CN106448060A - Fatigue driving alarm device and alarm method - Google Patents
Fatigue driving alarm device and alarm method Download PDFInfo
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- CN106448060A CN106448060A CN201610863557.7A CN201610863557A CN106448060A CN 106448060 A CN106448060 A CN 106448060A CN 201610863557 A CN201610863557 A CN 201610863557A CN 106448060 A CN106448060 A CN 106448060A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/06—Alarms for ensuring the safety of persons indicating a condition of sleep, e.g. anti-dozing alarms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/02—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
- B60K28/06—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to incapacity of driver
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses a fatigue driving alarm device and alarm method, and belongs to the field of automobile driving alarm. The alarm device comprises a left skin resistance collection module, a left skin temperature collection module, a right skin resistance collection module, a right skin temperature collection module, a left skin resistance constant current source, a left skin temperature constant current source, a right skin resistance constant current source, a right skin temperature constant source, a left skin resistance sampling circuit, a left skin temperature sampling circuit, a right skin resistance sampling circuit, a right skin temperature sampling circuit, a single-chip microcomputer, an alarm module, and a power supply. The device collects the skin resistance and skin temperature signals of the left and right hands, holding a steering wheel, of a driver, converts the skin resistance and skin temperature signals into voltage signals, carries out the averaged statistics of the skin resistance and skin temperature signals in a preset time period, judges the fatigue features of the driver according to the change conditions of statistical values, starts the alarm module, solves problems that a conventional fatigue driving alarm device is not stable and accurate, is strong in anti-interference capability, is accurate in collected data, is accurate in judgment of fatigue features, and is wide in application range.
Description
Technical field
The invention belongs to car steering alarm field is and in particular to a kind of fatigue in driving procedure and drive to driver
After sailing state and the alarm device of alarm and alarm method.
Background technology
Fatigue driving is always the highway killer of the mankind, the traffic thing being occurred because of fatigue driving according to correlation study, modern times
Therefore accounted for the 20% of whole vehicle accidents, especially big vehicle accident even more accounts for 40% ratio, these vehicle accidents are led
Substantial amounts of property loss and casualties are caused, therefore how the degree of fatigue in driving procedure is supervised to vehicle driver
Survey, and pointed out in time and effectively and early warning, become an important topic reducing Modern Traffic accident rate.
The research and development of the following aspects is primarily present at present on this problem：
1st, human body physiological characteristics aspect：Mainly study the ANOMALOUS VARIATIONS of brain wave, biological skin electricity and pulse etc., such as China's patent
Disclosed in numbers 200610005069.9 patent of invention, a kind of operation indicates system, and it is exactly using exploring block detection operator
Physiological situation, the physiological condition value then being detected in fatigue strength judging part with storage reference value compared with, from
And judging the fatigue strength of operator, the shortcoming of this kind of method is the impact to body physiological state for the difference of environment and human body individual character
Very greatly it is easy to produce tired interference signal, thus leading to judged result inaccurate, often there is the situation of false alarm.
2nd, human body skin body variation characteristic aspect：Mainly study the ANOMALOUS VARIATIONS of human body skin body, such as China's patent No.
A kind of fatigue-driving detection technology disclosed in 200610007961.0 patent of invention, it is exactly to be detected by distance detector
Whether driver head there is reclinate situation, to judge whether driver is dozing off with this, the shortcoming of this kind of method
It is easily to produce false alarm and report to the police not in time, because driver not merely can head be bent downwardly when dozing off, when driving
The person of sailing wants to loosen lower and twists and be just also easy to produce false alarm during head, and until driver drowsy degree to head has stooped
Just report to the police may be too late it is impossible to play and alarm effect.
3rd, automobilism characteristic aspect：Mainly study the ANOMALOUS VARIATIONS situation of automobilism, such as China's patent No.
A kind of caution device of the fatigue driving motor vehicles disclosed in 200610124441.8 patent of invention, it is exactly using passing through
Judge that to be whether " S " type to judge whether driver is in fatigue driving state for the track of automobilism, but this method exists
Road surface inherently " S " type when be just also easy to produce false alarm, and the situation narrow on road surface occurs and reports to the police not in time
Situation.
4th, driving time characteristic aspect：Mainly record driving time sees whether overtime, such as China's patent No.
When just there is inside a kind of automobile information test control device that 200420097002.9 patent of invention is announced continuous driving
Between clocking capability, reported to the police when continuous driving time exceedes Preset Time, but this kind of method substantially excessively machinery, because driving
The time of sailing exceeds schedule time and does not necessarily mean that driver is tired, so easily false alarm occurs, and also this
Mode significant discomfort closes the situation needing long-distance driving, and the suitability is not strong.
5th, driving habit and human-body biological skin Electrical change characteristic aspect：Mainly research driver's both hands are held on steering wheel
The change of the two interelectrode human-body biological skin resistance matching with both hands, as China's patent No. 200710050128.9, institute is public
A kind of alarming method for fatigue drive of car of cloth, it is using timer, both hands to be held with steering wheel time-out to report to the police, and, adopts meanwhile
Timer rises counting overload alarm to both hands in two electrode mesothelium resistance, and the combination of timer and enumerator warning is
The feature of the method, but this method only holds the driver of steering wheel driving effectively to both hands, the department to custom one hand drive
Machine is invalid, due to both hands hold steering wheel driving time different because of the custom of driver, to timer expired time of fire alarming not
Good determination；Two interelectrode skin resistance that enumerator is held to both hands on steering wheel rise overload alarm, and hyperhidrosis few to antiperspirant
Driver invalid, work as cold weather, the palm of the hand is dried, after both hands and electrode contact, contact resistance slowly declines, human-body biological skin electricity
Change be capped, work as heat, palm of the hand hyperhidrosis, spirituality perspiration is flooded by warm property perspiration, and enumerator will cannot get people
The change of body biological skin electricity；Because the method only has a kind of constant current ource electric current, larger to human body skin resistance under various circumstances
Change, it is impossible to automatically adjust electric current, causes skin resistance resolution low, or even can not differentiate.This method is fitted in actual use
The crowd answering is restricted, affected by environment larger, and warning accuracy rate is not high, and the suitability is not strong.
For the research method of several aspects above, the monitoring mode of fatigue driving is summarized as 3 kinds, the first is human body
Biological response monitoring mode, as 1 class above；Second is driving habit monitoring mode, such as 2,3 and 4 class above；The third is
The monitoring mode that human-body biological sensing is combined with driving habit, as 5 classes above.Conclude above 3 kinds of modes, first kind of way
Affected by environment and individual difference very big, easily produce interference and affect accuracy and the practicality monitored, the second way
Affected greatly by driver's individual difference and subjective will, excessively machinery, easily the problems such as the fatigue diagnosis of appearance mistake, the third
Mode is mode practical at present, but, nor the problem being fully solved the first and second way presence.
Content of the invention
For above-mentioned technical problem, the present invention provides a kind of fatigue driving alarm device, and this alarm device is not subject to
The impact of weather, human body individual variation and driver's subjective consciousness, can reach the purpose promptly and accurately reported to the police.
In order to reach goal of the invention, the technical solution used in the present invention is：A kind of fatigue driving alarm device, its feature exists
In including left skin resistance acquisition module, left skin temperature acquisition module, right skin resistance acquisition module, right skin temperature acquisition module, the resistance constant current of left skin
Source, left skin temperature constant-current source, right skin resistance constant-current source, right skin temperature constant-current source, left skin resistance sample circuit, left skin temperature sample circuit, right skin
Resistance sample circuit, right skin temperature sample circuit, single-chip microcomputer, alarm module and power supply；
Described left skin hinders acquisition module and right skin hinders left hand holding position and the right side that acquisition module is separately mounted to vehicle steering
Handle and hold position, for gathering left hand skin resistance signal and the right hand skin resistance signal of driver；Described left skin hinders acquisition module
Outfan and left skin hinder the input of sample circuit and be connected, the outfan that described left skin hinders sample circuit is connected with single-chip microcomputer
Connect；The outfan that described right skin hinders acquisition module is connected with the input of right skin resistance sample circuit, described right skin resistance sampling electricity
The outfan on road is connected with single-chip microcomputer；
The left hand that described left skin temperature acquisition module and right skin temperature acquisition module are separately mounted to vehicle steering holds position and the right side
Handle and hold position, for gathering left hand skin temperature signal and the right hand skin temperature signal of driver；Described left skin temperature acquisition module
Outfan be connected with the input of left skin temperature sample circuit, the outfan of described left skin temperature sample circuit is connected with single-chip microcomputer
Connect；The outfan of described right skin temperature acquisition module is connected with the input of right skin temperature sample circuit, described right skin temperature sampling electricity
The outfan on road is connected with single-chip microcomputer；
Described power supply hinders constant-current source, right skin temperature constant-current source, single-chip microcomputer with left skin resistance constant-current source, left skin temperature constant-current source, right skin respectively
It is connected with alarm module；
Described single-chip microcomputer also hinders constant-current source, right skin temperature constant-current source and report with left skin resistance constant-current source, left skin temperature constant-current source, right skin respectively
Alert module is connected；
The outfan that described left skin hinders constant-current source is connected with the input of left skin resistance harvester；The output of left skin temperature constant-current source
End is connected with the input of left skin temperature harvester；Right skin hinders the outfan of constant-current source and right skin hinders the input of harvester
It is connected；The outfan of right skin temperature constant-current source is connected with the input of right skin temperature harvester.
Here, the skin resistance of this fatigue driving alarm device energy accurate acquisition driver and skin temperature signal, and be converted to
Voltage signal, by voltage signal sample analysis, statistical computation, judging the tired situation of driver, enabling to driver
Accurate warning during fatigue driving.
More preferably, described left skin resistance acquisition module and right skin resistance acquisition module are all by two width and length identical list
The bipolar electrode of electric level composition.
Here, measure the skin resistance of handss using bipolar electrode, metering system is simple, and test result is accurate.
More preferably, described left skin temperature acquisition module and right skin temperature acquisition module are all by 2 or 2 temperatures above induction apparatuss
The temperature inductor group being composed in series.
Here, it is composed in series temperature inductor group using multiple temperature inductors it is ensured that at least one temperature inductor
The handss temperature signal of driver can be collected.
More preferably, described left skin resistance acquisition module, left skin temperature acquisition module, right skin resistance acquisition module and right skin temperature collection mould
Block is embedded on steering wheel cover for automobile or on steering wheel.
Present invention also offers a kind of alarming method for fatigue drive is it is characterised in that comprise the following steps：
（1）Statistics timer starts timing；
（2）The left hand skin resistance signal of collection driver, left hand skin temperature signal, right hand skin resistance signal and right hand skin temperature letter
Number；
（3）By the left hand collecting skin resistance signal, left hand skin temperature signal, right hand skin resistance signal and right hand skin temperature signal
Corresponding continuous voltage signal S1, S2, S3, S4 is converted to after sample circuit；Described S1 and S3 is with the increasing of skin resistance signal
Big and reduce or the reduction with skin resistance signal and increase, S2 and S4 increases and increases or with skin temperature with skin temperature signal
Spend the reduction of signal and reduce；
（4）The transient voltage value of collection S1 and S3, and compared with preset standard magnitude of voltage Vs, if any one voltage in S1 and S3
When value is more than Vs, sampling timer starts timing；
（5）Judging to sample whether timer reaches T1 default sample time, if not reaching T1 sample time, monitoring S1 and S3
Magnitude of voltage, if any one magnitude of voltage changes in S1 and S3, from changing to less than Vs or from changing less than Vs more than Vs
To during more than Vs, sampling timer resets, and enters step（4）；If reaching T1 sample time, enter step（6）；
（6）Continuous voltage signal S1, S2, S3, S4 are sampled, obtain one group of corresponding transient voltage value V1S, V2S, V3S,
V4S；
（7）One group of transient voltage value V1S, V2S obtaining, V3S, V4S are processed through comparing process and selection, obtains this and take
Effective skin resistive voltage value VR of of sample and effective skin temperature voltage value VT simultaneously store；Described compare process and selection at
Reason step includes：
A, the value of V1S and V3S and Vs are compared, if any one magnitude of voltage is more than Vs in V1S and V3S, enter step B；
If the value of V1S and V3S is respectively less than Vs, V1S, V2S, V3S, V4S value is 0, VR and VT value is 0 and stores；
B, the value of V1S and V3S is compared, if V1S value is more than 0, V3S value equal to 0, then takes V1S value for the VR of this sub-sampling
Value, takes V2S value for the VT value of this sub-sampling；If V1S value is equal to 0, V3S value is more than 0, then take V3S value for the VR value of this sub-sampling,
Take V4S value for the VT value of this sub-sampling；If V1S value is more than 0, V3S value more than 0, then the little value of magnitude of voltage in V1S and V3S is taken to be
The VR value of this sub-sampling, the value taking magnitude of voltage in V2S and V4S big is the VT value of this sub-sampling；VR and VT value is stored；
（8）Judge whether the timing period T2 counting timer arrives, if timing period T2 does not arrive, enter step（5）If, meter
When period T2 arrive, enter step（9）；
（9）Effective skin resistive voltage value of the multiple non-zeros in timing period T2 memory storage is averaged, obtains one averagely
Skin resistive voltage value simultaneously stores, and effective skin temperature voltage value of the multiple non-zeros in timing period T2 memory storage is averaged,
Obtain an average skin temperature degree magnitude of voltage and store；
（10）Judge whether the average skin resistive voltage value number of storage or average skin temperature degree magnitude of voltage number reach n, if
Not up to n, then the clearing of statistics timer, enters step（1）If reaching n, enter step (11)；
（11）Before judgement, whether the average skin resistive voltage value of n or front n average skin temperature degree magnitude of voltage the feelings being continuously reduced
Condition, if occurring, enters step（12）；If not occurring, statistics timer resets, and enters step（1）；
（12）Send alarm signal, monitor the transient voltage value of S1 and S3 simultaneously；If any one magnitude of voltage becomes in S1 and S3
Change, from changing to less than Vs or when changing to more than Vs less than Vs more than Vs, report to the police and terminate, statistics timer resets, and enters
Enter step（1）.
More preferably, the method for described collection left hand skin resistance signal and right hand skin resistance signal is：Using constant-current source respectively
Adopt to the left skin resistance acquisition module being arranged on steering wheel left hand holding position and the right skin resistance being arranged on right hand holding position
Collection module two ends carry out being energized to gathering；
Described collection left hand skin temperature signal and the method for right hand skin temperature signal are：Using constant-current source respectively to being arranged on direction
Face left handle the left skin temperature acquisition module holding on position and be arranged on the right hand hold position on right skin temperature acquisition module two ends enter
Row energising is gathering.
More preferably, the output current of the described constant-current source for gathering left hand skin resistance signal and right hand skin resistance signal is big
Little can be adjusted according to the magnitude of voltage situation of S1 and S3 monitoring.
Here, this improved purpose is that the electric current of skin resistance constant-current source about the size adjustment according to skin resistance value is strong
Degree is so that the change of skin resistance value is easily noticeable.
More preferably, described step（12）Type of alarm be：
（1）Slight warning；
（2）After slightly being reported to the police, the voltage value changes of monitoring S1 and S3, in stipulated time section, if the magnitude of voltage of S1 and S3
Stablize interval less than Vs or stable more than Vs interval, carry out moderate warning；
（3）After carrying out moderate warning, the voltage value changes of monitoring S1 and S3, in stipulated time section, if the magnitude of voltage of S1 and S3
Stablize interval less than Vs or stable more than Vs interval, enter line height and report to the police.
Here, the rank of warning is refined, the different degree of fatigue of correspondence is reported to the police.This improves provides a people
Machine interaction test function, the quick degree of test driver current action reaction, if slightly fatigue in driver, slightly report
After police, if driver's movement response is fast, before moderate is reported to the police and arrived, can be unclamped with right-hand man or hold steering wheel, will report
Alert interruption；If moderate fatigue in driver, after moderate is reported to the police, if driver's movement response is fast, reports to the police in height and arrive
Before, can be unclamped with right-hand man or hold steering wheel, interrupt reporting to the police；If high cycle fatigue in driver, after height is reported to the police,
If driver's movement response is slow, after continuing highly to report to the police, can be unclamped with right-hand man or hold steering wheel, in reporting to the police
Disconnected；If after reporting to the police, driver does not have right-hand man to unclamp or holds steering wheel action, alarm will continue height and report to the police, until
Driver is waken up, and unclamps or holds steering wheel action with right-hand man and interrupt reporting to the police.By above interactive interruption warning function,
Realize waking up the purpose of driver.
The invention has the beneficial effects as follows：Compared with prior art, the present invention is according to driver's amount of sweat change and handss temperature on hand
Change can reflect the principle of driver fatigue situation, there is provided a kind of fatigue driving alarm device, and this alarm device passes through real
When collection driver right-hand man's skin resistance and skin temperature signal be converted to voltage signal, select right-hand man moment skin resistance and
Skin temperature voltage signal, carries out average statistics in the time period of regulation to skin resistive voltage and skin temperature voltage, according to statistical value
The fatigue characteristic to judge driver for the situation of change, enhance the capacity of resisting disturbance of alarm device, substantially increase collection number
According to accuracy and the accuracy differentiating fatigue characteristic, the left skin resistance constant-current source of this alarm device and right skin resistance constant-current source energy according to
Left skin hinders module and right skin hinder amount of sweat in module number automatically adjust and module hindered by left skin and right skin hinders the electric current in module
Size, makes left skin hinder module and right skin hinders the skin resistance fatigue feature that module presents and becomes apparent from, and substantially increases alarm device
Capacity of resisting disturbance；The interactive interruption of the action of handss and alarm signal is used to report to the police on the steering wheel by driver, simply cleverly
Achieve the wake-up to driver for the alarm device, substantially increase accuracy and the practicality of fatigue warning.Due to gathering
The skin resistance of left hand and the right hand and skin temperature signal, the present invention is suitable for all both at home and abroad drivers with different driving habits.
Brief description
Fig. 1 is the structural representation of fatigue driving alarm device embodiment 1 of the present invention；
Fig. 2 is the circuit diagram of fatigue driving alarm device embodiment 1 of the present invention；
Fig. 3 is the flow chart of alarming method for fatigue drive embodiment 2 of the present invention；
In figure is labeled as：The left skin of 1- hinders bipolar electrode, 2- left skin temperature induction apparatuss group, and the right skin of 3- hinders bipolar electrode, 4- right skin temperature induction apparatuss
Group, the left skin of 5- hinders constant-current source, 6- left skin temperature constant-current source, and the right skin of 7- hinders constant-current source, 8- right skin temperature constant-current source, 9- left skin resistance sampling electricity
Road, 10- left skin temperature sample circuit, the right skin of 11- hinders sample circuit, 12- right skin temperature sample circuit, 13- single-chip microcomputer, 14- warning mould
Block, 15- power supply.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and
It is not used in the restriction present invention.
The present invention is as follows to the judgement theoretical foundation of driver's whether fatigue driving：Inventor finds through experiment, drives
When driving, skin resistance on hand and skin temperature can change member with the change of the mental status of driver, when driver regains consciousness and high
When putting forth energy, antiperspirant on hand can increase and leads to skin resistance to reduce, and skin temperature increases, and when tired driver, antiperspirant on hand can reduce and leads to
Skin resistance increases, skin temperature drop, and this fatigue characteristic can not present moment, needs within the regular hour to several moments
Delta data is selected, counted and is calculated, and could clearly present.Introduction for making its present invention is more succinct, " skin electricity
Resistance " is referred to as " skin resistance ", and " skin temperature " is referred to as " Pi Wen ".
Embodiment 1：
As shown in Figure 1 and Figure 2, the invention provides a kind of fatigue driving alarm device, including the left side hindering acquisition module as left skin
Skin hinders bipolar electrode 1, the left skin temperature induction apparatuss group 2 as left skin temperature acquisition module, the right skin resistance pair as right skin resistance acquisition module
Electrode 3, the right skin temperature induction apparatuss group 4 as right skin temperature acquisition module, left skin resistance constant-current source 5, left skin temperature constant-current source 6, the resistance of right skin
Constant-current source 7, right skin temperature constant-current source 8, left skin resistance sample circuit 9, left skin temperature sample circuit 10, right skin resistance sample circuit 11, right skin
Warm sample circuit 12, single-chip microcomputer 13, alarm module 14 and power supply 15.
Left skin resistance bipolar electrode 1 and right skin resistance bipolar electrode 3 are separately mounted to vehicle steering left hand and hold position and right handgrip
Hold on position, for gathering left hand skin resistance signal and the right hand skin resistance signal of driver；Left skin hinders the outfan of bipolar electrode 1
The input hindering sample circuit 9 with left skin is connected, and the outfan that left skin hinders sample circuit 9 is connected with single-chip microcomputer 13, right skin
The input that outfan and the right skin of resistance bipolar electrode 3 hinders sample circuit 11 is connected, right skin hinder sample circuit 11 outfan and
Single-chip microcomputer 13 is connected.
Left skin temperature induction apparatuss group 2 and right skin temperature induction apparatuss group 4 are separately mounted to vehicle steering left hand and hold position and the right side
Handle and hold on position, for gathering left hand skin temperature and the right hand skin temperature of driver；The outfan of left skin temperature induction apparatuss group 2 with
The input of left skin temperature sample circuit 10 is connected, and the outfan of left skin temperature sample circuit 10 is connected with single-chip microcomputer 13, right skin
The outfan of warm induction apparatuss group 4 is connected with the input of right skin temperature sample circuit 12, the outfan of right skin temperature sample circuit 12
It is connected with single-chip microcomputer 13.
Power supply hinders constant-current source 5, left skin temperature constant-current source 6, right skin resistance constant-current source 7, right skin temperature constant-current source 8, list respectively with left skin
Piece machine 13 is connected with alarm module 14, for powering for whole fatigue driving alarm device.
Described single-chip microcomputer 13 also hinders constant-current source 5, left skin temperature constant-current source 6, right skin resistance constant-current source 7, left skin temperature respectively with left skin
Constant-current source 8 is connected with alarm module 14, for the program calculation of fatigue driving alarm device, timing, counting, judgement, control
And storage.
The outfan that left skin hinders constant-current source 5 is connected with the input of left skin resistance bipolar electrode 1, is responsible for the bipolar electrode of skin resistance to the left
1 power supply；The outfan of left skin temperature constant-current source 6 is connected with the input of left skin temperature induction apparatuss group 2, is responsible for skin temperature induction apparatuss to the left
Group 2 power supply；The outfan that right skin hinders constant-current source 7 is connected with the input of right skin resistance bipolar electrode 3, is responsible for the bipolar electrode of skin resistance to the right
3 power supplies；The outfan of right skin temperature constant-current source 8 is connected with the input of right skin temperature induction apparatuss group 4, is responsible for skin temperature induction apparatuss to the right
Group 4 power supply.
Left skin hinders bipolar electrode 1 and left skin temperature induction apparatuss group 2 is arranged on the left side of steering wheel；Right skin resistance bipolar electrode 3 and the right side
Skin temperature induction apparatuss group 4 is arranged on the right-hand part of steering wheel.
This fatigue driving alarm device may be mounted at steering wheel and puts, and the automobile being suitable for having dispatched from the factory uses；Also may be used
, in automobile making, equipment component to be arranged on above steering wheel, equipment component is arranged on inside instrumental panel, joins as new car
Set uses.
Embodiment 2：
As shown in figure 3, according to embodiment 1 fatigue driving device alarming method for fatigue drive, comprise the following steps that：
（1）The statistics timer of single-chip microcomputer starts timing.
（2）The left hand skin resistance signal of collection driver, left hand skin temperature signal, right hand skin resistance signal and right hand skin temperature
Degree signal.
The method that collection holds the resistance signal on the right-hand man of steering wheel, is to hinder constant-current source 5 and the resistance of right skin using left skin
Constant-current source 7 holds position to being arranged on steering wheel right-hand man（The half right and left of steering wheel）On the left skin of two detached bipolar electrodes
Resistance bipolar electrode 1 and right skin hinder bipolar electrode 3 to carry out being energized gathering.Left skin hinders bipolar electrode 1 and the electrode of right skin resistance bipolar electrode 3 is pressed
Rack RG be 2 millimeters with 3 millimeters of prescribed distance it is contemplated that the diameter of vehicle steering is different, left skin hinders bipolar electrode 1
Length RL be upper end 11 o'clock position on the steering wheel, lower end 7 o'clock position on the steering wheel, right skin hinders bipolar electrode 3
Length RL be upper end 1 o'clock position on the steering wheel, lower end 5 o'clock position on the steering wheel, when left hand or the right hand or
Hands grasping lives steering wheel, just can gather resistance signal to hand.And gather the temperature signal holding on steering wheel right-hand man
Method, be to hold position to being arranged on steering wheel right-hand man respectively using left skin temperature constant-current source 6 and right skin temperature constant-current source 8（Side
Half right and left to disk）On left skin temperature induction apparatuss group 2 and right skin temperature induction apparatuss group 4 carry out being energized gathering, left skin warming
Device group 2 and right skin temperature induction apparatuss group 4 is answered to be all to be in series for 5 temperature inductors by specified quantity TG, left skin temperature induction apparatuss
5 temperature inductors of group 2 are respectively mounted the position at 7,8,9,10,11 o'clock on the steering wheel, and the 5 of right skin temperature induction apparatuss group 4
Individual temperature inductor is separately mounted to the position at 1,2,3,4,5 o'clock of steering wheel, and ordinary circumstance, when left hand or the right hand hold direction
During disk, always hold the temperature inductor of 1 about, when left hand or the right hand or two-handed hand-held steering wheel, just can gather in one's hands
On temperature signal.
（3）By the left hand collecting skin resistance signal, left hand skin temperature signal, right hand skin resistance signal and right hand skin temperature
Signal hinders sample point road 9, left skin temperature sample circuit 10, right skin resistance sample circuit 11, right skin temperature sample circuit respectively through left skin
Corresponding continuous voltage signal S1, S2, S3, S4 is converted to after 12；Described S1 and S3 reduce with the increase of skin resistance signal or
Person increases with the reduction of skin resistance signal, S2 and S4 increases and increase or the fall with skin temperature signal with skin temperature signal
Low and reduce.
Resistance signal and temperature signal are converted into voltage signal, can be using sample circuit by continuous resistance signal
It is converted into continuous voltage signal S1, S2, S3, S4, due to a termination power of skin resistance bipolar electrode and skin temperature inductor group
Positive pole, is constant high voltage, the left skin resistance sample circuit 9 of the present invention, left skin temperature sample circuit 10, right skin resistance sample circuit
11st, right skin temperature sample circuit 12 can only take relatively low voltage from the other end of skin resistance and skin temperature, flows to skin resistance and skin
The constant current of temperature is to flow to low-voltage end from high voltage end, left skin resistance sample circuit 9, left skin temperature sample circuit 10, right skin
The voltage that resistance sample circuit 11, right skin temperature sample circuit 12 are taken is voltage difference S1, S2 of opposed power negative pole, S3, S4, skin electricity
Resistance is bigger, and sampling voltage is less, and skin temperature is higher（Temperature inductor resistance is less）, sampling voltage is bigger, conversely, skin resistance is got over
Little, sampling voltage is bigger, and skin temperature is lower（Temperature inductor resistance is bigger）, sampling voltage is less, due to taking of the present invention
The sample point of sample circuit is with respect to power cathode voltage, so as Fig. 2, left skin resistance bipolar electrode 1, left skin temperature induction apparatuss group 2,
Right skin resistance bipolar electrode 3 and right skin temperature induction apparatuss group 4 are to be connected on left skin resistance constant-current source 5, left skin temperature constant-current source 6, right skin accordingly
In the outlet line of resistance constant-current source 7 and right skin temperature constant-current source 8, according to Ohm's law and series circuit computing formula, sampling voltage
For：
S1=VE-R1 × I1, VE are constant supply voltage, and R1 is the left hand skin resistance value that left skin hinders change between bipolar electrode 1, I1
Constant current for constant-current source 1 output；
S2=VE-R2 × I2, VE are constant supply voltage, and R2 is the resistance that left skin temperature induction apparatuss group 2 senses the output of left hand skin temperature
Value, temperature raises, and the resistance of left skin temperature induction apparatuss group 2 output is less, temperature drop, the resistance of left skin temperature induction apparatuss group 2 output
Bigger, I2 is the constant current of constant-current source 2 output；
S3=VE-R3 × I3, VE are constant supply voltage, and R3 is the right hand skin resistance value that right skin hinders change between bipolar electrode 3, I3
Constant current for constant-current source 3 output；
S4=VE-R4 × I4, VE are constant supply voltage, and R4 is the resistance that right skin temperature induction apparatuss group 4 senses the output of right hand skin temperature
Value, temperature raises, and the resistance of right skin temperature induction apparatuss group 4 output is less, temperature drop, the resistance of right skin temperature induction apparatuss group 4 output
Bigger, I4 is the constant current of constant-current source 4 output.
So, show, resistance is bigger from above formula and explanation, voltage is less, conversely, resistance is less, voltage is bigger.This
S1, S2, S3, S4 voltage acquired by sample circuit of invention and skin resistance and Pi Wen are entirely linear relationship, and sampling voltage is complete
All-round actual response skin resistance and the change of skin temperature.
（4）The transient voltage value of collection S1 and S3, and compared with preset standard magnitude of voltage Vs, if in S1 and S3 any one
When magnitude of voltage is more than Vs, sampling timer starts timing.
When left hand and the right hand unclamp steering wheel, S1 and S3 is stable to be lied prostrate in low voltage value 0-0.5, when left hand and the right hand hold
During steering wheel, S1 and S3 is stable, and in high-voltage value 1.2-3 volt, preset standard magnitude of voltage Vs is 0.5 volt, when judging left hand or the right hand
When whether holding steering wheel, see whether voltage signal S1 and S3 on right-hand man is higher than preset standard magnitude of voltage Vs, when voltage letter
When number S1 and S3 is less than or equal to 0.5 volt, illustrate that right-hand man have left steering wheel.
（5）Judge to sample whether timer reaches T1 default sample time（8 seconds）If not reaching T1 sample time（8
Second）, then monitor the magnitude of voltage of S1 and S3, if any one magnitude of voltage changes in S1 and S3, from changing to less than Vs more than Vs
Or when changing to more than Vs less than Vs, sampling timer resets, and enters step（4）；If reaching T1 sample time, enter
Step（6）.
（6）Continuous voltage signal S1, S2, S3, S4 are sampled, one group of corresponding transient voltage value V1S, V2S of acquisition,
V3S、V4S.
The purpose of this step is that analog voltage signal S1, S2, S3, S4 are input to the ADC of single-chip microcomputer 13（Simulation numeral turns
Parallel operation）Port PF0, PF1, PF2 and PF3, such as Fig. 2, it is converted into digital voltage and is analyzed, judge whether driver is likely to be at
Fatigue state.
When only left hand holds steering wheel, be judged as the voltage signal S1 that left hand holds end, when S1 is higher than Vs if enter
Row sampling；When the only right hand holds steering wheel, be judged as the voltage signal S3 that the right hand holds end, when S3 is higher than Vs if carry out
Sampling；When left hand and the right hand hold steering wheel simultaneously, it is judged as left hand and whether holds the voltage signal S1 at end higher than preset standard
Magnitude of voltage Vs, meanwhile, judges whether the voltage signal S3 that the right hand holds end is higher than preset standard magnitude of voltage Vs, if S1 is higher than Vs
Or S3 is just sampled when being higher than Vs.
Left skin hinders constant-current source 5 and right skin hinders totally 4 grades of the current gear of constant-current source 7, and initial current is 1 grade, and electric current is 0.5 micro-
Peace, shelves are higher, and electric current is bigger, and 2 grades of electric currents are 3 microamperes, and 3 grades of electric currents are 11 microamperes, and 4 grades of electric currents are 17 microamperes, judge right-hand man
On voltage signal S1 or S3 be higher than whether 2.4 volts of assigned voltage, if voltage signal S1 or S3 is in 10 seconds time periods of regulation
It is higher than persistently inside 2.4 volts of assigned voltage, left skin resistance constant-current source 5 and right skin resistance constant-current source 7 electric current all rise a gear, about judging
Whether voltage signal S1 and S3 on hand is less than 1 volt of assigned voltage, if voltage signal S1 and S3 is in 10 seconds time periods of regulation
Inside it is consistently less than 1 volt of assigned voltage, left skin resistance constant-current source 5 and right skin resistance constant-current source 7 electric current all decline a gear；If on right-hand man
Voltage signal S1 or S3 be higher than persistently 2.4 volts of assigned voltage within 10 seconds time periods of regulation, and S1 and S3 do not have
It is consistently less than 1 volt of assigned voltage, then the gear at constant-current source 5 and constant-current source 7 place keeps constant, electric current keeps constant.
It is known that perspiration on hand is more, its skin resistance is less, otherwise its skin resistance is bigger.More than perspiration on hand
When, the changing value of skin resistance is very little, and when handss are done, the changing value of skin resistance is again very big.If all using same
The left skin resistance constant-current source 5 of sample and right skin resistance constant-current source 7 electric current, will certainly lead to perspiration voltage signal of many whens S1 and S3 on hand
Change is difficult to discover, and when perspiration is few on hand, voltage signal S1 and S3 change is excessive.
The change realizing constant current ource electric current is to be input to by the analog voltage that port PE3, PE4 of single-chip microcomputer 13 export respectively
Left skin hinders constant-current source 5 and right skin hinder operational amplifier U1A and U1C in constant-current source 7 just（+）Input port, such as Fig. 2, control left
Skin hinders constant-current source 5 and right skin hinders output current I1 and the I3 size of constant-current source 7, and the analog voltage of PE3, PE4 output is bigger, left skin
Electric current I1 and I3 of resistance constant-current source 5 and resistance constant-current source 7 output of right skin is bigger, and the analog voltage of PE3, PE4 output is less, left skin resistance
Electric current I1 and I3 of constant-current source 5 and resistance constant-current source 7 output of right skin is less.Analog voltage by the port PE5 output of single-chip microcomputer 13
Just it is input simultaneously in left skin resistance constant-current source 5 and right skin resistance constant-current source 7 operational amplifier U1B and U1D（+）Input port, controls
I2 the and I4 electric current of left skin temperature constant-current source 6 and right skin temperature constant-current source 8 is 10 microamperes, and the voltage of PE5 output is constant voltage.
Determine whether whether voltage signal S1 or S3 is higher than persistently rule in 10 seconds time periods of regulation using single-chip microcomputer 13
Determine 2.4 volts of voltage（I.e. perspiration is many on hand, and skin resistance value is little, the big situation of sampling voltage）, if it is, just increasing left skin resistance constant current
Source 5 and right skin hinder constant-current source 7 and are supplied to the electrode 1 of collection right-hand man's resistance signal and the electric current of electrode 3 so that the resistance of left skin samples
The amplification of circuit 9 and right skin resistance sample circuit 11 increases, and left skin resistance sample circuit 9 and right skin hinder sample circuit 11 sensitivity
Improve.If voltage signal S1 and S3 is consistently less than 1 volt of assigned voltage in 10 seconds time periods of regulation（I.e. perspiration is few on hand, skin
Resistance value is big, the little situation of sampling voltage）, it is reduced by left skin resistance constant-current source 5 and right skin resistance constant-current source 7 is supplied to collection right-hand man
The left skin of resistance signal hinders bipolar electrode 1 and right skin hinders the electric current of bipolar electrode 3 so that left skin resistance sample circuit 9 and the resistance of right skin sample
The amplification of circuit 11 reduces, and left skin resistance sample circuit 9 and right skin hinder sample circuit 11 sensitivity decrease.If voltage signal
S1 or S3 is not persistently consistently less than regulation electricity higher than 2.4 volts and S1 and S3 of assigned voltage in 10 seconds time periods of regulation
Press 1 volt, then left skin resistance constant-current source 5 and right skin resistance constant-current source 7 electric current keep constant.
Left skin resistance constant-current source 5 and right skin resistance constant-current source 7 are supplied to and are arranged on two separation on steering wheel right-hand man holding end
Bipolar electrode（Left skin resistance bipolar electrode 1 and right skin resistance bipolar electrode 3）Electric current change with the change of skin resistance value, the perspiration of handss is got over
Many, resistance is less, and the electric current providing is bigger, conversely, handss are drier, resistance is bigger, and the electric current providing is less, so, adopts
Collect that left skin hinders bipolar electrode 1 and right skin hinders the change of right-hand man's resistance on bipolar electrode 3 and just compares equilibrium and substantially, it is to avoid handss are dried electricity
Resistiveization is excessive or the many resistance variations of hand perspiration are too small it is ensured that the precision equilibrium of collection is accurate.
（7）One group of transient voltage value V1S, V2S obtaining, V3S, V4S are processed through comparing process and selection, obtains this
Effective skin resistive voltage value VR of of sub-sampling and effective skin temperature voltage value VT simultaneously store；Described compare process and select
Select process step to include：
A, the value of V1S and V3S and Vs are compared, if any one magnitude of voltage is more than Vs in V1S and V3S, enter step B；
If the value of V1S and V3S is respectively less than preset voltage value, V1S, V2S, V3S, V4S value is 0, VR and VT value is 0 and stores；
B, the value of V1S and V3S is compared, if V1S value is more than 0, V3S value equal to 0, then takes V1S value for the VR of this sub-sampling
Value, takes V2S value for the VT value of this sub-sampling；If V1S value is equal to 0, V3S value is more than 0, then take V3S value for the VR value of this sub-sampling,
Take V4S value for the VT value of this sub-sampling；If V1S value is more than 0, V3S value and is more than 0, then take magnitude of voltage in V1S value and V3S value little
It is worth the VR value for this sub-sampling, take the VT value that the big value of magnitude of voltage in V2S value and V4S value is this sub-sampling；VR and VT value is deposited
Storage.
（8）Judge the timing period T2 of statistics timer（5 minutes）Whether arrive, if timing period T2（5 minutes）Do not arrive,
Then enter step（5）If, timing period T2（5 minutes）Arrive, enter step（9）.
（9）Will be in timing period T2（5 minutes）Effective skin resistive voltage value of multiple non-zeros of memory storage is averaged, and obtains
Obtain an average skin resistive voltage value and store, by timing period T2（5 minutes）Effective skin temperature of multiple non-zeros of memory storage
Magnitude of voltage is averaged, and obtains an average skin temperature degree magnitude of voltage and stores.
（10）Judge whether the average skin resistive voltage value number of storage or the number of average skin temperature degree magnitude of voltage reaches 3
Individual, if not up to 3, statistics timer resets, and enters step（1）If reaching 3, enter step (11).
（11）Judge whether first 3 average skin resistive voltage values or front 3 average skin temperature degree magnitudes of voltage occur being continuously reduced
Situation, if occurred; would enter step（12）；If not occurring, statistics timer resets, and enters step（1）.
When the average skin resistive voltage value number of storage or the number of average skin temperature degree magnitude of voltage reach 3, then start
Carry out data analysiss, after being continuously reduced occur in current 3 average skin resistive voltage values or average skin temperature degree magnitude of voltage, then reported
Alert, report to the police and occur the 3rd statistical time range finish time.
（12）Send alarm signal, monitor the transient voltage value of S1 and S3 simultaneously；If any one magnitude of voltage is sent out in S1 and S3
Changing, from changing to less than Vs or when changing to more than Vs less than Vs more than Vs, reports to the police and terminates, statistics timer is clear
Zero, enter step（1）.
Warning is to control alarm module 14 to produce by output port PA0, PA1, PA2, PA3, PA4 of single-chip microcomputer 13, such as schemes
2, including strong voice reminder, flash of light, strength vibrations and chimes of doom.
In step (12), if reported to the police, slightly reported to the police first（Acousto-optic）；After slightly being reported to the police, if in regulation
In 10 seconds time periods, steering wheel holds the stable low voltage value interval when handss unclamp of voltage signal S1 or S3 at end or stablizes
Handling between the high voltage region handling steering wheel, carrying out moderate warning（Acousto-optic）；After carrying out moderate warning, if in the stipulated time
In section 10 seconds steering wheel hold end the stable low voltage value when handss unclamp of voltage signal S1 or S3 interval or stable in handss
Hold between the high voltage region of steering wheel, enter line height and report to the police（Continuous acousto-optic）.
If after warning, left hand or the right hand occur to hold or unclamp steering wheel, cause S1, S3 to be higher or lower than corresponding
Preset standard magnitude of voltage Vs（0.5 volt）Change, storage time of fire alarming and warning degree information, report to the police and interrupt, otherwise, alarm
Just send continuous height always to report to the police.
This improves provides a personal-machine interaction test function, the quick degree of test driver current action reaction, if
Slightly fatigue in driver, after slight warning sends, if driver's movement response is fast, before moderate is reported to the police and arrived, permissible
Unclamped with right-hand man or hold steering wheel, interrupt reporting to the police；If moderate fatigue in driver, moderate is reported to the police（Acousto-optic）Send
Afterwards, if driver's movement response is fast, before height is reported to the police and arrived, can be unclamped with right-hand man or hold steering wheel, will report to the police
Interrupt；If high cycle fatigue in driver, height is reported to the police after sending, if driver's movement response is slow, reports continuing height
After police, can be unclamped with right-hand man or hold steering wheel, interrupt reporting to the police；If after reporting to the police, driver does not have right-hand man to unclamp
Or holding steering wheel action, alarm will continue height and report to the police, and until driver is waken up, be unclamped with right-hand man or hold direction
Disk action is interrupted reporting to the police.
Present invention utilizes driver regains consciousness during driving, consciousness and movement response are quick, if alarm sends once in a while
False alarm, after slight warning, driver easily will hold rapidly or unclamp steering wheel interrupts false alarm；Driver is tired
When please sailing, the consciousness of driver occurred fuzzy clear, blunt, even do not hear slight acousto-optic prompting sound, movement response is slow, on hand
Do not hold or unclamp the conversion action of steering wheel, alarm will be further sent out moderate and continuous height acousto-optic report
Alert, hold or unclamp the action of steering wheel with handss until waking up driver, interrupt reporting to the police.
By the above interactive purpose interrupted warning function, realize waking up driver.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (8)
1. a kind of fatigue driving alarm device is it is characterised in that include left skin resistance acquisition module, left skin temperature acquisition module, right skin
Resistance acquisition module, right skin temperature acquisition module, left skin resistance constant-current source, left skin temperature constant-current source, right skin resistance constant-current source, right skin temperature constant current
Source, left skin resistance sample circuit, left skin temperature sample circuit, right skin resistance sample circuit, right skin temperature sample circuit, single-chip microcomputer, warning mould
Block and power supply；
Described left skin hinders acquisition module and right skin hinders left hand holding position and the right side that acquisition module is separately mounted to vehicle steering
Handle and hold position, for gathering left hand skin resistance signal and the right hand skin resistance signal of driver；Described left skin hinders acquisition module
Outfan and left skin hinder the input of sample circuit and be connected, the outfan that described left skin hinders sample circuit is connected with single-chip microcomputer
Connect；The outfan that described right skin hinders acquisition module is connected with the input of right skin resistance sample circuit, described right skin resistance sampling electricity
The outfan on road is connected with single-chip microcomputer；
The left hand that described left skin temperature acquisition module and right skin temperature acquisition module are separately mounted to vehicle steering holds position and the right side
Handle and hold position, for gathering left hand skin temperature signal and the right hand skin temperature signal of driver；Described left skin temperature acquisition module
Outfan be connected with the input of left skin temperature sample circuit, the outfan of described left skin temperature sample circuit is connected with single-chip microcomputer
Connect；The outfan of described right skin temperature acquisition module is connected with the input of right skin temperature sample circuit, described right skin temperature sampling electricity
The outfan on road is connected with single-chip microcomputer；
Described power supply hinders constant-current source, right skin temperature constant-current source, single-chip microcomputer with left skin resistance constant-current source, left skin temperature constant-current source, right skin respectively
It is connected with alarm module；
Described single-chip microcomputer also hinders constant-current source, right skin temperature constant-current source and report with left skin resistance constant-current source, left skin temperature constant-current source, right skin respectively
Alert module is connected；
The outfan that described left skin hinders constant-current source is connected with the input of left skin resistance harvester；The output of left skin temperature constant-current source
End is connected with the input of left skin temperature harvester；Right skin hinders the outfan of constant-current source and right skin hinders the input of harvester
It is connected；The outfan of right skin temperature constant-current source is connected with the input of right skin temperature harvester.
2. fatigue driving alarm device according to claim 1 is it is characterised in that described left skin hinders acquisition module and right skin
The bipolar electrode that resistance acquisition module is all made up of two width and length identical list electricity level.
3. fatigue driving alarm device according to claim 1 is it is characterised in that described left skin temperature acquisition module and right skin
Warm acquisition module is all the temperature inductor group being composed in series by 2 or 2 temperatures above induction apparatuss.
4. fatigue driving alarm device according to claim 1 is it is characterised in that described left skin hinders acquisition module, left skin
Warm acquisition module, right skin resistance acquisition module and right skin temperature acquisition module are embedded on steering wheel cover for automobile or on steering wheel.
5. a kind of alarming method for fatigue drive is it is characterised in that comprise the following steps：
（1）Statistics timer starts timing；
（2）The left hand skin resistance signal of collection driver, left hand skin temperature signal, right hand skin resistance signal and right hand skin temperature letter
Number；
（3）By the left hand collecting skin resistance signal, left hand skin temperature signal, right hand skin resistance signal and right hand skin temperature signal
Corresponding continuous voltage signal S1, S2, S3, S4 is converted to after sample circuit；Described S1 and S3 is with the increasing of skin resistance signal
Big and reduce or the reduction with skin resistance signal and increase, S2 and S4 increases and increases or with skin temperature with skin temperature signal
Spend the reduction of signal and reduce；
（4）The transient voltage value of collection S1 and S3, and compared with preset standard magnitude of voltage Vs, if any one voltage in S1 and S3
When value is more than Vs, sampling timer starts timing；
（5）Judging to sample whether timer reaches T1 default sample time, if not reaching T1 sample time, monitoring S1 and S3
Magnitude of voltage, if any one magnitude of voltage changes in S1 and S3, from changing to less than Vs or from changing less than Vs more than Vs
To during more than Vs, sampling timer resets, and enters step（4）；If reaching T1 sample time, enter step（6）；
（6）Continuous voltage signal S1, S2, S3, S4 are sampled, obtain one group of corresponding transient voltage value V1S, V2S, V3S,
V4S；
（7）One group of transient voltage value V1S, V2S obtaining, V3S, V4S are processed through comparing process and selection, obtains this and take
Effective skin resistive voltage value VR of of sample and effective skin temperature voltage value VT simultaneously store；Described compare process and selection at
Reason step includes：
A, the value of V1S and V3S and Vs are compared, if any one magnitude of voltage is more than Vs in V1S and V3S, enter step B；
If the value of V1S and V3S is respectively less than Vs, V1S, V2S, V3S, V4S value is 0, VR and VT value is 0 and stores；
B, the value of V1S and V3S is compared, if V1S value is more than 0, V3S value equal to 0, then takes V1S value for the VR of this sub-sampling
Value, takes V2S value for the VT value of this sub-sampling；If V1S value is equal to 0, V3S value is more than 0, then take V3S value for the VR value of this sub-sampling,
Take V4S value for the VT value of this sub-sampling；If V1S value is more than 0, V3S value more than 0, then the little value of magnitude of voltage in V1S and V3S is taken to be
The VR value of this sub-sampling, the value taking magnitude of voltage in V2S and V4S big is the VT value of this sub-sampling；VR and VT value is stored；
（8）Judge whether the timing period T2 counting timer arrives, if timing period T2 does not arrive, enter step（5）If, meter
When period T2 arrive, enter step（9）；
（9）Effective skin resistive voltage value of the multiple non-zeros in timing period T2 memory storage is averaged, obtains one averagely
Skin resistive voltage value simultaneously stores, and effective skin temperature voltage value of the multiple non-zeros in timing period T2 memory storage is averaged,
Obtain an average skin temperature degree magnitude of voltage and store；
（10）Judge whether the average skin resistive voltage value number of storage or average skin temperature degree magnitude of voltage number reach n, if
Not up to n, then the clearing of statistics timer, enters step（1）If reaching n, enter step (11)；
（11）Before judgement, whether the average skin resistive voltage value of n or front n average skin temperature degree magnitude of voltage the feelings being continuously reduced
Condition, if occurring, enters step（12）；If not occurring, statistics timer resets, and enters step（1）；
（12）Send alarm signal, monitor the transient voltage value of S1 and S3 simultaneously；If any one magnitude of voltage becomes in S1 and S3
Change, from changing to less than Vs or when changing to more than Vs less than Vs more than Vs, report to the police and terminate, statistics timer resets, and enters
Enter step（1）.
6. alarming method for fatigue drive according to claim 5 it is characterised in that described collection left hand skin resistance signal and
The method of right hand skin resistance signal is：Using constant-current source respectively to the left skin resistance collection being arranged on steering wheel left hand holding position
Module and the right skin resistance acquisition module two ends being arranged on right hand holding position carry out being energized to gathering；
Described collection left hand skin temperature signal and the method for right hand skin temperature signal are：Using constant-current source respectively to being arranged on direction
Face left handle the left skin temperature acquisition module holding on position and be arranged on the right hand hold position on right skin temperature acquisition module two ends enter
Row energising is gathering.
7. alarming method for fatigue drive according to claim 6 is it is characterised in that described believe for gathering left hand skin resistance
Number and the output current of constant-current source of right hand skin resistance signal be sized to according to the magnitude of voltage situation of S1 and S3 that monitors
Adjustment.
8. alarming method for fatigue drive according to claim 5 is it is characterised in that described step（12）Type of alarm
For：
（1）Slight warning；
（2）After slightly being reported to the police, the voltage value changes of monitoring S1 and S3, in stipulated time section, if the magnitude of voltage of S1 and S3
Stablize interval less than Vs or stable more than Vs interval, carry out moderate warning；
（3）After carrying out moderate warning, the voltage value changes of monitoring S1 and S3, in stipulated time section, if the magnitude of voltage of S1 and S3
Stablize interval less than Vs or stable more than Vs interval, enter line height and report to the police.
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| CN112124322A (en) * | 2020-09-27 | 2020-12-25 | 广州小鹏自动驾驶科技有限公司 | System and method for reminding driver of driving without hands |
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