公开(公告)号：US6015449A

公开(公告)日：2000-01-18

申请号：US22631

申请日：1998-02-12

申请人： Koichi Hirota ,  Kohki Ohara ,  Kazuyoshi Mori

发明人： Koichi Hirota ,  Kohki Ohara ,  Kazuyoshi Mori

IPC分类号： G01N29/00 ,  B60S1/08 ,  G01N29/04 ,  G01N29/22 ,  G01W1/14 ,  G01N29/20 ,  B06B3/02

CPC分类号： B60S1/0822 ,  B60S1/0855 ,  G01N29/041 ,  G01N29/22 ,  G01N2291/015 ,  G01N2291/02827 ,  G01N2291/02845 ,  G01N2291/0427 ,  G01N2291/044 ,  Y10S318/02

摘要： A rain drop detecting device includes an oscillation element disposed on a plate member such as a windshield for generating an ultrasonic wave on the plate member, an ultrasonic wave receiving element disposed on the plate member for receiving the ultrasonic wave generated by the oscillation element, a detecting device connected to the ultrasonic wave receiving element for detecting an amplitude of the ultrasonic wave, and an ultrasonic wave absorbing member disposed on the plate member. The absorbing member is designed to absorb a portion of the ultrasonic wave generated by the oscillation element to prevent the downwardly travelling portion of the ultrasonic wave from travelling beyond a desired region of the plate member. In the case of a windshield, the absorbing member can be used to prevent the ultrasonic wave from travelling to the resting location of the wiper so that inadvertent rain drop detection does not occur.

摘要翻译： 雨滴检测装置包括设置在诸如挡风玻璃的板构件上的用于在板构件上产生超声波的振动元件，设置在板构件上用于接收由振荡元件产生的超声波的超声波接收元件， 连接到超声波接收元件的检测装置，用于检测超声波的振幅;以及超声波吸收部件，设置在该板部件上。 吸收构件被设计成吸收由振动元件产生的超声波的一部分，以防止超声波的向下行进部分行进超过板构件的期望区域。 在挡风玻璃的情况下，吸收构件可以用于防止超声波行进到擦拭器的静止位置，从而不会发生无意的雨滴检测。

公开(公告)号：US06462504B2

公开(公告)日：2002-10-08

申请号：US09819611

申请日：2001-03-29

申请人： Chiaki Honma ,  Masanori Sugiyama ,  Daisuke Yamada ,  Shinichiroh Iwasaki ,  Kohki Ohara

发明人： Chiaki Honma ,  Masanori Sugiyama ,  Daisuke Yamada ,  Shinichiroh Iwasaki ,  Kohki Ohara

IPC分类号： H02P146

CPC分类号： H02P25/0925

摘要： An energization control device is provided to prevent rapid decrease of current which is flowing through each of phase coils of an electric motor. A time duration is divided into three stages which ranges from an initiation of the current supply to the phase coil to a termination of the current supply to the phase coil. At the first stage, the second stage, and the third stage, soft/hard chopping energization control, 0-volt energization, and duty chopping energization control, respectively, are made. Energizing the phase coil is made by way of a first switching element and a second switching element. At the first stage, depending on an actual current value being in excess of a target current value, either of or both of the first switching element and the second element are made OFF. At the second stage, while the second switching element is being made OFF, the second switching element is made ON. At third stage, while the second switching element is being made OFF, the first switching element is, at a duty cycle, made ON and OFF alternately in repetition.

摘要翻译： 提供通电控制装置，以防止流过电动机的各相线圈的电流的快速下降。 持续时间被分为三个阶段，其范围从电流供应到相位线圈的启动到终止到相线圈的电流供应。 在第一阶段，第二阶段和第三阶段，分别进行软/硬斩波通电控制，0伏通电和占空斩波通电控制。 通过第一开关元件和第二开关元件来激励相线圈。 在第一阶段，根据实际的电流值超过目标电流值，使第一开关元件和第二元件中的任一个或两者成为OFF。 在第二阶段，当第二开关元件关闭时，第二开关元件导通。 在第三阶段，当第二开关元件断开时，第一开关元件以占空比重复地交替地进行ON和OFF。