Microcontroller homework Week 05 Question 1. Treshold, sensitivity, range, linearity, accuracy, precision, stability, hysteresis, noise Question 2. Assuming Rh= 9kΩ Vo=0.381V Question 3. A) RS=100 Ω B) RS=212,464 Ω Question 4. A) B) R1 = 16,67 kΩ C) D) E) RF = 10k, RL = 282k, RH = 107k F) Without scaling: 2.35 steps/°C. With scaling: 3.42 steps/°C
Microcontroller homework for week 05 1. Treshold, sensitivity, (full) range, linearity, accuracy, precision, stability, hysteresis, noise 2. VO = RH/(RT+RH) = 0.381356 V 3. A) 100 B) 212,464 4. A) B) R1 = 16,67 k C) D) E) RF = 10k, RL = 28k2, RH = 107k F) Before scaling: 2.35 steps/°C. After scaling: 3.42 steps/°C 5
Question 1 Name 9 characteristic parameters of sensors. Treshold, noise, range, stability, linearity, accuracy, precision, sensitivity, hysteresis Question 2 Given the circuit below (using a SYH-2R humidity sensor) determine the output voltage for a relative humidity of 70 % at 30 °C if R T = 50 kΩ and VDD= 2.5 V. R70 30 c =R H =9,2 kV RH 9,2 k V O= ∙ V DD= ∙ 2,5 = 0,388 V (R T + R H ) ( 50 k +9,2 k ) Hint: Check specification for Humidity Sensor of SYH-2R.pdf at http://www.rhopointcomponents.com/images/SYH-2R.pdf
Question 1 Name 9 characteristic parameters of sensors. Solution: 1. Thershold. 2. Sensitivity. 3. Full Range. 4. Linearity. 5. Accuracy. 6. Precision. 7. Stability. 8. Hysteresis. 9. Noise. Question 2 Given the circuit below (using a SYH-2R humidity sensor) determine the output voltage for a relative humidity of 70 % at 30 °C if RT = 50 kΩ and VDD= 2.5 V. Solution: Check specification for Humidity Sensor of SYH-2R.pdf at: http://www.rhopointcomponents.com/images/SYH-2R.pdf 2 Week 04 Homework - Solutions Check Thermistor - Wikipedia.pdf at http://en.wikipedia.org/wiki/Thermistor
when no magnetic field is present. When a north pole is near the sensor, the voltage moves toward ground, and when a south pole is near the sensor the voltage moves toward the positive supply. Hall effect switches produce a digital output to indicate the presence of a magnetic field. They drive the output active when a certain magnetic strength (the operate point) is sensed, then drive the output inactive when the magnetic field drops below a certain level (the release point). There is some hysteresis in the range, where the release point is less than the operate value. 82 Analog Interfacing to Embedded Microprocessors Figure 3.24 The Hall effect. Hall effect switches come in two varieties: unipolar and bipolar, which are sometimes called nonlatching and latching. Bipolar switches have a positive (south pole) operate point and a negative (north pole) release point. Unipo-
abil fikseerida ilma lisaseadmeteta Tundlikkuse läveks (ingl threshold ) loetakse eraldusvõimet, mis on kindlaks tehtud sisendsignaali suurendamisel alates selle nullväärtusest. Seega määrab eraldusvõime sisendsignaali väikseima fikseeritava muutuse, tundlikkuse lävi aga sisendsignaali minimaalse mõõdetava väärtuse. Lineaarsus (ingl linearity) on kalibreerimiskõvera kuju lähedus valitud sirgele. 5. Hüstereesi nähtus diskreetväljundi korral Hüstereesi (ingl hysteresis) mõiste on seotud mõõteseadme väljundsignaali või mõõtetulemuse erinevusega sõltuvalt sellest, kas see tulemus on saadud sisendsignaali väärtuste suurenemise või vähenemise protsessis (joonis 1.27). See efekt on sarnane ferromagnetiliste materjalide magnetiseerumisele ning sõltub näiteks hõõrdetakistusest, konstruktiivsete elementide mehaanilisest elastsusest, elektrilisest mahtuvusest jne
Connectors tightened with correct torque, no more no less Low PIM jumper cables with soldered connectors Use all connectors and tools from the same manufacture No mechanical stress on RF parts All RF interconnections cleaned as specified by the manufacturer 66.Mis põhjustab passiivset ristmodulatsiooni (PIM – Passive Intermodulation) Põjustajad: Poor mechanical junction in the RF path; RF components with materials which exhibit some level of hysteresis (eg. Stainless steel) Contaminated surfaces or contacts within the RF path. (metallic particle, „rusty bolt noise“, nearby metallic objects) Problem in combiner systems High power carriers (more than 20W, 48dBm) Multioperator systems Power Density Non-linearities Signals mixing 67. Millist järku passiivne ristmodulatsioon on kõige olulisem ja miks 68. Signaal faasorkujul, Konstellatsioonidiagramm
Mitte lineaarsus (Non-linearity) (Accuracy) Lineaarsus Hõõrdumine Lõtk Hüsterees Täitur mm (Linearity) (Friction) (Backlash) (Hysteresis) AV ja VV mootor A B-C B-C B-C 0,005...100 Sammmootor A B-C B-C B-C 0,01...50 Hüdrauliline silinder C 0,01...100 Pneumaatiline silinder C 0,1...100
signals and that their solution could be of great value. He promptly undertook the task. Ewing was then 59, a short, thickset Scot with blue eyes beneath shaggy eyebrows, a quiet voice, and the manner of a benign physician. He had been knighted three years before for his contributions to science, which included pioneering studies of Japanese earthquakes, of magnetism, and of mechanical lagging effects in stressed materials (now known by a word he coined, "hysteresis"), and for his public services, notably his naval education directorship. He was to become president of the British Association for the Advancement of Science and perhaps his country's greatest living expert on mechanical science. And now he was about to found a cryptanalytic bureau that was to become almost legendary and to exert a direct and noticeable effect upon the course of history. He began by boning up on ciphers in the stacks of the British
tissue that can be added as homogenized For economical reasons, nonmeat ingredi- rind or dried powder. It should be noted, ents are also added to sausages. There is also however, that collagen, once dissolved, a wide range of other ingredients that are slowly forms a gel at lower temperatures added to increase water and fat holding; (20–30°C), but the gel melts at 45–59°C some of them are gelling agents, while others (hysteresis) (Puolanne and Ruusunen 1981). are thickeners. Milk powder, caseinate, and This behavior is somewhat similar for fat, but soy protein hold water as well as have emul- other proteins do not behave like this. sifying properties. Potato flour, carrageenan, Sausages may also contain edible byprod- and other polymers are added to hold water. ucts, like liver, tongue, blood or blood Various plant materials are added for flavor
annaabi.ee 
