Testing rotary movement-electrical signal transducer system, particularly for vehicle wheel anti-block transducer systems

US4092853A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Erich Schneider · Tauberbischofsheim, DE
• Eberhard Schnaibel · Hemmingen, DE
• Helmut Fleischer · Florstadt, DE

Key dates

• Filing date: Oct 18, 1976
• Grant date: Jun 6, 1978
• Expiry date: Oct 18, 1996

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2270/416
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The time duration of output pulses from the transducer, including wave-shaping circuits, if used, is measured and compared with respect to predetermined time limits. Two sequential pulses are measured and stored. If both pulses are shorter than a predetermined time interval, no alarm signal is generated; if the first pulse is longer than a predetermined time interval and the second also longer than a predetermined time interval, an alarm signal generation circuit, otherwise activated by the second, longer signal, is inhibited (since acceleration or deceleration of the wheel is indicated); if, however, the time duration of the second sequential pulse is longer than a predetermined time interval, but the time duration of the preceding pulse is shorter than its time duration threshold value, the malfunction signal is not inhibited, indicative of malfunction, loose contacts, or the like.