12v magic eye sensor

[Justme]

Knowing just how sheep races work & the conditions they work in I would have a manual trip set off by the sheep passing over a weight plate.

Or a simple switch near the operator.

Electrics / electronics wont last long in a sheep environment.

 

[Robotstar5]

If IFM don't have the sensor you want, it hasn't been invented

 

[sako243]

Electrics / electronics wont last long in a sheep environment.

Done properly it will last absolutely fine - the problem is very very very few people do it properly. Electronics are the easy way to save money in a lot of things thus they don't get done properly.

As an example my old department had built a system that saw temperature cycles from -20°C to 85°C daily, was running flat out (large signal processing system) for 10 years (when I left) without a single error or problem, nor any downtime in those 10 years.

 

[Bravheart]

What would be the proper name for a sensor that i need..



12v input

Needs to trigger a 12v output when something passes with 300mm or so of it

Can't have a pair of sensors either side with a light beam between them needs to be just the one side

Think of a 500mm passageway and i need to trigger a air solenoid to open when something goes down the passageway within say 0.5 seconds



For anyone interested I'm building a air powered sheep clamp for general tasks foottrimming etc but would like it to shut automatically when a sheep runs through so 1 person can use it on their own



Tepari sheep handler on youtube is what I'm making only a slightly simpler version as that one is £25k

Re read this and note its to be air powered. How close by is the compressor, think the same power supply could power the switches

 

[gaz1]

What would be the proper name for a sensor that i need..

12v input
Needs to trigger a 12v output when something passes with 300mm or so of it
Can't have a pair of sensors either side with a light beam between them needs to be just the one side
Think of a 500mm passageway and i need to trigger a air solenoid to open when something goes down the passageway within say 0.5 seconds

For anyone interested I'm building a air powered sheep clamp for general tasks foottrimming etc but would like it to shut automatically when a sheep runs through so 1 person can use it on their own

Tepari sheep handler on youtube is what I'm making only a slightly simpler version as that one is £25k

Knowing just how sheep races work & the conditions they work in I would have a manual trip set off by the sheep passing over a weight plate.

Or a simple switch near the operator.

Electrics / electronics wont last long in a sheep environment.

 

[Fraserb]

Knowing just how sheep races work & the conditions they work in I would have a manual trip set off by the sheep passing over a weight plate.

Or a simple switch near the operator.

Electrics / electronics wont last long in a sheep environment.

Ours are used in the milking parlour so are always either wet or covered in slurry, they last pretty well.

I forgot to get the part no today, will sort it tomorrow.

 

[s410man]

Knowing just how sheep races work & the conditions they work in I would have a manual trip set off by the sheep passing over a weight plate.

Or a simple switch near the operator.

Electrics / electronics wont last long in a sheep environment.

I think there's a argument to be made that well designed electrics can be more reliable than manual systems due to less wear and tear but as has been said the key is in the design and quality of components used

Manual all depends on if the sheep jump as it enters etc so could activate it to early/late

Will be a similar setup to that first video but air powered-easy enough to turn the 40kgs lambs in that video but put a 120kg tup in there and a lot of people would struggle!

 

[s410man]

It sounds like a PIR sensor is what you're after, the sort of thing you get on floodlights.

I've ordered 2 different ones of amazon I'm just wondering if they'll react fast enougb but they weren't massive money if they don't!

If IFM don't have the sensor you want, it hasn't been invented

I'll be on the phone to them first thing in the morning thanks!

 

[s410man]

I have one of these, which I think would do but you would have to check the data sheet.

I think that would do what i need looking at the data sheet but I'll admit i don't really know what I'm looking at!

Would it give a strong enough signal to operate a 12v solenoid air valve or would i need some sort of transistor or relay thingy to boost the power?

 

[sako243]

@s410man I've got a LIDAR-Lite3 module lying around which is quick at responding and measuring distances. Certainly works up to 15ft because that's the ceiling height in my temporary office.

It's not quite as straightforward as you want because you do need a microcontroller to talk to it but that's trivial enough. You could make it self calibrating as when you switch it on it takes a measurement to know where "empty" is then anything less than that triggers it.

You could probably get away with an ultrasound variant for measuring distance instead. I only mention the LIDAR one because I happen to have one for a digger measurement system I was experimenting with.

When you next pop down to the machinery sale I could dig it out and show you if you wanted.

 

[Fraserb]

This is the sensor we use, I'm getting a price for one of them but they're pretty pricey, the dairy engineer says it's a reflected light sensor and to Google for one of the..

 

[Alan Reynolds]

Would a microwave sensor work? Like the units you can fit to led batten lights etc. they trip when they detect movement and have multiple dip switches to give different settings.
Like the unit they use that switch lights on, one after another as you walk down a corridor

 

[brightspark]

Would a microwave sensor work? Like the units you can fit to led batten lights etc. they trip when they detect movement and have multiple dip switches to give different settings.
Like the unit they use that switch lights on, one after another as you walk down a corridor

depends on how fast it needs to trigger before the next activation . standard pir for lights arent exactly fast even on minimum setting. probably about 8 seconds

 

[Alan Reynolds]

Would a microwave sensor work? Like the units you can fit to led batten lights etc. they trip when they detect movement and have multiple dip switches to give different settings.
Like the unit they use that switch lights on, one after another as you walk down a corridor

Just looked on Amazon. 12 volt microwave sensors for about £20.

 

[Alan Reynolds]

depends on how fast it needs to trigger before the next activation . standard pir for lights arent exactly fast even on minimum setting. probably about 8 seconds

Minimum on microwave sensors is about 8 seconds. You could probably rework the circuit to drop it lower.

 

[gaz1]

if you want your own just build it

Arduino - Motion Sensor - Relay | Arduino Tutorial

Learn how to use motion sensor to control relay, motion sensor triggers light. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. Find this and other Arduino tutorials on ArduinoGetStarted.com.

arduinogetstarted.com

there is other ways to build it the main point is the relay to control something else

 

[s410man]

After speaking with a very knowledgeable bloke at ifm yesterday (thank you @Robotstar5 ) i think I've decided on a ultrasonic sensor

He was worried about reaction times and reliability with a pir type sensor he said light conditions and size of object will effect how it reacts

They're ultrasonic sensor is ip67 rated and vibration proof aswell only snag is it's £160!

Can also be programmed to be normally opened or closed and the sensing distance can be adjusted to make sure i don't pick up the far wall rattling back and forth and setting it off

Also has a 5 year warranty and i am going for a good quality build here hopefully as as pointed out earlier it will be working in a harsh environment!

 

[Agroshield]

After speaking with a very knowledgeable bloke at ifm yesterday, I think I've decided on a ultrasonic sensor

Find the model number and look on AliBang or Chinabay for a lookalike. Buy 4 and you still won't reach the price of the genuine one. If the first one fails too soon, you will have time to buy a better one before the last one fails.

Put the model number and 'alternative' into Google and see what pops up.

Mr AVE calls this stuff 'industrial Lego' and he is correct. Just like 57 different companies make baked beans, there will be more than one IP67 ultrasonic sensor on the market.

 

[s410man]

Find the model number and look on AliBang or Chinabay for a lookalike. Buy 4 and you still won't reach the price of the genuine one. If the first one fails too soon, you will have time to buy a better one before the last one fails.

Put the model number and 'alternative' into Google and see what pops up.

Mr AVE calls this stuff 'industrial Lego' and he is correct. Just like 57 different companies make baked beans, there will be more than one IP67 ultrasonic sensor on the market.

Yes there is that but then i may need some technical help aswell on this project and i hate it when people ring me and i spend half a hour explaining all the pros and cons and then find out they ordered somewhere £1 cheaper!

I'm not looking to cheap out on this really it will be used by farmers in tough conditions and I'd like them to get a good name for reliability hopefully!

 

[Justme]

Done properly it will last absolutely fine - the problem is very very very few people do it properly. Electronics are the easy way to save money in a lot of things thus they don't get done properly.

As an example my old department had built a system that saw temperature cycles from -20°C to 85°C daily, was running flat out (large signal processing system) for 10 years (when I left) without a single error or problem, nor any downtime in those 10 years.

How many times was it moved in a day, hit by tractors, got **** and ****** on, left out in rain for months of the year, bounced over fields on trailers with limited suspension ect ect.