阅读说明：本技术 一种频率可调的海浪能发电装置及其发电方法 (A kind of adjustable ocean wave energy generating set of frequency and its electricity-generating method ) 是由 许明 何龙 陈国金 于 2019-08-27 设计创作，主要内容包括：本发明公开了一种频率可调的海浪能发电装置及其发电方法。海浪的低频与频率多变的特性,极大的影响力对海浪能的收集效率。本发明一种频率可调的海浪能发电装置,包括内部壳体、壳体端盖、振子系统和振荡发电机构。振子系统包括振荡弹簧、振子管、振子端盖、伸缩气囊和推力单元。压电发电单元包括弓形拉伸板、柔性板、矩形垫块和压电片。本发明通过设置多块依次间隔排列的第一永磁铁能够将低频海浪转换为频率更高的机械振动,从而提高能量收集效率,克服了由于海浪频率低造成能量收集效率低的问题。本发明可通过控制可伸缩气囊内的气压大小,调节杠杆振动频率,使得振动频率趋近于共振频率,从而提高能量收集效率。(The invention discloses a kind of adjustable ocean wave energy generating set of frequency and its electricity-generating methods.The low frequency and the changeable characteristic of frequency of wave, collection efficiency of the strong influence power to sea wave energy.A kind of adjustable ocean wave energy generating set of frequency of the present invention, including inner shell, housing end plug, oscillator system and oscillation power generation mechanism.Oscillator system includes oscillation spring, oscillator pipe, oscillator end cap, extension airbag and thrust unit.Piezo-electric generating unit includes arch drawing plate, flexible board, rectangle cushion block and piezoelectric patches.Low frequency wave can be converted to the higher mechanical oscillation of frequency by the first permanent magnet that setting muti-piece is sequentially arranged at intervals and overcome the problem for causing efficiency of energy collection low since wave frequencies are low to improve efficiency of energy collection by the present invention.The present invention can adjust lever vibration frequency by controlling the air pressure size in scalable air bag, so that vibration frequency levels off to resonant frequency, to improve efficiency of energy collection.)

1. a kind of adjustable ocean wave energy generating set of frequency, including inner shell, housing end plug, oscillator system and Oscillatory generator Structure；It is characterized by: the both ends of two housing end plugs and inner shell inner sidewall are fixed respectively；Oscillator system is arranged in inner shell In vivo；The oscillator system includes oscillation spring, oscillator pipe, oscillator end cap, extension airbag and thrust unit；Oscillator pipe it is interior Extension airbag is housed in chamber；M groups of slots is offered on the side wall of oscillator pipe；M groups of slots and m thrust unit are right respectively It answers；Thrust unit by multiple first permanent magnet groups for being axially arranged successively along oscillator pipe at；Each first permanent magnet with flexible gas The side of capsule is fixed；The medial surface of two oscillator end caps and the both ends of oscillator pipe are fixed respectively；Two oscillation spring one end with The medial surface of two housing end plugs is fixed respectively, and the lateral surface of the other end and two oscillator end caps is fixed respectively；

M relief hole is offered on the side wall of the inner shell, oscillation power generation mechanism shares m；M oscillation power generation mechanism with M thrust unit respectively corresponds；Oscillation power generation mechanism includes the second permanent magnet, sliding block, buffer spring, lever and piezo-electric generating list Member；Sliding block passes through relief hole；The medial surface of sliding block is fixed with the second permanent magnet；Magnetic of second permanent magnet towards corresponding thrust unit Pole is identical towards the corresponding pole polarity of second permanent magnet as the first permanent magnet；

The piezo-electric generating unit includes arch drawing plate, flexible board, rectangle cushion block and piezoelectric patches；Two pieces of arch drawing plates Concave side is oppositely arranged；Flexible board is provided between two pieces of arch drawing plates；Piezoelectric patches is provided on flexible board；One of bow The lateral surface of shape drawing plate and inner shell is fixed；The middle part of lever and inner shell are hinged；One end of lever and sliding block it is outer Side is connected by buffer spring, and the other end is fixed with that block arch drawing plate far from inner shell.

2. the adjustable ocean wave energy generating set of a kind of frequency according to claim 1, it is characterised in that: further include inflation Pump, exhaust pump and air accumulator；Inflator pump, exhaust pump and air accumulator are arranged between package casing and inner shell；Flexible gas There are two ports for setting on capsule；The input port of inflator pump and the gas outlet of air accumulator connect, and the first of delivery outlet and extension airbag A port is connected by hose；Second port of the input port of exhaust pump and extension airbag is connected by hose, delivery outlet with The air inlet of air accumulator connects.

3. the adjustable ocean wave energy generating set of a kind of frequency according to claim 1, it is characterised in that: a kind of frequency of the present invention The adjustable ocean wave energy generating set of rate further includes energy collection circuit；Energy collection circuit includes rectifier, current sensor, electricity Pressure sensor and battery；Every piezoelectric patches corresponds to a rectifier；Two input terminals of rectifier and corresponding piezoelectric patches Two terminals be separately connected；The cathode output end of all rectifiers is connected with anode, cathode output end with electricity Pond cathode is connected；Current sensor is connected between anode and the cathode output end of rectifier；Two of voltage sensor The cathode output end of terminals and rectifier, cathode output end are respectively connected with.

4. the adjustable ocean wave energy generating set of a kind of frequency according to claim 1, it is characterised in that: the flexible gas Capsule is formed by being arranged successively the dish-shaped gas bag unit of connected 2n+1；Groups of slots include along oscillator pipe axial direction be arranged successively One sliding slot, medial launder and second sliding slot；The length direction of first sliding groove and second sliding slot is parallel to the axis of oscillator pipe；One pushes away 2n+1 the first permanent magnets are shared in power unit；2n+1 dish-shaped gas bag unit on 2n+1 the first permanent magnets and extension airbag Edge is fixed respectively；It is located in the middle the medial launder that the first permanent magnet passes through respective grooves group；It is located in the middle the first permanent magnetism N the first permanent magnets of iron side are arranged in first sliding groove；It is located in the middle n the first permanent magnetism of the first permanent magnet other side Iron is arranged in second sliding slot.

5. the adjustable ocean wave energy generating set of a kind of frequency according to claim 1, it is characterised in that: two pieces of arch stretch Muti-piece flexible board is provided between plate；Each flexible board is sequentially arranged at intervals setting；It is all provided between any two pieces of adjacent flexible boards It is equipped with two pieces of rectangle cushion blocks；Two pieces of rectangle cushion blocks are located at the both ends of flexible board.

6. the adjustable ocean wave energy generating set of a kind of frequency according to claim 1, it is characterised in that: a kind of frequency of the present invention The adjustable ocean wave energy generating set of rate further includes package casing and encapsulation end cap；The both ends of package casing inner wall and two potted ends Lid is fixed respectively；Inner shell is arranged in package casing.

7. a kind of electricity-generating method of the adjustable ocean wave energy generating set of frequency as described in claim 1, it is characterised in that: work as sea Wave pushes oscillator pipe persistently to shake, and drives each thrust unit continual reciprocation；Multiple first permanent magnets on each thrust unit Successively pass through and pushes corresponding second permanent magnet；Second permanent magnet pushes lever rotation；Lever extruding piezo-electric generating unit, piezoelectricity Each piezoelectric patches in generator unit tension under the deformation of two pieces of arch drawing plates, so that each piezoelectric patches exports electric energy；Often An aeration quantity is carried out every T time to adjust；

The method that aeration quantity is adjusted is as follows:

Step 1: the aeration quantity range of setting extension airbag, and by extension airbag to the lower limit of aeration quantity range；

Step 2: Miniature inflatable pump startup, is inflated extension airbag, so that extension airbag extends, two neighboring first forever The spacing of magnet increases；In gas replenishment process, current sensor, voltage sensor persistently detect the voltage and electricity of input battery respectively Stream, and to gained voltage and current quadrature, generate generated output change curve；

Step 3: determining the corresponding extension airbag aeration quantity in generated output highest point in generated output change curve；This is filled Tolerance is as target aeration quantity；

Step 4: miniature exhaust pump startup, the gas in extension airbag is extracted out, until the aeration quantity in extension airbag reaches mesh Mark aeration quantity.

Technical field

The invention belongs to energy regeneratings to utilize technical field, and in particular to a kind of adjustable ocean wave energy generating set of frequency and Its electricity-generating method.

Background technique

Nowadays, about the unlimited demand of the energy, many researchs all concentrate on collection of energy.These research main purposes be Useful energy is generated from the energy of waste.Ocean wave energy is one of huge energy, energy density be higher than solar energy and Some renewable resources such as wind energy.But most Wave energy is not used but and is wasted in life.By It is lower in the frequency of wave therefore less to the attention for obtaining the energy based on vibration from this energy resource.

Hydrospace detection equipment be usually long-term work in the case where unattended, for using battery-powered equipment its Working life is limited by the electricity of battery, and working life is relatively limited.Sea wave energy is a kind of marine renewable energy abundant, will It is converted into electric energy and may be implemented to provide energy (i.e. self-powered) at any time and incessantly for hydrospace detection equipment.

Due to the low frequency and the changeable characteristic of frequency of wave, strong influence power is big at present to the collection efficiency of sea wave energy Part sea wave energy collection device can only often solve the problems, such as one of, can not maximize collection Wave energy, therefore the present invention mentions A kind of low frequency has been supplied to turn high frequency and the adjustable Wave energy collection device of frequency and method.

Summary of the invention

The purpose of the present invention is to provide a kind of adjustable ocean wave energy generating set of frequency and its electricity-generating methods.

A kind of adjustable ocean wave energy generating set of frequency of the present invention, including inner shell, housing end plug, oscillator system and vibration Swing power generation mechanism.The both ends of two housing end plugs and inner shell inner sidewall are fixed respectively.Oscillator system is arranged in inner shell It is interior.The oscillator system includes oscillation spring, oscillator pipe, oscillator end cap, extension airbag and thrust unit.The inner cavity of oscillator pipe In be equipped with extension airbag；M groups of slots is offered on the side wall of oscillator pipe.M groups of slots is respectively corresponded with m thrust unit. Thrust unit by multiple first permanent magnet groups for being axially arranged successively along oscillator pipe at.Each first permanent magnet with extension airbag Side is fixed.The medial surface of two oscillator end caps and the both ends of oscillator pipe are fixed respectively.Two oscillation spring one end with two The medial surface of housing end plug is fixed respectively, and the lateral surface of the other end and two oscillator end caps is fixed respectively.

M relief hole is offered on the side wall of the inner shell, oscillation power generation mechanism shares m.M Oscillatory generator Structure is respectively corresponded with m thrust unit.Oscillation power generation mechanism includes the second permanent magnet, sliding block, buffer spring, lever and piezoelectricity hair Electric unit.Sliding block passes through relief hole.The medial surface of sliding block is fixed with the second permanent magnet.The corresponding thrust unit of second permanent magnet direction Magnetic pole and the first permanent magnet it is identical towards the corresponding pole polarity of second permanent magnet.

The piezo-electric generating unit includes arch drawing plate, flexible board, rectangle cushion block and piezoelectric patches.Two pieces of arch stretch The concave side of plate is oppositely arranged.Flexible board is provided between two pieces of arch drawing plates.Piezoelectric patches is provided on flexible board.Wherein one The lateral surface of block arch drawing plate and inner shell is fixed.The middle part of lever and inner shell are hinged.One end of lever and sliding block Lateral surface connected by buffer spring, that block arch drawing plate of the other end and separate inner shell is fixed.

Preferably, a kind of adjustable ocean wave energy generating set of frequency of the present invention further includes inflator pump, exhaust pump and gas storage Tank.Inflator pump, exhaust pump and air accumulator are arranged between package casing and inner shell.There are two gas for setting on extension airbag Mouthful.The input port of inflator pump and the gas outlet of air accumulator connect, and first port of delivery outlet and extension airbag is connected by hose It connects.The input port of exhaust pump and second port of extension airbag are connected by hose, and the air inlet of delivery outlet and air accumulator connects It connects.

Preferably, a kind of adjustable ocean wave energy generating set of frequency of the present invention further includes energy collection circuit.Energy is received Collector includes rectifier, current sensor, voltage sensor and battery.Every piezoelectric patches corresponds to a rectifier.Rectification Two input terminals of device are separately connected with two terminals of corresponding piezoelectric patches.The cathode output end of all rectifiers with Anode is connected, and cathode output end is connected with battery cathode.Current sensor is being connected on anode and rectifier just Between the output end of pole.Two terminals of voltage sensor and cathode output end, the cathode output end of rectifier are respectively connected with.

Preferably, the extension airbag is formed by being arranged successively the dish-shaped gas bag unit of connected 2n+1.Groups of slots Including first sliding groove, medial launder and the second sliding slot being arranged successively along the axial direction of oscillator pipe.The length of first sliding groove and second sliding slot Degree is oriented parallel to the axis of oscillator pipe.2n+1 the first permanent magnets are shared in one thrust unit.2n+1 the first permanent magnets It is fixed respectively with 2n+1 dish-shaped gas bag unit edge on extension airbag.It is located in the middle the first permanent magnet and passes through corresponding ditch The medial launder of slot group.N the first permanent magnets for being located in the middle the first permanent magnet side are arranged in first sliding groove.Positioned at centre N the first permanent magnets of the first permanent magnet other side be arranged in second sliding slot.

Preferably, being provided with muti-piece flexible board between two pieces of arch drawing plates.Each flexible board is sequentially arranged at intervals setting. Two pieces of rectangle cushion blocks are provided between any two pieces of adjacent flexible boards.Two pieces of rectangle cushion blocks are located at the two of flexible board End.

Preferably, a kind of adjustable ocean wave energy generating set of frequency of the present invention further includes package casing and encapsulation end cap. The both ends of package casing inner wall are fixed respectively with two encapsulation end caps.Inner shell is arranged in package casing.

The electricity-generating method of the adjustable ocean wave energy generating set of the frequency is specific as follows:

When wave push oscillator pipe persistently shake, drive each thrust unit continual reciprocation.It is more on each thrust unit A first permanent magnet successively passes through and pushes corresponding second permanent magnet；Second permanent magnet pushes lever rotation.Lever extruding piezoelectricity Generator unit, each piezoelectric patches in piezo-electric generating unit tension under the deformation of two pieces of arch drawing plates, so that each piezoelectricity Piece exports electric energy.An aeration quantity is carried out every T time to adjust.

The method that aeration quantity is adjusted is as follows:

Step 1: the aeration quantity range of setting extension airbag, and by extension airbag to the lower limit of aeration quantity range.

Step 2: Miniature inflatable pump startup, is inflated extension airbag, so that extension airbag extends, two neighboring the The spacing of one permanent magnet increases.In gas replenishment process, current sensor, voltage sensor persistently detect the voltage of input battery respectively And electric current, and to gained voltage and current quadrature, generate generated output change curve.

Step 3: determining the corresponding extension airbag aeration quantity in generated output highest point in generated output change curve.It will The aeration quantity is as target aeration quantity.

Step 4: miniature exhaust pump startup, the gas in extension airbag is extracted out, until the aeration quantity in extension airbag reaches To target aeration quantity.

The invention has the advantages that:

1, low frequency wave can be converted to frequency by the way that the first permanent magnet that muti-piece is sequentially arranged at intervals is arranged by the present invention Higher mechanical oscillation overcome to improve efficiency of energy collection and cause efficiency of energy collection low since wave frequencies are low Problem.

2, the present invention can be adjusted between the first permanent magnet by controlling air pressure (being filled with gas flow) size in scalable air bag Away to realize adjusting to lever vibration frequency, so that vibration frequency levels off to resonant frequency, to improve collection of energy effect Rate.

3, the present invention is amplified power by lever and bow-shaped structural, acts on piezo-electric generating unit, is improved energy and is received Collect efficiency.

4, the present invention can be used for the long-term power supply of the electronic equipments such as marine sensor network, monitoring device, greatly reduce The use cost of marine electronic equipment.

Detailed description of the invention

Fig. 1 is encapsulation schematic diagram of the invention；

Fig. 2 is the structural schematic diagram removed after encapsulation of the invention；

Fig. 3 is the structural schematic diagram of oscillator system in the present invention；

Fig. 4 is the structural schematic diagram of oscillation power generation mechanism in the present invention；

Fig. 5 is the structural schematic diagram of piezo-electric generating unit in the present invention.

Specific embodiment

Below in conjunction with attached drawing, the invention will be further described.

As illustrated in fig. 1 and 2, the adjustable ocean wave energy generating set of a kind of frequency, including package casing 1, encapsulation end cap 2, interior Portion's shell 3, housing end plug 4, oscillator system, inflator pump, exhaust pump, air accumulator, oscillation power generation mechanism and energy collection circuit.Envelope The both ends of 1 inner wall of casing are fixed respectively with two encapsulation end caps 2, form the shell of the adjustable ocean wave energy generating set of the frequency Body plays encapsulation effect, prevents seawater from penetrating into for carrying other elements.Inner shell 3 is arranged in package casing；It is internal Have gap between the lateral surface of shell 3 and the medial surface of package casing, for install oscillation power generation mechanism, Mini-size inflation pump and Miniature exhaust pump.The both ends of two housing end plugs 4 and 3 inner sidewall of inner shell are fixed respectively.Oscillator system is arranged in inner shell In body 3.

As shown in figure 3, oscillator system includes oscillation spring 16, oscillator pipe 17, oscillator end cap 18, extension airbag 20 and thrust Unit.Extension airbag 20 is housed in the inner cavity of oscillator pipe 17；Extension airbag 20 is by being arranged successively the dish-shaped air bag of connected 2n+1 Unit composition, n=3.The mid diameter of dish-shaped gas bag unit is big, and both ends diameter is small.When the inflation of extension airbag Unit 20, due to The axial expansion of each dish air bag, extension airbag 20 will be axially elongated.It is offered on the side wall of oscillator pipe 17 along oscillator pipe Circumferentially uniformly distributed four groups of slots of 17 central axis.Groups of slots includes the first cunning being arranged successively along the axial direction of oscillator pipe 17 Slot, medial launder and second sliding slot.The length direction of first sliding groove and second sliding slot is parallel to the central axis of oscillator pipe 17.

Four groups of slots are respectively corresponded with four thrust units.Thrust unit is made of 2n+1 the first permanent magnets 19.2n+ 1 the first permanent magnet 19 is fixed respectively with 2n+1 dish-shaped gas bag unit edge on extension airbag 20.It is located in the middle One permanent magnet 19 passes through the medial launder of respective grooves group.It is located in the middle n the first permanent magnets 19 of 19 side of the first permanent magnet It is arranged in first sliding groove.N the first permanent magnets 19 for being located in the middle 19 other side of the first permanent magnet are arranged in second sliding slot It is interior.When extension airbag 20 is filled with gas, extension airbag 20 extends, and it is constant to be located in the middle 19 position of the first permanent magnet, remaining First permanent magnet 19 moves, and the spacing of adjacent first permanent magnet 19 increases.

The medial surface of two oscillator end caps 1 and the both ends of oscillator pipe 17 are fixed respectively.Two oscillator end caps 1 and inner shell 3 inner cavity constitutes sliding pair.One end of two oscillation springs 16 and the medial surfaces of two housing end plugs 4 are fixed respectively, the other end It is fixed respectively with the lateral surface of two oscillator end caps 1.When floating afloat package casing 1 with seawater movement, will drive Oscillator system continual reciprocation in inner shell 3.

As shown in Figures 2 and 4, circumferentially uniformly distributed four along 3 central axis of inner shell are offered on the side wall of inner shell 3 A relief hole, the sliding block 7 for the oscillation power generation mechanism that is loaded.Oscillation power generation mechanism shares four.Four oscillation power generation mechanisms with Four thrust units respectively correspond.Oscillation power generation mechanism includes the second permanent magnet 6, sliding block 7, buffer spring 8, lever 9, hinge branch Seat 10 and piezo-electric generating unit 11.Sliding block 7 constitutes the sliding pair radially slided along oscillator pipe 17 with corresponding relief hole.Sliding block 7 Medial surface be fixed with the second permanent magnet 6.Magnetic pole and first permanent magnet 19 direction of second permanent magnet 6 towards corresponding thrust unit The pole polarity of corresponding second permanent magnet 6 is identical.

As shown in figure 5, piezo-electric generating unit 11 includes arch drawing plate 12, flexible board 14, rectangle cushion block 15 and piezoelectric patches 13.The arch drawing plate, shape are arch, according to the principle that power is decomposed, have the function of power amplification using bow-shaped structural, Positioned at the two sides up and down of entire piezoelectric unit.The concave side of two pieces of arch drawing plates 12 is oppositely arranged.Two pieces of arch drawing plates 12 Between be provided with three pieces of flexible boards 14.Three pieces of flexible boards 14 are sequentially arranged at intervals setting.Any two pieces adjacent flexible boards 14 it Between be provided with two pieces of rectangle cushion blocks 15.Two pieces of rectangle cushion blocks are located at the both ends of flexible board 14.Rectangle cushion block 15 makes There are stable intervals between adjacent two pieces of flexible boards 14.The two sides of flexible board 14 are provided with piezoelectric patches 13.Arch stretches Plate 12, flexible board 14, rectangle cushion block 15 and piezoelectric patches 13 are by together with being adhesively fixed.One of arch drawing plate 12 with it is interior The lateral surface of portion's shell 3 is fixed.

Rocker bar bearing 10 is fixed on inner shell 3.The middle part of lever 9 and rocker bar bearing 10 are hinged.One end of lever 9 with The lateral surface of sliding block 7 is connected by buffer spring 8, and the other end and that block arch drawing plate 12 far from inner shell 3 are fixed.Thick stick The distance that bar 9 connects position to 10 hinge axes of rocker bar bearing of buffer spring 8 is less than the position that lever 9 connects arch drawing plate 12 Set the distance of 10 hinge axes of rocker bar bearing

When one piece of first permanent magnet 19 slides into the position being aligned with the second permanent magnet 6, second will be pushed by repulsion Permanent magnet 6 slides in and out.So that sliding block 7 pushes lever 9 to rotate by buffer spring 8.Lever 9 by lever principle, by power into Row amplification, and act on piezo-electric generating unit 11.Due to drawing refreshing plate 12 to use bow-shaped structural, has the function of power amplification, will erect Straight power is decomposed into the skew force along both sides extension, so that flexible layer 14 stretches contraction in the horizontal direction；Due on flexible layer Piezoelectric patches is posted, therefore piezoelectric patches experiences stress variation, so that polarization phenomena occur, produces electricl energy.

Pass through the second permanent magnet due to having multiple first permanent magnets in a reciprocal formation of oscillator pipe 17, thus it is of the invention The mode that is arranged successively of this multiple first permanent magnets, can be realized the effect that low frequency turns high frequency, so that oscillator pipe 17 Vibration can more level off to the resonant frequency of total system and to improve Oscillation Amplitude promote generating efficiency.

Inflator pump, exhaust pump and air accumulator are arranged between package casing 1 and inner shell 3.It is set on extension airbag 20 Port there are two setting.The input port of inflator pump and the gas outlet of air accumulator connect, first gas of delivery outlet and extension airbag 20 Mouth passes through hose and connects.The input port of exhaust pump is connect with second port of extension airbag 20 by hose, delivery outlet and storage The air inlet of gas tank connects.By controlling inflator pump, exhaust pump, the aeration quantity of extension airbag is controlled, can be realized to first forever The adjusting of 19 spacing of magnet, and then regulating system frequency.

Energy collection circuit includes rectifier, current sensor, voltage sensor and battery.Every piezoelectric patches corresponding one A rectifier.Two input terminals of rectifier are separately connected with two terminals of corresponding piezoelectric patches.All rectifiers Cathode output end is connected with anode, and cathode output end is connected with battery cathode.Current sensor is being connected on battery just Between pole and the cathode output end of rectifier.Two terminals of voltage sensor and cathode output end, the cathode of rectifier are defeated Outlet is respectively connected with.

The electricity-generating method of the adjustable ocean wave energy generating set of the frequency is specific as follows:

It swims in marine by package casing 1 is horizontal, and is fixed by anchor and rope with seabed.When package casing 1 is with wave When being shaken, oscillator pipe 17 drives each thrust unit continual reciprocation.Multiple first permanent magnets 19 on each thrust unit Successively pass through and pushes corresponding second permanent magnet 6；Second permanent magnet 6 pushes lever 9 to rotate.Lever 9 squeezes piezo-electric generating unit 11, each piezoelectric patches 13 in piezo-electric generating unit 11 tension under the deformation of two pieces of arch drawing plates 12, so that each piezoelectricity Piece 13 exports electric energy.It carries out an aeration quantity every T time to adjust, 1h≤T≤2h.

The method that aeration quantity is adjusted is as follows:

Step 1: the aeration quantity range of extension airbag 20 is arranged, and extension airbag 20 is arrived to the lower limit of aeration quantity range.

Step 2: Mini-size inflation pump 21 starts, extension airbag 20 is inflated, so that extension airbag 20 extends, it is adjacent The spacing of two the first permanent magnets increases.Extension airbag 20 is inflated to the upper limit of aeration quantity range from the lower limit of aeration quantity range Time is set as 3min.In gas replenishment process, current sensor, voltage sensor persistently detect the voltage and electricity of input battery respectively Stream, and to gained voltage and current quadrature, generate generated output change curve.

Step 3: determining the corresponding extension airbag aeration quantity in generated output highest point in generated output change curve.It will The aeration quantity is as target aeration quantity.

Step 4: miniature exhaust pump 22 starts, the gas in extension airbag is extracted out, until the aeration quantity in extension airbag Reach target aeration quantity.