Robotics 1
Analog Sensors
Quiz
Your ID Code:
Question 2: Suppose that I have a potentiometer with a total resistance (between the A and B pins) of 10k ohms. And, suppose that I am supplying 5V to the A pin. When there is 2k ohms of resistance between the A pin and the wiper, what voltage will there be at the wiper? Round to two decimal places.
Question 3: If we are going to store an analog value in a 16-bit number, what is the largest number we could represent with those 16 bits? Your answer should be an integer.
Question 4: Suppose I have a 16-bit value of 1101011100011010, what digital value does this represent? Your answer should be an integer.
Question 5: Suppose that I have an analog to digital converter where the input can range from 0V to 5V, and suppose I am reading the analog value into an 8-bit number. When the 8-bit number we read is 11010110, what is the voltage at the input? Round to 3 decimal places.
Question 6: Suppose that for question 5, the analog value at the input is 2.3V. What is the 8-bit byte that will be read? Your answer should be a string of bits, containing only 0's and 1's.
Question 7: If our input range is 0-8V and we are reading the input value into a 10-bit value, what is the quantization value, Q? Round to four decimal places.
Question 8: For question 7, now suppose we are storing the value as a 12-bit values. Now what is the quantization value, Q? Round to five decimal places.
Question 9: For question 7, what is the angle resolution if we are reading a potentiometer that can make one complete revolution? Round to three decimal places.
Question 10: For question 8, what is the angle resolution if we are reading a potentiometer that can make one complete revolution? Round to four decimal places.
Undergraduate/Graduate Questions (both undergraduates AND graduates should answer these questions):
Question 11: If your sensor has nonlinearity error, which of the following is also true?
Question 12: Which of the following is NOT true of sensor sensitivity?
Suppose that you are testing 4 different load cells, and you apply a force of 10 Newtons to each load cell, and use the sensor response curve to read the force output. You repeat the test 5 times, obtaining the data shown below. Questions 13-15 refer to this test data.
Question 13: Which load cell is very precise, but not very accurate?
Question 15: Which load cell is both accurate and precise?
Question 1: In a potentiometer, which pin do we use to read the rotational angle?
The A pin
The wiper
The B pin
The ground pin
Graduate Questions (ONLY graduates need to answer these questions):
The sensor has a variable sensitivity
The sensor sensitivity is a constant
The sensor is not very accurate
The sensor is not very precise
Sensor sensitivity is the slope on a sensor response curve
Sensor sensitivity is the amount that the output changes for a given change in the input
Sensor sensitivity is greater for more precise sensors
Sensor sensitivity can either be constant or variable
Load Cell 1
Load Cell 2
Load Cell 3
Load Cell 4
Load Cell 1
Load Cell 2
Load Cell 3
Load Cell 4
Question 14: Which load cell is very accurate but not very precise?
Load Cell 1
Load Cell 2
Load Cell 3
Load Cell 4