59results about How to "Easy to measure online" patented technology

The invention pertains to the technical field of fluid measurement, which relates to a slit Venturi throttle device, including an entrance, a contraction section, a slit section, an expansion section and an exit which are connected sequentially, the contraction section is a section of long narrow pipeline, the cross-section of the contraction section takes a shape of a long narrow rectangle, and the area of the cross section thereof is smaller than the area of the cross sections of the entrance and the exit. The invention also provides a two-phase flow measurement system which adopts the throttle device. The Venturi throttle device and the two-phase flow measurement system which are provided by the invention can effectively eliminate the influence of the friction pressure drop on the measurement, the devices can be applicable to the different gas-liquid two-phase media, different pipeline materials and other working conditions, and the factors which are related with the friction force and affect the measurement can be reduced or eliminated. The invention makes use of the gravity potential pressure difference pulse signals and the time equalization signals which are perpendicular to the horizontal flow direction, at the same time, the invention can avoid the influence of the frictional resistance and accurately identify the flow type and measure the fraction rate, furthermore, the implementation is simple and convenient.

The invention discloses a laser adjustable multipurpose measuring device and a measuring method thereof. The measuring device comprises an adjustable laser transmitter mounted on a machine tool, transition sleeves arranged in two ends of a measured hole, a forward laser receiver and a reverse laser receiver which are respectively arranged in the transition sleeves. The method comprises the following steps: firstly, levelling the base plane of the measured hole and the machine tool; fixing the adjustable laser transmitter on a main shaft of the machine tool; regulating the laser beam of the laser and the stretching direction of the main shaft of the machine tool on the same straight line; moving the main shaft of the machine tool to the approximate central position of the measured hole; inserting the forward laser receiver and the reverse laser receiver into the transition sleeves; and then inserting the transition sleeves to two sides of the measured hole, and respectively reading thenumerical value of the forward laser receiver and the reverse laser receiver, thus the verticality or concentricity of the measured hole relatively to the base plane is obtained. According to the invention, the verticality of a deep hole and the base plane and the concentricity of the stretching direction of the main shaft of the machine tool and the hole axis line can be convenient and efficientto measure on line and the product quality can be ensured.

The invention relates to a tobacco processing technology, in particular to a method of measuring tobacco shred filling value on line by utilizing a weighting method. The technical problem solved by the invention is that the method can automatically measure the tobacco shred filling value on line, is stable, reliable and free of harm, and is simple, convenient and easy to operate, and has measuring accuracy. In order to realize the aim, the invention provides a method of measuring tobacco shred filling value on line, which can obtain the tobacco shred filling value by measuring the instant weight of tobacco shreds on line and utilizing the corresponding relationship between the weight or the variation and the filling value. The traditional method of measuring the tobacco shreds on line is overturned, and the tobacco shred filling amount can be conveniently, fast, stably and reliably measured accurately without harm.

The invention relates to a device for measuring three-dimensional distribution of a radiated and scattered optical field. The device is characterized in that: an adjustable diaphragm 6 is positioned on the bottom of the device; a drilled semispherical shell 1 is positioned on the adjustable diaphragm 6; a drilled disc 3 is positioned on the drilled semispherical shell 1; the drilled disc 3 and the drilled semispherical shell 1 are connected by a plurality of fibers; a lens 5 is positioned on the disc 3; a CCD camera 4 is positioned on the lens 5; a beam splitter mirror 9 with 45 degree angle between a normal line and a main shaft of the device is fixed between the drilled disc 3 and the lens 5; a light source system 7 is positioned on one side of the beam splitter mirror 9 ; and a light source power monitor 8 coaxial with the light source system is positioned on the other side of the beam splitter mirror 9. The device has the advantages that: the fibers and the area array CCD camera can rapidly measure the spatial distribution of a light source radiation optical field or a scattering optical field of the object surface; in the process of the optical scattering measurement, the light source power monitor is utilized to carry out real-time monitoring to the output power of the light source, thereby avoiding the influence of the light source output stability on a measuring result.

The invention specifically relates to a detection method and apparatus for the cleanliness of a photovoltaic panel, belonging to the field of detection technology for the cleanliness of solar photovoltaic panels. The method detects the cleanliness of the photovoltaic panel by measuring the intensity of modulated laser beam signals scattered by the photovoltaic panel. The matching apparatus comprises a cleanliness sensor and a signal processing device. The cleanliness sensor comprises a laser, a modulation device, a convergent lens and a detector and is mainly used for accomplishing collection of scattered light and photoelectric conversion; and the signal processing device comprises a DC regulated power supply, a signal processing circuit, a microprocessor and a communication circuit and mainly used for AD conversion, amplification and transmission of electrical signals. The detection method and apparatus have the advantages of high measurement precision, simple structure, cost performance, practicability, easiness in operation, strong anti-interference capability, capacity of easily realizing on-line measurement, etc.

The invention discloses a rotating blade dynamic stress measurement method and a rotating blade dynamic stress measurement system based on blade end timing. The rotating blade dynamic stress measurement method comprises the following steps of: establishing a three-dimensional finite element model of a to-be-measured rotating blade, and extracting modal parameters of the three-dimensional finite element model; determining a number and axial mounting positions of blade end timing sensors; constructing a conversion matrix of blade end finite position displacement and full-field dynamic stress, and establishing a conversion matrix of blade end finite position displacement to full-field equivalent stress; acquiring a blade end limited position displacement signal of the rotating blade based onthe blade end timing sensors; and acquiring dynamic stress of the rotating blade at any moment, at any position and in any direction based on the conversion matrix by the blade end limited position displacement signal, and acquiring equivalent stress of any unit of the rotating blade based on the conversion matrix by the blade end limited position displacement signal.

The invention belongs to the field of the modern optical measurement technology, and particularly relates to a subaperture jointing laser interference on-line measuring method and a subaperture jointing laser interference on-line measuring system based on an intelligent digital control platform. The subaperture jointing laser interference on-line measuring system comprises an industrial robot and control modules thereof, a driving module, a transient interferometer, a jointing and data analyzing system, a human-computer interaction interface and a workbench. Originally, the industrial robot performs polishing on optical elements through polishing components mounted on the wrist portion of the industrial robot. The transient interferometer is mounted on the wrist portion of the industrial robot through a flange according to the standard the same as a polishing head, so that precision measurement can be performed on each subaperture surface shape of a workpiece surface, and the jointing and data analyzing system is utilized to measure the surface shape of the overall workpiece surface. The subaperture jointing laser interference on-line measuring method and the subaperture jointing laser interference on-line measuring system based on the intelligent digital control platform are low in production cost, good in commonality and convenience, and can measure various kinds of surface shapes on line.

The invention discloses a rotary blade displacement field inversion reconstruction method and system, and the method comprises the following steps: building a three-dimensional finite element model ofa to-be-measured rotary blade, extracting modal parameters of the three-dimensional finite element model; arranging a plurality of strain gages on the rotating blade, determining the number, positions and directions of measuring points of the strain gages; constructing a conversion coefficient matrix of the strain gauge measuring point dynamic strain and the full-field displacement; and measuringthe dynamic strain of the corresponding position of the rotating blade based on the strain gauge, wherein the dynamic strain is reconstructed based on the conversion coefficient matrix to obtain thedisplacement of the rotating blade at any time, at any position and in any direction. According to the method provided by the invention, the reconstruction of the overall displacement field of the rotating blade is realized only by using extremely few measuring point strains, the measurement of blade surface vibration can be realized, the measurement of blade internal node vibration can be realized, the calculation process is simple, the measurement precision is high, and the online measurement is easy.

The invention discloses a rotor blade dynamic stress reconstruction method and system, and the method comprises the following steps: building a three-dimensional finite element model of a to-be-measured rotor blade, and extracting modal parameters of the three-dimensional finite element model based on a grid unit; determining the number, installation positions and directions of a plurality of strain gauges arranged on the rotor blade; respectively constructing a conversion matrix of strain gauge measuring point unit dynamic strain and blade integral unit stress field and a conversion matrix ofstrain gauge measuring point unit dynamic strain and blade integral unit equivalent stress field; measuring the dynamic strain of the corresponding position unit of the rotor blade based on the strain gauges; and obtaining the dynamic stress and equivalent stress of the rotor blade at any time, at any position and in any direction based on the conversion matrix according to the measured dynamic strain.

The present invention discloses an alpha and beta particle activity detection device which comprises a scintillating fiber bundle which comprises a plurality of spaced scintillating fibers, first and second photomultiplier tubes for receiving photons from the scintillating fibers and converting the photons into an electrical signal, first and second photomultiplier tube additional circuits for supplying power to the first and second photomultiplier tubes and amplifying an electrical signal, first and second output ends, and a sealing component. According to the device, the number of the photomultiplier tubes can be reduced, the volume of an overall detection system is reduced, the online measurement of total alpha and total beta activity in water is easily realized, the cost is low, the effective measurement area is large, and the online radioactivity measurement need of drinking water is satisfied.

The invention discloses a laser six-degree-of-freedom kinematic error synchronous measurement system which is of a transceiving integrated structure formed by a fixed unit and a movable measurement unit, the fixed unit is installed on a fixed plane, the movable measurement unit is installed on a linear displacement platform, and a laser is used as a light source. A four-quadrant photoelectric detector and a two-dimensional position detector are used as detection devices to realize simultaneous measurement of a pitch angle, a deflection angle, a roll angle, horizontal straightness, vertical straightness and displacement of the linear displacement platform. The influence of light beam angle drift on the pitch angle, deflection angle, roll angle, horizontal straightness, vertical straightness error and displacement measurement precision is effectively eliminated by arranging the light beam angle drift detection module; the device is simple in structure and low in cost, and online measurement of the six-degree-of-freedom motion error of the linear displacement platform can be achieved at the same time.

An open-close torque sensor of the invention belongs to the torque sensor technical field. The problem to be solved is to provide a torque sensor with a sensitive beam arranged in the sensor, which adopts a slip ring technology and is used for measuring the torque of a high speed and heavy load shaft. The adopted technical scheme is that two semicircle annular main bodies with the same structure are symmetrically fixed to a transmission shaft through screws. The structure of the main bodies is that the upper end and the lower end of the inner lateral of an external half casing are all equipped with fastening semi-rings. An inner semi-ring is fixed between the fastening semi-rings. The external end of the inner semi-ring is equipped with a small insulation semi-ring, a small conductive semi-ring, a large conductive semi-ring and a large insulation semi-ring from inside to outside. A groove on the inner end of the inner semi-ring is fixed with amplifying and converting elements. The end surfaces of the fastening semi-rings are fixed with connecting semi-rings. A sensitive beam is arranged between the connecting semi-rings. The lateral of the sensitive beam is fixed with a strain gauge. The connecting semi-rings are connected with matching semi-rings. The inner surfaces of the matching semi-rings are in contact with the transmission shaft. The invention can be widely applied to various axial torque measuring fields.

The invention discloses a non-contact dynamic strain field measurement method for a rotary vane, and a system thereof. The method comprises the following steps that: establishing the three-dimensionalfinite element model of a rotary vane to be measured, and extracting the modal parameter of the three-dimensional finite element model; determining the number and the axial installation positions oftip-timing sensors; constructing a transfer matrix of finite measurement point displacement and an integral strain field; and on the basis of the tip-timing sensors, obtaining the finite position displacement of a rotary vane tip, wherein the dynamic strain obtains the dynamic strain of the rotary vane at any moment, any position and any direction on the basis of transfer matrix modal processing.By use of the method, tip finite measurement point displacement is used for realizing the reconstruction of the integral strain field of the rotary vane, the measurement of the dynamic strain of the vane surface can be realized, and the measurement of the positive strain and the shearing strain of the internal node of the vane can be realized. The method has the advantages of simple calculation process, high measurement accuracy and easiness in online measurement.

The invention provides an online pH measurement device of a high-temperature strong-washing neutralization solution. The device comprises a measuring sampling tube, a pH meter, a pneumatic telescopicprotecting sleeve for fixing the pH meter and a cleaning control device, wherein a water inlet, a water outlet, a testing hole and a drain outlet are formed in the measuring sampling tube; the pH meter is fixedly arranged on a push rod of the pneumatic telescopic protecting sleeve; the pneumatic telescopic protecting sleeve is arranged at the testing hole and detachably connected with the measuring sampling tube, and a washing water inlet and a washing water outlet are formed in the pneumatic telescopic protecting sleeve; the washing water inlet is connected with clear water through a water pipe, a washing water electromagnetic valve is arranged at the washing water inlet, and the washing water outlet is connected with a trench through a water pipe; the cleaning control device comprises aDCS control system, and the DCS control system is provided with a main relay and a cleaning relay. Online measurement of the high-temperature strong-washing neutralization solution is realized, and the device is simple in structure, capable of performing automatic cleaning, convenient to operate, long in online testing time, stable in operation and accurate in measurement result, can reduce blocking and provides convenience for environment-friendly drainage.

The invention discloses an on-line measurement device for a shallow-spigot part with a shaft in the middle. The on-line measurement device comprises a support, a measurement instrument, a fixed frame, a lever, a pin shaft, a tension spring, a slide block, a floating point gauge and a fixed point gauge, wherein the fixed frame is provided with a through hole; the lever penetrates through the through hole and is hinged to the through hole by virtue of the pin shaft; the tension spring is slantwise arranged between the lever and the fixed frame; the measurement instrument is fixedly connected to the fixed frame; a measuring rod of the measurement instrument is in contact with the lever; the support is provided with a lever through hole and a guide sliding chute; the fixed frame is fixedly arranged on the support; the through hole in the fixed frame corresponds to a through hole in the lever in position; the slide block is arranged in the guide sliding chute; the fixed point gauge is arranged on the slide block; the floating point gauge is arranged on the lever; the middle part of the support is provided with a middle hole. The on-line measurement device disclosed by the invention has the advantages of wide measurement range, high detection precision, convenience in operation and low cost; the on-line measurement device for the diameter of the shallow-spigot part with the shaft in the middle appears at home and abroad for the first time.

The invention belongs to the technical field of crude oil moisture content measurement, and particularly relates to a frequency moisture content measuring instrument in a rotational flow state and a method for measuring the moisture content by the same. The frequency moisture content measuring instrument comprises a sleeve, one end of the sleeve is horizontally connected with a cyclone, and the other end of the sleeve is vertically connected with a guide pipe; a radio frequency signal processing module and a communication wire protection cover are arranged outside the sleeve, and the communication wire protection cover supplies power to the radio frequency signal processing module and transmits signals through an internal wire; a radio frequency antenna connected with the radio frequency signal processing module is arranged in the sleeve; and the radio frequency signal processing module comprises an embedded single-chip microcomputer, a signal source generator, a signal amplifier, a data detection module and a data acquisition card. The moisture content is measured by utilizing the rotational flow state, the influence of unstable oil-water distribution is smaller, and a measurementresult is more accurate. By design of detachable parts, wax deposition and scaling on the surface of the antenna can be removed in time, parts are convenient to replace, and the service life can be prolonged.

The invention belongs to the field of high-power high-current pulsed electron beam and substance interaction research, relates to an MV-level voltage peak value measuring probe and a manufacturing method thereof, which can perform MV-level high-voltage measurement, and solve the problem that an existing pulsed voltage measuring method is not suitable for MV voltage measurement. The MV-level voltage peak value measuring probe comprises a detecting element, an aluminum film filter, a carrying platform and a fastening sleeve, wherein the detection element is a solid nuclear track detection element with wide detection threshold energy; a mounting boss is arranged at the top end of the carrying table, a mounting groove is formed in the top end of the mounting boss, and the detection element isarranged in the mounting groove; the aluminum film filter is of a plate-shaped structure, is arranged above the mounting boss and covers the detection element; and the fastening sleeve sleeves the mounting boss and tightly presses the aluminum film filter on the mounting boss. The MV-level voltage peak value measuring probe has a very wide voltage peak value measuring range, and can realize voltage peak value measurement of more than several MVs.

The invention provides online measurement equipment of viscosity of crude oil and a measurement method. The online measurement equipment comprises an oil absorption line, a metering device and a viscosity detection device; the oil absorption line and a main oil line pipeline are connected in parallel; the metering device communicates with the oil absorption line; and the viscosity detection communicates with the metering device. The online measurement equipment provided by the invention is high in measurement precision, and has low requirement on the fluid and surrounding measurement environment stability; the requirement on the measurement condition is low, and the measurement sensitivity is high; the environment vibration influence on the single-point measurement is comparatively small,and the measurement equipment can be used for quickly, accurately, conveniently and online measuring the viscosity of the crude oil.