535results about How to "Meet the measurement requirements" patented technology

The invention relates to non-contact type on-line measurement device and method of a large-size bearing roller way in the technical field of measurement. The device comprises a laser displacement sensor, a fixing device, a data acquisition module and a data processing module, wherein the laser displacement sensor is connected with the data acquisition module for transmitting distance point range data, and the data acquisition module is connected with the data processing module for transmitting the distance point range data of the laser displacement sensor; and the fixing device is respectively connected with the laser displacement sensor and a numerical control machine. The method comprises the following steps of: mounting the device on a knife rest of the numerical control machine; scanning a bearing roller way plane by utilizing the knife rest of the numerical control machine to drive the laser displacement sensor; and processing data to acquire the shape and parameters of the cross section of the bearing roller way and obtain the shape deviation of the bearing roller way plane. The invention realizes non-contact on-line measurement, enlarges the application range, meets the requirements of bearing measurement and effectively improves the precision and the efficiency of the measurement of the bearing roller way plane.

The invention relates to a device and a method for on-line three-dimensional measuring of a laser radar of heavy forging in the measuring technical field, which comprises a two- dimensional laser radar, a servo-motor, a junction box, a rotary main shaft, a spacing and null point sensor, a bearing block which is provided with a bearing, a band brake apparatus, a back supporting stand of the laser radar, an L-shaped mounting bottom plate, a vertical mounting chassis, a movement-control card, a data collecting card, and a computer which is used for processing data. Firstly, the laser radar is positioned on the horizontal surface of a forging axial cord, then four surfaces of the forging are respectively scanned by the laser radar, the two-dimensional laser scanning radar is scanned in the surface which is vertical to an axial cord of the forging, the servo-motor drives the laser radar to rotate in the horizontal surface, thereby the three-dimensional scan of the forging is realized, finally, shape and parameter of the forging are gained through data process, and deviation of the shape of the forging is gained. The invention greatly increases accuracy and speed of identification, enlarges range of application, satisfies measuring requirement of a forging, and effectively increases measuring accuracy and efficiency of the forging.

The invention discloses a double-tuned microwave spectrum analyzer. After a microwave input signal passes through a switch filtering matrix, the first frequency conversion of the microwave input signal is realized by utilizing a big step tunable microwave local oscillator, and the second frequency conversion of the microwave input signal is executed by utilizing a tunable radio frequency local oscillator with continuous frequency, so the frequency spectrum measurement of the microwave signal is realized. Requirements of various users on measurement can be met by changing the frequency of the step tunable microwave local oscillator and combination of filters of the switch filtering matrix according to requirements of users on practical measurement; and the double-tuned microwave spectrum analyzer is simple in design and easy to realize, and greatly lowers the measurement cost of users.

The invention relates to a man-machine interaction method based on human body gesture recognition. Arm movement and finger movement in a user behavior process are collected through a KINECT device, collected images are subjected to operation processing, the processed images are recognized, and operation control is conducted after recognition; when the arm movement is recognized, image collection is conducted through the KINECT device, skeleton image data of a human body is obtained, mapping from a real person to a virtual person is conducted, the obtained data is processed to obtain behavior of elbows and palms, and corresponding movement is recognized through calculation and analysis to execute control operation; when the finger movement is recognized, a deep image is obtained through the KINECT device, the position of a hand is obtained according to palm coordinates, an appropriate palm area is captured, the palm deep image is processed to obtain HU invariant moment of a finger image, and control operation is executed after the HU invariant moment is matched with a standard gesture. Seamless man-machine interaction is achieved, and new experience is brought to users.

The invention discloses a two-stage TDC circuit. The two-stage TDC circuit comprises a first counter portion and a second counter portion, wherein the first counter portion comprises a delay unit, a decoding circuit and a latch, a closed-loop delay line type structure is adopted, and the second counter portion is a pseudo random sequence counter. The two-stage TDC circuit is controlled by gating signals, capable of being turned on and off repeatedly, determined in the initial state and rapid in start. The circuit is applied to an array type infrared three-dimensional imaging reading circuit and configured outside, inside or partially outside pixels as required. Compared with an ordinary TDC circuit, the circuit is simple in structure and capable of working at high frequency, improving the temporal resolution, generating stable oscillation frequency simultaneously and satisfying application requirements for small pixel circuit area, low power consumption and high temporal resolution in array type infrared imaging reading circuits.

The invention discloses a method for detecting braking property of a vehicle in a road test based on improved Kalman filtering, which comprises the following steps: on the basis of referring a 'current' statistical model of an engine driven carrier in the navigation field, establishing a system motion model in the vehicle braking process; according to the Kalman filtering theory, using a speed and an azimuth angle outputted by a single-frequency carrier phase single-point GPS (global position system) receiver as the system observed volumes; and high frequently and precisely calculating a plane motion coordinate and the speed in the vehicle braking process, by utilizing the improved Kalman filtering recursive algorithm, thereby calculating and confirming a vehicle braking distance and a mean fully developed deceleration MFDD.

The invention provides a polarization-maintaining flat optical fiber coupling ball microscale sensor based on polarization state detection and belongs to the technology of manufacturing and measurement of precise instruments. The polarization-maintaining flat optical fiber coupling ball microscale sensor comprises a laser, a semi-transparent semi-reflective prism, a quarter lambda wave plate, a probe, a polarization state detection device A, a polarization state detection device B and a computer, wherein the probe is composed of a flat package layer polarization-maintaining optical fiber and a coupling ball, and the laser, the semi-transparent semi-reflective prism, the quarter lambda wave plate and the probe are arranged in sequence. Emergent light of the laser is reflected and transmitted by the semi-transparent semi-reflective prism, and reflected light enters the polarization state detection device A; transmission light enters the probe, reverse transmission of a transmission light beam is achieved after the transmission light beam passes through the coupling ball, the transmission light exits from the probe, and emergent light passes through the quarter lambda wave plate, is reflected by the semi-transparent semi-reflective prism again and then enters the polarization state detection device B. When the difference value between the polarization state detected by the polarization state detection device B and the polarization state detected by the polarization state detection device A is changed, it can be determined that the probe is in contact with a detected hole. The polarization-maintaining flat optical fiber coupling ball microscale sensor is high in precision and high in speed.

The invention discloses a two-dimensional reflection type supersonic wave wind speed anemoscope and a measuring method. The wind speed anemoscope comprises a control unit, a data processing unit, a wind speed and wind direction measuring unit, a direction calibration unit, a temperature compensation unit and an air pressure compensation unit. The wind speed and wind direction measuring unit is composed of a supersonic wave emitter, a supersonic wave receiver and a timer module; the direction calibration unit is composed of a digital compass and a magnetosensitive diode; the temperature compensation unit is composed of a temperature detection module and a heating module; and the air pressure compensation unit is composed of an air pressure sensor and a data acquisition module. According to the invention, one integrated ultrasonic sensor is employed for emission, one of echo signals is received, four receiving sensors receive and reflect the echo signals, the five sensors are arranged on the same horizontal plane, a wind speed and a wind direction can be calculated simply by use of a time difference between emission and receiving once, the measuring principle is simple, the measuring precision is improved, the service life of the instrument is prolonged, and the anemoscope and the method are suitable for various severe measuring environments.

The invention discloses an intelligent high/low-voltage switch cabinet capable of realizing remote monitoring. The intelligent high/low-voltage switch cabinet comprises a switch cabinet body. The top portion of the cabinet body is fixedly provided with an LED communication device, a heat radiation device and a monitoring camera device. The cabinet body is internally provided with a cabinet body monitoring device. The bottom surface in the switch cabinet body is provided with a cabinet body driving device. An electric push rod is connected with a cabinet door. The outer layer of the cabinet door is provided with a meter area, a password input device, a key area and a fingerprint unlocking device. The inner layer of the cabinet door is provided with a guide bar, a first ball screw rod, a first bevel gear, a second bevel gear, a first L-shaped plate, a first motor, a first servo motor, a slide base, a first guide rail, a second guide rail, a left L-shaped plate, a right L-shaped plate, a second motor plate, a second servo motor, a second ball screw rod, a slide plate and a temperature measuring device. The intelligent high/low-voltage switch cabinet realizes communication through LED optical signals, is stable and fast in speed, can realize remote operation, has four encryption modes, is safer, and realizes automation and full coverage of remote monitoring through the temperature measuring device and a motion mechanism.

The invention discloses an array type air pressure measurement compensation device and method based on quantum particle swarm wavelet neural network. A micro-processing module is started to send instruction to a pressure sensor array and a temperature sensor, so that the air pressure and temperature are measured; measurement data is transmitted to the micro-processing module and a host computer respectively; the host computer establishes a wavelet neural network according to the received air pressure and temperature, and the wavelet neural network is optimized by utilizing the quantum particle swarm algorithm, the quantum particle swarm wavelet neural network is trained at the same time, and an obtained air pressure correction compensation formula is transmitted to the micro-processing module; the micro-processing module calculates the accurate air pressure value whose error is compensated; and the accurate air pressure value is transmitted to a display module and displayed. Retardation error of air pressure measured by arrays is compensated on the basis of the quantum particle swarm wavelet neural network, temperature drift and non-linearity are compensated, errors are reduced, effective signals are enhanced, air pressure measurement is more accurate, and requirements for meteorology measurement are met.

The invention relates to high speed parallel multichannel data system for nucleus spectrum and nuclear electronics. It is made up of 4 independent channels, and includes analog circuit, 14 bits ADC, and a 4 channel timer distributor. The analog signal would be transformed to digital quantity and input into large capacity FPGA chip to take online analysis of time, amplitude, sampling points information and relativity, taking effective data selection and inputting into host computer through network or USB2.0 interface.

The invention provides a temperature and pressure integrated sensing device based on high birefringence photonic crystal fiber surface plasmon resonance and a measuring method thereof. The sensor includes a wide spectrum light source, a fiber connector, a common single-mode fiber, a high birefringence plated film photonic crystal fiber and a spectrometer. The external temperature and the pressureof the high birefringence plated film photonic crystal fiber are judged through surface plasmon resonance wave spectrums detected by the spectrometer. In a condition of a certain pressure, when the external temperature of the sensor increases, the resonance wavelength is reduced; when the external temperature drops, the resonance wavelength is increased. In a condition of a certain temperature, when externally applied pressure of the sensor increases, the resonance wavelength is increased; when the externally applied pressure is reduced, the resonance wavelength is reduced. A light source is replaced by the light source the wavelength of which is close to a surface plasmon resonance wavelength, and a loss spectrum analysis method is utilized to determine a position where surface plasmon resonance occurs. According to the invention, the external temperature and the pressure can be analyzed and detected once at the same time.

The invention discloses a method for simultaneous measurement of 17 trace elements in reconstituted tobacco by using inductively coupled plasma mass spectrometry. According to the invention, microwave digestion and inductively coupled plasma mass spectrometry are combined together to measure 17 trace elements in reconstituted tobacco; a reconstituted tobacco sample is subjected to microwave digestion, and then ICP-MS measurement is quantitatively carried out through combination of a standard mode, collision/reaction cell technology and an internal standard method. Measurement results show that: 17 target elements have good linearity, a correlation coefficient r is no less than 0.9995, a detection limit is 0.001 to 0.065 mu g/L, an added standard recovery rate is 79.31 to 123.07%, and relative standard deviation is 1.15 to 6.38%. The method provided by the invention has the advantages of simple operation, short analysis time, stability, accuracy, etc. and can be used for analysis and test of large-batch reconstituted tobacco samples in the tobacco industry.

The present invention discloses a method for measuring a carrier interference noise ratio. The method comprises that a plurality of sub-carriers are respectively selected from the frequency spot on the two symbols in one or a plurality of time frequency units, and the number of the sub-carriers selected from each time frequency unit is the same; one or two symbols is (are) respectively selected from the two symbols of the time frequency unit, the interference noise power of the frequency domain channel response estimated value of the sub-carrier on the symbols selected is accounted, and the interference noise power of the sum of the frequency domain channel response estimated value of the sub-carriers on the symbol; according to the characteristic that the frequency domain channel response of the sub-carrier on the symbol in the time frequency unit keeps invariable on the frequency domain, the power error caused by the frequency domain channel response changing along time in the former interference noise power is eliminated; according to the interference noise power of the sub-carrier frequency domain channel response estimated value after being eliminated, the carrier interference noise ratio is calculated. The present invention can accurately measure the carrier interference noise ratio when the terminal experiences a time-varying channel or a time-invariant channel.

The invention is suitable for the technical field of optical three-dimensional digital imaging and provides a fringe projection profilometry-based efficient phase position-three-dimensional mapping method. The fringe projection profilometry is on the basis of a binocular system, and the binocular system comprises a projection device and an imaging device. The method comprises the following steps: S1, protecting fringe sequence to the surface of a to-be-detected object by the projection device, acquiring a deformed fringe graph modulated by the to-be-detected object by the imaging device, and calculating according to the deformed fringe graph to obtain the phase positions of all the pixel points on the image of the imaging device; and S2, finding out a phase position-three-dimensional mapping coefficient corresponding to each pixel point from a preset phase position-three-dimensional mapping coefficient lookup table and substituting the phase position of each pixel point and the corresponding phase position-three-dimensional mapping coefficient into a phase position-three-dimensional mapping function so as to calculate the three-dimensional coordinates of an object point corresponding to each pixel point on the image of the imaging device. By the method provided by the invention, efficient three-dimensional reconstruction of fringe projection profilometry can be realized.

The ultrasonic output measuring system as one medical measurement instrument has measuring hydrophone and reference hydrophone fixed on the precise orientating and positioning system with 11 freedomsfor measured probe and measuring hydrophone; storage oscilloscope-computer system with signal input connected to the measuring hydrophone and the reference hydrophone; 3D ultrasonic field step motor driving and controlling system connected to the signal output of the storage oscilloscope-computer system via RS232 interface and to the precise orientating and positioning system via drive cable and signal cable; auxiliary equipment and mechanical framework for the precise orientating and positioning system to be set on. The present invention can measure all the index parameters of ultrasonic diagnosis instrument in scanning state.

The invention discloses a method for testing the mechanical property of a superhard diamond film. The testing method comprises the following steps of: measuring a hardness and an elastic modulus of the diamond film by a micron indentation method; continuously applying a load in the range of a plurality of N to thousands of N to the diamond film by an automatic loading mechanism; applying the continuous load to the surface of the diamond film by an artificial diamond indenter and controlling the indentation depth in the range of one tenth to one fifteenth of the film thickness; processing by adisplacement sensor and a computer to obtain a load-depth curve of a material; obtaining a load-depth curve in the unloading process according to a preset unloading rate; and calculating two groups of data to obtain the elastic modulus and the hardness of the material. In the invention, the hardness and the elastic modulus of the diamond film are measured by the micron indentation method; and thecheap diamond pressure head is utilized to replace an expansion diamond film pressure needle, so that the experiment cost is reduced, the experiment error is reduced, and the measurement requirementson the hardness, the elastic modulus and the film-substrate cohesion of the diamond film can be met.

The invention relates to a micro-built-in cantilever beam type displacement meter used for a geomechanics model test, and the micro-built-in cantilever beam type displacement meter comprises a spring leaf, a steel wire rope and a strain gauge, etc., the both ends of the steel wire rope are respectively connected with the upper end of the spring leaf and an internal measuring point of a model; and a regulating screw bolt is arranged on the upper end of the spring leaf. The lower end of the spring leaf is fixed on a thick steel bar, the strain gauge is arranged at the root which is near to the lower end of the spring leaf and is connected with a signal receiving and processing device by a signal line. The micro-built-in cantilever beam type displacement meter has the following advantages: (1) Small size and small occupying space. (2) High sensitivity. (3) Simple structure, convenient processing and low cost. (4) Adjustable property. (5) Being embedded in the model possibly. The displacement meter can be embedded in the model, and the measurement is carried out by leading out the signal line.

The invention discloses a device and a method for measuring the shapes of spaces on the basis of low-reflectivity three-core fiber grating arrays, and belongs to technologies for manufacturing and measuring precision instruments. The device is structurally characterized in that a three-core fiber fan-out device is connected with an optical cable of a low-reflectivity three-core fiber Bragg grating array sensor, the optical cable of the low-reflectivity three-core fiber Bragg grating array sensor comprises a three-core fiber and a protective sleeve, fiber cores of the three-core fiber are uniformly configured, the protective sleeve is configured on the outside of the three-core fiber, and low-reflectivity fiber Bragg grating arrays are written on the three-core fiber. The method for measuring the shapes of the spaces includes measuring spectra by an optical frequency-domain reflectometer OFDR under the effects of a multi-way optical switch to acquire stress and temperature distribution of the low-reflectivity fiber Bragg grating arrays and optical cables of reference fiber Bragg grating arrays; decoupling influence of temperatures; reconstructing information of the shapes of the spaces. The optical cables of the reference fiber Bragg grating arrays are packaged in an outer stress isolation mode. The device and the method have the advantages that the device and the method are high in signal-to-noise ratio and precision and are insensible to environments, and the device can be attached onto the surfaces of measured components to measure the measured components in real time and is long in service life.