Method for determining optical working current of MEMS methane sensor

• Main Authors: KONG XIANGLIN, DU YANA, CHEN PENG, MA HONGYU, DING ENJIE
• Format: Patent
• Language: Chinese; English
• Published: 07.06.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for determining the optical working current of an MEMS methane sensor. The method comprises the steps that a starting current, a stepping current and an ending current, supplied to the MEMS methane sensor, of a current source are set, I-V data obtained through measurement is scanned, and current-resistance (I-R) data obtained through this time of measurement is obtained according to the ohm law; testing is repeated till a maximum resistance value appears, and I-V data obtained through this time of measurement is recorded as complete I-V data; and a maximum voltage difference value in the complete I-V data is found, and the current corresponding to the maximum voltage difference value is recorded as the optical working current I. Through the method, the optical working current of the MEMS methane sensor can be determined, so that the MEMS methane sensor is in the optical working state and outputs optical sensitivity; and equipment in use is simple, the steps are clear, operatio