Security device for a sensor
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Abstract
The invention relates to a security device for a sensor, especially a rotational speed sensor, wherein a sensor element and functional components enable the sensor to function and produce a sensor output signal. Said functional components form a functional section. Control components are provided in a control section and monitoring components are provided in a monitoring section. The control components are embodied in such a manner that they can control the functional components in a continuous manner and the monitoring components are embodied such that they can monitor the control components at least once during the a working cycle.
24 Citations
19 Claims
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1-11. -11. (canceled)
- 12. A safety device for a rotation rate sensor, comprising a sensor element and circuits including a function section, a checking section and a monitoring section, the function section including functional components supporting the function of the sensor and producing a sensor output signal, the checking section including checking components designed for the continuous checking of the functional components, and the monitoring section comprising monitoring components designed for monitoring the checking components at least once during one operating cycle, the monitoring components comprising a clock detector component monitoring a clock of a microcomputer contained in the checking section, a watchdog circuit monitoring the microcomputer and a memory testing device for testing memories within the checking section.
Specification