756 results about "Resistance capacitance" patented technology

The invention discloses a continuous blood pressure monitoring method based on multiple physiological signals and an electric network and related equipment. An electric network model is constructed in advance based on the first resistor, the second resistor, the capacitor and the inductor; acquiring a physiological signal set of the user; predicting a model parameter combination of the electrical network model through the prediction model according to the signal features of the physiological signal set; the prediction model parameter combination is applied to the electric network model, a corresponding simulated blood pressure waveform is generated through simulation, and a blood pressure monitoring result of the user is determined according to the simulated blood pressure waveform. According to the method, the signal characteristics related to the blood pressure change are extracted from the multiple physiological signals, the model parameters of the electric network model are predicted, and non-invasive continuous blood pressure monitoring is achieved according to the relation between the model parameters and the blood pressure change. The multiple physiological signals can provide more comprehensive information by fully utilizing the advantages and complementary characteristics of different physiological signals, and the electrical network model can simulate the change of a cardiovascular system, so that the accuracy and reliability of continuous blood pressure monitoring are enhanced.

A system of fibers, filaments, and / or other electrically conductive materials forms an electrically conductive-to-semi-conductive yarn that can be assembled into a textile for measurement of voltage, current, resistance, capacitance, inductance, RF, and / or EM signals. Textiles are formed through weaving, knitting, lacing, and / or non-woven mechanical methods of yarn-making into 2D / 3D structures. Textile-based electrodes can be formed via folding, cutting, layering, sewing, and / or embroidering patterns to control signal transmission within / through the electrode. Multiple electrodes are positioned on a surface (e.g., a body) to sequentially or simultaneously perform multiple diagnostic modalities (e.g., electrocardiography, electromyography, electrooculography, electroencephalogram, bioelectrical impedance analysis, skin impedance analysis, and / or electrodermal activity). These modalities are multiplexed using an optimized electrode set through amplitude and frequency deconvolution and filtering algorithms to minimize the quantity of electrodes and connections on the surface while maximizing signal-to-noise ratio, differential and common mode noise rejection, and elimination of external signals (e.g., RF and EM noise).

The invention discloses a 10kV armored cable fault distance measurement method based on an additional parallel inductor, and relates to the technical field of power equipment monitoring, and the method comprises the specific steps: S100, additional inductor configuration planning: analyzing the resistance, capacitance and inductance distribution of a power distribution network line and the parameters of an expected fault current. The method effectively solves the problems that the electrical quantity is difficult to detect and the distance measurement precision is influenced by asynchronous data in the fault distance measurement of the power distribution network, and after the power distribution network line breaks down, the line runs for a period of time with the fault by controlling the combination of a protection action and an algorithm and inputting an additional inductor, so that the steady-state electrical quantity is obtained for distance measurement calculation. The method not only increases the measurement time and the amplitude of the negative sequence component, but also provides steady-state positive sequence and negative sequence electrical quantities for distance measurement, so that fault information can be extracted more accurately after a fault occurs.

The invention relates to an FOC control method based on an automobile air conditioner module motor without a Hall sensor, and belongs to the technical field of automobile electronics. The method comprises the following steps: injecting double-frequency voltage pulses into a stator in stages to position a rotor; collecting current through a sampling resistor and filtering to construct a rotor flux linkage distribution model, and presetting rectangular axis current in combination with noise reduction of a miniature acoustic sensor and air speed gear of an air conditioner; an extended Kalman filter observer is adopted to reversely deduce the load torque, and the torque change rate is monitored to trigger instantaneous load impact protection; the voltage space vector amplitude is corrected through voltage feed-forward compensation, a resistor-capacitor series filter circuit is additionally arranged, and phase dislocation pulse width modulation is adopted for resisting interference; and establishing a motor efficiency-rotating speed-load three-dimensional optimization method, starting dynamic flux-weakening control, and estimating the winding temperature through the stator resistance to adjust the flux-weakening depth. Accurate starting and dynamic load adaptation of the Hall-sensor-free motor are achieved, starting out-of-step and noise exceeding are avoided, and stable air volume of an automobile air conditioner and long-term reliable operation of the motor are guaranteed.

A method for estimating current-dependent non-linear equivalent circuit model (ECM) parameters of a battery may include measuring a battery voltage across terminals of the battery and a battery current drawn from the battery, deriving linear ECM parameters for modeling a linear ECM of the battery with multiple resistive-capacitive elements with different time constants to characterize temporal behaviors of the battery, continuously tracking an impedance for each of the multiple resistive-capacitive elements and an open circuit voltage of the battery, continuously monitoring the battery current to detect high current events, continuously tracking a deviation for each of the multiple resistive-capacitive elements during the high current events, and deriving non-linear online ECM parameters based on the linear ECM parameters and the deviations for the multiple resistive-capacitive elements during the high current events.

The application discloses a preparation method of a resistance / capacitance dual-response MXene-based hydrogel flexible sensor, and the hydrogel flexible sensor is prepared by combining a microstructure hydrogel prepared from polyacrylamide, gelatin and MXene with an interdigital electrode. The hydrogel flexible sensor can simultaneously detect resistance response signals and capacitance response signals. The detected resistance and capacitance signals are complementary to each other, the single response signal mode of the flexible sensor is widened, the mutual calibration of the same group of data is realized, and the detection precision of the flexible sensor is improved. The MXene-based hydrogel flexible sensor is applied to the detection of human biological signals, for example, carotid artery pulse detection and radial artery pulse detection.

The utility model discloses a gallium nitride driving circuit and a switching power supply. The gallium nitride driving circuit comprises a resistor R1, a capacitor C1, a voltage-regulator tube D1, a voltage-regulator tube D2, a driving signal input port Vgate, a driving signal output port Vgs and a grounding port GND. The driving signal input port Vgate is simultaneously connected with one end of the resistor R1 and one end of the capacitor C1, the other end of the resistor R1, the other end of the capacitor C1 and the cathode of the voltage-regulator tube D1 are simultaneously connected with the driving signal output port Vgs, the anode of the voltage-regulator tube D1 is connected with the anode of the voltage-regulator tube D2, and the cathode of the voltage-regulator tube D2 is connected with the grounding port GND; wherein the gallium nitride driving circuit further comprises a voltage limiting clamping circuit which is connected between the driving signal output port Vgs and the grounding port GND, and the voltage limiting clamping circuit is used for limiting a driving output signal of the driving signal output port Vgs within the withstand voltage of a gate electrode and a source electrode of the gallium nitride power tube. The reliability of the switching power supply can be improved.

The invention relates to the technical field of on-line monitoring, in particular to an insulation fault on-line monitoring method and system for a medical IT system control cabinet. The method comprises the following steps: selecting a non-integer frequency multiplication detection frequency according to equivalent ground distributed capacitance in a previous monitoring period, and superposing the non-integer frequency multiplication detection frequency with a fundamental frequency to form a composite signal injection system; collecting signals to calculate a voltage instantaneous harmonic distortion rate change gradient, and selecting a time window to split the leakage current according to the change gradient; on the basis of dispersion estimation signal-to-noise ratio weighted fusion current vectors, insulation resistance and distributed capacitance are calculated; constructing a four-dimensional original feature vector composed of the insulation parameter, the phase difference and the intermodulation component energy; constructing a diagonal weighting matrix based on the resistance-capacitance ratio and the gradient to transform a feature vector, and determining the fault attribution through the Mahalanobis distance calculation with the fault template library. According to the scheme, harmonic interference can be avoided, calculation stability can be improved, insulation instantaneous sudden change can be quickly responded, and different fault types can be accurately distinguished to guide maintenance.

The invention discloses a high-precision integrated temperature and humidity sensor and a construction method. The sensor comprises an MEMS humidity capacitance sensor, a CMOS integrated temperature sensor, an analog-to-digital converter, a calibration configuration information storage array and a digital interface. Wherein the MEMS humidity capacitance sensor and the CMOS integrated temperature sensor are respectively connected with the analog-to-digital converter, and voltage signals of the MEMS humidity capacitance sensor and the CMOS integrated temperature sensor are converted into digital signals; the analog-to-digital converter transmits the digital signal to the calibration configuration information storage array for data processing and linearization processing, and transmits the data to the SDAamp through a digital interface; in SCL; wherein the MEMS humidity capacitance sensor comprises a capacitance pole plate, a protection ring and a heating resistor; the capacitor plates adopt an interdigital capacitor structure and have a regular octagonal part in overlook observation, and meanwhile, the upper and lower electrode plates and the polyimide PI material layer between the two electrode plates form the interdigital capacitor structure.

The invention discloses a state of health (SOH) prediction method for a super-capacitor system, and the method comprises the steps: obtaining a plurality of pieces of discharge segment data according to the historical charge and discharge data of the super-capacitor system under a real operation condition; identifying equivalent parameters of the data of each discharge segment through a resistance-capacitance equivalent model to obtain equivalent capacitance corresponding to each discharge segment; carrying out capacitance value calibration according to the equivalent capacitance corresponding to each discharge segment so as to obtain capacitance value labels of different historical preset time periods; constructing an SOH track smooth curve according to the capacitance value labels of different historical preset time periods; performing prediction model training according to the SOH trajectory smooth curve to obtain an SOH prediction model; and predicting the health state of the super-capacitor system by using the SOH prediction model. The method can accurately predict the health state of the supercapacitor system in the electrified traffic system carrying tool and the renewable energy system in actual operation, and improves the operation safety and economic benefits of the electrified traffic system carrying tool and the renewable energy system.

Provided are a battery pack and an energy storage system. The battery pack comprises a battery bank, a DC / DC converter, a controller and a voltage-stabilizing circuit, wherein the voltage-stabilizing circuit comprises a resistor, a capacitor, a first switch and a second switch; a positive-electrode port of the DC / DC converter and one end of the capacitor are connected to a positive electrode of the battery bank by means of the first switch, a negative-electrode port of the DC / DC converter and the other end of the capacitor are connected to a negative electrode of the battery bank by means of the resistor, and the negative-electrode port and the other end of the battery-side capacitor are connected to the negative electrode of the battery bank by means of the second switch; and the controller is used for controlling the turn-on of the first switch, controlling the turn-on of the second switch after a preset condition is met, and controlling the DC / DC converter, and a voltage across the two ends of the capacitor when the preset condition is met is greater than a voltage across the two ends of the capacitor when the preset condition is not met. Thus, a second switch is turned on after a preset condition is met, such that a control delay of a DC / DC converter can be reduced.

The invention discloses a classification code and description code combination-based electronic material coding method and system, and the method comprises the steps: formulating an 11-bit pure digital coding rule, taking the first three bits as classification codes, and distinguishing the paster / plug-in packaging, basic types and specific types of materials; the last eight bits are description codes and are divided into two types according to material characteristics: for materials with nominal values, such as resistors and capacitors, nominal value codes converted based on a scientific counting method are combined with conventional attribute codes of precision, packaging and the like; for materials without nominal values, such as chips, PCB finished products and the like, the combination of model codes and serial number codes is adopted; a classification code and a description code are automatically generated by analyzing the BOM and are compared with a database to process conflicts. According to the method, the coding rule has intuition and uniqueness, the problems that traditional serial number coding is poor in readability and prone to code repetition are effectively solved, and the efficiency and accuracy of electronic material management are remarkably improved.

The invention discloses a 10kV power system overvoltage protection and optimization method based on an EMTP simulation technology, and the method comprises the steps: constructing a multi-layer simulation model, and carrying out the simulation analysis; modeling and predicting the overvoltage trend of the power system by collecting simulation data and utilizing a machine learning algorithm; in the simulation process, cable modeling parameters including resistance, capacitance and inductance are dynamically updated in real time, and the actual operation state of the cable is simulated; based on a high-frequency transient electromagnetic interference signal detected in real time, an interference elimination scheme is automatically generated and adjusted; performing parallel operation on the simulation scene by adopting quantum calculation, and synchronously performing overvoltage protection optimization; and summarizing and optimizing the simulation data to generate an improved protection scheme. According to the invention, the anti-interference capability and the operation reliability of the power system are obviously improved, the safe operation of the system in various complex operation scenes is ensured, the service life of power equipment is effectively prolonged, and the operation fault risk is reduced.

The invention discloses a novel heterogeneous neuron memristor coupling model and circuit. A resistor, a capacitor, a triode, an operational amplifier, a multiplier, a direct current voltage source and a direct current source construct five circuit paths, namely a hyperbolic tangent simulation equivalent circuit and a hyperbolic tangent memristor simulation equivalent circuit. The calculation result of the coupling network shows that the network does not have a balance point, and the network shows hidden dynamic behaviors. The coupling network can generate five stable discharge modes such as periodic peak, chaotic peak, random bursting, chaotic bursting and periodic bursting. Due to the fact that different discharging modes can control the system to show different behavior modes, the circuit has important value for development of a bionic system.

The invention discloses a primary side switch control circuit based on a tapped transformer. The primary side switch control circuit comprises a plurality of operational amplifiers, a plurality of triodes, a plurality of resistors and a capacitor. A first pin and a fourth pin of a trigger U1, a first pin and a fourth pin of a trigger U4, a collector electrode of a triode Q2, a collector electrode of a triode Q3 and one end of a resistor R1 in the operational amplifiers are connected with a power supply; a second pin and a sixth pin of the trigger U1, an input end of the phase inverter U2 and a base electrode of the triode Q1 are connected, a third pin is connected with an emitting electrode of the triode Q2, an emitting electrode of the triode Q3 and one end of the resistor R6, and a fifth pin is connected with a third pin of the trigger U4; the in-phase end of the operational amplifier U3 is connected with one end of the resistor R2, one end of the capacitor C2 and the anti-phase end of the operational amplifier U6, and the output end is connected with the base electrode of the triode Q2; a second pin and a sixth pin of the trigger U4 are connected with a first input end of the AND gate U5, and a fifth pin of the trigger U4 is connected with a first input end of the AND gate U7.

The invention relates to a voltage output method and system based on a high-voltage power supply widening controller, and belongs to the technical field of high-voltage power supplies. The method comprises the following steps: acquiring a wide-range voltage parameter, and dividing a frequency control region and a pulse width modulation control region of a high-voltage power supply through an arbitration control algorithm to obtain switching judgment information of a power supply working region; constructing a working area switching logic according to the resistance-capacitance network, executing the working area switching logic through a frequency pulse correlation algorithm, coordinating the pulse width and the working frequency, and generating a double-modulation execution signal; a closed-loop negative feedback mechanism is established, and a wide-range overvoltage-free voltage regulation and control instruction is obtained by combining a proportional-integral compensation circuit with a resistance measurement full-right control working frequency and a pulse width; and broadening the output voltage range and inhibiting the overshoot voltage through power supply power driving, coordinating the working frequency and the pulse width in combination with the wide-range overvoltage-free voltage regulation and control instruction, and outputting the wide-range voltage of the high-voltage power supply.

The invention discloses a voltage and current synchronous measurement method for a high-voltage power supply of a fusion device, which is suitable for accurately sampling and monitoring voltage and current signals of each key node of the high-voltage power supply of the fusion device. According to the method, firstly, a resistance-capacitance voltage division technology is adopted, a front-end high-voltage attenuation network is constructed by utilizing high-precision resistors and capacitors, and stable voltage division and linear attenuation of high-voltage signals are achieved; then, electrical isolation is realized through a small-signal voltage and current transformer, and multi-channel synchronous acquisition of voltage and current signals is completed respectively. Then, the ADC module adopts two multi-channel AC sampling special electric energy metering chips to realize ten-channel synchronous acquisition of high voltage and current signals. And finally, the FPGA receives, processes and analyzes the acquired data in real time, and transmits a result to an upper computer monitoring platform. According to the method, the synchronism, the precision and the anti-interference performance of a fusion power supply high-voltage measurement system are remarkably improved, and reliable data support is provided for safe and stable operation of a fusion device.

The application belongs to the technical field of electronic component recycling, in particular to a waste electronic component recycling device, which comprises a workbench, a clamping assembly is arranged on the upper end of the workbench, the clamping assembly comprises a first rectangular plate which is slidably arranged on the upper end of the workbench, two clamping strips are slidably arranged on the upper end of the first rectangular plate, a cylinder is slidably arranged on one side of the upper end of the first rectangular plate, a through hole is formed in the lower end of the cylinder, a hot air blower is arranged on one side of the cylinder, a baffle is arranged on the middle of the upper end of the workbench, a crushing box is arranged on one side of the workbench, an extrusion roller is rotatably arranged in the crushing box, and a discharge port is arranged on one side of the lower end of the crushing box. The device can automatically remove the resistors, capacitors and other components on the surface of the circuit board by using the heating separation method, without damaging the circuit board and the resistors, capacitors and other components, thereby reducing the harm of harmful substances to the environment.

Various embodiments of the present disclosure are directed towards an integrated circuit (IC) in which cavities separate wires of an interconnect structure. For example, a conductive feature overlies a substrate, and an intermetal dielectric (IMD) layer overlies the conductive feature. A first wire and a second wire neighbor in the IMD layer and respectively have a first sidewall and a second sidewall that face each other while being separated from each other by the IMD layer. Further, the first wire overlies and borders the conductive feature. A first cavity and a second cavity further separate the first and second sidewalls from each other. The first cavity separates the first sidewall from the IMD layer, and the second cavity separates the second sidewall from the IMD layer. The cavities reduce parasitic capacitance between the first and second wires and hence resistance-capacitance (RC) delay that degrades IC performance.

The invention relates to the technical field of display, particularly provides a display panel and a preparation method thereof, and a display device, and aims to solve the problem that the color of the edge and the middle area of the display panel is not uniform due to an FIP scheme. To this end, the display panel of the present application comprises: a substrate; the plurality of functional layers on the substrate comprise a plurality of data lines which are arranged at intervals along a first direction and extend along a second direction crossed with the first direction, and the data lines comprise a first type of data lines and a second type of data lines; the connecting lines are located in the display area, and each connecting line comprises a first connecting part extending in the first direction and a second connecting part extending in the second direction; and the compensation structure is used for reducing the resistance and capacitance load difference on the second type of data lines and the first type of data lines. According to the display panel, the compensation structure is introduced to perform capacitance compensation on the non-FIP area, so that the resistance and capacitance load of the display panel is balanced, the color and the brightness of the display panel are uniform, and the display effect is improved.

The invention provides a resistor and capacitor measuring circuit and method, and relates to the technical field of resistor and capacitor measurement, and the resistor and capacitor measuring circuit comprises a switch S1, a switch S2, a switch S3, a switch S4, a switch S5, a switch S6, a reference capacitor CREF, a capacitor CTEST to be measured, a reference resistor RREF, a resistor RTEST to be measured, a Schmitt trigger u1, a time-to-digital converter TDC and a microprocessor muC. And the Schmitt trigger u1, the time-to-digital converter TDC and the microprocessor muC are sequentially connected in series. According to the resistor-capacitor measuring circuit and method, the discharge time of the reference resistor-capacitor and the discharge time of the resistor-capacitor to be measured are respectively measured through the time-to-digital converter, the time proportion is calculated, and the parameters of the resistor-capacitor to be measured and the resistor-capacitor to be measured are calculated and reversely deduced by combining the known reference capacitor and the resistor. The correction compensation amount is obtained through an additional measurement state, and then the measurement result is corrected, so that the influence of the conduction loss of the switch on the measurement result is greatly reduced.

The invention belongs to the technical field of integrated circuits, and particularly relates to a radio frequency amplifier bandwidth expansion circuit based on resistor-capacitor series feedback. The bandwidth expansion circuit comprises a first-stage common-gate amplifier, a second-stage common-source amplifier, a transformer-based inter-stage matching network between the two stages of amplifiers, and two resistor-capacitor series feedback paths, and a resistor-capacitor series feedback path is bridged at two sides of the interstage matching network, and feedback is introduced from the output end of the common source amplifier to the output end of the common gate amplifier, so that the quality factors of two resonant cavities of the interstage matching transformer are adjusted, and the targets of adjusting the gain of the amplifier and expanding the bandwidth of the radio frequency amplifier are further realized.

The invention relates to the technical field of radio frequency integrated circuits, and discloses a low-noise voltage-controlled oscillator circuit which comprises a source electrode following low-noise bias circuit with digital calibration, a source electrode following low-noise bias circuit with digital calibration, a source electrode following low-noise bias circuit with digital calibration and a source electrode following low-noise bias circuit with digital calibration, the cross-coupled amplifier array is composed of a plurality of units, and the source electrode of the cross-coupled amplifier array suppresses low-frequency noise through a resistance-capacitance feedback network and receives a digital amplitude calibration signal so as to dynamically adjust the number of working units and stabilize the output amplitude; the amplitude self-calibration loop consists of digital logic and a peak detector; the switched capacitor unit array is provided with stable direct-current bias; and a wide linear variable capacitor array driven by the stepped bias voltage. Through deep fusion of digital and analog technologies, the phase noise is remarkably reduced, the linear tuning range is widened, the amplitude stability is ensured, the power consumption is reduced, and the method is particularly suitable for a high-performance radio frequency communication chip of the Internet of Things.

The invention discloses an electrolytic capacitor pin defect detection device, and relates to the field of electrolytic capacitor pin detection.The electrolytic capacitor pin defect detection device comprises an equipment frame body, a conveying assembly is arranged in the equipment frame body, and the conveying assembly comprises a driving roller and a driven roller which are installed in the equipment frame body; the outer wall of the driving roller and the outer wall of the driven roller are each sleeved with a rotating roller and a chain wheel, a motor is arranged at one end of the driving roller, a chain is arranged on the outer wall of the chain wheel, the outer walls of the rotating rollers are sleeved with a conveying belt, and a stirring assembly is arranged on one side of the chain. The problem that the detection work efficiency is low when an existing resistor capacitor is detected is solved, the resistor capacitor is placed above the rolling wheels, the stirring assembly can correct the resistor capacitor, the pin of the resistor capacitor is in a horizontal state, and the detection efficiency of the resistor capacitor is improved. Whether the resistor and capacitor pins have flaws is judged by observing the universal meter, and the resistor and the capacitor do not need to be manually taken for detection, so that the working efficiency is improved.

The embodiment of the invention provides a method and a system for charging a bootstrap capacitor of an electric compressor controller. The method comprises the following steps: S1, calculating time required for fully charging the bootstrap capacitor according to resistance and capacitance values of a bootstrap charging circuit; s2, the minimum duty ratio is set based on the driving control frequency of the controller, and the single switching charging duration of the bootstrap capacitor is calculated; s3, working time of low-voltage side switch tubes in the three single-phase half-bridge units is calculated; and S4, controlling the bootstrap capacitor of the corresponding single-phase half-bridge unit to be charged to a required voltage value. Relates to the field of new energy automobile electric compressors. The time required for fully charging the bootstrap capacitor is accurately calculated according to the resistance and capacitance values of the bootstrap charging circuit, so that the charging efficiency and the driving stability of the high-voltage side switching tube are improved, and the bootstrap charging circuit is particularly suitable for reliable operation of a new energy truck in frequent start-stop and high-load scenes.

The invention belongs to the field of integrated circuit power supply chip design, and particularly relates to an overshoot and undershoot suppression transient enhancement circuit applied to an LDO (Low Dropout Regulator), which consists of a band-gap reference circuit, an error amplifier, a power tube PMOS (P-channel Metal Oxide Semiconductor) tube MP1, a second-stage amplifier tube NMOS (N-channel Metal Oxide Semiconductor) tube MN1, a resistor R4, a load resistor RL and an on-chip load capacitor CL, the self-adaptive zero point module consists of a resistor R3, a capacitor C1 and an NMOS (N-channel Metal Oxide Semiconductor) tube MN2, the LDO feedback network consists of a resistor R1 and a resistor R2, and the module is used for inhibiting output voltage uprush and downrush. According to the invention, through the upshoot suppression circuit and the undershoot suppression circuit, effective suppression of upshoot and undershoot generated during load sudden change is realized, the recovery time of upshoot and undershoot voltage is shortened, and the upshoot suppression circuit only generates a small amount of quiescent current consumption; the undershoot suppression circuit does not generate extra static consumption under the whole LDO working state due to the effect of the capacitor.

The invention discloses an automatic detection and automatic aging loading and unloading device for surface-mounted resistors and capacitors, and relates to an aging test device. The device comprises a platform frame, parallel guide rails, a vertical guide rail, a suction head device, a resistance-capacitance test plate, an LCR capacitance tester, an electric feeder and an aging tool plate, the two parallel guide rails are installed on the two sides of the platform frame in parallel, and the vertical guide rail is installed on the two parallel guide rails and is perpendicular to the parallel guide rails; the suction head device is mounted on the vertical guide rail; the resistance-capacitance test board is installed at the front end of the platform frame, and the LCR capacitance tester is connected with the resistance-capacitance test board through a wire. The electric feeder is arranged at the front end of the platform frame; the aging tool plate is placed at the middle rear position of the platform frame; the CCD camera can realize accurate identification of positions of the device and the aging test electrode, the electromagnetic valve controls on-off of airflow, adsorption and separation of the device by the suction nozzle are realized, and the device is placed on the resistance-capacitance test plate for performance parameter test. The operation process does not need personnel participation, the working intensity of personnel is reduced, and the efficiency is improved.

The invention relates to a non-contact conductivity measuring device which comprises an RLC (Radio Link Control) circuit, a signal generator, an oscilloscope and a calculation module, wherein the RLC circuit is formed by connecting a resistor, a capacitor and an inductor in series; the inductor consists of a solenoid and a conductor rod arranged in the center of the solenoid; the signal generator serves as an input voltage source of the RLC circuit; the oscilloscope is used for monitoring voltage signals at two ends of the capacitor and voltage signals at two ends of the input voltage source; the calculation module is used for obtaining the resonant frequency of the RLC circuit according to the ratio of the voltage signals at the two ends of the capacitor to the voltage signals at the two ends of the input voltage source; and the controller is also used for calculating the conductivity of the to-be-measured conductor rod according to the outer radius of the to-be-measured conductor rod, the outer radius of the solenoid, the length of the solenoid, the number of close winding turns of the solenoid, the capacitance value of the capacitor and the resonance frequency. It can be understood that by means of the technical scheme, the conductivity of the conductor rod can be measured in a non-contact mode, and the testing accuracy is high.

The invention discloses a circuit and a method for demodulating current received by an instrument bus host, and relates to the technical field of instruments. The current demodulation circuit comprises an adder, the first input end of the adder is connected with an instrument bus MBUS to receive MBUS signals, the second input end of the adder receives reference voltage signals, and the output end of the adder outputs summing voltage signals; the resistor and capacitor charging and discharging device is connected with the output end of the summator so as to process the summing voltage signal; and the reverse input end of the comparator receives the MBUS signal, and the positive input end of the comparator receives the summing voltage signal processed by the resistor-capacitor charging and discharging device so as to determine the logic level corresponding to the MBUS signal based on the signal level of the output end of the comparator. According to the invention, the problem that the MBUS host receiving circuit cannot be compatible with all MBUS meters is solved.

The utility model discloses an anti-static liquid crystal display module, which is characterized in that a driving IC (integrated circuit) is arranged on the display module, and the display module is connected with an FPC (flexible printed circuit) through the driving IC; the electronic component area is arranged on the FPC and is used for driving a resistor, a capacitor and a diode required by an IC (integrated circuit) in a patch manner; the first copper leakage area surrounds the periphery of the electronic component area and is arranged on the FPC; and the anti-static element is arranged on the electronic component area and is matched with the first copper leakage area to form anti-static protection for electronic components in the electronic component area. According to the anti-static liquid crystal display module, the insulating film is firstly attached to the surface of the electronic component area, the first copper foil with a certain thickness is attached to the insulating film, and the periphery of the first copper foil makes contact with the exposed copper on the periphery of the component area on the FPC. Therefore, the generated static electricity is conducted through the first copper foil and guided into a static electricity release network of the display module through the FPC leakage copper, the static electricity blocking and releasing effects are achieved, and an electronic component area is effectively protected.