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    • 1. 发明授权
    • Backup proximity sensor for a vehicle
    • 备用车辆接近传感器
    • US6044632A
    • 2000-04-04
    • US18873
    • 1998-02-05
    • Steven C. SchmalzRussell P. SchuchmannJoseph C. Zuercher
    • Steven C. SchmalzRussell P. SchuchmannJoseph C. Zuercher
    • A01D69/00A01D75/20B60R21/00G01J1/02G01V8/12G05D1/02E21B34/64B60Q1/00
    • G05D1/0242G05D1/0272
    • A backup proximity sensor for a vehicle includes a first passive infrared sensor (PIR) and a second PIR vertically mounted with respect to one another on a pivotal support member. The first PIR and second PIR are angularly directed such that the respective fields of view converge, establishing a detection zone in a region behind a vehicle. A drive motor and scanning gear box are coupled to the pivotal support member and pivotally drive the first and second PIR in an oscillatory fashion about a predetermined arc. This establishes relative motion between the PIRs and a stationary warm body in the field of view of the two sensors, allowing the stationary body to be detected. A detection circuit receives output signals from the first PIR and second PIR and generates an output signal indicative of a warm body being detected by both the first and second PIRs. This eliminates false alarms generated by warm bodies outside the region of the desired detection zone.
    • 用于车辆的备用接近传感器包括在枢转支撑构件上相对于彼此垂直安装的第一被动红外传感器(PIR)和第二PIR。 第一PIR和第二PIR被成角度地定向,使得各个视场会聚,在车辆后面的区域中建立检测区域。 驱动电动机和扫描齿轮箱联接到枢转支撑构件并以围绕预定弧的振荡方式枢转地驱动第一和第二PIR。 这在两个传感器的视场中建立了PIR和静止的暖身之间的相对运动,允许检测静止体。 检测电路接收来自第一PIR和第二PIR的输出信号,并产生指示由第一和第二PIR两者检测到的温暖体的输出信号。 这消除了在所需检测区域之外的温暖物体产生的假警报。
    • 2. 发明授权
    • Back-up proximity sensor for a vehicle
    • 备用车辆接近传感器
    • US6021373A
    • 2000-02-01
    • US217267
    • 1998-12-21
    • Joseph C. ZuercherRussell P. SchuchmannSteven C. Schmalz
    • Joseph C. ZuercherRussell P. SchuchmannSteven C. Schmalz
    • B60Q1/48B60Q1/00
    • B60Q9/006
    • A back-up proximity sensor for a vehicle is formed with an array of sensor pairs. Each sensor pair includes a lower passive infrared sensor (PIR) having a first field of view and an upper PIR having a second field of view. Each lower PIR and upper PIR is vertically mounted with respect to one another. The lower PIR and upper PIR of each sensor pair are angularly directed such that the respective fields of view intersect, thereby establishing a detection zone in a region behind a vehicle. The sensor pairs are arranged in a substantially adjacent, semicircular configuration to provide a continuous area of coverage behind a vehicle. A detection circuit receives output signals from each sensor pair and generates an output signal indicative of a warm body being detected by both the upper and lower sensors in a selected sensor pair, eliminating false alarms generated by warm bodies outside the region of the desired detection zone.
    • 用于车辆的备用接近传感器由传感器对阵列形成。 每个传感器对包括具有第一视野的下部无源红外传感器(PIR)和具有第二视场的上部PIR。 每个下部PIR和上部PIR相对于彼此垂直地安装。 每个传感器对的下部PIR和上部PIR成角度地定向,使得各个视场相交,从而在车辆后面的区域中建立检测区域。 传感器对布置成基本上相邻的半圆形构造,以在车辆后面提供连续的覆盖区域。 检测电路接收来自每个传感器对的输出信号,并且产生一个表示在所选择的传感器对中的上传感器和下传感器都检测到的温暖体的输出信号,消除了在所需检测区域之外的温暖物体产生的假警报 。
    • 3. 发明授权
    • Apparatus for envelope detection of low current arcs
    • 低电流弧包络检测装置
    • US5818237A
    • 1998-10-06
    • US661278
    • 1996-06-10
    • Joseph C. ZuercherRaymond W. MacKenzieSteven C. Schmalz
    • Joseph C. ZuercherRaymond W. MacKenzieSteven C. Schmalz
    • G01R31/02G01R31/12H02H1/00G01R31/08H02H3/00
    • H02H1/0015
    • Arcing faults in an ac current are detected by apparatus which is responsive to a predetermined randomness in step increases in the current to eliminate false tripping caused by regularly occurring discontinuities produced by loads such as dimmers. A signal conditioner generates a bandwidth limited di/dt signal having pulses produced by the step increases in current. In one embodiment, a first tracking circuit tracks the envelope of the di/dt signal with a first time constant. A second tracking circuit also tracks the di/dt envelope, but with a second, shorter time constant. An arcing fault is indicated if the second tracking signal falls to a predetermined fraction of the fist tracking signal. This circuit may be used alone to detect arcing faults or to increase the sensitivity to arcing faults over dimmers of a circuit which responds to a time attenuated integrated valve of the pulses in the di/dt signal. In another embodiment, the di/dt envelope signal is subtracted from the magnitude of the pulses before they are applied to the time attenuated integrator, but with the subtraction time delayed to preclude attenuation of the first pulse.
    • 交流电流中的电弧故障由对电流逐步增加的预定随机性响应的装置检测,以消除由诸如调光器的负载产生的常规发生的不连续性导致的错误跳闸。 信号调节器产生具有由电流阶梯增加产生的脉冲的带宽限制di / dt信号。 在一个实施例中,第一跟踪电路以第一时间常数跟踪di / dt信号的包络。 第二跟踪电路还跟踪di / dt包络,但是具有第二较短的时间常数。 如果第二跟踪信号下降到第一跟踪信号的预定分数,则指示电弧故障。 该电路可以单独使用以检测电弧故障,或者增加对电路的调光器的响应于di / dt信号中的脉冲的时间衰减集成阀的电弧故障的灵敏度。 在另一个实施例中,将di / dt包络信号从施加到时间衰减积分器之前的脉冲幅度中减去,但减法时间被延迟以排除第一脉冲的衰减。
    • 7. 发明授权
    • Apparatus for measuring depth of a fluid chamber
    • 用于测量流体室深度的装置
    • US4949584A
    • 1990-08-21
    • US350658
    • 1989-05-08
    • Robert W. LadeHerman P. SchuttenJoseph C. Zuercher
    • Robert W. LadeHerman P. SchuttenJoseph C. Zuercher
    • G01B17/00
    • G01B17/00
    • The depth of a cavity or chamber (10') is measured by using the chamber as the resonator of an electronic oscillator (24) whose oscillations are coupled to fluid in the cavity by transducers (12, 13). Both the variable-depth main chamber (10') and a reference chamber (117) of fixed depth are measured. Variations in the data obtained from the chambers are caused by factors affecting the velocity of propagation of sound in the fluid. An accurate measurement of the depth of the main chamber is obtained by compensating direct data (at 42) obtained from the main chamber (10'), using, data (at 43) obtained from the fixed-depth reference chamber (117). In one embodiment an inertance orifice (121) is utilized between the two chambers. The fluid inertance of the orifice, together with the compliance of the fluid in the main chamber (10'), form a resonant system whose anti-resonant frequency is a measure of the dimensions of the main chamber. (Inertance is the acoustical equivalent of inductance.)
    • 通过使用室作为电子振荡器(24)的谐振器来测量空腔或室(10')的深度,该振荡器的振荡通过换能器(12,13)耦合到空腔中的流体。 测量可变深度主室(10')和固定深度的参考室(117)。 从室获得的数据的变化是由影响流体中声音传播速度的因素引起的。 通过使用从固定深度参考室(117)获得的数据(在43)补偿从主室(10')获得的直接数据(在42℃)来获得主室深度的精确测量。 在一个实施例中,在两个室之间使用惯性孔(121)。 孔口的流体惯性以及主腔室(10')中流体的顺应性形成谐振系统,其反谐振频率是主腔室尺寸的量度。 (惯性是电感的声学等效值。