Sensor sezgirligi nima?

Sensor sezgirligi — bu elektr chiqishi va mexanik kirish nisbatidir. Akselerometrlar uchun odatda mV/g birligida ifodalanadi (masalan, 100 mV/g). Tezlik sensorlari uchun — mV/(mm/s) yoki mV/(in/s). Yuqori sezgirlik bir xil tebranish darajasida kattaroq chiqish signalini beradi.

To'g'ri sezgirlikni qanday tanlash mumkin?

Yuqori sezgirlik (masalan, 500 mV/g) past darajadagi tebranishlar uchun signal-shovqun nisbatini yaxshilaydi, ammo o'lchanadigan maksimal darajani cheklaydi. Past sezgirlik (masalan, 10 mV/g) yuqori g qiymatlarini o'lchash uchun zarur. Sezgirlikni kutilayotgan tebranish darajalariga va ma'lumotlar yig'ish qurilmasining kirish diapazoniga moslashtiring.

Sensorning dinamik diapazoni nima?

Dynamic range is the ratio between the maximum measurable signal and the noise floor, usually expressed in dB. For IEPE sensors, max output is typically ±5V peak. Dynamic range = 20×log10(Vmax/Vnoise).

IEPE (ICP) sensorlarini quvvatlantirish nima?

IEPE (Integrated Electronics Piezo-Electric) sensorlari odatda 18-30 V DC siljish kuchlanishida 2-20 mA doimiy tok bilan quvvatlantirishni talab qiladi. AC tebranish signali DC siljish ustida joylashadi. ICP — IEPE texnologiyasi uchun PCB Piezotronics savdo markasi.

Sensor chiqishini ma'lumotlar yig'ish qurilmasiga moslash uchun kuchlanish bo'lgichidan foydalana olamanmi?

Ha, ammo bu signal-shovqun nisbatini pasaytiradi. Yaxshiroq yondashuvlar: tegishli sezgirlikka ega sensor tanlang, ma'lumotlar yig'ish qurilmasining kirish diapazonini sozlang yoki dasturiy kuchaytirishga ega signal konditsioneri ishlating.

Bepul muhandislik vositasi — #017

Tebranish sensori sezgirligi kalkulyatori

Sezgirlik va tebranish darajasidan sensor chiqish signal kuchlanishini hisoblang. IEPE akselerometrlar va tezlik sensorlari uchun dinamik diapazon va o'lchanadigan maksimal amplitudani aniqlang.

AccelerometerTezlik SensorimV/g · mV/(mm/s)

Results

Chiqish signal kuchlanishi

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Maksimal o'lchash darajasi

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To'liq shkalaning % sifatida chiqish

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Dynamic Range

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Signal darajasi (dBV)

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Chiqish signal kuchlanishi

Maksimal o'lchanadigan daraja

Keng tarqalgan sensor turlari

Type	Odatiy sezgirlik	Range	Freq Range
Umumiy IEPE akselerometr	100 mV/g	±50 g	0.5–10 kHz
Past chastotali akselerometr	500–1000 mV/g	±5 g	0.1–1 kHz
Shock accel	1–10 mV/g	±500–5000 g	1–20 kHz
Tezlik sensori	4–20 mV/(mm/s)	0.1–100 mm/s	1–1 kHz

Misol — Standart tezlanishölchagich

Given: Sensitivity = 100 mV/g, Vibration = 5 g pk, Max output = 5 V pk

V_out = 100 × 5 / 1000 = 0.500 V peak

Max level = 5000 / 100 = 50 g peak

Output = 0.5 / 5 × 100 = To'liq shkala qiymatining 10%

⚠️ Note: Maksimal chiqish kuchlanishidan oshib ketilganda signal kesiladi va buzilish yuzaga keladi. Kutilayotgan tebranish darajalari doimo sensor o'lchash diapazonida qolishini tekshiring.