28 results about "Dynamic resistance" patented technology

The invention discloses a detection method and system for judging the eccentricity of an SF6 circuit breaker contact based on dynamic resistance, and relates to the technical field of high-voltage electrical equipment detection, and the method comprises the steps: obtaining an eccentricity dynamic resistance oscillogram and a standard dynamic resistance oscillogram of a to-be-detected eccentric SF6 circuit breaker through employing an SF6 circuit breaker contact eccentricity detection device; obtaining key index data according to the eccentric dynamic resistance oscillogram and the standard dynamic resistance oscillogram, wherein the key index data comprises a fluctuation index, a misalignment index, an initial value over-standard rate and a peak value over-standard rate; and generating alarm information according to the key index data, and starting maintenance operation in combination with different alarm information. The determined key index data is compared with a standard requirement value, and then whether the detected SF6 circuit breaker needs to be overhauled due to the eccentric problem of the movable and static contacts is judged, so that the potential quality hazard caused by the eccentric problem of the movable and static contacts is eliminated, and the unnecessary overhaul workload of the SF6 circuit breaker can be greatly reduced.

The present application relates to the field of data processing technology, and relates to an ecological safety pattern construction system based on a minimum cumulative resistance model, which comprises an ecological data preprocessing and source extraction module, a resistance factor extraction module, a dynamic resistance surface construction module, a cumulative resistance evaluation module, a key ecological element identification module and a safety pattern generation module, and is characterized in that: the ecological source data in a target region is subjected to feature density statistics to obtain an ecological source distribution map; the ecological source distribution map is subjected to inhibition influence analysis to obtain resistance factors; the resistance factors are subjected to spatial data superposition to obtain a dynamic resistance surface; the ecological source distribution map is subjected to spatial diffusion resistance cumulative evaluation to obtain a cumulative resistance surface; the cumulative resistance surface is subjected to key ecological element analysis to obtain ecological corridors and ecological nodes; and the ecological safety pattern of the target region is constructed according to the ecological corridors and the ecological nodes; and the present application can improve the efficiency of the ecological safety pattern construction based on the minimum cumulative resistance model.

The utility model discloses a dynamic resistance strain signal acquisition device, which comprises a detection seat, two ends of the detection seat are respectively provided with an installation part, a detection arm is arranged between the two installation parts, a detection hole is arranged in the middle of the detection arm, and four resistance strain gauges are uniformly arranged in the detection hole; a storage groove is formed in the side face of the installation part on one side, and a signal conditioning control panel is installed in the storage groove and electrically connected with the resistance strain gauges. According to the utility model, the full-bridge resistance strain gauge and the signal conditioning control board are integrated together, so that collected strain signals can be directly amplified, then converted into digital signals and directly output in a 485 form, the data collection process is further simplified, and connection and data interaction with other equipment are facilitated; the efficiency and flexibility of data acquisition are improved, and the method is more suitable for actual application scenes such as bridge monitoring.

A test and measurement system includes a device under test (DUT) interface configured to couple to at least one DUT and a measurement instrument coupled to the interface. The apparatus includes one or more processors configured to, when testing the DUT, receive a measurement signal at a first input channel and generate a first sample waveform from the measurement signal using a first set of parameters, receive a measurement signal at a second input channel and generate a second sample waveform from the measurement signal using a second set of parameters, and generating a measurement waveform from a combination of the first sample waveform and the second sample waveform. Furthermore, the measuring instrument is configured to determine a build-up error in a first pulse of the double-pulse test, and then compensate for the build-up error for a measurement made in a subsequent pulse.

The present application relates to the technical field of resistance measurement, in particular to a power generator welding machine welding quality detection method and system based on dynamic resistance curve, which synchronously collects instantaneous terminal voltage, instantaneous loop current and generator rotor phase pulse sequence; additional angle label is added and equal-angle resampling is carried out, time domain sequence is converted into fixed angle interval sequence; dynamic resistance curve is reconstructed by point-by-point division, reference dynamic resistance curve is generated by sliding median filtering and zero phase shift filtering; difference positioning feature inflection point is carried out and the curve is divided into contact resistance decay section, fusion core resistance rising section and fusion core resistance falling section; average slope and peak resistance are extracted from the rising section, falling rate and integral area are extracted from the falling section to form a multi-dimensional feature vector; welding quality index is generated by weighted fusion and normalization, and compared with standard interval to determine qualified, underwelding or overburning. The influence of speed disturbance on resistance detection is eliminated, welding is determined immediately, and the detection accuracy and on-site practicability are improved.

The application discloses a battery protection method and device based on dynamic resistance adjustment, a storage medium and a product, relates to the technical field of battery protection, and determines a charging safety threshold and a discharging safety threshold of an energy storage battery based on operation parameters of the energy storage battery; calculates target resistance values corresponding to charging conditions and discharging conditions respectively based on electrical parameters of a multi-lift circuit, the charging safety threshold and the discharging safety threshold; and controls the switching state of a switch array in an adjustable resistance network, so as to adjust the equivalent resistance of a charging current-limiting branch and a discharging current-limiting branch to the corresponding target resistance values respectively. The application realizes the accurate matching of charging and discharging currents with the real-time state of a battery pack and multi-lift conditions, guarantees the safety of the energy storage battery, reduces the safety risk of the battery, improves the stability of system operation, and improves the energy recovery efficiency.

The present invention relates to a hybrid resistance generation system for fitness equipment, which combines a conventional weight stack with an electromechanical resistance module. The system includes a housing, preferably provided with separate chambers for each component, to ensure that mutual interference is minimized. The physical resistance source and the electromechanical resistance source are connected in series, providing dynamic resistance adjustment during exercise. A sensor system tracks the applied resistance and the movement of the weight stack, providing real-time feedback. The system is applicable to various fitness equipment and provides enhanced user interaction through integrated data processing, so that resistance modes can be seamlessly joined and customized training plans can be provided.

The invention relates to a method for evaluating dynamic reference resistance curves (RRC) for resistance welding processes, wherein, based on at least one operating parameter of at least one resistance welding device and at least one material parameter of at least two workpieces to be welded, operating values ​​for at least one dynamic reference resistance curve (RRC) are specified for carrying out a corresponding welding process, and the at least one dynamic reference resistance curve (RRC) is generated, wherein at least one welding process is carried out with the at least one dynamic reference resistance curve (RRC) and the resistance welding device is controlled in such a way that the operating values ​​specified in the at least one reference resistance curve (RRC) are at least approximately reflected in at least one corresponding dynamic resistance curve (RK).wherein at least one dynamic reference resistance curve (RRK) is evaluated and stored based on at least one corresponding dynamic resistance curve (RK) and at least one quality criterion (QC), as well as a corresponding resistance welding process and a corresponding resistance welding device.

The invention discloses a battery protection method and device based on dynamic resistance trimming, a storage medium and a product, and relates to the technical field of battery protection, and the method comprises the steps: determining a charging safety threshold and a discharging safety threshold of an energy storage battery based on the operation parameters of the energy storage battery; target resistance values corresponding to the charging working condition and the discharging working condition are calculated based on the electrical parameters of the multiple elevator loops, the charging safety threshold value and the discharging safety threshold value; and controlling the on-off state of a switch array in the adjustable resistance network, and adjusting the equivalent resistance of the charging current-limiting branch and the equivalent resistance of the discharging current-limiting branch to corresponding target resistance values. Accurate matching of the charging and discharging current and the real-time state of the battery pack and the working conditions of multiple elevators is achieved, the safety of the energy storage battery is guaranteed, the safety risk of the battery is reduced, the operation stability of the system is improved, and the energy recovery efficiency is improved.

The utility model provides a dynamic resistance tester chuck, and belongs to the field of resistance testing. The chuck comprises an upper pressing plate, a lower pressing plate, a rotating bolt, a top plate and a bottom plate, wherein the top plate and the bottom plate are arranged in parallel. The side portions of the top plate and the bottom plate are connected through a supporting beam. The rotating bolt penetrates through the top plate and is rotationally connected with the upper pressing plate; the bottom plate is connected with the base through a connecting beam, and the upper pressing plate and the lower pressing plate are provided with a first clamping plate and a second clamping plate respectively, the first clamping plate and the second clamping plate are clamped on the upper pressing plate and the lower pressing plate respectively, and the fastening bolt transversely penetrates through the horizontal base surfaces of the first clamping plate and the second clamping plate to fasten the first clamping plate and the second clamping plate; the first clamping plate and the second clamping plate are made of insulating materials; a first conducting strip is arranged on the surface of a first clamping plate on the lower pressing plate, and the first conducting strip is provided with a lug for clamping a meter pen of a universal meter; a second conducting strip is arranged on the surface of the first clamping plate on the upper pressing plate. According to the utility model, the convenience and accuracy of resistance testing can be improved.

The invention provides an air bellow with an air cushion and an adjustable mechanism and gilding equipment, and relates to the technical field of gilding equipment.The air bellow supplies air into an air bellow cavity through an air supply unit, the air cushion is formed between the inner wall of the air bellow and alumite, non-contact transmission between the alumite and the inner wall of the air bellow is achieved, dynamic resistance generated by contact friction is eliminated, and the gilding efficiency is improved. And the stability of the gold stamping quality is improved. In addition, through sliding fit of the fixing part and the connecting part of the adjustable mechanism, flexible adjustment of the position of the partition plate in the single air box is achieved, the overall structure is simple, adjustment is convenient and fast, the gilding operation requirements of different intervals can be flexibly met, the gilding quality is guaranteed, meanwhile, the equipment occupied area and the manufacturing cost are reduced, and the production adaptation is improved. In addition, the driving mechanism drives the collecting roller to be close to or away from the opening of the air bellow body, the collecting roller receives the dropped alumite during shutdown, and the problem that the dropped alumite needs to be tidied one by one after shutdown is solved.

The application is a method for regulating and controlling dynamic resistance in the process of cigarette smoking, which is carried out according to the following steps: measuring and counting actual resistance data a corresponding to cigarette length n ; drawing a complete resistance variation curve; drawing a correction curve according to the resistance variation curve; forming holes on the surface of the cigarette in the cigarette length area corresponding to the correction curve to increase the air permeability of the cigarette paper and realize reverse regulation of reducing the resistance of the area. The method reasonably adjusts the punching on the surface of the cigarette according to the detection data, considers the fact that the resistance of the tail end of the cigarette increases due to the compaction and rolling technology of the tobacco and the resistance of the middle section of the cigarette is moderate and does not need to increase the air permeability to make corresponding adjustment, and is more in line with the actual situation when the cigarette is used.

The application relates to a hybrid resistance generation system for exercise machines, combining a traditional weight stack with an electromechanical resistance module. The system includes a housing, preferably with separate chambers for each component, ensuring minimized interference. Physical and electromechanical resistance sources are connected in series, offering dynamic resistance adjustments during workouts. A sensor system tracks the resistance applied and movement of the weight stack, providing real-time feedback. The system is adaptable to various exercise machines and offers enhanced user interaction through integrated data processing, enabling seamless transitions between resistance modes and customized training programs.

The invention discloses a potential clamping silicon carbide floating island device with zero dynamic resistance degradation. The potential clamping silicon carbide floating island device comprises an N-type doped semiconductor epitaxial layer, a P-type doped semiconductor well and M P-type local heavily-doped semiconductor floating islands, the P-type doped semiconductor well is arranged at the top of the N-type doped semiconductor epitaxial layer; m P-type local heavily-doped semiconductor floating islands are arranged in the N-type doped semiconductor epitaxial layer below the P-type doped semiconductor well at equal intervals from top to bottom; wherein the upper surface of the P-type local heavily-doped semiconductor floating island at the top is in contact with the lower surface of the P-type doped semiconductor well; each P-type local heavily-doped semiconductor floating island comprises a bottom floating island area, a middle floating island area and a top floating island area which are sequentially arranged from bottom to top; the P-type doping concentration of the bottom floating island area and the P-type doping concentration of the top floating island area are both larger than the P-type doping concentration of the middle floating island area. Zero dynamic resistance degradation can be achieved, and meanwhile the contradictory relation between the breakdown voltage and the on-resistance of the device is improved.

The application relates to the field of systems for adjusting electric variables, and discloses a dynamic resistance compensation adjustment method for a high-linearity potentiometer, which comprises the following steps: collecting real-time voltage and excitation current of an adjustment node, and calculating the apparent resistance of an adjustment tap position; using a first-order difference operator to extract a dynamic evolution gradient representing impedance distribution characteristics and interface random interference noise; comparing the evolution gradient with an ideal linear slope to determine a deviation ratio coefficient; adjusting the feedback branch gain according to the deviation ratio coefficient, and introducing a phase lead compensation link based on the change rate of the deviation ratio coefficient; the application generates a forward reverse adjustment level, neutralizes signal phase lag caused by micro contact hysteresis of materials, makes the output electric parameter stable in a preset linear interval, effectively reduces full-range linearity error, suppresses the interference of interface transition impedance fluctuation on adjustment smoothness, and ensures that a precision adjustment link maintains a high-precision adjustment reference in a wide-temperature environment.

A method and industrial installation for monitoring a process of resistance spot welding, wherein the method comprises the steps of: disposing two or more steel sheets (1, 2) one on another, such that a surface of one of the steel sheets (1) becomes in contact with another surface of the other steel sheet (2), wherein at least one of the contact surfaces of the steel sheets (1, 2) has an AlSi coating, applying a current pulse with a certain period to the steel sheets (1, 2), thus removing the AlSi coating on a spot where the steel sheets (1, 2) are going to be welded, measuring on the steel sheets (1, 2) a voltage and a current at the beginning of the current pulse applied, from the measured voltage and the measured current, calculating a dynamic resistance at the beginning of the applied current pulse, and evaluating the thickness of the interdiffusion layer of the contact surfaces of the steel sheets (1, 2) from the calculated dynamic resistance.

This invention discloses a method for detecting the opening and closing performance of circuit breakers based on dynamic resistance monitoring, belonging to the field of equipment performance testing technology. The method includes: acquiring resistance sensor sampling values ​​during the opening and closing processes of the circuit breaker; constructing a periodic resistance curve based on the resistance sensor sampling values ​​according to each opening and closing cycle; generating a periodic resistance data set; dividing each periodic resistance curve into multiple equally spaced fusion windows; extracting the resistance change slope value, resistance fluctuation amplitude value, and the number of second-order disturbance points in each fusion window to construct a fusion window feature sequence; constructing fitting functions for the resistance change slope value and fluctuation amplitude value based on the multiple fusion window feature sequences of the normal cycle, and superimposing a disturbance response function constructed based on the number of disturbance points; this invention achieves effective identification of performance degradation cycles throughout the entire opening and closing process of the circuit breaker, enhancing the ability to predict and intervene in advance regarding the circuit breaker's operating status.

The application provides a dynamic adjustment strategy for the resistance change of an aging battery and a battery control method. The method comprises the following steps: monitoring the output end of the started battery in real time to generate battery output voltage data; judging the resistance change state of the battery according to the battery output voltage data to generate internal resistance change trend data; deploying a semiconductor resistor with an adjustable resistance value at the output end of the battery based on the internal resistance change trend data to construct a dynamic resistance adjustment network; and adjusting the resistance value of the semiconductor adjustable resistor through an MCU, thereby improving the stability of the battery output voltage, ensuring that the vehicle system always works in a normal voltage range, reducing the voltage fluctuation risk caused by the increased internal resistance of the aging battery, and effectively reducing the occurrence of the situation that the vehicle system misjudges the battery failure and refuses to start.

The invention discloses a control method for a high-temperature superconducting magnet, and belongs to the technical field of superconducting energy storage control, and the method comprises the steps: obtaining a measurement voltage, a measurement current and a plan power value sequence of the high-temperature superconducting magnet; based on the measured voltage, the measured current and the electromagnetic dynamic model, internal state variables are obtained, and the internal state variables comprise dynamic resistance capable of reflecting superconducting performance changes; inputting the planned power value sequence and the internal state variable into a magnet state prediction model to generate an internal state variable prediction sequence and a current prediction sequence; judging whether a quench risk or a thermal instability risk exists or not; when the risk exists, adjusting the plan power value sequence to obtain an optimized power value sequence, and taking the optimized power value sequence as a target power value sequence; and if no risk exists, taking the planned power value sequence as a target power value sequence. And controlling according to the target power value sequence. According to the invention, the problem that the control of the high-temperature superconducting magnet is not accurate enough in the prior art is solved.

The invention relates to the technical field of resistance spot welding monitoring, in particular to a multi-factor coupling welding electrode abrasion degree online evaluation method which comprises the steps that on the basis of current and voltage data in the existing welding process, according to real-time current data and voltage data, dynamic resistance is calculated, and a discrete data set with the resistance changing along with time is obtained; performing dynamic data processing according to the obtained discrete data set, performing static data processing based on the obtained resistance data, calculating peak time delay by using the discrete data set, calculating a dynamic resistance drop rate according to a dynamic resistance curve, and performing normalization processing on the dynamic resistance drop rate; according to the method, the multi-dimensional characteristic factors are fused, and the electrode abrasion state is comprehensively reflected from multiple angles such as the resistance change speed, the curve form, the resistance peak value time delay and the resistance drop rate.

The invention discloses a dynamic detection and judgment method for NTC resistance, and relates to the technical field of electrical element detection. The method comprises the following steps: acquiring a real-time resistance value and a current temperature of the NTC thermistor; according to the current temperature, dynamically generating a dynamic resistance value qualified range corresponding to the current temperature through a pre-stored NTC resistance value-temperature fitting model; and comparing the real-time resistance value with the dynamic resistance value qualified range, and outputting a judgment conclusion according to a comparison result. By converting a fixed resistance value judgment standard into a judgment standard dynamically changing along with the temperature, the problems of low detection precision and high misjudgment rate in the prior art are solved, and scientific and accurate detection matched with NTC nonlinear characteristics is realized.

The invention relates to an assembly having a module (1) for regulating a fluid flow. The module (1) comprises a first element (2) having a plurality of channels (4) and a second element (3) having a plurality of bodies (5). The elements (2, 3) are arranged so as to be axially movable relative to one another, and each body (5) is associated with a channel (4) in order to release a different number of channels (4) depending on the position of the elements (2, 3) relative to one another.

The test measurement system includes a DUT interface configured to be coupled to at least one device under test (DUT), and a measuring device coupled to this interface. This measuring device has one or more processors configured to receive a measurement signal on a first input channel during DUT testing, generate a first sample waveform from the measurement signal using a first parameter set, receive a measurement signal on a second input channel, generate a second sample waveform from the measurement signal using a second parameter set, and generate a measurement waveform from the combination of the first and second sample waveforms. Furthermore, the measuring device is configured to measure the settling error in the first pulse of a double-pulse test and correct the measured values ​​in subsequent pulses for the settling error.

The application discloses a life evaluation method, medium and system of a double-break circuit breaker, comprising: establishing a double-break circuit breaker simulation model; obtaining the cumulative transferred charge and energy of an arc caused by each ablation test; drawing a dynamic resistance-travel curve according to a dynamic resistance-travel measurement test corresponding to each ablation test, and obtaining characteristic parameters therefrom; taking the cumulative transferred charge and energy of the arc of different numbers of ablation tests and the characteristic parameters as first characteristic variables to form training samples; inputting the training samples into a trained neural network to obtain the contribution degree of each type of first characteristic variable; selecting a preset number of first characteristic variables with the largest contribution degree as second characteristic variables; collecting the second characteristic variables of an actual double-break circuit breaker and inputting the second characteristic variables into the trained neural network to output the life score of the actual double-break circuit breaker and determine the life grade. The application can accurately evaluate the life of the double-break circuit breaker.

The application discloses a kind of fast evaluation test methods of GaN HEMT dynamic resistance characteristics, and the initial basic electrical parameter before stress is applied to the device to be tested is obtained by extracting experiment;Through the stress experiment, the gate-drain access area trap and buffer layer trap that lead GaN HEMT dynamic resistance characteristics degradation are applied controllable stress;By comparing the change amount of basic electrical parameter, drain current and on-resistance before and after stress is applied to the device to be tested, and combining the failure judgment standard set, the fast evaluation of GaN HEMT dynamic resistance characteristics is realized.The application significantly improves the test efficiency of GaN HEMT dynamic reliability evaluation, and can efficiently complete the fast evaluation of device dynamic on-resistance degradation in a short time, and does not need complex test platform construction and experimental condition design, simplifies the complicated procedure required for evaluating HEMT dynamic resistance characteristics, and is suitable for fast screening and dynamic reliability evaluation of device in engineering.

The embodiment of the application discloses a battery protection method and related device, the method comprises: calculating the whole package direct current equivalent resistance of the battery package, the maximum direct current equivalent resistance corresponding to the maximum voltage battery unit and the minimum direct current equivalent resistance corresponding to the minimum voltage battery unit; determining the charging limit power of the battery according to the whole package direct current equivalent resistance and the maximum direct current equivalent resistance; determining the discharging limit power of the battery according to the whole package direct current equivalent resistance and the minimum direct current equivalent resistance; determining the power limit range of the battery according to the charging limit power and the discharging limit power. In this way, the limit power range of the battery can be determined by three kinds of dynamic resistances calculated at different temperatures, which can make the limit power range of the battery more reasonable, thereby effectively improving the stability of the battery at different temperatures, effectively protecting the battery while exerting the performance of the battery as much as possible, and further improving the driving experience of the vehicle.

The application relates to a hybrid resistance generation system for exercise machines, combining a traditional weight stack with an electromechanical resistance module. The system includes a housing, preferably with separate chambers for each component, ensuring minimized interference. Physical and electromechanical resistance sources are connected in series, offering dynamic resistance adjustments during workouts. A sensor system tracks the resistance applied and movement of the weight stack, providing real-time feedback. The system is adaptable to various exercise machines and offers enhanced user interaction through integrated data processing, enabling seamless transitions between resistance modes and customized training programs.

The invention discloses an ecological corridor construction method based on a linear element vector field and anisotropic resistance. The method comprises the steps of data acquisition and preprocessing, construction of a basic isotropic resistance surface, construction of a linear element direction vector field, construction of an anisotropic dynamic resistance model, generation of an anisotropic accumulated consumption surface, corridor recognition and extraction of an ecological corridor. According to the method, a linear interference element is converted into a global direction vector field, an anisotropic resistance consumption function based on an included angle between a moving direction and an interference direction is constructed, and a microscopic ecological corridor which is close to a road edge green belt, a river bank forest land and the like and is high in concealment and good in connectivity can be effectively identified; and the construction fineness and scientificity of the ecological safety pattern of the high-intensity human activity area are obviously improved.