CN106680618A - Measuring device and measuring method for impulse intensity of EMI measuring system - Google Patents

Measuring device and measuring method for impulse intensity of EMI measuring system Download PDF

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Publication number
CN106680618A
CN106680618A CN201611019471.2A CN201611019471A CN106680618A CN 106680618 A CN106680618 A CN 106680618A CN 201611019471 A CN201611019471 A CN 201611019471A CN 106680618 A CN106680618 A CN 106680618A
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pulse
broadband
oscilloscope
emi
measuring
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汪桃林
范凤军
陈斌
谢恒贵
马秋萍
戴利剑
曹焕丽
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Shanghai Aerospace Exploration Media Technology Co Ltd
Shanghai Academy of Spaceflight Technology SAST
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Shanghai Aerospace Exploration Media Technology Co Ltd
Shanghai Academy of Spaceflight Technology SAST
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/001Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The invention discloses a measuring device and a measuring method for impulse intensity of an EMI measuring system. The measuring device comprises a broadband attenuator, a broadband oscilloscope and a PC machine. The broadband attenuator conducts attenuation treatment on an impulse signal; the impulse signal obtained after the attenuation treatment is collected by the broadband oscilloscope; The PC machine controls the broadband oscilloscope to automatically intercept a single impulse waveform and calculate the impulse intensity. The measuring device and the measuring method for the impulse intensity of the EMI measuring system can measure the impulse intensity parameter quickly.

Description

EMI测量系统脉冲强度测量装置及测量方法EMI measuring system pulse strength measuring device and measuring method

技术领域technical field

本发明涉及无线电电子学的电磁兼容领域,特别涉及EMI测量系统脉冲强度测量装置及测量方法。The invention relates to the electromagnetic compatibility field of radio electronics, in particular to a pulse strength measuring device and a measuring method of an EMI measuring system.

背景技术Background technique

随着武器型号系统的发展,系统中各种先进的电子设备越来越多,系统空间的电磁环境越来越复杂,电磁干扰对整个电子系统造成严重的影响。为了使电子系统能够稳定、可靠地工作,必须对系统中的部件进行电磁兼容测试,评估其是否满足总体电磁兼容设计的要求。电磁兼容测量设备的计量显得十分迫切。With the development of the weapon model system, there are more and more advanced electronic devices in the system, and the electromagnetic environment in the system space is becoming more and more complex. Electromagnetic interference has a serious impact on the entire electronic system. In order to make the electronic system work stably and reliably, the components in the system must be tested for electromagnetic compatibility to evaluate whether they meet the requirements of the overall electromagnetic compatibility design. The measurement of electromagnetic compatibility measuring equipment is very urgent.

国内每年举行电磁兼容测量试验室之间的比对, EMI测量系统中脉冲强度成为试验室之间测量不确定度的一个重要来源。根据国际标准CISPR16-1-1,将脉冲强度定义为某一脉冲电压对时间积分的面积,并按照工作频率将工作频段划分为4个波段,分别是 A波段(9 kHz~150kHz)、B波段(0.15MHz~30MHz)、C波段(30MHz~300MHz)、D波段(300MHz~1000MHz),同时规定各个波段输出脉冲信号要求,具体见表1。The comparison between electromagnetic compatibility measurement laboratories is held every year in China, and the pulse strength in the EMI measurement system has become an important source of measurement uncertainty between laboratories. According to the international standard CISPR16-1-1, the pulse intensity is defined as the area of a certain pulse voltage integrated with time, and the working frequency band is divided into 4 bands according to the working frequency, which are A band (9 kHz~150kHz), B band (0.15MHz~30MHz), C-band (30MHz~300MHz), D-band (300MHz~1000MHz), while specifying the output pulse signal requirements of each band, see Table 1 for details.

表1校准脉冲特性Table 1 Calibration Pulse Characteristics

综上,对脉冲强度参数的快速测量,是解决EMI测量系统脉冲强度的量值溯源的重要问题。In summary, the rapid measurement of pulse intensity parameters is an important problem in solving the traceability of the pulse intensity of the EMI measurement system.

发明内容Contents of the invention

本发明解决的问题是现有技术中需要一种可以实现对脉冲强度快速测量的技术;为解决所述问题,本发明提供一种EMI测量系统脉冲强度测量装置及测量方法。The problem solved by the present invention is that a technology that can realize rapid measurement of pulse strength is needed in the prior art; in order to solve the problem, the present invention provides a pulse strength measurement device and a measurement method for an EMI measurement system.

本发明提供的EMI测量系统脉冲强度测量装置包括:宽带衰减器、宽带示波器、PC机;宽带衰减器对脉冲信号作衰减处理;宽带示波器采集衰减处理后的脉冲信号,并计算脉冲强度;PC机控制宽带示波器。The EMI measurement system pulse strength measurement device provided by the invention comprises: broadband attenuator, broadband oscilloscope, PC; The broadband attenuator performs attenuation processing to pulse signal; The pulse signal after broadband oscilloscope collection attenuation process, and calculates pulse strength; PC Control a wideband oscilloscope.

进一步,所述宽带衰减器的峰值功率不小于100W。Further, the peak power of the broadband attenuator is not less than 100W.

进一步,所述宽带示波器的带宽大于11.7GHz。Further, the bandwidth of the broadband oscilloscope is greater than 11.7GHz.

本发明还提供采用所提供的EMI测量系统脉冲强度测量装置的脉冲强度测量方法,包括:步骤一、宽带衰减器采集EMI测量系统输出的脉冲信号,并进行衰减处理;步骤二、宽带示波器采集衰减处理后的脉冲信号,并计算脉冲强度;步骤三、根据采集的脉冲波形数据自动截取单脉冲波形并计算脉冲强度。The present invention also provides the pulse strength measurement method that adopts the provided EMI measurement system pulse strength measuring device, comprising: step 1, the pulse signal that the broadband attenuator collects the EMI measurement system output, and carries out attenuation processing; Step 2, the broadband oscilloscope collects the attenuation The processed pulse signal, and calculate the pulse intensity; step 3, automatically intercept the single pulse waveform and calculate the pulse intensity according to the collected pulse waveform data.

进一步,所述步骤三单脉冲波形自动截取。首先,通过控制示波器单次触发获取多周期脉冲波形,并对脉冲波形数据作数值微分,根据数值微分结果判断脉冲边沿,最后,根据脉冲边沿,截取单脉冲波形。Further, the single-pulse waveform in step 3 is automatically intercepted. First, the multi-period pulse waveform is obtained by controlling the oscilloscope to trigger once, and the pulse waveform data is numerically differentiated, and the pulse edge is judged according to the numerical differentiation result. Finally, the single pulse waveform is intercepted according to the pulse edge.

本发明的优点包括:通过宽带衰减及脉冲波形自动截取技术智能截取EMI校准脉冲波形并获得脉冲强度结果,实现对脉冲强度参数的快速测量,解决EMI测量系统脉冲强度的量值溯源问题。The advantages of the present invention include: intelligently intercepting EMI calibration pulse waveforms and obtaining pulse intensity results through broadband attenuation and pulse waveform automatic interception technology, realizing rapid measurement of pulse intensity parameters, and solving the problem of traceability of pulse intensity in EMI measurement systems.

附图说明Description of drawings

图1是本发明实施例提供的EMI测量系统脉冲强度测量装置的原理框图;Fig. 1 is the functional block diagram of the EMI measuring system pulse intensity measuring device that the embodiment of the present invention provides;

图2是本发明实施例提供的EMI测量系统脉冲强度测量方法的流程示意图。Fig. 2 is a schematic flowchart of a method for measuring pulse strength in an EMI measurement system according to an embodiment of the present invention.

具体实施方式detailed description

下文中,结合附图和实施例对本发明进行详细阐述。Hereinafter, the present invention will be described in detail with reference to the drawings and embodiments.

如图1所示,本发明实施例提供的EMI测量系统脉冲强度测量装置的包括: 宽带衰减器1、宽带示波器2、PC机3;宽带衰减器1采集EMI测量系统中的脉冲信号,对脉冲信号作衰减处理;宽带示波器2采集衰减处理后的脉冲信号,并计算脉冲强度;PC机3控制宽带示波器1。As shown in Figure 1, the EMI measuring system pulse intensity measuring device that the embodiment of the present invention provides comprises: broadband attenuator 1, broadband oscilloscope 2, PC 3; Broadband attenuator 1 gathers the pulse signal in EMI measuring system, to pulse The signal is attenuated; the broadband oscilloscope 2 collects the attenuated pulse signal and calculates the pulse intensity; the PC 3 controls the broadband oscilloscope 1 .

考虑到EMI测量系统脉冲信号幅度高,不能直接采集波形数据,需对脉冲信号作衰减处理。取脉冲信号幅度最大值64V,计算其峰值功率为81.9W,但是由于其脉宽窄,占空比极小,尽管脉冲信号的幅度很高,但它的有效能量很小。故本发明的实施例中选取峰值功率不小于100W的宽带衰减器。Considering the high pulse signal amplitude of the EMI measurement system, the waveform data cannot be collected directly, and the pulse signal needs to be attenuated. Taking the maximum pulse signal amplitude of 64V, its peak power is calculated to be 81.9W. However, due to its narrow pulse width and extremely small duty cycle, although the pulse signal has a high amplitude, its effective energy is very small. Therefore, in the embodiment of the present invention, a broadband attenuator with a peak power not less than 100W is selected.

宽带示波器2通过与宽带衰减器1连接的端口采集衰减后的脉冲波形,针对脉冲信号脉宽窄,占空比小的特点,数据采集需使用宽带示波器。脉冲信号脉宽最小为380ps,按照上升时间30ps计算,信号带宽=0.35/t=11.7GHz,为满足测量需求,需选用带宽大于11.7GHz的宽带示波器实现脉冲数据采集,从而保留原始信号丰富的频谱信息。The broadband oscilloscope 2 collects the attenuated pulse waveform through the port connected to the broadband attenuator 1. For the pulse signal with narrow pulse width and small duty cycle, a broadband oscilloscope is required for data collection. The minimum pulse width of the pulse signal is 380ps, calculated according to the rise time of 30ps, the signal bandwidth = 0.35/t = 11.7GHz, in order to meet the measurement requirements, it is necessary to use a broadband oscilloscope with a bandwidth greater than 11.7GHz to achieve pulse data acquisition, thereby retaining the rich spectrum of the original signal information.

PC机通过与宽带示波器连接的端口控制宽带示波器自动截取脉冲波形。脉冲强度的计算主要关注正脉冲波形,而EMI测量系统的脉冲信号占空比极小,势必增加脉冲波形获取难度。为此通过示波器自动触发与脉冲边沿自动获取的方法实现正脉冲波形的获取,并通过数值积分计算脉冲强度。The PC controls the wideband oscilloscope to automatically intercept the pulse waveform through the port connected to the wideband oscilloscope. The calculation of pulse strength mainly focuses on the positive pulse waveform, and the pulse signal duty cycle of the EMI measurement system is extremely small, which will inevitably increase the difficulty of obtaining the pulse waveform. For this purpose, the acquisition of the positive pulse waveform is achieved by means of automatic triggering of the oscilloscope and automatic acquisition of the pulse edge, and the pulse intensity is calculated by numerical integration.

图2,所示为采用本发明所提供的EMI测量系统脉冲强度测量装置的脉冲强度测量方法流程图。Fig. 2 is a flowchart of a pulse strength measurement method using the pulse strength measurement device of the EMI measurement system provided by the present invention.

本发明虽然已以较佳实施例公开如上,但其并不是用来限定本发明,任何本领域技术人员在不脱离本发明的精神和范围内,都可以利用上述揭示的方法和技术内容对本发明技术方案做出可能的变动和修改,因此,凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化及修饰,均属于本发明技术方案的保护范围。Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the methods disclosed above and technical content to analyze the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made in the technical solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention, which do not depart from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. protected range.

Claims (5)

1.EMI测量系统脉冲强度测量装置,其特征在于,包括:宽带衰减器、宽带示波器、PC机;宽带衰减器对脉冲信号作衰减处理;宽带示波器采集衰减处理后的脉冲信号,保留脉冲信号丰富的频谱信息;PC机控制宽带示波器自动截取脉冲波形数据。1. The EMI measurement system pulse strength measuring device is characterized in that it includes: a broadband attenuator, a broadband oscilloscope, and a PC; the broadband attenuator performs attenuation processing on the pulse signal; The spectrum information; the PC controls the broadband oscilloscope to automatically intercept the pulse waveform data. 2.依据权利要求1所述的EMI测量系统脉冲强度测量装置,其特征在于,所述宽带衰减器的峰值功率不小于100W,带宽不小于3GHz,一般的示波器探头带宽小于1GHz,无法满足测量要求。2. according to the described EMI measuring system pulse intensity measuring device of claim 1, it is characterized in that, the peak power of described broadband attenuator is not less than 100W, and bandwidth is not less than 3GHz, and general oscilloscope probe bandwidth is less than 1GHz, can't satisfy measurement requirement . 3.依据权利要求1所述的EMI测量系统脉冲强度测量装置,其特征在于,所述宽带示波器的带宽大于11.7GHz。3. According to the EMI measurement system pulse strength measuring device according to claim 1, it is characterized in that, the bandwidth of the broadband oscilloscope is greater than 11.7GHz. 4.采用权利要求1至3中任意一项所提供的EMI测量系统脉冲强度测量装置的脉冲强度测量方法,其特征在于,包括:步骤一、宽带衰减器采集EMI测量系统输出的脉冲信号,保留脉冲信号丰富的频谱信息;步骤二、宽带示波器采集衰减处理后的脉冲信号,保留脉冲信号边沿信息;步骤三、根据采集的脉冲波形数据自动截取单脉冲波形并计算脉冲强度。4. adopt the pulse strength measurement method of the EMI measurement system pulse strength measuring device provided by any one of claims 1 to 3, it is characterized in that, comprising: step 1, the pulse signal that broadband attenuator gathers EMI measurement system output, retains Rich spectrum information of the pulse signal; step 2, the broadband oscilloscope collects the attenuated pulse signal, and retains the edge information of the pulse signal; step 3, automatically intercepts the single pulse waveform and calculates the pulse intensity according to the collected pulse waveform data. 5.依据权利要求4所述的脉冲强度测量方法,其特征在于,所述步骤三单脉冲波形自动截取技术。首先,通过控制示波器单次触发获取多周期脉冲波形,并对脉冲波形数据作数值微分,根据数值微分结果判断脉冲边沿,最后,根据脉冲边沿,截取单脉冲波形。5. The method for measuring pulse strength according to claim 4, characterized in that said step 3 is a single pulse waveform automatic interception technique. First, the multi-period pulse waveform is obtained by controlling the oscilloscope to trigger once, and the pulse waveform data is numerically differentiated, and the pulse edge is judged according to the numerical differentiation result. Finally, the single pulse waveform is intercepted according to the pulse edge.
CN201611019471.2A 2016-11-17 2016-11-17 Measuring device and measuring method for impulse intensity of EMI measuring system Pending CN106680618A (en)

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CN1055607A (en) * 1990-03-30 1991-10-23 上海新亚无线电厂 A kind of high-precision pulse power measurement and device
JPH1151974A (en) * 1997-07-31 1999-02-26 Nec Home Electron Ltd Probe adapter
CN1510426A (en) * 2002-12-16 2004-07-07 伟 吴 Electromagnetic interference diagnostic method and system
CN103487788A (en) * 2013-09-03 2014-01-01 中国电子科技集团公司第四十一研究所 Method for rapidly and automatically extracting train pulse signals
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Application publication date: 20170517