438results about "Multi-tester circuits" patented technology

The invention discloses a single-end open type high-performance magnetic shielding system and a design method thereof. The system is formed by combining a passive magnetic shielding subsystem and an active magnetic compensation subsystem. The passive magnetic shielding subsystem is formed by alternately nesting single-end open type high-permeability and high-conductivity metal barrels, and the structure is beneficial to synchronously improving the shielding capability for full-band magnetic interference; the active magnetic compensation subsystem is composed of a group of axial nonlinear gradient coils, two groups of radial nonlinear gradient coils with orthogonal magnetic fields and a magnetic compensation control circuit, and three groups of magnetic compensation coil windings are obtained based on specific nonlinear distributed magnetic interference reverse design in a single-end open type magnetic shielding barrel; different from conventional shimming and linear gradient coils, accurate compensation of magnetic interference in a working area in the barrel can be realized. According to the invention, the shielding capability of the single-end open type magnetic shielding system is improved, and a required near-zero magnetic environment is provided for extremely weak magnetic measurement.

The invention discloses a DC bus interference anomaly detection method based on a dynamic local outlier factor algorithm. The DC bus interference anomaly detection method is especially suitable for real-time operation state monitoring of a complex power system. Aiming at the limitation that a traditional anomaly detection method is high in calculation complexity and limited in detection precision in high-dimensional time series data processing, optimization is carried out on the basis of an outlier detection theory, a dynamic mode updating algorithm is provided, the algorithm evaluates outlier characteristics of time series data through local density, and the detection precision of the time series data is improved. The global calculation overhead is obviously reduced, and the real-time performance and the detection efficiency of the system are improved. Compared with a traditional method, the method consumes manual intervention, is high in detection precision and strong in early warning, can be widely applied to the field of health assessment and intelligent operation maintenance of power equipment, and shows a good engineering application prospect.

The invention relates to an anti-electricity-stealing monitoring method and device based on an intelligent universal meter, equipment and a medium. The method comprises the following steps: acquiring real-time electric sampling data of a universal meter, and preprocessing the data to obtain electric characteristic data; carrying out electricity stealing feature extraction on the electricity feature data by utilizing an edge electricity stealing detection model, and carrying out preliminary judgment on an electricity utilization type to obtain a preliminary judgment result; if the preliminary judgment result is at least one of an electricity larceny event and reverse feed, using a cloud electricity larceny detection model to perform secondary analysis on the electricity characteristic data to obtain an abnormal probability; and if the abnormal probability exceeds a preset threshold, generating a corresponding alarm work order, and pushing the alarm work order to a supervision platform. By adopting the method, the field acquisition capability of the intelligent multimeter can be fully combined, the local and cloud computing characteristics are combined, and the recognition and monitoring of electricity stealing behaviors such as low-current electricity stealing and reverse feed are effectively enhanced through a multi-source feature extraction and judgment mechanism.

The utility model relates to the technical field of power transmission and distribution control equipment detection, in particular to a power transmission and distribution control equipment detection device, which comprises a universal meter main body, a display screen is arranged at one end of the surface of the universal meter main body, and a plurality of uniformly distributed sockets are arranged in the middle of the surface of the universal meter main body; a collection mechanism which can quickly collect and arrange meter wires and improve the use effect of the device and is arranged at one end of the universal meter main body; by arranging the collecting mechanism and the storage assembly, two collecting rollers can rotate to take up and pay off inspection lines, the using effect of the device is improved, the inspection lines can be rapidly stored and arranged through the arrangement of the two collecting rollers, and the inspection lines can be prevented from being damaged when not in use; and through arrangement of a collecting roller, the knotting phenomenon of the inspection line in the using process can be reduced, the device is convenient to use, a fixing groove can store a connecting block, the meter line can be rapidly stored and arranged, and the using effect of the device is improved.

The invention relates to the technical field of emergency equipment, in particular to an emergency equipment intelligent management terminal power adapter which comprises an adapter body. The plug is arranged on the adapter main body; the socket is connected with the plug; the intelligent management terminal is connected with the adapter main body; the intelligent management terminal can detect the electric power information of the socket. According to the invention, power can be supplied to the digital management terminal of the generator, efficient and reliable power supply adaptation is realized, the output voltage and current of the generator are acquired, and the stable power supply requirement of the intelligent management terminal of the emergency equipment in an application scene of adapting to a small movable generator is met.

A universal power probe fixture (UPPF) that is configured to be installed into a power signal path between a source device and a load device has one or more UPPF base modules, each UPPF base module including an input terminal block, an output terminal block, and a power transfer circuit including a multiple signal lines electrically connected between the input terminal block and the output terminal block, the signal lines structured to convey high power, and each of the signal lines includes a current probe connection point and at least one voltage probe connection point. The UPPF also has a source device connector adapted to electrically connect the source device to the input terminal block, and a load device connector adapted to electrically connect the load device to the output terminal block. A test system using the UPPF, and an application-specific electric vehicle motor probe adapter are also disclosed.

The invention discloses a high-voltage direct-current line EM lightning arrester valve plate shunting non-uniformity test system and method, and belongs to the technical field of lightning arrester performance test.The method comprises the steps that S1, a high-voltage direct-current power transmission system simulation model is established, and the discharge current of an EM lightning arrester under the severe working condition of single-pole line short circuit is evaluated based on the high-voltage direct-current power transmission system simulation model; adopting square-wave pulse approximate discharge current, and determining the total amplitude and square-wave pulse width of long-wave discharge current of the EM lightning arrester; s2, applying the square wave pulse to the tested EM lightning arrester resistor discs through a shock wave test platform, and testing the current magnitude and the total current of each resistor disc of the EM lightning arrester under the working condition; the total amplitude and the square wave pulse width of the preset square wave pulse are the same as the total amplitude and the square wave pulse width of the long wave of the discharge current of the EM arrester; and S3, according to the current of each resistor disc and the total current, calculating a current non-uniform coefficient and the current range of the resistor discs. According to the invention, the current distribution non-uniformity of the multi-column parallel lightning arrester can be tested and evaluated more reasonably and comprehensively.

The invention provides an AC solid-state power controller isolation voltage acquisition circuit device, and the device comprises an AC voltage acquisition unit which is used for achieving the voltage acquisition of an AC solid-state power controller; the isolated power supply unit is used for providing an isolated power supply for the alternating-current voltage acquisition unit; the reference voltage unit is used for providing reference voltage for the AC voltage acquisition unit; and the power supply unit provides a power supply for the AC voltage acquisition unit. According to the technical scheme of the invention, the size of the sampling circuit can be reduced while voltage acquisition is realized, and the acquisition precision and safety of the sampling circuit are improved.

The invention discloses an overvoltage breakdown test system and method for a converter valve power module, and belongs to the technical field of direct current transmission, and the system comprises an auxiliary control unit and a capacitor energy storage unit which are connected in series, and a series branch where the auxiliary control unit and the capacitor energy storage unit are located is connected in parallel with a follow current branch. The two parallel ends are respectively connected to one end of the current limiting branch and the negative polarity end of the first charging power supply, and the other end of the current limiting branch is connected to the positive polarity end of the first charging power supply; the positive polarity end of the first charging power supply is further connected to a first output terminal Y1 of the sample power module through the change-over switch Ks, and the negative polarity end of the first charging power supply is further connected to a second output terminal Y2 of the sample power module. The device can be used for realizing overvoltage breakdown of the converter valve power module and surge short-circuit discharge of the capacitor, verifying the anti-explosion capability of the converter valve power module, and providing a verification means for the anti-explosion design of the power module.

The utility model discloses a battery cell performance test and electric quantity automatic equalization tool, which comprises a charging and discharging device, a digital multimeter and a bottom plate, the charging and discharging device is electrically connected with the digital multimeter, and the bottom plate is connected with a first fixing plate and a second fixing plate which are oppositely arranged. A limiting plate for fixing the battery cell is arranged between the fixing plate I and the fixing plate II on the bottom plate; the first fixing plate is connected with a sliding rod, the end, away from the limiting plate, of the sliding rod is connected with a push-pull clamp, the end, close to the limiting plate, of the sliding rod is connected with a first pole piece, the side, facing the limiting plate, of the second fixing plate is connected with a second pole piece, and the first pole piece and the second pole piece are connected with charging and discharging equipment and a digital multimeter through connecting wire harnesses respectively. The bottom plate is provided with a supporting plate used for being connected with and supporting the push-pull type clamp. According to the utility model, the rapid, reliable and safe connection between the battery cell and the test equipment can be realized, multiple types of battery cells can be compatible, the voltage can be automatically detected, and the electric quantity required to be balanced can be calculated for electric quantity balancing.

Described implementations monitor potential voltage at a location to determine device usage at the location. The implementations utilize a plug-in energy sensor that is plugged directly into any electrical outlet at the location and measures deviation in voltage at the location. Once plugged into an electrical outlet, the plug-in energy sensor monitors one or more of the lead line and ground, the neutral line and ground, and / or the ground line with respect to a reference for changes in potential voltage at the location. Different devices and different device states of those devices generate different signatures of voltage as they operate, thereby making the signatures unique, or almost unique, to different device types, different devices, and / or different device states. By monitoring for signatures in the voltage, operation of devices in different device states at the location can be determined, along with start times and stop times of those states associated with the various devices.

The automatic testing device comprises a verification mother board, a verification daughter board, a program control direct current power supply, a digital multimeter, an angle simulation instrument, a signal generator and an upper computer, and the upper computer is provided with upper computer software of the automatic testing device for the synchronous-to-digital converter. Power input, reference input voltage and angle synchronous input signals needed by the synchronous-digital converter are provided, and normal work of the two-channel synchronous-digital converter is achieved. Synchronous conversion angle signals and reference voltage are input through the angle simulation instrument, the converter outputs corresponding binary bit angle digital signals, and the controller collects the corresponding angle digital signals, converts the angle digital signals into angles and transmits the angles to the upper computer through a serial port. And the high and low levels output by the synchronous-digital converter are measured by the digital multimeter and then are transmitted to the upper computer. And finally, the upper computer judges whether the standard is reached or not. Test indexes comprise shaft angle conversion, resolution, output high level, output low level and the like.

The invention provides a flexible circuit board test tool, and relates to the field of circuit detection. The flexible circuit board testing tool comprises a supporting table used for placing a flexible circuit board and a metal contact pin used for being connected with the circuit board, the supporting table comprises two symmetrical rotating plates capable of rotating relatively, and a bonding pad is located at the edge of one rotating plate and the other rotating plate rotates. The flexible circuit board is fixed above the two rotating plates, the rotating plate on one side rotates, the flexible circuit board is bent, the telescopic sleeve is jacked up to work, the flexible circuit board where the part, connected with the wire, of the welding seat is located rotates to the horizontal position, and then the welding seat is welded. The cross-shaped sliding table works to drive the metal contact pin to move to the farthest end of a wire corresponding to the detected welding seat, a circuit is switched on by controlling the telescopic sleeve to descend, and circuit detection is carried out through a universal meter. Through the arrangement, bending power-on testing can be carried out on the flexible circuit board, and virtual connection is avoided.

The invention discloses an integrated measuring device for a voltage transformer, and relates to the technical field of electrical equipment measurement. A base is included; a mounting piece is arranged on the base and is used for positioning and mounting to-be-detected equipment; a measuring piece is arranged at the other end of the base, the measuring piece comprises a measuring box, a measuring integrated part is arranged in the measuring box, an electrical butt joint part is arranged on the outer side of the measuring box, and the electrical butt joint part is connected with equipment to be detected through a wire so as to carry out electrical variable detection; a dust removal piece is arranged in the measuring box and is used for removing accumulated dust in the measuring box; a protection part is arranged on the base and below the measuring box and is used for cleaning and protecting the electrical butt joint part, and a shaking part is arranged on the base and is used for controlling the mounting part and the measuring box on the measuring part to shake; electrical variable detection of an electrical product can be completed, and dust removal and maintenance are facilitated.

Disclosed in the present disclosure is a multi-functional network tester, including a central control module, a power module, and one or more of a network cable length measurement module, a line-finding module, a switch detection module, and a network cable line-alignment module, in which the multi-functional network tester further includes an optical power module or a multimeter module, the network cable length measurement module, the line-finding module, the switch detection module and / or the network cable line-alignment module are connected to the central control module respectively, the optical power module or the multimeter module is connected to the central control module, and the power module is used for power supply.

The invention discloses an isolation device interface test system and test method. The test system comprises a control platform used for generating a corresponding control signal according to a currently selected test item; the test equipment is used for simulating the aerial carrier platform according to the control signal and generating a corresponding test signal; and the test adapter plate is used for transferring a test signal to a port corresponding to the isolation device interface, and returning return data fed back by the port to the control platform through the test equipment, so that the control platform can generate a test result according to the return data. According to the invention, the test equipment can be built by adopting test equipment with lower cost, and compared with an expensive aerial carrier platform, the test cost is greatly reduced; the control platform can perform analysis, measurement and calculation and generate the test result according to the return data fed back by the tested port, manual test is not needed, the test efficiency can be obviously improved, and test errors caused by manual operation are reduced or even avoided.

The utility model provides a multi-electrical-quantity data acquisition device based on a universal meter card, and relates to the field of electrical quantity data acquisition, and the device comprises an input module which comprises a plurality of signal input channels; the switching matrix module is connected with the input module; the universal meter card is connected with the switching matrix module; the embedded computer is connected with the universal meter card; the switching control module is respectively connected with the switching matrix module and the embedded computer; wherein the embedded computer generates and sends a control instruction, the switching control module receives and decodes the control instruction to generate a control word, the switching matrix module performs multi-selection on multiple paths of input signals in the input module according to the control word and sends a selected signal to the universal meter card, and the universal meter card measures the selected signal. And the measurement result is transmitted back to the embedded computer, so that the technical problems of high cost, large size and inconvenience in carrying of the whole device due to multiple signal types and multiple channels of the existing data acquisition device are solved.

The invention belongs to the technical field of power generation engineering, particularly relates to an automatic test tool applied to a circuit breaker and a miniature circuit breaker, and aims to solve the problems of easy measurement error and low detection efficiency of manual detection, and provides the following scheme: the automatic test tool comprises a conveying rack, and conveying rollers which are symmetrical to each other and are equal in height are respectively fixed at two ends of the conveying rack; the same tooth conveying belt is wound between the circumferential outer walls of the two conveying rollers, and circuit breaker fixing modules which are distributed at equal intervals are fixed to the working face of the tooth conveying belt and used for fixing a circuit breaker body to be detected. When the circuit breaker body needs to be tested, only the fixed circuit breaker body needs to be moved between the two touch test modules, and then the two touch test modules are controlled to move towards the middle at the same time until the contact modules touch the wiring terminals of the circuit breaker body. At the moment, the on-off condition of the circuit breaker body can be known according to the voltage difference display of each pole.

The utility model relates to the technical field of electric power detection, and discloses a portable electric power back splint, which comprises a back splint body, a fixing mechanism is arranged on the rear side of the back splint body, a handheld mechanism is arranged on the rear side of the fixing mechanism, the handheld mechanism comprises a limiting block, the limiting block is arranged in the fixing mechanism, and the limiting block is arranged in the fixing mechanism. The back splint comprises a back splint body, a limiting block is arranged on the back splint body, a connecting frame is fixedly connected to the rear side of the limiting block, a fixing sleeve is fixedly connected to the rear side of the connecting frame, and a sponge body is fixedly connected to the bottom in the fixing sleeve. By means of the technical scheme, the back splint can be carried more conveniently, meanwhile, accidents possibly caused by holding the back splint body by hand can be reduced, the stability of the back splint is guaranteed, meanwhile, the back splint body is arranged on an arm in a sleeving mode so that immediate measurement and reading can be achieved, extra hand actions are not needed, and therefore work continuity and efficiency can be improved.

The utility model discloses an electrical instrument with a protection structure, which relates to the technical field of electrical instruments and comprises a universal meter with a shell body and a protection assembly. The protection assembly comprises a protection unit, a rotating and overturning unit and a supporting unit. The protection unit is matched with the protruding edge to achieve scratch-proof protection of the front end of the shell body. The rotating and overturning unit is used for achieving the effects that the protection unit is opened in a rotating mode and connected with the rear end of the shell body in a sleeving mode. According to the utility model, through the arrangement of the protection assembly, the front end of the shell main body is sleeved with the protection cover, so that the front end of the shell main body can be protected, the situation that an external object is in contact with a display screen at the front end of the shell main body and scratches the display screen is effectively avoided, and meanwhile, the protection cover can be sleeved with the rear end of the shell main body through horizontal rotation and vertical overturning; therefore, the front end of the shell main body is exposed to facilitate measurement operation, and the protective cover does not interfere with the use of the universal meter.

A device for testing a voltage level in an electrical terminal cavity including a testing body and a probe for contacting the electrical terminal cavity. The probe includes a tip portion having a first cross-sectional area, a base portion having a second cross-sectional area, and an intermediate portion extending from the tip portion to the base portion having a third cross-sectional area. The first cross-sectional area is smaller than the third cross-sectional area, the third cross-sectional area is smaller than the second cross-sectional area, and the intermediate portion is concentric with the tip portion and the base portion. An axis extends between a center of the tip portion, a center of the intermediate portion, a center of the base portion, and a center of the testing body. The device also includes a circuit operatively coupled with the probe to sense the voltage level in the electrical terminal cavity.

The invention relates to the technical field of universal meters, and provides an automatic power-on and power-off universal meter and a control method thereof, and the automatic power-on and power-off universal meter comprises a handheld state detection unit which is used for detecting whether a user holds a meter pen of the universal meter or not and generating a corresponding state signal; the measuring unit is used for measuring a resistance value and / or a voltage value of a meter pen contact point; the control unit is used for controlling the multimeter to be switched to a power-on state when the state signal indicates that the meter pen is held by hand; if the effective resistance value or the effective voltage value detected by the measuring unit is received, the power-on state is maintained; and if the state signal indicates that the meter pen is not held by the hand, and the received resistance value detected by the measuring unit is infinite and the voltage value is smaller than a preset voltage threshold value, the multimeter is controlled to be switched to a power-off state. On the premise that a physical key is cancelled, user intention detection is achieved, and quick and reliable response can be ensured.

The invention provides an equipment testing system and method and electronic equipment, relates to the technical field of electronics, and can quickly realize input testing of the equipment. The system comprises a control terminal, power supply equipment and an intelligent digital power meter, the control terminal is in communication connection with the power supply equipment and the intelligent digital power meter; the control terminal is used for generating a test list based on input information and sending the test list to the power supply equipment, and the input information at least comprises rated voltage, rated frequency and voltage tolerance of the tested equipment; the test list records test voltage and test frequency corresponding to at least one test item of the tested equipment; the power supply equipment is used for supplying power to the tested equipment according to the test voltage and the test frequency corresponding to each test item; and the intelligent digital power meter is connected between the power supply equipment and the tested equipment and is used for determining an input test result of the tested equipment corresponding to each test item and uploading the input test result to the control terminal.

The utility model relates to the field of cables, in particular to a wire skin insulation layer detection device which comprises a fixing seat, a winder, a cooling box, a detector, a first detection line and a second detection line, grooves are formed in the two ends of the top of the fixing seat, the two ends of the winder are installed in the grooves, the winder is rotationally connected with the fixing seat, and the first detection line and the second detection line are arranged in the grooves. A locking plate is installed on the top of the fixing base, the cooling box is arranged on one side of the fixing base, one end of a first detection line of the detector is connected with the locking plate, the other end of a second detection line of the detector is placed in the cooling box, and the other ends of the first detection line and the second detection line are connected with the detector. The detection equipment is simple in structure and can quickly, accurately and efficiently detect the damage of the insulating layer of the wire skin.

The invention relates to an electronic device (10) adapted for detecting at least one overvoltage or overcurrent on at least one control line of an electrical machine comprising at least two sensors (1000, 1100, 1200) respectively coupled to at least two separate control lines, a microcontroller (100) adapted to receive an electrical signal on a first input terminal (110), each sensor (1000, 1100, 1200) being adapted to detect the occurrence of an overvoltage or overcurrent on the control line to which it is coupled, and to generate an electrical signal on a sensor output (1001, 1101, 1201) representative of said overvoltage, the electronic device (10) is on the one hand respectively coupled to each sensor (1000, 1100, 1200) and on the other hand coupled to the input terminal (110). Figure for abstract: Figure 1

The utility model provides a test tool used for a heating wire finished product, comprising a megohmmeter, the lower side of the megohmmeter is provided with a support box plugged with the megohmmeter, two parallel side surfaces of the support box are respectively provided with an insulating plate used for supporting the heating wire finished product, and the insulating plates are arranged on the two parallel side surfaces of the support box. The sides, close to the supporting box, of the upper surfaces of the two insulating plates are each provided with a vertically-arranged conductive column used for pressing and holding the end of a finished heating wire, the upper surface of each conductive column is sunken downwards to form an insertion groove matched with the pen head of a meter pen, and the side, close to the supporting box, of the outer surface of each conductive column is provided with a supporting lug. The upper surface of the support lug is provided with a guide hole, a guide rod is inserted in the guide hole, the lower end of the guide rod is fixedly connected with the insulating plate, the upper end of the guide rod is provided with a top tray, and a spring in a compressed state is arranged between the top tray and the support lug. And the fatigue feeling of operators can be reduced.

The invention discloses a high-power impedance and current-carrying capacity testing device and method, and relates to the technical field of impedance and current-carrying capacity testing. The device comprises an input protection module, a self-coupling adjustable transformer, a mode switching module, a current boosting transformer, an alternating current and direct current switching module, a sampling module, a signal processing and control module, a system display module and a device control panel. According to the invention, input protection-voltage control-mode switching-voltage adjustment-AC / DC conversion-parameter measurement and control are taken as the core work flow of the test device, and through electrical connection of the modules, safe conversion of an external power supply and stable and accurate adjustment and output of test voltage and current are realized. The device has the functions of impedance testing and current-carrying capability testing.

The utility model discloses an inductance coil portable detection tool, which comprises a fixed seat and a clamping seat, the fixed seat and the clamping seat are oppositely arranged, a sliding groove is formed between the fixed seat and the clamping seat, a clamp used for clamping and fixing an external inductance coil is fixed on the clamping seat, and the clamping end of the clamp is arranged towards the direction of the fixed seat. The fixed seat is provided with a universal meter used for detecting each performance of the inductance coil, the universal meter comprises two detection heads used for being in contact with the inductance coil, and the fixed seat is provided with a fixed part used for fixing the two detection heads and a driving part used for driving the fixed part to horizontally slide in the sliding groove; the fixing base is provided with two contact terminals used for being matched with an external inductance coil to form a loop after the clamping base slides towards the fixing base by a certain distance, and the two contact terminals are each provided with a conductive wire used for being communicated with an external circuit. According to the utility model, the problems in the prior art that the detection of the small inductance coil is tedious and the detection efficiency is not high are solved.

The invention relates to a full-automatic power supply calibration method based on an automatic production line, and belongs to the technical field of lithium battery detection, and the method comprises the following steps: S1, a system generates a calibration task; s2, a stacking machine is fed into a tool; s3, the DCS receives the calibration request; s4, a press machine pressing signal is sent; s5, automatically writing a calibration channel gear parameter; s6, checking tool and multimeter network communication; s7, starting a calibration process; s8, generating a calibration report; and S9, the DCS controls the press to bounce off, and the stacking machine takes out the tool. According to the full-automatic power supply calibration method based on the automatic production line, the lithium battery is detected and calibrated by adopting the calibration method, an operator can be effectively prevented from being in direct contact with a tool, the problem of potential safety hazards such as electric shock when the operator operates the tool can be effectively avoided, and meanwhile, the problem that the lithium battery is damaged before calibration is solved. The problem that the communication line needs to be switched manually is solved by using the command of switching the port.