40 results about "Electric intensity" patented technology

A non-invasive component concentration measuring device capable of an accurate measurement by tracking a change in the sensitivity characteristics of a photo-acoustic signal detector to always allow measurement at high-sensitivity frequency, and a method of controlling a component concentration measuring device. The component concentration measuring device is characterized by comprising a light generating means for generating two-wave lights having different wavelengths, a light modulating means for electrically intensity-modulating respective two-wave lights having different wavelengths at the same frequency by an inverse-phase signal, a light outputting means for outputting the intensity-modulated two-wave lights having different wavelengths toward a specimen, and a sound wave detecting means for detecting a sound wave produced in the specimen by output lights.

There is provided a wireless measuring apparatus that efficiently measures the frequency characteristics of a sensor unit mounted on an object to be measured. The wireless measuring apparatus is a wireless measuring apparatus that measures the frequency characteristics of a sensor unit (10) mounted on an object (40) to be measured, including the sensor unit (10) having a piezo-resonator (11), an antenna (20) that forms a circuitry with the sensor unit (10), and a measuring element (30) that supplies high frequency electricity changed in different frequency to the circuitry and measures the frequency characteristics of the reflected electricity strength received from the circuitry.

The invention discloses a method for manufacturing an extra-high-voltage composite insulation paper board. The method comprises the following steps that 1) stem grafting modification is conducted on aramid fiber pulp; 2) an aramid paper board is manufactured. The high-temperature (220 DEG C) resistant performance of aramid fiber is utilized, so that the temperature which the insulation paper board is resistant to is increased to 140 DEG C-150 DEG C; the low dielectric constant of the aramid fiber ranges from 1.6 to 3.7 so that the partial discharge of extra-high-voltage transformer oil can be reduced, the electric intensity of the extra-high-voltage transformer oil and paper insulation are completely used, and the dielectric constant of the paper is reduced. The surface modification technology is conducted on the aramid fiber so that the aramid fiber can be completely merged with wood pulp fiber.

A device using an electrorheological fluid to detect the DC electric field intensity mainly comprises a support, a sealed container, the electrorheological fluid, a built in slide rail, a through hole, a built in pipe, a work ball, a reflection film, a laser emission and reception device, a wire and a solenoid valve; when the device is in an external electric field, the electrorheological fluid viscosity and fluidity change, thus causing the motion state of the moving work ball to change, and finally causing different laser emission and reception device output times. The output time is transmitted to an industrial control computer, and t-E matching is carried out between the output time and a storage database, thus detecting the external electric field intensity applied on the electrorheological fluid. The method is fast in response speed, stable in results, simple in structure, low in cost, and not limited by sizes.

The invention discloses a device and a method for recovering metal from a fine-grained broken product of a waste circuit board, and belongs to the field of resource recovery of waste circuit boards. Valuable metals are recovered from fine-grained broken products of waste circuit boards by utilizing triboelectric charges and charge attenuation characteristic differences of organic components, inorganic components and metal components in the broken products of the waste circuit boards and adopting a triboelectric separation method. The method comprises the following steps that: frictional chargeamong particles is strengthened by virtue of a mechanical stirring type frictional charge device; the particles enter an electric field after being fully tribbed and charged; the organic components and the inorganic components carry opposite charges and respectively move towards two sides of an electric field under the action of horizontal electric field force; the metal particles are weak in charge intensity and fast in charge disappearance, are slightly affected by horizontal electric field force after entering an electric field and fall into a material collecting groove in the middle of the electric field under the action of gravity, and finally, separation of organic components, inorganic components and metal components is achieved.

The invention provides a single factor atmospheric polarization modeling method based on Rayleigh scattering, comprising the following steps: selecting the observation point and establishing a celestial coordinate system and obtaining the current time sun position using the observation time and observation point geographic coordinate; selecting any point to be measured on the celestial sphere surface and solely determining a northeast coordinate system based on the current time sun position using the point to be measured as the coordinate origin; in the northeast coordinate system, decomposing the incidence natural light into two beams of linearly polarized light in same intensity, vertical electric-field vibration direction, no fixed phase relation, and computing the scattered light electric field strength component under linearly polarized light incidence. The method uses the electric intensity vector to describe light wave and uses the vector size of the scattered light electric field strength component to obtain the polarization degree of the point to be measured and uses the vector direction of the scattered light electric field strength component to obtain the polarization direction of the point to be measured, thus the distributed model of the all-day atmospheric polarization information is obtained and the accuracy and the expansibility of the atmospheric polarization model is increased.

The invention provides an extra-high voltage alternating current non-contact multi-channel electricity testing method. The method comprises self-checking, pre-checking, multi-channel checking, comparison and alarming stages and the following steps of: after self-checking is passed and time delay is performed, performing detection by using a parallel plate capacitance sensing principle and double channels; acquiring data of a horizontal channel and a vertical channel at a certain frequency; comparing the electric intensity values of the working positions of tested objects acquired from the two channels; taking a larger current intensity value as an electricity testing value; putting the tested objects at lower positions to measure the current intensity values of the two passages by the same method; taking a larger current intensity value as an alarm threshold; testing electricity according to the field intensity curve and variation trend of a space electric field; and reflecting the magnitude of an electric field through sound and light alarm signals. The method can effectively eliminate the disturbance of neighboring electrified equipment and solves the problems of poor repeatability and low correctness of an electricity testing result caused by the strong disturbance of an electrified body adjacent to tested equipment on space field intensity.

In an image forming apparatus, an exposure device performs exposure on a non-image area of image pattern, performs an exposure on the image area in an exposure amount lower than the non-image area or does not perform exposure, and an exposure amount control device controls, with respect to pixels having the same density data, an exposure amount given by an exposure device to be smaller in a first portion, which is a thin-line of a width that is equal to or less than a predetermined number of pixels or which is an isolated dot of widths that are equal to or less than the predetermined number of pixels in two directions substantially orthogonal to each other, than in a second portion which is a line of a width exceeding the predetermined number or a surface of widths that exceed the predetermined number in two directions substantially orthogonal to each other.

A luminescent material for electro-optical sources, involving a luminescent material containing nanoscale metal oxides for electro-optical sources, comprising 35-45 wt.% of carbonates, 5-10 wt.% of silicates, 15-25 wt.% of halides, 25-35 wt.% of nanoscle metal oxide powders, 2-4 wt.% of nitrates and 5-7 wt.% of nanoscale rare-earth elements. Since the material in this invention is a compound and doped material, the luminescence property of the material is largely altered. Due to the tunneling effect, electrons can realize transition between the interfaces of the insulating layer and the luminescent layer. When the electrons stop transition at the interface of the insulating layer and the luminescent layer, polarization occurs, and the polarized electric field is superimposed with the applied electric field to strengthen the electric intensity of the luminescent layer. The luminescent material in this invention has such advantages as high brightness, high optical efficiency, good coloration, low energy consumption, good adaptability, high response speed and long service life.

The invention relates to an insulating test piece and a test electrode device using the same. The insulating test piece comprises a base body (1) made of a insulating material to be tested, a first holding groove (5) for matching and holding a high-voltage test electrode (3) is arranged on one side of the base body, a second holding groove (6) for matching and holding a low-voltage test electrode (4) is arranged on the other side, opposite to the first holding groove, of the base body, and an inter-groove insulating part (2) integrated with the base body is arranged between the first holding groove and the second holding groove. Compared with a traditional insulating material electric intensity test method, the local discharge of the material surface is reduced, the test result is more accurate, the test environment of the invention is consistent with the actual operation environment of the electric equipment, and the test result has more practical guiding significance.

The invention provides a module for testing the dielectric strength of an automotive relay, which comprises a dielectric strength tester. The module is characterized by also comprising a high-voltage control module; and the high-voltage control module comprises a programmable control circuit, a high-voltage end switch and a low-voltage end switch, wherein the dielectric strength tester outputs high voltage and returns to the output low-voltage end of the dielectric strength tester through the high-voltage end switch, the automotive relay and the low-voltage end switch; the control of the programmable control circuit on the high-voltage end switch, the automotive relay, the low-voltage end switch and the dielectric strength tester comprises the following steps of: starting the dielectric strength tester to output high voltage, controlling the high-voltage end switch and the low-voltage end switch to complete the testing requirement of the dielectric strength of different connecting parts of the automotive relay, cutting off the dielectric strength tester to output the high voltage after the test is finished, and cutting off the high-voltage end switch and the low-voltage end switch.

The invention relates to a circulating frictional electrostatic precipitation device which comprises a first electrostatic precipitation chamber, a second electrostatic precipitation chamber, a frictional electrifier, a centrifugal fan, a first single-pole double-throw switch, a second single-pole double-throw switch and the like. By means of the cooperative frictional electrification of the specially designed frictional electrifier and a fan impeller, the circulating frictional electrostatic precipitation device increases the efficiency of frictional electrification; by adjusting valves, theratio of circulating gas volume to gas treatment capacity can be controlled, consequently, the residence time of dusty gas stays in the device is regulated, the intensity of electrification is regulated, and thereby the dust precipitation efficiency of the device is controlled; the continuous operation of the device is ensured by two electrostatic precipitators; compared with the energy consumption of electric field electrification, the energy consumption is low.

A local stimulation method of a predetermined region of brain tissue, the brain tissue including at least GABAergic neuron type. The method includes at least one activation step of a set of bipolar electrodes, according to a predetermined electric intensity and a predetermined biphasic pulse frequency, delivering a predetermined electric field. The predetermined electric field induces an activation of the GABAergic type neurons and a virtual absence of activation of other types of neurons.

The invention discloses a weak magnetic flow detector. The detector comprises a flux induction module, a first amplification module, a second amplification module, a controller and a network module, wherein the flux induction module is arranged in a measured magnetic flow environment, and used for converting a magnetic intensity signal into an electric intensity signal; the first amplification module is connected with the flux induction module, and used for stabilizing the voltage value of the electric intensity signal in a fixed amplitude; the second amplification module is connected with the first amplification module, and used for carrying out impedance matching on the electric intensity signal after amplitude is stabilized; the controller is respectively connected with the first amplification module, the second amplification module and the network module; and the controller is used for controlling the voltage stabilizing amplitude of the first amplification module, receiving the electric intensity signal which is subjected to impedance matching by the second amplification module, and transmitting the electric intensity signal to the network module. The method has the advantages of strong interference resistance, long-distance transmission availability and the like since an automatic gain amplifier is introduced to stabilize output signals.

Method and practical use system for measuring the imbalance potential of an electrical installation or system comprising:i) acquiring instantaneous values of voltage (vA, vB, vC) and electrical intensity (iA, iB, iC) of each of the phases A, B, C of the installation, and breaking them down into their fundamental frequency components (vA1, vB1, vC1), (iA1, iB1, iC1);ii) obtaining effective voltage and intensity values and angles for initial phase difference between voltage and intensity, and, starting from these effective values obtaining active powers (PA, PB, PC) and reactive (QA, QB, QC) potentials for each of the phases;iii) from the active and reactive potentials, obtaining (4) a phasor imbalance potentials (ĀU) according to the following expression:ĀU=√{square root over (2)}( <o ostyle="single">p< / o>·|PA+a2PB+aPC|+ <o ostyle="single">q< / o>·|QA+a2QB+aQC|)where a=1|120° and p and q are orthogonal unit phasors.The invention also relates to a device for calibrating (21) instruments for measurement instruments of this imbalance power.

The invention relates to an automatic tracking and control system of electric field strength, which is mainly technically characterized by comprising a single chip microcomputer, an electric field strength acquisition circuit, a motor driven control circuit, an analog-to-digital conversion circuit, a digital-to-analog conversion circuit, a keyboard and a display screen, wherein the single chip microcomputer is connected with the analog-to-digital conversion circuit, the digital-to-analog conversion circuit, the keyboard and the display screen through I / O interfaces, the other end of the analog-to-digital conversion circuit is connected with an output terminal of the electric field strength acquisition circuit, and an output terminal of the digital-to-analog conversion circuit is connected with the motor driven control circuit. The automatic tracking and control system is capable of automatic acquiring electric field strength signals and automatically controlling the motor, thereby increasing the automation level of production, increasing the production efficiency, increasing the qualified rate of production, and increasing the market competitiveness of products.

The invention relates to a DC long-term live-line test method and a critical DC electric intensity determination method thereof. Under the DC condition, no relevant standards, no corresponding test method and no evaluation system for endurance of epoxy type electrical insulating materials exist in the prior art, and electric life evaluation of the electrical insulating materials under the DC voltage condition has no clear way. The method is a DC long-term live-line test and electric life evaluation method suitable for the epoxy type electrical insulating materials. According to the method, material sample dimension, loading voltage, loading time, intermediate parameter measurement mode, extrapolation curve drafting, life determination bases are prescribed, important bases are provided for endurance and electric life evaluation of the electrical insulating materials under the DC voltage condition, and thereby technical support is provided for integral life evaluation of electric power equipment.

The invention relates to the technical field of electric field intensity measurement, and particularly provides a method and a device for measuring the electric field intensity in a strong electric field. Firstly, the electric field is closed, tentative point charges are balanced at spatial positions in need of electric field intensity measurement in the electric field through at least three tensometers, and the initial tension values of the multiple tensometers are recorded respectively; then, the electric field is started again, the tension sizes of the tensometers are adjusted to enable the tentative point charges to be in a balanced state again in the original positions, and the real-time tension values of the multiple tensometers are recorded respectively; the difference between the real-time tension value and the initial tension value of each tensometer is calculated, the tension difference is obtained, the joint force of multiple tension differences is then calculated, the electric field force F at the measured spatial position is obtained, and the electric field intensity of the measured spatial position is calculated according to the electric field force F. Thus, the high-precision electric field intensity in the strong electric field is acquired.

The invention relates to an ultra-long distance lightning intensity inversion algorithm considering the influence of the earth curvature radius, and the algorithm comprises the steps: carrying out the normalization of lightning signals at different distances from an observation point to a preset distance according to the propagation law of a lightning electromagnetic field along the earth surface; if the distance between the lightning signal and the observation point is greater than 200km, setting the attenuation rule of the electric field amplitude EPEAK of the lightning signal as d-1.32 along with the increase of the observation distance d; if the distance between the lightning signal and the observation point is less than 200km, setting the attenuation rule of the electric field amplitude EPEAK of the lightning signal as d-1 along with the increase of the observation distance d; when thunder and lightning occur, acquiring a magnetic field intensity peak value of the thunder and lightning at the observation point; and inverting a lightning current peak value according to the magnetic field intensity peak value. The lightning current peak value estimation model established by the algorithm provides technical support for service applications such as thunder and lightning detection and early warning and forecasting of disastrous weather.

The invention provides a lightning conductor monitoring method, device and equipment and a readable storage medium. The method comprises the steps that when the electric field intensity reaches the point discharge intensity of fan blades, the current values of the roots of lightning conductors in N fan blades are obtained, and N is a positive integer; and comparing the N current values with zero, and determining the disconnection condition of the lightning conductors in the N fan blades according to the comparison result. According to the invention, only by obtaining the current value of the root of the lightning conductor in the fan blade and the atmospheric electric field intensity, the disconnection condition of the lightning conductor in the N fan blades can be determined according to the comparison result of the current value of the root of the lightning conductor in the N fan blades and zero; the method does not need to stop the rotation of the fan blade or assist of a crane or a self-climbing robot, is simple in operation, has real-time performance, and solves the problem that the current scheme for monitoring the conductivity of the lightning conductor in the fan blade is complex in operation, does not have real-time performance, and cannot find the disconnection of the lightning conductor in time.

The invention relates to an insulating test piece and a test electrode device using the same. The insulating test piece comprises a base body (1) made of a insulating material to be tested, a first holding groove (5) for matching and holding a high-voltage test electrode (3) is arranged on one side of the base body, a second holding groove (6) for matching and holding a low-voltage test electrode (4) is arranged on the other side, opposite to the first holding groove, of the base body, and an inter-groove insulating part (2) integrated with the base body is arranged between the first holding groove and the second holding groove. Compared with a traditional insulating material electric intensity test method, the local discharge of the material surface is reduced, the test result is more accurate, the test environment of the invention is consistent with the actual operation environment of the electric equipment, and the test result has more practical guiding significance.

The invention relates to microwave cavity resonator for monitoring bundle fiber material. The resonator is provided with a internal resonant cavity and can produce electric field in virtue of a coupling structure; the resonator also has at least a inlet for fiber material to flow in the resonant cavity; the resonator has at least one outlet for fiber material and a passage channel passing through the resonant cavity and communicating the inlet and the outlet for the fiber material. The inner profile of the resonant cavity is constructed like that: in the cross section of the microwave cavity resonator, points of the same electric intensity are lined and extends in a parallel in the passage channel, which enables the maximum space extension in the delivery but still smaller than the maximum space extension in the vertical direction.

The invention belongs to the field of materials, and in particular relates to a method for preparing calcium carbonate microspheres by using fibroin nanospheres as a template. The method comprises the following steps of: preparing 0.1 to 20 mass percent aqueous solution of silk fibroin and hermetically culturing the aqueous solution of silk fibroin for 0.5 to 48 hours at the temperature of between 10 and 90 DEG C; performing self-assembly on the silk fibroin when the electric intensity is 1.0*10<2>-1.0*10<5>V / m to form nanometer gel particles with the diameter of 10 to 2,000nm; performing freeze drying on the nanometer gel particles at the temperature of between 80 below zero and 0 DEG C to obtain solid silk fibroin nanospheres with the diameter of 10 to 2,000nm, wherein the nanometer gelparticles or the solid silk fibroin nanospheres are used as the template; and forming a calcium carbonate shell on the surface of the template to prepare the calcium carbonate microspheres. The wholepreparation process is performed at normal temperature and normal pressure without adding any toxic chemical reagent; and the calcium carbonate microspheres have controllable size and can fully meet the application requirements of various different fields such as cosmetic, ink, coatings, medicament-carrying materials and the like.

The invention discloses an electric field for a plasma or electrostatic purifier or dust removing equipment. The electric field is provided with a frame; two side surfaces of the frame are separately spliced with one fixed panel; two sides of the fixed panels are fixedly provided with cathode electric conduction frames; holes are formed in the middle parts of the fixed panels; electric fields consisting of at least two special-shaped pipes are sleeved in the holes; no blind area is formed in the spliced places of the special-shaped pipes; the middle parts of the special-shaped pipes are working sections; the internals of the working sections are hollow round pipes; two ends of the round pipes are connected with airflow guide sections; the airflow guide sections are provided with six arc side plates; one ends of the side plates are connected with cylinders, and the other ends of the side plates are spliced in sequence to form an orthohexagonal port; one of ports in two sides of the round pipes are intake ports, and the other ports are exhaust ports; and cathode discharge needles are arranged in the centers of the round pipes. The electric field solves the problems of existence of blind areas at two ends of a traditional circular honeycomb electric field and inconsistent discharge intensity of a hexagonal honeycomb electric field to achieve an optimal effect, reduces the wind resistance, improves the efficiency, and reduces the consumption of raw materials.

A general-purpose electric strength detection device, including a relay group, one input end of the relay group is connected with a transformer that can convert the mains AC220V and output a standard detection voltage of AC500V; the other input end of the relay group It is connected with a programmable controller PLC that can control the electrical signal of the relay group; the output terminal of the relay group is connected to the component to be detected through a transfer wire; it also includes a AC220V that can convert the mains power and output DC24V voltage to the programmable controller The PLC provides a stabilized power supply of the working voltage; the invention has obvious effects on improving the reliability of electric strength detection, improving work efficiency, reducing the frequency of quality problems, and eliminating potential safety hazards.

The invention discloses a lightning intensity measuring device and method. The lightning intensity measuring device comprises an alternating power supply, a planar antenna, an induction coil, a filter circuit, a broadband conditioning amplifying circuit, a sampling circuit, an FPGA kernel and a VGA information display module; the planar antenna comprises two copper plates which are parallel to each other, are horizontally arranged and are used for receiving changing electric field signals; the induction coil collects a magnetic field signal generated by the variable electric field and then outputs a tiny voltage signal; and the induction coil is sequentially connected with the filter circuit, the broadband conditioning amplification circuit and the sampling circuit and is used for inputting a voltage signal subjected to high-frequency component filtering and amplification into the sampling circuit for acquisition, transmitting the sampled voltage signal into the FPGA kernel for processing and displaying processed voltage data through the VGA information display module, and the alternating power supply is used for providing an analog voltage signal. According to the invention, the change of an atmospheric electric field can be measured according to the electrical and magnetic characteristics of lightning at different stages, and the high-altitude lightning intensity is reflected by the detected lightning intensity, so that monitoring and prevention are carried out.

The present invention provides an array tester. Fixed blocks moves parallelly along at least a direction. Modulating blocks conjoined to the lower part of the fixed blocks in a lifting manner and electrodes formed on a substrate form an electric field and detect defect of the substrate according to electric intensity. Air bearings are inserted between the fixed blocks and the modulating blocks and are used to prevent the modulating blocks from vibrating when the modulating blocks move. The center of a spraying stream of the air bearings is located at a height position of the modulating blockswhen the modulating blocks are conjoined to the fixed blocks, thereby, the vibration is reduced when the modulating blocks move. Furthermore, a stable time is shortened, thus, it is possible to perform array test at a high speed.

The invention provides a weak magnetic flow monitoring meter. The weak magnetic flow monitoring meter comprises a magnetic flux induction module, a master control module, a first amplifying module, a second amplifying module, a storage module and a display module, wherein the first amplifying module, the second amplifying module, the storage module and the display module are connected with the master control module respectively; the magnetic flux induction module transfers a magnetic intensity signal to an electric intensity signal and connects the electric intensity signal into the first amplifying module, the first amplifying module stabilizes the electric intensity signal within an amplitude range and connects the signal into the second amplifying module, and then the second amplifying module conducts impedance matching on the output electric intensity signal and conducts isolation interference; the master control module is used for controlling the amplifying fold of the first amplifying module, receiving the signal which is processed and transmitted by the second amplifying module and conducting corresponding calculation, wherein the calculation result is on one hand forwarded to the storage module to be stored, and on the other hand is transmitted to the display module to be displayed. According to the weak magnetic flow monitoring meter, the weak magnetic flow monitoring meter is simple in structure; meanwhile, the problem that a weak magnetic flow signal is hard to measure is solved, and the problem that monitoring data can only be stored locally and cannot be remotely transmitted is also solved.

The invention relates to a method for influencing the light current distribution in electrical systems, which are integrated in rotor blades of wind turbines, wherein at least one lighting current receiver is located in each rotor blade, in order to guide lighting currents via a discharge device from the rotor blade tip to the rotor blade root and onwards to earth. According to the invention, multiple overvoltage arresters are arranged between the respective electrical system positioned in the rotor blade and the part of the discharge device positioned in the rotor blade, wherein the partial current flowing in the event of lightening is reduced via the electrical system by a respective additional impedance, wherein the additional impedance is designed in such a way that, in the event of lighting, the resulting potential difference between the electrical system and the discharge device is aligned with the dielectric strength of the respective electrical system and the required separation distance between the respective system and the discharge device.