Vehicle mounted device used for long distance vehicle recognition system
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 沈阳睿能科技有限公司
- Publication Date
- 2008-02-06
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention relates to the technical field of vehicle identification, in particular to a vehicle-mounted device used in a long-distance vehicle identification system. Background technique
[0002] Most of the existing domestic long-distance vehicle identification technologies use 125KHZ or 13.65MHZ medium and low frequency for identification, but the effective identification distance is short.
[0003] There is also a long-distance vehicle identification system mainly used in highways, bridge toll gates, etc., which can realize long-distance identification and non-stop passing of passing vehicles. The main technology uses 935MHZ high-frequency induction technology or 2.4GHZ microwave technology products to realize long-distance Distance identification, the identification card is an active card, and the identification distance is longer. Since the active card is thicker than the passive card, and the identification card must be installed on the front...