AiVibeSignal Conditioning
Signal conditioning is the processing of an analogue sensor signal, by amplification, filtering, isolation, excitation, linearisation or conversion, to make it suitable for accurate measurement by a data acquisition system or controller input.
Many sensors produce signals that cannot be measured accurately without preparation. Thermocouples generate millivolt signals that need amplification and cold-junction compensation, strain gauges and RTDs need excitation current or voltage, and piezoelectric accelerometers need charge amplifiers or constant-current power. Filters remove noise and limit bandwidth before digitisation, and linearisation corrects non-linear sensor responses.
Isolation separates sensor circuits from measurement electronics, protecting equipment and personnel from high common-mode voltages and breaking ground loops that cause measurement errors. Signal conditioners and transmitters in industrial plants commonly convert sensor outputs into standard signals such as 4–20 mA, which travel reliably over long cables to PLC and DCS inputs. Modern DAQ modules and smart sensors often integrate conditioning with the converter.
Conditioning choices affect accuracy, noise and response time, and each stage contributes its own errors, so the complete measurement chain should be specified and calibrated together. Filters introduce phase delay that matters in control loops and high-frequency analysis. In hazardous areas, isolators and barriers must be certified for the protection concept used, and installation should follow manufacturer documentation and be carried out by qualified personnel.
Key points
- Prepares raw sensor signals for accurate digitisation
- Includes amplification, filtering, excitation and linearisation
- Isolation breaks ground loops and protects equipment
- Transmitters convert sensor outputs to standard 4–20 mA signals
- The whole measurement chain should be specified and calibrated
Where AiVibe comes in
AiAmbA IoT is AiVibe's edge protocol layer: it discovers devices and normalises industrial signals, with supported protocols including Siemens S7, Mitsubishi MC, Delta Modbus, OPC UA and MQTT, and driver availability confirmed per installation. Writes to machines are deny-by-default.
Related terms
- Data Acquisition (DAQ)Industrial IoT & Edge
- Analogue-to-Digital Converter (ADC)Industrial IoT & Edge
- ThermocoupleIndustrial IoT & Edge
- Resistance Temperature Detector (RTD)Industrial IoT & Edge
- Vibration Sensor (Accelerometer)Industrial IoT & Edge