Vehicle-mounted fatigue early warning device and method thereof

Abstract

The invention discloses a vehicle-mounted fatigue early warning device and a method thereof. The vehicle-mounted fatigue early warning device comprises an image acquisition unit, an image processing and positioning unit, a fatigue detection unit, a control unit used for controlling the coordinated operation of all functional units and a warning unit. The method comprises the following: the first step, acquiring pupil image data; the second step, position-processing the acquired pupil image data; the third step, working out a pupil area, and judging whether a driver is tired according to the percentage of eye-closing time against unit time; and the fourth step, sending out a warning signal according to a judging result. The device uses an FPGA chip, and realizes the eye positioning algorithm in a mode of digital circuit system. Compared with the prior art, the device has the advantages of high real-time response, quick and timely early warning on fatigue, small volume, low power consumption, convenient assembly and the like, so that the device is quite suitably applied to a vehicle-mounted electric system.

Description

technical field [0001] The invention relates to the field of fatigue driving supervision and inspection instruments and methods, in particular to a vehicle-mounted fatigue early warning device and method. Background technique [0002] The current types of methods for fatigue driving supervision and inspection: one is to use the relationship between the physiological characteristics of people when they are fatigued and fatigue, and monitor the fatigue state of the tester by detecting these physiological characteristics. [0003] PERCLOS method (percentage of eyelid closure over the pupil overtime) to detect the size of the driver's retina. PERCLOS is the percentage of time the eyes are closed for a specific time. Through the camera installed on the dashboard in front of the driver, the data of the driver's blink frequency and eye closing time are obtained. Other measurement methods and sensors. The relationship between pulse changes and fatigue is used to monitor the driver...

AI Technical Summary

Problems solved by technology

[0015] In order to overcome the fatigue detection system and method of the existing technology, the accuracy is extremely poor, the real-time performance and applicability are low, the cost of the product platform is high, the power consumption is large, it is not suitable for vehicles, the research and development cost is huge, and the volume is relatively large , inconvenient installation, and high cost technical problems, the present invention provides a vehicle-mounted fatigue early warning device and method

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