EP3382691B1 - Dispositif avertisseur - Google Patents
Dispositif avertisseur Download PDFInfo
- Publication number
- EP3382691B1 EP3382691B1 EP18163396.7A EP18163396A EP3382691B1 EP 3382691 B1 EP3382691 B1 EP 3382691B1 EP 18163396 A EP18163396 A EP 18163396A EP 3382691 B1 EP3382691 B1 EP 3382691B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- frequency
- voltage
- diaphragm
- control part
- 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.)
- Active
Links
- 238000009529 body temperature measurement Methods 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 31
- 230000002159 abnormal effect Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
Definitions
- the present invention relates to a horn device.
- a horn device which vibrates a diaphragm at a predetermined vibration frequency by magnetic force of an electromagnet generated by energization, and resonate by a resonator the sound produced by the vibration to produce sound.
- Patent literature 2 discloses an electronic horn and an implementation method thereof. The method includes: detecting one or more of a current operating air pressure, operating temperature and power supply voltage of the electronic horn; calculating a compensation control parameter according to a detection result; performing compensation control on a drive signal of the electronic horn according to the compensation control parameter; and using the drive signal after the compensation control to drive the electronic horn to sound.
- the present invention is accomplished in view of such situation, and aims at providing a horn device which is capable of preventing the produce of abnormal noise.
- One of the embodiments of the present invention is a horn device according to claim 1.
- One of the embodiments of the present invention is the aforementioned horn device, wherein the control part reduces the vibration frequency which vibrates the diaphragm for only a predetermined value according to at least any of the temperature measured by the temperature measurement part and the voltage value measured by the voltage measurement part.
- One of embodiments of the present invention is the aforementioned horn device, wherein the control part reduces the vibration frequency which vibrates the diaphragm for only the predetermined value in at least any of situations when the temperature measured by the temperature measurement part is determined to be within a temperature range of low temperature, and when the voltage value measured by the voltage measurement part is determined to be within a voltage range of high voltage.
- Low temperature is -30°C or below for example.
- High voltage is 15V or above for example.
- the horn device according to one embodiment of the present invention is, for example, a horn device which is mounted on a front side of a vehicle such as an automobile and produces a warning sound.
- Fig. 1 is a drawing showing one example of a schematic structure of a horn device A according to one embodiment of the present invention.
- the horn device A comprises a resonator 1 and a horn body part 2.
- the resonator 1 is mounted on the horn body part 2.
- the resonator 1 resonates the sound produced by the horn body part 2 and produces sound outside.
- Fig. 2 is an external view of the resonator 1 according to one embodiment of the present invention.
- the resonator 1 comprises a sound guide 10.
- the sound guide 10 is spirally shaped.
- the sound guide 10 comprises a wall 11 and a sound outlet 12.
- the wall 11 is an enclosure wall with an approximately U-shaped cross section and a predetermined thickness. On an internal side of the wall 11, a path is formed. The path is formed for the sound produced in the horn body part 2 to pass through. In the central part of the spiral shape in the sound guide 10, a sound inlet (not shown) for the sound produced in the horn body part 2 to get into is arranged.
- the sound outlet 12 is a bugle-shaped opening part arranged on an outlet side of the sound guide 10.
- the sound produced in the horn body part 2 resonates from the sound inlet of the resonator 1 through the sound guide 10 and is amplified to a predetermined sound pressure level. Then, the amplified sound is produced outside from the sound outlet 12 of the resonator 1.
- the horn body part 2 comprises a case 20, a diaphragm 21, a movable iron core 22, a fixed iron core 23, a coil 24, a cover 25, an air vibration chamber (chamber) 26, an airflow path 27 and a control device 28.
- the diaphragm 21, the movable iron core 22, the fixed iron core 23, the coil 24, the cover 25, the air vibration chamber (chamber) 26, the airflow path 27 and the control device 28 are accommodated.
- the diaphragm 21 is arranged to infill the opening part of the case 20.
- the diaphragm 21 is, formed to an approximate disk shape by stamping a thin steel plate for example.
- the movable iron core 22 is fixed in the central part of the diaphragm 21, the movable iron core 22 is fixed.
- the diaphragm 21 is fixed to the resonator 1 by being fastened with a washer W.
- the movable iron core 22 is formed to a cylinder shape by magnetic material. One end of the movable iron core 22 is fixed to the diaphragm, and the other end is disposed facing the fixed iron core 23.
- the shaft center of the movable iron core 22 corresponds with the shaft center of the fixed iron core 23. That is, the movable iron core 22 and the fixed iron core 23 are disposed coaxially with each other.
- the fixed iron core 23 is disposed on the center of the coil 24. That is, the fixed iron core 23 and the coil 24 are formed as an electromagnet. Besides, the fixed iron core 23 is fixed to the case 20.
- the coil 24 is formed by conductive material, and is wound with a predetermined number of turns.
- the coil 24 is electrically connected with the control device 28.
- the cover 25 is fixed to the case 20.
- the periphery section of the cover 25 is fastened to both the periphery section of the case 20 and the periphery section of the diaphragm 21.
- An air vibration chamber 26 is formed between the cover 25 and the diaphragm 21.
- the airflow path 27 is formed between the cover 25 and the washer W.
- the airflow path 27 is configured to let the air from the air vibration chamber 26 pass through, accompanied by the vibration of the diaphragm 21.
- control device 28 By energizing the coil 24, the control device 28 turns the fixed iron core 23 disposed on the center of the coil 24 to an electromagnet and produces magnetic force.
- the control device 28 moves the movable iron core 22 back and forth to vibrate the diaphragm 21. Accordingly, a volume of the ring-shaped air vibration chamber 26, which is formed between the cover 25 and the diaphragm 21, increases or decreases. Accordingly, air flowing is generated in the airflow path 27. In this way, the diaphragm 21 vibrates at a predetermined frequency f out , and the vibration becomes sound and is produced from the airflow path 27.
- the resonance frequency fc is a value determined by the shape of material of the resonator 1. However, the resonance frequency fc varies in accordance with the ambient temperature of the horn device A.
- the control device 28 comprises a temperature measurement part 30, a voltage measurement part 31, a power supply device 32, a driving part 33, a control part 34 and a memory part 35.
- the temperature measurement part 30 measure the ambient the temperature T of the horn device A.
- the temperature measurement part 30 is arranged inside the control device 28. Then, the temperature measurement part 30 measures the temperature T inside the control device 28. The temperature measurement part 30 outputs the measured temperature T to the control part 34.
- the voltage measurement part 31 measures the voltage value Vb which is used to vibrate the diaphragm 21.
- the voltage measurement part 31 measures the voltage value Vb output from the power supply device 32.
- the voltage value Vb may also be the voltage applied to the coil 24.
- the voltage measurement part 31 outputs the measured voltage Vb to the control part 34.
- the power supply device 32 supplies power to each part of the control device 28.
- the power supply device 32 is a battery.
- secondary batteries such as a nickel-hydrogen battery or a lithium-ion battery can be used as the power supply device 32.
- an electric double layer capacitor (condenser) can also be used.
- the driving part 33 Based on a PWM (Pulse Width Modulation) signal output from the control part 34, the driving part 33 converts the direct-current power from the power supply device 32 to an alternating-current power, and outputs the converted alternating-current power to the coil 24. In this way, the coil 24 is energized.
- PWM Pulse Width Modulation
- the control part 34 By outputting the PWM signal to the driving part 33, the control part 34 energizes the coil 24 and vibrates the diaphragm 21 at a predetermined frequency. In this case, the control part 34 changes the frequency which vibrates the diaphragm 21 according to the temperature T measured in the temperature measurement part 30.
- the frequency at which the diaphragm 21 vibrates (referred to as “vibration frequency” hereinafter) is the frequency f out of the PWM signal.
- a characteristic of the control part 34 is that when the temperature T measured by the temperature measurement part 30 is within the temperature range of low temperature, the control part 34 deviates the vibration frequency which vibrates the diaphragm 21 from the resonance frequency fc at which the amplitude of the diaphragm 21 is the greatest.
- the control part 34 sets the frequency f out to the frequency f 0 which is the initial value of the frequency of PWM signals.
- the frequency f 0 is the resonance frequency fc in the normal temperature range.
- the control part 34 sets the frequency f out to a value (f 0 -fx) obtained by subtracting a predetermined frequency fx from the frequency f 0 .
- the control part 34 inhibits the amplitude of the diaphragm 21 by deviating the vibration frequency from the resonance frequency fc. Accordingly, the control part 34 can prevent the collision of the movable iron core 22 and the fixed iron core 23, and can prevent the production of abnormal noise.
- control part 34 changes the frequency which vibrates the diaphragm 21 according to the voltage value Vb measured by the voltage measurement part 31.
- a characteristic of the control part 34 is that when the voltage value Vb measured by the voltage measurement part 31 is within a voltage range of high voltage, the control part 34 deviates the vibration frequency which vibrates the diaphragm 21 from the resonance frequency fc.
- the control part 34 sets the frequency f out to the frequency f 0 which is the initial value of the frequency of PWM signals.
- the control part 34 sets the frequency f out to a value (f 0 -fx) obtained by subtracting the predetermined frequency fx from the frequency f 0 .
- the control part 34 inhibits the amplitude of the diaphragm 21 by deviating the vibration frequency from the resonance frequency fc. Accordingly, the control part 34 can prevent the collision of the movable iron core 22 and the fixed iron core 23, and can prevent the production of abnormal noise. Moreover, when the current value flowing through the coil 24 increases because the ambient temperature (for example, the temperature T) of the horn device A becomes a low temperature, the control part 34 may also prevent the amplitude of the diaphragm 21 be deviating the vibration frequency from the resonance frequency fc.
- the control part 34 sets the frequency f out to the frequency f 0 which is the initial value. Besides, the control part 34 sets the duty ratio D out to the duty ratio D 0 which is the initial value (step S101).
- the control part 34 when a warning signal is obtained from outside, the control part 34 generates PWM signals of the set frequency f out and duty ratio D out , and outputs the generated PWM signals to the driving part 33. In this way, the control part 34 energizes the coil 24 and vibrates the diaphragm 21 at the frequency f 0 , by which sound is produced from the sound outlet 12 of the resonator 1 to outside.
- the control part 34 obtains the temperature T from the temperature measurement part 30 (step S102).
- the control part 34 determines whether the obtained temperature T is within the temperature range of low temperature (step S103). For example, when the obtained temperature T is determined to be lower than the first temperature threshold T th1 , the control part 34 determines that the obtained temperature T is within the temperature range of low temperature. On the other hand, when the obtained temperature T is determined to be higher than the first the temperature threshold T th1 , the control part 34 determines that the temperature T is not within the temperature range of low temperature.
- the first the temperature threshold T th1 is set according to the temperature of the coil 24 when the current value, which is capable of producing the attraction force that collides the fixed iron core with the movable iron core when PWM signals are output to the coil 24, flows through the coil 24.
- control part 34 obtains the voltage value Vb from the voltage measurement part 31 (step S104).
- the control part 34 determines whether the obtained voltage value Vb from the voltage measurement part 31 is within the voltage range of high voltage (step S105). For example, when the obtained voltage value Vb is determined to be higher than the second voltage threshold V th2 , the control part 34 determines that the obtained voltage value Vb is within the voltage range of high voltage. On the other hand, when the obtained voltage value Vb is lower than the second voltage threshold V th2 , the control part 34 determines that the voltage value Vb is not within the voltage range of high voltage.
- the second voltage threshold V th2 is set according to the voltage applied to the coil 24 or the output voltage of the power supply device 32 when the current value, which is capable of producing the attraction force that collides the fixed iron core with the movable iron core in the electromagnet, flows through the coil 24.
- the control part 34 sets the frequency f out which is approximately equal to the resonance frequency fc to the frequency f 0 (step S106).
- the control part 34 sets the frequency f out to the value (f 0 -fx) obtained by subtracting the predetermined frequency fx from the frequency f 0 (step S107). Accordingly, when the voltage value Vb is determined to be within the voltage range of high voltage, the control part 34 can inhibit the amplitude of the diaphragm 21 by deviating the vibration frequency from the resonance frequency fc and prevent abnormal noise.
- the resonance frequency fc becomes high.
- step S108 when the obtained temperature T is determined to be within the temperature range of low temperature, the control part 34 sets the frequency f out to the value (f 0 -fx) obtained by subtracting the predetermined frequency fx from the frequency f 0 (step S108). Accordingly, when the temperature T is determined to be within the temperature range of low temperature, the control part 34 can inhibit the amplitude of the diaphragm 21 and prevent abnormal noise by deviating the vibration frequency from the resonance frequency fc. In addition, when the frequency property of the diaphragm 21 at room temperature shown in Fig. 6(a) is compared with the frequency property of the diaphragm 21 at low temperature shown Fig. 6(b) , the resonance frequency fc at low temperature is higher than the resonance frequency fc at room temperature.
- the horn device A is characterized in deviating the vibration frequency which vibrates the diaphragm 21 from the resonance frequency fc according to at least any of the temperature T measured by the temperature measurement part 30 and the voltage value Vb measured by the voltage measurement part 31. Accordingly, the horn device A can prevent the production of abnormal noise caused by the collision of the fixed iron core 23 and the movable iron core 22 due to the increase of attraction force of the electromagnet.
- the control part 34 of the horn device A reduces the vibration frequency (f out ) which vibrates the diaphragm 21 for only a predetermined value fx.
- the control part 34 of the aforementioned embodiment may also be realized by a computer.
- a program used to realize the function may be recorded in a computer-readable recording medium, and the function may be realized by making a computer system read in the program recorded in the recording medium and implementing the program.
- the "computer system” mentioned here includes a hardware such as OS or peripheral device.
- the "computer-readable recording medium” is a memory device such as a movable medium like a flexible disk, a magnetic optical disk, a ROM and a CD-ROM, and a built-in hard disk in the computer system.
- computer-readable recording medium means a recording medium which dynamically keeps programs for a short time like a communication wire that transmits programs via a network such as the Internet or via a communication line such as a telephone line, including a recording medium which keeps programs for a specific time like a volatile memory within the computer system which becomes a server or client in this situation.
- the programs may be programs which are used to realize a part of the functions, may be programs realized by a further combination with programs which already record the functions in the computer system, or may be programs which are realized by using programmable logic arrays such as a FPGA (Field Programmable Gate Array).
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Reciprocating Pumps (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Claims (2)
- Un dispositif avertisseur (A), qui est configuré pour faire résonner, par un résonateur (1), un son produit par la vibration d'un diaphragme (21), comprenant :une partie de commande (34) configurée pour faire vibrer le diaphragme ;une partie de mesure de température (30) configurée pour mesurer une température à l'intérieur du dispositif avertisseur (A) ; etune partie de mesure de tension (31) configurée pour mesurer une valeur de tension utilisée pour faire vibrer le diaphragme (21) ;caractérisé en ce que la partie de commande (34) est configurée pour définir une valeur prédéterminée fx comme valeur de soustraction et faire vibrer le diaphragme (21) à une fréquence qui est obtenue en soustrayant la valeur prédéterminée fx d'une fréquence de résonance prédéterminée fc en fonction de la température mesurée par la partie de mesure de température (30) et/ou de la valeur de tension mesurée par la partie de mesure de tension (31),dans lequel la partie de commande (34) est configurée pour régler la fréquence de vibration qui fait vibrer le diaphragme (21) par une fréquence fout d'un signal PWM, dans lequellorsque la température T mesurée par la partie de mesure de température (30) est dans la plage de température normale allant d'un premier seuil de température Tth1 à un second seuil de température Tth2, la partie de commande (34) règle la fréquence fout du signal PWM à une valeur initiale de la fréquence f0, qui est la fréquence de résonance prédéterminée fc dans la plage de température normale, etlorsque la valeur de tension Vb mesurée par la partie de mesure de tension (31) est dans une plage de tension normale allant d'un premier seuil de tension Vth1 à un second seuil de tension Vth2, la partie de commande (34) règle la fréquence fout du signal PWM à la valeur initiale de la fréquence f0, qui est la fréquence de résonance prédéterminée fc dans la plage de température normale.
- Le dispositif avertisseur (A) selon la revendication 1, dans lequel la partie de commande (34) est configurée pour réduire la fréquence de vibration qui fait vibrer le diaphragme (21) pour seulement la valeur prédéterminée fx dans une situation où la température mesurée par la partie de mesure de température (30) est déterminée comme étant inférieure au premier seuil de température Tth1, et/ou où la valeur de tension mesurée par la partie de mesure de tension (31) est déterminée comme étant supérieure au second seuil de tension Vth2.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017068289 | 2017-03-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3382691A1 EP3382691A1 (fr) | 2018-10-03 |
EP3382691B1 true EP3382691B1 (fr) | 2021-05-26 |
Family
ID=61763795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18163396.7A Active EP3382691B1 (fr) | 2017-03-30 | 2018-03-22 | Dispositif avertisseur |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3382691B1 (fr) |
JP (1) | JP2018173637A (fr) |
CN (1) | CN108696802B (fr) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55106497A (en) * | 1979-02-08 | 1980-08-15 | Ibuki Kogyo Kk | Temperature compensation type electric horn |
JPH066899A (ja) * | 1992-06-20 | 1994-01-14 | Star Micronics Co Ltd | 電気音響変換器の音圧特性の温度補償方法 |
AUPO224596A0 (en) * | 1996-09-11 | 1996-10-03 | Robert Bosch Gmbh | A siren control system |
CN1825429A (zh) * | 2005-12-30 | 2006-08-30 | 哈尔滨工业大学固泰电子有限责任公司 | 一种自适应智能电子喇叭 |
CN103500574B (zh) * | 2012-08-16 | 2017-06-27 | 万喻 | 一种智能电子喇叭及其实现方法 |
JP6478910B2 (ja) * | 2013-07-25 | 2019-03-06 | 株式会社 Trigence Semiconductor | スピーカ制御装置 |
JP6314496B2 (ja) * | 2014-01-21 | 2018-04-25 | 浜名湖電装株式会社 | 警報音発生装置 |
CN105050018B (zh) * | 2015-05-08 | 2019-01-29 | 浙江中科电声研发中心 | 扬声器部件谐振频率测量方法及系统 |
JP2017009624A (ja) | 2015-06-16 | 2017-01-12 | 株式会社ミツバ | ホーン装置 |
-
2018
- 2018-03-22 EP EP18163396.7A patent/EP3382691B1/fr active Active
- 2018-03-22 CN CN201810242892.4A patent/CN108696802B/zh not_active Expired - Fee Related
- 2018-03-29 JP JP2018064739A patent/JP2018173637A/ja active Pending
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP3382691A1 (fr) | 2018-10-03 |
CN108696802A (zh) | 2018-10-23 |
CN108696802B (zh) | 2021-02-19 |
JP2018173637A (ja) | 2018-11-08 |
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