9results about How to "Stable waveform" patented technology

The invention provides a radio frequency signal generator and radio frequency ablation equipment, and the radio frequency signal generator comprises a signal source; the power driving assembly is connected with the signal source; the power output assembly is connected with the power driving assembly; the data detector is connected with the power output assembly; the master controller is connected with the data detector; the power output assembly comprises a temperature compensation circuit. The temperature compensation circuit is used for adjusting the voltage of a target element connected in the power output assembly. And the accuracy of the output radio frequency signal is improved.

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.

The utility model aims to provide the capacitor test module capable of realizing constant current charging and discharging, which only needs a single constant current source, can realize quick response, and ensures stable waveforms at two ends of the capacitor at the same time. The device comprises a processing module, a power supply module, a constant current source module and an acquisition and adjustment module, the input end of the acquisition and adjustment module is connected with a capacitor to be measured, the output end of the acquisition and adjustment module is connected with the processing module, and the power supply module is in power supply connection with the processing module, the constant current source module and the acquisition and adjustment module. The constant current source module comprises a current feedback amplifier, a first operational amplifier and a charging and discharging switch unit, the output end of the current feedback amplifier and the input end of the first operational amplifier are both connected with a capacitor to be tested, and the input end of the current feedback amplifier and the output end of the first operational amplifier are both connected with a common port of the charging and discharging switch unit. A common port of the charging and discharging switch unit is connected with the charging end and the discharging end. The capacitor testing device is applied to the technical field of capacitor testing.

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.

The present invention discloses a vehicle bus level detection device, which belongs to the field of electronics, and comprises an OBD port bus selection network circuit, a signal adjustment circuit and an output circuit connected in sequence, wherein: one end of the OBD port bus selection network circuit is used to connect various diagnostic ports in the vehicle OBD interface, and receive the level signal sent by the vehicle OBD diagnostic port, and the OBD port bus selection network circuit is also used to connect with the IO port line of the MCU to control the selection of the OBD port pin; the signal adjustment circuit is connected to the other end of the OBD port bus selection network circuit, and is used to adjust the line level of the vehicle end to the signal level range that the MCU can recognize, and send the adjusted level signal to the output circuit, and the output end of the output circuit is used to connect with the AD conversion port of the MCU. The present invention can enable vehicle maintenance personnel to quickly and accurately understand the bus distribution of the OBD port, so as to quickly and accurately judge the level and waveform of each pin of the vehicle OBD, and improve maintenance efficiency.

This invention discloses a wave-absorbing device for a supergravity wave model box. The device includes a wave model box, a wave generator, a grid plate, a series of multi-stage wave-absorbing plates, and a wave-absorbing guide pipe. The wave generator is installed at the upper part of the wave-generating end of the wave model box, generating stable waves with a fixed frequency and height by slapping the water surface. The grid plate is vertically installed inside the wave model box between the wave-generating end and the wave-absorbing end, used for initial wave breaking and absorption. The series of multi-stage wave-absorbing plates are installed at the wave-absorbing end inside the wave model box, arranged in a sloping manner, for further wave breaking and absorption. The wave-absorbing guide pipe is installed on the outside of the wave model box, with one end connected to the wave-absorbing end and the other end connected to the wave-generating end. Active wave absorption is achieved through the wave-absorbing material inside the guide pipe and the movement of water flow. This invention can provide an efficient experimental platform for the research of wave-related issues in marine engineering.

In order to overcome the problem that the existing underwater wireless signal transmission system cannot adapt to underwater equipment with different power supply requirements and command update requirements, the present invention proposes a wireless signal transmission system with switchable working modes. The primary side coil in the present invention is composed of N primary side sub-coils with the same structural parameters that are coaxial and layered. Correspondingly, the primary side power compensation circuit is composed of N-1 primary side power compensation sub-circuits. By controlling and changing the function of the primary side sub-coil and selecting the corresponding primary side power compensation sub-circuit, the power transmission power and information transmission rate are changed, so as to achieve a working mode that adopts different power transmission powers and information transmission rates according to the different needs of underwater equipment, prevent serious overflow of information transmission rate and the occurrence of too slow charging speed, so that the output power of the underwater charging base station can be effectively utilized to the greatest extent, and improve the overall efficiency of power supply and command update of underwater equipment.

The embodiment of the invention provides a grounding control method and device for a power distribution network, equipment and a storage medium, and relates to the technical field of power systems. The grounding control method comprises the following steps: acquiring current on a live wire; when the current is greater than or equal to the first preset current, judging that the power distribution network leaks electricity; and the grounding control unit applies potential which is equal to the leakage potential in amplitude and opposite to the leakage potential in phase to the zero line. According to the grounding control method, device and equipment of the power distribution network and the storage medium provided by the embodiment of the invention, when an electric leakage fault is detected, the potential which is equal to the electric leakage potential in amplitude and opposite to the electric leakage potential in phase can be applied between the null line and the ground wire, so that the voltage to ground of the null line is quickly clamped to zero, and residual current of the electric leakage fault is eliminated.