CN112776694B - Multistage inflation system for automobile seat and control method thereof - Google Patents
Multistage inflation system for automobile seat and control method thereof Download PDFInfo
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- CN112776694B CN112776694B CN202110295481.3A CN202110295481A CN112776694B CN 112776694 B CN112776694 B CN 112776694B CN 202110295481 A CN202110295481 A CN 202110295481A CN 112776694 B CN112776694 B CN 112776694B
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- memory alloy
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 50
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 46
- 229910045601 alloy Inorganic materials 0.000 claims description 31
- 239000000956 alloy Substances 0.000 claims description 31
- 229910000734 martensite Inorganic materials 0.000 claims description 19
- 101100074792 Danio rerio lhx1a gene Proteins 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 101100511184 Dictyostelium discoideum limB gene Proteins 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910010977 Ti—Pd Inorganic materials 0.000 description 1
- 229910007610 Zn—Sn Inorganic materials 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000010618 wire wrap Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/90—Details or parts not otherwise provided for
- B60N2/976—Details or parts not otherwise provided for massaging systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
The invention discloses a multistage inflating system of an automobile seat and a control method thereof, wherein the inflating system comprises: an air bag disposed in the car seat; a plurality of air pumps which are respectively communicated with the air bags through air pipes; a base; the execution mechanisms are arranged on the base and are arranged in one-to-one correspondence with the air pumps; the executing mechanism comprises: a fixed pulley fixedly mounted on the base; the driving machine body is fixedly arranged on the base and is arranged at intervals with the fixed pulleys; one end of the rotary valve core is connected to the driving machine body through a flexible hinge, and the other end of the rotary valve core extends to an air inlet of the air pipe; one end of the memory alloy wire is fixedly connected to the base, and the other end of the memory alloy wire winds the driving machine body, bypasses the fixed pulley and is fixedly connected to the rotary valve core; two ends of the memory alloy wire are respectively connected with a power supply; the length of the memory alloy wire is changed by switching on and off the memory alloy wire, so that the rotary valve core can be driven to rotate, and the rotary valve core can close or open the air inlet of the air pipe.
Description
Technical Field
The invention belongs to the technical field of intelligent cabins and intelligent light weight of vehicle bodies, and particularly relates to a multistage inflation system of a vehicle seat and a control method thereof.
Background
With the development of automotive technology, automotive seating has evolved from a simple component to a component that is relatively complex and highly accurate. The gradual extension of the function of car seats has not only been limited to providing a good driving, riding posture. On a high-grade car, designers endow the car seat with the functions of massage and ventilation so as to meet the increasing demands of consumers.
Most of the traditional automobile seats are passive components which need traction of users or are very non-intelligent components which change the sitting position of the users along with manual adjustment of passengers, and the traditional automobile seats do not relate to the intelligent cabin and the intelligent field of automobile bodies. In recent years, a designer realizes the massage function under any condition through an automobile seat massage system composed of an air bag, a switch valve and an air pump, and the man-machine interaction function between the seat and a user is greatly improved. However, most of the switching valves in the traditional automobile seat massage system are electromagnetic valves, the switching functions of the valves are realized through motor driving, the structure is complex, the noise is large in the use process, most of the switching valves are in a single distribution driving mode, and the complexity of the seat structure is greatly increased due to the fact that more electromagnetic valves are distributed on the seat.
Disclosure of Invention
The invention aims to provide a multistage inflating system for an automobile seat, which is provided with an inflating executing mechanism for opening or closing based on a memory alloy wire, has a simple structure, can realize a silent switch, and overcomes the defects of large noise, complex structure and high manufacturing difficulty of an opening and closing valve of the existing seat inflating system.
The second object of the invention is to provide a multistage inflating system of an automobile seat and a control method thereof, which can determine the quantity of opening actuating mechanisms according to the real-time air pressure of an air bag, so as to realize gradient adjustment of inflating quantity; therefore, the method can effectively shorten the inflation time when a large amount of inflation is needed, and avoid the excessive instantaneous pressure of the air bag when a small amount of inflation is needed.
The technical scheme provided by the invention is as follows:
A multi-stage inflation system for a vehicle seat, comprising:
An air bag disposed in the car seat;
a plurality of air pumps which are respectively communicated with the air bags through air pipes;
A base;
the execution mechanisms are arranged on the base and are arranged in one-to-one correspondence with the air pumps;
Wherein, actuating mechanism includes:
a fixed pulley fixedly mounted on the base;
The driving machine body is fixedly arranged on the base and is arranged at intervals with the fixed pulleys, and the driving base body is cylindrical;
one end of the rotary valve core is connected to the driving machine body through a flexible hinge, and the other end of the rotary valve core extends to the air inlet of the air pipe;
One end of the memory alloy wire is fixedly connected to the base, and the other end of the memory alloy wire bypasses the fixed pulley after being wound around the driving machine body and is fixedly connected to the rotary valve core;
Wherein, two ends of the memory alloy wire are respectively connected with a power supply; the length of the memory alloy wire is changed by switching on and switching off the memory alloy wire, so that the rotary valve core can be driven to rotate, and the rotary valve core can close or open the air inlet of the air pipe.
Preferably, the multi-stage inflation system for a car seat further comprises:
a spring mount fixedly mounted on the base;
The springs are arranged in one-to-one correspondence with the rotary valve cores; one end of the spring is connected to the spring support, and the other end of the spring is connected to the other end of the rotary valve core.
Preferably, a supporting block is integrated outside the air inlet of the air pipe;
When the rotary valve core closes the air inlet, the rotary valve core abuts against the supporting block.
Preferably, the base is fixedly provided with an alloy wire fixing seat, and one end of the memory alloy wire is fixedly connected to the alloy wire fixing seat.
Preferably, a plurality of the driving bodies are coaxially arranged, and a plurality of the fixed pulleys are coaxially arranged; and the axis of the driving machine body and the axis of the fixed pulley are respectively perpendicular to the base.
Preferably, the number of the air pump and the actuating mechanism is 3.
A control method of a multi-stage inflation system of an automobile seat, which comprises the following steps:
judging whether to inflate the air bag according to the current pressure of the air bag and target air compression;
Wherein the airbag is inflated when P <0.9 Po;
p represents the current pressure of the air bag, and Po represents the target pressure;
Step two, when judging that the air bag needs to be inflated, determining the inflation time;
and thirdly, judging the quantity of the air pump and the executing mechanism to be started according to the inflation time, and starting the air pump and the executing mechanism.
Preferably, in the third step, the memory alloy wire is electrified to enable the memory alloy wire to shrink under heating, and the actuating mechanism is started;
wherein, the total length of the alloy wire in the martensitic state in the single actuating mechanism is set as:
Theta is more than or equal to 15 degrees;
Wherein, when alpha lim1≤αg is adopted,
In the case of the alpha lim1＞αg, the time of the alpha lim1＞αg,
s1＝Ea/Ema,sm＝Emb/Ema,Z＝σg/σo；
αg＝min{[(-lnz)/f]<z＜1>,αA}；
Wherein, alpha lim1 and alpha lim2 are the angle positions of the microscopic force balance parts of the alloy wires when the power is on, f is the sliding friction coefficient between the alloy wires and the driving machine body, alpha is the differential unit of the alloy wires on the driving machine body, and s 2 is a dimensionless parameter; e a is the elastic modulus of the alloy wire in the austenitic state, E ma is the elastic modulus of the alloy wire in the martensitic state in the first stage, and E mb is the elastic modulus of the alloy wire in the martensitic state in the second stage; sigma g is the stress in the alloy wire when the martensite first stage and the martensite second stage are connected, sigma o is the initial stress in the linear shape memory alloy wire at the upper part of the flexible hinge before power-on, R is the radius of the driving machine body, and < 0-alpha g > is the Boolean operator; epsilon M(σ0) is the strain rate of the memory alloy wire under the action of an initial stress sigma 0, epsilon A(σ1) is the strain rate under the action of a stress sigma 1 in an austenitic state in the wire after being electrified; alpha g is the wire angle before the martensite elastic threshold is exceeded; n is the number of turns of the winding wire on the driving machine body; r r is the distance from the joint of the memory alloy wire and the rotary valve core to the thinnest part of the flexible hinge structure; θ is the rotation angle of the rotary valve core.
Preferably, when the number of the air pump and the actuator is 3, respectively;
if T is less than or equal to 1s, 1 air pump and 1 executing mechanism are started to inflate the air bag;
If 1s < T is less than or equal to 2s, 2 air pumps and 2 executing mechanisms are started to inflate the air bag;
If T is more than 2s, 3 air pumps and 3 executing mechanisms are started to inflate the air bag;
and T is the inflation time, and in the inflation process, the pressure of the air bag is monitored in real time, the inflation time is updated, and the number of the air pumps and the number of the executing mechanisms are switched and started according to the updated inflation time.
Preferably, the inflation of the air bag is stopped when the air bag pressure reaches 0.9 to 1.1 times the target pressure.
The beneficial effects of the invention are as follows:
The multistage inflating system for the automobile seat provided by the invention is provided with the inflating executing mechanism which is opened or closed based on the memory alloy wire, has a simple structure, can realize a silent switch, and overcomes the defects of large noise, complex structure and high manufacturing difficulty of the switching valve of the existing inflating system for the seat.
The control method of the automobile seat multistage inflation system provided by the invention can determine the quantity of the opening execution mechanisms according to the real-time air pressure of the air bag, and realize gradient adjustment of the inflation quantity; therefore, the method can effectively shorten the inflation time when a large amount of inflation is needed, and avoid the excessive instantaneous pressure of the air bag when a small amount of inflation is needed.
Drawings
Fig. 1 is a schematic general structural diagram of an actuator according to the present invention.
Fig. 2 is a front view of an actuator according to the present invention.
Fig. 3 is a flowchart of a control method in an embodiment of the present invention.
Fig. 4 is a simplified schematic of the actuator when 1 actuator is actuated in the inflation system.
Fig. 5 is a simplified schematic of the actuator when 2 actuators are actuated in the inflation system.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
The invention provides a multistage inflation system of an automobile seat, which comprises the following components: the device comprises an air bag, a plurality of air pumps and a plurality of actuating mechanisms.
The air bag is arranged in the automobile seat, and the profile of the seat is changed through filling or exhausting air; the air pumps are respectively communicated with the air bags through air pipes; the plurality of actuating mechanisms are arranged in one-to-one correspondence with the plurality of air pumps, and the plurality of actuating mechanisms can switch on or off external air flow entering the air pipes by opening or closing the air inlets of the air pipes (communicated with the air pumps).
As shown in fig. 1-2, the plurality of actuators are mounted on a base 100. The actuator comprises:
A fixed pulley 110 fixedly mounted on the base 100 through a fixed pulley mounting bracket 111; a driving body 120 fixedly installed on the base 100, the driving body 120 having a cylindrical shape and being spaced apart from the fixed pulley 110; a rotary valve core 130, one end of which is connected to the outer circumference of the driving body 120 through a flexible hinge 150, and the other end of which extends to the air inlet of the corresponding air pipe 210; the memory alloy wire 140, one end of which is fixedly connected to the base 100, and the other end of which is spirally wound around the driving body 120, bypasses the fixed pulley 110, and is fixedly connected to the rotary valve core 130.
In this embodiment, an alloy wire fixing seat 101 is fixedly disposed on the base 100, and one end of the memory alloy wire 140 is fixedly connected to the alloy wire fixing seat 101.
Wherein, two ends of the memory alloy wire 140 are respectively connected with a power supply and a switch (not shown in the figure); by powering on and off the memory alloy wire, the length of the memory alloy wire 140 is changed, so that the rotary valve core 140 can be driven to rotate, and the rotary valve core 130 can close (block) or open (leave) the air inlet of the air pipe 210.
The material 140 of the memory alloy wire is preferably a nickel titanium based shape memory material, but of course also comprises other materials whose shape can be changed by temperature control, such as Au-Cd, cu-Zn-A1, cu-Zn-Sn, ni-Ti-Pd, etc.
The flexible hinge adopts a straight round single-shaft flexible hinge structural design, and the stress rotation angle is as follows:
Wherein θ is a stress rotation angle (corresponding to a rotation angle of the rotary valve core 130) of the flexible hinge, M is a moment applied to the flexible hinge structure, H is a radius of an arc portion of the straight circular single-axis flexible hinge, E is an elastic modulus of a material used for the flexible hinge, T is a width of the flexible hinge, T is a thickness of a thinnest portion of the flexible hinge, and μ is an angle differentiating unit of the arc portion of the straight circular single-axis flexible hinge under a polar coordinate system.
The multistage inflation system of car seat, still include: a spring supporter 102 fixedly installed on the base 100; and a plurality of springs 160 disposed in one-to-one correspondence with the rotary valve cores 130; one end of the spring 160 is connected to the spring support 102, and the other end is connected to the other end of the rotary spool 130. Wherein, the support block 211 is integrated at the outer side of the air inlet of the air pipe 210; when the rotary valve core 130 closes the air inlet of the air duct 210, the lower side surface of the rotary valve core 130 abuts against the support block 211. The rotary valve body 130 can be pressed against the support block 211 by the provision of the spring 160, and the sealing performance can be improved. Meanwhile, after the inflation process is finished, the memory alloy wire 140 is powered off and grows, and the rotary valve core 130 can quickly return to the air inlet of the air pipe 210 under the action of the restoring force of the spring 160, so that the air inlet is closed.
In this embodiment, to reduce the space occupied by the actuator, the plurality of driving bodies 120 are coaxially arranged, and the plurality of fixed pulleys 110 are coaxially arranged; and the axis of the driving body 120 and the axis of the fixed pulley 110 are perpendicular to the base 100, respectively. The plurality of rotary spools 140 are arrayed in a direction perpendicular to the base 100, respectively.
In this embodiment, the number of the air pump and the number of the actuating mechanisms are 3.
In another embodiment, the multi-stage inflation system for a vehicle seat further comprises: the instruction sensing module is used for acquiring an inflation instruction of a seat user and current pressure information of the airbag and outputting the acquired information; the inflation time calculation module is used for receiving the state information, classifying and judging to obtain inflation time, and when the inflation system starts to be connected into work, considering the time when the current pressure of the air bag reaches the target pressure when a single inflation execution unit is connected into the air bag according to the difference value between the current pressure of the air bag and the target pressure, so as to obtain initial inflation time. Then judging the number of the air-charging execution units which need to be connected into the system according to the grade judging unit, and dynamically adjusting the number of the air-charging execution units connected into the air-charging passage according to the time obtained by recalculation when the air-charging time calculation module continuously considers the time of reaching the target pressure when the single execution unit is connected into the air-charging process along with the increase of the air bag pressure; the grade judging unit is used for judging the grade of the inflation time and dynamically adjusting the quantity of the inflation executing mechanism and the air pump of the access system.
A deflation system is also included for deflating the air bag.
The invention also provides a control method of the automobile seat multi-stage inflation system, which comprises the following steps:
judging whether to inflate the air bag according to the current pressure of the air bag and target air compression;
Wherein the airbag is inflated when P <0.9 Po;
p represents the current pressure of the air bag, and Po represents the target pressure;
Step two, when judging that the air bag needs to be inflated, determining the inflation time;
and thirdly, judging the quantity of the opened air pump and the executing mechanism according to the air charging time.
In the third step, the memory alloy wire is electrified to enable the memory alloy wire to be heated and contracted, and the executing mechanism is started;
Wherein, the length of the memory alloy wire shrinkage actuation is as follows: l=l 1+L2;
In the case of the alpha lim1≤αg, the time of the alpha lim1≤αg,
In the case of the alpha lim1＞αg, the time of the alpha lim1＞αg,
s1＝Ea/Ema,sm＝Emb/Ema,Z＝σg/σo；
L2＝Lfree[εM(σ0)-εA(σ1)]；
αg＝min{[(-lnz)/f]<z＜1>,αA}；
Wherein, alpha lim1 and alpha lim2 are the angle positions of the microscopic force balance parts of the alloy wires when the power is on, f is the sliding friction coefficient between the alloy wires and the driving machine body, alpha is the differential unit of the alloy wires on the driving machine body, and s 2 is a dimensionless parameter; E a is the elastic modulus of the alloy wire in the austenitic state, E ma is the elastic modulus of the alloy wire in the martensitic state in the first stage, and E mb is the elastic modulus of the alloy wire in the martensitic state in the second stage; Sigma g is the stress in the alloy wire when the martensite first stage and the martensite second stage are connected, sigma o is the initial stress in the linear shape memory alloy wire at the upper part of the flexible hinge before power-on, R is the radius of the driving machine body, and < 0-alpha g > is the Boolean operator; the alloy wire in the single actuator is divided into a wound wire wound on a cylinder and a straight wire except for a wound wire portion, L free is a straight wire length in a martensitic state, epsilon M(σ0) is a strain rate of the memory alloy wire under the action of an initial stress sigma 0, Epsilon A(σ1) is the strain rate under the effect of stress sigma 1 in the austenitic state in the wire after energization. Alpha g is defined as the wire angle before the martensite elastic threshold is exceeded, alpha g is less than the total wire wrap angle alpha A of the wire around the drive body; n is the number of turns of wire wound on the drive body, defining n=2 or n=3; r r is the distance from the joint of the memory alloy wire and the rotary valve core to the thinnest part of the flexible hinge structure; θ is the rotation angle of the rotary valve core, and is defined to be more than 15 degrees, and a single inflation executing mechanism is opened; l t is the total length of the alloy wire in the martensitic state (at room temperature) in the single actuator. When the value of theta is determined according to the actual situation, the value of theta can be brought into a formula, and the value of L t is determined, namely the length of the selected memory alloy wire is determined, so that the executing mechanism can be normally opened.
As a further preferred aspect, the inflation of the air bag is stopped when the air bag pressure reaches 0.9 to 1.1 times the target pressure.
The control method provided by the invention is further described below with reference to specific examples.
Examples
In this embodiment, as shown in fig. 3-5, the number of the air pump and the actuator is 3. The specific control method comprises the following steps:
comparing the current air pressure P with the target pressure Po, judging whether the current air bag pressure P is between 0.9 and 1.1 times of the target pressure Po, if so, not opening the air pump and the actuating mechanism, and if not, opening the air pump and the actuating mechanism.
A. if the current air bag pressure P is less than 0.9Po, the air charging working condition classifying unit in the air charging time calculating module classifies the current air bag pressure, and the time T for the air charging to reach the target air bag pressure is calculated through the air charging working condition time calculating unit.
If T is less than or equal to 1s, on the basis of considering the system delay, 1 inflation executing mechanism and 1 air pump are connected; when 1 inflation actuator is turned on, the actuator is simplified to the mechanism shown in FIG. 4; after the current pressure P of the air bag is updated, the current pressure P of the air bag is transmitted to an air bag current pressure P building unit, circulation is realized until the current pressure P of the air bag reaches 0.9-1.1 times of the target pressure Po, and the air pump and the executing mechanism are closed;
If 1s < T is less than or equal to 2s, 2 air inflation executing mechanisms and 2 air pumps are connected on the basis of considering system delay, so that the air inflation speed is increased; when 2 inflation actuators are turned on, the actuators are simplified to those shown in FIG. 5; after the current pressure P of the air bag is updated, judging whether T of the next cycle is between 1s < T <2s, if so, continuing to work the 2 inflation executing mechanisms, if not, switching on the 1 inflation executing mechanisms to work, realizing the cycle until the current pressure P of the air bag reaches between 0.9 and 1.1 times of the target pressure Po, and closing the air pump and the novel shape memory alloy valve;
If T is more than 2s, on the basis of considering the system delay, 3 air charging executing mechanisms and 3 air pumps are connected, the air charging speed is further increased, after the current pressure P of the air bag is updated, whether T of the next cycle is between T and more than 2s is judged, if the current pressure P of the air bag is between T and more than 2s, the 3 air charging executing mechanisms continue to work, and if the current pressure P of the air bag is not between T, the section of the current cycle is judged. If T is less than or equal to 1s, 1 inflation execution working unit is connected, the current pressure P of the air bag is updated and then is transmitted to the current pressure P building unit of the air bag, circulation is realized until the current pressure P of the air bag reaches 0.9-1.1 times of the target pressure Po, the air pump and the novel shape memory alloy valve are closed, and the system is withdrawn from working; if 1s < T is less than or equal to 2s, 2 inflation executing mechanisms are connected, after the current pressure P of the air bag is updated, whether T of the next cycle is between 1s < T <2s or not is judged, if the current pressure P of the air bag is not equal to 2s, the secondary inflation executing mechanism continues to work, if the current pressure P of the air bag is not equal to 2s, 1 inflation executing mechanism is connected to work, circulation is achieved until the current pressure P of the air bag reaches 0.9-1.1 times of the target pressure Po, and the air pump and the novel shape memory alloy valve are closed.
B. If the current air bag pressure P is more than 1.1Po, the air discharging system works, on the basis of considering the system delay, the air discharging executing mechanism is connected, and when the air bag pressure is updated to be between 0.9 and 1.1 times of the target pressure Po, the air discharging system stops working.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. A control method of a multistage inflation system for a vehicle seat, characterized in that the multistage inflation system for a vehicle seat is used comprising:
An air bag disposed in the car seat;
a plurality of air pumps which are respectively communicated with the air bags through air pipes;
A base;
the execution mechanisms are arranged on the base and are arranged in one-to-one correspondence with the air pumps;
Wherein, actuating mechanism includes:
a fixed pulley fixedly mounted on the base;
The driving machine body is fixedly arranged on the base and is arranged at intervals with the fixed pulleys, and the driving base body is cylindrical;
one end of the rotary valve core is connected to the driving machine body through a flexible hinge, and the other end of the rotary valve core extends to the air inlet of the air pipe;
One end of the memory alloy wire is fixedly connected to the base, and the other end of the memory alloy wire bypasses the fixed pulley after being wound around the driving machine body and is fixedly connected to the rotary valve core;
wherein, two ends of the memory alloy wire are respectively connected with a power supply; the length of the memory alloy wire is changed by switching on and switching off the memory alloy wire, so that the rotary valve core can be driven to rotate, and the rotary valve core can close or open the air inlet of the air pipe;
the control method comprises the following steps:
judging whether to inflate the air bag according to the current pressure of the air bag and target air compression;
Wherein the airbag is inflated when P <0.9 Po;
p represents the current pressure of the air bag, and Po represents the target pressure;
Step two, when judging that the air bag needs to be inflated, determining the inflation time;
judging the quantity of the air pump and the executing mechanism to be started according to the inflation time, and starting the air pump and the executing mechanism;
in the third step, the memory alloy wire is electrified to enable the memory alloy wire to be heated and contracted, and the executing mechanism is started;
wherein, the total length of the alloy wire in the martensitic state in the single actuating mechanism is set as:
Wherein, when alpha lim1≤αg is adopted,
In the case of the alpha lim1＞αg, the time of the alpha lim1＞αg,
s1＝Ea/Ema,sm＝Emb/Ema,Z＝σg/σo；
αg＝min{[(-lnz)/f]<z＜1>,αA}；
Wherein, alpha lim1 and alpha lim2 are the angle positions of the microscopic force balance parts of the alloy wires when the power is on, f is the sliding friction coefficient between the alloy wires and the driving machine body, alpha is the differential unit of the alloy wires on the driving machine body, and s 2 is a dimensionless parameter; e a is the elastic modulus of the alloy wire in the austenitic state, E ma is the elastic modulus of the alloy wire in the martensitic state in the first stage, and E mb is the elastic modulus of the alloy wire in the martensitic state in the second stage; sigma g is the stress in the alloy wire when the martensite first stage and the martensite second stage are connected, sigma o is the initial stress in the linear shape memory alloy wire at the upper part of the flexible hinge before power-on, R is the radius of the driving machine body, and < 0-alpha g > is the Boolean operator; epsilon M(σ0) is the strain rate of the memory alloy wire under the action of an initial stress sigma 0, epsilon A(σ1) is the strain rate under the action of a stress sigma 1 in an austenitic state in the wire after being electrified; alpha g is the wire angle before the martensite elastic threshold is exceeded; n is the number of turns of the winding wire on the driving machine body; r r is the distance from the joint of the memory alloy wire and the rotary valve core to the thinnest part of the flexible hinge structure; θ is the rotation angle of the rotary valve core.
2. The method of controlling a multi-stage inflation system for a vehicle seat according to claim 1, characterized in that the multi-stage inflation system for a vehicle seat further comprises:
a spring mount fixedly mounted on the base;
The springs are arranged in one-to-one correspondence with the rotary valve cores; one end of the spring is connected to the spring support, and the other end of the spring is connected to the other end of the rotary valve core.
3. The control method of the multistage inflating system for the automobile seat according to claim 2, wherein a support block is integrated on the outer side of the air inlet of the air pipe;
When the rotary valve core closes the air inlet, the rotary valve core abuts against the supporting block.
4. The control method of the multistage inflating system for the automobile seat according to claim 3, wherein an alloy wire fixing seat is fixedly arranged on the base, and one end of the memory alloy wire is fixedly connected to the alloy wire fixing seat.
5. The control method of the multistage inflating system for an automobile seat according to claim 3 or 4, wherein a plurality of the drive bodies are coaxially arranged, and a plurality of the fixed pulleys are coaxially arranged; and the axis of the driving machine body and the axis of the fixed pulley are respectively perpendicular to the base.
6. The control method of the multistage inflating system for an automobile seat according to claim 5, wherein the number of the air pump and the number of the actuators are 3, respectively.
7. The control method of the multistage inflating system for an automobile seat according to claim 6, wherein when the number of the air pump and the actuator is 3, respectively;
if T is less than or equal to 1s, 1 air pump and 1 executing mechanism are started to inflate the air bag;
If 1s < T is less than or equal to 2s, 2 air pumps and 2 executing mechanisms are started to inflate the air bag;
If T is more than 2s, 3 air pumps and 3 executing mechanisms are started to inflate the air bag;
and T is the inflation time, and in the inflation process, the pressure of the air bag is monitored in real time, the inflation time is updated, and the number of the air pumps and the number of the executing mechanisms are switched and started according to the updated inflation time.
8. The control method of the multistage inflating system for an automobile seat according to claim 7, wherein the inflation of the air bag is stopped when the air bag pressure reaches 0.9 to 1.1 times the target pressure.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107438535A (en) * | 2015-03-12 | 2017-12-05 | 布罗泽汽车部件制造科堡有限公司 | Massage machine for seat |
| CN207089062U (en) * | 2017-06-15 | 2018-03-13 | 宁波拓普集团股份有限公司 | Automotive seat pneumatic type waist support air flow controller |
| CN214523491U (en) * | 2021-03-19 | 2021-10-29 | 吉林大学 | Multistage inflation system for automobile seat |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318120B (en) * | 2013-07-02 | 2015-08-12 | 浙江大学 | The automobile intelligent safety air bag of Shape-based interpolation memory alloy spring and method thereof |
| CN105774603B (en) * | 2016-05-26 | 2018-10-12 | 吉林大学 | A kind of safety chair seats of car and method with position automatic regulation function |
| EP3281821B1 (en) * | 2016-08-08 | 2019-04-17 | Kongsberg Automotive Sp. z o.o. | Sma valve assembly for controlling pressurized air supply to air cells in a vehicle seat |
| CN107218404B (en) * | 2017-05-16 | 2019-03-08 | 凯迈（洛阳）气源有限公司 | Pile-up valve and the gas cylinder for using the pile-up valve |
| CN211573734U (en) * | 2019-11-11 | 2020-09-25 | 艾福迈汽车***(上海)有限公司 | Control valve air pump integrated with shape memory alloy |
| CN112046372A (en) * | 2020-09-24 | 2020-12-08 | 东莞市安海思精密电子有限公司 | Pump and valve integrated pneumatic control module, massage system and automobile seat |
-
2021
- 2021-03-19 CN CN202110295481.3A patent/CN112776694B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107438535A (en) * | 2015-03-12 | 2017-12-05 | 布罗泽汽车部件制造科堡有限公司 | Massage machine for seat |
| CN207089062U (en) * | 2017-06-15 | 2018-03-13 | 宁波拓普集团股份有限公司 | Automotive seat pneumatic type waist support air flow controller |
| CN214523491U (en) * | 2021-03-19 | 2021-10-29 | 吉林大学 | Multistage inflation system for automobile seat |
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