CN108173422A - The anti-point sparking reset circuit of vehicular data acquisition box - Google Patents
The anti-point sparking reset circuit of vehicular data acquisition box Download PDFInfo
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- CN108173422A CN108173422A CN201810070337.8A CN201810070337A CN108173422A CN 108173422 A CN108173422 A CN 108173422A CN 201810070337 A CN201810070337 A CN 201810070337A CN 108173422 A CN108173422 A CN 108173422A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 111
- 239000003990 capacitor Substances 0.000 claims description 23
- 230000001052 transient effect Effects 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 14
- 230000006641 stabilisation Effects 0.000 claims description 10
- 238000011105 stabilization Methods 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 description 3
- 235000008434 ginseng Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
-
- 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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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of anti-point sparking reset circuit of vehicular data acquisition box, the anti-point sparking reset circuit of vehicular data acquisition box includes：Power conversion module, Enable Pin power supply circuit, power supply conversion Enable Pin lock circuit and microcontroller；Automobile storage battery power supply is carried out voltage conversion by the power conversion module, and power supply is provided for vehicular data acquisition box；It strikes sparks in automobile, the power supply conversion Enable Pin locks circuit and locks the level voltage of the Enable Pin of the power conversion module；Prevent the automobile storage battery power supply output low pressure from restart the power conversion module reset；The microcontroller locks circuit to power supply conversion Enable Pin and carries out locked control.The anti-point sparking reset circuit of vehicular data acquisition box provided in an embodiment of the present invention, which realizes, locks the Enable Pin of the power conversion module, and the reset of power supply and automobile storage battery excessive loss is avoided by Enable Pin power supply circuit when preventing the automobile from striking sparks.
Description
Technical field
The present invention relates to the anti-point sparkings of technical field of automotive electronics more particularly to a kind of vehicular data acquisition box to reset electricity
Road.
Background technology
Automobile collecting cassette is mainly used as the modules power supply that input power is the automobile collecting cassette by automobile storage battery,
And pass through the system power supply power supply that automobile power level is converted to automobile collecting cassette by supply voltage conversion chip.Due to the electricity
The enabled voltage of the Enable Pin of source conversion chip also is divided to obtain by the automobile storage battery power supply.So as to strike sparks in automobile
There is the low level of moment in moment, storage battery, the low level can by the enabled voltage pull-down of the Enable Pin of power conversion chip, from
And the power conversion chip is caused to occur restarting phenomenon, power conversion chip restarts the weight for leading to vehicular data acquisition box
It opens, makes the vehicular data acquisition box work abnormal.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose a kind of anti-point sparking reset circuit of vehicular data acquisition box.
To achieve the above object, the anti-point sparking reset circuit of vehicular data acquisition box according to embodiments of the present invention, it is described
The anti-point sparking reset circuit of vehicular data acquisition box includes：
Power supply conversion Enable Pin locks circuit, and the power supply conversion Enable Pin locks circuit when automobile is struck sparks by the electricity
The level voltage of the Enable Pin of source modular converter locks；Prevent the automobile storage battery power supply output low pressure from making the power supply modulus of conversion
Block reset is restarted；
Enable Pin power supply circuit, the enabled power supply circuit divide, and be institute automobile storage battery power supply output
It states power conversion module Enable Pin and operating voltage is provided, the operating voltage is in automobile storage battery power supply output less than setting value
When so that the power conversion module stops the conversion of power supply.
Automobile storage battery power supply is carried out voltage conversion, is adopted for car data by power conversion module, the power conversion module
Collect box and power supply is provided；
Microcontroller, the microcontroller lock circuit to power supply conversion Enable Pin and carry out locked control.
According to one embodiment of present invention, power supply conversion Enable Pin locks circuit and includes triode Q1, resistance R4
With resistance R3；
Described resistance R4 one end is connect with a control terminal of the microcontroller, the resistance R4 other ends and the triode
The base stage connection of Q1, the one end of the base stage of the triode Q1 also with the resistance R3 connects, the other end of the resistance R3 and
Reference ground connects；The emitter of the triode Q1 is connect with the first power supply, collector and the power supply of the triode Q1
The Enable Pin connection of modular converter.
According to one embodiment of present invention, the Enable Pin power supply circuit includes resistance R1 and resistance R2；
Described resistance R1 one end is connect with the battery power output terminal, the other end of the resistance R1 and the resistance R2
One end connection, the other end of the resistance R2 connect with reference ground, the resistance R1, the common end of resistance R2 and the power supply
The Enable Pin connection of modular converter.
According to one embodiment of present invention, the power supply conversion Enable Pin locks circuit and further includes one-way conduction diode
D11；
The one-way conduction diode D11 anodes are connect with the collector of the triode Q1, two pole of one-way conduction
Pipe D11 cathodes are connect with the Enable Pin of the power conversion module；
The one-way conduction diode D11 makes the microcontroller and the power supply convert between Enable Pin locks circuit and carry out
One-way conduction；
According to one embodiment of present invention, the power lock dead circuit further includes stabilization filter capacitor C45；
Described stabilization filter capacitor C45 one end is connect with power supply conversion Enable Pin, the stabilization filter capacitor
The C45 other ends are connect with the reference ground；
According to one embodiment of present invention, the power lock dead circuit further includes signal holding capacitor C37；
Described signal holding capacitor C37 one end is connect with described one end of the resistance R4, the signal holding capacitor C37
The other end is connect with reference ground.
According to one embodiment of present invention, automobile storage battery transient absorption circuit is further included；
The transient absorption circuit includes diode D1, transient supression diode DV1 and capacitance C1；
The anode of the diode D1 is connect with the automobile storage battery power output end, the cathode difference of the diode D1
It is connect with described transient supression diode DV1 one end, one end of capacitance C1 and the power input of the power conversion module, institute
The other end and reference for stating transient supression diode DV1 connect, and the other end of the capacitance C1 is connect with reference ground；
According to one embodiment of present invention, the power conversion module includes DC-DC conversion control circuits, reduction voltage circuit
And filter circuit；The DC-DC conversion control circuits are connect with the reduction voltage circuit, the reduction voltage circuit and the filter circuit
Connection.
According to one embodiment of present invention, the DC-DC conversion control circuits include switch controller of power supply U1；
The reduction voltage circuit includes diode D2, inductance L1, capacitance C2, resistance R5 and resistance R6；The diode D2's
Cathode is connect with the conversion output of the switch controller of power supply U1, and the anode of the diode D2 is connect with reference ground, institute
The one end for stating inductance L1 is connect with the conversion output of the switch controller of power supply U1, the other end and resistance of the inductance L1
One end connection of R5, the other end of the resistance R5 are connect with one end of the resistance R6, the other end and ginseng of the resistance R6
It connects with examining；
The filter circuit includes filter circuit C2, and described filter capacitor C2 one end and described one end of the resistance R5 connect
It connects.
The anti-point sparking reset circuit of vehicular data acquisition box provided in an embodiment of the present invention, by power lock dead circuit by institute
It states power conversion module to lock the Enable Pin of automobile when automobile is struck sparks, avoid due to caused low level when automobile is struck sparks,
So that the reset of power conversion module and lead to restarting or shutting down for electronic equipment, ensure the electronic equipments such as automobile collecting cassette
Normal operation by Enable Pin power supply circuit in automobile storage battery brownout, stops the conversion of the power conversion module, keeps away
Exempt from, when automobile storage battery output voltage is too low, further to consume the electric energy of the automobile storage battery, avoid automobile storage battery excessive loss.
Ensure the service life of automobile storage battery.
Description of the drawings
Fig. 1 is the anti-point sparking reset circuit structure diagram of vehicular data acquisition box provided in an embodiment of the present invention；
Fig. 2 for power supply provided in an embodiment of the present invention convert Enable Pin lock circuit, automobile storage battery transient absorption circuit and
Power conversion module electrical block diagram；
Fig. 3 is one-chip computer module structure diagram provided in an embodiment of the present invention.
Reference numeral：
Microcontroller 10；
Power supply conversion Enable Pin locks circuit 20；
Power conversion module 30；
DC-DC conversion control circuits 301；
Reduction voltage circuit 302；
Filter circuit 303；
Automobile storage battery transient absorption circuit 40.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the present invention program, below in conjunction in the embodiment of the present invention
The technical solution in the embodiment of the present invention is clearly and completely described in attached drawing.Unless otherwise defined, it is used herein
All technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.Herein
Used term is intended merely to the purpose of description specific embodiment in the description of the invention, it is not intended that in limitation originally
Invention.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
Containing at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Refering to Fig. 1, Fig. 1 is the anti-point sparking reset circuit structural representation of vehicular data acquisition box provided in an embodiment of the present invention
Figure.
The anti-point sparking reset circuit of vehicular data acquisition box includes：Power supply conversion Enable Pin locks circuit 20, enables
Hold power supply circuit 50, power conversion module 30 and microcontroller 10；The power supply conversion Enable Pin locks circuit 20 and strikes sparks in automobile
When the level voltage of the Enable Pin of the power conversion module 30 is locked；Prevent the automobile storage battery power supply output low pressure from making institute
The reset of power conversion module 30 is stated to restart；The enabled power supply circuit divides, and be automobile storage battery power supply output
The power conversion module Enable Pin provides operating voltage, and the operating voltage is in automobile storage battery power supply output less than setting
During value so that the power conversion module stops the conversion of power supply.The power conversion module 30 carries out automobile storage battery power supply
Voltage is converted, and power supply is provided for vehicular data acquisition box；The microcontroller 10 locks electricity to power supply conversion Enable Pin
Road 20 carries out locked control.
Specifically, automobile, in sparking, the voltage value of automobile storage battery output will appear fluctuation, and the voltage value of the fluctuation can
Output voltage can be caused low and high level occur, enable and bring out so as to cause the power input and power supply of power conversion module 30
Existing fluctuation voltage, the fluctuation voltage cause the power conversion module 30 to be restarted.In addition, automobile storage battery is using electric energy
Loss may result in the loss of storage battery.The loss of automobile storage battery can cause the reduction of storage battery output voltage, the embodiment of the present invention
Enable Pin is converted by the power supply and locks circuit 20 when automobile is struck sparks, by the electricity of the Enable Pin of the power conversion module 30
Ordinary telegram pressure is locked.For example, the high level that output is constant.The Enable Pin of the power conversion module 30 is avoided fluctuation voltage occur.
So as to which the power conversion module 30 be avoided to restart.In addition, the enabled power supply circuit automobile storage battery power supply is exported into
Row partial pressure, and operating voltage is provided for 30 Enable Pin of power conversion module, the operating voltage is in automobile storage battery electricity
When source output is less than setting value so that the power conversion module 30 stops the conversion of power supply.That is, when automobile electricity
When bottle electric power output voltage is relatively low, then it represents that the automobile storage battery power supply will be depleted.At this point, the car data is adopted
Collection box is powered off and is stopped, to avoid further by the automobile storage battery electrical source consumption, the service life of automobile storage battery is reduced, at this
In inventive embodiments, the output of automobile storage battery power supply is divided by the enabled power supply circuit, when automobile storage battery electricity
When source output is relatively low, the voltage after the enabled power supply circuit partial pressure can not meet 30 Enable Pin of power conversion module most
Low-voltage.At this point, the power conversion module 30 stops voltage conversion.So as to avoid further consuming the electricity of the automobile storage battery
Energy.
The anti-point sparking reset circuit of vehicular data acquisition box provided in an embodiment of the present invention, by power lock dead circuit by institute
It states power conversion module 30 to lock the Enable Pin of automobile when automobile is struck sparks, avoid due to low electricity caused when automobile is struck sparks
It is flat so that the reset of power conversion module 30 and lead to restarting or shutting down for electronic equipment, ensure the electronics such as automobile collecting cassette
The normal operation of equipment by Enable Pin power supply circuit in automobile storage battery brownout, stops the power conversion module 30
Conversion, avoid, when automobile storage battery output voltage is too low, further consuming the electric energy of the automobile storage battery, avoiding automobile storage battery
Excessive loss.Ensure the service life of automobile storage battery.
Referring to Fig.2, Fig. 2 converts Enable Pin for power supply provided in an embodiment of the present invention locks circuit 20, automobile storage battery transient state
30 electrical block diagram of absorbing circuit 40 and power conversion module.
Further, in one embodiment of the invention, power supply conversion Enable Pin locks circuit 20 and includes three poles
Pipe Q1, resistance R4 and resistance R3；Described resistance R4 one end is connect with a control terminal of the microcontroller 10, and the resistance R4 is another
End is connect with the base stage of the triode Q1, and the one end of the base stage of the triode Q1 also with the resistance R3 is connect, the electricity
The other end of resistance R3 is connect with reference ground；The emitter of the triode Q1 is connect with the first power supply, the collection of the triode Q1
Electrode is connect with the Enable Pin of the power conversion module 30；The triode Q1 is PNP transistor.
Specifically, the control terminal output control level of the microcontroller 10, when the control level is low level
When, mutual conduction between the collector and emitter of the triode Q1 so that the Enable Pin of the power conversion module 30/
SHDN is constant high level, so as to prevent control terminal/SHDN of the power conversion module 30 due to automobile is struck sparks when power it is low
Level and the power conversion module 30 is caused to be restarted.
In the embodiment of the present invention, power supply power control switch is formed by the triode Q1, resistance R4 and resistance R3, it is right
Control terminal/SHDN of the power conversion module 30 is locked, and power supply low level leads to power conversion module when preventing the automobile from striking sparks
30 restart, circuit simple and stable.
Further, in one embodiment of the invention, the power supply conversion Enable Pin locks circuit 20 and further includes：Make
Energy end power supply circuit, the Enable Pin power supply circuit include resistance R1 and resistance R2；Described resistance R1 one end and storage battery electricity
Source output terminal connects, and the other end of the resistance R1 is connect with one end of the resistance R2, the other end and ginseng of the resistance R2
Connect with examining, the resistance R1, resistance R2 common end connect with the Enable Pin of the power conversion module.
Specifically, the Enable Pin power supply circuit provides enabled level for the Enable Pin of the power conversion module 30, make
The power conversion module works normally and carries out the supply voltage conversion.
Further, in one embodiment of the invention, the power supply conversion Enable Pin locks circuit 20 and further includes list
To conducting diode D11；The one-way conduction diode D11 anodes are connect with the collector of the triode Q1, described unidirectional
Conducting diode D11 cathodes are connect with the Enable Pin of the power conversion module 30；The one-way conduction diode D11 makes described
Microcontroller 10 and power supply conversion Enable Pin carry out one-way conduction between locking circuit 20.So as to prevent automobile power source to automobile
The interference of data acquisition box power supply.
Further, in one embodiment of the invention, the power lock dead circuit further includes stabilization filter capacitor
C45；Described stabilization filter capacitor C45 one end is connect with power supply conversion Enable Pin, and the stabilization filter capacitor C45 is another
One end is connect with the reference ground；The stabilization filter capacitor C45 prevents automobile power source from shaking, and leads to the power supply
Modular converter 30 occurs restarting reset.
Further, in one embodiment of the invention, the power lock dead circuit also signal holding capacitor C37；Institute
Described one end that signal holding capacitor C37 one end is stated with the resistance R4 is connect, the signal holding capacitor C37 other ends and ginseng
It connects with examining.
Further, in one embodiment of the invention, automobile storage battery transient absorption circuit 40 is further included；The transient state
Absorbing circuit includes diode D1, transient supression diode DV1 and capacitance C1；The anode of the diode D1 and automobile electricity
Bottle power output end connection, the cathode of the diode D1 respectively with described transient supression diode DV1 one end, capacitance C1 one
The connection of the power input of end and the power conversion module 30, the other end and the reference of the transient supression diode DV1 connect
It connects, the other end of the capacitance C1 is connect with reference ground.
Specifically, forming transient absorption circuit by the diode D1, transient supression diode DV1 and capacitance C1, prevent
There is spike or inhibits high pressure in output voltage.
Further, in one embodiment of the invention, according to one embodiment of present invention, the power supply modulus of conversion
Block includes DC-DC conversion control circuits 301, reduction voltage circuit 302 and filter circuit 303；The DC-DC conversion control circuits 301
It is connect with the reduction voltage circuit 302, the reduction voltage circuit 302 is connect with the filter circuit 303.
With continued reference to Fig. 2, in one embodiment of the invention, the DC-DC conversion control circuits 301 turn including power supply
Changer controller U1；The reduction voltage circuit 302 includes diode D2, inductance L1, capacitance C2, resistance R5 and resistance R6；Two pole
The cathode of pipe D2 is connect with the conversion output of the switch controller of power supply U1, and anode and the reference ground of the diode D2 connect
It connects, one end of the inductance L1 is connect with the conversion output of the switch controller of power supply U1, the other end of the inductance L1
It is connect with one end of resistance R5, the other end of the resistance R5 is connect with one end of the resistance R6, and the resistance R6's is another
End is connect with reference ground；The filter circuit 303 includes filter capacitor C2, and described filter capacitor C2 one end is with the resistance R5's
One end connection.
The diode D2, inductance L1, capacitance C2 form power voltage step down and filter circuit；The resistance R5 and resistance R6 strings
Voltage branch circuit is unified into, the power supply conversion and control is fed back to after the output voltage of the switch controller of power supply U1 is divided
The pressure feedback port of device U1.
It these are only the embodiment of the present invention, the scope of the claims of the present invention be not intended to limit, although with reference to the foregoing embodiments
The present invention is described in detail, it, still can be to aforementioned each specific reality for those skilled in the art comes
The technical solution recorded in mode is applied to modify or carry out equivalence replacement to which part technical characteristic.It is every to utilize this
The equivalent structure that description of the invention and accompanying drawing content are done directly or indirectly is used in other related technical areas, similarly
Within scope of patent protection of the present invention.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in combine in an appropriate manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art are not departing from the principle of the present invention and objective
In the case of can make changes, modifications, substitutions and variations to the above described embodiments within the scope of the invention.
Claims (9)
1. a kind of anti-point sparking reset circuit of vehicular data acquisition box, which is characterized in that the anti-point of vehicular data acquisition box is beaten
Fiery reset circuit includes：
Power supply conversion Enable Pin locks circuit, and the power supply conversion Enable Pin locks circuit and turns the power supply when automobile is struck sparks
The level voltage for changing the mold the Enable Pin of block locks；Prevent the automobile storage battery power supply output low pressure from answer the power conversion module
Restart position；
Enable Pin power supply circuit, the enabled power supply circuit divide automobile storage battery power supply output, and are the electricity
Source modular converter Enable Pin provides operating voltage, the operating voltage when automobile storage battery power supply output is less than setting value,
So that the power conversion module stops the conversion of power supply.
Automobile storage battery power supply is carried out voltage conversion by power conversion module, the power conversion module, is vehicular data acquisition box
Power supply is provided；
Microcontroller, the microcontroller lock circuit to power supply conversion Enable Pin and carry out locked control.
2. the anti-point sparking reset circuit of vehicular data acquisition box according to claim 1, which is characterized in that the power supply turns
Change Enable Pin lock circuit include triode Q1, resistance R4 and resistance R3；
Described resistance R4 one end is connect with a control terminal of the microcontroller, and the resistance R4 other ends are with the triode Q1's
Base stage connects, and the one end of the base stage of the triode Q1 also with the resistance R3 is connect, the other end of the resistance R3 and reference
Ground connects；The emitter of the triode Q1 is connect with the first power supply, and collector and the power supply of the triode Q1 are converted
The Enable Pin connection of module.
3. the anti-point sparking reset circuit of vehicular data acquisition box according to claim 2, which is characterized in that the Enable Pin
Power supply circuit includes resistance R1 and resistance R2；
Described resistance R1 one end is connect with the battery power output terminal, the other end of the resistance R1 and the one of the resistance R2
End connection, the other end of the resistance R2 are connect with reference ground, common end and the power supply conversion of the resistance R1, resistance R2
The Enable Pin connection of module.
4. the anti-point sparking reset circuit of vehicular data acquisition box according to claim 3, which is characterized in that the power supply turns
It changes Enable Pin and locks circuit and further include one-way conduction diode D11；
The one-way conduction diode D11 anodes are connect with the collector of the triode Q1, the one-way conduction diode D11
Cathode is connect with the Enable Pin of the power conversion module；
The one-way conduction diode D11 makes the microcontroller and the power supply convert between Enable Pin locks circuit and carry out unidirectionally
Conducting.
5. the anti-point sparking reset circuit of vehicular data acquisition box according to claim 1, which is characterized in that the power lock
Dead circuit further includes stabilization filter capacitor C45；
Described stabilization filter capacitor C45 one end is connect with power supply conversion Enable Pin, and the stabilization filter capacitor C45 is another
One end is connect with the reference ground.
6. the anti-point sparking reset circuit of vehicular data acquisition box according to claim 1, which is characterized in that the power lock
Dead circuit further includes signal holding capacitor C37；
Described signal holding capacitor C37 one end is connect with described one end of the resistance R4, and the signal holding capacitor C37 is another
End is connect with reference ground.
7. the anti-point sparking reset circuit of vehicular data acquisition box according to claim 1, which is characterized in that further include automobile
Storage battery transient absorption circuit；
The transient absorption circuit includes diode D1, transient supression diode DV1 and capacitance C1；
The anode of the diode D1 is connect with the automobile storage battery power output end, the cathode of the diode D1 respectively with institute
State the power input connection of transient supression diode DV1 one end, one end of capacitance C1 and the power conversion module, the wink
Become the other end for inhibiting diode DV1 and reference connects, the other end of the capacitance C1 is connect with reference ground.
8. the anti-point sparking reset circuit of vehicular data acquisition box according to claim 1, which is characterized in that the power supply turns
It changes the mold block and includes DC-DC conversion control circuits, reduction voltage circuit and filter circuit；The DC-DC conversion control circuits and the drop
Volt circuit connects, and the reduction voltage circuit is connect with the filter circuit.
9. the anti-point sparking reset circuit of vehicular data acquisition box according to claim 8, which is characterized in that the DC-DC
Conversion control circuit includes switch controller of power supply U1；The reduction voltage circuit includes diode D2, inductance L1, capacitance C2, resistance
R5 and resistance R6；The cathode of the diode D2 is connect with the conversion output of the switch controller of power supply U1, two pole
The anode of pipe D2 is connect with reference ground, and one end of the inductance L1 and the conversion output of the switch controller of power supply U1 connect
It connects, the other end of the inductance L1 is connect with one end of resistance R5, one end of the other end of the resistance R5 and the resistance R6
Connection, the other end of the resistance R6 are connect with reference ground；
The filter circuit includes filter circuit C2, and described filter capacitor C2 one end is connect with described one end of the resistance R5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070337.8A CN108173422B (en) | 2018-01-24 | 2018-01-24 | Ignition-prevention reset circuit of automobile data acquisition box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070337.8A CN108173422B (en) | 2018-01-24 | 2018-01-24 | Ignition-prevention reset circuit of automobile data acquisition box |
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| CN108173422A true CN108173422A (en) | 2018-06-15 |
| CN108173422B CN108173422B (en) | 2024-04-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358548A (en) * | 2018-10-31 | 2019-02-19 | 深圳市元征科技股份有限公司 | A kind of charging method of automotive diagnostic system, vehicle diagnosis and automotive diagnostic unit |
| CN110690880A (en) * | 2019-10-25 | 2020-01-14 | 东风电子科技股份有限公司 | Vehicle-mounted instrument circuit structure capable of realizing immediate starting after micro power-off of whole vehicle in extremely-low dark current sleep environment |
| WO2020042695A1 (en) * | 2018-08-29 | 2020-03-05 | 郑州云海信息技术有限公司 | Timing test method and device, and vr chip |
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| WO2020042695A1 (en) * | 2018-08-29 | 2020-03-05 | 郑州云海信息技术有限公司 | Timing test method and device, and vr chip |
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| CN110690880B (en) * | 2019-10-25 | 2021-11-26 | 东风电子科技股份有限公司 | Vehicle-mounted instrument circuit structure capable of realizing immediate starting after micro power-off of whole vehicle in extremely-low dark current sleep environment |
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