3results about How to "Increase rms" patented technology

This invention proposes a method and apparatus for improving the accuracy of fundamental frequency metrology. The apparatus includes: a UART module for sending the number of clock cycles (baud_cnt) required to transmit one symbol to a calculation module and a control module; a calculation module for calculating the frequency offset of the fundamental frequency (RCH) and, based on the RCH frequency offset, calculating the bandpass filter coefficient (b) in the fundamental frequency metrology device using a pipelined approach, and adjusting the bandpass filter based on the bandpass filter coefficient (b); a control module for process control of the pipelined approach; and a register for receiving and storing relevant data during the operation of the UART module, calculation module, and control module. The method employs the aforementioned apparatus for improving the accuracy of fundamental frequency metrology to calculate the bandpass filter coefficient (b) and adjust the bandpass filter accordingly.

The invention discloses an adjustable printer mechanism and a printer, comprising a base plate, a left chassis, a right chassis, a middle frame assembly and a flip cover assembly. The base plate is provided with a housing hole docking and locking mechanism for positioning and fixing the bottom surface of the right chassis, one end of a rotating shaft for facilitating the integrated assembly connection on the flip cover assembly is rotated and sleeved in the rotating shaft hole of the right chassis, and the other end of the rotating shaft corresponds to the left chassis and moves laterally along the length direction of the base plate, and then adaptively debugs and docks at the corresponding rotating shaft, and the bottom surface of the left chassis is positioned and fixed; a transmission meshing mechanism for adaptively docking the rubber roller is provided between the right chassis and the power receiving end of the rubber roller on the flip cover assembly; a printing self-positioning mechanism for adaptively adjusting and cooperating the rubber roller on the flip cover assembly with the print head on the middle frame assembly is provided between the flip cover assembly and the middle frame assembly. The above three mechanisms cooperate effectively to realize the adaptive docking assembly of the hinged rotating shaft and the print, effectively reduce the assembly accuracy of each movable structural component and improve the reliability of the product.

A contactless power supply device capable of improving power transmission efficiency with a simple structure is provided. A power transmission device (2) of the contactless power supply device (1) comprises: a transmitting coil (13) for supplying power to a power receiving device (3) via a receiving coil (21) provided in the power receiving device (3); a power supply circuit (10) for converting the DC power supplied from the power supply (11) into AC power and supplying the AC power to the transmitting coil (13) via a plurality of switch elements (12a to 12d) connected in a full bridge or half bridge between a power supply 11 for supplying DC power and the transmitting coil 13; an auxiliary coil (14) configured to be electromagnetically coupled with the transmitting coil (13); a variable capacitance circuit (15) connected to the auxiliary coil (14) and having an adjustable electrostatic capacitance; a second communicator (16) for receiving a signal containing a measured value of an output voltage from the power receiving device (3); and a control circuit (17) for controlling the electrostatic capacitance of the variable capacitance circuit (15) according to the measured value of the output voltage.