Figure 1 | Scientific Reports

Figure 1

From: Automated differentiation of mixed populations of free-flying female mosquitoes under semi-field conditions

Figure 1

Overview of the tested BG-I optoacoustic trap design. (a) The infrared-LED sensor array of the BG-I trap system is positioned 20 cm above an integrated BG-Counter 2® (Biogents AG, Regensburg, Germany) unit. In the space between the IR-LED array and the BG-Counter trap funnel (the ‘observation volume’), mosquitoes are in free flight. They reflect and scatter IR light as a superposition of a constant ‘body signal’ and a time-varying wingbeat signal. This signal is recorded continuously using a large-area photodiode, transimpedance amplifier and analog-to-digital converter. The digitized wingbeat recording is stored in a ring buffer. (b) Incorporation of the BG-I electronics and sensor array with the commercially available BG-Counter 2® (Biogents AG, Regensburg, Germany) smart trap system. The BG-Counter 2 provides a trigger signal to the BG-I to retrieve the data from the wingbeat recorder from the preceding 200 ms of flight in the observation volume, marking the point just before the mosquito was captured by the airflow of the suction trap.

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