71results about How to "Achieving self-calibration" patented technology

The invention provides an optical axis included angle calibrating and focusing method and system and double-camera equipment. The calibrating method includes the steps that focusing is conducted on any feature point of a shot object, so that a first object distance value is acquired; the first imaging point coordinate value of the feature point on a first camera is determined; the second imaging point coordinate value of the feature point on a second camera is determined; the optical axis included angle of the double-camera equipment is determined according to the first imaging point coordinate value, the second imaging point coordinate value, the prestored parameters of the double-camera equipment, the first object distance value and a prestored optical axis included angle calculation formula. According to the technical scheme, self-calibration focusing of the double-camera equipment is achieved.

The invention provides a magnetic measurement apparatus based on atomic quantum effects, which is different from a present apparatus of measuring magnetic field strength. The method and apparatus of the invention utilize the energy level fission of high excitation state atoms caused by the Zeeman effect under the effect of a weak external magnetic field, and accurately controls the excitation frequency of an ultra-narrow line width laser to measure the spectral signal division based on EIT under the magnetic field effect. The intensity of a magnetic field to be measured can be calculated according to a division width. The multiple fission of the atomic magnetic energy level caused by the weak magnetic field Zeeman effect is linear, and accordingly, through fitting measurement results of widths of a plurality of division peak values, the self calibration of the intensity of the measured magnetic field can be realized. The new magnetometer can realize magnetic field intensity measurement with the sensitivity less than 0.1 T, and effectively improve the measurement precision with the further compression of a laser frequency line width. Moreover, the measured magnetic field strength can be effectively traced to an atom transition frequency, and excellent measurement accuracy and self-calibration can be realized.

The invention discloses a novel high-precision capacitor self-calibration analog-to-digital converter of a successive approximation type, and the converter is characterized in that the converter comprises a plurality of adjustment capacitor arrays, a calibration storage unit, a successive approximation control logic unit, and a calibration control logic unit; each to-be-adjusted sampling capacitor Ci is connected with one adjustment capacitor array; each adjustment capacitor array comprises a compensation capacitor and a residual capacitor; the upper electrode plate of each compensation capacitor and the upper electrode plate of each residual capacitor are respectively connected with a common end of the upper electrode plate of the corresponding sampling capacitor; the lower electrode plate of each compensation capacitor and the lower electrode plate of the sampling capacitor Ci; the lower electrode plate of each residual capacitor is connected with the lower electrode plate of the sampling capacitor Ci+1; the output end of a comparator is connected with the calibration storage unit through a gating switch and the calibration control logic unit; the calibration storage unit is connected with the switching control end of each compensation capacitor and the switching control end of each residual capacitor; the output end of the comparator is connected with the switching control end of the lower electrode plate of each sampling capacitor through the gating switch and the successive approximation control logic unit.

A method includes the steps of providing a common DC bus to interconnect power elements to a DC distribution system using power converters. A first group of one or more of the elements (main element) is used to execute the primary function by automatically maintaining the DC bus voltage following a set point. The DC bus voltage set point is intentionally changed with slow dynamics according to a secondary function executed by the main element such that the average DC bus voltage regulated by the main element changes. A local logic is used on each of the power elements connected to the DC bus but different from the main element to modify their power generation or consumption as a result of changes in the measured average DC bus voltage such that they contribute to the fulfillment of the secondary level of control.

The present invention relates to a selfcalibration of capacitive pressure sensors with electrostatic forces. A pressure sensor calibration system comprises one or more pressures sensors for calibrating sensor parameters based on a membrane deflection or a membrane displacement from an electrostatic force. A measuring component measures capacitance values corresponding to applied voltages at the electrodes of the one or more pressure sensors. Sensor parameters are derived from capacitance measurements and a pressure measurement, which are utilized by a calibration component for calibration and recalibration of the one or more pressure sensors.

The invention provides a moving platform binocular ranging self-calibration method and device. The method comprises the following steps of acquiring the coordinates in a target image corresponding toa to-be-measured target acquired by two image acquisition devices, and the pose information of the two image acquisition devices; determining the target position of the to-be-measured target accordingto a transmission projection equation set established by the two coordinates and the two pose information; establishing a target function for minimizing a reprojection error; optimizing the pose information and the target positions of the two image acquisition devices to gradually reduce the target function; when the minimized reprojection error is smaller than a preset error threshold, stoppingiteration, and outputting an attitude angle compensation value and a calibrated target position; when a next target image of the to-be-measured target at the next acquisition moment is acquired, calculating the initial values of the two image acquisition devices at the next acquisition moment according to the attitude angle compensation value and the calibrated target position; and repeating the above steps until the ranging of the to-be-measured target is completed. According to the present invention, the measurement precision of a ranging system can be improved.

The invention discloses a capacitance calibration method for a successive approximation type ADC (Analog to Digital Converter). The capacitance calibration method comprises the following steps: initializing differential mode digital weights and single-ended mode digital weights of all capacitors to be calibrated in a switched capacitor module according to digital weights of ideal capacitors; obtaining the actual digital weight of each capacitor to be calibrated in the differential mode in sequence, and assigning the digital weight corresponding to the differential mode; sequentially acquiring the actual digital weight of each capacitor to be calibrated in the single-ended mode, and assigning the actual digital weight to the corresponding single-ended mode digital weight; assigning each differential mode digital weight or each single-ended mode digital weight to each actual final digital weight according to the selected differential mode or single-ended mode; and adding the analog output signal of the successive approximation type ADC by bit by using each actual final digital weight to obtain a digital output signal. According to the invention, self-calibration of the capacitor can be realized, and an additional calibration capacitor array is not needed.

The invention relates to a terahertz radar detection system based on a Zynq platform and a method thereof. The system comprises a terahertz transmitting and receiving device, a Zynq processing platform, a control system, an upper computer and a two-dimensional motor. The terahertz transmitting and receiving device is in communication connection with the input end of the Zynq processing platform; the output end of the Zynq processing platform is in communication connection with the input end of the control system and the upper computer; and the output end of the control system is in communication connection with the control two-dimensional motor and the terahertz transmitting and receiving device. According to the terahertz multi-channel radar detection system based on the Zynq platform and the method thereof, the frequency synthesis and modulation waveform generation assembly is controlled by the control system, linear frequency modulation signals of continuous waves, narrow bands and wide bands are generated according to different detection modes, the Zynq processing platform serves as a core processing unit, so that the functions of multi-channel intermediate frequency echo data processing, self-calibration, target searching, high-resolution imaging and the like can be realized.

A cell voltage monitoring and self-calibrating device for a plurality of battery cells connected in series is disclosed. The device includes a first voltage measurement unit, a second voltage measurement unit, a first compensation unit, a second compensation unit and a calculating unit. It can measure voltages of each cell in a battery pack which provides power to electric equipment and calibrates itself during measurement.

The invention discloses an on-line calibration system and method of a PM2.5/PM10 light scattering particulate matter monitor. The on-line calibration system consists of a particulate matter dynamic dilution and laminar flow mixer, a high efficiency filter, an air compressor, a frequency conversion fan, a mass flow controller, a constant speed sampling head, a particulate matter filter membrane collector and a constant current sampler. The on-line calibration system and method can calibrate the zero point, linearity and indication error of an instrument, eliminate the influences of environmental factors on the measurement results, and ensure the traceability and reliability of the measurement results. The calibration system and method can be integrated into a light scattering particle monitor, and can also be used as an independent calibration system to realize self-calibration, dynamic calibration and current calibration of the light scattering particle monitor.

The invention discloses an MOCVD equipment real-time temperature measurement system self-calibration method and belongs to the technical field of semiconductor manufacture. The method includes according to an actual heat radiation ratio, arranging a point according to the actual heat radiation ratio on a theoretical heat radiation ratio-temperature curve trace, substituting the temperature value T corresponding to the point into a calculation formula, and acquiring calibration coefficients m1 and m2. By the aid of the method, the calibration coefficients m1 and m2 corresponding to a first wavelength lamda 1 and second wavelength lamda 2 of a dual wavelength temperature measurement structure can be acquired, the MOCVD equipment real-time temperature measurement system self calibration is implemented, and the consistence and accuracy of epitaxial film growth temperature measurement can be guaranteed.

The invention discloses a film growth reaction chamber equipment real-time temperature measurement system self calibration device and belongs to the technical field of semiconductor manufacture. The device comprises an actual heat radiation ratio acquisition unit and a calibration coefficient calculation unit; the actual heat radiation ratio acquisition unit is used for acquiring an actual heat radiation ratio; the calibration coefficient calculation unit is used for arranging a point according to the actual heat radiation ratio on a theoretical heat radiation ratio-temperature curve trace, substituting the temperature value T corresponding to the point into a calculation formula, and acquiring calibration coefficients m1 and m2. By the aid of the device, the calibration coefficients m1 and m2 corresponding to a first wavelength lamda 1 and second wavelength lamda 2 of a dual wavelength temperature measurement structure can be acquired, the film growth reaction chamber equipment real-time temperature measurement system self calibration is implemented, and the consistence and accuracy of epitaxial film growth temperature measurement can be guaranteed.

The invention provides a CMOS self-calibrating light intensity monitoring integrated circuit. In a light intensity measuring circuit, the output end is connected with the input end of a current voltage linear conversion circuit. The input end of the current voltage linear conversion circuit is connected with the output end of the light intensity measuring circuit and the first input end 3a of a self-calibrating/monitoring control switch array. The first input end of the self-calibrating/monitoring control switch array is connected with the output end of the current voltage linear conversion circuit. The second input end SEL is a self-calibrating control input end. The first output end and the second output end are connected with the first input end and the second input end of an output voltage sampling and holding circuit respectively. The first input end and the second input end of the output voltage sampling and holding circuit are connected with the first output end and the second output end of the self-calibrating/monitoring control switch array. The first input end and the second input end of a comparison amplifying circuit (5) are connected with the first output end and the second output end of the output voltage sampling and holding circuit respectively. The output end OUT2 is the output end of the circuit provided by the invention.

The invention discloses an intelligent sensor and an intelligent method thereof, and the intelligent sensor comprises a sensor module, a circuit switch module, a signal conditioning module and a processor; the sensor module is disconnected or connected with the signal conditioning module through the circuit switch module, and the processor is connected with the signal conditioning module and the circuit switch module; the sensor module is used for collecting measured data; the signal conditioning module is used for receiving and processing the data acquired by the sensor module and sending thedata to the processor; the processor is used for processing the data processed by the signal conditioning module and sending a control instruction to the circuit switch module; and the circuit switchmodule is used for receiving a control instruction of the processor to connect or disconnect the sensor module and the signal conditioning module. Through combined use of the processor and the basicsensor, the sensor is endowed with an intelligent capability, and an intelligent function is realized.