58results about How to "Accurate measurement" patented technology

The invention provides a method and a device for measuring pulling-out smoothness of push-in type tubular fabrics. The device for measuring pulling-out smoothness of the push-in type tubular fabrics is characterized by comprising a heat pipe mechanism, a plunger mechanism, a plunger push-in mechanism and a fixing mechanism. The plunger push-in mechanism comprises a step motor, a transmission mechanism, a left screw rod and a right screw rod, and a middle beam sleeves the left screw rod and the right screw rod. The heat pipe mechanism comprises a heat pipe, press sensors and a T-shaped connector, and the tubular fabrics can sleeve the outer wall of the heat pipe. The step motor is capable of driving the left screw rod and the right screw rod to rotate synchronously through the transmission mechanism to further drive the middle beam to move upwards, so that the tubular fabrics which sleeve the outer wall of the heat pipe can be drawn back and pushed into the heat pipe. The method and the device can be used for measuring pulling-out smoothness of the tubular fabrics sleeving the heat pipe under different temperature conditions, and structural simplicity, mechanism delicacy and simplicity, convenience and quickness in measurement are realized.

The invention discloses a base station positioning method based on a high-precision time synchronization network, and belongs to the field of navigation positioning. The method comprises the following steps: acquiring absolute time or relative time difference of transmission of radio waves between a terminal to be positioned and at least three base stations; obtaining spatial coordinate information of the base station in a preset coordinate; calculating a relative distance or a relative distance difference between the terminal to be positioned and the base station according to the absolute time or the relative time difference; according to the relative distance or the relative distance difference and the space coordinate information and a preset strategy, obtaining position information of a to-be-positioned terminal; and constructing an optical fiber tree topology structure network between the base stations. According to the method, the time synchronization error of a slave clock and a master clock is adjusted; the time synchronization of the slave clock and the master clock is realized, the time synchronization precision of the base station is improved, the subnanosecond level is reached, when the distance difference between the base station and the to-be-positioned mobile terminal is obtained through positioning calculation, the time value measurement is more accurate, the centimeter-level positioning error can be realized, and the positioning precision is greatly improved.

The invention provides an apparatus and method for measuring the resistivity of wafers. The apparatus for measuring the resistivity of the wafers comprises a measuring head disc, measuring heads, displacement rods and a rotary motor; the measuring heads are arranged on one surface of the measuring head disc; the measuring heads are divided into a first group of measuring heads and a second group of measuring heads; the radius of curvature of the heads of the second group of measuring heads is larger than that of the heads of the first group of measuring heads; the displacement rods are arranged between the measuring heads and the measured measuring head disc; the rotary motor is arranged at the other surface of the measuring head disc; after the first group of measuring heads is utilized to measure a film on the surface of a wafer to be measured for the first time, initial results are analyzed; if the initial results are abnormal, it is indicated that the first group of measuring heads puncture the film on the surface of the wafer to be measured, and the second group of measuring heads of which the heads having larger radius of curvature is utilized to measure the wafer to be measured for the second time, and the second group of measuring heads has little possibility of puncturing the film on the surface of the wafer to be measured, and therefore, accurate measuring results can be obtained.

A method is provided to quantify and/or qualify psychological and physiological components of stress in mammals, in which a stimulus can be applied to the test subject's environment during the test. The method involves the steps of measuring one or more physiological and/or psychological characteristics before and after the administration of a stimulus to a test subject. The stimulus may consist of any product, task, aroma or the like that elicits a stress-related response upon administration. By analyzing the resulting measurements, and optionally comparing physiological and psychological characteristics where both are measured, an overall level of stress may be determined. The method of stress measurement may further be used in product development and/or testing.

The invention discloses a photoetching overlay value calibration method. The photoetching overlay value calibration method comprises 1, providing a measurement wafer, wherein the measurement wafer comprises a measurement uncompensated overlay zone and at least one measurement compensated overlay zone, the measurement compensated overlay zone is provided with a first groove, an epitaxial layer is deposited in the wafer and the first groove, the epitaxial layer is provided with a second groove corresponding to the first groove and deposition offset is formed between the first groove and the second groove, 2, measuring deposition offset of the at least one measurement compensated overlay zone, 3, providing a wafer to be calibrated, wherein the wafer to be calibrated is provided with an uncompensated overlay zone to be calibrated and at least one compensated overlay zone to be calibrated, and 4, according to the deposition offset, carrying out compensation on the overlay measured data of the corresponding compensated overlay zone to be calibrated so that compensated overlay measured data is obtained. The photoetching overlay value calibration method solves the problem that the prior art cannot control overlay calibration of an edge part of the wafer.

The invention discloses a high-safety heat source collection system for a low-temperature waste heat power generation system. The high-safety heat source collection system comprises a heat source collection tank, a power system body and a self-release pressure relief valve body; the heat source collection tank is externally wrapped with a heat preservation layer, and the side surface of a tank body of the heat source collection tank is provided with a heat source inlet and a pressure relief port; the heat source output end of the power system body is in butt joint with the heat source inlet, and the power system body is used for delivering a heat source in a storage device storing the heat source into the heat source collection tank; and the self-release pressure relief valve body is mounted on the pressure relief port and is used for releasing gas in the heat source collection tank to reduce internal pressure. The high-safety heat source collection system has the advantages of being sufficient in heat source collection power, small in heat source storage heat loss and high in heat source storage safety.

The invention relates to a method for measuring infrared transmittance of fabric, which comprises the following steps: vertically and downwards placing a hot plate instrument at a certain inclined angle, heating to a constant temperature, and measuring the radiation temperature of the center of the hot plate of the hot plate instrument; placing fabric on a bracket, covering the fabric on the top surface of the bracket, attaching the bottom surface of the bracket to the upper surface of the hot plate instrument for quick installation, and immediately measuring the radiation temperature of the fabric surface after the installation, wherein the peripheral surface of the bracket is provided with vent holes; and calculating the infrared transmittance of the fabric according to the measured radiation temperature of the center of the hot plate and the radiation temperature at the surface of the fabric. The invention can improve the accuracy of the measurement of the infrared transmittance ofthe fabric.

The invention discloses a calibration method for a tire balance system. The calibration method comprises the following steps of acquiring vector data AO of a first pressure sensor and vector data BO of a second pressure sensor in the state when a main shaft is idling; arranging a tire on the main shaft to obtain a distance distA between the tire and a measuring scale, the tire width wid, the tireradius R, and a distance distB between the first pressure sensor and the second pressure sensor; rotating the main shaft to acquire vector data A1 and B1; loading a balance block with the mass of m1 on the inner side surface of the tire, and rotating the main shaft to obtain vector data A2 and B2; transforming the position of the balance block to obtain vector data A3 and B3; recording third position data Delta acquired by a grating disk; and finally, calculating to obtain calibration parameters K1, K2, K3, K4 and K5 according to the above data. According to the calibration method for the tirebalance system provided by the invention, the amount of unbalance of a measuring shaft is eliminated, so that the measurement becomes accurate; and meanwhile, the technological requirements for mechanical production are reduced, and the large-scale production is facilitated.

An improved relative humidity sensor apparatus that provides a more accurate measurement of humidity in the presence of water condensation. A series capacitive sensor includes a thin porous platinum top plate, a humidity sensitive polyimide dielectric, and two metal bottom plates on a semiconductor substrate. The two capacitors can be wired in series such that the metal bottom plates form independent, electrically driven connections. The thin top layer can form a top plate. Changes in humidity affect the humidity sensitive dielectric thereby causing changes in the capacitive value. A P-well layer and a P-plus layer can be added at the perimeter of the substrate to create a path for a parasitic capacitance caused by water condensation to connect to one or more connection nodes, thereby preventing erroneous measurements of humidity in the presence of water condensation.

The invention discloses a device for measuring the liquid absorption coefficient under the condition of an external electric field. The device comprises an incident light source, a sample pool, a power supply, electrode plates and a measuring unit, wherein the sample pool is of a transparent rectangular structure; in addition, the thicknesses of each side edge are equal; the electrode plates comprise a first electrode plate and a second electrode plate which are mutually parallel; the first electrode plate is fixedly arranged at the inner side of the first side edge of the sample pool and is connected with the positive electrode of the power supply; the second electrode plate is fixedly arranged at the inner side of the second side edge of the sample pool and is connected with the negative electrode of the power supply; the incident light source is arranged at the outer side of the third side edge of the sample pool; generated incident light rays are incident along the direction vertical to the electric field through a light transmission hole formed in the third side edge; the measuring unit is arranged at the outer side of the fourth side edge of the sample pool and is positioned on a light path of the incident light rays; the third side edge and the fourth side edge are mutually parallel. The device has the advantages that the electrode plates are arranged in the sample pool; the uniform electric field can be exerted on liquid to be tested, so that the change of the liquid absorption coefficient under the effect of the external electric field is accurately measured.

The invention discloses a ball hinge capable of detecting a spatial revolution angle. A traditional ball hinge is complex in angle measurement way and difficult to ensure high measurement precision. A ball socket annular slot is formed in a ball socket of the ball hinge; two ball head annular slots are formed in a ball head; four sliding block components are arranged between the ball socket and the ball head, and each sliding block component comprises a pin shaft and two arc-shaped sliding blocks which are supported at two ends of the pin shaft through a bearing; the arc-shaped sliding block at the outer end of each sliding block component is in sliding connection with the ball socket annular slot, and the arc-shaped sliding block at the inner end of each sliding block component is in sliding connection with the corresponding ball head annular slot; first grid-like cylindrical surface capacitance electrodes are arranged at bottoms of the ball socket annular slot and the ball head annular slot, and a second grid-like cylindrical surface capacitance electrode and a third grid-like cylindrical surface capacitance electrode are arranged at the outer end of the arc-shaped sliding block which is opposite to the ball socket annular slot and at the inner end of the arc-shaped sliding block which is opposite to the ball head annular slot; and voltage is loaded on the first grid-like cylindrical surface capacitance electrodes. The ball hinge disclosed by the invention can realize online measurement of the spatial angle of the ball hinge in three degrees of freedom.

The invention relates to the technical field of organic synthesis, and particularly relates to a synthetic method of isophorone diisocyanate. According to the method, isophorone diamine and triphosgene are taken as materials to react; and phosgene or diphosgene in the past is replaced by triphosgene to react with the isophorone diamine, so as to prepare the isophorone diisocyanate. Therefore, the synthetic method is simple and reasonable in manufacturing process, safe and reliable to operate, high in reaction yield, low in production cost and easier to achieve industrial production; the operation environment is improved; and the environmental pollution is also reduced.

The invention discloses a length meter, which comprises a body and two groups of length metering wheels parallelly arranged between two side walls of the body. Each length metering wheel group is composed of two cones, vertexes of the two cones are coincident and the center lines are coincident; an oblique rolling groove is opened from the upper surface downwardly in the body; the rolling groove matches a pressing wheel shaft; a pressing wheel is arranged on the pressing wheel shaft; two ends of the pressing wheel shaft are provided with knobs respectively; a coded disc encoder is arranged beside the knob at one end; the pressing wheel shaft performs vertical oblique movement along the rolling groove; and a display instrument is arranged on the body. When the length meter is adopted, a measured object can be restrained on the length metering wheels formed by the two cones, the diameter of the measured object is increased or decreased, a pressure shaft only needs to be ejected, the knobs screw and fix the pressing wheel shaft, the height of the pressing wheel can be automatically adjusted, length measurement of line-shaped, tube-shaped and strip-shaped objects can be met, and the length meter has the excellent advantages of simple structure, convenient operation and accurate measurement.

The invention discloses seven-layer melt-coextrusion stone paper and a preparation method therefor. The seven-layer melt-coextrusion stone paper comprises a reinforcing layer, foamed layers, cover layers and printed layers, wherein the foamed layers, the cover layers and the printed layers are sequentially arranged on two outside surfaces of the reinforcing layer from inside to outside. The method comprises the steps of preparing the printed layers, the cover layers, the foamed layers and the reinforcing layer, carrying out extrusion foaming on melt jelly of all the extruded layers through the same die head, and carrying out conventional three-roller calendering, cooling, drawing and winding, thereby obtaining the seven-layer melt-coextrusion stone paper. The stone paper prepared by adopting the method is good in stiffness, good in printing adaptability, low in specific weight, high in nontransparency, good in smoothness and uniform in thickness, and various performance indexes meet the art post paperboard performance index requirements of GB/T22806-2008, so that the stone paper can be used for printing art prints, cards, business cards, packaging cartons and the like and has a relatively good popularization and application value.

The invention discloses a ground penetrating radar in a device for measuring a primary support with a measuring wheel, comprising a ground penetrating radar and a measuring wheel, wherein a signal acquisition device is mounted on the measuring wheel, and the signal acquisition device is connected to the ground penetrating radar; the drive shaft of the measuring wheel is connected to one end of a damping hinge horizontally fixed to the top of the ground penetrating radar through a telescopic link, the other end of the damping hinge is connected to the ground penetrating radar; the telescopic link can rotate with the drive shaft; the drive shaft is also connected to the side wall of the ground penetrating radar through a horizontal elastic device; the elastic device, the telescopic link andthe ground penetrating radar form a triangle, so that the measuring wheel forms a stable system with the ground penetrating radar during the traveling process to measure; and the signal acquisition device mounted on the measuring wheel is connected to the ground penetrating radar.

The invention relates to a method for measuring an instantaneous tuning spectrum of a semiconductor laser. The method comprises: a photoelectric amplification detector receives a laser heterodyne voltage signal of a short-delay self-heterodyne measuring system under sawtooth wave current tuning and the signal is sent to a digital oscilloscope for storage; layering is carried out on the obtained laser heterodyne voltage signal; an instantaneous output power of a laser is calculated by using a direct-current voltage and a conversion coefficient of the photoelectric amplification detector; an instantaneous frequency of a carrier signal is determined and an instantaneous output wavelength of the laser is calculated; a line type and an instantaneous line width of an output signal of the laser are determined by a noise signal; and on the basis of the obtained instantaneous output optical power, light wavelength, and line type and line width, an instantaneous tuning spectrum is simulated. With the method, the d instantaneous output optical power, the light wavelength, and the line type and the line width during the tuning process can be obtained simultaneously; and the instantaneous tuning spectrum also can be simulated by using the instantaneous parameters. Therefore, an objective of precise measurement is achieved. Moreover, the method is simple and reliable; and the accuracy is high.

In order to overcome the defects in the prior art, the invention aims at providing an application system for subdural hematoma volume calculation with the advantages that the intracranial hematoma volume can be accurately measured, the time consumption is low, and the money consumption is low. The application system has the technical scheme that the application system for subdural hematoma volume calculation comprises an information measurement input module, a hematoma volume calculation module and a hematoma volume output module. A control method is characterized in that a VB (visual basic) program is compiled on the basis of a polygon formula, points are drawn on a CT (computed tomography) image, each layer of CT approximates to a polygon, then, the area of each layer of CT image is calculated by utilizing the compiled program, and the volume of each layer is further calculated through multiplying the area by the thickness and the CT image proportion,.

The invention discloses a method for determining the content of Caulis Spatholobus in Kangfuling Capsules, which is a high-performance liquid chromatography with acetonitrile-water=35-40:65-80 as the mobile phase, using formononetin reference substance as the contrast Law. The method for determining the content of Spatholobus Spatholobus in Kangfuling Capsules provided by the invention has good peak shape and high degree of separation in the high-performance liquid chromatogram, no interference from the negative control, and can realize rapid and accurate determination of the content of Spatholobus Spatholobus; and The method has strong specificity, high precision, good repeatability, high recovery rate, high stability, and accurate measurement results, which improves the quality inspection standard of Kangfuling Capsules and further ensures the stability of product quality and the safety of clinical medication ,efficient.

The invention belongs to the technical field of dielectric loss measuring, and discloses an internal water cooling generator stator winding dielectric loss measuring device and method. The device comprises a high-voltage series resonance unit, a dielectric loss measuring unit, a high-voltage standard capacitor unit and a dielectric loss control unit; the high-voltage input end of the dielectric loss measuring unit is connected with the positive electrode of the high-voltage series resonance unit, the standard capacitance end of the dielectric loss measuring unit is connected with the positive electrode of the high-voltage standard capacitor unit, and the test sample output end of the dielectric loss measuring unit is connected with the input end of an internal water cooling generator stator winding test sample; the two current measuring ends of the dielectric loss control unit are connected to the two ends of a ground resistor respectively, and the dielectric loss measuring unit is in wireless connection with the dielectric loss control unit; the negative electrode of the high-voltage series resonance unit and the negative electrode of the high-voltage standard capacitor unit are connected with the grounding end of the internal water cooling generator stator winding test sample separately. The device can precisely measure dielectric losses of the internal water cooling generator stator winding.

The invention discloses a multi-path signal unipolar square wave modulated single-path synchronous collection device and method. The collection device collects N paths of signals by a single-path analog-digital converter, and specifically comprises that the connection and disconnection of at least two switch circuits are controlled by square waves, at least two paths of measured signals pass through a switch circuit consisting of an analogue switch and a resistor, and the switch circuit achieves chopping amplitude modulation; the signals with different frequencies after amplitude modulation are added by an add operation circuit, and then subjected to the analog-digital conversion of the single-path analog-digital converter to obtain a digital signal; the multi-path signal unipolar square wave modulated single-path synchronous collection device and method achieve that the multi-path measured signals are synchronously collected by the single-path analog-digital converter, and has the characteristics of being simple in circuit, low in cost and accurate in measurement.