Vehicular fatigue driving monitoring system

A fatigue driving and monitoring system technology, which is applied in the field of automobile fatigue driving monitoring system, can solve the problems that non-contact detection cannot be realized, and achieve the effects of reducing the amount of computation, avoiding signal distortion, and flattening the frequency response curve

Inactive Publication Date: 2017-01-04
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, due to the particularity of physiological signal detection, it is difficult to directly apply the existing general-purpose Doppler radar module to physiological signal detection; because the breathing and heartbeat signals are e

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  • Vehicular fatigue driving monitoring system
  • Vehicular fatigue driving monitoring system
  • Vehicular fatigue driving monitoring system

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Embodiment Construction

[0051] The automobile fatigue driving monitoring system provided by the present invention will be further described below in conjunction with the accompanying drawings.

[0052] Studies have found that when the human body is in a state of fatigue, its breathing and heart rate signals will decrease, so the breathing and heart rate signals can accurately judge the fatigue state of the human body. In order to overcome the technical defect of using contact sensors to detect physiological signals in the prior art, the applicant proposed for the first time to apply the common Doppler radar in the prior art to the field of non-contact fatigue driving detection.

[0053] Doppler radar is widely used in airborne early warning, navigation, missile guidance, satellite tracking, battlefield reconnaissance, shooting range measurement, weapons and other military fields. Its working principle can be expressed as follows: When the radar emits a pulse wave with a fixed frequency to scan the ai...

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Abstract

The invention discloses a vehicular fatigue driving monitoring system; a Doppler radar detection unit for detecting physiological signal changes of a driver is mounted in a cab and comprises a Doppler radar sensor, a power module, a signal preprocessing module, a differential amplifier, an active bandpass filter, a respiratory and heartbeat signal separation module and a MCU (microcontroller unit) module, wherein the Doppler radar sensor is used for transmitting continuous wave radar signals to a human chest and outputting low-frequency signals, the low-frequency signals are sequentially subjected to multistage signal treatment, and the MCU module acquires human a body respiratory signal and a heartbeat signal and judges whether the driver is in fatigue driving state or not according to the changes in the body respiratory signal and heartbeat signal. Compared with the prior art, it is proposed for the first time that fatigue level of a driver is monitored by means of Doppler measurement technology, detection of steering wheel angle information is added to the system, and fatigue driving measurement precision is improved through multi-source information processing.

Description

technical field [0001] The invention relates to the field of fatigue driving monitoring, in particular to an automobile fatigue driving monitoring system based on physiological signal detection. Background technique [0002] Drowsy driving is one of the most common causes of traffic accidents in the world. According to the report of WHO (World Health Organization), more than 1.3 million people die in traffic accidents every year, and 20 to 50 million people suffer non-fatal injuries because of traffic accidents. Among them, about 20% of fatal traffic accidents are caused by fatigue driving. Therefore, if a system for automatically detecting fatigue driving can be developed, a large number of fatal accidents can be avoided. [0003] In order to prevent the occurrence of such accidents, an effective monitoring system for fatigue driving is necessary, which can remind the driver before the accident occurs, thereby avoiding or reducing the occurrence of such traffic accidents....

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Application Information

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IPC IPC(8): G08B21/06A61B5/08A61B5/024
CPCG08B21/06A61B5/024A61B5/08A61B5/725
Inventor 陈龙杨希宁胡华程知群樊凌雁马学条
Owner HANGZHOU DIANZI UNIV
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