110results about "Multi-tester circuits" patented technology

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 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.

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 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.

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 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 belongs to the technical field of voltage detection, and particularly relates to an inverter output voltage detection device which comprises a container. A plurality of groups of sliding rods are fixedly connected to the inner side wall of the container; a top plate is fixedly connected to the top ends of the sliding rods; a plurality of groups of springs are fixedly connected to the inner side wall of the container; the sliding rod and the spring are correspondingly arranged; the side wall of the container is fixedly connected with a first adhesive tape; the side wall of the container is fixedly connected with a second adhesive tape; the top end of the first adhesive tape is fixedly connected with a buckle; a plurality of groups of round holes are formed in the top end of the second adhesive tape; a universal meter is arranged at the top end of the container; the top end of the universal meter is connected with a detection head. Through the above structure, the universal meter can be fixed on the arm, and the two hands can operate the detection head to contact the positive and negative electrodes of the inverter, thereby facilitating detection, reducing the falling of the universal meter caused by shaking, increasing the convenience of operating the detection head by the two hands, and better controlling the contact between the detection head and the positive and negative electrodes of the inverter.

The utility model relates to the field of universal meters, in particular to a portable universal meter. The utility model aims to provide the portable universal meter which can accommodate the meter pen and the connecting wire in the meter body and is convenient to carry, place and use integrally. A portable universal meter comprises a meter body, wrapping posts, plugs, telescopic wires, connecting wires and the like, storage openings are formed in the upper sides of the left portion and the right portion of the meter body, a plurality of connecting openings are formed in the upper side of the front portion of the meter body, mounting holes are formed in the front side of the meter body in a bilateral symmetry mode, the wrapping posts are connected to the left side and the right side of the lower portion of the meter body, and the plugs are clamped in the mounting holes. The plug is connected with a telescopic line, and connecting lines are wound between the wrapping posts on the left side and the right side. According to the universal meter, the connecting wire is wound between the winding columns, and the meter pen is fixed through the locking cover, so that the meter pen and the connecting wire can be accommodated in the meter body, and the universal meter is convenient to carry, place and use integrally.

The utility model discloses a universal meter line patrol instrument circuit, which comprises a universal meter circuit and a line patrol instrument circuit, and the universal meter circuit and the line patrol instrument circuit are integrated in the same physical measurement device. The universal meter circuit and the line patrol instrument circuit are integrated on the same physical hardware, but are completely independent, an independent power supply and an independent power switch are adopted, the requirement that a user has multiple testing functions by adopting one physical device is met, and carrying is convenient. Meanwhile, power supplies and power switches of the universal meter circuit and the line patrol instrument circuit are independent, so that measurement errors caused by electromagnetic interference are thoroughly avoided, and the requirements of creepage distance and safety regulation are met.

The utility model discloses a millimeter wave test system, which relates to the technical field of microwaves and millimeter waves and comprises a signal generator module, a spectrum analysis module, a network analysis module, a power measurement module, an antenna test module, a signal processing module, a control and data processing module, a test fixture and an adapter. According to the utility model, a plurality of test functions are integrated, so that the complexity of the system is reduced, and the test efficiency is improved; according to the utility model, advanced signal processing and calibration technologies are adopted, so that the accuracy of a test result is ensured; multiple test modes and interface types are supported, and diversified test requirements are met; automatic testing is achieved through control, and personal errors are reduced.

A test and measurement probe system, including an input to receive an input signal, the input signal including a low frequency (LF) and / or direct current (DC) component and an alternating current (AC) component, an extractor circuit, such as an AC coupling circuit or a LF and / or DC rejection circuit, configured to receive the input signal and to separate the AC component and the LF and / or DC component from the input signal, a first output to output the alternating current component to the test and measurement instrument, and a second output to output the direct current component to the test and measurement instrument. In some embodiments, the LF and / or DC component is digitized prior to being output by the second output.

The application belongs to the technical field of current measuring equipment, and particularly relates to an invasive current measuring device, which comprises an input sampling measuring module, a front-stage protection and sampling switch module and a rear-stage protection and sampling switch module. The input sampling measuring module comprises an input port, a sampling circuit, a signal output circuit, a first node and a second node. The front-stage protection and sampling switch module comprises a first-stage switch circuit, an input current monitoring circuit and a third node. The rear-stage protection and sampling switch module comprises a second-stage switch circuit. The application adopts single gear measurement and common input ports through the input sampling measuring module, the front-stage protection and sampling switch module and the rear-stage protection and sampling switch module, so as to effectively simplify the mechanical structure and the circuit structure of the multimeter. In addition, through the cooperation of the plurality of second-stage switch circuits and the sampling circuit, a plurality of ranges are flexibly realized, and a larger measurement range and higher resolution are further realized.

The invention discloses a control circuit of a permanent magnet synchronous motor and an identification method thereof, a pulse generation circuit provides a first driving signal, a comparison circuit compares a first current with a first reference current, and outputs a first level when the first current is greater than or equal to the first reference current; the pulse capture circuit acquires the first time of the first driving signal, and the conversion circuit acquires the first voltage of the bus of the inverter circuit; the pulse generation circuit provides a second driving signal, the comparison circuit compares the first current with a second reference current, and outputs a first level when the first current is greater than or equal to the second reference current and the pulse capture circuit obtains a second time of the second driving signal, and the conversion circuit collects a second voltage of the bus of the inverter circuit; the processor obtains the first inductance and the first resistance according to the first voltage, the second voltage, the first reference current, the second reference current, the first time and the second time. The detection time can be shortened, and the detection efficiency is improved.

The invention relates to the technical field of detectors, and provides an automatic detection function identification method of a circuit detector, the circuit detector and a storage medium, the circuit detector comprises an input end, a processing module and at least one bias power supply module arranged between the input end and the processing module; the method comprises the following steps: if a processing module detects that a voltage exists at an input end, judging that a current working mode is a voltage detection mode; if the voltage does not exist, any bias power supply module or any grounding module is controlled to be switched on; after the bias power supply module is conducted, the current working mode is judged according to whether the input end has voltage or not and whether the voltage changes or not. At least one bias power supply module is arranged between the input port of the circuit detector and the processing module, so that a detection function can be automatically identified and executed without setting a function button, and a measurement result is further obtained.

The utility model provides an AC test power supply system, and belongs to the field of test power supplies. Comprising an EMC unit, a three-phase PFC unit, three DC / DC isolation units, three inversion units, a second control unit and a second signal acquisition unit. The output end of the EMC unit is connected to the three-phase PFC unit, the output end of the three-phase PFC unit is connected to the three DC / DC isolation units, the output ends of the three DC / DC isolation units are connected to the three inversion units, and output N pins of the three inversion units are connected in parallel; and the second signal acquisition unit is connected with the second control unit and the three inversion units. The utility model has the advantages of comprehensive function, high efficiency, high voltage precision, flexible power expansion and low AC output harmonic content.

An elongate sensor, system and method for detecting moisture and / or corrosion. The elongate sensor can include multiple conductors located alongside one another, or parallel with each other, not contacting each other and not making direct electrical contact between one another. Each conductor has a distinct pattern of alternating insulated and non-insulated portions. In each insulated portion, the Nth conductor is within an electrically non-conducting material forming Nth non-detecting portions. In each non-insulated portion, the Nth conductor is exposed or not electrically insulated forming Nth detecting portions. Each of the Nth detecting or non-detecting portions would have a single Nth unit length. Each Nth unit length is a distance equal to two to the power of N minus one first unit lengths, 2(N−1) times the first unit length. Electrically conductive object provides a base conductor and / or the elongate sensor includes a base conductor.

A current generating device produces an AC or DC current of a known value to check that a current meter is operating correctly. The device comprises a battery and two terminal sockets 6 for providing

The invention discloses an electric power instrument testing device which comprises a testing instrument, a measuring head piece and a contact pin head, wherein the measuring head piece and the contact pin head are electrically connected with the measuring head end of the testing instrument. The measuring head piece comprises an insulating sleeve head, a clamping part and a shaft rod which is rotatably mounted on the inner side of the insulating sleeve head, a static chuck and a movable chuck are arranged in the clamping part, through a thread and a spiral groove structure on the surface of the shaft rod, rapid adjustment of the clamping distance is realized under driving of an external shifting ring, and the measuring head piece is used for stably and rigidly clamping structures such as cable ends, tabs or copper bars. The contact head is electrically connected with the measuring head piece, and the surface of the contact head is provided with a gap clamping groove, a wire clamping hole and a meshing groove, so that elastic clamping or hanging of a contact, a wire and a needle-shaped electrode can be realized. Through the combined arrangement of the elastic contact pin and the adjustable rigid clamping structure, the test contact pin can adapt to test contacts of various shapes and specifications, the problems that a traditional contact pin is difficult to maintain and an alligator clip is easy to fall off are avoided, the stability and operation convenience of test connection are improved, and the test contact pin is suitable for complex power test working conditions.

The utility model relates to the technical field of electricity measuring equipment, in particular to an electrical and electronic electricity measuring device. Comprising an electricity measuring meter body and a test pencil. The storage back shell is installed on the back of the electricity measuring meter body, the take-up structure is arranged in the storage back shell, the take-up structure comprises a storage control rod slidably connected in the storage back shell, a storage fixing rod is fixedly installed at the bottom of the storage back shell, an elastic assembly is installed on the storage back shell, and a clamping groove is formed in the bottom of the storage back shell; a storage groove for storing the test pencil is formed in the storage back shell; the universal meter test pencil effectively solves the problem that when an existing universal meter test pencil is used, a wire is prone to winding and knotting, and use is inconvenient. The multifunctional test pencil is easy to use and store, the use efficiency is greatly improved, and the protection effect on the test pencil and a user is greatly improved at the same time.

The invention discloses a load identification method and device based on a quantum measurement technology. The method comprises the steps that multiple quantum signals of a target user bus are acquired through a quantum sensor, and the multiple quantum signals comprise a current quantum signal, a voltage quantum signal and a power factor quantum signal; performing feature extraction on the plurality of quantum signals to obtain quantum feature vectors; the quantum feature vectors are input into a preset load recognition model, multiple load matching probabilities are obtained, and the load recognition model comprises a quantum feature mapping layer, a quantum feature extraction layer and a deep learning classification layer; and based on the plurality of load matching probabilities, a load identification result corresponding to the target user bus is determined, and the load identification result comprises a running load type. According to the method, the technical problems of difficulty in weak feature capture, weak anti-interference capability and slow dynamic response in traditional non-intrusive load identification are solved.

The invention discloses an intelligent Internet of Things three-bit and half-universal meter for a railway train, and belongs to the technical field of electrical measurement equipment, and the design of the intelligent universal meter comprises hardware design and software design. According to the invention, a four-core 64-bit ARM architecture processor RK3568 and a high-precision FS9721 chip are adopted, touch screen interaction is realized by combining an Android system, and automatic gear switching is realized. According to the software design, a communication framework is constructed based on a message queue telemetry transmission (MQTT) protocol, a controllable step length minimum mean square adaptive filtering algorithm and a dynamic temperature compensation algorithm are integrated, and the measurement precision is improved. The innovativeness lies in that an embedded system and the Internet of Things technology are integrated, the problem of data islands of a traditional instrument is solved, and the system can be applied to the fields of industry, power grids, Internet +, test teaching and the like. Test results show that the measurement precision of the device is integrally improved by 30%, and the device has both intelligent and automatic performance. According to the invention, powerful technical support is provided for realizing comprehensive digital debugging.

The application discloses a buried pressure pipeline intelligent detection device. The application comprises an overall test detection device, a data acquisition circuit and a later data transmission storage processing. The intelligent detection system generates a detection excitation signal under the command of periodical detection or remote detection, and an automatic measurement auxiliary circuit starts to work after receiving the detection excitation signal. A detection pile detects a pipeline to be detected and connects a voltage / current / resistance measurement circuit through a corresponding parameter interface to output the following pipeline information: parameters such as pipe ground potential, open circuit potential, AC / DC current and stray current. The output parameter information is transmitted to a processor through an analog-digital conversion circuit and transmitted to a PC through a wireless data transmission module by using a serial port protocol. Through the application, the measurement error caused by manual operation is reduced, and the problem that the detection result of the pipeline to be detected under complex working conditions is inaccurate in the related art by using a single method is solved.

The invention discloses a detachable hardware type multifunctional electrostatic comprehensive detection device and detection system, and belongs to the technical field of electrostatic detection, the detachable hardware type multifunctional electrostatic comprehensive detection device comprises a host, the host is a handheld device, and the host is provided with a display screen, an entity key area and a code scanning module; a wireless transmission module is integrated in the host and is used for realizing communication connection with a background management system so as to support real-time data uploading and paperless management functions, and the host is compatible with a plurality of hot plug hardware probe modules including a module A, a module B, a module C, a module D and a module E; wherein the module A is a non-contact electrostatic voltage measuring module, the module B is an ion fan balance degree testing module, the module C is a human body walking voltage and electrostatic potential testing module, and the module D is a resistance testing module. The invention provides the comprehensive electrostatic detection equipment which integrates multiple detection functions, has intelligent data management, and can effectively prevent data counterfeiting and reduce the operation cost.