发明授权
- 专利标题: Device for visibility measurement for a motor vehicle
- 专利标题(中): 机动车辆可见度测量装置
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申请号: US258465申请日: 1988-10-17
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公开(公告)号: US4931767A公开(公告)日: 1990-06-05
- 发明人: Hans Albrecht , Siegfried Reiniger , Wolfgang Lauer , Hans Spies , Horst Laucht , Martin Spies
- 申请人: Hans Albrecht , Siegfried Reiniger , Wolfgang Lauer , Hans Spies , Horst Laucht , Martin Spies
- 申请人地址: DEX Stuttgart
- 专利权人: Daimler-Benz AG
- 当前专利权人: Daimler-Benz AG
- 当前专利权人地址: DEX Stuttgart
- 优先权: DEX3735267 19871017
- 主分类号: G01N21/49
- IPC分类号: G01N21/49 ; B60K35/00 ; B60Q1/52 ; G01N21/47 ; G01N21/53 ; G01S17/88 ; G01S17/95
摘要:
The device for visibility measurement is designed primarily for use in motor vehicles. A light emitter is arranged inside the driver's compartment preferably on the rear view mirror in front of the windshield. The light emitter generates light pulses or flashes radiating through the windshield. The light scattered back due to soiling on the inside and outside of the windshield or in scatter zones, formed by fog or smoke or the like, in front of the windshield, impinges a light sensor, preferably likewise arranged on the rear view mirror inside the driver's compartment. By utilizing light pulses of various wavelengths and processing of the output signals of the light sensor in predetermined or predeterminable time windows or intervals, not only the respective visibility but also the type of viewing impairment can be determined.