【摘要】：軋制力傳感器是安裝在軋機(jī)兩側(cè),在鋼材軋制過(guò)程中用來(lái)測(cè)量軋機(jī)兩端軋制力的大量程稱重傳感器。軋制力參數(shù)是軋機(jī)AGC控制系統(tǒng)的重要參數(shù)之一,對(duì)確保安全生產(chǎn)、防止設(shè)備重大事故、優(yōu)化軋制規(guī)程、實(shí)現(xiàn)生產(chǎn)過(guò)程自動(dòng)化和最優(yōu)控制、保證鋼材軋制質(zhì)量等都具有重要意義。本課題旨在研制出能夠替代進(jìn)口的軋制力傳感器及其測(cè)量系統(tǒng)。(1)參照國(guó)外1750T量程的平板式軋制力傳感器彈性體結(jié)構(gòu),建立了平板式軋制力傳感器的彈性體有限元仿真分析模型,結(jié)合傳感器工作實(shí)際,分析彈性體核心區(qū)應(yīng)力分布情況,通過(guò)考察貼片區(qū)域的貼片中心線,確定了深孔的貼片深度問(wèn)題。(2)根據(jù)平板式軋制力傳感器結(jié)構(gòu)的特殊性,設(shè)計(jì)了一整套完善的貼片工藝方法,包括應(yīng)變片的選型、貼片區(qū)域的打磨方法、夾具的設(shè)計(jì)與安裝等。(3)研制了與平板式軋制力傳感器匹配的16路軋制力信號(hào)測(cè)量系統(tǒng),設(shè)計(jì)了測(cè)量系統(tǒng)上位機(jī)界面,可實(shí)現(xiàn)一條軋機(jī)生產(chǎn)線軋制力數(shù)據(jù)的實(shí)時(shí)顯示、保存、查詢。(4)對(duì)軋制力信號(hào)測(cè)量系統(tǒng)主要誤差產(chǎn)生因素進(jìn)行了理論分析,選擇用曲線擬合的方法對(duì)系統(tǒng)非線性誤差進(jìn)行了補(bǔ)償,采用比率測(cè)量技術(shù)消除供橋電壓波動(dòng)引起的誤差,采用六線制消除長(zhǎng)電纜電阻對(duì)系統(tǒng)帶來(lái)的誤差,采用數(shù)字平均濾波消除電路中散粒噪聲、白噪聲帶來(lái)的誤差。(5)對(duì)軋制力傳感器和信號(hào)測(cè)量系統(tǒng)進(jìn)行了全面實(shí)驗(yàn)驗(yàn)證與分析。結(jié)果表明,研制的軋制力傳感器相關(guān)主要技術(shù)指標(biāo)為:線性度≤1%FS、重復(fù)性≤0.3%FS、滯后≤0.5%FS;測(cè)量系統(tǒng)每個(gè)通道的相對(duì)測(cè)量誤差均不超過(guò)0.6%,達(dá)到預(yù)期設(shè)計(jì)目標(biāo)。
[Abstract]:Rolling force sensor is a large number of range weighing sensors installed on both sides of the mill and used to measure rolling force at both ends of the mill in the rolling process of steel. Rolling force parameter is one of the important parameters of rolling mill AGC control system. It is of great significance to ensure safe production, prevent equipment accidents, optimize rolling schedule, realize automation and optimal control of production process, and ensure rolling quality of steel. The purpose of this paper is to develop the imported rolling force sensor and its measuring system. (1) refer to the foreign 1750T measuring range, the elastic body structure of the flat plate rolling force sensor, The elastomer finite element simulation analysis model of flat plate rolling force sensor is established. According to the actual work of the sensor, the stress distribution in the core region of the elastic body is analyzed, and the patch center line in the patch area is investigated. The depth of the deep hole patch is determined. (2) according to the special structure of the plate rolling force sensor, a complete set of complete patch process methods are designed, including the selection of the strain gauge and the grinding method of the patch area. The design and installation of fixture, etc. (3) A 16-way measuring system of rolling force signal matching with flat plate rolling force sensor has been developed, and the upper computer interface of the measuring system has been designed, which can realize the real-time display of rolling force data in a rolling mill production line. (4) the main error factors of rolling force signal measurement system are analyzed theoretically, and the nonlinear error of the system is compensated by the method of curve fitting. The ratio measurement technique is used to eliminate the error caused by the voltage fluctuation of the supply bridge, the six-wire system is used to eliminate the error caused by the resistance of the long cable to the system, and the digital average filter is used to eliminate the scattered noise in the circuit. Error caused by white noise. (5) all-round experimental verification and analysis of rolling force sensor and signal measurement system are carried out. The results show that the main technical indexes of the developed rolling force sensor are: linearity 鈮，

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