Tone wheels

Fig. 7.9.8 a) Examples of passive wheel- sors for steel tone wheel or multipole tone... 

Fig. 7.9.9 a) Cap sensor consists of direct connected wheel-speed sensor, cap, and multipole tone wheel b) clip sensor with depending fixture (without screw) c) cap-ring sensor... 

Fig. 7.9.10 a) Wheel bearing with integrated multipole tone wheel b) wheel-speed sensor with in-bearing application (tone wheel not visible)... 

Fig. 7.9.11 Examples of sensor installation position and arrangement to the tone wheel...

The switching hysteresis can be compared with a defined angle of rotation regarding the tone wheel. So there is a hysteresis regarding the angle angle hysteresis. Fig. 7.9.16 shows the magnetized encoder. The movement of the tone wheel... 

Fig. 7.9.15 Magnetic sensor input signal modulated by the tone wheel rotation (blue line). Switching thresholds for defined switching to prevent unwanted switching (green line). Generated sensor output signal by the comparator circuit (red line)...

Fig. 7.9.17 Arrangement of tone wheel and wheel-speed sensor, airgap range, possible deflection D, and deflection direction...

Share my pleasure at this puzzle and its resolution," said the darker to the older, and he passed his hand across his companion s eyes. The older man then stood in the dream and watched the puzzle—a world of form and law, interlocking wheels and passion and intellect—unfold. He passed into its species and empires, dynastic families and individual men of genius, he became its philosophers and weathered its catastrophes. He felt the texture and tone of all the beings in the world his friend had created. He sought the secret pattern his friend, he knew, had surely hidden in his creation, for this was a game that they often played. 

Note To test, tap the wheel gently with a light non-metallic instrument. If it sounds cracked or dead, it could fly apart in operations, so do not use it. The sound of an undamaged wheel will be a clear metallic tone or ring. ... 

I kept winding the hand-wheel and then, quite suddenly, I heard some bangs as various valves closed and electrical breakers opened, and the 3000 revolutions per minute tone of the huge 250 MW spinning main turbine suddenly lowered in pitch as the turbine began to slow dovra. With a sinking feeling, I realized the whole plant had tripped. 

---