CN202677821U - Motor vehicle electronic loudspeaker - Google Patents
Motor vehicle electronic loudspeaker Download PDFInfo
- Publication number
- CN202677821U CN202677821U CN 201220283851 CN201220283851U CN202677821U CN 202677821 U CN202677821 U CN 202677821U CN 201220283851 CN201220283851 CN 201220283851 CN 201220283851 U CN201220283851 U CN 201220283851U CN 202677821 U CN202677821 U CN 202677821U
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- loudspeaker
- motor vehicle
- vehicle electronic
- voltage
- generation unit
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Abstract
The utility model relates to a motor vehicle electronic loudspeaker. The motor vehicle electronic loudspeaker comprises the following components of: a detecting unit used for detecting whether overvoltage exceeds rated working voltage; and a control unit used for controlling loudspeaker driving signals when the overvoltage exceeds the rated working voltage. When the motor vehicle electronic loudspeaker of the utility model is interfered by high voltage, a loudspeaker power driving tube can be protected from being penetrated through the control of the loudspeaker driving signals, thereby effectively protecting the motor vehicle electronic horn loudspeaker.
Description
Technical field
The utility model relates to motor vehicle electronic loudspeaker field.
Background technology
At present, the electronic horn of getting on the car in market is because the life-span is long, and the low many merits that waits of electromagnetic radiation is favored by automobile industry deeply.But because the electromagnetic interference (EMI) that produces during the electrical work such as firing system and various motor relays in the automobile power source, life-span and the reliability of automobile electronic loudspeaker there is larger impact.And automobile electronic loudspeaker can't be installed the work safety of the unit protection loudspeaker such as comparatively complicated stabilized voltage supply or DC--DC converter owing to limited by cost and own vol.
The loudspeaker power output tube is generally used triode, field effect transistor, IGBT pipe etc.The electronic horn that for example 12V works on automobile; sometimes to bear the superpotential of hundreds of volts; but because overvoltage pulse narrower in width; general simple absorption holding circuit just can be competent at; but the large width-pulse superpotential (up to hundreds of milliseconds) that runs into similar 5b in the picture ISO7637 EMC standard will make the power drive pipe immediate current in the electronic horn reach nearly hundred peaces, and the loudspeaker drive coil produces thus extremely strong back-emf and very easily the power drive pipe punctured to burn and cause loudspeaker to lose efficacy damaging.
Therefore, need now a kind ofly when electronic horn on the automobile is subject to large potential pulse and disturbs, can have the motor vehicle electronic loudspeaker of defencive function.
The utility model content
For achieving the above object, the utility model provides a kind of motor vehicle electronic loudspeaker.
A kind of motor vehicle electronic loudspeaker that the utility model provides.These motor vehicle electronic loudspeaker comprise: detecting unit, for detection of superpotential overflow fixed working voltage whether; Control module is used for when superpotential surpasses rated operational voltage, loudspeaker is driven signal control.
Further, described motor vehicle electronic loudspeaker also comprise the audible warning generation unit; Described control module is electronic switch, is used for determining whether to interrupt the transmission that loudspeaker drive signal based on the testing result of described detecting unit.
Further, described motor vehicle electronic loudspeaker also comprise the audible warning generation unit; Described control module drives the pulsewidth of signal or/and amplitude for the loudspeaker of controlling described loudspeaker drive signal generation unit generation based on the testing result of described detecting unit.
Further, described motor vehicle electronic loudspeaker also comprise the audible warning generation unit; Described control module is used for based on the testing result of described detecting unit described audible warning generation unit being resetted or/and Opportunity awaiting control for linear.
Further, be used in the described detecting unit realizing that the element of measuring ability is voltage comparator exclusive disjunction amplifier or voltage stabilizing diode or TVS pipe.
When the utility model is subject to large voltage disturbance at the motor vehicle electronic loudspeaker, drive signal by the control loudspeaker, avoid loudspeaker power drive pipe to puncture, effectively protected the motor vehicle electronic loudspeaker.
Description of drawings
Fig. 1 is the circuit diagram that the utility model embodiment protects the motor vehicle electronic loudspeaker;
Fig. 2 is the structural representation of the utility model embodiment motor vehicle electronic loudspeaker;
Fig. 3 is the structural representation of the utility model embodiment motor vehicle electronic loudspeaker;
Fig. 4 is the structural representation of the utility model embodiment motor vehicle electronic loudspeaker.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
In the specific embodiment, Fig. 1 is the circuit diagram of present embodiment protection motor vehicle electronic loudspeaker.As shown in Figure 1.The circuit of this embodiment comprises a testing circuit and a control circuit.
Wherein, testing circuit comprises a voltage stabilizing diode Z1 and a resistance R 1.Operating voltage is the electronic horn of 12V, selects the voltage stabilizing diode of 16-18V better, and operating voltage is 24 electronic horn, selects the voltage stabilizing diode of 32-36V better.Voltage stabilizing diode Z1 can be with replacements such as TVS pipes.This testing circuit is for detection of superpotential over proof operating voltage whether.
Control circuit is comprised of 2, one capacitor C 2 of a transistor T and a resistance R 2.Wherein, transistor T 2 adopts low-power transistor.Need to prove that transistor T 2 can adopt any low-power transistor or the devices such as field effect transistor or SCR.This control circuit is used for control signal and whether is transferred to loudspeaker power drive pipe T1.
The end of voltage stabilizing diode Z1 links to each other with any end at the anti-power supply reversal connection diode D1 two ends of loudspeaker voltage input end, the voltage stabilizing diode Z1 other end is connected with an end of resistance R 1, the other end of resistance R 1 is connected with resistance R 2 one ends, the other end ground connection of resistance R 2.Capacitor C 2 two ends are connected with the R2 two ends.Transistor T 2 base stages link to each other with an end of capacitor C 2 (C2 also can), when collector adopts field effect transistor with loudspeaker power drive pipe T1(loudspeaker power drive pipe) grid link to each other grounded emitter.
Concrete principle of work take the operating voltage of loudspeaker as 12V, uses the voltage stabilizing diode of 16-18V to be example.
When electronic horn was subject to large overvoltage pulse and disturbs, power supply input terminal voltage U1 was greater than 18V, so voltage stabilizing diode Z1 just can conducting, U1 is through Z1, R1, and after the R2 dividing potential drop, so that transistor T 2 conductings, signal generation unit shorted to earth.The driving signal is cut off closes, so loudspeaker power drive pipe T1 can't accept the driving signal, thereby has avoided the damage of signal power driving tube T1.When the overvoltage pulse disappearance, when the power supply input voltage returns within the range of normal value, transistor T 2 cut-offs, electronic horn recovers again normal operating conditions.
Because overvoltage pulse is generally ofer short duration, so therefore hundreds of milliseconds only of each time of suspending of motor vehicle electronic loudspeaker do not have much affect to piping.
In the specific embodiment, the structural representation of motor vehicle electronic loudspeaker in Fig. 2 present embodiment.As shown in Figure 2.These motor vehicle electronic loudspeaker comprise: voltage detection unit, audible warning generation unit, electronic switch, loudspeaker power amplification unit.Wherein, can realize voltage detecting function by any one element in voltage comparator exclusive disjunction amplifier or voltage stabilizing diode or the TVS pipe in the voltage detection unit.
When the motor vehicle electronic loudspeaker are interfered, can produce large superpotential, detecting unit can detect input voltage this moment (being superpotential) and exceed specified operating voltage.Electronic switch cuts out just can interrupt the loudspeaker driving signal that the audible warning generation unit sends to the loudspeaker power amplification unit, punctures to avoid the signal power driving tube in the loudspeaker power amplification unit.When having served as loss of voltage, electronic switch is opened, and the audible warning generation unit drives signal to the loudspeaker that the loudspeaker power amplification unit sends normally
Come the motor vehicle electronic loudspeaker of holding circuit except above-mentioned by look-at-me, can when driving signal and produce, control the generation that drives signal in addition, thus the motor vehicle electronic loudspeaker of holding circuit.
In the specific embodiment, Fig. 3 is the structural representation of motor vehicle electronic loudspeaker in the present embodiment.As shown in Figure 3.These motor vehicle electronic loudspeaker comprise: voltage detection unit, audible warning generation unit, loudspeaker power amplification unit, control module.Wherein, whether this control module resets for control audible warning generation unit or whether enters holding state.Can realize voltage detecting function by any one element in voltage comparator exclusive disjunction amplifier or voltage stabilizing diode or the TVS pipe in the voltage detection unit.
When voltage detection unit detected input voltage (being superpotential) greater than rated operational voltage, control module control audible warning generation unit resetted or does etc. pending.Just do not have this moment and drive signal output, thereby can avoid the signal power driving tube of loudspeaker power amplification unit to puncture, play the effect of protection motor vehicle electronic loudspeaker.
In the specific embodiment, Fig. 4 is the structural representation of motor vehicle electronic loudspeaker in the present embodiment.As shown in Figure 4.These motor vehicle electronic loudspeaker comprise: voltage detection unit, audible warning generation unit, loudspeaker power amplification unit, control module.Wherein, this control module is used for amplitude and/or the pulsewidth of the loudspeaker driving signal of control audible warning generation unit generation.Can realize voltage detecting function by any one element in voltage comparator exclusive disjunction amplifier or voltage stabilizing diode or the TVS pipe in the voltage detection unit.
When voltage detection unit detects input voltage (being superpotential) greater than rated operational voltage; control module reduces amplitude and/or the pulsewidth of the loudspeaker driving signal of audible warning generation unit generation; drive signal by the loudspeaker to output and carry out the control of amplitude and/or pulsewidth; avoiding the signal power driving tube to puncture, thus protection motor vehicle electronic loudspeaker.
It should be noted last that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the spirit and scope of technical solutions of the utility model.
Claims (5)
1. motor vehicle electronic loudspeaker is characterized in that, comprising:
Detecting unit is for detection of superpotential overflow fixed working voltage whether;
Control module is used for when superpotential surpasses rated operational voltage, loudspeaker is driven signal control.
2. motor vehicle electronic loudspeaker according to claim 1 is characterized in that, described motor vehicle electronic loudspeaker also comprise the audible warning generation unit; Described control module is electronic switch, is used for determining whether to interrupt the transmission that loudspeaker drive signal based on the testing result of described detecting unit.
3. motor vehicle electronic loudspeaker according to claim 1 is characterized in that, described motor vehicle electronic loudspeaker also comprise the audible warning generation unit; Described control module drives the pulsewidth of signal or/and amplitude for the loudspeaker of controlling described loudspeaker drive signal generation unit generation based on the testing result of described detecting unit.
4. motor vehicle electronic loudspeaker according to claim 1 is characterized in that, described motor vehicle electronic loudspeaker also comprise the audible warning generation unit; Described control module is used for based on the testing result of described detecting unit described audible warning generation unit being resetted or/and Opportunity awaiting control for linear.
5. motor vehicle electronic loudspeaker according to claim 1 is characterized in that, are used in the described detecting unit realizing that the element of measuring ability is voltage comparator exclusive disjunction amplifier or voltage stabilizing diode or TVS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220283851 CN202677821U (en) | 2012-06-15 | 2012-06-15 | Motor vehicle electronic loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220283851 CN202677821U (en) | 2012-06-15 | 2012-06-15 | Motor vehicle electronic loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202677821U true CN202677821U (en) | 2013-01-16 |
Family
ID=47498707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220283851 Expired - Lifetime CN202677821U (en) | 2012-06-15 | 2012-06-15 | Motor vehicle electronic loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202677821U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514871A (en) * | 2012-06-15 | 2014-01-15 | 万喻 | Motor vehicle electronic horn and motor vehicle electronic horn protection method |
| CN104066035A (en) * | 2013-03-21 | 2014-09-24 | 万喻 | Motor vehicle horn long-time sounding protection method and circuit |
-
2012
- 2012-06-15 CN CN 201220283851 patent/CN202677821U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514871A (en) * | 2012-06-15 | 2014-01-15 | 万喻 | Motor vehicle electronic horn and motor vehicle electronic horn protection method |
| CN103514871B (en) * | 2012-06-15 | 2017-08-25 | 万喻 | Motor vehicle electronic horn and the method for protecting motor vehicle electronic horn |
| CN104066035A (en) * | 2013-03-21 | 2014-09-24 | 万喻 | Motor vehicle horn long-time sounding protection method and circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130116 |