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US 8,818,638 B2Granted
Device and method for triggering passenger protection means
AssigneeRobert Bosch GmbH
InventorsMatthias Wellhoefer, Volker Frese
Life of this patent
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Abstract
A device and a method for triggering passenger protection means as a function of signals of a sensor module is provided. For example, the sensor module includes at least two sensors which are accommodated in one housing. The signal conditioning for the at least two sensors takes place on separate hardware paths.
Claims16
A device for triggering a passenger protection system, comprising:
- a sensor module including:
- first and second sensors in one housing;
- first and second separate hardware paths including respective signal conditioning circuits for the first and second sensors;
- a first monitoring circuit to monitor a first operating characteristic of the first hardware path;
- and
- a second monitoring circuit to monitor a second operating characteristic of the second hardware path, the monitored first and second operating characteristics being compared to each other;
- and
- an evaluation circuit, the evaluation circuit effecting the triggering of the passenger protection system upon receipt of signals from the sensor module;
- wherein the first operating characteristic is a first pulse count of a first pulse signal generated for the first sensor, and the second operating characteristic is a second pulse count of a second pulse signal generated for the second sensor.
6 more elements
A device for triggering a passenger protection system, comprising:
- a sensor module including:
- first and second sensors in one housing;
- first and second separate hardware paths including respective signal conditioning circuits for the first and second sensors;
- a first monitoring circuit to monitor a first operating characteristic of the first hardware path;
- and
- a second monitoring circuit to monitor a second operating characteristic of the second hardware path, the monitored first and second operating characteristics being compared to each other;
- and
- an evaluation circuit, the evaluation circuit effecting the triggering of the passenger protection system upon receipt of signals from the sensor module;
- wherein the first monitoring circuit is connected to the first and second hardware paths to monitor a first voltage supply of the first hardware path, and the second monitoring circuit is connected to the first and second hardware paths to monitor a second voltage supply of the second hardware path, and wherein the first operating characteristic is a first pulse count of a first pulse signal generated for the first sensor, and the second operating characteristic is a second pulse count of a second pulse signal generated for the second sensor.
6 more elements
A method for a triggering passenger protection system, comprising:
- signaling by a sensor module to trigger the passenger protection system, wherein the sensor module includes:
- first and second sensors in a single housing;
- first and second separate hardware paths including signal conditioning circuits respectively for the first and second sensors;
- a first monitoring circuit to monitor a first operating characteristic of the first hardware path;
- and
- a second monitoring circuit to monitor a second operating characteristic of the second hardware path, the monitored first and second operating characteristics being compared to each other;
- and
- generating a first pulse signal for the first sensor and a second pulse signal for the second sensor, wherein the first operating characteristic is a first pulse count of the first pulse signal and the second operating characteristic is a second pulse count of the second pulse signal.
5 more elements
A method for a triggering passenger protection system, comprising:
- signaling by a sensor module to trigger the passenger protection system;
- wherein:
- the sensor module includes:
- first and second sensors in a single housing;
- first and second separate hardware paths including signal conditioning circuits respectively for the first and second sensors;
- a first monitoring circuit to monitor a first operating characteristic of the first hardware path;
- and
- a second monitoring circuit to monitor a second operating characteristic of the second hardware path, the monitored first and second operating characteristics being compared to each other;
- and
- the first monitoring circuit is connected to the first and second hardware paths to monitor a first voltage supply of the first hardware path, and the second monitoring circuit is connected to the first and second hardware paths to monitor a second voltage supply of the second hardware path;
- and the first operating characteristic is a first pulse count of a first pulse signal generated for the first sensor, and the second operating characteristic is a second pulse count of a second pulse signal generated for the second sensor.
8 more elements
Dependencies are inferred from the claim text.