Title:
FAILURE DETERMINATION DEVICE, CONTROL DEVICE, AND FAILURE DETERMINATION METHOD
Document Type and Number:
Japanese Patent JP2023114140
Kind Code:
A
Abstract:
To accurately detect a failure of a DA conversion circuit.SOLUTION: A failure determination device for a DA conversion circuit includes an output unit 24 that inputs a first digital value to a DA conversion circuit 5 and causes the DA conversion circuit to generate an analog electric output, an acquisition unit 25 that acquires a second digital value corresponding to a difference between the analog electrical output of the DA conversion circuit and a target analog electrical output indicated by the first digital value, and a diagnosis unit 26 that diagnoses the failure of the DA conversion circuit on the basis of the second digital value, and the output unit increments the first digital value at the first time interval and inputs it to the DA conversion circuit, the acquisition unit acquires the second digital value at the second time interval shorter than the first time interval, and the diagnosis unit determines whether there is a failure in the DA conversion circuit on the basis of the signal strength of an AC component of the predetermined frequency included in a discrete signal which is the second digital value acquired at the second time interval.SELECTED DRAWING: Figure 1
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Inventors:
SATO YASUNARI
Application Number:
JP2022016311A
Publication Date:
August 17, 2023
Filing Date:
February 04, 2022
Export Citation:
Assignee:
HONDA MOTOR CO LTD
International Classes:
H03M1/10; G01R31/00
Attorney, Agent or Firm:
Kushibuchi International Patent Office
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