Page 166 - Sensors and Control Systems in Manufacturing
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Classification and Types of Sensors
FIGURE 2.132 Measurement of the outer diameter after center-less grinding. 127
• Measurement of outer diameter after centerless grinding. The scan-
ning head allows continuous noncontact measurement of a
metal shaft immediately after the grinding process (Fig. 2.132).
Food processing and packaging:
• Detection of material caught during heat sealing. Detects mate-
rial caught in the distance between rollers (Fig. 2.133).
• Detection of missing or doubled packing ring in cap. Detects a
missing or doubled rubber ring in caps by using the com-
parator to evaluate sensor signals (Fig. 2.134).
• Detection of incorrectly positioned small objects. The transmitter
and the receiver are installed to allow a parallel light beam to
scan slightly above the tablet sheets. When a single tablet
projects from a line of tablets, the optical axis is interrupted
and the light quantity changes (Fig. 2.135).
FIGURE 2.133 Detection of material caught during heat sealing.
