Related infrared filter device

The invention discloses a related infrared filter device. The related infrared filter device comprises a direct-current motor and a stepping motor arranged on a machine frame, wherein a related wheel chopper piece and a related wheel are respectively arranged at the shaft ends of the direct-current motor and the stepping motor; a direct-current motor detection optical coupling plate is arranged on the machine frame opposite to one side of the related wheel chopper piece; a stepping motor detection optical coupling plate is arranged on the machine frame opposite to the other side of the related wheel; an infrared light source is arranged on the top, opposite to the related wheel chopper piece, of the machine frame. According to the related infrared filter device, by the adoption of a split combination movement mode, the overall high-speed rotating mode of the related wheel and a light cutting piece is changed into the combination mode of the related wheel which is rotated and positioned in a stepping way at a low speed and a chopper piece which is rotated at a high speed; after the improvement, the load of a motor is reduced, and the chopping frequency of the chopper piece is improved; the related wheel is rotated stably, and the service life is prolonged; the wheel body of the related wheel is made of a hard aluminum material, the weight is light, the load of the motor is reduced, and the cost performance is high. The related infrared filter device is arranged on an automatic CO monitoring instrument, the maintenance workload of the instrument can be reduced, the maintenance cost can be saved, and the measurement accuracy can be improved by 30 percent.