CCLD/IEPE 加速度计

CCLD加速度计是带有集成前置放大器的PE电荷加速度计（也称为IEPE加速度计），具有低阻抗电压输出形式的输出信号。大多数Brüel & Kjær CCLD加速度计都是密封的，以防止环境污染，由于内置放大器，它们对射频、电磁辐射的敏感性较低，以及低阻抗输出。这使得加速度计可以匹配廉价且长的同轴电缆。

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CCLD加速度计是带有集成前置放大器的PE电荷加速度计（也称为IEPE加速度计），具有低阻抗电压输出形式的输出信号。大多数Brüel & Kjær CCLD加速度计都是密封的，以防止环境污染，由于内置放大器，它们对射频、电磁辐射的敏感性较低，以及低阻抗输出。这使得加速度计可以匹配廉价且长的同轴电缆。它们只在一个方向上测量。

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三轴

CCLD加速度计是带有集成前置放大器的PE电荷加速度计（也称为IEPE加速度计），具有低阻抗电压输出形式的输出信号。大多数 HBK CCLD加速度计都是密封的，以防止环境污染，由于内置放大器，它们对射频、电磁辐射的敏感性较低，以及低阻抗输出。这使得加速度计可以匹配廉价且长的同轴电缆。它们可以测量所有三个方向。

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什么是CCLD加速度计？

CCLD是标识加速度计（也称为IEPE加速度计）和CCLD信号调节设备的通用名称，它们在恒流源供电下运行，并在供电线上以电压调制的形式输出信号。

CCLD传感器具有使用厚膜技术制造的内置低噪声前置放大器。前置放大器由ASIC（专用集成电路）组成，其中包括一个特殊的参考电压，可确保在整个工作温度范围内提供非常稳定的偏置电压。

使用CCLD设备的一个明显优势是它允许您使用廉价的电缆。

低输出阻抗使得用长电缆连接加速度计和数据采集硬件成为可能，例如输入数据采集模块（LAN-XI 3050型）。

Piezoelectric CCLD / IEPE Accelerometers

CCLD accelerometers are PE charge accelerometers (also refereed to as IEPE accelerometers) with integral preamplifiers that have output signals in the form of low impedance voltage output. Most Brüel & Kjær CCCLD accelerometers are hermetically sealed to protect against environmental contamination, they have low susceptibility to radio frequency, electromagnetic radiation and low a impedance output due to the built-in amplifier. This allows the use of inexpensive, and long, coaxial cables.

What are CCLD Accelerometers?

CCLD is a generic name identifying accelerometers (and is also refereed to as IEPE accelerometers) and CCLD Signal conditioning equipment that operate on a constant-current power supply and give output signals in the form of voltage modulation on the power supply line.

CCLD variants have built-in, low-noise preamplifiers that are made using thick-film technology. The preamplifiers comprise ASICs (application-specific integrated circuit) including a special reference voltage that ensures very stable bias voltage over the entire operating temperature range.

An obvious advantage of using CCLD equipment is that it allows you to use inexpensive cables.

The low-output impedance allows the use of long cables for connection between the accelerometer and the data acquisition hardware, ie. our Input DAQ Module (LAN-XI Type 3050).

Cables and Connectors for CCLD

For general, non-critical use, the following cables are recommended for use with CCLD variants:

Single-screened Accelerometer Cable (AO-0463)
Flexible cable with coaxial connectors (male, 10 – 32 UNF), – 20, max. temperature: +80 °C (– 4 to +176 °F)
Coaxial Accelerometer Cable (AO-0531)
Flexible cable with coaxial connectors (male, 10 – 32 UNF) to BNC (male) connectors, max. temperature: –20 to +80 °C (– 4 to +176 °F)
Low-Noise Accelerometer Cable (AO-1382)
Double-screened cable with coaxial connectors (male, 10– 32 UNF), max. temperature: 250 °C (482 °F)

In order to distinguish individual accelerometers in a multichannel measurement setup, numbered cable markers (UA-1243) are available to fit cables that are 1.6 mm in diameter and coloured cable markers (UA-1244) are available to fit cables that are 1.9 to 2.2 mm in diameter.

Maximum Cable Length for CCLD

The maximum output voltage of a CCLD accelerometer when driving long cables depends on the supply current at which it is operating, and on the capacitive load due to the connecting cable.

The maximum cable length in metres (for distortion ≤1%) is given by:

L = 140000 x ls – 1 f x VoxCm

where:

Is = supply current (mA)

f = frequency (kHz)

Vo = output voltage (Vpeak)

Cm = cable capacitance (pF/m)

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CCLD/IEPE 加速度计

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Piezoelectric CCLD / IEPE Accelerometers

What are CCLD Accelerometers?

Cables and Connectors for CCLD

Maximum Cable Length for CCLD

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