| 张梦玉,王绪隆,张仲宁,李杰,杨京,梁 彬,程建春.一种新型的电脑键盘按键声信号采集方法*[J].,2020,39(3):445-452 |
| 一种新型的电脑键盘按键声信号采集方法* |
| A new method to detect the sound of computer keyboard |
| 投稿时间：2019-04-29 修订日期：2020-04-28 |
| 中文摘要: |
| 传统的键盘按键音信号采集方法是采用造价较高的静音马达以恒定的速度敲击键盘按键，通过传声器远距离采集键盘的按键音，该方法在自然环境下受环境噪音影响大，需在静音房中进行，因此很难在工业上大规模使用。本文提出了一种新型的键盘按键音信号采集方法，首先采用模拟信号驱动电磁铁模拟手指敲击键盘按键，然后通过缩小检测距离和设计隔音腔有效实现对环境噪音的隔离，最终使传声器有效采集键盘按键音。该方法有利于同类型设备在工业上的大规模使用,并可大幅度降低设备生产成本。 |
| 英文摘要: |
| The traditional sound detection of computer keyboard uses a mute-motor to tap the cap of keyboard. Besides, the process of detection must be in the silent room. The cost of sound detection is very expensive so that it can’t be used widely. In this letter, we propose an advanced method to detect the sound of keyboard. First, the electromagnet, which is driven by the analog signal, taps the cap of keyboard. By this way, the process of tapping caps can be perfectly simulated. Then we designed a cavity, which can insulate the background noise effectively. The microphone was placed in the cavity and near by the electromagnet and keyboard, which can improve the signal-noise ratio effectively. The proposed design could open up an alternative avenue for the sound detection of computer keyboard. |
| DOI：10.11684/j.issn.1000-310X.2020.03.018 |
| 中文关键词: 按键异音检测，模拟手指敲击，微弱信号采集，隔音腔 |
| 英文关键词: Detecting abnormal sound , Simulated finger percussion , Weak signal collecting, Soundproof cavity |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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