52results about How to "Reduce measurement efficiency" patented technology

A method non-dispersive infrared (NDIR) gas analysis, which can be carried out by a gas analyser comprising a cell (10) containing of gas, a sender (30) of IR waves and at least a receiver (40) of such waves. The transmission of IR waves and/or the reception of IR waves after the passage of the gas occur directly in the cell (10) same wherein the gas is fed. The analyser has a body (11) defining the cell (10), a sender (30) of IR waves and at least a receiver (40) of such waves, that are located opposite to each other with respect to the cell (10). The IR sender (30) and the receiver (40) are both arranged in the cell (10) at its end (13,14). The body (11) has inlet (15) and outlet (16) channels for the gas and a cavity (17), which can be metal coated inside and that defines the optical path (80) for the IR waves. The body (11) is directly mounted on a printed circuit board (100) that has the electronic control unit for transmission of the IR waves and for analysis of the signals coming from the receiver (40).

The invention discloses a device for calibrating geometric quantity of a static calibration table of a wind tunnel balance, belongs to the field of geometric quantity, and is suitable for calibrating geometric parameters of a return mechanism of the static calibration table of the wind tunnel balance, a measurement system and a loading mechanism. According to the device, a loading coordinate system is reproduced by cooperation of a micro-alignment telescope and a reference cubic mirror mounted on a loading head; the micro-alignment telescope is rotated at an angle of 180 degrees by a precise rotary table; a linear guide rail equipped with a double-grating scale is driven to drive the micro-alignment telescope to move and be aligned to a reference line of the loading mechanism, and the geometric parameters of the loading mechanism are measured by data of the double-grating scale, so that the problems of low precision and low efficiency of an existing mounting measurement method are solved; in addition, a lifting mechanism is driven through a spiral lifting machine to adjust the height of the device, so that the calibration needs of geometric parameters of static calibration stables of wind tunnel balances different in type can be met.

The invention provides a rut detecting device and a detecting method thereof, and the rut detecting device comprises a distance sensor part, a signal conditioning circuit part, an analog signal digitizing circuit part, a main control circuit part, a speed matching circuit part, a communication circuit part and a computer part; the distance sensor part consists of at least one sensor used for measuring distance; the signal conditioning circuit part consists of a signal switching circuit and a pre-amplifier gain circuit; the analog signal digitizing circuit part consists of an analog-to-digital converter; the main control circuit part consists of a microprocessor circuit part; the communication circuit part consists of communication devices; the speed matching circuit part consists of a speed detecting circuit and a distance triggering circuit; the computer part consists of a computer containing a processor and a storage and having the functions of displaying, calculating and storing. The rut detecting device improves the speed and the precision of rut detecting.

A fine timing measurement FTM method and a communications device are disclosed. The method includes: receiving an FTM request frame from at least two communications devices; and sending a first FTM measurement frame according to the FTM request frame, where the first FTM measurement frame includes a measurement parameter of each of the at least two communications devices and identifier information used to indicate each communications device, so that each communications device obtains the measurement parameter according to the identifier information.

A lower side coupling of a Hirth coupling is coaxially coupled and fixed to a spindle, an upper side coupling of the Hirth coupling is coaxially coupled and fixed to a lower rim, the upper side coupling of the lower rim is meshed with the lower side coupling of the spindle, and upward separation of the lower rim from the spindle is prevented by chuck mechanisms.

In a method for acquisition of a measurement data set of a respirating examination subject by magnetic resonance technology, the measurement data set is acquired by numerous individual measurements, wherein, for each individual measurement, a respiratory position and a respiratory phase are determined, based on which it is decided whether the individual measurement is to be included in the final measurement data set from which an image data set is reconstructed.

A monopole acoustic logging while drilling instrument used together with a bottom hole assembly and a method for measuring a shear wave velocity of slow formations, wherein the bottom hole assembly includes a drill collar and a drill bit, wherein the monopole acoustic logging while drilling instrument is installed on the drill collar. The monopole acoustic logging while drilling instrument comprises: an acoustic receiver array installed on the drill collar; a monopole acoustic source arranged at the drill collar, wherein the monopole acoustic source is configured to emit acoustic waves with a frequency in a preset frequency range, and the ratio of the outer diameter D1 of the drill collar to the outer diameter D2 of the drill bit is d, and 0.75<d<1.

The invention discloses a method for analyzing wood growth ring micro-density images, which belongs to the field of electronic information, in particular to a method for collecting and analyzing the wood growth ring micro-density images. Growth ring micro-density measuring methods include traditional weighing methods and X ray densimeter methods, etc. The traditional weighing methods are simple, but have low measuring efficiency and low precision. The X ray densimeter methods have high measuring precision but expensive price. The method for analyzing the wood growth ring micro-density images of the invention builds universal high-precision processing techniques and application platforms of the wood growth ring images, and adopts self-adaptive wave filtering, histogram equalizing technique, mathematical morphology and image difference methodology for processing the wood growth ring images so as to eliminate noise, increase image brightness and rectify background error. The method for analyzing the wood growth ring micro-density images can analyze X ray images, scanning images and digital camera images, etc., measure not only growth ring density but also growth ring width, and implement intuitive cross dating during measurement.

The invention discloses a cylinder special-shaped buckling detection device and a recognition method. The device comprises a camera, a laser range finder, a level instrument and a tripod. Monocular vision and laser are combined for detecting the maximum diameter of the special-shaped buckling appearing after a concrete filled steel tubular column is detected to be subjected to low cyclic loading. Measurement requirements can be met, the maneuverability, the flexibility and the measurement accuracy of the measurement device can be improved, the phenomenon that the measurement efficiency and the measurement precision are reduced as the camera and the laser range finder mutually separated are used frequently in turn can be avoided; Hough transform based on secondary gray value processing is used, a circle tangent to points at two ends of the maximum diameter of the buckling is found and calculated, secondary gray value threshold processing is carried out, remaining noise points are reduced, and the accurate maximum buckling position at a sample and the maximum diameter of the special-shaped buckling can be acquired.

A laser measurement system for measuring up to 21 geometric errors, in which a six-degree-of-freedom geometric error simultaneous measurement unit and a beam-turning unit are mounted on either the clamping workpiece or the clamping tool, while an error-sensitive unit is mounted on the remaining one, the beam-turning unit has several switchable working postures and multi-component combinations in its installation state, it can split or turn the laser beam from the six-degree-of-freedom geometric error simultaneous measurement unit to the X, Y, and Z directions in a proper order, or the beam-turning unit can split or turn a beam from the error-sensitive unit to the six-degree-of-freedom geometric error simultaneous measurement unit. The present invention is of simple configuration and convenient operation. Up to 21 geometric errors of three mutual perpendicular linear motion guides are obtained by a single installation and step-by-step measurement.

The invention relates to a high-efficiency full-automatic paper tube measuring and sorting machine. The high-efficiency full-automatic paper tube measuring and sorting machine comprises a material storage box, a continuous material feeding mechanism, a material collecting groove, a detecting mechanism, a material discharging groove, a continuous material receiving mechanism and a material stirringand sorting mechanism which are sequentially arranged from left to right, wherein the material storage box is used for storing to-be-detected paper tubes, a material discharging mechanism used for conveying the paper tubes to the continuous material feeding mechanism is arranged at the right end of the material storage box, the continuous material feeding mechanism is used for continuously conveying the paper tubes conveyed from the material discharging mechanism to the material collecting groove, the detecting mechanism is used for detecting the lengths of the paper tubes in the material collecting groove and conveying the detected paper tubes to the material discharging groove, the continuous material receiving mechanism is used for receiving the paper tubes conveyed from the material discharging groove, the material stirring and sorting mechanism is used for sorting the paper tubes conveyed from the continuous material receiving mechanism, the appropriate paper tubes are allocatedto a finished product area, and the non-appropriate paper tubes are allocated to a waste area. According to the high-efficiency full-automatic paper tube measuring and sorting machine, the lengths ofthe paper tubes can be automatically measured, then screening and classification are performed, so that the labor intensity of workers and the production cost are greatly reduced, and the measuring precision and the production efficiency of the paper tubes are improved.

The invention relates to a method for determining the modulation degree of a ray digital image and an application thereof. Aiming at the problem that the subjective evaluation and objective evaluationof the X-ray digital images obtained by a micro-focus X-ray machine from PCB assemblies are inconsistent, the local image quality is accurately identified by calibrating the pixel edges of the recognized digital image and using the software transfer function algorithm. Based on this method, the application criteria of the image modulation degree Y and the image comprehensive evaluation index y are given. The experimental results show that the image comprehensive evaluation index and subjective evaluation result obtained by this method have high fitting degree, the problem of inconsistency between subjective judgment and objective judgment can be solved, and the drawbacks of artificial subjective judgment of image quality are effectively avoid.

The invention discloses a testing method of biological starting point temperature of cucumber seed germination, which comprises the following steps: (1) sampling the seed; (2) seeding the dried seed directly; (3) changing daily seed temperature to germinate slowly; (4) testing and correcting the germination; (5) calculating the daily even temperature and respective germination time of the seed under specific germination level; (6) calculating the theoretical value of biological starting point temperature. The invention has precision result and convenient operation, which reduces the working quantity.

The invention discloses an installation structure and an installation method for a perpendicularity sensor on an overlong square tubular column. The installation structure comprises a laser inclinometer internally provided with a perpendicularity sensor and a laser emitter, a regulating plate, a right-angled bending plate, a light target, a coarse tuning bolt component and a fine tuning bolt component, wherein the laser of the laser emitter is parallel to a measuring baseline of the perpendicularity sensor; through holes for emitting laser are correspondingly formed in a laser inclinometer connecting plate and the regulating plate; the position of the regulating plate is regulated by virtue of the coarse tuning bolt component and the fine tuning bolt component, so that the position of the laser on the light target is unchanged when the light target is arranged on different installation baselines, and the laser emitted after the laser inclinometer is installed and fixed is parallel to the axis of the square tube column. The installation structure can be used for solving the installation and positioning problem of the perpendicularity sensor on the square tube column in an automatic test method of the perpendicularity sensor, realizing the convenient and accurate detection of the square tube column, and realizing the real-time detection of the perpendicularity of the overlong square tube column.

The invention relates to a method for simultaneously measuring multiple physical parameters of a dielectric film. Physical parameters, such as defect density, dielectric constant and electron mobility, of a film are indirectly measured according to transmission current, electron beam induced current and surface potential under electron beam irradiation. According to the basic idea, the corresponding transmission current, electron beam induction current and surface potential are obtained through numerical calculation according to a given dielectric film, given electron beam irradiation conditions, trap density, electron mobility and dielectric constant; a non-linear relationship between the multiple physical parameters and the transmission current, the electron beam induced current and the surface potential is established based on an Elman artificial neural network; and finally, the transmission current, the electron beam induced current and the surface potential of a to-be-measured object are measured in an experiment, and finally multiple physical parameters are obtained through the Elman network. The method has the advantages of being reliable in measurement, high in measurement speed and low in measurement cost.

A surface roughness measuring unit according to the present invention includes a contact pin unit having a contact pin and a displacement detector, the contact pin being provided so as to project and retract through a through-hole of a skid and scanning and moving along a surface of a work piece, the displacement detector detecting displacement of the contact pin in a direction perpendicular to the work piece surface; a driver moving the contact pin unit forward and backward along the surface of the work piece; and a joint coupling the contact pin unit and the driver to a measurement head holder of a coordinate measuring system. The surface roughness measuring unit further includes a contact detector that detects contact of the skid on the surface of the work piece.

The invention discloses a comprehensive test tool for detecting the outer diameter of a stepped shaft and the inner hole of a gear, which belongs to the technical field of automobile part assembly size inspection. The comprehensive test tool comprises a positioning assembly used for stepped shaft positioning, a feeding assembly used for feeding the stepped shaft, an outer diameter measuring assembly used for measuring the outer diameter of the stepped shaft, and an inner hole measuring assembly used for detecting the inner hole of the gear. The positioning assembly, the feeding assembly, the outer diameter measuring assembly and the inner diameter measuring assembly are all installed on a bottom plate. The invention is advantageous in that the structure is simple, positioning is accurate,operation is convenient, and the measuring efficiency of the outer diameter of the stepped shaft and the inner hole of the gear is high.

The invention discloses an automatic feeding structure for measuring paper tubes with different diameters. The automatic feeding structure comprises an automatic feeding box, a continuous conveying mechanism, a material collecting groove, a different-diameter-paper-tube measuring mechanism, a material discharging groove, a continuous material receiving mechanism and an automatic material stirringand conveying mechanism which are sequentially arranged from left to right. The automatic feeding box is used for storing the paper tubes to be detected, and a discharging mechanism used for conveyingthe paper tubes to the continuous conveying mechanism is arranged at the right end of the automatic feeding box; the continuous conveying mechanism is used for continuously conveying the paper tubesconveyed by the discharging mechanism to the material collecting groove; the different-diameter-paper-tube measuring mechanism is used for detecting the lengths of the paper tubes in the material collecting groove and conveying the paper tubes to the material discharging groove; the continuous material receiving mechanism is used for receiving the paper tubes conveyed by the material discharging groove; and the automatic material stirring and conveying mechanism is used for sorting the paper tubes conveyed by the continuous material receiving mechanism. According to the structure, the assembly-line automatic measurement of the paper tubes with different diameters is realized, the labor intensity of workers and the production cost are greatly reduced, and the measurement precision and the production efficiency of the paper tubes are effectively improved.

The invention discloses a plant leaf fixing device for a single integrating sphere measurement system. The plant leaf fixing device comprises a first clamping piece, a second clamping piece and a clamping piece, the first clamping piece and the second clamping piece match each other and are used for clamping and fixing a plant leaf to be detected; and the clamping piece matches a reflectivity andtransmissivity measuring port of the single integrating sphere and is used for detachably fixing the plant leaf fixing device on the reflectivity and transmissivity measuring port of the single integrating sphere. When the plant leaf fixing device matches a single integrating sphere measuring system to measure the reflectivity and transmissivity of a plant leaf; when the plant leaf is transferredfrom the reflectivity measurement port to the transmittance measurement port, the plant leaf to be detected does not need to be taken down from the fixing device, and the fixing device with the plantleaf to be measured is directly transferred, so that mismatching of measurement points due to human factors is avoided, and the acquisition precision of spectral data of the plant leaf can be improved.