A fluid system has two sensors, a pressure sensor and a flow sensor. The pressure sensor has one output ‘A’ defining two levels: ‘0’ if pressure is low, and ‘1’ if pressure is high. The flow sensor has one output ‘B’ defining two levels: ‘0’ if flow is low, and ‘1’ if flow is high. There is another output ‘C’ defining the command from operator: ‘0’ if less flow is required, and ‘1’ if more flow is required. The combination of all outputs is used to decide if a pump should be turned on ‘P=1’ if pressure is low, or if operator command is high and flow is low. Otherwise, the pump should be turned off ‘P=0’. You are assigned the task to design the circuit that makes this decision. (3-a) Is this an analogue or digital electronic problem? Explain the difference. (3-b) What is the benefit of using digital circuits for the abovementioned scenario? Explain
A fluid system has two sensors, a pressure sensor and a flow sensor. The pressure sensor has one output ‘A’ defining two levels: ‘0’ if pressure is low, and ‘1’ if pressure is high. The flow sensor has one output ‘B’ defining two levels: ‘0’ if flow is low, and ‘1’ if flow is high. There is another output ‘C’ defining the command from operator: ‘0’ if less flow is required, and ‘1’ if more flow is required. The combination of all outputs is used to decide if a pump should be turned on ‘P=1’ if pressure is low, or if operator command is high and flow is low. Otherwise, the pump should be turned off ‘P=0’. You are assigned the task to design the circuit that makes this decision. (3-a) Is this an analogue or digital electronic problem? Explain the difference. (3-b) What is the benefit of using digital circuits for the abovementioned scenario? Explain
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter13: Heating Control Devices
Section: Chapter Questions
Problem 30RQ
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Question
A fluid system has two sensors, a pressure sensor and a flow sensor.
The pressure sensor has one output ‘A’ defining two levels: ‘0’ if pressure is low, and ‘1’ if
pressure is high.
The flow sensor has one output ‘B’ defining two levels: ‘0’ if flow is low, and ‘1’ if flow is high.
There is another output ‘C’ defining the command from operator: ‘0’ if less flow is required, and
‘1’ if more flow is required.
The combination of all outputs is used to decide if a pump should be turned on ‘P=1’ if pressure is
low, or if operator command is high and flow is low. Otherwise, the pump should be turned off
‘P=0’. You are assigned the task to design the circuit that makes this decision.
(3-a) Is this an analogue or
(3-b) What is the benefit of using digital circuits for the abovementioned scenario? Explain
(3-e) Draw the circuit diagram for the given scenario, then verify its operation using Multisim.
Transcribed Image Text:Activity 3:
A fluid system has two sensors, a pressure sensor and a flow sensor.
The pressure sensor has one output 'A' defining two levels: '0' if pressure is low, and '1' if
pressure is high.
The flow sensor has one output 'B' defining two levels: '0' if flow is low, and '1' if flow is high.
There is another output 'C' defining the command from operator: '0' if less flow is required, and
'1' if more flow is required.
The combination of all outputs is used to decide if a pump should be turned on 'P=1' if pressure is
low, or if operator command is high and flow is low. Otherwise, the pump should be turned off
'P=0'. You are assigned the task to design the circuit that makes this decision.
(3-a) Is this an analogue or digital electronic problem? Explain the difference.
(3-b) What is the benefit of using digital circuits for the abovementioned scenario? Explain.
(3-c) Apply your knowledge of Boolean logic to form the truth table.
(3-d) Write down the sum-of-products expression that represents the output.
(3-e) Draw the circuit diagram for the given scenario, then verify its operation using Multisim.
(3-f) Compare the output of your circuit 'P' to the output of the circuit below 'F' by comparing
truth tables. Build the circuit below in the laboratory to validate your truth table. Show
photos of your setup and signal displays.
B
F
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