CN101148163A - Automobile safety airbag control ignition energy storing and discharging equipment - Google Patents
Automobile safety airbag control ignition energy storing and discharging equipment Download PDFInfo
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- CN101148163A CN101148163A CNA200610116142XA CN200610116142A CN101148163A CN 101148163 A CN101148163 A CN 101148163A CN A200610116142X A CNA200610116142X A CN A200610116142XA CN 200610116142 A CN200610116142 A CN 200610116142A CN 101148163 A CN101148163 A CN 101148163A
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Abstract
The energy storing and discharge device for controlling the ignition of safety air bag in automobile consists of resistors, diodes, transistors, electrolytic capacitors and one monolithic computer, and is powered with one 12 V power source. It has one multistage discharge circuit to discharge electricity and can avoid malfunction in the condition of element damage. The present invention has high reliability and low cost.
Description
Technical Field
The invention relates to storage and discharge equipment for controlling ignition energy of an automobile safety airbag, and belongs to the technical field of automobile safety airbags.
Background
In an automobile, an air bag protects members and detonates normally when the automobile is in serious collision, but when the automobile is not in serious collision, the air bag is exploded, and the air bag is exploded by mistake. The automobile safety air bag controller is a device which can make collision judgment when an automobile collides and provide ignition energy for an air generator, and is called an air bag controller for short. The electric igniter for the automobile safety air bag is installed in a gas generator of the automobile safety air bag, and can be instantly detonated when being excited by a certain amount of electric energy, so that the effect of igniting the medicament in the gas generator is achieved, and the electric igniter is called as an igniter for short. An automobile safety airbag gas generator is a device for filling gas into an airbag of a safety airbag when an airbag controller sends ignition energy, and is called a gas generator for short.
The energy is stored through a capacitor, the capacitor supplies energy to an integrated chip, ignition energy is supplied through the chip, and the capacitor energy is not released. And energy can only be stored for a short time, the release of energy being relatively slow in case of failure of all relevant components.
Disclosure of Invention
The invention aims to provide energy storage when an air bag controller provides ignition energy for a gas generator and energy storage and discharge equipment for controlling the ignition energy of an automobile air bag, which prevents the air bag from being mistakenly exploded due to energy release when other modules fail.
In order to achieve the above purpose, the technical scheme of the invention is to provide a storage and discharge device for controlling ignition energy of an automobile air bag, which is characterized by comprising resistors R3, R19, R20, R33, R35, R45, R47, R49, R53, diodes D1, D3, D13, triodes A1, A8 and A13, electrolytic capacitors C24, C25 and C27 and a singlechip AD, wherein a 12V power supply is connected with one end of the resistor R45, the other end of the resistor R45 is respectively connected with the anode of a diode D1 and the anode of a diode D3, the cathode of the diode D1 is connected with the collector of the triode A8, the base of the triode A8 is connected with one end of the resistor R33, the other end of the resistor R33 is respectively connected with one end of a port PT7 and a resistor R19 of the singlechip AD, the other end of the resistor R19 is connected with a 12V power supply, the emitter of the triode A8 is grounded, the negative electrode of the diode D3 is respectively connected with one end of a resistor R47, one end of a resistor R20, one end of a resistor R49, the positive electrode of an electrolytic capacitor C24, the positive electrode of an electrolytic capacitor C27 and the positive electrode of a diode D13, the negative electrode of the electrolytic capacitor 24 is grounded, the negative electrode of the electrolytic capacitor C27 is grounded, the other end of the resistor R47 is respectively connected with one ends of a singlechip AD port PT8 and a resistor R35, the other end of the resistor R35 is connected with a base electrode of a triode A13, a collector electrode of the triode A13 is respectively connected with the other end of the resistor R20 and a collector electrode of a triode A1, the base electrode of the triode A1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the singlechip AD port PT8, an emitter electrode of the triode A1 is grounded, an emitter electrode of the triode A13 is grounded, the other end of the resistor R49 is respectively connected with one end of the capacitor C25, an ATOD7 port collected by the singlechip and one end of a resistor R53, the other end of the capacitor C25 is grounded, the other end of the resistor R53 is grounded, and the negative electrode of the diode D13 is an ignition energy output end of the diode D13.
The invention adopts a 12V power supply to be connected with a resistor and then connected with a diode to charge two capacitors, the triodes A1 and A13 and the resistors R3, R47, R35 and R20 form a multi-pole discharge circuit, the stored electric quantity can be discharged through the multi-pole discharge circuit, whether the discharge is performed or not is controlled by a switch circuit built by the triodes controlled by a single chip microcomputer, and the automatic discharge can be performed under the condition that the single chip microcomputer fails.
The single chip microcomputer can complete the charging and discharging processes only by controlling the two pins, and the discharging process can be completed by the characteristics of the circuit of the single chip microcomputer without depending on the control of the single chip microcomputer.
The invention has the advantages of improved ignition reliability and non-ignition reliability of the air bag controller and low cost.
Drawings
Fig. 1 is a schematic diagram of a storage and discharge device for controlling ignition energy of an automobile airbag.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the drawings.
Examples
As shown in fig. 1, the schematic diagram of the device for storing and discharging the control ignition energy of the airbag of the automobile is shown, and the device for storing and discharging the control ignition energy of the airbag of the automobile is composed of resistors R3, R19, R20, R33, R35, R45, R47, R49, R53, diodes D1, D3, D13, triodes A1, A8, a13, electrolytic capacitors C24, C25, C27 and a single chip microcomputer AD.
The resistor R45 is 1K, the diode D1 is 1N4148, the diode D3 is 1N4148, the triode A8 is 2N4401, the resistor R33 is 2K, the resistor R19 is 10K, the resistor R47 is 27K, the resistor R20 is 22 omega, the resistor R49 is 30K, the electrolytic capacitor C24 is 2200 muF, the electrolytic capacitor C27 is 2200 muF, the diode D13 is 1N4148, the resistor R35 is 1K, the triode A13 is 2N4401, the triode A1 is 2N4401, the resistor R3 is 2K, the capacitor C25 is 0.01 muF, and the resistor R53 is 15K.
The 12V power supply is connected with one end of a resistor R45, the other end of the resistor R45 is respectively connected with the anodes of a diode D1 and a diode D3, the cathode of the diode D1 is connected with the collector of a triode A8, the base of the triode A8 is connected with one end of a resistor R33, the other end of the resistor R33 is respectively connected with one end of a singlechip AD port PT7 and one end of a resistor R19, the other end of the resistor R19 is connected with the 12V power supply, the emitter of the triode A8 is grounded, the cathode of the diode D3 is respectively connected with one end of a resistor R47, one end of a resistor R20, one end of a resistor R49, the anode of an electrolytic capacitor C24, the anode of an electrolytic capacitor C27, the anode of a diode D13, the cathode of the electrolytic capacitor 24 is grounded, and the cathode of the electrolytic capacitor C27 is grounded, the other end of the resistor R47 is connected with one end of a singlechip AD port PT8 and one end of a resistor R35 respectively, the other end of the resistor R35 is connected with a base electrode of a triode A13, a collector electrode of the triode A13 is connected with the other end of the resistor R20 and a collector electrode of the triode A1 respectively, the base electrode of the triode A1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the singlechip AD port PT8, an emitter electrode of the triode A1 is grounded, an emitter electrode of the triode A13 is grounded, the other end of the resistor R49 is connected with one end of a capacitor C25 respectively, an ATOD7 port is collected by the singlechip AD, one end of a resistor R53, the other end of the capacitor C25 is grounded, the other end of the resistor R53 is grounded, and the negative electrode of a diode D13 is an ignition energy output end.
1. Charging process
When the port of the single chip microcomputer PT7 is at a low level and the port of the single chip microcomputer PT8 is at a low level, a 12V power supply can pass through R45, D3, R49 and R53, wherein a series circuit of the R49 and the R53 and a circuit formed by combining the R47 in parallel charge capacitors C27 and C24
Wherein 0.7V is the voltage drop of diode D3
Because one end of the resistor R19 is connected with a 12V power supply, the other end of the resistor R19 is respectively connected with one ends of the PT7 and the R33, the port of the singlechip PT7 is at a low level, the other port of the resistor R33 is at a low level, the base electrode of the triode A8 is at a low level, the triode A8 cannot be conducted, and the diode D1 has no current.
The port of the single chip microcomputer PT87 is at a low level, and similarly, the transistor A1 cannot be turned on, and the transistor a13 cannot be turned on, so that the current flows to the series-parallel circuit formed by the resistors R47, R49, and R53 through the resistor R45 and the diode D3, the voltage of the series-parallel circuit formed by the resistors R47, R49, and R53 is 10.67V, the series-parallel circuit formed by the resistors R47, R49, and R53 is connected in parallel with the electrolytic capacitors C24 and C27, so that the voltage across the electrolytic capacitors C24 and C27 is also 10.67V, and the final charging capacity of the electrolytic capacitors C24 and C27 is =10.67V × (0 220uf 2200uf) =46.95 bank.
The 2 nd end of the resistor R49 and one end of the resistor R53 are connected with an AD acquisition port ATOD7 of the single chip microcomputer, the single chip microcomputer can detect the voltages at the two ends of the resistor R53 through acquiring the voltage at the port ATOD7, and whether the voltages at the two ends of the resistor C24 and the resistor C27 are normal or not can be known through calculation.
2. Discharge process
When the single chip microcomputer detects that other components have faults, in order to prevent the electric quantity stored in the electrolytic capacitors C24 and C27 from leaking out and leading the gas generator to act, the air bags are mistakenly exploded, the electric quantity stored in the electrolytic capacitors C24 and C27 must be discharged.
1. Normal discharge of electricity
The pin of the single chip microcomputer PT7 outputs high level, an emitting electrode and a collecting electrode of the triode A8 are conducted, a 12V power supply is grounded through the resistor R45, the diode D1 and the triode A8, and current does not pass through the D3.
The pin of the singlechip PT8 outputs high level,
the emitter and the collector of the triode A1 are conducted, and the electric quantity stored by the electrolytic capacitors C24 and C27 is discharged through the resistor R20 and the triode A1 in a grounding mode.
The emitter and the collector of the triode A13 are conducted, and the electric quantity stored by the electrolytic capacitors C24 and C27 is discharged through the resistor R20 and the triode A1 in a grounding mode.
The series circuit of the 30K resistor R49 and the 15K resistor R53 is much larger than R20 (22 Ω) at 45K and is not a discharge circuit.
2. Discharging in case of partial component damage
(1) Discharge process in case of damage to transistor A1
When the triode A1 is damaged, the electric quantity stored in the capacitors C24 and C27 can be conducted by the emitter and the collector of the triode a13 when the single chip PT8 is at a high level, the 12V power supply is grounded through the resistor R45, the diodes D3 and R20 and the triode a13, the power supply does not charge the capacitors C24 and C27, and the electric quantity stored in the capacitors C24 and C27 can be discharged through the resistors R20 and a 13.
(2) Discharge process in case of damage of transistor a13
Similarly, in the case of damage to the transistor a13, the 12V power supply is grounded through the resistor R45, the diodes D3 and R20, and the transistor a13, so that the power supply does not charge the C24 and C27, and the stored power of the C24 and C27 can be discharged through the resistor R20 and the transistor A1.
(3) Discharging process under condition of damaged PT8 pin of single chip microcomputer
When the pin of the singlechip PT8 is damaged, the base electrode of the triode A13 is connected with the cathode of the high-level diode D3 through the resistors R35 and R47, the triode A13 is conducted, and the 12V power supply is grounded through the resistor R45, the diodes D3 and R20 and the triode A13, so that the power supply does not charge the C24 and C27, and the electric quantity stored by the C24 and C27 can be discharged through the R20 and A13.
(4) Discharging process under condition of damaged PT7 port of single chip microcomputer
When the port of the single chip microcomputer PT7 is damaged, the base electrode of the triode A8 is connected with the power supply 12V through the resistors R33 and R19, the emitting electrode and the collector electrode of the triode A8 are conducted, the 12V power supply is grounded through the resistor R45 and the diode D1, and the electric quantity stored by the capacitors C24 and C27 is automatically discharged.
Therefore, under the condition that the single chip microcomputer does not work or is damaged, the electric quantity stored by the C24 and the C27 is automatically discharged, and under the condition that the A1 or the A13 is damaged, the purpose of discharging can be achieved through the management of the single chip microcomputer, and the airbag can not be mistakenly exploded.
Claims (1)
1. The storage and discharge equipment for controlling ignition energy of the automobile airbag is characterized by comprising resistors R3, R19, R20, R33, R35, R45, R47, R49, R53, diodes D1, D3, D13, triodes A1, A8, A13, electrolytic capacitors C24, C25, C27 and a singlechip AD, wherein a 12V power supply is connected with one end of the resistor R45, the other end of the resistor R45 is respectively connected with the anodes of the diode D1 and the diode D3, the cathode of the diode D1 is connected with the collector of the triode A8, the base of the triode A8 is connected with one end of the resistor R33, the other end of the resistor R33 is respectively connected with one ends of a port PT7 and a resistor R19 of the singlechip AD, the other end of the resistor R19 is connected with the 12V power supply, the emitter of the triode A8 is grounded, the cathode of the diode D3 is respectively connected with one end of the resistor R47, one end of the resistor R20, one end of the resistor R49, the anode of the electrolytic capacitor C24, the anode of the electrolytic capacitor C27 and the anode of the diode D13, the negative electrode of the electrolytic capacitor 24 is grounded, the negative electrode of the electrolytic capacitor C27 is grounded, the other end of the resistor R47 is connected with one end of a singlechip AD port PT8 and one end of a resistor R35 respectively, the other end of the resistor R35 is connected with the base electrode of a triode A13, the collector electrode of the triode A13 is connected with the other end of a resistor R20 and the collector electrode of a triode A1 respectively, the base electrode of the triode A1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the singlechip AD port PT8, the emitter electrode of the triode A1 is grounded, the emitter electrode of the triode A13 is grounded, the other end of the resistor R49 is connected with one end of a capacitor C25 respectively, the port of a singlechip AD acquisition ATOD7 and one end of a resistor R53, the other end of the capacitor C25 is grounded, the other end of the resistor R53 is grounded, and the negative electrode of a diode D13 is an ignition energy output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610116142XA CN101148163A (en) | 2006-09-18 | 2006-09-18 | Automobile safety airbag control ignition energy storing and discharging equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610116142XA CN101148163A (en) | 2006-09-18 | 2006-09-18 | Automobile safety airbag control ignition energy storing and discharging equipment |
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| CN101148163A true CN101148163A (en) | 2008-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200610116142XA Pending CN101148163A (en) | 2006-09-18 | 2006-09-18 | Automobile safety airbag control ignition energy storing and discharging equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102076532A (en) * | 2008-07-03 | 2011-05-25 | 罗伯特·博世有限公司 | Device for triggering all air bags of vehicle, control unit for generating trigger signal for all air bags of vehicle, and system comprising said device and said control unit |
| CN108680068A (en) * | 2018-07-20 | 2018-10-19 | 航天科工仿真技术有限责任公司 | A kind of firing circuit with energy-storage function |
| CN108734914A (en) * | 2018-07-20 | 2018-11-02 | 航天科工仿真技术有限责任公司 | A kind of detection bullet with fire behavior investigation function that unmanned plane carries |
| CN108860608A (en) * | 2018-07-20 | 2018-11-23 | 航天科工仿真技术有限责任公司 | A kind of high-rise building rescue system based on unmanned plane |
-
2006
- 2006-09-18 CN CNA200610116142XA patent/CN101148163A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102076532A (en) * | 2008-07-03 | 2011-05-25 | 罗伯特·博世有限公司 | Device for triggering all air bags of vehicle, control unit for generating trigger signal for all air bags of vehicle, and system comprising said device and said control unit |
| CN102076532B (en) * | 2008-07-03 | 2014-06-25 | 罗伯特·博世有限公司 | Device for triggering all air bags of vehicle, control unit for generating trigger signal for all air bags of vehicle, and system comprising said device and said control unit |
| CN108680068A (en) * | 2018-07-20 | 2018-10-19 | 航天科工仿真技术有限责任公司 | A kind of firing circuit with energy-storage function |
| CN108734914A (en) * | 2018-07-20 | 2018-11-02 | 航天科工仿真技术有限责任公司 | A kind of detection bullet with fire behavior investigation function that unmanned plane carries |
| CN108860608A (en) * | 2018-07-20 | 2018-11-23 | 航天科工仿真技术有限责任公司 | A kind of high-rise building rescue system based on unmanned plane |
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Open date: 20080326 |