package thermocouple import ( "th7/data/thermocouple" ) const ( J_MAX_C = 1200.0 J_MIN_C = -210.0 J_MAX_UV = 69553.0 J_MIN_UV = -8095.0 ) func j_c_to_uv(c float64) (float64, error) { if c < J_MIN_C || c > J_MAX_C { return 0, thermocouple.ErrC } var c0, c1, c2, c3, c4, c5, c6, c7, c8, E float64 if c < 760.0 { c0 = 0.0 c1 = 5.0381187815e1 c2 = 3.0475836930e-2 c3 = -8.5681065720e-5 c4 = 1.3228195295e-7 c5 = -1.7052958337e-10 c6 = 2.0948090697e-13 c7 = -1.2538395336e-16 c8 = 1.5631725697e-20 } else { // 760.0 - 1200.0 c0 = 2.9645625681e5 c1 = -1.4976127786e3 c2 = 3.1787103924 c3 = -3.1847686701e-3 c4 = 1.5720819004e-6 c5 = -3.0691369056e-10 c6 = 0.0 c7 = 0.0 c8 = 0.0 } E = c0 + c*(c1+c*(c2+c*(c3+c*(c4+c*(c5+c*(c6+c*(c7+c*(c8)))))))) return E, nil } func j_uv_to_c(uv float64) (float64, error) { if uv < J_MIN_UV || uv > J_MAX_UV { return 0, thermocouple.ErrUV } var c0, c1, c2, c3, c4, c5, c6, c7, c8, c9, T float64 if uv < 0.0 { c0 = 0.0 c1 = 3.8436847e-2 c2 = 1.1010485e-6 c3 = 5.2229312e-9 c4 = 7.2060525e-12 c5 = 5.8488586e-15 c6 = 2.7754916e-18 c7 = 7.7075166e-22 c8 = 1.1582665e-25 c9 = 7.3138868e-30 } else if uv < 20613.0 { c0 = 0.0 c1 = 3.86896e-2 c2 = -1.08267e-6 c3 = 4.70205e-11 c4 = -2.12169e-18 c5 = -1.17272e-19 c6 = 5.39280e-24 c7 = -7.98156e-29 c8 = 0.0 c9 = 0.0 } else { c0 = 1.972485e1 c1 = 3.300943e-2 c2 = -3.915159e-7 c3 = 9.855391e-12 c4 = -1.274371e-16 c5 = 7.767022e-22 c6 = 0.0 c7 = 0.0 c8 = 0.0 c9 = 0.0 } T = c0 + uv*(c1+uv*(c2+uv*(c3+uv*(c4+uv*(c5+uv*(c6+uv*(c7+uv*(c8+uv*(c9))))))))) return T, nil }