35results about How to "Increase calibration range" patented technology

An imaging system and methods for resolving elements of interest through and obscuring environment by removing undesired signals from the intervening, obscuring environment is disclosed. A passive hyperspectral imaging sensor is calibrated and integrated into a system having a positioning and attitude detection system and an instrument control and data acquisition system that records data from sensors in a three-dimensional data cube having two spatial dimensions and a spectral dimension. Either an active detection and ranging system or a look-up-table approach or both are used to remove the noise generated by the intervening, obscuring environment from the data relevant to the elements of interest.

Various methods for controlling one or more parameters of a flow cytometer type measurement system are provided. One embodiment includes monitoring parameter(s) of the measurement system during measurements of sample microspheres. The method also includes altering the parameter(s) in real time based on the monitoring. Another method includes monitoring a temperature proximate to the measurement system. One such method includes altering a bias voltage of an avalanche photo diode in response to the temperature using empirically derived data. A different such method includes altering output signals of a photomultiplier tube in response to the temperature using a characteristic curve. Some methods include monitoring a temperature of a fluid, in which sample microspheres are disposed, that will flow through the flow cytometer type measurement system. This method also includes determining a velocity of the sample microspheres in the measurement system from a viscosity of the fluid at the temperature.

The invention discloses a method and a device for eliminating the crossed polarization jamming in a wireless communication system. According to the invention, by automatically detecting an error value between a signal subjected to elimination of the crossed polarization and an ideal signal, a phase deviation value of both receiving and transmitting ends of a master polarization direction signal and a relative phase deviation value of the master polarization direction signal and a slave polarization direction signal are adaptively estimated and a coefficient of a filter is updated; the slave polarization direction signal is regulated by utilizing the relative phase deviation value of the master polarization direction signal and the slave polarization direction signal and the coefficient of the filter and the master polarization direction signal is regulated by utilizing the phase deviation value of both the receiving and transmitting ends of the master polarization direction signal and the coefficient of the filter; then aiming at the regulated master polarization direction signal and the regulated slave polarization direction signal, the signal subjected to elimination of the crossed polarization is updated; and the elimination of the crossed polarization is completed until the error value meets the error requirement set by technical indexes.

Embodiments of the application disclose a high-power pulse field strength calibration system and a high-power pulse field strength calibration method. The system comprises: a horn antenna and an integrated optical electric field sensor disposed opposite in a microwave dark chamber, and an analysis module, wherein the horn antenna emits a pulse field with a fixed duty cycle in the microwave dark chamber, the integrated optical electric field sensor induces a pulse field strength to generate an induced voltage, and the analysis module obtains calibration data of the pulse field strength based onparameters of the pulse signal source and the induced voltage. The technical solution described in the application can accurately perform the calibration of high-power pulse field strength, and can meet the measurement guarantee requirements of high-power pulse field strength. The calibration range is up to 3000V/m, which is a significant improvement over the calibration range of the existing conventional methods (up to 1000V/m). The scheme can also calibrate time domain parameters such as pulse field strength repetition frequency, pulse width, and rise/fall time as needed.

The invention provides an image correction method and system of an infrared focal plane detector. The method comprises the steps that an infrared focal plane receives infrared light and converts the infrared light to a digital signal so as to enable each picture element of the focal plane to correspond to one pixel of an image; image data are converted to original grey values to be stored; for each pixel, gain and offset correction compensation is conducted in a multi-section correction mode according to the corresponding grey values, and a compensation result is obtained. Real-time dynamic background estimation is conducted on the compensation result, and an estimation background is obtained; estimation background offset processing is conducted on the image; an image obtained after offset processing is output. Compared with the prior art, balancing is conducted on calculated performance, image quality and implementation complexity, infrared correction images are continuously output in a blindness-free mode, computation complexity is reduced, the parameter prestorage number is reduced, and power dissipation of the whole system is reduced on the premise that image quality is ensured.

The invention discloses a mini distributed fiber temperature measuring calibration device and method. The calibration device comprises a casing; an upper panel of the casing can be opened and closed, and is provided with through holes through which tested fibers can penetrate; the casing is internally provided with a detachable fiber winding column; the bottom of the casing is provided with heating resistance wires; the casing is internally provided with a heat-transfer fluid working medium and a temperature sensor; and the temperature sensor and the heating resistance wires are connected with a controller of the calibration device. A distributed temperature measuring device calibrate the fiber temperature coefficient in a miniaturized manner within the range from normal temperature to 200 DEG C, and the test device can be used to realize calibration and demonstration of a test site.

The invention provides a method for determining buckling load-end shrinkage curves of deck longitudinal beam columns supported by cantilever crossbeams, and belongs to the technical field of ship structural engineering. The method for determining buckling load-end shrinkage curves of deck longitudinal beam columns supported by cantilever crossbeams comprises the following steps of: 1, establishing a deck longitudinal beam column instability mechanical model after large-scale impact; 2, establishing a cantilever crossbeam mechanical equation and obtaining a lowest-order frequency formula; 3, establishing a cantilever crossbeam torsional rigidity calculation model and determining a torsional rigidity; 4, determining a support rigidity, for a deck longitudinal beam, of a crossbeam; 5, determining a longitudinal beam column buckling curve and a buckling critical load; and 6, determining a critical load-end shrinkage curve of the longitudinal beam column. The method provided by the invention is a theoretical method for rapidly obtaining the buckling load-end shrinkage curves of longitudinal beam columns supported by cantilever crossbeams after large-scale impact damage, so that the calculation is improved; and compared with a nonlinear finite element method, the method has the advantages of shortening the calculation time and improving the efficiency.

The invention relates to a method for correcting signal distortions in an amplifier device (20), which is characterized in that a digital PWM modulator (17) is operated with a frequency-variable clock (18). The invention also relates to a device for correcting signal distortions in an amplifier device (20).

The invention relates to the mechanical metering device field and especially relates to the calibration metering device of a thin-film array-type distributed pressure sensing system. The device comprises a standard weight, a thin film array distributed pressure sensor used for detecting the standard weight, a calibration groove, a limiting clamping plate which is arranged in the calibration grooveand is cooperated with the calibration groove, and a silicone pad arranged between the calibration groove and the limiting clamping plate. A gap is arranged between the calibration groove and the limiting clamping plate. A calibration boss is arranged in the gap. The thin film array distributed pressure sensor is arranged between the silicone pad and the limiting clamping plate. The standard weight and the calibration boss are cooperated. Compared with a traditional metering tool, by using the device of the invention, the weight of a calibration weight can be applied more than 30kg, a calibration range is increased, the measurement range of the pressure sensing system is widened and the usage range of the thin film array distributed pressure sensor is enlarged.

The invention provides a plane correcting device for a silicon steel column. The plane correcting device for the silicon steel column comprises a stepper motor, a pressing plate, a connecting plate, a ball nut pair, a screw rod, a fixing column, an electric cylinder, a connecting rod, a first fixing plate, a hollow cleading, a sliding plate and a second fixing plate, wherein the lower end of the stepper motor is provided with the screw rod, and the ball nut pair is installed on the screw rod; the ball nut pair is assembled on the connecting plate, and the connecting plate is assembled on the the upper end of the pressing plate, wherein through the above design, multi-surface correction can be conducted on silicon steel at the same time; the right end of the electric cylinder is provided with the connecting rod, and the right end of the connecting rod is provided with the first fixing plate; the right end of the fist fixing plate is provided with the hollow cleading, and the right end of the second fixing plate is provided with the sliding plate; the sliding plate is installed on the hollow cleading, wherein automatic pushing can be conducted through the above design. The plane correcting device for the silicon steel column has the advantages of being convenient to use and operate, capable of simultaneously performing multi-surface correction, capable of achieving automatic pushing of the silicon steel column and expanding the calibration range, good in stability and high in reliability.

The invention relates to the field of mounting shaft calibration and particularly relates to an auxiliary device for calibrating water pump mounting shafts. The auxiliary device comprises a support frame, a displacement assembly, a calibration assembly and a fixing assembly, wherein a through groove is formed in one side of the support frame; the displacement assembly is fixedly mounted on the support frame; the calibration assembly is connected with the output end of the displacement assembly and is used for polishing and calibrating mounting shaft bodies; the fixing assembly is mounted in the support frame and is located on one side of the calibration assembly; the fixing assembly comprises a rotating mechanism and a locking mechanism; the rotating mechanism is connected with the support frame and is used for driving the mounting shaft bodies to rotate; the locking mechanism is arranged in the rotating mechanism, is connected with the output end of the rotating mechanism and is used for locking and fixing the mounting shaft bodies. According to the auxiliary device for calibrating the water pump mounting shafts, the diameters of the water pump mounting shafts can be calibrated in all directions; through the design of the rotating mechanism and the displacement assembly, the calibration range is greatly widened; any positions of the mounting shafts can be polished and calibrated; and the production efficiency of the mounting shafts is improved.

The invention relates to the technical field of motor mounting parts, and discloses a mounting component for an electric vehicle driving motor, which comprises a connecting disc and a containing groove formed in the connecting disc, a supporting device used for supporting a driving motor is slidably connected into the containing groove, the supporting device comprises a supporting plate, the supporting plate is slidably connected into the containing groove, a square groove is formed in the supporting plate, an overturning plate is rotationally connected into the square groove through a second rotating shaft, a first through hole is formed in the overturning plate, an extrusion device used for limiting the supporting device is further fixedly installed in the containing groove, and an extrusion device is located below the supporting device. The supporting device and the extrusion device are arranged, the supporting device is limited through the extrusion device, the supporting device is changed so as to limit the position of an electric vehicle driving motor connecting base, the equipment can calibrate the position of the electric vehicle driving motor connecting base, and assembling is convenient.