81 lines
1.5 KiB
Go
81 lines
1.5 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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B_MAX_C = 1820.0
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B_MIN_C = 0.0 // was 250
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B_MAX_UV = 13820.0
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B_MIN_UV = 291.0
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)
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func b_c_to_uv(c float64) (float64, error) {
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if c < B_MIN_C || c > B_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, E float64
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if c < 630.15 {
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c0 = 0.0
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c1 = -2.4650818346e-1
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c2 = 5.9040421171e-3
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c3 = -1.3257931636e-6
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c4 = 1.5668291901e-9
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c5 = -1.6944529240e-12
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c6 = 6.2290347094e-16
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c7 = 0.0
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c8 = 0.0
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} else {
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c0 = -3.8938168621e3
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c1 = 2.8571747470e1
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c2 = -8.4885104785e-2
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c3 = 1.5785280164e-4
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c4 = -1.6835344864e-7
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c5 = 1.1109794013e-10
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c6 = -4.4515431033e-14
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c7 = 9.8975640821e-18
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c8 = -9.3791330289e-22
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}
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E = c0 + c*(c1+c*(c2+c*(c2+c*(c3+c*(c4+c*(c5+c*(c6+c*(c7+c*(c8)))))))))
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return E, nil
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}
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func b_uv_to_c(uv float64) (float64, error) {
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if uv < B_MIN_UV || uv > B_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, T float64
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if uv < 2431.0 {
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c0 = 9.8423321e1
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c1 = 6.9971500e-1
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c2 = -8.4765304e-4
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c3 = 1.0052644e-6
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c4 = -8.3345952e-10
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c5 = 4.5508542e-13
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c6 = -1.5523037e-16
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c7 = 2.9886750e-20
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c8 = -2.4742860e-24
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} else {
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c0 = 2.1315071e2
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c1 = 2.8510504e-1
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c2 = -5.2742887e-5
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c3 = 9.9160804e-9
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c4 = -1.2965303e-12
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c5 = 1.1195870e-16
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c6 = -6.0625199e-21
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c7 = 1.8661696e-25
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c8 = -2.4878585e-30
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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))))))))
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return T, nil
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}
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