CN103578458B - A kind of electronic horn driven with firm power and its implementation - Google Patents
A kind of electronic horn driven with firm power and its implementation Download PDFInfo
- Publication number
- CN103578458B CN103578458B CN201210279169.6A CN201210279169A CN103578458B CN 103578458 B CN103578458 B CN 103578458B CN 201210279169 A CN201210279169 A CN 201210279169A CN 103578458 B CN103578458 B CN 103578458B
- Authority
- CN
- China
- Prior art keywords
- electronic horn
- pulse width
- drive signal
- drive
- supply voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention relates to a kind of electronic horn driven with firm power and its implementation, the method includes：The current supply voltage of electronic horn is detected, current voltage value is drawn；Default constant drive performance number according to current voltage value and electronic horn calculates pulse width of the electronic horn drive signal under current supply voltage, and pulse width of the electronic horn drive signal under current supply voltage is met with the condition of default constant drive power drive electronic horn；Drive signal to electronic horn carries out pulse width modulation, by drive signal modulation to the pulse width under current supply voltage；Electronic horn sounding is driven with the drive signal after pulse width modulation.Loudspeaker supply voltage of the present invention is computed changing automatically the pulse width of loudspeaker drive signal when changing, ensure that loudspeaker accurately work under nominal power, solve loudspeaker sound pressure level is influenceed by supply voltage, eliminate loudspeaker forge iron initiation loudspeaker noise and the lost of life the drawbacks of.
Description
Technical field
The present invention relates to a kind of motorized vehicles and vessels electronic horn field, more particularly to the electronic horn that a kind of firm power drives
And its implementation.
Background technology
General motorized vehicles and vessels electric horn, either mechanical or electronic type, loudspeaker in itself driving power due to being supplied
Piezoelectric voltage influences and changes very big.For example, electric horn requirement lies prostrate operating at voltages in 9-16, according to normal voltage 13V, work electricity
The loudspeaker power that stream 4A is calculated can occur significantly to change in the range of 25W-79W.This has to loudspeaker voice effect and loudspeaker life-span
Very big influence, loudspeaker sound level significantly decays under easily producing low-voltage, and loudspeaker drive the electromagnet of diaphragm sounding to move under high voltage
Unshakable in one's determination and fixed core bumps against（It is commonly called as forging iron）Produce noise.This phenomenon both destroys tonequality, also greatly reduces the loudspeaker longevity
Life.Although someone is driven using constant-current source or is reduced using analog device and driven pulsewidth and reduce the way of electric current, however all because
Driving power can not accurately be controlled, so as to the generation of this kind of fault mode cannot be eliminated.
For example, the electric horn driven using constant-current source, it is 4A that electric current is constant, its power when electric horn is in 9V voltage power supplies
It is 36W, in 13V voltage power supplies, power is 52W, in 16v voltage power supplies, power is 64W, although this method is better than being not added with
The commonsense method of control, but do not reach the requirement that accurate control is worked with constant drive power much also.
The content of the invention
It is an object of the invention to provide a kind of electronic horn and in fact driven with firm power that can overcome drawbacks described above
Existing method.
In the first aspect of the present invention, there is provided a kind of method that electronic horn is driven with firm power, including：Detection electricity
The current supply voltage of sub- loudspeaker, draws current voltage value；According to the pre- of the current voltage value and electronic horn
If constant drive performance number calculate pulse width of the electronic horn drive signal under current supply voltage, the electronic horn
Pulse width of the drive signal under current supply voltage is met with the condition of default constant drive power drive electronic horn；
Drive signal to electronic horn carries out pulse width modulation, by drive signal modulation to the pulse under the current supply voltage
Width；And drive electronic horn sounding with the drive signal after the pulse width modulation.
In the second aspect of the present invention, there is provided a kind of electronic horn driven with firm power, including：Voltage detecting mould
Block, the current supply voltage for detecting electronic horn, draws current voltage value；Pulse width computing module, for root
Electronic horn drive signal is calculated according to the default constant drive performance number of the current voltage value and electronic horn working as
Pulse width under preceding supply voltage, pulse width of the electronic horn drive signal under current supply voltage is met with pre-
If constant drive power drive electronic horn condition；Pulse width modulation module, for the drive signal to electronic horn
Pulse width modulation is carried out, by drive signal modulation to the pulse width under the current supply voltage, to use the pulse
Drive signal after width modulated drives electronic horn sounding.
The present invention by the difference according to loudspeaker supply voltage, according to the Mathematical Modeling of Constant-power drive after being converted through A/D,
Automatic accurate change drives the pulse width of loudspeaker, makes the product all-the-time stable of the electric current of supply loudspeaker and voltage in setting
Performance number.No matter so how loudspeaker supply voltage changes and be always ensured that loudspeaker accurately work under nominal power, thoroughly solve
Loudspeaker sound pressure level is influenceed by supply voltage, is also completely eliminated loudspeaker and is forged iron the loudspeaker noise of initiation and the disadvantage of the lost of life
End.
Brief description of the drawings
Fig. 1 is the circuit diagram of the electronic horn that firm power according to embodiments of the present invention drives；
Fig. 2 is the method flow diagram that electronic horn is driven with firm power according to embodiments of the present invention；And
Fig. 3 is the structural representation of the electronic horn driven with firm power according to embodiments of the present invention.
Specific embodiment
Below by drawings and Examples, technical scheme is described in further detail.
Fig. 1 is the circuit diagram of the electronic horn that firm power according to embodiments of the present invention drives.
As shown in figure 1, the circuit diagram of the present embodiment includes that power suppling part point, power amplifying part, loudspeaker pipe signal
Produce part and supply voltage detection part.
Power suppling part point includes that one is made up of anti-reverse polarity diodes D1, current-limiting resistance R4 and voltage-regulator diode DW1
Serial regulating circuit.The positive pole of anti-reverse polarity diodes D1 is connected with power positive end VCC, and negative pole is connected with current-limiting resistance R4.
Electric capacity C1 is in parallel with voltage-regulator diode DW1, is then connected between the negative terminal of power supply and current-limiting resistance, thus provides stabilization electricity
Pressure.It will be understood by those within the art that, power suppling part point may also take on other types of mu balanced circuit.
Power amplifying part includes a FET T1.The grid of FET T1 is connected to the signal output of single-chip microcomputer
End, the electronic horn drive signal for receiving single-chip microcomputer output.The source electrode of FET T1 is connected to power supply negative terminal.Field-effect
A diode D2 is connected between the drain electrode of pipe T1 and source electrode.The positive pole of diode D2 is connected with the source electrode of FET T1.
Electronic horn SP is connected between the drain electrode of FET T1 and the negative pole of diode D1.One of ordinary skill in the art should
Understand, power amplifying part can be by including transistor, FET, igbt（IGBT）Electronic component
Realize.Acted on electronic horn after amplifying through FET T1 from the signal of single-chip microcomputer output, drive electronic horn sounding.
Supply voltage detection part includes resistance R2, R3, and resistance R2 and R3 are connected in series in the negative pole and electricity of diode D1
Between the negative terminal of source, for the supply voltage partial pressure to loudspeaker.
Loudspeaker drive signal generating unit point is by chip microcontroller.One of pin of single-chip microcomputer is connected to resistance R3 and R4
Between.Memory in sending into single-chip microcomputer after being changed through A/D in single-chip microcomputer through the electric signal after R3, R4 partial pressure, according to through A/D
The resistance value of numerical value and divider resistance R3, R4 after conversion, can calculate the current voltage value of electronic horn.Single-chip microcomputer
The numerical value of the current supply voltage according to electronic horn, the Mathematical Modeling driven according to firm power is calculated, and finds out loudspeaker
The output pulse width of the drive signal of firm power driving is met under present operating voltage.Firm power is to pre-set simultaneously
It is stored in the memory of single-chip microcomputer, it can be the load voltage value of electronic horn.Also produced including signal in single-chip microcomputer
Unit, the drive signal for producing electronic horn.Then, the drive signal of the electronic horn to being produced by single-chip microcomputer carries out arteries and veins
Width modulated is rushed, by its pulse width modulation into the output pulse width for drawing calculated above, electronics is driven after power amplification
Sound horn.In this case, the input current of electronic horn and the product of voltage are that power keeps constant, therefore are reached
The purpose of electronic horn is driven with firm power.
Fig. 2 is the method flow diagram that electronic horn is driven with firm power according to embodiments of the present invention.
In step 201, the current supply voltage of electronic horn is detected.Can be realized with various circuit structures to electronics loudspeaker
The detection of current supply voltage.After obtaining electric signal from the circuit of electronic horn, the electric signal is simulated-numeral
Conversion, is converted into data signal.Can be counted by known conditions related to the electric signal in the data signal and circuit
Calculate the numerical value of the current supply voltage of electronic horn.
In step 202, the pulse width of electronic horn drive signal is calculated.Current supply voltage according to electronic horn
The constant drive power of data signal and default electronic horn, drives the Mathematical Modeling of electronic horn to enter according to firm power
Row is calculated, and calculates the pulse that electronic horn drive signal meets the drive signal of firm power driving under present operating voltage
Width.
In step 203, the drive signal to electronic horn carries out pulsewidth modulation.By pulse width modulation, by electronics loudspeaker
The pulse width of drive signal is adjusted to consistent with the pulse width calculated in step 202.
In step 204, electronic horn is driven with the drive signal of pulsewidth modulation.Drive signal after pulsewidth modulation by driving
Electronic horn sounding, because the current pulse length of drive signal is calculated according to the condition in step 202, therefore can
To ensure that the input current of electronic horn and the product i.e. power of voltage keep constant, electronics is driven with firm power so as to reach
The purpose of loudspeaker.
Fig. 3 is the structural representation of the electronic horn driven with firm power according to embodiments of the present invention.
First, analog-to-digital conversion module will in electronic horn circuit obtain electric signal through analog-to-digital conversion into data signal,
And it is sent to voltage detection module.Voltage detection module is by drawing the current supply voltage of electronic horn after calculating.Then,
Pulse width computing module is according to the numerical value of the current supply voltage of electronic horn and the constant drive work(of default electronic horn
Rate, drives the Mathematical Modeling of electronic horn to be calculated according to firm power, calculates electronic horn drive signal current
Meet under supply voltage with the pulse width of firm power drive condition.Finally, Pulse width modulation module is according to calculating
Pulse width pulse width modulation is carried out to the drive signal that signal generation unit is generated, its pulse width is adjusted to above-mentioned
The pulse width for calculating.Finally, output drives electronic horn sounding through the drive signal after pulsewidth modulation.Thus it is guaranteed that
The input current of electronic horn and the product of voltage are that power keeps constant, and electronic horn is driven with firm power so as to reach
Purpose.The numerical value of the numerical value of the current supply voltage of electronic horn and the constant drive power of default electronic horn can be stored
In memory, memory is connected with pulse width computing module to provide it numerical value needed for calculating, and memory can also
Positioned at the inside of pulse width computing module.In another embodiment of the present invention, the analog-to-digital conversion module can also be wrapped
It is contained in the voltage detection module.
Professional should further appreciate that, each example described with reference to the embodiments described herein
Unit and algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, hard in order to clearly demonstrate
The interchangeability of part and software, generally describes the composition and step of each example according to function in the above description.
These functions are performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.
Professional and technical personnel can realize described function to each specific application using distinct methods, but this realization
It is not considered that beyond the scope of this invention.
The method that is described with reference to the embodiments described herein can use hardware, computing device the step of algorithm
Software module, or the two combination is implemented.Software module can be placed in random access memory（RAM）, internal memory, read-only storage
（ROM）, electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage medium well known to interior.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (10)
1. it is a kind of with firm power drive electronic horn method, including：
The current supply voltage of electronic horn is detected, current voltage value is drawn；
Default constant drive performance number according to the current voltage value and electronic horn calculates electronic horn and drives letter
Pulse width number under current supply voltage, pulse width of the electronic horn drive signal under current supply voltage expires
It is enough to the condition of default constant drive power drive electronic horn；
Drive signal to electronic horn carries out pulse width modulation, by under drive signal modulation to the current supply voltage
Pulse width；And
Electronic horn sounding is driven with the drive signal after the pulse width modulation.
2. method according to claim 1, wherein, include the step of the current supply voltage for detecting electronic horn：
Obtain the electric signal after the partial pressure of the current supply voltage of electronic horn；
Analog-to-digital conversion is carried out to the electric signal after the partial pressure, data signal is converted thereof into；And
It is worth the current voltage value of electronic horn according to the data signal and divider resistance.
3. method according to claim 1, wherein, drive electronic horn with the drive signal after the pulse width modulation
The step of sounding, includes：
Drive signal after pulse-width modulated drives electronic horn sounding after carrying out power amplification.
4. method according to claim 1, wherein, the default constant drive performance number is the specified work(of electronic horn
Rate value.
5. it is a kind of with firm power drive electronic horn, including：
Voltage detection module, the current supply voltage for detecting electronic horn, draws current voltage value；
Pulse width computing module, for the default constant drive power according to the current voltage value and electronic horn
Value calculates pulse width of the electronic horn drive signal under current supply voltage, and the electronic horn drive signal is supplied currently
Pulse width under piezoelectric voltage is met with the condition of default constant drive power drive electronic horn；And
Pulse width modulation module, pulse width modulation is carried out for the drive signal to electronic horn, and drive signal is modulated
Pulse width under the current supply voltage, to drive electronic horn with the drive signal after the pulse width modulation
Sounding.
6. electronic horn according to claim 5, wherein, the voltage detection module includes：
Analog-to-digital conversion module, for the electric signal obtained from electronic horn circuit to be converted into data signal for electronics
The calculating of the current supply voltage of loudspeaker.
7. electronic horn according to claim 5, also includes：
Signal generation unit, the drive signal for producing electronic horn.
8. electronic horn according to claim 5, also includes：
Memory, the default constant drive performance number for storing the current voltage value and electronic horn.
9. electronic horn according to claim 5, also includes：
Power amplifier module, electronic horn hair is driven after carrying out power amplification for the drive signal after pulse-width modulated
Sound.
10. electronic horn according to claim 9, wherein, the power puts unit includes transistor, FET, absolutely
One of edge grid bipolar transistor (IGBT).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210279169.6A CN103578458B (en) | 2012-08-07 | 2012-08-07 | A kind of electronic horn driven with firm power and its implementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210279169.6A CN103578458B (en) | 2012-08-07 | 2012-08-07 | A kind of electronic horn driven with firm power and its implementation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103578458A CN103578458A (en) | 2014-02-12 |
| CN103578458B true CN103578458B (en) | 2017-06-27 |
Family
ID=50050113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210279169.6A Active CN103578458B (en) | 2012-08-07 | 2012-08-07 | A kind of electronic horn driven with firm power and its implementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103578458B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500574B (en) * | 2012-08-16 | 2017-06-27 | 万喻 | A kind of intelligent electronic horn and its implementation |
| CN105590622A (en) * | 2014-11-18 | 2016-05-18 | 鸿富锦精密工业(武汉)有限公司 | Thumper circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2254583Y (en) * | 1995-12-14 | 1997-05-21 | 蒋华东 | Digital multitone contactless electronic horn for vihicle |
| CN2870076Y (en) * | 2005-12-30 | 2007-02-14 | 哈尔滨工业大学固泰电子有限责任公司 | Self-adoptive intelligent electronic horn |
| CN102285356A (en) * | 2010-05-20 | 2011-12-21 | 松下电工株式会社 | Vehicle burglar alarm circuit |
| CN102411923A (en) * | 2011-11-25 | 2012-04-11 | 合肥工业大学 | Single-port driving method and circuit for passive buzzer and light-emitting diode (LED) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934758B (en) * | 2010-09-30 | 2012-10-03 | 曹志才 | Klaxon primary sound pressure level stabilization control method |
-
2012
- 2012-08-07 CN CN201210279169.6A patent/CN103578458B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2254583Y (en) * | 1995-12-14 | 1997-05-21 | 蒋华东 | Digital multitone contactless electronic horn for vihicle |
| CN2870076Y (en) * | 2005-12-30 | 2007-02-14 | 哈尔滨工业大学固泰电子有限责任公司 | Self-adoptive intelligent electronic horn |
| CN102285356A (en) * | 2010-05-20 | 2011-12-21 | 松下电工株式会社 | Vehicle burglar alarm circuit |
| CN102411923A (en) * | 2011-11-25 | 2012-04-11 | 合肥工业大学 | Single-port driving method and circuit for passive buzzer and light-emitting diode (LED) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103578458A (en) | 2014-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103500574B (en) | A kind of intelligent electronic horn and its implementation | |
| CN204808873U (en) | Intelligence electron loudspeaker | |
| CN209418144U (en) | A kind of buzzer circuit | |
| CN102545804A (en) | Class-D amplifier circuit | |
| CN103578458B (en) | A kind of electronic horn driven with firm power and its implementation | |
| CN104767431B (en) | A kind of control method, the device and system of the modulation of DC brushless motor pulse width | |
| TWI407687B (en) | Method for switching an audio amplifier between ternary modulation and quaternary modulation | |
| CN101387894A (en) | Bias current generating circuit and operational amplifier | |
| US6975172B2 (en) | Smart voltage rail reduction audio amplifier | |
| CN103078475A (en) | Dual-edge constant-turnoff-time modulating voltage type control method and device for switching converter | |
| CN201937235U (en) | Overcurrent protection circuit | |
| CN206313977U (en) | Plosive eliminating device and power amplifier circuit | |
| US7629842B2 (en) | Class D audio amplifier | |
| CN103259496A (en) | Closed-loop negative-feedback modulation and demodulation switch power amplifier | |
| JP5266830B2 (en) | Self-excited class D amplifier | |
| CN107070229A (en) | A kind of ADCP transmitting source levels conditioned circuit and method | |
| US20160265544A1 (en) | Adjustable fan speed | |
| US9250639B2 (en) | Advanced energy management | |
| CN100356689C (en) | Pulse amplitude modulating method and circuit for improving D class audio amplifier property | |
| CN219533695U (en) | Control circuit for electrotherapy apparatus and electrotherapy apparatus | |
| CN218213184U (en) | Commercial power zero crossing point detection circuit | |
| CN104348452A (en) | Pulse width modulation voltage frequency selection system and method thereof | |
| CN201336629Y (en) | Dynamic braking unit of frequency converter | |
| CN203482132U (en) | Proportional-integral controller | |
| TWI683525B (en) | Motor driving circuit and motor driving method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |