公开(公告)号：US20080291091A1

公开(公告)日：2008-11-27

申请号：US11752766

申请日：2007-05-23

Applicant: Jia-Hung Su ,  Ching-Chi Lin ,  Hung-Jen Chen ,  Kai Shih ,  Yu-Yuan Wu

Inventor： Jia-Hung Su ,  Ching-Chi Lin ,  Hung-Jen Chen ,  Kai Shih ,  Yu-Yuan Wu

IPC: H01Q1/38

CPC classification number: H01Q9/42 ,  H01Q5/371 ,  H01Q5/378

Abstract: A dual band antenna has a ground portion, a first radiating conductor spaced from one side of the ground portion, a second radiating conductor connected between one end of the first radiating conductor and the ground portion, a third radiating conductor connected on the other end of the first radiating conductor, a fourth radiating conductor extended from the third radiating conductor, a parasitic element arranged to close to the second radiating conductor and connected to the ground portion and a feeding cable connected to the free end of the third radiating conductor. When the dual band antenna operates, the first, second and third radiating conductors obtain a first wireless location area network bandwidth covering 2.4 GHz to 2.5 GHz, and the third radiating conductor, the fourth radiating conductor and the parasitic element obtain a second wireless location area network bandwidth covering 4.9 GHz to 5.87 GHz.

Abstract translation: 双频带天线具有接地部分，与接地部分的一侧隔开的第一辐射导体，连接在第一辐射导体的一端和接地部分之间的第二辐射导体，连接在第一辐射导体的另一端的第三辐射导体 所述第一辐射导体，从所述第三辐射导体延伸的第四辐射导体，布置成靠近所述第二辐射导体并连接到所述接地部分的寄生元件，以及连接到所述第三辐射导体的自由端的馈电电缆。 当双频带天线工作时，第一，第二和第三辐射导体获得覆盖2.4GHz至2.5GHz的第一无线定位区域网络带宽，并且第三辐射导体，第四辐射导体和寄生元件获得第二无线位置区域 网络带宽覆盖4.9 GHz至5.87 GHz。

公开(公告)号：US06621915B1

公开(公告)日：2003-09-16

申请号：US09515212

申请日：2000-02-29

Applicant: Hung-Jen Chen ,  Hsin-Chung Lien ,  Chih-Hua Liu ,  Ding-Kuo Huang

Inventor： Hung-Jen Chen ,  Hsin-Chung Lien ,  Chih-Hua Liu ,  Ding-Kuo Huang

IPC: G06K9100

CPC classification number: G01N21/8983 ,  G06T7/0004 ,  G06T2207/30124

Abstract: The present invention disclosed a method and system inspecting cotton web homogeneity by a digital image processing technique, in particular, for an on-line cotton web homogeneity test. It uses optical principles in conjunction with a charge coupled device type camera to find a theoretical equation indicating the correlation between the transmittance of cotton webs and basic weights (weights per unit area). Next, the invention makes use of a numerical analysis method to find the optimal approximation equation representing a relationship between measured transmittance and basic weights of cotton webs. When executing an on-line inspection, a system according to the invention detects the transmittance of cotton webs by means of the computer controlled visual device and then calculates correlated data of cotton web homogeneity variations according to the approximation equation acquired previously. Besides, the system can monitor production operation and detect any abnormal conditions or periodical variations in production through a quick Fourier transformation of homogeneity variations. The invention can be applied to on-line web homogeneity tests either for cotton webs or for other materials like paper or non-woven fabric.

Abstract translation: 本发明公开了一种方法和系统，通过数字图像处理技术，特别是用于在线棉花网均匀性测试来检查棉花网均匀性。 它结合电荷耦合器件类型的相机使用光学原理来找到指示棉幅的透射率与基重（相对于每单位面积的重量）之间的相关性的理论公式。 接下来，本发明利用数值分析方法来找到表示棉幅的测量透射率和基重之间的关系的最佳近似方程。 当执行在线检查时，根据本发明的系统通过计算机控制的视觉设备检测棉幅的透射率，然后根据先前获得的近似方程计算棉花网均匀性变化的相关数据。 此外，系统可以通过快速傅里叶变换均匀性变化来监控生产操作并检测生产中的任何异常情况或周期性变化。 本发明可以应用于棉网或用于其它材料如纸或无纺织物的在线网均匀性测试。