CN102848999B - Intelligent monitoring and controlling method and device for oxygen content in car - Google Patents
Intelligent monitoring and controlling method and device for oxygen content in car Download PDFInfo
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- CN102848999B CN102848999B CN201210347075.8A CN201210347075A CN102848999B CN 102848999 B CN102848999 B CN 102848999B CN 201210347075 A CN201210347075 A CN 201210347075A CN 102848999 B CN102848999 B CN 102848999B
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Abstract
An intelligent monitoring and controlling method for oxygen content in a car uses cycle wakeup for operation. The method includes when operation is started, monitoring whether there are passengers in the car or not, and starting to monitor oxygen content in the car if the passengers are detected to be in the car under wakeup condition; alarming by a system to remind the passengers in the car of paying attention to space ventilation in the car when oxygen content in the car is lower than a first alarm threshold value and anoxic risk is possibly caused, and turning on an air conditioner for ventilation simultaneously to improve air condition in the car; and activating an alarm when oxygen content in the car is detected to be further reduced and is close to a second alarm threshold value and the passengers in the car are in danger of life, and unlocking locks of four doors so that people outside can come in to rescue. After operation is finished, the system enters a sleep state to save energy. The invention further discloses a device implementing the method. By the use of the intelligent monitoring and controlling method and device, lives and health of the passengers in the car can be prevented from threatening of insufficient oxygen content.
Description
Technical field
The invention belongs to vehicle electric field, relate in particular to the field that utilizes sensor technology and electron controls technology to carry out vehicle environmental monitoring.
Background technology
Along with growth in the living standard, automobile has become a kind of general tool of riding instead of walk in people's daily life gradually, and the variety of problems relevant to vehicle also causes people's concern gradually.Conventionally, in order to improve refrigeration (heat) efficiency of vehicle, the door and window of automobile is all in closed condition, makes the car inner air and outer air cannot normal convection.Long-time vehicle window door is closed, although can improve refrigeration (heat) efficiency of vehicle, makes occupant more comfortable, also can cause the serious phenomenon of in-vehicle air pollution simultaneously.When situation is serious, even can cause the interior too low passenger of causing of oxygen content of car due to the accident for hypoxgia death.In recent years, appearance a lot of due to heat in summer, personnel turn on the aircondition sleep and cause the tragedy of hypoxia death in automobile, have waken especially the concern of people to in-car air quality problem up.For avoiding this type of unfortunate generation; except strengthening sense of self-protection; avoid resting on for a long time inside and outside the car of sealing; more effective failure-free mode is to provide oxygen content intelligent control method in a kind of car; the oxygen content of interior space is carried out to intelligent monitoring; remind passenger to notice that interior space ventilates, prevent the generation of the not enough situation of oxygen in car.
Summary of the invention
The present invention is by oxygen content in car is carried out to intelligent monitoring, reports to the police, and initiatively improve ventilation condition in car when life and health that the content of oxygen in air of interior space may threaten passenger.
The present invention realizes by following scheme:
An oxygen content intellectual monitoring control method in car, comprises the following steps:
(1) in periodic monitoring vehicle, whether there is occupant: Ruo Chenei does not have occupant, stop this detection; If detect in car and have occupant, according to the numerical value of oxygen content the first alarm threshold values and the second alarm threshold values in number of occupants restriction car, and proceed to step (2), wherein, described the first alarm threshold values is greater than described the second alarm threshold values;
(2) oxygen content in periodic monitoring car: if oxygen content is higher than described the first alarm threshold values in judgement car, stops this oxygen content and detect; If oxygen content, lower than described the first alert threshold, is carried out immediately alarm, and shortened oxygen content monitoring periods in judgement car, proceed to step (3);
(3) read car status information, adjust Air conditioner air exchange state, improve oxygen content in car: if through adjusting, in car, oxygen content returns on described the first alarm threshold values, continue step (2) monitoring; If oxygen content continues to reduce in judgement car, proceed to step (4);
(4) Ruo Chenei oxygen content continues to reduce, and approaches described the second alarm threshold values: untie door lock for vehicle, and report to the police.
Described step (3) comprises, reads air-conditioning state information in car:
(a) if air-conditioning is opened and in ventilation state, strengthen Air conditioner air exchange power;
(b) if air-conditioning in halted state, is opened air-conditioning, and according to engine condition, carry out the control of Air conditioner air exchange.
Described step (b) also comprises, reads engine condition information: if driving engine in running state, is opened middle-grade Air conditioner air exchange function; If driving engine in halted state, is opened low-grade Air conditioner air exchange function.
Described step (4) also comprises, monitoring car door lock state: if car door, in blocking, is untied door lock, and report to the police; If car door is opened, directly carry out alarm.
Preferably, within every 4 to 5 minutes, carry out oxygen content monitoring in passenger's monitoring or car.
Preferably, according to number of occupants actual in car, maintain the oxygen content of surviving for 7 minutes and determine described the second alert threshold.
A kind of interior oxygen content intelligent monitoring control setup of car of realizing said method, comprise MCU microcontroller, the exhaust gas oxygensensor being connected with described MCU microcontroller respectively, seat bearing sensor, air-conditioner controller, four door controllers and alarm controller, whether described seat bearing sensor judges on seat has passenger to exist, oxygen content in described exhaust gas oxygensensor Real-Time Monitoring car, described MCU microcontroller gathers the information of described exhaust gas oxygensensor and the transmission of described seat bearing sensor, judge in car, whether oxygen content exceeds standard, completing Air conditioner air exchange controls, car alarming is controlled and car door opening is controlled.
Oxygen content intelligent monitoring and controlling device in described car, also comprises engine management system, and described engine management system is connected with described MCU microcontroller, and MCU microcontroller reads engine management system state, carries out Air conditioner air exchange control.
Oxygen content intelligent monitoring and controlling device in described car, also comprises four door sensors, and described four door sensors are connected with described MCU microcontroller, door closing status information is sent to described MCU microcontroller and processes.
The present invention adopts periodic awakening to carry out work, while starting working, whether has occupant in monitoring car, if detect in car and have people under waking situation up, starts to carry out oxygen content monitoring in car.Oxygen content in monitoring car is lower than the first alarm threshold values, and in the time of may having hypoxic hazard, system is carried out alarm, reminds occupant to notice that interior space ventilates, and opens Air conditioner air exchange simultaneously, improves air condition in car; In car being detected, oxygen content further reduces and approaches the second alarm threshold values, when passenger exists life danger, and starts warning, four door locks is opened, so that the people of outside sues and labours.After end-of-job.System enters sleep state, to save the energy.Amount of oxygen in this system intelligence monitoring car, is judged whether to start warning, opening car door and is opened Air conditioner air exchange switch in car by related algorithm by gathering in the running state of oxygen content, engine starting state, air-conditioning in car and car the state of bearing sensor on each seat.Oxygen content in this system intelligence monitor vehicle, can avoid passenger's life and health to be subject to the threat of oxygen content deficiency by actv..
Accompanying drawing explanation
Fig. 1 is workflow diagram of the present invention;
Fig. 2 is construction module figure of the present invention.
The specific embodiment
As shown in Figure 1, oxygen content intellectual monitoring control method in a kind of car, comprises following algorithm:
(1) in inspection vehicle, whether there is occupant: if there is no occupant in judgement vehicle, stop this detection; If detect in car and have occupant, according to passenger's quantity, limit after the numerical value of the first alarm threshold values and the second alarm threshold values, proceed to step (2); The first alarm threshold values is greater than the second alarm threshold values.
The first alarm threshold values and the second alarm threshold values are for limiting the warning value of oxygen content in car.When amount of oxygen is lower than the numerical value of the first alarm threshold value setting in car, illustrate that the quality of oxygen content in car is not in preferred range; When oxygen content is lower than the second alarm threshold values in car, value at stake of oxygen content numerical value is described in car.
In the present embodiment, the oxygen content that maintains existence in 7 minutes according to passengers quantity actual in car is determined the second alarm threshold values.General, adult's anoxic time, while arriving 5 minutes, likely causes death, therefore, select adult to maintain the oxygen consumption of existence in 7 minutes as the warning value of amount of oxygen deficiency in car, can provide time enough to allow passenger realize and save oneself or succour processing for the outer personnel of car; Choosing of the numerical value of the first alarm threshold values only need be greater than the second alarm threshold values numerical value, and in the present embodiment, the oxygen content that maintains existence in 14 minutes according to passengers quantity actual in car is determined the first alert threshold.
(2) oxygen content in periodic monitoring car: if oxygen content is higher than the first alarm threshold values in judgement car, stops this oxygen content and detect; If oxygen content, lower than the first alert threshold, is carried out alarm to occupant immediately, and shortened oxygen content sense cycle in judgement car, proceed to step (3); In the present embodiment, by buzzer phone, carry out alarm.
While there is occupant in monitoring car, start regularly oxygen content in car to be monitored, prevent occupant's anaerobic condition.In the present embodiment, every 4 to 5 minutes, carry out passenger and oxygen content monitoring.Consider energy-conservation, this system is taked the periodically design of image data, because common people under anaerobic conditions can not be over 5 minutes, in the present embodiment, this system adopts the cycle of every 4 to 5 minutes to detect, and at other times, anoxic warning is in dormant state, can monitor in time oxygen content situation in car, not carry out unnecessary power consumption simultaneously.
System compares the first alarm threshold values of real-time oxygen content and restriction in the car recording, if oxygen content numerical value is higher than the first alarm threshold values in real time, illustrates that in car, ventilation condition is more satisfactory, only needs continuation periodic monitor; In car oxygen content lower than limit the first alarm threshold values time, illustrate that occupant's existence has existed certain danger, need to remind in time, improve the interior oxygen content situation of car.Meanwhile, shorten the monitoring periods of oxygen content in car, prevent in system hibernates overlong time, the situation that in car, oxygen content situation worsens occurs.If desired, in judgement car, oxygen content, lower than the first alarm threshold values limiting, can be monitored constantly to oxygen content in car, prevents unexpected generation.
(3) read car status information, adjust Air conditioner air exchange state, to improve oxygen content in car: Ruo Chenei oxygen content returns on the first alarm threshold values, continue step (2); Ruo Chenei oxygen content continues to reduce, and proceeds to step (4);
In step (2), monitored the interior oxygen content of car lower than the first alarm threshold values, need to improve ventilation condition in car, if point out through system alarm, passenger is by opening the modes such as car door or vehicle window, or system is carried out on-board air conditioner ventilation according to car intrinsic motivation state, running state of air conditioner voluntarily and is adjusted, oxygen content in car is returned on the first alarm threshold values, dangerous releasing, system continues the monitoring of step (2).
It is as follows that system is adjusted the interior oxygen content step of car automatically:
Read air-conditioning state information in car:
(a) if air-conditioning is opened and in ventilation state, strengthen Air conditioner air exchange power;
(b) if air-conditioning in halted state, is opened air-conditioning, and according to engine condition, carry out the control of air-conditioning.
In step (b), the control of carrying out air-conditioning according to engine condition specifically comprises the following steps: read car intrinsic motivation status information, if now driving engine is in running state, illustrate that vehicle is in running state, can not consider the Expenditure Levels of electric weight, keep for a long time Air conditioner air exchange function to open middle-grade Air conditioner air exchange function; If driving engine, in halted state, because air-conditioning consumption is larger, adopts and temporarily opens Air conditioner air exchange function, open low-grade Air conditioner air exchange function and report to the police.
If after adjusting, in car, oxygen content state there is no improvement, continues on the contrary to reduce, and proceeds to step (4) and processes.
(4) if the interior oxygen content of car at that time being detected continues to reduce, and approach the second alarm threshold values, untie door lock, with the personnel outside convinent car, succour, and carry out alarm, to wake passenger up, or attract the outer personnel's attention of car, succour in time.
Concrete steps are as follows, read automobile door lock status information: if car door, in blocking, is untied door lock, and reported to the police; If car door is opened, directly carry out alarm.
When through Air conditioner air exchange adjustment in car, when oxygen content continues to be down to the second alarm threshold values in car, illustrate that occupant may be in automatism, need outside aid, now, system reads automobile door lock status information, if door lock locking, system sends instruction to four door controller, opens lock, simultaneously, carry out alarm, attract external staff to note, check situation in car, succour; If the release of car door door lock, the emergency of directly reporting to the police.
The power supply of this system is provided by vehicle power, considers energy-conservationly, and system adopts internal timing to wake up, and in the present embodiment, wake-up period is 4min.When system is started working, in monitoring car, whether there is occupant, if detected in car, have people under waking situation up, carry out oxygen content monitoring in car.Oxygen content in monitoring car is lower than the first alarm threshold values, and in the time of can not meeting occupant's needs, system is carried out alarm, reminds occupant to notice that interior space ventilates, and opens Air conditioner air exchange simultaneously; When oxygen content further reduces and approaches the second alarm threshold values in car being detected, four door locks are opened, so that the people of outside sues and labours, and started warning.As long as occupant does not remove this function, system will be always in alarm condition.
As shown in Figure 2, a kind of for realizing oxygen content intelligent monitoring and controlling device in car, comprise MCU microcontroller, the exhaust gas oxygensensor being connected with MCU microcontroller respectively, seat bearing sensor, air-conditioner controller, four door controllers and alarm controller, whether seat bearing sensor judges on seat has passenger to exist, oxygen content in exhaust gas oxygensensor Real-Time Monitoring car, MCU microcontroller gathers the data of exhaust gas oxygensensor and the transmission of seat bearing sensor, judge in car, whether oxygen content exceeds standard, complete Air conditioner air exchange control, car alarming control and car door opening and control.
MCU microcontroller regularly reads the information that seat bearing sensor transmits, judge and in car, whether have occupant, Ruo Chenei has occupant, and MCU microcontroller continues regularly to read exhaust gas oxygensensor, oxygen content state in Real-Time Monitoring car, if oxygen content is not enough in discovery car, easily cause danger, instruction occurs to alarm controller, carry out alarm, and according to oxygen content state in car, further control air-conditioner controller and take a breath, improve air regime in car; When oxygen content situation continued worsens in monitoring car, send instruction to four door controller, open car door, and indication warning controller reports to the police, carry out external help request.
Oxygen content intelligent monitoring and controlling device in car, also comprises engine management system, and engine management system is connected with MCU microcontroller, and MCU microcontroller reads engine management system status signal, carries out Air conditioner air exchange control.The status signal of driving engine is used for judging that whether car is in running state, if running state, can not consider the Expenditure Levels of electric weight, can keep for a long time Air conditioner air exchange function; If driving engine, not in running state, because air-conditioning consumption is larger, adopts the situation of temporarily opening Air conditioner air exchange function and reporting to the police.
Oxygen content intelligent monitoring and controlling device in car, also comprises four door sensors, and four door sensors are connected with MCU microcontroller, door closing status information is sent to MCU microcontroller and processes.In car, oxygen content is lower than the second alarm threshold values, and while needing external rescue, MCU microcontroller is processed by reading four door sensor signal judgement door closing states, and then controls four door controllers and open car door, facilitates outside aid.
Amount of oxygen in this device intellectual monitoring car, is judged whether to start warning, opening car door and is opened Air conditioner air exchange switch in car by related algorithm by gathering in the running state of oxygen content, engine starting state, air-conditioning in car and car the state of bearing sensor on each seat.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.Person skilled in the art obviously can easily make various modifications to above-described embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and the improvement of making for the present invention and modification all should be within protection scope of the present invention.
Claims (3)
1. an oxygen content intellectual monitoring control method in car, is characterized in that: comprise the following steps:
(1) within every 4 to 5 minutes, in periodic monitoring vehicle, whether there is occupant: Ruo Chenei does not have occupant, stops this detection; If detect, in car, there is occupant, according to the numerical value of oxygen content the first alert threshold and the second alert threshold in number of occupants restriction car, and proceed to step (2), wherein, described the first alert threshold is greater than described the second alert threshold, and the oxygen content that maintains existence in 7 minutes according to number of occupants actual in car is determined described the second alert threshold;
(2) oxygen content in every 4 to 5 minutes periodic monitoring cars: if oxygen content is higher than described the first alert threshold in judgement car, stops this oxygen content and detect; If oxygen content, lower than described the first alert threshold, is carried out immediately alarm, and shortened oxygen content monitoring periods in judgement car, proceed to step (3);
(3) read car status information, adjust Air conditioner air exchange state, improve oxygen content in car:
(a) if air-conditioning is opened and in ventilation state, strengthen Air conditioner air exchange power;
(b) if air-conditioning, in halted state, is opened air-conditioning, and carried out the control of Air conditioner air exchange according to engine condition, read engine condition information: if driving engine in running state, is opened middle-grade Air conditioner air exchange function; If driving engine in halted state, is opened low-grade Air conditioner air exchange function;
If through adjusting, oxygen content returns on described the first alert threshold in car, continue step (2) monitoring; If oxygen content continues to reduce in judgement car, proceed to step (4);
(4) Ruo Chenei oxygen content continues to reduce, and approaches described the second alert threshold: untie door lock for vehicle, and report to the police.
2. oxygen content intellectual monitoring control method in car according to claim 1, is characterized in that: described step (4) also comprises, monitoring car door lock state: if car door, in blocking, is untied door lock, and report to the police; If car door is opened, directly carry out alarm.
3. a device of realizing method described in claim 1, comprise MCU microcontroller, it is characterized in that: also comprise the exhaust gas oxygensensor, seat bearing sensor, air-conditioner controller, four door controllers, alarm controller, engine management system and four door sensors that are connected with described MCU microcontroller respectively;
Whether described seat bearing sensor judges on seat has passenger to exist;
Oxygen content in described exhaust gas oxygensensor Real-Time Monitoring car;
Described engine management system is connected with described MCU microcontroller, and MCU microcontroller reads engine management system state, carries out Air conditioner air exchange control;
Described four door sensors are connected with described MCU microcontroller, door closing status information is sent to described MCU microcontroller and processes;
Described MCU microcontroller gathers the information of described exhaust gas oxygensensor and the transmission of described seat bearing sensor, judges in car, whether oxygen content exceeds standard, and completes Air conditioner air exchange control, car alarming control and car door opening and controls.
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