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Browse Prior Art Database

Automatic Governing of Vehicular Speed

IP.com Disclosure Number: IPCOM000125736D
Original Publication Date: 2005-Jun-15
Included in the Prior Art Database: 2005-Jun-15
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Abstract

Disclosed is a method of controlling vehicular speed via external stimulus. By linking the onboard computer in a vehicle to transmitters on the side of the roadway, using RFID technology or Bluetooth technology, a maximum speed limit can be transmitted from the roadside to the car computer. Whenever the signal is received, it has two values embedded within the transmitted data. The first is the maximum speed limit, and the second is the duration for the speed limit to remain in effect. The onboard computer in the car uses the values as the maximum speed for the governor/car, and a fixed time to disable the governor. If a new signal is detected, the governor is set to the new value, and the timer is reset. Thus, the device acts as a governor for the vehicle, with the embedded transponders in the roadside setting the local speed limit. The transponders can be set to change the maximum speed limit based on the time of day, day of the week, etc., so that school zones can be accounted for.

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Automatic Governing of Vehicular Speed

Disclosed is a method of controlling vehicular speed via external stimulus. By linking the onboard computer in a vehicle to transmitters on the side of the roadway, using RFID technology or Bluetooth technology, a maximum speed limit can be transmitted from the roadside to the car computer. Whenever the signal is received, it has two values embedded within the transmitted data. The first is the maximum speed limit, and the second is the duration for the speed limit to remain in effect. The onboard computer in the car uses the values as the maximum speed for the governor/car, and a fixed time to disable the governor. If a new signal is detected, the governor is set to the new value, and the timer is reset. Thus, the device acts as a governor for the vehicle, with the embedded transponders in the roadside setting the local speed limit. The transponders can be set to change the maximum speed limit based on the time of day, day of the week, etc., so that school zones can be accounted for.

Referring to figure 1, an eastbound vehicle 220 is traveling on roadway 230. Eastbound transponder 206 transmits an encoded radio signal 216 with a max speed limit and duration for a distance of 20 meters. Vehicles 220 and 222 have onboard receivers connected to their respective computers 220. Said receivers are unidirectional, such that they only receive signals transmitted from the passenger side of the car. When eastbound vehicle 220 comes w...