28 results about "Capacitive measurement" patented technology

This invention relates to an intelligent flow sensing method and system for cold-pressing amorphous alloy powder, belonging to the field of flow measurement technology. The method includes constructing an acoustic emission feature vector; inputting the original capacitance measurement tensor and acoustic emission feature vector into a capacitance tomography reconstruction algorithm to construct a multi-frequency dielectric-mechanical coupled Gaussian mixture model; performing soft classification decoupling on the dielectric constant distribution matrix to generate a shear band density field and a porosity distribution field; introducing the shear band density field to perform free volume correction on the powder's apparent density distribution field, and solving to obtain a real-time flow characteristic scalar; inputting this time-series graph structure data into a graph neural network-long short-term memory coupled model; comparing the shear band network connectivity with a threshold in real time; and constructing a multi-objective cost function to achieve coordinated control of high-precision flow tracking and active suppression of shear band instability during cold pressing. This invention improves the flow sensing accuracy, instability early warning timeliness, and process control coordination of cold-pressing amorphous alloy powder.

Disclosed in the present invention is a pyramid-like multi-modal three-dimensional force measurement device, comprising a cylindrical thin wall, four spring plates, a multi-modal measurement module, a needle fixing structure and a signal processing module, wherein the four spring plates are symmetrically arranged within the cylindrical thin wall, one end of each spring plate is fixed to the edge of the inner wall of the cylindrical thin wall, the other ends of the spring plates extend towards the interior of the cylindrical thin wall and converge on a central connection block, and each spring plate is provided with a strain gauge, a magnetization region, and a first pole of a capacitor; a Hall magneto-electric element is provided on the inner wall of the cylindrical thin wall at a position opposite each magnetization region; the needle fixing structure is configured to fix an object to be subjected to measurement; second poles of capacitors are arranged on a needle-like elongated sharp object to be subjected to measurement; the multi-modal measurement module comprises a resistive strain gauge measurement module, a Hall magneto-electric measurement module, and a capacitive measurement module; and the signal processing module is configured to fuse three-dimensional forces calculated by the resistive strain gauge measurement module, the Hall magneto-electric measurement module and the capacitive measurement module and output the result.

The application discloses a capacitor measurement circuit and a capacitor measurement method, and belongs to the field of semiconductors. The capacitor measurement circuit can accurately measure the junction capacitance of a semiconductor detector (a device to be measured) in real time and on line while applying thousands of volts of direct-current working voltage to the semiconductor detector by coupling an alternating-current test signal in a high-voltage bias loop and directly responding to charge changes by using a detection module, so that the measurement result truly reflects the capacitance characteristics of the device under the actual high-voltage working state. The entire circuit adopts a topology combining alternating-current injection and charge detection, effectively isolates the influence of high-voltage direct current on the precision detection circuit, guarantees high measurement precision and a signal-to-noise ratio, has good electrical safety, and is also compatible with the capacitor measurement demand under conventional low-voltage or zero-bias conditions, thereby improving the universality and application flexibility of the circuit.

This invention provides a measurement system and method for the flow intensity distribution of a spray field, relating to the field of spray measurement technology. The system includes: a spray source for spraying a spray liquid; a spray measurement array layer disposed downstream of the spray source, comprising a capacitance measurement structure and a fluid sampling array, wherein the capacitance measurement structure measures the change in dielectric properties caused by the spray liquid at the inlet region of the fluid sampling array to obtain spatial relative distribution information of the spray flow intensity; the fluid sampling array is used to introduce the spray liquid into its region; a pressure measurement structure measures the pressure signal within the fluid sampling array to obtain absolute quantitative information of the spray flow intensity; and a processor reconstructs the spatial distribution of the spray field intensity based on the spatial relative distribution information and the absolute quantitative information. This invention can ensure the measurement accuracy of the spray field flow intensity while achieving high temporal resolution and real-time quantitative measurement of the flow field intensity distribution.

This invention discloses a method for identifying coal and coal gangue based on capacitance tomography. It utilizes a differential capacitance tomography electrode sensor to collect capacitance measurement data of coal, coal gangue, or mixtures thereof within the measured area. Direct coupling capacitance between electrodes is canceled by applying an inverse excitation signal. The raw data is preprocessed, and stable and valid capacitance measurements are selected to form a data vector. A regularized iterative algorithm is used to solve for the dielectric constant distribution, combining a preset sensitivity distribution function. An initial solution is obtained through regularization, and then iteratively updated until convergence. Image reconstruction is performed based on the dielectric constant distribution. After normalization and edge detection, a capacitance tomography image representing the location, size, and dielectric differences of the materials is generated. The image grayscale values ​​are analyzed, and coal and coal gangue regions are automatically identified and marked according to a preset dielectric constant threshold range. Simultaneously, their centroid coordinates and equivalent areas are calculated, achieving non-destructive and accurate identification of the mixture components.

This invention proposes a circuit for measuring capacitance based on a charging method. A charging control module precisely controls the charging and discharging timing of an external capacitor under test. A parameter detection unit collects the voltage or current changes during the capacitor's charging process in real time, and the capacitance value is calculated based on the correlation between charging / discharging time and capacitance value. Existing capacitance measurement methods often rely on external instruments for manual operation. This method only enables offline measurement and cannot monitor the capacitor's state during normal chip operation, especially in harsh operating environments where it is difficult to capture dynamic changes in capacitance value in real time. This invention integrates the charging measurement circuit inside the chip, overcoming the limitations of traditional offline measurement and enabling in-service real-time testing of external capacitors under test. It can dynamically track changes in capacitance value; simultaneously, the integrated design architecture effectively enhances the circuit's robustness in complex environments, achieving real-time monitoring of the capacitor's state.

This utility model discloses a variable vacuum capacitor, comprising: a driving unit, a capacitance measuring unit, and a protection unit; the measuring end of the capacitance measuring unit is connected to the electrodes of the capacitor element of the variable vacuum capacitor, and the capacitance measuring unit is used to measure the capacitance value of the capacitor element; the driving unit is connected to the capacitance measuring unit, and the driving unit is configured to generate a driving signal based on the capacitance value, the driving signal being used to control the movement of the actuator of the variable vacuum capacitor, thereby adjusting the capacitance value of the capacitor; the protection unit is connected in series in the signal transmission circuit of the capacitance measuring unit, and the protection unit is used to connect or disconnect the signal transmission circuit.

This application discloses a supercapacitor measurement method and system, relating to the field of supercapacitor testing technology. The method employs segmented discharge combined with dynamic threshold determination. First, a large current is rapidly passed through the nonlinear region. Then, the effective measurement range is adjusted in real time based on temperature, discharge current, and internal resistance. Finally, a small current is switched to complete high-precision sampling. Therefore, this method solves the technical problems of traditional measurement methods, such as susceptibility to operating condition fluctuations, inaccurate linear region determination, large nonlinear region errors, and poor measurement consistency. It achieves high measurement accuracy, strong adaptability, stable and reliable results, and faster detection speed.

A computing system including a quantum computing device. The quantum computing device includes a Majorana island at which Majorana zero modes (MZMs) are instantiated. The quantum computing device further includes a quantum dot electrically connectable to an MZM, a capacitance sensor capacitively coupled to the quantum dot, and a controller. The controller is configured to set a Majorana island gate voltage of the Majorana island and a quantum dot gate voltage of the quantum dot to a candidate resonance Majorana island voltage and a candidate resonance quantum dot voltage. The controller is further configured to receive a capacitance measurement of the quantum dot and the Majorana island and determine whether resonance occurs based on the capacitance measurement. The controller is further configured to reset the gate voltages. The controller is further configured to output a quasiparticle poisoning value indicated by the one or more determinations of whether resonance occurs.

An ADC with built-in charge-based capacitance measurement is described. Examples include: multiple capacitors coupled in parallel to an input voltage at a common node; multiple drivers, each coupled to a corresponding capacitor opposite the common node; a first switch coupled to the common node to couple the common node to ground in response to a second clock signal from a timing generator; a second switch coupled to the common node to couple the common node to a reference voltage in response to a third clock signal from the timing generator; successive logic circuitry configured to control each driver to alternately drive the second clock signal to a selected capacitor or couple a selected capacitor to ground; and measurement logic including a current sensor for measuring the current through the common node and configured to determine the capacitance of the selected capacitor.

A flexible or rigid fluid-carrying conduit system has an inner conduit, an outer member, and a space between the inner conduit and outer member, the space including an insulator. Each of the outer surface of the inner conduit and the inner surface of the outer member is electrically conductive. These electrically conductive surfaces are used for detection of moisture in the fluid-carrying conduit by providing either an electrical circuit or a capacitance measuring device. Completion of the electrical circuit provides an indication that moisture has entered the space between the inner conduit and outer member so that remedial action can be taken. Measuring the capacitance between the inner conduit and the outer member also allows for monitoring moisture in this space. The capacitance measuring function can also be used to monitor changes in thermal resistance of the conduit. The fluid-carrying conduit have a liner, bulk insulation, and a vapor barrier.

The objective is to provide a sheet that can detect sweating using a heating element. [Solution] The seat comprises a first heater wire H1 and a second heater wire H2 that generate heat when energized, a control unit 100, and a measurement circuit 90. The second heater wire H2 is not connected to the first heater wire H1. The control unit 100 heats the seat surface of the seat by energizing the first heater wire H1 and the second heater wire H2. The measurement circuit 90 measures the capacitance between the first part of the first heater wire H1 and the second part of the second heater wire H2. The first part becomes the first electrode of the capacitor when measuring capacitance. The second part extends parallel to and adjacent to the first part at a predetermined distance, and becomes the second electrode of the capacitor when measuring capacitance.

A touch panel device (200) comprises: a touch panel (100) that has a touch sensor having a capacitive sensor electrode; and a controller (22) that controls the touch panel (100). The controller (22) has: a detection function (221) for detecting adhesion of a liquid to the touch panel (100) when a user has touched a first position on the touch panel (100); a calculation function (223) for, when the adhesion of the liquid has been detected by the detection function (221), calculating the conductivity of the adhered liquid on the basis of the results of measuring capacitance at a plurality of first detection frequencies; a determination function (224) for determining, on the basis of the calculated conductivity, a second detection frequency for deriving the first position touched on the touch panel (100); and a derivation function (225) for using the determined second detection frequency to derive the first position touched by the user.

This invention discloses a three-in-one sensor for in-ear headphones, comprising: a substrate; a bare die disposed on the top of the substrate, the bare die including a differential delay chain, a microprocessor, and a power and clock management unit, the differential delay chain being electrically connected to the microprocessor, the microprocessor being electrically connected to the power and clock management unit, a pin frame disposed at the top edge of the substrate, and further including pins, the pins being disposed on the top of the substrate through the pin frame. This three-in-one sensor for in-ear headphones, through a highly stable internal reference discharge circuit, absoluteifies the relative diffusion time, thereby quantizing the discharge circuit composed of the external capacitor under test and the internal reference resistor, realizing high-speed, low-power multi-channel capacitance measurement.

The application provides a kind of capacitance measuring device, method and chip probe test system.The capacitance measuring device includes probe plate and capacitance measuring circuit, probe plate includes probe, and capacitance measuring circuit includes LC resonant circuit and current drive unit.LC resonant circuit is used to be connected in parallel with the two poles of probe and the chip to be measured, LC resonant circuit has no-load state and loaded state, when probe and the chip to be measured do not contact, LC resonant circuit is in no-load state;When probe and the chip to be measured are in contact, LC resonant circuit is in loaded state.Current drive unit is used to provide driving current for LC resonant circuit, to make LC resonant circuit produce resonance, and resonance amplitude is lower than the opening voltage of the diode inside the chip to be measured.Capacitance measuring device is used to obtain the capacitance of the chip to be measured based on the data of the resonance waveform of LC resonant circuit in loaded state and no-load state, by calculating processing to obtain the capacitance offset of LC resonant circuit.

The application relates to a capacitive tomography method and system based on a two-stage neural network of physical information. The method comprises the following steps: collecting boundary capacitance measurement vector data of an imaging area under different electrode excitation modes; constructing a potential field reconstruction network as a first neural network, setting a hard boundary layer constraint in an output layer to meet a Dirichlet boundary condition, and constructing a first loss function to output a multi-channel potential field distribution of the imaging area; constructing a physical constraint inverse problem network as a second neural network, constructing a second loss function based on an electrostatic field Poisson equation and a multi-type electrode boundary condition, and inversely obtaining a preliminary dielectric constant distribution; constructing a hybrid loss function, obtaining a two-stage neural network through training, and obtaining a final dielectric constant distribution; and outputting and visualizing the final dielectric constant distribution to generate a capacitive tomography result of the imaging area, so that the imaging accuracy of capacitive tomography is improved.

This invention provides an automatic closed-loop control system and method for excitation amplitude in DLCP testing. The system includes: a multi-frequency AC excitation and DC bias application module for automatically applying AC excitation signals and DC bias signals according to a preset excitation amplitude sequence at multiple test frequencies; a PID closed-loop control module for performing closed-loop correction of the applied voltage based on the response of the test port of the semiconductor device under test, ensuring that the applied voltage condition at the test port meets preset requirements; a capacitance measurement module for acquiring the equivalent capacitance response signal of the semiconductor device under test; a capacitance test data caching module for associating, marking, and classifying capacitance test data according to test frequency, excitation level, and bias setpoint; and a main control module for coordinating the automatic test process under multiple test frequencies and different excitation amplitude conditions, and outputting the corresponding capacitance test data to improve the consistency, stability, and automation of DLCP testing.

Wireless circuitry is provided that includes a transformer having a primary coil and a secondary coil, a first group of switchable capacitors coupled to a first terminal of the primary coil, a second group of switchable capacitors coupled to a second terminal of the primary coil, and capacitance measurement circuitry selectively coupled to a center tap of the primary coil during a measurement mode. The capacitance measurement circuitry can include a current source, a current sink, a comparator, a voltage generator for providing one or more threshold / reference voltages to the comparator, a frequency measurement circuit, and a capacitance calculation circuit configured to compute a capacitance of the first and second groups of switchable capacitors.

This invention relates to a method for dual background image reconstruction and fusion in capacitance tomography, the method being as follows: (1) Constructing a capacitance tomography system model and obtaining the sensitivity fields of two capacitance tomography systems that form a dual background relationship. (2) Obtaining capacitance measurement data of a pipe filled with a first medium A and a second medium B; simultaneously obtaining capacitance measurement data with the first medium A as the background and the second medium B as the object under test. (3) Using the Landweber iterative algorithm, reconstructing images with the first medium A and the first medium B as the background respectively, and obtaining their reconstructed image results. (4) Fusing the reconstructed image results based on physical consistency constraints, and outputting the final fused image reconstruction result. This invention improves the quality of the reconstructed image, making the reconstructed medium distribution closer to the real distribution; it also improves the robustness and consistency of the image reconstruction results.

The application relates to a kind of amorphous alloy powder cold pressure flow intelligent perception method and system, it is related to flow measurement technical field, including constructing acoustic emission feature vector;Original capacitance measurement tensor and acoustic emission feature vector are input into the reconstruction algorithm of electrical capacitance tomography, construct multi-frequency dielectric-mechanical coupling Gaussian mixture model;Soft classification decoupling is carried out to dielectric constant distribution matrix, and shear band density field and porosity distribution field are generated;Introduce shear band density field to the apparent density distribution field of the powder to carry out free volume correction, and solve to obtain real-time flow characteristic scalar;The time series graph structure data are input into graph neural network-long short-term memory coupling model;Shear band network connectivity is compared with the threshold value in real time;Multi-objective cost function is constructed, and the collaborative control of high-precision tracking of flow and active inhibition of shear band instability in cold pressing process is realized.The application improves the flow perception accuracy, instability early warning timeliness and process control synergy of amorphous alloy powder cold pressing.

The application provides a kind of capacitance measurement circuit and system, circuit includes: switch circuit, switch circuit connects the capacitance to be measured and power supply, switch circuit is used to control the capacitance to be measured and charges through the output voltage of power supply.Comparison circuit, the first input end of comparison circuit is connected to the capacitance to be measured, the second input end of comparison circuit receives reference voltage, comparison circuit is used to output trigger signal in response to the voltage of the capacitance to be measured greater than or equal to reference voltage.Time counting circuit, time counting circuit is connected to comparison circuit, time counting circuit is used to determine charging duration in response to trigger signal.Control circuit, control circuit is used to determine the capacitance value of the capacitance to be measured according to charging duration, the output voltage of power supply, reference voltage.Thereby, the precision and efficiency of the application provided can be improved capacitance value measurement.

A system (100) operable between a charging mode and a transfer mode to measure a capacitance of a capacitive sensor (10) comprises a switching unit (102) configured to arrange the capacitive sensor (10) to be charged from a first end (10a) of the capacitive sensor (10) by a first supply voltage (14a) in a first phase of the charging mode until a voltage difference between the first end (10a) and an opposite second end (10b) of the capacitive sensor (10) reaches a first predetermined voltage, and to disconnect the first end (10a) of the capacitive sensor (10) from the first supply voltage (14a) and to couple the second end (10b) of the capacitive sensor (10) to a second supply voltage (14b) in a second phase of the charging mode to cause a voltage at the first end (10a) of the capacitive sensor (10) to rise to a second predetermined voltage.

The application discloses a kind of capacitive capacity monitoring method and system of flexible direct current converter station bushing, it is related to the field of flexible direct current transmission equipment on-line monitoring and electrical parameter identification technique, including in the bushing of flexible direct current converter station bushing end screen and ground setting capacitor voltage divider and constructing series capacitor measurement structure, acquisition bushing primary voltage signal and end screen current.Primary voltage signal and end screen current are carried out synchronous signal preprocessing, using wavelet transform and filtering strategy to remove noise and extract frequency domain features.Capacitive capacity coupling relationship of bushing structure parameter is calculated based on frequency domain features, and abnormal point is judged by establishing capacitive capacity change identification model and combining temperature and humidity data.The method described in the application effectively overcomes the problems of static analysis lag, single variable misjudgment and insufficient frequency spectrum resolution, realizes real-time monitoring of flexible direct current bushing capacitive capacity, abnormal dynamic early warning and system improvement of model adaptability, and significantly enhances the safety operation guarantee capability of equipment throughout its life cycle.

This application provides a fixed electrode and a capacitive thin-film vacuum gauge. The fixed electrode is formed by setting an inner ring plating layer and an outer ring plating layer on the substrate surface, and setting an isolation plating layer between the two and / or outside the outer ring plating layer, so that the inner ring plating layer, the outer ring plating layer and the isolation plating layer form a partitioned arrangement structure on the substrate surface. The isolation plating layer is electrically connected to the ground terminal, which can form a stable electric field shielding boundary between the inner ring plating layer and the outer ring plating layer, thereby limiting the propagation path of the electric field in the edge region and reducing the electric field coupling effect between the inner ring plating layer and the outer ring plating layer. On this basis, when the metal diaphragm undergoes elastic deformation as a variable electrode and causes capacitance change, the additional capacitance interference introduced by electric field coupling can be reduced, the independence of the capacitance measurement signals corresponding to the inner ring plating layer and the outer ring plating layer can be improved, thereby improving the stability and consistency of capacitance measurement.

An integrated circuit device is provided. In some examples, an integrated circuit die of the device includes a first capacitor arranged such that when the integrated circuit die is coupled to a package, the package affects a capacitance of the first capacitor, a second capacitor disposed directly underneath the first capacitor, and a capacitance measurement circuit coupled to the first capacitor and the second capacitor to determine the capacitance of the first capacitor and a capacitance of the second capacitor. The integrated circuit device may detect tampering with the die and / or the package based on the capacitances of the first capacitor and the second capacitor.

The application discloses an insulation resistance and capacitance measuring circuit and method based on single-pulse double-edge analysis, relates to the related field of electrical insulation online monitoring technology, and the circuit comprises a detected object and an insulation detection circuit. The insulation detection circuit comprises a controlled pulse voltage source, a coupling resistance network, a current sensor, a switch control module, a signal modulation circuit and a processor. The measuring method realized based on the circuit comprises the following steps: a pulse emitter is used to inject a common-mode voltage pulse to a transmission line of a power transmission system; pulse current response is collected in real time, a current waveform diagram is drawn, a three-point sampling method is introduced to record current values for insulation impedance parameter calculation; according to a load condition, a double-edge check method is applied based on pulse current attenuation characteristics, insulation impedance parameters, including resistive components and capacitive components, are independently calculated by analyzing a rising edge and a falling edge of the pulse current. The application realizes non-invasive synchronous monitoring of resistive and capacitive components of line-to-ground impedance, and improves detection precision.