Suppose a person (height of 1.8 m) walks in a room installed with a pyroelectric infrared (PIR) motion detector. The distance between the person and the PIR detector is 5 m. The PIR detector sensor is 3 cm x 1 cm in size.
Estimate the radiated power at the surface of the sensor from the person. Assume that emissivity of human skin/fabric and sensor cap is 0.9. Assume that the person's body temperature is 37°C and the temperature at the surface of PIR detector is at 18°C. Also assume that there is no radiated power loss through air and Fresnel lens. You can roughly estimate surface area of the person.
Answers (1)
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Suppose a person (height of 1.8 m) walks in a room installed with a pyroelectric infrared (PIR) motion detector. The distance between the ...” in 📙 Engineering if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
A freeway exit ramp has a single lane and consists entirely of a horizontal curve with a central angle of 90 degrees and a length of 628 ft. If the distance cleared from the centerline for sight distance is 19.4 ft, what design speed was used?
Answers (1)
An engineering drawing shows the: (A) dimensions, tolerances, cost, and sales or use volume of a component. (B) dimensions, tolerances, materials, and finishes of a component.
Answers (1)
Which two word pairs to locate the word vicious in the dictionary
Answers (1)
A 50 Ibm block is moving at 4 ft/s. Find Its total kinetic energy? Also find Its kinetic energy per unit mass is
Answers (1)
The function below takes a single string parameter called sentence. Your function should return True if the sentence contains at least one copy of each of the following vowels: a, e, i, o, and u. Otherwise, return False.
Answers (1)
New Questions in Engineering
What types of documents are NOT acceptable to share on Course Hero? Select all that apply.
Answers (1)
Which of the following statements regarding the dermis is FALSE? The dermis contains a large amount of fat tissue. The dermis is composed of fibrous connective tissue. The dermis is also called the corium. The dermis houses sensory receptors.
Answers (1)
Let r be a bank's interest rate in percent per year (APR). An initial amount of money P, also called as principal, will mature to an amount of P (1+r/100) ^n after n years have passed.
Answers (1)
Fluid power is a. The technology that deals with the generation, control, and transmission of power-using pressurized fluids b. muscle that moves industry. c. used to push, pull, regulate, or drive virtually all the machine of modern industry d.
Answers (1)
6. PVC boxes are primarily used in new construction because it is simple to them to rafters or studs.
Answers (1)