Onboard device and method for analyzing fluid in a heat engine

摘要

A method for controlling a spectrometer for analyzing a product includes steps of: acquiring a measurement representative of the operation of a light source, determining, depending on the measurement, a value of supply current of the light source, and/or a value of integration time of light-sensitive cells of a sensor, disposed on a route of a light beam emitted by the light source and having interacted with a product to be analyzed, and if the integration time and/or supply current value is between threshold values, supplying the light source with a supply current corresponding to the determined supply current value, adjusting the integration time of a light-sensitive cell to the determined integration time value, and acquiring light intensity measurements supplied by the sensor, enabling a spectrum to be formed.

主权项

1. A method for controlling a spectrometer for analyzing a product, comprising:
sending a light beam from a light source of the spectrometer, transmitting the light beam to a product to be analyzed with which it interacts, and acquiring light intensity measurements enabling a spectrum to be formed, by means of a sensor of the spectrometer, disposed on a route of the light beam after it has interacted with the product to be analyzed, the acquisition of light intensity measurements comprising:
acquiring in the presence of the product to be analyzed measurements representative of the operation of the light source and independent of the product to be analyzed, the operation measurements comprising a measure of a temperature of the light source, anddetermining, depending on the operation measurements, a value of integration time of light-sensitive cells of the sensor, and when the integration time value is between threshold values, adjusting the integration time of the light-sensitive cells to the determined integration time valuedetermining, depending on the operation measurements, a value of supply current of the light source, and when the supply current value is within an ideal operating range, supplying the light source with a supply current corresponding to the determined supply current valuecomparing the integration time value to threshold values; andwhen the integration time value is not within the threshold values, adjusting a new value of the supply current of the light source such that the integration time value is within the threshold values, and when the supply current value is within the ideal operating range, supplying a supply current corresponding to the determined supply current value to the light source.