J-Mate

Gregory

Gregory Suvey Tech III LCEO
We just approved the purchase of the J-Mate on this year's budget when I saw you could sign up as a volunteer. I never heard back about the volunteer request and we are ready to purchase. Can you even purchase the J-Mate yet, the site looks like you can buy it?
Thanks,
Gregory
 

Adam

Well-Known Member
5PLS
We just approved the purchase of the J-Mate on this year's budget when I saw you could sign up as a volunteer. I never heard back about the volunteer request and we are ready to purchase. Can you even purchase the J-Mate yet, the site looks like you can buy it?
Thanks,
Gregory
The Volunteer testing has not started yet Gregory. I would suggest waiting until that process is over before purchasing.
 

Patrick Garner

Active Member
Adam, any schedule on the actual beta testing yet? I'm hoping my couple weeks with it results in a POB article. March, April? :)
 

Adam

Well-Known Member
5PLS
I really don't know when things will happen but it does seem things are progressing nicely.
 

Javad

Administrator
Staff member
5PLS
Gentlemen, as I wrote in the other forum; please don't insult the J-Mate!!!! J-Mate is NOT a "Total Station"!!!. J-Mate plus TRIUMPH-LS are "Total Solution". TRIUMPH-LS carry you on long distances and J-Mate where GNSS signals are not available.
The delay in releasing J-Mate was because we replaced the liquid vials to accurate integrated electronic vials/inclinometers which monitors and corrects for inclinations.
 

Gregory

Gregory Suvey Tech III LCEO
I was only saying that if you are willing to give volunteers 50% off for testing, why not offer 50% off for those of us that are ready to purchase! I will continue to give feedback of the use! ;)
 

Javad

Administrator
Staff member
5PLS
Michael Glutting, please add Gregory to the list of volunteers who want to test. Go to 21 testers. He seems to be a cool surveyor. Testers don't need to buy if they don't like it. Others also can return if they buy and they don't like it. 100% refund. We can ship more in about three weeks. Shortage of parts from vendors.
 

Joe Paulin

Active Member
Javad, can you comment on when the testers will be notified of their selection? Also a rough timeline on when they will be receiving units? This will help me (everyone) plan accordingly.
 

Nistorescu Sorin

Active Member
J-Mate is a new, atypically device and people will look at it with some skepticism asking themselves about the laser behavior in a forest environment with dense foliage/pines also difficult enough for any LS-like receiver. But J-Mate can do more, I think..

Measuring a wooded trench (picture 1), 30-50m away from the forest clearing, is not an easy task. If the trench is straight, I can make some offsets from the open area using my receiver, but with changing directions, it becomes more difficult. A dense forest with spikes and branches could challenge even the LS and J-Mate with laser. Almost certainly the crew will lose time, cutting and dialoguing... (1-2, 3-4, 5-6-7).

J-Mate backsight.jpg


From my point of view, I can hear the guys making all kind of "spread spectrum" sounds in the canopy. I can also differentiate the persons and make a coarse estimation of their positions. But I can't see them. In the same way, with a proper device, the position of a stationary subject (as far as I know) can be estimated with accuracy around 20-30 mm from 30-40m distance using spread spectrum sounds.

Probably, with some narrow-beam microphone attached to J-Mate, a distance could be calculated by measuring the time of flight of the sound wave from the subject and then multiplying it by the sound velocity, for a better positioning. And the correct distance will indicate the correct azimuth for J-Mate. Maybe a better alternative when cellular doesn't work, a base-rover solution could be expensive and cutting could take most of the day work.

Next picture shows a 30 years old property line in the older dense forest and the newly grown forest (30-50m width) that is beautiful, but is a nightmare for every surveyor and a much more capable robotic total station will be blind in a dense foliage/pines environment.

Wooded property line.png


In real life, there are many factors that need to be taken into account, such as temperature gradient, wind, background noise and the presence of obstacles, but I imagine J-Target (or the phone) with sound capabilities and J-Mate + LS estimating signal sounds, with multiple engines and built-in, real-time spectrum analyzer.

Anyway, for me this is just a suggestion, but when it comes to signals, Javad team is the right choice. They create things which seem impossible to others..
 

jahalnon

Member
Coming late to the party, just saw the insert in American Surveyor and thought I would sign up. More importantly though, I was hoping someone was either testing or even purchasing the J-mate in the MA and RI area as I would love to see it in action.
Looking forward to reactions and insight from Shawn.

John
 

Joe Paulin

Active Member
Well, shoot, I am bummed out, I didn't make the list of testers for the J-Mate. I received an email last night from Michael G letting me know that I wasn't selected. Did anyone receive notification that they WERE selected?
 
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