882results about "Electric connection testing" patented technology

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 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 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.

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 provides a safety early warning method and system for a discharge process of V2G equipment, and electronic equipment. The method comprises the steps of obtaining multi-dimensional monitoring parameters of the V2G equipment in the discharge process; performing feature extraction on the multi-dimensional monitoring parameters to obtain feature information used for representing the running state of the V2G equipment in the discharging process; executing preset data fusion analysis based on the feature information to obtain a system security state evaluation result; comparing the system safety state evaluation result with a preset early warning threshold value, and determining a corresponding early warning level; and generating an early warning strategy corresponding to the early warning level, and outputting corresponding early warning information based on the early warning strategy. In the mode, by acquiring the multi-dimensional monitoring parameters in the discharge process of the V2G equipment, potential safety hazards in the discharge process can be accurately identified, so that the accuracy and timeliness of a safety early warning result are guaranteed, and the operation stability and reliability of the interaction process of the V2G equipment and a power grid are further improved.

According to the double-fed fan wiring terminal contact fault on-line detection system provided by the invention, through electric-thermal-mechanical multi-physical quantity collaborative analysis, the early recognition rate of the terminal contact fault is remarkably improved; precise alarm under different load working conditions is realized by utilizing a self-adaptive threshold adjustment function of the edge calculation module; based on a multi-dimensional feature fusion algorithm of a cloud digital twinborn model, a material degradation rule calibrated by a laboratory is combined with real-time operation data, so that the prediction accuracy is greatly improved; an automatic response chain from early warning to emergency disposal is achieved through a grading decision mechanism, the manual inspection frequency is reduced, and meanwhile the fault positioning precision is further improved through three-dimensional coordinate positioning and adjacent terminal cooperative detection.

The invention discloses a high-voltage connector interlocking signal detection method and system, and relates to the field of electric automobiles, energy storage systems and industrial high-voltage electrical equipment.The method comprises the steps that a classification network module identifies a high-voltage connection device, analyzes historical connection data through a classification optimization model, and generates a high-reliability waveform spectrogram; according to the invention, extraction, fusion and threshold determination are carried out on multi-dimensional features such as frequency FRE, voltage amplitude AMP and waveform consistency COR of an interlocking loop return signal, so that intelligent identification of a connection state is realized; and when the characteristics deviate from the normal range, the multi-dimensional threshold value judgment model can compare a preset threshold value set THRset to automatically judge the connection state, and outputs a normal connection or abnormal disconnection label, so that the real-time monitoring of the interlocking loop operation state is realized. According to the judgment mechanism based on the dynamic waveform characteristics, the detection precision and the anti-interference capability can be remarkably improved, misjudgment is avoided, and the operation reliability and safety of a high-voltage connection system are improved.

The invention discloses an early warning system and method for looseness of a wiring terminal of a distribution box, and relates to the technical field of power equipment monitoring, and the system comprises a miniature vibration sensor module which is installed in the center of a polished rod section of a connecting bolt of a target wiring terminal in an embedded manner, and is used for collecting a micro-amplitude mechanical vibration signal; the non-contact infrared temperature measurement module is over against the surface of the wiring terminal and is used for monitoring the temperature and calculating the temperature rise rate; the edge calculation unit, the vibration sensor module and the infrared temperature measurement module are in communication connection, synchronously acquire data, extract vibration spectrum characteristics and temperature rise rate, and perform fault judgment based on a preset coupling criterion; and the wireless communication module uploads the early warning event to a remote monitoring platform. The method has the advantages that data are acquired through cooperation of the rigidly coupled miniature vibration sensor and the multi-angle infrared temperature measurement module, real looseness and load fluctuation interference are effectively distinguished by combining a dynamic threshold value and a multi-physics coupling criterion, the weak looseness characteristic signal acquisition sensitivity is improved, and the multi-physics coupling criterion is accurately identified.

The invention belongs to the technical field of conductive connection crimping quality detection, and particularly relates to a cable branch box terminal crimping quality judgment method based on resistance dynamic monitoring, and the method comprises the steps: synchronously obtaining a terminal voltage sequence and a terminal current sequence at two ends of a terminal in a monitoring period; acquiring resistance distribution parameters representing static and time domain characteristics of the crimping interface; calculating a resistance fluctuation index; calculating a contact defect index; obtaining an abnormal section and an abnormal section characteristic parameter; obtaining an average defect degree; calculating a quality risk index; terminal fault grade judgment is carried out, and visual data are generated; and generating a delivery quality detection report. The technical problems that transient jitter and thermal drift cannot be captured and thermal damage assessment is lacked in the prior art are solved.

The application relates to a detection device for detecting the position of a conductor, a wire processing device and a method for detecting the position of a conductor in wire processing. The detection device for detecting the position of a conductor comprises a support, a plurality of conductive probes which are arranged on the support and are spaced apart from each other, and the conductive probes have a detection position. In the detection position, whether the measured wire is located at a specified position is judged by detecting whether the conductive probes are electrically connected through the measured conductor. The detection device for detecting the position of a conductor, the wire processing device and the method for detecting the position of a conductor in wire processing can automatically detect whether the conductor is at a specified position, and provide a basis for further automatic processing of the wire.

The invention provides an electric wiring component, a consumable chip and an ink box, and relates to the technical field of integrated circuit manufacturing and integrated circuit design. The electrical wiring member includes a plurality of contact points for contacting a contact pin of the image forming apparatus; the plurality of contact points comprise a plurality of corner contact points and a plurality of non-corner contact points; at least two corner contacts are suspended contacts, and the suspended contacts are in contact with the contact pins but are not electrically connected with the printing head chip; according to the invention, at least two corner contacts are suspended contacts, so that the number of corner contacts electrically connected with the imaging equipment is reduced, and the problems that the corner contacts cannot be normally and electrically connected with corresponding contact pins due to pollution, so that the contact between the consumable chip side and the terminal of the imaging equipment main body side is insufficient, and the service life of the imaging equipment is prolonged are solved. And the consumable chip and the imaging equipment cannot be in normal contact and electrical connection.

The invention relates to the technical field of power system monitoring, and discloses a cable connection monitoring system based on contact resistance analysis, and the system comprises a signal collection unit which is connected to a cable connection end of a power supply loop and is used for collecting an instantaneous voltage and current sequence and separating an inherent ripple component; the impedance track mapping unit is used for mapping the ripple voltage and the current component to generate a ripple voltage-current response track; the linearity deviation analysis unit is used for calculating a fitting deviation sequence of the track sampling points based on a reference linear model; by analyzing the transient thermal response nonlinear characteristics of the connection points to the high-frequency ripples, the problems that a blind area exists in traditional static resistance measurement and infrared thermal image detection lags behind are effectively solved, and the stability of the static resistance measurement is improved. Therefore, early contact degradation such as loosening can be identified.

The invention discloses an intelligent electric power measurement and decision-making method based on an Internet of Things architecture, and aims to solve the problems of large temperature measurement deviation, poor dynamic adaptation, unquantified aging influence and extensive meter change decision-making in the prior art. The method comprises the following steps: collecting multi-source data, denoising and fusing, and generating a fused temperature observation value; inputting historical time sequence data formed by the data and the fusion temperature into the TCN, and outputting a state matrix increment to correct a Kalman filtering state equation; optimizing a filtering noise covariance matrix through PSO (Particle Swarm Optimization); based on the correction equation and the optimal noise matrix, the initial temperature of the contact is obtained through improved Kalman filtering; in combination with an SVR model, the aging compensation amount is calculated by taking the multi-source denoising data and the initial temperature as input, and the final temperature is obtained through superposition; and calculating an aging influence coefficient according to the aging compensation amount and the final temperature, and executing early warning or meter replacement. According to the invention, temperature prediction precision and long-term stability are improved, intelligent meter changing decision is realized, and equipment safety and operation and maintenance efficiency are guaranteed.

The utility model discloses a wire harness welding detection device, which relates to the technical field of welding detection and comprises a base, a supporting vertical plate is arranged at the top of the base, fixing seats are fixedly connected to the upper portion and the lower portion of one side of the supporting vertical plate respectively, second sliding rails are arranged on the fixing seats respectively, and second sliding blocks are installed on the second sliding rails in a matched mode. The base is in sliding connection with the base; one side of the second sliding block is fixedly connected with a vertical plate; a movable pressing assembly is fixedly connected to the outer side of the vertical plate and comprises a supporting frame, a cavity is formed in the supporting frame, a sliding frame is arranged in the cavity, a fixing plate is fixedly connected to the outer side of the bottom end of the sliding frame, a fixing block is fixedly connected to the inner side of the fixing plate, and a groove is formed in one end of the fixing block; a wire harness pressing plate is installed in the groove in a matched mode. According to the utility model, in the wire harness welding detection process, the wire harness welding point is accurately positioned and detected, and the detection accuracy of the wire harness welding point is greatly improved.

The utility model provides a communication cable detection device, comprising a detection host and a detection auxiliary machine, two ends of a communication cable to be detected are respectively connected with the detection host and the detection auxiliary machine through a first joint and a second detection joint; the detection host comprises a signal transmitting device, the communication cable to be detected comprises a shielded wire and other core wires, a light emitting diode L1i is arranged between a core wire i and the shielded wire in the detection auxiliary machine, in the detection host, the ground of the signal transmitting device is connected with the shielded wire, and the output end of the signal transmitting device is respectively connected with the core wire i in the communication cable to be detected; the grid electrode and the cathode of the silicon controlled rectifier Vi are respectively connected with the output end of the transmitting device and the core wire i in the first connector, and the anode of the silicon controlled rectifier Vi is connected with the positive electrode of the power supply; i is a natural number and is a serial number of a core wire in the communication cable to be tested. According to the utility model, the on-off of the communication line can be detected, and whether the conduction quality of the communication joint and each wire core is stable and reliable can be detected.

A detection system including a first module, a second module and an interface configured to allow the first module and the second module to be detachably coupled to each other. The first module includes a first detection circuit and the second module includes a second detection circuit coupled together on a single detection line. The first detection circuit measures voltage on the single detection line to determine if the second detection circuit is connected thereto and if so, whether the second detection circuit is being powered, and the second detection circuit measures voltage on the single detection line to determine if the first detection circuit is connected thereto and if so, whether the first detection circuit is being powered.

The invention relates to the technical field of intelligent sockets, in particular to an intelligent socket on-off and safety pre-warning system based on the Internet of Things technology, which performs convolution and pooling operation on a two-dimensional fluctuation mapping graph through a convolutional neural network, combines edge intensity frequency band energy and amplitude difference to generate a label and judges whether the label is unknown through a threshold value. According to the method, abnormal event records are formed through confidence scaling and window consistency, deviation generated by a single frame map is avoided, the fault recognition precision, the state prediction reliability and the instruction execution controllability are effectively improved, transfer statistics is conducted on historical states and abnormal records through a Markov chain, and the fault recognition accuracy is improved. A matrix is generated, combined modeling of the state, the electricity price and the time period is achieved, transition probabilities of different power consumption states can be quantified, power failure is triggered when high power consumption and temperature rise parameters are superposed, and it is guaranteed that power failure is triggered through high power consumption and high electricity price, power-on is maintained through low power consumption, power failure is maintained in a closed state, and emergency power failure is triggered through continuous abnormity.

The invention discloses a power supplier circuit with multiplexing pins and a control method thereof. The power supplier circuit comprises a first multiplexing pin and a second multiplexing pin which are used for communicating and sensing temperature. A temperature sensing element is coupled between the first and second multiplexing pins. In a connection detection mode, a connection detection current is provided through the first and / or second multiplexing pins to detect whether a power receiving side circuit is connected to a power supply side circuit. The power receiving side circuit comprises a pull-down resistor coupled to the first and / or second multiplexing pin, and is used for judging whether the power supply side circuit is connected with the power receiving side circuit or not. When the power receiving side circuit is connected to the power supply side circuit, in a temperature sensing mode, the first and second multiplexing pins are arranged in a temperature sensing configuration to generate an electrical characteristic on the temperature sensing element, and the electrical characteristic is obtained through the first and / or second multiplexing pins, thereby sensing temperature and generating temperature information.

The present application relates to the technical field of short circuit detection, and provides an alternating current charging pile charging socket short circuit detection circuit and a detection method thereof. The alternating current charging pile charging socket short circuit detection circuit comprises: a charging circuit connected to a power frequency alternating current power supply, wherein the charging circuit comprises an alternating current energy metering circuit, a relay and a power socket connected in series; a detection circuit connected in parallel to both ends of the relay; and a control circuit connected to the alternating current energy metering circuit and the relay respectively. The alternating current charging pile charging socket short circuit detection circuit provided by the present application fundamentally avoids the charging pile failure caused by the load short circuit of the power socket, and reduces the operation and maintenance cost of the product.

The invention relates to a probe head, which comprises a probe seat, a plurality of vertical probes and a plurality of coaxial probes, the vertical probes slidably penetrate through guide holes of the probe seat, the lower ends of the vertical probes are used for contacting conductive contacts of a tested device, and each coaxial probe comprises a probe body and a tip unit arranged at the lower end of the probe body. The probe body comprises a plurality of conductors which are mutually insulated, the needle point unit comprises a first needle point and a second needle point which are electrically connected with the plurality of conductors respectively and are used for being in contact with a conductive contact of a tested device, and the plurality of coaxial probes comprise a first return probe and a second return probe which form a return probe pair and are used for being configured to be a local part of a return test path; therefore, the high-frequency loopback test requirement can be met.

Disclosed is an apparatus including a moving block configured to have an inner space open toward one side and to be movable in a forward direction toward a cradle formed on a connector jig and a rearward direction, a mating case movably installed in the movable moving block, a shape of which is such that if a portion protrudes from a connector surface, movement in a forward direction thereof is blocked by the portion of a TPA connector installed in the cradle, and a contact switch configured to change an electrical state thereof when the mating case moves in a rearward direction at a predetermined interval with respect to the moving block, wherein the moving block is configured to further move in a forward direction at least at a predetermined interval even in a state in which the mating case cannot move in a first direction.

The invention relates to a method for testing a wire harness (100) on a wiring board (1), the wire harness comprising a plurality of wires (10) connected between a plurality of wiring connectors (14), the wiring connectors comprising respectively at least one electric wire terminal (12) associated with at least one of the wires. The method comprises: providing a plurality of test adapters (20, 20a, 20b), comprising a master test adapter (20b) having a power supply (3) and a satellite test adapter (20a), wherein each test adapter comprises at least one testing terminal (22) configured for being electrically connected to the at least one electric wire terminal of the respective wiring connector, connecting a first electric wire terminal of a first wire to the testing terminal of the master test adapter, connecting a second electric wire terminal of the first wire to the testing terminal of the satellite test adapter, powering, through the power supply, the master test adapter, powering, by the master test adapter, the satellite test adapter through the first wire, and testing an electrical connection between the master test adapter and the satellite test adapter through the first wire.

The utility model discloses wiring terminal inspection equipment, and relates to the technical field of inspection equipment. The device comprises a mounting shell, the top of the mounting shell is rotatably connected with a supporting shell, the device further comprises a mounting mechanism, a workpiece is arranged above the supporting shell through a connecting mechanism, then the forward workpiece is inspected, then a motor is started, the motor drives a rotating shaft to rotate, the rotating shaft drives a rotating plate and a dragging plate to rotate, and the rotating plate and the dragging plate rotate. The dragging plate drives the dragging rod to rotate, the dragging rod drives the cross-shaped rotating shell to rotate intermittently, then the supporting shell rotates by a half circle to enable the workpiece on the right side to rotate to the front, then a worker inspects the workpiece, and then the operation is repeated for inspection, so that multiple workpieces can be continuously inspected; through the operation, intermittent and continuous inspection work on the workpiece is achieved, inconvenience caused by frequent disassembly and assembly is effectively avoided, operation steps and time consumption are reduced, and the continuity and efficiency of the inspection process are improved.

Method for testing an assembly (2) for an electric machine, in particular an externally excited synchronous machine, comprising two electrical conductor elements (3, 4) which are connected to one another by a crimp connection (5), wherein the crimp connection (5) is cyclically loaded, in particular by applying a test force to one of the conductor elements (3, 4), wherein a connection parameter of the crimp connection (5) is determined.

A system (12) for a vehicle, an assembly (10), and a method for detecting a connection state of a switching device (62) of a charging circuit (56) are provided. The system (12) comprises at least one stator coil (30) of an electric machine (18), an inverter (16), and a charging circuit (56). The inverter (16) is configured to be coupled to a battery (14) of the vehicle. The charging circuit (56) is configured to be coupled to a charging device external to the vehicle. The charging circuit (56) is further configured for adapting a charging program of the battery (14) of the vehicle. The charging circuit (56) comprises at least a capacitor (64) and the switching device (62). The switching device (62) is arranged between the capacitor (64) and the stator coil (30). A single voltage sensing element (66) is arranged between the switching device (62) of the charging circuit (56) and a star point (60) of the electric machine (18). A control circuit (36) is configured to detect the connection state of the switching device (62) of the charging circuit (56) based on a voltage magnitude measured by the voltage sensing element (66).