壓電式加速度傳感器，又稱(chēng)振動(dòng)傳感器，是基于壓電晶體的壓電效應(yīng)工作的。某些晶體在一定方向上受力變形時(shí)，其內(nèi)部會(huì)產(chǎn)生極化現(xiàn)象，同時(shí)在它的兩個(gè)表面上產(chǎn)生符號(hào)相反的電荷；當(dāng)外力去除后，又重新恢復(fù)到不帶電狀態(tài)，這種現(xiàn)象稱(chēng)為“壓電效應(yīng)"，具有“壓電效應(yīng)"的晶體稱(chēng)為壓電晶體。常用的壓電晶體有石英、壓電陶瓷等，在現(xiàn)代生產(chǎn)生活中被應(yīng)用于許許多多的方面，如手提電腦的硬盤(pán)抗摔保護(hù)，目前用的數(shù)碼相機(jī)和攝像機(jī)里，也有加速度傳感器，用來(lái)檢測(cè)拍攝時(shí)候的手部的振動(dòng)，并根據(jù)這些振動(dòng)，自動(dòng)調(diào)節(jié)相機(jī)的聚焦。壓電加速度傳感器還應(yīng)用于汽車(chē)安全氣囊、防抱死系統(tǒng)、牽引控制系統(tǒng)等安全性能方面。

美國(guó)Dytran的3220C1是一款高溫型加速度傳感器/振動(dòng)傳感器，具有體積小、結(jié)構(gòu)堅(jiān)固，高密封、耐高溫等特點(diǎn)，鈦合金金屬外殼，工作溫度高達(dá)260℃。

The Dytran model 3220C1 is a low profile piezoelectric charge mode accelerometer with lightweight titanium construction. The distinguishing feature of the model 3220C1 is its unique miniature thru hole mounting configuration, which allows the sensor to be turned a full 360° prior to securing. Electrical connection for the model 3220C1 is achieved via a coaxial glass-to-metal sealed 5-44 connector.

The model 3220C1 is offered with a sensitivity of 10 pC/g and features a ceramic sensing element operating in shear mode. Units also have a low overall weight of just 4.0 grams, making them ideal for applications where mass loading is a concern. Units are hermetically sealed to avoid contamination in high humidity and dirty environments and base isolated to avoid EMI/ground loop interference.

特性

1. 10 pC/g sensitivity

2. 10,000 Hz upper frequency range (±5%)

3. 5-44 radial connector

4. ?.09 thru hole mount

4.0 grams

5. Titanium

6. Hermetic

7. Base isolated

8. +500°F (+260°C) operation

9. 360° cable orientation

10. Miniature design

11. Charge mode

應(yīng)用

1. Environmental Stress Screening (ESS)

環(huán)境應(yīng)力篩選

2. Vibration control

振動(dòng)控制

3. General purpose high temperature vibration monitoring

高溫振動(dòng)監(jiān)測(cè)

Weight 0.09 oz 2.7 grams Notes:

Size Diameter x Height 0.41 x 0.25 Inches 10.4 x 6.4 mm

Sensitivity, ±14% [1] 10 pC/g 1.02 pC/m/s2

Frequency Range, ± 10% [4] to 10000 Hz [4] to 10000 Hz

Resonant Frequency >40 kHz >40 kHz

Maximum Transverse sensitivity 5 % 5 %

Capacitance 1,300 pF 1,300 pF

Resistance, Internal 20 GΩ 20 GΩ

Resistance, Housing to Mounting Surface 20 GΩ 20 GΩ

Coefficient of Thermal Sensitivity 0.06 %/°F 0.11 %/°C

Magnetic Sensitivity 0.0002 @ 100 Gauss g/ Gauss 20 @ 0.01 Gauss ms2/T

Thermal Shock Sensitivity 0.16 g/°F 2.8 m/s2/°C

Base Strain 0.006 g/με 0.06 m/s2/με

ENVIRONMENTAL

Maximum Shock 5000 Gpeak 49050 m/s2 peak

Temperature Range -60 to +500 °F -51 to +260 °C

Seal HERMETIC HERMETIC

訂貨型號(hào)

3220C 高溫型

3220C1 高溫型

配件

1. Model 6165 mounting screw (2-56)

2. Model 4110C current source power unit, 4705A series in-line charge amplifiers (BNC jack to BNC jack), 4751B series in-line charge amplifier (10-32 jack to 10-32 jack)

3. 電纜線：6025A, 6056A

相關(guān)型號(hào)

3220E 微型

3220M7 微型

3220C1 01.png

關(guān)鍵詞：傳感器壓電晶體

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