CN106523241A - Detection circuit of retrofiring state of automobile - Google Patents
Detection circuit of retrofiring state of automobile Download PDFInfo
- Publication number
- CN106523241A CN106523241A CN201611182324.7A CN201611182324A CN106523241A CN 106523241 A CN106523241 A CN 106523241A CN 201611182324 A CN201611182324 A CN 201611182324A CN 106523241 A CN106523241 A CN 106523241A
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- CN
- China
- Prior art keywords
- triode
- audion
- automobile
- detection circuit
- resistor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The invention discloses a detection circuit of the retrofiring state of an automobile. The detection circuit comprises a left loop and a right loop, wherein the left loop and the right loop are connected in sequence; the left loop comprises a first triode and a diode, a base electrode of the first triode is connected to an automobile power supply VCC by virtue of a first resistor, a collecting electrode of the first triode is grounded by virtue of a second resistor, an emitting electrode of the first triode is grounded by virtue of a first capacitor and a second capacitor which are connected in parallel, an anode of the diode is connected with the automobile power supply VCC, and a cathode of the diode is connected with the emitting electrode of the first triode; and the right loop comprises a second triode, a base electrode of the second triode is connected with the collecting electrode of the first triode by virtue of a third resistor, the emitting electrode of the second triode is grounded, a collecting electrode of the second triode is connected with a high level VDD by virtue of a fourth resistor, and the collecting electrode of the second triode is used as detection output. The detection circuit of the retrofiring state of the automobile has the advantages of simplicity, stability, reliability, low cost of devices and easiness in implementation and has high application and popularization values in electrical systems of automobile electronic equipment.
Description
Technical field
The present invention relates to automobile power source, more particularly to a kind of detection circuit of automotive ignition launch state.
Background technology
With the high speed development of automobile industry, the intelligence degree more and more higher of automobile.It is simultaneously vehicle-mounted and normal using automobile
Electricity（Directly from vehicular power-bottle power taking）The IED of power supply is also more and more, is easily caused that vehicular power-bottle is under-voltage, receives
Damage even vehicle and be unable to normal ignition startup.In order to avoid such situation occurs, it is desirable to set using the electronics of automobile often electricity power supply
For when automobile does not start, low-power consumption or park mode can be in.When automotive ignition starts, these are in low-power consumption or dormancy
Equipment can recover rapidly normal working condition.If automotive ignition launch state judges not accurate enough and reliable, can lead
Cause associated electronic device be waken up in time and recover normal working condition.And then information of vehicles can be obtained very to driver
Safety traffic to vehicle is adversely affected.
The content of the invention
The present invention seeks to：A kind of detection circuit of automotive ignition launch state is provided, during based on automotive ignition, by right
The detection of automobile ACC states is further accurately and reliably judged to automotive ignition launch state, so that needing in automobile point
The electronic equipment resumed work when fire starts can be resumed work state in time, provide for driver and timely service.
The technical scheme is that：
A kind of detection circuit of automotive ignition launch state, including the left loop and right loop that are sequentially connected；
The left loop includes the first audion, first resistor, second resistance, the second electric capacity, the first electric capacity and diode, its
In the first audion base stage by first resistor be connected to automobile power source VCC, colelctor electrode by second resistance ground connection, emitter stage
The first electric capacity in parallel, the second capacity earth, the diode anode connection automobile power source VCC, negative electrode connection the one or three
The emitter stage of pole pipe；
The right loop includes the second audion, 3rd resistor and the 4th resistance, wherein the base stage of the second audion is by the
Three resistance connect the colelctor electrode of the first audion, grounded emitter, colelctor electrode and connect high level VDD by the 4th resistance, and second
The colelctor electrode of audion is used as detection output.
Preferably, the automobile power source VCC is 12V or 24V.
Preferably, first audion is PNP type triode, and the second audion is NPN type triode.
It is an advantage of the invention that：
The detection circuit of the automotive ignition launch state that the present invention is provided, circuit are very simple, stable, reliable, and device cost is low,
It is easily achieved.There is very high application and promotional value in the circuit system of vehicle electronics.
Description of the drawings
Schematic diagrams of the Fig. 1 for the detection circuit of the automotive ignition launch state of the embodiment of the present invention.
Specific embodiment
Present disclosure can be known more about and implemented according to this for convenience of those skilled in the art, below by accompanying drawing and
Embodiment is further explained to the present invention, for explaining the present invention, but does not constitute the restriction of the present invention.
As shown in figure 1, this circuit can be tried out detect in 24V and 12V system automobile power supplys ACC simultaneously.Under normal condition,
ACC_Detect voltages are equal to high level VDD（VDD is generally 3.3V or 5V for the power supply of MCU）.First electric capacity C1 and
The capacitance of two electric capacity C2 selects to need according to its discharge time to determine.Second audion Q2 plays a part of to switch and isolates,
MCU minimum systems can be made well to exempt from the interference from ACC.
When automobile key connects ACC, ACC input terminal voltages can be 12V or 24V, by diode D1（Here select
Select the silicone tube that pressure drop is about 0.7V）Charge to the first electric capacity C1 and the second electric capacity C2, so that the first electric capacity after charging complete
The voltage at C1 and the second electric capacity C2 two ends is 11.3V（It is 23.3V for 24V systems）Left and right.Moment of the automobile in igniting, need
One heavy current, now ACC inputs produce and pressure drop or stop power supply, persistent period about 500ms（Actual measurement）.Treat that automotive ignition is tied
Shu Hou, recovers normal voltage.
During automotive ignition, the first electric capacity C1 first and the second electric capacity C2（The two now charging complete）With ACC
Input produces voltage difference and is assumed to be U1 (transient voltage is close to 11.3V or 23.3V).Diode D1 has unilateral conduction, instead
To impedance be approximately infinity equivalent to open-circuit condition, U1 is carried in the first audion Q1（PNP type triode）Emitter stage
And VCC inputs between, make the first audion Q1 saturation conductions and its saturation conduction voltage is about 0.4V.Now second resistance R2
The voltage at two ends is about 11.3-0.4 ≈ 10.9V (24V systems are 23.3-0.4 ≈ 22.9V), and the voltage-drop loading is in 3rd resistor
R3 and the second audion Q2 emitter stages, make the second audion Q2 saturation conductions and colelctor electrode are changed into low level from high level.Simultaneously
ACC_Detect is also changed into low level from high level, which is monitored by the GPIO of MCU.And then judge whether automobile is carried out
Retrofire, reaches purpose that is accurate, reliable and waking up the electronic equipment for being in low-power consumption or sleep pattern in time.
Above-described embodiment technology design only to illustrate the invention and feature, its object is to allow person skilled in the art
Will appreciate that present disclosure and implement according to this, can not be limited the scope of the invention with this.It is all main according to the present invention
The modification for wanting the spirit of technical scheme to be done, should all be included within the scope of the present invention.
Claims (3)
1. a kind of detection circuit of automotive ignition launch state, it is characterised in that：Including the left loop and right side that are sequentially connected
Loop；
The left loop includes the first audion, first resistor, second resistance, the second electric capacity, the first electric capacity and diode, its
In the first audion base stage by first resistor be connected to automobile power source VCC, colelctor electrode by second resistance ground connection, emitter stage
The first electric capacity in parallel, the second capacity earth, the diode anode connection automobile power source VCC, negative electrode connection the one or three
The emitter stage of pole pipe；
The right loop includes the second audion, 3rd resistor and the 4th resistance, wherein the base stage of the second audion is by the
Three resistance connect the colelctor electrode of the first audion, grounded emitter, colelctor electrode and connect high level VDD by the 4th resistance, and second
The colelctor electrode of audion is used as detection output.
2. the detection circuit of automotive ignition launch state according to claim 1, it is characterised in that：The automobile power source
VCC is 12V or 24V.
3. the detection circuit of automotive ignition launch state according to claim 1, it is characterised in that：First audion
For PNP type triode, the second audion is NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182324.7A CN106523241A (en) | 2016-12-20 | 2016-12-20 | Detection circuit of retrofiring state of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182324.7A CN106523241A (en) | 2016-12-20 | 2016-12-20 | Detection circuit of retrofiring state of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106523241A true CN106523241A (en) | 2017-03-22 |
Family
ID=58341114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611182324.7A Pending CN106523241A (en) | 2016-12-20 | 2016-12-20 | Detection circuit of retrofiring state of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106523241A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109080408A (en) * | 2018-08-28 | 2018-12-25 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle-mounted air-conditioning ventilation door circuit for controlling motor and its control method |
| CN110254379A (en) * | 2019-07-09 | 2019-09-20 | 四川朗勃科技有限公司 | Automobile multimedia device, which does not power off, does not restart circuit main board |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203151454U (en) * | 2013-01-21 | 2013-08-21 | 东莞联洲电子科技有限公司 | Vehicle-borne ACC delay shutdown circuit |
| CN204086374U (en) * | 2014-09-30 | 2015-01-07 | 安徽建筑大学 | A kind of automobile ACC signal deteching circuit |
| CN206309521U (en) * | 2016-12-20 | 2017-07-07 | 清华大学苏州汽车研究院（吴江） | A kind of detection circuit of automotive ignition launch state |
-
2016
- 2016-12-20 CN CN201611182324.7A patent/CN106523241A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203151454U (en) * | 2013-01-21 | 2013-08-21 | 东莞联洲电子科技有限公司 | Vehicle-borne ACC delay shutdown circuit |
| CN204086374U (en) * | 2014-09-30 | 2015-01-07 | 安徽建筑大学 | A kind of automobile ACC signal deteching circuit |
| CN206309521U (en) * | 2016-12-20 | 2017-07-07 | 清华大学苏州汽车研究院（吴江） | A kind of detection circuit of automotive ignition launch state |
Non-Patent Citations (1)
| Title |
|---|
| （美）S.S.巴塞著，罗耀光编译: "《半导体脉冲与开关电路》", 30 June 1985, 北京：人民邮电出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109080408A (en) * | 2018-08-28 | 2018-12-25 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle-mounted air-conditioning ventilation door circuit for controlling motor and its control method |
| CN110254379A (en) * | 2019-07-09 | 2019-09-20 | 四川朗勃科技有限公司 | Automobile multimedia device, which does not power off, does not restart circuit main board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170322 |