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    • 8. 发明授权
    • Validator for electrocardial data processing system
    • US4417254A
    • 1983-11-22
    • US371783
    • 1982-04-26
    • Donald C. Woods
    • Donald C. Woods
    • G01D9/08G01D9/28G06F17/00G01D9/26
    • A61B5/0432G01D9/08G01D9/285
    • Apparatus for printing alpha-numeric characters for plotting an incoming signal at rates on the order of one page every seven seconds for rapidly verifying that the system producing the incoming signal is operating properly. Both printing and plotting are done by styli mounted on a moving carriage and individually electrified to produce marks on a specially prepared paper. The styli are moved back and forth across the paper, marking in both directions. The carriage is not stepped across the page, but instead is moved smoothly from one side to the other side under control of a velocity servo. A controller generates and applies velocity command inputs to the servo, based on the position of the carriage as sensed by an optical encoder, and based on certain characteristics of the incoming signal. A first buffer memory accumulates the incoming signal until a line has been stored for plotting, while a second buffer memory is applying its accumulated contents to the printhead. Thereafter, the first memory supplies the printhead while the second memory accumulates. The apparatus includes a versatile formatting system which determines the amount of data to be plotted in each line in accordance with the incoming timing signals associated with the data. If the timing signals are not present, the apparatus makes the determination autonomously.
    • 9. 发明授权
    • Continuous plotter
    • 连续绘图仪
    • US4039127A
    • 1977-08-02
    • US656510
    • 1976-02-09
    • Donald F. HuffhinesJ. S. JonesClarence G. Smith
    • Donald F. HuffhinesJ. S. JonesClarence G. Smith
    • G01D9/26G01D15/14G01D15/24
    • G01D9/26G01D15/14G01D15/24
    • An apparatus for plotting information, e.g., seismic data, onto a continuous sheet of a recording medium, e.g., photographic film. The film travels from a supply reel, over an advance roller, across a flat exposure surface, and onto a takeup roller. Torque motors apply equal but opposite torques to the supply reel and the takeup reel to maintain the film in tension to insure that the film will lie flat on the exposure surface during the plotting operation. A stepping motor rotates advance roller to move the film a precise amount across the exposure surface at desired times during the plotting operation. A camera, e.g., cathode ray tube, which receives data and projects it onto the film on the exposure surface, is mounted on a carriage which is swept back and forth across the exposure surface by means of a lead screw driven by a precision stepping motor. Control circuitry means is provided which not only drives the stepping motor and, hence, the carriage at a constant, defined speed during the plotting portion of a sweep but also provides for the proper acceleration and deceleration of the motor during each sweep of the carriage.
    • 用于将信息(例如,地震数据)绘制到记录介质的连续片材上的设备,例如摄影胶片。 胶片从供应卷轴上行进,超过推进辊,穿过平坦的曝光表面,并且到卷绕辊上。 扭矩电机对供应卷轴和卷取卷轴施加相等但相反的扭矩,以保持胶片处于张力状态,以确保胶片在绘图操作期间平放在曝光表面上。 在绘图操作期间,步进电机旋转提前滚轮以在期望的时间将胶片精确地移动到曝光表面上。 将接收数据并将其投影到曝光表面上的胶片上的照相机,例如阴极射线管,安装在通过由精密步进电机驱动的导螺杆而在曝光表面上来回扫过的托架上 。 提供了控制电路装置,其不仅在扫描的绘制部分期间以恒定的限定速度驱动步进电机,并且因此驱动滑架,而且还在滑架的每次扫掠期间提供电动机的适当的加速和减速。