CN102180139A - Proximity trigger safety air bag and safety control method thereof - Google Patents
Proximity trigger safety air bag and safety control method thereof Download PDFInfo
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- CN102180139A CN102180139A CN 201110102184 CN201110102184A CN102180139A CN 102180139 A CN102180139 A CN 102180139A CN 201110102184 CN201110102184 CN 201110102184 CN 201110102184 A CN201110102184 A CN 201110102184A CN 102180139 A CN102180139 A CN 102180139A
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Abstract
The invention discloses a proximity trigger safety air bag comprising a speed and distance detecting module, an acceleration transducer, a control module and an air bag module, wherein the speed and distance detecting module is used for detecting whether the speed of an objective obstacle reaches a preset speed danger value or not and whether the distance of the objective obstacle reaches a preset distance danger value or not; the control module is connected with the speed and distance detecting module and the acceleration transducer and is used for receiving signals sent by the speed and distance detecting module and the acceleration transducer; and the control module is also connected with the air bag module and used for controlling the air bag module. The invention also discloses a method of carrying out safety control by utilizing the proximity trigger safety air bag. By means of the proximity trigger safety air bag provided by the invention, the ignition time of the air bag can be advanced and a safety belt can be tensioned before collision in the mean time, therefore, the passenger safety can be effectively protected.
Description
Technical field
The present invention relates to a kind of nearly thoughts and feelings and send out safety air bag and method of controlling security thereof.
Background technology
Safe automobile air bag in the market triggers initiation system and adopts crash sensor mostly, acceleration magnitude during according to auto against, after perception and the target collision to a certain degree,, acceleration information just provides time break startup gas generator, deployment balloon through being handled.Ideally touch and judge through computer for analysis and to provide ignition signal from collision, generally will be through nearly 10ms to tens ms times, actual acceleration/accel when opening air bag has generally reached 7-10g; Behind the given time of ignition, also to fill the time of rising air bag is opened fully through about 30ms air bag.As seen in the ideal case, touching air bag from collision fills fully to rise and needs 40-60ms approximately.About optimum igniting determining constantly, it is generally acknowledged at present: in the automobile collision procedure, the preceding 30ms when occupant's head moves forward about 13cm is the optimum igniting moment.For bondsman's head can correctly move forward about 13cm, present many high-end vehicles do not stint has increased various auxiliary detectors, as detect the driver, occupant's height, body weight, position, sitting posture and from distance of direction card or the like, offer the computer for analysis judgment processing, this has increased the complexity and the cost of device greatly.As seen, existing oldfashioned sparking mode just can draw whether collide and provide at last ignition signal after need judging through complicated calculating identification the collision acceleration information in collision process.In fact, want to calculate maximum swelling that air bag just in time begins to contact with the head part constantly, this can accomplish in theory, is difficult in the practice, is not that contact early is exactly to contact evening, will cause more major injury to human body and contact air bag too early.Because the time that can provide discriminating during collision, very finite sum was very brief, how effectively to race against time to seem particularly important.
Summary of the invention
In order to solve existing technical matters, the invention provides a kind of nearly thoughts and feelings and send out safety air bag, old-fashioned relatively sparking mode makes point of ignition in advance; striven for the time; after air bag can fully be launched, just wait people's head and chest bump and come, can protect passengers inside the car's safety better.
The present invention has specifically adopted following technical scheme:
A kind of nearly thoughts and feelings is sent out safety air bag, comprises speed and range sensing module, acceleration pick-up, control module and air bag module; Whether the distance whether speed that described speed and range sensing module are used for detection of a target obstacle reaches pre-set velocity dangerous values and target obstacle reaches the predeterminable range dangerous values, described control module links to each other with range sensing module and described acceleration pick-up with described speed, be used to receive the signal that described speed and range sensing module and described acceleration pick-up are sent, described control module also links to each other with described air bag module, and described air bag module is controlled.Here, the speed of target obstacle and distance are represented relative velocity and the distance of target obstacle to vehicle respectively; Described air bag module comprises gas generator and air bag, and indication produces the igniting action to gas generator according to signal, lights solid fuel and produces gas to airbag aeration, and air bag is expanded rapidly.
Adopt technique scheme, before not colliding, the relative velocity that detects target obstacle when described speed and range sensing module surpasses pre-set velocity dangerous values (as 30km/h), and when the distance of target obstacle reaches predeterminable range dangerous values (as 5cm-30cm), promptly carry a danger signal to give control module; If (this time gap is roughly by pre-set velocity dangerous values and the decision of predeterminable range dangerous values in very short time gap, as working as the pre-set velocity dangerous values is 30km/h, and when the predeterminable range dangerous values is 30cm, need 36ms approximately with the speed of the 30km/h 30cm that passes by, this time gap is promptly got 36ms), described control module also receives the slight crash acceleration signal that acceleration pick-up transmits, as 2g-5g, then control module is controlled air bag module ignition and detonation and inflation immediately, thereby has realized shifting to an earlier date of point of ignition.If only before collision, detect speed and range information or only detect slight crash acceleration signal and just produce the igniting action, be easy to take place mis-ignition, and the light a fire generation of action of the present invention must detect speed, distance and acceleration/accel and all reaches corresponding dangerous values, thereby has avoided the generation of mis-ignition effectively.
As a further improvement on the present invention, described speed and range sensing module comprise: the microwave sounding unit is used to produce Doppler signal; Filter, the Doppler signal that is used to make relative velocity surpass the pre-set velocity dangerous values passes through and amplification; The signal amplitude discriminating unit is used for further detecting the Doppler signal amplitude, whether reaches the predeterminable range dangerous values with the distance of judging target obstacle.Speed described in this programme and range sensing module are based on that doppler principle on the physics makes.Utilize the microwave sounding unit to produce Doppler signal, the frequency size of Doppler signal and the Frequency and Amplitude relative velocity with target obstacle respectively are relevant with distance, can be used for short-range detecting, can measure the relative velocity and the approximate distance of target obstacle.Here, behind microwave sounding unit generation Doppler signal, by filter the Doppler signal that relative velocity surpasses the pre-set velocity dangerous values is passed through and amplification, the speed of judging target obstacle has indirectly reached the pre-set velocity dangerous values; Further detect the Doppler signal amplitude by the signal amplitude discriminating unit again, judge with further whether the distance of target obstacle reaches the predeterminable range dangerous values.
A kind of alternative as such scheme, described speed and range sensing module comprise: the microwave sounding unit that is used to produce Doppler signal, be used to judge whether the speed of target obstacle reaches the frequency detecting unit of pre-set velocity dangerous values, be used to detect the Doppler signal amplitude and whether reach the signal amplitude discriminating unit of predeterminable range dangerous values and control setup with the distance of judging target obstacle; The input end of described frequency detecting unit and described signal amplitude discriminating unit links to each other with described microwave sounding unit respectively, and mouth links to each other with described control setup respectively; Described control setup links to each other with described control module.In this programme, behind described microwave sounding unit generation Doppler signal, judge respectively by the two-way device whether the speed of target obstacle and distance reach corresponding dangerous values respectively again: the one tunnel is to be used to judge whether the speed of target obstacle reaches the frequency detecting unit of pre-set velocity dangerous values, and another road is to be used to detect whether the Doppler signal amplitude reaches the predeterminable range dangerous values with the distance of judging target obstacle signal amplitude discriminating unit.If described control setup receives the danger signal of described frequency detecting unit and the input of described signal amplitude discriminating unit simultaneously, danger signal of then described control setup output is given described control module.
As a further improvement on the present invention, described microwave sounding unit comprises projector, receptor, solid state microwave source, isolator and frequency mixer; Described projector links to each other with described solid state microwave source; The negative pole of described isolator links to each other with the solid state microwave source, and positive pole links to each other with the first input end of frequency mixer; Second input end of described frequency mixer links to each other with receptor, and the mouth of described frequency mixer is the mouth of described microwave sounding unit.The microwave signal of utilizing described solid state microwave source generation certain frequency is also by the outside beam transmission of described projector, and the echoed signal that target obstacle reflects is received by the receiver.Here oppositely be connected in isolator in the circuit, make very little a part of microwave signal reveal and arrive the first input end of frequency mixer by isolator, the echoed signal that the second input end receiving target obstacle of frequency mixer reflects, with these two signal mixing in frequency mixer, thereby obtain Doppler signal.
As the further improvement of such scheme, described microwave sounding unit also comprises the quantizer that links to each other with described solid state microwave source.Adopt quantizer to make solid state microwave source pulse launched microwave signal, produce the impulse singla of certain pulsewidth and repeated freqnency and outwards launch by projector.In the duration of pulse, the echoed signal that receptor can only receive in the certain distance is used to produce Doppler signal like this, thereby has got rid of the influence of other environment beyond the certain distance.
As a further improvement on the present invention, described signal amplitude discriminating unit comprises first detector and voltage comparator.After the first detector detection, compare the peak voltage of Doppler signal and the default threshold voltage size of voltage comparator by voltage comparator again, and the peak voltage size is represented the relative distance distance of target obstacle, the default threshold voltage of voltage comparator is made as the predeterminable range dangerous values corresponding voltage value of target obstacle, if peak voltage surpasses the default threshold voltage of voltage comparator, show that then the distance of target obstacle reaches the predeterminable range dangerous values.
As a further improvement on the present invention, described frequency detecting unit comprises filter and second detector.
As a further improvement on the present invention, described control module adopts AND circuit.
As a further improvement on the present invention, described nearly thoughts and feelings is sent out safety air bag and is also comprised the safety strap module that links to each other with range sensing module mouth with described speed, described safety strap module comprises safety strap control circuit, safety strap control motor and safety strap, described safety strap control circuit links to each other with described safety strap control motor, and described safety strap control motor is controlled the tension of safety strap and loosened.
As the further improvement of such scheme, described safety strap control circuit adopts can produce the positive negative pulse stuffing circuit that two-way is independently exported.Control safety strap control motor respectively by the two-way pulse output of positive negative pulse stuffing circuit and rotate and reverse, drive belt pull then respectively and loosen.
The present invention also comprises and a kind ofly utilizes above-mentioned nearly thoughts and feelings to send out the method that safety air bag carries out safety control, may further comprise the steps:
A. speed and range sensing: whether the distance whether speed of described speed and range sensing module detection of a target obstacle reaches pre-set velocity dangerous values and target obstacle reaches the predeterminable range dangerous values;
B. crash acceleration detects: detect the vehicle body crash acceleration by described acceleration pick-up and whether reach default dangerous values;
C. the distance that reaches pre-set velocity dangerous values and target obstacle when the speed of judging target obstacle by steps A reaches the predeterminable range dangerous values; And in one period delay time, detect the vehicle body crash acceleration by step B and reach default dangerous values, then described control module is controlled described air bag module igniting, inflation.
The distance that reaches pre-set velocity dangerous values and target obstacle as if the speed of judging target obstacle by steps A reaches the predeterminable range dangerous values, then also carries out following steps:
D. safety strap control circuit control safety strap control motor rotation, tighten seat belt fast; In certain time interval, the safety strap of having strained is loosened in the contrarotation of described safety strap control circuit control safety strap control motor.
Owing to, realized not colliding front safety belt and just begun tension, thereby made passengers inside the car obtain better protection just directly not starting safety strap control motor operations before the collision.
Compared with prior art, the present invention realized point of ignition in advance, realized simultaneously before collision not having protected passenger safety effectively with regard to tighten seat belt.
Description of drawings
Fig. 1 is the structural representation that the nearly thoughts and feelings of the present invention is sent out the safety air bag example I;
Fig. 2 is that Doppler signal amplitude of the present invention changes scheme drawing with relative distance;
Fig. 3 is the structural representation of microwave sounding of the present invention unit;
Fig. 4 is the structural representation that the nearly thoughts and feelings of the present invention is sent out the safety air bag example II;
Fig. 5 is the structural representation that the nearly thoughts and feelings of the present invention is sent out the safety air bag EXAMPLE III.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Example I.With reference to Fig. 1.A kind of nearly thoughts and feelings is sent out safety air bag, comprises speed and range sensing module 1, acceleration pick-up 2, control module 3 and air bag module 4; Whether the distance whether speed that described speed and range sensing module 1 are used for detection of a target obstacle reaches pre-set velocity dangerous values and target obstacle reaches the predeterminable range dangerous values, described control module 3 links to each other with range sensing module 1 and described acceleration pick-up 2 with described speed, be used to receive the signal that described speed and range sensing module 1 and described acceleration pick-up 2 are sent, described control module 3 also links to each other with described air bag module 4, and described air bag module 4 is controlled.Before not colliding, the relative velocity that detects target obstacle when described speed and range sensing module 1 surpasses pre-set velocity dangerous values (as 30km/h), and when the distance of target obstacle reaches predeterminable range dangerous values (as 5cm-15cm), promptly send an impulse singla and give control module 3; If (this time gap is roughly by pre-set velocity dangerous values and the decision of predeterminable range dangerous values in very short time gap, as working as the pre-set velocity dangerous values is 30km/h, and when the predeterminable range dangerous values is 30cm, need 36ms approximately with the speed of the 30km/h 30cm that passes by, this time gap is promptly got 36ms), described control module 3 also receives the slight crash acceleration signal that acceleration pick-up 2 transmits, as 2g, then control module 3 is controlled air bag module 4 ignition and detonations and inflation immediately, thereby has realized shifting to an earlier date of point of ignition.As seen, the generation of igniting action must detect speed, and distance and acceleration/accel danger signal have also been avoided the generation of mis-ignition.
Described nearly thoughts and feelings is sent out safety air bag and is also comprised the safety strap module 5 that links to each other with range sensing module 1 mouth with described speed, described safety strap module 5 comprises safety strap control circuit, safety strap control motor 52 and safety strap 53, described safety strap control circuit links to each other with described safety strap control motor 52, and described safety strap control motor 52 is controlled the tension of safety strap 53 and loosened.The relative velocity that detects target obstacle when described speed and range sensing module 1 surpasses the pre-set velocity dangerous values, and when the distance of target obstacle reaches the predeterminable range dangerous values, except impulse singla being exported to the control module 3, also give the safety strap control circuit with this signal output.Described safety strap control circuit adopts can produce the positive negative pulse stuffing circuit 51 that two-way is independently exported.Control safety strap control motor 52 respectively by the two-way pulse output of positive negative pulse stuffing circuit 51 and rotate and reverse, drive safety strap 53 tensions then respectively and loosen.Particularly, after described positive negative pulse stuffing circuit 51 receives the impulse singla that described speed and range sensing module 1 send, at first produce a positive highpowerpulse by first mouth, moment promotes safety strap control motor 52 high speed revolutions, this moment, safety strap 53 was strained fast, and time length is about 0.1-0.2s; The 1.5s that delays time approximately behind this positive highpowerpulse, second mouth of described positive negative pulse stuffing circuit 51 produces a negative highpowerpulse, allows 52 counter-rotatings of safety strap control motor, loosens the safety strap of having strained 53.For fear of chain of rings collision, so between two pulses the regular hour time-delay must be arranged, safety strap 53 continues just can loosen after tension a period of time.
Example II.With reference to Fig. 2-Fig. 4.Same example I, described nearly thoughts and feelings are sent out safety air bag and are comprised speed and range sensing module 1, acceleration pick-up 2, control module 3 and air bag module 4 and safety strap module 5.Speed in the present embodiment and range sensing module 1 are based on that doppler principle on the physics makes.When vehicle front is launched the probing wave of directional beam, if the place ahead obstacle is toward or away from relatively, the wavelength of the echoed signal that reflects has a little difference, and the difference on the frequency of launching He receive is Doppler frequency Fg(
, wherein v is a vehicle forward direction speed,
Be two thing lines and vehicle forward direction angle,
Be the probing wave wavelength), visible Doppler frequency size is decided by the relative velocity of two mobiles, according to the big or small relative velocity size that just can judge two articles of Doppler frequency, has also just determined the energy that bump is produced.During short-range detecting, Doppler signal amplitude U and target relative distance R are inverse relation, i.e. U=K/R, and K is the constant relevant with the probing wave system, as shown in Figure 2, can reflect the dangerous degree of closeness of vehicle-to-target obstacle by the Doppler signal amplitude.
Described speed and range sensing module 1 comprise microwave sounding unit 11, are used to produce the Doppler signal relevant with the relative velocity of target obstacle; Filter 12, the Doppler signal that is used to make relative velocity surpass the pre-set velocity dangerous values passes through and amplification; Signal amplitude discriminating unit 13 is used for further detecting the Doppler signal amplitude, whether reaches the predeterminable range dangerous values with the distance of judging target obstacle.
Described microwave sounding unit 11 comprises projector 111, receptor 112, solid state microwave source 114, isolator 115 and frequency mixer 116; Described projector 111 links to each other with described solid state microwave source 114, is used for the microwave signal of certain frequency is outwards launched; Described receptor 112 is used for the echoed signal that the receiving target obstacle reflects; Described isolator 115 is a ferrite component, forward can pass through the big signal of intensity under the effect of magnetic field, only can allow very little leakage signal pass through when oppositely connecting, here oppositely be connected in isolator 115 in the circuit exactly, its negative pole is linked to each other with solid state microwave source 114, positive pole links to each other with the first input end of frequency mixer 116, makes very little a part of microwave signal arrive the first input end of frequency mixers 116 as local vibration source by isolator 115; Second input end of described frequency mixer 116 links to each other with receptor 112, and mouth links to each other with filter 12.Like this, carrying out mixing by the first input end of frequency mixer 116 and the different signal of two frequencies of second input end input in frequency mixer 116, have a difference frequency to produce in the mixing results, is exactly so-called Doppler signal.Described projector 111 can adopt little band emitting antenna, and correspondingly described receptor 112 can adopt Microstrip Receiving Antenna, and described microwave sounding unit 11 is made into microstrip IC.The number of described little band emitting antenna and described Microstrip Receiving Antenna is at least two.According to safe automobile air bag to the detection direction requirement, but the bumper/spoiler both sides are installed by microwave sounding unit 11 and meet requirements respectively foremost at vehicle.
Described microwave sounding unit 11 also comprises the quantizer 113 that links to each other with described solid state microwave source 114, adopt quantizer 113 to make solid state microwave source 114 pulse launched microwave signals, the impulse singla that produces certain pulsewidth and repeated freqnency is also outwards launched by projector 111.In the duration of pulse, receptor 112 can only receive the interior echoed signal of certain distance in order to the generation Doppler signal like this, thereby has got rid of the influence of other environment beyond the certain distance.For example, suppose that the modulation pulsewidth is chosen to be 0.05 microsecond, in 0.05 microsecond, microwave only can be propagated the distance of 7.5m.Have only like this 7.5m rice distance interior echoed signal could produce Doppler signal.And when distance during greater than 7.5m, the echoed signal of this moment is in the local vibration source halted state, does not produce Doppler signal in frequency mixer 115, has so just got rid of the 7.5m external interference of any reflectance target in addition.Certainly suitable impulse modulation pulsewidth can also be set as required, the interference of the surrounding environment beyond the 2-3m is removed.
After described microwave sounding unit 11 produces Doppler signal, by filter 12 Doppler signal that relative velocity surpasses the pre-set velocity dangerous values is passed through and amplification, and other frequencies are filtered.For example: supposition microwave operating wavelength
Be 3cm, and vehicle-to-target obstacle kinematic velocity direction faces (being cos θ=1), can extrapolate:
When relative velocity is 30km/h, Fg=555Hz;
When relative velocity is 200km/h, Fg=3700Hz.
Described filter 12 can adopt high-pass filter, frequency signal more than the 555Hz is passed through and amplification, the relative velocity of expression target obstacle (can certainly select for use bandpass filter to replace high-pass filter more than 30km/h, frequency signal in the 555Hz-3700Hz scope is passed through and amplification, the relative velocity of expression target obstacle is in the 30km/h-200km/h scope), the speed of so just judging target obstacle has indirectly reached the pre-set velocity dangerous values.The Doppler signal that relative velocity is surpassed the pre-set velocity dangerous values by filter 12 by and amplify after, further detect the Doppler signal amplitudes by signal amplitude discriminating unit 13 again.Described signal amplitude discriminating unit 13 comprises first detector 131 and voltage comparator 132.After first detector 131 detections, compare the peak voltage of Doppler signal and the default threshold voltage size of voltage comparator 132 by voltage comparator 132 again.As can be seen from Figure 2, the Doppler signal amplitude sharply increases near target the time, and the big I of signal amplitude is represented the relative distance distance of target obstacle like this.In only (supposition during several wavelength of distance objective obstacle
Be 3cm), its signal amplitude increases to the voltage magnitude from millivolt, at this moment but setting voltage value U1 is the default threshold voltage of voltage comparator 132, in case the peak voltage of Doppler signal surpasses U1, the distance that then shows the target obstacle of relative velocity more than 30km/h has reached predeterminable range dangerous values R1, and control module 3 is given in pulse of voltage comparator 132 outputs.Described control module 3 can adopt AND circuit.If open the utmost point in the short time at the impulse singla door of voltage comparator 132, control module 3 receives the slight crash acceleration signal that acceleration pick-up 2 transmits again, as 2g, then control module 3 is controlled air bag module 4 ignition and detonations and inflation immediately, thereby has realized shifting to an earlier date of point of ignition.When the peak voltage of Doppler signal surpassed the default threshold voltage U1 of voltage comparator 132, described voltage comparator 132 was also exported to safety strap module 5 with this impulse singla except that impulse singla being exported to the control module 3.The action principle of described safety strap module 5 is identical with example I.
EXAMPLE III.With example I and example II, described nearly thoughts and feelings is sent out safety air bag and is comprised speed and range sensing module 1, acceleration pick-up 2, control module 3 and air bag module 4 and safety strap module 5.With reference to Fig. 5, with example II different be, described speed and range sensing module 1 comprise: the microwave sounding unit 11 that is used to produce Doppler signal, be used to judge whether the speed of target obstacle reaches the frequency detecting unit 12 of pre-set velocity dangerous values, be used to detect whether the Doppler signal amplitude reaches the predeterminable range dangerous values with the distance of judging target obstacle signal amplitude discriminating unit 13 and control setup 14; The input end of described frequency detecting unit 12 and described signal amplitude discriminating unit 13 links to each other with described microwave sounding unit 11 respectively, and mouth links to each other with described control setup 14 respectively; Described control setup 14 links to each other with described control module 3.In the present embodiment, behind described microwave sounding unit 11 generation Doppler signals, judge respectively that by the two-way device whether the speed of target obstacle and distance reach corresponding dangerous values respectively again: the one tunnel is the frequency detecting unit 12 that the Doppler signal that is used to make relative velocity surpass the pre-set velocity dangerous values passes through, and another road is to be used to detect whether the Doppler signal amplitude reaches the predeterminable range dangerous values with the distance of judging target obstacle signal amplitude discriminating unit 13.Described frequency detecting unit comprises filter 121 and second detector 122; With similar in the example II, described filter 121 can adopt high-pass filter, signal more than the certain frequency size is passed through and amplification, and more than the pre-set velocity dangerous values, the speed of judging target obstacle has indirectly reached the pre-set velocity dangerous values to the relative velocity of expression target obstacle; By second detector 122 detections, signal of second detector 122 inputs is given described control setup 14 again.Described signal amplitude discriminating unit 13 comprises first detector 131 and voltage comparator 132; After first detector 131 detections, compare the peak voltage of Doppler signal and the default threshold voltage size of voltage comparator 132 by voltage comparator 132 again.If the peak voltage of Doppler signal surpasses the default threshold voltage size of voltage comparator 132, show that then the distance of target obstacle has reached the predeterminable range dangerous values, signal of voltage comparator 132 outputs is given described control setup 14.Described control setup 14 can adopt AND circuit, if described control setup 14 receives the danger signal of two-way device input simultaneously, impulse singla of 14 output of described control setup is given described control module 3 and described safety strap module 5.Identical in the principle of work of described air bag module 4 gas filed working processs of igniting of described control module 3 controls and described safety strap module 5 and the example II no longer repeated at this.
EXAMPLE IV.The present invention also comprises and a kind ofly utilizes above-mentioned nearly thoughts and feelings to send out the method that safety air bag carries out safety control, may further comprise the steps:
A. speed and range sensing: whether the distance whether speed of described speed and range sensing module detection of a target obstacle reaches pre-set velocity dangerous values and target obstacle reaches the predeterminable range dangerous values;
B. crash acceleration detects: detect the vehicle body crash acceleration by described acceleration pick-up and whether reach default dangerous values;
C. the distance that reaches pre-set velocity dangerous values and target obstacle when the speed of judging target obstacle by steps A reaches the predeterminable range dangerous values; And in one period delay time, detect the vehicle body crash acceleration by step B and reach default dangerous values, then described control module is controlled described air bag module igniting, inflation.
When adopting speed described in the example II and range sensing module 1, above-mentioned steps A comprises step:
A1. produce Doppler frequency by microwave sounding unit 11, to judge the relative velocity size of target obstacle;
B1. by filter 12 make more than the certain frequency Doppler signal by and amplify;
C1. carry out detection by first detector 131, and further compare the default threshold voltage size of Doppler's signal amplitude size and voltage comparator 132 by voltage comparator 132.
When adopting speed described in the EXAMPLE III and range sensing module 1, above-mentioned steps A comprises step:
A2. produce Doppler frequency by microwave sounding unit 11;
B2. by filter 121 and second detector 122 make more than the certain frequency Doppler signal by and amplify;
C2. carry out detection by first detector 131, and compare the default threshold voltage size of Doppler's signal amplitude size and voltage comparator 132 by voltage comparator 132;
D2. control setup 14 receives the output signal of second detector 122 and voltage comparator 132 simultaneously.
The distance that reaches pre-set velocity dangerous values and target obstacle as if the speed of judging target obstacle by steps A reaches the predeterminable range dangerous values, then also carries out following steps:
D. safety strap control circuit control safety strap control motor rotation, tighten seat belt fast; In certain time interval, the safety strap of having strained is loosened in the contrarotation of described safety strap control circuit control safety strap control motor.
Owing to just directly not starting safety strap control motor operations before the collision, realized not colliding front safety belt and just begun tension, passengers inside the car are better protected.
Above content is to have described concrete preferred implementation of the present invention in conjunction with the accompanying drawings, but can not assert that concrete enforcement of the present invention only is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (12)
1. a nearly thoughts and feelings is sent out safety air bag, it is characterized in that: comprise speed and range sensing module, acceleration pick-up, control module and air bag module; Whether the distance whether speed that described speed and range sensing module are used for detection of a target obstacle reaches pre-set velocity dangerous values and target obstacle reaches the predeterminable range dangerous values, described control module links to each other with range sensing module and described acceleration pick-up with described speed, be used to receive the signal that described speed and range sensing module and described acceleration pick-up are sent, described control module also links to each other with described air bag module, and described air bag module is controlled.
2. nearly thoughts and feelings as claimed in claim 1 is sent out safety air bag, it is characterized in that: described speed and range sensing module comprise: the microwave sounding unit is used to produce Doppler signal; Filter, the Doppler signal that is used to make speed surpass the pre-set velocity dangerous values passes through and amplification; The signal amplitude discriminating unit is used for further detecting the Doppler signal amplitude, whether reaches the predeterminable range dangerous values with the distance of judging target obstacle.
3. nearly thoughts and feelings as claimed in claim 1 is sent out safety air bag, it is characterized in that: described speed and range sensing module comprise: the microwave sounding unit that is used to produce Doppler signal, be used to judge whether the speed of target obstacle reaches the frequency detecting unit of pre-set velocity dangerous values, be used to detect the Doppler signal amplitude and whether reach the signal amplitude discriminating unit of predeterminable range dangerous values and control setup with the distance of judging target obstacle; The input end of described frequency detecting unit and described signal amplitude discriminating unit links to each other with described microwave sounding unit respectively, and mouth links to each other with described control setup respectively; Described control setup links to each other with described control module.
4. send out safety air bag as claim 2 or 3 described nearly thoughts and feelings, it is characterized in that: described microwave sounding unit comprises projector, receptor, solid state microwave source, isolator and frequency mixer; Described projector links to each other with described solid state microwave source; The negative pole of described isolator links to each other with the solid state microwave source, and positive pole links to each other with the first input end of frequency mixer; Second input end of described frequency mixer links to each other with receptor.
5. nearly thoughts and feelings as claimed in claim 4 is sent out safety air bag, it is characterized in that: described microwave sounding unit also comprises the quantizer that links to each other with described solid state microwave source.
6. send out safety air bag as claim 2 or 3 described nearly thoughts and feelings, it is characterized in that: described signal amplitude discriminating unit comprises first detector and voltage comparator.
7. nearly thoughts and feelings as claimed in claim 3 is sent out safety air bag, it is characterized in that: described frequency detecting unit comprises filter and second detector.
8. send out safety air bag as each described nearly thoughts and feelings of claim 1 to 3, it is characterized in that: described control module adopts AND circuit.
9. send out safety air bag as each described nearly thoughts and feelings of claim 1 to 3, it is characterized in that: also comprise the safety strap module that links to each other with range sensing module mouth with described speed, described safety strap module comprises safety strap control circuit, safety strap control motor and safety strap, described safety strap control circuit links to each other with described safety strap control motor, and described safety strap control motor is controlled the tension of safety strap and loosened.
10. nearly thoughts and feelings as claimed in claim 9 is sent out safety air bag, it is characterized in that: described safety strap control circuit adopts can produce the positive negative pulse stuffing circuit that two-way is independently exported.
11. one kind is utilized the described nearly thoughts and feelings of claim 1 to send out the method that safety air bag carries out safety control, it is characterized in that: may further comprise the steps:
A. speed and range sensing: whether the distance whether speed of described speed and range sensing module detection of a target obstacle reaches pre-set velocity dangerous values and target obstacle reaches the predeterminable range dangerous values;
B. crash acceleration detects: detect the vehicle body crash acceleration by described acceleration pick-up and whether reach default dangerous values;
C. the distance that reaches pre-set velocity dangerous values and target obstacle when the speed of judging target obstacle by steps A reaches the predeterminable range dangerous values; And in one period delay time, detect the vehicle body crash acceleration by step B and reach default dangerous values, then described control module is controlled described air bag module igniting, inflation.
12. method as claimed in claim 11 is characterized in that: the distance that reaches pre-set velocity dangerous values and target obstacle as if the speed of judging target obstacle by steps A reaches the predeterminable range dangerous values, then also carries out following steps:
D. safety strap control circuit control safety strap control motor rotation, tighten seat belt fast; In certain time interval, the safety strap of having strained is loosened in the contrarotation of described safety strap control circuit control safety strap control motor.
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| CN 201110102184 CN102180139A (en) | 2011-04-22 | 2011-04-22 | Proximity trigger safety air bag and safety control method thereof |
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| CN 201110102184 Pending CN102180139A (en) | 2011-04-22 | 2011-04-22 | Proximity trigger safety air bag and safety control method thereof |
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| CN (1) | CN102180139A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102541016A (en) * | 2012-01-11 | 2012-07-04 | 沈阳中科正方新能源技术有限公司 | Intelligent vehicle controller |
| CN115482217A (en) * | 2022-09-21 | 2022-12-16 | 内蒙古科电数据服务有限公司 | Electric shock prevention video detection method for transformer substation based on Gaussian mixture model separation algorithm |
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| CN200964090Y (en) * | 2006-11-15 | 2007-10-24 | 刘加友 | Automobile collision presentiment device |
| CN101962003A (en) * | 2009-07-22 | 2011-02-02 | 株式会社京滨 | Passenger protection control setup, occupant restraint system and passenger protection control method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200964090Y (en) * | 2006-11-15 | 2007-10-24 | 刘加友 | Automobile collision presentiment device |
| CN101962003A (en) * | 2009-07-22 | 2011-02-02 | 株式会社京滨 | Passenger protection control setup, occupant restraint system and passenger protection control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541016A (en) * | 2012-01-11 | 2012-07-04 | 沈阳中科正方新能源技术有限公司 | Intelligent vehicle controller |
| CN102541016B (en) * | 2012-01-11 | 2014-10-08 | 沈阳中科正方新能源技术有限公司 | Intelligent vehicle controller |
| CN115482217A (en) * | 2022-09-21 | 2022-12-16 | 内蒙古科电数据服务有限公司 | Electric shock prevention video detection method for transformer substation based on Gaussian mixture model separation algorithm |
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Application publication date: 20110914 |