27 lines
1008 B
C#
27 lines
1008 B
C#
using System;
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namespace Footwear_Test_methodsfor_wholeshoe_Slipresistanceperformance.Models
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{
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public sealed record SlipDeviceSnapshot(
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DateTime Timestamp,
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double VerticalLoadN,
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double HorizontalFrictionN,
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double DisplacementMm,
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bool IsTestRunning,
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bool IsResetting,
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bool IsConnected,
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string LastError)
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{
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// 低载荷段（加载/抬升阶段）垂直力很小，H/V 会放大成无意义尖峰（现场曲线冲到 1.4）。
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// GB/T 3903.6 初始压力为 50N，载荷低于该量级时摩擦系数无意义，置零以保证曲线干净。
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public const double MinimumLoadForCoefficientN = 30.0;
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public double FrictionCoefficient => Math.Abs(VerticalLoadN) >= MinimumLoadForCoefficientN
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? HorizontalFrictionN / VerticalLoadN
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: 0;
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public static SlipDeviceSnapshot Offline(string error = "") =>
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new(DateTime.Now, 0, 0, 0, false, false, false, error);
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}
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}
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