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.

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.

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.

A circulating friction electrostatic precipitator is composed of a first electrostatic precipitator, a second electrostatic precipitator, a friction generator, a centrifugal fan, a first single-pole double-throw switch, a second single-pole double-throw switch, and the like. The invention improves the efficiency of friction electrification through the cooperative friction electrification of the specially designed friction generator and the fan impeller; by adjusting the valve, the ratio of the amount of circulating gas to the amount of gas treatment can be controlled, thereby adjusting the dust-containing gas in the device. The residence time can be adjusted to adjust the electrification intensity, thereby controlling the dust removal efficiency of the device; the continuous operation of the device is ensured by the parallel connection of two electrostatic precipitators; compared with electric field electrification, the energy consumption is lower.

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.

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 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 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.

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 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.