CN104481773B - A kind of igniting TT&C system becoming energy and investigating method thereof - Google Patents
A kind of igniting TT&C system becoming energy and investigating method thereof Download PDFInfo
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- CN104481773B CN104481773B CN201410742400.XA CN201410742400A CN104481773B CN 104481773 B CN104481773 B CN 104481773B CN 201410742400 A CN201410742400 A CN 201410742400A CN 104481773 B CN104481773 B CN 104481773B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/12—Testing characteristics of the spark, ignition voltage or current
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/12—Testing characteristics of the spark, ignition voltage or current
- F02P2017/121—Testing characteristics of the spark, ignition voltage or current by measuring spark voltage
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The present invention relates to a kind of igniting TT&C system becoming energy and investigating method thereof, this system includes charge circuit, discharge loop and driving control circuit；Described charge circuit includes: linear DC constant pressure source, and is connected to the first diode between linear DC constant pressure source positive pole and negative pole, the first resistance, charging control switch, the second diode and capacitance group in turn；Described discharge loop includes discharge control switch, ignition coil, voltage probe and ignitor, PC, oscillograph and current probe；Described driving control circuit sends triggering signal by PC, realizes the communication with single-chip microcomputer by serial port module, thus controlling the corresponding break-make of charging control switch and discharge control switch, thus completing to light a fire each time.The present invention, in ignition process each time, can accurately measure out the ignition energy size of ignition process each time, and obtain EC-EICurve, controls the size of ignition energy thereby through the energy storage size changing capacitance group.
Description
Technical field
The present invention relates to igniting TT&C system, in particular to a kind of igniting TT&C system becoming energy and investigating method thereof.
Background technology
Ignition energy is one of important factor in order of engine performance, affects the catch fire forming process of core and the spread speed of fuel incipient flame.Utilize engine pedestal can carry out about the research for engine power performance, economy and discharge of the different ignition energies, utilize constant volume combustion bomb system then can study the impact for flame initial stage communication process of the difference ignition energy.Therefore carry out the research of ignition energy aspect just to have and be of great significance, it is possible to for optimizing the design of engine igniting system and controlling to provide theoretical foundation.
Minimum ignition energy refers to the minimum energy value required for ignite finite concentration combustible or blast, is used to weigh the important parameter of the explosion hazard of fuel gas or liquid vapour, is also the important parameter of electrostatic safety.Measure the minimum ignition energy of different fuel, both can provide reference for the safety in transportation and storage of fuel gas or liquid, it is also possible to the ignition system for electromotor designs offer relevant parameter foundation.Therefore the minimum ignition energy measuring different fuel is significant.Utilize constant volume combustion bomb can measure the minimum ignition energy of different fuel (gaseous fuel and partially liq fuel).
At present in disclosed variable energy ignition system, major part is to be controlled the change of ignition energy qualitatively by the parameter of control effect change energy, for instance in inductance type ignition system, realize becoming energy by controlling the charging interval.The size demarcating ignition energy it is similar to, it is impossible to accomplish to obtain in real time the ignition energy size of ignition process each time by means of fictitious load means.Due in discharge process between electrode load more complicated so that there is some difference for the ignition energy size of demarcation and actual ignition energy.
The ignition system that conventional minimum ignition energy measuring device adopts, provides ten thousand volts of high pressure that electric capacity is charged generally by DC source, then passes through and allows electric capacity discharge igniting.Ignition energy then thinks the energy storage value of electric capacity.Although this ignition system simple in construction, but owing to the output voltage of power supply is excessive, require higher for component pressure in circuit, reduce the service life of system, there is certain danger in operation.Simultaneously because there is line loss so that actual ignition energy stores energy value less than electric capacity.
Summary of the invention
Present invention aim to overcome that above-mentioned the deficiencies in the prior art provide a kind of igniting TT&C system becoming energy and investigating method thereof, this igniting TT&C system be capable of in ignition process ignition energy adjustable with can survey, both can change ignition energy as required, and the ignition energy size of ignition process each time can have been accurately measured out.
Realize the object of the invention and employed technical scheme comprise that a kind of igniting TT&C system becoming energy, including charge circuit, discharge loop and control described charge circuit, driving control circuit, voltage probe, current probe, ignitor, oscillograph and PC that discharge loop charges and discharges；
Described charge circuit includes: linear DC constant pressure source, and is connected to the first diode between linear DC constant pressure source positive pole and negative pole, the first resistance, charging control switch, the second diode and capacitance group in turn；
Described discharge loop includes described capacitance group, discharge control switch, ignition coil and ignitor, one end of described discharge control switch is connected with the negative electrode of the second diode, the other end is connected with one end of primary coil in ignition coil, and the two ends of ignitor are connected with power cathode with the outfan of secondary coil in ignition coil respectively；The electrode that the test lead of described voltage probe is connected with secondary coil outfan in ignition coil connects, and earth wire clamp is connected with the other end of electrode；Current probe accesses in electrode circuit, and the collection outfan of voltage probe and current probe is connected with oscillograph respectively, and oscillograph is connected with PC by data wire；
Described driving control circuit includes 5V DC source, 32V DC source, photoelectrical coupler, Single Chip Microcomputer (SCM) system, audion and Zener diode, the positive pole of described 5V DC source is through resistance R2, connecting the photoelectrical coupler positive pole in light emitting diode side, the negative pole of light emitting diode side is connected with the operational pin PX needed for Single Chip Microcomputer (SCM) system；Single Chip Microcomputer (SCM) system is connected with PC by serial port module；The emitter stage of the outfan of photoelectrical coupler is connected with the negative pole of 32V DC source, and colelctor electrode is then connected with resistance R4, is connected with the base stage of audion simultaneously；It is connected with the positive pole of 32V DC source after resistance R3 and resistance R4 series connection, the emitter stage of audion is connected between resistance R4 and resistance R3, transistor collector is connected with any input k1 of the solenoid in charging control switch and discharge control switch, and is connected with the negative pole of Zener diode；The negative pole of solenoid another input k2 and 32V DC source is connected, and is connected with the positive pole of Zener diode.
In technique scheme, the described anode of the first diode D1 is connected with the positive pole of linear DC constant pressure source 1, it is sequentially connected between negative electrode and the anode of the second diode D2 of the first diode D1 and connects the first resistance R1 and charging control switch, the negative electrode of the second diode D2 is connected with one end of capacitance group, and the other end of capacitance group is connected with the negative pole of linear DC constant pressure source.
In technique scheme, described linear DC constant pressure source output voltage of change between 0～400V；Described capacitance group is formed by the Capacitance parallel connection of different capacitances, and each capacitances in series one selects switch, and in order to regulate the capacitance of connect electric capacity in circuit, electric capacity used is polypropylene capactive, and selection used switch is mechanical switch.
A kind of preferred implementation as the present invention, when the igniting TT&C system of described change energy is located on engine pedestal, described linear DC constant pressure source includes the boost rectifying circuit being connected with automobile storage battery, and for controlling the adjustment switch of turn ratio in boost rectifying circuit；Charging control section is divided and is included one-way SCR and for controlling the triggering circuit of one-way SCR, and described triggering circuit is connected with Engine ECU；Described control of discharge part is solid-state relay and the driving control circuit of solid-state relay connection, and described driving control circuit is connected with Engine ECU.
As a kind of preferred implementation of the present invention, when the igniting TT&C system of described change energy is on constant volume combustion bomb experimental stand, described linear DC power supply for converting required DC voltage to by civil power；Described charging control switch and discharge control switch are and the high-power magnetic relay driving control circuit to be connected that drive circuit is controlled by single-chip microcomputer, and single-chip microcomputer is attached by serial ports and PC.
Additionally, the present invention also provides for a kind of method carrying out observing and controlling according to the igniting TT&C system of above-mentioned change energy, the method comprises the following steps:
(1) when PC sends ignition signal, Single Chip Microcomputer (SCM) system controls charging control switch 2 and closes a period of time, until completing the charging to capacitance group；Making the voltage at capacitance group two ends equal to electric power output voltage, after capacitance group charging complete, charging control switch disconnects, discharge control switch closes, and capacitance group is discharged, and produces an instantaneous high pressure at secondary coil L2 outfan, the interelectrode combustion mixture of perforation ignition, completes igniting；
(2) in ignition process, voltage probe and current probe collection point thermoelectricity voltage across poles and current signal respectively, and in its incoming oscillograph, the collection to Wave data will be completed and show with waveform；
(3), after PC receives oscillographic data by data wire, the voltage on the electric discharge period and electric current are integrated computing, and then obtain this ignition energy value；
(4) time according to required ignition energy, the output voltage values of linear constant pressure source and the capacitance of capacitance group are controlled, thus realizing controlling ignition energy.
Further, voltage interelectrode in discharge time and current data being done integral and calculating, obtains ignition energy value, the computing formula of ignition energy is:
In formula: EIFor ignition energy, t1For the moment that igniting starts, t2For igniting terminate moment, U be igniting during magnitude of voltage, I be igniting during current value；
Owing to the signal of oscillograph actual acquisition is the discrete point in a certain duration, therefore above-mentioned formula is deformed into:
In formula: EIFor ignition energy, t1For the moment that igniting starts, t2For the moment that igniting terminates, u gathers the magnitude of voltage in each moment during being igniting, i gathers the current value in each moment during being igniting, Δ t is the oscillographic sample rate cycle；
By repetitive measurement, obtain the relation between the energy storage of electric capacity and ignition energy, and then E can be obtainedC-EICurve, when a certain ignition energy of needs, according to EC-EICurve, the energy storage value of coarse adjustment electric capacity, make ignition energy close to needing energy value；By the actual ignition energy value recorded, then the energy storage value of fine tuning electric capacity, so that actual ignition energy approximation convergence is required ignition energy.
In technique scheme, in described step (1), Single Chip Microcomputer (SCM) system controls specifically comprising the following steps that of charging control switch and discharge control switch
PC sends ignition signal to Single Chip Microcomputer (SCM) system by serial ports, after Single Chip Microcomputer (SCM) system receives this ignition signal, completes the potential change of operational pin PX according to setting program；When operational pin PX is become electronegative potential from high potential, the light emitting diode of photoelectrical coupler is connected, make the audion saturation conduction of optocoupler internal output terminal, now the base stage of audion is become low potential from high potential, resistance by build-out resistor R3 and R4 so that audion saturation conduction, and make the voltage between two inputs of solenoid equal to its rated operational voltage, now electromagnetic relay adhesive, charging control switch or discharge control switch Guan Bi；Otherwise, when the operational pin PX of Single Chip Microcomputer (SCM) system is high potential, photoelectrical coupler turns off, and audion ends so that the voltage between electromagnetic relay input is 0, and charging control switch or discharge control switch disconnect.
Work process of the present invention is as follows:
When charging control switch closes, complete the charging to capacitance group.After capacitance group charging complete, charging control switch disconnects, and discharge control switch closes, and now capacitance group, discharge control switch and ignition coil constitute another loop.During discharge control switch Guan Bi, capacitance group completes electric discharge, and electric current flows through the primary coil of ignition coil so that produce an instantaneous high pressure on the secondary winding.Owing to one end of electrode is connected with the secondary coil outfan of ignition coil, one end is connected with power cathode so that produce instantaneous high pressure, the gas between breakdown electrode between electrode, thus completing igniting.
The present invention is in ignition process, voltage probe and current probe are respectively intended to gather interelectrode voltage signal and current signal in ignition process, and it is sent in oscillograph data acquisition and waveform shows, collect two incoming computers of Wave data will complete correlation computations again, calculate and obtain ignition energy value.
Additionally, the present invention can also pass through to change in circuit the size of the voltage U at capacitance group two ends after the capacitance C of capacitance group and charging, change the size of capacitance group energy storage.The present invention in ignition process each time, the size of ignition energy, it is possible to by change capacitance group energy storage size realize.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that the present invention becomes the igniting TT&C system of energy.
Fig. 2 is the driving control circuit figure that charge and discharge control switch.
Number in the figure is as follows:
1-linear DC power supply (A+ linear DC power supply positive pole A-linear DC power supply negative pole)
D1 diode
D2 diode
D3 Zener diode
R1 resistance
R2 resistance
R3 resistance
R4 resistance
2 charging control switches
3 discharge control switches
4 ignition coils
5 voltage probes
6 ignitors
7PC machine
8 oscillographs
9 current probes
10 discharge loops
11 capacitance group
12 charge circuits
J1 selects switch
J2 selects switch
J3 selects switch
J4 selects switch
J5 selects switch
J10 selects switch
C1 electric capacity
C2 electric capacity
C3 electric capacity
C4 electric capacity
C5 electric capacity
C10 electric capacity
L1 primary coil
L2 secondary coil
135V DC power anode
1432V DC power anode
15 photoelectrical couplers
169012 type audions
1732V DC power cathode
18 Single Chip Microcomputer (SCM) system (PX is single-chip microcomputer operational pin)
K1 solenoid input
K2 solenoid input
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As it is shown in figure 1, the igniting TT&C system that the present invention becomes ignition energy includes charge circuit 12 and discharge loop 10, wherein,
Charge circuit includes linear DC constant pressure source 1, and it is connected to the first diode D1 between linear DC constant pressure source 1 positive pole and negative pole in turn, first resistance R1, charging control switch 2, second diode D2 and capacitance group 11, specifically, the anode of the first diode D1 is connected with the positive pole A+ of linear DC constant pressure source 1, it is sequentially connected between negative electrode and the anode of the second diode D2 of the first diode D1 and connects the first resistance R1 and charging control switch 2, the negative electrode of the second diode D2 is connected with one end of capacitance group 11, the other end of capacitance group 11 is connected with the negative pole of linear DC constant pressure source 1.
In the present embodiment, linear DC constant pressure source 1 is output voltage of change between 0～400V.Capacitance group 11 is formed in parallel by the electric capacity (C1, C2, C3, C4, C5 ... C10) of different capacitances, each capacitances in series one selects switch (J1, J2, J3, J4, J5 ... J10), in order to regulate the capacitance of connect electric capacity in circuit, electric capacity used adopts polypropylene capactive (CBB electric capacity), switch is selected to adopt mechanical switch, it is possible to be operated manually.
Discharge loop includes capacitance group 11, discharge control switch 3, ignition coil 4, voltage probe 5 and ignitor 6, PC 7, oscillograph 8 and current probe 9, one end of discharge control switch 3 is connected with the negative electrode of the second diode D2, and the other end is connected with one end of primary coil L1 in ignition coil 4.The two ends of ignitor 6 are connected with power cathode with the outfan of secondary coil L2 in ignition coil 4 respectively, the test lead of voltage probe 5 with and the electrode that is connected of secondary coil outfan connect, earth wire clamp is connected with the other end.Current probe 9 accesses in electrode circuit, and voltage probe 5 and current probe 9 gather outfan and be connected with oscillograph 8, and oscillograph 8 is connected with PC 7 by data wire.
Charging control switch 2 used by the present invention and discharge control switch 3 are electromagnetic relay switch, adopt the driving control circuit shown in Fig. 2 to carry out open and close controlling.
In driving control circuit shown in Fig. 2,5V DC power anode 13, through resistance R2, connects photoelectrical coupler 15 at light emitting diode positive pole, and the negative pole of light emitting diode is connected with the operational pin PX of Single Chip Microcomputer (SCM) system 18.Single Chip Microcomputer (SCM) system 18 is connected with PC 7 by serial port module.
The emitter stage of the outfan of photoelectrical coupler 15 is connected with the negative pole 17 of 32V DC source, and colelctor electrode is then connected with resistance R4, is connected with the base stage of 9012 type audions 16 simultaneously.It is connected with the positive pole 14 of 32V DC source after resistance R3 and resistance R4 is connected, the emitter stage of 9012 type audions 16 is connected between resistance R4 and resistance R3, and audion 16 colelctor electrode is connected with any input k1 of solenoid, and it is connected with the negative pole of Zener diode D3.The negative pole 17 of solenoid another input k2 and 32V DC source is connected, and is connected with the positive pole of Zener diode D3.The voltage stabilizing value of Zener diode D3 is identical with relay coil rated operational voltage value.
The process that charging control switch 2 or discharge control switch 3 are carried out open and close controlling by above-mentioned driving control circuit is as follows:
According to requirement of lighting a fire each time, PC 7 sends ignition signal to Single Chip Microcomputer (SCM) system 18 by serial ports, after Single Chip Microcomputer (SCM) system 18 receives this ignition signal, completes the potential change of operational pin PX according to setting program.When operational pin PX is become electronegative potential from high potential (+5V) (0V), the light emitting diode of photoelectrical coupler 15 is connected, make the audion saturation conduction of optocoupler internal output terminal, now the base stage of 9012 type audions 16 is become low potential from high potential, resistance by Proper Match resistance R3 and R4, make 9012 type audion 16 saturation conductions, and make the voltage between two inputs (between K1 and K2) of solenoid equal to its rated operational voltage, now electromagnetic relay adhesive, controls switch Guan Bi.Otherwise, when the operational pin PX of Single Chip Microcomputer (SCM) system 18 is high potential, photoelectrical coupler 15 turns off, and 9012 type audions 16 end so that the voltage between electromagnetic relay input (between K1 and K2) is 0, controls to switch off.
When the present invention is applicable to engine pedestal, DC constant voltage power supply 1 can adopt by a boost rectifying circuit, battery voltage can be converted to a DC constant voltage output, by regulating the turn ratio in on-off control booster circuit, the magnitude of voltage realizing output changes within the specific limits, regulates switch and can adopt mechanical switch.Charging control switch 2 can adopt one-way SCR, and by triggering the conducting of circuit realiration silicon controlled, after capacitance group 11 charging terminates, current over-zero realizes silicon controlled and automatically shuts down.According to the real work requirement of electromotor, trigger instants can being controlled by ECU, controlling thus completing the charging to capacitance group 11.Electric capacity can adopt the polypropylene capactive (CBB electric capacity) of different capacitance, constitutes capacitance group in parallel.Discharge control switch 3 can adopt solid-state relay, controlling drive circuit by ECU and realizes the break-make of solid-state relay, discharging thus completing capacitance group 11, it is achieved igniting in cylinder.When the present invention is applied to constant volume combustion bomb experimental stand, DC constant voltage source 1 can adopt the linear DC power supply of finished product, and 220V (50Hz) alternating current can convert to the output of a range of DC constant voltage.Charging control switch can adopt with discharge control switch and control, with the charge and discharge of employing on electromotor, the type that switch is identical, it would however also be possible to employ high-power magnetic relay.In constant volume combustion bomb experimental stand, it is possible to send triggering signal by PC, realizing the communication with single-chip microcomputer by serial ports, thus controlling the corresponding break-make of charging control switch and discharge control switch, completing to light a fire each time.
The capacitance group 11 of the present invention is to be formed by the Capacitance parallel connection of different capacitances, and each capacitances in series one selects switch, selects the type of switch that standard machinery can be adopted to switch.Energy storage formula according to electric capacity:
Wherein: ECBoth end voltage after the capacitance U electric capacity charging of capacitance energy storage C electric capacity
Change the capacitance C of electric capacity in circuit and the voltage U at electric capacity two ends, such that it is able to change the size of capacitance energy storage.The present invention in ignition process each time, the size of ignition energy, it is possible to by change capacitance group energy storage size realize.When igniting tends towards stability, the energy storage of capacitance group is more many, and the ignition energy in igniting each time is more big, otherwise, then more little.The technical solution adopted in the present invention is to make under the premise that system meets stand requirement, it is ensured that the charging interval long enough of capacitance group so that the voltage at capacitance group two ends is equal to supply voltage.Therefore the capacitance storing output voltage values and capacitance group that energy can pass through to change high voltage power supply of capacitance group realizes.The present invention can pass through to close or disconnect select switch accordingly, it is achieved the capacitance change of capacitance group.The present invention on the engine, can pass through to regulate the turn ratio of booster circuit and realize by the change of output HIGH voltage；In constant volume combustion bomb system, adopt linear DC power supply can realize voltage linear convergent rate in a certain scope.The present invention adopts ignition coil to complete boosting igniting, reduces the requirement for DC constant voltage electric power output voltage.General output voltage, more than 100V, can meet igniting requirement.
The present invention is in ignition process each time, by voltage probe 5 and current probe 6, gathers interelectrode voltage and current signal in discharge process.Voltage probe 5 can adopt high pressure passive probe, and it is measured end and is connected with the outfan of secondary coil, is connected with the electrode other end by earth wire clamp.Current probe 6 accesses the loop that secondary coil is constituted with electrode.Two probes are gathered outfan couple with oscillograph, by data wire, oscillograph 8 and PC 7 are connected.Each time in ignition process, voltage and current signal between acquisition electrode, waveform is presented by oscillograph, and by voltage and current signal gathering in duration the incoming computer of data over time, by voltage interelectrode in discharge time and current data are done integral and calculating, obtain ignition energy value.The computing formula of ignition energy is:
In formula: EIFor ignition energy, t1For the moment that igniting starts, t2For igniting terminate moment, U be igniting during magnitude of voltage, I be igniting during current value；
Owing to the signal of oscillograph actual acquisition is the discrete point in a certain duration, therefore above-mentioned formula can be modified to:
In formula: EIFor ignition energy, t1For the moment that igniting starts, t2For the moment that igniting terminates, u gathers the magnitude of voltage in each moment during being igniting, i gathers the current value in each moment during being igniting, Δ t is the oscillographic sample rate cycle；
After repetitive measurement, obtain the relation between the energy storage of electric capacity and ignition energy, and then obtain EC-EICurve, completes the demarcation to the present invention.When a certain ignition energy of needs, according to EC-EICurve, it is possible to the energy storage value of coarse adjustment electric capacity, makes ignition energy close to desired value.By the actual ignition energy value recorded, then the energy storage value of fine tuning electric capacity, so that actual ignition energy approximation convergence is required ignition energy.Both can be realized by technique scheme becoming energy igniting, it is also possible to regulate the size of ignition energy on demand, and then for measuring the minimum ignition energy of fuel.
The work process of the igniting TT&C system of the variable ignition energy of the present invention is as follows:
By writing control program, it is achieved Single-chip Controlling completes following process: when PC 7 sends ignition signal, Single Chip Microcomputer (SCM) system 18 performs corresponding program, it is achieved charging control switch 2 closes a period of time, completes the charging to capacitance group 11.After capacitance group 11 charging complete, charging control switch 2 disconnects, and discharge control switch 3 closes, and capacitance group 11 completes electric discharge, and produces an instantaneous high pressure, the combustion mixture between perforation ignition electrode 6 at secondary coil L2 outfan, completes igniting.
Each time in ignition process, voltage probe 5 and current probe 9 gather the analogue signal of voltage and electric current between ignitor 6 respectively, and in its incoming oscillograph 8, will complete the collection to Wave data and show with waveform.By the incoming PC 7 of data that oscillograph 8 is stored by data wire, the voltage on the electric discharge period and electric current are integrated computing by PC 7, and then obtain this ignition energy value.According to the needs gathering waveform, regulate the display amplitude range of the longitudinal form of oscillograph 8 and the record time span of horizontal form, it is ensured that gather the complete of data each time.
As a kind of preferred implementation of the present invention, before igniting each time, it is possible to coordinate the voltage output in linear adjustment DC constant voltage source 1 and the capacitance of capacitance group 11, it is achieved the change of capacitance group energy storage.The voltage-regulation of linear DC constant pressure source 1 can adopt its adjusting knob carried to carry out linear regulation, and the capacitance of capacitance group 11 can be passed through to select the opening and closing of switch (J1, J2, J3, J4, J5 ... J10) to be adjusted.When only the first selection switch J1 and the second selects switch J2 Guan Bi, the capacitor's capacity in circuit is the first electric capacity C1 and the capacitance sum of the second electric capacity C2.By that analogy, it is possible to as requested, the selection switch of Guan Bi corresponding capacitance, thus the capacitance size of electric capacity in control circuit.When needing higher point fire energy, it is possible to increase the output voltage values of linear constant pressure source 1 and the capacitance of capacitance group 11, improving the energy storage value of electric capacity, raising thus realizing ignition energy.Each time in ignition process, by regulating capacitance energy storage value, it is achieved the change of ignition energy, the size according to Real-time Collection Yu calculated ignition energy, and then can be implemented in the research ignition energy impact on combustion characteristics on constant volume combustion bomb stand.
The energy storage of electric capacity controls at a certain steady state value, and by repeatedly lighting a fire, ignition energy can tend in a certain stability range, and then this ignition system can complete a demarcation, obtains the energy storage of electric capacity and the variation relation of ignition energy.By this relation curve, can the energy storage size of coarse adjustment electric capacity as required, and by real-time calculated ignition energy value, the energy storage size of fine tuning electric capacity, so that ignition energy tends to required energy value, it is possible to use the minimum ignition energy of fuel measured by constant volume combustion bomb stand.
Draw through experiment: the output voltage of linear adjustment constant pressure source 1 is 100V, and the capacitance of capacitance group 11 is 0.978uF, after measurement of repeatedly lighting a fire, calculate the size obtaining ignition energy and tend to 2.3mJ.The output voltage of linear adjustment constant pressure source 1 is 200V, and the capacitance of capacitance group 11 is 0.978uF, after measurement of repeatedly lighting a fire, calculates the size obtaining ignition energy and tends to 7.4mJ.The output voltage of linear adjustment constant pressure source 1 is 300V, and the capacitance of capacitance group 11 is 0.978uF, after measurement of repeatedly lighting a fire, calculates the size obtaining ignition energy and tends to 15.6mJ.The output voltage of linear adjustment constant pressure source 1 is 400V, and the capacitance of capacitance group 11 is 0.978uF, after measurement of repeatedly lighting a fire, calculates the size obtaining ignition energy and tends to 25.5mJ.It follows that by changing capacitance energy storage value size, it is possible to achieve the adjustment of ignition energy, and tend to some particular value at specific capacitance energy storage value down-firing energy.
Claims (6)
1. the igniting TT&C system becoming energy, it is characterised in that: include charge circuit, discharge loop and control described charge circuit, driving control circuit, voltage probe, current probe, ignitor, oscillograph and PC that discharge loop charges and discharges；
Described charge circuit includes: linear DC constant pressure source, and is connected to the first diode between linear DC constant pressure source positive pole and negative pole, the first resistance, charging control switch, the second diode and capacitance group in turn；The anode of described first diode is connected with the positive pole of linear DC constant pressure source, it is sequentially connected between negative electrode and the anode of the second diode of the first diode and connects the first resistance and charging control switch, the negative electrode of the second diode is connected with one end of capacitance group, and the other end of capacitance group is connected with the negative pole of linear DC constant pressure source；Described linear DC constant pressure source output voltage of change between 0～400V；Described capacitance group is formed by the Capacitance parallel connection of different capacitances, and each capacitances in series one selects switch, and in order to regulate the capacitance of connect electric capacity in circuit, electric capacity used is polypropylene capactive, and selection used switch is mechanical switch；
Described discharge loop includes described capacitance group, discharge control switch, ignition coil and ignitor, one end of described discharge control switch is connected with the negative electrode of the second diode, the other end is connected with one end of primary coil in ignition coil, and the two ends of ignitor are connected with power cathode with the outfan of secondary coil in ignition coil respectively；The test lead of described voltage probe connects with the one end of the electrode that secondary coil outfan in ignition coil is connected, and earth wire clamp is connected with the other end of electrode；Current probe accesses in electrode circuit, and the collection outfan of voltage probe and current probe is connected with oscillograph respectively, and oscillograph is connected with PC by data wire；
Described driving control circuit includes 5V DC source, 32V DC source, photoelectrical coupler, Single Chip Microcomputer (SCM) system, audion and Zener diode, the positive pole of described 5V DC source is through resistance R2, connecting the photoelectrical coupler positive pole in light emitting diode side, the negative pole of light emitting diode side is connected with the operational pin PX needed for Single Chip Microcomputer (SCM) system；Single Chip Microcomputer (SCM) system is connected with PC by serial port module；The emitter stage of the audion of photoelectrical coupler internal output terminal is connected with the negative pole of 32V DC source, and colelctor electrode is then connected with resistance R4, is connected with the base stage of external audion simultaneously；It is connected with the positive pole of 32V DC source after resistance R3 and resistance R4 series connection, the emitter stage of external audion is connected between resistance R4 and resistance R3, external transistor collector is connected with any input k1 of the solenoid in charging control switch and discharge control switch, and is connected with the negative pole of Zener diode；The negative pole of solenoid another input k2 and 32V DC source is connected, and is connected with the positive pole of Zener diode.
2. become the igniting TT&C system of energy according to claim 1, it is characterized in that: when described igniting TT&C system is located on engine pedestal, described linear DC constant pressure source includes the boost rectifying circuit being connected with automobile storage battery, and for controlling the adjustment switch of turn ratio in boost rectifying circuit；Charging control switch includes one-way SCR and for controlling the triggering circuit of one-way SCR, and described triggering circuit is connected with Engine ECU；Described discharge control switch is solid-state relay and the driving control circuit of solid-state relay connection, and described driving control circuit is connected with Engine ECU.
3. become the igniting TT&C system of energy according to claim 1, it is characterised in that: when described igniting TT&C system is on constant volume combustion bomb experimental stand, described linear DC power supply for converting required DC voltage to by civil power；Described charging control switch and discharge control switch are and the high-power magnetic relay driving control circuit to be connected drive control circuit to be controlled by Single Chip Microcomputer (SCM) system, and Single Chip Microcomputer (SCM) system is attached by serial ports and PC.
4. the investigating method of the igniting TT&C system becoming energy according to claim 1, it is characterised in that comprise the following steps:
(1) when PC sends ignition signal, Single Chip Microcomputer (SCM) system controls charging control switch and closes a period of time, until completing the charging to capacitance group；Making the voltage at capacitance group two ends equal to electric power output voltage, after capacitance group charging complete, charging control switch disconnects, discharge control switch closes, and capacitance group is discharged, and produces an instantaneous high pressure at secondary coil outfan, the interelectrode combustion mixture of perforation ignition, completes igniting；
(2) in ignition process, voltage probe and current probe collection point thermoelectricity voltage across poles and current signal respectively, and in its incoming oscillograph, the collection to Wave data will be completed and show with waveform；
(3), after PC receives oscillographic data by data wire, the voltage on the electric discharge period and electric current are integrated computing, and then obtain this ignition energy value；
(4) according to required ignition energy, the output voltage values of linear constant pressure source and the capacitance of capacitance group are controlled, thus realizing controlling ignition energy.
5. become the investigating method of the igniting TT&C system of energy according to claim 4, it is characterised in that:
Voltage interelectrode in discharge time and current data being done integral and calculating, obtains ignition energy value, the computing formula of ignition energy is:
In formula: EIFor ignition energy, t1For the moment that igniting starts, t2For igniting terminate moment, U be igniting during magnitude of voltage, I be igniting during current value；
Owing to the signal of oscillograph actual acquisition is the discrete point in a certain duration, therefore above-mentioned formula is deformed into:
In formula: EIFor ignition energy, t1For the moment that igniting starts, t2For the moment that igniting terminates, u gathers the magnitude of voltage in each moment during being igniting, i gathers the current value in each moment during being igniting, Δ t is the oscillographic sample rate cycle；
By repetitive measurement, obtain the energy storage E of electric capacitycWith ignition energy EIBetween relation, and then E can be obtainedC-EICurve, when a certain ignition energy of needs, according to EC-EICurve, the energy storage value of coarse adjustment electric capacity, make ignition energy close to needing energy value；By the actual ignition energy value recorded, then the energy storage value of fine tuning electric capacity, so that actual ignition energy approximation convergence is required ignition energy.
6. according to claim 4 or 5, become the investigating method of the igniting TT&C system of energy, it is characterised in that in described step (1), Single Chip Microcomputer (SCM) system controls specifically comprising the following steps that of charging control switch and discharge control switch
PC sends ignition signal to Single Chip Microcomputer (SCM) system by serial ports, after Single Chip Microcomputer (SCM) system receives this ignition signal, completes the potential change of operational pin PX according to setting program；When operational pin PX is become electronegative potential from high potential, the light emitting diode of photoelectrical coupler is connected, make the audion saturation conduction of photoelectrical coupler internal output terminal, now the base stage of external audion is become low potential from high potential, resistance by build-out resistor R3 and R4 so that external audion saturation conduction, and make the voltage between two inputs of solenoid equal to its rated operational voltage, now electromagnetic relay adhesive, charging control switch or discharge control switch Guan Bi；Otherwise, when the operational pin PX of Single Chip Microcomputer (SCM) system is high potential, photoelectrical coupler turns off, and external audion ends so that the voltage between electromagnetic relay input is 0, and charging control switch or discharge control switch disconnect.
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| CN106704076A (en) * | 2015-11-18 | 2017-05-24 | 联合汽车电子有限公司 | Ignition system with high pressure stabilization energy storage device |
| CN107192735B (en) * | 2017-06-12 | 2019-08-09 | 公安部天津消防研究所 | A kind of adjustable extrahigh energy diffusion ignition energy generating device and control method |
| CN111456867B (en) * | 2020-04-08 | 2021-08-17 | 江苏深蓝航天有限公司 | Ignition device suitable for simultaneous explosion of multi-channel initiating explosive devices |
| CN112128798A (en) * | 2020-09-27 | 2020-12-25 | 上海交通大学 | Ignition device with controllable energy, pulse width and frequency |
| CN112628050B (en) * | 2020-12-18 | 2022-08-19 | 陕西航空电气有限责任公司 | Withstand voltage value determination method for boost capacitor of aircraft engine ignition circuit |
| CN112378995B (en) * | 2021-01-14 | 2021-04-30 | 矿冶科技集团有限公司 | Electric spark generating device, energy testing device and electric spark generating system |
| CN112761845B (en) * | 2021-01-20 | 2022-08-12 | 联合汽车电子有限公司 | Ignition coil output energy assessment method and test system thereof |
| CN113865784A (en) * | 2021-09-26 | 2021-12-31 | 成都国光电气股份有限公司 | Wide-range thermocouple vacuum gauge |
| CN114320610A (en) * | 2021-12-13 | 2022-04-12 | 陕西航空电气有限责任公司 | Alternating-current energy-conversion ignition circuit and energy conversion method for aero-generator |
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