基于声振法水果硬度检测仪数据采集系统的设计
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摘要
我国水果产量丰富,果品的贮藏、运输、加工等都与水果硬度密切相关,现有的果实硬度测量计大多需要破坏果实,且测量位置与测量方法对测量结果有较大影响。针对水果硬度检测需求,设计基于敲击振动法的水果硬度检测仪的数据采集系统,以方便研究果实声振特性与硬度之间的关系,也为基于声振法的水果硬度计的设计提供技术基础。系统利用DSP为数据处理核心,结合TI的CODEC专用芯片,进行音频数据的采集,并利用自适应滤波算法对音频数据进行处理,运算结果发送至主机,由主机完成水果的后续分级等操作。
Fruit production is rich in China,fruit storage,transportation,processing and so on are closely related to fruit hardness.Most of the existing fruit hardness measurement instruments need to destroy fruit,and the location and measurement methods have great influence on the measurement results.Aiming at the requirement of fruit hardness testing,a data acquisition system based on percussive vibration method is designed for fruit hardness tester,which is convenient for studying the relationship between fruit's acoustic characteristics and hardness,and also provides a technical basis for the design of fruit hardness tester based on acoustic method.The system uses DSP as the core of data processing,and combines TI's CODEC special chip to collect audio data,and uses adaptive filtering algorithm to process audio data.The result is sent to the host,and the host is finished the subsequent grading of fruits.
Fruit production is rich in China,fruit storage,transportation,processing and so on are closely related to fruit hardness.Most of the existing fruit hardness measurement instruments need to destroy fruit,and the location and measurement methods have great influence on the measurement results.Aiming at the requirement of fruit hardness testing,a data acquisition system based on percussive vibration method is designed for fruit hardness tester,which is convenient for studying the relationship between fruit's acoustic characteristics and hardness,and also provides a technical basis for the design of fruit hardness tester based on acoustic method.The system uses DSP as the core of data processing,and combines TI's CODEC special chip to collect audio data,and uses adaptive filtering algorithm to process audio data.The result is sent to the host,and the host is finished the subsequent grading of fruits.
引文
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[3]严丽,李新平.苹果采后生理变化及保鲜方法研究进展[J].食品研究与开发,2007,28(2):137~139.Yan Li,Li Xinping.Recent development of post-harvest physiology and the fresh-keeping technique of apples[J].Food Research and Development,2007,28(2):137~139.
[4]侯玉婷,刘青,施威,等.水蜜桃采后生理及保鲜技术研究进展[J].北方园艺,2015,(17):183~187.
[5]赵心语,崔志宽,李阳,等.不同结合方法对凤凰水蜜桃采后保鲜品质的研究[J].天津农业科学,2014,20(5):51~56.Zhao Xinyu,Cui Zhikuan,Li Yang,et al.Effects of the new different combinating methods on the peach postharvest during storage[J].Tianjin Agricultural Sciences,2014,20(5):51~56.
[6]徐炎.水果保鲜技术与保鲜机理分析[J].科技风,2016,(23):15.
[7]王子华,付志一,邓西民.果实硬度和脆性的测量方法探索[C].北京力学会第十六届学术年会论文集,2010.
[8]滕斌.梨桃撞击频谱特性的研究[D].杭州:浙江大学,2002.Teng Bin.Studies on the characteristics of frequency of pear and peach[D].Hangzhou:Zhejiang University,2002.
[9]孙慧杰.库尔勒香梨跌落碰撞接触应力分析及损伤预测的研究[D].石河子:石河子大学,2014.Sun Huijie.Contact pressure analysis of drop impact for Korla pear and bruising predication using finite element analysis[D].Shihezi:Shihezi University,2014.
[10]王俊,杜尧舜,王剑平,等.梨的各向机械特性差异[J].农业机械学报,2000,31(6):58~60,64.Wang Jun,Du Yaoshun,Wang Jianing,et al.Anisotropic mechanical properties of pears[J].Transactions of the Chinese Society of Agricultural Machinery,2000,31(6):58~60,64.
[11]Abbott J A.Sonic technique for measuring texture of fruits and vegetables[J].Food Technol,1968,22(5):635~646.
[12]Chen P,Sun Z.A review of non-destructive method for quality evaluation and sorting of agricultural products[J].Journal of Agricultural Engineering Research,1991,49(91):85~98.
[13]Nicola6Bart M,Defraeye T,De K B,et al.Nondestructive measurement of fruit and vegetable quality[J].Annual Review of Food Science and Technology,2014,5(1):285~312.
[14]Kibok K,Sangdae L,Mansoo K,et al.Determination of apple firmness by nondestructive ultrasonic measurement[J].Postharvest Biology and Technology,2008,52(1):44~48.
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