Restoring force sensor performance requires appropriate measures based on the specific fault type. Some problems can be repaired on-site, while severely damaged sensors need to be returned to the factory or replaced.
1. Excessive Zero-Point Drift or Unstable Output
Recalibrate the zero point: Under no-load conditions, perform a "zeroing" operation using an instrument or software. For sensors supporting automatic calibration, simply start the built-in calibration program.
Check the Installation Environment: Ensure the sensor mounting surface is flat and bolts are evenly tightened to avoid signal abnormalities caused by off-center loading or pre-stress.
Eliminate Interference Sources: Confirm that the shielded cable is grounded at one end and keep it away from inverters, motors, and other devices with strong electromagnetic interference. If necessary, install a magnetic ring or isolation amplifier.
2. Insulation Degradation Due to Moisture or Contamination
Drying Treatment: If the measured insulation resistance between the bridge circuit and the housing is <500 MΩ (ideally >1 GΩ), the sensor can be dried in a 60–80℃ oven for 12 hours. 1. Clean the surface: Wipe the elastomer and wiring parts with anhydrous alcohol to remove oil, dust, and other contaminants to prevent leakage or signal fluctuations.
3. Software or system configuration abnormalities
Adjust filter parameters: If the reading continues to decline or fluctuate, check and appropriately increase the signal filtering strength to avoid the influence of high-frequency noise.
Verify the scale division setting: Ensure that the scale division in the acquisition system matches the sensor. Setting it too low may cause display instability.
4. Performance recovery after slight overload
If the sensor has been briefly overloaded but has not undergone physical deformation, multiple load/unload cycles (e.g., 20%, 50%, 100% range) can help the elastomer recover its original stress state.
Subsequently perform full-range calibration using a standard force source to adjust the zero point and full-scale output to bring the performance back to the normal range.