93 lines
1.8 KiB
Go
93 lines
1.8 KiB
Go
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package thermocouple
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import (
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"th7/data/thermocouple"
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)
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const (
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E_MAX_C = 1000.0
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E_MIN_C = -200.0 // no polynomials for range -270 to -200
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E_MAX_UV = 76373.0
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E_MIN_UV = -8825.0
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)
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func e_c_to_uv(c float64) (float64, error) {
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if c < E_MIN_C || c > E_MAX_C {
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return 0, thermocouple.ErrC
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}
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var c0, c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12, c13, E float64
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if c < 0.0 {
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c0 = 0.0
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c1 = 5.8665508708e1
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c2 = 4.5410977124e-2
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c3 = -7.7998048686e-4
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c4 = -2.5800160843e-5
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c5 = -5.9452583057e-7
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c6 = -9.3214058667e-9
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c7 = -1.0287605534e-10
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c8 = -8.0370123621e-13
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c9 = -4.3979497391e-15
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c10 = -1.6414776355e-17
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c11 = -3.9673619516e-20
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c12 = -5.5827328721e-23
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c13 = -3.4657842013e-26
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} else {
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c0 = 0.0
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c1 = 5.8665508710e1
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c2 = 4.5032275582e-2
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c3 = 2.8908407212e-5
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c4 = -3.3056896652e-7
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c5 = 6.5024403270e-10
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c6 = -1.9197495504e-13
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c7 = -1.2536600497e-15
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c8 = 2.1489217569e-18
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c9 = -1.4388041782e-21
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c10 = 3.5960899481e-25
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c11 = 0.0
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c12 = 0.0
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c13 = 0.0
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}
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E = c0 + c*(c1+c*(c2+c*(c3+c*(c4+c*(c5+c*(c6+c*(c7+c*(c8+c*(c9+c*(c10+c*(c11+c*(c12+c*(c13)))))))))))))
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return E, nil
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}
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func e_uv_to_c(uv float64) (float64, error) {
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if uv < E_MIN_UV || uv > E_MAX_UV {
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return 0, thermocouple.ErrUV
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}
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var c0, c1, c2, c3, c4, c5, c6, c7, c8, c9, T float64
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if uv < 0.0 {
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c0 = 0.0
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c1 = 1.6977288e-2
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c2 = -4.3514970e-7
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c3 = -1.5859697e-10
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c4 = -9.2502871e-14
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c5 = -2.6084314e-17
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c6 = -4.1360199e-21
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c7 = -3.4034030e-25
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c8 = -1.1564890e-29
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c9 = 0.0
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} else {
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c0 = 0.0
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c1 = 1.7057035e-2
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c2 = -2.3301759e-7
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c3 = 6.5435585e-12
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c4 = -7.3562749e-17
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c5 = -1.7896001e-21
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c6 = 8.4036165e-26
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c7 = -1.3735879e-30
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c8 = 1.0629823e-35
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c9 = -3.2447087e-41
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}
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T = c0 + uv*(c1+uv*(c2+uv*(c3+uv*(c4+uv*(c5+uv*(c6+uv*(c7+uv*(c8+uv*(c9)))))))))
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return T, nil
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}
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