34results about How to "Accurate and convenient calibration" patented technology

Before replacement of constituent parts of an image density sensor or of other image forming units, the image density of a formed test toner patch image is detected by the image density sensor and conditions for image formation are controlled. After replacement of the constituent parts, the image density sensor detects the image density of a test toner patch image which is formed based on the controlled conditions for image formation. The optical output and / or the optical sensitivity is adjusted so that a detected value becomes a predetermined reference value, to calibrate the image density sensor. With this image formation controlling method, the image density sensor can be calibrated easily and precisely, the image density of a toner pattern image can be held proper and a stable high-quality image can be obtained.

The invention relates to the technical field of car maintenance and equipment calibration, and discloses a calibration device for a lane keeping system. The calibration device comprises a bracket device, lasers and a pattern plate. The bracket device comprises a horizontal scale ruler, the lasers are used for being mounted on a car body and emitting laser beams to the horizontal scale ruler. The pattern plate is mounted on the bracket device and is used for attaching of a calibration pattern. By using the calibration device, the two lasers can be mounted on wheels on both sides of the car, thetwo equidistantly-emitted laser beams by taking the wheels as reference points are shined on the horizontal scale ruler, the bracket device can be moved to the appropriate position according to the scale of the horizontal scale ruler, and calibration of the center line of the car can be realized. When the center line of the car is calibrated, the corresponding calibration pattern can be selectedor replaced according to different car models and attached to the pattern plate, and calibration operation of the lane keeping system of the different car models can be conveniently realized.

A vehicle wheel, comprising a rim, a disc, a tire defining with the rim a circumferential cavity C, and at least one resonator suitable for attenuating a natural resonant frequency of said cavity, said wheel also comprising a safety support, for supporting the tread of this tire from the inside in the event of loss of inflation pressure, said support providing at least one of the walls of said resonator. The invention also provides for the safety support comprising resonators.

In an electronic component mounting apparatus capable of replacing a component placing device with any of plural other component placing devices different in performance, the distance between the center line of a component pick-up portion of a replaced component placing device and the optical axis of a board recognizing camera is calibrated easily and precisely. A movable table is positioned so that a reference mark provided on a base frame to reside in the visual field of a component recognizing camera comes in the visual field of a board recognizing camera and that at the same time, the end of the component pick-up portion of the replaced component placing device comes in the visual filed of the component recognizing camera. The board recognizing camera is used to detect the positional relation of the optical axis thereof relative to the reference mark, while the component recognizing camera is used to detect the positional relations of the optical axis thereof relative to the reference mark and relative to the center line of the component pick-up portion. These detected positional relations are used to calculate the positional relation between the optical axis of the board recognizing camera and the center line of the component pick-up portion.

The invention provides a sampling method based on software frequency tracking. Non-full-period sampling is adopted, the deviation of the non-full-period sampling is decreased to be lower than a specified value, standard full-period sampling is achieved, and measurement accuracy of the non-full-period sampling is improved. The invention provides a broadband voltage / current calibration device and a broadband power / phase calibration device adopting the sampling method based on software frequency tracking. The broadband voltage / current calibration device comprises a broadband voltage / current source, a broadband resistance voltage / current divider, a sampling digital voltmeter, a signal generator and a computer, wherein the broadband voltage / current source is connected with the sampling digital voltmeter through the broadband resistance voltage / current divider, the output end of the signal generator is connected with an outer trigger port of the sampling digital voltmeter, and the computer is respectively connected with the signal generator, the sampling digital voltmeter and the broadband voltage / current source.

An orientation measurement value acquisition unit (145) acquires an orientation measurement value measured by an orientation sensor (110) mounted on an image capturing apparatus (120), and an orientation measurement value measured by a sensor (115) mounted on a physical object (125). An image processing unit (135) acquires the image coordinates, on a captured image, of indices allocated on the physical object (125). A calibration unit (160) calculates at least one of allocation information of the sensor (110) with respect to the image capturing apparatus (120) and allocation information of the sensor (115) with respect to the physical object (125) using the two orientation measurement values and image coordinates.

An orientation measurement value acquisition unit (145) acquires an orientation measurement value measured by an orientation sensor (110) mounted on an image capturing apparatus (120), and an orientation measurement value measured by a sensor (115) mounted on a physical object (125). An image processing unit (135) acquires the image coordinates, on a captured image, of indices allocated on the physical object (125). A calibration unit (160) calculates at least one of allocation information of the sensor (110) with respect to the image capturing apparatus (120) and allocation information of the sensor (115) with respect to the physical object (125) using the two orientation measurement values and image coordinates.

An absolute distance measuring method and device including a transmission unit having a laser array comprising multiple measurement laser emitters arranged along a laser array axis and a receiver unit having at least one receiver array comprising multiple measurement receivers arranged along a receiver array axis for measuring of an absolute distance based on a respective detected transmission beam and the principle of time-of-flight. The laser array comprises at least a first reference laser emitter and the receiver array comprises at least a first reference receiver. The reference laser emitter and reference receiver define an internal absolute distance reference beam path for calibration of the device with respect to said measuring of absolute distance.

Because of using a plurality of light sources and photodetectors, fluctuation of output characteristic among individual light sources and fluctuation of output characteristic among individual photodetectors impede a measurement in a satisfactory precision. The organism information measuring apparatus comprises an LED (105); a detecting region changer (108) for changing a position of a region of light emitted from the LED (105) that has passed through the organism and has again been emitted toward outside through the organism surface; a photodiode (104) for detecting the light that has passed through the detecting region changer (108); a computing unit (104) for acquiring light information related to the light detected by the photodiode (104) , and generating information related to the organism referring to the light information and sample information; and a data storing unit (101) for storing the sample information.

The invention relates to a free multi-view point multi-projection three-dimensional display system and method. The free multi-viewpoint multi-projection 3D display system consists of 1-5 pairs of color CCD cameras for shooting, one color CCD camera for calibration, 2-8 projectors, a large-screen display terminal, a calibration board and a It consists of a computer equipped with a multi-channel synchronous image acquisition card and a multi-output graphics card. The computer is connected to the camera through the image acquisition card and connected to the projector through the display card. The three-dimensional multi-projection display method includes steps such as image source video encoding, projector calibration, stereoscopic image splicing and the like. The three-dimensional multi-projection display system of the present invention is based on computer vision technology, and can realize large-screen, realistic three-dimensional multi-projection display.

The invention discloses a device for automatically calibrating parameters of regulators and relates to a device for simultaneously carrying out automatic calibration on a plurality of regulators. The device provided by the invention comprises a calibration operating platform and an assistant operating platform. The device is characterized by also comprising a plurality of calibration modules which are arranged on the calibration operating platform and the assistant operating platform, each calibration module comprises a plurality of electrical devices or instrumentation devices, and the electrical devices or instrumentation devices are mutually connected in a patch-cord mode and a terminal strip connection mode. By using the device disclosed by the invention, the problems that in the prior art, multi-channel stable calibration signals can not be provided and the measurement error are caused by manual operation and numerical reading in the process of carrying out regulator calibration are solved. The calibration device disclosed by the invention integrates all devices on the calibration operating platform, and has no need of moving the instrumentation devices while carrying out different project calibrations; meanwhile, the device is simple in operation, convenient and flexible.

The invention relates to a device and method for checking a portable electronic current transformer. The device includes a standard current transformer, a heavy current cable, a secondary converter, a merging unit, a voltage regulator, a precision resistor, and a data processing circuit. Voltage output by the voltage regulator is connected to a secondary side input terminal of the standard current transformer via series connection of the precision resistor; voltage at the two ends of the precision resistor are led into the data processing circuit via the cable; the primary side output terminal of the standard current transformer is connected to the heavy current cable; the heavy current cable is further in series connection with a to-be-measured electronic current transformer and is connected with the primary side input terminal of the to-be-measured electronic current transformer; the secondary side output terminal of the to-be-measured electronic current transformer is connected to the secondary converter and the merging unit in sequence; the merging unit outputs a to-be-measured current signal to the data processing circuit; and the data processing circuit outputs a checking result. The device has advantages, such as high checking precision, small size, light weight, portability, and low cost.

The invention relates to the field of fluorescence detection, and discloses a fluorescence detection optical system. The fluorescence detection optical system comprises an objective table, a light path module and an adjusting mechanism, the objective table is used for placing a sample to be detected, and the objective table is provided with a detection channel; the light path module is used for exciting and detecting a fluorescence signal of a to-be-detected sample, a detection light path is arranged in the light path module, and the detection light path is communicated with the detection channel; the adjusting mechanism comprises a first adjusting assembly and a second adjusting assembly, the first adjusting assembly is used for adjusting the to-be-detected sample to be aligned with the detection channel, and the second adjusting assembly is used for adjusting the to-be-detected sample to coincide with the focus point of the detection light path. The fluorescence detection optical system provided by the invention is simple, convenient and accurate in sample position calibration, simple in optical path structure, reasonable and compact in optical path layout, and easy to realize miniaturization and modularization.

An abscissa calibration jig of a laser interference measuring apparatus, includes: an image projection unit configured to project an image with a marker; a first support mechanism configured to rotatably support the image projection unit around a first rotation axis passing a predetermined rotation center; and a second support mechanism configured to rotatably support the first support mechanism around a second rotation axis crossing the first rotation axis at the rotation center.

A method of displaying a color gamut includes: determining a color gamut for all gradations with respect to a display apparatus; and displaying the determined color gamut for all the gradations in a three-dimensional (3D) form on the display apparatus.

The invention relates to the technical field of automobile maintenance and equipment calibration and discloses an automobile body center line calibration apparatus and method. The calibration apparatus comprises a support device and lasers. The support device comprises a horizontal graduated scale; the lasers are used for being installed on an automobile body and emitting laser beams to the horizontal graduated scale. When the automobile center line calibration apparatus is used, the two lasers can be installed on wheels on the two sides of an automobile; two laser beams emitted at equal intervals with the wheels as reference points irradiate the horizontal graduated scale; the support device can be moved to a proper position according to the scale mark of the horizontal graduated scale; and therefore, the calibration of the center line of the automobile can be facilitated.

A device for determining the quality of a moving corrugated board web with at least one cover web and at least one corrugated web. A quality determination sensor arrangement, which includes a first quality determination sensor unit facing the corrugated board web, is provided for determining the quality of the corrugated board web on its first side, and a second quality determination sensor unit, facing a second side of the corrugated board web opposite the first side, for determining the quality of the corrugated board web on its second side. The device includes an evaluation unit that is in signal contact with the quality determination sensor arrangement and evaluates signals from the quality determination sensor arrangement related to the quality of the corrugated board web.

The invention discloses a multi-channel TIADC system DC bias and gain error calibration method and device, and the method comprises the steps: obtaining at least two periodic sampling values of each channel under a first DC signal source, and calculating the average value of the first sampling values; acquiring at least two periodic sampling values of each channel under a second direct-current signal source, and calculating an average value of the second sampling values; and according to the first sampling value average value and the second sampling value average value, performing DC bias andgain error calibration on the sampling data of the lower channel of the working signal. According to the improved TIADC analog self-calibration system provided by the invention, two paths of direct-current calibration signals and the calibration model are utilized to calibrate input signals during normal work, so that the calibration system is simplified, and meanwhile, the calibration result is more accurate.

A three-dimensional information acquisition system using pitching practice, and a method for calculating camera parameters are disclosed. The method by which a server calculates camera parameters in order to obtain three-dimensional information, according to various embodiments of the present invention, can comprise the steps of: receiving, from at least two camera devices, image information of dynamic objects moving at a predetermined speed; confirming location information of each dynamic object, included in the image information, on the basis of the same time in each piece of image information received from each camera device; and calculating camera parameters, which indicate the relationship between the camera devices, by using at least a part of each piece of confirmed location information as a corresponding point.

The invention discloses a calibration device and a calibration method for a photoelectric detector. The calibration device comprises a beam splitter prism, an absolute detector and a processing unit; the beam splitter prism is arranged above the photoelectric detector; the photoelectric detector is arranged on a work-piece table; a lighting light is divided by the beam splitter prism into a first measuring light and a second measuring light; the absolute detector is arranged at one side of the beam splitter prism; the second measuring light comes into the absolute detector; the first measuring light comes into the photoelectric detector; the processing unit is used for calculating the light intensity of the second measuring light measured by the absolute detector and the light intensity of the first measuring light measured by the photoelectric detector, building a relation between the photoelectric detector and the absolute detector, and calibrating gain and offset of the photoelectric detector. The calibration device and the calibration method are simple to operate; environmental pollution of a human factor on inside of a photoetching machine is reduced; the test accuracy is improved; and the light measured by the absolute detector and the light measured by the calibration detector are the same light, so that the situation of transmittance change caused by volatility of a light source is avoided, thereby improving the measurement accuracy.

The present invention relates to the technical field of automobile maintenance and discloses a calibration device for a lane keeping assist (LKA) system. The calibration device includes a support apparatus, a laser and a pattern board. The support apparatus includes a horizontal graduated scale. The laser is configured to be mounted on the body of an automobile and to emit a laser beam to the horizontal graduated scale. The pattern board is mounted on the support apparatus and is configured to attach an alignment pattern. By means of the calibration device, two lasers are mounted on wheels on two sides of the automobile. Two laser beams that are emitted from equal distances with the wheels being reference points are irradiated to the horizontal graduated scale. Based on marks on the horizontal graduated scale, the support apparatus may be moved to an appropriate position to calibrate the centerline of the automobile.

The invention provides a testing device for measuring flow-induced noise and vortex-induced noise of a marine pipeline, which comprises a pipe sleeve, a connecting mechanism, a damping mechanism, a diversion grid and a self-contained hydrophone, the pipe sleeve is mounted on the outer surface of the marine pipeline, one end of the connecting mechanism is placed in the pipe sleeve, the other end of the connecting mechanism is connected with the damping mechanism, and the damping mechanism is connected with the diversion grid, the self-contained hydrophone is placed in the diversion grid; according to the test device for measuring the flow-induced noise and the vortex-induced noise of the marine pipeline, the acoustic near-field effect caused by insufficient distance between the hydrophone and the submarine pipeline in a conventional test method is avoided, and the influence of large vortex pulsating pressure on the hydrophone is eliminated by utilizing the flow guide grid, the low-frequency interference caused by external ocean current in the testing process is reduced, the vibration reduction mechanism design is adopted, the normalization of the flow-induced noise and the vortex-induced noise of the ocean pipeline is more accurate, the measurement result is more reliable, and technical support is provided for the test measurement of the flow-induced noise and the vortex-induced noise of the ocean pipeline.

The embodiment of the invention discloses a hydrogen peroxide concentration sensor calibrator, which comprises a calibrator body. The calibrator body comprises a solution box and a controller, wherein the solution box comprises a solution containing groove and a plurality of sensor sockets, the solution containing groove is used for containing a to-be-detected hydrogen peroxide solution, the plurality of sensor sockets are used for placing a plurality of sensors including a to-be-calibrated hydrogen peroxide concentration sensor, and the solution box is in a sealed state after all the sensors are inserted into the plurality of sensor sockets; the controller comprises an operation unit and a calibration unit; the operation unit is used for performing operation on various received sensor detection data according to a preset operation program to obtain operation result data; and the calibration unit is used for calibrating the to-be-calibrated hydrogen peroxide concentration sensor according to a preset calibration program and the operation result data. Effective calibration of the hydrogen peroxide concentration sensor is realized.

The invention provides a sampling method based on software frequency tracking. Non-full-period sampling is adopted, the deviation of the non-full-period sampling is decreased to be lower than a specified value, standard full-period sampling is achieved, and measurement accuracy of the non-full-period sampling is improved. The invention provides a broadband voltage / current calibration device and a broadband power / phase calibration device adopting the sampling method based on software frequency tracking. The broadband voltage / current calibration device comprises a broadband voltage / current source, a broadband resistance voltage / current divider, a sampling digital voltmeter, a signal generator and a computer, wherein the broadband voltage / current source is connected with the sampling digital voltmeter through the broadband resistance voltage / current divider, the output end of the signal generator is connected with an outer trigger port of the sampling digital voltmeter, and the computer is respectively connected with the signal generator, the sampling digital voltmeter and the broadband voltage / current source.

The calibration method of the thermal resistance heat flow sensor includes the following steps: a) setting a heat conduction plate; b) symmetrically installing several heat flow sensors and temperature sensors on both sides of the heat conduction plate; c) the heat flow values ​​collected by each heat flow sensor , cold surface temperature and hot surface temperature Send to the heat flow-temperature inspection instrument respectively; d) The heat flow-temperature inspection instrument is based on the formula Calculate the standard heat flow value ; e) According to the formula Calculate the correction coefficient C of the heat flow value; f) When the error between the correction coefficients C of the heat flow value for consecutive N times does not exceed 1%, calculate the average value of the N correction coefficients C , and write it into the configuration file of the Heat Flow-Temperature Inspector as the final heat flow value correction factor. The calibration result is accurate, high in precision, convenient and feasible, effectively solves the problem that the heat flow instrument cannot be accurately calibrated in the thermal inspection of buildings, and improves the experimental efficiency and reliability.

The invention discloses a device for automatically calibrating parameters of regulators and relates to a device for simultaneously carrying out automatic calibration on a plurality of regulators. The device provided by the invention comprises a calibration operating platform and an assistant operating platform. The device is characterized by also comprising a plurality of calibration modules which are arranged on the calibration operating platform and the assistant operating platform, each calibration module comprises a plurality of electrical devices or instrumentation devices, and the electrical devices or instrumentation devices are mutually connected in a patch-cord mode and a terminal strip connection mode. By using the device disclosed by the invention, the problems that in the prior art, multi-channel stable calibration signals can not be provided and the measurement error are caused by manual operation and numerical reading in the process of carrying out regulator calibration are solved. The calibration device disclosed by the invention integrates all devices on the calibration operating platform, and has no need of moving the instrumentation devices while carrying out different project calibrations; meanwhile, the device is simple in operation, convenient and flexible.

The invention discloses an ultra-narrow band optical filter temperature control configuration capable of accurately controlling temperature in a wide temperature range and an adjustment method thereof, and belongs to the field of airborne optical instruments. The ultra-narrow band optical filter is fixed in a cavity formed by the first sealing light window component, the main frame and the second sealing light window component through a pressing ring, an optical filter heat insulation pad is arranged between the ultra-narrow band optical filter and the step face of a through hole of the main frame, an optical filter positioning ring is arranged between the ultra-narrow band optical filter and the pressing ring, and it is guaranteed that the ultra-narrow band optical filter does not make contact with the main frame. The two thermoelectric refrigerators are respectively fixed on two opposite side walls of the main frame through the first heat sink component and the second heat sink component; and the two heating sheets are respectively fixed on the other two opposite side walls of the main frame through the two heating sheet fixing plates. The temperature of the ultra-narrow band optical filter is controlled through the main frame and the gas in the sealed optical window, the temperature of the ultra-narrow band optical filter is accurately controlled within the wide temperature range of-55 DEG C to 70 DEG C, and accurate and reliable temperature control of the ultra-narrow band optical filter within the airborne environment wide temperature range is achieved.

The invention discloses a calibration block assembly for a displacement monitoring system. The displacement monitoring system comprises a base, a linear sensor, a linear sensor pressure head, a connecting rod, a connecting rod installation block and a driving cylinder. The linear sensor is mounted on the base. One end of the connecting rod is connected with the linear sensor pressure head, and theother end of the connecting rod is connected with the connecting rod installation block. The driving cylinder is connected with the connecting rod installation block. The calibration block assembly includes a first calibration block suitable for calibrating the installation position of the linear sensor of the displacement monitoring system, a second calibration block suitable for calibrating theinstallation position of the linear sensor pressure head of the displacement monitoring system, and a third calibration block suitable for calibrating the installation position of the connecting rodinstallation block of the displacement monitoring system. The calibration block assembly can calibrate the installation positions of the linear sensor, the linear sensor pressure head and the connecting rod installation block conveniently and accurately before the displacement monitoring system is reused.

The invention provides an infrared flexible standard target for evaluating the field infrared camouflage effect of camouflage equipment, which can be used in different field meteorological environments and different background conditions, realizes the detection and evaluation of the real hiding effect and the false showing effect of the camouflage equipment so as to guide the development of the camouflage equipment, and is convenient to use and low in cost. The infrared flexible standard target is arranged on the periphery of an infrared target to be evaluated, and the infrared flexible standard target adopts a four-layer structure design and sequentially comprises a high-emissivity layer, a heat conduction layer, a uniform-temperature layer and a heating layer from outside to inside; wherein the emissivity of the high-emissivity layer is greater than or equal to 0.95; the heating layer is of a soft film structure and used for being connected with a power source so as to generate heat through circulating current.