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EP1666166A1 - Verfahren zur Erzeugung polyfone Signalen - Google Patents

Verfahren zur Erzeugung polyfone Signalen Download PDF

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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Withdrawn
Application number
EP04028421A
Other languages
English (en)
French (fr)
Inventor
Fabien Aeby
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asulab AG
Original Assignee
Asulab AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asulab AG filed Critical Asulab AG
Priority to EP04028421A priority Critical patent/EP1666166A1/de
Priority to US11/719,721 priority patent/US20090153221A1/en
Priority to DE602005020679T priority patent/DE602005020679D1/de
Priority to CN200580040350XA priority patent/CN101065194B/zh
Priority to JP2007543724A priority patent/JP2008522227A/ja
Priority to PCT/EP2005/012169 priority patent/WO2006058608A1/en
Priority to AT05803471T priority patent/ATE464129T1/de
Priority to EP05803471A priority patent/EP1819454B1/de
Priority to KR1020077010313A priority patent/KR101233004B1/ko
Publication of EP1666166A1 publication Critical patent/EP1666166A1/de
Priority to HK08100294.5A priority patent/HK1109359A1/xx
Withdrawn legal-status Critical Current

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Classifications

    • 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)
  • Saccharide Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Steroid Compounds (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Graft Or Block Polymers (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Electric Clocks (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Electromechanical Clocks (AREA)
EP04028421A 2004-12-01 2004-12-01 Verfahren zur Erzeugung polyfone Signalen Withdrawn EP1666166A1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP04028421A EP1666166A1 (de) 2004-12-01 2004-12-01 Verfahren zur Erzeugung polyfone Signalen
PCT/EP2005/012169 WO2006058608A1 (en) 2004-12-01 2005-11-14 Polyphonic sound generating method
DE602005020679T DE602005020679D1 (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
JP2007543724A JP2008522227A (ja) 2004-12-01 2005-11-14 多声音を生成する方法
US11/719,721 US20090153221A1 (en) 2004-12-01 2005-11-14 Polyphonic sound generating method
AT05803471T ATE464129T1 (de) 2004-12-01 2005-11-14 Verfahren zur erzeugung eines polyphonen klangs
EP05803471A EP1819454B1 (de) 2004-12-01 2005-11-14 Verfahren zur erzeugung eines polyphonen klangs
KR1020077010313A KR101233004B1 (ko) 2004-12-01 2005-11-14 다성음 발생 방법
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9900705B2 (en) 2014-01-23 2018-02-20 Federal Signal Corporation Tone generation
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
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
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
CN112638549B (zh) * 2018-09-06 2022-07-12 Abb瑞士股份有限公司 用于非侵入测量的换能器
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
EP1316931B1 (de) * 2001-12-01 2005-05-18 Siemens Building Technologies AG Akustischer Alarmgeber für einen Gefahrenmelder

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
ATE464129T1 (de) 2010-04-15
EP1819454A1 (de) 2007-08-22
WO2006058608A1 (en) 2006-06-08
EP1819454B1 (de) 2010-04-14
KR101233004B1 (ko) 2013-02-13
CN101065194A (zh) 2007-10-31
KR20070084021A (ko) 2007-08-24
CN101065194B (zh) 2011-04-06
JP2008522227A (ja) 2008-06-26
DE602005020679D1 (de) 2010-05-27
US20090153221A1 (en) 2009-06-18
HK1109359A1 (en) 2008-06-06

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