5 - 14
021591/02/09
A connected micro-controller calculates from these voltages the wind direction in 144 sectors (2.5° /
sector). Related to sector 1 is the wind direction
0° – 2,5°
, sector 144 corresponds to the wind
direction
357.5°- 360°
.
Sector
Gray-Code
Angle degree
Sector
Gray-Code
Angle degree
Sector
Gray-Code
Angle degree
Sector
Gray-Code
Angle degree
Sector
Gray-Code
Angle degree
Sector
Gray-Code
Angle degree
1
0 0,0
25
20
60,0 49
40
120,0
73
228
180,0
97
184 240,0
121
156
300,0
2
1 2,5
26
21
62,5 50
41
122,5
74
229
182,5
98
185 242,5
122
157
302,5
3
3 5,0
27
23
65,0 51
43
125,0
75
231
185,0
99
187 245,0
123
159
305,0
4
2 7,5
28
22
67,5 52
42
127,5
76
230
187,5
100
186 247,5
124
158
307,5
5
6 10,0
29
18
70,0 53
46
130,0
77
226
190,0
101
190 250,0
125
154
310,0
6
7 12,5
30
19
72,5 54
47
132,5
78
227
192,5
102
191 252,5
126
155
312,5
7
5 15,0
31
17
75,0 55
45
135,0
79
225
195,0
103
189 255,0
127
153
315,0
8
4 17,5
32
16
77,5 56
44
137,5
80
224
197,5
104
188 257,5
128
152
317,5
9
12 20,0
33
48
80,0 57
36
140,0
81
160
200,0
105
180 260,0
129
136
320,0
10
13 22,5
34
49
82,5 58
37
142,5
82
161
202,5
106
181 262,5
130
137
322,5
11
15 25,0
35
51
85,0 59
39
145,0
83
163
205,0
107
183 265,0
131
139
325,0
12
14 27,5
36
50
87,5 60
38
147,5
84
162
207,5
108
182 267,5
132
138
327,5
13
10 30,0
37
54
90,0 61
34
150,0
85
166
210,0
109
178 270,0
133
142
330,0
14
11 32,5
38
55
92,5 62
35
152,5
86
167
212,5
110
179 272,5
134
143
332,5
15
9 35,0
39
53
95,0 63
33
155,0
87
165
215,0
111
177 275,0
135
141
335,0
16
8 37,5
40
52
97,5 64
32
157,5
88
164
217,5
112
176 277,5
136
140
337,5
17
24 40,0
41
60
100,0 65
96
160,0
89
172
220,0
113
144 280,0
137
132
340,0
18
25 42,5
42
61
102,5 66
97
162,5
90
173
222,5
114
145 282,5
138
133
342,5
19
27 45,0
43
63
105,0 67
99
165,0
91
175
225,0
115
147 285,0
139
135
345,0
20
26 47,5
44
62
107,5 68
98
167,5
92
174
227,5
116
146 287,5
140
134
347,5
21
30 50,0
45
58
110,0 69
102
170,0
93
170
230,0
117
150 290,0
141
130
350,0
22
31 52,5
46
59
112,5 70
103
172,5
94
171
232,5
118
151 292,5
142
131
352,5
23
29 55,0
47
57
115,0 71
101
175,0
95
169
235,0
119
149 295,0
143
129
355,0
24
28 57,5
48
56
117,5 72
100
177,5
96
168
237,5
120
148 297,5
144
128
357,5
Figure 1: Thies Code table for 8 bit parallel
4
Recommendation Side Selection/ Standard Installation
In general wind measurement instruments should be able to detect the wind conditions of a large
area. In order to obtain comparable values when determining the surface wind, measurements
should be taken at a height of 10 meters over an even unobstructed area. An unobstructed area
means that the distance between the wind transmitter and an obstacle should be at least 10 times
the height of the obstacle (s. VDI 3786). If it is not possible to fulfil this condition, then the wind
transmitter should be set up a height where local obstacles do not influence the measured values to
any significant extent (approx. 6 - 10 m above the obstacle).
The wind transmitter should be set up in the centre of flat roofs and not on the roof side in order to
avoid bias in the direction (privileged directions).