目的:自主研制一款超聲手術(shù)刀電源控制系統(tǒng),以減少能量的消耗,維持手術(shù)刀的正常溫度。方法:對超聲換能器在諧振附近的等效電路建立模型,并設(shè)計基于數(shù)字信號處理(DSP)的超聲手術(shù)刀的硬件控制系統(tǒng)。結(jié)果:經(jīng)對電源控制系統(tǒng)的電路和工作性能測試,生成的電流和電壓的有效值等參數(shù),能夠及時調(diào)整電源的頻率,并達到預(yù)期的功能指標,使超聲手術(shù)刀工作在諧振狀態(tài)。結(jié)論:以DSP為核心設(shè)計的超聲手術(shù)刀電源控制系統(tǒng),測試指標均能夠達到預(yù)期的要求,能夠使系統(tǒng)在諧振狀態(tài)下工作。Objective: To independently develop a power control system of ultrasonic scalpel so as to reduce the energy consumption and maintain the normal temperature of ultrasonic scalpel. Methods: In this paper, the model of equivalent circuit of ultrasonic transducer nearby syntony was built up, and the hardware control system of ultrasonic scalpel based on digital signal processing(DSP) was designed. Results: Through testing the circuit and work performance of power control system, the series of parameters such as effective value and so on which were produced by this system could adjust frequency of power source in time and attain anticipative functional indicator, and it took the ultrasonic scalpel to work in syntonic situation. Conclusion: The tested indicators of power control system of ultrasonic scalpel based on the kernel design of DSP can attain anticipative requirement, and can take this system to work in syntonic situation.
標簽：
數(shù)字信號處理
超聲手術(shù)刀
電源控制
上傳時間：
2022-04-03
上傳用戶：bluedrops
基于TMS320F28335的超聲波流量計硬件原理圖+軟件源碼本文以TMS320F28335 處理器為核心，設(shè)計一種用于管道流量測量的超聲波流量計。系統(tǒng)硬件由核心板，超聲波發(fā)射和接收電路，切換電路，超聲換能器，基于ADS805 的高速信號采集電路，人機交互以及電源等模塊構(gòu)成。采用時差法進行管道流量測量，時差測量采用SCOT 加權(quán)的廣義互相關(guān)時延估計算法。本論文設(shè)計的超聲波流量計具有測量速度快、準確性好、成本低等優(yōu)點。關(guān)鍵字：C2000，超聲波，流量，廣義互相關(guān)算法AbstractA kind of ultrasonic flowmeter using for the pipe flow measurement is designed based onTMS320F28335 in this paper. The system hardware consists of the following parts: the core board,ultrasonic signal transmitter and receiver circuits, switch circuit, ultrasonic transducer, signalacquisition circuit based on ADS805, human-computer interaction module and power supplymodule, etc. The system use the method of time difference for pipeline flow measurement and thetime difference is calculated by the time-delay algorithm of SCOT weighted generalizedcross-correlation. The ultrasonic flowmeter has the features of high testing speed, high precisionand low cost, etc.Keywords: C2000,Ultrasonic, Flow, Generalized Cross-Correlation Algorithm
標簽：
tms320f28335
超聲波流量計
上傳時間：
2022-05-06
上傳用戶：
在特殊形狀物體清洗過程中,超聲清洗是一種新型的清洗方法.超聲波發(fā)生器作為超聲清洗電源,是超聲波清洗設(shè)備的重要組成部分.本文針對超聲波發(fā)生器研制中存在的關(guān)鍵技術(shù)問題,分別對主回路、聲學(xué)系統(tǒng)諧振頻率自動跟蹤系統(tǒng)和輸出功率控制系統(tǒng)進行研究和設(shè)計,并且進行了實驗驗證與分析.主回路是超聲波發(fā)生器功率傳輸系統(tǒng),它的可靠性對整個系統(tǒng)十分關(guān)鍵.論文主要對EMI濾波電路、APFC、逆變橋、高頻脈沖變壓器和匹配網(wǎng)絡(luò)進行研究和設(shè)計.在超聲波發(fā)生器中,聲學(xué)系統(tǒng)諧振頻率自動跟蹤技術(shù)是保證輸出效率的關(guān)鍵因素.論文在分析壓電陶瓷換能器在諧振點附近等效電路的基礎(chǔ)上,采用相位控制頻率調(diào)制技術(shù),利用數(shù)字鎖相環(huán)建立了一種新型的包含鑒相、低通濾波、壓控振蕩器、調(diào)節(jié)器的動態(tài)頻率自動跟蹤系統(tǒng),使超聲波發(fā)生器工作在最佳狀態(tài).當被清洗物件放入清洗槽中之后,由于超聲波發(fā)生器的負載發(fā)生了變化,導(dǎo)致其輸出功率隨之降低.這樣就會影響到清洗的效果,為了解決這個問題就必須對輸出功率進行控制.本文巧妙的利用了APFC電壓反饋網(wǎng)絡(luò)可以調(diào)節(jié)輸出電壓的特性,采用單片機控制數(shù)字電位器的方法調(diào)節(jié)APFC的電壓反饋網(wǎng)絡(luò)的參數(shù),從而達到控制輸出功率的目的.在理論分析和電路設(shè)計的基礎(chǔ)上,研制了一臺500W超聲波發(fā)生器樣機.本樣機基本實現(xiàn)了聲學(xué)系統(tǒng)諧頻率自動跟蹤,顯著提高了換能器的轉(zhuǎn)換效率;同時實現(xiàn)了功率控制,降低了超聲波發(fā)生器功率損耗,減少了體積,增加了輸出功率監(jiān)控,促進了較大功率超聲波發(fā)生器的發(fā)展.
標簽：
超聲波發(fā)生器
上傳時間：
2022-05-23
上傳用戶：aben
