Signal conditioning
RELIABLE PEAK FORCE AND STRAIN MONITORING IN CYCLIC MACHINE PROCESSES
P Figure 3. Switching noise without the LC (234µV) vs. with LC (15µV).
CB Piezotronics (PCB) has announced the release of Model 410D01, a single-channel DIN rail mount ICP signal conditioner designed for cyclic force and strain measurement in industrial and OEM machinery applications. The module powers ICP sensors, conditions dynamic signals, and delivers analogue voltage outputs for integration with PLC and control systems. Model 410D01 is engineered for repetitive processes where peak capture and reset functions confirm successful machine operations. By converting fast transient signals into stable waveform and peak outputs, the unit enables real- time process monitoring using standard PLC or PC input channels. The updated design incorporates a zero clamp analogue output, lower broadband electrical noise, and an expanded operating temperature range to support reliable performance in automation environments.
The noise measurement comparison is shown in Figure 3. At 2MHz switching frequency, the output switching ripple was 234µV without the LC and is greatly reduced to 15µV after adding a 0603 ferrite bead. The addition of the second-order LC filter to minimise noise maintains the control loop bandwidth at 100kHz and fast transient response with recovery below 10µs, which is confirmed through bench evaluation with and without the LC filter. Recovering within 10µs allows a negligible blanking time, which is desired in wireless and RF applications. ADI’s LTM4702 resolves the system designer’s challenge of low signal processing efficiency caused by the load transient blanking period.
The load transient waveform shown in Figure 4 verifies fast transient response and recovery within 10µs after adding the second-order LC filter, similar to the behaviour of the design example without this filter.
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Figure 4. Load transient results: without LC vs. with LC (recover within 10µs). CONCLUSION
Supporting high current applications with minimal noise while ensuring high efficiency and stability can be challenging. Adding a second-order LC filter can significantly reduce noise but may cause instability if not optimised correctly. To minimise noise without compromising stability, use an optimised second-order LC filter. By carefully selecting the required L and C components based on the switching frequency, control loop bandwidth, and resonant frequency, one can minimise the switching noise while maintaining a fast transient response and high bandwidth.
Analog Devices
www.analog.com
The module provides three analogue outputs: waveform, peak track hold, and zero clamp. Software-selectable features include gain, polarity, coupling type, programmable reset delay, and a built-in waveform viewer for setup verification. Configuration is completed via USB using PCB’s free SignalCapture software.
Typical applications include metal forming process control such as crimping, stamping, and pressing operations. Additional uses include monitoring electrodynamic and hydraulic systems, robotics gripper feedback, elevator testing, and dynamic impulse testing.
PCB Piezotronics
www.pcb.com August 2026 Instrumentation Monthly
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