1133 results about "Shunt Device" patented technology

Described embodiments include apparatus (28) that includes a shunt (26). The shunt includes a flared distal portion (40), a flared proximal portion (44), and an intermediate portion (42), disposed between the distal portion and the proximal portion. The apparatus further includes a constricting flexible longitudinal element (38) passing circumferentially along the intermediate portion of the shunt, configured to constrict the intermediate portion of the shunt, and one or more proximal-portion-collapsing flexible longitudinal elements (36) configured to collapse the proximal portion of the shunt. Other embodiments are also described.

The invention discloses an electricity meter terminal temperature anomaly identification method, system and device and a storage medium, and relates to the technical field of intelligent electricity meter monitoring and anomaly detection.The method comprises the steps that currents of a live line loop and a zero line loop of an intelligent electricity meter are sampled, and the deviation rate of the live line current relative to the zero line current is calculated; estimating the temperature of the terminal of the electric energy meter based on the deviation rate and by using the resistance characteristic metering error change trend of the manganese-copper shunt; and when the terminal temperature estimated value of the electric energy meter exceeds a preset threshold value, determining that the temperature of the live wire terminal is abnormal, and recording an alarm event. The method realizes real-time acquisition of current difference characteristics, provides a reliable data basis for subsequent terminal temperature estimation, realizes a method of indirectly reflecting terminal temperature rise through electrical characteristics, ensures that alarm can be triggered and a complete tracing chain can be formed when temperature abnormity occurs, and improves the accuracy of terminal temperature estimation. Therefore, the controllability of the operation safety of the electric energy meter and the completeness of post analysis are improved.

The invention provides a high-resistance coaxial shunt, which comprises an outer conductor, a central shaft conductor and a resistor body, and is characterized in that the outer conductor, the resistor body and the central shaft conductor are of cylindrical structures and are coaxially arranged from outside to inside; the resistor body is of a laminated structure, and the conductive length of the resistor body is larger than the physical length of the resistor body in the laminated state. According to the high-resistance coaxial shunt provided by the invention, the resistor body is arranged to be of the laminated structure, so that the conductive length of the resistor body can be effectively prolonged, and the resistance value is increased under the condition that the conductive area and the physical length of the resistor body are not changed. The invention also provides a current detection system.

A coaxial shunt provided by the present invention comprises an outer conductor, a resistor body, a central shaft conductor and an insulating filler, the outer conductor, the resistor body and the central shaft conductor are all cylindrical structures and are coaxially arranged from outside to inside, an insulating connecting piece is arranged between the outer conductor and the central shaft conductor, and the insulating filler is arranged between the outer conductor and the central shaft conductor. The insulating connecting piece is mechanically connected with the outer conductor and the central shaft conductor at the same time, and / or the central shaft conductor is flexibly and electrically connected with the resistor body. According to the coaxial shunt provided by the invention, the insulation connecting piece and / or the central shaft conductor are / is flexibly and electrically connected with the resistor body, so that the resistor body is ensured to be stable and reliable. The invention also provides a current detection system using the coaxial shunt.

The invention provides a coaxial shunt capable of preventing high-frequency radio frequency leakage, which comprises an outer conductor, a resistor body and a central shaft conductor, the central shaft conductor and the outer conductor are respectively provided with a central shaft conductor signal output end and an outer conductor signal output end, and a low-pass filtering module is arranged in a cylindrical structure of the resistor body. And the low-pass filtering module is electrically connected with the central shaft conductor signal output end and the outer conductor signal output end. According to the coaxial shunt capable of preventing high-frequency and radio-frequency leakage provided by the invention, the low-pass filtering module is arranged between the signal output end of the central shaft conductor and the signal output end of the outer conductor, so that leaked high-frequency and radio-frequency signals can be filtered, and the detection bandwidth of the coaxial shunt capable of preventing high-frequency and radio-frequency leakage is effectively increased; and the space is saved. The invention also provides a current detection system.

The present application provides a shunt device, comprising a shunt member and a flow regulating mechanism. The shunt member comprises a body and an inlet and an outlet located at two ends of the body, and the shunt member defines a shunt passage for pressurized fluid; the flow regulating mechanism is connected to the shunt member, and the flow regulating mechanism is used for regulating the flow of the pressurized fluid flowing through the shunt passage; the flow regulating mechanism comprises a blocking portion having a variable form, and the blocking portion is configured such that when the fluid pressure at the inlet of and / or inside the shunt member is less than the fluid pressure outside the flow regulating mechanism, the blocking portion is driven by the fluid pressure outside the flow regulating mechanism to radially collapse, so that the flow regulating mechanism partially closes the shunt passage.

A fast response time coaxial tube shunt with a single-layer tubular resistor structure is provided. A resistor tube is formed on the outer surface of an insulating tube. An insulating coating is provided on the outer surface of the resistor tube so that the outer conductive tube and the resistor tube can be designed to be as close as possible. When a large pulse current passes through, since the thickness of the resistor tube can be controlled to the μm level, the response time of the coaxial tube shunt can theoretically be in the ps level. At the same time, since the currents passing through the outer conductive tube and the resistor tube are equal in magnitude and opposite in direction, and the distance between the two is extremely close, the residual inductance of the coaxial tube shunt can be made extremely small, which greatly reduces the overshoot phenomenon of pulse current measurement and improves the accuracy of fast rise time pulse current measurement.

The invention discloses an electric meter historical data restoration method based on a multi-dimensional incidence relation, and relates to the technical field of electric power data management and intelligent restoration, the accuracy and traceability of data restoration are realized by establishing a multi-source exception type library and an element time-varying degradation model, and the accuracy and traceability of data restoration are improved for multi-source data conflicts. The method comprises the following steps: pre-defining a plurality of abnormal mode combinations and corresponding repair strategies, positioning a fault source through mode matching of a real-time index and an abnormal type library, selecting reference data in combination with a historical average deviation rate of a target ammeter and an associated ammeter, avoiding deviation caused by single judgment, and for nonlinear degradation, firstly determining fault elements of a shunt and an ADC chip, a resistance degradation model and a conversion error model are constructed, a theoretical correction value is calculated, a result is optimized through a machine learning model trained by historical normal data, meanwhile, original readings, model parameters and calculation bases are stored in an associated mode, a traceable log is formed, and the repair accuracy is guaranteed.

The utility model relates to an integrated shunt excitation device. The integrated shunt excitation device specifically comprises an excitation fuse, a trigger module and a shunt module, the excitation fuse comprises an electronic ignition assembly, a piston and a conductive piece. The diverter module is connected in series in the conductive part to replace the part, needing to be disconnected, of the conductive part, the trigger module is connected with the diverter module and the electronic ignition assembly, and the trigger module starts the electronic ignition assembly according to a received current signal monitored by the diverter module when the current signal exceeds a set threshold value. The trigger module sends a trigger signal to the electronic ignition assembly to enable the electronic ignition assembly to act to release high-pressure gas to drive the piston to disconnect the diverter module and disconnect the main loop. According to the invention, the diverter replaces the to-be-disconnected part of the conductive member, so that the conductive member is relatively simple in structure, and the excitation device is smaller in size.

The invention discloses a multi-pipeline shunting device for near-zero starting of an alkaline electrolytic cell, and belongs to the technical field of electrolytic cells for hydrogen production through water electrolysis. An alkaline electrolytic cell module is formed by connecting a plurality of small electrolytic chambers which are regularly arranged in parallel, and a small heating device is arranged between any two adjacent small electrolytic chambers; each small electrolysis chamber is provided with a cathode liquid inlet and an anode liquid inlet; and each small electrolysis chamber is provided with a cathode liquid outlet and an anode liquid outlet. Impact of starting current on key components such as electrodes and diaphragms of the electrolytic cell is greatly reduced by applying a multi-pipeline shunting technology, and the service life of the electrolytic cell is prolonged; the lye is conveyed through multiple pipelines simultaneously, and the temperature of the electrolyte is accurately adjusted in a stepped manner by combining small heating devices arranged in the pipelines, so that the electrolytic bath is quickly started. The hydrogen production efficiency can be improved, the unit-position hydrogen production cost is reduced, the overall performance of the alkaline electrolytic cell is improved, and wide application of the alkaline water electrolysis hydrogen production technology is promoted.

The invention discloses a network shunting device cascade system, and relates to the technical field of network communication, and the data volume of a service flow message processed by a first shunting device is not limited by the number of input ports of the first shunting device; the first shunting devices in communication connection can distribute the service flow messages to each other. Therefore, the situation that the bandwidth resources of a part of the first shunting equipment are in an idle state and the bandwidth resources of a part of the first shunting equipment are in a busy state in the prior art is avoided. Therefore, the bandwidth resource of the shunting equipment is fully utilized, and the situation that the service flow message is not processed in time is reduced.

A plurality of resistors are disclosed herein. The resistor may include one or more resistive elements and a plurality of conductive portions. Openings or slots, which can be configured to adjust temperature coefficient or resistance (TCR) values of the resistor, are formed in the resistive elements. The shape, quantity, and orientation of the openings or slots can vary. In one aspect, header assemblies are provided for securing or holding pins relative to the resistors.

The utility model relates to the technical field of tray transportation, in particular to a bidirectional tray limiting and distributing device. A two-way tray limiting and distributing device comprises a two-way conveying line provided with a plurality of chain type conveying belts and a limiting assembly arranged on the side edge of the two-way conveying line. The limiting assembly comprises a fixing base, a rotating baffle and a positioning plate, and the rotating baffle rotating in the axial direction is arranged on the fixing base. When a small tray falls to the middle section of the conveying line, the conveying line drives the small tray to be conveyed rightwards, due to the fact that the rotary baffle on the side assists in position adjustment, the small tray can be located in the middle of the conveying line, the limiting and rectifying effects are achieved, and when a large tray falls to the middle section of the conveying line, the conveying line drives the large tray to be conveyed leftwards. The rotating baffle can rotate along with the tray, so that the transportation of the tray is not influenced when the tray passes through, and after the transportation of the large tray is finished, the rotating baffle returns to the original position to carry out the next transportation of the tray.

Disclosed are exemplary embodiments of control circuits for supplying current to actuate solenoids, such as refrigerant valves in HVAC systems, other valves, “solenoid” style contactors, other coil driven actuators, etc. In exemplary embodiments, a control circuit for supplying current to actuate a solenoid comprises a solenoid coil and a switch coupled with the solenoid coil. The control circuit may be configured such that the solenoid coil is operable as a load coil and a switch mode supply coil and such that the switch is configured to operate a load and power supply of the control circuit. Additionally, or alternatively, the control circuit may include a current monitoring shunt and a flyback diode that are located in a circulating current loop defined by and / or including the solenoid coil, the current monitoring shunt, and the flyback diode.

The invention relates to the technical field of power grid equipment, in particular to a lightweight electric shunt with a temperature monitoring function and a monitoring system. The lightweight electric shunt with the temperature monitoring function comprises a temperature monitoring system, and the temperature monitoring system comprises a temperature detection module used for detecting real-time temperature information of the electric shunt in real time; the control module is used for collecting real-time temperature information and forwarding the real-time temperature information; meanwhile, whether the real-time temperature in the real-time temperature information is larger than a preset temperature threshold value or not is analyzed, and when the real-time temperature in the real-time temperature information is larger than the preset temperature threshold value, early warning information that the real-time temperature is larger than the preset temperature threshold value is output; the wireless communication module is connected with the control module and used for receiving the real-time temperature information and sending the real-time temperature information to a remote monitoring system; and meanwhile, the early warning information that the real-time temperature is greater than the preset temperature threshold is received and the alarm signal is output to trigger the alarm, so that the safety of the power grid equipment is improved.

According to the BMS test platform and the test method thereof, the cost is low, the safety is high, the controllability is high, the stability is high, the test result is more accurate, and the test efficiency can be improved. The system comprises an industrial control host and a BMS test system cabinet. The BMS test system cabinet comprises a virtual battery simulation unit, a temperature simulation detection unit, a high-voltage constant-voltage source, a high-precision constant-current source, a Hall-shunt simulation detection unit, a CAN communication detection unit, a high-precision programmable DC power supply, an insulation resistance simulation test unit, an insulation withstand voltage test unit, and a signal detection and drive simulation detection unit. An I / O driving detection unit; and a charging signal simulation detection unit. The invention is applied to the technical field of battery management systems.

The invention discloses a self-balancing multiphase self-shunting device and a control method, and belongs to the technical field of chemical separation. The device comprises an automatic split-phase tank (1), a pressure display A (2), a system pressure automatic controller (3), a light phase collecting tank (4), a liquid discharge valve A (5), a pressure display B (6), a material inlet (7), a light phase overflow port (8), a heavy phase extraction port (9), a split-phase internal component (10), a liquid discharge valve C (11), a heavy phase extraction automatic regulating valve (12), a heavy phase collecting tank (13) and the like. The device is simple in structure and control method, can be operated at normal pressure or under pressure, is high in operation elasticity, realizes self-balance of the liquid level height by utilizing the light phase overflow port (8), realizes rapid phase separation of light and heavy components by adopting a special structure of the phase separation inner component (10), forms a stable phase interface, is good in separation effect, and is suitable for industrial production. The method can be used for chemical unit operations such as extraction separation, reaction separation and rectification.

A bridgeless power factor correction (PFC) control circuit includes a non-linear current sensor. The non-linear current sensor includes a non-linear shunt, a comparator, and a reference voltage circuit. The non-linear shunt includes a capacitor connection terminal and a ground terminal. The comparator includes a first input, a reference voltage input, and a zero-crossing detector output. The first is input coupled to the capacitor connection terminal. The reference voltage circuit is coupled to the reference voltage input.

The invention discloses a withstand voltage test method and device for transformer production and a medium, and belongs to the technical field of transformer tests.The method specifically comprises the steps that firstly, a frequency conversion test power source is connected to the input end of a to-be-tested transformer and connected with a high-precision non-inductive shunt in series, and an environment monitoring unit is started to lock temperature and humidity in real time; the control power supply outputs a standard sine test voltage with a preset frequency; then, a high-frequency broadband acquisition card is used for synchronously obtaining instantaneous waveform data of voltage and total leakage current of the transformer, and analog signals are converted into discrete digital signals; performing second-order difference on the total leakage current signal to position a high-frequency abrupt change point, and reconstructing a smooth waveform through Lagrange interpolation; a current phase difference is calculated by taking a voltage zero crossing point as a phase reference, a complex plane coordinate system is constructed, and resistive and capacitive current components are calculated through waveform amplitude projection; and finally, according to the temperature and the humidity, a correction coefficient is called to normalize the resistive current, and a quality inspection result is output by comparing an insulation safety threshold.

The invention relates to a thickener distribution system, and belongs to the technical field of ore pulp treatment. Comprising a flow divider, and the flow divider is provided with a feeding end and a discharging end; the feeding end is communicated with a discharging pipeline of the thickener; the discharging end is provided with N flow dividing openings, the N flow dividing openings are sequentially arranged in the height direction of the flow divider, and the heights H of the N flow dividing openings are sequentially increased. Each flow dividing opening is communicated with one shaking table device in a one-to-one correspondence manner, and the horizontal distance between the shaking table device and the flow divider is L; and the height H of each shunting port is in negative correlation with the distance L of the shaking table device which is correspondingly communicated with the shunting port. Through reasonable design of the relationship between the height of the diversion port and the distance of the shaking table device, the problem of non-uniform ore pulp supply caused by distance difference in the prior art is relieved to a certain extent, and the efficiency and the stability of the thickener distribution system are improved.

The utility model discloses a battery management system, a battery system and an electric device. The battery management system comprises n first sampling branches, each first sampling branch is connected with a first end and a second end of a diverter, the first sampling branches are used for collecting signals of the first end and the second end of the diverter, and n is an integer greater than 1; the battery management system further comprises a processor, the processor is connected with the n first sampling branches, the processor is used for determining current flowing through the shunt according to signals collected by the n first sampling branches, and the processor is further used for determining the current collected by one of the first sampling branches as first current for any two first sampling branches and determining the current collected by the other first sampling branch as second current for any two second sampling branches. And determining the current collected by the other first sampling branch as a second current, selecting one of the first current and the second current with effectiveness, and determining the one as the current flowing through the shunt. According to the embodiment of the invention, the accuracy of current detection can be improved.

The embodiment of the invention discloses a shunt current measurement compensation method. The method comprises the following steps: acquiring an update voltage and an update current of a shunt and a sampling temperature corresponding to a first temperature sampling point; determining dissipation power according to the update voltage and the update current, and calculating an actual temperature corresponding to the shunt according to the dissipation power and a sampling temperature corresponding to the first temperature sampling point; compensating the updated voltage according to a preset linear temperature formula and the actual temperature corresponding to the diverter to obtain a compensation resistor corresponding to the diverter; and obtaining a measurement voltage corresponding to the shunt, and obtaining a compensation current corresponding to the shunt according to the compensation resistor and the measurement voltage. By implementing the embodiment of the invention, the accuracy of current measurement can be remarkably improved, and the accuracy of current measurement can also be ensured under the condition of long-time operation or environment temperature change.

The invention relates to the technical field of electronic measurement, and particularly discloses a multi-channel synchronous shunt calibration and data analysis system. The system comprises a signal acquisition front end, a delay measurement and compensation module, a synchronous control module, a data analysis and processing module and a system calibration interface, channel delay deviation is measured through a high-precision time-to-digital conversion circuit, and hardware compensation is realized in combination with a programmable delay line array. And a channel delay model and a recursive estimation algorithm are utilized to dynamically track delay drift caused by environment change, so that dynamic recovery and long-term maintenance of nanosecond-level synchronization precision are realized, and the environmental adaptability and synchronization stability of the system are remarkably improved.

The invention discloses a manganin current sampling on-line self-correction method and system of an intelligent fusion terminal. The method and system are applied to the intelligent fusion terminal comprising a manganin diverter assembly. The assembly comprises a working resistor connected in series in a main current loop and a reference resistor for monitoring, the working resistor and the reference resistor are thermally coupled, and the reference resistor does not bear working current during normal sampling. The method comprises the following steps: respectively measuring real-time resistance values of the two resistors in a silent working window period; calculating a current actually measured resistance value ratio; obtaining an ideal resistance value ratio of the two in a stress relaxation-free ideal state; obtaining a correction resistance value ratio variable quantity according to a difference value between an actual measurement ratio and an ideal ratio; and finally, calculating a correction coefficient and updating a sampling channel parameter so as to compensate resistance drift caused by long-term electric thermal stress and realize automatic correction of subsequent current sampling. According to the method, on-line and high-precision self-correction independent of an external reference is realized, and the problem of long-term stress relaxation of a manganese-copper material is effectively solved.

The utility model discloses a power battery system and relates to the technical field of power batteries. The device specifically comprises a box body, a high-voltage plug connector is arranged on the side wall of the box body, and a BDU, a BMS, at least two battery cell modules, a shunt, a main negative relay and a fuse are arranged in the box body; the positive end of the high-voltage plug connector, the BDU, the at least two battery cell modules, the shunt, the main negative relay, the fuse and the negative end of the high-voltage plug connector are sequentially connected in series through an overcurrent copper bar to form a loop; the BMS is electrically connected with the battery cell module, the BDU, the fuse and the shunt; and a PTC (Positive Temperature Coefficient) heating module for adjusting the temperature of the battery cell module is also arranged in the box body. Potential safety hazards caused by dry burning of a heating film are avoided, so that the safety of a power battery system is improved.

The invention discloses detection equipment for quartzite plate production, and relates to the technical field of quartzite plate detection, the detection equipment comprises a base, the top surface of the base is fixedly provided with a workbench, two sides of the top surface of the workbench are fixedly provided with baffle plates, and a conveyor belt is rotatably connected between the two baffle plates; a quartz stone plate body is arranged on the conveying belt; the distribution box is fixedly installed on the front side wall of the base, a controller is fixedly installed on the right side wall of the workbench, a processor is fixedly installed on the side wall, away from the quartz stone plate body, of one baffle, and an industrial camera is fixedly installed on the side wall, facing the quartz stone plate body, of one baffle. Through the arrangement of the detection device and the shunting device, accurate detection of the length, width and thickness of the quartz stone plate body is realized, automatic shunting is carried out according to the detection result, and the production efficiency and the product quality are improved.

Techniques for attenuation and obfuscation to mitigate power and / or electromagnetic (EM) field attacks on encryption circuitry are described. In certain examples, a system includes a processor core; and an accelerator coupled to the processor core, the accelerator comprising: encryption circuitry, coupled to a power source, to encrypt data into encrypted data, time-domain obfuscation control circuitry to connect and disconnect one or more capacitors to the encryption circuitry during the encrypt to provide obfuscation across a time-domain to maintain a software observable power consumption of the accelerator to about a value, and signature attenuation control circuitry to selectively connect the encryption circuitry during the encrypt to a shunt to drain power to maintain the software observable power consumption of the accelerator at about the value.

A linear motor conveyor system including: a moving element comprising at least one magnetic element and at least one bearing; a first track comprising a first linear motor, the first track configured to have a first rail on which the at least one bearing of the moving element runs and the first linear motor is configured to generate a dynamic magnetic field which acts on the magnetic element; a second track having at least a transfer region positioned adjacent the first track, the second track configured to have a second rail on which the same at least one bearing runs while in the transfer region.

The invention provides a shunt resistor with a temperature detection function, which comprises a first electrode, a second electrode, an intermediate resistor body and a circuit board acquisition device, and the intermediate resistor body is positioned between the first electrode and the second electrode. The circuit board acquisition device comprises a substrate, a sampling output connector, a temperature acquisition module and a voltage acquisition module. The substrate is provided with a contact surface and an observation surface, the contact surface faces the middle resistor body, a spacing gap exists between the contact surface and the middle resistor body, and the sampling output connector is arranged on the observation surface. And two bonding pads are arranged on the contact surface and correspond to the first electrode and the second electrode respectively. Two ends of the middle resistor body are respectively provided with a thermal insulation wall, and ventilation gaps are formed between the thermal insulation walls and the contact surfaces. According to the shunt resistor, the temperature of the shunt resistor can be acquired in real time, and the resistance values of a product at different temperatures are compensated, so that the measurement precision is improved; and meanwhile, the flowing range of molten welding fluid can be controlled during welding, and stable and firm welding is achieved.

According to the Hall sensor and shunt fused redundant current detection system and method provided by the invention, the Hall sensor and the shunt are fused, so that a heterogeneous current measurement framework is formed on the premise of not increasing the size of a current measurement device; compared with a current measurement mode formed by a single Hall sensor or a single shunt, the method has higher safety, and the common cause failure problem of sensors of the same principle is effectively avoided by using sensors of different measurement principles and data transmission paths, so that hardware has higher detection and diagnosis coverage rate; in addition, CAN communication is used in signal interaction, a low-voltage area and a high-voltage area are effectively isolated in hardware design, and CAN communication is located in the low-voltage area, so that the whole system has good insulativity; the Hall sensor is small in size and low in sensitivity to stray magnetic fields, the problem of high machining difficulty is solved, hardware cost is effectively reduced, and current detection accuracy is improved.