measurement
Custom Node-RED node for sensor signal conditioning, scaling, smoothing, and data quality management.
Overview
| Property |
Value |
| Version |
1.0.0 |
| Category |
Instrumentation |
| Inputs |
1 |
| Outputs |
3 (process / dbase / parent) |
| Part of |
EVOLV |
Purpose
The measurement node processes raw sensor signals into calibrated, smoothed measurement values. It provides:
- Linear scaling from raw input range to engineering units
- Signal smoothing with multiple methods (moving average, etc.)
- Simulator mode for testing without physical sensors
- Asset registration for automatic discovery by parent nodes
- Data quality indicators
Configuration
Scaling
| Field |
Description |
i_min |
Raw input minimum |
i_max |
Raw input maximum |
i_offset |
Input offset correction |
o_min |
Scaled output minimum |
o_max |
Scaled output maximum |
Smoothing
| Field |
Description |
smooth_method |
Smoothing algorithm (dropdown) |
count |
Window size for smoothing |
Asset Identification
| Field |
Description |
uuid |
Unique sensor identifier |
supplier |
Sensor manufacturer |
category |
Sensor category |
assetType |
Critical - must match parent node query exactly |
model |
Sensor model |
unit |
Engineering unit |
Other
| Field |
Description |
| Simulator toggle |
Enable/disable simulator mode |
positionVsParent |
Position relative to parent |
positionIcon |
Editor icon |
distance |
Distance from parent |
Critical Integration Notes
assetType matching: The assetType field must exactly match what the parent node queries for. For example:
pumpingStation and monster query for assetType: "flow"- Using
"flow-electromagnetic" will NOT match and the measurement will not register
Async registration: The node exposes an HTTP endpoint at /measurement/asset-reg for asset registration.
Inputs and Outputs
Input (Port 0)
Raw sensor values (analog/digital signals).
Output Port 0 - Process Data
Scaled and smoothed measurement value with quality indicators.
Output Port 1 - InfluxDB Telemetry
Measurement time-series data.
Output Port 2 - Registration
Asset registration messages to parent nodes (pumpingStation, monster, MGC, etc.).
Parent Nodes
Can register with any parent node that accepts measurements:
Dependencies
Technical Requirements
- Node.js >= 18
- Node-RED >= 3.x
Testing