CN111332240B - Sensor triggering system of automobile safety air bag - Google Patents
Sensor triggering system of automobile safety air bag Download PDFInfo
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- CN111332240B CN111332240B CN202010213334.2A CN202010213334A CN111332240B CN 111332240 B CN111332240 B CN 111332240B CN 202010213334 A CN202010213334 A CN 202010213334A CN 111332240 B CN111332240 B CN 111332240B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R2021/01013—Means for detecting collision, impending collision or roll-over
- B60R2021/01027—Safing sensors
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Abstract
The invention discloses a sensor trigger system of an automobile safety airbag, which comprises a sensor base horizontally arranged on an automobile, wherein a front collision mercury switch sensor, a rear collision mercury switch sensor, a left collision mercury switch sensor and a right collision mercury switch sensor are arranged on the sensor base; the front collision mercury switch sensor, the rear collision mercury switch sensor, the left collision mercury switch sensor and the right collision mercury switch sensor are distributed in a circumferential array by taking the axis of the sensor base as the center; the four-direction independent sensor is simple in structure, and the structural characteristics of the sensors ensure that the safety airbag cannot be triggered in the normal braking and deceleration process of the automobile under the special non-violent collision scenes such as lifting, side turning (slow side turning caused by non-collision), dragging and the like when the automobile is collided with low strength and jolts up and down violently, so that the reliability of the safety airbag is ensured.
Description
Technical Field
The invention belongs to the field of automobile safety.
Background
On a high-grade automobile, the safety airbags which are triggered by front and rear side collisions and left and right side violent collisions of a vehicle body are different, for example, the front part is collided to start the airbags near a steering wheel, and the side part is collided to start the airbags near a vehicle window, so that the system needs to separately judge the four-direction collision;
the mercury switch type collision sensor is made of the characteristic that mercury conducts electricity well, and when an automobile collides, the deceleration enables the mercury to generate inertia force; the component force of the inertia force in the mercury movement direction throws mercury to the sensor electrodes to enable the two electrodes to be connected, so that a power supply of an airbag igniter circuit is connected;
however, mercury has fluidity, for example, in a bumpy road section with high strength, mercury may vibrate and splash to the trigger electrode when the mercury bumps up and down, and further, the safety airbag is triggered by mistake to cause accidents; or in the special scenes of non-violent collision, such as the condition that the automobile needs to be hoisted, turned on one side (slow turning caused by non-collision), dragged and the like, mercury can flow to the electrodes to trigger the safety air bag after the posture of the automobile is changed, so that the phenomenon of mistaken triggering of the safety air bag is caused; since the triggering of an airbag for a motor vehicle is disposable, the complete safety system must be replaced again if it is triggered once, and the replacement cost of the safety system is high, it is necessary to design a sensor that can trigger the airbag only in case of a normal collision.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a sensor triggering system of an automobile safety air bag.
The technical scheme is as follows: in order to achieve the purpose, the sensor triggering system of the automobile safety airbag comprises a sensor base horizontally arranged on an automobile, wherein a front collision mercury switch sensor, a rear collision mercury switch sensor, a left collision mercury switch sensor and a right collision mercury switch sensor are arranged on the sensor base; the front collision mercury switch sensor, the rear collision mercury switch sensor, the left collision mercury switch sensor and the right collision mercury switch sensor are distributed in a circumferential array by taking the axis of the sensor base as the center;
when the front side, the rear side, the left side and the right side of the vehicle body are respectively collided violently, the front collision mercury switch sensor, the rear collision mercury switch sensor, the left collision mercury switch sensor and the right collision mercury switch sensor can be correspondingly triggered.
Further, the front collision mercury switch sensor, the rear collision mercury switch sensor, the left collision mercury switch sensor and the right collision mercury switch sensor are all the same in structure, and the front collision mercury switch sensor, the rear collision mercury switch sensor, the left collision mercury switch sensor and the right collision mercury switch sensor are arranged in four directions in front, back, left and right respectively.
Furthermore, any one of the front collision mercury switch sensor, the rear collision mercury switch sensor, the left collision mercury switch sensor and the right collision mercury switch sensor comprises a mercury inertia climbing pipe which is inclined and rises in a smooth arc shape, a mercury inertia climbing channel is arranged in the mercury inertia climbing pipe, and the lower part in the mercury inertia climbing channel is filled with a mass of liquid mercury.
Furthermore, the lower end of the mercury inertial climbing channel is provided with an annular inertial movable ball limiting inner edge, the inertial movable ball is coaxially and movably arranged in the mercury inertial climbing channel and is in sliding fit with the inner wall of the mercury inertial climbing channel, the inertial movable ball can move along the mercury inertial climbing channel and is positioned between the mass of liquid mercury and the inertial movable ball limiting inner edge, and the mass of liquid mercury always extrudes the inertial movable ball under the action of gravity, so that the inertial movable ball coaxially abuts against the inertial movable ball limiting inner edge.
Furthermore, the inner limiting edge of the inertia movable ball is made of rubber or silica gel, and the inertia movable ball blocks the lower end of the mercury inertia climbing channel.
Furthermore, the upper end of the mercury inertial ascending tube is integrally communicated with a mercury cut-off tube coaxially, a mercury climbing channel is arranged in the mercury cut-off tube, a mercury cut-off valve core is arranged in the mercury climbing channel, and the mercury cut-off valve core can cut off and block the mercury climbing channel; the upper end of the mercury cutting tube is integrally communicated with an electrode tube coaxially through a reducing tube, and a mercury conducting channel is arranged inside the electrode tube; the lower end of the mercury inertial climbing pipe is integrally communicated with a vertical negative pressure vertical pipe through a bent pipe, and a negative pressure cavity is formed inside the negative pressure vertical pipe; the upper end of the mercury conducting channel is communicated with the negative pressure cavity through a return pipe;
the safety airbag device comprises a mercury conducting channel, and is characterized by further comprising an air bag controller, wherein the air bag controller can be triggered when a first electrode and a second electrode which are led out from the air bag controller are electrically communicated, the first electrode and the second electrode are arranged in the mercury conducting channel at intervals, and when mercury liquid flows through the mercury conducting channel, the first electrode is electrically communicated with the second electrode.
The mercury vapor-liquid separation device further comprises a horizontal annular tube, and the inner diameter and the outer diameter of the annular tube are the same as those of the mercury cut-off tube; the annular tube is integrally connected with the mercury cut-off tube, an annular channel in the annular tube is communicated with a mercury climbing channel in the mercury cut-off tube, and the center line of a ring body of the annular tube is intersected with the axis of the mercury cut-off tube;
the mercury cut-off valve core is positioned at the communication position of the annular channel and the mercury climbing channel, the mercury cut-off valve core comprises a left movable cylinder and a right movable cylinder which are bilaterally symmetrical, the outer walls of the left movable cylinder and the right movable cylinder are in sliding fit with the inner wall of the annular pipe, and the left movable cylinder and the right movable cylinder can slide along the annular channel in the annular pipe; when the left movable cylinder body and the right movable cylinder body are in mutual contact at the communication position of the annular channel and the mercury climbing channel, the mercury climbing channel is cut off; when the left movable cylinder body and the right movable cylinder body are separated from each other, the mercury climbing channel is in a smooth state; a left arc-shaped linkage rod and a right arc-shaped linkage rod are symmetrically arranged in the annular channel from left to right, and the circle centers of the arc structures of the left arc-shaped linkage rod and the right arc-shaped linkage rod are coincided with the axis of the annular channel; the arc lengths of the left arc-shaped linkage rod and the right arc-shaped linkage rod are the same, and the central angles of the left arc-shaped linkage rod and the right arc-shaped linkage rod are both 80-100 degrees;
the anticlockwise end of the left arc-shaped linkage rod is fixedly connected with the left end wall of the left movable barrel; a left inertia ball is fixedly connected to the clockwise end of the left arc-shaped linkage rod, the left inertia ball is in sliding fit with the inner wall of the annular channel, a left annular inner edge is further fixedly arranged on the inner wall of the annular channel, the left annular inner edge is located between the left inertia ball and the left movable barrel, the left arc-shaped linkage rod penetrates through a left inner ring of the left annular inner edge, a left return spring is further sleeved on the outer side of the left arc-shaped linkage rod, and two ends of the left return spring elastically press the left annular inner edge and the left end wall of the left movable barrel respectively;
the clockwise end of the right arc-shaped linkage rod is fixedly connected with the right end wall of the right movable cylinder; the anti-clockwise end fixedly connected with right inertia ball of right side arc gangbar, right side inertia ball with annular channel inner wall sliding fit, the annular channel inner wall still fixedly is provided with right annular inner edge, right annular inner edge be located right side inertia ball with between the right side activity barrel, right side arc gangbar passes the right inner circle of right side annular inner edge, right side arc gangbar outside still overlaps and is equipped with right return spring, right return spring both ends elasticity roof pressure respectively the right end wall of right side annular inner edge and right side activity barrel.
Furthermore, a plurality of first air pressure balance holes and a plurality of second air pressure balance holes are respectively arranged on the left end wall of the left movable cylinder body and the right end wall of the right movable cylinder body; the two ends of the air pressure balance pipe are used for communicating the annular channels on the two sides of the left inertia ball with each other.
Has the advantages that: the four-direction independent sensor is simple in structure, and the structural characteristics of the sensors ensure that the safety airbag cannot be triggered in the normal braking and deceleration process of the automobile under the special non-violent collision scenes such as lifting, side turning (slow side turning caused by non-collision), dragging and the like when the automobile is collided with low strength and jolts up and down violently, so that the reliability of the safety airbag is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the device;
FIG. 2 is a front view of the present apparatus;
FIG. 3 is a top view of the apparatus;
FIG. 4 is a schematic diagram of a four sensor arrangement;
FIG. 5 is a schematic structural diagram of a "front impact mercury switch sensor";
FIG. 6 is a schematic perspective view of FIG. 5;
FIG. 7 is a schematic view of the cutaway structure of FIG. 6;
FIG. 8 is an enlarged schematic view of the inner edge of the inertial free-ball retainer of FIG. 7;
FIG. 9 is a schematic front view of the structure of FIG. 6;
FIG. 10 is a first cross-sectional view of the annular tube;
FIG. 11 is a second cross-sectional view of the annular tube;
FIG. 12 is a third schematic sectional view of the annular tube;
FIG. 13 is a schematic view of a left movable cylinder and a right movable cylinder when they are close to each other;
FIG. 14 is a schematic view of the left and right movable barrels being in flow-diversion with each other.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
On a high-grade automobile, the safety airbags to be triggered by front and rear side collision and left and right side violent collision of an automobile body are different, for example, the front part is collided to start the airbag near a steering wheel, and the side part is collided to start the safety airbag near a window, so the system needs to separately judge four-direction collision, namely, the front part is collided with the front part, the rear part, the left and right directions, the system is realized by adopting four independent sensors, the triggering of each sensor corresponds to the collision in one direction, and specifically, the sensor triggering system of the automobile safety airbags shown in figures 1 to 14 comprises a sensor base 27 horizontally arranged on the automobile, and a front collision mercury switch sensor 30.2, a rear collision mercury switch sensor 30.4, a left collision mercury switch sensor 30.1 and a right collision mercury switch sensor 30.3 are arranged on the sensor base 27; the front collision mercury switch sensor 30.2, the rear collision mercury switch sensor 30.4, the left collision mercury switch sensor 30.1 and the right collision mercury switch sensor 30.3 are distributed in a circumferential array by taking the axis of the sensor base 27 as the center;
the sensor base 27 of the embodiment is a disc structure, and the disc structure of the sensor base 27 is further provided with flange holes 29 in a circumferential array along the circumferential direction, so that the sensor base is horizontally fixed on a chassis of an automobile; an annular support 26 is coaxially arranged above the sensor base 27, the annular support 26 is fixedly connected with the sensor base 27 through a plurality of support columns (25), the annular support 26 is respectively in supporting connection with a front collision mercury switch sensor 30.2, a rear collision mercury switch sensor 30.4, a left collision mercury switch sensor 30.1 and a right collision mercury switch sensor 30.3 through four support arms 25, and the four sensors are stably supported on the sensor base 27;
when the front side, the rear side, the left side and the right side of the vehicle body are respectively collided violently, the front collision mercury switch sensor 30.2, the rear collision mercury switch sensor 30.4, the left collision mercury switch sensor 30.1 and the right collision mercury switch sensor 30.3 are correspondingly triggered; the front collision mercury switch sensor 30.2, the rear collision mercury switch sensor 30.4, the left collision mercury switch sensor 30.1 and the right collision mercury switch sensor 30.3 of the present embodiment are all the same in structure, and the front collision mercury switch sensor 30.2, the rear collision mercury switch sensor 30.4, the left collision mercury switch sensor 30.1 and the right collision mercury switch sensor 30.3 are respectively arranged in four directions, front, rear, left and right;
any one of the front collision mercury switch sensor 30.2, the rear collision mercury switch sensor 30.4, the left collision mercury switch sensor 30.1 and the right collision mercury switch sensor 30.3 comprises a mercury inertial climbing pipe 10 which obliquely ascends in a smooth arc shape, a mercury inertial climbing channel 9 is arranged in the mercury inertial climbing pipe 10, inert gas is filled in the mercury inertial climbing channel 9, and the lower part in the mercury inertial climbing channel 9 is filled with a mass of liquid mercury 7; since the four sensors are identical except for their orientation, for the sake of brief description, reference will be made hereinafter to the "front impact mercury switch sensor 30.2" as an example:
the lower end of a mercury inertial climbing channel 9 of a front collision mercury switch sensor 30.2 is provided with an annular inertial movable ball limiting inner edge 5, an inertial movable ball 6 is coaxially and movably arranged in the mercury inertial climbing channel 9, the outer diameter of the inertial movable ball 6 is consistent with the inner diameter of the mercury inertial climbing channel 9, in particular, the inertial movable ball 6 is in sliding fit with the inner wall of the mercury inertial climbing channel 9, the inertial movable ball 6 of the embodiment adopts a steel ball precisely polished by a roller polishing method, the surface roughness of the inertial movable ball 6 reaches Ra0.01 mu m, so that the inertial movable ball 6 is ensured to move smoothly in the mercury inertial climbing channel 9, the reliability of the sensor is ensured, the inertial movable ball 6 can move along the mercury inertial climbing channel 9, the inertial movable ball 6 is positioned between a mass of liquid mercury 7 and the inertial movable ball limiting inner edge 5, the mass of liquid mercury 7 extrudes the inertial movable ball 6 all the time under the action of gravity, the inertia movable ball 6 is coaxially abutted against the limit inner edge 5 of the inertia movable ball; the inner limit edge 5 of the inertia movable ball is made of rubber or silica gel, and the inertia movable ball 6 blocks the lower end of the mercury inertia climbing channel 9.
The upper end of the mercury inertial ascending pipe 10 is integrally communicated with a mercury cut-off pipe 12 coaxially, a mercury climbing channel 11 is arranged in the mercury cut-off pipe 12, a mercury cut-off valve core 23 is arranged in the mercury climbing channel 11, and the mercury cut-off valve core 23 can cut off and block the mercury climbing channel 11; the upper end of the mercury cutting tube 12 is integrally communicated with an electrode tube 20 coaxially through a reducing tube 21, and a mercury conducting channel 14 is arranged inside the electrode tube 20; the lower end of the mercury inertia climbing pipe 10 is integrally communicated with a vertical negative pressure vertical pipe 2 through a bent pipe 4, a negative pressure cavity 3 is formed inside the negative pressure vertical pipe 2, a normal pressure cavity filled with inert gas is formed in the negative pressure cavity 3 in an initial state, and the inertia movable ball 6 can enable the negative pressure cavity 3 to generate negative pressure after moving upwards along the mercury inertia climbing channel 9 instantly; the upper end of the mercury conducting channel 14 is communicated with the negative pressure cavity 3 through a return pipe 8;
the mercury-free safety airbag device further comprises an airbag controller 18, the airbag controller 18 is triggered when a first electrode 19 and a second electrode 15 which are led out from the airbag controller 18 are electrically communicated, the first electrode 19 and the second electrode 15 are arranged in the mercury conducting channel 14 in a spaced mode, and when mercury liquid flows through the mercury conducting channel 14, the first electrode 19 is electrically communicated with the second electrode 15.
The mercury vapor interception tube further comprises a horizontal annular tube 22, and the inner diameter and the outer diameter of the annular tube 22 are the same as those of the mercury interception tube 12; the annular tube 22 is integrally connected with the mercury cut-off tube 12, an annular channel 41 in the annular tube 22 is communicated with a mercury climbing channel 11 in the mercury cut-off tube 12, and the center line of the ring body of the annular tube 22 is intersected with the axis of the mercury cut-off tube 12;
the mercury cut-off valve core 23 is positioned at the communication position of the annular channel 41 and the mercury climbing channel 11, the mercury cut-off valve core 23 comprises a left movable cylinder 23.1 and a right movable cylinder 23.2 which are bilaterally symmetrical, the left movable cylinder 23.1 and the right movable cylinder 23.2 of the embodiment are not of a standard straight cylinder structure but of a bent cylinder structure, specifically, the outer walls of the left movable cylinder 23.1 and the right movable cylinder 23.2 are both in sliding fit with the inner wall of the annular pipe 22, and the left movable cylinder 23.1 and the right movable cylinder 23.2 can both slide along the annular channel 41 in the annular pipe 22; when the left movable cylinder 23.1 and the right movable cylinder 23.2 contact each other at the communication part of the annular channel 41 and the mercury climbing channel 11, the mercury climbing channel 11 is cut off; when the left movable cylinder 23.1 and the right movable cylinder 23.2 are separated from each other, the mercury climbing channel 11 is in a smooth state; a left arc-shaped linkage rod 33 and a right arc-shaped linkage rod 34 are symmetrically arranged in the annular channel 41 from left to right, and the circle centers of the arc structures of the left arc-shaped linkage rod 33 and the right arc-shaped linkage rod 34 are coincided with the axis of the annular channel 41; the arc lengths of the left arc-shaped linkage rod 33 and the right arc-shaped linkage rod 34 are the same, and the central angles of the left arc-shaped linkage rod 33 and the right arc-shaped linkage rod 34 are both 80-100 degrees;
the counterclockwise end of the left arc-shaped linkage rod 33 is fixedly connected with the left end wall 39 of the left movable cylinder 23.1; a left inertia ball 35 is fixedly connected to the clockwise end of the left arc-shaped linkage rod 33, the left inertia ball 35 is in sliding fit with the inner wall of the annular channel 41, a left annular inner edge 63 is further fixedly arranged on the inner wall of the annular channel 41, the left annular inner edge 63 is located between the left inertia ball 35 and the left movable barrel 23.1, the left arc-shaped linkage rod 33 penetrates through a left inner ring 61 of the left annular inner edge 63, a left return spring 31 is further sleeved on the outer side of the left arc-shaped linkage rod 33, and two ends of the left return spring 31 respectively elastically press the left annular inner edge 63 and the left end wall 39 of the left movable barrel 23.1; the clockwise end of the right arc-shaped linkage rod 34 is fixedly connected with the right end wall 40 of the right movable cylinder 23.2; the anti-clockwise end of the right arc linkage rod 34 is fixedly connected with a right inertia ball 36, the right inertia ball 36 is in sliding fit with the inner wall of the annular channel 41, the inner wall of the annular channel 41 is further fixedly provided with a right annular inner edge 64, the right annular inner edge 64 is positioned between the right inertia ball 36 and the right movable barrel 23.2, the right arc linkage rod 34 penetrates through a right inner ring 62 of the right annular inner edge 64, the outer side of the right arc linkage rod 34 is further sleeved with a right return spring 32, and two ends of the right return spring 32 respectively elastically press against the right annular inner edge 64 and the right end wall 40 of the right movable barrel 23.2.
In order to ensure the air pressure balance at any position in the annular channel 41, prevent the air pressure difference at different positions in the annular channel 41 from causing great interference to the movement of the right inertia ball 36 and the left inertia ball 35, and ensure that the annular channel 41 is completely isolated from the outside because the sensor has mercury liquid inside, a plurality of first air pressure balance holes 37 and a plurality of second air pressure balance holes 38 are respectively arranged on the left end wall 39 of the left movable cylinder 23.1 and the right end wall 40 of the right movable cylinder 23.2 in the embodiment; the structure of the left inertia ball 35 comprises a left inertia ball and a right inertia ball, and further comprises an air pressure balance pipe 24, wherein the annular channels 41 on the two sides of the left inertia ball 35 are mutually communicated by the two ends of the air pressure balance pipe 24, so that the problem of air pressure difference is solved, the annular channels 41 are not communicated with the outside, and the problem of mercury vapor leakage is not worried;
taking the "front impact mercury switch sensor 30.2" as an example, the specific airbag triggering process and the purpose of the design of the structure are as follows:
because certain friction force is generated when the outer walls of the left movable cylinder 23.1 and the right movable cylinder 23.2 and the inner wall of the annular channel 41 slide with each other in the structure, certain interference can be caused, and then the threshold value of the mutual separation of the left movable cylinder 23.1 and the right movable cylinder 23.2 due to the inertial motion of the right inertial ball 36 and the left inertial ball 35 cannot be accurately obtained, the mutual separation of the left movable cylinder 23.1 and the right movable cylinder 23.2 is not used as the triggering threshold value of the collision strength of the automobile in the scheme; the throwing height of the liquid mercury with higher sensitivity due to inertia is used as a triggering threshold value for triggering the safety airbag; the specific idea is as follows:
in the normal braking and decelerating process of the automobile: the forward inertia force formed by the left inertia ball 35 and the right inertia ball 36 cannot overcome the resilience force of the left return spring 31 and the right return spring 32, and the left inertia ball 35 and the right inertia ball 36 cannot move in the annular channel 41, so that the left movable cylinder 23.1 and the right movable cylinder 23.2 are still in a state of coaxial contact with each other, and at the moment, the mercury climbing channel 11 is in a cut-off state;
when the automobile is violently bumped up and down: at this time, a mass of liquid mercury 7 in the mercury inertia climbing channel 9 vibrates up and down, so that splashing may occur, but because the left inertia ball 35 and the right inertia ball 36 do not move in the annular channel 41 due to no front-back collision, the left movable cylinder 23.1 and the right movable cylinder 23.2 are still in a state of coaxial contact with each other, at this time, the mercury climbing channel 11 is in a cut-off state, a mass of liquid mercury 7 in the mercury inertia climbing channel 9 cannot pass through the mercury climbing channel 11, so that the liquid mercury cannot reach the mercury conductive channel 14 in the state, and the airbag cannot be triggered;
the automobile is hoisted, turned on one side (slow turning caused by non-collision), dragged and the like under special scenes of non-violent collision: in this state, the overall posture of the automobile is changed, and since mercury is liquid, a mass of liquid mercury 7 in the mercury inertia climbing channel 9 flows to the mercury climbing channel 11 under the action of gravity, but since the mercury inertia climbing channel is not collided front and back at this time, the left inertia ball 35 and the right inertia ball 36 do not move in the annular channel 41, so that the left movable cylinder 23.1 and the right movable cylinder 23.2 are still in a mutually coaxial contact state, at this time, the mercury climbing channel 11 is in a cut-off state, and a mass of liquid mercury 7 in the mercury inertia climbing channel 9 cannot pass through the mercury climbing channel 11, so that the mercury in this state cannot reach the mercury conductive channel 14, and the airbag cannot be triggered;
the automobile is subjected to low-intensity collision (when the collision intensity reaches about 60% to 70% of the preset trigger threshold): the left inertia ball 35 and the right inertia ball 36 are enough to overcome the resilience force of the left return spring 31 and the right return spring 32, the left inertia ball 35 and the right inertia ball 36 instantly move forward for a certain distance under the left and right inertia, so that the left movable cylinder 23.1 and the right movable cylinder 23.2 are instantly separated from each other under the driving of the left arc-shaped linkage rod 33 and the right arc-shaped linkage rod 34, and the mercury climbing channel 11 is in a smooth state; however, since the collision strength does not reach the preset threshold, a lump of liquid mercury 7 in the mercury inertia climbing channel 9 still cannot be smoothly thrown to the height of the reducer 21 under the action of the inertia force, and further cannot reach the reducer, so that the mercury cannot reach the mercury conducting channel 14 in this state, and the airbag cannot be triggered;
when the automobile is subjected to a high-intensity collision (the collision intensity reaches or exceeds 100% of a preset triggering threshold value): the left inertia ball 35 and the right inertia ball 36 are far enough to overcome the resilience force of the left return spring 31 and the right return spring 32, the left inertia ball 35 and the right inertia ball 36 instantly move forward for a certain distance under the left and right inertia, so that the left movable cylinder 23.1 and the right movable cylinder 23.2 are instantly separated from each other under the rigid drive of the left arc-shaped linkage rod 33 and the right arc-shaped linkage rod 34, and the mercury climbing channel 11 is in a smooth state; because the collision strength reaches a preset threshold value, a mass of liquid mercury 7 in the mercury inertia climbing channel 9 is instantly thrown upwards along the mercury inertia climbing channel 9 to pass through the mercury climbing channel 11 under the action of forward inertia force and reaches the reducing pipe 21; meanwhile, the inertia movable ball 6 also moves forward for a distance along the path of the mercury inertia climbing channel 9 under the forward inertia effect, so that negative pressure is formed in the negative pressure cavity 3 instantly, positive pressure is formed in the mercury inertia climbing channel 9 instantly, negative pressure is formed in the mercury conducting channel 14 under the action of the return pipe 8, mercury liquid reaching the reducing pipe 21 instantly flows through the mercury conducting channel 14 to reach the return pipe 8 under the comprehensive effect of inertia and air pressure difference, so that the first electrode 19 is electrically communicated with the second electrode 15, and the airbag controller 18 is triggered quickly after the first electrode 19 is electrically communicated with the second electrode 15, so that the airbag is opened.
The above is only a preferred embodiment of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. Sensor trigger system of car air bag, its characterized in that: the automobile collision detection device comprises a sensor base (27) horizontally arranged on an automobile, wherein a front collision mercury switch sensor (30.2), a rear collision mercury switch sensor (30.4), a left collision mercury switch sensor (30.1) and a right collision mercury switch sensor (30.3) are arranged on the sensor base (27); the front collision mercury switch sensor (30.2), the rear collision mercury switch sensor (30.4), the left collision mercury switch sensor (30.1) and the right collision mercury switch sensor (30.3) are distributed in a circumferential array by taking the axis of the sensor base (27) as the center;
when the front side, the rear side, the left side and the right side of the vehicle body are respectively collided violently, a front collision mercury switch sensor (30.2), a rear collision mercury switch sensor (30.4), a left collision mercury switch sensor (30.1) and a right collision mercury switch sensor (30.3) are triggered correspondingly;
the front collision mercury switch sensor (30.2), the rear collision mercury switch sensor (30.4), the left collision mercury switch sensor (30.1) and the right collision mercury switch sensor (30.3) are identical in structure, and the front collision mercury switch sensor (30.2), the rear collision mercury switch sensor (30.4), the left collision mercury switch sensor (30.1) and the right collision mercury switch sensor (30.3) are respectively arranged in four directions, namely front, rear, left and right directions;
any one of the front collision mercury switch sensor (30.2), the rear collision mercury switch sensor (30.4), the left collision mercury switch sensor (30.1) and the right collision mercury switch sensor (30.3) comprises a mercury inertial climbing pipe (10) which obliquely rises in a smooth arc shape, a mercury inertial climbing channel (9) is arranged in the mercury inertial climbing pipe (10), and the lower part in the mercury inertial climbing channel (9) is filled with a mass of liquid mercury (7);
an annular inertia movable ball limiting inner edge (5) is arranged at the lower end of the mercury inertia climbing channel (9), an inertia movable ball (6) is movably arranged in the mercury inertia climbing channel (9) coaxially and coaxially, the inertia movable ball (6) is in sliding fit with the inner wall of the mercury inertia climbing channel (9), the inertia movable ball (6) can move along the mercury inertia climbing channel (9), the inertia movable ball (6) is positioned between the mass of liquid mercury (7) and the inertia movable ball limiting inner edge (5), and the mass of liquid mercury (7) always extrudes the inertia movable ball (6) under the action of gravity, so that the inertia movable ball (6) coaxially abuts against the inertia movable ball limiting inner edge (5);
the limiting inner edge (5) of the inertia movable ball is made of rubber or silica gel, and the inertia movable ball (6) plugs the lower end of the mercury inertia climbing channel (9);
the upper end of the mercury inertial ascending pipe (10) is integrally communicated with a mercury cut-off pipe (12) coaxially, a mercury climbing channel (11) is arranged in the mercury cut-off pipe (12), a mercury cut-off valve core (23) is arranged in the mercury climbing channel (11), and the mercury cut-off valve core (23) can cut off and block the mercury climbing channel (11); the upper end of the mercury cut-off pipe (12) is integrally communicated with an electrode pipe (20) through a reducing pipe (21) coaxially, and a mercury conducting channel (14) is arranged inside the electrode pipe (20); the lower end of the mercury inertia riser (10) is integrally communicated with a vertical negative pressure vertical pipe (2) through a bent pipe (4), and a negative pressure cavity (3) is formed inside the negative pressure vertical pipe (2); the upper end of the mercury conducting channel (14) is communicated with the negative pressure cavity (3) through a return pipe (8);
the safety airbag control device is characterized by further comprising an air bag controller (18), the air bag controller (18) is triggered when a first electrode (19) and a second electrode (15) led out from the air bag controller (18) are electrically communicated, the first electrode (19) and the second electrode (15) are arranged in the mercury conducting channel (14) at intervals, and when mercury liquid flows through the mercury conducting channel (14), the first electrode (19) is electrically communicated with the second electrode (15);
the mercury vapor-liquid separation device further comprises a horizontal annular tube (22), and the inner diameter and the outer diameter of the annular tube (22) are the same as those of the mercury cut-off tube (12); the annular tube (22) is integrally connected with the mercury cut-off tube (12), an annular channel (41) in the annular tube (22) is communicated with a mercury climbing channel (11) in the mercury cut-off tube (12), and the center line of a ring body of the annular tube (22) is intersected with the axis of the mercury cut-off tube (12);
the mercury cut-off valve core (23) is positioned at the communication position of the annular channel (41) and the mercury climbing channel (11), the mercury cut-off valve core (23) comprises a left movable cylinder (23.1) and a right movable cylinder (23.2) which are bilaterally symmetrical, the outer walls of the left movable cylinder (23.1) and the right movable cylinder (23.2) are in sliding fit with the inner wall of the annular pipe (22), and the left movable cylinder (23.1) and the right movable cylinder (23.2) can slide along the annular channel (41) in the annular pipe (22); when the left movable cylinder (23.1) and the right movable cylinder (23.2) are in contact with each other at the communication part of the annular channel (41) and the mercury climbing channel (11), the mercury climbing channel (11) is cut off; when the left movable cylinder (23.1) and the right movable cylinder (23.2) are separated from each other, the mercury climbing channel (11) is in a smooth state; a left arc-shaped linkage rod (33) and a right arc-shaped linkage rod (34) are symmetrically arranged in the annular channel (41) from left to right, and the circle centers of the arc structures of the left arc-shaped linkage rod (33) and the right arc-shaped linkage rod (34) are coincided with the axis of the annular channel (41); the arc lengths of the left arc-shaped linkage rod (33) and the right arc-shaped linkage rod (34) are the same, and the central angles of the left arc-shaped linkage rod (33) and the right arc-shaped linkage rod (34) are both 80-100 degrees;
the anticlockwise end of the left arc-shaped linkage rod (33) is fixedly connected with the left end wall (39) of the left movable cylinder body (23.1); a left inertia ball (35) is fixedly connected to the clockwise end of the left arc-shaped linkage rod (33), the left inertia ball (35) is in sliding fit with the inner wall of the annular channel (41), a left annular inner edge (63) is further fixedly arranged on the inner wall of the annular channel (41), the left annular inner edge (63) is located between the left inertia ball (35) and the left movable barrel (23.1), the left arc-shaped linkage rod (33) penetrates through a left inner ring (61) of the left annular inner edge (63), a left return spring (31) is further sleeved on the outer side of the left arc-shaped linkage rod (33), and two ends of the left return spring (31) respectively elastically press the left annular inner edge (63) and a left end wall (39) of the left movable barrel (23.1);
the clockwise end of the right arc-shaped linkage rod (34) is fixedly connected with the right end wall (40) of the right movable cylinder body (23.2); the anti-clockwise end fixedly connected with right inertia ball (36) of right side arc gangbar (34), right side inertia ball (36) with annular channel (41) inner wall sliding fit, annular channel (41) inner wall still fixedly is provided with right annular inner edge (64), right side annular inner edge (64) are located right side inertia ball (36) with between the barrel (23.2) is moved to the right side, right side arc gangbar (34) pass right inner circle (62) of right side annular inner edge (64), right side arc gangbar (34) outside still overlaps and is equipped with right return spring (32), right return spring (32) both ends respectively the elasticity roof pressure right side annular inner edge (64) and right end wall (40) of the barrel (23.2) are moved to the right side.
2. The sensor trigger system for an automotive airbag according to claim 1, characterized in that: a plurality of first air pressure balance holes (37) and a plurality of second air pressure balance holes (38) are respectively formed in the left end wall (39) of the left movable cylinder (23.1) and the right end wall (40) of the right movable cylinder (23.2); the air pressure balance device further comprises an air pressure balance pipe (24), and two ends of the air pressure balance pipe (24) are used for communicating the annular channels (41) on two sides of the left inertia ball (35).
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| CN202010213334.2A CN111332240B (en) | 2020-03-24 | 2020-03-24 | Sensor triggering system of automobile safety air bag |
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| CN202010213334.2A CN111332240B (en) | 2020-03-24 | 2020-03-24 | Sensor triggering system of automobile safety air bag |
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| CN111332240B true CN111332240B (en) | 2022-03-18 |
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| CN112224164B (en) * | 2020-08-24 | 2022-02-22 | 盐城工业职业技术学院 | Automobile anti-collision azimuth sensor, circuit and working method |
| CN112985789B (en) * | 2021-02-05 | 2023-01-24 | 无锡商业职业技术学院 | Durability experiment detection device for mechanical equipment control switch |
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| CN1562669A (en) * | 2004-03-30 | 2005-01-12 | 崔志春 | Device for cross controlled distance light of car and playing crashworthy function when car being met with a obstacle |
| CN105752015A (en) * | 2016-05-13 | 2016-07-13 | 昆山浩硕精密机械有限公司 | Automobile safety airbag control system |
| CN211809488U (en) * | 2020-03-24 | 2020-10-30 | 无锡商业职业技术学院 | Triggering error-proofing mechanism of collision sensor of automobile safety air bag |
| CN211957522U (en) * | 2020-03-24 | 2020-11-17 | 无锡商业职业技术学院 | Mercury switch of automobile safety air bag |
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| CN1562669A (en) * | 2004-03-30 | 2005-01-12 | 崔志春 | Device for cross controlled distance light of car and playing crashworthy function when car being met with a obstacle |
| CN105752015A (en) * | 2016-05-13 | 2016-07-13 | 昆山浩硕精密机械有限公司 | Automobile safety airbag control system |
| CN211809488U (en) * | 2020-03-24 | 2020-10-30 | 无锡商业职业技术学院 | Triggering error-proofing mechanism of collision sensor of automobile safety air bag |
| CN211957522U (en) * | 2020-03-24 | 2020-11-17 | 无锡商业职业技术学院 | Mercury switch of automobile safety air bag |
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