本文選題：硫磺熏制 + 中藥材��； 參考：《河北大學》2017年碩士論文

【摘要】：對中藥材硫磺殘留量超標的現(xiàn)象常有報道,常規(guī)中藥材二氧化硫檢測方法步驟較繁瑣,需要專業(yè)人員在專業(yè)場所進行測量,而適合現(xiàn)場檢測的便攜式儀器卻鮮有報道。本文采用LED光源研制了一種硫熏中藥材快速檢測儀。首先對本課題組前期研究工作進行了總結。介紹了硫熏與正品菊花、硫熏貢菊的無水乙醇浸出液的吸收峰,得到被硫磺熏制樣品浸出液的吸收峰與硫磺的無水乙醇浸出液的吸收峰相同,均為715 nm和835 nm。針對前期研制的檢測儀存在鋰電池組電能利用率低、光源功耗大、光源利用率低的問題,本論文對檢測儀的電路進行了優(yōu)化設計,主要涉及鋰電池組、光源、LED恒流驅動電路、鋰電池電壓監(jiān)測電路。首先,通過加入XL6009 DC/DC升壓模塊(15 V),為LED恒流驅動電路提供恒定電壓,解決了鋰電池組工作時電壓變化范圍大、必須留出冗余電壓的問題。升壓模塊的使用使得鋰電池由6節(jié)減少到2節(jié),電池組電壓由16.5 V~25.2 V降至5.5 V~8.4 V,在鋰電池組電壓變化時始終能夠提供穩(wěn)定的15 V電壓,提高了電池組電能的利用率。其次,為了避免鋰電池過放電受損,設計了過放電保護電路,在電池組電壓低至約5.6 V時自動切斷電源。再次,光源部分采用發(fā)光波長為700 nm和830 nm組合式LED光源,代替12 V/20 W的鹵鎢燈(350 nm~1000 nm),降低了光源的功耗,測試了LED恒流驅動電路的基本性能,其負載和輸入電壓變化調整率均優(yōu)于0.2%。另外,通過增加光纖透鏡、采用蜂窩式結構光源,提高了LED光源的利用率。本文測試了從本地藥店購買的硫熏枸杞和黨參樣品的無水乙醇浸出液的吸收峰,檢測結果顯示均被硫磺熏制,與已知樣品被硫磺熏制相吻合。測試結果表明,該檢測儀有望用于鑒別中藥材是否被硫磺熏制。
[Abstract]:It is often reported that the residue of sulfur in Chinese medicinal materials exceeds the standard. The routine method of sulfur dioxide detection of traditional Chinese medicinal materials is more complicated and requires professional personnel to measure it in professional places, but the portable instruments suitable for field detection are rarely reported. In this paper, a fast detector for sulfur fumigation of Chinese medicinal materials has been developed by using LED light source. First of all, the previous research work of our group is summarized. The absorption peaks of anhydrous ethanol leachate of chrysanthemum and chrysanthemum were introduced. The absorption peak of sulfur fumigation sample leaching solution was the same as that of sulfur anhydrous ethanol leaching solution, both being 715 nm and 835 nm. In view of the problems of low energy utilization ratio of lithium battery pack, large power consumption of light source and low utilization rate of light source, this paper optimizes the circuit design of the detector, which mainly involves lithium battery pack, LED constant current driving circuit of light source, etc. Lithium battery voltage monitoring circuit. First of all, by adding XL6009 DC / DC boost module 15V / L to provide constant voltage for LED constant current drive circuit, the voltage variation range of lithium battery pack is large and the redundant voltage must be set aside. The use of the booster module reduces the lithium battery from 6 to 2, and the battery pack voltage from 16.5 V to 5.5 V / V 8.4 V, which can always provide a stable 15 V voltage when the battery voltage changes, thus increasing the utilization rate of battery power. Secondly, in order to avoid overdischarge damage of lithium battery, an overdischarge protection circuit is designed to automatically cut off the power supply when the voltage of the battery is as low as 5.6 V. Thirdly, the light source part uses the combined LED light source with the wavelength of 700nm and 830nm instead of the 12V / 20W halogen tungsten lamp, which reduces the power consumption of the light source, and tests the basic performance of the LED constant current drive circuit. The adjustment rate of load and input voltage is better than 0.2. In addition, by adding optical fiber lens and adopting honeycomb structure light source, the utilization ratio of LED light source is improved. In this paper, the absorption peaks of anhydrous ethanol leachate of Chinese wolfberry and Codonopsis pilosula samples purchased from local pharmacies were measured. The results showed that all samples were smoked with sulfur, which coincided with that of known samples. The test results show that this instrument is expected to be used to identify whether Chinese herbal medicines are smoked with sulfur.
【學位授予單位】：河北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP216

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本文編號：1995815