CN103151035A - Adaptive electronic horn - Google Patents
Adaptive electronic horn Download PDFInfo
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- CN103151035A CN103151035A CN2013100623370A CN201310062337A CN103151035A CN 103151035 A CN103151035 A CN 103151035A CN 2013100623370 A CN2013100623370 A CN 2013100623370A CN 201310062337 A CN201310062337 A CN 201310062337A CN 103151035 A CN103151035 A CN 103151035A
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- chip microcomputer
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- pressure level
- sound pressure
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Abstract
The invention discloses an adaptive electronic horn. The adaptive electronic horn comprises an SCM (single chip microcomputer), a horn, a sound pressure level acquiring circuit and a driving circuit, wherein the horn is electrically connected with the SCM; the sound pressure level acquiring circuit and the driving circuit are electrically connected with the SCM and the horn respectively; the SCM is used for generating scanning pulse to scan the vibration frequency of a horn diaphragm and acquiring the frequency data of the horn diaphragm; the sound pressure level acquiring circuit is used for acquiring the vibration sound pressure level of the horn diaphragm and transmitting the sound pressure level data to the SCM; the SCM is used for calculating resonant frequency according to the frequency data and the sound pressure level data and outputting the resonant frequency to the driving circuit; and the driving circuit is used for driving the horn diaphragm according to the received resonant frequency to make a sound. Automatic detection on mechanical resonant frequency of the electronic horn diaphragm is realized, the horn works at the mechanical resonant frequency of the diaphragm, and the sound pressure level of the electronic horn is maximized in any environment.
Description
Technical field
The present invention relates to the automobile electronic loudspeaker technical field, more particularly, relate to a kind of self-adapting electronic loudspeaker.
Background technology
At present, existing automobile electronic loudspeaker mostly adopts pulse generating circuit, controls driving circuit, controls the break-make of solenoid, realizes adhesive and release to horn diaphragm, sends the sound of fixed frequency.Make sound pressure level reach maximum, need to adjust frequency, diaphragm is operated on its mechanical resonant frequency, this adjusts when dispatching from the factory and fixes.The mechanical resonant frequency of diaphragm can be along with environment temperature and the strong variation of air pressure and is changed, but the frequency of loudspeaker is fixing when dispatching from the factory, so when environment temperature or air pressure changed, loudspeaker were not just to be operated on its membrane mechanical frequency, arbitrarily downgrade will degradation for tucket like this.
Summary of the invention
In view of this, the invention provides a kind of self-adapting electronic loudspeaker, realizing the automatic detection of electronic horn membrane mechanical resonance frequency, and loudspeaker are operated on the mechanical resonant frequency of its diaphragm, realize that electronic horn sound pressure level in any environment maximizes.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of self-adapting electronic loudspeaker comprises: single-chip microcomputer, the loudspeaker that are electrically connected to described single-chip microcomputer, the sound pressure level Acquisition Circuit and the driving circuit that are electrically connected to described single-chip microcomputer and loudspeaker respectively; Wherein:
Described single-chip microcomputer scans for sending the vibration frequency of scanning impulse to the horn diaphragm of described loudspeaker, obtains the frequency data of described horn diaphragm;
Described sound pressure level Acquisition Circuit is arbitrarily downgraded for the chatter that obtains described horn diaphragm, and described sound pressure level data is sent to described single-chip microcomputer;
Described single-chip microcomputer is used for calculating resonance frequency according to described frequency data and described sound pressure level data, and exports described resonance frequency to described driving circuit;
Described driving circuit is used for driving described horn diaphragm according to the described resonance frequency that receives and sounds.
Preferably, described single-chip microcomputer comprises: AD acquisition module, frequency computation part module and pulse generation and scan module; Wherein:
Described pulse generation and scan module scan for sending the vibration frequency of scanning impulse to described horn diaphragm, and the frequency data of the described horn diaphragm that will obtain are sent to described frequency computation part module;
Described AD acquisition module is arbitrarily downgraded for the chatter that obtains described horn diaphragm, and described sound pressure level data is sent to described frequency computation part module;
Described frequency computation part module calculates described resonance frequency according to described frequency data and described sound pressure level data, and exports described resonance frequency to described driving circuit.
Preferably, described self-adapting electronic loudspeaker also comprises power supply chip;
Described power supply chip is electrically connected to described single-chip microcomputer, for described single-chip microcomputer provides power supply.
Preferably, described driving circuit comprises: the first resistance, the second resistance, the first electric capacity, inductance and NMOS pipe; Wherein:
Described inductance one end is electrically connected to described power supply chip, and the other end is electrically connected to the drain electrode of described NMOS pipe, the described horn diaphragm sounding of adhesive during by the described inductance energising of described NMOS management and control system;
Be connected in parallel on the two ends of described inductance after described the first resistance and the first capacitances in series, be used for absorbing the inverse electromotive force of described NMOS pipe when closing described inductance;
Described the second resistance one end is electrically connected to described single-chip microcomputer, and the other end is electrically connected to the grid of described NMOS pipe, forms the described single-chip microcomputer of current-limiting resistance protection.
Preferably, described sound pressure level Acquisition Circuit comprises: the 3rd resistance, acoustic pickup and the second electric capacity; Wherein:
Described the 3rd resistance one end is electrically connected to described power supply chip, and the other end is electrically connected to described acoustic pickup;
Described the second electric capacity one end is electrically connected to described acoustic pickup, and the other end is electrically connected to described single-chip microcomputer.
Can find out from above-mentioned technical scheme, a kind of self-adapting electronic loudspeaker disclosed by the invention, send scanning impulse by single-chip microcomputer the vibration frequency of horn diaphragm is scanned the frequency data that get horn diaphragm, the chatter that obtains horn diaphragm by acoustic pickup is simultaneously arbitrarily downgraded, and the chatter that gets is arbitrarily downgraded be sent to single-chip microcomputer, single-chip microcomputer calculates resonance frequency according to the frequency data and the sound pressure level data that receive, sounds by the diaphragm that driving circuit drives loudspeaker according to the resonance frequency that calculates.Therefore, by chip microcontroller the automatic detection of electronic horn membrane mechanical resonance frequency, and loudspeaker are operated on the mechanical resonant frequency of its diaphragm, realize that electronic horn sound pressure level in any environment maximizes.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the disclosed a kind of self-adapting electronic loudspeaker of the embodiment of the present invention;
Fig. 2 is the structural representation of the disclosed a kind of self-adapting electronic loudspeaker of another embodiment of the present invention;
Fig. 3 is the circuit theory diagrams of a kind of self-adapting electronic loudspeaker disclosed by the invention;
Fig. 4 is the installation drawing of a kind of self-adapting electronic loudspeaker disclosed by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention discloses a kind of self-adapting electronic loudspeaker, realizing the automatic detection of electronic horn membrane mechanical resonance frequency, and loudspeaker are operated on the mechanical resonant frequency of its diaphragm, realize that electronic horn sound pressure level in any environment maximizes.
As shown in Figure 1, a kind of self-adapting electronic loudspeaker comprises: single-chip microcomputer 101, the loudspeaker 102 that are electrically connected to single-chip microcomputer 101, the sound pressure level Acquisition Circuit 103 and the driving circuit 104 that are electrically connected to single-chip microcomputer 101 and loudspeaker 102 respectively; Wherein:
Single-chip microcomputer 101 scans for sending the vibration frequency of scanning impulse to loudspeaker 102 diaphragms, obtains the frequency data of loudspeaker 102 diaphragms;
Sound pressure level Acquisition Circuit 103 is arbitrarily downgraded for the chatter that obtains loudspeaker 102 diaphragms, and described sound pressure level data are sent to single-chip microcomputer 101;
Single-chip microcomputer 101 is used for calculating resonance frequency according to described frequency data and described sound pressure level data, and exports described resonance frequency to driving circuit 104;
Driving circuit 104 is used for sounding according to the diaphragm of the described resonance frequency driving loudspeaker 102 that receive.
In the above-described embodiments, when every secondary source is powered to loudspeaker 102, at first single-chip microcomputer 101 sends scanning impulse, adjust frequency from high to low, the frequency range of adjusting within the limits prescribed, vibration frequency to loudspeaker 102 diaphragms scans from high to low, gets the frequency data of loudspeaker 102 diaphragms;
Acoustic pickup 103 picks up the chatter of loudspeaker 102 diaphragms and arbitrarily downgrades, the sound pressure level simulating signal of picking up is inputed to single-chip microcomputer 101, single-chip microcomputer 101 is recorded voltage-boosting stage data and the frequency data of collection, calculate resonance frequency according to voltage-boosting stage data and frequency data, the maximum point of sound pressure level is exactly the frequencies of loudspeaker 102 diaphragms when resonance;
Single-chip microcomputer 101 exports the resonance frequency that calculates to driving circuit 104, and driving circuit 104 is sounded according to the diaphragm vibration that receives resonance frequency driving loudspeaker 102.
In the above-described embodiments, by chip microcontroller the automatic detection of electronic horn membrane mechanical resonance frequency, and loudspeaker are operated on the mechanical resonant frequency of its diaphragm, realize that electronic horn sound pressure level in any environment maximizes.
Another embodiment of the present invention also discloses a kind of self-adapting electronic loudspeaker, as shown in Figure 2, comprising: single-chip microcomputer 201, the loudspeaker 202 that are electrically connected to single-chip microcomputer 201, the sound pressure level Acquisition Circuit 203 that is electrically connected to single-chip microcomputer 201 and loudspeaker 202 respectively and driving circuit 204, the power supply chip 205 that is electrically connected to single-chip microcomputer 201; Wherein:
Single-chip microcomputer 201 comprises AD acquisition module 2011, frequency computation part module 2012 and pulse generation and scan module 2013; Wherein:
Pulse generation and scan module 2013 is used for sending scanning impulse the vibration frequency of loudspeaker 202 diaphragms scanned, and the frequency data of loudspeaker 202 diaphragms that obtain are sent to frequency computation part module 2012;
Sound pressure level Acquisition Circuit 203 is used for obtaining the chatter of loudspeaker 202 diaphragms arbitrarily downgrades, and the chatter that obtains is arbitrarily downgraded is sent to AD acquisition module 2011, and AD acquisition module 2011 is used for described sound pressure level data are sent to frequency computation part module 2012;
Frequency computation part module 2012 is used for calculating resonance frequency according to described frequency data and described sound pressure level data, and exports described resonance frequency to driving circuit 204;
As shown in Figure 3, concrete for the circuit theory diagrams of a kind of self-adapting electronic loudspeaker disclosed by the invention, diode D1 of power positive end series connection can protect whole circuit when reverse power connection.U1 is the NMOS pipe, drives telefault L1.L1 is telefault, and it is wrapped on iron core, forms electromagnet, removes adhesive horn diaphragm sounding during energising.The first resistance R 1 and the first capacitor C 1 consist of absorption circuit, the inverse electromotive force of inductance L 1 when being absorbed in NMOS pipe U1 and closing, and protection NMOS pipe UI also reduces electromagnetic interference (EMI).U2 is single-chip microcomputer, and its IO mouth 5 pin output pulse waveforms are controlled the switch that NMOS manages U1.The second resistance R 2 is current-limiting resistance, the IO mouth of protection single-chip microcomputer.Acoustic pickup U4, the 3rd resistance R 3 and the second capacitor C 2 consist of the sound collection circuit, and the sound that acoustic pickup U4 gathers is by the second capacitor C 2, and the AD collection pin 6 that the backdrop tone signal is input to single-chip microcomputer gathers.U3 is power supply chip, the supply voltage of 12V is converted to 5V, for single-chip microcomputer.In the present invention, single-chip microcomputer need not to use external clock, because each startup all can be recomputated existing horn diaphragm frequency.
The whole course of work of circuit is that when Power supply, single-chip microcomputer begins to carry out initial work, after initialization was completed, single-chip microcomputer was by IO mouth 5 pin output pulse signals, and frequency begins scanning by 550Hz, frequency interval 1Hz, residence time 2ms, the termination frequency is 350Hz.Carry out the collection of sound pressure level by the AD port when stopping, and image data is calculated.After scanning is completed, the data of having calculated to be processed, the data assignment of handling is to the pulse generation register, and NMOS pipe drive coil is controlled in unbalanced pulse output, sounds.
The data computational algorithm is, establishing the current sound level signal that collects is S, and current maximum sound level is Sm, current sound level signal sequence N, sequence count variable n.
If initial value Sm=0, N=0, n=0;
If S〉Sm, Sm=S, N=n;
Each scanning n adds 1;
When the end of scan, output frequency=550-N.Dutycycle is made as 67%, the power during with the increase adhesive.
As shown in Figure 4, concrete for the installation drawing of a kind of self-adapting electronic loudspeaker disclosed by the invention, 1 is moving iron core, and 2 is coil, and 3 is static iron core, and 4 is horn diaphragm, and 5 is housing, and 6 is circuit board and circuit board box.Coil 2 lead ends are welded to circuit board 6, due to electromagnetic force, will move the downward adhesive of iron core 1 when energising, and moving iron core is because the elastic force of diaphragm 4 upwards rebounds when outage, and so constantly adhesive, resilience make diaphragm generation of vibration sound.Acoustic pickup is welded on circuit board, and is relative with diaphragm, is beneficial to sound signal collecting.The NMOS pipe is fixed on shell, is beneficial to heat radiation.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a self-adapting electronic loudspeaker, is characterized in that, comprising: single-chip microcomputer, the loudspeaker that are electrically connected to described single-chip microcomputer, the sound pressure level Acquisition Circuit and the driving circuit that are electrically connected to described single-chip microcomputer and loudspeaker respectively; Wherein:
Described single-chip microcomputer scans for sending the vibration frequency of scanning impulse to the horn diaphragm of described loudspeaker, obtains the frequency data of described horn diaphragm;
Described sound pressure level Acquisition Circuit is arbitrarily downgraded for the chatter that obtains described horn diaphragm, and described sound pressure level data is sent to described single-chip microcomputer;
Described single-chip microcomputer is used for calculating resonance frequency according to described frequency data and described sound pressure level data, and exports described resonance frequency to described driving circuit;
Described driving circuit is used for driving described horn diaphragm according to the described resonance frequency that receives and sounds.
2. self-adapting electronic loudspeaker according to claim 1, is characterized in that, described single-chip microcomputer comprises: AD acquisition module, frequency computation part module and pulse generation and scan module; Wherein:
Described pulse generation and scan module scan for sending the vibration frequency of scanning impulse to described horn diaphragm, and the frequency data of the described horn diaphragm that will obtain are sent to described frequency computation part module;
Described AD acquisition module is arbitrarily downgraded for the chatter that obtains described horn diaphragm, and described sound pressure level data is sent to described frequency computation part module;
Described frequency computation part module is used for calculating described resonance frequency according to described frequency data and described sound pressure level data, and exports described resonance frequency to described driving circuit.
3. self-adapting electronic loudspeaker according to claim 1 and 2, is characterized in that, also comprises power supply chip;
Described power supply chip is electrically connected to described single-chip microcomputer, for described single-chip microcomputer provides power supply.
4. self-adapting electronic loudspeaker according to claim 3, is characterized in that, described driving circuit comprises: the first resistance, the second resistance, the first electric capacity, inductance and NMOS pipe; Wherein:
Described inductance one end is electrically connected to described power supply chip, and the other end is electrically connected to the drain electrode of described NMOS pipe, the described horn diaphragm sounding of adhesive during by the described inductance energising of described NMOS management and control system;
Be connected in parallel on the two ends of described inductance after described the first resistance and the first capacitances in series, be used for absorbing the inverse electromotive force of described NMOS pipe when closing described inductance;
Described the second resistance one end is electrically connected to described single-chip microcomputer, and the other end is electrically connected to the grid of described NMOS pipe, forms the described single-chip microcomputer of current-limiting resistance protection.
5. self-adapting electronic loudspeaker according to claim 4, is characterized in that, described sound pressure level Acquisition Circuit comprises: the 3rd resistance, acoustic pickup and the second electric capacity; Wherein:
Described the 3rd resistance one end is electrically connected to described power supply chip, and the other end is electrically connected to described acoustic pickup;
Described the second electric capacity one end is electrically connected to described acoustic pickup, and the other end is electrically connected to described single-chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062337.0A CN103151035B (en) | 2013-02-27 | 2013-02-27 | A kind of self-adapting electronic loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310062337.0A CN103151035B (en) | 2013-02-27 | 2013-02-27 | A kind of self-adapting electronic loudspeaker |
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| CN103151035A true CN103151035A (en) | 2013-06-12 |
| CN103151035B CN103151035B (en) | 2015-12-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014026565A1 (en) * | 2012-08-16 | 2014-02-20 | Wan Yu | Intelligent electronic horn and implementation method therefor |
| CN106291171A (en) * | 2016-07-28 | 2017-01-04 | 青岛海信智能商用系统有限公司 | Buzzer volume calibration steps, device and system and frequency sound test frock |
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| 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 |
| CN201114735Y (en) * | 2007-02-02 | 2008-09-10 | 上海实业交通电器有限公司 | Frequency self-adapted electronic horn |
| CN201600888U (en) * | 2009-11-03 | 2010-10-06 | 胡典兵 | Inductive self-adaptive electronic trumpet |
| CN202679592U (en) * | 2012-07-18 | 2013-01-16 | 万喻 | Self-adaptive sounding electronic speaker |
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2013
- 2013-02-27 CN CN201310062337.0A patent/CN103151035B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201114735Y (en) * | 2007-02-02 | 2008-09-10 | 上海实业交通电器有限公司 | Frequency self-adapted electronic horn |
| CN201600888U (en) * | 2009-11-03 | 2010-10-06 | 胡典兵 | Inductive self-adaptive electronic trumpet |
| CN202679592U (en) * | 2012-07-18 | 2013-01-16 | 万喻 | Self-adaptive sounding electronic speaker |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014026565A1 (en) * | 2012-08-16 | 2014-02-20 | Wan Yu | Intelligent electronic horn and implementation method therefor |
| US9646467B2 (en) | 2012-08-16 | 2017-05-09 | Yu Wan | Intelligent electronic horn and implementation method thereof |
| CN106291171A (en) * | 2016-07-28 | 2017-01-04 | 青岛海信智能商用系统有限公司 | Buzzer volume calibration steps, device and system and frequency sound test frock |
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| Publication number | Publication date |
|---|---|
| CN103151035B (en) | 2015-12-23 |
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hengrun Technology Co., Ltd Address before: 8 / F, block B, No. 11, Anxiang Beili, Chaoyang District, Beijing 100101 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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