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    • 43. 发明申请
    • MULTI-POINT VIDEO CONFERENCE SYSTEM AND MEDIA PROCESSING METHOD THEREOF
    • 多点视频会议系统及其媒体处理方法
    • US20070273755A1
    • 2007-11-29
    • US11830057
    • 2007-07-30
    • Yong YangChun YangYilin CaoKun DingMingshi HuangXiaodong Gong
    • Yong YangChun YangYilin CaoKun DingMingshi HuangXiaodong Gong
    • H04N7/14
    • H04M3/567H04L12/1822H04L29/06027H04L65/1006H04L65/4046H04M2203/5054H04N7/152
    • This invention discloses a multi-point video conference system and the media processing method thereof. The multi-point video conference system includes a softswitch, an application server and terminals. The softswitch is responsible for protocol adaptation and calling process, and performing the interconnection with other systems as an external interface of the conference system. The application server is responsible for service logic control and charging. The characteristic of this invention lies in that: the terminals behaved as conference participants including a conference chairman and ordinary conference members. Any terminal registered on the softswitch could be a conference member, and the conference chairman must be a SIP soft terminal with video conference service capability in order to realize the media control. The invention realizes the media control on the basis of the soft terminal behaved as the conference chairman, therefore any terminal user that has registered on the softswitch can initiate or participate a multi-point video conference, and the participant terminal number of the video conference is not limited.
    • 本发明公开了一种多点视频会议系统及其媒体处理方法。 多点视频会议系统包括软交换,应用服务器和终端。 软交换机负责协议适配和呼叫过程,并与其他系统进行互联,作为会议系统的外部接口。 应用服务器负责业务逻辑控制和计费。 本发明的特征在于:终端作为会议参与者,包括会议主席和普通会议成员。 注册在软交换机上的任何终端可以是会议成员,会议主席必须是具有视频会议服务能力的SIP软终端,以实现媒体控制。 本发明基于作为会议主席的软终端实现媒体控制,因此在软交换机上注册的任何终端用户可以发起或参与多点视频会议,并且视频会议的参与者终端号码是 不限于
    • 50. 发明授权
    • Serially-connected ball screw pair and piezoelectric actuator macro-micro driving and guiding device
    • 串联滚珠丝杠对和压电执行机构宏微驱动引导装置
    • US09366327B2
    • 2016-06-14
    • US14001896
    • 2011-10-26
    • Yumei HuangHongyan LiuXingang YangYong Yang
    • Yumei HuangHongyan LiuXingang YangYong Yang
    • F16H25/22B23Q1/30B23Q5/40
    • F16H25/2204B23Q1/30B23Q5/40Y10T74/18656
    • A serially-connected ball screw pair and piezoelectric actuator macro-micro driving and guiding device includes, from the bottom to the top, a sliding seat (1), a ball screw pair, a sliding table guide rail pairs, a nut seat (6), a piezoelectric actuator (7), a micro-moving table, a nut seat guide rail pairs and a sliding table (1). The axis of a ball screw is symmetric with respect to two sliding table rail pairs, a nut (3) of the ball screw pair is fixedly mounted into the nut seat (6), one end of the piezoelectric actuator (7) is fixedly connected with the nut seat (6) and the other end thereof is fixedly connected with the micro-moving table (8), the axis of the piezoelectric actuator is symmetric relative to two sliding table rail pairs, an upper surface of the micro-moving table is fixedly mounted to a lower surface of the sliding table, and two nut rail pairs are symmetric relative to the axis of the ball screw. The ultra precision feeding in a long stroke within a full journey can be achieved; and the piezoelectric actuator only endures the driving force without enduring the driving torque generated by the driving force of the ball screw pair, thus, so that the piezoelectric actuator is in a good stressed status, which is applicable to a large-load ultra-precision feed system.
    • 一个串联连接的滚珠丝杠对和压电执行器宏观微型驱动和引导装置,包括从底部到顶部的滑动座(1),滚珠丝杠对,滑动台导轨对,螺母座(6 ),压电致动器(7),微移动台,螺母座导轨对和滑动台(1)。 滚珠丝杠的轴线相对于两个滑动台轨对对称,滚珠丝杠对的螺母(3)固定地安装在螺母座(6)中,压电致动器(7)的一端固定连接 与螺母座(6)的另一端与微动台(8)固定连接,压电致动器的轴线相对于两个滑台轨对,微动台的上表面对称 固定地安装在滑动台的下表面,两个螺母导轨对相对于滚珠丝杠的轴线对称。 可以在全程内实现长时间的超精密进给; 并且压电致动器仅承受驱动力而不会承受由滚珠丝杠对的驱动力产生的驱动力矩,使得压电致动器处于良好的应力状态,这适用于大负载超精度 饲料系统