CN106985771A - A kind of onboard diagnostic device dormancy start-up circuit - Google Patents
A kind of onboard diagnostic device dormancy start-up circuit Download PDFInfo
- Publication number
- CN106985771A CN106985771A CN201710264561.6A CN201710264561A CN106985771A CN 106985771 A CN106985771 A CN 106985771A CN 201710264561 A CN201710264561 A CN 201710264561A CN 106985771 A CN106985771 A CN 106985771A
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- modular converter
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- 230000005059 dormancy Effects 0.000 title claims abstract description 38
- 238000001914 filtration Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 9
- 230000000284 resting effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007958 sleep Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
Classifications
-
- 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
- B60R16/023—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 transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The embodiment of the invention discloses a kind of onboard diagnostic device dormancy start-up circuit, including：Battery voltage adjustment module, its input connects the positive pole of automobile storage battery, output end connects the input of level signal modular converter, for when the voltage that automobile storage battery is exported is more than or equal to the first predeterminated voltage, the voltage step-down that automobile storage battery is exported is exported to predeterminated voltage after interval by the output end of battery voltage adjustment module, when the voltage that automobile storage battery is exported is less than the first predeterminated voltage, the output voltage of battery voltage adjustment module is zero；Level signal modular converter, its output end connects the dormancy awakening terminal of onboard diagnostic device, for when the voltage that its input is inputted is more than or equal to the second predeterminated voltage, its output end exports logic low, when the voltage that its input is inputted is less than the second predeterminated voltage, its output end output logic high.The technical scheme of the embodiment of the present invention, it is possible to achieve reduce the effect of the dormancy power consumption of onboard diagnostic device.
Description
Technical field
The present embodiments relate to automobile diagnosis technique, more particularly to a kind of onboard diagnostic device dormancy start-up circuit.
Background technology
OBD (On-Board Diagnostic, OBD) equipment is to be loaded in automobile OBD interfaces, often electric by OBD
Interface is powered, obtain vehicle status data, and by data be sent to by way of wired or radio communication mobile phone or its
A kind of device that his visualisation platforms are shown.
OBD interfaces on automobile are connected with automobile storage battery, have electricity output in car engine and flame-out period.At present,
A part of OBD equipment of industry can enter resting state, can be from resting state automatically into normal work after car engine
State, industry is typically using active device or using the park mode of high power consumption.
Using active device or using the park mode of high power consumption, the power consumption of its equipment is such as used generally in milliampere level
The special chip that tests the speed (such as global positioning system (Global Positioning System, GPS) tests the speed), active comparator
Or analog-digital converter (Analog-to-Digital Converter, ADC) sample detecting etc., OBD equipment is shown as in automobile
Flame-out period has higher quiescent dissipation, and dormancy start-up circuit cost is higher.
The content of the invention
The present invention provides a kind of onboard diagnostic device dormancy start-up circuit, to realize the dormancy power consumption for reducing OBD equipment.
The embodiments of the invention provide a kind of onboard diagnostic device dormancy start-up circuit, including：
Battery voltage adjustment module, its input connects the positive pole of automobile storage battery, output end connection level signal modulus of conversion
The input of block, for when the voltage that automobile storage battery is exported be more than or equal to the first predeterminated voltage when, the electricity that automobile storage battery is exported
Pressure drop is depressed into behind predeterminated voltage interval to be exported by the output end of battery voltage adjustment module, when the voltage that automobile storage battery is exported is less than
During the first predeterminated voltage, the output voltage of battery voltage adjustment module is zero；
Level signal modular converter, its output end connects the dormancy awakening terminal of onboard diagnostic device, for when its input
When the voltage of end input is more than or equal to the second predeterminated voltage, its output end output logic low, the electricity inputted when its input
When pressure is less than the second predeterminated voltage, its output end output logic high.
Further, battery voltage adjustment module includes voltage-regulator diode；
The negative pole of voltage-regulator diode is as the input of battery voltage adjustment module, and the positive pole of voltage-regulator diode is used as storage battery
The output end of VRM Voltage Regulator Module, wherein, the first predeterminated voltage is the burning voltage of voltage-regulator diode, the stabilization of voltage-regulator diode
Voltage is less than the nominal output voltage of automobile storage battery.
Further, level signal modular converter includes triode and resistance；
The colelctor electrode of triode is as the output end of level signal modular converter, and the base stage of triode is used as level signal to turn
The input of block is changed the mold, the colelctor electrode of triode connects voltage source by resistance, the emitter stage connection automobile storage battery of triode
Negative pole, wherein, the second predeterminated voltage is triode ON voltage.
Further, onboard diagnostic device dormancy start-up circuit also includes：
Voltage regulating module, is connected between battery voltage adjustment module and level signal modular converter, for adjust input to
The voltage of the input of level signal modular converter.
Further, voltage regulating module includes：The pressure regulation branch road being composed in series by least two impedors；
One end of pressure regulation branch road connects the output end of battery voltage adjustment module, and the other end connects the negative pole of automobile storage battery；
The common port of adjacent impedance element is used as divider node, at least one divider node connection level signal modular converter
Input.
Further, onboard diagnostic device dormancy start-up circuit also includes：
Filtration module, is connected between battery voltage adjustment module and level signal modular converter, for filtering out input extremely
AC influence signal in the voltage of the input of level signal modular converter.
Further, filtration module includes：Electric capacity, its one end connects the input of level signal modular converter, the other end
Connect the negative pole of automobile storage battery.
Further, onboard diagnostic device dormancy start-up circuit also includes：
Current limliting module, is connected between battery voltage adjustment module and level signal modular converter, for limiting input extremely
The electric current of the input of level signal modular converter.
Further, current limliting module includes at least one current-limiting resistance, is connected to battery voltage adjustment module and level letter
Between number modular converter.
Dormancy awakening signal of the invention by the way that the output voltage of storage battery during automobile starting to be converted to OBD equipment,
The problem of OBD device sleeps power consumptions are higher is solved, the effect for the dormancy power consumption for reducing OBD equipment is realized.
Brief description of the drawings
Fig. 1 is a kind of structural representation of onboard diagnostic device dormancy start-up circuit in the embodiment of the present invention one；
Fig. 2 is a kind of structural representation of onboard diagnostic device dormancy start-up circuit in the embodiment of the present invention two.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Fig. 1 is a kind of structural representation for onboard diagnostic device dormancy start-up circuit that the embodiment of the present invention one is provided, this
Embodiment is applicable to wake up the situation of OBD equipment in a dormant state, the onboard diagnostic device dormancy start-up circuit, bag
Include：
Battery voltage adjustment module 110, its input connects the positive pole of automobile storage battery 100, output end connection level signal
The input of modular converter 120, for when the voltage that automobile storage battery 100 is exported is more than or equal to the first predeterminated voltage, by automobile
The voltage step-down that storage battery 100 is exported is exported to predeterminated voltage after interval by the output end of battery voltage adjustment module 110, works as automobile
When the voltage that storage battery 100 is exported is less than the first predeterminated voltage, the output voltage of battery voltage adjustment module 110 is zero；
Level signal modular converter 120, its output end connects the dormancy awakening terminal of onboard diagnostic device, for when its is defeated
When the voltage for entering end input is more than or equal to the second predeterminated voltage, its output end output logic low is inputted when its input
When voltage is less than the second predeterminated voltage, its output end output logic high.
Wherein, the interval minimum value of predeterminated voltage is more than or equal to the second predeterminated voltage, and the first predeterminated voltage is less than automobile electricity
100 nominal output voltages of bottle, optionally, the first predeterminated voltage are the 80%-85% of the nominal output voltage of automobile storage battery 100.When
When the voltage that the automobile storage battery 100 that battery voltage adjustment module 110 is got is exported is more than or equal to the first predeterminated voltage, by automobile
The voltage step-down that storage battery 100 is exported to predeterminated voltage it is interval after export to level signal modular converter 120, now level signal turns
The voltage for changing the mold the input of the input of block 120 is more than or equal to the second predeterminated voltage, the output logic low electricity of level signal modular converter 120
Put down to the dormancy awakening terminal of OBD equipment；When the voltage for the automobile storage battery output that battery voltage adjustment module 110 is got is less than
During the first predeterminated voltage, high-impedance state is presented in the inside of battery voltage adjustment module 110, and its output voltage is zero, now level signal
The voltage of the input of modular converter 120 input is less than the second predeterminated voltage, the output logic high of level signal modular converter 120
To the dormancy awakening terminal of OBD equipment.When the dormancy awakening terminal of OBD equipment gets logic low to logic high
During level saltus step, OBD equipment is waken up, and wherein the dormancy awakening terminal of OBD equipment is the dormancy awakening pin of main control chip, electricity
The logic level of the main control chip for logic high and logic low the matching OBD equipment that flat signal conversion module 120 is exported.
Optionally, battery voltage, which adjusts 110 modules, includes voltage-regulator diode D1；
Voltage-regulator diode D1 negative pole is used as the input of battery voltage adjustment module 110, voltage-regulator diode D1 positive pole
As the output end of battery voltage adjustment module 110, wherein, the first predeterminated voltage is voltage-regulator diode D1 burning voltage, surely
Diode D1 burning voltage is pressed to be less than the nominal output voltage of automobile storage battery.Example, the onboard diagnostic device dormancy starts
When circuit configuration is on the vehicle of 12V automobile storage batteries, when automotive ignition starts, the output voltage of automobile storage battery 100 can be of short duration
Under drop down onto 6-8V this be interval, burning voltage can be selected in more than 8V below 12V voltage-regulator diode.
Optionally, level signal modular converter 120 includes triode Q1 and resistance R1；
Triode Q1 colelctor electrode is as the output end of level signal modular converter 120, and triode Q1 base stage is used as electricity
The input of flat signal conversion module 120, triode Q1 colelctor electrode by resistance R1 connection voltage source VCC, triode Q1's
Emitter stage connects the negative pole of automobile storage battery, wherein, the second predeterminated voltage is triode ON voltage.Wherein, voltage source VCC electricity
Press as the logic high of OBD equipment main control chips, triode Q1 is NPN type triode.Under automobile flameout state, automobile storage battery
100 output voltages are higher than the first predeterminated voltage, now input to the voltage of triode Q1 base stages and are higher than triode Q1 electric conduction
Pressure, the conducting of triode Q1 current collection best emitter stage, the voltage of triode Q1 colelctor electrode is logic low；When automotive ignition is opened
When dynamic, the output voltage of automobile storage battery 100 can of short duration whereabouts, the voltage now inputted to triode Q1 base stages is zero, triode
Q1 ends, and the voltage of triode Q1 colelctor electrode is identical with voltage source VCC voltage, that is, exports logic high to OBD equipment
Dormancy awakening terminal so that the OBD equipment under waking up resting state；After automobile starting, the cathode voltage of automobile storage battery 100 will
Can be equal to or more than automobile storage battery nominal output voltage (because automotive type is different, the cathode voltage of automobile storage battery 100 after automobile starting
Can be different), triode Q1 collector voltages return to logic low.
The technical scheme of the present embodiment, by the way that the output voltage of storage battery during automobile starting is converted into OBD equipment
Dormancy awakening signal, solves the problem of OBD device sleeps power consumptions are higher, realizes the effect for the dormancy power consumption for reducing OBD equipment.And
And, the onboard diagnostic device dormancy start-up circuit can use passive device, and space-consuming is few on a printed circuit board, cost
It is low.
Embodiment two
Fig. 2 is a kind of structural representation for onboard diagnostic device dormancy start-up circuit that the embodiment of the present invention two is provided,
On the basis of above-mentioned technical proposal, onboard diagnostic device dormancy start-up circuit also includes：
Voltage regulating module 130, is connected between battery voltage adjustment module 110 and level signal modular converter 120, for adjusting
Section is inputted to the voltage of the input of level signal modular converter 120.
Optionally, voltage regulating module 130 includes：The pressure regulation branch road being composed in series by least two impedors；
The output end of one end connection battery voltage adjustment module 110 of pressure regulation branch road, other end connection automobile storage battery 110
Negative pole；
The common port of adjacent impedance element is used as divider node, at least one divider node connection level signal modular converter
120 input.Wherein, impedor can be resistance or diode, example, as shown in Fig. 2 voltage regulating module 130 includes
The output end of resistance R2 and resistance R3, resistance R2 one end connection battery voltage adjustment module 110, other end connection resistance R3,
The resistance R3 other end connects the common port connection level signal modulus of conversion of the negative pole of automobile storage battery 100, resistance R2 and resistance R3
The input of block 120.By the resistance for matching resistance R2 and resistance R3, it is possible to achieve regulation input to level signal modular converter
The voltage of 120 input, so as to adapt to different car categories.
Further, onboard diagnostic device dormancy start-up circuit also includes：
Filtration module 140, is connected between battery voltage adjustment module 110 and level signal modular converter 120, for filtering
Except AC influence signal of the input into the voltage of the input of level signal modular converter 120.
Optionally, filtration module 140 includes：Electric capacity, the input of its one end connection level signal modular converter 120, separately
One end connects the negative pole of automobile storage battery 100.Example, as shown in Fig. 2 electric capacity C1 does the voltage after adjustment at appropriate filtering
Reason, can increase circuit stability.
Further, onboard diagnostic device dormancy start-up circuit also includes：
Current limliting module 150, is connected between battery voltage adjustment module 110 and level signal modular converter 120, for limiting
System is inputted to the electric current of the input of level signal modular converter 120.
Optionally, current limliting module 150 includes at least one current-limiting resistance, is connected to battery voltage adjustment module 110 and electricity
Between flat signal conversion module 120.Wherein, when level signal modular converter 120 is to include three described in above-mentioned technical proposal
During pole pipe Q1 and resistance R1, as shown in Fig. 2 being determined to limit according to the voltage after the pressure regulation of voltage regulating module 130 and triode Q1 model
Leakage resistance R4 resistance.
The technical scheme of the present embodiment, onboard diagnostic device dormancy start-up circuit can realize the various vehicles of adaptation, and
Signal stabilization, circuit reliability is high.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art it is various it is obvious change,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although the present invention is carried out by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (9)
1. a kind of onboard diagnostic device dormancy start-up circuit, it is characterised in that including：
Battery voltage adjustment module, its input connects the positive pole of automobile storage battery, output end connection level signal modular converter
Input, for when the voltage that automobile storage battery is exported be more than or equal to the first predeterminated voltage when, the voltage drop that automobile storage battery is exported
It is depressed into behind predeterminated voltage interval and is exported by the output end of battery voltage adjustment module, when the voltage that automobile storage battery is exported is less than first
During predeterminated voltage, the output voltage of battery voltage adjustment module is zero；
Level signal modular converter, its output end connect onboard diagnostic device dormancy awakening terminal, for when its input it is defeated
When the voltage entered is more than or equal to the second predeterminated voltage, its output end output logic low, when the voltage that its input is inputted is small
When the second predeterminated voltage, its output end output logic high.
2. circuit according to claim 1, it is characterised in that：
Battery voltage adjustment module includes voltage-regulator diode；
The negative pole of voltage-regulator diode is as the input of battery voltage adjustment module, and the positive pole of voltage-regulator diode is used as battery voltage
The output end of adjustment module, wherein, the first predeterminated voltage is the burning voltage of voltage-regulator diode, the burning voltage of voltage-regulator diode
Less than the nominal output voltage of automobile storage battery.
3. circuit according to claim 1, it is characterised in that：
Level signal modular converter includes triode and resistance；
The colelctor electrode of triode is as the output end of level signal modular converter, and the base stage of triode is used as level signal modulus of conversion
The input of block, the colelctor electrode of triode connects voltage source by resistance, and the emitter stage of triode connects the negative pole of automobile storage battery,
Wherein, the second predeterminated voltage is triode ON voltage.
4. circuit according to claim 1, it is characterised in that also include：
Voltage regulating module, is connected between battery voltage adjustment module and level signal modular converter, for adjusting input to level
The voltage of the input of signal conversion module.
5. circuit according to claim 4, it is characterised in that voltage regulating module includes：Connected by least two impedors
The pressure regulation branch road of composition；
One end of pressure regulation branch road connects the output end of battery voltage adjustment module, and the other end connects the negative pole of automobile storage battery；
The common port of adjacent impedance element connects the defeated of level signal modular converter as divider node, at least one divider node
Enter end.
6. circuit according to claim 1, it is characterised in that also include：
Filtration module, is connected between battery voltage adjustment module and level signal modular converter, for filtering out input to level
AC influence signal in the voltage of the input of signal conversion module.
7. circuit according to claim 6, it is characterised in that filtration module includes：Electric capacity, its one end connection level signal
The input of modular converter, the other end connects the negative pole of automobile storage battery.
8. circuit according to claim 1, it is characterised in that also include：
Current limliting module, is connected between battery voltage adjustment module and level signal modular converter, for limiting input to level
The electric current of the input of signal conversion module.
9. circuit according to claim 8, it is characterised in that current limliting module includes at least one current-limiting resistance, is connected to
Between battery voltage adjustment module and level signal modular converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710264561.6A CN106985771A (en) | 2017-04-21 | 2017-04-21 | A kind of onboard diagnostic device dormancy start-up circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710264561.6A CN106985771A (en) | 2017-04-21 | 2017-04-21 | A kind of onboard diagnostic device dormancy start-up circuit |
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| CN106985771A true CN106985771A (en) | 2017-07-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107703457A (en) * | 2017-09-26 | 2018-02-16 | 重庆市珞宾信息技术有限公司 | A kind of vehicular power-bottle low power testing device and method |
| CN109612544A (en) * | 2018-11-30 | 2019-04-12 | 重庆前卫克罗姆表业有限责任公司 | A kind of gas meter, flow meter that can passively switch power supply |
| CN112051463A (en) * | 2020-08-07 | 2020-12-08 | 广州亚美智造科技有限公司 | Vehicle-mounted diagnosis system plug detection circuit and vehicle management system |
| CN112947165A (en) * | 2021-02-01 | 2021-06-11 | 深圳市海沃德科技有限公司 | Method for waking up electronic equipment and electronic equipment |
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| CN112947165A (en) * | 2021-02-01 | 2021-06-11 | 深圳市海沃德科技有限公司 | Method for waking up electronic equipment and electronic equipment |
| CN112947165B (en) * | 2021-02-01 | 2024-04-05 | 深圳市海沃德科技有限公司 | Method for waking up electronic equipment and electronic equipment |
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Application publication date: 20170728 |