33 results about "Structure constants" patented technology

The invention discloses a laser radar for detecting the atmosphere turbulence via a positioning sensitive detector, which relates to the refractive index structure constant profile Cn2 and atmospheric coherence length r0 of the atmosphere turbulence. In the invention, the laser radar takes a pulsed laser as the emission source, and the dual-aperture Rayleigh scattering echo received by the telescopes is focused on the positioning sensitive detector through the reflection prism, and the profile Cn2 and atmospheric coherence length r0 are obtained by micro-processing after the positioning signals are transferred to the digital signals via A/D processor.

The invention belongs to the technical field of electromagnetic wave polarization detection, and particularly discloses an efficient microwave polarization detection device based on a photonic spin Hall effect. For the detection device, electromagnetic wave to be detected is decomposed into left-hand circularly polarized beam and right-hand circularly polarized beam through the efficient photonic spin Hall effect, the module values and phases of the left-hand circularly polarized beam and right-hand circularly polarized beam are respectively measured, and backstepping is carried out to obtain the polarization of the electromagnetic wave to be detected. The photonic spin Hall effect is realized through linear geometry Berry phase gradient of total-reflection type meta-surface with a spin structure. Compared with the traditional polarization detection manner (linear polarization loudspeakers opposite to each other are used for directly measuring x component and y component of electromagnetic wave), the efficient microwave polarization detection device has the advantages that higher convenience and quickness are achieved, the errors are few, and the stability is better. The operating frequency of the device is 10-14GHz, and the structure constants of meta-atoms are scaled in equal proportion or redesigned, so that the operating frequency can be applied to other operating frequency ranges.

The invention discloses a laser flasher with big diameter for measuring the structure constant of atmospheric refractivity as well as the method for that. The laser flasher comprises two opposite-arranged reflecting telescopes and lasers on the lens cones. The incident lights reach to the secondary plane mirror after being reflected by a main parabolic mirror in the lens cones, pass the openings, attenuating pieces and narrow-band interference filters on the lens cones, and then are converged on a photoelectric detector. At transmission test, two arrangements are placed at the two ends of the transmission path; the emitting system at one end of the path gives out modulated laser signals, after being transmitted by a turbulent atmosphere, the light signals are collected by the telescope at anther end, and go through photoelectric conversion by the photoelectric multiplier near to the focus; then the electric signals enter into a built-in control system for demodulation, sampling, processing, saving and displaying. The invention is of high accuracy and improves the accuracy in the measurements.

The invention relates to an improved forward-backward sweep algorithm based power-grid low-voltage platform area line loss information processing method. The method includes the following steps: 1) acquiring basic data and operating data of a low-voltage platform area of a power grid; 2) computing load shape factors and circuit structure constants of the low-voltage platform area of the power grid and equivalent current of each node according to the basic data and the operating data; 3) adopting an improved forward-backward sweep algorithm to perform iterative computation to obtain voltage of each node and current of each branch; 4) computing line loss information of the low-voltage platform area of the power grid according to the voltage of each node and the current of each branch. Compared with the prior art, the method has the advantages of less needed data, simplicity in implementation, high information accuracy and the like.

Disclosed is a method to passively measure and calculate the strength of turbulence via the index of refraction structure constant C_n² from video imagery gathered by an imaging device, such as a video camera. Processing may occur with any type computing device utilizing a processor executing machine executable code stored on memory. This method significantly simplifies instrumentation requirements, reduces cost, and provides rapid data output. This method combines an angle of arrival methodology, which provides scale factors, with a new spatial/temporal frequency domain method. As part of the development process, video imagery from high speed cameras was collected and analyzed. The data was decimated to video rates such that statistics could be computed and used to confirm that this passive method accurately characterizes the atmospheric turbulence. C_n² accuracy from this method compared well with scintillometer data through two full orders of magnitude and more capability is expected beyond this verification.

The invention discloses a modulation and demodulation technique applicable to a heavy caliber laser isotope scanner. The heavy caliber laser isotope scanner is equipment used for measuring the structure constant of the atmospheric refractive index. Digital logic devices are used to compose a multi-resonant trigger circuit to output square signals with an adjustable frequency and a duty factor to control a laser to send out high-frequency carrier laser. when the carrier signals are transmitted through atmospheric turbulence, the turbulence modulates the amplitude of the carrier signals; a modulated wave is received by a reflecting telescope and is converted by a photomultiplier; background stray light and other direct current noise components are filtered out via a catholic grounding power supply circuit and by coordinating with a capacitance coupling signal output circuit; subsequently output direct current amplitude-modulated signals without the background are outputted after being amplified by a transconductance amplifier (TIA); the signals are coupled to AC square signals of plus-minus symmetry by a capacitance; DC signals only including high frequency peaks are obtained via an absolute value detector; a low-pass filter circuit with a very small RC time constant to filter out the high frequency peaks to accomplish signals demodulation and obtain turbulence pulsating signals. The application of modulation and demodulation technique improves the signal to noise ratio of the heavy caliber laser isotope scanner and the capacity of resisting disturbance and measuring accuracy of the device; therefore, the performance of the device is more stable. The method is also applicable to other fields where photomultipliers are used for feeble signals detection.

The invention discloses a method for measuring superoxide anion radicals in tape grass leaves, belonging to the measuring field of the measuring of superoxide anion radicals. The method comprises the following steps of: firstly, collecting and cleaning the tip parts of fully exposed small and tender tape grass leaves; carrying out Tiron captureing on the Tiron of radicals in a closed operation box in a closed nitrogen environment; and finally measuring by using an EPR (Electron Paramagnetic Resonance) technology. The invention has the advantages of simpler operation and easy grasping, and can measure the superoxide anion radicals of the tape grass leaves in a very short time;, find that and the measured radicals are found to be the superoxide anion radicals according to the superfine structure constant and, the spectrogram shape analysis of an EPR spectrogram and the combination of the remarkable decreases of the radical strength of the leaves pretreated by SOD (Super Oxide Dismutase), and therefore the invention is the most direct, accurate and effective method for measuring the superoxide anion radicals. Superoxide anions are sensitive to pollutants and have a favorable dosage effect relation. The invention is also suitable for other aquatic plant and terrestrial plant species and can be suitable for measuring the radicals of the plant root tissue.

A comb polymer that is a dispersant in a binder composition includes an alkaline activating agent, wherein the activating agent is intended for activation of a latently hydraulic and/or puzzolanic binder, and wherein the comb polymer has a polymer backbone formed from a plurality of backbone monomers and a plurality of polymeric side chains each formed from a plurality of side chain monomers and bonded thereto, and wherein at least some of the backbone monomers have one or more ionizable groups, and features a structure constant K of the comb polymer, defined as K=[(N−1)z]²/nP⁹¹⁵N^3/5×10⁵, at least equal to 70, where n is the average number of side chains per comb polymer molecule, N is the average number of backbone monomers per side chain, P is the average number of side chain monomers per side chain, and z is the average number of ionizable groups per side chain-free backbone monomer.

The invention relates to a bridge structure constant load response time domain fusion analysis method, and belongs to the field of bridge structures. The method comprises the following steps: S1, extracting and analyzing bridge monitoring data at the same temperature, and eliminating the influence of temperature effects; S2, reducing the influence of random interference utilizing a time domain averaging technique; S3, extracting a bridge constant load response characteristic quantity utilizing an autoregressive integrated moving average model; and S4, performing data fusion on the acquired bridge structure constant load response information through a fuzzy support vector machine to obtain a final TDFA(Thulium Doped Fiber Amplifier) analysis result. According to the bridge structure constant load response time domain fusion analysis method, on the premise that the influence of temperature factors is eliminated and the influence of random factors is reduced, the characteristic quantity representing the changing condition of a structure constant load response is directly extracted from complex bridge safety operation monitoring signals, the slow evolution process of variables in a whole monitoring period is deeply analyzed, and scientific reference bases are provided to the technicians for management and maintenance of in-service bridges.

The umbrella structure constant force spring hanging frame has novel design and may be used in a narrow space. The variable spring hanging frame in any required rigidity may be formed with standard springs, and product with vertical displacement and small load may be produced to meet the special requirement of contact network tension compensator in electric railway.

The invention relates to a system and a method for measuring the constant of an atmospheric refractive index imaginary part structure. The system comprises a transmitting terminal, a receiving terminal and a data acquisition, storage and processing unit, wherein the transmitting terminal comprises a modulator, a driving power, a light-emitting diode and a divergent lens, and the modulator is used for modulating the driving power; the receiving terminal comprises a receiving lens, a photodiode, a temperature stabilizing liner, a pre-amplifier, a detector and a low-frequency amplifier; the data acquisition, storage and processing unit comprises a data acquisition unit, a storage device and a data processing module. The system and the method are capable of accurately and objectively measuring the constant of the atmospheric refractive index imaginary part structure.

The invention discloses a measurement method of transformation of a refined structure constant and a system with the same applied, and belongs to the technical field of atomic frequency standards. The system comprises an atomic clock group and a counter group, wherein the atomic clock group is composed of at least two atomic clocks, and the counter group is composed of at least two counters. Each atomic clock comprises an atomic clock physical system, an isolation amplifier, a frequency stability tester, a high-stability signal source, a micro-controller, a digital/analog (D/A) conversion module and a constant flow source module. According to the measurement method, the micro-controllers carry out measurement on output constant frequency of various atomic clocks in the atomic clock group through the counter group, wherein the frequency drifting is conducted on the atomic clocks, the output frequency output everyday by each atomic clock is represented through power series of the refined structure constant, and the transformation situation of the refined structure constant along with time is detected out. According to the measurement method of the transformation of the refined structure constant and the system with the same applied, transformation of the output frequency of a plurality of atomic clocks can be really reflected, and accordingly the transformation situation of the refined structure constant can be accurately measured out.

The invention relates to a processing method for millimeter-wave radar signals in adaptive cruise, which is used for acquiring and processing millimeter-wave radar signals of a target obstacle near avehicle at the current moment. The processing method comprises the steps of S10, acquiring road attributes of the current position according to navigation information; S20, selecting a signal processing mode and a filtering model according to the road attributes; S30, accumulating and filtering the millimeter-wave radar signals by using the filtering model; S40, performing constant false alarm processing on the signals acquired in the step S30; S50, and completing target detection and angle calculation according to the structure constant false alarm processing. The invention provides a methodof integrating navigation scene information into millimeter-wave radar signal processing, and different filtering parameters are selected according to different road information, thereby being more accurate in judgment for the radar signals finally, and providing an accurate basis for point trace recognition of the subsequent adaptive navigation. Meanwhile, the processing method can adapt to target detection in various road conditions such as expressways, ordinary highways and urban roads, and improves the accuracy of tracking by using radar speed measurement information.

The invention discloses a method for measuring atmospheric aerosol mass vertical conveying flux. The method comprises the following steps: calculating an atmospheric effective refractive index real part according to measured atmospheric average temperature and atmospheric average pressure intensity, and calculating a ratio of atmospheric temperature to the atmospheric effective refractive index real part; calculating an atmospheric effective refractive index imaginary part according to atmospheric visibility, and calculating a ratio of atmospheric aerosol mass concentration to the atmospheric effective refractive index imaginary part according to the change of the atmospheric aerosol mass concentration and the change of the atmospheric effective refractive index imaginary part; calculating the atmospheric aerosol mass vertical conveying flux according to the ratio of the atmospheric temperature to the atmospheric effective refractive index real part, the ratio of the atmospheric aerosol mass concentration to the atmospheric effective refractive index imaginary part and an atmospheric effective refractive index structure constant calculated by using a preset method. According to the method, the atmospheric aerosol mass vertical conveying flux can be objectively and accurately measured. The method has good time and space representativeness.

The invention provides a continuous multi-surface two-phase structure constant temperature vacuum dehydration method, a device and an application thereof, the interior of the device forms a multi-surface constant temperature vacuum dehydration environment, the dehydration material liquid is sprinkled to the dehydration environment by cutting a sprinkler head, so as to enter the sprinkling state from top to bottom and constitute a 'liquid-gas' two-phase structure with a very large surface area; the water molecules in the liquid phase enter in the gas phase, the dehydration environment is constantly extracted by a vacuum system so as to achieve the dehydration; a control system controls the internal heating power, the power of a vacuum pump and the opening and closing of a feed valve, a circulating valve and a discharge valve and realizes the continuous stable dehydration according to the parameter values of liquid level, temperature, vacuum degree and water content, etc., which are detected by a sensor. The device overcomes the shortcomings of poor heat transfer and mass transfer effect, high energy consumption, intermittent operation, low efficiency and wide distribution of the water content indicators in the different batches and poor stability of the traditional dehydration device, thus realizing the energy-saving, high efficient, continuous and highly stable dehydration process.

This invention relates to an anti-weather interference image collection system, in which, an AD converter converts the picked up image signals to digital image signals to be input to a computer via a communication interface, a time weight module gets time weight by time parameters and a parameter input module transmits the parameter information to a computer to transfer the modulated transferred function signals of the image to a signal filter module to filer the original image to get a recovered image of the weather. The work flow is: 1, initialization, 2,image collection, 3, image pre-process, 4, time weight computation, 5, computation of index of refraction structure constant, 6, computing the atmosphere modulated transferred function, 7, image filter, 8, storing the image 9, displaying the image.

The invention discloses an intelligent street lamp with an atmospheric refractive index structure constant measuring function. The intelligent street lamp comprises an LED (Light Emitting Diode) lamp,a lamp post, a high-sensitivity temperature pulsator, a thermometer, an electronic barometer, a work control display panel and an alternating current and direct current converter, wherein the LED lamp is arranged on one side of the upper end of the lamp post, the high-sensitivity temperature pulsator is arranged on the top end of the lamp post, the work control display panel is installed on the middle lower part of the lamp post, the thermometer and the electronic barometer are installed in the middle of the lamp post, and the alternating current and direct current converter is arranged in the lamp post and is used for converting commercial power to be supplied to the high-sensitivity temperature pulsator. The intelligent street lamp has the advantages of the novel structure, double purposes of one object and convenience in atmospheric turbulence monitoring and laser communication and has the function of accurately measuring the refractive index structure constant in real time.

The invention discloses a method for inverting an atmosphere refractive index structure constant by measuring an atmosphere coherent length result. The method comprises the steps of designing a systemfor measuring atmosphere coherent length by a differential image motion method to detect fluctuation of an arrival angle caused by wavefront distortion; obtaining a plurality of single-frame short-exposure differential motion light spot images at an image surface of a receiving end by a measurement system; processing the acquired images by software to obtain jitter variance Sigma <2><t> and Sigma<2><t> of two arbitrary light spot mass centers in a horizontal direction and a vertical direction, and calculating atmosphere coherent length values r0 in different directions according to a formula;4, counting the atmosphere coherent length values r0 in different directions in the step 3 to solve an atmosphere coherent length measurement value averagely acquired at a current moment; and 5, reverting a value of the atmosphere refractive index structure constant C<2><n> according to a measurement value in the step 4. By the method, the turbulence strength change in an atmosphere channel can be measured and analyzed by calculating the atmosphere refractive index structure constant.

The utility model relates to a constant tire pressure device of a rubber wheel joint structure of a motor vehicle, which relates to the fields of machinery and electronics. The purpose of the present invention is to provide a constant tire pressure device with a rubber wheel joint structure for a motor vehicle. In order to achieve the aforementioned purpose, the solution of the present invention is: a gas storage bottle, a stabilized air delivery device, and a rubber inner tube valve core are detachably connected. The equipment is composed of three parts, among which: the gas storage cylinder can include electric, mechanical structure voltage stabilization equipment, non-mechanical gas production equipment, high pressure gas storage container, and pressure stabilization gas conveyor as the output part of the gas storage cylinder, through electronic automatic control, Mechanical automatic control, electromechanical integrated control to stably output gas with a specific value of pressure; the detachable type connected rubber inner tube valve core equipment is a mechanical device, which connects the stabilized gas conveyor and the valve core of the rubber tire rubber inner tube and maintains it. Sealed state. The invention has the advantage that the tire pressure can be stably maintained for a long time.

The invention relates to electronic techniques, and provides a constant-current drive circuit of an LED switching power supply. The constant-current drive circuit comprises a rectification filter circuit, a power tube, an RS flip-flop, an oscillator and an operational amplifier. Two input ends of the RS flip-flop are respectively connected with an output end of the operational amplifier and the oscillator, and a Q end of the RS flip-flop is connected with a grid of the power tube. The constant-current drive circuit of the LED switching power supply is characterized in that the operational amplifier is connected with the input ends of the RS flip-flop through a delay doubling circuit. The constant-current drive circuit of the LED switching power supply has the advantages that the delay doubling circuit is added in a loop circuit compared with an existing BUCK structured constant-current drive circuit, and enables output current to be unrelated to LED voltage, clock periods and intensity of inductance, and therefore the constant-current drive circuit is good in constant-current characteristic.