CN107910859A - A kind of protective device of electronic control unit - Google Patents
A kind of protective device of electronic control unit Download PDFInfo
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- CN107910859A CN107910859A CN201711454907.5A CN201711454907A CN107910859A CN 107910859 A CN107910859 A CN 107910859A CN 201711454907 A CN201711454907 A CN 201711454907A CN 107910859 A CN107910859 A CN 107910859A
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- 230000001681 protective effect Effects 0.000 title claims abstract description 45
- 238000012545 processing Methods 0.000 claims abstract description 85
- 230000005611 electricity Effects 0.000 claims description 14
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- 238000004891 communication Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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Abstract
The present invention provides a kind of protective device of electronic control unit; the target voltage signal of input can be identified in voltage protection circuit in the device; when it is the inverse electromotive force that targeted loads moment produces to identify target voltage signal; the inverse electromotive force can be discharged; so as to avoid inverse electromotive force from being input to the T15 stitch of electronic control unit, realize and the T15 stitch of electronic control unit forever, is effectively protected.In addition; the protective device of electronic control unit provided by the invention can also will input the voltage stabilization to T15 stitch in electronic control unit normal range of operation by signal processing circuit and regulator circuit; avoiding the fluctuation of input voltage causes the voltage fluctuation of electronic control unit T15 stitch; then cause ECU to reset, influence engine operation.
Description
Technical field
The present invention relates to electric-control motor technical field, more particularly to a kind of protective device of electronic control unit.
Background technology
At present, the T15 stitch of the electronic control unit (Electronic Control Unit, ECU) of electric-control motor can
The amplitude and limited time of inverse electromotive force are born, traditional protection measure is tended to rely on to be increased such as in vehicle electric appliance circuits
The electrical parts such as disconnecting relay, fly-wheel diode isolate and afterflow the electromotive force for reversely flowing into T15 stitch, play pair
The protective effect of T15 stitch.However, the factor such as the aging and vibration of overall wire sheaves, burn into high temperature may result in isolation relay
Device fails or fly-wheel diode is breakdown, i.e. the T15 stitch of electronic control unit still has breakdown risk, and this wind
Dangerous probability is very high.Therefore, it is urgent to provide a kind of protective device, the T15 stitch of electronic control unit can be carried out permanent, effective
Protect on ground.
The content of the invention
In view of this, the present invention provides a kind of protective device of electronic control unit, to electronic control unit
The progress of T15 stitch is permanent, effectively protects, its technical solution is as follows：
A kind of protective device of electronic control unit, including：Voltage protection circuit；
The voltage protection circuit is connected between key switch and the electronic control unit, is moved in the key switch
When making, target voltage signal is received, determines whether the target voltage signal is the inverse electromotive force produced targeted loads moment,
In inverse electromotive force of the target voltage signal for targeted loads moment generation, the target voltage signal is discharged
Go out.
Preferably, the protective device of the electronic control unit, further includes：Signal processing circuit and regulator circuit；
The input terminal of the voltage protection circuit is connected with the key switch, the output terminal of the voltage protection circuit with
The input terminal connection of the signal processing circuit, the output terminal of the signal processing circuit and the input terminal of the regulator circuit connect
Connect, the output terminal of the regulator circuit is connected with the T15 stitch of the electronic control unit；
The voltage protection circuit, does not produce reverse electronic in the target voltage signal for the targeted loads moment
During gesture, the target voltage signal is exported to the signal processing circuit；
The signal processing circuit, receives the target voltage signal of the voltage protection circuit output, based on described
The amplitude of target voltage signal judges whether to need to carry out attenuation processing or enhanced processing to the target voltage signal, if so,
Attenuation processing or enhanced processing then are carried out to the target voltage signal, and the voltage signal after processing is exported to the voltage stabilizing
Circuit, otherwise, directly exports the target voltage signal to the regulator circuit；
The regulator circuit, receives the voltage signal of the signal processing circuit output, defeated to the signal processing circuit
The voltage signal gone out carries out voltage stabilizing processing, and exports the voltage signal after voltage stabilizing processing to the T15 pins of the electronic control unit
Foot.
Wherein, the voltage protection circuit, including：Voltage comparison unit and voltage releasing unit；
The voltage comparison unit, by the amplitude of the target voltage signal compared with the first preset value, described
The amplitude of target voltage signal is more than first preset value, and the duration of the target voltage signal is less than first and presets
During duration, the target voltage signal is exported to the voltage releasing unit, is less than in the amplitude of the target voltage signal
Or equal to first preset value, and when the duration of the target voltage signal is more than the second preset duration, by the mesh
Mark voltage signal is exported to the signal processing circuit；
The voltage releasing unit, for the target voltage signal to be discharged.
Wherein, the voltage comparison unit is voltage comparator, and the voltage releasing unit is varistor；
The input terminal of the voltage comparator is connected with the key switch, the first output terminal of the voltage comparator with
The input terminal connection of the signal processing circuit, the second output terminal of the voltage comparator and the first end of the varistor
Connection, the second end ground connection of the varistor；
The voltage comparator, by the amplitude of the target voltage signal compared with the first preset value, in the mesh
The amplitude of mark voltage signal is more than first preset value, and the duration of the target voltage signal is pre- less than described first
If during duration, second channel conducting, the target voltage signal is exported to the varistor by second output terminal,
The amplitude of the target voltage signal is less than or equal to first preset value, and the duration of the target voltage signal is big
When the second preset duration, first passage conducting, the target voltage signal is exported to the letter by first output terminal
Number process circuit；
The varistor, the target voltage signal that second output terminal of the voltage comparator exports is released
Run out.
Wherein, the signal processing circuit includes：Voltage comparison unit and signal processing unit；
The voltage comparison unit, by the amplitude of the target voltage signal and the second preset value and the 3rd preset value ratio
Compared with being more than second preset value in the amplitude of the target voltage signal, alternatively, the amplitude of the target voltage signal is less than
During three preset value, the target voltage signal is exported to the signal processing unit, in the target voltage signal
Amplitude be greater than or equal to the 3rd preset value, also, the amplitude of the target voltage signal is less than or equal to described second
During preset value, the target voltage signal is exported to the regulator circuit；
The signal processing unit, carries out attenuation processing or enhanced processing, by the target to the target voltage signal
Voltage signal is processed into the voltage signal of default amplitude, and the voltage signal of the default amplitude is exported to the regulator circuit,
Wherein, the default amplitude is more than the 3rd preset value and is less than second preset value.
Wherein, the voltage comparison unit is voltage comparator, and the signal processing unit includes：Attenuator circuit and amplification
Circuit；
The input terminal of the voltage comparator is connected with the output terminal of the voltage protection circuit, the voltage comparator
First output terminal is connected with the input terminal of the attenuator circuit, the output terminal of the attenuator circuit and the first of the regulator circuit
Input terminal connects, and the second output terminal of the voltage comparator is connected with the input terminal of the amplifying circuit, the amplifying circuit
Output terminal be connected with the second input terminal of the regulator circuit, the 3rd output terminal of the voltage comparator and voltage stabilizing electricity
The 3rd input terminal connection on road；
The voltage comparator, by the amplitude of the target voltage signal compared with the second preset value and the 3rd preset value,
When the amplitude of the target voltage signal is more than the second preset value, first passage conducting, is exported by first output terminal
The target voltage signal is to the attenuator circuit, when the amplitude of the target voltage signal is less than three preset value,
Second channel turns on, and the target voltage signal is exported to the amplifying circuit by second output terminal, in the target
The amplitude of voltage signal is greater than or equal to the 3rd preset value, also, the amplitude of the target voltage signal is less than or equal to
During second preset value, third channel conducting, the target voltage signal is exported to described steady by the 3rd output terminal
Volt circuit；
The attenuator circuit, the target voltage signal for being more than second preset value to amplitude are carried out at decay
Reason, exports the voltage signal of the default amplitude to the regulator circuit；
The amplifying circuit, the target voltage signal for being less than the 3rd preset value to amplitude are amplified place
Reason, exports the voltage signal of the default amplitude to the regulator circuit.
Wherein, the attenuator circuit, be additionally operable to amplitude be more than second preset value the target voltage signal into
Row filtering process；
The amplifying circuit, the target voltage signal for being additionally operable to be less than amplitude the 3rd preset value are filtered
Processing.
Wherein, the voltage protection circuit, signal processing circuit and regulator circuit are packaged on pcb board.
Wherein, the protective device of the electronic control unit further includes：Package casing；
The voltage protection circuit, the signal processing circuit and the regulator circuit are arranged in the package casing,
Signal is provided with the package casing and moves towards mark.
Wherein, the first end of the protective device of the electronic control unit is connected by plug connector form and the key switch
Connect, the second end of the protective device of the electronic control unit passes through plug connector form and the T15 pins of the electronic control unit
Foot connects.
Above-mentioned technical proposal has the advantages that：
In the protective device of electronic control unit provided by the invention, voltage protection circuit can be to the target voltage of input
Signal is identified, the reverse induction electricity that targeted loads moment produces after identifying target voltage signal for key switch power-off
During kinetic potential, which can be discharged, so as to avoid inverse electromotive force from being input to electronic control unit
T15 stitch, realizes and the T15 stitch of electronic control unit forever, is effectively protected.In addition, electronics control provided by the invention
The protective device of unit processed will be inputted to the voltage stabilization of T15 stitch by signal processing circuit and regulator circuit and is being controlled electronically
In unit normal range of operation, avoiding the fluctuation of input voltage causes the voltage fluctuation of electronic control unit T15 stitch, then
Cause ECU to reset, influence engine operation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structure diagram of electronic control unit protective device provided in an embodiment of the present invention；
Fig. 2 is a concrete structure schematic diagram of electronic control unit protective device provided in an embodiment of the present invention；
Fig. 3 is the structure diagram of an instantiation of electronic control unit protective device provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
An embodiment of the present invention provides a kind of electronic control unit protective device, referring to Fig. 1, showing the knot of the device
Structure schematic diagram, the device can include voltage protection circuit 101, and voltage protection circuit is connected to key switch and electronic control is single
Between member, when key switch acts, target voltage signal is received, determines whether target voltage signal is the production of targeted loads moment
Raw inverse electromotive force, in inverse electromotive force of the target voltage signal for the generation of targeted loads moment, by target voltage signal
Discharge.
Preferably, electronic control unit protective device provided in an embodiment of the present invention, can also include：Signal processing circuit
102 and regulator circuit 103.
The input terminal of voltage protection circuit 101 is connected with key switch, at the output terminal and signal of voltage protection circuit 101
The input terminal connection of circuit 102 is managed, the output terminal of signal processing circuit 102 is connected with the input terminal of regulator circuit 103, voltage stabilizing electricity
The output terminal on road 103 and the T15 stitch of electronic control unit connect.
Voltage protection circuit 101, when target voltage signal is not the inverse electromotive force that targeted loads moment produces, by mesh
Mark voltage signal is exported to signal processing circuit 102.
Signal processing circuit 102, receiving voltage protects the target voltage signal of circuit output, based on target voltage signal
Amplitude judges whether to need to handle target voltage, if so, then handle target voltage, and by the voltage after processing
Otherwise signal output, is directly exported target voltage signal to regulator circuit 103 to regulator circuit 103, wherein, handle to decline
Subtract processing or enhanced processing.
Regulator circuit 103, receives the voltage signal that signal processing circuit 102 exports, to the electricity of signal processing circuit output
Press signal to carry out voltage stabilizing processing, and export the voltage signal after voltage stabilizing processing to the T15 stitch of electronic control unit.
In the protective device of electronic control unit provided by the invention, voltage protection circuit can be to the target voltage of input
Signal is identified, the reverse induction electricity that targeted loads moment produces after identifying target voltage signal for key switch power-off
During kinetic potential, which can be discharged, so that it is single to avoid reverse induction electromotive force from being input to electronic control
The T15 stitch of member, realizes and the T15 stitch of electronic control unit forever, is effectively protected.In addition, the embodiment of the present invention carries
The protective device of the electronic control unit of confession will be inputted to the voltage stabilization of T15 stitch by signal processing circuit and regulator circuit
In electronic control unit normal range of operation, avoiding the fluctuation of input voltage causes electronic control unit T15 stitch voltages
Fluctuation, then causes ECU to reset, and influences engine operation.
In the electronic control unit protective device that above-described embodiment provides, referring to Fig. 2, voltage protection circuit 101 can
With including：Voltage comparison unit 1011 and voltage releasing unit 1012.
Wherein, voltage comparison unit 1011, by the amplitude of target voltage signal compared with the first preset value, in target
The amplitude of voltage signal is more than the first preset value, and when the duration of target voltage signal is less than the first preset duration, by mesh
Mark voltage signal is exported to voltage releasing unit, is less than or equal to the first preset value, and target in the amplitude of target voltage signal
When the duration of voltage signal is more than the second preset duration, target voltage signal is exported to signal processing circuit 102.
Wherein, voltage releasing unit 1012, for target voltage signal to be discharged.
It should be noted that if the amplitude of target voltage signal is more than the first preset value, and target voltage signal continues
Time is less than the first preset duration, then after showing target voltage signal for key switch power-off, targeted loads moment produces anti-
To electromotive force.
In the electronic control unit protective device that above-described embodiment provides, referring to Fig. 2, signal processing circuit 102 can
With including：Voltage comparison unit 1021 and signal processing unit 1022.
Wherein, voltage comparison unit 1021, by the amplitude of target voltage signal and the second preset value and the 3rd preset value ratio
Compared with being more than the second preset value in the amplitude of target voltage signal, alternatively, the amplitude of target voltage signal is less than the 3rd preset value
When, target voltage signal is exported to signal processing unit, is greater than or equal to the 3rd preset value in the amplitude of target voltage signal,
Also, when the amplitude of target voltage signal is less than or equal to the second preset value, target voltage signal is exported to regulator circuit
103。
Signal processing unit 1022, carries out attenuation processing or enhanced processing, by target voltage signal to target voltage signal
The voltage signal of default amplitude is processed into, the voltage signal of default amplitude is exported to regulator circuit 103, wherein, preset amplitude
More than the 3rd preset value and it is less than the second preset value.
On the basis of the embodiments of the present invention, now by an instantiation to electronics control provided in an embodiment of the present invention
Unit protecting device processed illustrates.Referring to Fig. 3, show electronic control unit protective device provided in an embodiment of the present invention
An instantiation structure diagram, can include：Voltage comparator 301, varistor 302, voltage comparator 303, decline
Powered down road 304, amplifying circuit 305 and regulator circuit 306.
Wherein, voltage comparator 301 and varistor 302 form voltage protection circuit, voltage comparator 303, decay electricity
Road 304, amplifying circuit 305 form signal processing circuit.
The input terminal of voltage comparator 301 is connected with key switch, the first output terminal and the voltage ratio of voltage comparator 301
Input terminal compared with device 303 connects, and the second output terminal of voltage comparator 301 is connected with the first end of varistor 302, pressure-sensitive electricity
The second end ground connection of resistance 302, the first output terminal of voltage comparator 303 are connected with the input terminal of attenuator circuit 304, attenuator circuit
304 output terminal is connected with the first input end of regulator circuit 306, the second output terminal and amplifying circuit of voltage comparator 303
305 input terminal connection, the output terminal of amplifying circuit 305 are connected with the second input terminal of regulator circuit 306, voltage comparator
303 the 3rd output terminal is connected with the 3rd input terminal of regulator circuit 306.
Voltage comparator 301, when key switch acts, receives target voltage signal, by the amplitude of target voltage signal
Compared with the first preset value (such as 36V), it is more than the first preset value (such as 36V), and target in the amplitude of target voltage signal
When the duration of voltage signal is less than the first preset duration (such as 1s), second channel conducting, mesh is exported by the second output terminal
Voltage signal is marked to varistor 302, is less than or equal to the first preset value (such as 36V), and mesh in the amplitude of target voltage signal
The duration of mark voltage signal is more than the second preset duration (such as 2s), and first passage conducting, mesh is exported by the first output terminal
Voltage signal is marked to voltage comparator 303.
It should be noted that if the amplitude of target voltage signal is more than the first preset value, and target voltage signal continues
Time is less than the first preset duration, then after showing target voltage signal for key switch power-off, targeted loads moment produces anti-
To electromotive force.Varistor 302, inverse electromotive force is discharged, and the inverse electromotive force of release flows directly into storage battery anode, keeps away
The interference to vehicle electrical equipment is exempted from.
Voltage comparator 303, by the amplitude of target voltage signal and the second preset value (such as 32V) and the 3rd preset value (such as
9V) compare, when the amplitude of target voltage signal is more than the second preset value (such as 32V), first passage conducting, passes through the first output
End output target voltage signal is to attenuator circuit 304, when the amplitude of target voltage signal is less than the 3rd preset value (such as 9V), the
Two channel conductives, target voltage signal is exported to amplifying circuit 305 by the second output terminal, big in the amplitude of target voltage signal
In or equal to the 3rd preset value (such as 9V), also, the amplitude of target voltage signal is less than or equal to the second preset value (such as 32V)
When, third channel conducting, target voltage signal is exported to regulator circuit 306 by the 3rd output terminal.
Attenuator circuit 304, the target voltage signal for being more than the second preset value (such as 32V) to amplitude are carried out at decay
Reason, exports the voltage signal of default amplitude (such as 24V) to regulator circuit 306.In addition, attenuator circuit can also be more than second to amplitude
The target voltage signal of preset value is filtered processing, filters out the burr in target voltage signal.
Amplifying circuit 305, the target voltage signal for being less than the 3rd preset value (such as 9V) to amplitude are amplified processing,
The voltage signal of the default amplitude (such as 24V) of output is to regulator circuit 306.In addition, amplifying circuit 305 can also be less than the 3rd to amplitude
The target voltage signal of preset value is filtered processing, filters out the burr in target voltage signal.
Regulator circuit 306, the voltage letter that receiving attenuation circuit 304, amplifying circuit 305 or voltage comparator 303 export
Number, voltage stabilizing processing is carried out to the voltage signal of attenuator circuit 304, amplifying circuit 305 or voltage comparator 303 output, and it is defeated
Go out the voltage signal after voltage stabilizing processing to the T15 stitch of electronic control unit.
In the protective device of electronic control unit provided in an embodiment of the present invention, the voltage comparator in voltage protection circuit
The target voltage signal of input can be identified, the targeted loads after identifying target voltage signal for key switch power-off
During the reverse induction electromotive force that moment produces, the inverse electromotive force can be discharged by varistor, so as to avoid anti-
The T15 stitch of electronic control unit is input to induced electromotive force, realize it is permanent to the T15 stitch of electronic control unit, have
The protection of effect ground.In addition, the protective device of electronic control unit provided in an embodiment of the present invention passes through voltage comparator, amplification electricity
Road, attenuator circuit and regulator circuit will input the voltage stabilization to T15 stitch in electronic control unit normal range of operation, keep away
Having exempted from the fluctuation of input voltage causes electronic control unit T15 stitch voltage fluctuations, then causes ECU to reset, influences engine
Operation.The protective device of electronic control unit provided in an embodiment of the present invention, circuit design is simple, and reliability is high, non-maintaining.
Above-described embodiment provide electronic control unit protective device in, voltage protection circuit, signal processing circuit and
Regulator circuit is packaged on pcb board, using technical grade manufacturing process, meets that vehicle vibration, burn into high temperature, electromagnetic interference etc. refer to
Mark requires, and it is IP65 that waterproof, which puts dirt grade,.
The protective device for the electronic control unit that above-described embodiment provides can also include：Package casing.Voltage protection electricity
Road, signal processing circuit and regulator circuit are arranged in package casing, and signal is provided with package casing and moves towards mark, is facilitated whole
Car is installed.
The first end of the protective device for the electronic control unit that above-described embodiment provides passes through plug connector form and the key
Spoon switch connection, the second end of the protective device of electronic control unit pass through plug connector form and the T15 pins of electronic control unit
Foot connects.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
In several embodiments provided herein, it should be understood that disclosed method, apparatus and equipment, can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Division, is only a kind of division of logic function, can there is other dividing mode, such as multiple units or component when actually realizing
Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be by some communication interfaces, between device or unit
Coupling or communication connection are connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.In addition, each functional unit in each embodiment of the present invention can be integrated in it is in a processing unit or each
Unit is individually physically present, can also two or more units integrate in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment the method for the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (10)
- A kind of 1. protective device of electronic control unit, it is characterised in that including：Voltage protection circuit；The voltage protection circuit is connected between key switch and the electronic control unit, is acted in the key switch When, target voltage signal is received, determines whether the target voltage signal is the inverse electromotive force produced targeted loads moment, When the target voltage signal is the inverse electromotive force that the targeted loads moment produces, the target voltage signal is discharged Go.
- 2. the protective device of electronic control unit according to claim 1, it is characterised in that further include：Signal processing electricity Road and regulator circuit；The input terminal of the voltage protection circuit is connected with the key switch, the output terminal of the voltage protection circuit with it is described The input terminal connection of signal processing circuit, the output terminal of the signal processing circuit are connected with the input terminal of the regulator circuit, The output terminal of the regulator circuit is connected with the T15 stitch of the electronic control unit；The voltage protection circuit, in the inverse electromotive force that the target voltage signal does not produce for the targeted loads moment When, the target voltage signal is exported to the signal processing circuit；The signal processing circuit, receives the target voltage signal of the voltage protection circuit output, based on the target The amplitude of voltage signal judges whether to need to carry out attenuation processing or enhanced processing to the target voltage signal, if so, then right The target voltage signal carries out attenuation processing or enhanced processing, and the voltage signal after processing is exported to voltage stabilizing electricity Road, otherwise, directly exports the target voltage signal to the regulator circuit；The regulator circuit, receives the voltage signal of the signal processing circuit output, to signal processing circuit output Voltage signal carries out voltage stabilizing processing, and exports the voltage signal after voltage stabilizing processing to the T15 stitch of the electronic control unit.
- 3. the protective device of electronic control unit according to claim 2, it is characterised in that the voltage protection circuit, Including：Voltage comparison unit and voltage releasing unit；The voltage comparison unit, by the amplitude of the target voltage signal compared with the first preset value, in the target The amplitude of voltage signal is more than first preset value, and the duration of the target voltage signal is less than the first preset duration When, the target voltage signal is exported to the voltage releasing unit, is less than or waits in the amplitude of the target voltage signal In first preset value, and when the duration of the target voltage signal is more than the second preset duration, by target electricity Signal output is pressed to the signal processing circuit；The voltage releasing unit, for the target voltage signal to be discharged.
- 4. the protective device of electronic control unit according to claim 3, it is characterised in that the voltage comparison unit is Voltage comparator, the voltage releasing unit are varistor；The input terminal of the voltage comparator is connected with the key switch, the first output terminal of the voltage comparator with it is described The input terminal connection of signal processing circuit, the second output terminal of the voltage comparator connect with the first end of the varistor Connect, the second end ground connection of the varistor；The voltage comparator, by the amplitude of the target voltage signal compared with the first preset value, in target electricity The amplitude of pressure signal is more than first preset value, and when the duration of the target voltage signal is less than described first and presets When long, second channel conducting, exports the target voltage signal to the varistor, described by second output terminal The amplitude of target voltage signal is less than or equal to first preset value, and the duration of the target voltage signal is more than the During two preset durations, first passage conducting, is exported at the target voltage signal to the signal by first output terminal Manage circuit；The varistor, the target voltage signal that second output terminal of the voltage comparator exports is discharged Go.
- 5. the protective device of electronic control unit according to claim 2, it is characterised in that the signal processing circuit bag Include：Voltage comparison unit and signal processing unit；The voltage comparison unit, by the amplitude of the target voltage signal compared with the second preset value and the 3rd preset value, The amplitude of the target voltage signal is more than second preset value, alternatively, the amplitude of the target voltage signal is less than described During three preset values, the target voltage signal is exported to the signal processing unit, in the width of the target voltage signal Value is greater than or equal to the 3rd preset value, also, the amplitude of the target voltage signal is less than or equal to described second and presets During value, the target voltage signal is exported to the regulator circuit；The signal processing unit, carries out attenuation processing or enhanced processing, by the target voltage to the target voltage signal Signal processing exports the voltage signal of the default amplitude to the regulator circuit into the voltage signal of default amplitude, wherein, The default amplitude is more than the 3rd preset value and is less than second preset value.
- 6. the protective device of electronic control unit according to claim 5, it is characterised in that the voltage comparison unit is Voltage comparator, the signal processing unit include：Attenuator circuit and amplifying circuit；The input terminal of the voltage comparator is connected with the output terminal of the voltage protection circuit, and the first of the voltage comparator Output terminal is connected with the input terminal of the attenuator circuit, the first input of the output terminal of the attenuator circuit and the regulator circuit End connection, the second output terminal of the voltage comparator is connected with the input terminal of the amplifying circuit, the amplifying circuit it is defeated Outlet is connected with the second input terminal of the regulator circuit, the 3rd output terminal and the regulator circuit of the voltage comparator 3rd input terminal connects；The voltage comparator, by the amplitude of the target voltage signal compared with the second preset value and the 3rd preset value, in institute When stating the amplitude of target voltage signal and being more than the second preset value, first passage conducting, by described in first output terminal output Target voltage signal is to the attenuator circuit, when the amplitude of the target voltage signal is less than three preset value, second Channel conductive, exports the target voltage signal to the amplifying circuit, in the target voltage by second output terminal The amplitude of signal is greater than or equal to the 3rd preset value, also, the amplitude of the target voltage signal is less than or equal to described During the second preset value, third channel conducting, the target voltage signal is exported to voltage stabilizing electricity by the 3rd output terminal Road；The attenuator circuit, the target voltage signal for being more than second preset value to amplitude carry out attenuation processing, The voltage signal of the default amplitude is exported to the regulator circuit；The amplifying circuit, the target voltage signal for being less than the 3rd preset value to amplitude are amplified processing, The voltage signal of the default amplitude is exported to the regulator circuit.
- 7. the protective device of electronic control unit according to claim 6, it is characterised in that the attenuator circuit, is also used Processing is filtered in the target voltage signal for being more than second preset value to amplitude；The amplifying circuit, the target voltage signal for being additionally operable to be less than amplitude the 3rd preset value are filtered place Reason.
- 8. the protective device of electronic control unit as claimed in any of claims 2 to 6, it is characterised in that described Voltage protection circuit, signal processing circuit and regulator circuit are packaged on pcb board.
- 9. the protective device of electronic control unit as claimed in any of claims 2 to 6, it is characterised in that described The protective device of electronic control unit further includes：Package casing；The voltage protection circuit, the signal processing circuit and the regulator circuit are arranged in the package casing, described Signal is provided with package casing and moves towards mark.
- 10. the protective device of electronic control unit as claimed in any of claims 1 to 7, it is characterised in that described The first end of the protective device of electronic control unit is connected by plug connector form with the key switch, and the electronic control is single The second end of the protective device of member is connected by plug connector form with the T15 stitch of the electronic control unit.
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| CN201711454907.5A CN107910859B (en) | 2017-12-28 | 2017-12-28 | Protection device of electronic control unit |
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| CN201711454907.5A CN107910859B (en) | 2017-12-28 | 2017-12-28 | Protection device of electronic control unit |
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| CN107910859B (en) | 2024-05-17 |
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