CN207720108U - A kind of automobile shift signal detection circuit - Google Patents
A kind of automobile shift signal detection circuit Download PDFInfo
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- CN207720108U CN207720108U CN201820075287.8U CN201820075287U CN207720108U CN 207720108 U CN207720108 U CN 207720108U CN 201820075287 U CN201820075287 U CN 201820075287U CN 207720108 U CN207720108 U CN 207720108U
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- nmos tube
- signal detection
- detection circuit
- shift signal
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Abstract
The utility model discloses a kind of automobile shift signal detection circuit, is related to automobile technical field, and the automobile shift signal detection circuit includes：NMOS tube PQ2, resistance PR6, resistance PR8, resistance PR3, resistance PR7, resistance PR10, diode Z4；Wherein, one end of the grid G difference connecting resistance PR6 of the NMOS tube PQ2, resistance PR8 one end；The other end of another termination input control the end P_CTR, the resistance PR8 of the resistance PR6 are grounded；The drain D of the NMOS tube PQ2 meets input terminal P_OUT；One end of the source S difference connecting resistance PR7 of the NMOS tube PQ2, one end of resistance PR3, the other end ground connection of the resistance PR3；One end of the other end difference connecting resistance PR10 of the resistance PR7, the cathode and output end P_OUT_CHK of diode Z4；The plus earth of the other end of the resistance PR10 and the diode Z4.Circuit provided by the utility model can be used for automobile P gear output signal whether overcurrent, to send out fault cues.
Description
Technical field
The utility model is related to automobile technical field more particularly to a kind of automobile shift signal detection circuits.
Background technology
With the development of technology, application of the electronic technology on automobile is more and more, therefore, the automatization level of automobile
Significant raising is obtained.
For example, the application of keyless systems (PEPS), may be implemented the one-key start of automobile.
Traditional P shelves signals to one-key start are mechanical switch, there are problems that durable aging.If mechanical switch connects
Tactile bad, keyless systems (PEPS) will not receive P grades of signals, and vehicle just can not normally start.
In addition, electronic switch may be used in the P shelves signals of one-key start, the gear of P gears is detected by electronic technology, and defeated
Go out to activation system.
Invention content
The technical problem to be solved by the utility model is to whether the output signal for how detecting P gears has the event of overcurrent
Barrier.
The utility model solves its technical problem, proposes a kind of automobile shift signal detection circuit.
The automobile shift signal detection circuit includes：
NMOS tube PQ2, resistance PR6, resistance PR8, resistance PR3, resistance PR7, resistance PR10, diode Z4；
Wherein, one end of the grid G difference connecting resistance PR6 of the NMOS tube PQ2, resistance PR8 one end；The resistance
The other end of another termination input control the end P_CTR, the resistance PR8 of PR6 are grounded；
The drain D of the NMOS tube PQ2 meets input terminal P_OUT；
One end of the source S difference connecting resistance PR7 of the NMOS tube PQ2, one end of resistance PR3, the resistance PR3's is another
One end is grounded；One end of the other end difference connecting resistance PR10 of the resistance PR7, the cathode and output end P_ of diode Z4
OUT_CHK；The plus earth of the other end of the resistance PR10 and the diode Z4.
Further, the resistance PR3 is resettable fuse.
Further, the diode Z4 is zener diode.
Further, the NMOS tube PQ2 is N-channel enhancement mode FET.
The utility model provides a kind of automobile shift signal detection circuit, while providing the shift signal of P gears, also
Whether the output signal that can be used for detecting P gears had flow problem.When flow problem occurred, controller can pass through input control end
Control NMOS tube cut-off, the output of shutdown signal detection circuit.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for automobile shift signal detection circuit that the utility model embodiment one provides.
Specific implementation mode
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
It is also understood that specific embodiment described herein is used only for understanding the utility model, it is not used to limit
The utility model.
Embodiment one
The present embodiment provides a kind of automobile shift signal detection circuits, and structural schematic diagram is as shown in Figure 1, details are as follows：
The automobile shift signal detection circuit includes：
NMOS tube PQ2, resistance PR6, resistance PR8, resistance PR3, resistance PR7, resistance PR10, diode Z4；
Wherein, one end of the grid G difference connecting resistance PR6 of the NMOS tube PQ2, resistance PR8 one end；The resistance
The other end of another termination input control the end P_CTR, the resistance PR8 of PR6 are grounded；
The drain D of the NMOS tube PQ2 meets input terminal P_OUT；
One end of the source S difference connecting resistance PR7 of the NMOS tube PQ2, one end of resistance PR3, the resistance PR3's is another
One end is grounded；One end of the other end difference connecting resistance PR10 of the resistance PR7, the cathode and output end P_ of diode Z4
OUT_CHK；The plus earth of the other end of the resistance PR10 and the diode Z4.
In the present invention, the input terminal P_OUT is that P keeps off signal, when starting automobile by one-key start function,
Automobile is needed to be on preset gear, such as P gears.Only when automobile is in P gears, vehicle could normally start.
Further, input terminal P_OUT is the shift signal of P gears, can be used for detecting whether automobile keeps off in P.This circuit
Output end P_OUT_CHK can be connect with the controller of activation system, the controller can be exported by output end P_OUT_CHK
Signal judge the automobile whether in P keep off.
Further, the signal that the controller can also be exported by output end P_OUT_CHK judge this circuit whether mistake
Stream, when overcurrent, controller passes through the output signal of control input control end P_CTR so that the NMOS tube PQ2 cut-offs, pass
Close the output of signal deteching circuit.
Specifically, the control terminal P_CTR and output end P_OUT_CHK is connected to the controller of vehicle.The controller
It can be microcontroller.
The controller can also carry out AD samplings, and root by the voltage value of the signal exported to output end P_OUT_CHK
Judge whether overcurrent according to sampled result.
When NMOS tube PQ2 is connected, when the shift signal P_OUT electric currents of P gears increase, the drain D of NMOS tube PQ2
Input current increases, and the output current of source S also increases, and the voltage at the both ends resistance PR3 increases, the output end P_OUT_ of circuit
The output voltage of CHK increases, and has the overcurrent that can cause circuit.
Due to being switched off and on depending on the voltage V (GS) between grid G and source S for NMOS tube PQ2.When V (GS) is super
When crossing cut-in voltage, conducting, conversely, cut-off.So controller can pass through the output voltage control of control input control end P_CTR
The conducting and cut-off of NMOS tube PQ2 processed.
Further, the resistance PR3 is resettable fuse.When external loading increases, PR3 resettable fuse electricity
Resistance increases, and the voltage at both ends increases.
Further, the diode Z4 is zener diode.
Further, the NMOS tube PQ2 is N-channel enhancement mode FET.
The utility model provides a kind of automobile shift signal detection circuit, and whether the output signal of detectable P gears had
Flow problem.When flow problem occurred, controller can control NMOS tube PQ2 cut-offs by input control end, turn off the switch circuit
Output.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (4)
1. a kind of automobile shift signal detection circuit, which is characterized in that including：NMOS tube PQ2, resistance PR6, resistance PR8, resistance
PR3, resistance PR7, resistance PR10, diode Z4；
Wherein, one end of the grid G difference connecting resistance PR6 of the NMOS tube PQ2, resistance PR8 one end；The resistance PR6's
The other end of another termination input control end P_CTR, the resistance PR8 are grounded；
The drain D of the NMOS tube PQ2 meets input terminal P_OUT；
One end of the source S difference connecting resistance PR7 of the NMOS tube PQ2, one end of resistance PR3, the other end of the resistance PR3
Ground connection；One end of the other end difference connecting resistance PR10 of the resistance PR7, the cathode and output end P_OUT_ of diode Z4
CHK；The plus earth of the other end of the resistance PR10 and the diode Z4.
2. automobile shift signal detection circuit according to claim 1, which is characterized in that the resistance PR3 is that can restore
Fuse.
3. automobile shift signal detection circuit according to claim 1, which is characterized in that the diode Z4 is voltage stabilizing two
Pole pipe.
4. automobile shift signal detection circuit according to claim 1, which is characterized in that the NMOS tube PQ2 is N-channel
Enhanced field-effect tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820075287.8U CN207720108U (en) | 2018-01-17 | 2018-01-17 | A kind of automobile shift signal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820075287.8U CN207720108U (en) | 2018-01-17 | 2018-01-17 | A kind of automobile shift signal detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207720108U true CN207720108U (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820075287.8U Active CN207720108U (en) | 2018-01-17 | 2018-01-17 | A kind of automobile shift signal detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462487A (en) * | 2018-01-17 | 2018-08-28 | 宁波高发汽车控制系统股份有限公司 | A kind of automobile shift signal detection circuit |
-
2018
- 2018-01-17 CN CN201820075287.8U patent/CN207720108U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462487A (en) * | 2018-01-17 | 2018-08-28 | 宁波高发汽车控制系统股份有限公司 | A kind of automobile shift signal detection circuit |
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