| 摘要 |
A method and system for controlling the temperature of an oxygen sensor is provided wherein the method includes obtaining an oxygen sensor, a heating device, heating control device and a signal generator, wherein the oxygen sensor includes a reference cell and wherein the heating device is communicated with the oxygen sensor and the heating control device, introducing a fixed frequency sinusoidal signal to the reference cell through a voltage divider resistor so as to create a response signal, wherein the response signal is responsive to the temperature of the reference cell, buffering the response signal so as to create a buffered signal, applying the buffered signal to a high pass filter so as to create a filtered signal having a filtered signal magnitude, wherein the filtered signal magnitude is inversely proportional to the temperature of the reference cell, measuring the filtered signal so as to create a temperature signal responsive to the filtered signal magnitude and communicating the temperature signal to the heating control device.
|
