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信号调理设备的通用名称，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）。
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.
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).
For general, non-critical use, the following cables are recommended for use with CCLD variants:
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.
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)
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
