Welcome to ABC Health Products! As ABC’s newest electro-mechanical engineer, you have been assigned to a design team to modify an existing blood pressure monitor to allow more flexibility and data collection for the company’s R&D projects. This prototype will be used as a test bed to collect data for the product development teams.
Your research team leader wants a monitor that will automatically cycle to measure blood pressure and will record the details of the pressure vs. time graph so that the company can develop new algorithms for calculating the blood pressure. Since there is no need for you to re-invent the basic parts of a blood pressure system, like the cuff or control valves you will re-purpose the parts from a commercially-available, consumer blood pressure monitor.
To develop the new devices, the design team needs a system that will operate as follows: The cuff is placed on the upper arm to pressurize the arteries, just like other blood pressure monitoring devices. A Pressure Sensor is connected to the cuff and is used to monitor the pressure in the cuff in units of mm Hg. The cuff is automatically pressurized with the pump from the consumer monitoring system. As the system pressurizes, the exhaust valve should be held closed so the cuff will automatically deflate if the power fails. Your on-screen display should include a graph of cuff pressure vs. time and a large, easily-readable indicator of live cuff pressure readings. Your program should be set up to stop inflation and produce a brief visual or audible signal when the cuff pressure has reached 165 mm Hg. The pressure release valve should slowly releases pressure out of the cuff. The exhaust valve should remain closed while the pressure bleeds out of the cuff. When the cuff pressure reaches 30 mm Hg the exhaust, the valve should open and allow the cuff to quickly deflate.
Engineering Extension Activities provide a way to add an engineering component to a Vernier science experiment. Use sensor data and Logger Pro software (or LabQuest 2) to help solve an engineering problem.