CN209248264U - A kind of automobile airbag restraint system control device - Google Patents
A kind of automobile airbag restraint system control device Download PDFInfo
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- CN209248264U CN209248264U CN201822172478.9U CN201822172478U CN209248264U CN 209248264 U CN209248264 U CN 209248264U CN 201822172478 U CN201822172478 U CN 201822172478U CN 209248264 U CN209248264 U CN 209248264U
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Abstract
The utility model discloses a kind of automobile airbag restraint system control device, including scanning matrix circuit and controller, the communication output end of the controller connects safe automobile air bag；The scanning matrix circuit includes that four testing resistance rows and N number of testing resistance arrange, each testing resistance row includes an on-off detection resistance, and one-to-one testing resistance is arranged with each testing resistance, the first end of the first end of the testing resistance and the on-off detection resistance is all connected with the source electrode of corresponding scanning metal-oxide-semiconductor；The drain electrode of four scanning metal-oxide-semiconductors is all connected with the second end of shunt resistance, and the first end of shunt resistance connects the anode of the first power supply, the cathode ground connection of the first power supply；The second end of on-off detection resistance on four testing resistance rows is connected；The second end of four testing resistances on each testing resistance column is connected as the column sampled point of testing resistance column, and the column sampled point of each testing resistance column is all connected with the first end of corresponding compensation resistance and the first end of corresponding detection resistance.
Description
Technical field
The utility model relates to a kind of automobile airbag restraint system control devices.
Background technique
With being significantly increased for car ownership, the harmfulness of traffic accident starts to be taken seriously.The safety of car steering
Protection also becomes more and more important.Earliest safety belt has played critically important protective effect from after utility model, but
When strong collision occurs, the head of front stall driver and chest are still highly susceptible to injure, and then air bag is just absurd fantastic
It is raw.Safe automobile air bag is configured as the auxiliary of vehicle body passive safety, is increasingly valued by people.When automobile and obstacle
Object collision, i.e., after primary collision, occupant collides with interior component, i.e. secondary collision.Air bag after primary collision, secondary touch
A gassiness air cushion is opened before hitting rapidly, " flutter on air cushion " to mitigate when moving occupant because of inertia occupant by
To impact and absorb collision energy, mitigate the extent of injury of occupant.
With being rooted in the hearts of the people for vehicle passive security importance, after using passenger airbag, due to safety and insurance
Reason needs to identify on seat whether have occupant, when there is no occupant on seat because traffic accident occurs there is no need to
Airbag opening, in order to avoid spend unnecessary air bag maintenance cost.But traditional automobile airbag restraint system control device, to the greatest extent
Pipe uses resistor matrix circuit, but since the real time resistance value of testing resistance each in resistor matrix can not be measured accurately,
Control of the controller for air bag is affected, so that air bag is often opened when no occupant, or is being occurred
It can not be opened after fierce impact.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of safe automobile air bag control dress
It sets, can effectively improve the accuracy and speed when the real time resistance value of each testing resistance in measurement resistor matrix, reduce
Measure the cost of the real time resistance value of each testing resistance in testing resistance matrix.
Realizing a kind of technical solution of above-mentioned purpose is: a kind of automobile airbag restraint system control device, including scan matrix electricity
Road and controller, the CAN communication output end safe automobile air bag of the controller；
The scanning matrix circuit includes four testing resistance rows, N number of testing resistance column and the first power supply and the second electricity
Source；
The corresponding scanning metal-oxide-semiconductor of each testing resistance row, including an on-off detection resistance, and with each electricity to be measured
Resistance arranges one-to-one testing resistance；
The first end of the testing resistance and the first end of the on-off detection resistance are all connected with corresponding scanning metal-oxide-semiconductor
Source electrode；
The drain electrode of four scanning metal-oxide-semiconductors is all connected with the second end of shunt resistance, and the first end of the shunt resistance connects
Connect the anode of the first power supply, the cathode ground connection of the first power supply；
The second end of on-off detection resistance on four testing resistance rows is connected；
Each testing resistance arranges and corresponds to a compensation resistance and a detection resistance, four on each testing resistance column
The second end of testing resistance is connected as the column sampled point of testing resistance column, and the column sampled point of each testing resistance column is all connected with
The first end of corresponding compensation resistance and the first end of corresponding detection resistance；
The second end of all detection resistances connects the current detecting port of the controller simultaneously；
When the controller measures the electric current of any one testing resistance column, corresponding compensation resistance connects the control
The compensation port of device, the anode of remaining compensation resistance connection second source, the cathode ground connection of second source；
The second end of the shunt resistance connects two voltage detecting ports of the controller, four scannings simultaneously
Metal-oxide-semiconductor corresponds to the power supply of cathode ground connection, a swept resistance is respectively connected on the gate pole of four scanning metal-oxide-semiconductors, in institute
When stating controller and measuring the voltage of any one testing resistance row, swept resistance ground connection on the gate pole of corresponding scanning metal-oxide-semiconductor,
The anode of remaining swept resistance connection corresponding power；
The testing resistance is varistor.
Further, the automobile airbag restraint system control device further includes the third power supply of cathode ground connection, four scanning MOS
Guan Zhong, corresponding first power supply of a scanning metal-oxide-semiconductor, a scanning metal-oxide-semiconductor correspond to third power supply, remaining two scanning metal-oxide-semiconductor
Corresponding second source.
Further, the protective resistance of a ground connection is respectively connected on the column sampled point of each testing resistance column.
Further, the varistor is Non-linear pressure sensitive resistance.
Further, the columns of the testing resistance column is eight column.
Further, the controller is placed between upper housing and lower case, and the scanning matrix circuit is placed in resistance inspection
It surveys under sensor mat.
Using a kind of technical solution of automobile airbag restraint system control device of the utility model, including scanning matrix circuit
And controller, the CAN communication output end safe automobile air bag of the controller；The scanning matrix circuit includes four electricity to be measured
Resistance row, N number of testing resistance column and the first power supply and second source；The corresponding scanning metal-oxide-semiconductor of each testing resistance row, packet
An on-off detection resistance is included, and arranges one-to-one testing resistance with each testing resistance；The first of the testing resistance
The first end of end and the on-off detection resistance is all connected with the source electrode of corresponding scanning metal-oxide-semiconductor；The drain electrode of four scanning metal-oxide-semiconductors
It is all connected with the second end of shunt resistance, the first end of the shunt resistance connects the anode of the first power supply, the first power supply
Cathode ground connection；The second end of on-off detection resistance on four testing resistance rows is connected；Each testing resistance column corresponding one
A compensation resistance and a detection resistance, it is to be measured that the second end for four testing resistances that each testing resistance arranges is connected as this
The column sampled point of resistive column, the column sampled point of each testing resistance column are all connected with the first end of corresponding compensation resistance and correspond to inspection
The first end of measuring resistance；The second end of all detection resistances connects the current detecting port of the controller simultaneously；Institute
When stating controller and measuring the electric current of any one testing resistance column, corresponding compensation resistance connects the compensating end of the controller
Mouthful, the anode of remaining compensation resistance connection second source, the cathode ground connection of second source；The second end of the shunt resistance
While two voltage detecting ports of the controller are connected, and the power supply of the corresponding cathode ground connection of four scanning metal-oxide-semiconductors, four
It is respectively connected with a swept resistance on the gate pole of a scanning metal-oxide-semiconductor, measures any one testing resistance row in the controller
When voltage, the swept resistance on the gate pole of corresponding scanning metal-oxide-semiconductor is grounded, remaining swept resistance connects the anode of corresponding power；
The testing resistance is varistor.Its technical effect is that: it can effectively improve each testing resistance in measurement resistor matrix
Real time resistance value when accuracy and speed, reduce the real time resistance value of each testing resistance in measurement testing resistance matrix
Cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the scanning matrix circuit of automobile airbag restraint system control device of the utility model.
Fig. 2 is a kind of structural schematic diagram of the scanning matrix circuit of automobile airbag restraint system control device of the utility model.
Fig. 3 is a kind of scheme of installation of automobile airbag restraint system control device of the utility model.
Specific embodiment
Please refer to Fig.1 to Fig.3, the inventor of the utility model in order to preferably to the technical solution of the utility model into
Row understands, below by specifically embodiment, and will be described in detail with reference to the accompanying drawings:
A kind of automobile airbag restraint system control device of the utility model includes scanning matrix circuit 1, controller 2 and automobile peace
Full air bag, safe automobile air bag connect the CAN communication output end of controller 2 by CAN bus.
Scanning matrix circuit 1 includes the axial direction along automotive seat, the first power supply K1 for setting gradually, shunt resistance R0,
First scanning metal-oxide-semiconductor T1, the second scanning metal-oxide-semiconductor T2, the third scanning of scanning metal-oxide-semiconductor T3 and the 4th metal-oxide-semiconductor T4.
The cathode of first power supply K1 is grounded, and the first end of the anode connection shunt resistance R0 of the first power supply K1 shunts electricity
The drain electrode, the drain electrode of the second scanning metal-oxide-semiconductor T2, third for hindering the second end the first scanning of connection simultaneously metal-oxide-semiconductor T1 of R0 scan MOS
The drain electrode of the drain electrode of pipe T3 and the 4th scanning metal-oxide-semiconductor T4.
Scanning matrix circuit 1 further includes the first testing resistance row for connecting the source electrode of the first scanning metal-oxide-semiconductor T1, connection second
Scan metal-oxide-semiconductor T2 source electrode the second testing resistance row, connection third scanning metal-oxide-semiconductor T3 source electrode third testing resistance row,
Connect the 4th testing resistance row of the source electrode of the 4th scanning metal-oxide-semiconductor T4.
First testing resistance row include first end connection first scanning metal-oxide-semiconductor T1 source electrode testing resistance R11 to
Source electrode the first on-off detection resistance R10 of measuring resistance R18 and the first scanning of first end connection metal-oxide-semiconductor T1.
Second testing resistance row include first end connection second scanning metal-oxide-semiconductor T2 source electrode testing resistance R21 to
Second on-off detection resistance R20 of the source electrode of measuring resistance R28 and the second scanning of first end connection metal-oxide-semiconductor T2.
Third testing resistance row include first end connection third scanning metal-oxide-semiconductor T3 source electrode testing resistance R31 to
The third on-off detection resistance R30 of the source electrode of measuring resistance R38 and first end connection third scanning metal-oxide-semiconductor T3.
4th testing resistance row include first end connection the 4th scanning metal-oxide-semiconductor T4 source electrode testing resistance R41 to
4th on-off detection resistance R40 of the source electrode of the 4th scanning metal-oxide-semiconductor T4 of measuring resistance R48 and first end connection.
First on-off detection resistance R10 the second end, the second end of the second on-off detection resistance R2, the detection of third on-off
What the second end of the second end of resistance R30 and the 4th on-off detection resistance R40 were connected to.
Testing resistance R11, testing resistance R21, testing resistance R31 and testing resistance R41 form the first testing resistance column, to
Measuring resistance R11, testing resistance R21, testing resistance R31 and testing resistance R41 the second end be linked as the first testing resistance column
Column sampled point.
Testing resistance R12, testing resistance R22, testing resistance R32 and testing resistance R42 form the second testing resistance column, to
Measuring resistance R12, testing resistance R22, testing resistance R32 and testing resistance R42 the second end be linked as the second testing resistance column
Column sampled point.
Testing resistance R13, testing resistance R23, testing resistance R33 and testing resistance R43 composition third testing resistance column, to
Measuring resistance R13, testing resistance R23, testing resistance R33 and testing resistance R43 the second end be linked as third testing resistance column
Column sampled point.
Testing resistance R14, testing resistance R24, testing resistance R34 and testing resistance R44 form the 4th testing resistance column, to
Measuring resistance R14, testing resistance R24, testing resistance R34 and testing resistance R44 the second end be linked as the 4th testing resistance column
Column sampled point.
Testing resistance R15, testing resistance R25, testing resistance R35 and testing resistance R45 form the 5th testing resistance column, to
Measuring resistance R15, testing resistance R25, testing resistance R35 and testing resistance R45 the second end be linked as the 5th testing resistance column
Column sampled point.
Testing resistance R16, testing resistance R26, testing resistance R36 and testing resistance R46 form the 6th testing resistance column, to
Measuring resistance R16, testing resistance R26, testing resistance R36 and testing resistance R46 the second end be linked as the 6th testing resistance column
Column sampled point.
Testing resistance R17, testing resistance R27, testing resistance R37 and testing resistance R47 form the 7th testing resistance column, to
Measuring resistance R17, testing resistance R27, testing resistance R37 and testing resistance R47 the second end be linked as the 7th testing resistance column
Column sampled point.
Testing resistance R18, testing resistance R28, testing resistance R38 and testing resistance R48 form the 8th testing resistance column, to
Measuring resistance R18, testing resistance R28, testing resistance R38 and testing resistance R48 the second end be linked as the 8th testing resistance column
Column sampled point.
It is formed as a result, by the testing resistance matrix of four testing resistance rows and eight testing resistances column.
Meanwhile first testing resistance column column sampled point to the column sampled point that the 8th testing resistance arranges be correspondingly connected with the first inspection
Column sampled point to the 8th testing resistance of the first end of measuring resistance Rd1 to the 8th detection resistance Rd8, the first testing resistance column arranges
Column sampled point be also correspondingly connected with the first compensation resistance Rc1 to the 8th compensation resistance Rc8 first end.First testing resistance column
The column sampled point that is arranged to the 8th testing resistance of column sampled point on be also respectively connected with the protective resistance Rp of ground connection.
Scanning matrix circuit 1 further includes second source K2 and third power supply K3.The cathode and third power supply of second source K2
The cathode of K3 is grounded.
The gate pole of first scanning metal-oxide-semiconductor T1 connects the second end of the first swept resistance Rs1, the second scanning metal-oxide-semiconductor T2's
Gate pole connects the second swept resistance Rs1 the second end, and third scans the of the gate pole connection third swept resistance Rs3 of metal-oxide-semiconductor T3
The gate pole of two ends, the 4th scanning metal-oxide-semiconductor T4 connects the 4th swept resistance Rs1 the second end.
The anode of the first end connection second source K2 of first swept resistance Rs1, the first end of the second swept resistance Rs2
Portion connects the anode of the first power supply K1, the anode of the first end connection second source K2 of third swept resistance Rs3, the 4th scanning
The anode of the first end connection third power supply K3 of resistance Rs4.
The voltage detecting port s1 and voltage detecting port s2 of controller 2 are also connected on the second end of shunt resistance R0.
The voltage detecting port s1 and voltage detecting port s2 of controller 2 successively control the first scanning metal-oxide-semiconductor T1, the second scanning metal-oxide-semiconductor
T2, third scanning metal-oxide-semiconductor T3, the 4th scanning metal-oxide-semiconductor T4 successively make first end, the second scanning electricity of the first swept resistance Rs1
The first end for hindering the first end of Rs2, the first end of third swept resistance Rs3 and the 4th swept resistance Rs4 is grounded, and
The voltage at the corresponding scanning metal-oxide-semiconductor both ends of measurement, that is, correspond to the voltage of testing resistance row when any swept resistance is grounded.
The second end of first detection resistance Rd1 to the 8th detection resistance Rd8 connects the current detecting end of controller 2 simultaneously
Mouth d2.First compensation resistance Rc1 to the 8th compensate resistance Rc8 the second end simultaneously connect the compensation port d1 of controller 2 with
And the anode of third power supply K3.The compensation port d1 of controller 2 is successively connected with each compensation resistance, and make the compensation resistance with
The anode of third power supply K3 disconnects.When controller 2, which compensates port d1, to be connected with any one compensation resistance, the electricity of controller 2
Stream detection port d2 detects the electric current of corresponding testing resistance column.
Scanning matrix circuit 1 uses potential penalty method, by ranks selection mode, passes through the first compensation resistance Rc1 to the
Eight compensation resistance Rc8 are arranged to corresponding testing resistance in testing resistance matrix for electronic compensating, by swept resistance Rs1 to scanning electricity
Rs4 is hindered to testing resistance row corresponding in testing resistance matrix for electronic compensating, so that the testing resistance where in addition to measured resistance
The potential of three testing resistance rows other than row is of substantially equal.In this way, scanning metal-oxide-semiconductor by the first scanning metal-oxide-semiconductor T1 to the 4th
T4 carries out power-on voltage detection, the voltage of testing resistance row where then obtaining measured resistance by the AD conversion of controller 2 again
With the electric current of place testing resistance column, according to Ohm's law, the real time resistance value of measured resistance can be detected.In testing resistance matrix
All testing resistances be varistor, and varistor is Non-linear pressure sensitive resistance.
The resistance value of shunt resistance R0, compensation resistance Rc1 to compensation resistance Rc8 in 10 Ω between 100 Ω, all inspections
The resistance value of measuring resistance, all on-off detection resistances and all swept resistances is between 10k Ω to 100k Ω, institute
The resistance value of some protective resistances is between 1k Ω to 10k Ω.
Controller 2 detects seat by the non-linear relation between pressure suffered by each testing resistance and its real-time resistance value
Suffered pressure on chair determines the original body mass of occupant and the bottom threshold of pressure, when controller 2 detect on seat it is suffered
When dropping to bottom threshold to pressure, by airbag-releasing, controller 2 belongs to the prior art.
A kind of automobile airbag restraint system control device of the utility model can effectively improve survey by scanning matrix circuit 1
The accuracy and speed when the real time resistance value of each testing resistance in testing resistance matrix are measured, measurement testing resistance matrix is reduced
In each testing resistance real time resistance value cost, can meet product quality requirement, due to controller 2 be scan matrix electricity
The primary side on road 1 measures, and guarantees product quality, can largely save the manufacturing cost of company.
Controller 2 is mounted between upper housing 21 and lower case 22 in the present embodiment.
Scanning matrix circuit 1 is mounted under resistance detection sensor mat 3.
Scanning matrix circuit 1 is measuring the real time resistance value of testing resistance R38 in Fig. 1.
Controller 2 uses siemens PLC controller.
Positioning between resistance detection sensor mat 3 and each testing resistance is positioned using mounting hole, and positioning hole is fixed
Position size needs to exactly match the size of the ventilation hole of seat, and 3 thickness of resistance detection sensor mat is within 2mm, to greatest extent
Guarantee does not influence seat comfort degree.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate that this is practical new
Type, and be not used as the restriction to the utility model, as long as in the spirit of the utility model, to the above
Variation, the modification of embodiment will all be fallen in the Claims scope of the utility model.
Claims (6)
1. a kind of automobile airbag restraint system control device, including scanning matrix circuit and controller, the CAN communication of the controller are defeated
Outlet connects safe automobile air bag；It is characterized by:
The scanning matrix circuit includes four testing resistance rows, N number of testing resistance column and the first power supply and second source；
The corresponding scanning metal-oxide-semiconductor of each testing resistance row, including an on-off detection resistance, and arranged with each testing resistance
One-to-one testing resistance；
The first end of the testing resistance and the first end of the on-off detection resistance are all connected with the source of corresponding scanning metal-oxide-semiconductor
Pole；
The drain electrodes of four scanning metal-oxide-semiconductors are all connected with the second end of shunt resistance, and the first end of the shunt resistance connects the
The anode of one power supply, the cathode ground connection of the first power supply；
The second end of on-off detection resistance on four testing resistance rows is connected；
Each testing resistance column correspond to a compensation resistance and a detection resistance, and four on each testing resistance column are to be measured
The second end of resistance is connected as the column sampled point of testing resistance column, and the column sampled point of each testing resistance column is all connected with correspondence
Compensate the first end of resistance and the first end of corresponding detection resistance；
The second end of all detection resistances connects the current detecting port of the controller simultaneously；
When the controller measures the electric current of any one testing resistance column, corresponding compensation resistance connects the controller
Port is compensated, the anode of remaining compensation resistance connection second source, the cathode ground connection of second source；
The second end of the shunt resistance connects two voltage detecting ports of the controller, four scanning metal-oxide-semiconductors simultaneously
The power supply of cathode ground connection is corresponded to, a swept resistance is respectively connected on the gate pole of four scanning metal-oxide-semiconductors, in the control
When device measures the voltage of any one testing resistance row, the swept resistance on the gate pole of corresponding scanning metal-oxide-semiconductor is grounded, remaining is swept
Retouch the anode of resistance connection corresponding power；
The testing resistance is varistor.
2. a kind of automobile airbag restraint system control device according to claim 1, it is characterised in that: the safe automobile air bag
Control device further includes the third power supply of cathode ground connection, in four scanning metal-oxide-semiconductors, scanning metal-oxide-semiconductor first power supply of correspondence, and one
A scanning metal-oxide-semiconductor corresponds to third power supply, and remaining two scanning metal-oxide-semiconductor corresponds to second source.
3. a kind of automobile airbag restraint system control device according to claim 1, it is characterised in that: each testing resistance column
The protective resistance of a ground connection is respectively connected on column sampled point.
4. a kind of automobile airbag restraint system control device according to claim 1, it is characterised in that: the varistor is
Non-linear pressure sensitive resistance.
5. a kind of automobile airbag restraint system control device according to claim 1, it is characterised in that: the testing resistance column
Columns is eight column.
6. a kind of automobile airbag restraint system control device according to claim 1, it is characterised in that: the controller is placed in
Between shell and lower case, the scanning matrix circuit is placed under resistance detection sensor mat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822172478.9U CN209248264U (en) | 2018-12-24 | 2018-12-24 | A kind of automobile airbag restraint system control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822172478.9U CN209248264U (en) | 2018-12-24 | 2018-12-24 | A kind of automobile airbag restraint system control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209248264U true CN209248264U (en) | 2019-08-13 |
Family
ID=67534172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822172478.9U Expired - Fee Related CN209248264U (en) | 2018-12-24 | 2018-12-24 | A kind of automobile airbag restraint system control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209248264U (en) |
-
2018
- 2018-12-24 CN CN201822172478.9U patent/CN209248264U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190813 Termination date: 20201224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |