| 摘要 |
PROBLEM TO BE SOLVED: To provide a system and a method for detecting presence of components in a fluid by using a photo-acoustic spectroscopy.SOLUTION: A system includes a first chamber 218 having a sample fluid, and a second chamber 216 coupled to the first chamber, where the second chamber has a reference fluid. The system includes a modulated light source 202 for emitting a modulated light beam to the sample fluid and the reference fluid, to generate a first acoustic signal 238 in the first chamber and a second acoustic signal 240 in the second chamber. The system further includes a pressure sensor 236 disposed between the first chamber and the second chamber, for detecting a difference between the first acoustic signal and the second acoustic signal. The system includes a processor based module 228 communicatively coupled to the pressure sensor and configured to receive a signal representative of the difference and determine at least one of a component and the concentration of the component in the sample fluid. |
