CN101556466B - Method for automatically searching and fixing natural frequency of electric horn of motor vehicle - Google Patents
Method for automatically searching and fixing natural frequency of electric horn of motor vehicle Download PDFInfo
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- CN101556466B CN101556466B CN200910061994A CN200910061994A CN101556466B CN 101556466 B CN101556466 B CN 101556466B CN 200910061994 A CN200910061994 A CN 200910061994A CN 200910061994 A CN200910061994 A CN 200910061994A CN 101556466 B CN101556466 B CN 101556466B
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Abstract
The invention relates to a method for automatically searching and fixing natural frequency of the electric horn of a motor vehicle, which utilizes a singlechip to be gradually increased or reduced according to the sequence of every 1/4Hz within the frequency range of 240-650Hz and utilizes the A/D conversion function of the singlechip to lead the pin of the singlechip with the A/D conversion function to sample the tube voltage drop of a field-effect power tube at every gradually increased or reduced frequency point, wherein the field-effect power tube is used for controlling the electric horncoil. The sampled voltage drop is used for calculating the inductance of the controlled electric horn by a singlechip algorithm routine, the frequency value or period value of the frequency point is selected as the natural frequency value or natural period value of the electric horn when the inductance value of the controlled electric horn is the maximum, and the value is memorized in the EEPROM or FLASH of the singlechip. The method has the advantages of novel concept, effective method and simpleness, convenience and feasibility.
Description
Technical field
The invention belongs to electric horn of motor vehicle non-contact technology, electric horn of motor vehicle electronization technical field, relate to natural frequency of electric horn and seek fixing means, particularly method for automatically searching and fixing natural frequency of electric horn of motor vehicle.
Background technology
Know that according to the applicant searching technique for fixing of current mobility car natural frequency of electric horn still is in the stage of manual shift natural frequency of electric horn, its technology is summarised as as follows:
1) adopts multivibrator control electric horn technology.Its RC multivibrator that utilizes Resistor-Capacitor Unit to constitute produces the RC vibration; By the output frequency of this multivibrator of capacity decision of the resistance of resistance R and capacitor C, the resistance through the manual shift resistance R and the capacity of capacitor C are regulated the output frequency of this multivibrator.
2) adopt Single-chip Controlling electric horn technology.Existing has two kinds, a kind of be with crystal oscillator as signal source, make the single-chip microcomputer output frequency adapt to natural frequency of electric horn through single-chip microcomputer being write distinct program.Another kind be with RC vibration as single-chip microcomputer external clock signal, the capacity of resistance and capacitor C through the manual shift resistance R, thus make the single-chip microcomputer output frequency adapt to the electronic horn natural frequency.
3) adopt sensor to add control circuit control electric horn technology.Utilize sensors such as Hall, light idol to substitute the contact, the sensitive time of manual shift Hall and light coupling device spare adapts to natural frequency of electric horn.
More than several kinds of control modes to electric horn; All being based upon manual shift controller output frequency adapts on the basis of natural frequency of electric horn; Fail to realize the natural frequency of electric horn of motor vehicle fixing robotization of searching automatically; More can not accurately measure natural frequency of electric horn of motor vehicle, be difficult to simplify the production technology of motor vehicle electronic loudspeaker.
Summary of the invention
The objective of the invention is,, realize that automatic searching of natural frequency of electric horn fixed, propose method for automatically searching and fixing natural frequency of electric horn of motor vehicle in order to overcome the deficiency of above-mentioned prior art.
Technical solution of the present invention is, adopt with the crystal oscillator be the single-chip microcomputer of clock as the control core, the frequency finder is gone in programming in single-chip microcomputer; By single-chip microcomputer running frequency finder, the control wave that the single-chip microcomputer output duty cycle is 1/3, every 1/4Hz order frequency increments or order frequency are successively decreased is through the fet power pipe of this pulse signal controlling and driving electric horn coil; Single-chip microcomputer in the 650Hz frequency band, is selected frequency according to the control wave that every 1/4Hz increases progressively in proper order or order is successively decreased at 240Hz; Utilize the A/D translation function of single-chip microcomputer, by the pin with A/D translation function of single-chip microcomputer each increase progressively or the frequency that successively decreases on, the tube voltage drop of the fet power pipe of control electric horn coil is sampled; And with the voltage drop value input single-chip microcomputer that samples; Algorithm routine through single-chip microcomputer calculates the induction reactance of controlled electric horn; Choose the induction reactance value of the controlled electric horn frequency when maximum; According to the design feature of controlled electric horn, confirm the frequency values of this frequency or natural frequency value or the natural period value that periodic quantity is controlled electric horn, deposit this value in single-chip microcomputer.
It is characterized in that, the natural frequency value of controlled electric horn or the periodic quantity of natural frequency are stored among the single-chip microcomputer inner EEPROM or FLASH.
It is characterized in that, the natural frequency value of controlled electric horn or the periodic quantity of natural frequency are stored among the EEPROM or FLASH of the outside expansion of single-chip microcomputer.
Thereby searching is fixing automatically to realize natural frequency of electric horn of motor vehicle.
Advantage of the present invention is that novel, method is effective, and is simple and easy to do.Realized the fixing robotization of searching automatically of motor vehicle electronic natural frequency of electric horn.Make the measurement of motor vehicle electronic natural frequency of electric horn more accurate.Simplified the production technology of motor vehicle electronic electric horn.
Description of drawings
Fig. 1, use circuit block diagram of the present invention
Fig. 2, use circuit theory diagrams of the present invention
Fig. 3, use program flow diagram of the present invention
Embodiment
Like Fig. 1, Fig. 2, shown in Figure 3, in using embodiments of the invention, anti-reverse unit 2 is made up of diode D1, damages the circuit elements device when preventing the circuit reversal connection.Voltage regulation unit 3 is made up of voltage stabilizing diode D2, resistance R 1 and capacitor C 2.Single-chip microcomputer 5 is made up of integrated chip PIC12F675, crystal oscillator Y1 and reset circuit.Power amplification unit 4 is made up of fet power pipe Q1.Voltage acquisition unit 6 is made up of the A/D modular converter of resistance and single-chip microcomputer 5.When the horn of motor vehicle button was pressed, power supply 1 was connected, because anti-reverse unit 2 and voltage regulation unit 3 connect with power supply 1, the The whole control circuit carries out anti-reverse protection through anti-reverse unit 2.The solenoid of power amplification unit 4 and loudspeaker 7 connects, and single-chip microcomputer 5 output duty cycle when energising is the control square wave of 1/3 increasing or decreasing frequency, controlling filed effect power tube Q1, and fet power pipe Q1 drives the solenoid of loudspeaker 7.With the voltage acquisition unit 6 that power amplification 4, single-chip microcomputer 5 connect, the tube voltage drop of on the frequency of each increasing or decreasing frequency, gathering the fet power pipe Q1 of power amplification 4, and with the voltage drop value input single-chip microcomputer 5 that samples.The voltage drop value that samples is calculated the induction reactance of controlled electric horn through the single-chip microcomputer algorithm routine; Choose the induction reactance value of the controlled electric horn frequency when maximum; According to this electric horn design feature, confirm the frequency values of this frequency or natural frequency value or the natural period value that periodic quantity is controlled electric horn.The periodic quantity of this controlled natural frequency of electric horn value or natural frequency of electric horn is deposited in the data-carrier store of single-chip microcomputer 5.When frequency sweeping finishes, the periodic quantity of natural frequency of electric horn value of obtaining or natural frequency write among inner EEPROM of single-chip microcomputer 5 or the FLASH and store, perhaps the periodic quantity of natural frequency of electric horn value of obtaining or natural frequency is write among EEPROM or the FLASH of single-chip microcomputer 5 outside expansions and stored.
Single-chip microcomputer 5 is selected the core devices of PIC12F675 model single-chip microcomputer as control in an embodiment of the present invention for use; Selecting IRF540 for use is power amplification unit 4; PIC12F675 model single-chip microcomputer includes A/D converter module, EEPROM; The drain electrode of IRF540 fet power pipe, source electrode also are connected to parasitic Zener diode, the back-emf of the horn coil of can effectively releasing.Like Fig. 2, capacitor C 1 is connected between VDD and the GND, improves the Electro Magnetic Compatibility of entire circuit.The D1 positive pole meets VDD, and an end of negative pole connecting resistance R1 and horn coil makes horn coil and control circuit receive the anti-reverse protection of D1.Resistance R 1 one termination D1 negative poles, an end voltage stabilizing diode D2 negative pole.The positive pole of voltage stabilizing diode D2 meets GND.Capacitor C 2 one termination D2 negative poles, an end D2 anode.1 pin that connects end and single-chip microcomputer altogether of resistance R 2, voltage stabilizing diode D2, capacitor C 2 and resistance R 1 joins.Resistance R 1, voltage stabilizing diode D2, the capacitor C 2 common stabilized voltage supplys that constitute single-chip microcomputer.1 pin of resistance R 2 one termination single-chip microcomputers, the other end of resistance R 2 connects 4 pin of single-chip microcomputer 5, makes single-chip microcomputer 5 active homings.8 pin of single-chip microcomputer 5 meet GND.1 pin of crystal oscillator Y1 connects 2 pin of single-chip microcomputer 5, and 2 pin of crystal oscillator Y1 connect 3 pin of single-chip microcomputer 5,2 pin of capacitor C 3 one termination single-chip microcomputers 5; Capacitor C 3 other end GND; 3 pin of capacitor C 4 one termination single-chip microcomputers 5, capacitor C 4 other end GND, crystal oscillator Y1, capacitor C 3 and capacitor C 4 are formed the external clock of single-chip microcomputer 5.7 pin of resistance R 3 one termination single-chip microcomputers 5, the drain electrode of resistance R 3 another termination fet power pipe Q1 makes single-chip microcomputer 5 gather fet power pipe Q1 tube voltage drop through resistance R 3.The source electrode of Q1 meets GND.The negative pole of loudspeaker LS1 (horn coil) termination D1, the drain electrode of another termination fet power pipe of loudspeaker LS1 Q1, the grid of fet power pipe Q1 connects 5 pin of single-chip microcomputer 5, and 6 pin of single-chip microcomputer 5 are unsettled.
The first course of work of entire circuit is following:
1) during circuit energized 1, crystal oscillator Y1 starting of oscillation, single-chip microcomputer 5 resets.
2) single-chip microcomputer 5 operation initialize routines.
3) whether single-chip microcomputer 5 operation natural frequencys scan determining program, the searching fixation mark of inquiry loudspeaker natural frequency in EEPROM.
4) whether single-chip microcomputer 5 operation loudspeaker natural frequency scannings fix determining program, and whether the searching fixation mark of inquiry loudspeaker natural frequency in EEPROM or FLASH is carried out natural frequency scanning to electric horn and fixedly judged.
5) single-chip microcomputer 5 operation natural frequency scanning sequences; The control square wave that 5 pin of single-chip microcomputer 5 are exported 1/3 dutycycle, the every 1/4HZ of frequency increases progressively in proper order or order is successively decreased; The break-make of controlling filed effect power tube Q1; Single-chip microcomputer 5 is gathered fet power pipe tube voltage drop through resistance R 3 and single-chip microcomputer 5 inner A/D converter modules on the frequency of each increasing or decreasing frequency, and with the voltage drop value input single-chip microcomputer 5 that samples.
A) 5 pairs of voltage drop values that sample of single-chip microcomputer calculate loudspeaker induction reactance through the algorithm routine of single-chip microcomputer 5; Choose the induction reactance value of the controlled electric horn frequency when maximum; According to this controlled electric horn design feature, confirm the frequency values of this frequency or natural frequency value or the natural period value that periodic quantity is tested electric horn.
B) periodic quantity of tested natural frequency of electric horn value or natural frequency of electric horn is deposited in the data-carrier store of single-chip microcomputer 5.
6) when frequency sweeping finishes, the periodic quantity of natural frequency of electric horn value or natural frequency write among inner EEPROM of single-chip microcomputer 5 or the FLASH and store; Perhaps the periodic quantity of natural frequency of electric horn value or natural frequency is write among single-chip microcomputer 5 outside EEPROM that expand or the FLASH and stored, the searching of mark loudspeaker natural frequency fixedly finishes in EEPROM or FLASH simultaneously.The entire circuit course of normal operation is following:
1) during circuit energized 1, crystal oscillator Y1 starting of oscillation, single-chip microcomputer 5 resets.
2) single-chip microcomputer 5 operation initialize routines.
3) whether single-chip microcomputer 5 operation natural frequencys scan determining program, and whether the searching fixation mark of inquiry loudspeaker natural frequency in EEPROM or FLASH is carried out natural frequency scanning to electric horn and fixedly judged.
4) scanning of loudspeaker natural frequency fixedly finishes.
5) periodic quantity of natural frequency of electric horn value or natural frequency among single-chip microcomputer extraction EEPROM or the FLASH.
6) periodic quantity of single-chip microcomputer operation natural frequency of electric horn value or natural frequency.
7) control circuit output natural frequency of electric horn control signal.
8) FET rhythm with natural frequency of electric horn under the control of natural frequency of electric horn control signal drives horn coil.
9) electric horn is promptly rung on natural frequency.
Claims (3)
1. method for automatically searching and fixing natural frequency of electric horn of motor vehicle, adopting with the crystal oscillator is that the single-chip microcomputer (5) of clock is as control core, write frequency finder in single-chip microcomputer (5); By single-chip microcomputer (5) running frequency finder, the control wave that single-chip microcomputer (5) output duty cycle is 1/3, every 1/4Hz order frequency increments or order frequency are successively decreased is through the fet power pipe of this pulse signal controlling and driving electric horn coil; Single-chip microcomputer (5) in the 650Hz frequency band, is selected frequency according to the control wave that every 1/4Hz increases progressively in proper order or order is successively decreased at 240Hz; Utilize the A/D translation function of single-chip microcomputer (5), by the pin with A/D translation function of single-chip microcomputer (5) each increase progressively or the frequency that successively decreases on, the tube voltage drop of the fet power pipe of control electric horn coil is sampled; And with the voltage drop value input single-chip microcomputer (5) that samples; Algorithm routine through single-chip microcomputer (5) calculates the induction reactance of controlled electric horn; Choose the induction reactance value of the controlled electric horn frequency when maximum; According to the design feature of controlled electric horn, confirm that the frequency values of this frequency is the natural frequency value of controlled electric horn, confirm that perhaps the periodic quantity of this frequency is the periodic quantity of the natural frequency of controlled electric horn; Deposit the periodic quantity of the natural frequency of the natural frequency value of the controlled electric horn of confirming or the controlled electric horn confirmed in single-chip microcomputer (5).
2. method for automatically searching and fixing natural frequency of electric horn of motor vehicle according to claim 1 is characterized in that, the periodic quantity of natural frequency value or natural frequency is stored among single-chip microcomputer (5) the inner EEPROM or FLASH.
3. method for automatically searching and fixing natural frequency of electric horn of motor vehicle according to claim 1 is characterized in that, the periodic quantity of natural frequency value or natural frequency is stored among the EEPROM or FLASH of the outside expansion of single-chip microcomputer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910061994A CN101556466B (en) | 2009-05-08 | 2009-05-08 | Method for automatically searching and fixing natural frequency of electric horn of motor vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910061994A CN101556466B (en) | 2009-05-08 | 2009-05-08 | Method for automatically searching and fixing natural frequency of electric horn of motor vehicle |
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| CN101556466A CN101556466A (en) | 2009-10-14 |
| CN101556466B true CN101556466B (en) | 2012-09-26 |
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| CN200910061994A Expired - Fee Related CN101556466B (en) | 2009-05-08 | 2009-05-08 | Method for automatically searching and fixing natural frequency of electric horn of motor vehicle |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950268A (en) * | 2010-05-04 | 2011-01-19 | 工业和信息化部电子第五研究所 | Real-time monitoring scheme for clock frequency of controller |
| CN101934758B (en) * | 2010-09-30 | 2012-10-03 | 曹志才 | Klaxon primary sound pressure level stabilization control method |
| CN101986722B (en) * | 2010-09-30 | 2013-04-10 | 曹志才 | Advanced acoustic pressure level stabilizing control method of electric horn |
| CN101980335B (en) * | 2010-09-30 | 2013-04-10 | 曹志才 | Intelligent control method and device for electric horn |
| CN103500574B (en) * | 2012-08-16 | 2017-06-27 | 万喻 | A kind of intelligent electronic horn and its implementation |
| CN103219001B (en) * | 2013-03-13 | 2015-10-28 | 上海实业交通电器有限公司 | A kind of method and loudspeaker finding and determine loudspeaker natural frequency |
| CN104972966A (en) * | 2014-04-11 | 2015-10-14 | 万喻 | Method for solving problem of EMC electromagnetic interference of horn of motor vehicle or ship and horn |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4307964A (en) * | 1981-02-25 | 1981-12-29 | The United States Of America As Represented By The Secretary Of The Interior | System for maintaining high resonance during sonic agglomeration |
| US4566085A (en) * | 1982-01-19 | 1986-01-21 | Wein Products, Inc. | High intensity ultrasonic generator |
| CN1076802A (en) * | 1992-01-30 | 1993-09-29 | 斯帕顿公司 | Be used to regulate the method and apparatus of horn for vehicle |
| CN1170896A (en) * | 1997-07-29 | 1998-01-21 | 哈尔滨电子应用技术研究所 | Method and device for monolithic processor controlled sounding and frequency stabilizing electric horn |
| CN1658097A (en) * | 2004-02-19 | 2005-08-24 | 哈尔滨工业大学固泰电子有限责任公司 | Adjusting method for horn working parameter |
| EP1710022A2 (en) * | 2005-04-04 | 2006-10-11 | WERMA Signaltechnik GmbH + Co. KG | Signalling device comprising an acoustic signal generator |
-
2009
- 2009-05-08 CN CN200910061994A patent/CN101556466B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4307964A (en) * | 1981-02-25 | 1981-12-29 | The United States Of America As Represented By The Secretary Of The Interior | System for maintaining high resonance during sonic agglomeration |
| US4566085A (en) * | 1982-01-19 | 1986-01-21 | Wein Products, Inc. | High intensity ultrasonic generator |
| CN1076802A (en) * | 1992-01-30 | 1993-09-29 | 斯帕顿公司 | Be used to regulate the method and apparatus of horn for vehicle |
| CN1170896A (en) * | 1997-07-29 | 1998-01-21 | 哈尔滨电子应用技术研究所 | Method and device for monolithic processor controlled sounding and frequency stabilizing electric horn |
| CN1658097A (en) * | 2004-02-19 | 2005-08-24 | 哈尔滨工业大学固泰电子有限责任公司 | Adjusting method for horn working parameter |
| EP1710022A2 (en) * | 2005-04-04 | 2006-10-11 | WERMA Signaltechnik GmbH + Co. KG | Signalling device comprising an acoustic signal generator |
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| CN101556466A (en) | 2009-10-14 |
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Address after: 430071 No. 34, Xiao Hong Shandong District, Wuhan, Hubei, Wuchang Applicant after: HUBEI INSTITUTE OF AUTOMATION Co.,Ltd. Co-applicant after: Wang Lingchao Address before: 430071 Xiao Hong, Wuchang District, Wuhan District, Hubei, Shandong, 34 Applicant before: Hubei Prov. Automation Inst. Co-applicant before: Wang Lingchao |
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