![](/assets/artwork/1x1-42817eea7ade52607a760cbee00d1495.gif)
Engine RPM 4+
Real-Time Specialties
-
- ¥58.00
iPhone 截屏
简介
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.
新内容
版本 2.5
* Optional Low-Pass Filtering to suppress high frequency interfering sounds.
* Optional signal rectification to transform high frequency percussive bursts into low frequencies that were otherwise too low to be detected by the microphone.
* Older unreliable modes of operation were removed (auto ranging and tracking) in favor of the more reliable Hint Band mode.
* Built-in help is greatly expanded.
App 隐私
开发者“Real-Time Specialties”已表明该 App 的隐私规范可能包括了下述的数据处理方式。有关更多信息,请参阅开发者隐私政策。
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隐私处理规范可能基于你使用的功能或你的年龄等因素而有所不同。了解更多
信息
- 提供者
- Real-Time Specialties, inc.
- 大小
- 3.3 MB
- 类別
- 工具
- 兼容性
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- iPhone
- 设备需装有 iOS 12.0 或更高版本。
- iPod touch
- 设备需装有 iOS 12.0 或更高版本。
- Apple Vision
- 设备需装有 visionOS 1.0 或更高版本。
- 语言
-
英语
- 年龄分级
- 4+
- Copyright
- © 2023 Real-Time Specialties, inc.
- 价格
- ¥58.00
支持
-
家人共享
启用“家人共享”,即可让最多 6 个家庭成员使用此 App。