CN102914435A - System and method for detecting electrical control nozzle response time in audio-frequency manner - Google Patents
System and method for detecting electrical control nozzle response time in audio-frequency manner Download PDFInfo
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Abstract
本发明属于汽车检测试验领域，具体是一种通过音频方式检测电控喷嘴响应时间的系统和方法，该系统包括喷嘴驱动器、衰减器、喷嘴、设置在喷嘴附近的麦克风、音频信号采集处理模块和显示模块，所述喷嘴驱动器分别与衰减器和喷嘴的输入端连接，衰减器的输出端连接音频信号采集处理模块的一个音频通道，麦克风将采集的喷嘴动作时的声音信号输入音频信号采集处理模块的另一个音频通道，音频信号采集处理模块将从两个音频通道获取的信号进行处理后送显示模块显示。本发明检测电控喷嘴响应时间时，可以提高检测的抗干扰能力、检测速度、检测精度和便捷性。
The invention belongs to the field of automobile detection and testing, and specifically relates to a system and method for detecting the response time of an electronically controlled nozzle through audio. The system includes a nozzle driver, an attenuator, a nozzle, a microphone arranged near the nozzle, an audio signal acquisition and processing module and A display module, the nozzle driver is respectively connected to the input end of the attenuator and the nozzle, the output end of the attenuator is connected to an audio channel of the audio signal acquisition and processing module, and the microphone inputs the collected sound signal of the nozzle action into the audio signal acquisition and processing module Another audio channel, the audio signal acquisition and processing module processes the signals obtained from the two audio channels and sends them to the display module for display. When the invention detects the response time of the electric control nozzle, the anti-interference ability, detection speed, detection accuracy and convenience of detection can be improved.
Description
Technical field
The invention belongs to the automobile test field, relate in particular to a kind of system and method that detects the automatically controlled nozzle response time by the audio frequency mode.
Background technology
The automatically controlled nozzle response time can be the meticulous control firing rate of ECU important evidence is provided, and reduces oil consumption to reach, improves the purpose of discharging and improving the vehicle drive performance.For a plurality of nozzles of same engine, the consistance of each nozzle response time directly has influence on engine performance, therefore fast detection method is particularly important accurately.Detect at present the method for nozzle response time and mainly contain three kinds: current method, the method need tested nozzle to cooperate with the nozzle controller of special use, and the existence time delay relevant with coil; Displacement method, each nozzle of the method needs to be equipped with unit clamp, and dismounting is complicated, and not being suitable in batches, nozzle detects; Discharge method, the method are statistical analysis methods, and high to the flow detection dependency degree, accuracy of detection is limited.
Summary of the invention
The object of the invention is to, a kind of system and method that detects the automatically controlled nozzle response time by the audio frequency mode is provided, it improves accuracy and the convenience that the nozzle response time is detected, and is true and reliable, can quick and precisely detect the nozzle response time.The nozzle response time can be detected fast and accurately, the needs of nozzle factory inspection and many nozzle combos can be satisfied again.
The technical solution used in the present invention is as follows for achieving the above object, a kind of system that detects the automatically controlled nozzle response time by the audio frequency mode, comprise nozzle driver, attenuator, nozzle, be arranged near the microphone of nozzle, audio signal sample processing module and display module, described nozzle driver is connected input end with attenuator respectively and is connected with nozzle, the output terminal of attenuator connects a voice-grade channel of audio signal sample processing module, another voice-grade channel of the voice signal input audio signal acquisition processing module of (comprising the opening and closing of nozzle) when microphone moves the nozzle that gathers, after the audio signal sample processing module will be carried out analyzing and processing from the signal that two voice-grade channels obtain, the result that analyzing and processing is obtained sent display module to show; Wherein the signal process of carrying out analyzing and processing comprises signal extraction and signal phase analysis.A kind of method that detects the automatically controlled nozzle response time by the audio frequency mode comprises the steps:
A, nozzle driver send pumping signal, and this pumping signal is sent to a voice-grade channel of audio signal sample processing module after with signal attenuation by attenuator.
The pumping signal that B, while nozzle driver send drives the nozzle opening and closing, and spool clashed into the sound that valve body sends when microphone gathered the nozzle opening and closing, and this voice signal is sent to the audio signal sample processing module by another voice-grade channel.
C, signal extraction: the audio signal sample processing module is presented at two signals of steps A and step B input on the display module, and extracts each periodic signal and analyze;
D, signal phase analysis: each periodic signal among the step C is carried out phase analysis, and the phase differential that calculates two signals obtains the automatically controlled nozzle response time, and analysis result is presented on the display module.
For obtaining better the automatically controlled nozzle response time, can comprise also among the step C that periodic signal is carried out digital filtering to be processed, and converts two channel pulse ripples of standard to.
The present invention takes full advantage of singularity and high frequency acquisition and the sensitivity of audio collection card that audio frequency is propagated, and improves antijamming capability, detection speed, accuracy of detection and the convenience that detects to reach.
Description of drawings
Fig. 1 is system principle diagram of the present invention;
Fig. 2 is the two channel audio signal oscillograms that the audio signal sample processing module gathers;
Fig. 3 is the oscillogram in a certain cycle among the Fig. 2 that extracts;
Fig. 4 is for carrying out Fig. 3 the oscillogram behind the filtering optimization;
Among the figure: the 1-nozzle driver; The 2-attenuator; The 3-nozzle; The 4-microphone; 5-audio signal sample processing module; The 6-display module.
Embodiment
Embodiment 1, referring to Fig. 1, a kind of system that detects the automatically controlled nozzle response time by the audio frequency mode, comprise nozzle driver 1, attenuator 2, nozzle 3, microphone 4, audio signal sample processing module 5 and display module 6, described nozzle driver 1 is connected with the input end that attenuator 2 is connected with nozzle respectively, the output terminal of attenuator 2 connects a voice-grade channel of audio signal sample processing module 5, another voice-grade channel of voice signal input audio signal acquisition processing module 5 when microphone 4 moves (comprising the opening and closing of nozzle 3) with the nozzle 3 that gathers, after audio signal sample processing module 5 will be carried out analyzing and processing from the signal that two voice-grade channels obtain, the result that analyzing and processing is obtained sent display module 6 to show; Wherein the signal process of carrying out analyzing and processing comprises signal extraction and signal phase analysis.
Above-mentioned microphone 4 is arranged near the nozzle 3, utilizes air to be propagation medium, directly in the detected element vitro detection, with the detected element physical isolation.Nozzle 3 can be selected MATRIX MJ-XJM, and nozzle driver can be selected QY11481280.The audio signal sample that the audio signal sample processing module is 5 li can be selected sound card, because the pumping signal that nozzle driver 1 sends is larger, in order to satisfy the input request signal of sound card, the present invention uses attenuator 2 that larger signal is decayed.
A, nozzle driver 1 send pumping signal, and this pumping signal will send to a voice-grade channel of audio signal sample processing module 5 by attenuator 2 after the signal attenuation.
The pumping signal that B, while nozzle driver 1 send drives nozzle 3 opening and closing, spool clashed into the sound that valve body sends when microphone 4 gathered nozzle 3 opening and closing, and this voice signal is sent to audio signal sample processing module 5 by another voice-grade channel.Two signals among steps A and the step B enter audio signal sample processing module 5 simultaneously, guarantee synchronous acquisition.
C, signal extraction: audio signal sample processing module 5 is presented at two signals of steps A and step B input on the display module 6, and extracts each periodic signal and analyze.
D, signal phase analysis: each periodic signal among the step C is carried out phase analysis, and the phase differential that calculates two signals obtains the automatically controlled nozzle response time, and analysis result is presented on the display module 6.
To obtain the automatically controlled nozzle response time in order being more convenient for, also periodic signal can be processed and conversion through digital filtering among the step C, convert two channel pulse ripples of standard to, waveform as shown in Figure 4.
Claims (5)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107796630A (en) * | 2016-09-05 | 2018-03-13 | 赛峰航空助推器股份有限公司 | Turbine testboard with Active noise control |
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| CN101377448A (en) * | 2008-09-24 | 2009-03-04 | 上海大学 | Automatic light-changing protective glass response time tester for welding |
| CN101696903A (en) * | 2009-10-30 | 2010-04-21 | 江苏万工科技集团有限公司 | Detection device of magnetic valve |
| CN102053009A (en) * | 2009-11-03 | 2011-05-11 | 中国电子科技集团公司第四十一研究所 | Method for measuring response time of photoelectric measurement instrument |
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Patent Citations (4)
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| CN101206159A (en) * | 2006-12-20 | 2008-06-25 | 海因里希·吉勒特有限责任公司 | Method for monitoring functional components of a motor vehicle |
| CN101377448A (en) * | 2008-09-24 | 2009-03-04 | 上海大学 | Automatic light-changing protective glass response time tester for welding |
| CN101696903A (en) * | 2009-10-30 | 2010-04-21 | 江苏万工科技集团有限公司 | Detection device of magnetic valve |
| CN102053009A (en) * | 2009-11-03 | 2011-05-11 | 中国电子科技集团公司第四十一研究所 | Method for measuring response time of photoelectric measurement instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107796630A (en) * | 2016-09-05 | 2018-03-13 | 赛峰航空助推器股份有限公司 | Turbine testboard with Active noise control |
| CN107796630B (en) * | 2016-09-05 | 2021-06-15 | 赛峰航空助推器股份有限公司 | Turbine test stand with active noise control |
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Application publication date: 20130206 |