CN104879294B - A kind of water pump transient signal analytical equipment and method - Google Patents
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Abstract
本发明涉及一种水泵瞬态信号分析装置及方法，该装置包括：用于采集瞬态信号的信号采集单元、用于转换瞬态信号的模数转换单元、用于分析瞬态信号的信号处理单元和显示单元。本发明通过集成信号采集单元、模数转换单元和信号处理单元，能够同步记录、处理和显示水泵瞬态信号，避免了现有技术中不同信号类型的传感器接口不一致，现场接线混乱易出差错以及接线携带困难的技术问题；同时本发明还可以在记录电压信号和电流信号的同时，记录和处理动态信号。
The present invention relates to a water pump transient signal analysis device and method. The device includes: a signal acquisition unit for collecting transient signals, an analog-to-digital conversion unit for converting transient signals, and a signal processing unit for analyzing transient signals unit and display unit. The present invention can synchronously record, process and display the transient signal of the water pump by integrating the signal acquisition unit, the analog-to-digital conversion unit and the signal processing unit, avoiding the inconsistency of the sensor interfaces of different signal types in the prior art, the confusion of on-site wiring and the error-prone and Wiring carries a difficult technical problem; at the same time, the present invention can also record and process dynamic signals while recording voltage signals and current signals.
Description
技术领域technical field
本发明涉及水泵与水泵站监测技术领域，具体涉及一种水泵瞬态信号分析装置及方法。The invention relates to the technical field of water pump and water pump station monitoring, in particular to a water pump transient signal analysis device and method.
背景技术Background technique
目前，对水泵站的瞬态信号监测，主要依据《水力机械振动和脉动现场测试规程》(GB 17189-1997)。该规程只是针对水力机械(特别是水轮机)提出了检测压力脉动峰值的要求，但对于水泵，未详细规定所需检测压力脉动值的部位，以及如何评价压力脉动值。另外，目前所有压力脉动检测信号，均是与振动、噪声等检测信号分开处理的，缺少能够同步记录和处理水泵瞬态信号分析的方法和装置。At present, the transient signal monitoring of the water pumping station is mainly based on the "Hydraulic Machinery Vibration and Pulsation Field Test Regulations" (GB 17189-1997). This regulation only puts forward the requirements for detecting the peak value of pressure pulsation for hydraulic machinery (especially hydraulic turbines), but for water pumps, it does not specify in detail where the pressure pulsation value needs to be detected and how to evaluate the pressure pulsation value. In addition, at present, all pressure pulsation detection signals are processed separately from vibration, noise and other detection signals, and there is a lack of methods and devices capable of synchronously recording and processing transient signal analysis of water pumps.
随着现代电子传感器和计算机技术的发展，高精度动态信号加速度传感器、电压信号速度传感器和高频压阻式电流信号压力脉动传感器等传感器越来越多的应用于水站站现场。不同信号类型的传感器往往存在连接线接口不一致，从而导致现场接线多、易出错及携带困难等问题。而且各个信号需要分别测量，再最后汇总整理，水泵瞬态信号之间的联系分析比较困难，还要付出较多的人力，数据的操作管理也相当不方便。With the development of modern electronic sensors and computer technology, more and more sensors such as high-precision dynamic signal acceleration sensors, voltage signal speed sensors and high-frequency piezoresistive current signal pressure pulsation sensors are used in water station sites. Sensors of different signal types often have inconsistencies in the connection line interface, which leads to problems such as many on-site wiring, error-prone and difficult to carry. Moreover, each signal needs to be measured separately, and then summarized and sorted at the end. It is difficult to analyze the relationship between the transient signals of the water pump, and more manpower is required, and the operation and management of data is also quite inconvenient.
目前，已经出现了多通道的水泵和水泵站的测试设备，但多数仅是基于电流信号或电压信号的测试，而且多以关注压力、流量、转速和扭矩等外特征为主。At present, there have been multi-channel test equipment for water pumps and water pump stations, but most of them are only based on current signal or voltage signal tests, and most of them focus on external characteristics such as pressure, flow, speed and torque.
发明内容Contents of the invention
本发明所要解决的技术问题是如何能够同步记录和处理水泵瞬态信号。The technical problem to be solved by the invention is how to record and process the transient signal of the water pump synchronously.
为此目的，本发明提出了一种能够同步记录和处理水泵瞬态信号的一种水泵瞬态信号分析装置及方法。For this purpose, the present invention proposes a water pump transient signal analysis device and method capable of synchronously recording and processing the water pump transient signal.
本发明提供一种水泵瞬态信号分析装置，包括：The present invention provides a water pump transient signal analysis device, comprising:
信号采集单元，用于采集目标水泵的至少一个瞬态信号，所述瞬态信号为动态信号和/或电流信号和/或电压信号；A signal acquisition unit, configured to acquire at least one transient signal of the target water pump, where the transient signal is a dynamic signal and/or a current signal and/or a voltage signal;
模数转换单元，用于将所述动态信号和/或电流信号和/或电压信号分别转换为动态数字信号和/或电流数字信号和/或电压数字信号；An analog-to-digital conversion unit, configured to convert the dynamic signal and/or the current signal and/or the voltage signal into a dynamic digital signal and/or a current digital signal and/or a voltage digital signal;
信号处理单元，用于对所述动态数字信号和/或电流数字信号和/或电压数字信号进行时域分析、频域分析和时频联合分析；A signal processing unit, configured to perform time-domain analysis, frequency-domain analysis and joint time-frequency analysis on the dynamic digital signal and/or current digital signal and/or voltage digital signal;
显示单元，用于显示所述信号处理单元对所述动态数字信号、电流数字信号和电压数字信号所分析的结果。The display unit is used to display the analysis results of the dynamic digital signal, current digital signal and voltage digital signal by the signal processing unit.
可选地，所述信号采集单元包括：动态信号接收通道、电流信号接收通道和电压信号接收通道；Optionally, the signal acquisition unit includes: a dynamic signal receiving channel, a current signal receiving channel and a voltage signal receiving channel;
所述模数转换单元包括：动态信号采集卡、电流信号采集卡和电压信号采集卡。The analog-to-digital conversion unit includes: a dynamic signal acquisition card, a current signal acquisition card and a voltage signal acquisition card.
可选地，所述动态信号采集卡、电流信号采集卡和电压信号采集卡均包括信号调理单元、信号滤波单元和模数转化单元；其中，Optionally, the dynamic signal acquisition card, the current signal acquisition card and the voltage signal acquisition card all include a signal conditioning unit, a signal filtering unit and an analog-to-digital conversion unit; wherein,
所述信号调理单元，用于放大所述动态信号和/或电流信号和/或电压信号；The signal conditioning unit is used to amplify the dynamic signal and/or current signal and/or voltage signal;
所述信号滤波单元，用于对所述动态信号和/或电流信号和/或电压信号进行滤波；The signal filtering unit is configured to filter the dynamic signal and/or current signal and/or voltage signal;
所述模数转化单元，用于将所述信号滤波单元滤波后的所述动态信号、电流信号和电压信号转换为动态数字信号、电流数字信号和电压数字信号。The analog-to-digital conversion unit is configured to convert the dynamic signal, current signal and voltage signal filtered by the signal filtering unit into a dynamic digital signal, a current digital signal and a voltage digital signal.
可选地，所述动态信号包括需要激励才发生变化的信号。Optionally, the dynamic signal includes a signal that needs to be stimulated to change.
可选地，所述信号处理单元包括时域分析单元、频谱分析单元和时频分析单元；其中，Optionally, the signal processing unit includes a time-domain analysis unit, a spectrum analysis unit, and a time-frequency analysis unit; wherein,
所述时域分析单元，用于分析所述动态信号、电流信号和电压信号的平均值、有效值、峰度值和97％置信度峰峰值；The time-domain analysis unit is used to analyze the average value, effective value, kurtosis value and 97% confidence peak-to-peak value of the dynamic signal, current signal and voltage signal;
所述频谱分析单元，用于分析分析所述动态信号、电流信号和电压信号的第一主频、第二主频和第三主频及其幅值；The spectrum analysis unit is used to analyze and analyze the first main frequency, the second main frequency and the third main frequency and their amplitudes of the dynamic signal, current signal and voltage signal;
所述时频分析单元，用于分析所述动态数字信号、电流数字信号和电压数字信号的主要频率随时间的变化情况。The time-frequency analysis unit is used to analyze the variation of the main frequency of the dynamic digital signal, the current digital signal and the voltage digital signal with time.
本发明还提供一种水泵瞬态信号分析方法，包括：The present invention also provides a water pump transient signal analysis method, comprising:
采集目标水泵的至少一个瞬态信号，所述瞬态信号为动态信号和/或电流信号和/或电压信号；Collect at least one transient signal of the target water pump, where the transient signal is a dynamic signal and/or a current signal and/or a voltage signal;
将所述动态信号和/或电流信号和/或电压信号分别转换为动态数字信号和/或电流数字信号和/或电压数字信号；converting said dynamic signal and/or current signal and/or voltage signal into a dynamic digital signal and/or current digital signal and/or voltage digital signal, respectively;
对所述动态数字信号和/或电流数字信号和/或电压数字信号进行时域分析、频域分析和时频联合分析；performing time-domain analysis, frequency-domain analysis, and joint time-frequency analysis on the dynamic digital signal and/or current digital signal and/or voltage digital signal;
显示对所述动态数字信号和/或电流数字信号和/或电压数字信号分析的结果。Displaying the analysis results of the dynamic digital signal and/or the current digital signal and/or the voltage digital signal.
可选地，所述接收外部传感器发送的动态信号和/或电流信号和/或电压信号包括：Optionally, receiving the dynamic signal and/or current signal and/or voltage signal sent by the external sensor includes:
通过动态信号接收通道接收所述目标水泵的动态信号；receiving the dynamic signal of the target water pump through a dynamic signal receiving channel;
通过电流信号接收通道接收所述目标水泵的电流信号；receiving the current signal of the target water pump through the current signal receiving channel;
通过电压信号接收通道接收所述目标水泵发送的电压信号；receiving the voltage signal sent by the target water pump through the voltage signal receiving channel;
所述将所述动态信号和/或电流信号和/或电压信号分别转换为动态数字信号和/或电流数字信号和/或电压数字信号包括：通过模数转换单元分别将所述动态信号和/或所述电流信号和/或所述电压信号转换为动态数字信号。The converting the dynamic signal and/or the current signal and/or the voltage signal into a dynamic digital signal and/or a current digital signal and/or a voltage digital signal respectively includes: respectively converting the dynamic signal and/or voltage signal through an analog-to-digital conversion unit Or the current signal and/or the voltage signal is converted into a dynamic digital signal.
可选地，所述将所述动态信号和/或电流信号和/或电压信号分别转换为动态数字信号、电流数字信号和电压数字信号包括：Optionally, converting the dynamic signal and/or the current signal and/or the voltage signal into a dynamic digital signal, a current digital signal and a voltage digital signal respectively includes:
放大所述动态信号和/或电流信号和/或电压信号；amplifying said dynamic signal and/or current signal and/or voltage signal;
对所述动态信号和/或电流信号和/或电压信号进行滤波；filtering said dynamic signal and/or current signal and/or voltage signal;
将滤波后的所述动态信号和/或电流信号和/或电压信号转换为动态数字信号和/或电流数字信号和/或电压数字信号。Converting the filtered dynamic signal and/or current signal and/or voltage signal into a dynamic digital signal and/or current digital signal and/or voltage digital signal.
可选地，所述动态信号包括需要激励才发生变化的信号。Optionally, the dynamic signal includes a signal that needs to be stimulated to change.
可选地，所述对所述动态数字信号和/或电流数字信号和/或电压数字信号进行时域分析、频域分析和时频联合分析包括：Optionally, performing time-domain analysis, frequency-domain analysis and joint time-frequency analysis on the dynamic digital signal and/or current digital signal and/or voltage digital signal includes:
分析所述动态数字信号和/或电流数字信号和/或电压数字信号的平均值、有效值、峰度值和97％置信度峰峰值；analyzing the mean value, effective value, kurtosis value and 97% confidence peak-to-peak value of said dynamic digital signal and/or current digital signal and/or voltage digital signal;
分别分析所述动态数字信号和/或电流数字信号和电压数字信号的第一主频、第二主频和第三主频及其幅值；respectively analyzing the first main frequency, the second main frequency and the third main frequency and their amplitudes of the dynamic digital signal and/or current digital signal and voltage digital signal;
分别分析所述动态数字信号和/或电流数字信号和/或电压数字信号的主要频率随时间的变化情况。The variation of the main frequency of the dynamic digital signal and/or the current digital signal and/or the voltage digital signal with time is respectively analyzed.
本发明所公开了一种水泵瞬态信号分析装置及方法，该装置通过集成信号采集单元、模数转换单元和信号处理单元，能够同步记录、处理和显示水泵瞬态信号，避免了现有技术中不同信号类型的传感器接口不一致，现场接线混乱易出差错以及接线携带困难的技术问题；同时本发明还可以在记录电压信号和电流信号的同时，记录和处理动态信号。The invention discloses a water pump transient signal analysis device and method. The device can synchronously record, process and display the water pump transient signal by integrating a signal acquisition unit, an analog-to-digital conversion unit and a signal processing unit, avoiding the problems of the prior art. The sensor interfaces of different signal types are inconsistent, the on-site wiring is chaotic and error-prone, and the technical problems of wiring are difficult to carry; at the same time, the present invention can also record and process dynamic signals while recording voltage signals and current signals.
附图说明Description of drawings
通过参考附图会更加清楚的理解本发明的特征和优点，附图是示意性的而不应理解为对本发明进行任何限制，在附图中：The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way. In the accompanying drawings:
图1示出了本发明的其中一个实施例的一种水泵瞬态信号分析装置的结构示意图；Fig. 1 shows a schematic structural diagram of a water pump transient signal analysis device according to one embodiment of the present invention;
图2出了本发明的其中一个实施例的一种水泵瞬态信号分析装置与水泵的信号流向示意图；Figure 2 shows a schematic diagram of a water pump transient signal analysis device and the signal flow direction of the water pump according to one embodiment of the present invention;
图3出了本发明的其中一个实施例的一种水泵瞬态信号分析方法的流程示意图。Fig. 3 shows a schematic flowchart of a method for analyzing a transient signal of a water pump according to one embodiment of the present invention.
具体实施方式detailed description
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
一种水泵瞬态信号分析装置，如图1所示，包括：A water pump transient signal analysis device, as shown in Figure 1, includes:
信号采集单元11，用于采集目标水泵的至少一个瞬态信号，瞬态信号为动态信号和/或电流信号和/或电压信号；A signal acquisition unit 11, configured to acquire at least one transient signal of the target water pump, where the transient signal is a dynamic signal and/or a current signal and/or a voltage signal;
模数转换单元12，用于将动态信号和/或电流信号和/或电压信号分别转换为动态数字信号和/或电流数字信号和/或电压数字信号；An analog-to-digital conversion unit 12, configured to convert the dynamic signal and/or the current signal and/or the voltage signal into a dynamic digital signal and/or a current digital signal and/or a voltage digital signal;
信号处理单元13，用于对动态数字信号和/或电流数字信号和/或电压数字信号进行时域分析、频域分析和时频联合分析；A signal processing unit 13, configured to perform time-domain analysis, frequency-domain analysis and joint time-frequency analysis on dynamic digital signals and/or current digital signals and/or voltage digital signals;
显示单元14，用于显示信号处理单元对动态数字信号、电流数字信号和电压数字信号所分析的结果。The display unit 14 is used to display the analysis results of the dynamic digital signal, current digital signal and voltage digital signal by the signal processing unit.
本实施例所公开的一种水泵瞬态信号分析装置，通过采用统一的信号采集单元、模数转换单元和信号处理单元，能够同步记录和处理水泵瞬态信号，避免了现有技术中不同信号类型的传感器接口不一致，导致现场接线混乱易出差错以及接线携带困难的技术问题。另外，还可以在记录电压信号和电流信号的同时，记录和处理动态信号。A water pump transient signal analysis device disclosed in this embodiment can synchronously record and process water pump transient signals by adopting a unified signal acquisition unit, analog-to-digital conversion unit, and signal processing unit, avoiding the different signals in the prior art. Different types of sensor interfaces are inconsistent, resulting in technical problems such as confusing field wiring, error-prone and difficult wiring. In addition, dynamic signals can be recorded and processed while recording voltage and current signals.
具体地，信号采集单元包括：动态信号接收通道、电流信号接收通道和电压信号接收通道；动态信号接收通道的数量可以为8个，电流信号接收通道的数量可以为8个，电压信号接收通道的数量可以为8个；该动态信号接收通道、电流信号接收通道和电压信号接收通道的接口为四针航空插头接口或同轴电缆接口。目标水泵上设置有能够测量各种参数的多个传感器，例如，加速度传感器、压力脉动传感器和声级计等，用于测量泵体振动信号、压力脉动信号和噪声信号等。每个传感器可以生成一个动态信号或电压信号或电流信号，这些动态信号或电压电信或电流信号均为瞬态信号，每个瞬态信号均对应着动态信号接收通道、电流信号接收通道和电压信号接收通道中的一种。Specifically, the signal acquisition unit includes: a dynamic signal receiving channel, a current signal receiving channel and a voltage signal receiving channel; the number of dynamic signal receiving channels can be 8, the number of current signal receiving channels can be 8, and the number of voltage signal receiving channels can be 8. The number can be 8; the interface of the dynamic signal receiving channel, the current signal receiving channel and the voltage signal receiving channel is a four-pin aviation plug interface or a coaxial cable interface. Multiple sensors capable of measuring various parameters, such as acceleration sensors, pressure pulsation sensors, and sound level meters, are installed on the target water pump to measure vibration signals, pressure pulsation signals, and noise signals of the pump body. Each sensor can generate a dynamic signal or a voltage signal or a current signal, these dynamic signals or voltage telecommunication or current signals are transient signals, and each transient signal corresponds to a dynamic signal receiving channel, a current signal receiving channel and a voltage signal One of the receiving channels.
在本实施例的实验过程中，实际用到的电压信号接收通道可以为6个，并可设置其他2个电压信号接收通道作为备选，以便在后期目标水泵改进时增加了传感器，从而接收所增加的传感器发送的电压信号；电流信号接收通道和电压信号接收通道与此类似，在此不再赘述。In the experiment process of this embodiment, the number of voltage signal receiving channels actually used can be 6, and the other 2 voltage signal receiving channels can be set as alternatives, so that sensors can be added when the target water pump is improved in the later stage, so as to receive all The voltage signal sent by the added sensor; the current signal receiving channel and the voltage signal receiving channel are similar, and will not be repeated here.
具体地，模数转换单元包括：动态信号采集卡、电流信号采集卡和电压信号采集卡。Specifically, the analog-to-digital conversion unit includes: a dynamic signal acquisition card, a current signal acquisition card and a voltage signal acquisition card.
每个动态信号采集卡、电流信号采集卡和电压信号采集卡均包括信号调理单元、信号滤波单元和模数转化单元；该动态信号采集卡型号为NI 9234，电流信号采集卡型号为NI 9203，电压信号采集卡型号为NI 9201。Each dynamic signal acquisition card, current signal acquisition card and voltage signal acquisition card includes a signal conditioning unit, a signal filter unit and an analog-to-digital conversion unit; the model of the dynamic signal acquisition card is NI 9234, and the model of the current signal acquisition card is NI 9203. The voltage signal acquisition card model is NI 9201.
其中，in,
信号调理单元，用于放大动态信号和/或电流信号和/或电压信号；A signal conditioning unit for amplifying dynamic signals and/or current signals and/or voltage signals;
信号滤波单元，用于对动态信号和/或电流信号和/或电压信号进行滤波；A signal filtering unit for filtering dynamic signals and/or current signals and/or voltage signals;
模数转化单元，用于将信号滤波单元滤波后的动态信号和/或电流信号和/或电压信号转换为动态数字信号和/或电流数字信号和/或电压数字信号。The analog-to-digital conversion unit is used to convert the dynamic signal and/or the current signal and/or the voltage signal filtered by the signal filtering unit into a dynamic digital signal and/or a current digital signal and/or a voltage digital signal.
所述动态信号包括需要激励才发生变化的信号。在水泵的工作过程中，其上安装的各个传感器接收的信号根据水压、温度或其他环境参数的变化而不断变化，从而形成动态信号。本发明除可以记录和处理电压信号和电流信号外，还可以记录和处理动态信号。The dynamic signals include signals that require excitation to change. During the working process of the water pump, the signals received by the various sensors installed on it are constantly changing according to changes in water pressure, temperature or other environmental parameters, thus forming a dynamic signal. In addition to recording and processing voltage signals and current signals, the invention can also record and process dynamic signals.
具体地，信号处理单元包括时域分析单元、频谱分析单元和时频分析单元；Specifically, the signal processing unit includes a time-domain analysis unit, a spectrum analysis unit and a time-frequency analysis unit;
其中，in,
所述时域分析单元，用于分析所述动态信号、电流信号和电压信号的平均值、有效值、峰度值和97％置信度峰峰值；The time-domain analysis unit is used to analyze the average value, effective value, kurtosis value and 97% confidence peak-to-peak value of the dynamic signal, current signal and voltage signal;
所述频谱分析单元，用于分析分析所述动态信号、电流信号和电压信号的第一主频、第二主频和第三主频及其幅值；The spectrum analysis unit is used to analyze and analyze the first main frequency, the second main frequency and the third main frequency and their amplitudes of the dynamic signal, current signal and voltage signal;
所述时频分析单元，用于分析所述动态数字信号、电流数字信号和电压数字信号的主要频率随时间的变化情况。The time-frequency analysis unit is used to analyze the variation of the main frequency of the dynamic digital signal, the current digital signal and the voltage digital signal with time.
时频分析单元用于分析动态数字信号、电流数字信号和电压数字信号在时间上的变化；频谱分析单元用于分析动态数字信号、电流数字信号和电压数字信号在频率上的变化；而时频分析单元，结合时域和频域，能够同时分析动态数字信号、电流数字信号和电压数字信号的频率随时间的变化情况。The time-frequency analysis unit is used to analyze the changes in time of dynamic digital signals, current digital signals and voltage digital signals; the frequency spectrum analysis unit is used to analyze the changes in frequency of dynamic digital signals, current digital signals and voltage digital signals; and the time-frequency The analysis unit, combining the time domain and the frequency domain, can simultaneously analyze the frequency variation of the dynamic digital signal, the current digital signal and the voltage digital signal over time.
如图2所示，具体地，目标水泵101上设置有能够测量各种参数的多个传感器，例如，加速度传感器、压力脉动传感器和声级计等，来测量泵体振动信号、压力脉动信号和噪声号等。每个传感器可以生成一个动态信号或电压信号或电流信号。本发明的水泵瞬态信号分析装置102接收该动态信号和/或电压信号和/或电流信号，并进行调理、滤波和数模转换，然后，采用计算机103上安装的Matlab软件进行时域分析、频谱分析和时频分析。As shown in Figure 2, specifically, the target water pump 101 is provided with a plurality of sensors capable of measuring various parameters, such as acceleration sensors, pressure pulsation sensors, and sound level meters, etc., to measure pump body vibration signals, pressure pulsation signals and noise number etc. Each sensor can generate a dynamic signal or a voltage signal or a current signal. The water pump transient signal analysis device 102 of the present invention receives the dynamic signal and/or voltage signal and/or current signal, and performs conditioning, filtering and digital-to-analog conversion, and then uses Matlab software installed on the computer 103 to perform time domain analysis, Spectrum analysis and time-frequency analysis.
具体地，信号处理单元与显示单元通过USB接口相连。Specifically, the signal processing unit is connected to the display unit through a USB interface.
本发明的水泵瞬态信号分析装置还包括电源15，通过三针标准接口为该装置供电。The water pump transient signal analysis device of the present invention also includes a power supply 15, which supplies power to the device through a three-pin standard interface.
综上，本发明的实施例通过采用统一的信号采集单元、模数转换单元和信号处理单元，针对性的采集动态信号、电流信号和/或电压信号，能够同步记录和处理水泵瞬态信号，并实时显示处理结果大大提高了水泵瞬态信号监测和分析水平，而且本发明的装置接线方式简单可靠，可替换性好，有效地减少了接线的数量，从而避免接线数量过多引起的错误。To sum up, the embodiment of the present invention uses a unified signal acquisition unit, an analog-to-digital conversion unit, and a signal processing unit to collect dynamic signals, current signals, and/or voltage signals in a targeted manner, and can simultaneously record and process transient signals of the water pump. And the real-time display of the processing results greatly improves the monitoring and analysis level of the transient signal of the water pump, and the device wiring method of the present invention is simple and reliable, has good replaceability, effectively reduces the number of wirings, and thus avoids errors caused by too many wirings.
本发明还提供一种水泵瞬态信号分析方法，如图3所示，包括：The present invention also provides a water pump transient signal analysis method, as shown in Figure 3, comprising:
S1，采集目标水泵的至少一个瞬态信号，所述瞬态信号为动态信号和/或电流信号和/或电压信号；S1. Collect at least one transient signal of the target water pump, where the transient signal is a dynamic signal and/or a current signal and/or a voltage signal;
S2，将所述动态信号和/或电流信号和/或电压信号分别转换为动态数字信号和/或电流数字信号和/或电压数字信号；S2, respectively converting the dynamic signal and/or the current signal and/or the voltage signal into a dynamic digital signal and/or a current digital signal and/or a voltage digital signal;
S3，对所述动态数字信号和/或电流数字信号和/或电压数字信号进行时域分析、频域分析和时频联合分析；S3, performing time-domain analysis, frequency-domain analysis and joint time-frequency analysis on the dynamic digital signal and/or current digital signal and/or voltage digital signal;
S4，显示对所述动态数字信号和/或电流数字信号和/或电压数字信号分析的结果。S4, displaying an analysis result of the dynamic digital signal and/or the current digital signal and/or the voltage digital signal.
所述步骤S1包括：Said step S1 comprises:
S101，通过动态信号接收通道接收所述目标水泵的动态信号；S101. Receive a dynamic signal of the target water pump through a dynamic signal receiving channel;
S102，通过电流信号接收通道接收所述目标水泵的电流信号；S102. Receive the current signal of the target water pump through the current signal receiving channel;
S103，通过电压信号接收通道接收所述目标水泵发送的电压信号。S103. Receive the voltage signal sent by the target water pump through the voltage signal receiving channel.
具体地，动态信号接收通道的数量为8个，电流信号接收通道的数量为8个，电压信号接收通道的数量为8个；该动态信号接收通道、电流信号接收通道和电压信号接收通道的接口为四针航空插头接口或同轴电缆接口。目标水泵上设置有能够测量各种参数的多个传感器，例如，加速度传感器、压力脉动传感器和声级计等，来测量泵体振动信号、压力脉动信号和噪声号等。每个传感器可以生成一个动态信号或电压信号或电流信号，这些动态信号或电压电信或电流信号均为瞬态信号，每个瞬态信号均对应着动态信号接收通道、电流信号接收通道和电压信号接收通道中的一种，在本发明的实验过程中，实际用到的电压信号接收通道为6个，其他2个电压信号接收通道作为备选，以便在后期目标水泵改进时，增加了传感器，可以接收所增加的传感器发送的电压信号；电流信号接收通道和电压信号接收通道与此类似，在此不再赘述。Specifically, the number of dynamic signal receiving channels is 8, the number of current signal receiving channels is 8, and the number of voltage signal receiving channels is 8; the interface of the dynamic signal receiving channel, current signal receiving channel and voltage signal receiving channel It is a four-pin aviation plug interface or a coaxial cable interface. Multiple sensors capable of measuring various parameters, such as acceleration sensors, pressure pulsation sensors, and sound level meters, are installed on the target water pump to measure vibration signals, pressure pulsation signals, and noise numbers of the pump body. Each sensor can generate a dynamic signal or a voltage signal or a current signal, these dynamic signals or voltage telecommunication or current signals are transient signals, and each transient signal corresponds to a dynamic signal receiving channel, a current signal receiving channel and a voltage signal One of the receiving channels, in the experimental process of the present invention, there are 6 voltage signal receiving channels actually used, and the other 2 voltage signal receiving channels are used as alternatives, in order to increase the sensor when the target water pump is improved later, The voltage signal sent by the added sensor can be received; the current signal receiving channel and the voltage signal receiving channel are similar to this, and will not be repeated here.
所述步骤S2包括：Described step S2 comprises:
S201，通过模数转换单元分别将所述动态信号和/或所述电流信号和/或所述电压信号转换为动态数字信号。S201. Convert the dynamic signal and/or the current signal and/or the voltage signal into a dynamic digital signal by an analog-to-digital conversion unit.
所述步骤S201包括：The step S201 includes:
S2011，放大所述动态信号和/或电流信号和/或电压信号；S2011, amplifying the dynamic signal and/or current signal and/or voltage signal;
S2012，对所述动态信号和/或电流信号和/或电压信号进行滤波；S2012, filtering the dynamic signal and/or current signal and/or voltage signal;
S2013，将滤波后的所述动态信号和/或电流信号和/或电压信号转换为动态数字信号和/或电流数字信号和/或电压数字信号。S2013. Convert the filtered dynamic signal and/or current signal and/or voltage signal into a dynamic digital signal and/or current digital signal and/or voltage digital signal.
具体地，所述动态信号包括需要激励才发生变化的信号。在水泵的工作过程中，其上安装的各个传感器接收的信号是不断变化的，也就是所谓的瞬态信号。本发明除可以记录和处理电压信号和电流信号外，还可以记录和处理动态信号。Specifically, the dynamic signal includes a signal that needs to be stimulated to change. During the working process of the water pump, the signals received by the various sensors installed on it are constantly changing, which is the so-called transient signal. In addition to recording and processing voltage signals and current signals, the invention can also record and process dynamic signals.
所述步骤S3包括：Described step S3 comprises:
S301，分析所述动态数字信号和/或电流数字信号和/或电压数字信号的平均值、有效值、峰度值和97％置信度峰峰值；S301, analyzing the average value, effective value, kurtosis value and 97% confidence peak-to-peak value of the dynamic digital signal and/or current digital signal and/or voltage digital signal;
S302，分别分析所述动态数字信号和/或电流数字信号和电压数字信号的第一主频、第二主频和第三主频及其幅值；S302, respectively analyzing the first main frequency, the second main frequency and the third main frequency and their amplitudes of the dynamic digital signal and/or current digital signal and voltage digital signal;
S303，分别分析所述动态数字信号和/或电流数字信号和/或电压数字信号的主要频率随时间的变化情况。本发明所公开的一种水泵瞬态信号分析方法，通过统一采集目标水泵的至少一个瞬态信号，所述瞬态信号为动态信号和/或电流信号和/或电压信号；将所述动态信号和/或电流信号和/或电压信号分别转换为动态数字信号和/或电流数字信号和/或电压数字信号；对所述动态数字信号和/或电流数字信号和/或电压数字信号进行时域分析、频域分析和时频联合分析；该方法避免了现有技术中不同信号类型的传感器接口不一致，现场接线混乱易出差错以及接线携带困难的技术问题；同时本发明还可以在记录电压信号和电流信号的同时，记录和处理动态信号，有效提高了水泵和水泵站监测的精度。S303. Analyze respectively the variation of the main frequency of the dynamic digital signal and/or the current digital signal and/or the voltage digital signal over time. A water pump transient signal analysis method disclosed in the present invention, by uniformly collecting at least one transient signal of the target water pump, the transient signal is a dynamic signal and/or a current signal and/or a voltage signal; the dynamic signal is and/or the current signal and/or the voltage signal are respectively converted into a dynamic digital signal and/or a current digital signal and/or a voltage digital signal; analysis, frequency domain analysis and time-frequency joint analysis; this method avoids the technical problems of inconsistent sensor interfaces of different signal types in the prior art, confusion and error-prone field wiring, and difficult wiring carrying; at the same time, the present invention can also record voltage signals At the same time as the current signal, the dynamic signal is recorded and processed, which effectively improves the monitoring accuracy of the water pump and the water pump station.
虽然结合附图描述了本发明的实施方式，但是本领域技术人员可以在不脱离本发明的精神和范围的情况下做出各种修改和变型，这样的修改和变型均落入由所附权利要求所限定的范围之内。Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. within the bounds of the requirements.
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