Senstrali Triage for conveyor rollers

Senstrali Triage

Contact ultrasound and vibration monitoring of conveyor idler rollers. Each zone graded Healthy, Plan, Watch or Alert against its own baseline, giving your team more confidence in a stop-or-run call.

Triage in brief

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How it works

Sensor nodes clamp magnetically to the stringer and listen to the bearings through the steel, the way a fitter listens with a spanner to the ear. One cable carries power and data to a controller at the end of the section. The controller keeps the raw recordings and sends the results to your server. How it senses.

Nodes on the stringer contact ultrasound, vibration, audio, temperature Master Controller power, control, telemetry LTE-M Your server Australia, or on site Triage list alerts, SMS, trends, playback healthy plan watch alert

Nodes on the stringer

Four measurements per node: contact ultrasound, vibration, audio band and temperature, all picked up through the steel. Steel-to-steel coupling through a magnetic clamp; no drilling, no change to the roller or the frame. Designed to meet IP67.

Controller

One per conveyor section. Powers the nodes, runs the measurements, stores every waveform locally and sends results over LTE-M. No connection to site IT or OT.

Your server

A server in Australia for your site alone, or a machine on your premises. Triage list, trends, playback of any recording, and alerts (SMS and email in pilot).

Four grades, per zone

A zone is the stretch of conveyor one node listens to, identified by its node ID: a single frame or several, depending on configuration. Each zone is graded against its own baseline, so a section that has always been noisy is not flagged for being noisy, only for changing. Plan comes from contact ultrasound alone, the stage of failure most other monitoring methods cannot see.

Tail endOne conveyor section, one node per zoneHead end
Healthy

No signal above its own baseline. No action.

Plan

Contact ultrasound elevated: the first sign of bearing failure, before it can be heard or felt. A scheduling grade: order a roller and put the change into a planned shut. Not urgent.

Watch

Periodic vibration: regular impacts once pitting starts, or shifts that point to roller shell damage or imbalance. A vigilance grade: keep a close eye on it, as it can move to Alert quickly.

Alert

High vibration and sound. This is where idlers usually get flagged today, by sound and heat on the belt walk. Your team gets the trend and the recording; the decision stays with them.

Unknown: node offline, faulted or still baselining. Never shown as Healthy.

Idler bearings give a contact ultrasound warning well before they become audible or hot. By the time they are flagged by sound and heat, the choices left are to stop and miss the production target, or run on and risk the belt. Triage is built to pick up the early signal, so the change can be scheduled for a planned shut.

Continuous

24/7 monitoring of every zone on the section, not a walk every few weeks. Zones are measured between walks, not only on the day of one.

Standalone

Independent of site IT and OT. Own power, own link, own server. No change to the asset, no software on your network.

Modular

Install on a short section to start, then chain sections together. Nodes are added along the same cable.

Long overlands and remote sites

The system is built in independent segments, so a long overland is a staged rollout of the same unit rather than a single large build.

Rendering of sensor nodes on a single cable clamped along a conveyor stringer, under a troughed belt
Illustrative deployment.

Segment size

About 250 m per controller in the current design. A long overland is several segments, added one at a time.

Node spacing

Set from pilot results: from one node per frame to one every two frames or wider, traded against how precisely a failing idler can be located.

Installation

Fitted during a planned shut or a scheduled isolation of the section. No drilling, welding or roller changes. A health check at commissioning confirms each node's coupling to the steel.

Power

For a pilot the controller runs on battery with its own mobile link, so no site power or network is needed. Longer deployments can use solar or site power.

Connectivity

The controller reports over 4G (LTE-M). A satellite link is being evaluated for sites without mobile coverage.

Stringer-mounted

Nodes stay in place when rollers are changed, so monitoring carries on through change-outs.

What exists today, and what is planned

The hardware is built and working on the bench; pilots on operating conveyors are being scheduled. We would rather you knew before a pilot than found out during one.

Multi-node cable on the bench rig, with used conveyor rollers below a Senstrali-branded frame
Multi-node cable on the bench, with rollers from a Pilbara iron ore site.
Inner race bearing defects detected through the frame of a test rig running used rollers from WA bauxite and iron ore mines, with the expected defect frequencies and sidebands in the contact ultrasound, vibration and audio measurementsShown on the rig
Multi-node systems logging on a single cable and reporting over the mobile networkShown on the rig
Nodes, controller, cable, per-client server, dashboard with trends and audio playbackWorking today
Fixed-threshold alerts within the dashboardWorking today
Healthy / Plan / Watch / Alert grading against each zone's own baseline, with rate of changeIn pilot
SMS and email alert delivery, acknowledgement and escalationIn pilot
Automated defect-frequency analysis on flagged zonesIn pilot
Roller-level localisation within a zoneUnder evaluation
Detection on a working conveyor under load at scale, and a false-alarm record. Environmental ratings are not yet testedNot yet proven
Senstrali Forecast: remaining-life estimation from run-to-failure testing and pilot dataIn planning

Specifications

Current design values. Environmental ratings are design targets, not yet tested.

Node
MeasurementsContact ultrasound, vibration, audio band, temperature
CaptureSimultaneous short captures across groups of nodes, or long streaming captures from a single node
Housing16 mm square 316L stainless tube, potted
MountingMagnetic clamp to the stringer; no drilling
EnvironmentalDesigned to meet IP67
Bus
CableOne cable for power and data, each node on its own tap, so a failed node does not break the line
InterfaceRS-485 multi-drop over twisted pair
Data rateLength and site dependent, under evaluation
Segment lengthAbout 250 m per controller
Controller
Backhaul4G (LTE-M); satellite under evaluation
Local storageRaw recordings kept on the controller
Measurement intervalDefault 60 min, adjustable
PowerBattery for pilots; solar or site power for permanent installs
Input voltage12 to 15 V standard, 24 V available
Battery lifeDuty cycle dependent, under evaluation
Data
ReportingGrades, trends and audio playback on a server set up for each client
Raw dataStored on site, downloadable on request
Site systemsNo connection to site IT or OT

Pilot on one section of one conveyor

How a pilot works