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174 条记录 (耗时 0.013 秒)

    Ultrasonic flow measuring method and apparatus thereof
    21.
    发明授权
    Ultrasonic flow measuring method and apparatus thereof 失效
    超声流量测量方法及其装置

    公开(公告)号：US5531124A

    公开(公告)日：1996-07-02

    申请号：US295287

    申请日：1994-08-24

    申请人： Soo D. Kim ,  Hak S. Chang ,  Jong S. Paik

    发明人： Soo D. Kim ,  Hak S. Chang ,  Jong S. Paik

    IPC分类号： G01F1/66 ,  G01H3/00 ,  G01H5/00 ,  G01P5/24 ,  G01P11/00

    CPC分类号： G01H3/00 ,  G01F1/662 ,  G01F1/667 ,  G01F1/668 ,  G01H5/00 ,  G01P11/00 ,  G01P5/245

    摘要： An ultrasonic flow measuring method and apparatus thereof comprises a plurality of ultrasonic vibrator apparatus mounted around the peripheral edge of a large caliber pipe at predetermined intervals, in which the ultrasonic vibrator apparatus are disposed at intervals of l=2R/(n+1) on one side radius R and at intervals of l'=R/(n+1)on the opposite side radius as well as operated in an alternating sequential arrangement in order to avoid the interference with one another, the ultrasonic vibrator apparatus are mounted on the outer wall of the pipe by being inserted into a hole of the pipe wall at a predetermined angle to the center line of the pipe, and the ultrasonic vibrator apparatus comprises a body inserted into the pipe wall; a first chamber constituted as a part of the body, for receiving an ultrasonic vibrator; and a second chamber constituted as a part of the body, for receiving a block having an acoustic resistance identical to that of the liquid flowing in the large caliber pipe to be measured, in which the ultrasonic vibrator and the block are integrated with each other, and the block is fitted into the body or supported in the body by means of a supporter, the upper surface of which is flush with the inner surface of the pipe.The ultrasonic flow measuring apparatus comprises an ultrasonic flow measuring circuit, which enables the delay time and the actual propagation distance of the ultrasonic pulses in the liquid to be precisely measured and corrected, if necessary.

    摘要翻译： 一种超声波流量测量方法及其装置，包括以规定的间隔安装在大口径管的周缘周围的多个超声波振动器装置，其中超声波振动器装置以1 = 2R /（n + 1）的间隔设置在 一侧半径R，并且在相对侧半径上以1'= R /（n + 1）的间隔，并且以交替的顺序布置操作，以避免彼此的干扰，超声波振动器装置安装在 通过以与管道的中心线成预定角度插入管壁的孔中的管的外壁，并且超声波振动器装置包括插入到管壁中的主体; 构成身体的一部分的第一室，用于接收超声波振动器; 以及第二室，其构成为所述主体的一部分，用于接收具有与所述超声波振动器和所述块彼此一体化的待测量的大口径管中流动的液体的声阻相同的声阻的块， 并且该块通过支撑件装配到主体中或支撑在主体中，支撑件的上表面与管的内表面齐平。 超声波流量测量装置包括超声波流量测量电路，如果需要，能够精确地测量和校正液体中的超声波脉冲的延迟时间和实际传播距离。

    Single inductive sensor vehicle detection and speed measurement
    22.
    发明授权
    Single inductive sensor vehicle detection and speed measurement 失效
    单感应传感器车辆检测和速度测量

    公开(公告)号：US5278555A

    公开(公告)日：1994-01-11

    申请号：US716649

    申请日：1991-06-17

    申请人： Earl B. Hoekman

    发明人： Earl B. Hoekman

    IPC分类号： G01P11/00 ,  G01V3/10 ,  G08G1/01 ,  G08G1/015 ,  G08G1/017 ,  G08G1/042 ,  G08G1/052

    CPC分类号： G08G1/015 ,  G08G1/042 ,  G08G1/052

    摘要： A determination is made whether a minimum threshold period (or frequency) change has occurred in an oscillator signal indicating the initial presence of a vehicle over an inductive sensor. The change in period of the oscillator signal is measured over each of a plurality of frame segments. A magnitude of period change in the oscillator signal is recorded. If the number of frame segments that occur between detection of the threshold change in period and the magnitude change in period is less than a predetermined number, the detector does not make a speed measurement calculation. If the number of frame segments equals or exceeds the predetermined number, the time rate of change of the period of the oscillator signal is estimated. A vehicle detector calculates a sensor entry distance for a particular vehicle. A vehicle entry time is calculated by dividing the magnitude of period change by the rate of period change. Speed is then calculated by dividing the entry distance by the vehicle entry time. The speed measurement is directed to an output by activating the output for a period of time proportional to the speed of the vehicle. Multiple vehicles may be detected by adjusting the minimum threshold period change, after each vehicle passes, by the peak change in oscillator signal period caused by that vehicle. Vehicle length may be calculated by multiplying the measured speed by the total time between vehicle entry and exit from the loop area, and subtracting the length of the detection area.

    摘要翻译： 确定在表示车辆在电感式传感器上的初始存在的振荡器信号中是否发生了最小阈值周期（或频率）变化。 在多个帧段中的每一个上测量振荡器信号的周期的变化。 记录振荡器信号的周期变化幅度。 如果在周期的阈值变化的检测与期间的幅度变化之间发生的帧段的数量少于预定数量，则检测器不进行速度测量计算。 如果帧段的数量等于或超过预定数量，则估计振荡器信号周期的时间变化率。 车辆检测器计算特定车辆的传感器进入距离。 通过将周期变化的幅度除以周期变化率来计算车辆进入时间。 然后通过将入口距离除以车辆进入时间来计算速度。 通过将输出激活与车辆的速度成比例的一段时间，将速度测量指向输出。 可以通过在车辆通过之后通过由该车辆引起的振荡器信号周期的峰值变化来调整最小阈值周期变化来检测多个车辆。 车辆长度可以通过将测量的速度乘以车辆进入和退出循环区域之间的总时间，并减去检测区域的长度来计算。

    Approximated rotational speed signal for shifting transmission
    23.
    发明授权
    Approximated rotational speed signal for shifting transmission 失效
    用于换档传动的近似转速信号

    公开(公告)号：US4959806A

    公开(公告)日：1990-09-25

    申请号：US261448

    申请日：1988-10-24

    申请人： Gary L. Gold

    发明人： Gary L. Gold

    IPC分类号： G01P3/44 ,  G01P11/00

    CPC分类号： G01P11/00

    摘要： A system is provided for approximating rotational speed of a oscillating rotational member such as a vehicular transmission input or output shaft (2). The system includes a rotational speed sensor (4) and a processor (6) operable to provide at an output signal (S.sub.approx.) equal to at least one of signals (S.sub.3, S'.sub.3, S.sub.5, S'.sub.5 and S.sub.7 S'.sub.7) according to the number of speed measurements made by sensor (4) within a predetermined time period (T).

    Navigation instrument for roadway vehicles
    24.
    发明授权
    Navigation instrument for roadway vehicles 失效
    道路车辆导航仪

    公开(公告)号：US4216530A

    公开(公告)日：1980-08-05

    申请号：US973903

    申请日：1978-12-28

    申请人： Kiyoshi Yamaki ,  Masanori Mizote ,  Takashi Oka ,  Hideoki Matsuoka ,  Hiroyuki Nomura ,  Takaaki Mogi ,  Akitoshi Mimura

    发明人： Kiyoshi Yamaki ,  Masanori Mizote ,  Takashi Oka ,  Hideoki Matsuoka ,  Hiroyuki Nomura ,  Takaaki Mogi ,  Akitoshi Mimura

    IPC分类号： G01P3/66 ,  G01P11/00 ,  G01P3/56 ,  G01C23/00

    CPC分类号： G01P3/66 ,  G01P11/00

    摘要： A navigation instrument for roadway vehicles comprises a first counter for counting pulses each occurring in response to the vehicle moving a predetermined distance to detect the distance travelled from the starting point of a trip, a second counter for counting clock pulses to detect the time elapsed from the start of the vehicle. A microcomputer or digital circuitry is provided to compute on the data received from the first and second counters to derive an output data representative of the average speed of the vehicle over the distance so far travelled and to compare the computed average speed with a desired speed to detect the deviation of the actual average speed from the reference. A comparator is provided to detect when this deviation exceeds a predetermined value to generate a warning signal to alert the vehicle driver to correct the vehicle speed.

    摘要翻译： 用于道路车辆的导航仪器包括：第一计数器，用于计数响应于车辆移动预定距离而发生的脉冲，以检测从行程起点移动的距离;第二计数器，用于计数时钟脉冲，以检测从 车的开始。 提供微型计算机或数字电路以对从第一和第二计数器接收的数据进行计算，以导出表示车辆在迄今所行驶的距离上的平均速度的输出数据，并将所计算出的平均速度与期望速度进行比较 检测实际平均速度与参考值的偏差。 提供比较器以检测该偏差何时超过预定值，以产生警告信号以警告车辆驾驶员校正车速。