Hi,
We are thinking of purchasing a V120:Duo, but we need to know if it can accept an external trigger to force it to take a 6DoF measurement at a particular instant in time so that we can sync that measurement with another sensor. Is this possible through the I/O-X sync box described in the Duo's literature?
Thanks,
Kam...
V120:Duo external trigger possible?
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NaturalPoint - Mike
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- Joined: Tue Feb 01, 2011 8:41 am
- Location: Corvallis, OR
Re: V120:Duo external trigger possible?
Hello -
Yes! The I/O-X unit functions exactly like the internal and external sync jacks of an OptiHub, and uses the same interface in Tracking Tools, Arena, and the Camera SDK.
Yes! The I/O-X unit functions exactly like the internal and external sync jacks of an OptiHub, and uses the same interface in Tracking Tools, Arena, and the Camera SDK.
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kamelsaidi
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- Joined: Wed Mar 07, 2012 9:52 am
Re: V120:Duo external trigger possible?
Great! Thanks.
Do we need any special cables to use the I/O-X sync capability?
Do we need any special cables to use the I/O-X sync capability?
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NaturalPoint - Mike
- Posts: 1896
- Joined: Tue Feb 01, 2011 8:41 am
- Location: Corvallis, OR
Re: V120:Duo external trigger possible?
Nope! The I/O-X has BNC jacks on it, however you can adapt those to just about anything that carries your signal.
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kamelsaidi
- Posts: 5
- Joined: Wed Mar 07, 2012 9:52 am
Re: V120:Duo external trigger possible?
Mike,
Following our telephone conversations yesterday, we did some tests in our lab to figure out why sending a 5 Volt signal to the Sync-In port on the I/O-X unit was not triggering our V120 Duo camera.
What we noticed was that the Sync-In port is at a constant 3.2 V when measured directly with a multimeter (which suggest LVTTL not TTL). In addition, we noticed that when the Sync-In port's terminals are shorted the camera is triggered. Is this normal? If so, then how is sending a 5 V signal to this port supposed to trigger the camera?
Could you please clarify (with possibly a circuit diagram of the I/O-X) what behavior the Sync-In port is expecting to see in order to trigger the camera? I don't want to damage anything by continuously shorting the Sync-In port if that's not the normal behavior.
Thanks,
Kam...
Following our telephone conversations yesterday, we did some tests in our lab to figure out why sending a 5 Volt signal to the Sync-In port on the I/O-X unit was not triggering our V120 Duo camera.
What we noticed was that the Sync-In port is at a constant 3.2 V when measured directly with a multimeter (which suggest LVTTL not TTL). In addition, we noticed that when the Sync-In port's terminals are shorted the camera is triggered. Is this normal? If so, then how is sending a 5 V signal to this port supposed to trigger the camera?
Could you please clarify (with possibly a circuit diagram of the I/O-X) what behavior the Sync-In port is expecting to see in order to trigger the camera? I don't want to damage anything by continuously shorting the Sync-In port if that's not the normal behavior.
Thanks,
Kam...
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NaturalPoint - Mike
- Posts: 1896
- Joined: Tue Feb 01, 2011 8:41 am
- Location: Corvallis, OR
Re: V120:Duo external trigger possible?
You're correct, it is 3.2v TTL, I had previously misspoken on this. You should be fine, though. I spoke with our hardware developer, and he suggested the following:
What you can do is set synchronization to low gated and provide a closure on the sync in when you want frames taken, however it will take them at full speed for the duration of the closure. High gated will work on a normally closed circuit to allow frames on a break in continuity. You can additionally use single pulses with the switch to trigger individual frames with a single closure. You don't need to use voltage to drive a signal with this method, just a closure.
What you can do is set synchronization to low gated and provide a closure on the sync in when you want frames taken, however it will take them at full speed for the duration of the closure. High gated will work on a normally closed circuit to allow frames on a break in continuity. You can additionally use single pulses with the switch to trigger individual frames with a single closure. You don't need to use voltage to drive a signal with this method, just a closure.