38results about How to "Realize fully automatic calibration" patented technology

The invention provides a wireless signal tester calibration device and a method. A frequency meter is used for calibration of an output frequency of output signals of the wireless signal tester; a microwave power meter is used for calibration of output power of output signals of the wireless signal tester; a vector signal analyzer is used for EVM calibration of output signals of the wireless signal tester; a vector signal transmitter and the microwave power meter are used for calibration of power measurement of the wireless signal tester; the vector signal transmitter and the vector signal analyzer are used for calibration of EVM measurement of the wireless signal tester; and thus, reliability of performance test on the corresponding wireless transmitting and receiving equipment by using the wireless signal tester can be ensured. The invention also provides an automatic testing system and a method. The calibration device of the invention can be used for carrying out automatic calibration on the wireless signal tester, and the wireless signal tester after calibration is used for automatically testing to-be-tested wireless equipment.

The invention provides a method and a system for automatically calibrating an electrical instrument. The system comprises a PC, an automatic calibration device controlled by the PC and an instrument hanging table for fixing the instrument to be calibrated. The PC sets a calibration proposal, controls the calibration device to calibrate calibrated instruments synchronously, and controls the calibration device to automatically retest the amplitude, phase, power, frequency and electrical error of the calibrated instrument, automatically store test data and generate test report after the calibration is finished. The method and the system solve the problem of the prior art of low instrument calibration precision and complex calibration process, realize automatic calibration and retest of the high-precision electrical instrument, ensure calibration precision and improve production efficiency.

The invention relates to a method for calibrating a camera by any two coplanar circles, and two non-concyclic centre coplanar circles are used as the calibration objects. A clear image is taken by the camera for the calibration objects, to define the equations of two elliptical shadows in the images and solve the coordinates of the image points of the focoids. The image point coordinates of the focoids and the shadow equations of absolute secondary curves are utilized to define the focal distance of the camera; a world coordinate system is set up, with the center of any of the two circles as the origin, and Z axis is parallel with the normal direction of the plane of the two circles. A rotation matrix is defined according to the relation between blanking points, blanking lines and the elliptical shadows; the solved position, of the world coordinate system, under the camera coordinate system is the right translation vector. The method of the invention can easily and conveniently define all variable parameters every time when the camera is calibrated, can realize the wholly automatic calibration, reduce calculation errors arisen by human intervention, and is particularly suitable for non-contact industrial inspection and the vision-based independent navigation system.

The invention relates to a method for calibrating a camera by adopting two same circles, which comprises the following steps: utilizing two non-tangent same circles as a calibration object, using the camera to shoot the calibration object from three angles to obtain three clear pictures, determining the equation of two elliptical images in each picture and obtaining coordinates of a pair of circle point images in each picture; determining internal parameters of the camera by utilizing the coordinates of the circle point images in the three pictures and the projection equation of an absolute secondary curve; obtaining internal common tangents and external common tangents of the two elliptical images in each picture; recovering and correcting an included angle between the internal common tangents of the two same circles in a world coordinate system; and finally obtaining external parameters of the camera according to established world coordinates of the internal common tangents and the external common tangents of the two same circles and image coordinates of the projection thereof. The invention can simply and accurately obtain the internal parameters and the external parameters of the camera and realize automatic calibration and also can be widely applied to non-contract type industrial detection and vision-based self-contained navigation systems.

The invention provides a portable infrared gas analyzer with automatic range calibration, comprising a pretreatment unit, an analysis unit, a master monitoring unit, a standardization unit and a correction unit. The analysis unit comprises a light source, an absorbing gas chamber and a receiving gas chamber, the light source generates infrared light and the infrared light irradiates the interior of the absorbing gas chamber, the standardization unit performs zero correction and range standardization and transmits standardized gas into the receiving gas chamber, and the correction unit automatically corrects a sample gas concentration measurement adapter pipe by calculating offset increment caused by actual environment variation. The portable infrared gas analyzer can automatically correct measurement results, not only overcomes the influence of measurement environments on measurement and ensures system measurement precision, but also can analyze gas for long time without an extra pretreatment unit, has a cost-saving effect and is convenient to carry.

The invention provides a calibration method for an XYY precision positioning platform. The method is used for completely solving the problems of executor calibration, decoupling and telescopic sensor calibration in single flow. The method is realized by arranging a separated position sensor at the external of the XYY precision positioning platform and orderly accomplishing the executor calibration, the telescopic sensor calibration and decoupling matrix calibration. The method sufficiently uses the position sensor which is independent of the platform. The position sensor is not only used for decoupling, but also used for the executor calibration and the telescopic sensor calibration. Besides, with the superposition property of matrix operation, the decoupling process can be simplified. The calibration method is high in precision, fast in speed, and capable of realizing fully automatic calibration. For lithography tools, the calibration method can be realized by using the prior devices in the lithography tools without arranging extra special devices.

The invention discloses a light power measuring method with a log ratio amplifying circuit combined with software. Measuring process is: constructing light power calculating formula P=K<3>beta+C<3> according to the log ratio amplifying circuit in the measuring system; configuring an AD converter according to wavelength of measured light source; connecting the measured light source with the light end, picking a signal received at the light end, the AD converter reading in data N times circularly after photoelectric conversion and log amplification, solving an average value beta of N conversion values; judging whether value of beta exceeds measuring range, if so, measurement is over; if not, dividing the light source measured according to power of the standard light source; comparing beta value with an edge value of the standard light source, selecting corresponding K<3> and C<3> according to location where beta is; introducing determined beta, K<3> and C<3> values to the light power calculating formula to obtain a power value P of the measured signal. The invention, compared with current power measuring method, is simple in process, large in dynamic range, and high in precision for light power measurement of optical fiber communication.

The invention discloses an automatic calibration method for a superconducting quantum chip parameter. In the method, the method comprises the following steps: acquiring a first range of a first calibration measurement signal of a to-be-calibrated parameter of a superconducting quantum chip and controlling a measurement device to send a plurality of first calibration measurement signals to the superconducting quantum chip in a first range; acquiring a first response parameter of the superconducting quantum chip under each calibration measurement signal; and finally, taking the first calibrationmeasurement signals corresponding to the optimal first response parameters as first actual calibration parameters of the to-be-calibrated parameter. According to the method, the problems of low calibration efficiency and the like caused by manual calibration are effectively solved, full-automatic calibration of the parameters of the chip is realized, and the method has the advantages of short calibration time, less repetitive work, labor cost saving and high calibration efficiency. The invention also discloses an automatic calibration device for a superconducting quantum chip parameter, an automatic calibration system for a superconducting quantum chip parameter and a readable storage medium. The automatic calibration device and the automatic calibration system have the same beneficial effects as the automatic calibration method.

The embodiment of the invention discloses a visual calibration method and system. The method comprises the steps that multiple cameras obtain target images respectively, first coordinates and second coordinates, namely coordinates of calibration points in an image coordinate system and coordinates of the index fixed points in a local target coordinate system, of the calibration points in each target image are determined, third coordinates are obtained, and the third coordinates refer to coordinates of two-dimensional codes in the target images in the image coordinate system; two-dimensional code information in the target image is extracted, the two-dimensional code information comprises fourth coordinates, the fourth coordinates refer to coordinates of the current two-dimensional code in aglobal target coordinate system, the second coordinates are corrected into fifth coordinates, and the fifth coordinates indicate coordinates of a fixed point in the global target coordinate system; and establishing a mapping relationship between the global target coordinate system and each image coordinate system according to the first coordinate and the fifth coordinate. A target with a two-dimensional code is utilized, local target coordinates of a calibration point are automatically corrected into global target coordinates through two-dimensional code information, and full-automatic calibration of the multi-camera vision system is achieved.

The present invention discloses an optical fiber strain coefficient automatic calibration method. The method includes the following steps that: the length of an optical fiber strain region is inputted, a measured optical fiber is tensioned and is fixed between a first fixture and a second fixture according to a set distance; an optical fiber length and an optical fiber refractive index are inputted; a main control computer starts automatic calibration; a Brillouin optical time domain reflectometer is adopted to test optical fiber strain distribution so as to find out an optical fiber length corresponding to the optical fiber strain region; the Brillouin optical time domain reflectometer is adopted to test optical fiber strain distribution so as to find out an acting area length of the measured optical fiber; a calibration stepping distance is determined according to the acting area length of the measured optical fiber; the Brillouin optical time domain reflectometer is adopted to test optical fiber strain distribution so as to read Brillouin frequency shift data corresponding to the optical fiber length corresponding to the optical fiber strain region, and movement is carried out, and N times of testing is carried out, wherein N is a natural number greater than or equal to 1, the data array of the corresponding optical fiber length and a Brillouin frequency shift data array corresponding to the optical fiber length are obtained; and the data are linearly fitted, so that the strain coefficient FCS of the measured optical fiber can be obtained.

The invention relates to a system and device for verifying an electronic current transformer. The system is provided with a standard current transformer, a control processing part, a to-be-detected electronic current transformer, and a temperature adjustment device which is used for adjusting the temperature of a detection environment of the to-be-detected electronic current transformer. The control processing part enables the current signals, detected under different detection environment temperatures, of the electronic current transformer to be compared with a standard current signal, and carries out the corresponding processing of the comparison result, so as to achieve the verification of the electronic current transformer. The system can achieve the full-automatic verification of the detection precision during the batch production and verification of related electronic current transformers, and effectively improves the verification precision and efficiency. Moreover, the detection precision obtained through verification is closer to the actual detection precision, so the system is higher in verification reliability, and is higher in reliability of detection precision.

Provided is an electronic transformer full-automatic debugging system. The input end of a standard transformer and the input end of a detected electronic transformer are simultaneously connected to the output end of a standard source, the output end of the standard transformer is connected to the analog quantity input end of an electronic transformer calibrator, the output end of the detected electronic transformer is connected to the digital input end of a merging unit through an optical fiber, and the digital output end of the merging unit is connected to the digital quantity input end of the electronic transformer calibrator through an optical fiber. The electronic transformer full-automatic debugging system comprises a control platform. The control platform comprises a DSP chip and a single-chip microcomputer which are connected. The DSP chip is connected with an Ethernet interface and a USB interface board. The Ethernet interface is connected with the electronic transformer calibrator, and the USB interface board is connected with a background computer. The single-chip microcomputer is connected with an RS232 interface which is connected with the control end of the standard source. By means of the electronic transformer full-automatic debugging system, calibration accuracy and calibration efficiency are improved, and the calibration security risk is greatly reduced.

The invention provides an original point calibration system applied to automation equipment. The automation equipment comprises a joint base, a joint moving portion, and a motor used for driving the joint moving portion to move. The original point calibration system comprises an encoder, a calibration component, an original point sensor and a controller, wherein the encoder is mounted on the motorand used for recording the position of the joint moving portion; when the joint moving portion moves relative to the joint base until the calibration component is aligned with the original point sensor, the original point sensor outputs a trigger signal; and the controller is connected with the original point sensor and the encoder and used for receiving the trigger signal output by the originalpoint sensor, obtaining an encoder value of the encoder at the very moment when starting receiving the trigger signal, and determining an encoder value corresponding to an original point according tothe obtained encoder value. The system is used for achieving full-automatic original point calibration of the automation equipment including robots and the like, for improving the calibration precision and for reducing errors.

The invention belongs to the field of industrial process control, and particularly relates to a device and a method for automatic calibrating in a water treatment analog data collecting system, which solves the problems that the existing calibrating method for the water treatment analog data collecting system has big error, can't meet industrial standard, is complicated to operate, and is poorly universal. The automatic calibrating device includes a single chip control module, a DA conversion module, a VI transformation module, an LCD module, a keyboard input module and an analog input interface module. The calibrating method based on the device is that: the single chip control module controls the DA conversion module and the VI transformation module to form a standard current signal for the analog input interface module, the analog input interface module completes the communication between a to-be-calibrated analog input integrated circuit board and the single chip control module, soas to perform the data exchange between the analog input integrated circuit board and the single chip control module, the analog input integrated circuit board is calibrated under the control of the single chip control module as per the industrial standard current signal provided by the single chip control module, and the calibration error coefficient is stored.

The invention relates to the technical field of electrical metering, and discloses an automatic calibration device for a digital universal meter. The device comprises a controller, a calibration source, a switching unit and an image acquisition unit, wherein the controller is used for outputting a first instruction for controlling the calibration source to generate a standard signal and a second instruction for controlling the switching unit to switch between different paths of the digital multimeter; the calibration source is used for generating a corresponding standard signal according to the first instruction; the switching unit is used for switching to the corresponding path according to the second instruction and transmitting the standard signal generated by the calibration source tothe switched path so as to enable the digital multimeter to execute measurement; the image acquisition unit is connected with the controller and is used for acquiring a reading image of the digital multimeter and outputting the reading image to the controller; and the controller is also used for identifying the reading image to obtain the reading of the digital multimeter, calculating an error according to the obtained reading, and judging whether the digital multimeter is out of tolerance or not according to the calculated error. Therefore, full-automatic calibration of the digital multimetercan be realized.