七麦数据

Measure the RPM of an engine by analyzing the sound it makes. Engine RPM listens to the sound of a running engine and uses advanced signal processing algorithms to extract the frequency of that sound and calculate the RPM.

This app is primarily for setup and diagnostics of engines. After setting the the number of cylinders and whether the engine is a 2-stroke or 4-stroke engine, the app can work with any internal combustion engine, from diesel tractors to aircraft engines to motorcycles to chainsaws. To use the app you must set an expected RPM range to guide the analysis algorithms to the correct RPM. A real-time graph of the autocorrelation graph is displayed to help in troubleshooting and adjusting the expected RPM range.

The analysis requires a clear sound from the engine without excessive interference from extraneous sounds. Do not expect to read the RPM of an engine while other things are making too much noise at the same time. The analysis also requires that the RPM be stable. It cannot read the RPM of an engine that is rapidly accelerating. For this reason, and because of the need for adjusting the expected RPM range, this app should not be considered a drop-in replacement for an operational tachometer.

Setup options include update periods from 93 milliseconds to 1.5 seconds, one to 12 cylinders, 2-stroke or 4-stroke, low-pass filtering, and signal clipping. The overall RPM range is 400 to 90,000 RPM (although at any one time, the operational range is typically +/- 30% around a nominal expected RPM). Precision is usually about +/- 10 RPM.

This app measures the RPM of an engine by analyzing the sound it makes. It uses advanced signal processing algorithms to measure the pitch of the sound and display and log the calculated RPM.

This app will not work if the engine sounds are muffled or unstable or combined with too much other noise. The engine sound must be clear and stable and sound like a single tone. Other sounds can also prevent the engine sound from being analyzed.

The software is configurable for 2-cycle and 4-cycle engines and includes a generic configuration for unusual cases, such as a reduction gear. The normal RPM range is 400 to 90,000 RPM, although much lower RPMs can be measured using the manual RPM matching option.

A detailed manual is available from our support webpage.

This app measures the RPM of an engine by analyzing the sound it makes. It uses advanced signal processing algorithms to measure the pitch of the sound and display and log the calculated RPM.

This app will not work if the engine sounds are muffled or unstable or combined with too much other noise. The engine sound must be clear and stable and sound like a single tone. Other sounds can also prevent the engine sound from being analyzed.

The software is configurable for 2-cycle and 4-cycle engines and includes a generic configuration for unusual cases, such as a reduction gear. The normal RPM range is 400 to 90,000 RPM, although much lower RPMs can be measured using the manual RPM matching option.

A detailed manual is available from our support webpage.