用于击键特征识别的压力感应键盘设计  

A Design of Pressure Sensing Keyboard for Keystroke Biometrics

作　　者：张世雷[1] 卜巍[1,2] 邬向前[1] 王宽全[1] ZHANG Shilei, BU Wei, WU Xiangqian, WANG Kuanquan （1 School of Computer Science ＆ Technology, Harbin Institute of Technology, Harbin 150001, China; 2 Department of Media Technology and Art, Harbin Institute of Technology, Harhin 150001, China）

机构地区：[1]哈尔滨工业大学计算机科学与技术学院,哈尔滨150001 [2]哈尔滨工业大学媒体技术与艺术系,哈尔滨150001

出　　处：《智能计算机与应用》2011年第1X期55-58,共4页Intelligent Computer and Applications

基　　金：基金项目：国家自然科学基金项目（60873140、61073125）,教育部新世纪优秀人才支持计划项目（NCET-08-0155）,霍英东教育基金项目（122035）.

摘　　要：介绍了一种应用于击键特征识别系统的压力感应键盘的设计。设计的目的是测量用户击键时手指施加的压力并将数据保存，用于生物特征识别系统。本设计中，将压力转换为电信号的压力感应元件是基于应变片设计的。其后还介绍了接口电路的设计，此接口电路负责处理代表压力大小的电信号以及与计算机通信。基于此设备的数据采集软件系统的设计也随后给出。从使用本设备采集的实验数据可以看出，本设计具有高精度与高速度等优点。A pressure sensing keyboard designed for keystroke biometrics system is proposed in this paper. The device is designed to measure the finger-ap- plied pressure during typing and the collected pressure data is used in biometrics recognition. In this device, a pressure sensing component is implemented by us- hag strain gage. This strain-gage-based pressure sensor is applied to transform pressure into electric signal. After that, an interface circuit is designed to process the electric signal and transmit it to PC. A software system is also designed to collect data in the following. Data collected using the proposed system shows that the device has the advantages of high accuracy and high speed.

关 键 词：压力感应 键盘 击键特征 生物测定学 应变片 

分 类 号：TP368.2[自动化与计算机技术—计算机系统结构;自动化与计算机技术—计算机科学与技术]