Measurement apparatus applicable to two-dimensional reconstruction of gas in combustion flow field

A measurement apparatus, comprising:

• an electrically controlled rotary table, an electronically controlled translation table combination, a laser transmitting/receiving end face, a measured area, a laser coupler combination, a laser transmitter, an etalon, a detector array, a laser, a multipath data acquisition card, a translation controller, a laser controller, and a computer;
• wherein the electronically controlled translation table combination comprises two electronically controlled translation tables, two fixing plates, and four fixing supports;
• a top of the electronically controlled translation tables are fixed on a rotary surface of the electrically controlled rotary table by screws;
• the four fixing supports are mounted on a bottom of the electronically controlled translation tables through the two fixing plates;
• the laser transmitting/receiving end face (3) comprises a fixing frame (301), 16 transmitting probes (302), and 16 receiving probes (303);
• eight circular holes are provided in each of four sidewalls of the fixing frame for mounting the 16 transmitting probes and the 16 receiving probes;
• a top side of the fixing frame is connected to the two fixing plates respectively;
• the laser coupler combination comprises 1×2 fiber beam splitters and a 1×16 fiber beam splitter;
• the laser comprises distributed feedback laser (DFB lasers) with different center wavelengths;
• laser beams emitted by the DFB lasers are combined into one beam by the 1×2 fiber beam splitter, and then the beam is split by the 1×2 fiber beam splitter into two, where one beam is split by the 1×16 fiber beam splitter into 16 beams, and the 16 beams are transmitted through fibers to the transmitting probes, and the other beam obtained by splitting by the 1×2 fiber beam splitter is transmitted through a single-mode fiber to the laser transmitter;
• the etalon receives free light transmitted by the laser transmitter;
• the detector array comprises 17 InGaAs detectors;
• the detector array receives light signals transferred by the etalon and the receiving probes through fibers;
• the detector array converts the light signals into electrical signals, and inputs the signals into the multipath data acquisition card by using a coaxial cable;
• the multipath data acquisition card inputs received data into the computer;
• the translation controller is connected to the electrically controlled rotary table, and the electronically controlled translation tables;
• and the laser controller is connected to the DFB lasers.