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Yeti Ultrasoon measurements Always mouseclick to go to the next sheet. V1.1 2009.05.01: Sheet 4-8 now correct signal names. Sheet 1 of 8.

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Presentation on theme: "Yeti Ultrasoon measurements Always mouseclick to go to the next sheet. V1.1 2009.05.01: Sheet 4-8 now correct signal names. Sheet 1 of 8."— Presentation transcript:

1 Yeti Ultrasoon measurements Always mouseclick to go to the next sheet. V1.1 2009.05.01: Sheet 4-8 now correct signal names. Sheet 1 of 8

2 CH1: CON1-13 CH2: CON1-15Pulses created by microcontroller Discharge curve going to microcontroller analoge comparator Sheet 2 of 8

3 CH1: CON1-13 CH2: CON1-15Pulses created by microcontroller Discharge curve going to microcontroller analoge comparator Each 500us equals 500us/56us = 9cm distance Sheet 3 of 8

4 CH1: CON1-13 CH2: CON1-6Signal from ultrasoon receiver going to microcontroller analog comparator Discharge curve going to microcontroller analog comparator Unwanted ‘in-head’ reflections No mechanical precautions used. Reflections from object 60cm away. Moment of object detection at 5cm distance. (56us/cm) Sheet 4 of 8

5 Wadding used inside Yeti’s head Reflections from object 60cm away. Moment of object detection at 6cm distance. (56us/cm) CH1: CON1-13 CH2: CON1-6Signal from ultrasoon receiver going to microcontroller analog comparator Discharge curve going to microcontroller analog comparator Sheet 5 of 8

6 Extra piece of foam placed at front inside Yeti’s head between the transmitter and the receiver. Reflections from object 60cm away. Moment of object detection at 6cm distance. (56us/cm) CH1: CON1-13 CH2: CON1-6Signal from ultrasoon receiver going to microcontroller analog comparator Discharge curve going to microcontroller analog comparator Sheet 6 of 8

7 External ‘nose’ added outside Yeti’s head Reflections from object 60cm away. Now accurate distance measurements can be made from 3cm up to appr. 70cm. Moment of object detection at 60cm distance. CH1: CON1-13 CH2: CON1-6Signal from ultrasoon receiver going to microcontroller analog comparator Discharge curve going to microcontroller analog comparator Sheet 7 of 8

8 That’s it Folks! Arexx-Henk h.van.winkoop@wxs.nl Sheet 8 of 8


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