What is a Cyclic Pressure Control System? How Does it Work?
The APP Cyclic Pressure Control System (CPCS) is a machine that generates cyclic pressure at a user-defined interval of minimum and maximum ranges. These ranges include atmospheric pressures of 5000 pneumatic systems (psi) all the way up to 60,000 (psi) hydraulic systems.
What’s more, is the CPCS machine is fully automated and is controlled by a microprocessor. This ensures that the results are highly accurate and the pressure transducer monitoring gives adequate feedback. The user-defined target pressures include holding times, pressurization rates, and dwell times that can be performed under elevated temperatures for stimulating actual operational conditions.
There’s also, a windows-based software that controls the entire pressure testing process and also depicts real-time test status during the entire process. Visually being able to look at the process step by step as it happens enables a better understanding of the expected results.
The Cyclic Pressure Control System determines an exact pressure range at which the battery casing can fail within. The device uses its vents to create the release test results and pinpoints the precise pressure when either the vent leaks or the battery crimp bursts.
The “how” of the Cyclic Pressure Control System
When running pressure tests from this device, you can manually control the test parameters such as initial burst target pressure, holding time, or pressurization rate. When the targeted burst pressure is reached without bursting the battery casing, you can then continue pressurizing in order to determine the exact burst pressure value.
Moreover, you can also discontinue the test from this point if you so choose. If you do decide about continuing the test, however, the battery case will burst at some point and start to leak. This can happen before reaching the targeted pressure. If this comes to pass, the pressurization ceases, and the test automatically discontinues.
Upon
completion of the test runs through the Cyclic Pressure Control System, you’ll receive a
spreadsheet of the pressure bursts and control values. This sheet can be
downloaded directly to Excel for further detailed analysis. If that wasn’t
convenient enough, you could also create reports for specific applications
using the machine’s software.
Basically, there are two major hardware systems at work here. First, the pneumatic system has an application of up to 5000 psi, and second, the hydraulic system with an application of up to 60,000 psi.
Further explanation of the two major working systems
Pneumatic System (5000 psi)
The cyclic pressure control device’s pneumatic system comprises gas boosters, pressure transducers, motorized values, pressure controllers, and monetarized pressure regulators. These highly accurate pressure transducers monitor the system’s pressure and provide feedback in the form of results.
The pneumatic system comprises of two distinct modes. These are the multi-target pressure control and the pressurization rate control. The control algorithms for both of these are based on PID controls. The multi-target pressure control allows you to minimize overshoot in order to reach the targeted pressure quicker and smoother.
On the other hand, the pressurization rate control provides operator control for the pressurization rates at which the target can be approached.
Hydraulic System (60,000 psi)
The cyclic pressure control machine’s second major system is the hydraulic system that comprises motorized pressure generator, high-pressure motorized valves, pressure controller, and pressure gauges. The DC motor drives the piston pressure for generating up to 60,000 psi in output.
Later, the accurate pressure transducer monitor system pressure provides feedback in the form of a report. The hydraulic system’s control units are exactly the same as that of the pneumatic system’s. They even work in the same way for achieving a quick and smooth pressure result until the pressure target is approached.
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