CN109779845A - Wind turbine signal acquisition circuit - Google Patents
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Abstract
Description
技术领域technical field
本发明涉及测量技术领域，具体涉及一种风力发电机组信号采集电路。The invention relates to the technical field of measurement, in particular to a signal acquisition circuit of a wind generator set.
背景技术Background technique
风力发电机组的振动监测对于实现风力发电机组的安，稳，长，满，优运行十分重要。各风力发电机制造厂或业主都为风力发电机组配置了信号采集监测系统。The vibration monitoring of wind turbines is very important to realize the safe, stable, long, full and optimal operation of wind turbines. Each wind turbine manufacturer or owner is equipped with a signal acquisition and monitoring system for the wind turbine.
但风力发电机组安装在塔筒顶端的机舱里，电磁环境很复杂，包括发电机电磁干扰，雷电干扰等，严重时会直接影响测量结果的准确性，给分析风电机组的状态或故障带来干扰，影响判断的准确性。现有的信号采集监测系统也采取了一些技术措施，如：数字滤波，模拟滤波和避雷装置等，但传输路径上信号仍然会受到干扰，也没有解决雷电干扰信号的问题。However, the wind turbine is installed in the nacelle at the top of the tower, and the electromagnetic environment is very complex, including generator electromagnetic interference, lightning interference, etc. In severe cases, it will directly affect the accuracy of the measurement results and cause interference to the analysis of the status or failure of the wind turbine. , affecting the accuracy of judgment. The existing signal acquisition and monitoring system has also taken some technical measures, such as: digital filtering, analog filtering and lightning protection devices, etc., but the signal on the transmission path will still be interfered, and the problem of lightning interference signals has not been solved.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明实施例提供了一种风力发电机组信号采集电路，以解决现有技术中风力发电机组信号采集电路的抗干扰性不强的问题。In view of this, the embodiment of the present invention provides a signal acquisition circuit of a wind power generator set to solve the problem that the signal acquisition circuit of a wind power generator set has weak anti-interference in the prior art.
本发明第一方面提供了一种风力发电机组信号采集电路，包括信号采集器和隔离器，其中：A first aspect of the present invention provides a signal acquisition circuit for a wind turbine generator set, including a signal collector and an isolator, wherein:
信号采集器与风力发电机组连接，用于采集风力发电机组的输出信号；隔离器与信号采集器连接，用于将前端输入级信息与输出级信号进行耦合传递。The signal collector is connected with the wind power generator set for collecting the output signal of the wind power generator set; the isolator is connected with the signal collector for coupling and transmission of the front-end input stage information and the output stage signal.
可选地，直流电源采用隔离方式为风力发电机组采集电路的信号输入级与输出级的元器件供电。Optionally, the DC power supply supplies power to the components of the signal input stage and the output stage of the wind turbine collection circuit in an isolated manner.
可选地，低通滤波器与隔离器的输出端连接，用于截止高于预定频率的信号通过；模数转换器的输入端与低通滤波器的输出端连接，用于将输出信号转换为数字信号；ARM处理器与模数转换器输出端连接，用于对输出信号执行指令处理。Optionally, the low-pass filter is connected to the output end of the isolator, and is used to cut off signals higher than a predetermined frequency from passing through; the input end of the analog-to-digital converter is connected to the output end of the low-pass filter, and is used to convert the output signal. It is a digital signal; the ARM processor is connected with the output end of the analog-to-digital converter, and is used for executing instruction processing on the output signal.
可选地，运算放大器接在隔离器和低通滤波器之间，用于将输出信号的幅值限定在预定范围内。Optionally, the operational amplifier is connected between the isolator and the low-pass filter to limit the amplitude of the output signal within a predetermined range.
可选地，存储器与ARM处理器连接，用于存储经ARM处理器处理的输出信号。Optionally, the memory is connected to the ARM processor for storing the output signal processed by the ARM processor.
可选地，存储器包括RAM和/或FLASH芯片。Optionally, the memory includes RAM and/or FLASH chips.
可选地，光耦合器一端连接ARM处理器的输出端，另一端连入局域网和/或远程控制平台。Optionally, one end of the optocoupler is connected to the output end of the ARM processor, and the other end is connected to a local area network and/or a remote control platform.
根据本发明提供的风力发电机组信号采集电路，信号采集器对风力发电机组的输出信号进行采集，隔离器对采集到的信号进行隔离，切断了采集电路的干扰信号源，增强了风力发电机组信号采集电路的抗干扰性。According to the signal acquisition circuit of the wind generator set provided by the present invention, the signal collector collects the output signal of the wind generator set, the isolator isolates the acquired signal, cuts off the interference signal source of the acquisition circuit, and enhances the signal of the wind generator set. Anti-interference of the acquisition circuit.
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 reference to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way, in which:
图1为本发明实施例中一种风力发电机组信号采集电路的结构示意图；1 is a schematic structural diagram of a signal acquisition circuit for a wind turbine in an embodiment of the present invention;
图2为本发明实施例中一种风力发电机组信号采集电路的连接示意图。FIG. 2 is a schematic diagram of the connection of a signal acquisition circuit of a wind turbine in an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
如图1所示，本发明实施例提供了一种风力发电机组信号采集电路，包括信号采集器1和隔离器2，其中：As shown in FIG. 1 , an embodiment of the present invention provides a signal acquisition circuit for a wind turbine, including a signal collector 1 and an isolator 2, wherein:
信号采集器1与风力发电机组连接，用于采集风力发电机组的输出信号；隔离器2与信号采集器1连接，用于将前端输入级信息与输出级信号进行耦合传递。在具体实施例中，对风力发电机组的振动信号进行采集时，信号采集器1采集到的振动信号容易受环境因素影响，譬如风力发电机组周围电磁发生变化以及雷电的干扰，隔离器2(Isolator)对采集器1采集到的振动信号进行隔离耦合传递。如图2所示，图中“SS”器件即隔离器2。The signal collector 1 is connected with the wind power generator set for collecting the output signal of the wind power generator set; the isolator 2 is connected with the signal collector 1 for coupling and transmitting the front-end input stage information and the output stage signal. In a specific embodiment, when the vibration signal of the wind turbine is collected, the vibration signal collected by the signal collector 1 is easily affected by environmental factors, such as electromagnetic changes around the wind turbine and the interference of lightning, the isolator 2 (Isolator 2 (Isolator 2). ) to isolate and couple and transmit the vibration signal collected by the collector 1 . As shown in Figure 2, the "SS" device in the figure is the isolator 2.
作为可选的实施方式，直流电源3采用隔离方式为风力发电机组采集电路的信号输入级与输出级的元器件供电。在具体实施例中，采用24V的直流电源为信号采集电路的输入级与输出级元器件进行供电，与风力发电机组的电路隔离，如图2所示，直流电源为隔离器、运算放大器(PGA)、低通滤波器(LP)和模数转换器(AD)进行供电，这些元器件在运行过程中不受风力发电机组电路振荡影响。As an optional embodiment, the DC power supply 3 supplies power to the components of the signal input stage and the output stage of the wind turbine collecting circuit in an isolated manner. In a specific embodiment, a 24V DC power supply is used to supply power to the input stage and output stage components of the signal acquisition circuit, and is isolated from the circuit of the wind turbine. As shown in Figure 2, the DC power supply is an isolator, an operational amplifier (PGA) ), low-pass filter (LP) and analog-to-digital converter (AD) for power supply, which are not affected by wind turbine circuit oscillations during operation.
作为可选的实施方式，低通滤波器4与隔离器2的输出端连接，用于截止高于预定频率的信号通过；模数转换器5的输入端与低通滤波器4的输出端连接，用于将输出信号转换为数字信号；ARM处理器6与模数转换器5输出端连接，用于对输出信号执行指令处理。在具体实施例中，低通滤波器4限制采集到的振动信号的频率范围，模数转换器5将采集到的振动信号从模拟信号转换为数字信号，便于ARM处理器6对该振动信号进行运算、分析和存储处理。As an optional implementation manner, the low-pass filter 4 is connected to the output end of the isolator 2 to cut off the passage of signals higher than a predetermined frequency; the input end of the analog-to-digital converter 5 is connected to the output end of the low-pass filter 4 , which is used to convert the output signal into a digital signal; the ARM processor 6 is connected to the output end of the analog-to-digital converter 5 for executing instruction processing on the output signal. In a specific embodiment, the low-pass filter 4 limits the frequency range of the collected vibration signal, and the analog-to-digital converter 5 converts the collected vibration signal from an analog signal to a digital signal, which is convenient for the ARM processor 6 to perform the analysis on the vibration signal. Computation, analysis and storage processing.
作为可选的实施方式，运算放大器7接在隔离器2和低通滤波器4之间，用于将输出信号的幅值限定在预定范围内。在具体实施例中，运算放大器7的输出端与同向输入端接地连接；在具体实施方式中，运算放大器7的输入级与输出级无公共端，切断共模回路带来的干扰；此外，利用隔离器2和运算放大器7的限幅特性，将信号幅值限定在一个安全的范围内，防止后续电路被雷击损坏。As an optional implementation manner, the operational amplifier 7 is connected between the isolator 2 and the low-pass filter 4 to limit the amplitude of the output signal within a predetermined range. In a specific embodiment, the output terminal of the operational amplifier 7 is grounded with the same-direction input terminal; in a specific embodiment, the input stage and the output stage of the operational amplifier 7 have no common terminal, which cuts off the interference caused by the common mode loop; in addition, Using the amplitude limiting characteristics of the isolator 2 and the operational amplifier 7, the signal amplitude is limited within a safe range to prevent subsequent circuits from being damaged by lightning strikes.
作为可选的实施方式，存储器8与ARM处理器6连接，用于存储经ARM处理器6处理的输出信号。在具体实施例中，存储器设置在ARM处理器6外部；或者与ARM处理器6封装为一体。As an optional implementation manner, the memory 8 is connected to the ARM processor 6 for storing the output signal processed by the ARM processor 6 . In a specific embodiment, the memory is arranged outside the ARM processor 6; or is packaged together with the ARM processor 6 as a whole.
作为可选的实施方式，存储器8包括RAM和/或FLASH芯片。As an optional embodiment, the memory 8 includes RAM and/or FLASH chips.
作为可选的实施方式，光耦合器9一端连接ARM处理器6的输出端，另一端连入局域网和/或远程控制平台。在具体实施例中，光耦合器9将ARM处理器6输出端与局域网和/或远程控制平台之间实现电-光-电的隔离传输，切断了这段传输电路的干扰信号源。As an optional implementation manner, one end of the optical coupler 9 is connected to the output end of the ARM processor 6, and the other end is connected to a local area network and/or a remote control platform. In a specific embodiment, the optocoupler 9 realizes electrical-optical-electrical isolation transmission between the output end of the ARM processor 6 and the local area network and/or the remote control platform, and cuts off the interference signal source of this transmission circuit.
根据本发明实施例提供的风力发电机组信号采集电路，信号采集器对风力发电机组的输出信号进行采集，隔离器对采集到的信号进行隔离，切断了采集电路的干扰信号源，增强了风力发电机组信号采集电路的抗干扰性。According to the wind turbine signal acquisition circuit provided by the embodiment of the present invention, the signal collector collects the output signal of the wind turbine, the isolator isolates the collected signal, cuts off the interference signal source of the acquisition circuit, and enhances wind power generation. The anti-interference of the signal acquisition circuit of the unit.
虽然结合附图描述了本发明的实施例，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作出各种修改和变型，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, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present invention, such modifications and variations falling within the scope of the appended claims within the limited range.
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