0:00:05 > 0:00:08# If you've got a question and you don't know where to go
0:00:08 > 0:00:11# Ask Nina for some help, cos she's got a science show
0:00:11 > 0:00:14# She makes sense of her senses while helping all her fans
0:00:14 > 0:00:17# By doing her experiments with potions and with bangs
0:00:17 > 0:00:19- # Touch your tongue - Tongue!
0:00:19 > 0:00:20- # Fingers - Fingers!
0:00:20 > 0:00:23- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:23 > 0:00:26# Nina And The Neurons find out what you need to know
0:00:26 > 0:00:29# Nina And The Neurons find out what you need to know
0:00:29 > 0:00:32# Luke, he helps us with our eyes and Felix with our touch
0:00:32 > 0:00:35# Ollie sniffs out smells and Belle, she hears so much
0:00:35 > 0:00:38# Bud is Ollie's brother, he helps us with our taste
0:00:38 > 0:00:41# They're Nina's little neurons And they're coming to your place!
0:00:41 > 0:00:43- # Touch your tongue - Tongue!
0:00:43 > 0:00:44- # Fingers - Fingers!
0:00:44 > 0:00:47- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:47 > 0:00:50# Nina And The Neurons find out what you need to know
0:00:50 > 0:00:53# Nina And The Neurons find out what you need to know
0:00:53 > 0:00:54# Oh yeah! #
0:00:57 > 0:00:58Oh, hello!
0:00:58 > 0:01:02I'm fixing my cupboard door. It wasn't opening properly.
0:01:02 > 0:01:06But a new hinge and some oil has done the trick!
0:01:06 > 0:01:09BEEPING
0:01:09 > 0:01:13I hear a beep, I see a flash! I wonder what they're going to ask!
0:01:18 > 0:01:20BOTH: Hi, Nina!
0:01:20 > 0:01:21Hi, guys!
0:01:21 > 0:01:26We've got a question for you. How do automatic doors know when to open?
0:01:26 > 0:01:28That's a GREAT question!
0:01:28 > 0:01:31How do automatic doors know when to open?
0:01:31 > 0:01:33Automatic doors are a good invention,
0:01:33 > 0:01:36you might use them at the supermarket!
0:01:36 > 0:01:39They open and close without you having to touch them!
0:01:39 > 0:01:43Come to the science centre and we'll investigate.
0:01:43 > 0:01:44BOTH: Bye!
0:01:44 > 0:01:45Bye!
0:01:45 > 0:01:48I'm going to need help to answer this,
0:01:48 > 0:01:49and I know just who to ask.
0:01:49 > 0:01:52Ok, Neurons, time to get to work!
0:02:08 > 0:02:11ALL: Neurons at the ready, Nina!
0:02:12 > 0:02:16OK, today's question is, how do automatic doors know when to open?
0:02:16 > 0:02:20Which neuron do you think will be useful in finding the answer?
0:02:20 > 0:02:23ALL: Me! Me, me, me!
0:02:23 > 0:02:26Will it be fabulous Felix?
0:02:26 > 0:02:30I can help so very much, if you need the sense of touch!
0:02:30 > 0:02:32Will it be beautiful Belle?
0:02:32 > 0:02:37I send messages to brain from ear, if there's a sound I'll help you hear!
0:02:37 > 0:02:38Will it be lovely Luke?
0:02:38 > 0:02:41For looking and seeing, day or night,
0:02:41 > 0:02:43I'll help you with your sense of sight.
0:02:43 > 0:02:45Will it be awesome Ollie?
0:02:45 > 0:02:48If it's pongy or whiffy but you can't tell,
0:02:48 > 0:02:50my messages help your sense of smell.
0:02:50 > 0:02:51Or will it be baby Bud?
0:02:51 > 0:02:57Sour, salty, bitter or sweet! I'm your taste buddy whenever you eat!
0:03:01 > 0:03:02It's Luke!
0:03:02 > 0:03:03Yes!
0:03:03 > 0:03:07ALL: Go, Luke! Go, Luke! Go, Luke!
0:03:07 > 0:03:11ALL: Go, Luke! Go, Luke! Go, Luke! Go, Luke!
0:03:11 > 0:03:13Cool, Nina!
0:03:13 > 0:03:15I'll be looking out to help you!
0:03:15 > 0:03:19Today's question is, how do automatic doors know when to open?
0:03:19 > 0:03:22Now, we can SEE automatic doors opening, so,
0:03:22 > 0:03:24Luke will be helping us today.
0:03:24 > 0:03:26Stand by, Neurons. I may need you all!
0:03:26 > 0:03:30I need to get the workshop ready for the inventors!
0:03:32 > 0:03:36Gordon and Christopher want to know about automatic doors.
0:03:36 > 0:03:40They close shut, they open wide, how do they know when to let us inside?
0:03:40 > 0:03:42So today, for one day only,
0:03:42 > 0:03:45Gordon and Christopher become the inventors!
0:03:47 > 0:03:48Hi, guys!
0:03:48 > 0:03:49BOTH: Hi, Nina.
0:03:49 > 0:03:53Thank you for coming today! And your question was,
0:03:53 > 0:03:56how do automatic doors know when to open? Why do you want to know?
0:03:56 > 0:04:01When we go to the supermarket, we like to try and sneak up on them.
0:04:01 > 0:04:03But they always know and open up!
0:04:03 > 0:04:08There's some automatic doors behind us! Let's give it a go!
0:04:14 > 0:04:15You got caught! Come back!
0:04:16 > 0:04:18Oh! Ha-ha!
0:04:18 > 0:04:22It's no use, Nina, those doors are too clever!
0:04:22 > 0:04:24You're right, Luke.
0:04:24 > 0:04:30And I think it's got something to do with that thing above the door.
0:04:30 > 0:04:33To find out about how automatic doors know when to open,
0:04:33 > 0:04:35let's go to the workshop!
0:04:36 > 0:04:40Taking things apart is my job. It can be dangerous,
0:04:40 > 0:04:41so don't do this yourself.
0:04:41 > 0:04:46That's right. Nina's been specially trained to do this.
0:04:46 > 0:04:47If you take things apart,
0:04:47 > 0:04:51you might not be able to put them back together!
0:04:51 > 0:04:54Now this is a sensor.
0:04:54 > 0:04:55Let's have a look inside.
0:04:55 > 0:04:59And does that sense when people's coming, Nina?
0:04:59 > 0:05:03That's right, most automatic doors have these sensors above them.
0:05:03 > 0:05:08So a sensor is an object that senses things. Just like we use our senses.
0:05:08 > 0:05:09We have five senses
0:05:09 > 0:05:13but an automatic door only has one sensor.
0:05:13 > 0:05:16And it's called an infra-red sensor.
0:05:16 > 0:05:21So to find out what an infra-red sensor does, let's do an experiment!
0:05:21 > 0:05:24Do you think an automatic door can tell the difference
0:05:24 > 0:05:28- between a real person and a cardboard one?- No.
0:05:28 > 0:05:30I'd like you to meet a friend of mine!
0:05:32 > 0:05:33Cardboard Nina!
0:05:33 > 0:05:36So let's go and see if she can open the doors!
0:05:36 > 0:05:37Let's go!
0:05:39 > 0:05:42Ready...steady...
0:05:42 > 0:05:45Oh, no! I think we're heading for a...
0:05:45 > 0:05:46THUD
0:05:46 > 0:05:48Crash!
0:05:48 > 0:05:51Oh, dear! The doors didn't open for cardboard Nina!
0:05:51 > 0:05:53Let ME walk towards them.
0:05:57 > 0:06:00Oh! But they opened for me!
0:06:00 > 0:06:03Hmm! The automatic doors can tell the difference
0:06:03 > 0:06:06between a cardboard person and a real person!
0:06:06 > 0:06:10And that's because their infra-red sensor can see heat.
0:06:10 > 0:06:14See heat? Surely you mean feel heat, Nina?
0:06:14 > 0:06:18No. People feel heat with their skin if they touch something warm,
0:06:18 > 0:06:21an infra-red sensor is different.
0:06:21 > 0:06:23It can see heat from a distance.
0:06:23 > 0:06:26And because people's bodies are warm,
0:06:26 > 0:06:30the sensor can see people coming and open the door!
0:06:30 > 0:06:32And I know something very big and exciting
0:06:32 > 0:06:34that can see heat from a distance.
0:06:34 > 0:06:37Shall we go and see another invention?
0:06:37 > 0:06:39- BOTH: Yeah!- Let's go!
0:06:44 > 0:06:48Look at them go! I wonder where they'll end up today.
0:06:48 > 0:06:53Oh, what's big and exciting and uses infra-red sensors?
0:06:53 > 0:06:56Hmm. That's a difficult one.
0:06:56 > 0:06:58I really don't know!
0:06:58 > 0:07:02Oh, OH! I think we've arrived!
0:07:05 > 0:07:08So, THIS is the invention we've come to see!
0:07:08 > 0:07:10A helicopter!
0:07:10 > 0:07:12But it's a very special helicopter.
0:07:12 > 0:07:15It's a search and rescue helicopter.
0:07:15 > 0:07:17If people get lost in the snow or the mountains,
0:07:17 > 0:07:20a helicopter like this helps them.
0:07:20 > 0:07:22How does it know where to look?
0:07:22 > 0:07:24Well, let's do an experiment.
0:07:24 > 0:07:27Around here, one of the search and rescue team are hiding.
0:07:27 > 0:07:28Can you see them?
0:07:34 > 0:07:36I can't see anyone!
0:07:36 > 0:07:38It's difficult!
0:07:38 > 0:07:41But, there's something very useful on the helicopter!
0:07:49 > 0:07:53We're going to look at pictures from a thermal-imaging camera,
0:07:53 > 0:07:56which is mounted outside of the helicopter,
0:07:56 > 0:07:59and it can see heat, just like an automatic door can!
0:07:59 > 0:08:02On the screen we can see things that are cold
0:08:02 > 0:08:05and things that are warm, like people.
0:08:05 > 0:08:09So the more red something looks, the warmer it is.
0:08:09 > 0:08:13And the more blue something looks, the colder it is.
0:08:13 > 0:08:15Like this stuff here!
0:08:26 > 0:08:27So, what can you see?
0:08:27 > 0:08:29There's something red there!
0:08:29 > 0:08:31So there is!
0:08:31 > 0:08:36And I think this red blob is our search and rescue person!
0:08:36 > 0:08:37Well done, inventors!
0:08:37 > 0:08:39That's pretty amazing.
0:08:39 > 0:08:41Being able to tell where the person is
0:08:41 > 0:08:44by looking at the colours on the screen.
0:08:51 > 0:08:55So, the thermal imaging camera can see something we can't.
0:08:55 > 0:08:57Heat. Just like an automatic door.
0:08:57 > 0:09:01This means the search and rescue teams can find people who are lost.
0:09:01 > 0:09:04Let's go back to the workshop and get inventing.
0:09:06 > 0:09:10Wow! Those inder...infer...
0:09:10 > 0:09:12Infra-red, Bud!
0:09:12 > 0:09:15Yeah! Infra-red sensors are really cool.
0:09:15 > 0:09:19They help find people and open doors, too.
0:09:19 > 0:09:22But who actually invented automatic doors?
0:09:22 > 0:09:26Well, listen up! I can tell you that.
0:09:27 > 0:09:29Over 50 years ago,
0:09:30 > 0:09:35Lew Hewitt and Dee Horton noticed that they had lots of trouble
0:09:35 > 0:09:40opening and closing ordinary doors on very windy days.
0:09:40 > 0:09:45So the two men put their heads together, and had a think.
0:09:45 > 0:09:47The next thing they knew,
0:09:47 > 0:09:50they had invented the first ever automatic door.
0:09:50 > 0:09:53What a pair!
0:09:59 > 0:10:02So, you asked, how do automatic doors know when to open?
0:10:02 > 0:10:06And so far we've found out that most automatic doors
0:10:06 > 0:10:10have infra-red sensors that can see warm things like people.
0:10:10 > 0:10:13When they see the warm things, they open the doors.
0:10:13 > 0:10:17So let's get inventing and make our very own automatic doors!
0:10:17 > 0:10:20The first thing we need to do is take the lid off the box.
0:10:22 > 0:10:24We'll take a plastic bottle,
0:10:24 > 0:10:27and draw around the bottom of the bottle.
0:10:29 > 0:10:33Take some scissors, and let's cut along the lines.
0:10:35 > 0:10:37Next we'll take one of our bottles,
0:10:37 > 0:10:39turn it upside down,
0:10:39 > 0:10:42and push it through. Yeah, that's it!
0:10:42 > 0:10:45Excellent. And the same with the other one.
0:10:45 > 0:10:47Can I have a paper fastener?
0:10:47 > 0:10:49Pop the first one in.
0:10:50 > 0:10:54Next we're going to take an elastic band,
0:10:54 > 0:10:59and hook it on to the paper fastener at the back.
0:11:00 > 0:11:03And then pull your string around the bottle,
0:11:03 > 0:11:07bring it right round, then wrap it round the paper fastener.
0:11:09 > 0:11:11This is going to be our wall.
0:11:11 > 0:11:13And this is going to be our door.
0:11:20 > 0:11:25Going to hook the door underneath the string,
0:11:25 > 0:11:26like that.
0:11:26 > 0:11:28More sticky tape.
0:11:31 > 0:11:33Now, it's time to test it out!
0:11:33 > 0:11:35There's a mini-Nina for you.
0:11:35 > 0:11:40Now, let's see if Nina can walk towards the door,
0:11:40 > 0:11:42oh! And she catches on the string.
0:11:46 > 0:11:49Hey! It works, so well done, inventors,
0:11:49 > 0:11:53we've made our very own automatic doors!
0:11:53 > 0:11:56# Nina And The Neurons! #
0:11:58 > 0:12:02So, your question was, how do automatic doors know when to open?
0:12:02 > 0:12:04And I think we've answered it!
0:12:04 > 0:12:07We found out that most automatic doors have a sensor,
0:12:07 > 0:12:10that tells the door when people are coming,
0:12:10 > 0:12:13and the sensor is called an infra-red sensor
0:12:13 > 0:12:14and it can see heat.
0:12:14 > 0:12:16And because our bodies are warm,
0:12:16 > 0:12:20the sensor can tell we're real people and will open the door!
0:12:20 > 0:12:23Thank you very much for your fab question!
0:12:23 > 0:12:25- BOTH: Bye!- Bye!
0:12:30 > 0:12:33If you want to make today's invention,
0:12:33 > 0:12:36just go to the Nina section on the CBeebies website.
0:12:36 > 0:12:38That has the instructions to make your own.
0:12:38 > 0:12:42Or, you may have other ideas on what to invent.
0:12:43 > 0:12:45- Bikes!- Skates!- Binoculars!
0:12:45 > 0:12:49- Televisions!- Speakers!- And cars!
0:12:49 > 0:12:51# We all love inventing
0:12:51 > 0:12:54# Ooh oh oh oooh-ooh
0:12:54 > 0:12:55ALL: # Love inventing
0:12:55 > 0:12:57# We all love inventing
0:12:57 > 0:13:00# Why don't you try it too?
0:13:01 > 0:13:03# Inventions make life easier
0:13:03 > 0:13:05# And help us get things done
0:13:05 > 0:13:07# Go inventing
0:13:07 > 0:13:10# I always like to take a look
0:13:10 > 0:13:12# At how they work and run
0:13:12 > 0:13:13# Go inventing!
0:13:13 > 0:13:15# We all love inventing
0:13:15 > 0:13:19# Oooh oooh ooh, go inventing
0:13:19 > 0:13:21# We all love inventing
0:13:21 > 0:13:24# Why don't you try it too? #
0:13:25 > 0:13:28Oh, it's been such a great day, man!
0:13:28 > 0:13:32Seeing those automatic doors opening and closing
0:13:32 > 0:13:34when anyone went near them.
0:13:34 > 0:13:36I've had a fabby day!
0:13:36 > 0:13:39The best bit was when the door wouldn't open for Nina!
0:13:39 > 0:13:42Cardboard Nina, that is!
0:13:42 > 0:13:44It's been a marvellous day.
0:13:44 > 0:13:48It was good to see how the infra-red detector can see heat
0:13:48 > 0:13:49rather than feel it.
0:13:49 > 0:13:52I really enjoyed myself today.
0:13:52 > 0:13:56My favourite part was when everyone made their own automatic doors.
0:13:56 > 0:13:59They worked really well.
0:13:59 > 0:14:00Open sesame!
0:14:01 > 0:14:03Our day's been bursting with inventions!
0:14:03 > 0:14:07I hope you've enjoyed it! See you again soon, bye!
0:14:07 > 0:14:09ALL: Bye!