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Author SHA1 Message Date
Øyvind Skaaden c8d5ad886a Change layout 2021-01-11 17:53:45 +01:00
Øyvind Skaaden eb2aca2e67 Finish lecture 1 ttt4280 2021-01-11 17:53:39 +01:00
Øyvind Skaaden 6feef1b8ed Start lecture 1 in TTT4280 2021-01-11 12:27:56 +01:00
Øyvind Skaaden cd1118104a Fixed typo 2021-01-11 12:26:26 +01:00
Øyvind Skaaden be2cddf0f7 Restructure of files 2021-01-11 12:25:56 +01:00
82 changed files with 144 additions and 48 deletions

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# Våren 2021
-
name: Våren 2021
href: 21v
courses:
-
course: ttt4280
desc: Sensorer og instrumentering, våren 2021.
updated: 2021-01-11
# Høsten 2020
-
course: tfe4152
desc: Design av integrerte kretser, høsten 2020.
updated: 2020-12-16
href: tfe4152/summary
-
course: ttt4120
desc: Digital signalbehandling, høsten 2020.
updated: 2020-12-06
href: ttt4120/summary
-
course: mfel3010
desc: Medisin for teknologi- og realfagsstudenter, høsten 2020.
updated: 2020-11-25
href: mfel3010/summary
-
course: tfe4146
desc: Halvlederkomponenter, høsten 2020.
updated: 2020-11-23
href: tfe4146/summary
-
name: Høsten 2020
href: 20h
courses:
-
course: tfe4152
desc: Design av integrerte kretser, høsten 2020.
updated: 2020-12-16
href: tfe4152/summary
-
course: ttt4120
desc: Digital signalbehandling, høsten 2020.
updated: 2020-12-06
href: ttt4120/summary
-
course: mfel3010
desc: Medisin for teknologi- og realfagsstudenter, høsten 2020.
updated: 2020-11-25
href: mfel3010/summary
-
course: tfe4146
desc: Halvlederkomponenter, høsten 2020.
updated: 2020-11-23
href: tfe4146/summary
# Våren 2020
-
course: ttt4270
desc: Elektronisk systemdesign, prosjekt, våren 2020.
updated: 2020-05-05
-
name: Våren 2020
href: 20v
courses:
-
course: ttt4270
desc: Elektronisk systemdesign, prosjekt, våren 2020.
updated: 2020-05-05
# Høsten 2019
-
course: ttt4265
desc: Elektronisk systemdesign og -analyse II, høsten 2019.
updated: 2019-12-02
-
course: tdt4160
desc: Datamaskiner og digitalteknikk, høsten 2019.
updated: 2019-11-28
-
name: Høsten 2019
href: 19h
courses:
-
course: ttt4265
desc: Elektronisk systemdesign og -analyse II, høsten 2019.
updated: 2019-12-02
-
course: tdt4160
desc: Datamaskiner og digitalteknikk, høsten 2019.
updated: 2019-11-28
# Våren 2019
-
course: ttt4260
desc: Elektronisk systemdesign og -analyse I, våren 2019.
updated: 2019-05-05
-
course: tma4105
desc: Matematikk 2, våren 2019.
updated: 2019-05-21
-
course: tdt4102
desc: Prosedyre og objektorientert programmering, våren 2019.
updated: 2019-05-15
-
name: Våren 2019
href: 19v
courses:
-
course: ttt4260
desc: Elektronisk systemdesign og -analyse I, våren 2019.
updated: 2019-05-05
-
course: tma4105
desc: Matematikk 2, våren 2019.
updated: 2019-05-21
-
course: tdt4102
desc: Prosedyre og objektorientert programmering, våren 2019.
updated: 2019-05-15

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---
title: "TTT4280 - Måleusikkerhet"
description: "2021-01-11"
math: true
---
## Faglig innhold
* Måleusikkerhet
* Støyanalyse
* Sensorer og aktuatorer
* Sensortyper
## Hva er sensorer
Noe som kan lese den fysiske verdenen til noe vi kan prosessere.
Finnes mange forskjellige sensorer. Flere i biler, telefoner, klokker osv.
Tidligere ble det estimert at vi skulle ha ca 50 milliarder sensorer i 2020.
## Måleusikkerhet
Bruk av sensor = Utføre en måling.
...og måleverdier har en usikkerhet.
I visse situasjoner har måleusikkerheten masse å si, i andre har det ikke så mye å si.
Sensitivitet er en måling for å ikke gjøre en Type II feil (alarmen løser **ikke** ut).
Spesifisitet er en måling for å ikke gjøre en Type I feil (**falsk** alarm).
### Grunnmodell for måleprosess
![Grunnmodell](figures/grunnmodell.jpg)
I realiteten er det støy i alle ledd.
Sannsynligheten for at et sensorsystem gir riktig svar påvirkes av (minst) to faktorer:
* Hvor entydig er underliggende sammenhenger?
* Hvor nøyaktig kan vi måle de fysiske størrelsene?
$$ \text{SNR} = \frac{\text{(Effekten for) sann verdi}}{\text{(Effekten for) støy}} $$
### Målefeil
Stokastiske feil (Type A feil) påvirker målingens *presisjon*.
Presisjonen beskriver hvor reproduserbar en måling er.
Systematiske feil (Type B feil) påvirker målingens *sannhet*.
Sannheten er en måling på hvor langt unna den sanne verdien en måling er.
![Målefeil](figures/true-prec.jpg)

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---
layout: layouts/list
title: "TTT4280"
description: "Sensorer og instrumentering"
---
## Forelesninger
[2021-01-11](./lectures/2021-01-11/) - Intro og målesikkerhet

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@ -4,13 +4,15 @@ title: "NTNU"
description: "Alt som har med studier på NTNU å gjøre."
---
{% assign courses = site.data.ntnu-courses | sort: 'update' %}
{% for semester in site.data.ntnu-courses %}
<h2>{{ semester.name }}</h2>
{% assign courses = semester.courses | sort: 'update' %}
<div class="row row-cols-1 row-cols-md-3">
{% for course in courses %}
<div class="col mb-4">
<div class="card h-100">
<div class="card-body">
<h5 class="card-title no-anchor" data-toc-skip><a href="{% if course.href %}{{ course.href }}{% else %}{{ course.course }}{% endif %}">{{ course.course | upcase }}</a></h5>
<h5 class="card-title no-anchor" data-toc-skip><a href="{{ semester.href }}/{% if course.href %}{{ course.href }}{% else %}{{ course.course }}{% endif %}">{{ course.course | upcase }}</a></h5>
<p class="card-text">{{ course.desc }}</p>
</div>
<div class="card-footer">
@ -19,4 +21,5 @@ description: "Alt som har med studier på NTNU å gjøre."
</div>
</div>
{% endfor %}
</div>
</div>
{% endfor %}