| 摘要 |
In a flame detector having a first opto-electric transducer (T1) whose relative sensitivity has an extreme value in the visible to the near infrared wavelength region, and a signal conditioning circuit downstream of the transducer, a second opto-electric transducer (T2) whose relative sensitivity has an extreme value in the visible to near infrared wavelength region and at least one extreme value in the ultraviolet wavelength region is connected in parallel with the first transducer (T1) but, relative to the photocurrent flowing through the transducers (T1, T2), in opposition with the first transducer (T1) to the input of the signal-conditioning circuit (S1), so that the signals generated by the transducers (T1, T2) compensate one another in the visible to near infrared wavelength region. A pyroelectric sensor (T3) can be connected for the infrared wavelength region to the signal-conditioning circuit (S1).
|
