Emergency Vehicle Warning Systems
Author : Arthur I. Rubin
Publisher :
Page : 36 pages
File Size : 37,33 MB
Release : 1981
Category : Emergency vehicles
ISBN :
Author : Arthur I. Rubin
Publisher :
Page : 36 pages
File Size : 37,33 MB
Release : 1981
Category : Emergency vehicles
ISBN :
Author : Robert A. De Lorenzo
Publisher :
Page : 0 pages
File Size : 15,2 MB
Release : 1991
Category :
ISBN :
Author : United States. National Bureau of Standards. Building Research Division
Publisher :
Page : 88 pages
File Size : 31,37 MB
Release : 1972
Category : Automobiles
ISBN :
Author : David Green
Publisher :
Page : 25 pages
File Size : 35,30 MB
Release : 1977
Category :
ISBN :
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 152 pages
File Size : 23,63 MB
Release : 2018-07-17
Category :
ISBN : 9781723040894
The EVAS provides warning for hearing-impaired motor vehicle drivers that an emergency vehicle is in the local vicinity. Direction and distance to the emergency vehicle are presented visually to the driver. This is accomplished by a special RF transmission/reception system. During this phase the receiver and transmitter from Phase 1 were updated and modified and a directional antenna developed. The system was then field tested with good results. Static and dynamic (moving vehicle) tests were made with the direction determined correctly 98 percent of the time. Barr, Tom and Harper, Warren and Reed, Bill and Wallace, David Unspecified Center DIRECTIONAL ANTENNAS; DYNAMIC TESTS; EMERGENCIES; MOTOR VEHICLES; STATIC TESTS; WARNING SYSTEMS; RADIO FREQUENCIES; RECEIVERS; TRANSMITTERS...
Author : Arthur I. Rubin
Publisher :
Page : 36 pages
File Size : 12,7 MB
Release : 1981
Category : Emergency vehicles
ISBN :
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 32 pages
File Size : 34,24 MB
Release : 2018-07-02
Category :
ISBN : 9781722201692
The Emergency Vehicle Alert System (EVAS) program is sponsored by the NASA/MSFC Technology Utilization (TU) office. The program was conceived to support the needs of hearing impaired drivers. The objective of the program is to develop a low-cost, small device which can be located in a personal vehicle and warn the driver, via a visual means, of the approach of an emergency vehicle. Many different technologies might be developed for this purpose and each has its own advantages and drawbacks. The requirements for an acoustic detection system, appear to be pretty stringent and may not allow the development of a reliable, low-cost device in the near future. The problems include variations in the sirens between various types of emergency vehicles, distortions due to wind and surrounding objects, competing background noise, sophisticated signal processing requirements, and omni-directional coverage requirements. Another approach is to use a Radio Frequency (RF) signal between the Emergency Vehicle (EV) and the Personal Vehicle (PV). This approach requires a transmitter on each EV and a receiver in each PV, however it is virtually assured that a system can be developed which works. With this approach, the real technology issue is how to make a system work as inexpensively as possible. This report gives a brief summary of the EVAS program from its inception and concentrates on describing the activities that occurred during Phase 4. References 1-3 describe activities under Phases 1-3. In the fourth phase of the program, the major effort to be expended was in development of the microcontroller system for the PV, refinement of some system elements and packaging for demonstration purposes. An EVAS system was developed and demonstrated which used standard spread spectrum modems with minor modifications. Reed, Bill and Crump, Roger and Harper, Warren and Myneni, Krishna Marshall Space Flight Center NAS8-39383...
Author : Arthur I. Rubin
Publisher :
Page : 21 pages
File Size : 34,63 MB
Release : 1981
Category :
ISBN :
Author : D. D. Peterson
Publisher :
Page : 164 pages
File Size : 44,33 MB
Release : 1975
Category : Traffic safety
ISBN :
Author : United States. National Bureau of Standards. Building Research Division
Publisher :
Page : 122 pages
File Size : 17,79 MB
Release : 1972
Category : Automobiles
ISBN :