Piezoelectric acceleration sensor core

The core of the Xiyuan electronic sensor in Yangzhou adopts a triangular shear structure. The piezoelectric ceramic wafer is located between the central column and the peripheral mass block in a triangular shape. When the sensor is subjected to vibration, the inertial force of the mass block will cause shear deformation of the ceramic wafer, thereby generating charges. This structure enables the sensor to have greater rigidity, a wider frequency response, and the ability to withstand certain overloads and impacts.

Interpretation of Core Concepts

Piezoelectric: Its working principle is based on the piezoelectric effect.

Acceleration sensor: measures the acceleration of an object's motion (unit: m/s ⊃2; or g, 1g=9.8m/s ⊃2;). Through the integration circuit, acceleration can be converted into velocity and displacement.

Core: This is the "heart" or sensitive component of the sensor, excluding the housing, cables, subsequent amplification circuits, and other parts. Usually composed of piezoelectric crystals and mass blocks.

Passive: The sensor core itself does not require an external power source to operate. It generates signals on its own and is an energy converter, not a consumer.

Positive piezoelectric effect: This is the physical principle of its operation, which refers to the phenomenon where certain dielectrics (piezoelectric materials) generate charges on their surfaces when subjected to mechanical stress (pressure or deformation).

Charge output: The direct output of the sensor core is a small amount of charge proportional to acceleration, rather than voltage. This is a high impedance signal.

Working principle

Structure: The core is mainly composed of three parts:

1. Piezoelectric components: Common materials include natural quartz crystals or piezoelectric ceramics (such as PZT), which have piezoelectric properties.

2. Mass block: a block with a certain mass.

3. Base: used for fixing and installation.

Working process:

1. When the sensor vibrates or is impacted along with the measured object, due to the law of inertia, the mass will apply an alternating force (F=m * a) to the piezoelectric element.

2. This alternating force causes the piezoelectric element to undergo compression or tensile deformation, resulting in mechanical stress.

3. According to the positive piezoelectric effect, alternating charges of equal magnitude and opposite polarity are generated on the two surfaces of a piezoelectric element.

4. The amount of charge (Q) is proportional to the force (F) applied, which in turn is proportional to the acceleration (a) (F=m * a, with a fixed mass m).

Therefore, the final output charge (Q) is proportional to the acceleration (a), which is the basis for measuring acceleration.

Main Features

1. Wide frequency range: The natural frequency is very high, usually able to measure high-frequency vibrations from 1 to 15000Hz, which is very suitable for capturing impact and vibration events.

2. Wide dynamic range: It can measure very weak vibrations and withstand extremely high impact accelerations.

3. Small size and light weight: It has little impact on the measured object and is suitable for measuring the vibration of small or lightweight structures.

4. Passive: Due to the absence of electronic components inside, the core itself can operate in an environment of -40 ℃ to+120 ℃.

5. Good long-term stability: Piezoelectric materials have stable performance and long service life.

Typical application scenarios

With its wide temperature range and versatility, it is widely used in:

Industrial equipment condition monitoring and predictive maintenance: vibration monitoring of rotating machinery such as fans, water pumps, compressors, large motors, gearboxes, and rolling mills.

Vehicle testing: Engine vibration testing for automobiles and construction machinery, road durability testing.

Environmental stress screening: Monitor the vibration of products (such as electronic components and military equipment) on a vibration table in a high and low temperature cycling test chamber.

General scientific research and laboratory testing: university laboratories and research institutions conduct structural dynamics analysis, modal analysis, etc.

This piezoelectric accelerometer core is a sturdy, reliable, and widely applicable industrial grade measurement core. It perfectly balances performance, environmental adaptability, and cost, and is the "main force" in solving most conventional vibration and impact measurement problems.

Yangzhou Xiyuan Electronic Technology Co.,Ltd.

#77 Yeqiao Road, Liandong U Valley slender West Lake Innovation port, building 10-2,Hanjiang District, Yangzhou,Jiangsu,China

Mobie Phone: +86 180-5105-8377

Tel: +86 514-82885589

Whatsapp:+86 182-6066-6867

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Fax: +86 514-82885089