Acoustic surface wave gas sensor array with single-used reference

• Main Authors: QIU DONG, JIANG YADONG, WU PENGLIN, LIN QINGHAO, DU XIAOSONG
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2013
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses an acoustic surface wave gas sensor array with a single-used reference. The acoustic surface wave gas sensor array comprises n measurement sensors and n reference sensors and further comprises a sensor array circuit board provided with 2n oscillation circuits, and an air chamber formed by tightly buckling an air cover on the circuit board; the n measurement sensors and the n reference sensors are mounted in the air chamber at the same time; the measurement sensors and the reference sensors are respectively arrayed into two rows along an air flow direction; the measurement sensors and the reference sensors at the opposite potions of an air flow are respectively in one pair, and is subjected to circuit frequency mixing to output n difference frequency signals. According to the acoustic surface wave gas sensor array disclosed by the invention, the measurement sensors and the reference sensors are located on equal-temperature points of an air flow temperature field so that the influences o