99 results about "BUN measurement" patented technology

An application debugging switch also monitors application performance. The application debugging switch forwards the requests from a first host to a second host, and later forwards the response coming from that second host to that first host. As most of the applications work in a request—response architecture, the application debugging switch can measure the response time of the application. The switch attaches a timestamp to each request that it forwards. When the response to that request comes to the switch, the switch can determine the response time of that application. The application debugging switch collects multiple samples of response time over a certain period of time. These samples provide a good measurement for the average application response time. The response time is a combination of the network response time and the application response time. The application debugging switch holds multiple measurement classes. Each class defines different sources or destinations of traffic (IP addresses and networks) and different applications (TCP/UDP ports or content identifiers in the requests). Collecting the response time for each class separately allows zooming in to an application and user that experience bad service and detect the reason for their failure.

Object of present invention to overcome a problem of a dispersion of an evaluation of gas barrier property depending on absorbed moisture of plastic, and carry out measurements in which a measurement value response is good and accuracy is good, wherein from the beginning of a container the gas barrier property of a plastic molded body does not depend on the amount of moisture absorbed thereof. A method of measuring the gas barrier property of the plastic molded body such as a plastic container, a plastic sheet or a plastic film or the like which uses a gas analyzer to measure the amount of permeation of a measurement object gas permeating through the plastic molded body, comprising: a heat drying process which heats and dries said plastic molded body in a temperature range which does not cause deformation or heat deterioration.

The invention relates to a self-capacitance change measuring circuit with high precision and high stability. A filter capacitor in a system discharges through a switch circuit of a measured capacitor and is charged through a switch circuit of a coupling capacitor so as to change the voltage of the filter capacitor at the vicinity of a reference voltage. As discharging current generated by the switch circuits of different measured capacitors is different, the time that the voltage of the filter capacitor is lower than the reference voltage and the time that the voltage of the filter capacitor is higher than the reference voltage change; and the change of the measured capacitor can be measured by measuring the time change or the change of a ratio of the time. By an error elimination method, the voltage fluctuation and the metering clock error do not influence the measuring result; and the entire measuring result is only related to the error of the coupling capacitor. As the coupling capacitor built in a chip has high stability and high precision, the measurement method has excellent measuring precision and stability.

This application relates to an apparatus and method for providing snapshot action thermal infrared imaging within automated process control article inspection applications. More specifically, it pertains to the use of snapshot mode lead salt area-array imaging sensors (20) as the imaging front-end in high-speed machine vision inspection systems (12). the relatively low-cost, good measurement sensitivity at temperatures consistent with thermo-electric cooling means, and the ability to be operated in snapshot mode enables lead salt-based image acquisition sensors (20) to be used in a variety of automated process control and article inspection applications.

A process for simultaneously measuring the velocity of terahertz electromagnetic radiation in a dielectric material sample without prior knowledge of the thickness of the sample and for measuring the thickness of a material sample using terahertz electromagnetic radiation in a material sample without prior knowledge of the velocity of the terahertz electromagnetic radiation in the sample is disclosed and claimed. The process evaluates, in a plurality of locations, the sample for microstructural variations and for thickness variations and maps the microstructural and thickness variations by location. A thin sheet of dielectric material may be used on top of the sample to create a dielectric mismatch. The approximate focal point of the radiation source (transceiver) is initially determined for good measurements.

A computer implemented process for simultaneously measuring the velocity of terahertz electromagnetic radiation in a dielectric material sample without prior knowledge of the thickness of the sample and for measuring the thickness of a material sample using terahertz electromagnetic radiation in a material sample without prior knowledge of the velocity of the terahertz electromagnetic radiation in the sample is disclosed and claimed. Utilizing interactive software the process evaluates, in a plurality of locations, the sample for microstructural variations and for thickness variations and maps the microstructural and thickness variations by location. A thin sheet of dielectric material may be used on top of the sample to create a dielectric mismatch. The approximate focal point of the radiation source (transceiver) is initially determined for good measurements.

The invention discloses a method and structure for collecting tiny dust particles and provides a method and structure for collecting tiny dust particles from a spacecraft orbit environment. By adopting the method, the charge-mass ratio of tiny dust particles can be measured quantitatively under the condition of simulating the spacecraft orbit environment, and the national mass in-situ monitoring sensitivity is increased to 1.10*10<-9> to 4.42*10<-9> g/cm<2>; a dust particle charge-mass ratio testing instrument is simple in structural design and mainly comprises a circular grid plate, a hollow cylindrical capacitor and a QCM (Quartz Crystal Microbalances), so that the accuracy of measured data is greatly increased in the testing process and the load using risk of a spacecraft orbit is lowered; in the method, the hollow cylindrical capacitor is used, the design size of the instrument is reduced and a signal acquisition circuit and an assembly box are used, so that the charge-mass ratio of tiny dust particles is well measured and the testing process is stable and reliable; and due to the adoption of the QCM, the mass change of passing particles is well measured, the testing process is stable and reliable and high reproducibility is achieved. The method and the structure have the characteristic of in-situ monitoring of the charge-mass ratio of particles in the spacecraft orbit environment, and are suitable for scale test, production, research and the like.

The invention discloses an online measurement device and an online measurement method of double-pressure difference gas-liquid flow rate. The online measurement device comprises a Venturi flowmeter; a gas-liquid pipe is arranged at one end of the Venturi flowmeter; the gas-liquid pipe is connected with a V-cone flowmeter through a connecting flange; a first pressure gauge is arranged at the front end of the Venturi flowmeter; a second pressure gauge is arranged at the throat part of the Venturi flowmeter; a fourth pressure gauge is arranged at the rear end of the V-cone flowmeter; a third pressure gauge is arranged at a position, between the fourth pressure gauge and the connecting flange, on the V-cone flowmeter. During an actual online gas-liquid flow rate measurement process, respective pressure differences of the Venturi flowmeter and the V-cone flowmeter in a pipeline are acquired and are transmitted into a processor; a gas-liquid two-phase flow rate measurement model is established in the processor; respective flow rates of a gas phase and a liquid phase are calculated and outputted according to the measured pressure differences and by combining the physical parameters of the pipeline and a fluid inputted through a human-computer interface; the online measurement device and the online measurement method have high measurement stabilities.

The invention provides a clamp used for tool wear detection, belongs to the field of tool detection devices, and relates to the clamp used for tool detection. The clamp is suitable for devices used for wear detection on tools for machining holes in carbon fiber reinforced composites. The clamp is composed of a tool clamping assembly, a support assembly, a rotating table assembly and a displacement working table assembly. A tool is accurately positioned and clamped through the tool clamping assembly. By means of the clamp, the small-range horizontal movement of a displacement working table in the X-Y plane is achieved in a manual mode, and rotation of three rotation assemblies in three axis directions is achieved in a manual mode. In the tool clamping assembly, a base is of a structure shaped like a Chinese character 'shan', a circular protrusion is arranged at the center of the base, circular holes are machined in the upper portions of the left side wall and the right side wall of the base respectively, annularly-carved base left side angle scales are formed in the top of the left side wall, and annularly-carved base right side angle scales are formed in the top of the right side wall. The clamp is simple in structure and convenient to operate, and the good measurement device is provided for accurate detection on tool wear.

The invention discloses a monolithic integrated full-decoupling triaxial silicon microgyroscope which adopts a square symmetric structure and mainly comprises a driving part, a driving detection part, a course angle detection part, a pitching angle detection part, an angle detection part, and corresponding coupling folding beams, wherein structures in four large square frameworks in the designed square symmetric structure are consistent, and the structural forms on two opposite edges are completely the same; the four large frameworks are connected through the coupling folding beams at four opposite angles. The monolithic integrated triaxial silicon microgyroscope disclosed by the invention can be used for simultaneously measuring angular speeds in the course direction, the pitching direction and the transverse rolling direction; furthermore, complete decoupling is realized among all modals through a reasonable structural design, so that high measurement performance is achieved.

The invention discloses a constant temperature integrating sphere spectral analysis device, comprising a sealed shell. The sealed shell is internally provided with a spectrograph and an integrating sphere; the spectrograph receives a light signal emitted from a detection window through a light sampling device; a temperature adjustment and control device is also arranged inside the sealed shell; temperature sensors are respectively arranged inside the integrating sphere and near the spectrograph; and the temperature adjustment and control device and the temperature sensors are electrically connected and used for adjusting and controlling the temperatures inside the integrating sphere, the spectrograph and the sealed shell. The constant temperature integrating sphere spectral analysis device can conveniently and effectively control the working environment temperature of the spectrograph and the temperature inside the integrating sphere, has little dependency on environment conditions of a laboratory, and realizes favorable measurement reproducibility easily and higher measurement precision.

A method for operating a soot sensor in the exhaust gas tract of an internal combustion engine. The soot sensor includes an inter-digital electrode structure to which a measurement voltage is applied. Soot particles from the exhaust gas flow deposit themselves on the inter-digital electrode structure and an measuring current is evaluated as a measurement for the soot concentration of the soot sensor. A heating element for burning clean the inter-digital electrode structure is provided. The method for operating the soot sensor has good measurement results and the shortest possible idle time. To this end, a point in time for burning clean the soot sensor is determined in accordance with the operational state of the internal combustion engine and then, the burning clean of the inter-digital electrode structure starts by heating the soot sensor by the heating element.

The invention relates to the technical scheme which is capable of realizing aiming, positioning and installing of an infrared thermometric optical probe on a small furnace cover of a coke oven flue. The technical scheme comprises a set of installing device and a set of aiming lever, wherein the integrated installing device is of a centripetal ball joint structure, and is capable of causing the infrared thermometric optical probe to aim and position a nose brick center for thermometry, and the aiming lever is an auxiliary aiming tool, and is capable of causing the measuring pointing direction of the installing device to aim the nose brick center in advance before the infrared thermometric optical probe is arranged; a simple, practical and effective heat insulation cooling measure is carried out on the small furnace cover, and thus installation personnel can perform high-precision aiming adjustment and rapid locking operation directly by hand; the infrared thermometer arranged on the small furnace cover is facilitated to be influenced less by the undesirable heat conduction from the bottom up, thereby being good in measure performance. The characteristics of the technical scheme is that an easy-to-implement, simple and effective new way is adopted, an engineering problem which has long been shunned and is not easy to solve is creatively solved; compared with the prior art, the industrial advancement, practicability and effectiveness are better.

The invention discloses a method for measuring a signal phase angle during frequency deviation of an electrical power system. The method is characterized by comprising the following steps of (1) sampling signals of the electrical power system; (2) mapping deviated pionic/4 of signals; (3) calculating percentage of the frequency deviation; (4) correcting the frequency deviation; and (5) calculating phasor quantity of signals of the electrical power system. The traditional discrete Fourier transform (DFT) phase angle measuring method is low in precision; and particularly, the phase angle errors of the discrete Fourier transform method are high under the condition of frequency disturbance. Dynamic phase angle errors in phase angle errors can be reduced as far as possible by using orthogonal properties of a coordinate axis in a coordinate system and a four-phase equilibrium relation; the dynamic phase angle errors are well corrected by the method; and the phase angle measurement accuracy is improved. By an algorithm, measurement capacity on electrical power signals with various interferences is high on the premise that the frequency tracking measurement precision is guaranteed.

The invention relates to a mutual capacitance variation measuring method with a high precision and a high stability. The system is composed of a switch discharge current source, a voltage follower and an impulse generator. The impulse generator generates an impulse waveform with a fixed length of time so that a detected mutual capacitance on a high clock edge is charged. If a voltage of a detected end is more than a reference voltage, the switch discharge current source discharges so as to reduce the voltage of the detected end until the voltage is lower than the reference voltage.<{EN4}>As for different discharge time periods of a switch current source caused by different detected mutual capacitances, the variation of the detected capacitances can be detected through measuring the variation of the time periods or the ratio variation of the time periods.<{EN5}>An error accumulation and mutual elimination method is applied by the circuit so that effects of an impact of a voltage fluctuation, an error of a measuring clock and an error of a detecting circuit itself on a measuring result are minimized to a lowest point. Therefore, the measuring method is great in measuring precision and stability. Because of the error accumulation and mutual elimination, the detecting circuit does not need a circuit with the high precision, and thus a simple circuit with the low power consumption can be adopted to realize. As for different discharge time periods of a switch current source caused by different detected mutual capacitances, the variation of the detected capacitances can be detected through measuring the variation of the time periods or the ratio variation of the time periods. An error accumulation and mutual elimination method is applied by the circuit so that effects of an impact of a voltage fluctuation, an error of a measuring clock and an error of a detecting circuit itself on a measuring result are minimized to a lowest point. Therefore, the measuring method is great in measuring precision and stability. Because of the error accumulation and mutual elimination, the detecting circuit does not need a circuit with the high precision, and thus a simple circuit with the low power consumption can be adopted to realize.

The invention provides a method for measuring the rotating speed of the main shaft of a wind turbine generator system and a mechanism for detecting the rotating speed pulse. A high speed counting module acquires the pulse signal of the main shaft rotating for a circle. A main controller calculates the rotating speed value when the main shaft rotates for a circle under the condition of each pulse period time and carries out software filtering processing. The software filtering processing is filtering too low rotating speed values and setting the rotating speed maximal change value when the main shaft rotates for a circle including acceleration and deceleration. The rotating speed maximal change value is compared with the difference of the rotating speed values corresponding to the present and the last pulse period. If the difference is larger than the rotating speed maximal change value, the present rotating value is invalid. The main controller processes the present rotating value to make it become a valid rotating value, thereby overcoming the influence from interferences such as vibrations and the like on the rotating value of the main shaft. According to the invention, a smooth rotating speed change value can be obtained. The invention has strong anti-vibration and noiseproof features, the use cost is lower than that of an increment type encoder and the invention is characterized by simple installation and good measuring precision.

The invention provides a pressure intensity sensing type wind power monitor. The monitor comprises a base, a fixed supporting rod extends above the base, a cuboid is fixed to the supporting rod, and the four side faces of the cuboid are orthogonal to the horizontal plane. Strain gages are pasted on the four side faces of the cuboid respectively and are electrically connected to an arithmetic device arranged inside the base, the arithmetic device figures out the wind speed and direction according to the sensing data of each strain gage, and monitoring results are displayed by a displayer. The pressure intensity sensing type wind power monitor can resist bad weather conditions, not be damaged easily, and keep good measuring precision for a long time.

The invention discloses a film radiant heat flow sensor and a manufacturing method thereof. The film radiant heat flow sensor comprises a foundation 1, a film thermocouple array 2 arranged on the foundation 1 and thermal resistance layers 3 arranged on the film thermocouple array 2, wherein the film thermocouple array 2 comprises more than two film thermocouples which are connected in series through outer connection points 11, the film thermocouple comprises an A electrode 9 and a B electrode 10 which are connected, two adjacent outer connection points 11 are provided with the thermal resistance layers 3, and two external connection ends of the film thermocouple array 2 are respectively connected with compensation leads 14 corresponding to respective electrodes through a bonding pad 13. The film radiant heat flow sensor employs the mature process and materials in the prior art, the production process is simple, cost is low, and the film radiant heat flow sensor further has property of excellent measurement precision.

A method for simply and reliable examining the weldability of a steel material, for example the oxidization scale of a hot-press steel material. (i) Two measurement terminals that can be pressed under a constant pressing pressure of 8.7 to 208 N/mm<2> are pressed against a member made by a hot-pressing a hot-rolled steel sheet (cold-rolled steel sheet), a constant current of 30 A or less is made to flow between the measurement terminals to measure the voltage between the measurement terminals. (ii) The steel material is subjected to a spot-welding test, and it is judged that this welding is acceptable or not. (iii) With reference to the voltage between the measurement terminals measured about the steel material judged as acceptable, a range of the voltage or resistance between the measurement terminals leading to favorable result of the spot-welding test is determined. (iv) The voltage between the measurement terminals about a steel material is measured in spot welding of actual operation, the spot weldability of this steel material is predicted and judged according to whether the measured voltage value is within the range.

Controlling a multiple-array, sheetmaking cross-directional process with a multivariable model predictive controller (MPC) employs a cost function incorporating a prediction horizon. The MPC provides a measurement profile target reference trajectory over the prediction horizon of the MPC cost function. Improved CD-MPC performance is achieved by employing a measurement profile target reference trajectory over the prediction horizon in the MPC cost function. A series of target profiles creates a reference trajectory to bring the cross-direction measurements smoothly from their current profile to the final target. By carefully designing the reference trajectory, the CD-MPC exhibits a good measurement response without aggressive control action. The current measurement target profile can be filtered through a first order plus deadtime process at each controller update and repeating the filter operation once for each step of the MPC prediction horizon generates a full reference trajectory for the profile.

The invention discloses an optical fiber grating temperature sensor. The sensor comprises an optical fiber, a quartz tube and a ceramic cap. A regeneration optical fiber grating is prepared by conducting high-temperate annealing of 1,000 DEG C on a common optical fiber grating, before annealing, the optical fiber grating is subjected to high-temperate tubular encapsulation at first, an inner layerof an encapsulation structure is the quartz tube, an outer layer is the ceramic cap, the optical fiber grating is arranged at the top of the encapsulation structure, and the other end is bonded and fixed by adopting high-temperate glue. According to the high-temperature optical fiber grating temperature sensor with high reliability and stability, application of the optical fiber grating temperature sensor in the high-temperature environment of 1,000 DEG C is successfully achieved, and the sensor has high measurement precision and high-temperature stability and is suitable for temperature measurement in the high-temperature fields such as aeronautics and astronautics, petroleum electric power and chemical industry smelting.

The invention is a special purpose hoist control desk of marine instrument on ship. It consists of control valve with a handle and the main desk body on the shell. It features that a device used for limiting the position of the handle linked with the device is installed on the shell on the desk which stops to locate at any moment. The device consists of a pole with teeth fixed on the handle and a stop board with holes fixed on the desk. The above teeth pole is inserted into the hole on the board. The invention has rational structure, easy handling, not only lowers the labor intensity greatly but ensures the stability and safety of this instrument so to gain ideal measurement.

The invention discloses a wide-working-frequency-band reflective electrical thickness test method, and belongs to the technical field of testing. Through the combination of equivalent half space medium load and waveguide magic T, automatic counteraction of mismatch reflection on the outer surface of a tested antenna housing is achieved; a reflected signal component containing IPD information is transmitted to an opposite-direction port and is naturally isolated from a same-direction port, and the reflection measurement is converted into transmission measurement, so that the measurement difficulty is reduced; an engineering application problem of a reflective electric thickness measurement method is solved, and good measurement linearity is provided.

The invention provides a device and method used for measuring end face turning temperature and belongs to the technical field of machining. The device and method are suitable for measuring temperature of a turning area during end face turning. The device comprises a thermocouple sensor, a slip ring and an experimental work piece which is specially designed, wherein the experimental work piece is a material product with turning temperature to be measured, annular ribs designed on the experimental work piece can convert end face turning into cylindrical turning, the thermocouple sensor can be reasonably buried in the work piece by designing a through hole and a blind hole, and safety of a turning process and signal stability are improved. Meanwhile, interference among devices is eliminated by the slip ring structure, temperature signals can be collected by a data collecting card through the slip ring and transmitted to a computer, and finally, more accurate end face turning temperature can be obtained. The device disclosed by the invention has a simple structure and is convenient to operate, and good measurement device and method can be used for achieving accurate measurement of end face turning temperature.