阅读说明：本技术 一种汽车碰撞变气压式气囊安全系统 (Variable-air-pressure type air bag safety system for automobile collision ) 是由 王燕清 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种汽车碰撞变气压式气囊安全系统,包括安全气囊、气囊充气单元、控制单元和碰撞监测单元,气囊充气单元包括充气管、充气泵和电磁控制阀,充气管一端与安全气囊的进气端连接,充气管的另一端与充气泵的出气端连接,电磁控制阀安装于充气管,电磁控制阀、充气泵和碰撞监测单元分别连接控制单元,本发明工作原理简单,智能化程度高,能够根据碰撞的冲力进行气囊充气量的控制,避免人员的伤害。(The invention discloses a variable-air-pressure type air bag safety system for automobile collision, which comprises an air bag, an air bag inflation unit, a control unit and a collision monitoring unit, wherein the air bag inflation unit comprises an inflation tube, an inflation pump and an electromagnetic control valve, one end of the inflation tube is connected with the air inlet end of the air bag, the other end of the inflation tube is connected with the air outlet end of the inflation pump, the electromagnetic control valve is arranged on the inflation tube, and the electromagnetic control valve, the inflation pump and the collision monitoring unit are respectively connected with the control unit.)

1. The utility model provides a car collision becomes atmospheric pressure formula gasbag safety system which characterized in that: including air bag (1), gasbag inflation unit, control unit (2) and collision monitoring unit, the gasbag inflation unit includes gas tube (3), pump (4) and solenoid electric valve (5), gas tube (3) one end is connected with the inlet end of air bag (1), the other end of gas tube (3) is connected with the end of giving vent to anger of pump (4), solenoid electric valve (5) are installed in gas tube (3), solenoid electric valve (5), pump (4) and collision monitoring unit connect control unit (2) respectively.

2. The variable air pressure type air bag safety system for automobile collision according to claim 1, wherein: the collision monitoring unit comprises a plurality of groups of collision pressure sensors (6) and a sensing signal acquisition unit (7), wherein the input end of the sensing signal acquisition unit (6) is connected with the plurality of groups of collision pressure sensors (6), and the output end of the sensing signal acquisition unit (7) is connected with the control unit (2).

3. The variable air pressure type air bag safety system for automobile collision according to claim 2, characterized in that: sensing signal acquisition unit (7) include first operational amplifier (8) and second operational amplifier (9), first operational amplifier (8) positive pole input is connecting resistance A (1a) one end and resistance B (2a) one end respectively, first operational amplifier (8) negative pole input passes through electric capacity A (1B) ground connection, the resistance A (1a) other end is connected with the sensing signal receiving terminal, first operational amplifier (8) output is connecting resistance B (2a) the other end respectively and is connected with second operational amplifier (9) positive pole input, second operational amplifier (9) negative pole input passes through electric capacity B (2B) ground connection, second operational amplifier (9) output passes through electric capacity C (3B) and connects the sensing signal output.

4. The variable air pressure type air bag safety system for automobile collision according to claim 3, wherein: the models of the first operational amplifier (8) and the second operational amplifier (9) are MC 1590.

5. The variable air pressure type air bag safety system for automobile collision according to claim 1, wherein: the intelligent alarm system is characterized by further comprising a signal transmission unit (10), wherein the control unit (2) is connected with an alarm terminal (11) through the signal transmission unit (10).

6. The variable air pressure type air bag safety system for automobile collision according to claim 1, wherein: the control unit (2) adopts a single chip microcomputer with the model number of AT89C 51.

7. The use method for realizing the variable-pressure air bag safety system for the automobile collision according to claim 1 is characterized in that: the using method comprises the following steps:

A. when the automobile collides in the driving process, a plurality of collision pressure sensors acquire collision force signals;

B. the acquired impact force signal is acquired by the sensing signal acquisition unit, amplified by the first operational amplifier and the second operational amplifier and transmitted to the control unit;

C. the control unit compares the acquired impact force with a preset impact force, and triggers the electromagnetic control valve to control the opening and closing degree, so as to adjust the air inflation amount;

D. meanwhile, the control unit transmits the acquired impact force and the airbag inflation signal to the alarm terminal in real time to give an alarm.

8. The use method of the variable-pressure air bag safety system for the automobile collision according to claim 7, characterized in that: in the step C, if the collected impact force is 0-40% of the preset value, the electromagnetic valve is controlled to work, the air bag is closed when being inflated to 1/3 full, if the collected impact force is 40% -60% of the preset impact force, the electromagnetic control valve is controlled to work, when the air bag is half inflated, the electromagnetic control valve is closed, and if the collected impact force is more than 60% of the preset impact force, the electromagnetic control valve is controlled to work, and the air bag is fully inflated.

Technical Field

The invention relates to the technical field of adjusting systems, in particular to a variable-air-pressure type air bag safety system for automobile collision.

Background

An electronic control of safety air bag (airbag) system is a passive safety (see car safety) protection system, which is used in conjunction with a seat belt to provide effective crash protection for the occupants. When the automobile collides, the automobile safety air bag can reduce the head injury rate by 25 percent and the face injury rate by about 80 percent.

All install air bag on the car at present, in case the car takes place the collision accident, the gasbag can pop out immediately, but current gasbag can't control the inflation volume size, and the gasbag inflation volume is too big leads to the fact the bodily injury easily, consequently, needs to improve.

Disclosure of Invention

The invention aims to provide a variable-pressure air bag safety system for automobile collision, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a car collision becomes atmospheric pressure formula gasbag safety coefficient, includes air bag, gasbag inflation unit, the control unit and collision monitoring unit, gasbag inflation unit includes gas tube, pump and solenoid electric valve, gas tube one end is connected with air bag's inlet end, the other end of gas tube is connected with the end of giving vent to anger of pump, solenoid electric valve installs in the gas tube, solenoid electric valve, pump and collision monitoring unit connect control unit respectively.

Preferably, the application provides a car collision becomes atmospheric pressure formula gasbag safety coefficient, wherein, collision monitoring unit includes multiunit collision pressure sensor, sensing signal acquisition unit, the sensing signal acquisition unit input is connected with multiunit collision pressure sensor, the sensing signal acquisition unit output is connected with the control unit.

Preferably, the application provides a pair of car collision becomes atmospheric pressure formula gasbag safety coefficient, wherein, sensing signal acquisition unit includes first operational amplifier and second operational amplifier, the anodal input of first operational amplifier is connecting resistance 1a one end and resistance 2a one end respectively, electric capacity 1b ground connection is passed through to first operational amplifier negative pole input, the resistance 1a other end is connected with the sensing signal receiving terminal, the first operational amplifier output is connecting resistance 2a other end and the anodal input of second operational amplifier are connected respectively, electric capacity 2b ground connection is passed through to second operational amplifier negative pole input, the second operational amplifier output connects sensing signal output end through electric capacity 3 b.

Preferably, the application provides a variable-pressure airbag safety system for automobile collision, wherein the first operational amplifier and the second operational amplifier are of MC1590 type.

Preferably, the variable-pressure airbag safety system for automobile collision provided by the application further comprises a signal transmission unit, and the control unit is connected with the alarm terminal through the signal transmission unit.

Preferably, the application provides a variable-pressure air bag safety system for automobile collision, wherein the control unit adopts a single chip microcomputer with the model number of AT89C 51.

Preferably, the application provides a variable-pressure airbag safety system for automobile collision, wherein the application method comprises the following steps:

A. when the automobile collides in the driving process, a plurality of collision pressure sensors acquire collision force signals;

B. the acquired impact force signal is acquired by the sensing signal acquisition unit, amplified by the first operational amplifier and the second operational amplifier and transmitted to the control unit;

C. the control unit compares the acquired impact force with a preset impact force, and triggers the electromagnetic control valve to control the opening and closing degree, so as to adjust the air inflation amount;

D. meanwhile, the control unit transmits the acquired impact force and the airbag inflation signal to the alarm terminal in real time to give an alarm.

Preferably, in the step C, if the collected impact force is 0 to 40% of the preset value, the electromagnetic valve is controlled to operate, the airbag is closed when being inflated to 1/3 full, if the collected impact force is 40 to 60% of the preset impact force, the electromagnetic control valve is controlled to operate, when the airbag is half inflated, the electromagnetic control valve is closed, and if the collected impact force is more than 60% of the preset impact force, the electromagnetic control valve is controlled to operate, and the airbag is fully inflated.

Compared with the prior art, the invention has the beneficial effects that: the invention has simple working principle and high intelligent degree, can control the air inflation quantity of the air bag according to the impact force of collision, and avoids the injury of personnel; the adopted sensing signal acquisition unit adopts two operational amplifiers, so that the sensing signal can be accurately amplified, the distortion degree is low, and the inflation control precision is further improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a sensor signal acquisition unit of the present invention;

FIG. 3 is a control flow chart of the present invention;

in the figure: the device comprises an air bag 1, a control unit 2, an inflation tube 3, an inflator 4, an electromagnetic control valve 5, a collision pressure sensor 6, a sensing signal acquisition unit 7, a first operational amplifier 8, a second operational amplifier 9, a signal transmission unit 10 and an alarm terminal 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides a technical solution: a variable-air-pressure air bag safety system for automobile collision comprises an air bag 1, an air bag inflation unit, a control unit 2 and a collision monitoring unit, wherein the air bag inflation unit comprises an inflation tube 3, an inflation pump 4 and an electromagnetic control valve 5, one end of the inflation tube 3 is connected with an air inlet end of the air bag 1, the other end of the inflation tube 3 is connected with an air outlet end of the inflation pump 4, the electromagnetic control valve 5 is installed on the inflation tube 3, the electromagnetic control valve 5, the inflation pump 4 and the collision monitoring unit are respectively connected with the control unit 2, the variable-air-pressure air bag safety system further comprises a signal transmission unit 10, the control unit 2 is connected with an alarm terminal 11 through the signal transmission unit 10, and the control unit 2 adopts an AT89C51 single chip microcomputer.

In the invention, the collision monitoring unit comprises a plurality of groups of collision pressure sensors 6 and a sensing signal acquisition unit 7, wherein the input end of the sensing signal acquisition unit 6 is connected with the plurality of groups of collision pressure sensors 6, and the output end of the sensing signal acquisition unit 7 is connected with the control unit 2.

Wherein, sensing signal acquisition unit 7 includes first operational amplifier 8 and second operational amplifier 9, 8 positive inputs of first operational amplifier connect resistance A1a one end and resistance B2a one end respectively, 8 negative inputs of first operational amplifier pass through electric capacity A1B ground connection, the resistance A1a other end is connected with the sensing signal receiving terminal, 8 output of first operational amplifier connect respectively the resistance B2a other end and the positive inputs of second operational amplifier 9 and connect, 9 negative inputs of second operational amplifier pass through electric capacity B2B ground connection, 9 output of second operational amplifier connects the sensing signal output end through electric capacity C3B, and first operational amplifier 8 and the 9 models of second operational amplifier all adopt MC 1590.

The working principle is as follows: the using method of the invention comprises the following steps:

A. when the automobile collides in the driving process, a plurality of collision pressure sensors acquire collision force signals;

B. the acquired impact force signal is acquired by the sensing signal acquisition unit, amplified by the first operational amplifier and the second operational amplifier and transmitted to the control unit;

C. the control unit compares the acquired impact force with a preset impact force, and triggers the electromagnetic control valve to control the opening and closing degree, so as to adjust the air inflation amount;

D. meanwhile, the control unit transmits the acquired impact force and the airbag inflation signal to the alarm terminal in real time to give an alarm.

In the step C, if the collected impact force is 0-40% of the preset value, the electromagnetic valve is controlled to work, the air bag is closed when being inflated to 1/3 full, if the collected impact force is 40% -60% of the preset impact force, the electromagnetic control valve is controlled to work, when the air bag is half inflated, the electromagnetic control valve is closed, and if the collected impact force is more than 60% of the preset impact force, the electromagnetic control valve is controlled to work, and the air bag is fully inflated.

In conclusion, the invention has simple working principle and high intelligent degree, can control the air inflation quantity of the air bag according to the impact force of collision, and avoids the injury of personnel; the adopted sensing signal acquisition unit adopts two operational amplifiers, so that the sensing signal can be accurately amplified, the distortion degree is low, and the inflation control precision is further improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.