| 摘要 |
An anti-theft device (10), comprising a circuit board (12), an optical control assembly (14), a sounder (16) and a main controller (20); an antenna (28) is provided on one surface of the circuit board (12); the optical control assembly (14) is disposed on the circuit board (12); the sounder (16) is electrically connected to the optical control assembly (14); when the optical control assembly (14) senses light, the sounder (16) makes a sound; the main controller (20) is disposed on the circuit board (12) and comprises a sensing and detection unit; the sensing and detection unit is linked with an application software in a mobile phone via wireless signal transmission so as to detect a relative distance or range between the anti-theft device and the mobile phone. When the optical control assembly (14) senses light, the sounder (16) and/or the mobile phone makes a sound; in addition, when the circuit board (12) is away from the mobile phone by a preset distance, the mobile phone and/or the sounder also gives an alarm, thus intelligently preventing a wallet, a briefcase, a passport or a mobile phone from being lost or stolen. |
