Abstract: A gimbal system includes a gimbal configured to support an imaging assembly, one or more processors, and a storage device storing program instructions that, when being executed by the one or more processors, cause the one or more processors to, in response to an image re-shooting instruction, obtain a target angle of the gimbal based on a reference shooting trajectory, adjust an angle of the gimbal to the target angle to allow the imaging assembly to capture a current image frame, and adjust the angle of the gimbal to a desired angle based on the current image frame to allow the imaging assembly to perform image re-shooting.

Abstract: The present disclosure belongs to the field of geological exploration, and particularly relates to a seismic acquisition system based on a frequency domain expansion MEMS sensor, aiming at solving the problem that vibration frequencies exceed the frequency range of the MEMS sensor due to strong vibrations and cross coupling of multi-frequency signals usually occurring in well logging while drilling. When the MEMS sensor suffers strong vibrations or the MEMS sensor that can be selected cannot ensure that the frequency requirement of a measurement signal is stably met, the frequency domain expander of the present disclosure expands the frequency domain of a detection signal, so that the MEMS sensor can measure strong vibrations and out-of-band frequencies to a certain extent, the application range of the seismic acquisition system is extended, and the anti-mutation capability of the seismic acquisition system is improved.

Abstract: A pump head element and a pump head comprising same, and a container. The pump head element comprises a buffer liquid portion (11), an opening portion (12), and a closed end (13); the opening portion (12) has one end communicated with the buffer liquid portion (11) and the other end connected to the closed end (13); the internal space of the buffer liquid portion (11) and the internal space of the opening portion (12) are defined as liquid storage space (14); the liquid storage space (14) has one end closed by an externally provided piston (2) and the other end closed by the closed end (13); and the opening portion (12) comprises an opening (15) through which liquid to be extracted enters or leaves the liquid storage space (14).

Abstract: An initial positioning system and method for liquid measuring and taking. The system comprises a measuring passage, a variable pressure chamber, and a piston, an initial end of the measuring passage being in communication with the upper part of the variable pressure chamber; the piston reciprocates in the variable pressure chamber to cause a change between positive pressure and negative pressure in the variable pressure chamber; the initial positioning system further comprises a pressure relief port located on the wall of the variable pressure chamber and capable of communicating with the outside of the variable pressure chamber; when the piston is located at the pressure relief port, and the inside and outside of the variable pressure chamber are in communication, the maximum volume of the liquid that can be accommodated in the variable pressure chamber is not smaller than one third of the total volume of the variable pressure chamber.

Abstract: An initial positioning system and method for liquid measuring and taking. The system comprises a measuring passage, a variable pressure chamber, and a piston, an initial end of the measuring passage being in communication with the upper part of the variable pressure chamber; the piston reciprocates in the variable pressure chamber to cause a change between positive pressure and negative pressure in the variable pressure chamber; the initial positioning system further comprises a pressure relief port located on the wall of the variable pressure chamber and capable of communicating with the outside of the variable pressure chamber; when the piston is located at the pressure relief port, and the inside and outside of the variable pressure chamber are in communication, the maximum volume of the liquid that can be accommodated in the variable pressure chamber is not smaller than one third of the total volume of the variable pressure chamber.

Abstract: An apparatus for controlling a thyristor controlled series capacitor connected to a power transmission line. A thyristor firing control includes a unit for effectuating a desired capacitor voltage zero crossing in dependence of a line current and a capacitor voltage in response to a command signal. A command control provides the command signal to the thyristor firing control. The command control includes a damping control including a damper configured to damp at a least one discrete frequency.

Abstract: The present invention relates to a rippled edge beveler comprising a wheelhead feeding mechanism having an upper planker and a grinding wheel, wherein the upper planker 2 is connected to the middle planker which is connected to the lower planker fixed on the grinding wheel beam. A drive motor is joined to the lower part of the grinding wheel beam, the drive motor connected to a driving gear which engages the middle gear. The spin axis is connected to the middle gear. Several driven gears are joined to the middle of the spin axis. The driven gears are connected to the input end of the worm screw decelerator, whose output end is connected to the vertical shaft, whose end is connected to the middle planker. The present structure is reliable to use, convenient and easy to install and pleasing to the eye.

Abstract: The present invention relates to a rippled edge beveler comprising a wheelhead feeding mechanism having an upper planker and a grinding wheel, wherein the upper planker 2 is connected to the middle planker which is connected to the lower planker fixed on the grinding wheel beam. A drive motor is joined to the lower part of the grinding wheel beam, the drive motor connected to a driving gear which engages the middle gear. The spin axis is connected to the middle gear. Several driven gears are joined to the middle of the spin axis. The driven gears are connected to the input end of the worm screw decelerator, whose output end is connected to the vertical shaft, whose end is connected to the middle planker. The present structure is reliable to use, convenient and easy to install and pleasing to the eye.