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Engine rotating speed measuring method and device based on DSP (digital signal processor)

A technology of engine speed and measurement method, which is applied in the direction of measuring device, linear/angular velocity measurement, speed/acceleration/impact measurement, etc., which can solve the problems of low measurement accuracy and low anti-interference ability, and achieve the reduction of misjudgment rate and increase of rotation speed The effect of measurement accuracy and anti-interference ability

Active Publication Date: 2014-04-23
SHENZHEN COLIBRI TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a DSP-based engine speed measurement method and device for the above-mentioned defects of the prior art, aiming to solve the problem of low measurement accuracy and low anti-interference ability of the existing transmitter speed measurement. question

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  • Engine rotating speed measuring method and device based on DSP (digital signal processor)
  • Engine rotating speed measuring method and device based on DSP (digital signal processor)
  • Engine rotating speed measuring method and device based on DSP (digital signal processor)

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Embodiment Construction

[0059]The present invention provides a method and device for measuring engine speed based on DSP. In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0060] see figure 1 , figure 1 The flow chart of the preferred embodiment of the DSP-based engine speed measurement method provided by the present invention comprises the following steps:

[0061] Step S100, acquiring engine vibration signal, exhaust sound signal or engine ignition voltage signal, performing AD conversion on the obtained signal, and sampling the signal data after AD conversion according to a preset sampling rate;

[0062] Step S200, performing limiting digital filtering and Hanning ...

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Abstract

The invention discloses an engine rotating speed measuring method and an engine rotating speed measuring device based on a DSP (digital signal processor). The method comprises the steps of acquiring engine vibration signals, exhaust sound signals or engine ignition voltage signals, carrying out AD conversion on the acquired signals, and sampling signal data subjected to AD conversion according to a preset sampling rate; carrying out amplitude limiting digital filtering and hamming function adding processing on the sampled data; carrying out fast Fourier transformation on the processed data for enabling time-domain sampling data to be converted into a frequency spectrum value in frequency domain, and calculating amplitude values of various frequency points; calculating a frequency value corresponding to an engine according to a frequency fundamental wave spacing method; obtaining the rotating speed of the engine according to the relationship between the rotating speed of the engine and the frequency value corresponding to the engine. Therefore, the rotating speed measuring precision and the anti-interference capability are improved, and the misjudgment rate is reduced.

Description

technical field [0001] The invention relates to the technical field of frequency measurement, in particular to a DSP-based engine speed measurement method and device. Background technique [0002] The engine speed is the number of revolutions per minute of the engine crankshaft, expressed by n, and the unit is r / min. The speed of the engine is related to the number of work done per unit time or the effective power of the engine, that is, the effective power of the engine changes with the speed. Therefore, when specifying the effective power of the engine, its corresponding rotational speed must be indicated at the same time. The effective power specified on the engine product plate and its corresponding rotational speed are called rated power and rated rotational speed respectively. The working condition of the engine at the calibrated power and calibrated speed is called the calibrated working condition. The rated power is not the maximum power that the engine can genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/00
Inventor 丁昭继漆恭荣
Owner SHENZHEN COLIBRI TECH
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