2.7 KiB
+++ title = "Force Sensors" author = ["Thomas Dehaeze"] draft = false +++
Backlinks:
- [Sensors]({{< relref "sensors" >}})
- [Nanopositioning system with force feedback for high-performance tracking and vibration control]({{< relref "fleming10_nanop_system_with_force_feedb" >}})
- [Collocated Control]({{< relref "collocated_control" >}})
- [Position Sensors]({{< relref "position_sensors" >}})
- [Signal Conditioner]({{< relref "signal_conditioner" >}})
Tags :
Piezoelectric Force Sensors
Dynamics and Noise of a piezoelectric force sensor
An analysis the dynamics and noise of a piezoelectric force sensor is done in (Fleming 2010) ([Notes]({{< relref "fleming10_nanop_system_with_force_feedb" >}})).
Manufacturers
| Manufacturers | Links | Country |
|---|---|---|
| PCB | link | USA |
| HBM | link | Germany |
| Kistler | link | Swiss |
| MMF | link | Germany |
Signal Conditioner
The voltage generated by the piezoelectric material generally needs to be amplified using a [Signal Conditioner]({{< relref "signal_conditioner" >}}).
Either charge amplifiers or voltage amplifiers can be used.
Effect of using multiple Stacks in series of parallels
If two stack are wired in series, the generated charge is kept constant and the capacitance is reduced by a factor 2. Thus, the measured voltage is double while the measured charge is kept constant.
If two stacks are wired in parallel, the capacitance and the number of charge will be doubled. Thus, if a voltage amplifier is used, no change of voltage will be experienced. However, if a charge conditioner is used, the signal will be doubled.
Bibliography
Fleming, A.J. 2010. “Nanopositioning System with Force Feedback for High-Performance Tracking and Vibration Control.” IEEE/ASME Transactions on Mechatronics 15 (3):433–47. https://doi.org/10.1109/tmech.2009.2028422.