Remote-controlled access control device, in particular for a motor vehicle, and portable transponder which is configured for it

US6577227B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Thomas Kirchlinde · Regensburg, DE
• Thomas Röhrl · Barbing, DE
• Wolfgang Piesch · Regenstauf, DE

Key dates

• Filing date: Dec 6, 1999
• Grant date: Jun 10, 2003
• Expiry date: Dec 6, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C2209/63
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A remote-controlled access control device includes a stationary transceiver device with a triggering device and a portable transponder. The stationary transceiver device transmits an interrogation code signal in response to the triggering device being activated. The portable transponder receives the interrogation code signal and has a manually activatable activation element. The portable transponder generates a code signal and transmits, together with the code signal, information indicating whether the code signal is generated in response to the interrogation code signal or in response to the activation element being activated. The stationary transceiver device receives the information together with the code signal and generates an unlocking signal based on an evaluation of the code signal with the information indicating whether the code signal is generated in response to the interrogation code signal or in response to the activation element being activated.