A kind of body gesture regulating system and method based on air springTechnical field
The present invention relates to field of automobile safety more particularly to a kind of body gesture regulating systems and side based on air springMethod.
Background technique
Because its unique advantage is more and more widely used on vehicle, performance depends primarily on air suspensionSuspension parameter, and the rigidity of the passive air suspension of tradition in design once selected just can not change.It some more runs encounteringWhen the road surface winnowed with a dustpan, the natural frequency of vibration of the air spring of air suspension can be very high, cannot play damping effect well, influence passengerRiding comfort and driver driving impression.In order to improve the comfort of passenger's seating, can increase air bag in air spring hasVolume is imitated, after the effective volume of air bag increases, the vibration amplitude of vehicle will reduce under identical road conditions.
Currently, existing air spring is issued by controller by automatically controlled automatic adjustment vehicle body in the marketElectric signal control, and there is certain limitation to control control valve by the electric signal that controller issues, such as in mountain area rowWhen sailing, bend is more, and Ackermann steer angle has biggish inclination, in order to guarantee traffic safety, needs to close control valve in advance, butDue to the sending of controller electric signal do not have it is in-advance, may turning when just can issue control electromagnetism valve breakdown signal,It is unfavorable when this is to driving.Furthermore since the behavior that controller issues signal does not have subjectivity, can not intelligently relax in drivingIt is selected between adaptive and anti-rolling capability.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of based on sky for defect involved in background techniqueThe body gesture regulating system and method for gas spring.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of body gesture regulating system based on air spring includes vehicle sensors module, pre-processing module, master control moldingBlock, adjustment module, voice cue module and emergency manual button；
The vehicle sensors module includes four height sensors and acceleration transducer；
Four height sensors are installed on the vehicle frame at four wheels, for detecting vehicle frame at four wheels and groundThe distance between face, and pass it to the pre-processing module；
The acceleration transducer is arranged on the suspension of vehicle, for acquiring vehicle body acceleration, and pass it to it is described beforeProcessing module；
The adjustment module includes four air springs and auxiliary chamber；Four air springs are separately positioned on the four of automobileAt a suspension, it is respectively used to the posture of four suspensions of adjustment；
The air spring includes air bag, baroceptor, exhaust motor-driven valve and air inlet motor-driven valve；The air bag is equipped with air inletHole and gas vent, wherein the gas vent is connected by pipeline and the external world, and air inlet is connected by pipeline and auxiliary chamberIt is logical；The baroceptor is arranged in air bag, for incuding the air pressure in air bag and passing it to the pre-processing module；The exhaust motor-driven valve is separately positioned in gas vent and the extraneous pipeline being connected, for making air bag towards the external world when openingIt deflates, so that air spring elasticity becomes smaller, improves ride comfort；The air inlet motor-driven valve be separately positioned on air inlet andIn the pipeline that auxiliary chamber is connected, for inflating auxiliary chamber to air bag, so that air spring bullet when openingProperty becomes larger, and enhances the anti-roll capability of vehicle body；
The pre-processing module be used for distance of the vehicle frame received at four wheels between ground, vehicle body acceleration,After air pressure in four air-spring bellows carries out analog and digital signal conversion, filtering, rejecting abnormalities data, it is transferred to described totalControl module；
The speech prompting system is used to issue early warning to driver；
The driver's cabin of vehicle is arranged in the emergency manual button, for inputting urgent switching command to the total control module；
The total control module respectively with the pre-processing module, emergency manual button, four air springs exhaust motor-driven valve,The air inlet motor-driven valve of four air springs, voice cue module are electrically connected, for according to pre-processing module, emergency manual buttonThe data of transmitting control air inlet motor-driven valve, the voice prompting mould of the exhaust motor-driven valve of four air springs, four air springsBlock work.
The invention also discloses a kind of control methods for being somebody's turn to do the body gesture regulating system based on air spring, comprising followingStep:
Step 1), four height sensors, acceleration transducer, four air springs baroceptor obtain vehicle respectivelyAir pressure of the frame in distance, vehicle body acceleration A and four air-spring bellows at four wheels between ground, and by itsPass to the pre-processing module；
Step 2, pre-processing module are used to accelerate distance of the vehicle frame received at four wheels between ground, vehicle bodyAfter spending A, the air pressure progress analog and digital signal conversion in four air-spring bellows, filtering, rejecting abnormalities data, it is transferred to instituteState total control module；
Step 3), total control module calculate the difference L1 of vehicle frame distance between ground at left side rear wheel, right side rear wheel, calculateThe difference L2 of vehicle frame distance between ground at left side front-wheel, right side front wheel；
Step 4), total control module acquire the absolute value L of L1 and L2 average value；
Step 5), total control module compare A and preset acceleration rate threshold B, and L and preset stationary value M are compared, and judgesWhether emergency manual button is pressed；
Step 5.1), if A is less than or equal to, B, L are less than or equal to M and emergency manual button is not pressed, and vehicle body is steady at this time, nothingRollover risk, total control module compare the air pressure in four air-spring bellows with preset first air pressure threshold value respectivelyCompared with for each air spring:
Step 5.1.1), if the air pressure in air spring is less than preset first air pressure threshold value, control the exhaust of air springMotor-driven valve is closed, the air inlet motor-driven valve of air spring is opened, and is inflated to the air bag in air spring, until in air springAir pressure be equal to preset first air pressure threshold value；
Step 5.1.2), if the air pressure in air spring is greater than preset first air pressure threshold value, control the exhaust of air springMotor-driven valve is opened, the air inlet motor-driven valve of air spring is closed, and is deflated to the air bag in air spring, until in air springAir pressure be equal to preset first air pressure threshold value；
Step 5.2), if A is greater than, B, L are less than or equal to M and emergency manual button is not pressed, and vehicle body jolts at this time, no rolloverAir pressure in four air-spring bellows is compared with preset second air pressure threshold value by risk, total control module respectively, institutePreset second air pressure threshold value is stated less than preset first air pressure threshold value, for each air spring:
Step 5.2.1), if the air pressure in air spring is less than preset second air pressure threshold value, control the exhaust of air springMotor-driven valve is closed, the air inlet motor-driven valve of air spring is opened, and is inflated to the air bag in air spring, until in air springAir pressure be equal to preset second air pressure threshold value；
Step 5.2.2), if the air pressure in air spring is greater than preset second air pressure threshold value, control the exhaust of air springMotor-driven valve is opened, the air inlet motor-driven valve of air spring is closed, and is deflated to the air bag in air spring, until in air springAir pressure be equal to preset second air pressure threshold value；
Step 5.3) has rollover risk, total control module is led if L is greater than M or emergency manual button is pressed at this timeDynamic control:
Step 5.3.1), total control module controls voice cue module and issues early warning to driver；
Step 5.3.2), the mesh of four air-spring bellows is calculated according to distance of the vehicle frame at four wheels between groundStandard gas pressure, and exhaust motor-driven valve and air inlet motor-driven valve by controlling each air spring, so that four air-spring bellowsAir pressure is and its target air pressure is equal.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
1. the present invention is equipped with emergency manual button on the basis of motor-operated control valve, convenient for driver in advance according to road conditions subjectivityManipulation emergency manual button to vehicle suspension carry out active control, improve airsuspension system to the adaptation energy of different road conditionsPower ensure that the safety of driving.
2. the present invention adjusts body gesture by air spring, the air bag in air spring is connected with auxiliary chamber, can be straightThe softness and rigidity of adjustment air spring, and the softness of four air springs of degree adjust automatically that jolt according to vehicle body are connect, is madeIt must travel more comfortable.
Detailed description of the invention
Fig. 1 is the body gesture regulating system structural schematic diagram of the invention based on air spring；
Fig. 2 is the flow diagram of the body gesture regulating system control method of the invention based on air spring.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing:
The present invention can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.On the contrary, providingThese embodiments are thoroughly and complete to make the disclosure, and will give full expression to the scope of the present invention to those skilled in the art.In the accompanying drawings, for the sake of clarity it is exaggerated component.
As shown in Figure 1, the invention discloses a kind of body gesture regulating system based on air spring, includes vehicle sensoryDevice module, pre-processing module, total control module, adjustment module, voice cue module and emergency manual button；
The vehicle sensors module includes four height sensors and acceleration transducer；
Four height sensors are installed on the vehicle frame at four wheels, for detecting vehicle frame at four wheels and groundThe distance between face, and pass it to the pre-processing module；
The acceleration transducer is arranged on the suspension of vehicle, for acquiring vehicle body acceleration, and pass it to it is described beforeProcessing module；
The adjustment module includes four air springs and auxiliary chamber；Four air springs are separately positioned on the four of automobileAt a suspension, it is respectively used to the posture of four suspensions of adjustment；
The air spring includes air bag, baroceptor, exhaust motor-driven valve and air inlet motor-driven valve；The air bag is equipped with air inletHole and gas vent, wherein the gas vent is connected by pipeline and the external world, and air inlet is connected by pipeline and auxiliary chamberIt is logical；The baroceptor is arranged in air bag, for incuding the air pressure in air bag and passing it to the pre-processing module；The exhaust motor-driven valve is separately positioned in gas vent and the extraneous pipeline being connected, for making air bag towards the external world when openingIt deflates, so that air spring elasticity becomes smaller, improves ride comfort；The air inlet motor-driven valve be separately positioned on air inlet andIn the pipeline that auxiliary chamber is connected, for inflating auxiliary chamber to air bag, so that air spring bullet when openingProperty becomes larger, and enhances the anti-roll capability of vehicle body；
The pre-processing module be used for distance of the vehicle frame received at four wheels between ground, vehicle body acceleration,After air pressure in four air-spring bellows carries out analog and digital signal conversion, filtering, rejecting abnormalities data, it is transferred to described totalControl module；
The speech prompting system is used to issue early warning to driver；
The driver's cabin of vehicle is arranged in the emergency manual button, for inputting urgent switching command to the total control module；
The total control module respectively with the pre-processing module, emergency manual button, four air springs exhaust motor-driven valve,The air inlet motor-driven valve of four air springs, voice cue module are electrically connected, for according to pre-processing module, emergency manual buttonThe data of transmitting control air inlet motor-driven valve, the voice prompting mould of the exhaust motor-driven valve of four air springs, four air springsBlock work.
As shown in Fig. 2, the invention also discloses a kind of controlling parties for being somebody's turn to do the body gesture regulating system based on air springMethod comprising the steps of:
Step 1), four height sensors, acceleration transducer, four air springs baroceptor obtain vehicle respectivelyAir pressure of the frame in distance, vehicle body acceleration A and four air-spring bellows at four wheels between ground, and by itsPass to the pre-processing module；
Step 2, pre-processing module are used to accelerate distance of the vehicle frame received at four wheels between ground, vehicle bodyAfter spending A, the air pressure progress analog and digital signal conversion in four air-spring bellows, filtering, rejecting abnormalities data, it is transferred to instituteState total control module；
Step 3), total control module calculate the difference L1 of vehicle frame distance between ground at left side rear wheel, right side rear wheel, calculateThe difference L2 of vehicle frame distance between ground at left side front-wheel, right side front wheel；
Step 4), total control module acquire the absolute value L of L1 and L2 average value；
Step 5), total control module compare A and preset acceleration rate threshold B, and L and preset stationary value M are compared, and judgesWhether emergency manual button is pressed；
Step 5.1), if A is less than or equal to, B, L are less than or equal to M and emergency manual button is not pressed, and vehicle body is steady at this time, nothingRollover risk, total control module compare the air pressure in four air-spring bellows with preset first air pressure threshold value respectivelyCompared with for each air spring:
Step 5.1.1), if the air pressure in air spring is less than preset first air pressure threshold value, control the exhaust of air springMotor-driven valve is closed, the air inlet motor-driven valve of air spring is opened, and is inflated to the air bag in air spring, until in air springAir pressure be equal to preset first air pressure threshold value；
Step 5.1.2), if the air pressure in air spring is greater than preset first air pressure threshold value, control the exhaust of air springMotor-driven valve is opened, the air inlet motor-driven valve of air spring is closed, and is deflated to the air bag in air spring, until in air springAir pressure be equal to preset first air pressure threshold value；
Step 5.2), if A is greater than, B, L are less than or equal to M and emergency manual button is not pressed, and vehicle body jolts at this time, no rolloverAir pressure in four air-spring bellows is compared with preset second air pressure threshold value by risk, total control module respectively, institutePreset second air pressure threshold value is stated less than preset first air pressure threshold value, for each air spring:
Step 5.2.1), if the air pressure in air spring is less than preset second air pressure threshold value, control the exhaust of air springMotor-driven valve is closed, the air inlet motor-driven valve of air spring is opened, and is inflated to the air bag in air spring, until in air springAir pressure be equal to preset second air pressure threshold value；
Step 5.2.2), if the air pressure in air spring is greater than preset second air pressure threshold value, control the exhaust of air springMotor-driven valve is opened, the air inlet motor-driven valve of air spring is closed, and is deflated to the air bag in air spring, until in air springAir pressure be equal to preset second air pressure threshold value；
Step 5.3) has rollover risk, total control module is led if L is greater than M or emergency manual button is pressed at this timeDynamic control:
Step 5.3.1), total control module controls voice cue module and issues early warning to driver；
Step 5.3.2), the mesh of four air-spring bellows is calculated according to distance of the vehicle frame at four wheels between groundStandard gas pressure, and exhaust motor-driven valve and air inlet motor-driven valve by controlling each air spring, so that four air-spring bellowsAir pressure is and its target air pressure is equal.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skillArt term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.AlsoIt should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior artThe consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effectsIt is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the inventionBright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present inventionProtection scope within.