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壓電式加速度傳感器，又稱振動(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)象稱為“壓電效應(yīng)"，具有“壓電效應(yīng)"的晶體稱為壓電晶體。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3224C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)，靈敏度0.6 pC/g，工作溫度高達(dá)177℃。
The Dytran 3224C is an ultra miniature, low profile piezoelectric charge mode accelerometer with a sensitivity of 0.6 pC/g designed to adhesively mount in spaces inaccessible to other types of accelerometers. The sensor features an overall height of just 0.10 inches (2.6 millimeters) and an overall weight of just 0.2 grams.
Designed to reliably operate in high temperatures up to +350°F (+177°C), the Dytran model 3224C incorporates a ceramic shear sensing element packaged in a lightweight laser welded titanium housing, with a three foot integral cable terminating to a 10-32 jack. The cable is designed to mate with several Dytran extension cables.
Due to its small size and lightweight, the model 3224C is ideal for the measurement of shock and vibration of very small objects such as printed circuit boards ad board-mounted components.
特性
1. 0.6 pC/g sensitivity
2. 10,000 Hz upper frequency range (±5%)
3. 3-foot integral cable
4. Adhesive mount
5. 0.2 grams
6. Titanium
7. Ultra miniature teardrop design
8. +350° (+177°C) operation
9. Charge mode
應(yīng)用
1. Environmental Stress Screening (ESS)
環(huán)境應(yīng)力篩選
2. Mechanical shock
機(jī)械沖擊
3. PC board vibration measurements
印刷電路板振動(dòng)檢測(cè)
4. Product response testing
產(chǎn)品響應(yīng)試驗(yàn)
5. General purpose vibration measurements where space is at a premium
振動(dòng)監(jiān)測(cè)
Weight, Less Cable 0.007 oz 0.2 grams
Size Width 0.138 in 3.5 mm [2] 10-32 Coaxial Jack at end of 3FT.cable
Length 0.267 in 6.8 mm [3] Measured at 100 Hz, 1 G rms per ISA RP 37.2.
Height 0.188 in 4.8 mm
Sensitivity [3] [4] 0.25 TO 0.45 pC/g .025 TO .046 pC / m/s2
Range F.S. 250 g 2453 m/s2
Frequency Response, ±5% [4] [5] to 10000 Hz to 10000 Hz
Resonant Frequency >40 kHz >40 kHz
Transverse Sensitivity, Max. 5 % 5 %
Strain Sensitivity @250με 0.0005 g/με 0.005 m/s2 /με
Maximum Vibration 250 g rms 2450 m/s2 rms
Maximum Shock 1000 g pk 9800 ± m/s2 pk
Temperature Range -60 to +350 °F -51 to 177 °C
Seal Laser Weld, Epoxy Sealed Cable Laser Weld, Epoxy Sealed Cable
ELECTRICAL
Capacitance 220 pF 220 pF
Insulation Resistance @ Room Temp. 5 x 108 Min. OHMS 5 x 108 Min. OHMS
訂貨型號(hào)
3224C
配件
1. Model 6298 small petro mounting wax, (1) model 6725 installation removal tool
2. Model 4110C current source power unit, 4705M series in-line charge amplifier (10-32 jack to BNC jack), 4751B series in-line charge amplifier (10-32 jack to 10-32 jack)
3. 電纜：6013A, 6019A
相關(guān)型號(hào)
3224A1 微型
3224A2 微型
3224A3 微型
3224A4 微型
3224A5 微型
3224A6 微型
3224B 微型
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