CN105752001A - Vehicle diagnostic system and delayed power-down circuit for vehicle - Google Patents
Vehicle diagnostic system and delayed power-down circuit for vehicle Download PDFInfo
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- CN105752001A CN105752001A CN201610102290.XA CN201610102290A CN105752001A CN 105752001 A CN105752001 A CN 105752001A CN 201610102290 A CN201610102290 A CN 201610102290A CN 105752001 A CN105752001 A CN 105752001A
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- outfan
- voltage
- operational amplifier
- voltage regulation
- regulation unit
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- 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
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- 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
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Abstract
The invention relates to a vehicle diagnostic system.The vehicle diagnostic system is provided with a power supply port used for being connected with a storage battery of an automobile to supply power to OBD.The OBD is further provided with an interface used for being connected with an automobile data recorder in a plug-in mode.Power is supplied to the automobile data recorder through the interface.The OBD comprises a power supply circuit used for supplying power to the interface.The circuit obtains electric energy through the power supply port after an automobile engine is started and supplies power to the interface.The circuit also has a delayed power-down function and stops supplying power to the interface after a period of time of delay after the automobile engine flames out.The invention further relates to the delayed power-down circuit for a vehicle.The voltage of the power supply port connected with the storage battery of the automobile is monitored through an I/O port; when the automobile is shut down, a delay capacitor is discharged; power supply to the automobile data recorder will be stopped only when the voltage of the capacitor is too low, so that the purpose of delayed power-down of the automobile data recorder is achieved, and the automobile data recorder is more durable and stable.
Description
Technical field
The present invention relates to automobile, particularly relate to a kind of vehicle diagnosing system, further relate to a kind of vehicle time delay down circuit.
Background technology
Vehicle diagnosing system (On-BoardDiagnostic, OBD) is the device of a kind of operation conditions for monitoring electromotor and exhaust gas aftertreatment system duty, once find the situation likely causing discharge to exceed standard, can send warning at once.When system malfunctions, trouble light (MIL) or inspection electromotor (CheckEngine) emergency warning lamp are bright, fault message can be stored in memorizer by OBD system simultaneously, reads relevant information by the diagnostic instruments of standard and diagnosis interface with the form of DTC.Prompting according to DTC, maintainer can determine character and the position of fault quickly and accurately.
OBD is except providing basic vehicle diagnostics function, it is also possible to provide the function that some are attached, for instance can connect with drive recorder, drive recorder is powered and provides the function such as data sharing, control.Part drive recorder does not have battery, does not have the components and parts of integrated delay power down, and after automobile flameout, power supply is instant to be stopped, and now drive recorder also needs to have processed the operational order etc. being carrying out, and causes loss of data, very easily damages machine.
Summary of the invention
Based on this, it is necessary to provide a kind of vehicle diagnosing system with time delay voltage output function.
A kind of vehicle diagnosing system, including for being connected the supply port to power to described vehicle diagnosing system with the accumulator of automobile, also including the interface for grafting drive recorder and the circuit for powering to described interface, described circuit includes the first operational amplifier, the second operational amplifier, the first voltage regulation unit, the second voltage regulation unit, the first bias unit, the second bias unit, the first switching tube, second switch pipe and delay capacitor；nullThe input of described first bias unit、The input of the second bias unit、The input of the first voltage regulation unit、The input of the second voltage regulation unit is all connected with described supply port，The in-phase input end of described first operational amplifier connects the outfan of described first bias unit，The inverting input of described first operational amplifier connects the outfan of described first voltage regulation unit，The outfan of described first operational amplifier connects the control end of described first switching tube，The in-phase input end of described second operational amplifier connects the outfan of described second voltage regulation unit，The inverting input of described second operational amplifier connects the outfan of described second bias unit，The outfan of described second operational amplifier connects the control end of described second switch pipe、The input of the first switching tube and one end of delay capacitor，The outfan of described second switch pipe powers to described interface，The other end ground connection of described delay capacitor，Described first switching tube conducting time by the control terminal voltage of described second switch pipe is dragged down thus control described second switch pipe end；Described supply port is run in automobile engine and be you can well imagine, with the time-division of stopping working, the voltage that voltage supplied value is different, the outfan of described first bias unit and the outfan of the second bias unit export the voltage fluctuated with described supply port, and the outfan of described first voltage regulation unit and the outfan of the second voltage regulation unit export stable voltage；And when described electromotor runs, the voltage that the voltage of the outfan output of described second bias unit exports less than the outfan of described second voltage regulation unit, make the outfan output high level of described second operational amplifier, the voltage that the voltage of the outfan output of described first bias unit exports less than the outfan of described first voltage regulation unit, make the outfan output low level of described first operational amplifier, control described first switching tube cut-off, described delay capacitor is charged and the conducting of described second switch pipe, power to described interface by the outfan of described second switch pipe；During described engine misses, the voltage that the voltage of the outfan output of described second bias unit exports more than the outfan of described second voltage regulation unit, make the outfan output low level of described second operational amplifier, the voltage that the voltage of the outfan output of described first bias unit exports more than the outfan of described first voltage regulation unit, make the outfan output high level of described first operational amplifier, described delay capacitor is discharged by described first switching tube, the cut-off when described delay capacitor is discharged to and is not enough to maintain its conducting of described second switch pipe, stop described interface is powered.
Wherein in an embodiment, described first bias unit include two be serially connected after respectively ground connection and connect the resistance of described supply port, two interconnective junction points of resistance are the outfan of described first bias unit.
Wherein in an embodiment, described first voltage regulation unit includes resistance R9 and Zener diode D5, described resistance R9 one end connects described supply port, the other end connects the negative electrode of described Zener diode D5, the plus earth of described Zener diode D5, the negative electrode of described Zener diode D5 is as the outfan of described first voltage regulation unit.
Wherein in an embodiment, described first voltage regulation unit also includes and described electric capacity C13 in parallel for Zener diode D5.
Wherein in an embodiment, described second voltage regulation unit includes resistance R7 and Zener diode D4, described resistance R7 one end connects described supply port, the other end connects the negative electrode of described Zener diode D4, the plus earth of described Zener diode D4, the negative electrode of described Zener diode D4 is as the outfan of described second voltage regulation unit.
Wherein in an embodiment, described second bias unit includes resistance R6 and Zener diode D3, the negative electrode of described Zener diode D3 connects described supply port, anode connects one end of described resistance R6, the other end ground connection of described resistance R6, the anode of described Zener diode D3 is as the outfan of described second bias unit.
Wherein in an embodiment, described first switching tube is NPN type triode, and described second switch pipe is P-channel metal-oxide-semiconductor.
Wherein in an embodiment, described circuit also includes resistance R5, resistance R12, resistance R16 and resistance R18, the base stage of described NPN type triode connects the outfan of described first operational amplifier by resistance R12, the emitter stage of described NPN type triode connects one end of described supply port and resistance R16, the other end of resistance R16 connects the base stage of described NPN type triode, the colelctor electrode of described NPN type triode connects the grid of described P-channel metal-oxide-semiconductor by described resistance R18, and described resistance R5 is connected between grid and the source electrode of P-channel metal-oxide-semiconductor.
Wherein in an embodiment, described first operational amplifier and the second operational amplifier are integrated on an amplifier chip, and the supply pin of described amplifier chip connects described supply port.
Wherein in an embodiment, described circuit also includes filter capacitor C10, described filter capacitor C10 and connects described supply pin.
Above-mentioned vehicle diagnosing system, the voltage of the supply port that monitoring is connected with automobile storage battery, when automobile flameout, delay capacitor is discharged, second switch pipe just can close the power supply to drive recorder when delay capacitor is discharged to and is not enough to maintain its conducting, reach the purpose to drive recorder time delay power down, make drive recorder more durable, more stable.
There is a need to provide a kind of vehicle time delay down circuit with time delay voltage output function.
A kind of vehicle time delay down circuit, including for being connected to obtain the supply port of electric energy with the accumulator of automobile, and for exporting the interface of electric energy, described circuit includes the first operational amplifier, the second operational amplifier, the first voltage regulation unit, the second voltage regulation unit, the first bias unit, the second bias unit, the first switching tube, second switch pipe and delay capacitor；nullThe input of described first bias unit、The input of the second bias unit、The input of the first voltage regulation unit、The input of the second voltage regulation unit is all connected with described supply port，The in-phase input end of described first operational amplifier connects the outfan of described first bias unit，The inverting input of described first operational amplifier connects the outfan of described first voltage regulation unit，The outfan of described first operational amplifier connects the control end of described first switching tube，The in-phase input end of described second operational amplifier connects the outfan of described second voltage regulation unit，The inverting input of described second operational amplifier connects the outfan of described second bias unit，The outfan of described second operational amplifier connects the control end of described second switch pipe、The input of the first switching tube and one end of delay capacitor，The outfan of described second switch pipe powers to described interface，The other end ground connection of described delay capacitor，Described first switching tube conducting time by the control terminal voltage of described second switch pipe is dragged down thus control described second switch pipe end；Described supply port is run in automobile engine and be you can well imagine, with the time-division of stopping working, the voltage that voltage supplied value is different, the outfan of described first bias unit and the outfan of the second bias unit export the voltage fluctuated with described supply port, and the outfan of described first voltage regulation unit and the outfan of the second voltage regulation unit export stable voltage；And when described electromotor runs, the voltage that the voltage of the outfan output of described second bias unit exports less than the outfan of described second voltage regulation unit, make the outfan output high level of described second operational amplifier, the voltage that the voltage of the outfan output of described first bias unit exports less than the outfan of described first voltage regulation unit, make the outfan output low level of described first operational amplifier, control described first switching tube cut-off, described delay capacitor is charged and the conducting of described second switch pipe, power to described interface by the outfan of described second switch pipe；During described engine misses, the voltage that the voltage of the outfan output of described second bias unit exports more than the outfan of described second voltage regulation unit, make the outfan output low level of described second operational amplifier, the voltage that the voltage of the outfan output of described first bias unit exports more than the outfan of described first voltage regulation unit, make the outfan output high level of described first operational amplifier, described delay capacitor is discharged by described first switching tube, the cut-off when described delay capacitor is discharged to and is not enough to maintain its conducting of described second switch pipe, stop described interface is powered.
Wherein in an embodiment, described first bias unit include two be serially connected after respectively ground connection and connect the resistance of described supply port, two interconnective junction points of resistance are the outfan of described first bias unit.
Wherein in an embodiment, described first voltage regulation unit includes resistance R9 and Zener diode D5, described resistance R9 one end connects described supply port, the other end connects the negative electrode of described Zener diode D5, the plus earth of described Zener diode D5, the negative electrode of described Zener diode D5 is as the outfan of described first voltage regulation unit.
Wherein in an embodiment, described first voltage regulation unit also includes and described electric capacity C13 in parallel for Zener diode D5.
Wherein in an embodiment, described second voltage regulation unit includes resistance R7 and Zener diode D4, described resistance R7 one end connects described supply port, the other end connects the negative electrode of described Zener diode D4, the plus earth of described Zener diode D4, the negative electrode of described Zener diode D4 is as the outfan of described second voltage regulation unit.
Wherein in an embodiment, described second bias unit includes resistance R6 and Zener diode D3, the negative electrode of described Zener diode D3 connects described supply port, anode connects one end of described resistance R6, the other end ground connection of described resistance R6, the anode of described Zener diode D3 is as the outfan of described second bias unit.
Wherein in an embodiment, described first switching tube is NPN type triode, and described second switch pipe is P-channel metal-oxide-semiconductor.
Wherein in an embodiment, described circuit also includes resistance R5, resistance R12, resistance R16 and resistance R18, the base stage of described NPN type triode connects the outfan of described first operational amplifier by resistance R12, the emitter stage of described NPN type triode connects one end of described supply port and resistance R16, the other end of resistance R16 connects the base stage of described NPN type triode, the colelctor electrode of described NPN type triode connects the grid of described P-channel metal-oxide-semiconductor by described resistance R18, and described resistance R5 is connected between grid and the source electrode of P-channel metal-oxide-semiconductor.
Wherein in an embodiment, described first operational amplifier and the second operational amplifier are integrated on an amplifier chip, and the supply pin of described amplifier chip connects described supply port.
Wherein in an embodiment, described circuit also includes filter capacitor C10, described filter capacitor C10 and connects described supply pin.
Above-mentioned vehicle time delay down circuit, the voltage of the supply port that monitoring is connected with automobile storage battery, when automobile flameout, delay capacitor is discharged, second switch pipe is discharged to, at delay capacitor, the voltage output being not enough to maintain just meeting down interface when it turns on, and reaches the purpose of time delay voltage output.
Accompanying drawing explanation
Fig. 1 is the structure chart of the power supply circuits of vehicle diagnosing system in an embodiment；
Fig. 2 is the structure chart of the power supply circuits of vehicle diagnosing system in another embodiment；
Fig. 3 is the schematic diagram of the power supply circuits of vehicle diagnosing system in an embodiment.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Unless otherwise defined, all of technology used herein is identical with the implication that the those skilled in the art belonging to the present invention are generally understood that with scientific terminology.The term used in the description of the invention herein is intended merely to the purpose describing specific embodiment, it is not intended that in the restriction present invention.Term as used herein " and/or " include the arbitrary and all of combination of one or more relevant Listed Items.
The vehicle diagnosing system of the present invention is provided with for being connected the supply port to power to OBD with the accumulator of automobile (i.e. storage battery), this OBD is additionally provided with the interface for grafting drive recorder, by this interface, drive recorder is powered, communication can also be carried out with drive recorder, it is provided that the function such as data sharing, control according to the kind of interface.OBD includes the power supply circuits for powering to described interface, this circuit obtains electric energy by described supply port after car engine start and powers to described interface, and this circuit has the function of time delay power down, after flameout of automobile engine, delay certain time stops to the power supply of described interface again.
Referring to Fig. 1, power supply circuits include voltage ratio relatively processing module 100, gate circuit 200 and delay capacitor, voltage ratio relatively processing module 100 connects gate circuit 200 and delay capacitor, and voltage ratio relatively processing module 100 connects supply port, and gate circuit 200 connects the interface for grafting drive recorder.During car engine start, vehicle diagnosing system passes through OBD agreement, the input/output port (I/O mouth) utilizing drive recorder detects the voltage of automobile storage battery, then voltage ratio is carried out relatively and the process such as blood pressure lowering by voltage ratio relatively processing module 100, output control Control of Voltage gate circuit 200 turns on again, thus powering (namely powering) to drive recorder to described interface.During vehicle stall, vehicle diagnosing system is closed after having processed, again by OBD notice of settlement drive recorder, the operational order being carrying out, and utilize the input/output port (I/O mouth) of drive recorder to detect the voltage of automobile storage battery, then voltage ratio is carried out relatively and the process such as blood pressure lowering by voltage ratio relatively processing module 100, output controls the electric discharge of Control of Voltage delay capacitor again, it is discharged to until delay capacitor and is unable to maintain that gate circuit 200 ends when turning on immediately, drive recorder power down.
Above-mentioned vehicle diagnosing system, the voltage of the supply port that monitoring is connected with automobile storage battery, when automobile flameout, delay capacitor is discharged, the power supply to drive recorder just can be closed when capacitance voltage is too low, reach the purpose to drive recorder time delay power down, make drive recorder more durable, more stable.
Fig. 2 is the structure chart of the power supply circuits of vehicle diagnosing system in an embodiment, including first operational amplifier the 12, second operational amplifier the 14, first voltage regulation unit the 32, second voltage regulation unit the 34, first bias unit the 42, second bias unit the 44, first switching tube 22, second switch pipe 24 and delay capacitor C12.Wherein first operational amplifier the 12, second operational amplifier the 14, first voltage regulation unit the 32, second voltage regulation unit the 34, first bias unit 42 and the second bias unit 44 belong to comparison process module 100, and the first switching tube 22 and second switch pipe 24 belong to gate circuit 200.The input of the first bias unit 42, the input of the second bias unit 44, the input of the first voltage regulation unit 32, the second voltage regulation unit 34 input be all connected with supply port BATT.The in-phase input end of the first operational amplifier 12 connects the outfan of the first bias unit 42, and the inverting input of the first operational amplifier 12 connects the outfan of the first voltage regulation unit 32, and the outfan of the first operational amplifier 12 connects the control end of the first switching tube 22.The in-phase input end of the second operational amplifier 14 connects the outfan of the second voltage regulation unit 34, the inverting input of the second operational amplifier 14 connects the outfan of the second bias unit 44, the outfan of the second operational amplifier 14 connects one end controlling end, the input of the first switching tube 22 and delay capacitor C12 of second switch pipe 24, the outfan of second switch pipe 24 powers to described interface, working power, the other end ground connection of delay capacitor C12 is provided for drive recorder.First switching tube 22 conducting time by the control terminal voltage of second switch pipe 24 being dragged down thus controlling second switch pipe 24 and ending.
Due to supply port BATT be connect automobile storage battery, after automobile engine is started, accumulator can work together with electromotor, therefore supply port BATT car engine and flame-out time voltage be different.The outfan of the first bias unit 42 and the outfan of the second bias unit 44 are for exporting the voltage with supply port BATT fluctuation, the outfan of the first voltage regulation unit 32 and the outfan of the second voltage regulation unit 34 for exporting stable voltage.
When electromotor runs, the voltage that the voltage of the outfan output of the second bias unit 44 exports less than the outfan of the second voltage regulation unit 34, make the outfan output high level of the second operational amplifier 14, the voltage that the voltage of the outfan output of the first bias unit 42 exports less than the outfan of the first voltage regulation unit 32, make the outfan output low level of the first operational amplifier 12, control the first switching tube 22 to end, delay capacitor 12 is charged and controls second switch pipe 24 turning on by the high level of the outfan output of the second operational amplifier 14, powered to interface by the outfan of second switch pipe 24, drive recorder obtains electric work.
During engine misses, the voltage that the voltage of the outfan output of the second bias unit 44 exports more than the outfan of the second voltage regulation unit 34, make the outfan output low level of the second operational amplifier 14, the voltage that the voltage of the outfan output of the first bias unit 42 exports more than the outfan of the first voltage regulation unit 32, make the outfan output high level of the first operational amplifier 12, delay capacitor C12 is discharged by the first switching tube 22, delay capacitor C12 be discharged to be not enough to maintain second switch pipe 24 turn on time, second switch pipe 24 ends, stop described interface is powered.
Fig. 3 is the schematic diagram of the power supply circuits of vehicle diagnosing system in an embodiment.In this embodiment, using an amplifier chip U1 being integrated with two operational amplifiers as the first operational amplifier and the second operational amplifier, the supply pin VCC of amplifier chip U1 connects supply port BATT.Supply pin VCC is connected to a filter capacitor C10.
First bias unit 42 includes two resistance R10 and R11 being serially connected, resistance R10 ground connection, resistance R11 connects the resistance of supply port BATT, and two interconnective junction points of resistance are the outfan 5V7 of the first bias unit 42, connect the in-phase input end of the first operational amplifier 12.
First voltage regulation unit 32 includes resistance R9 and Zener diode D5.Resistance R9 one end connects supply port BATT, and the other end connects the negative electrode of Zener diode D5, and the plus earth of Zener diode D5, the negative electrode of Zener diode D5 is as the outfan of the first voltage regulation unit 32.In the embodiment shown in fig. 3, the first voltage regulation unit 32 also includes the filter capacitor C13 in parallel with Zener diode D5.
Second voltage regulation unit 34 includes resistance R7 and Zener diode D4.Resistance R7 one end connects supply port BATT, and the other end connects the negative electrode of Zener diode D4, and the plus earth of Zener diode D4, the negative electrode of Zener diode D4 is as the outfan of the second voltage regulation unit 34.
Second bias unit 44 includes the negative electrode of resistance R6 and Zener diode D3, Zener diode D3 and connects supply port BATT, and anode connects one end of resistance R6, and the other end ground connection of resistance R6, the anode of Zener diode D3 is as the outfan of the second bias unit 44.
When stopping working due to automobile current generator, 7 feet of the first operational amplifier export 1 foot output low level of high level, the second operational amplifier；Automobile current generator run time, 7 foot output low levels of the first operational amplifier, the second operational amplifier 1 foot output high level.Therefore the first switching tube and choosing of second switch pipe to be capable of when 7 feet of the first operational amplifier export 1 foot output low level of high level, the second operational amplifier, the first switching tube conducting, the cut-off of second switch pipe；7 foot output low levels of the first operational amplifier, the second operational amplifier 1 foot output high level time, first switching tube cut-off, second switch pipe conducting.In the embodiment shown in fig. 3, the first switching tube is NPN type triode Q5, and second switch pipe is P-channel metal-oxide-semiconductor Q1.In other embodiments, it is also possible to select other audion, MOSFET etc. of being capable of above-mentioned functions.
In the embodiment shown in fig. 3, power supply circuits also include resistance R5, resistance R12, resistance R16 and resistance R18.The base stage of NPN type triode Q5 connects outfan 7 foot of the first operational amplifier by resistance R12, the emitter stage of NPN type triode Q5 connects one end of supply port BATT and resistance R16, the other end of resistance R16 connects the base stage of NPN type triode Q5, the colelctor electrode of NPN type triode Q5 connects the grid of P-channel metal-oxide-semiconductor Q1 by resistance R18, and resistance R5 is connected between grid and the source electrode of P-channel metal-oxide-semiconductor Q1.
It should be understood that the power supply circuits in various embodiments above can be not only used in drive recorder, it is also possible to as a kind of independent vehicle time delay down circuit design, it is provided that to the electrical appliance on automobile to realize the time delay power down function needed for these electrical appliances.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a vehicle diagnosing system, including for being connected the supply port to power to described vehicle diagnosing system with the accumulator of automobile, it is characterized in that, also including the interface for grafting drive recorder and the circuit for powering to described interface, described circuit includes the first operational amplifier, the second operational amplifier, the first voltage regulation unit, the second voltage regulation unit, the first bias unit, the second bias unit, the first switching tube, second switch pipe and delay capacitor；nullThe input of described first bias unit、The input of the second bias unit、The input of the first voltage regulation unit、The input of the second voltage regulation unit is all connected with described supply port，The in-phase input end of described first operational amplifier connects the outfan of described first bias unit，The inverting input of described first operational amplifier connects the outfan of described first voltage regulation unit，The outfan of described first operational amplifier connects the control end of described first switching tube，The in-phase input end of described second operational amplifier connects the outfan of described second voltage regulation unit，The inverting input of described second operational amplifier connects the outfan of described second bias unit，The outfan of described second operational amplifier connects the control end of described second switch pipe、The input of the first switching tube and one end of delay capacitor，The outfan of described second switch pipe powers to described interface，The other end ground connection of described delay capacitor，Described first switching tube conducting time by the control terminal voltage of described second switch pipe is dragged down thus control described second switch pipe end；
Described supply port is run in automobile engine and be you can well imagine, with the time-division of stopping working, the voltage that voltage supplied value is different, the outfan of described first bias unit and the outfan of the second bias unit export the voltage fluctuated with described supply port, and the outfan of described first voltage regulation unit and the outfan of the second voltage regulation unit export stable voltage；And when described electromotor runs, the voltage that the voltage of the outfan output of described second bias unit exports less than the outfan of described second voltage regulation unit, make the outfan output high level of described second operational amplifier, the voltage that the voltage of the outfan output of described first bias unit exports less than the outfan of described first voltage regulation unit, make the outfan output low level of described first operational amplifier, control described first switching tube cut-off, described delay capacitor is charged and the conducting of described second switch pipe, power to described interface by the outfan of described second switch pipe；
During described engine misses, the voltage that the voltage of the outfan output of described second bias unit exports more than the outfan of described second voltage regulation unit, make the outfan output low level of described second operational amplifier, the voltage that the voltage of the outfan output of described first bias unit exports more than the outfan of described first voltage regulation unit, make the outfan output high level of described first operational amplifier, described delay capacitor is discharged by described first switching tube, the cut-off when described delay capacitor is discharged to and is not enough to maintain its conducting of described second switch pipe, stop described interface is powered.
2. vehicle diagnosing system according to claim 1, it is characterized in that, described first bias unit include two be serially connected after respectively ground connection and connect the resistance of described supply port, two interconnective junction points of resistance are the outfan of described first bias unit.
3. vehicle diagnosing system according to claim 1, it is characterized in that, described first voltage regulation unit includes resistance R9 and Zener diode D5, described resistance R9 one end connects described supply port, the other end connects the negative electrode of described Zener diode D5, the plus earth of described Zener diode D5, the negative electrode of described Zener diode D5 is as the outfan of described first voltage regulation unit.
4. vehicle diagnosing system according to claim 1, it is characterised in that described first voltage regulation unit also includes and described electric capacity C13 in parallel for Zener diode D5.
5. vehicle diagnosing system according to claim 1, it is characterized in that, described second voltage regulation unit includes resistance R7 and Zener diode D4, described resistance R7 one end connects described supply port, the other end connects the negative electrode of described Zener diode D4, the plus earth of described Zener diode D4, the negative electrode of described Zener diode D4 is as the outfan of described second voltage regulation unit.
6. vehicle diagnosing system according to claim 1, it is characterized in that, described second bias unit includes resistance R6 and Zener diode D3, the negative electrode of described Zener diode D3 connects described supply port, anode connects one end of described resistance R6, the other end ground connection of described resistance R6, the anode of described Zener diode D3 is as the outfan of described second bias unit.
7. vehicle diagnosing system according to claim 1, it is characterised in that described first switching tube is NPN type triode, described second switch pipe is P-channel metal-oxide-semiconductor.
8. vehicle diagnosing system according to claim 7, it is characterized in that, described circuit also includes resistance R5, resistance R12, resistance R16 and resistance R18, the base stage of described NPN type triode connects the outfan of described first operational amplifier by resistance R12, the emitter stage of described NPN type triode connects one end of described supply port and resistance R16, the other end of resistance R16 connects the base stage of described NPN type triode, the colelctor electrode of described NPN type triode connects the grid of described P-channel metal-oxide-semiconductor by described resistance R18, described resistance R5 is connected between grid and the source electrode of P-channel metal-oxide-semiconductor.
9. the vehicle diagnosing system according to any one of claim 1-8, it is characterised in that described first operational amplifier and the second operational amplifier are integrated on an amplifier chip, the supply pin of described amplifier chip connects described supply port.
10. a vehicle time delay down circuit, including for being connected to obtain the supply port of electric energy with the accumulator of automobile, and for exporting the interface of electric energy, it is characterized in that, described circuit includes the first operational amplifier, the second operational amplifier, the first voltage regulation unit, the second voltage regulation unit, the first bias unit, the second bias unit, the first switching tube, second switch pipe and delay capacitor；nullThe input of described first bias unit、The input of the second bias unit、The input of the first voltage regulation unit、The input of the second voltage regulation unit is all connected with described supply port，The in-phase input end of described first operational amplifier connects the outfan of described first bias unit，The inverting input of described first operational amplifier connects the outfan of described first voltage regulation unit，The outfan of described first operational amplifier connects the control end of described first switching tube，The in-phase input end of described second operational amplifier connects the outfan of described second voltage regulation unit，The inverting input of described second operational amplifier connects the outfan of described second bias unit，The outfan of described second operational amplifier connects the control end of described second switch pipe、The input of the first switching tube and one end of delay capacitor，The outfan of described second switch pipe powers to described interface，The other end ground connection of described delay capacitor，Described first switching tube conducting time by the control terminal voltage of described second switch pipe is dragged down thus control described second switch pipe end；
Described supply port is run in automobile engine and be you can well imagine, with the time-division of stopping working, the voltage that voltage supplied value is different, the outfan of described first bias unit and the outfan of the second bias unit export the voltage fluctuated with described supply port, and the outfan of described first voltage regulation unit and the outfan of the second voltage regulation unit export stable voltage；And when described electromotor runs, the voltage that the voltage of the outfan output of described second bias unit exports less than the outfan of described second voltage regulation unit, make the outfan output high level of described second operational amplifier, the voltage that the voltage of the outfan output of described first bias unit exports less than the outfan of described first voltage regulation unit, make the outfan output low level of described first operational amplifier, control described first switching tube cut-off, described delay capacitor is charged and the conducting of described second switch pipe, power to described interface by the outfan of described second switch pipe；
During described engine misses, the voltage that the voltage of the outfan output of described second bias unit exports more than the outfan of described second voltage regulation unit, make the outfan output low level of described second operational amplifier, the voltage that the voltage of the outfan output of described first bias unit exports more than the outfan of described first voltage regulation unit, make the outfan output high level of described first operational amplifier, described delay capacitor is discharged by described first switching tube, the cut-off when described delay capacitor is discharged to and is not enough to maintain its conducting of described second switch pipe, stop described interface is powered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610102290.XA CN105752001B (en) | 2016-02-24 | 2016-02-24 | Vehicle diagnosing system and vehicle delay down circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610102290.XA CN105752001B (en) | 2016-02-24 | 2016-02-24 | Vehicle diagnosing system and vehicle delay down circuit |
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| CN105752001A true CN105752001A (en) | 2016-07-13 |
| CN105752001B CN105752001B (en) | 2018-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN112034760A (en) * | 2020-09-03 | 2020-12-04 | 福建永强力加动力设备有限公司 | Diesel generator shutdown delay controller circuit with simple structure |
| CN114610003A (en) * | 2022-04-18 | 2022-06-10 | 深圳市元征软件开发有限公司 | Vehicle diagnosis method, apparatus, device, and medium |
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|---|---|
| CN105752001B (en) | 2018-05-01 |
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