08-03-11 Test of GateSystem PD3CD3 and PD4CD4

Goal of today

Emir and Jakob would test how the two different designs compared to each other.

After testing, they would decide which design they would choose.

Result

Emir and Jakob decided to use the old PD3CD3 , due to better read signal.

Journal

Proof of glitches

When a car is approaching the gate, there is a success rate of 80% that the gate opens at the right distance. In the other 20% the gate opens earlier. We constructed a test to proof the glitches occurred when approaching the gate.

Here we have a test result from the gate sensor when a car is approaching it

The gray area is the appearance of two glitches. The red line indicates the value to make the gate open.

Both the glitches would have made the gate open at a wrong distance.

Sonic tests

Test the PD4CD4 if there will be a higher success rate of the gate opening at the right distance.

Test of the new sonic sensor on PD4CD4. In this setup there is only one sensor active. Notice that the sensor on the gate has been removed (it is marked with a red circle). Here is a picture of the setup, and data from 40 seconds.

Test of the new sonic sensor on PD4CD4. In this setup, there are two sensors active. Notice that the sonic sensor has been placed back on the gate (it is marked with a red circle). Here is the picture of a setup, and data from 40 seconds.

Test of three sonic sensors active at the same time. A car is standing close, to simulate a car approaching. Here is a picture of the setup, and data from 40 seconds.

The results show that the more sonic sensors which are active, the worse the readings are. The sonic sensors will interfere too much with each other. We have decided to use the old PD3CD3, and accept that in some cases, the car will open earlier than expected.