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參數(shù)資料
| 型號： | KBS-30DB-1A-20 |
| 廠商： | AVX Corporation |
| 文件頁數(shù)： | 17/22頁 |
| 文件大?。?/td> | 0K |
| 描述： | BUZZER PIEZO 1KHZ 30MM |
| 標(biāo)準(zhǔn)包裝： | 120 |
| 系列： | KBS, Kyocera |
| 驅(qū)動器電路： | 傳感器，外部驅(qū)動 |
| 技術(shù)： | 壓電 |
| 輸入類型： | 峰值-峰值信號 |
| 電壓 - 額定： | 20Vp-p |
| 頻率： | 1kHz ~ 1.5kHz |
| 工作模式： | 振鈴器 |
| 聲壓級： | 70dB @ 20V，30cm |
| 可清洗： | 無 |
| 安裝類型： | 底座安裝 |
| 端子： | 導(dǎo)線引線 |
| 尺寸/尺寸： | 圓形 - 39.00mm 直徑 x 13.00mm H |
| 包裝： | 散裝 |
| 電容 @ 頻率： | 48000pF @ 120Hz |
3
Piezoelectric Acoustic Generators
Mounting
The various mounting methods for piezoelectric acoustic
elements are discussed below:
Simple Mounting Method
The simplest method is to stick the piezo acoustic element
to the plate using double-sided adhesive tape. However, the
sound pressure will not be optimum.
Circumference Fixing Method
This method is to fix the outside circumference of the
element to the supporting ring of the plate. Considerable sound
pressure can be obtained covering a wide frequency range
around the resonant frequency.
Nodal Mounting Method
This method is to fix the nodal diameter of the element to
the supporting ring of the plate. Loud sound pressure can be
obtained at the resonant frequency. The sound pressure will
drastically drop when the frequency is shifted from the
resonant frequency.
Designing the Fixture
Factors affecting the sound pressure of the piezoelectric
acoustic element are as follows:
1) resonance frequency of the element
2) cavity resonance (cavity design of the case/casing
method)
3) resonance of sound body (mass after casing)
Maximum sound pressure level can be achieved at the
point where the 3 factors overlap. Taking the oscillation
frequency fluctuation into consideration, the fixture is designed
so that peak points are slightly overlapping with one another.
Case Design for Circumference Mounting Method
When designing a case for circumference mounting, the
cavity resonant frequency of the case (fo) is determined by the
following formula:
For example, when KBS-35DA-3A (resonant frequency
fr=2.9
± 0.5 kHz) is mounted in a case where the size is:
D=33.5mm, d=5.5mm,T=2mm, t=1mm, the formula for f
0
is
explained as follows:
Then, the cavity resonant frequency shall be 2,807 Hz.
PIEZOELECTRIC ELEMENT
BAKELITE OR ACRYL RESIN PLATE
SUPPORTING RINGMMMMMMMMMMMMMM
2π
CS
f0
V(t+1.5
)
π
S
(Hz)
where:
V:
cavity volume (m3)
S:
area of open hole
(m2)
t:
Length of open hole
(m)
C:
sound velocity
C=344 m/sec
V
πD2T
4
S
πd2
4
figure 5
figure 6
figure 8
figure 7
PIEZOELECTRIC ELEMENT
BAKELITE OR ACRYL RESIN PLATE
PIEZOELECTRIC ELEMENT
SUPPORTING RING
BAKELITE OR
ACRYL RESIN PLATE
D
d
S
T
t
figure 9
2πD
Cd
1
f0
T(t+0.75d)
The adhesive agent used between the element and the
support ring should be elastic, such as silicon rubber.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KBS3-175-1 | 制造商:3M Electronic Products Division 功能描述:SPLIT SLEEVE VAULT & RISER CLOSURE KIT |
| KBS-35DA-3A | 功能描述:音頻指示器及警報器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級:85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
| KBS-35DA-3FCS | 功能描述:音頻指示器及警報器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級:85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
| KBS-35DA-3G | 功能描述:音頻指示器及警報器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級:85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
| KBS-40DA-2GCS-3 | 功能描述:音頻指示器及警報器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級:85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
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