4results about How to "Elimination speed" patented technology

The invention discloses a ring amplifier circuit adopting a replica bias and bias enhancement technology. The ring amplifier circuit comprises a first amplification stage, a second amplification stage, a third amplification stage, a replica bias loop and an output stage bias enhancement circuit, in the replica bias loop, the circuit structure of a replica branch is the same as that of the second amplification stage, and the circuit parameter of the replica branch is in 1 / N proportion to that of the second amplification stage; the output stage bias enhancement circuit comprises a second amplification stage bias resistor connected in series between the PMOS transistor and the NMOS transistor of the second amplification stage A2, and a cross connection mode from the output of the second amplification stage to the input of the third amplification stage; the cross connection mode is that the high output node voltage of the second amplification stage is connected to the NMOS transistor input of the third amplification stage, and the low output node voltage of the second amplification stage is connected to the PMOS transistor input of the third amplification stage. By designing a replica bias loop and an output stage bias enhancement technology, comprehensive balance between stable performance and high-speed and high-precision performance requirements under different process, voltage and temperature conditions is realized.

The application discloses a high-precision global fitting method and device based on dominant points, relates to the technical field of computer numerical control machining, and specifically comprises the following implementation steps: firstly, taking the cubic polynomial fitting error as the core basis, dominant points in a tool tip point set are adaptively screened; secondly, according to a point error constraint condition, part of the tool tip points are supplemented as new dominant points through an iterative mode, and then an initial B-spline curve is generated; finally, based on a chord error constraint criterion, part of the midpoints of straight line segments are iteratively supplemented as dominant points, and finally, a target B-spline curve is constructed. The global fitting method effectively optimizes the continuity of the path and the degree of restoration of geometric characteristics under the premise of strictly guaranteeing machining precision, provides a high-quality data basis and technical support for subsequent feed speed planning, and is favorable for improving the overall machining efficiency.

The utility model discloses a chain plate feeding desilting device, which comprises a chain plate feeder and a mud-stone separator, a desilting device is arranged below a chain plate of the chain plate feeder, the desilting device comprises an air knife, the air knife comprises an upper blade, a lower blade and side sealing plates, the upper blade and the lower blade are assembled together, and the side sealing plates surround two sides of the upper blade and the lower blade. A plurality of cavities communicated in sequence are formed between the upper blade and the lower blade, one end of each cavity communicated in sequence is communicated with an air inlet of the blade, the other end of each cavity communicated in sequence is communicated with an air outlet of the air knife, and the air outlets spray towards the chain plate feeder. Compared with the prior art, the air knife has the advantages that the mode that the multiple cavities are communicated is adopted in the air knife, then the cavities are sprayed to the chain plate through the exhaust port, high-viscosity soil on the chain plate is dried and blown out of the chain plate feeding machine, corrosion to the chain plate is avoided, the service life is prolonged, and meanwhile the problem that the high-viscosity soil adheres to the chain plate and is caked is solved.

The application discloses a kind of SMT visual feed and in situ welding integrated device, belong to welding equipment technical field, it includes base support, the base support includes by aluminum alloy section composition support and fixedly connected with the bottom plate on support, three-axis motion mechanism is provided on the base support, one-way limit flexible clamping mechanism is provided on the bottom plate.The application constructs "paste-weld-inspection" full closed loop welding integrated device.Through "in situ zero vibration reflow soldering" technology, PCB board keeps absolute stillness in the liquid phase life cycle of solder melting.Thoroughly eliminate the horizontal acceleration and hand shaking caused by artificial handling, perfectly protect the surface tension self-centering effect of liquid solder, compared with the rigidity limit and heating of traditional equipment, the one-way limit flexible clamping mechanism of the application constructs spring plunger "hot breathing" mechanism, actively absorbs the thermal expansion stress of FR-4 plate material under high temperature, ensure that the board is absolutely flat under high temperature, does not occur to arch upwards.