9results about How to "Avoid Calibration Errors" patented technology

The invention provides a carbon fiber prepreg paving real-time positioning calibration method and system. The method comprises the following steps: acquiring paving process parameters which influence the optical characteristics of the surface of a prepreg strip; collecting visual information of the edge of the prepreg strip, and extracting visual characteristics reflecting the optical characteristics of the surface of the prepreg strip from the visual information; presetting an association relationship between the paving process parameters and the visual features; receiving a visual measurement result indicating that the paving position of the prepreg strip has deviation; according to the paving process parameters, the visual features and the incidence relation, the source of paving position deviation is judged; and executing calibration or compensation operation according to the judgment result of the deviation source. According to the invention, invalid calibration or accumulative errors caused by misjudgment can be avoided.

The present application relates to gas detection analysis technical field, especially to a kind of three-electrode oxygen probe's automatic calibration method.Content includes: construct closed calibration box, and the output voltage of standard oxygen concentration and the probe to be calibrated is synchronously collected;Based on standard oxygen concentration variation, construct atmosphere evolution state quantity, combine the output voltage of the probe to be calibrated, calculate electrode response trajectory quantity;Atmosphere evolution state quantity and electrode response trajectory quantity are fused, and relative response characteristic quantity is constructed, combined with the nonlinear response of the probe to be calibrated in different oxygen concentration range and zero drift, dynamic calibration model is constructed, and the oxygen concentration output result after calibration is obtained, and the parameter in dynamic calibration model is iterated and updated, and calibration parameter is obtained.The three-electrode oxygen probe calibration method does not consider gas dynamic diffusion and probe response delay, and lacks effective compensation for nonlinearity and zero drift, which leads to insufficient detection accuracy.

The utility model discloses a positioning mechanism, double position automatic exchange workstation and three -axis machine tool integrated formula electric arc additive manufacturing equipment belongs to metal additive manufacturing technical field. A kind of positioning mechanism, comprising: bottom plate (31) is provided with zero point positioning mechanism (25), the circumferential of zero point positioning mechanism (25) is evenly distributed with several guide posts (32), the upper surface of zero point positioning mechanism (25) is connected with the compression plate (33) for forming interlocking structure with fixture base plate;The lower surface of fixture base plate is connected with two auxiliary plates (34), the lower surface of auxiliary plate (34) is provided with pin sleeve, the upper surface of bottom plate (31) is provided with the pin (35) for with pin sleeve adaptation. The utility model further discloses double position automatic exchange workstation and three -axis machine tool integrated formula electric arc additive manufacturing equipment containing above-mentioned positioning mechanism. The utility model realizes the deep integration of additive system and three -axis machine tool, solves the problem of low precision of external device, debugging difficulty.

The application discloses an image measuring instrument, and relates to the technical field of visual detection.The image measuring instrument comprises an imaging device, a lens and a light source device.The light source device is used for irradiating a measured object and comprises a light splitting prism, a rotating driving mechanism, a first light source assembly and a second light source assembly.The rotating driving mechanism can drive the light splitting prism to rotate, the angle of the light splitting prism is adjusted, the reflecting surface of the light splitting prism is positioned opposite the first light source assembly or the second light source assembly, parallel light is output when the reflecting surface of the light splitting prism is positioned opposite the first light source assembly, and diffused light is output when the reflecting surface of the light splitting prism is positioned opposite the second light source assembly.The scheme can realize non-disassembly switching of the light source, the quick switching of the parallel light and the diffused light can be completed only by rotating the light splitting prism, the operation process is simplified, the light path calibration error caused by frequent disassembly and assembly is avoided, and the consistency of the measurement reference before and after the switching of the light source is ensured.

This invention relates to the field of standard reference material development and evaluation technology, and discloses a precision-based method for controlling and evaluating the uncertainty of calibration standard reference materials. This method effectively guides the design, control, and evaluation of the uncertainty of calibration standard reference materials, promotes the quality improvement and upgrading of standard reference material development, and provides a scientific basis for users to select suitable calibration materials. This invention uses the inherent precision of the measurement method as the core quantitative basis, constructing a complete technical system of "forward design control at the development end - reverse application evaluation at the user end." By establishing a quantitative constraint relationship between the uncertainty of calibration standard reference materials and the uncertainty of the measurement method, the development of calibration standard reference materials is upgraded from empirical judgment to quantitative science. Simultaneously, it provides users with a quantitative basis for selection and evaluation, achieving a precise match between the uncertainty of calibration standard reference materials and the measurement method.

This invention relates to the field of communication technology, and in particular to an industry-specific SMS sending and verification method for preventing spam messages. The method includes: an operator providing a template application platform and dedicated accounts to enterprises holding fixed industry SMS access numbers; after logging in, enterprises submit SMS template applications with variable content annotations; upon approval, they receive a two-digit template number, which, along with the access number, template number, and annotated content, is stored in the industry SMS gateway's storage medium; the enterprise constructs a receiving request using the target mobile number as the receiving address, appending the two-digit template number, the variable content annotations, and the sending end using the access number; the gateway receives the request, intercepts key information, retrieves the corresponding template, removes both curly braces and internal characters, and compares the results; if they match, the SMS is sent; otherwise, it is rejected and a content mismatch message is returned. This invention achieves source control of spam messages and strengthens compliance to improve governance efficiency through template approval and storage, standardized request verification, interception of violations, and code-based log storage.

The application provides a temperature probe frequency response calibration device and method of fast displacement step excitation, the device comprises an experimental section, a calibrated temperature probe, a baffle, a fast displacement mechanism and a photoelectric sensor, the experimental section has stable flow conditions inside, the sensing part of the calibrated temperature probe is arranged in the core area of the experimental section, the movement speed, position and photoelectric sensor signal feedback of the baffle are accurately controlled, the controllability of the heat excitation input time and the accuracy of the heat excitation area are realized. Through the shielding and releasing of the baffle, instantaneous step heat excitation can be generated in millisecond time, the amplitude normalization processing of the output response curve of the calibrated temperature probe is carried out, the dynamic response parameters of the calibrated temperature probe are effectively distinguished, the accuracy of the calibration result is ensured, and the device is suitable for temperature probe frequency response calibration in unsteady flow field measurement.

The utility model relates to temperature instrument calibration technical field discloses a temperature instrument calibration device, including the shell, the detection piece is inserted in the shell inner chamber, be equipped with the calibration subassembly in the detection piece inner chamber. Through the heating rod, the medium in the detection piece is heated to constant temperature, preheats to U -shaped tube, when the temperature that second temperature sensor and first temperature sensor monitored is same, starts first extraction pump, and the medium in the detection piece enters into U -shaped tube through first extraction pipe, and the temperature of the medium in U -shaped tube is transferred to the upper end of metal heat conduction stick, after a period of heat transfer, the temperature of metal heat conduction stick keeps constant, can close and install the to be measured instrument of calibration to the upper end of metal heat conduction stick, in the process of calibrating the to be measured instrument, the medium temperature in detection device keeps constant, thereby can avoid the error of temperature change to calibration operation.