EP1666166A1 - Verfahren zur Erzeugung polyfone Signalen - Google Patents
Verfahren zur Erzeugung polyfone Signalen Download PDFInfo
- Publication number
- EP1666166A1 EP1666166A1 EP04028421A EP04028421A EP1666166A1 EP 1666166 A1 EP1666166 A1 EP 1666166A1 EP 04028421 A EP04028421 A EP 04028421A EP 04028421 A EP04028421 A EP 04028421A EP 1666166 A1 EP1666166 A1 EP 1666166A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- logic
- signals
- sound
- whose
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0269—Driving circuits for generating signals continuous in time for generating multiple frequencies
- B06B1/0276—Driving circuits for generating signals continuous in time for generating multiple frequencies with simultaneous generation, e.g. with modulation, harmonics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
Definitions
- the present invention relates to a method for generating a polyphonic sound by means of a piezoelectric type acoustic transducer.
- the driving circuit of such a vibrator conventionally comprises a piezoelectric element and a lift coil connected in parallel on the collector side of an amplification transistor.
- an electrical control signal is applied to the base of the transistor so as to turn it on, the current flows through the electrical coil in accordance with the engagement of said transistor and the voltage rise is applied to the element.
- piezoelectric The electrical signal applied to the base of the transistor is typically a square shaped wave signal. Thus, when the electrical signal drops to zero, the piezoelectric element emits a sound signal.
- patent document CH 630 503 suggests applying to the amplification transistor a fixed frequency signal but whose pulse durations are variable. It is possible, by proceeding in this way, to change the timbre of the acoustic signal produced by the piezoelectric element and thus create the impression of a chime. The sound produced is of better quality but still remains a monophonic sound.
- the present invention relates to a method for driving a piezoelectric acoustic transducer, characterized in that a wave signal of logic type having pulses whose duration is fixed and whose duty cycle or "duty cycle" is less than 0.5.
- the present invention achieves significant energy savings, which is particularly advantageous in the case where the piezoelectric transducer equips a portable instrument such as a wristwatch or a mobile phone whose capabilities Energy storage is limited. It has indeed been found that by reducing the aspect ratio, better known by its English name "duty cycle", the logic control signal of the piezoelectric transducer, in other words by reducing the active phase of this signal and therefore the consumption electrical, it nevertheless retains acoustic properties (noise level, timbre) acceptable.
- At least two logic wave signals of different frequencies are simultaneously applied across a control system of the piezoelectric transducer.
- the present invention proceeds from the general inventive idea of controlling a piezoelectric acoustic transducer by means of a wave signal of logic type whose duration of the pulses is fixed and whose form ratio or "duty cycle" is less than 0 5.
- reducing the duration of the pulses reduces the active phase of the logic signal and therefore the power consumption, while maintaining acceptable acoustic properties.
- choosing a shape ratio of less than 0.5 several different frequency channels can be superimposed simultaneously and thus produce a polyphonic sound.
- FIG. 1 is a schematic representation of a drive circuit of a piezoelectric type acoustic transducer.
- this driving circuit comprises a piezoelectric element 2 and a lifting coil 4 connected in parallel on the collector side of an amplification transistor 6.
- an electrical signal 8 is applied to the base of the transistor 6, it turns on and the current flows through the coil 4, causing a voltage rise across the piezoelectric element 2.
- the electrical signal 8 applied to the base of the transistor 6 is typically a signal Rectangular wave form whose duty cycle or "duty cycle" is less than 0.5.
- the piezoelectric element 2 emits a sound signal. It has been found that such a signal whose active phase is reduced makes it possible to reduce the electrical consumption while preserving acceptable acoustic properties for the acoustic signal produced by the piezoelectric element 2.
- the electrical signal 8 applied to the base of the transistor 6 is produced by a control circuit or synthesizer 10 of the binary adder type comprising an OR logic gate.
- This synthesizer 10 has the ability to multiplex at least two different frequency channels in the time domain, that is to say to achieve the sum in time of at least two wave signals 12a, 12b as represented in FIG. FIG. 2, the control signal 8 applied to the base of the transistor 6 being the result of this time multiplexing of the two signals 12a, 12b.
- the means necessary for the multiplexing of two signals of different frequencies are known to those skilled in the art and will therefore not be described further here.
- the logic signals 12a, 12b are characterized by a short pulse duration t between 50 and 300 ⁇ s, for example of the order of 100 ⁇ s, and a shape ratio or "duty cycle" of less than 0.5. It is recalled that the form ratio of an undulatory type of logic signal is determined by the ratio between the duration t of a pulse and the period T of a period of the signal. Thus, a logical signal whose aspect ratio is 0.5 is a signal which is at its logic level "1" for 50% of the time, and which is at its logic level "0" during the 50% of time remaining.
- the logic signals intended to be multiplexed can be produced by maintaining a fixed pulse duration t and by decreasing the frequency f , which amounts to decrease the value of the form ratio or "duty cycle" DC.
- the "duty cycle" DC can be expressed as the product between the duration t of a pulse and the frequency f of the logic signal.
- the more the shape ratio is reduced the more the spectrum of frequencies emitted by the piezoelectric element is widened. This broadening of the spectrum is accompanied by a redistribution of the energy for each of the frequencies of said spectrum, the energy associated with the fundamental frequency decreasing in favor of the higher frequencies, which is advantageous because the piezoelectric element reacts. less well at low frequencies.
- the DC value of the shape ratio can be reduced until the majority of the acoustic energy remains in an audible frequency band.
Landscapes
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Circuit For Audible Band Transducer (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Saccharide Compounds (AREA)
- Steroid Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Graft Or Block Polymers (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Electromechanical Clocks (AREA)
- Electric Clocks (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04028421A EP1666166A1 (de) | 2004-12-01 | 2004-12-01 | Verfahren zur Erzeugung polyfone Signalen |
AT05803471T ATE464129T1 (de) | 2004-12-01 | 2005-11-14 | Verfahren zur erzeugung eines polyphonen klangs |
JP2007543724A JP2008522227A (ja) | 2004-12-01 | 2005-11-14 | 多声音を生成する方法 |
DE602005020679T DE602005020679D1 (de) | 2004-12-01 | 2005-11-14 | Verfahren zur erzeugung eines polyphonen klangs |
US11/719,721 US20090153221A1 (en) | 2004-12-01 | 2005-11-14 | Polyphonic sound generating method |
KR1020077010313A KR101233004B1 (ko) | 2004-12-01 | 2005-11-14 | 다성음 발생 방법 |
PCT/EP2005/012169 WO2006058608A1 (en) | 2004-12-01 | 2005-11-14 | Polyphonic sound generating method |
EP05803471A EP1819454B1 (de) | 2004-12-01 | 2005-11-14 | Verfahren zur erzeugung eines polyphonen klangs |
CN200580040350XA CN101065194B (zh) | 2004-12-01 | 2005-11-14 | 复调声音产生方法 |
HK08100294.5A HK1109359A1 (en) | 2004-12-01 | 2008-01-09 | Polyphonic sound generating method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04028421A EP1666166A1 (de) | 2004-12-01 | 2004-12-01 | Verfahren zur Erzeugung polyfone Signalen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1666166A1 true EP1666166A1 (de) | 2006-06-07 |
Family
ID=34927600
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04028421A Withdrawn EP1666166A1 (de) | 2004-12-01 | 2004-12-01 | Verfahren zur Erzeugung polyfone Signalen |
EP05803471A Active EP1819454B1 (de) | 2004-12-01 | 2005-11-14 | Verfahren zur erzeugung eines polyphonen klangs |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05803471A Active EP1819454B1 (de) | 2004-12-01 | 2005-11-14 | Verfahren zur erzeugung eines polyphonen klangs |
Country Status (9)
Country | Link |
---|---|
US (1) | US20090153221A1 (de) |
EP (2) | EP1666166A1 (de) |
JP (1) | JP2008522227A (de) |
KR (1) | KR101233004B1 (de) |
CN (1) | CN101065194B (de) |
AT (1) | ATE464129T1 (de) |
DE (1) | DE602005020679D1 (de) |
HK (1) | HK1109359A1 (de) |
WO (1) | WO2006058608A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9900705B2 (en) | 2014-01-23 | 2018-02-20 | Federal Signal Corporation | Tone generation |
JP6098620B2 (ja) * | 2014-12-02 | 2017-03-22 | マツダ株式会社 | 和音用デジタル信号の生成方法および生成装置 |
JP6137150B2 (ja) * | 2014-12-02 | 2017-05-31 | マツダ株式会社 | 和音用デジタル信号の生成方法および生成装置 |
JP6098651B2 (ja) * | 2015-02-10 | 2017-03-22 | マツダ株式会社 | 和音用デジタル信号の生成方法および生成装置 |
JP5916931B1 (ja) * | 2015-07-28 | 2016-05-11 | 衆智達技研株式会社 | 電子式警音器 |
EP3846945B1 (de) * | 2018-09-06 | 2022-06-29 | ABB Schweiz AG | Wandler zur nichtinvasiven messung |
CN113098239A (zh) * | 2021-03-30 | 2021-07-09 | 深圳市雷能混合集成电路有限公司 | 数字电源的控制方法及装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH630503GA3 (de) * | 1977-05-23 | 1982-06-30 | ||
DE3230218A1 (de) * | 1982-08-13 | 1984-02-23 | Braun Ag, 6000 Frankfurt | Elektronische uhr oder uhrenradio mit einem wecksignal unterschiedlicher lautstaerke |
CH649188GA3 (de) * | 1981-07-23 | 1985-05-15 | ||
US4669424A (en) * | 1985-06-07 | 1987-06-02 | Bianco Frank J | Apparatus for and method of repelling pests such as fleas and ticks |
EP1036600A1 (de) * | 1997-12-04 | 2000-09-20 | Namiki Seimitsu Houseki Kabushiki Kaisha | Einrichtung zum antrieb eines schwingungserregers |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5963398U (ja) * | 1982-10-19 | 1984-04-26 | セイコーインスツルメンツ株式会社 | 圧電型スピ−カ駆動回路 |
JPH07219553A (ja) * | 1994-02-04 | 1995-08-18 | Tamura Electric Works Ltd | 圧電ブザー駆動回路 |
CN2248118Y (zh) * | 1995-11-28 | 1997-02-26 | 宣浩 | 锁相式频率跟踪超声波抛光机 |
CN2286439Y (zh) * | 1997-04-08 | 1998-07-22 | 哈尔滨工业大学 | 超声换能器直接驱动电极的微型电火花加工装置 |
JP4033578B2 (ja) * | 1999-04-09 | 2008-01-16 | スター精密株式会社 | 発音体駆動回路および作動音発生装置 |
CN2465824Y (zh) * | 2000-12-30 | 2001-12-19 | 荣德新 | 间歇式超声波清洗机 |
US6559758B2 (en) * | 2001-07-05 | 2003-05-06 | Charles Rey | Multi-tone warning sounder |
ATE295981T1 (de) * | 2001-12-01 | 2005-06-15 | Siemens Building Tech Ag | Akustischer alarmgeber für einen gefahrenmelder |
-
2004
- 2004-12-01 EP EP04028421A patent/EP1666166A1/de not_active Withdrawn
-
2005
- 2005-11-14 EP EP05803471A patent/EP1819454B1/de active Active
- 2005-11-14 AT AT05803471T patent/ATE464129T1/de not_active IP Right Cessation
- 2005-11-14 US US11/719,721 patent/US20090153221A1/en not_active Abandoned
- 2005-11-14 CN CN200580040350XA patent/CN101065194B/zh active Active
- 2005-11-14 KR KR1020077010313A patent/KR101233004B1/ko not_active IP Right Cessation
- 2005-11-14 DE DE602005020679T patent/DE602005020679D1/de active Active
- 2005-11-14 JP JP2007543724A patent/JP2008522227A/ja active Pending
- 2005-11-14 WO PCT/EP2005/012169 patent/WO2006058608A1/en active Application Filing
-
2008
- 2008-01-09 HK HK08100294.5A patent/HK1109359A1/xx not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH630503GA3 (de) * | 1977-05-23 | 1982-06-30 | ||
CH649188GA3 (de) * | 1981-07-23 | 1985-05-15 | ||
DE3230218A1 (de) * | 1982-08-13 | 1984-02-23 | Braun Ag, 6000 Frankfurt | Elektronische uhr oder uhrenradio mit einem wecksignal unterschiedlicher lautstaerke |
US4669424A (en) * | 1985-06-07 | 1987-06-02 | Bianco Frank J | Apparatus for and method of repelling pests such as fleas and ticks |
EP1036600A1 (de) * | 1997-12-04 | 2000-09-20 | Namiki Seimitsu Houseki Kabushiki Kaisha | Einrichtung zum antrieb eines schwingungserregers |
Also Published As
Publication number | Publication date |
---|---|
CN101065194A (zh) | 2007-10-31 |
US20090153221A1 (en) | 2009-06-18 |
KR20070084021A (ko) | 2007-08-24 |
ATE464129T1 (de) | 2010-04-15 |
EP1819454B1 (de) | 2010-04-14 |
HK1109359A1 (en) | 2008-06-06 |
DE602005020679D1 (de) | 2010-05-27 |
CN101065194B (zh) | 2011-04-06 |
WO2006058608A1 (en) | 2006-06-08 |
KR101233004B1 (ko) | 2013-02-13 |
JP2008522227A (ja) | 2008-06-26 |
EP1819454A1 (de) | 2007-08-22 |
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