详解什么是数据采集系统，探讨如何优化数据采集 (DAQ) 的测量速度

时间： 2024-06-15 来源：是德科技 Keysight Technologies知乎

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什么是数据采集系统？DAQ是什么意思?

数据采集系统（Data Acquisition - DAQ）由一组硬件和软件组成，可使用传感器或转换器对电压、电流、温度和应力等物理参数进行采样。这个系统能够帮助工程师调理样本并将其转换为数字数据，以便进行捕获、实时监控和分析。

如何使用数据采集系统？

DAQ系统通常有三大用途：表征产品、监控过程或产品，以及控制测试过程。

静态DAQ和动态DAQ有什么区别？

静态DAQ通常在扫描每个输入通道时进行单次测量。它以固定采样率进行一次或多次测量（如果有多个输入通道），适用于缓慢变化的测量（如温度或湿度测量）。而动态DAQ会以快速连续的方式对其每个输入通道进行多次测量，捕获快速变化的信号，例如振动、声学或结构应力信号。

DAQ数据记录仪有什么作用？

数据记录仪根据扫描间隔和数据记录周期来捕获并记录数据。DAQ系统可以通过多路输入通道开关多路复用器、内置信号调理器和控制系统高效地执行数据记录，帮助您自动捕获来自传感器的信号。

动态数据采集系统可以带来什么好处？

动态数据采集系统可以使用其内置硬件信号数字化仪，以高采样率对单个或多个传感器的动态信号进行采样。因此，它可以捕获电压、电流、振动或结构应力变化的瞬态信号。现代DAQ内置了快速傅里叶变换（FFT）数学算法，可将时域信号显示转换为频域信号显示。工程师随后可以在时域和频域中分析动态信号。

如何优化数据采集 (DAQ) 的测量速度?

数据采集（DAQ）硬件在测量精度和速度方面具有一定的局限性。测量精度和测量速度之间存在折衷。当测量速度和事务处理速度的重要性高于对精度的需要时，有以下几点需要考虑。市面上有许多数据采集系统。开发人员通常会选择大型DAQ主机系统来提升性能，但这样做的成本非常高。这通常是一种过度投资，为自己并不需要的测量性能付出更多成本。本白皮书将向您展示如何对中端DAQ系统（是德科技的DAQ970A系统）的测量速度进行优化，以满足大多数设计验证测试的要求。您将学习如何选择合适的硬件和配置设置来帮助您优化测量和事务速度。

选择正确的多路复用器

中端主机DAQ970A为接口模块提供3个插槽。该主机具有用于远程连接的局域网和USB接口。就通过接口的读取速度而言，局域网和USB每秒可以轻松地远程传输5000个读数。若非数据采集系统的其他部分有吞吐量限制，它可以实现更高的读取速度。那么，DAQ系统的速度瓶颈在哪里？DAQ主机不会带来速度瓶颈。瓶颈来自多路复用器接口模块的机械开关速度。

配置硬件以提高阅读速度的技巧

-减少系统开销：

优化测量速度的方法之一是减少不必要的系统开销。在自动测试期间，您无需运行DAQ主机的显示器和信号器。这些会占用DAQ系统的处理时间。您可以使用远程命令禁用整个前面板显示。

-选择DAQ数字万用表分辨率：

选择数字万用表（DMM）分辨率可为您提供所需的详细信息。您需要正好足够的精度，但如果设置为6.5位数而您需要的只是5.5位数，则会浪费处理时间，导致不必要地浪费测量时间。

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本文由Vicky转载自是德科技 Keysight Technologies知乎，原文标题为:什么是数据采集系统？如何优化数据采集 (DAQ) 的测量速度?，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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Keysight（是德科技）测试仪器分销产品选型指南（英文）

目录- BenchVue Control and Analysis Software RF Bench and Handheld Instruments Handheld Spectrum Analyzers FieldFox Handheld Analyzers Spectrum Analyzers, Signal Analyzer Audio Analyzer and Signal Generator Power Sensors and Power Meters RF and Microwave Test Accessories Vector Network Analyzers and ECal Modules Essential Bench Oscilloscopes, Applications, and Probes Digital Multimeters Function/Arbitrary Waveform Generators Data Acquisition/Switch Units USB Products and Connectivity Frequency Counters/Timers Power Supplies Bench Power Supplies System Power Supplies Precision Power Supplies System Power Supplies(continued) DC Power Analyzer, SMUs, and DC Electronic Loads AC Power Sources LCR Meters Handheld Instruments

型号- U8480,B2911A,U1272A,N8926A,34460A,N7040A,U8000,N9340B,53140,N5742A,N5766A,34905A,N9918A,N6735B,N8480,N5743A,N5767A,N1914A,3024T,3012T,U1273A,34904A,N6746B,N6734B,U3800,U1282A,N8948A,34470A,N7042A,N1913A,N5744A,N5768A,34903A,N8924A,N9916A,N9928A,34939A,N6701C,N8949A,U1271A,N8925A,N8937A,N7041A,N1912A,N9000B,N5745A,N5769A,N2819A,3022T,3034T,N6700C,34902A,N9917A,34938A,N6736B,U1600,8491A,DSOX1102G,DSOX1102A,N9320B,P-SERIES,33509B,N7020A,N1911A,N9344C,N5746A,N3302A,N2818A,34901A,34937A,U1701B,82357B,U1273AX,U2802A,N5181B,N2142A,U1281A,B2902A,4024A,N5747A,N3303A,8490G,N2805A,3032T,N6702C,U1700,N6705C,N8928A,N9342C,33519B,B2901A,N3304A,N5748A,34947A,N2804A,N8929A,N5171B,N9343C,N2140A,X-SERIES,B2912A,N3305A,U8903B,N5749A,4022A,34934A,4034A,34946A,8480D,3054T,U2702A,N3306A,U1733C,U1210,U2300,N5700,34945A,3458A,TU1453A,U2701A,B2962A,1146B,N3307A,1147B,N7026A,33600A,33612A,B2961A,N9322C,N9310A,U1731C,2002A,53200,2014A,3104T,U1610A,U2723A,33611A,2004A,U1732C,J7205A,34942A,U3606B,53210A,J7205B,U2722A,N1810UL,33622A,3102T,34941A,N8760A,2012A,2024A,U2500,U1620A,33512B,33500B,33621A,N1810TL,3004A,N6700,N6705,N8761A,N2821A,33511B,N3300,4104A,2022A,N2820A,U2600,33510B,33522B,3014T,N2843A,E36100B,33521B,N9962A,87106D,AC6804B,E4982A,DAQM905A,34950A-34959A,N6750,N9950A,N8740A,E36103B,U2020,EDUX1002A,N9951A,33520B,N7007A,83050A,N2962A,53131A,P9243A,E4981A,U2741A,34972A,E36102B,J7211B,J7211A,J7211C,E36320A,N8741A,AC6802B,DAQM903A,U1270,N9960A,E36311A,N8762A,E36105B,N6781A,U2000,E3641A,EDUX1002G,N2863B,AC6803B,DAQM904A,N8900,U1280,84904L,U2751A,34970A,N9961A,B2900,E36104B,E3640A,AC6800B,N2862B,6002A,E3600,E-SERIES,E36313A,DAQM900A,U1250,U5850,N8756A,N8732A,N8950A,AC6801B,10070D,DAQM902A,U2761A,34980A,E36300A,E36312A,N6782A,DAQM901A,E36106B,53220A,N8757A,87222D,N8733A,N8951A,87222E,N9952A,87104D,P9242A,E4980A,6004A,53132A,N6785A,N6773A,U1452A,B2980A,N6761A,N8754A,N8742A,P9241A,N2871A,53230A,N8700,N4985A-S50,U1240,N6784A,E4981A-001,E4981A-002,N8755A,U1453A,N8731A,N2870A,8495D,N2797A,87405B,N2894A,N5770A,8495B,87405C,34420A,E3647A,10833F,34921A-25A,10833G,10833A,10833B,4154A,10833C,10833D,N6775A,U1450A,N8736A,N6763A,U1232A,N8954A,N6751A,N8930A,N7550,N9923A,N2796A,N9935A,N2893A,N5771A,E36100,E3646A,6811C,N4985A-S30,4032A,N8737A,N6786A,N6774A,N8943A,N6762A,E5063A,10834A,N8955A,U1451A,8494G,N8931A,E3634A,U1233A,3052T,N2783B,P9371A,N2795A,N5772A,6813C,E3649A,6800C,6812C,N6753A,N8758A,U1460A,N6741B,U1242C,N8734A,U1242B,N8952A,N6777A,N8940A,N6765A,P9370A,N2891A,N2782B,EPM SERIES,53181A,N5761A,34931A-33A,34465A,E3648A,4054A,N8759A,N6764A,U1231A,U1461A,N6752A,E9320,83020A,N8735A,N8941A,N6776A,N2793A,DAQ970A,N2890A,L2060,N2781B,U1240C,N9914A,82350C,N5750A,N5762A,U2063,E5810B,N8934A,N6743B,N9926A,P1912A,N8946A,N6731B,N9938A,U1252B,E3643A,E3631A,N6755A,14585A,N2792A,N2780B,U1241C,N5763A,E4980AL,N5751A,E36300,E9300,N8923A,N9915A,N8935A,N6742B,N9927A,E3630A,U1241B,4052A,U1253B,E3642A,N6766A,34908A,N6754A,N2791A,N9912A,N8738A,N9936A,U1190,U2040,N5752A,N5764A,34450A,DAQM907A,N8932A,N8944A,34907A,N8920A,E3645A,N6745B,E3633A,N6733B,L2050,N2790A,U1251B,N8739A,N9913A,N9925A,N5741A,DAQM908A,N5765A,34461A,U2053,N8945A,N6732B,N9937A,N8957A,N8921A,E3632A,E3620A,N6756A,E3644A,N6744B

选型指南 - KEYSIGHT - November 2018 PDF 英文下载

KEYSIGHT(是德)示波器/分析仪/发生器/仪表/电源选型指南

描述- The advanced performance, intuitive usability, and versatile functionality of the Keysight InfiniiVision 4000G X-Series oscilloscopes enable you to capture elusive glitches and anomalies that are not possible with other oscilloscopes.

型号- 33521B,B2911B,SR101EDUA,3000G X,PZ2120A,P9377B,PZ2100,34460A,P937XA,DAQM905A,N9324C,1000X,6000 X,3458A,N9918A,EL34143A,33600A SERIES,E36155A,INFINIIUM EXR-SERIES,BV9210B,DAQ973A,EDUX1052A,N9935C,B2962B,PZ2121A,P93XXB,DAQ73A,EL30000 SERIES,E5063A,E36154A,3000X,P9371B,P9371A,33600A,PZ2130A,B2961B,33612A,34470A,DAQM903A,B2960B SERIES,N9322C,N9960A,E36311A,6000X,E36731A,PZ2100 SERIES,E36731ABV,P9370A,P9382B,3000G X-SERIES,P9370B,PZ2131A,33611A,B2960B,33500B SERIES,DAQM904A,N9323C,34465A,B2901BL,DAQ,2000 X,EL34243A,DAQ970A,E36150 SERIES,P9373B,E36150,E36300 SERIES,33622A,EDU33211A,P9373A,33509B,2000X,DAQM909A,1000 X,E36313A,1000 X-SERIES,DAQM900A,E36232A,33512B,P9372A,P9384B,33621A,P9372B,33500B,N5181B,4000G X,N9915C,N9321C,DAQM902A,N6700,E36200 SERIES,B2902B,E36300,4000X,2000 X-SERIES,E36312A,DAQM901A,E36231A,6000 X-SERIES,N9952A,N6705C,B2901B,33511B,N5166B,N9912C,BV9211B,P9375B,B2900B SERIES,PZ2110A,P9375A,33519B,EDU36311A,DAQM907A,EL30000,E36234A,B2910BL,35520B,4000G X-SERIES,33510B,B2900B,B2912B,33522B,EDU33212A,P9374A,N5171B,P9374B,INFINIIUM EXR,EDU34450A,X-SERIES,DAQM908A,E36200,34461A,E36233A

选型指南 - KEYSIGHT - February 16, 2024 PDF 英文下载

Agilent 34401A 6½ 数字万用表快速入门指南

型号- AGILENT 34401A 6½

用户指南 - KEYSIGHT - 2008年7月 PDF 中文下载

【选型】Keysight（是德科技）通用及基础测量仪器样本

目录- 示波器和探头数字万用表数字采集和开关频率计数器、函数和任意波形发生器电源射频仪表

型号- U1272A,34460A,34133A,53140,N5742A,N5766A,E4980ALU-050,N2919A,N576XA,N5439A,6644A,661XC-220,54600S,34905A,3446MEMU,3000X,U2700,N674XB,34132A,34132B,53150,N5743A,53151,N5767A,661XC-OL2,664XA,3024T,N2918A,6621A,3000T,53152,6645A,N2918B,N9310A-1CM,661XC-230,U1273A,34904A,U1620,E364XA-1CM,N6746B,3000X,DSOXGPIB,N8948A,1000,34131A,DSOX4AUTO,N5744A,N5768A,N2917B,6622A,N3300A,8120-4383,TPS://WWW.SEKORM.COM/WEB/SEARCH/KEYWORDN2801A,34903A,663XB-0B3,DSOX4SENSOR,N8900A,66102A,N6701A,E5387A,66000,U1271A,N8949A,66002A 66001A,11059A,6624A,N5745A,668XA-0B3,8120-5488,N5769A,3022T,6623A,N3301A,33500,8120-5489,34902A,66101A,N9340B-AMA,N2916B,U1600,N6700B,33509B,N7020A,6625A,DSOXLAN,4000X,N3302A,N5746A,8120-5413,8120-6502,N2874,8120-5412,N574XA,U1604A,8120-6980,34901A,34925A,66104A,8120-6507,N2915A,8120-5414,U2802A,66321D,N9310A-1HB,DSO1072B,66321B,663XB-760,B2902A,4000X,6626A,N3303A,N5747A,8120-5421,N2829A,N2862,600,66103A,34924A,N2805A,N6702A,N6705B,N9330B,668XA-909,B2901A,6627A,668XA-908,N3304A,U1602A,N2828A,N5748A,34923A,34947A,8120-8705,N2804A,66106A,6628A,891A,669XA-0L2,N3305A,N5749A,34922A,E5805A,34946A,N2827A,60XX-220,N2803A,66105A,U8001A,DSOX4EMBD,N2849A-68701,1000B,3000,1000A,TPS://WWW.SEKORM.COM/WEB/SEARCH/KEYWORD54600S,N3306A,DSOX4MASK,U1600A,U1210,N2791A/N2891A,34921A,6575A,34945A,1158A,6551A,6684A,3446SECU,N2826A,5485X,N2802A,E363XA-0L2,1134A,DSO1052B,34172B,N3307A,657XA,U3400,6552A,N2801A,60XX-240,5462X,N2825A,34171B,N9340B-ADP,DSOX2000,33612A,33503A,1131A,N9310A,663XB-8ZJ,U1731B,6553A,N2800A,N3300A-UJ1,N2739A,N2848A,N2824A,8121-0695,8121-0694,DSOX2APPBNDL,33611A,B2960A,U8002A,E4980ALU-201,N33313A,1132A,DSOX2AUTO,8120-43831,U3606A,U1732B,6554A,34942A,681XB-1CP,BNC,1157A,U3606B,5464X,681XB-1CM,2000 X,N2738A,DSOX3ADVMATH,6551,N9340B-ABJ,8120-5490,8121-1330,N9340B-ABA,2000X,8121-1331,655XA,8120-8767,53100,8120-8768,34941A,6555A,34832A,663XB-120,N2822A,N9340B-AB2,3000TX,33500B,N5,N9330B-ADP,1130A,U2600A,N9340B-PA3,DSOX3EMBD,200,6641A,669XA-0B3,1131.,N2821A,DSOX3MASK,4000 X,5000,N3300,AC6800,6642A,34830A,N7900,N2820A,N2759A,33522A,33522B,1180CZ,663XB-100,DSOX4COMP,N9310A-1T,N9340B-TG3,6643A,N2867A,N2843A,U1401B,N9340B-INM,AC6804A,DSOX3AUDIO,34840B,DSOX4FLEX,669XA-908,669XA-909,N2733A,N2866B,N2733B,3458A-002,DSOX2EMBD,3458A-001,E2695A,DSO1012A,34972A,N9310A-1TC,60001,N2889A,N2756A,6063B-020,N2732A,AC6802A,6000A,U1270,6000X,DSO1014A,U1880A,N9340B-TAD,90000 X,663XB-020,N2779A,N2888A,6000L,DSOX3COMP,E2697A,N2863B,AC6803A,U2751A,34970A,L4411A,6000X,34401A,N9330B-202,N9330B-203,U1881A,N9330B-201,N2778A,N2887A,54826,8120-1689,7000,N2862B,E4980A-710,668XA-208,54830,U1250,DSOXEDK,6571A,681XB-208,N875XA,N2777A,6680A,N8756A,N8732A,N8950A,TPS://WWW.SEKORM.COM/WEB/SEARCH/KEYWORD1163A,E3610-17A,AC6801A,DSOX3FLEX,681XB-200,10070D,N2885A,N2752A,N5440A,E3451B,81180A,U2531A,54600,6572A,E4980AL-100,6681A,N8757A,N2776A,U3402A,N8733A,53147A,8120-2956,N8951A,681XB-230,N2884A,N2751A,N7971A,DSO1102B,6641A-45A,DSOX2COMP,64997A,6682A,U1230,6573A,U3401A,N6773A,B2980A,N8754A,N7970A,N2750A,DCA-J 86100D,53230A,6813B-019,N5442A,6631BA,8120,6574A,6683A,54620,U1240,N8755A,5484X,N8731A,N2797A,N5770A,N2882A,N873XA,N5443A,34420A,N7973A,10073D,DSOXDVM,E2678A,80000,N28,N6775A,N8736A,8120-2104,N6751A,N8954A,DSOX4PWR,N2881A,E2655C,6063B,N2796A,N5444A,P66321B,N5771A,6812B,N7972A,10074D,E2679A,N5468A,N9340B-XDM,6811B,11053A,9000X,N8737A,N6774A,DSOX3MSO,N8955A,E3634A,N2771B,N2880A,DSOXPERFMSO,N6450,N2795A,N5772A,N5469A,9000,6813B,N5445A,U2356A,8121-6203,N7951A,N6459,N6753A,N8758A,U1242B,N6971A,N8734A,33220A,N8952A,N6777A,681XB-026,53181A,681XB-020,U2331A,661XC-760,10072A,N7950A,60XX-0B3,U2355A,N7974A,DSOX4AUDIO,34465A,E5813A,34138A,E4356A-909,E4356A-908,U1461A,N8759A,N6752A,N6970A,N8735A,N677XB,N6776A,N2793A,N9340B-IBC,U1591A,11058A,U2354A,N5750A,N7953A,N7977A,N5447A,N5423A,E5810B,E5810A,N6731B,N6973A,N2914,DSOX4APPBNDL,661XC-0B3,E3631A,N6755A,N2792A,DSOX3VID,E2675A,DSOX2MASKM,34330A,U2353A,N7976A,E4980AL,N5751A,N9340B-1TC,N5448A,N5424A,N7952A,34136A,DSOX2SEM,N3331A,N6972A,U1241B,E3630A,DSOX4AERO,34908A,N6754A,E2676A,N2791A,N9330B-1TC,N8738A,10075A,U2352A,N5752A,N5425A,U1452AT,3000T X,N577XA,N5449A,DSOXT3DVMCTR,7000B,TPS://WWW.SEKORM.COM/WEB/SEARCH/KEYWORD10076C\,3000 X,U2700 USB,U1177A,N6951A,E363XA-1CM,N2836A-68701,34907A,E3633A,N6733B,E2677A,N9310A-001,N2790A,N675XA,66000A-909,E4980A-301,N8739A,66000A-908,N7954A,10076B,34134A,10076C,U2351A,N5426A,34461A,66319B,8120-4753,N6732B,N6950A,N8957A,E3632A,34906A,N6756A,N6974A,66319D,N9330B-BCG,B2911A,N2111A,8120-5570,N9340B,E2614A,1161A,DSOX3AERO,6632B,8120-5572,N1022B,8120-5573,33250A,54830S,8120-5337,N6735B,N6977A,N6711A,N6953A,661XC-100,1162A,E2615A,6633B,34945EXT,N9330B-BAT,3012T,8120-5342,N6710B,66002A,N6976A,90000Z,N6734B,N6952A,DSOX4WAVEGEN2,90000X,U8031A,663XB-1CM,90000Q,663XB-1CP,34470A,E2616A,N575XA,6634B,8120-6204,661XC-120,90000A,66332A,6651A-55,DSOX2WAVEGEN,34939A,N673XB,1132,1131,82351A,1160A,N2819A,6611C,3034T,N5406A,8120-8871,66000A-0L2,34938A,N6736B,N6954A,N6712A,90000,E5396A,N9320B,6612C,N2818A,E

选型指南 - KEYSIGHT - 2015 - 2015年06月10日 PDF 中文下载

产品型号	品类	描述	Digits of Resolution	基本 1 年 DCV 精度	连通性	测量功能
34470A	数字万用表	数字万用表，七位半，Truevolt DMM	7 ½	0.0016%	LAN,USB,GPIB (optional)	DCV and ACV,DCI and ACI,2- and 4-wire Resistance,Frequency,Capacitance,Diode test,Continuity test,Temperature