Resources Contact Us Home
Alarm system for preventing an automotive vehicle driver from dozing at the wheel

Image Number 6 for United States Patent #4509040.

An alarm system for a vehicle driver to prevent from dozing at wheel. The system includes structure for detecting drowsiness of the driver on a basis of abnormal steering change repetitions for a fixed period of time in a monotonous driving state defined, for example, as the transmission gear position being maintained at an overdrive or top position. The alarm system produces an alarm to the driver to prevent the driver from increasing the state of drowsiness. The drowsiness alarm system according to the present invention comprises a steering signal generator which generates a signal corresponding to the change of an angle through which the steering wheel is rotated, a monotonous driving-state detector which detects and signals that the vehicle is traveling in a monotonous driving state, a discriminator which compares the change of steering signal level from said steering signal generator for a fixed period of time with a reference value, and an alarm pulse generator which outputs an alarm pulse into an alarm circuit producing an alarm in response to the input alarm pulse when the output signal from the discriminator indicating the change of steering signal for the fixed period of time exceed the reference voltage.

  Recently Added Patents
Composable SQL query generation
Charging connector for electric vehicle
Apparatus and methods for performing sequence detection
Content reproduction apparatus, status bar display method, and status bar display program
Apparatus and method for image coding and decoding
Cholera vaccines
Fully insulated glass panel rolling door
  Randomly Featured Patents
Device for altering cam profile
Probe card transporting apparatus and to-be-connected body moving mechanism
Apparatus for constructing multi-piece carton pre-forms
Aircraft exhaust vent assembly
Detection of sensor off conditions in a pulse oximeter
Heat exchanger fin with ribbed hem
Synchronization of time stamps of peer devices in a communication node
Method and apparatus for installing a cementing float shoe on the bottom of a well casing
Output circuit with optically coupled control signals