Prevent fatigue driving
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The technique of detecting driver's sleepiness has reached a practical level. This technique quickly detects sleepiness by analyzing the blood vessels of the earlobe and the beating of the heart. After commercial use such as buses, easy-to-use products for the general consumer have also emerged.
"I usually pay attention to health management and sleep, and if I have this, I can drive safer," said Yukihiro Yuki, the driver of Kanagawa Chuo Transportation Co., which operates buses and express buses in Kanagawa Prefecture.
Yeouido showed the author a lanyard-type terminal worn around his neck. This is Fujitsu's "FEELythm" launched in February 2015, and it looks like wearing a headset. In this product, there is potential to change the status quo of Japanese traffic.
FEELythm uses sensors to detect the pulse wave of the earlobe, which is the pressure of the capillaries that change as the heart beats. The principle is to use the sensor to capture the strength of the pulse and analyze it to calculate the level of drowsiness. You can grasp the precursors of the sleep that the driver himself does not realize. Once the sleepiness increases, the driver will be reminded to prevent fatigue driving from causing an accident.
Difficult perception technology is an important step in achieving autonomous driving. The technical difficulty of realizing a "fully self-driving car" is very high. At present, the steering wheel must be operated by a person in case of danger. When switching from autonomous driving to manual driving, if the driver is dozing off, it may cause a major accident. Nanshan Lunsheng, who is responsible for the development of FEELythm's Fujitsu ubiquitous product group, said that the "fatigue driving prevention system is very effective" to prevent this from happening.
In March 2015, the large bus operator Kanagawa Central Transportation Co., Ltd. cooperated with Fujitsu to carry out the verification experiment of FEELythm, and a total of 150 drivers wore the product. After analyzing the data, Mi Shanren, managing director of Shennai Information Systems, said with satisfaction: "The sleepiness of drivers who could not be mastered in the past has been visualized."
FEELythm is loosely hung around the neck like a lanyard. The lithium battery is used as a power source. In order to meet the needs of driving long-distance trucks and other applications, it can be used continuously for one week without charging. The weight is about 90g, and basically no burden is felt.
Vibration warning when sleepiness increases
The wires extending from the body are connected to the ear clips with built-in infrared sensors. Clip the ear clip on the earlobe to collect the driver's pulse data.
The pulse data collected by the sensor will be sent to a dedicated device or smartphone set in the car for real-time analysis to calculate the “sleepinessâ€. The picture below shows the driver's sleepy changes. It can be seen that on the highway with less traffic, the driver's sleepiness will increase. In the case of encountering a situation such as a gaze, the state of tension is raised, and the waking is temporarily restored.
When the dedicated device or smartphone finds that the driver's sleepiness rises, the FEELythm mainframe worn around the neck will vibrate and alert the driver through the voice of “knowing sleepy, please restâ€.
The driver sometimes does not notice the rise of sleepiness. FEELythm is characterized by the ability to inform the driver of this phenomenon as a precursor to sleepiness. By slamming the accident before the "sleeping magic" really came, the accident was killed in the bud.
Shan Tianya, a senior manager of Fujitsu's Business Strategy Division, explained: “The pulse has been fluctuating. When the driver is awake, the pulse is fluctuating violently, and after the fatigue, the fluctuation is reduced.â€
The waveform of the pulse wave varies from person to person, and FEELythm automatically senses the waveform and adjusts it. After 2 weeks of continuous use, the judgment level of the sleepiness level will be greatly improved.
The purpose of Fujitsu is not just to develop an "alarm clock."
When and where did the driver of the car rise to what level? By linking the data collected by FEELythm with the operation management system of the truck and bus company, it is possible to reveal the location and time of easy sleep. Fujitsu will use these data to find out the roads that are easy to doze, and further reduce the risk of accidents by making dangerous maps and adjusting driver scheduling.
By analyzing the pulse data more deeply, in addition to being sleepy, the degree of stress and fatigue can be revealed. Nantong of Fujitsu said with enthusiasm that in the future, "there will be a service to help drivers manage health." The price of FEELythm is 50,000 to 60,000 yen. The company hopes to sell 70,000 units in the next three years and gradually accumulate data.
Use glasses to perceive "sleeping eyes"
It is not just Fujitsu that sees business opportunities from sleepy perception technology. Because of the popularity of communication methods such as Bluetooth, it has become possible to collect data in real time from various devices.
Toshiba Information Systems develops sleep-aware systems using medical sensors (right)
Toshiba Information Systems' "Body Future Safe Driving Watch Service" is able to detect ECG-awareness with medical sensors. Apply the “Silmee†sensor used in the medical field to the driver's chest. In addition to analyzing the accidents by analyzing the electrocardiogram, it is also possible to use the smartphone installed in the car to sense the sudden braking, steering wheel shake and distance. It is also one of the characteristics of the service to comprehensively judge the driver's fatigue while detecting the drowsiness. In March 2015, the company launched a verification experiment in cooperation with a taxi company in Kawasaki City.
The problem facing the service is "many drivers have a feeling of resistance to using a gel to stick sensors near the heart" (Toshiba Information Systems Technical Coordinator Consultant Watanabe Toshiyuki). In the future, the company will also consider non-contact sensors and wristband sensors that can sense pulse and heartbeat through air vibration in the car.
Not only for "professionals" such as bus and taxi drivers, but also terminals that can be used by general drivers. The large eyewear chain JIN will launch the multi-functional glasses "JINS MEME" in the fall of 2015.
MEME uses the accelerometer built into the eyeglass frame to grasp the movements of the body. Moreover, it is also possible to use the "eye potential sensor" provided between the nose pad and the eyebrow to grasp the movement of the blink and the line of sight in real time.
As described in "sleepy eyes", when people are sleepy, there will be unique movements in the eyes, or the number of blinks will increase. After MEME senses these actions, it sends data to the smartphone, uses its unique system to determine the level of sleepiness, and then issues a warning via voice.
Fatigue driving prevention technology benefits all drivers. Although there are still problems in terms of accuracy and durability, as long as one step ahead of the opponent, it is expected to harvest fruitful results.
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