CN103914015B - The monostable control signal output noise trap of the power module of vehicle electronics and anti-interference method - Google Patents
The monostable control signal output noise trap of the power module of vehicle electronics and anti-interference method Download PDFInfo
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- CN103914015B CN103914015B CN201410107904.4A CN201410107904A CN103914015B CN 103914015 B CN103914015 B CN 103914015B CN 201410107904 A CN201410107904 A CN 201410107904A CN 103914015 B CN103914015 B CN 103914015B
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Abstract
The monostable control signal output noise trap of the power module of vehicle electronics and anti-interference method, belong to signal control field, in order to improve the reliability and stability that power module is controlled by automobile microcontroller, reduce the electromagnetic interference problem on the impact of control signal.It includes diode D902, resistance R901, No. two resistance R924, No. two electric capacity C906 and control signal generator V901, and add an electric capacity C930 and No. three resistance R902, and the discharge circuit formed, this discharge circuit effectively avoids of short duration impulse disturbances and maloperation, also use control signal generator V901, MCU to be connected with control signal generator V901 simultaneously；Ensure that having MCU only needs control signal generator V901 to control the closedown of the power module of vehicle electronics and to restart according to program.For the control to vehicle electronics power module.
Description
Technical field
The present invention relates to a kind of signal output noise trap and method, belong to signal control field.
Background technology
Enable and the control of the power module of vehicle electronics is mostly by the key electricity IG power supply on automobile at present, to vapour
The power module of car electronic equipment enables and controls, and power supply output only just can be made after enabling power module normal；
Wherein, so-called key electricity IG power supply refers to that the power supply that ON shelves are connected got to by key, in engine startup constantly namely
The power supply opened；This part electrical appliance one is to power to necessary electrical appliance in engine starting process, and two is to work at electromotor
Just use in the case of operating, take from the power supply of electromotor, it is to avoid when charging for accumulator, strive the probability of power supply.
But owing to the stability of the power module of vehicle electronics is affected by the electromagnetic interference of automotive interior, thus lead
Cause the ability by the power module of vehicle electronics is controlled by automobile microcontroller program to reduce, the most very
Difficulty reaches to be realized smoothly controlling the purpose restarted of electronic equipment hardware by the means of software program.
Along with popularizing of car operating system, the operating system of increasing Android system and degree of depth customization is used in automobile
On electronic equipment, thereby ensure that the stability of the power module of vehicle electronics, strengthen its anti-electromagnetic interference capability, use
MCU (MicroControllerUnit) Chinese is multipoint control unit, also known as software program controls such as one chip microcomputers
The power module of vehicle electronics processed restarts and is just particularly important.
Summary of the invention
The present invention is to improve the reliability and stability that power module is controlled by automobile microcontroller, reduces electromagnetism and does
The problem disturbing the impact on control signal, it is provided that the monostable control signal output of the power module of a kind of vehicle electronics
Noise trap and anti-interference method.
The monostable control signal output noise trap of the power module of vehicle electronics of the present invention, described automobile
The voltage signal input of the key electricity IG power supply of the monostable control signal output noise trap of the power module of electronic equipment
End is connected with the voltage signal output end of automobile key electricity IG power supply；The monostable of the power module of described vehicle electronics
The signal output part that enables of control signal output noise trap passes through enable pin and the vapour of vehicle electronics power module
The enable signal input part of car electronic equipment power source module is connected；The effective control signal of high level of automobile microcontroller is defeated
The high level of the monostable control signal output noise trap going out the power module of end connection vehicle electronics effectively controls
Signal input part；
The power module of described vehicle electronics monostable control signal output noise trap include diode, No. one
Resistance, No. two resistance, No. three resistance, an electric capacity, No. two electric capacity and control signal generator；
The anode of described diode is the monostable control signal output noise trap of the power module of vehicle electronics
Key electricity IG power supply voltage signal input, the negative electrode of diode connects one end of a resistance, this resistance another
One end is simultaneously connected with No. 3 pins of control signal generator, one end of No. two resistance, one end of an electric capacity, No. three resistance
One end and No. 1 pin of control signal generator；
The other end of described No. two resistance is simultaneously connected with No. 2 pins and the power supply ground of control signal generator；
The other end of described No. three resistance be simultaneously connected with No. 6 pins of control signal generator, the other end of an electric capacity, two
One end of number electric capacity and power supply ground；
No. 4 output pins of described control signal generator are the enable letter of monostable control signal output noise trap
Number output pin, this pin enables while pin for the power module connecting vehicle electronics, connects No. two electric capacity
The other end；
No. 5 input pins of described control signal generator are connected with the high level useful signal outfan of MCU.
Described diode uses the diode that model is SOT-23-BAS21.
A described resistance, No. two resistance and No. three resistance all use the resistance that model is RC-0603-10K-J.
Described control signal generator uses the control signal generation chip that model is SOT23-6-IMD3A.
The electric capacity that model is 50TGX47M6.3X8 that a described electric capacity uses.
Described No. two electric capacity use the electric capacity that capacitance is 0.01uF.
The anti-interference method of the monostable control signal output noise trap of the power module of vehicle electronics, the method is real
Existing process is:
Step one, key electricity IG power supply electrifying, the monostable control signal output of the power module of vehicle electronics is anti-dry
The key electricity IG power supply voltage signal input disturbing device receives the voltage signal that key electricity IG power supply sends, and described voltage is believed
No. 3 pins to control signal generator are inputted again number after diode counnter attack after a shunt resistance filtering；And lead to
Cross enable signal stable through No. 4 output pin output of control signal generator after control signal generator filters again；
The voltage signal that step 2, key electricity IG power supply send is that an electric capacity charges after being filtered by a shunt resistance；
Step 3, the discharge circuit being made up of an electric capacity and No. three resistance are that control signal generator provides high level signal,
Continuing to normally work, the significant level time of control signal generator is by the regulation capacitance of a number electric capacity and No. three resistance
Resistance value control；
Step 4, when the elapsed time interval T after, automobile microcontroller is that No. 5 pins of control signal generator carry
During for high level useful signal, No. 4 output pins of control signal generator can stop enabling pin for it provides effective letter
Number, the power module of described vehicle electronics quits work；
Step 5, stop being that No. 5 pins of control signal generator provide effective high level when automobile microcontroller
Signal, now No. 5 pins of control signal generator present low level, then key electricity IG power supply may proceed to as control signal
Generator provides stablizes high level useful signal, makes No. 4 output pin output high level of control signal generator effectively believe
Number, then the power module of vehicle electronics provides power supply for vehicle electronics power module.
Advantages of the present invention: the discharge circuit that the present invention is made up of an electric capacity C930 and No. three resistance R902 employing,
Effectively avoid extraneous of short duration impulse disturbances and maloperation, have employed control signal generator V901, microcontroller simultaneously
Device MCU is connected with control signal generator V901；Ensure that having microcontroller only needs to control control according to program
When signal generator V901 processed controls the closedown of the power module of vehicle electronics and restarts so that automotive electronics
The closedown of the power module of equipment and restart the most smooth and easy, improves than the anti-interference rate being provided without the diamagnetic interference of this device
50%, and then improve whole equipment operating efficiency and reliability.
Accompanying drawing explanation
Fig. 1 is the electricity of the monostable control signal output noise trap of the power module of vehicle electronics of the present invention
Road schematic diagram.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described below in conjunction with Fig. 1, the electricity of vehicle electronics described in present embodiment
The monostable control signal output noise trap of source module, the monostable control signal of the power module of vehicle electronics is defeated
Key electricity IG power supply 1 voltage signal inputs going out noise trap 4 is defeated with the voltage signal of automobile key electricity IG power supply 1
Go out end to be connected；The enable signal of the monostable control signal output noise trap 4 of the power module of described vehicle electronics
Outfan is defeated with the enable signal of vehicle electronics power module 3 by the enable pin of vehicle electronics power module 3
Enter end to be connected；High level effective control signal outfan of automobile microcontroller 2 connects the power supply mould of vehicle electronics
High level effective control signal input of the monostable control signal output noise trap 4 of block；
The monostable control signal output noise trap 4 of the power module of described vehicle electronics includes diode
D902, resistance R901, No. two resistance R924, No. three resistance R902, electric capacity C930, No. two electric capacity C906
With control signal generator V901；
The monostable control signal output that the anode of described diode D902 is the power module of vehicle electronics is anti-interference
The key electricity IG power supply voltage signal input of device, the negative electrode of diode D902 connects one end of a resistance R901,
The other end of this resistance R901 is simultaneously connected with No. 3 pins of control signal generator V901, No. two resistance R924
No. 1 pin of one end, one end of an electric capacity C930, one end of No. three resistance R902 and control signal generator V901；
The other end of described No. two resistance R924 is simultaneously connected with No. 2 pins and the power supply ground of control signal generator V901；
The other end of described No. three resistance R902 is simultaneously connected with No. 6 pins of control signal generator V901, an electric capacity
The other end of C930, one end of No. two electric capacity C906 and power supply ground；
No. 4 output pins of described control signal generator V901 are monostable control signal output noise trap
Enable signal output part, No. 4 output pins of described control signal generator V901 are simultaneously connected with automotive electronics and set
Standby power module enables pin and the other end of No. two electric capacity C906；
No. 5 input pins of described control signal generator V901 and high level effective control signal outfan of MCU2
Connect.
Detailed description of the invention two: present embodiment is described below in conjunction with Fig. 1, embodiment one is made further by present embodiment
Illustrating, the diode D902 described in present embodiment uses the diode that model is SOT-23-BAS21.
Detailed description of the invention three: present embodiment is described below in conjunction with Fig. 1, embodiment one is made further by present embodiment
Illustrate, a resistance R901 described in present embodiment, all the using of No. two resistance R924 and No. three resistance R902
Model is the resistance of RC-0603-10K-J.
Detailed description of the invention four: present embodiment is described below in conjunction with Fig. 1, embodiment one is made further by present embodiment
Illustrating, the control signal generator V901 described in present embodiment uses the control letter that model is SOT23-6-IMD3A
Number occur chip.
Detailed description of the invention five: present embodiment is described below in conjunction with Fig. 1, embodiment one is made further by present embodiment
Illustrate, the electric capacity that model is 50TGX47M6.3X8 that an electric capacity C930 described in present embodiment uses.
Detailed description of the invention six: present embodiment is described below in conjunction with Fig. 1, embodiment one is made further by present embodiment
Illustrating, No. two electric capacity C906 described in present embodiment use the electric capacity that capacitance is 0.01uF.
Detailed description of the invention seven: present embodiment is described below in conjunction with Fig. 1, the vehicle electronics described in present embodiment
The anti-interference method of the monostable control signal output noise trap of power module, the process that realizes of the method is:
Step one, key electricity IG power supply 1 power on, and the monostable control signal output of the power module of vehicle electronics is anti-
The key electricity IG power supply voltage signal input of countermeasure set 4 receives the voltage signal that key electricity IG power supply 1 sends, described
Voltage signal inputs to control signal generator after diode D902 counnter attack after a resistance R901 shunting filtering again
No. 3 pins of V901；And through the 4 of control signal generator V901 after again being filtered by control signal generator V901
The enable signal that the output of number output pin is stable；
The voltage signal that step 2, key electricity IG power supply 1 send is an electricity after being filtered by a resistance R901 shunting
Hold C930 charging；
Step 3, the discharge circuit being made up of an electric capacity C930 and No. three resistance R902 are control signal generator V901
There is provided high level signal so that it is continuing normal work, the significant level time of control signal generator V901 is by regulation one
Number capacitance of electric capacity C930 and the resistance value of No. three resistance R902 control；
Step 4, when the elapsed time interval T after, automobile microcontroller 2 is No. 5 of control signal generator V901
When pin provides high level useful signal, No. 4 output pins of control signal generator V901 can stop enabling pin for it
Effective signal, the power module of described vehicle electronics is provided to quit work；
Step 5, stop providing effective for No. 5 pins of control signal generator V901 when automobile microcontroller 2
High level signal, now No. 5 pins of control signal generator V901 present low level, then key electricity IG power supply 1 can continue
Continue to provide for control signal generator V901 and stablize high level useful signal, make No. 4 outputs of control signal generator V901
Pin output high level useful signal, then the power module of vehicle electronics provides electricity for vehicle electronics power module 3
Source.
Above content is to combine concrete preferred implementation further description made for the present invention, it is impossible to assert this
Bright being embodied as is confined to these explanations.Without departing from this for this person of an ordinary skill in the technical field
On the premise of bright design, it is also possible to make some simple deduction or replace, all should be considered as belonging to the right that the present invention is submitted to
The scope of patent protection that claim determines.
Claims (7)
1. the monostable control signal output noise trap of the power module of vehicle electronics, it is characterised in that automotive electronics
Key electricity IG power supply (1) voltage signal of monostable control signal output noise trap (4) of the power module of equipment is defeated
Enter end to be connected with the voltage signal output end of automobile key electricity IG power supply (1)；The power module of described vehicle electronics
The enable signal output part of monostable control signal output noise trap (4) is by vehicle electronics power module (3)
Enable pin be connected with the enable signal input part of vehicle electronics power module (3)；Automobile microcontroller (2)
High level effective control signal outfan connect vehicle electronics power module monostable control signal output anti-interference
High level effective control signal input of device (4)；
Monostable control signal output noise trap (4) of the power module of described vehicle electronics includes diode
(D902), resistance (R901), No. two resistance (R924), No. three resistance (R902), electric capacity (C930),
No. two electric capacity (C906) and control signal generator (V901)；
The monostable control signal output that the anode of described diode (D902) is the power module of vehicle electronics is anti-dry
Disturbing the key electricity IG power supply voltage signal input of device, the negative electrode of diode (D902) connects a resistance (R901)
One end, the other end of this resistance (R901) be simultaneously connected with No. 3 pins of control signal generator (V901), No. two
One end of resistance (R924), one end of an electric capacity (C930), one end of No. three resistance (R902) and control signal are sent out
No. 1 pin of raw device (V901)；
The other end of described No. two resistance (R924) is simultaneously connected with No. 2 pins and the power supply of control signal generator (V901)
Ground；
The other end of described No. three resistance (R902) be simultaneously connected with No. 6 pins of control signal generator (V901), No. one
The other end of electric capacity (C930), one end of No. two electric capacity (C906) and power supply ground；
No. 4 output pins of described control signal generator (V901) are monostable control signal output noise trap
Enabling signal output part, No. 4 output pins of described control signal generator (V901) are simultaneously connected with vehicle electronics
Power module enables pin and the other end of No. two electric capacity (C906)；
No. 5 input pins of described control signal generator (V901) export with the effective control signal of high level of MCU (2)
End connects.
The monostable control signal output noise trap of the power module of vehicle electronics the most according to claim 1,
It is characterized in that, described diode (D902) uses the diode that model is SOT-23-BAS21.
The monostable control signal output noise trap of the power module of vehicle electronics the most according to claim 1,
It is characterized in that, all using of a described resistance (R901), No. two resistance (R924) and No. three resistance (R902)
Be model be the resistance of RC-0603-10K-J.
The monostable control signal output noise trap of the power module of vehicle electronics the most according to claim 1,
It is characterized in that, described control signal generator (V901) uses the control signal that model is SOT23-6-IMD3A and sends out
Raw chip.
The monostable control signal output noise trap of the power module of vehicle electronics the most according to claim 1,
It is characterized in that, the electric capacity that model is 50TGX47M6.3X8 that a described electric capacity (C930) uses.
The monostable control signal output noise trap of the power module of vehicle electronics the most according to claim 1,
It is characterized in that, described No. two electric capacity (C906) use the electric capacity that capacitance is 0.01uF.
7. the monostable control signal of the power module of vehicle electronics described in application claim 1 exports noise trap
Anti-interference method, it is characterised in that the process that realizes of the method is:
Step one, key electricity IG power supply (1) power on, the monostable control signal output of the power module of vehicle electronics
The key electricity IG power supply voltage signal input of noise trap (4) receives the voltage letter that key electricity IG power supply (1) sends
Number, described voltage signal input after the shunting filtering of resistance (R901) again after diode (D902) counnter attack to
No. 3 pins of control signal generator (V901)；And through controlling after again being filtered by control signal generator (V901)
No. 4 output pins of signal generator (V901) export stable enable signal；
The voltage signal that step 2, key electricity IG power supply (1) send is one after being filtered by resistance (R901) shunting
The charging of number electric capacity (C930)；
Step 3, the discharge circuit being made up of an electric capacity (C930) and No. three resistance (R902) are control signal generator
(V901) high level signal is provided so that it is continue normal work, the significant level time of control signal generator (V901)
Controlled by the capacitance of a number electric capacity (C930) of regulation and the resistance value of No. three resistance (R902)；
Step 4, when the elapsed time interval T after, automobile microcontroller (2) is control signal generator (V901)
When No. 5 pins provide high level useful signal, No. 4 output pins of control signal generator (V901) can stop making for it
Can provide effective signal by pin, the power module of described vehicle electronics quits work；
Step 5, stop being provided with for No. 5 pins of control signal generator (V901) when automobile microcontroller (2)
The high level signal of effect, now No. 5 pins of control signal generator (V901) present low level, then key electricity IG power supply
(1) may proceed to provide into control signal generator (V901) stablize high level useful signal, make control signal generator (V901)
No. 4 output pins output high level useful signals, then the power module of vehicle electronics is vehicle electronics power supply moulds
Block (3) provides power supply.
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| CN201410107904.4A CN103914015B (en) | 2014-03-21 | 2014-03-21 | The monostable control signal output noise trap of the power module of vehicle electronics and anti-interference method |
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| CN103914015B true CN103914015B (en) | 2016-08-17 |
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