3results about How to "Stable waveform" patented technology

The application discloses a test system and a test method for simulating the stress wave action of a columnar charge blast hole, and relates to the technical field of rock dynamics and blasting engineering. The test system comprises a dynamic loading system, an incidence system, a stress wave conversion body and a sample model. The dynamic loading system generates a plane stress wave. The plane stress wave is conducted to the stress wave conversion body through the incidence system. The stress wave conversion body is attached to the sample model half-cylindrical channel through a semi-cylindrical pressure-arc surface, and the plane stress wave is converted into a cylindrical stress wave acting on the sample. The application generates controllable plane stress waves through the dynamic loading system, and the plane stress waves are shaped and directed through the incidence system, so that the waveform is stable, the energy loss is low, and the input conditions are consistent. The stress wave conversion body converts the plane stress wave into a cylindrical stress wave attached to the columnar blast hole through a plane-arc structure, highly simulates the radial diffusion characteristics of the real blasting stress wave, and realizes the simulation of the columnar charge blast hole blasting stress wave loading in the laboratory.

This invention discloses an experimental system and method for simulating the stress wave effect of a cylindrical charge blast hole, relating to the fields of rock dynamics and blasting engineering. The system includes a dynamic loading system, an incident system, a stress wave converter, and a sample model. The dynamic loading system generates a plane stress wave, which is transmitted through the incident system to the stress wave converter. The converter, through a semi-cylindrical pressure arc surface, conforms to the semi-cylindrical channel of the sample model, converting the plane stress wave into a cylindrical stress wave that acts on the sample. This invention generates a controllable plane stress wave through the dynamic loading system, which is shaped and directionally transmitted by the incident system, ensuring waveform stability, low energy loss, and consistent input conditions. The stress wave converter, with its flat-arc structure, converts the plane stress wave into a cylindrical stress wave conforming to the cylindrical blast hole, highly simulating the radial diffusion characteristics of real blasting stress waves. This allows for the simulation of stress wave loading during a cylindrical charge blast hole blast in a mine within the laboratory.

The application relates to the technical field of filters, and provides a resonant sheet filter and an antenna. The former comprises a shell and resonant sheets; the inside of the shell has a containing cavity, and the outer wall of the shell is provided with a debugging piece; a plurality of resonant sheets are arranged in the containing cavity, and the resonant sheets are provided with through holes corresponding to the debugging piece; a frequency debugging piece is arranged in the through holes to form a ring-shaped coupling. The ring-shaped coupling structure arranged in the through holes has the beneficial effect of significantly expanding the frequency debugging range, and can effectively reduce the situation of unstable waveform caused by the frequency debugging piece deviating from the center during the debugging process. Due to the characteristics of significantly expanding the frequency debugging range and stable waveform during the debugging, the resonant sheet filter is easier to debug, is not sensitive to the tolerance of each component during assembly, and is more conducive to batch production.