3results about How to "Solve limited problems" patented technology

The invention discloses a birotor surface pressure measurement system and method based on double endoscopic pressure sensitive paint, and belongs to the technical field of turbomachinery pressure measurement. The method mainly comprises a double-endoscopic type optical pressure sensitive measuring system, a double-rotor phase locking system of a photoelectric sensor and an encoder and a double-endoscopic type rotor surface pressure synchronous measuring method, excitation and imaging of PSP are integrated in the same hard rod type endoscope, an optical straight rod endoscope with a 70-degree viewing angle is adopted, the visual field angle is 90 degrees, and the optical straight rod endoscope and the optical straight rod endoscope are integrated. And the endoscope rod extends into the flow field for a certain length, so that the acquisition of a global rotor blade image is realized. An endoscopic detection hole is formed, an optical endoscope is installed on the wall face of a cartridge receiver, a camera and the endoscope are fixed through a three-dimensional displacement mechanism, and the stability of an endoscopic measurement system is guaranteed. The reflective patch is attached to a rotor rotating shaft, the photoelectric sensor directly faces the reflective patch, external trigger signals of the photoelectric sensor are transmitted to the signal generator and the multi-channel data acquisition system respectively, and the signals are used for controlling light emitting of the light source and shooting of the camera on one hand and used for phase locking of the rotor on the other hand. And the encoder is arranged at one end of the motor shaft, is connected with the multi-channel data acquisition system, and is combined with the photoelectric sensor to jointly realize phase locking of the double rotors. Dark background images Id1 and Id2 and reference images Ir1 and Ir2 of the birotor are shot, and the corresponding reference pressures are Pr1 and Pr2 respectively. A phase-locked enhanced image synchronous acquisition method is adopted to obtain light-emitting images I1 and I2 of the surface of the rotor. And finally obtaining pressure distribution P1 and P2 of the surfaces of the double-rotor blades through image processing and a pressure sensitive coating calibration relational expression.

The present invention relates to the technical field of tunnel construction, and provides a construction method for the expansion and reconstruction of a single-sided widening of an existing tunnel. The starting section of the existing tunnel for expansion and reconstruction is determined according to lining detection information and surrounding rock survey information. The starting section is located in the middle section of the existing tunnel. The starting section is expanded and reconstructed, and then the expanded and reconstructed starting section is used to perform advance support on adjacent tunnel sections in the first direction, and the expanded and reconstructed starting section is used to perform advance support on adjacent tunnel sections in the second direction. The remaining tunnel sections in the first direction are expanded and the remaining tunnel sections in the second direction are expanded to complete the expansion and reconstruction of the existing tunnel. The present application sets the starting section in the middle section to solve the problem of limited construction surface, and can carry out synchronous construction from both ends of the starting section. It can increase multiple construction surfaces according to the construction period requirements, and can also reduce the disturbance of the surrounding rock, reduce the engineering risk, and shorten the construction period.

The application provides a wireless link-based missile-borne measurement and control parameter binding and online upgrading method and system. Through multiplexing the wireless upgrading architecture of the original measurement and control link, adopting the standardization data frame format design with fixed length, combining single frame transmission with missile-borne confirmation and frame count increment, the wireless transmission error correction mechanism based on frame count continuous check sum and CRC double verification, and the internal data interaction process of the missile-borne measurement and control combined master control module bus transfer and function module ID matching, combined with a series of schemes such as data read-back comparison verification, the problems of existing wireless transmission error code, independent upgrading and loading of each module, poor data transmission reliability and the like are solved, and independent, reliable and accurate wireless parameter binding and program online upgrading of each function board and sensor unit of the missile-borne measurement and control single machine are realized.