CN207697505U - Vehicle collision protective device based on acceleration transducer - Google Patents
Vehicle collision protective device based on acceleration transducer Download PDFInfo
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- CN207697505U CN207697505U CN201721868487.0U CN201721868487U CN207697505U CN 207697505 U CN207697505 U CN 207697505U CN 201721868487 U CN201721868487 U CN 201721868487U CN 207697505 U CN207697505 U CN 207697505U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model discloses a kind of vehicle collision protective device based on acceleration transducer, including power supply, main control MCU, CAN communication circuit, acceleration sensor circuit and several acceleration metering circuits；Main control MCU is electrically connected with power supply, the ignition switch of vehicle, acceleration sensor circuit, each acceleration metering circuit and CAN communication circuit respectively, and CAN communication circuit is electrically connected with entire car controller and combination instrument respectively by CAN main lines.The utility model have when hazardous collision occurs, can quick-speed interruption fuel cell chemical reaction, avoid occur explode etc. secondary hazards；Has the characteristics that the detection function that metering circuit is offline and acceleration transducer is abnormal.
Description
Technical field
The utility model is related to technical field of vehicle safety, and prevention effect can be played to vehicle collision more particularly, to one kind
The vehicle collision protective device based on acceleration transducer.
Background technology
When existing vehicle is occurred compared with strong collision, air bag can be popped up, to protect the safety of driver and passenger.
When air bag refers to collision before occupant generates secondary collision, make the device of air bag expansion protection occupant.Safety
Auxiliary device of the air bag as the passenger restraint system of seat harness, is referred to as air bag system.Air bag system is
Integrated safety airbag module, sensing collision are formed from air bag and inflation mechanism (gas generator) and is sent out to air bag module
The collision sensor system for going out expansion instruction and the harness for transmitting the signal sent out by sensor are constituted.
But the protected mode of practical air bag, the generation of hazardous collision cannot be prejudged, it cannot to vehicle collision
Play prevention effect.
Invention content
The purpose of utility model of the utility model is to overcome deficiency in the prior art, and providing one kind can be to vehicle
The vehicle collision protective device based on acceleration transducer of prevention effect is played in collision.
To achieve the goals above, the utility model uses following technical scheme：
A kind of vehicle collision protective device based on acceleration transducer, including power supply, main control MCU, CAN communication circuit,
Acceleration sensor circuit and several acceleration metering circuits；Main control MCU respectively with power supply, vehicle ignition switch, accelerate
Sensor circuit, each acceleration metering circuit and the electrical connection of CAN communication circuit, CAN communication circuit is spent by CAN main lines to distinguish
It is electrically connected with entire car controller and combination instrument.
The hazardous collision that the utility model is mainly used in the new energy vehicle such as pure electric automobile, fuel cell car is detectd
It surveys, is made of 1 main control MCU and most 5 acceleration metering circuits.
It, can be according to behaviour such as the quick broken height pressure of specific vehicle, the reactions of interrupts fuel battery chemistries when hazardous collision occurs
Make, avoids that the secondary hazards such as explosion occur；With the detection function that metering circuit is offline and acceleration transducer is abnormal.
Preferably, acceleration sensor circuit includes acceleration transducer signals Acquisition Circuit, acceleration MCU and acceleration
Spend metering signal output circuit；If acceleration transducer signals Acquisition Circuit include acceleration sensor chip U17, capacitance C62 and
Dry resistance, acceleration sensor chip U17 are electrically connected with capacitance C62 and each resistance respectively.
Preferably, acceleration metering signal output apparatus is electrically connected with acceleration MCU and main control MCU respectively, acceleration
Metering signal output circuit includes acceleration MCU, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, triode
Q1 and triode Q3；The one end resistance R19, acceleration MCU and main control MCU are sequentially connected electrically, the resistance R19 other ends respectively with resistance
The one end R15 and the electrical connection of triode Q1 base stages, the resistance R15 other ends are electric with triode Q1 emitters and the one end resistance R18 respectively
Connection, the resistance R18 other ends are electrically connected with triode Q3 collectors, and triode Q1 collectors are electrically connected with the one end resistance R16, electricity
The resistance R16 other ends are electrically connected with triode Q3 base stages and the one end resistance R17 respectively, and the resistance R17 other ends emit with triode Q3
Pole is electrically connected.
Preferably, CAN communication circuit includes CAN transceiver U1, common mode inductance B1 and anti-static circuit, CAN transceiver
U1, common mode inductance B1 and anti-static circuit are sequentially connected electrically, and CAN transceiver U1 is electrically connected with main control MCU, anti-static circuit with
CAN main lines are electrically connected.
Preferably, anti-static circuit includes capacitance C1, capacitance C3 and integrated circuit PESD1CAN, integrated circuit
PESD1CAN is electrically connected with capacitance C1, capacitance C3, resistance R1 and CAN main line respectively.
Preferably, the model TJA1050 of CAN transceiver U1.
Preferably, the model MMA8452Q of acceleration sensor chip U17.
Therefore, the utility model has the advantages that：It, can be quick according to specific vehicle when hazardous collision occurs
The operations such as broken height pressure, the reaction of interrupts fuel battery chemistries, avoid that the secondary hazards such as explosion occur；It is offline and add with metering circuit
The detection function of velocity sensor exception.
Description of the drawings
Fig. 1 is a kind of functional block diagram of the utility model；
Fig. 2 is a kind of circuit diagram of the acceleration transducer signals Acquisition Circuit of the utility model；
Fig. 3 is a kind of circuit diagram of the acceleration metering signal output apparatus of the utility model；
Fig. 4 is a kind of circuit diagram of the CAN communication circuit of the utility model.
In figure：Power supply 1, main control MCU 2, CAN communication circuit 3, acceleration sensor circuit 4, CAN main lines 5, full-vehicle control
Device 6, combination instrument 7, acceleration transducer signals Acquisition Circuit 41, acceleration MCU 42, acceleration measure signal output apparatus
43。
Specific implementation mode
The utility model is further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1 is a kind of vehicle collision protective device based on acceleration transducer, including power supply 1,
Main control MCU 2, CAN communication circuit 3 and 5 acceleration sensor circuits 4；Igniting of the main control MCU respectively with power supply, vehicle is opened
Close, each acceleration sensor circuit and CAN communication circuit electrical connection, CAN communication circuit by CAN main lines 5 respectively with vehicle
Controller 6 and combination instrument 7 are electrically connected.
Main control MCU is waken up by battery often electricity power supply by key ON signals.Main control MCU measures circuit with vehicle acceleration
It is connected by three conducting wires, measuring circuit for vehicle acceleration provides power supply and Receiving collision signal.Main control MCU by by
The CAN network of CANL/CANH compositions is communicated with entire car controller and combination instrument.When collision reaches preset threshold value
When, collision signal by CAN network and is sent to CAN network by main control MCU occurs.Combination instrument receives packet parsing status indicator
And make liquid crystal display show and buzzer prompt.Entire car controller reception state message, when receiving collision warning according to specific vehicle
Type carries out that broken height pressure, control fuel pile is forced to interrupt the operations such as chemical reaction, to ensure vehicle driving safety.
As shown in Fig. 2, acceleration sensor circuit includes acceleration transducer signals Acquisition Circuit 41, acceleration MCU 42
Signal output apparatus 43 is measured with acceleration；Acceleration transducer signals Acquisition Circuit includes acceleration sensor chip U17, capacitance
C62 and 3 resistance, acceleration sensor chip U17 are electrically connected with capacitance C62 and each resistance respectively.Acceleration sensor in figure
The the 1st and the 4th pin of chip U17 is electrically connected with main control MCU.The model MMA8452Q of acceleration sensor chip U17
U17 is 3-axis acceleration sensor, measures circuit communication using I2C universal serial bus and vehicle acceleration, makes system
Hardware design greatly simplify, the volume of system reduce, reliability improve.It, can not be actively since I2C interface uses open-drain output
High level is exported, positive supply can only be connect by external pull-up resistor R4, R8 and be pulled to high level.
As shown in figure 3, acceleration metering signal output apparatus is electrically connected with acceleration MCU and main control MCU respectively, acceleration
Metering signal output circuit includes acceleration MCU, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, triode
Q1 and triode Q3；The one end resistance R19, acceleration MCU and main control MCU are sequentially connected electrically, the resistance R19 other ends respectively with resistance
The one end R15 and the electrical connection of triode Q1 base stages, the resistance R15 other ends are electric with triode Q1 emitters and the one end resistance R18 respectively
Connection, the resistance R18 other ends are electrically connected with triode Q3 collectors, and triode Q1 collectors are electrically connected with the one end resistance R16, electricity
The resistance R16 other ends are electrically connected with triode Q3 base stages and the one end resistance R17 respectively, and the resistance R17 other ends emit with triode Q3
Pole is electrically connected.In Fig. 3, GSensor_OUT is electrically connected with main control MCU.
R19 is current-limiting resistance, prevents base current excessive；R15 is pull down resistor, is ensured when input terminal open circuit at triode
In the state of cut-off.Then Q3 is connected for Q1 conductings, exports as high level；Then Q3 ends for Q1 cut-offs, exports as low level.MCU_PTL
For the pwm signal controlled by main control MCU.Output duty cycle is the pwm signal of a% under normal circumstances；Acceleration transducer is abnormal
When output duty cycle be b% pwm signal；The pwm signal that output duty cycle is c% when detecting collision and occurring；Work as detecting
When being continuously low level to signal wire, then judge sensor for the state of going offline.
As shown in figure 4, CAN communication circuit includes CAN transceiver U1, common mode inductance B1 and anti-static circuit, CAN transceiver
U1, common mode inductance B1 and anti-static circuit are sequentially connected electrically, and CAN transceiver U1 is electrically connected with main control MCU, anti-static circuit with
CAN main lines are electrically connected.
Anti-static circuit includes capacitance C1, capacitance C3 and integrated circuit PESD1CAN, integrated circuit PESD1CAN respectively with
Capacitance C1, capacitance C3, the electrical connection of resistance R1 and CAN main line.The model TJA1050 of CAN transceiver U1.
The course of work of the utility model is as follows：
Vehicle acceleration metering circuit constantly detects collision alarm by acceleration transducer.When a collision occurs, vehicle
Collision alarm is sent to main control MCU by acceleration metering circuit.State message is sent to CAN bus, combination instrument by main control MCU
Receive packet parsing status indicator and make liquid crystal display show and buzzer prompt.Entire car controller reception state message, receives and touches
When hitting alarm, the operations such as entire car controller carries out broken height pressure according to specific vehicle, interrupts fuel battery chemistries are reacted, to ensure vehicle
Traffic safety.
It should be understood that the present embodiment is merely to illustrate the utility model rather than limitation the scope of the utility model.In addition
It should be understood that after reading the content taught by the present invention, those skilled in the art can make the utility model various
Change or modification, these equivalent forms also fall within the scope of the appended claims of the present application.
Claims (7)
1. a kind of vehicle collision protective device based on acceleration transducer, characterized in that including power supply (1), main control MCU (2),
CAN communication circuit (3) and most 5 acceleration sensor circuits (4)；Main control MCU respectively with power supply, vehicle ignition switch,
Each acceleration sensor circuit and CAN communication circuit electrical connection, CAN communication circuit by CAN main lines (5) respectively with vehicle control
Device (6) processed and combination instrument (7) electrical connection.
2. the vehicle collision protective device according to claim 1 based on acceleration transducer, characterized in that acceleration passes
Sensor circuit includes acceleration transducer signals Acquisition Circuit (41), acceleration MCU (42) and acceleration metering signal output electricity
Road (43)；Acceleration transducer signals Acquisition Circuit includes acceleration sensor chip U17, capacitance C62 and several resistance, is accelerated
Sensor chip U17 is electrically connected with capacitance C62 and each resistance respectively.
3. the vehicle collision protective device according to claim 2 based on acceleration transducer, characterized in that accelerometer
Amount signal output apparatus is electrically connected with acceleration MCU and main control MCU respectively, and it includes acceleration that acceleration, which measures signal output apparatus,
MCU, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, triode Q1 and triode Q3；The one end resistance R19 adds
Speed MCU and main control MCU are sequentially connected electrically, and the resistance R19 other ends are electrically connected with the one end resistance R15 and triode Q1 base stages respectively
It connects, the resistance R15 other ends are electrically connected with triode Q1 emitters and the one end resistance R18 respectively, the resistance R18 other ends and triode
Q3 collectors are electrically connected, and triode Q1 collectors are electrically connected with the one end resistance R16, the resistance R16 other ends respectively with triode Q3
Base stage and the electrical connection of the one end resistance R17, the resistance R17 other ends are electrically connected with triode Q3 emitters.
4. the vehicle collision protective device according to claim 1 based on acceleration transducer, characterized in that CAN communication
Circuit includes CAN transceiver U1, common mode inductance B1 and anti-static circuit, CAN transceiver U1, common mode inductance B1 and anti-static circuit
It is sequentially connected electrically, CAN transceiver U1 is electrically connected with main control MCU, and anti-static circuit is electrically connected with CAN main lines.
5. the vehicle collision protective device according to claim 4 based on acceleration transducer, characterized in that antistatic electricity
Road includes capacitance C1, capacitance C3 and integrated circuit PESD1CAN, integrated circuit PESD1CAN respectively with capacitance C1, capacitance C3, electricity
Hinder the electrical connection of R1 and CAN main lines.
6. the vehicle collision protective device according to claim 4 based on acceleration transducer, characterized in that CAN is received and dispatched
The model TJA1050 of device U1.
7. the vehicle collision protective device according to claim 2 based on acceleration transducer, characterized in that accelerate sensing
The model MMA8452Q of device chip U17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721868487.0U CN207697505U (en) | 2017-12-27 | 2017-12-27 | Vehicle collision protective device based on acceleration transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721868487.0U CN207697505U (en) | 2017-12-27 | 2017-12-27 | Vehicle collision protective device based on acceleration transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207697505U true CN207697505U (en) | 2018-08-07 |
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ID=63029458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721868487.0U Active CN207697505U (en) | 2017-12-27 | 2017-12-27 | Vehicle collision protective device based on acceleration transducer |
Country Status (1)
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| CN (1) | CN207697505U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109204193A (en) * | 2018-10-12 | 2019-01-15 | 杭州小驹物联科技有限公司 | A kind of method and system of quick identification vehicle signal and parameter |
-
2017
- 2017-12-27 CN CN201721868487.0U patent/CN207697505U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109204193A (en) * | 2018-10-12 | 2019-01-15 | 杭州小驹物联科技有限公司 | A kind of method and system of quick identification vehicle signal and parameter |
| CN109204193B (en) * | 2018-10-12 | 2021-05-14 | 杭州小驹物联科技有限公司 | Method and system for quickly identifying automobile signals and parameters |
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| CP02 | Change in the address of a patent holder |
Address after: 321000 bailongqiao Linjiang Industrial Park, Wucheng District, Jinhua City, Zhejiang Province Patentee after: ZHEJIANG ZHONGKE ZHENGFANG ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 321000 no.589 Longtan Road, Wucheng District, Jinhua City, Zhejiang Province Patentee before: ZHEJIANG ZHONGKE ZHENGFANG ELECTRONIC TECHNOLOGY Co.,Ltd. |