JOHNE'S DISEASE. BVD (Bovine Virus Diarrhea) infection can cause numerous problems, such as damage to the digestive and immune systems, pneumonia, abortions, calf deformities, and others. Clinical signs in newborn calves infected with BVD include fever, nasal discharge, diarrhea, and inability to move about normally.
Ultrasonic Flow meter is a device used to measure the velocity of the fluid with the help of ultrasound transducers to compute volume flow of the fluid. This flow meter measures average velocity of the fluid with the use of sound waves. Working Principle of Ultrasonic Flow Meters-.
How an ultrasonic sensor uses sound waves to measure distances. 1  Teach students how to take distance measurements using the ultrasonic sensor. Refer to the pertinent presentation slides to introduce the LEGO-based ultrasonic device (as shown in Figure 3) and the steps to take mesurements (as shown in Figure 4).