CN109326067A - A kind of electronic starting circuit - Google Patents
A kind of electronic starting circuit Download PDFInfo
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- CN109326067A CN109326067A CN201811462975.0A CN201811462975A CN109326067A CN 109326067 A CN109326067 A CN 109326067A CN 201811462975 A CN201811462975 A CN 201811462975A CN 109326067 A CN109326067 A CN 109326067A
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- Prior art keywords
- circuit
- foot
- feet
- terminal
- order
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
- F41C3/00—Pistols, e.g. revolvers
- F41C3/04—Starting pistols; Alarm pistols
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
This application discloses a kind of electronic starting circuits, including 12V battery, 5V voltage regulator circuit, booster circuit, sound circuit, audio power amplifier circuit, microprocessor module, LED flash, loudspeaker and key of issuing an order.The 12V battery is connected to voltage regulator circuit, booster circuit and LED flash, voltage regulator circuit output 5V is connected to sound circuit and microprocessor module, booster circuit exports double 40V and is connected to audio frequency power amplifier, and audio frequency power amplifier output is connected to loudspeaker, issues an order by being keyed to microprocessor module.Microprocessor module exports 3 tunnels control signal and is connected respectively to sound circuit, audio frequency power amplifier and LED flash.Sound of the invention, light signal strength of issuing an order can achieve the effect that gunpowder starting pistol, and extend the working time under the premise of not increasing accumulator capacity and weight.The present invention has rational design, at low cost, high-efficient, practical, convenient for promoting the use of.
Description
Technical field
The present disclosure relates generally to electronic technology fields, and in particular to a kind of electronic starting circuit.
Background technique
Traditional gunpowder starting pistol is the instrument that starting singal is issued in athletic competition, it is by firing dedicated bullet hair
Starting singal out, starting singal include two aspects: voice signal and the smog of gunpowder explosion moment when gunpowder explosion (dodge
Light) signal.Starting singal of the voice signal as sportsman, flashing signal is as clock commencing signal, voice signal and flash of light
Signal is synchronous to be generated, and the explosive sound signal intensity that gunpowder starting pistol issues is very big, but the duration is extremely short that (actual measurement is no more than
400ms)。
And have substantive difference in existing technology and the present invention, it is respectively compared as follows:
1, patent: a kind of electronic starting pistol CN201721907069.8 is that sounding and flash of light electricity are arranged in gun shaped shell
Road, space is too small in gun shaped shell, and be unable to hold large-capacity battery and high-power circuit, determine sound that this design issues,
Light signal strength is too low, at all can not be compared with the sound and optic signal intensity that electronic starting circuit of the present invention generates.
2, patent: a kind of novel electron sound light commanding rifle CN201720275096.1 is that sounding electricity is arranged in gun shaped shell
Road, space is too small in gun shaped shell, and the signal strength of issuing an order of generation is too low, can not generate with electronic starting circuit of the present invention
Sound and optic signal intensity compare.
3, patent: a kind of power supply device for electronic starting pistol and a kind of wireless electron starting system
The sound and optic signal intensity that the electronic starting pistol part of the CN201720215138.2 patent issues is too small, can not be with institute of the present invention
The sound and optic signal intensity for stating the generation of electronic starting circuit compares.
4, patent: the sound and optic signal that the starting apparatus of starting apparatus and system the CN201621446756.X patent issues
Intensity is too small, can not be compared with the sound and optic signal intensity that electronic starting circuit of the present invention generates.
5, patent: a kind of electronic starting apparatus CN201621381143.2 patent is to discharge air blast using pressure gas tank
So that horn-like gas outlet is issued acoustical signal, belongs to mechanical system and issue an order, and the present invention is issued an order by circuit, working method and original
It manages entirely different.
6, patent: a kind of novel starting pistol CN201621270018.4 patent is that sounding electricity is arranged in gun shaped shell
Road, space is too small in gun shaped shell, and the signal strength of issuing an order of generation is too low, can not generate with electronic starting circuit of the present invention
Sound and optic signal intensity compare.
7, patent: a kind of starting pistol CN201620344021.X of the match patent is that compression is arranged in gun shaped shell
Air belongs to mechanical system and issues an order, with working method and principle of the invention using compressed air air blast by copper pipe sounding
It is entirely different.
8, patent: the starting pistol CN201530298075.8 patent is that phonation circuit is arranged in gun shaped shell, gun shaped shell
Internal space is too small, and the signal strength of issuing an order of generation is too low, and sound, the light that can not be generated with electronic starting circuit of the present invention are believed
Number intensity compares.
9, patent: starting starting apparatus CN201420653400.8, issuing an order for the patent is hinged using two
Issue an order when plate crashes and issue acoustical signal, belongs to mechanical system and issue an order, and the present invention is issued an order by circuit, working method and principle
It is entirely different.
10, patent: the starting pistol CN201420329785.2 of the track and field events patent is that hair is arranged in gun shaped shell
Acoustic-electric road, space is too small in gun shaped shell, and the signal strength of issuing an order of generation is too low, can not be with electronic starting circuit of the present invention
The sound and optic signal intensity of generation compares.
11, patent: the issue an order stick CN201420154039.4 patent of switch control acousto-optic type is arranged in rodlike shell
Phonation circuit, space is too small in gun shaped shell, and the signal strength of issuing an order of generation is too low, can not be with electronic starting electricity of the present invention
The sound and optic signal intensity that road generates compares.
12, patent: a kind of electronic acoustooptic starting pistol CN201320782976.X patent is that hair is arranged in gun shaped shell
Acoustic-electric road, space is too small in gun shaped shell, and the signal strength of issuing an order of generation is too low, can not be with electronic starting circuit of the present invention
The sound and optic signal intensity of generation compares.
13, a kind of patent: wired time set CN201310093404.5 patent needs of issuing an order for timing of running
Fixed bracket is built at the scene, and structure includes pedestal, column, steel wire tow line etc., and mechanical structure is excessively complicated, installs and uses not side
Just.
14, patent: a kind of starting apparatus CN201210584707.2 patent needs to build fixed bracket, structure at the scene
Including pedestal, column, steel wire tow line etc., mechanical structure is excessively complicated, installs and uses inconvenience.Microphone and amplification are used on circuit
Circuit connects loudspeaker sounding, the sound of starting pistol is not achieved completely, light is issued an order effect.
15, patent: electronic starting apparatus [disclosure] CN201110396834.5 effect of issuing an order is not significant, signal strength of issuing an order
It is too low.
16, patent: electronic starting apparatus CN201120497628.9 issues an order, and effect is not significant, and signal strength of issuing an order is too low.
17, patent: the effect of issuing an order of the Delayed starting gun CN200610125863.7 for athletic competition is not significant, hair
Enable signal strength too low.
18, patent: Delayed starting gun CN200520044681.8 effect of issuing an order is not significant, issues an order signal strength too
It is low.
19, patent: Electric starting gun CN00226315.7 issues an order, and effect is not significant, and signal strength of issuing an order is too low.
20, patent: sound of issuing an order, the light that the sub- sound light commanding device CN95232166.1 patent of sport timing race generates
Signal strength is too low, can not be compared with the sound and optic signal intensity that electronic starting circuit of the present invention generates.
21, patent: the electronic starting pistol CN89208064.7 patent is setting simulation shot, flash of light electricity in gun shaped shell
Road, space is too small in gun shaped shell, and the signal strength of issuing an order of generation is too low, can not generate with electronic starting circuit of the present invention
Sound and optic signal intensity compare.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of electronic starting circuit.
According to technical solution provided by the present application: a kind of electronic starting circuit, including 12V battery, 5V voltage regulator circuit, liter
Volt circuit, sound circuit, audio power amplifier circuit, microprocessor module, LED flash, loudspeaker and key of issuing an order, the 12V
Battery is connect with the 5V voltage regulator circuit, booster circuit and LED flash respectively, is divided on the pin of the microprocessor module
It is not connected to the sound circuit, audio power amplifier circuit, issue an order key and LED flash, is connected on the audio power amplifier circuit
The sound circuit, loudspeaker, booster circuit, microprocessor module in parallel between the voltage regulator circuit and sound circuit,
The 5V voltage regulator circuit is connect with sound circuit.
In the present invention, into once, the 12V battery positive voltage is connected to the VBat terminal of the 5V voltage regulator circuit, 12V
It is that voice circuit module of electric and microprocessor module are powered that voltage, which generates 5V voltage through three terminal regulator LM7805, C35 and C36, C37
Input, output filter capacitor with C38 for voltage regulator circuit.
In the present invention, into once, for the booster circuit using SG3525 as the pwm control circuit of core, SG3525 is one
A function admirable, multiple functional, versatile single-chip integration PWM controller, 1. foot is the inverting input terminal of error amplifier,
Final output voltage terminal VDD is connected to by resistance R12, potentiometer RV1 is for adjusting feedback voltage, finally by output voltage
VDD is controlled in 40V, meanwhile, 1. foot, composition integral form partial pressure are 9. connected to by the parallel circuit of R14 and C26 outside foot
Circuit is adjusted, 2. foot is the non-inverting input terminal of error amplifier, is connected to the base provided by 16 foot internal circuits by resistance R13
On quasi- voltage, 5. foot and 6. foot is timing capacitor and the timing resistor connecting pin of PWM oscillator, is separately connected timing capacitor C27
With timing resistor R16,7. foot is the discharge end of timing capacitor, is connected to 5. foot by resistance R15, constitutes the discharge loop of C27,
8. foot is soft start end, for external C42 to ground, 12 feet are ground terminals, and 15 feet are the working power ends of chip, are connected to 12V electric power storage
The positive end VBat in pond, external connection C29 and C30 are used to do power filter, and 13 feet are the collectors of pwm pulse efferent duct, are led to
It crosses R17 and is connected to 15 foot of power end, C33 and C34 constitute the filter capacitor of 13 feet, and 11 feet and 14 feet of SG3525 are pushing away for PWM
Output end is drawn, the end OutA and OutB is connected respectively to, the end OutA is connected to the base stage of triode T5 and T6, OutB through resistance R24
End is connected to the base stage of triode T7 and T8 through resistance R25, and the push-pull circuit that T5 and T6 are constituted is used to drive inversion through resistance R19
What the push-pull circuit that switch transistor T 4, T7 and T8 are constituted drove inverse switch pipe T3, T3 and T4 selection through resistance R20 is big function
Rate MOSFET constitutes push-pull type inverter output circuit, and TR1 is that inversion exports transformer, and armature winding centre cap is through insuring
Pipe FU1 is connected to the end 12V battery positive voltage VBat, and BR1 is the fast recovery rectifier bridge of inverting output terminal, capacitor C31, C32, C43 structure
At+40V power filter, capacitor C39, C40, C44 composition -40V power filter.
In the present invention, into once, the sound circuit is using ISD1820 as core, and 10. the R27=100k of foot, is external
Oscillation resistance determines that recording sampling frequency is 6.4kHz, the external light emitting diode D1 of the RECLED terminal of 13 feet and current-limiting resistance
R28 constitutes record indicator circuit, starts to record after pressing 1. foot REC key, and recorded audio signals source is from 4. foot and 5. foot is external
Microphone MIC, R29, R30, R31, C50 are microphone power supply circuit, provide suitable operating voltage for microphone, 6. the external C47 structure of foot
At the AGC filter capacitor of recording circuit, automatic gain control circuit (AGC) controls the gain of preamplifier, extension record in piece
The dynamic range of sound signal promotes recording quality, and C46 is 5V power filtering capacitor, and 2. foot is PLAYE terminal, has edge touching
Sound function is provided, when rising edge occurs in this terminal, chip starts to finish full section voice rear chip automatically into economize on electricity shape
State, the two terminal outputs of foot from 7. foot and 9. of the starting pistol sound signal of broadcasting；
In the present invention, into once, 18 foot VSSA of TDA8954J chip in the audio power amplifier circuit are simulation electricity
Source voltage cathode is connect with booster circuit output terminal VSS, provides the supply voltage of -40V, and C20 is power filtering capacitor, and 20
Foot VDDA is analog power positive polarity, is connect with booster circuit output terminal VDD, and the supply voltage of+40V is provided, and C21 is electricity
Source filter capacitor, 19 foot SGND are for input signal；2 foot IN1P of TDA8954J chip are channel audio input anode, 3 feet
IN1M is that a channel audio inputs cathode, and 22 foot IN2P are two channel audios input anode, and 21 foot IN2M are that two channel audios are defeated
Enter cathode, the present invention is connected to IN+ terminal using double passage differential input mode, by IN1P and IN2M, believes as audio
The positive input terminal in number source, is connected to IN- terminal for IN1M and IN2P, as the negative input end of audio signal source, capacitor C1, C2,
C3, C4 are audio signal input coupling capacitor；
In the present invention, into once, for the microprocessor module using AT89C52 as core, 40 feet are+5V power end, 20
Foot is ground terminal, 18 feet and the external crystal oscillator of 19 feet, and crystal oscillator frequency 11.0592MHz, C51 and C52 are the shunt capacitance of crystal oscillator,
R34, C53 and key RST constitute the reset circuit of microprocessor, and 12 feet of microprocessor AT89C52 are key test side of issuing an order,
10 feet, 11 feet, 21 feet, 25 feet of microprocessor are output end, and original state is low level, R35, C54 and key START structure
At key circuit of issuing an order, the key START that issues an order presses moment, generates a rising edge electric signal and acts on microprocessor
12 feet of AT89C52, microprocessor is on the basis of the rising edge of the 12 foot signals of T89C52.
In the present invention, into once, for the LED flash by 12V storage battery power supply, metal-oxide-semiconductor T9 is the electricity for controlling LED light
Sub switch, T10 are the driving buffer stage of electronic switch T9.When the end SWLED from microprocessor module is high level, warp
T10 is connected in R32, the transmitting of T10 extremely high level, and the emitter of T10 and the grid of T9 connect, and then metal-oxide-semiconductor T9 is driven to lead
Logical, the flat superbright LED array lamp of 12V shines.After moment shines, the end SWLED becomes low level, and T9, T10 end, and LED gusts
Column lamp extinguishes.
In the present invention, into once, the key of issuing an order is using rising edge triggering mode, when pressing the key START that issues an order
Afterwards, microprocessor is immediately detected the terminal and rising edge signal occurs, and microprocessor will export multiple control signal in due course, control
Circuit each unit of issuing an order is worked in coordination, issue an order voice signal and synchronization flash signal.
In the present invention, into once, the microprocessor module generates several controls of PLAYE, MODE, SWLED, TIME
Signal.
The present invention is entirely the sound for reaching gunpowder starting pistol by electronic circuit, light effect.
12V battery and 5V voltage regulator circuit are the power supply of system each unit circuit.The language of preparatory typing starting pistol sound signal
Sound circuit is the sound source of circuit of issuing an order.Battery 12V single supply is transformed to ± 40V dual power supply by booster circuit, is audio frequency power amplifier
Circuit power supply.Audio power amplifier circuit is the efficient D class audio frequency amplification circuit using TDA8954J as core, using BTL circuit
Mode, moment export peak power greatly (400W).Issue an order by key pressing moment, circuit enters starting work state, audio function
Electric discharge road drive the speaker is issued an order sound, while the strong optical signal synchronous with voice signal by high-brightness LED lamp sending.
Voice signal and optical signal simulate the sound of gunpowder starting pistol completely, meet the habit of user.
Starting pistol is single work, is intermittently used.According to this feature, circuit of the present invention only has the microprocessor of power consumption very little
In long-term work state, other circuits are only in moment work of issuing an order, also, microprocessor control each unit electricity after every task
Road enters low-power consumption standby dormant state, and the operation of issuing an order of next time is waited to extend the work of battery to reduce the total power consumption of circuit
Make the time.Without accessing AC power source in use site, convenient for arbitrarily being moved on sports ground.The configuration of the present invention is simple, design are closed
Reason, it is convenient and at low cost to realize, high-efficient, practical, convenient for promoting the use of.
In conclusion the application's the utility model has the advantages that
1, electronic starting circuit of the present invention generates very high sound and the synchronization flash of issuing an order of intensity with electronic circuit
Signal.Sound and optic signal intensity can achieve the effect that gunpowder starting pistol, but completely without using explosives such as gunpowder.It can replace completely
Traditional gunpowder starting pistol.
2, according to real work needs, circuit of the present invention issues an order the time for 400ms, after once issuing an order at circuit every time
8s is kept in Low-power-consumptiodormancy dormancy mode, receives new operation of issuing an order, just later to save the electricity of battery to greatest extent.Not
The working time is extended under the premise of increasing accumulator capacity and weight.The present invention has rational design, at low cost, high-efficient, practical
Property it is strong, convenient for promote the use of.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is circuit composition block diagram of the invention；
Fig. 2 is the schematic diagram of 5V voltage regulator circuit；
Fig. 3 is the schematic diagram of booster circuit core；
Fig. 4 is the schematic diagram of booster circuit Converting Unit；
Fig. 5 is the schematic diagram of sound circuit；
Fig. 6 is the schematic diagram of audio power amplifying circuit；
Fig. 7 is the schematic diagram of LED flash control circuit
Fig. 8 is the circuit diagram of microprocessor module.
Specific embodiment
The application 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 related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Electronic starting circuit include 12V battery, 5V voltage regulator circuit, sound circuit, booster circuit, audio power amplifier circuit,
Microprocessor module, LED flash, loudspeaker and key of issuing an order composition.
1, battery
Select 12V, the common lead-acid accumulator of 17AH.
2, voltage regulator circuit
Such as Fig. 2.12V battery positive voltage is connected to VBat terminal, and 12V voltage generates 5V voltage through three terminal regulator LM7805
It powers for voice circuit module of electric and microprocessor module.C35 and C36, C37 and C38 are the input of voltage regulator circuit, output filtered electrical
Hold.
3, SG3525 booster circuit
Battery 12V single supply is transformed to the bis- electricity of ± 40V by the booster circuit formed using SG3525 integrated circuit as core
Source powers by power storage in the energy-storage capacitor of ± 40V for audio power amplifier circuit, guarantees that audio power amplifier circuit moment is defeated
Power reaches 400W out.It is primary it is of short duration issue an order after (through actual test, signal of issuing an order persistently is no more than 400ms), other
In a dormant state (setting dormancy time 8 seconds), up voltage circuit is the energy storage of 40V dual power supply using this dormancy time section to circuit
Capacitor charging carries out power reserves to generate sound light commanding signal next time.It cannot issue an order in 8 seconds dormancy time sections
(in real work, starting pistol just starts next group of operation of issuing an order at least space-number ten seconds after issuing an order once).Using for a long time
The selection of charging energy-storing (8 seconds or more), short time (400 milliseconds) high-power output, capacity and power to battery requires drop
It is low, be conducive to the volume and weight for reducing battery.Complete circuit such as Fig. 3 and Fig. 4.
Fig. 3 is booster circuit control core part, is the pwm control circuit using SG3525 as core, SG3525 is one
Function admirable, multiple functional, versatile single-chip integration PWM controller.1. foot is the inverting input terminal of error amplifier, lead to
It crosses resistance R12 and is connected to final output voltage terminal VDD, potentiometer RV1 is for adjusting feedback voltage, finally by output voltage VDD
Control is in 40V.Meanwhile 1. foot is 9. connected to by the parallel circuit of R14 and C26 outside foot, composition integral form partial pressure is adjusted
Economize on electricity road.2. foot is the non-inverting input terminal of error amplifier, the benchmark provided by 16 foot internal circuits is connected to by resistance R13
On voltage.5. foot and 6. foot are timing capacitor and the timing resistor connecting pin of PWM oscillator, be separately connected timing capacitor C27 and
Timing resistor R16.7. foot is the discharge end of timing capacitor, 5. foot is connected to by resistance R15, constitutes the discharge loop of C27.⑧
Foot is soft start end, external C42 to ground.12 feet are ground terminals.15 feet are the working power ends of chip, are connected to 12V battery
The positive end VBat, external connection C29 and C30 be used to do power filter.13 feet are the collectors of pwm pulse efferent duct, are passed through
R17 is connected to 15 foot of power end, and C33 and C34 constitute the filter capacitor of 13 feet.
11 feet of SG3525 and 14 feet are the push-pull output end of PWM, the OutA and OutB being connected respectively in Fig. 4 in Fig. 3
End.
OutA in Fig. 4 is connected to the base stage of triode T5 and T6 through resistance R24, and the end OutB is connected to three through resistance R25
The base stage of pole pipe T7 and T8.The push-pull circuit that T5 and T6 is constituted is used to that inverse switch pipe T4, T7 and T8 is driven to constitute through resistance R19
Push-pull circuit through resistance R20 be used to drive inverse switch pipe T3.T3 and T4 selection is high-power MOS FET, constitutes push-pull type
Inverter output circuit, TR1 are that inversion exports transformer, and armature winding centre cap is connected to 12V battery through protective tube FU1
The positive end VBat.
BR1 is the fast recovery rectifier bridge of inverting output terminal, capacitor C31, C32, C43 composition+40V power filter.Capacitor C39,
C40, C44 composition -40V power filter.
4, voice circuit module of electric
The effect of voice circuit module of electric is to provide the sound source for signal of issuing an order, such as Fig. 5.It is with audio record circuit ISD1820
Core, 10. the R27=100k of foot, is external oscillation resistance, determines that recording sampling frequency is 6.4kHz.The RECLED terminal of 13 feet
External light emitting diode D1 and current-limiting resistance R28 constitutes record indicator circuit, starts to record after pressing 1. foot REC key, records
Sound signal source comes from 4. foot and 5. foot external microphone MIC.R29, R30, R31, C50 are microphone power supply circuit, provide conjunction for microphone
Suitable operating voltage.6. the external C47 of foot constitutes the AGC filter capacitor of recording circuit, automatic gain control circuit (AGC) control in piece
The gain of preamplifier processed extends the dynamic range of recorded audio signals, promotes recording quality.C46 is 5V power filtering capacitor.②
Foot is PLAYE terminal, has edging trigger player function, when rising edge occurs in this terminal, chip starts to play full section voice
Finish (typing starting pistol sound signal in advance) afterwards chip automatically into electricity-saving state.The starting pistol sound signal of broadcasting from
7. the two terminal outputs of foot and 9. foot, are connected to the input terminal IN+ and IN- of audio power amplifying circuit shown in fig. 5.
The rising edge trigger signal that the PLAYE terminal that control voice plays needs is provided by microprocessor module.
5, TDA8954J audio power amplifying circuit
Complete circuit such as Fig. 6.TDA8954J is high efficiency D-type audio power amplifier.When operating voltage be ± 40V,
, it can be achieved that the high power of 400W is defeated when double passage differential input, composition bridge-type BTL amplifier, selection loudspeaker impedance RL=4 Ω
Out.And high-efficient, quiescent current very little has the defencive functions such as overvoltage protection, output overcurrent limitation.
18 foot VSSA of TDA8954J chip are analog power voltage cathode, connect, mention with booster circuit output terminal VSS
For the supply voltage of -40V, C20 is power filtering capacitor.20 foot VDDA are analog power positive polarity, are exported with booster circuit
Terminal VDD connection, provides the supply voltage of+40V, and C21 is power filtering capacitor.19 foot SGND are for input signal.
2 foot IN1P of TDA8954J chip are channel audio input anode.3 foot IN1M are that channel audio input is negative
Pole.22 foot IN2P are two channel audios input anode.21 foot IN2M are that two channel audios input cathode.The present invention is using double
IN1P and IN2M are connected to IN+ terminal by channel difference input mode, as the positive input terminal of audio signal source, by IN1M and
IN2P is connected to IN- terminal, the negative input end as audio signal source.Capacitor C1, C2, C3, C4 are audio signal input coupling
Capacitor.
23 foot MODE of TDA8954J chip are the operating mode control terminals of chip, this terminal can control chip operation to
Machine, mute or operating mode.MODE signal is from microprocessor module.
5 ends foot OSCREF are connected to after the outer connecting resistance R3 of 1 foot OSC of TDA8954J chip, PWM is determined by the resistance value of R3
Working frequency.
Two channels of TDA8954J respectively work independently, and two channels all use field-effect tube to make output stage.8 feet
VDDP1 is the positive power source terminal of a channel power amplifier output stage, is connect with booster circuit output terminal VDD, and the power supply electricity of+40V is provided
Pressure, C5 is power filtering capacitor.11 foot VSSP1 are the negative power end of a channel power amplifier output stage, with booster circuit output terminal
VSS connection, provides the supply voltage of -40V, and C6 and C41 are power filter.
16 foot VDDP2 of TDA8954J chip are the positive power source terminal of two channel power amplifier output stages, with booster circuit output end
Sub- VDD connection, provides the supply voltage of+40V, and C15 is power filtering capacitor.13 foot VSSP2 are two channel power amplifier output stages
Negative power end is connect with booster circuit output terminal VSS, provides the supply voltage of -40V, and C16 and C17 are power filter.
The DIAG1 of 4 foot of the TDA8954J chip and DIAG2 of 6 feet is the diagnosis output end in a channel and two channels, core respectively
Be open-drain structure inside piece, so, outside+5V power end is connected to by pull-up resistor R1 and R2 respectively.12 feet
STAB1 connection capacitor C19 is the power supply decoupling capacitance of chip interior logic circuit.The external C18 of the PROT of 7 feet is that chip interior is protected
The power supply decoupling capacitance of protection circuit.The end the BOOT1 connection capacitor C7 of 9 feet is the bootstrap capacitor of a channel power amplifier output stage, 15 feet
The end BOOT2 connection capacitor C8 be two channel power amplifier output stages bootstrap capacitor.The effect of bootstrap capacitor is to expand power amplifier output
The dynamic range of grade.
10 ends foot OUT1 of TDA8954J chip are the amplified pwm signal output end in a channel, L1, R4, C9, C10 structure
At low-pass filter circuit.14 ends foot OUT2 are the amplified pwm signal output ends in two channels, and L2, R5, C11, C12 constitute low pass
Filter circuit.The carrier frequency in the output signal of PWM is filtered out again in addition, C13, R6, C14 constitute low-pass filter circuit.
For this circuit under the conditions of 4 Europe of loudspeaker impedance, operating voltage ± 40V, output peak power is 400W.
6, loudspeaker
Since the moment output power of circuit of the present invention of issuing an order reaches 400W.Select 12 cun of peak power 500W
Medium and low spectrum loudspeaker, 4 ohm of loudspeaker voice coil impedance.
7, LED flash
Its effect is that synchronous generation intense flash signal, which is used as, to clock when loudspeaker issues the voice signal of sportsman's starting
Commencing signal.The LED luminous response time is very short, shines suitable for short time herein, high brightness.
LED superbright flash control circuit such as Fig. 7 selects the plate type LED array lamp of 12V power supply, power 50W.By 12V
Storage battery power supply, metal-oxide-semiconductor T9 are the electronic switch for controlling LED light, and T10 is the driving buffer stage of electronic switch T9.When from micro-
When the end SWLED of processor module is high level, T10 is connected through R32, the transmitting of T10 extremely high level, the emitter of T10
It is connect with the grid of T9, and then drives metal-oxide-semiconductor T9 conducting, the flat superbright LED array lamp of 12V shines.After moment shines,
The end SWLED becomes low level, T9, T10 cut-off, and LED array lamp extinguishes.
8, issue an order key
Such as Fig. 8, the key START that issues an order is the important control button of electronic starting circuit, using rising edge triggering mode, when
It presses after issuing an order key START, microprocessor is immediately detected the terminal and rising edge signal occurs, and microprocessor will export in due course
Multiple control signal controls circuit each unit of issuing an order and works in coordination, issue an order voice signal and synchronization flash signal.
9, microprocessor module
Such as Fig. 8, using microprocessor AT89C52 as core, 40 feet are+5V power end, and 20 feet are ground terminal.18 feet and 19 feet
External crystal oscillator, crystal oscillator frequency 11.0592MHz, C51 and C52 are the shunt capacitance of crystal oscillator.R34, C53 and key RST constitute micro-
The reset circuit of processor.
12 feet of microprocessor AT89C52 are key test side of issuing an order, and 10 feet, 11 feet, 21 feet, 25 feet of microprocessor are equal
For output end, original state is low level.
R35, C54 and key START constitute key circuit of issuing an order.The key START that issues an order presses moment, generates a rising
12 feet of microprocessor AT89C52 are acted on along electric signal.Microprocessor on the basis of the rising edge of the 12 foot signals of T89C52,
Generate PLAYE, MODE, SWLED, TIME multiple control signal simultaneously:
1. PLAYE signal: 10 feet of microprocessor AT89C52 are high level, resulting rising by low level jump
Along PLAYE sound production touch signal (rising edge triggering) is used as, this is signally attached to sound circuit PLAYE terminal shown in Fig. 4, core
Piece starts to play starting pistol sound signal, and after the sound signal of 400ms finishes, it is low level that 10 feet, which are replied, and keeps 8s
Time does nothing the key START that issues an order is pressed again in this dormancy time.
2. MODE signal: 25 feet of microprocessor AT89C52 generate 23 feet that MODE signal is connected to TDA8954J chip,
After this signal becomes high level from the low level of original state, audio frequency power amplifier TDA8954J enters working condition, the sound that will issue an order
Signal amplification is imitated as the voice signal issued an order.Since the voice signal duration issued an order is 400ms, so, MODE terminal
High level signal keeps 400ms, just completes the voice signal once issued an order output.Replying later is low level, is made
TDA8954J chip is in suspend mode mute state, and is kept for the 8s time, in this dormancy time, even if issuing an order key START again
Secondary press also does nothing.
3. SWLED signal: 21 feet of microprocessor AT89C52 generate a positive pulse signal SWLED, as flash lamp control
Signal processed, the high level of the terminal can control the flash lamp of Fig. 6 to shine, this flashing signal to shine as electronic starting, with hair
Enable voice signal is synchronous to generate.SWLED positive pulse terminates after continuing 400ms, with the same the end of the step of voice signal of issuing an order.Later
The end SWLED is kept for the low level 8s time, in this dormancy time, without any the key START that issues an order is pressed again
Operation.
4. TIME signal: 11 feet of microprocessor AT89C52 generate a positive pulse, and rising edge is as electric time-keeping
Trigger signal (Function Extension is spare).
Issue an order above operate it is primary after have dormant period of 8s, wait for the crack of the starting gun after dormant period key START again by
Under, operation of issuing an order next time can be executed.
In conclusion electronic starting circuit energy stringent synchronization of the present invention generates the sound and optic signal issued an order, intensity
Traditional starting pistol can be substituted with effect.The sound and optic signal duration once issued an order is 400ms, and circuit enters and stops later
Dormancy state 8s, presses key of issuing an order during suspend mode, and system does not work.Key of issuing an order is pressed after suspend mode, system can just generate newly
Signal of issuing an order.To reduce the electric quantity consumption of battery to the maximum extent.Above description is only the preferred embodiment of the application
And the explanation to institute's application technology principle.It will be appreciated by those skilled in the art that invention scope involved in the application, and
It is not limited to technical solution made of the specific combination of above-mentioned technical characteristic, while should also cover and not depart from the inventive concept
In the case of, any combination is carried out by above-mentioned technical characteristic or its equivalent feature and other technical solutions for being formed.Such as above-mentioned spy
Levy the technical side that with (but being not limited to) disclosed herein there is the technical characteristic of similar functions to be replaced mutually and formed
Case.
Claims (9)
1. a kind of electronic starting circuit, including 12V battery, 5V voltage regulator circuit, booster circuit, sound circuit, audio frequency power amplifier electricity
Road, microprocessor module, LED flash, loudspeaker and key of issuing an order, the 12V battery are connected to voltage regulator circuit, boosting electricity
Road and LED flash, voltage regulator circuit output 5V are connected to sound circuit and microprocessor module, and booster circuit exports double 40V and connects
It is connected to audio frequency power amplifier, audio frequency power amplifier output is connected to loudspeaker, issues an order by being keyed to microprocessor module, microprocessor module
It exports 3 tunnels control signal and is connected respectively to sound circuit, audio frequency power amplifier and LED flash.
2. a kind of electronic starting circuit according to claim 1, it is characterized in that: the 12V battery positive voltage is connected to institute
State the VBat terminal of 5V voltage regulator circuit, it is voice circuit module of electric and micro- that 12V voltage, which generates 5V voltage through three terminal regulator LM7805,
Processor module power supply, C35 and C36, C37 and C38 are the input of voltage regulator circuit, output filter capacitor.
3. a kind of electronic starting circuit according to claim 1, it is characterized in that: the booster circuit is using SG3525 as core
Pwm control circuit, SG3525 is a function admirable, multiple functional, versatile single-chip integration PWM controller, 1. foot
It is the inverting input terminal of error amplifier, final output voltage terminal VDD is connected to by resistance R12, potentiometer RV1 is for adjusting
Feedback voltage finally controls output voltage VDD in 40V, meanwhile, 9. it is connected to outside foot by the parallel circuit of R14 and C26
1. foot, composition integral form divides voltage regulator circuit, and 2. foot is the non-inverting input terminal of error amplifier, is connected by resistance R13
Onto the reference voltage provided by 16 foot internal circuits, 5. foot and 6. foot be PWM oscillator timing capacitor and timing resistor connect
End is connect, timing capacitor C27 and timing resistor R16 are separately connected, 7. foot is the discharge end of timing capacitor, is connected by resistance R15
To 5. foot, the discharge loop of C27 is constituted, 8. foot is soft start end, and external C42 is to ground, and 12 feet are ground terminals, and 15 feet are chips
Working power end is connected to the positive end VBat of 12V battery, and external connection C29 and C30 are used to do power filter, and 13 feet are
The collector of pwm pulse efferent duct is connected to 15 foot of power end by R17, and C33 and C34 constitute the filter capacitor of 13 feet,
11 feet and 14 feet of SG3525 are the push-pull output ends of PWM, are connected respectively to the end OutA and OutB, and the end OutA connects through resistance R24
It is connected to the base stage of triode T5 and T6, the end OutB is connected to the base stage of triode T7 and T8 through resistance R25, and what T5 and T6 were constituted pushes away
The push-pull circuit that circuit through resistance R19 is used to that inverse switch pipe T4, T7 and T8 is driven to constitute is drawn to be used to drive inversion through resistance R20
Switch transistor T 3, T3 and T4 selection are high-power MOS FET, constitute push-pull type inverter output circuit, and TR1 is that inversion exports transformation
Device, armature winding centre cap are connected to the end 12V battery positive voltage VBat through protective tube FU1, and BR1 is the fast of inverting output terminal
Fast rectifier bridge, capacitor C31, C32, C43 composition+40V power filter, capacitor C39, C40, C44 composition -40V power filter.
4. a kind of electronic starting circuit according to claim 1, it is characterized in that: the sound circuit is using ISD1820 as core
The heart, 10. the R27=100k of foot, is external oscillation resistance, determines recording sampling frequency for 6.4kHz, outside the RECLED terminal of 13 feet
Sending and receiving optical diode D1 and current-limiting resistance R28 constitutes record indicator circuit, starts to record after pressing 1. foot REC key, records
Signal source comes from 4. foot and 5. foot external microphone MIC, and R29, R30, R31, C50 are microphone power supply circuit, provides properly for microphone
Operating voltage, 6. the external C47 of foot constitutes the AGC filter capacitor of recording circuit, automatic gain control circuit (AGC) control in piece
The gain of preamplifier extends the dynamic range of recorded audio signals, promotes recording quality, C46 is 5V power filtering capacitor, 2. foot
It is PLAYE terminal, there is edging trigger player function, when rising edge occurs in this terminal, chip starts to play full section voice
Chip is automatically into electricity-saving state after finishing, the two terminal outputs of foot from 7. foot and 9. of the sound signal of issuing an order of broadcasting.
5. a kind of electronic starting circuit according to claim 1, it is characterized in that: in the audio power amplifier circuit
18 foot VSSA of TDA8954J chip are analog power voltage cathode, connect with booster circuit output terminal VSS, provide -40V's
Supply voltage, C20 are power filtering capacitor, and 20 foot VDDA are analog power positive polarity, are connected with booster circuit output terminal VDD
It connects, the supply voltage of+40V is provided, C21 is power filtering capacitor, and 19 foot SGND are for input signal；The 2 of TDA8954J chip
Foot IN1P is channel audio input anode, and 3 foot IN1M are that a channel audio inputs cathode, and 22 foot IN2P are that two channel audios are defeated
Enter anode, 21 foot IN2M are that two channel audios input cathode, the present invention using double passage differential input mode, by IN1P and
IN2M is connected to IN+ terminal, as the positive input terminal of audio signal source, IN1M and IN2P is connected to IN- terminal, as sound
The negative input end of frequency source signal, capacitor C1, C2, C3, C4 are audio signal input coupling capacitor.
6. a kind of electronic starting circuit according to claim 1, it is characterized in that: the microprocessor module is with AT89C52
For core, 40 feet are+5V power end, and 20 feet are ground terminal, 18 feet and the external crystal oscillator of 19 feet, crystal oscillator frequency 11.0592MHz,
C51 and C52 is the shunt capacitance of crystal oscillator, and R34, C53 and key RST constitute the reset circuit of microprocessor, microprocessor
12 feet of AT89C52 are key test side of issuing an order, and 10 feet, 11 feet, 21 feet, 25 feet of microprocessor are output end, initial shape
State is low level, and R35, C54 and key START constitute key circuit of issuing an order, and the key START that issues an order is pressed moment, generates one
Rising edge electric signal acts on 12 feet of microprocessor AT89C52, and microprocessor is with the rising edge of the 12 foot signals of T89C52
Benchmark.
7. a kind of electronic starting circuit according to claim 1, it is characterized in that: the LED flash is supplied by 12V battery
Electricity, metal-oxide-semiconductor T9 are the electronic switch for controlling LED light, and T10 is the driving buffer stage of electronic switch T9.When from microprocessor mould
When the end SWLED of block is high level, T10 is connected through R32, the transmitting of T10 extremely high level, the emitter of T10 and the grid of T9
Pole connection, and then metal-oxide-semiconductor T9 conducting is driven, the flat superbright LED array lamp of 12V shines.After moment shines, the end SWLED becomes
For low level, T9, T10 cut-off, LED array lamp extinguishes.
8. a kind of electronic starting circuit according to claim 1, it is characterized in that: the key of issuing an order is triggered using rising edge
Mode, when press issue an order key START after, microprocessor is immediately detected the terminal and rising edge signal occurs, and microprocessor will
Output multiple control signal in due course controls circuit each unit of issuing an order and works in coordination, issue an order voice signal and synchronization flash letter
Number.
9. a kind of electronic starting circuit according to claim 1, it is characterized in that: microprocessor module generation PLAYE,
Several control signals of MODE, SWLED, TIME.
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| CN201811462975.0A CN109326067A (en) | 2018-12-03 | 2018-12-03 | A kind of electronic starting circuit |
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