40results about How to "Measure real" patented technology

The invention provides a GPS clock signal-based high voltage capacitive equipment insulation online monitoring system, including an on-site monitoring unit comprising a CPU, a wireless communication module which is 2.4GHz wireless communication module, a GPS clock receiving module, and a on-site monitoring current unit and a on-site monitoring voltage unit installed on the same bus line, and a station terminal control computer. An insulation online monitoring method includes that: the station terminal control computer sends synchronous remotely collection order to each on-site monitoring unitvia 2.4GHz wireless network; each on-site monitoring unit receives GPS clock signal and realizes synchronous remotely collection of each on-site monitoring unit on the booking time, comparing the uploaded information, calculates equivalent capacitor, end screen current and dielectric loss factor of high voltage capacitive equipment after the each on-site monitoring unit obtains end screen currentsignal with clock signal or sequence number and PT secondary side voltage signal.

The invention relates to a lightning electromagnetic pulse shielding effectiveness measurement device and method, including a DC high-voltage generator, a charging switch, a current-limiting resistor, a non-inductive pulse capacitor, a tungsten-embedded switch, an AC-DC voltage divider, an adjustable inductance, a large transmission line, Adjustable water resistance, pulse electric field optical fiber measurement system, pulse magnetic field optical fiber measurement system, shielding cabinet and oscilloscope, characterized in that: after the DC high voltage generator charges the non-inductive pulse capacitor to a given voltage through the charging switch and the current limiting resistor, the The tungsten switch discharges the energy stored in the capacitor through the adjustable inductance to the large transmission line and the adjustable water resistance to generate lightning electromagnetic pulses. The shielding body to be tested is placed in the transmission line, and the pulse electromagnetic field inside and outside the shielding body is measured at the same time to calculate its shielding effectiveness. The shielding effectiveness of the shielding body against various lightning electromagnetic pulse electric fields and magnetic fields can be measured more realistically and simultaneously.

The invention relates to a method and an apparatus for measuring the glass micro-bead refractive index. According to the present invention, when the refractive index of a high-refractive index glass micro-bead is measured, a reflecting mirror adjustment device and a camera five-dimensional adjustment device are adjusted so as to make the camera center, the light absorption center, and the hole center of the reflecting mirror having the hole coaxial, a single-mode He-Ne laser emits laser, the laser finally irradiates onto the glass micro-bead through a series of reflections and transmissions, a secondary rainbow image is obtained on a receiving screen, the camera collects the image, the receiving distance from the glass micro-bead to the receiving screen is measured, the radius of the outermost ring of the rainbow stripes is measured, the minimum deviation angle of the secondary rainbow of the glass micro-bead to be measured is calculated, and the refractive index is calculated through inversion of the minimum deviation angle; and when the refractive index of a low-refractive index glass micro-bead is measured, a spring locking device is opened, the instruments are adjusted so as to make the system in which the camera, the receiving screen and other devices exist rotate 90 DEG, the fixation is performed through a support frame, other steps are the same as the steps for measuring the refractive index of the high-refractive index glass micro-bead, and the minimum deviation angle of the primary rainbow of the glass micro-bead to be measured is calculated so as to calculate the refractive index through the inversion.

The invention discloses a dynamic model method for measuring a tunnel air resistance coefficient of a high speed train and application of the dynamic model method. The dynamic model method comprises the steps of preparing site equipment, collecting data, drawing a speed curve, drawing an acceleration curve and computing the tunnel air resistant coefficient. The main steps are as follows: placing a motor train unit model on a dynamic model experiment platform and enabling the motor train unit model to be connected with an accelerating mechanism; setting a light reflection zone; installing a photoelectric detector; installing a data collecting device; connecting a computer when the motor train unit model is in a stop state; when the motor train unit model runs to a set distance in front of a tunnel entrance at a set primary speed, enabling the motor train unit model to begin to slide freely and pass through the tunnel until the motor train unit model stops; emitting visible light to the light reflection zone and receiving and storing reflection light signals by the photoelectric detector; and drawing the speed curve and the acceleration curve and computing the tunnel air resistance coefficient by placing the quality of the motor train unit model, the speed of the motor train unit model and the acceleration of the motor train unit model into the newton second law formula and the Davis empirical formula.

The invention relates to a parallel core holder. The parallel core holder comprises a parallel barrel, an inner gear ring, a base and a rubber cylinder. The parallel core holder is characterized in that the parallel barrel is connected with a front end cover and a rear end cover by virtue of screws, a front sealing piece and a rear sealing piece are respectively arranged in a front sealing slot and a rear sealing slot of the parallel barrel, plugs are connected with the front end cover and the rear end cover by virtue of screws respectively, the rubber cylinder is arranged inside the parallelbarrel, the small end of a square valve element is connected with a fine tuning nut by virtue of a screw thread, the big end of the square valve element is in fit with a square valve pocket, the square valve pocket is arranged in a square through hole in the middle part of the parallel barrel, the parallel barrel is connected with the big end of a connecting rod and a connection block by virtue ofscrews, the connection block is welded at the periphery of the inner gear ring, the inner gear ring is in fit with a planetary gear and a sun gear to form a planetary gear mechanism, the sun gear, aY-shaped baffle and the small end of t connecting rod are respectively in fit with the long end of a rotary rod, a flat key is placed in a key slot of the long end of the rotary rod, and the rotary rod is in fit with a long support and a short support on the base. The parallel core holder provided by the invention has the advantages that an interlayer and a heterosphere stratum can be efficientlyand quickly simulated and related parameters are measured.

The invention discloses a laser light source speckle measurement method, a speckle suppression device and a parameter optimization method thereof. The laser light source speckle measurement method comprises the following steps: laser light emitted by a laser generator is irradiated onto a fluorescence imaging camera; the fluorescence imaging camera Receive laser light within the preset exposure time and generate corresponding image information; collect image information and form a Gaussian distribution image containing speckle, where the speckle appears as high-frequency noise; calculate the speckle after processing the Gaussian distribution image contrast. Since the fluorescence imaging camera in the laser light source speckle measurement method is directly used as the receiving screen of the laser speckle, the influence of the projection screen, the observation angle and position of the camera relative to the screen and other factors are eliminated on the basis of ensuring the consistency of the test, so this measurement method It can truly and reliably measure the speckle contrast of the laser light source, and has high measurement accuracy.