38results about How to "Improve on-site inspection efficiency" patented technology

The invention relates to an electric energy meter abnormity diagnosis method comprising the following steps: in a first step, electric energy meter data and event data are obtained via on-site detection and an electric energy information collection system; in a second step, the electric energy meter data and the event data that are obtained in the first step are subjected to single abnormity analysis operation which comprises six types of intelligent diagnosis and analysis models, and each intelligent diagnosis and analysis model comprises a number of intelligent diagnosis themes; in a third step, single abnormity analysis and diagnosis results of the intelligent diagnosis themes obtained in the second step are output to on-site detection personnel, and the on-site detection personnel can be assisted in electric energy meter detection and diagnosis. Via technological means such as data comparison, statistical analysis, data mining and the like, the electric energy meter abnormity diagnosis method can be used for diagnosing and analyzing electric energy meter operation conditions, and whether an electric energy meter is in a normal operation state can be effectively determined.

The invention relates to a method for intelligently diagnosing an electric energy meter. The method includes the following steps: 1. acquiring data of an electric energy meter and event data through field detection and an electric energy information acquiring system; 2. analyzing single faults the data of the electric energy meter and the event data which are acquired from 1, single faults analysis including 6 types of intelligent diagnosis analysis models of which each includes a plurality of intelligent diagnosis themes; 3. analyzing fault association of the association relations among different intelligent diagnosis themes and establishing an association model so as to obtain the result of further intelligent diagnosis; 4. and outputting the result of the single fault diagnosis of the intelligent diagnosis themes from 2 and the result of further intelligent diagnosis from 3 to a field detection worker, helping the field detection worker to detect and diagnose the electric energy meter. According to the invention, the method diagnoses and analyzes the operation of the electric energy meter through data comparison, statistics analysis and data mining, which can effectively determine whether the electric energy meter works normally.

The invention discloses a breaker state detection method based on waveform characteristics identification. The method comprises the following steps: collecting the breaker opening and closing current signal of the breaker in the normal working condition; decomposing it into a number of function components in intrinsic mode; adding the first three-order function components in intrinsic mode to form a de-noising signal and expressing it in the Cartesian coordinate system; selecting characteristic points with equal intervals on the current waveform; connecting the origin of the coordinate and the characteristic points to form a set of waveform characteristic vectors; using the same steps to calculate the actual current signal of the breaker to obtain a set of waveform characteristic vectors; defining the similarity and comparing the two sets of characteristics vectors; and based on the similarity of the two sets of vectors, determining the state of the breaker. The detection method of the invention is capable of achieving high effective and accurate diagnosis over the breaker fault, can effectively remove the noise interference in the current signal, eliminate the influence of incorrect extraction of waveform characteristics on the determination result, and improve the accuracy and efficiency of calculation.

The invention discloses a transducer for exciting and receiving multimode ultrasonic guided waves in a pipe, and belongs to the technical field of non-destructive testing. The transducer is characterized by comprising two shearing piezoelectric wafers, wherein the two shearing piezoelectric wafers are horizontally arranged up and down; the vibration directions of the two shearing piezoelectric wafers are the same with respective polarization directions thereof; the polarization directions of the two piezoelectric wafers are mutual orthogonal; and the two piezoelectric wafers are electrically isolated from each other through an isolation layer positioned therebetween. Execution signals are applied on the two piezoelectric wafers respectively, so that the transducer can load different directional loads needed by exciting different mode guided waves on the surface of a detected structure, and the different mode guided waves transmitted along the axial direction of the detected structure can cause the vibration of the piezoelectric wafers to generate voltage signals for analyzing and processing when the main vibration direction of the piezoelectric wafers is the same with the polarization direction of one piezoelectric wafer. The transducer has the effects and the benefits that single one-way guided waves with different modes can be excited and received in the structure through mounting three circles of transducer arrays once along the axial direction of the detected structure, the application is simple, and the scene detection efficiency is high.

The invention discloses a high-tension porcelain insulator flaw-detection creeping wave probe clamp. The high-tension porcelain insulator flaw-detection creeping wave probe clamp comprises a retractable rotating porcelain insulator clip with a movable part and a fixing part, and a compacting crank arm, wherein the movable part and the fixed part define a ring structure when being closed, the compacting crank arm is used for fixing a probe, rubber wheels are arranged at intervals along the annular directions of the fixed part and the movable part, and the rubber wheels rotate along the direction of an annular plane defined by the fixed part and the movable part. According to the high-tension porcelain insulator flaw-detection creeping wave probe clamp, the creeping wave probe is fixed on the stable rotating porcelain insulator clip, and the moving of the probe is realized through the integral sliding of the rotating porcelain insulator clip, so that the detecting range is wide, the probe moves more smoothly, the speed is more uniform, and the problem of high possibility of detection dead angles caused by the conventional detection method that a probe is held by a hand is solved; moreover, the compacting crank arm is used for providing the pressure applied to the probe, so that the attaching between the probe and the porcelain insulator is compact, and stress is more uniform, and detection errors caused by different pressing force degrees of different detectors are reduced to the greatest extent.

The invention belongs to the technical field of partial discharge live detection equipment and especially relates to an IoT identity based GIS partial discharge live detection and data management platform. The platform includes an IoT identity, a handheld partial discharge detector, a data analysis system, a mobile intelligent detection APP and a GIS equipment partial discharge detection management cloud platform. The IoT identity includes an RFID tag and a two-dimensional code tag. The RFID tag is mounted on a GIS general control cabinet. The two-dimensional code tag is mounted on a GIS equipment housing. The handheld partial discharge detector is connected with a PC. The data analysis system is connected with the handheld partial discharge detector. The data analysis system is connected with a GIS device partial discharge detection management cloud platform. According to the invention, related information of corresponding devices can be acquired before detection and manual recording is saved, missing detection is avoided. Field detection efficiency and detection report generating efficiency are improved substantially and basis is provided for field decision making.

The invention discloses a DC charger detection system and method, and the system comprises a vehicle controller simulation device which simulates a vehicle BMS control system, and builds the message data interaction with a to-be-detected off-board charger through a CAN line in a charging gun; a vehicle fault state is simulated through each contact on the vehicle socket according to the received control instruction; a detection device acquires communication message data between the vehicle controller simulation device and the to-be-detected off-board charger, translates the message data into apredetermined format, analyzes the communication protocol consistency between the vehicle controller simulation device and the to-be-detected off-board charger according to a preset rule, acquires a communication protocol consistency analysis result and stores the communication protocol consistency analysis result; the waveform detection signals of all contacts and contactor signals or a front-endvoltage of the non-vehicle-mounted charger to be detected in the simulated vehicle fault state of all the contacts are collected, and an interoperation test detection result of the non-vehicle-mounted charger to be detected is obtained through a comparison result of a difference value between the waveform detection signal and the contactor signal or the front end voltage and a preset threshold value; and a main control computer outputs a control instruction.

The invention discloses a method and device for carrying out state evaluation on an electric energy meter field calibration instrument. The method comprises the steps of: acquiring preset parameters;carrying out index decomposition on a state evaluation aspect of the electric energy meter field calibration instrument, and determining quantified state items which can be used for evaluating a stateof the electric energy meter field calibration instrument; according to the preset parameters and an electric energy meter field calibration instrument state evaluation model, determining weight values and quantified values of the quantified state items, and calculating a score result of the electric energy meter field calibration instrument; and according to the score result and a preset early warning threshold, carrying out early warning on the electric energy meter field calibration instrument. According to the method, state evaluation is introduced into the electric energy meter field calibration instrument, and by carrying out state evaluation on a field state of the electric energy meter field calibration instrument, problems of the electric energy meter field calibration instrumentare timely found and treated, so as to promote efficiency of electric energy meter field detection, ensure accuracy of electric energy meter field detection and reduce economic loss caused by inaccuracy of the electric energy meter field calibration instrument.

The invention provides a design method of an electric vehicle battery simulation system for off-board charger field detection, and aims to solve the problem that a charging load for off-board chargerfield detection is large in size and heavy in weight and is limited by external factors such as vehicle loading space, load and underground garage height limit. A power battery model is combined witha lightweight charging load, and the parameters of the charging load are adjusted in real time through the online estimation of the state of charge of the power battery model and the electromotive force of the battery so as to simulate the charging response of the power battery. A light-weight charging load is formed by cascading a vehicle-mounted power battery pack with a direct-current converter, and meanwhile, the system has constant-voltage, constant-current, constant-power and constant-resistance modes and has the capability of continuous adjustment within a rated range. An acceleration coefficient is introduced on the basis of a traditional power battery model, parameters such as the type, the specification, the temperature and the voltage of a battery can be set online according todetection requirements, and the autonomous testing of the off-board charger is achieved while the requirement for light weight of a charging load is met.

The invention discloses a rivet mandrel ejection force detection tool. The tool comprises a riveting piece, an ejector rod, an upper base and a lower base, wherein the upper base and the lower base are opposite to each other up and down. The riveting piece is arranged in a first groove. The riveting piece comprises an upper riveting piece and a lower riveting piece. The upper riveting piece and the lower riveting piece are riveted through a tested rivet. The different riveting pieces can rivet different types of tested rivets, the upper base is pressed downwards to make the ejector rod eject out of a head of a mandrel of the tested rivet, applied pressure, which is an ejection force of the rivet, is detected by pressure detection equipment, and therefore, the tool does not need to be replaced, and the ejection forces of different rivets can be tested by replacing the riveting pieces.

The invention relates to the field of electrical error detection devices,in particular to a rolling-type insulation detection device. The device includes roller electrodes,insulating side plates and an insulating handle,the two roller electrodes on the front and rear sides are rotatably fixed between the two parallel insulating side plates,the insulating handle is of a hollow structure and fixed to the middles of the insulating side plates,and a wire penetrates through the insulating handle and achieves electric conduction with the roller electrodes. The rolling-type insulation detection device breaks through the limitation that insulating rods and insulating ropes can only achieve spot measurement; by adopting a rolling detection method,complete detection of a surface insulation resistorcan be achieved,and not only is the detection efficiency improved,the reliability of a detection result is improved,but also zero damage of insulating tools can be achieved.

The invention discloses a bidirectional adjustment self-suction phased array probe scanning device and an assembling and detecting method. The whole device is of a chain structure, the device comprises a probe clamping device, a plurality of component modules and an encoder. The plurality of component modules form a scanning device chain body; the probe clamping device is assembled on the left side of the scanning device chain body through a positioning shaft I; and the encoder is assembled on the right side of the scanning device chain body. The probe scanning device is adjustable in width and wide in application range; during field detection, only the upper edge of the scanning device needs to be close to the lower edge of a welding seam, the translation distance and translation parameters of the probe do not need to be adjusted and measured before each time of detection, the detection process is optimized, and the detection efficiency and the detection precision are greatly improved; the device is compact in structure, high in universality, convenient to disassemble and assemble and easy and convenient to operate.

The invention discloses an iron core loosening vibration data acquisition method and system. In the prior art, the diagnosis of the loosening of an iron core in a transformer still has certain defects, during transmission, if a UDP (User Datagram Protocol) transmission protocol is adopted, packet loss is easy to occur, and if a TCP/IP (Transmission Control Protocol/Internet Protocol) transmission protocol is adopted, the transmission is stable, but the efficiency is low. The requirement for iron core loosening vibration signal collection is high, the efficiency needs to be guaranteed, meanwhile, the integrity in the transmission process needs to be guaranteed, and the efficiency is not effectively improved when packet loss occurs in the transmission process through a UDP transmission protocol in the prior art. According to the invention, data packets are numbered and sequenced, the data packets are transmitted, a receiving end analyzes header numbers of the data packets, whether the data packets are lost or not is judged by analyzing the total number and the numbers of the data packets, and retransmission is carried out if the data packets are lost, so that UDP transmission is optimized, the integrity of data transmission is ensured, and the transmission efficiency is considered.

The invention discloses an impact device and a control terminal. The impact device comprises a case, an impact hammer and a power connecting end. The impact hammer is located at the bottom of the case and used for impacting on the ground, and a first driving device for driving the impact hammer to impact on the ground is arranged in the case. The impact device further comprises a walking device, a second driving device, a first wireless communication unit and a main controller, wherein the walking device is located at the bottom of the case and used for driving the case to walk; the second driving device is powered by the power connecting end and connected with the walking device and used for driving the walking device to walk in a predetermined direction at a predetermined rate; the first wireless communication unit is used for receiving a control command of the control terminal; the main controller is used for controlling the first driving device to drive the impact hammer to impact the ground and/or controlling the second driving device to drive the walking device to walk according to the control command. A detector can control the movement position of the impact device without climbing to a room on the upper layer, so that the detection process is simplified, the workload of the detector is reduced, detection time is shortened, and on-site detection efficiency is improved.

The invention relates to a power transformer multipath automatic on-site detection system and method based on the Internet of Things. The method comprises the following steps: a detected transformer is connected to a field detection terminal; basic parameters of the detected transformer are identified; an electronic fence is temporarily built, and a safety signal is sent to the field control center after the wireless electronic access control is closed; the field control center relieves test locking and sends a test confirmation instruction to the electronic key; after an operator selects agreement confirmation test, an agreement signal is sent to the field control center; the field control center sends a test starting instruction to the field detection terminal; the field detection terminal starts testing work; and after the test is completed, the field control center intelligently judges the test data to obtain a test result. According to the invention, wireless networking is carried out on all equipment, so that an operator absolutely keeps a safe distance from a test site in a detection process; meanwhile, distributed networking and synchronous operation of a plurality of field detection terminals can be realized, so that the field detection efficiency is greatly improved.

The invention provides a high-efficient power-grid on-site construction inspection system. The system comprises a line planning center, an intelligent mobile phone and a wireless hand-held terminal. A construction person carries the intelligent mobile phone so as to receive a power grid construction line issued by the line planning center. An inspection person uses the wireless hand-held terminal to communicate with the intelligent mobile phone carried by the construction person so as to realize on-site inspection. The system has advantages that an inspection range is enlarged and on-site inspection efficiency is increased.

The invention provides a detection system and method for reliable access of an electric energy meter field calibrator, and the method comprises the steps: a field calibrator is connected to a detection tool, the detection tool is inserted into a first preset position of an intelligent junction box, a first branch is switched on, and a second branch is switched off; main loop current is collected through a first sampling circuit, first branch current is collected through a second sampling circuit, and the main loop current is compared with the first branch current through a processor so as to determine whether the field calibrator is normally connected into a current loop or not; and after the on-site calibration instrument is normally connected to the main loop, the detection tool is continuously inserted into a second preset position in the junction box, so that the field calibrator can detect the electric energy meter. According to the invention, the first sampling circuit and the second sampling circuit are used for collecting the current in the corresponding branches, and then the processor is used for determining whether the field calibrator is accurately connected to the loopor not, thereby facilitating the improvement of the detection precision of the field calibrator, improving the on-site detection efficiency, and eliminating the potential safety hazards.

The invention discloses a method for automatic coloring penetration detection in a pre-detection stage of a power station pipeline. A detection instrument is adopted for detection; the detection instrument comprises a mechanical arm, a movable chassis and a height adjusting arm, the height adjusting arm is arranged on the movable chassis, the mechanical arm is installed at the end of the height adjusting arm, and the detection instrument is provided with cleaning rag and terminal equipment. The detection agent comprises a cleaning agent, a penetrating agent and a developing agent; the detection method sequentially comprises the following steps: performing pre-cleaning, performing drying, applying a penetrant, removing excess penetrant, performing drying and applying a developer. The environmental conditions are as follows: in the whole detection process, the temperature of the penetration detection agent, the surface temperature of the workpiece and the operating temperature are withinthe temperature range of 10-50 DEG C. According to the invention, the surface of a detected part can be accurately identified, and manual actual addition of a cleaning agent, a penetrating agent anda developing agent is replaced, so that the harm of the penetrating agent and the developing agent to a human body is avoided, the field detection efficiency is improved, the detection period is shortened, and the labor cost is reduced.