http://hdl.handle.net/10397/1968 Search the Channel search http://repository.lib.polyu.edu.hk/jspui/simple-search http://hdl.handle.net/10397/5234 Title: Personal tracking device with low power consumption<br/><br/>Authors: Chow, Martin H. L.; Chung, Ching-ching Jenny; Lai, Kam-yuk Claudia; Lee, Hor-yau Carrie; Ma, Kam Wah; Mak, Diana P. S.; Wai, Ping-kong Alexander; Mak, Arthur F. T.; You, Jane; Tong, Kai-yu Raymond; Zheng, Yong-Ping<br/><br/>Abstract: An portable tracking device integrating a mobile phone module (e.g. based on GSM or 3G networks), a GPS module, a radio Beacon and ultrasonic beacon. The tracking device is normally in a hibernated state when the entire device consumes little energy and require no periodically changing or recharging batteries to power the device. It consumes power from the primary battery only when a tracking process is actually taken place. With this portable tracking device on the person who is unable to affirmatively report his or her whereabout, the remote center and/or a search team can communicate the GPS module, radio beacon and ultrasonic beacon of the tracking device via the mobile phone module based on existing wireless communication technologies, such SMS, GPRS, ect, on GSM or 3 G networks, which also serves as a means of initial rough estimation of the tracking device's location. Tue, 05 Jun 2012 00:00:00 GMT http://hdl.handle.net/10397/2016 Title: Distachable platform = 可拆卸平台<br/><br/>Authors: Chan, Albert P. C. (陳炳泉); Wong, Francis K. W. (黃君華); Yam, Chi-ho Michael (任志浩); Guo, Yongqiang (郭永强); Chan, Daniel W. M. (陳煒明); Lam, W. M. Edmond (林偉明); Cheung, Esther (張泳沁)<br/><br/>Abstract: The invention is a fast removable platform, comprising: supporting framework unit having a pair of supporting frameworks and a pair of inner wall fixing components and comprising inner beam, outer beam, hanging beam fixed between the inner and outer beams, and install piece arranged on the outer beam, where the inner, outer and hanging beams form an inverted U shape, the inner wall fixing component comprises vertical beam and fastener, as assembling, the inner wall fixing component is fixed on the inner wall of a counterfort, the supporting framework is arranged on the counterfort along the two sides of the window frame and the inner beam is inserted in the vertical beam, the outer beam is butted against the outer wall of the counterfort by the fastener of the inner wall fixing component; support unit, having a pair of support frames and hanging fastening piece and railing support piece and hanging on the install piece through the hanging fastening piece to form two extended support arms; platform plate unit spread horizontally on the support arms; railing unit fixed on the railing support piece; and backplate unit arranged inside the railing unit.; 一种可拆卸平台，包括：支撑框架单元，其具有一对支撑框架及一对内壁固定组件，支撑框架包括内梁、外梁、固定连接在内梁和外梁之间的挂梁和设置在外梁上的安装件，该内梁、外梁和挂梁形成为倒U形，内壁固定组件包括纵梁及紧固件，组装时内壁固定组件固定到护墙内壁上，支撑框架沿着窗框的两侧架设于护墙上，并使内梁插入到纵梁内，通过内壁固定组件的紧固件将外梁顶抵于护墙的外壁上；支承单元，具有一对支承架、及设置于支承架上的挂接卡合件和栏杆支撑件，支承架通过挂接卡合件挂接在支撑框架的安装件上以形成伸出的两支承臂；平台板单元，其平铺在支承臂上；栏杆单元，其固定到栏杆支撑件上；以及护板单元，其设置在该栏杆单元的内侧。 Wed, 06 Jan 2010 00:00:00 GMT