sequence of each to-be-detected assembly, calculate an impedance of each to-be-detected assembly based on the current sequence and the first voltage sequence, and when the impedance is greater than or equal to an impedance threshold, determine that the connection component in the to-be-detected assembly is abnormally connected.

The invention aims to provide an on-line monitoring device and a detection method for an electrical loop, and relates to a method and a system for dynamically calculating a conductor or contact resistance value and predicting a conductor or connection point degradation risk by acquiring current and voltage data of a conductor or an electrical connection point in real time, and a method and a system for dynamically analyzing a resistance change trend to determine a conductor or connection point degradation risk. Early warning of the health state of the conductor or the connection point is achieved, and the electrical fire prevention and control capability can be improved. The system comprises an electrical loop, a current detection module and a voltage detection module, the current detection module is arranged in the electrical loop to be detected, the voltage detection module is connected to the two ends of the electrical loop, and the current detection module and the voltage detection module are both in communication connection with a server through a data processing module and a networking module. The method is applied to the technical field of AC / DC power supply and distribution system electrical equipment / line resistance and electrical connection point contact state monitoring.

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.

The invention discloses a wiring detection method for an intelligent electric energy meter and a related product, and the method comprises the steps: obtaining the measurement data of a phase line collected by the intelligent electric energy meter in a preset time period, the measurement data comprises phase current data, and each sampling point in the phase current data comprises an A-phase current and a C-phase current; determining the number of sampling points of abnormal phase current in the phase current data; and determining the wiring fault type of the intelligent electric energy meter according to the ratio of the sampling point number of the abnormal phase current to the sampling point number of the effective phase current in the phase current data. By means of the method, wiring errors such as misconnection of the current loop of the intelligent electric energy meter can be accurately recognized.

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 relates to an electrical impedance detection method and device, an electronic device and a storage medium, which are applied to the field of electrical impedance imaging, and the electrical impedance detection method comprises the following steps: obtaining an electrode signal of a target electrode in a measurement area; a plurality of preset electrodes are attached to the measurement area; the target electrode comprises any one of a plurality of preset electrodes; the electrode signal carries excitation electrode data and measurement electrode data generated by the target electrode; determining a fluctuation value of the target electrode according to the excitation electrode data and the measurement electrode data; when the fluctuation value is within a preset fluctuation threshold range, based on a preset electrode measurement method, electrode contact impedance of the measurement area is obtained; and generating an electrode adjustment result based on the electrode contact impedance and sending the electrode adjustment result to the client. According to the method and the device, the problem that the efficiency of electrical impedance measurement is relatively low due to the fact that whether the electrode falls off or is in poor contact cannot be quickly judged during bioelectrical impedance imaging is solved.

Various embodiments disclosed by the present invention include an exemplary system for remotely testing the continuity of electrical wiring, an electric vehicle charging system, and a charge coupler for an electric vehicle charging system. In an exemplary embodiment, the system for remotely testing the continuity of electrical wiring includes a signal generator configured to generate a signal having a predetermined frequency. A controlled impedance network is configured to attenuate the signal. The controlled impedance network can be electrically connected towards a first end of the electrical wiring, which is terminated at a terminal at the first end and can be electrically connected to the signal generator at a second end to carry the signal. A signal detector is configured to detect the signal.

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.

Provided are a battery management system and a battery pack including the same. The battery management system includes a plurality of slave managers provided to correspond to a plurality of battery modules, and configured to uniformly adjust cell voltages of a plurality of battery cells of respective battery modules, a master manager configured to detect a battery module having a contact defect therein among the battery modules as a defective module using a voltage deviation that is a difference between a maximum value and a minimum value of the cell voltages, and a data transmitter configured to electrically connect the master manager and the slave managers to enable data exchange.

The utility model provides a socket test tool, and relates to the technical field of electrical switch manufacturing. The socket testing tool comprises a socket clamp, a plug fixing piece, a driving mechanism and an angle adjusting mechanism. The socket clamp is used for clamping a socket to be tested; the plug fixing piece and the socket clamp are oppositely arranged, and a plug is arranged on the face, facing the socket clamp, of the plug fixing piece. The driving mechanism is in driving connection with the plug fixing piece and used for driving the plug fixing piece to get close to or away from the socket clamp; and the angle adjusting mechanism is used for adjusting the angle between the plug fixing piece and the socket clamp, so that the plug is aligned with a jack of the socket at a preset angle to be inserted. By using the socket test tool, whether the socket is qualified or not is judged according to whether the plug can be inserted into the socket at the preset angle or not, so that insertion test is performed on the socket, unqualified sockets can be eliminated in an auxiliary manner, and the use experience of a user is improved.

The invention provides a vehicle sensor test tool, a test device and a test method. The test device comprises a test box, a cover plate, a mounting plate, a display screen, a control unit and the like. The test method comprises the following steps: firstly, mounting the gear sensor, the rotating speed sensor, the electromagnetic valve plate and the plug in corresponding mounting grooves of the test box; turning on a power supply, and checking a circuit conduction state and initial data of each sensor through a display screen; the shifting part of the gear sensor is manually shifted to verify the gear detection accuracy; controlling the motor to drive the gear at different rotating speeds, and comparing the rotating speed of the motor with detection data of the rotating speed sensor to judge performance; and disassembling the components after the test is completed. According to the method, an integrated device is utilized, joint testing can be carried out on various vehicle sensors and plugs at the same time, whether all parts are qualified or not is rapidly detected by simulating actual working conditions, the detection process is simplified, the detection efficiency and accuracy are remarkably improved, and the testing cost is reduced.

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.