CN-122008991-A - Driver anti-sleepiness seat based on biomechanical awakening and control method

CN122008991ACN 122008991 ACN122008991 ACN 122008991ACN-122008991-A

Abstract

The application provides a biomechanical awakening-based anti-drowsiness seat for a driver and a control method, wherein the seat comprises a seat cushion, the rear end of the seat cushion is provided with a backrest, the upper end of the backrest is provided with a headrest, the seat also comprises a sensing module, an executing module and a control module, the sensing module comprises a body pressure distribution monitoring unit, the body pressure distribution monitoring unit is a flexible pressure sensor array buried between a foaming layer and a face cover of the seat cushion and in the backrest, the executing module comprises a subsonic frequency micro-vibration unit, a bionic pulse air cushion unit and a dynamic side bag slapping unit, the subsonic frequency micro-vibration unit is a linear vibration motor fixed on a framework below the seat cushion, the bionic pulse air cushion unit comprises a strip-shaped thigh supporting air bag arranged at the front end of the seat cushion and left and right waist air bags arranged inside the backrest, the dynamic side bag slapping unit comprises left and right waist side bags arranged at two sides of the backrest, and the control module is electrically connected with the sensing module and the executing module. The application can actively prevent and intervene the fatigue and sleepiness of the driver.

Inventors

TANG JINGRUI
TAN ZHENGSHENG
ZENG BIN
FENG SHIFU

Assignees

重庆化工职业学院

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (5)

1. The driver anti-drowsiness seat based on biomechanics awakening comprises a cushion, wherein a backrest is arranged at the rear end of the cushion, a headrest is arranged at the upper end of the backrest, the seat is characterized by further comprising a sensing module, an executing module and a control module, the sensing module comprises a body pressure distribution monitoring unit, the body pressure distribution monitoring unit is a flexible pressure sensor array buried between a foaming layer and a face sleeve of the cushion and in the backrest, the executing module comprises an subsonic frequency micro-vibration unit, a bionic pulse air cushion unit and a dynamic side bag beating unit, the subsonic frequency micro-vibration unit is a linear vibration motor fixedly arranged on a framework below the cushion and suitable for producing subsonic frequency vibration, the bionic pulse air cushion unit comprises a strip-shaped thigh supporting air bag arranged at the front end of the cushion, and a left waist air bag and a right waist air bag which are arranged inside the backrest and correspond to two sides of the waist, the thigh supporting air bag, the left waist air bag and the right waist air bag are respectively connected with the micro-air pump through electromagnetic valves which are hidden in the bottom of the seat, the dynamic side bag beating unit comprises a waist side supporting air cushion, a left side vibration unit, a bionic pulse air cushion unit and a dynamic side bag beating unit, a high-speed driving mechanism, a high-speed side electromagnetic valve, a high-speed air pump and a high-speed driving mechanism, a high-speed side electromagnetic valve, a high-speed flexible bag, and a high-speed driving side bag, and a high-speed flexible bag, and a high-speed driving mechanism are arranged at the high-speed side, and a high-speed side driving device, and the high-speed driving device are connected to the waist bag.
2. The biomechanically awakening-based driver anti-drowsiness seat according to claim 1, wherein the sensing module further comprises a physiological signal monitoring unit electrically connected with the control module, and the physiological signal monitoring unit is an optical fiber sensor or a piezoelectric film sensor embedded in the seat cushion and suitable for non-contact extraction of heartbeat and respiratory frequency data of the driver.
3. The biomechanically wake-based driver anti-drowsiness seat according to claim 1, characterized in that the perception module further comprises a vehicle status interface unit electrically connected to the control module and integrated with the CAN bus communication module, the vehicle status interface unit being adapted to communicate with the vehicle CAN bus for obtaining steering wheel angle and lane keeping status data.
4. A method for controlling a driver anti-drowse seat based on biomechanical wake-up, wherein the method employs a driver anti-drowse seat based on biomechanical wake-up as claimed in claim 1, the method comprising: when a driver starts the vehicle, the control module activates the linear vibration motor to continuously generate subsonic frequency vibration with the frequency of 15-20Hz and the amplitude of 0.1-0.5 mm; The control module receives pressure distribution data of the cushion and the backrest monitored by the flexible pressure sensor array in real time, after a set time is travelled, the control module monitors that the cushion pressure distribution data corresponding to the sitting posture of the driver is kept unchanged within a preset duration, or the gravity center corresponding to the head posture reflected by the pressure distribution data of the backrest is suddenly shifted and quickly corrected, so that the driver is judged to enter a fatigue critical state; When the driver is judged to enter a fatigue critical state, the control module controls the micro air pump to start and controls the electromagnetic valve to be randomly opened, so that the thigh support air bag, the left waist air bag and the right waist air bag carry out irregular micro inflation and deflation, the thighs and the waists of the driver are forced to generate unpredictable micro displacement, and the static sitting posture is broken to carry out light intervention; After slight intervention is performed for a preset time, the control module still detects that cushion pressure distribution data corresponding to the sitting posture of a driver still has no obvious change, or the frequency of sudden deviation and rapid correction of the center of gravity corresponding to the head posture reflected by the backrest pressure distribution data is increased, and the control module controls the high-speed air pumps corresponding to the left waist side bag, the right waist side bag, the left shoulder side bag and the right shoulder side bag to start and control the high-speed electromagnetic valves to open, so that the left waist side bag, the left shoulder side bag, the right waist side bag and the right shoulder side bag are correspondingly folded inwards and unfolded outwards, so that rapid left and right soft slapping of the waist side and the shoulder side of the driver is performed for deep intervention, and sleep inertia is interrupted to wake from a hazy state.
5. The control method for the anti-drowsiness seat for the driver based on biomechanical wake-up according to claim 4, wherein the air bag volume variation range of the thigh support air bag, the left waist air bag and the right waist air bag for irregular minute inflation and deflation is 3% -5%, the period is randomly varied between 3 seconds and 8 seconds, the air bag volume variation range of the left waist side air bag and the left shoulder side air bag and the right waist side air bag for inflation and deflation is 1% -10%, and the period is rapidly varied between 1 second and 1.5 seconds.

Description

Driver anti-sleepiness seat based on biomechanical awakening and control method Technical Field The invention relates to the technical field of automobile seats and driver state monitoring, in particular to a biomechanical awakening-based driver anti-sleepiness seat and a control method. Background At present, early warning and intervention devices for driver fatigue driving are mainly classified into two categories: 1) Monitoring alarms such as monitoring driver facial features (blink frequency, yawning) based on cameras, or determining based on vehicle travel trajectory (lane departure). When it is determined that the vehicle is tired, a sound alarm is given by a buzzer or the steering wheel/seat is vibrated vigorously. However, most of the methods are post-alarming, namely intervention is performed when a driver enters a micro-sleep state or a dangerous state of the vehicle occurs, hysteresis is provided, and a severe alarming mode easily causes frightening of the driver to cause misoperation. 2) The common massage chair has the function of multi-point massage and can be opened manually by a driver. The massage function is irrelevant to the fatigue state of the driver, intelligent and automatic active intervention cannot be realized, the conventional massage has large amplitude and strong regularity, the driver is easy to adapt to and generate new sleepiness, and continuous alert awakening cannot be realized. Thus, there is a need for a mild, continuous, non-invasive anti-drowsiness solution that enables preventive intervention before the driver enters a fatigue critical state. Disclosure of Invention Aiming at the technical problems that the existing driver fatigue driving early warning and intervention technology has the disadvantages of delayed intervention, severe awakening mode and incapability of continuously keeping alertness, the invention provides a driver anti-sleepiness seat based on biomechanical awakening and a control method. In order to solve the technical problems, the invention adopts the following technical scheme: On the one hand, the invention provides a driver anti-drowsy seat based on biomechanical awakening, which comprises a seat cushion, wherein the rear end of the seat cushion is provided with a backrest, the upper end of the backrest is provided with a headrest, the seat also comprises a sensing module, an executing module and a control module, the sensing module comprises a body pressure distribution monitoring unit, the body pressure distribution monitoring unit is a flexible pressure sensor array buried between a foaming layer and a surface sleeve of the seat cushion and in the backrest, the executing module comprises an subsonic micro-vibration unit, a bionic pulse air cushion unit and a dynamic side bag beating unit, the subsonic micro-vibration unit is a linear vibration motor fixedly arranged on a framework below the seat cushion and suitable for generating subsonic vibration, the bionic pulse air cushion unit comprises a strip-shaped thigh supporting air bag arranged at the front end of the seat cushion, and left and right waist air bags arranged inside the seat cushion and corresponding to two sides of the waist, the thigh supporting air bags, the left waist air bags and the right waist air bags are respectively connected with a micro-air pump through hiding, the flexible pressure sensor array arranged on the bottom of the seat cushion and in the backrest, the dynamic side bag beating unit comprises a subsonic micro-vibration motor, a high-speed electromagnetic valve, a high-speed driving side and an air pump, a high-speed air pump driving mechanism arranged on the left side and a high-speed air pump, and a high-speed flexible bag driving side, and an air pump driving mechanism. Further, the sensing module further comprises a physiological signal monitoring unit electrically connected with the control module, and the physiological signal monitoring unit is an optical fiber sensor or a piezoelectric film sensor embedded in the cushion and suitable for non-contact extraction of heartbeat and respiratory frequency data of a driver. Further, the sensing module further comprises a vehicle state interface unit which is electrically connected with the control module and integrated with the CAN bus communication module, and the vehicle state interface unit is used for acquiring steering wheel rotation angle and lane keeping state data through communication with the vehicle-mounted CAN bus. In another aspect, the present invention provides a method for controlling a driver anti-drowse seat based on biomechanical wake-up, wherein the method adopts the aforementioned driver anti-drowse seat based on biomechanical wake-up, and the method comprises: when a driver starts the vehicle, the control module activates the linear vibration motor to continuously generate subsonic frequency vibration with the frequency of 15-20Hz and the amplitude of 0.1-0.5 mm; The control module receives p