Gas-sensor arrangement for detecting target-gas concentration

摘要

An NDIR gas-sensor arrangement for measuring a target-gas concentration comprises a variable-power infrared-radiation emitter that can project radiant energy from one side of a space containing the target gas and through the space to the other side thereof, a infrared-radiation receiver on the other side of the space and positioned to be irradiated by the radiant energy projected by the emitter through the space for emitting a signal corresponding to radiation received, and a filter between the receiver and the space and permeable only to radiation of a wavelength range that corresponds to the target gas. A controller connected to the radiation receiver calculates the target-gas concentration on the basis of the signal from the receiver to the controller.

主权项

1. A gas-sensor arrangement for measuring a target-gas concentration, the arrangement comprising:
a variable-power infrared-radiation emitter that can project radiant energy in a first operating mode at a low power and in a second operating mode at a high power from one side of a space containing the target gas and through the space to the other side thereof; a infrared-radiation receiver on the other side of the space and positioned to be irradiated by the radiant energy projected by the emitter through the space for emitting a signal corresponding to radiation received; a filter between the receiver and the space and permeable only to radiation of a wavelength range that corresponds to the target gas; and a controller connected to the radiation receiver for calculating the target-gas concentration on the basis of the signal from the receiver and for, when in the first operating mode, switching the emitter from the first operating mode to the second operating modes in dependence on detector signals detected in the controller.