11results about How to "Calibration method is simple" patented technology

The invention discloses an AUV positioning and orientation method based on GNSS double antennas / low-precision SINS / DVL, and belongs to the technical field of autonomous vehicle positioning and orientation, and the method guarantees the accuracy of the course of an AUV on the water surface through the combination of the low-precision SINS / GNSS double antennas; under the water surface, by utilizing the characteristic that the low-precision SINS has good course keeping precision, the SINS and the DVL are combined, the speed information is obtained through the DVL, an SINS / DVL combined navigation system filtering model is established, and the position information of the SINS / DVL is estimated and corrected, so that the positioning and orientation accuracy of the underwater AUV in the navigation process is ensured at lower cost.

The utility model provides a CC output voltage self-calibration circuit. The CC output voltage self-calibration circuit comprises a power supply isolation unit used for outputting a first preset voltage value, a self-calibration reference power supply unit and an isolation AD sampling unit. The self-calibration reference power supply unit outputs a second preset voltage value at the first output end of the self-calibration reference power supply unit after acquiring the first preset voltage value; the second preset voltage value serves as CC output voltage at the same time; a second output end of the self-calibration reference power supply unit is connected with a signal voltage of the charging interface after passing through the resistor and the PTC self-recovery insurance unit; a second preset voltage value connected with the signal voltage passes through the divider resistor and then enters the input end of the isolation AD sampling unit, and the output end of the isolation AD sampling unit is connected with an AD acquisition pin of the MCU; and a charging interface input voltage anti-reverse connection protection circuit and an overvoltage protection circuit. According to the technical scheme, high-precision analog quantity acquisition precision can be obtained without a calibration power supply, and the problem of inaccurate low-voltage AD sampling precision caused by PTC impedance value difference is solved.

The present application provides a sample structure and a method for making it, and a method for calibrating the spatial angle of incidence, wherein the sample structure includes a substrate, a metal film located on the substrate, and a nanostructure located inside or on the metal film. The sample structure is simple, and the manufacturing method is simple, but the near-field light field distribution generated under the irradiation of oblique incident light can be detected by SNOM, and has a good response to the spatial angle of incident light, and can be used for SNOM near-field light field imaging, and then the spatial angle component of the incident light is inferred from the measurement results of the SNOM near-field light field imaging, thereby realizing the calibration of the spatial angle of the incident light of the SNOM device. The calibration method is simple and easy, and the sample structure preparation process is simple. It can be used as a standard sample to calibrate the spatial angle of incident light of scattered scanning near-field optical microscopes of different manufacturers or laboratories. It has a wide range of applications and can be mass-produced.

The present invention provides a robot and laser sensor hand-eye calibration method and device, the method comprising: establishing a user coordinate system of the robot based on a calibration plate; moving the robot according to the user coordinate system, obtaining a first point position of the robot tool end when the laser near field of view of the sensor coincides with a specific edge of the calibration plate; obtaining a second point position of the robot tool end when the laser far field of the sensor coincides with a specific edge of the calibration plate; keeping the posture unchanged, moving the robot position, obtaining a third point position of the robot tool end when the robot TCP is aligned with a spatial recognition point; constructing a hand-eye calibration mathematical model of the robot and the laser sensor; determining a calibration matrix between the robot and the laser sensor based on the first point position, the second point position, the third point position and the mathematical model. Only three points need to be determined and a hand-eye calibration mathematical model needs to be constructed to calibrate, thus avoiding errors caused by multiple manual teachings, simplifying the calibration method, and improving the calibration accuracy.

The built-in heat source heat flow meter calibration device disclosed in the application comprises a heat preservation cylinder, a temperature measuring element and a stirring mechanism. The heat preservation cylinder comprises a containing cavity capable of containing liquid, and the built-in heat source heat flow meter can be inserted into the containing cavity. The temperature measuring element comprises a first temperature measuring element capable of measuring the temperature of the liquid and a second temperature measuring element capable of measuring the axial temperature gradient of the built-in heat source heat flow meter. The stirring mechanism is connected with the containing cavity. The built-in heat source heat flow meter calibration device disclosed in the application has simple structure and convenient operation. The heat preservation cylinder provides the containing cavity of the liquid. The built-in heat source of the built-in heat source heat flow meter heats the heat conductor, the heat conductor transmits heat to the liquid to make the liquid produce temperature rise, the heat flow density can be calculated by measuring the temperature rise of the liquid, the relationship between the heat flow density and the temperature gradient can be established by measuring the axial temperature gradient of the built-in heat source heat flow meter, and the calibration of the built-in heat source heat flow meter can be completed, and the calibration mode is simple.

This application relates to a battery testing system, which includes a testing device, a testing mechanism, and a testing section. The projection of the testing section along a first direction is located on the battery under test. The testing section is used to contact and form an electrical connection with the battery under test, and to collect current signals. The testing section is made of a conductive material with a light transmittance of T1, where T1 ≥ 75%. The technical solution provided by this application solves the problem of cumbersome methods for calibrating light intensity in batteries in related technologies.

This invention discloses a method for calibrating digital I / O channels of a semiconductor test equipment. The steps include: S1, grouping the digital I / O channels of the semiconductor test equipment into groups of at least three, and then using a first calibration board to test and solve the signal transmission and reception delays between the digital I / O channels in each group; S2, regrouping the digital I / O channels using an offset "1" method, and then using a second calibration board to test and solve the signal transmission and reception delays between the digital I / O channels in each newly grouped group; S3, constructing and solving the delay calculation expressions for each digital I / O channel in the transmission and reception directions; S4, using the delay values ​​obtained in step S3 as the basis for compensation to perform delay compensation on the corresponding digital I / O channels, thereby achieving calibration and alignment of each digital I / O channel. This invention solves the problem of signal asynchrony between digital I / O channels of the test equipment without increasing the design difficulty and manufacturing cost of the calibration board.

The present invention discloses a nitrogen oxygen sensor calibration method and a calibration system. The nitrogen oxygen sensor calibration method according to an embodiment of the present invention comprises obtaining a plurality of calibration values; establishing a first equation under a first oxygen concentration according to calibration parameters of the calibration values; establishing a second equation under a second oxygen concentration according to calibration parameters of the calibration values; establishing a calibration equation according to the first equation and the second equation, and the calibration equation is used for calibration of the nitrogen oxygen sensor. The nitrogen oxygen sensor calibration method and the calibration system according to the embodiment of the present invention are simple and easy to implement, and the calibration result is accurate.

The invention relates to the technical field of liquidometer calibration, in particular to an atmospheric storage tank liquid level calibration method. Comprising the following steps: S1, carrying out initial calibration on a liquid level meter on an atmospheric storage tank, determining that the initial calibration of the liquid level meter is unqualified when any item in the initial calibration content is unqualified, and otherwise, determining that the initial calibration of the liquid level meter is qualified; the step S2 is carried out on qualified liquid level meters, and the step S3 is carried out on unqualified liquid level meters; s2, after the liquid level meter on the atmospheric storage tank is used for a set time, the liquid level meter is calibrated in use, the content of the calibration in use is the same as the content of the initial calibration in the step S1, if any one of the content of the calibration in use is unqualified, it is determined that the calibration of the liquid level meter in use is unqualified, and otherwise, it is determined that the calibration of the liquid level meter in use is qualified; s3, the unqualified liquid level meter is subjected to the step S3; s3, performing problem inspection on the liquid level meter; metering calibration of the installed and put-into-production liquid level meter is achieved.

The application relates to a fine tracking imaging coaxial conjugate optical reference calibration method, which comprises the following steps: adjusting a rotating table and a telescope barrel to rotate, recording the trajectory of visible guide light on an optical axis synchronous camera; calculating the center of the trajectory; taking the center of the trajectory as the center and taking the imaging distance corresponding to half the stroke of a quick reaction mirror on the optical axis synchronous camera as the radius to draw a circle on the optical axis synchronous camera; taking the center of the field of view of a visible light camera as a reference point O1 or taking the intersection of the line connecting the center of the field of view of the visible light camera and the center of the trajectory as the reference point O1; according to the reference point O1, the center of the field of view of the optical axis synchronous camera is drawn to the O1 point; the corresponding imaging position of the O1 point on the visible light camera is found out and recorded as an O2 point; the corresponding imaging position of the O2 point on an infrared camera is found out and recorded as an O3 point. The application does not need to rely on external equipment, the fine tracking calibration process is simple, the cost is low, the operation is convenient, and the target tracking point and the laser striking point can be ensured to be the same point.

The invention relates to the technical field of automobile suspension systems, and particularly discloses a commercial vehicle electronic control air suspension self-calibration system and a calibration method.The commercial vehicle electronic control air suspension self-calibration system comprises an electronic control air suspension control system and an air suspension body and has two calibration modes of quick calibration and temporary calibration; during quick calibration, calibration personnel use the calibration limiting tool in combination with an instrument desk calibration process and result prompts, the suspension height does not need to be measured in the calibration process, and a single person can quickly calibrate the suspension height by operating a handheld remote controller of an electric control air suspension system; calibration personnel utilize the single-side and double-side inflation and deflation switching function of a handheld remote controller of the system, in combination with field measurement or a reference tool, the heights of the left suspension and the right suspension are adjusted according to an instrument calibration process and result prompts, so that rapid calibration of the heights of the suspensions is achieved, the maintenance time and cost of an air suspension vehicle type are effectively reduced, and the maintenance efficiency is improved. The air suspension height calibration difficulty is reduced, and the air suspension height calibration precision is improved.