35 results about "Ejection velocity" patented technology

An ink droplet ejection device including: (a) actuators each operable to apply an ejection pressure to an ink stored in a corresponding pressure chamber, for causing an ink ejection through a corresponding nozzle, whereby an image formed as a result of the ink ejection is produced on a medium; and (b) a controller supplying a control signal to each actuator, and including (b-1) a portion operable to incorporate a composite-dot forming pulse train into the control signal, for causing successive ejection of a plurality of ink droplets that cooperate to form a composite dot of the image, and (c) a portion operable to incorporate a non-composite-dot forming pulse train into the control signal, for causing an ejection of a single ink droplet that forms a non-composite dot of the image. The composite-dot forming pulse train and non-composite-dot forming pulse train have respective waveforms configured such that an ejection velocity of the single ink droplet forming the non-composite dot is lower than an ejection velocity of said plurality of ink droplets cooperating to form the composite dot.

An ink droplet ejection device including: (a) actuators each operable to apply an ejection pressure to an ink stored in a corresponding pressure chamber, for causing an ink ejection through a corresponding nozzle, whereby an image formed as a result of the ink ejection is produced on a medium; and (b) a controller operable to supply a control signal to each actuator, and incorporating a drive pulse train into the control signal for causing ejection of at least two cooperative ink droplets that cooperate to form one dot of the image. The drive pulse train includes at least two drive pulses. One of the at least two drive pulses has a first pulse width smaller than a maximizing value that maximizes an ejection velocity and a volume of each ink droplet to be ejected. Another one of the at least two drive pulses has a second pulse width larger than the maximizing value. Also disclosed a method of producing the image on the medium by using the ink droplet ejection device.

The invention discloses a rock burst fragment ejection speed predicting method based on releasable elastic strain energy. The method comprises the following steps: step 1, calculating elastic strain energy U1 of surrounding rock after excavating; step 2, calculating surrounding rock wing crack expansion energy consumption Ut and friction energy consumption Wf on a main crack surface; step 3, deducting energy consumption value Ud in a surrounding rock cracking process in surrounding rock strain energy density U1 to obtain releasable elastic strain energy Ue of the cracked surrounding rock, and calculating residual elastic energy Qe in a cracked area of the cracked surrounding rock under induction of excavating and unloading if assuming that tunnel excavating footage as Le; and step 4, converting the residual elastic energy Qe of the rock into rock fragment ejection kinetic energy E to obtain average ejection speed v of the rock burst fragments. Through the rock burst fragment ejection speed predicting method based on releasable elastic strain energy, the problem that the accuracy and the reliability of the existing stress model predicting method are difficult to grasp can be solved; the predicting accuracy of the rock burse fragment ejection speed in the excavating process of deeply buried tunnels is improved.

A method for manufacturing polycrystalline silicon with high quality by effectively preventing undesired shape such as giving an rough surface to silicon rods or an irregularity in diameter of the silicon rods. The method for manufacturing polycrystalline silicon includes: an initial stabilizing step of deposition wherein a velocity of ejecting the raw material gas from the gas ejection ports is gradually increased; the shaping step wherein first the ejection velocity is increased at a rate higher than that in the stabilizing step and then the ejection velocity is gradually increased at a rate lower than the previous increasing rate; and a growing step wherein, after the shaping step, the ejection velocity is made slower than that at the end of the shaping step until the end of the deposition.

The invention relates to production equipment for steam explosion treatment of micropore structure substances, and the equipment is key treatment equipment of biomass utilization, biochemical engineering, fermentation brewing, solid waste treatment and other industries. The invention provides an instantaneous ejection type steam explosion machine utilizing the steam ejection principle to complete the steam explosion process. Opening of an explosion channel of the steam explosion machine utilizes the steam ejection pressure generated by section difference, thus overcoming the problem of prolonged deflation time along with treatment volume increase in traditional hot blow process. With the increase of the cylinder volume, the section difference also increases accordingly, so that the cylinder ejection velocity can maintain consistent, thus laying the foundation for process scale-up.

The invention discloses a magnetic probe array device and an electromagnetic ejection velocity measurement device and method. The magnetic probe array device comprises a plurality of magnetic probes, bottom plates fixedly connected with the magnetic probes respectively, and a skeleton fixation strip. The bottom plates and the skeleton fixation strip are provided with probe positioning holes for connecting the bottom plates and the skeleton fixation strip through screws; the skeleton fixation strip is provided with probe location holes corresponding to the magnetic probes respectively; after the bottom plates are connected with the skeleton fixation strip, induction coils of the magnetic probes pass through the probe location holes correspondingly; and the skeleton fixation strip has fixation strip positioning holes for enabling the skeleton fixation strip to be fixedly arranged to an electromagnetic ejection device through screws. The magnetic probe array device solves the problem of low measurement precision due to unstable external installation of the magnetic probes on the electromagnetic ejection device, and thus measurement precision is improved; and during repeated disassembly and assembly, positions and angles of the magnetic probes can be identical to those in the last time when the magnetic probes are reinstalled, and thus consistency of velocity measurement is improved.

The invention relates to the optimum design field of magnetic flux convertors, in particular to a magnetic flux convertor optimum design method based on a genetic algorithm and ANSYS simulation. The magnetic flux convertor optimum design method based on the genetic algorithm and the ANSYS simulation includes: selecting resistance, capacitance and drive voltage in a drive circuit of the magnetic flux convertor as main optimum parameters, and using the genetic algorithm in combination with the ANSYS simulation to perform optimum design of the drive circuit. The number of indexes for measuring motion performance of the magnetic flux convertor is two, and the two indexes are respectively final ejection velocity v of an ejector rod and execution time t of a whole tripping motion. The magnetic flux convertor optimum design method based on the genetic algorithm and the ANSYS simulation considers an actual tripping dynamic process of the magnetic flux convertor on the premise of optimizing design. The magnetic flux convertor optimum design method based on the genetic algorithm and the ANSYS simulation facilitates the optimum design of the magnetic flux convertor, and thereby raises the motion performance indexes of the magnetic flux convertor.

The present invention provides an aircraft carrier shipboard aircraft ejection block simulation training system. The system comprises an ejection runway, a block runway and a shipboard aircraft simulation training vehicle. The ejection runway and the block runway are straight-through runway with 200m; the ejection runway and the block runway are connected end to end; and a trainer can experience and share the real feeling of the ejection launch and the carrier landing block of the shipboard aircraft on an aircraft carrier with no need for getting on the aircraft carrier or driving the shipboard aircraft so as to obtain the limitation training of ejection acceleration overload and block carrier landing deceleration overload. The aircraft carrier shipboard aircraft ejection block simulation training system is simple in system structure, low in cost and high in energy use efficiency, is modularized and program controlled, regulated in ejection quality and ejection speed and convenient to process, install and train, and is a necessary device for military academy training and entertainment venues so as to increase the number of ejection modules or increase the power of the energy storage motor and an external power device; and moreover, the aircraft carrier shipboard aircraft ejection block simulation training system can be directly used for the ejection of the aircraft carrier shipboard aircraft, and the ejection block device in the system is the required device of the ejector and the blocker of the China aircraft carrier shipboard aircraft.