5results about How to "Reduce conversion error" patented technology

This invention discloses a pole-to-optical cable positioning method based on distributed optical fiber sensing and topology matching, relating to the field of power communication optical cable operation and maintenance technology. The method includes: acquiring Brillouin frequency shift signals, ambient temperature, and icing thickness to perform signal denoising; calibrating the denoised signal to obtain a calibrated frequency shift signal; extracting the optical position of the optical cable at the pole's suspension point using the signal abrupt change characteristics of the suspension point and constructing a suspension point feature set; calculating a dynamic sag correction coefficient based on ambient temperature, icing thickness, and optical cable stress to convert the optical length of the optical cable to its actual geographical length; and establishing a three-dimensional mapping relationship to complete the optical cable location. This invention relies on BOTDA / BOTDR distributed optical fiber sensing equipment and OTDR equipment, and through a process logic of data acquisition, signal processing, dynamic correction, topology mapping, and self-healing update, achieves the associated positioning of poles and optical cables, solving the problem of inaccurate correspondence between the optical cable's optical position and the pole, and improving the accuracy of pole attribution.

This invention discloses a pole-to-optical cable positioning method based on distributed optical fiber sensing and topology matching, relating to the field of power communication optical cable operation and maintenance technology. The method includes: acquiring Brillouin frequency shift signals, ambient temperature, and icing thickness to perform signal denoising; calibrating the denoised signal to obtain a calibrated frequency shift signal; extracting the optical position of the optical cable at the pole's suspension point using the signal abrupt change characteristics of the suspension point and constructing a suspension point feature set; calculating a dynamic sag correction coefficient based on ambient temperature, icing thickness, and optical cable stress to convert the optical length of the optical cable to its actual geographical length; and establishing a three-dimensional mapping relationship to complete the optical cable location. This invention relies on BOTDA / BOTDR distributed optical fiber sensing equipment and OTDR equipment, and through a process logic of data acquisition, signal processing, dynamic correction, topology mapping, and self-healing update, achieves the associated positioning of poles and optical cables, solving the problem of inaccurate correspondence between the optical cable's optical position and the pole, and improving the accuracy of pole attribution.

The invention discloses a motor torque determination method and device, equipment, a medium and a program product, and is applied to the field of vehicle control. The method comprises the following steps: acquiring first motion state data of a vehicle, wherein the first motion state data comprises a first vehicle running speed and a first steering wheel rotation angle; according to the first vehicle running speed, a first torque mapping curved surface corresponding to a first vehicle running speed interval where the first vehicle running speed is located is determined, and the first torque mapping curved surface is used for representing the mapping relation between the motion state data and the motor torque in the first vehicle running speed interval; the motion state data comprises a vehicle driving speed and a steering wheel rotation angle; and determining the motor torque mapped with the first steering wheel rotation angle and the first vehicle running speed in the first torque mapping curved surface as the motor torque of the vehicle. The method can solve the problem that vehicle steering is affected due to inaccurate motor torque.

The invention provides a sine and cosine angle transcoding tracking converter and electronic equipment, a tracking module performs tracking processing according to externally input sine voltage and cosine voltage so as to output sine codes and cosine codes to a sine and cosine signal correction unit; the sine and cosine signal correction unit generates a sine correction signal and a cosine correction signal according to the current temperature, the sine code and the cosine code transmitted by the temperature sensor, and transmits the sine correction signal and the cosine correction signal to the conversion unit; the conversion unit generates an angle output code according to the sine correction signal and the cosine correction signal. And a closed feedback loop is arranged in the tracking module, so that the sine code and the cosine code can change along with the sine voltage and the cosine voltage, thereby reducing the conversion error and ensuring the accuracy of the final conversion result.

The application discloses a method for converting user precise point positioning results into CGCS2000 coordinates, comprising the following steps: based on the precise GNSS satellite orbit and clock error products provided by IGS, performing GNSS precise point positioning data processing on a user survey station and at least three IGS survey stations respectively to obtain respective precise point positioning results; according to the precise point positioning results of the IGS survey stations at the same ephemeris and the corresponding CGCS2000 coordinates, constructing an indirect adjustment error equation to solve the conversion parameters of the conversion of the precise point positioning results into the CGCS2000 coordinate system; and based on the conversion parameters, converting the precise point positioning results of the user survey station to obtain the CGCS2000 coordinates of the user survey station. The application provides a prerequisite basis for the high-precision measurement engineering coordinate conversion of precise point positioning results, so as to enhance the usability of the precise point positioning technology in actual engineering projects.