Sensor for measuring physical variables and for passing on the measured variable, circuit having such a sensor and method for operating the sensor and the circuit
First Claim
1. A sensor for measuring a variable, the sensor comprising:
- at least one converter element converting the variable into an electrical signal;
at least one electronic signal processing unit for at least one of conditioning or processing the electrical signal to provide a sensor signal, said at least one electronic signal processing unit having at least one diagnosis device; and
an interface for passing on the sensor signal through a connection to an electrical device;
said diagnosis device causing a fault signal instead of the sensor signal to be present at said interface when a fault occurs, for clearly distinguishing a fault at said interface from a processing fault.
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Accused Products
Abstract
A sensor for measuring a variable, in particular a physical variable, includes at least one converter element converting the variable into an electrical signal. At least one electronic signal processing unit conditions and/or processes the electrical signal to provide a sensor signal. The at least one electronic signal processing unit has at least one diagnosis device. An interface passes on the sensor signal through a connection, in particular a cable connection, to an electrical device, in particular a control device. The diagnosis device causes a fault signal instead of the sensor signal to be present at the interface when a fault occurs, for clearly distinguishing a fault at the interface from a processing fault. A circuit having such a sensor and a method for operating the sensor and the circuit are also provided.
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Citations
20 Claims
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1. A sensor for measuring a variable, the sensor comprising:
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at least one converter element converting the variable into an electrical signal;
at least one electronic signal processing unit for at least one of conditioning or processing the electrical signal to provide a sensor signal, said at least one electronic signal processing unit having at least one diagnosis device; and
an interface for passing on the sensor signal through a connection to an electrical device;
said diagnosis device causing a fault signal instead of the sensor signal to be present at said interface when a fault occurs, for clearly distinguishing a fault at said interface from a processing fault. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for operating a sensor, the method comprising the following steps:
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during fault-free operation, converting a variable to be measured into an electrical signal with a converter element and at least one of conditioning the electrical signal or processing the electrical signal with an electronic circuit to provide a sensor signal to be tapped off at an interface; and
during faulty operation, detecting at least one of an occurrence or a nature of a fault and producing a fault signal with a diagnosis device, to be tapped off instead of the sensor signal at the interface.
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Specification