CN104875617A - Limiting device and limiting method for preventing drunk driving or fatigue driving - Google Patents
Limiting device and limiting method for preventing drunk driving or fatigue driving Download PDFInfo
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- CN104875617A CN104875617A CN201510173450.5A CN201510173450A CN104875617A CN 104875617 A CN104875617 A CN 104875617A CN 201510173450 A CN201510173450 A CN 201510173450A CN 104875617 A CN104875617 A CN 104875617A
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Abstract
The invention discloses a limiting device and a limiting method for preventing drunk driving or fatigue driving. On the premises that the heart rate of a normal person is 60-100 beats/minute, the heart rate of the person rises after drinking, fatigue driving belongs to psychological fatigue, and the heart rate falls when the person is in the psychological fatigue condition, a plurality of green LED light-emitting modules and a plurality of phototransistor light intercepting modules are arranged on parts (such as the three o'clock position and the nine o'clock position), in contact with fingers or palms, on a steering wheel, according to the characteristic that hemoglobin in blood can absorb green wavelengths easily, LEDs are utilized to illuminate the fingers or the palms, the heart rate can be measured by means of measuring heart rate cycles according to changes of reflected light, and the heart rate of a driver can be measured at regular intervals. The limiting device and the limiting method have the advantages that when the measured heart rate is larger than 100 beats/minute or smaller than 60 beats/minute, kind warning is given to the driver, an automobile can be locked automatically, and engine start is forbidden.
Description
Technical field
The present invention relates to restraint device, specifically be a kind of restraint device and method for limiting of preventing drunk driving or fatigue driving.
Background technology
Prevent all multi-methods of drunk driving from mainly containing three kinds at present, the first is by installing alcohol tester at operator's compartment, and the alcohol content of test driver breath, judges whether chaufeur drinks.It two is obtain chaufeur facial information by camera head, judges whether chaufeur drinks or whether fatigue driving after carrying out image procossing.It three is allow navigating mate wear heart rate monitor, by measuring the heart rate of chaufeur, judges whether chaufeur drinks or whether fatigue driving.If find drunk driving or fatigue driving, then carry out the prompting of good will or forbid vehicle launch.
Summary of the invention
The present invention provides a kind of restraint device and the method for limiting that prevent drunk driving or fatigue driving for solving the problems of the technologies described above, based on normal person's heart rate at 60-100 beat/min, and heart rate rises after drinking, mental fatigue is belonged to during fatigue driving, now heart rate declines this prerequisite, the light emitting module of finger or palm touching part (positions as 3 and 9) several green LED that distributes and phototransistor are subject to optical module on the steering wheel, the haemoglobin in blood is utilized easily to absorb the characteristic of the light of green wavelength, with LED illumination finger or palm, utilize the change of its reflected light to measure the cycle of heart rate thus to reach the object measuring heart rate, a heart rate measurement is carried out to chaufeur in interval at regular intervals.When institute's heart rate measuring be greater than 100 beats/min or be less than 60 beats/min time, good will prompting is carried out to chaufeur, and the vehicle that is automatically locked, forbids engine starting.
The technical scheme adopted for realizing above-mentioned technical purpose is: a kind of restraint device preventing drunk driving or fatigue driving, comprise driving circuit, green LEDs module, phototransistor is by optical module, low-pass filter, impedance inverter circuit, signal amplifier, integrating circuit, hysteresis comparator, micro controller system, engine control circuit, heart rate display, driving circuit drives by optical module green LEDs module and phototransistor, and to green LEDs module and phototransistor light module for power supply, green LEDs module and phototransistor are by the adjacent setting of optical module on the steering wheel, phototransistor by optical module successively with low-pass filter, impedance inverter circuit, signal amplifier, integrating circuit, hysteresis comparator and micro controller system connect, mouth connecting engine control circuit and the heart rate display respectively of micro controller system.
A kind of method for limiting preventing the restraint device of drunk driving or fatigue driving:
Step one, when chaufeur into the car and in opening vehicle after power supply, driving circuit is the DC point that green LEDs module and phototransistor light module installation one are suitable, and provides drive current;
Step 2, finger or palm touchs several green LEDs module of distributing on the steering wheel and phototransistor is subject to optical module, with green LEDs module radiates finger or palm, phototransistor receives the reflected light that finger or palm reflect by optical module, the reflected light of collection is converted into reflected light signal by optical module by phototransistor, reflected light signal passes through low-pass filter, impedance inverter circuit, signal amplifier, integrating circuit, hysteresis comparator enters micro controller system, micro controller system measures heart rate according to the change of reflected light signal, a heart rate measurement is carried out to chaufeur in interval at regular intervals, when institute's heart rate measuring be greater than 100 beats/min or be less than 60 beats/min time, micro controller system to be automatically locked vehicle by engine control circuit, forbid engine starting, and show heart rate information by heart rate display.
After described heart rate display startup exceeds 4 hours, the alarm that prompting chaufeur is had a rest will be sent.
Beneficial effect of the present invention is: light emitting module and phototransistor 1, by installing LED on the steering wheel measure heart rate by optical module, the impact of other occupant's factors in car can be got rid of, such as, in car, other occupant drinks on the impact of alcohol tester, and other occupant replaces chaufeur to wear heart rate monitor escape detection etc.; 2, by reflected light measurement heart rate, strong interference immunity, can reduce the impact of environment inside car factor; 3, Measuring Time is short, only needs very short time to measure heart rate; 4, every 20 minutes, hand is placed on the light emitting module of green LED with voice message chaufeur and phototransistor carries out heart rate measurement by optical module, realizes dynamic monitoring; 5, after the chaufeur time of driving exceeds 4 hours, regardless of heart rate measurements, chaufeur is all reminded to have a rest; 6, by measuring heart rate, not only can judge whether drunk driving or fatigue driving, it is also foreseen that potential disease, now chaufeur is no longer applicable to steering vehicle, reminds chaufeur to examination in hospital and locked driving engine No starting.
Accompanying drawing explanation
Fig. 1 is circuit structure diagram of the present invention;
Fig. 2 is method flow diagram of the present invention.
Detailed description of the invention
A kind of method for limiting of the restraint device of drunk driving or fatigue driving that prevents is the part of 9 and the touching such as 3 positions finger or palm on the steering wheel, configuration use the light emitting module of green LED and use phototransistor etc. by optical module, the haemoglobin in blood is utilized easily to absorb the green characteristic waiting the light of specific wavelength, finger is irradiated by green LED, because content of hemoglobin in blood during heartbeat increases, green light is absorbed, its reflected light light medium green coloured light weakens, transistor experiences the change of reflected light by optical module, producing peak value is negative impulse singla, this impulse singla is through low-pass filter, impedance inverter circuit, inverting amplifier, integrating circuit and hysteresis comparator, producing amplitude is positive rectangular pulse signal, the timer function of micro controller system is had to measure the adjacent time gap of beating for twice of heart, thus detect heart rate.
When chaufeur is into the car and in opening vehicle after power supply, driving circuit is the DC point that the light emitting module of green LED and phototransistor light module installation one are suitable, provides suitable drive current.Due under normal circumstances, the heart rate range of people is 60-100 beat/min, and that is heart rate frequency scope is about 1-1.67 hertz, therefore adopt a cutoff frequency be in the passband of 5 hertz the most smooth low-pass filter by power frequency 50 hertz and other interfering signal filtering.The input impedance of signal amplifier converts by impedance inverter circuit, makes it and the matches impedances of transistor by optical module, so just can meet the requirement of the most smooth low-pass filter in design passband.Amplifier is integrated computation inverting amplifier, amplifies received reflected light signal.Because heart is often beated once, be attended by principal earthquake and move peak and secondary undulation peak, reflected light also will change thereupon, in order to eliminate the impact that secondary undulation peak produces reflected light, an integrating circuit was designed before shaping circuit, and suppress less vibration submaximum on the impact of reflected light by larger time constant, afterwards, obtaining peak value by hysteresis comparator is positive rectangular pulse signal.Utilize the time gap between adjacent two pulses of the timing function of micro controller system mensuration, namely the cycle T of heart rate, utilizes f=1/T, obtains the frequency of heart rate, and the heart rate of per minute is 60*f.So in a short period of time, by measuring the time gap that heart is beated for twice, heart rate can be measured.If heart rate is normal, micro controller system sends signal to engine control circuit, heart rate display circuit and prompting sound circuit simultaneously, heart rate display circuit display heart rate value, prompting sound circuit prompting heart rate is normal, can start the engine, engine control circuit then allows ignition signal to pass through this circuit, start the engine.Otherwise if measure heart rate mal, heart rate display circuit display heart rate value, prompting sound circuit prompting heart rate mal, can not start the engine, and engine control circuit does not then allow ignition signal to pass through this circuit, locked driving engine.Meanwhile, prompting sound circuit reminds chaufeur, and if not fatigue driving or drunken driving, suggestion chaufeur carries out health examination, gets rid of disease risk.
In vehicle travel process, for ensureing to carry out dynamic monitoring to the heart rate of chaufeur, send an alerting signal to voice warning circuit every 20 minutes micro controller systems, prompting chaufeur hand is placed on light emitting module and phototransistor carries out once heart rate measurement by optical module.If it is normal to measure heart rate, while carrying out heart rate display, voice message chaufeur can normal driving, and engine control circuit allows normal working of engine; If measure heart rate mal, while carrying out heart rate display, voice message Variation of Drivers ' Heart Rate mal, within 20 minutes, rear engine control circuit will kill engine, chaufeur must be had a rest, and this time of 20 minutes is to allow chaufeur look for a suitable place to have a rest.If after the alerting signal that micro controller system sends to voice warning circuit, heart rate signal is not detected in 5 minutes, then send another voice reminder signal to voice warning circuit again by micro controller system, chaufeur 20 minutes rear engine control circuits are reminded to kill engine, chaufeur must be had a rest, and this time of 20 minutes is to allow chaufeur look for a suitable place to have a rest equally.
Claims (3)
1. one kind prevents the restraint device of drunk driving or fatigue driving, it is characterized in that: comprise driving circuit, green LEDs module, phototransistor is by optical module, low-pass filter, impedance inverter circuit, signal amplifier, integrating circuit, hysteresis comparator, micro controller system, engine control circuit, heart rate display, driving circuit drives by optical module green LEDs module and phototransistor, and to green LEDs module and phototransistor light module for power supply, green LEDs module and phototransistor are by the adjacent setting of optical module on the steering wheel, phototransistor by optical module successively with low-pass filter, impedance inverter circuit, signal amplifier, integrating circuit, hysteresis comparator and micro controller system connect, mouth connecting engine control circuit and the heart rate display respectively of micro controller system.
2. a kind of method for limiting preventing the restraint device of drunk driving or fatigue driving as claimed in claim 1:
Step one, when chaufeur into the car and in opening vehicle after power supply, driving circuit is the DC point that green LEDs module and phototransistor light module installation one are suitable, and provides drive current;
Step 2, finger or palm touchs several green LEDs module of distributing on the steering wheel and phototransistor is subject to optical module, with green LEDs module radiates finger or palm, phototransistor receives the reflected light that finger or palm reflect by optical module, the reflected light of collection is converted into reflected light signal by optical module by phototransistor, reflected light signal passes through low-pass filter, impedance inverter circuit, signal amplifier, integrating circuit, hysteresis comparator enters micro controller system, micro controller system measures heart rate according to the change of reflected light signal, a heart rate measurement is carried out to chaufeur in interval at regular intervals, when institute's heart rate measuring be greater than 100 beats/min or be less than 60 beats/min time, micro controller system to be automatically locked vehicle by engine control circuit, forbid engine starting, and show heart rate information by heart rate display.
3. a kind ofly as claimed in claim 2 prevent the method for limiting of the restraint device of drunk driving or fatigue driving: after described heart rate display starts and exceeds 4 hours, the alarm that prompting chaufeur is had a rest will be sent.
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| CN201510173450.5A CN104875617A (en) | 2015-04-13 | 2015-04-13 | Limiting device and limiting method for preventing drunk driving or fatigue driving |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105286873A (en) * | 2015-10-28 | 2016-02-03 | 东软熙康健康科技有限公司 | Drinking behavior recognition method and device and intelligent equipment |
| CN106308768A (en) * | 2016-08-31 | 2017-01-11 | 珠海市梦心科技发展有限公司 | Wristwatch capable of reminding of alcohol amount |
| CN106618543A (en) * | 2016-08-31 | 2017-05-10 | 珠海市梦心科技发展有限公司 | Drinking capacity reminding method and wearable device |
| CN109009018A (en) * | 2018-07-04 | 2018-12-18 | 惠州市德赛西威汽车电子股份有限公司 | A kind of Vehicular human health monitoring method and its system |
| CN110667595A (en) * | 2019-10-14 | 2020-01-10 | 深圳迈睿智能科技有限公司 | Monitoring method and monitoring system for physical state of vehicle driver |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105286873A (en) * | 2015-10-28 | 2016-02-03 | 东软熙康健康科技有限公司 | Drinking behavior recognition method and device and intelligent equipment |
| CN106308768A (en) * | 2016-08-31 | 2017-01-11 | 珠海市梦心科技发展有限公司 | Wristwatch capable of reminding of alcohol amount |
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| CN110667595A (en) * | 2019-10-14 | 2020-01-10 | 深圳迈睿智能科技有限公司 | Monitoring method and monitoring system for physical state of vehicle driver |
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