The shock wave test of naval gun is of great significance to the safety of the appraisers and the impact on other equipment and parts around the muzzle. In order to test the size and distribution of the muzzle shock wave of a naval gun, a set of shock wave testing system is built, and the test of ammunition under high or low temperature is carried out. On this basis, three interpolation methods of equal pressure surface are analyzed. Finally, we adopt the B-spline method to draw the isobaric field surface and isobaric curve of muzzle shock wave. The results show that the maximum pressure appears at 1 m behind the muzzle, and then the shock wave pressure decreases rapidly, and the attenuation velocity of the shock wave behind the muzzle is significantly greater than that in front of the muzzle; The isobaric line density near the muzzle is higher than that in other areas, conforming to the distribution characteristics of shock wave, and verifying the correctness of the test method; When launching ammunition with high temperature, the density of isobars near the muzzle is much higher than that of low temperature ammunition. The distribution of isobars can provide reference for evaluating the impact of shock wave on other equipment and parts around the muzzle.

Given the broad monitoring range and long monitoring time of anchor bolt loosening of draught fan, and harsh site environment in offshore wind power projects, a remote temperature and pressure monitoring system was designed in this study to realize the real-time wide-range monitoring of anchor bolt loosening of draught fans. The strain pressure transducer and platinum thermistor were used at the test end to acquire the pressure and temperature data, respectively. stm32f103 was used as the master controller in the acquisition system, hierarchical networking was conducted via Modbus protocol, and the long-distance transmission was realized by a fiber optical transceiver. LabVIEW was used by the upper computer to establish the client side to implement the data acquisition, storage and real-time monitoring.