CN201951385U - Safety airbag indicator light circuit with diagnosis function - Google Patents
Safety airbag indicator light circuit with diagnosis function Download PDFInfo
- Publication number
- CN201951385U CN201951385U CN2011200008132U CN201120000813U CN201951385U CN 201951385 U CN201951385 U CN 201951385U CN 2011200008132 U CN2011200008132 U CN 2011200008132U CN 201120000813 U CN201120000813 U CN 201120000813U CN 201951385 U CN201951385 U CN 201951385U
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- light
- emitting diode
- air bag
- diagnosis
- indicator light
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Abstract
The utility model discloses a safety airbag indicator light circuit with a diagnosis function, which aims at solving the technical problem in the prior art that the existing safety airbag indicator light circuit does not detect the disconnection state of an safety airbag, and provides a safety airbag indicator light circuit with the diagnosis function, comprising a safety airbag ECU, an ignition power supply, a light-emitting diode (LED), a current-limiting resistor and a diagnosis resistor, wherein the anode of the LED is connected with the ignition power supply, the cathode of the LED is connected with one end of the current-limiting resistor, the other end of the current-limiting resistor is respectively connected with the safety airbag ECU and the diagnosis resistor, and the other end of the diagnosis resistor is connected with a power supply.
Description
Technical field
The utility model relates to automotive field, relates in particular to a kind of drive circuit of indicator that is used for showing on the automobile instrument panel safety air bag coupled condition.
Background technology
Safety air bag is the important component part of automotive safety, and relevant air bag system structure and control thereof can be from open day being that March 30, publication number in 2005 are the 1600604A and the day for announcing to be that April 23, notification number in 2008 are to know the patent documentation such as CN201051317Y.The control logic of safety air bag indicator light circuit is to adopt the low level effective and efficient manner in traditional combination instrument, therefore indicator light circuit can only show the working condition after safety air bag connects, to safety air bag be disconnected be connected after high level state can not be distinguished and be detected.Yet the connection of guaranteeing safety air bag is the important assurance of driver safety.
Summary of the invention
The utility model mainly is to solve the technical matters that existing in prior technology safety air bag indicator light circuit does not detect the safety air bag not-connected status, and a kind of safety air bag indicator light circuit with diagnosis function is provided.
The utility model is mainly solved by following technical proposals at the prior art problem, a kind of safety air bag indicator light circuit with diagnosis function, comprise safety airbag ECU, priming supply, also comprise light-emitting diode, current-limiting resistance, diagnosis resistance, the anodal point of connection ignition source of described light-emitting diode, the light-emitting diode negative pole connects an end of current-limiting resistance, and the other end of current-limiting resistance is attachment security air bag ECU, diagnosis resistance respectively, and the other end of diagnosis resistance connects power ground.The control logic of traditional safety air bag indicator light circuit is the low level effective means, the safety air bag indicator light circuit control logic of this programme is the effective and unsettled effective and efficient manner of low level, behind the cut-in point ignition source, if safety airbag ECU output low level signal, priming supply is by light-emitting diode and current-limiting resistance and safety airbag ECU output/input end formation loop, and light-emitting diode is bright; When safety airbag ECU is not connected to circuit, priming supply constitutes the loop by light-emitting diode, current-limiting resistance, diagnosis resistance, power supply ground, light-emitting diode is bright, because the effect of diagnosis resistance, electric current when this moment, current in loop was than the safety airbag ECU output low level is little, the brightness of light-emitting diode is just low, therefore, safety airbag ECU output low level state can be connected with safety airbag ECU from light-emitting diode luminance and be distinguished; When safety air bag is in normal condition, safety airbag ECU output high level signal, making the light-emitting diode terminal voltage is zero, light-emitting diode does not work.
As preferably, also comprise the protection diode, the protection diode is serially connected between described light-emitting diode and the priming supply, and the protection diode cathode connects the light-emitting diode positive pole, protection diode cathode point of connection ignition source.The protection diode can prevent from when in a single day the output voltage of safety airbag ECU is higher than priming supply voltage deleterious current to take place and damage ECU.
As preferably, protect diode by ignition lock point of connection ignition source.Make priming supply after igniting, be connected to circuit of LED, to be fit to light-emitting diode as the use habit of safety air bag indicator lamp on gauge panel.
As preferably, also comprise shunt resistance, shunt resistance is in parallel with light-emitting diode.For preventing that overcurrent from appearring in light-emitting diode, light-emitting diode is carried out divided current by the shunt resistance of selecting suitable resistance.
As preferably, light-emitting diode is coloured light-emitting diode.The visible light colors of light-emitting diode is selected as required.
The beneficial effect that the utility model brings is, can effectively detect the off line state of safety air bag, in time reminds driver and crew's trouble-shooting, improves vehicle safety; Circuit is succinct, easy for installation, with low cost.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model;
Fig. 2 is a preferred schematic diagram of the present utility model.
Among the figure: D1 is a light-emitting diode, and D2 is the protection diode, and R1 is a shunt diode, and R2 is the current limliting diode, and R3 is a diagnosis resistance.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment: as shown in Figure 1, a kind of safety air bag indicator light circuit with diagnosis function, comprise safety airbag ECU, priming supply, also comprise light-emitting diode D1, current-limiting resistance R2, diagnosis resistance R 3, the anodal point of connection ignition source of light-emitting diode D1, light-emitting diode D1 negative pole connects the end of current-limiting resistance R2, and the other end of current-limiting resistance R2 is attachment security air bag ECU, diagnosis resistance R 3 respectively, and the other end of diagnosis resistance R 3 connects power ground.When safety air bag connected, priming supply, D1, R2, safety airbag ECU output/input end constituted current return, and during the safety airbag ECU outgoing level, D1 is bright; When safety air bag did not connect, priming supply, D1, R2, R3, ground wire constituted current return, and D1 is bright.
As shown in Figure 2, it is preferred schematic diagram of the present utility model, shunt resistance R1 is in parallel with light-emitting diode D1, makes the D1 maximum current limit in allowed band, also makes current-limiting resistance R2 resistance that big choice is arranged when carrying out the dividing potential drop apolegamy with diagnosis resistance R 3 simultaneously; The access of ignition lock conducting contact is more suitable for light-emitting diode D1 as the use habit of indicator lamp on gauge panel, and promptly the vehicle ignition rear indicator light is started working.
So the utlity model has the off line state that can effectively detect safety air bag, in time remind driver and crew's trouble-shooting, improve features such as vehicle safety and circuit be succinct, easy for installation, with low cost.
Claims (5)
1. safety air bag indicator light circuit with diagnosis function, comprise safety airbag ECU, priming supply, it is characterized in that: also comprise light-emitting diode, current-limiting resistance, diagnosis resistance, the anodal point of connection ignition source of described light-emitting diode, the light-emitting diode negative pole connects an end of current-limiting resistance, the other end of current-limiting resistance is attachment security air bag ECU, diagnosis resistance respectively, and the other end of diagnosis resistance connects power ground.
2. according to the described safety air bag indicator light circuit of claim 1 with diagnosis function; it is characterized in that: also comprise the protection diode; described protection diode is serially connected between described light-emitting diode and the priming supply; described protection diode cathode connects the light-emitting diode positive pole, protection diode cathode point of connection ignition source.
3. according to claim 1 or 2 described safety air bag indicator light circuits with diagnosis function, it is characterized in that: described protection diode is by ignition lock point of connection ignition source.
4. according to the described safety air bag indicator light circuit with diagnosis function of claim 1, it is characterized in that: also comprise shunt resistance, described shunt resistance is in parallel with light-emitting diode.
5. according to the described safety air bag indicator light circuit with diagnosis function of claim 1, it is characterized in that: described light-emitting diode is coloured light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200008132U CN201951385U (en) | 2011-01-04 | 2011-01-04 | Safety airbag indicator light circuit with diagnosis function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200008132U CN201951385U (en) | 2011-01-04 | 2011-01-04 | Safety airbag indicator light circuit with diagnosis function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201951385U true CN201951385U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200008132U Expired - Fee Related CN201951385U (en) | 2011-01-04 | 2011-01-04 | Safety airbag indicator light circuit with diagnosis function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201951385U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472407A (en) * | 2013-09-23 | 2013-12-25 | 迈普通信技术股份有限公司 | Dual-power state detection circuit, power supply system and dual-power state detection method |
| CN104228737A (en) * | 2013-06-18 | 2014-12-24 | 沃尔沃汽车公司 | Arrangement, vehicle and method for control of vehicle-airbag-status display |
-
2011
- 2011-01-04 CN CN2011200008132U patent/CN201951385U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104228737A (en) * | 2013-06-18 | 2014-12-24 | 沃尔沃汽车公司 | Arrangement, vehicle and method for control of vehicle-airbag-status display |
| CN104228737B (en) * | 2013-06-18 | 2019-02-19 | 沃尔沃汽车公司 | For controlling equipment, vehicle and the method for vehicle airbag status display |
| CN103472407A (en) * | 2013-09-23 | 2013-12-25 | 迈普通信技术股份有限公司 | Dual-power state detection circuit, power supply system and dual-power state detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Taizhou City, Zhejiang Province, 317000 coastal city east gate head Co-patentee after: Zhejiang Geely Holding Group Co., Ltd. Patentee after: Zhejiang Geely Automobile Research Institute Co., Ltd. Address before: 311228, No. 188, Century Avenue, Linjiang Industrial Park, Xiaoshan District, Zhejiang, Hangzhou Co-patentee before: Zhejiang Geely Holding Group Co., Ltd. Patentee before: Zhejiang Geely Automobile Research Institute Co., Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Plateau, Chengdu auto industry company limited Assignor: Zhejiang Geely Automobile Research Institute Co., Ltd., Zhejiang Geely Holding Group Company Limited Contract record no.: 2012330000037 Denomination of utility model: Safety airbag indicator light circuit with diagnosis function Granted publication date: 20110831 License type: Exclusive License Record date: 20120229 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20140104 |