Proximity detection systems
    2.
    发明授权
    Proximity detection systems 失效
    接近检测系统

    公开(公告)号:US4976337A

    公开(公告)日:1990-12-11

    申请号:US312707

    申请日:1989-02-08

    申请人: John Trett

    发明人: John Trett

    摘要: An elevator car, supports a pair of sliding car doors which can be moved in synchronism towards or away from one another to close or open. An elongate detector strip is mounted on the outer face of respective car doors adjacent the leading edges thereof. A pair of opposing landing walls support respective ones of two sliding landing doors. The landing doors are synchronized to open and close with the car doors by control circuitry. The detector strips together define three separate regions in which detection of an obstruction can take place namely, a column like region extending across the leading edges of the car door and the landing door a column like region extending across the leading edges of the car door and the landing door, and a planar region extending vertically between the detector strips.

    摘要翻译: PCT No.PCT / GB88 / 00451 Sec。 371日期:1989年2月8日 102(e)日期1989年2月8日PCT Filed 1988年6月10日PCT Pub。 出版物WO88 / 09862 日期:1988年12月15日。一个电梯轿厢,支撑一对滑动车门,可以彼此同步移动或相互移动以关闭或打开。 细长的检测条被安装在相邻轿厢门的与其前缘相邻的外表面上。 一对相对的着陆壁支撑两个滑动着陆门中的相应的一个。 楼梯门同步,通过控制电路与轿厢门打开和关闭。 检测器条一起限定了三个分开的区域,其中可以发生障碍物的检测,即,跨越轿厢门的前缘延伸的柱状区域和层站门延伸穿过轿厢门的前缘的柱状区域,以及 层站门和在检测器条之间垂直延伸的平面区域。

    Photoelectric array detection circuitry with dual gating means
    4.
    发明授权
    Photoelectric array detection circuitry with dual gating means 失效
    光电阵列检测电路采用双重加热装置

    公开(公告)号:US5053616A

    公开(公告)日:1991-10-01

    申请号:US460900

    申请日:1990-02-09

    申请人: John Trett

    发明人: John Trett

    IPC分类号: G01V8/20 H03K17/78

    CPC分类号: G01V8/20

    摘要: Detection circuitry in which the range and signal to noise ratios are improved includes a plurality of light emitting diodes connected in series and a plurality of photodiodes. Each photodiode has its own separate detection circuit which is AC decoupled by capacitors. Summing circuitry is connected to sum the outputs of the detection circuits and the resultant signal is fed to an output device. The magnitude of the output signal is increased by a factor equal to the product of the number of light emitting diodes and the number of photodiodes, over the situation where only one diode of each type is used.

    摘要翻译: PCT No.PCT / GB89 / 00400 Sec。 371日期1990年2月9日 102(e)1990年2月9日PCT PCT 1989年4月17日提交PCT公布。 出版物WO90 / 01773 日期:1990年2月8日。其中改善范围和信噪比的检测电路包括串联连接的多个发光二极管和多个光电二极管。 每个光电二极管都有自己独立的检测电路,由电容器进行交流去耦。 连线电路用于对检测电路的输出进行求和并将结果信号馈送到输出装置。 在仅使用每种类型的一个二极管的情况下,输出信号的幅度增加等于发光二极管数量与光电二极管数量的乘积的因子。

    Signal compensation circuits
    6.
    发明授权
    Signal compensation circuits 失效
    信号补偿电路

    公开(公告)号:US4839605A

    公开(公告)日:1989-06-13

    申请号:US116719

    申请日:1987-09-25

    CPC分类号: H03K17/16 B66B13/26

    摘要: A detection system for a sliding lift or elevator door comprises at least two sensors for monitoring the door opening. The sensors are arranged to detect the presence of a moving irregular shape (e.g. human form) in the doorway to reverse the opening action of the door or, if already open, to prevent the door from closing. A signal compensation circuit is provided to process the output signals from the sensors in a sense to maintain the outputs equal under steady state conditions. This is achieved by using the output of a first sensor as a reference signal. A comparator compares the output of a second sensor with a reference signal and through a feedback loop modifies the output of the said second sensor in a sense to equal the output of the first sensor. The feedback loop contains a delay circuit which is switchable between a long and a short delay. For slow changes in the output of the second sensor the long delay is effective but for first changes the delay circuit is switched to provide a short delay. The compensation circuit is effectively desensitized against errors due to drift and other slowly varying influences.

    摘要翻译: PCT No.PCT / GB87 / 00080 Sec。 371日期1987年9月25日第 102(e)1987年9月25日PCT PCT 1987年2月4日PCT公布。 出版物WO87 / 04691 日期1987年8月13日。用于滑动升降机或电梯门的检测系统包括用于监控门开口的至少两个传感器。 传感器布置成检测门口中存在移动的不规则形状(例如人形)以逆转门的打开动作,或者如果已经打开,则防止门关闭。 提供信号补偿电路以在某种意义上处理来自传感器的输出信号,以在稳态条件下维持输出相等。 这是通过使用第一传感器的输出作为参考信号来实现的。 比较器将第二传感器的输出与参考信号进行比较,并且通过反馈回路在一定程度上修改所述第二传感器的输出以等于第一传感器的输出。 反馈回路包含延迟电路,可在长时间和短时间之间切换。 对于第二传感器的输出缓慢变化,长延迟有效,但是对于第一次改变,延迟电路被切换以提供短的延迟。 补偿电路由于漂移和其他缓慢变化的影响而导致的误差有效地脱敏。