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AssigneesHonda Motor Co., Ltd., Ngk Spark Plug Co., Ltd.
InventorsAkitsugu IKEDA, Michinori TANI, Yuzo HIGUCHI, Satoru ABE
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A sensor system includes a sensor element to which a control current is inputted, a DA converter to output the control current, and a control part configured to generate a control current instruction value and input the control current instruction value to the DAC, and further includes an instruction value generation part to sequentially generate an inspection current instruction value to be inputted to the DAC instead of the control current instruction value, an inspection current detection part to detect an inspection current value of an inspection current, an expected value calculation part to calculate an inspection current expected value, a difference value acquisition part to acquire a difference value between the inspection current value and the inspection current expected value, and a failure detection part to detect a failure of a bit in the DA converter, by frequency analysis of a temporal change of the difference value.
A sensor system comprising:
A failure detection method for a sensor system including a sensor element to which a control current is inputted, a DA converter configured to output the control current toward the sensor element, and a control part configured to generate a control current instruction value corresponding to a magnitude of the control current and input the control current instruction value to the DA converter, the failure detection method comprising:
Dependencies are inferred from the claim text.