CN200969214Y - Electronic horn for motor vehicle - Google Patents
Electronic horn for motor vehicle Download PDFInfo
- Publication number
- CN200969214Y CN200969214Y CN 200620126085 CN200620126085U CN200969214Y CN 200969214 Y CN200969214 Y CN 200969214Y CN 200620126085 CN200620126085 CN 200620126085 CN 200620126085 U CN200620126085 U CN 200620126085U CN 200969214 Y CN200969214 Y CN 200969214Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- triode
- diode
- audio frequency
- peak 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to a vehicle electronic trumpet, which is composed of a loudhailer, a flexible diaphragm with a gap bit, an electromagnetic coil, an electronic controller, an iron core, a wiring plug and a mounting bracket. The utility model is characterized in that: the electronic controller comprising an audio oscillation, a buffer plastic circuit, an amplifier output circuit and a peak voltage resistance protection circuit; wherein the square wave signal from the oscillator audio is shaped by the buffer plastic circuit first and then amplified by the amplifier output circuit, and finally outputted. The square wave signal inspires the electromagnetic coil communicate or cut off according to the vibration frequency, thus enabling the flexible diaphragm with a gap bit generate mechanical vibration and vibrate air in the loudhailer and air in the environment to sound; the peak voltage resistance protection circuit prevents the peak voltage generated from the magnetic coil from being transmitted to access of each circuit, and provides an access to the peak voltage resisting. The utility model is simple in structure, and low in manufacturing cost. Moreover, vibration frequency of the electronic controller changes in accordance with environmental temperature, in the limit temperature minus 40 DEG C and plus 75 DEG C, the sound level is15 to 30 dB (A) lower than the standard requirements.
Description
Technical field
The utility model relates to a kind of electronic horn, is specifically related to a kind of automobile-use electronic horn.
Background technology
The structural principle of existing automobile-use electronic horn is by input single card microcomputer fundamental frequency matched data, after producing required oscillation frequency, matched data is solidificated in the single card microcomputer, amplify through high-power FET again, energized solenoids is by above-mentioned oscillation frequency break-make, make the flexible sheet that has armature produce mechanical vibration, ripple hits the surrounding air vibration, produces sound.
The advantage of this electronic horn is that the adjustment of oscillation frequency is the input data, need not add build-out resistor, has so just reduced the trouble spot, and manufacturability is better.But its fatal shortcoming is that oscillation frequency is not with variation of ambient temperature; And atmospheric density, electromagnetic wire resistance, the natural frequencys of flexible sheet etc. are all with variation of ambient temperature, and the test statistics data show that when oscillation frequency changed 5Hz, the system works point began drift, cause height, and cryogenic property is bad, and loudspeaker can not normally pipe; In addition, the manufacturing cost of this electronic horn is also than higher.
The utility model content
What the present invention will solve is exactly the problem that above-mentioned prior art exists, and provides a kind of oscillation frequency of electronic controller to change with variation of ambient temperature, the height of product, and cryogenic property satisfies the automobile-use electronic horn that product standard requires.
The utility model is made up of cone, armature, solenoid, electronic controller, iron core, connection plug and mounting bracket, it is characterized in that electronic controller comprises audio frequency oscillator, buffering shaping circuit, power amplifier output circuit and anti-honeybee voltage protection circuit, the square-wave signal that audio frequency oscillator produces is by the shaping of buffering shaping circuit, output after the power amplifier output circuit amplifies again, energized solenoids is by above-mentioned oscillation frequency break-make, make the flexible sheet that has armature produce mechanical vibration, involve interior air of cone and surrounding air vibration and generation sound; Anti-honeybee voltage protection circuit be used for inverse peak voltage that the block electromagnetic coil produces lead to aforementioned each circuit path, and press for anti-honeybee path be provided.
Because automobile storage battery voltage changes in 11V～15V scope, and this variation is very big to the influence of oscillation frequency, for voltage being stabilized on the required numerical value, the aforementioned electronic controller also comprises a voltage stable circuit, and this circuit is connected between motor vehicle Vehicular accumulator cell and the audio frequency oscillator.
The utility model is simple in structure, manufacturing cost is than the low 4-5 unit/platform of existing single card microcomputer formula electronic horn, do endurancing by GB15742-2001 " performance requirement of automobile-use loudspeaker and test method " and QC/T30-2004 " automobile-use electric horn technical conditions ", hot test and low-temperature test, the utility model meets the requirement of above-mentioned standards and norms, and the oscillation frequency of electronic controller can change with the variation of environment temperature, when the ultimate temperature-40 of standard code ℃ and+75 ℃, sound level is than the low 15～30dB of standard code (A).
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the theory diagram of the utility model electronic controller.
Fig. 3 is the electrical schematic diagram of the utility model embodiment electronic controller.
The schematic diagram of the high power third-level pipe in Fig. 4 inverse peak voltage holding circuit protection power amplifier output circuit.
Embodiment
Referring to Fig. 1, the utility model is made up of cone 1, flexible sheet 2, solenoid 3, electronic controller 4, iron core 5, connection plug 6 and mounting bracket 7 by armature, except that electronic controller 4, all the other electromagnetic mechanism parts of the present utility model are identical with prior art, do not give unnecessary details so do not do.
Referring to Fig. 2 to Fig. 4 electronic controller of the present utility model by electronic controller by voltage stable circuit, audio frequency oscillator, buffering shaping circuit, power amplifier output circuit and anti-honeybee voltage protection circuit are formed.
Because automobile storage battery voltage is to change in 11V～15V scope, this variation is greatly to the influence of oscillation frequency, therefore need be on required numerical value with the stabilized input voltage of electronic controller, and voltage stable circuit of the present utility model promptly plays this effect.This circuit is by integrated package of pressure-stabilizing IC2 and capacitor C 4, and C5 forms, C4 wherein, and C5 is the filter capacitor of integrated package of pressure-stabilizing IC1, the output voltage rate of temperature change of this circuit is 1mv/ ℃ (during a full load), can satisfy the demand of audio frequency oscillator to burning voltage fully.
Audio frequency oscillator be one by ic chip 1, resistance R 1, R2, the no steady oscillatory circuit of directly anti-burst formula or the anti-indirectly formula of bursting that capacitor C 1, C2, diode 4148 formed.R1 and 4148 is used to control the dutycycle of the square wave of ic chip 1 output, the frequency of the numerical parameter control output square wave of C1 and R2, and C2 is the shunt capacitance of integrated package.In order to guarantee that in environment temperature-40～75 ℃ scope the oscillation frequency of electronic controller can be with other assemblies of loudspeaker, the variation of atmospheric density and changing need be carried out temperature compensation to audio frequency oscillator.In the present embodiment, the temperature compensation of audio frequency oscillator is carried out from following two aspects: the one, IC1 adopt the stability coefficient less amass into circuit block, concrete model is 5G1555, its temperature coefficient only is 0.03%/℃; The 2nd, R1, R2 all is made up of the thermistor of a RJ metalfilmresistor and a negative temperature coefficient, the C1 capacity becomes big when temperature variation like this, R1 then, the resistance of R2 diminishes, thereby the value that makes R2, C1 remains on the constant, guarantees that the stable of audio frequency oscillator frequency reaches change in duty cycle in allowed limits.
The buffering shaping circuit is by resistance R 3, R4, R5, and capacitor C 3, C6, diode 4148, triode 3DG and institute form, and the square wave that is produced by audio frequency oscillator passes through diode 4148 and R3 on the base stage of triode 3DG, and triode 3DG is worked; Here 4148 of diodes allow the forward square wave to pass through, and C3 filters some higher hamonic waves in the vibration; Triode 3DG is connected into the form of emitter-base bandgap grading output, thereby forms an emitter follower, utilizes the characteristic of emitter follower to isolate audio frequency oscillator and power amplifier output circuit.If oscillator output directly is connected to power amplification output, then certainly will bring harmful effect to oscillator, because the output impedance of emitter-follower is very high, so it has isolated the influence of (having cushioned in other words) low impedance power output common emitter circuit to oscillator, thereby forms a buffer stage.
Having used one 4148 diode and R3 among Fig. 3, is because buffering emitter follower characteristic is decided (oscillator signal is passed to by these two elements and cushioned the utmost point).
Suitably select C3, R5, the parameter value of R4 and C6, it is very little to make the angle, garden on the top, square wave front of IC1 output become ground, plays and improves the waveform effect, removes more most of higher hamonic waves of being come by the output of IC1 oscillator simultaneously, to reduce the burden of the last utmost point.Equally, though emitter follower does not have the voltage amplification effect, but it has electric current and power amplification effect, because power amplification circuit is a current device, emitter follower had both been isolated audio frequency oscillator like this, make its working stability, satisfied last utmost point power amplifier output circuit simultaneously again promoting the demand of electric current and power.
The power amplifier output circuit is made up of 2SD1071 compound large power triode and C7, and the ground level of aforementioned large power triode joins with the emitter of the buffer stage triode of buffering shaping circuit.
Because large power triode is a direct current amplifier, can cause zero point drift during variation of ambient temperature, therefore need carry out temperature compensation.The utility model adopts between the negative pole of base stage of large power triode oppositely diode 4148 over the ground of one of reversal connection, to realize the temperature compensation to whole power amplification circuit.Like this; when environment temperature raises; the inverse current of diode increases; so divided to walk a part to flow to the electric current of power output tube base stage; Ib was reduced than in the past; here be exactly to utilize Ib to reduce caused Ic to descend to offsetting and rise, and the protection power output tube does not damage because of Ic is excessive by the temperature Ic cause that raises.
300～350V back-emf that anti-honeybee voltage protection circuit produces when being used to handle solenoid with 400～500Hz/s break-make, this circuit is formed (referring to Fig. 4) by diode among the 2SD1071 in diode 1N4007 and the power amplifier output circuit and C7; Wherein, diode 1N4007 is used to cut off the path of inverse peak voltage, makes it to arrive the buffering utmost point of audio frequency oscillator and buffering shaping circuit, thereby plays a protective role, simultaneously again can normal power supply; Diode among the 2SD1071 and C7 then make negative peak be pressed with a path, and the resistance when inverse peak voltage passes through these two components and parts is extremely low, thereby has protected high-power efferent duct.
Voltage stable circuit is by integrated package of pressure-stabilizing IC2 and capacitor C 4, C5 forms, and C4, C5 are the filter capacitors of integrated package of pressure-stabilizing IC1, this circuit is used for stabilized input voltage with audio frequency oscillator at required numerical value, and this circuit is connected between motor vehicle Vehicular accumulator cell and the audio frequency oscillator.
C8 in the electronic controller is the shunt capacitance of an entire circuit, the 5408th, prevent power supply "+", and "-" connects anti-protection diode, the maximum current when requiring this diode can bear the The whole control circuit working, its withstand voltage also is greater than inverse peak voltage.
Claims (8)
1, a kind of automobile-use electronic horn, by cone, the flexible sheet that armature is arranged, solenoid, electronic controller, iron core, connection plug and mounting bracket are formed, it is characterized in that electronic controller comprises audio frequency oscillator, the buffering shaping circuit, power amplifier output circuit and anti-honeybee voltage protection circuit, the square-wave signal that audio frequency oscillator produces is by the shaping of buffering shaping circuit, output after the power amplifier output circuit amplifies again, energized solenoids is by above-mentioned oscillation frequency break-make, make the flexible sheet that has armature produce mechanical vibration, involve interior air of cone and surrounding air vibration and generation sound; Anti-honeybee voltage protection circuit be used for inverse peak voltage that the block electromagnetic coil produces lead to aforementioned each circuit path, and press for anti-honeybee path be provided.
2, automobile-use electronic horn according to claim 1 is characterized in that electronic controller also comprises a voltage stable circuit, and this circuit is connected between motor vehicle Vehicular accumulator cell and the audio frequency oscillator.
3, automobile-use electronic horn according to claim 1 and 2, it is characterized in that audio frequency oscillator is by ic chip 1, resistance R 1, R2, capacitor C 1, C2, diode 4148 are formed, R1 and 4148 is used to control the dutycycle of the square wave of ic chip 1 output, the frequency of the numerical parameter control output square wave of C1 and R2, C2 is the shunt capacitance of integrated package; R1, R2 all are made up of the thermistor of a RJ metalfilmresistor and a negative temperature coefficient, are used for R2, C1 are carried out temperature compensation, and the value of R2, C1 is remained on the constant.
4, automobile-use electronic horn according to claim 1 and 2, it is characterized in that cushioning shaping circuit is by resistance R 3, R4, R5, capacitor C 3, C6, diode 4148, triode 3DG and form, the square wave that is produced by audio frequency oscillator on the base stage of triode 3DG, makes triode 3DG work by diode 4148 and R3; C3 is used for filtering some higher hamonic waves of vibration square wave; Triode 3DG is connected into the form of emitter-base bandgap grading output, playing a buffer action between audio frequency oscillator and power amplifier output circuit, thereby forms a buffer stage.
5, according to claim 1 or 2 described automobile-use electronic horns, it is characterized in that the power amplifier output circuit is made up of 2SD1071 compound large power triode and C7, the ground level of aforementioned large power triode joins with the emitter of the buffer stage triode of buffering shaping circuit.
6,, it is characterized in that between the negative pole of base stage of large power triode oppositely diode 4148 over the ground of one of reversal connection, to realize temperature compensation to whole power amplification circuit according to the described automobile-use electronic horn of claim 5.
7,, it is characterized in that the inverse peak voltage holding circuit is made up of diode among the 2SD1071 in diode 1N4007 and the power amplifier output circuit and C7 according to claim 1 or 2 described automobile-use electronic horns; 1N4007 has been used to stop that inverse peak voltage leads to the path of all the other each circuit, thereby plays a protective role, simultaneously again can normal power supply; Diode among the 2SD1071 and C7 then make negative peak be pressed with a path.
8, according to claim 1 or 2 described automobile-use electronic horns, it is characterized in that voltage stable circuit is by integrated package of pressure-stabilizing IC2 and capacitor C 4, C5 forms, and C4, C5 are the filter capacitors of integrated package of pressure-stabilizing IC1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126085 CN200969214Y (en) | 2006-10-16 | 2006-10-16 | Electronic horn for motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126085 CN200969214Y (en) | 2006-10-16 | 2006-10-16 | Electronic horn for motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200969214Y true CN200969214Y (en) | 2007-10-31 |
Family
ID=38968788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620126085 Expired - Fee Related CN200969214Y (en) | 2006-10-16 | 2006-10-16 | Electronic horn for motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200969214Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890928A (en) * | 2011-07-19 | 2013-01-23 | 中国科学院声学研究所 | Electromagnetic pulse sound source |
| CN104575479A (en) * | 2015-02-04 | 2015-04-29 | 常州东村电子有限公司 | Initiative square wave driving circuit of electromagnetic buzzer |
| CN104796814A (en) * | 2014-01-21 | 2015-07-22 | 浜名湖电装株式会社 | Warning sound generation device |
-
2006
- 2006-10-16 CN CN 200620126085 patent/CN200969214Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890928A (en) * | 2011-07-19 | 2013-01-23 | 中国科学院声学研究所 | Electromagnetic pulse sound source |
| CN102890928B (en) * | 2011-07-19 | 2014-04-02 | 中国科学院声学研究所 | Electromagnetic pulse sound source |
| CN104796814A (en) * | 2014-01-21 | 2015-07-22 | 浜名湖电装株式会社 | Warning sound generation device |
| CN104575479A (en) * | 2015-02-04 | 2015-04-29 | 常州东村电子有限公司 | Initiative square wave driving circuit of electromagnetic buzzer |
| CN104575479B (en) * | 2015-02-04 | 2018-06-05 | 常州东村电子有限公司 | A kind of electromagnetic buzzer active square wave driving circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN200969214Y (en) | Electronic horn for motor vehicle | |
| CN204808873U (en) | Intelligence electron loudspeaker | |
| CN1078726C (en) | Controlling method and apparatus of constant-frequency sound-producing of electrical horn | |
| CN101685961B (en) | Power supply circuit of audio frequency power amplifier | |
| CN105375884A (en) | Loudspeaker box power amplification circuit | |
| CN207354224U (en) | Power amplification circuit for speaker of voice box | |
| CN202261772U (en) | Mute failure protection circuit | |
| CN104105029A (en) | Circuit capable of adjusting pulse width of electronic horn driving signals and circuit | |
| CN203984359U (en) | A kind of onboard audio power amplification circuit | |
| CN111641393B (en) | Complex ground wire relation conversion circuit | |
| CN2497391Y (en) | Debugging-free contactless klaxon for automobile | |
| CN206727962U (en) | A kind of audio power amplifying circuit | |
| CN2148449Y (en) | Electric horn for vehicle | |
| CN202663531U (en) | Power amplifier device with alt and bass adjustment | |
| CN2524437Y (en) | Telephone with automatic volume adjustment by thermal resistor | |
| CN103247288B (en) | A kind of Automatic automobile electric horn control system | |
| CN203368726U (en) | Circuit capable of adjusting pulse width of electronic horn driving signals | |
| CN217060855U (en) | Low-noise and low-output internal resistance voltage stabilizing circuit | |
| CN1408582A (en) | Regulation-free contactless electric horn of automobile | |
| CN2268976Y (en) | Long service life electric automobile horn | |
| CN2266181Y (en) | Auto-controlled contactless electronic horn for motor-vehicle | |
| CN210469722U (en) | Active monitoring sound box | |
| CN2204062Y (en) | Electronic horn for vehicle | |
| CN213938301U (en) | Microphone noise reduction circuit | |
| CN209897253U (en) | DSP control module based on battery voltage regulation audio amplification factor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071031 Termination date: 20101016 |