Leg-length-discrepancy platform · bidirectional

Measure the balance. Move the platform.

BlinkPose.LLD is the one device that talks back. It's a dual force platform — two motorized foot plates, each on three linear actuators with four load cells — that streams how weight is distributed and where each plate is, and takes motion commands to drive each plate to a target height, roll and pitch. Same JSON shape, same dashboard family as the sensors; it just also moves.

All modules

8 load cells · 6 actuators · 2 plates · bidirectional · real-time

localhost — BlinkPose.LLD

Plate I — the LLD dashboard: eight load cells and six actuators, with the controls that drive both foot plates.

What it measures & moves

Two plates, fully instrumented

Each foot stands on its own tilt/lift plate — sensed by four load cells and moved by three actuators.

Load cells × 8

Four per plate — per-corner weight, so you get true weight distribution under each foot.

Actuators × 6

Three linear actuators per plate, with their raw leg lengths reported live.

Plate pose

Each plate's live height, roll and pitch, solved from the actuator lengths.

Centre of pressure

Per-foot CoP plus a combined centre-of-mass across both plates.

Mass & balance

Total mass per foot and the left/right difference — the core LLD read-out.

Motion commands

Home / zero / stop, set a target height/roll/pitch, run a trajectory, equalize the plates.

Inside the dashboard

Watch it, and drive it

The whole platform is readable and controllable from the browser — measurement and motion on one screen.

Live weight chart. All eight load cells plotted over time — left plate in blue, right in orange.
Per-foot platform cards. A foot diagram with the four corner weights, a centre-of-pressure crosshair, and referent-vs-feedback read-outs for height, roll, pitch and leg lengths.
Nudge controls. Height, pitch and roll arrows drive each plate live (Ctrl-click for a larger step).
Combined centre of mass. Both feet with a live CoM crosshair, plus mass-difference and height-difference tiles.
Modes & trajectories. Manual, equalize-masses or a named trajectory, with Run / Stop.
Home / Park / Stop. Safe motion commands, with a "connected control" guard for moving both plates together.

Why it's different

The only one that moves

The other four modules are output-only sensors. LLD is bidirectional — it streams sensor data and receives motion commands over the same control API, faithfully porting the kinematics of the original balance platform while dropping all the heavy desktop UI.

load cells

actuators

motorized plates

2-way

measure + move