217results about "Multi-tester circuits" patented technology

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 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 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 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 invention discloses a full-parameter automatic test system suitable for a dual three-channel RD converter. The system sets and controls a tested product and a test instrument through computer control software, and realizes automatic test of performance parameters and functions of the to-be-tested dual three-channel RD converter under different temperature conditions according to a full-parameter automatic test process set by the computer control software. And automatically recording the test data and storing the test data to form a test record table. According to the invention, the test efficiency and test coverage of the dual three-channel RD converter can be effectively improved, and the actual result shows that a single converter can complete the test of all parameters within 5 minutes and automatically form a test record. Compared with a traditional manual test, the method has better efficiency and consistency, and is suitable for batch production test of the dual three-channel RD converter.

The invention relates to the technical field of electric power auxiliary tools, in particular to a multimeter convenient to carry and a using method thereof, an elastic wire is connected between a multimeter body and a measuring electroprobe, a plurality of sliding grooves are formed in the outer side of the measuring electroprobe in the circumferential direction, measuring probes are arranged in the sliding grooves in a penetrating mode, and the measuring probes are arranged in the sliding grooves in a penetrating mode. The elastic wire penetrates through the measuring electroprobe and is fixedly connected with the measuring probe, and a control button is fixed to the end, close to the elastic wire, of the measuring probe. According to the universal meter, the measuring electroprobe is placed in the measuring electroprobe placing groove, the portability is enhanced, the measuring electroprobe is provided with the sliding groove and the adjustable measuring probes, the control button and the clamping groove are matched, the measuring flexibility and precision are improved, the searchlight at the point of the measuring electroprobe has an additional function, and the universal meter body is provided with the adjustable supporting legs, so that the universal meter is convenient to use. And the user experience is optimized.

A kit for monitoring an oil-immersed or oil-filled transformer 4 comprises: a communication device 1 and at least three sensors 3 to determine different characteristics of the transformer. The sensors are connected to the communication device using cables and the communication device forwards measured sensor data to a remote database 5. The sensors may measure temperature, humidity, gas content, partial discharge, pressure, liquid level, power, frequency, phase angle, harmonics, impedance, insulation or grounding resistance, earth fault current, arcs, overload or short circuit. Top oil temperature, bottom oil temperature, ambient temperature and winding current may particularly be measured. The kit may be installed to upgrade or service an existing transformer. The measured data may be encrypted before transmission or a certificate may be used to authorize communication. The kits may be used to monitor a fleet of installed transformers remotely.

The utility model discloses a self-adaptive frequency measurement circuit and a universal meter. The circuit comprises a first protection module, a second protection module, a voltage division module, a selection module, a voltage measurement module, a frequency measurement module and a control module. The first protection module is electrically connected with the voltage input end, the voltage dividing module, the second protection module and the selection module. The voltage division module is also electrically connected with the selection module and the voltage measurement module; the second protection module is also electrically connected with the frequency measurement module and the common end; the selection module is also electrically connected with the control module and the frequency measurement module; the voltage measuring module is also electrically connected with the control module; and the frequency measurement module is also electrically connected with the common end and the control module. The input voltage is compared with the specified threshold value, when the voltage is large, the input voltage is divided, unreliable measurement results caused by too high voltage are prevented, when the voltage is small, the voltage division circuit is disconnected, frequency measurement is directly carried out, and the accuracy of low-voltage frequency measurement is guaranteed.

The invention discloses a multimeter pen device capable of switching positive and negative electrodes and a multimeter device, and relates to the technical field of circuit detection, and the multimeter pen device comprises a positive electrode pen, a negative electrode pen, a switching circuit and a change-over switch. Wherein the switching circuit comprises a first output end and a second output end; the positive meter pen is conducted with the first output end through the switching circuit; the negative electrode meter pen is conducted with the second output end through the switching circuit; the change-over switch is used for controlling the switching circuit, and when the change-over switch is triggered, the positive electrode meter pen is switched to be conducted with the second output end, and the negative electrode meter pen is switched to be conducted with the first output end. According to the universal meter, the positive electrode and the negative electrode of the two meter pens can be switched through the switching circuit, and the problem that the pens are frequently replaced when the universal meter is used can be avoided.

The utility model relates to the technical field of electric automobiles, in particular to automobile electric power detection equipment, which solves the problem that the detection process of an automobile storage battery is troublesome, and comprises a base, a primary transverse pushing seat and a secondary transverse pushing seat, and the upper side of the front end of the base is higher than the upper side of the rear end of the base. The middle end of the first-stage transverse pushing seat movably penetrates through the lower end of the base back and forth, a first spring is fixed between the front end of the first-stage transverse pushing seat and the front end of the base, and the upper half part of the rear end of the first-stage transverse pushing seat protrudes forwards to form an abutting head frame. And the two power connection plates can be directly and transversely inserted into the positive electrode and the negative electrode of the storage battery and can be always inserted into the positive electrode plug and the negative electrode plug of the universal meter, so that the plug of the universal meter can be electrically connected with the positive electrode and the negative electrode of the storage battery without frequently opening the positive electrode plug and the negative electrode plug of the universal meter, and the use is convenient and stable.

The utility model discloses an anti-drop digital multimeter, and belongs to the technical field of digital multimeters. According to the anti-falling digital multimeter, a double-layer shell structure, a display screen protection design, a circuit board fixing design and anti-falling measures are adopted, so that the anti-falling performance of the digital multimeter can be effectively improved, and the damage to the digital multimeter during falling is reduced. When the digital multimeter falls accidentally, the tension spring and the spring can buffer the impact force caused by falling, so that the impact force on the display screen and the circuit board is reduced, and the internal parts of the multimeter can be effectively protected from being damaged. The anti-falling digital multimeter has good anti-falling performance, so that the damage of the digital multimeter in the use process can be reduced, the service life of the digital multimeter is prolonged, and the anti-falling digital multimeter has the effects of improving the anti-falling performance and prolonging the service life.

The utility model discloses a power equipment fault detection and troubleshooting device. The device comprises a multimeter; the detection pen is composed of a handle and a detection needle, a wire clamping opening is formed in the end portion of the detection needle, and a wire clamping assembly used for clamping the detection needle and an electric wire of the electrical equipment is installed at the end, close to the wire outlet, of the interior of the detection needle. According to the utility model, an electric wire is arranged at the wire clamping port of the detection needle, and then the rotating handle is rotated, so that the cam connected to the outer side of the rotating shaft extrudes the stand column to move towards the inside of the detection needle, and at the moment, the sliding rod enables the pressing plate to move inwards at the wire clamping port of the detection needle under the cooperation of the positioning frame and the limiting column, so that the electric wire and the detection needle are locked conveniently; in this way, the problem that the detection needle is separated from the wire due to shaking in the troubleshooting process of the power equipment can be avoided, the stability during detection is improved through the structure, and meanwhile the troubleshooting efficiency of power equipment fault detection is greatly improved.

An overcurrent monitoring method which can be implemented by computer program instructions executed by one or more hardware processors. In some embodiments, the method can include providing in a semiconductor device tester a device under test, controlling testing signals to the device under test by operation of an electromechanical switch electrically coupled to the device under test, monitoring for an overcurrent condition in the electromechanical switch by directly measuring a testing signal from the electromechanical switch during the operation thereof using a current measurement sensor directly serially connected to the electromechanical switch and determining whether the overcurrent condition has been detected using a detection circuitry electrically coupled to the current measurement sensor. The method can make use of monitoring circuitry to generate excess current signals.

The utility model provides an electronic connector automatic test fixture, relates to the electronic connector test technical field, and comprises a test box, the inner wall of the test box is provided with a T rail groove, and the inner wall of the T rail groove is slidingly connected with a T rail member. In the prior art, a worker needs to use a universal meter to further test the connectivity of the pins, the method is tedious and time-consuming, the accuracy and consistency of the test are difficult to guarantee due to the fact that contacts need to be continuously replaced through manual operation and good contact is guaranteed each time, and errors caused by human factors are very common in actual work. An operator cannot enable a contact to be in complete contact with a pin due to negligence or fatigue, or a connector or a universal meter is moved carelessly in the testing process, so that reading is inaccurate and even some hidden short circuit problems are missed, and the original short circuit problem is omitted due to the factors. And the quality and the yield of the product are further influenced.

The invention discloses a head-replaceable screwdriver integrated with the function of a universal meter, and relates to the technical field of electrician tools, the head-replaceable screwdriver comprises a handle part, a main control circuit board, a rechargeable lithium battery and a Bluetooth device are arranged in the handle part, the surface of the handle part is provided with a display screen and a rotary range selection switch, the end part of the handle part is provided with a connector used for inserting a test wire, and the end part of the handle part is provided with a universal meter; the rechargeable lithium battery, the Bluetooth device, the display screen and the rotary range selection switch are all connected with the main control circuit board, and the rechargeable lithium battery is used for providing stable direct current power supply; a bit; the connecting part is a hollow sleeve with a conductive function, the connecting part is embedded in one end of the handle part, a spring ejector pin mechanism is arranged in the connecting part, the screwdriver head is inserted into the open end of the hollow sleeve, and the tail of the screwdriver head is in contact with the spring ejector pin mechanism so as to conduct electric signals of the screwdriver head and the main control circuit board. The device can solve the problems that a traditional tool is scattered and tedious in operation.

The invention relates to a DC bus short-circuit current level calculation method, device and equipment of a multi-terminal flexible DC back-to-back system. The method comprises the following steps: acquiring system data, electrical quantity data and parameter data; valve side system short-circuit impedance, first valve side short-circuit impedance and first impedance data are obtained through calculation according to the system data, the parameter data and the electrical quantity data; obtaining a first manufacturing deviation and a second manufacturing deviation, and updating the first valve side short-circuit impedance according to the first manufacturing deviation to obtain a second valve side short-circuit impedance; updating the first impedance data according to the second manufacturing deviation to obtain second impedance data; calculating according to the system data, the parameter data, the valve side system short-circuit impedance, the second valve side short-circuit impedance and the second impedance data to obtain an AC short-circuit current component; calculating a discharge current according to the endurance capacity type and the electrical quantity data; calculating short-circuit current according to the discharge current and the alternating-current short-circuit current component; and calculating the short-circuit current level according to the short-circuit current.

The invention relates to the technical field of detection equipment, in particular to a safety detection device for weak current engineering, which comprises a storage unit and a carding unit, and the storage unit is fixedly arranged in a detector. The detection line is stored through the storage unit, the detection line can be shelled during use and can be stored in the detector through the storage unit after use, the use is convenient and fast, the overall attractiveness of the detector is improved, meanwhile, due to the fact that the detection line is stored in the detector, the knotting and winding problems are avoided, and the detection efficiency is improved. And the end part of the brake shoe slides along the inner wall of the friction deceleration ring in a sliding friction manner, so that the resilience force of the vortex spring cannot quickly drive the spool to reversely rotate and reset, and the detection line is prevented from being broken due to the overhigh rotating speed of the spool.

Electrical testing methods, systems, and kits are capable of powering, via a first power supply, an electrical system, performing, via a first electrical device, selective detection of at least two parameters of the electrical system, and detecting, via sensor(s) of a second electrical device, presence and / or flow of a parameter from a second power supply to the electrical system to derive parasitic draw of the electrical system. Memory settings of the electrical system are preserved via the second electrical device while the parasitic draw is derived. User input(s) selecting an electrical element of the electrical system are received via a third electrical device that stores impedance data of electrical elements. The third electrical device determines voltage drop across an electrical path passing through the electrical element, which the third electrical device uses to determine, in combination with the impedance identified by the impedance data, amperage of the electrical element.

The utility model discloses a universal meter pen buckle convenient for single-person measurement, which belongs to the technical field of universal meter pen measurement and comprises a clamping ring assembly and a distance adjusting assembly. The clamping ring assembly is detachably and fixedly connected with the two meter pens. The distance adjusting assembly is used for adjusting the distance between the two meter pens. The clamping ring assembly and the distance adjusting assembly both have an insulation effect. The universal meter pen buckle facilitating single-person measurement can effectively solve the problem that in the prior art, when two meter pens are operated by one hand, the front ends of the two meter pens are prone to short circuit, and negative effects are caused; and reading by a universal meter is not convenient when the universal meter is operated by two hands.

The present invention relates to a printed circuit board device enabling the measurement of at least one electrical quantity, said device comprising a printed circuit board (1), referred to as motherboard (1), having a face, referred to as main face (1a), a measuring device enabling the measurement of at least one electrical quantity and the generation of measurement signals and at least one current-conducting track (3) for measurement.It is characterized in that it further comprises an additional printed circuit board, called daughterboard (2), having two opposite faces and being connected directly to the main face (1a) of the motherboard (1) by being held substantially perpendicular to the motherboard (1), in that the conductive track or each conductive track (3) comprises a main part (30, 30') extending over the main face (1a) of the motherboard (1) and a transition part extending over the two faces (20, 20') of the daughterboard (2) by passing through it, the main part (30, 30') comprising two main segments (30, 30') on either side of the daughterboard (2), each connected, by a conductive link (8), to the transition part of said conductive track (3) and in that the measuring device is implanted on the daughterboard (2) by being connected to the or one of the conductive transition parts.

The utility model discloses an electric power detection instrument, belongs to the technical field of electric power detection instruments, and aims to solve the problems that a mechanism for protecting a pen point is lacked, the pen point is exposed outside after a universal meter is used, the pen point is easy to collide and damage with other objects, and an operator is easy to puncture. Comprising a body, the body is provided with multiple groups of uniformly distributed interfaces, the interfaces are movably connected with meter pens, the other ends of the meter pens are provided with insulating columns, the lower parts of the insulating columns are connected with pen points, the external side surfaces of the insulating columns are provided with jacks, and the body is internally provided with a limiting assembly. According to the electric power detection instrument, through the arrangement of the limiting assembly, the insertion hole and the round hole, the function of protecting the pen point is achieved, so that the pen point is prevented from being exposed after the universal meter is used, the pen point of the universal meter is prevented from colliding with other objects, the pen point of the universal meter is prevented from being damaged, and the service life of the universal meter is prolonged; meanwhile, the pen point of the universal meter is prevented from puncturing an operator, and the use safety of the universal meter is improved.

The utility model discloses a motor calibration device for intelligent doors and windows, and belongs to the technical field of door and window processing. The universal meter comprises a universal meter body and a limiting part, the top of the universal meter body is provided with a rectangular block, the limiting part is provided with a stop block and a rotating shaft, the stop block is provided with a through hole, the rotating shaft is sleeved in the through hole, the top of the rectangular block is provided with a through hole matched with the rotating shaft, the end part of the rotating shaft is sleeved with a torsion spring, the rectangular block is provided with a circular groove, and the circular groove is communicated with the through hole. According to the utility model, the plug is limited through the baffle block and the torsion spring, and the spring drives the baffle plate, so that a reliable limiting effect is provided for the plug, external force interferences such as vibration, collision, human touch and the like which may occur in the working process can be resisted, and the plug is ensured to be stably inserted on the universal meter all the time; the problem of measurement signal interruption caused by loosening of the plug is avoided, and the continuity and stability of measurement work are ensured.

The utility model relates to the technical field of weak current detectors, in particular to a combined weak current detector which comprises a weak current detector body, a first connector and a first mounting block are mounted on the surface of the bottom of the weak current detector body, and a quick release assembly is mounted on the surface of one side of the first mounting block. A hinge is mounted on the surface of one side of the top of the weak current detector body, a rear cover is mounted on the surface of one side of the hinge, a second mounting block is mounted on the surface of one side of the rear cover, and a first placement groove, a first wire groove, a second placement groove, a second wire groove and a third placement groove are sequentially formed in the inner wall of the weak current detector body from top to bottom; the inner wall of the weak current detector body is provided with a storage assembly. According to the improved weak current detector, the combined design is adopted, the components can be quickly disassembled and assembled, maintenance is convenient, the design convenient to store is adopted, the detection pen, the wire and the second connector can be effectively stored, the wire is prevented from being wound, and the working efficiency is prevented from being influenced.

The utility model provides an electric leakage detection device for a new energy automobile battery, and relates to the technical field of new energy automobiles, the electric leakage detection device comprises a detection box, the top of the inner side of the detection box is fixedly connected with a fixed shell, the bottom of the fixed shell is provided with a limiting groove, and the fixed shell is internally and rotatably connected with a bidirectional threaded rod; the outer surface of the two-way threaded rod is sleeved with a movable plate. According to the utility model, the battery to be detected is placed in the detection box and is located between the two clamping plates, the negative electrode of the battery is in contact with the metal sheet, then the bidirectional threaded rod is rotated, and the two moving plates are limited by the limiting grooves, so that the bidirectional threaded rod drives the two moving plates to move relatively, and the two moving plates drive the two clamping plates to move relatively; and then one end of the meter pen is in contact with the positive electrode of the battery, the multimeter can be read at the moment, whether the battery leaks electricity or not can be detected, the operation is convenient, and the working efficiency is improved.

The utility model relates to the field of detection devices, in particular to a detection device for equipment maintenance, which comprises a base, a workbench, a universal meter, test pencils, a guide rod, a sliding rod, a positioning rod, a spring and a clamping seat, the workbench is hinged to the top of the base, the universal meter is mounted on the rear side of the top of the workbench, and the test pencils extending outwards are connected to the two sides of the upper portion of the universal meter respectively. Guide rods are arranged on the two sides, close to the edge, of the top of the workbench, sliding rods are arranged on the guide rods in a sliding mode, positioning rods are inserted into the sliding parts of the sliding rods and the guide rods, the ends of the positioning rods abut against the ends of the guide rods, springs are arranged on the outer sides of the two sliding rods in a surrounding mode, and clamping bases are arranged on the two sliding rods in a sliding mode. By integrating various measuring tools such as a universal meter and a test pencil, the time for frequently replacing the tools is shortened, and the measuring process is simplified; and through the design of the sliding rod, the guide rod and the clamping seat, the position of the clamping seat can be accurately adjusted, and the device to be measured is ensured to be firmly and correctly fixed at the optimal measurement position.

The present invention belongs to the field of measurement and control technology and instrument technology, and specifically relates to a multimeter intelligent module with power-on alarm and self-locking functions. The housing is provided with slots of different sizes, including a limit switch slot for accommodating a limit switch, a battery slot for accommodating a battery, a circuit board slot for accommodating a single-chip microcomputer, etc., a speaker slot for accommodating a speaker, a test lead jack connected to a multimeter jack, and a multimeter slot for accommodating a multimeter body. The housing is also designed with a knob and a baffle, the knob fits with the multimeter knob, and the baffle is connected to the multimeter slot cavity to fix the multimeter; the single-chip microcomputer is respectively connected to an A / D conversion chip, a voice broadcast module, a limit switch, an indicator light, and a driver chip; the A / D conversion chip is connected to a linear regulator, the voice broadcast module is connected to a speaker, and the driver chip is connected to a relay. The present invention can avoid safety accidents caused by the test lead position not matching the selected gear, and can avoid safety hazards caused by human error.

A measurement device is disclosed, which may include or wirelessly connected to sensors or sensing devices for sensing an electrical property. The measurement device can receive user input, e.g., from physical UI components, to set a reference range of values and measures the electrical property of a device under test. Under a limit gauge operation mode, if the measured value is outside the reference range, the measurement device can produce an alert to notify its users.