| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensor control device and gas detection system that can suppress increase in noise component even when speeding up a sampling cycle of a digital signal.SOLUTION: A sensor control device of a gas detection system comprises a digital computation unit 33 that has each function of a PID computation unit 61, a first filter unit 63, and a second filter unit 65. The first filter unit 63 is configured to extract a DAC control signal S1 (a first filter signal S1) from a digital signal expressing an electrification control electric current Tip computed by the PID computation unit 61 by means of a digital computation. The DAC control signal S1 is the digital signal which indicates the electrification control electric current Tip of a pump electric current Ip, in which noise components superposed by the digital computation in the PID computation unit 61 are attenuated. Thus, even when speeding up a sampling cycle of the pump electric current Ip (the digital signal), increase in differential noise component in the pump electric current Ip can be suppressed.SELECTED DRAWING: Figure 3 |
