Rope-traction T1/T2 ratio

Extraits de code

curl "https://api.oanor.com/elevator-api/v1/traction-ratio" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/elevator-api/v1/traction-ratio", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/elevator-api/v1/traction-ratio");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/elevator-api/v1/traction-ratio",
    headers={"x-oanor-key": "oanor_test_..."}
)

Exemple de réponse

Une réponse réelle de ce endpoint, capturée lors du dernier contrôle de santé.

{
    "data": {
        "note": "Traction elevators move the ropes by friction over the sheave, so the heavier side cannot out-pull the grip: the available traction (e^(μθ), the capstan equation) must exceed the T1/T2 tension ratio in both worst cases — a full car at the bottom (car side heaviest) and an empty car at the top (counterweight side heaviest). The governing ratio is the larger; keep the sheave groove friction and wrap angle above it, or the ropes slip.",
        "inputs": {
            "car_weight_kg": 1000,
            "rated_load_kg": 1000,
            "counterweight_kg": 1450
        },
        "governing_ratio": 1.45,
        "ratio_empty_car": 1.45,
        "ratio_full_load": 1.379
    },
    "meta": {
        "timestamp": "2026-06-07T08:17:57.919Z",
        "request_id": "1e9d4fc5-b7ad-4b33-854e-e65102acbc0c"
    },
    "status": "ok",
    "message": "Traction ratio",
    "success": true
}