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    • 2. 发明授权
    • Method and apparatus for electronic leak testing
    • 电子泄漏测试方法和装置
    • US4587619A
    • 1986-05-06
    • US330384
    • 1981-12-14
    • Vernon G. Converse, IIIJames M. BordatoTheodore R. BottCharles E. Foerster, Jr.Desra N. Herbst, Jr.Ronald K. MudgeRichard L. SmithFrank R. Young
    • Vernon G. Converse, IIIJames M. BordatoTheodore R. BottCharles E. Foerster, Jr.Desra N. Herbst, Jr.Ronald K. MudgeRichard L. SmithFrank R. Young
    • G01M3/26G01M3/32G01M3/02G06F15/20
    • G01M3/3263
    • The specification discloses an electronic dynamic balance leak testing system utilizing a "live zero", wherein a source of test medium at a predetermined desired pressure or vacuum is connected to a part to be tested, and after the part is filled with the test medium, and an interval is provided for the system to stabilize the affects due to wave front oscillations, the test part is momentarily isolated from said test media and a microcomputer system is utilized, both to cause said isolation, and to measure the differential pressure existing at two points during the test. In a modification of our system which can dynamically project leak and accept or reject parts much sooner because of this projection feature, the rate of change of the differential pressure transducer is examined and is compared to a curve which is characteristic of the rate of change of a volume which is experiencing a predominately leak based change of pressure. When the rate of change is determined to be predominately a leak based change, the rate of change is determined to be a "Qualified Leak" or a qualified curve. In this case, after a predetermined sample time elapses from the point at which the curve was qualified, a reading of leakage is taken, such reading is then extrapolated to a full test time reading and compared to limits to see if a part is to be accepted or rejected.
    • 该说明书公开了一种利用“活零”的电子动平衡泄漏测试系统,其中将预定的所需压力或真空的测试介质源连接到待测试的部件,并且在部件填充有测试介质之后, 并且为系统提供间隔以稳定由于波前振荡引起的影响,测试部分与所述测试介质瞬时隔离,并且利用微机系统来进行所述隔离,并且测量存在于两个 测试期间积分 在我们的系统的修改中,由于这种投影特性,可以更快地动态地预测泄漏和接收或拒绝零件,差压变送器的变化率被检测并且与变化率的特征曲线进行比较 一个体积主要是基于泄漏的压力变化。 当变化率主要被确定为基于泄漏的变化时,变化率被确定为“合格泄漏”或合格曲线。 在这种情况下,在从曲线合格点经过预定的采样时间之后,进行泄漏读取,然后将这种读数外推到全部测试时间读数,并与限值进行比较,以查看零件是否为 接受或拒绝
    • 3. 发明授权
    • Weigh scale
    • 称重秤
    • US4492281A
    • 1985-01-08
    • US353171
    • 1982-03-01
    • Kent Van AllenJames M. Bordato
    • Kent Van AllenJames M. Bordato
    • G01G1/34G01G11/04G01G17/06G01G19/414G01G7/00G01G3/14G01G19/52
    • G01G19/414G01G1/34G01G11/046G01G17/06
    • The specification discloses an improved weigh scale of the dual beam type having large and small flow buckets adapted to receive a flow of fluid therein, and an encoder connected to a ball screw having a poise weigh driven by a drive motor for keeping the scale continually balanced while a fluid is being introduced into one of said flow buckets, and having a power supply circuit, a pulse encoder circuit, and a poise control circuit for operation thereof, the improvement including an improved poise control circuit having low gain with high integration for use during the run mode, but being switchable to a circuit having high gain and derivative action during the calibration mode.
    • 本说明书公开了一种具有适于接收流体流的大型和小型流动铲斗的双梁类型的改进的称重秤,以及连接到具有由驱动马达驱动的重量级的滚珠丝杠的编码器,用于保持刻度尺持续平衡 同时流体被引入到一个所述流动桶中,并且具有电源电路,脉冲编码器电路和用于操作它的平衡控制电路,改进包括具有低增益的改进的泊位控制电路,具有高集成度以供使用 在运行模式期间,但是在校准模式期间可切换到具有高增益和微分作用的电路。