目的:自主研制一款超聲手術刀電源控制系統,以減少能量的消耗,維持手術刀的正常溫度。方法:對超聲換能器在諧振附近的等效電路建立模型,并設計基于數字信號處理(DSP)的超聲手術刀的硬件控制系統。結果:經對電源控制系統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,能夠及時調整電源的頻率,并達到預期的功能指標,使超聲手術刀工作在諧振狀態。結論:以DSP為核心設計的超聲手術刀電源控制系統,測試指標均能夠達到預期的要求,能夠使系統在諧振狀態下工作。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：
數字信號處理
超聲手術刀
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，設計一種用于管道流量測量的超聲波流量計。系統硬件由核心板，超聲波發射和接收電路，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成。采用時差法進行管道流量測量，時差測量采用SCOT 加權的廣義互相關時延估計算法。本論文設計的超聲波流量計具有測量速度快、準確性好、成本低等優點。關鍵字：C2000，超聲波，流量，廣義互相關算法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：
本文以“某港口航道水深適時監測技術研究”項目為背景,針對港口水深測量系統中發射的水聲信號,采用基于GPS時間同步技術、以MCU+FPGA為核心控制單元的設計方案,設計了一套適用于工程實際的水聲信號數據采集與處理系統。該系統作為港口航道水深適時監測技術的重要部分,具有極為重要的意義。水聲信號數據采集控制的核心是FPGA,時序電路的設計采用VHDL語言實現。主要任務是控制ADC與FIFO的工作時序相互配合,實現水聲信號的高速采集與存儲。該數據采集系統位于港口航道的一側,水聲信號的發射端位于港口航道另一側,在同步技術方面,系統使用GPS技術來實現。發射換能器和數據采集與處理系統的處理器同時讀取GPS的時間信息,到達預設時刻時,水聲信號發射端和數據采集系統同時啟動,實現對水聲信號的異地同步采集。水聲信號數據的算法處理是由單片機實現的。數據采集完成之后,單片機讀取FIFO中的數據,并對其作信號的短時能量分析,判斷出水聲信號的起始點,然后將水聲信號的有效數據和水聲信號起始點的位置通過VHF發送到上位機。實驗測試證明,本文設計的數據采集與處理系統在采樣率為4MHz時工作穩定可靠,功耗低,測量精度高,具有較強的實用性,在水聲信號的采集與處理方面有著廣闊的應用前景。
標簽：
數據采集
上傳時間：
2022-06-04
上傳用戶：
