CN204086374U - A kind of automobile ACC signal deteching circuit - Google Patents
A kind of automobile ACC signal deteching circuit Download PDFInfo
- Publication number
- CN204086374U CN204086374U CN201420599092.5U CN201420599092U CN204086374U CN 204086374 U CN204086374 U CN 204086374U CN 201420599092 U CN201420599092 U CN 201420599092U CN 204086374 U CN204086374 U CN 204086374U
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- China
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- resistance
- electric capacity
- stabilivolt
- triode
- acc
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Abstract
The utility model relates to, a kind of automobile ACC signal deteching circuit, be made up of stabilivolt Z, resistance R, electric capacity C, triode Q, left loop is made up of the first resistance R1, the second resistance R2, the first electric capacity C1, wherein the first resistance R1, the second resistance R2 and the first electric capacity C1 are for connecting, its first resistance R1 loong shunt one first triode Q1, the first electric capacity C1 loong shunt 1 the 3rd resistance R3; Right loop is made up of the first stabilivolt Z1, the second stabilivolt Z2, the 4th resistance R4, the 5th resistance R5 and the 4th electric capacity C4, its first stabilivolt Z1, the second stabilivolt Z2, the 4th resistance R4, the 5th resistance R5 and the 4th electric capacity C4 form series loop, its the 5th resistance R5 loong shunt one second electric capacity C2, one the 3rd electric capacity C3, the beneficial effects of the utility model are: circuit is simple, reliably, be easy to realize.There is certain application and promotional value.
Description
Technical field
The utility model relates to a kind of automobile ACC testing circuit, the power-supply system enabling this testing circuit adapt to 12V or 24V to power by simple short circuit or breaking resistor.
Background technology
In automobile, ACC refers to before automobile does not also start, if there are key ACC shelves, as long as key is pushed this position, the equipment that some electricity consumptions are not too large, such as: radio, cigar lighter etc. have just been energized, when automotive ignition time, need a heavy current, at this moment ACC stops power supply, and waits automotive ignition to terminate, and starts again power supply.Just because of automotive ignition needs a heavy current, interference is comparatively large, if the irrational words of ACC measurement circuit design, associated system MCU can be caused to reset.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of widely used, is applied in the testing circuit on automobile ACC.
Technical characteristics of the present utility model is: be made up of stabilivolt, resistance, electric capacity, triode, left loop is made up of the first resistance, the second resistance, the first electric capacity, wherein the first resistance, the second resistance with the first electric capacity for connecting, its the first resistance loong shunt one first triode, the first electric capacity loong shunt 1 the 3rd resistance; Right loop is made up of the first stabilivolt, the second stabilivolt, the 4th resistance, the 5th resistance and the 4th electric capacity, its first stabilivolt, the second stabilivolt, the 4th resistance, the 5th resistance and the 4th electric capacity form series loop, its the 5th resistance loong shunt one second electric capacity, one the 3rd electric capacity, its left loop is connected with second triode of right loop by built-in two biasing resistors.
The beneficial effects of the utility model are: circuit is simple, reliably, are easy to realize.There is certain application and promotional value.
Accompanying drawing illustrates:
Fig. 1 is the utility model product circuit element schematic
Embodiment:
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail
As shown in Figure 1: a kind of automobile ACC signal deteching circuit, be made up of stabilivolt Z, resistance R, electric capacity C, triode Q, left loop is made up of the first resistance R1, the second resistance R2, the first electric capacity C1, wherein the first resistance R1, the second resistance R2 and the first electric capacity C1 are for connecting, its first resistance R1 loong shunt one first triode Q1, the first electric capacity C1 loong shunt 1 the 3rd resistance R3, right loop is by the first stabilivolt Z1, second stabilivolt Z2, 4th resistance R4, 5th resistance R5 and the 4th electric capacity C4 is formed, its first stabilivolt Z1, second stabilivolt Z2, 4th resistance R4, 5th resistance R5 and the 4th electric capacity C4 forms series loop, its 5th resistance R5 loong shunt one second electric capacity C2, one the 3rd electric capacity C3, its left loop is connected with the second triode Q2 of right loop by built-in two biasing resistors, make right side circuit on-off action is played to left side circuit, wherein the second triode Q2 in left loop with the first resistance R1, second resistance R2 and the first electric capacity C1 for connecting, simultaneously the second triode Q2 in right loop with the first stabilivolt Z1, second stabilivolt Z2, 4th resistance R4, 5th resistance R5 and the 4th electric capacity C4 connects, and carries out step-down, additional filter capacitor and biasing resistor, make it reach triode saturation conduction input requirements, play simple switch and buffer action by one or two 7.5V voltage stabilizing diode to input ACC power supply.ACC signal can be detected, ACC signal can be isolated again, make the MCU of detection circuitry from interference.
This circuit can adapt to the ACC input of 24V and 12V system automobile by the open circuit of Zero-ohm resistor R6 and short circuit, when automobile key connects ACC, if 24V system, then ACC_+24V input terminal voltage is 24V, in like manner, during 12V system, ACC_+24V input terminal voltage is 12V.
In circuit, U3V3 is 3.3V; ACC_DET outputs signal, output low level (0V) and high level (3.3V); ACC_+24V is input signal, input 24V or 12V.
1,24V system:
R6 open circuit, Z1, Z2, R4, R5 connect, and two voltage stabilizing diodes get about 15V voltage jointly, (reality is very little not consider point function of current of Q2, when simplifying calculating, can ignore), resistance R5 divides voltage is ((24V-15V) * 47K)/57K ≈ 7V, be carried in the base stage of Q2, Q2 is the NPN type triode of built-in two 4.7K biasing resistors, Q2 saturation conduction, saturation conduction voltage is about 0.4V, at R1, R2, in Q2 (NPN type triode) series circuit, Q2 collector 0.4V voltage is loaded into the base stage of PNP type triode Q1 by resistance R2, be low level, Q1 is saturation conduction also, the emitter E of Q1 and collector C conducting, ACC_DET voltage approximates 3.3V, for high level.
In like manner, when automobile key does not connect ACC, ACC_+24V input terminal voltage is unsettled or 0V, then Q2 cut-off.
The base stage of Q1 is essentially pulled up to 3.3V by resistance R1, and be high level, Q1 also ends, ACC_DET by resistance R3 drop-down be 0V.
2,12V system:
R6 short circuit, stabilivolt Z1 works, and circuit other parts are similar.
Two, part of devices function introduction:
Electric capacity C1 is serially connected between ACC_+24V input end and ground and plays High frequency filter effect; C2, C3 are connected in parallel on triode Q2 base stage place, have both filtered high frequency and have also filtered low frequency.C is serially connected between output terminal and ground and also plays filter low frequency contribution.
Claims (1)
1. an automobile ACC signal deteching circuit, be made up of stabilivolt Z, resistance R, electric capacity C, triode Q, it is characterized in that: left loop is made up of the first resistance R1, the second resistance R2, the first electric capacity C1, wherein the first resistance R1, the second resistance R2 and the first electric capacity C1 are for connecting, its first resistance R1 loong shunt one first triode Q1, the first electric capacity C1 loong shunt 1 the 3rd resistance R3; Right loop is made up of the first stabilivolt Z1, the second stabilivolt Z2, the 4th resistance R4, the 5th resistance R5 and the 4th electric capacity C4, its first stabilivolt Z1, the second stabilivolt Z2, the 4th resistance R4, the 5th resistance R5 and the 4th electric capacity C4 form series loop, its the 5th resistance R5 loong shunt one second electric capacity C2, one the 3rd electric capacity C3, its left loop is connected with the second triode Q2 of right loop by built-in two biasing resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599092.5U CN204086374U (en) | 2014-09-30 | 2014-09-30 | A kind of automobile ACC signal deteching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420599092.5U CN204086374U (en) | 2014-09-30 | 2014-09-30 | A kind of automobile ACC signal deteching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204086374U true CN204086374U (en) | 2015-01-07 |
Family
ID=52179075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420599092.5U Expired - Fee Related CN204086374U (en) | 2014-09-30 | 2014-09-30 | A kind of automobile ACC signal deteching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204086374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523241A (en) * | 2016-12-20 | 2017-03-22 | 清华大学苏州汽车研究院（吴江） | Detection circuit of retrofiring state of automobile |
-
2014
- 2014-09-30 CN CN201420599092.5U patent/CN204086374U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523241A (en) * | 2016-12-20 | 2017-03-22 | 清华大学苏州汽车研究院（吴江） | Detection circuit of retrofiring state of automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20150930 |
|
| EXPY | Termination of patent right or utility model |