WO2016123873A1 - 一种将夏秋茶浓缩液氧化成速溶红茶的溶氧方法及装置 - Google Patents

一种将夏秋茶浓缩液氧化成速溶红茶的溶氧方法及装置 Download PDF

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WO2016123873A1
WO2016123873A1 PCT/CN2015/077741 CN2015077741W WO2016123873A1 WO 2016123873 A1 WO2016123873 A1 WO 2016123873A1 CN 2015077741 W CN2015077741 W CN 2015077741W WO 2016123873 A1 WO2016123873 A1 WO 2016123873A1
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summer
tea
autumn
liquid
autumn tea
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PCT/CN2015/077741
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English (en)
French (fr)
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陈全胜
张东亮
欧阳琴
岳鹏翔
赵杰文
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江苏大学
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Priority to US15/115,564 priority Critical patent/US20160366903A1/en
Publication of WO2016123873A1 publication Critical patent/WO2016123873A1/zh

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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
    • A23F3/00—Tea; Tea substitutes; Preparations thereof
    • A23F3/06—Treating tea before extraction; Preparations produced thereby
    • A23F3/08—Oxidation; Fermentation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N2021/8411—Application to online plant, process monitoring
    • G01N2021/8416—Application to online plant, process monitoring and process controlling, not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's
    • G01N2201/0627—Use of several LED's for spectral resolution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/063—Illuminating optical parts
    • G01N2201/0631—Homogeneising elements
    • G01N2201/0632—Homogeneising elements homogeneising by integrating sphere

Definitions

  • the invention relates to a tea preparation and processing technology and equipment, in particular to a dissolved oxygen method and a device for the oxidation of summer and autumn tea into instant black tea.
  • the gas-liquid mixing pipeline circuit comprises a section of a spiral pipe, and the summer tea concentrate is mixed with the air stream and flows at a high speed in the spiral pipe.
  • the summer and autumn tea concentrated color on-line detecting device comprises a flashing LED light source, a color detecting channel, a single-point silicon detector and a control terminal; the color detecting channel is located on the color detecting pipeline loop, the flash The frequency LED light source, the color detection channel and the single point silicon detector are optically connected, and the single point silicon detector is electrically connected to the control terminal.
  • the flashing LED light source is a hollow sphere, and the illuminants inside the hollow sphere have three groups, each of the illuminants is on the same ring, and each group of illuminants is red and green. And blue three light sources.
  • the light path of the color detecting channel and the single-point silicon detector passes through the center of the ring surrounded by the inner body of the hollow sphere.
  • each group of the illuminants is sequentially illuminated for 1 ms in the order of red, green, and blue colors, and is repeated every 1 minute.
  • the present invention also provides an intelligent dissolved oxygen device for oxidizing summer and autumn tea concentrated liquid into instant black tea, comprising a summer and autumn tea liquid storage tank, wherein the summer and autumn tea liquid storage tank is provided with a gas-liquid mixed pipeline circuit and color detection a pipeline circuit, wherein the gas-liquid mixing pipeline circuit is provided with a diaphragm liquid pump and a diaphragm air pump, and the diaphragm liquid pump extracts the summer and autumn tea concentrated liquid from the summer and autumn tea liquid storage tank and mixes with the compressed air of the diaphragm air pump to flow back at a high speed.
  • the gas-liquid mixing pipeline circuit is further provided with a spiral pipe, and the summer tea concentrated liquid is mixed with air and then pressed into the spiral pipe at a high speed.
  • the color detecting channel, the flash LED light source and the single-point silicon detector are connected by a through fiber.
  • the outer horizontal direction of the color detecting channel is provided with two interface flanges for connecting the through fiber, and the color detecting channel is internally provided with a quartz cuvette, and the quartz cuvette is up and down.
  • Each has a hose interface for connecting the rubber hose; two collimating lenses are embedded between the outer wall of the two sides of the color detecting passage and the outer wall of the quartz cuvette.
  • the beneficial effects of the invention are as follows: Firstly, the tea extract is introduced into the air through a special hovering pipe type dissolved oxygen device and uniformly mixed, so that the polyphenols in the summer tea concentrate can be fully oxidized, and the instant black tea can be ensured. The quality of the product is even and stable.
  • the color detection device based on multi-spectral flash LED light transmission technology is used to detect the color change of the summer autumn tea concentrate in real time, which can accurately determine the time point of moderate oxidation of the concentrated liquid and ensure the quality of the instant black tea obtained by oxidation. According to the invention, it is possible to oxidize the polyphenols in the tea leaves more uniformly and stably, and to more accurately and scientifically grasp the moderate oxidation point and improve the quality of the product.
  • FIG. 1 is a schematic view of an intelligent dissolved oxygen device for the oxidation of summer and autumn tea into instant black tea.
  • FIG. 2 is a schematic structural view of a flash LED light source.
  • Figure 3 is a schematic view showing the structure of the color detecting device (3).
  • Figure 4 is a graph showing the change of color of summer and autumn tea concentrate in the CIE L*a*b* chromaticity space during oxidation.
  • the invention has universality for chromaticity value monitoring and moderate oxidation control in the process of uniform oxygen oxidation and oxidation of summer and autumn tea concentrated liquid.
  • the summer and autumn green tea (fried green tea) concentrate is used as an experimental object, and oxidation of other types of green tea extract can be carried out with reference to this example.
  • the coiled pipe type dissolved oxygen method and device are used to promote the uniform oxidation of the summer tea concentrated liquid, and the color detecting device based on the multi-spectral flashing LED light transmission technology is used to monitor the color change of the summer and autumn tea concentrated liquid. When the color reaches the requirement, Represents moderate oxidation.
  • the specific technical solutions are as follows:
  • the spiral duct type dissolved oxygen apparatus mainly includes a diaphragm liquid pump 7, a diaphragm air pump 8, and a spiral duct 9.
  • the diaphragm liquid pump 7 extracts the summer and autumn tea concentrated liquid from the liquid storage tank 1 and enters into the spiral duct 9 together with the air compressed by the diaphragm air pump 8, and the spiral type duct 9 causes the fluid in the tube to form a spoiler, and the summer and autumn tea concentrated liquid
  • the oxygen in the compressed air is collided and thoroughly mixed in the spiral duct 9, so that the summer tea concentrate is sufficiently oxidized.
  • the color detecting device based on the multi-spectral flash LED light transmission technology mainly comprises a flash LED light source 5, a color detecting channel 3, a single-point silicon detector 4, a through fiber 10, a control terminal 6, a micro peristaltic pump 2, a flow meter 12 and Rubber hose 11.
  • the liquid storage tank 1 and the flow meter 12, the micro peristaltic pump 2, and the color detecting passage 3 are connected by a rubber hose 11 in the order of Fig. 1 to form a sampling circuit.
  • the straight-through optical fiber 10 of the standard interface is connected.
  • the single-point silicon detector 4 is connected to the control terminal 6 by wireless.
  • the flash LED light source 5 has a hollow sphere whose inner wall is coated with a barium sulfate diffuse reflection coating, which acts like an integrating sphere to diffuse the light of the light source lamp.
  • a small hole is opened on the horizontal axis of the sphere to connect the SMA905 standard interface as an output channel.
  • the three kinds of illumination sources L 1 , L 2 , and L 3 respectively emit light of three colors of red, green, and blue, and are sequentially illuminated for 1 ms in the order of L 1 , L 2 , and L 3 according to a set program, every 1 minute. repeat.
  • the micro-peristaltic pump 2 extracts the summer and autumn tea concentrate from the liquid storage tank 1 into the color detection channel 3, the flow meter 12 monitors the flow rate of the liquid in the pipeline, and the summer and autumn tea concentrate passes through the quartz in the color detection channel 3. The cuvette is returned to the reservoir 1.
  • the light emitted by the flash LED light source 5 is irradiated onto the cuvette through the through fiber 10 attached to the SMA905 interface flange of the color detecting channel 3, and the light transmitted through the summer tea concentrate is received by the single-point silicon detector 4,
  • the intensity values of the spot silicon detector 4 under red, green, and blue light respectively represent the R, G, and B values of the color of the summer tea concentrate, and the R, G, and B values are transmitted to the control terminal 6 by the 2.4 GHz wireless transmission protocol.
  • RGB color mode has device dependence and low perceptual linearity, it does not conform to human visual characteristics, it is only used for physical device display storage, and CIE L*a*b* is used to describe all visible to the human eye.
  • the illumination source of the flash LED light source 3 is sequentially illuminated in the order of L 1 , L 2 , and L 3 , and the integration time is increased as much as possible while ensuring that the single-point silicon detector 4 does not overflow, and each illumination source is set to maintain illumination. 1ms, then the next source of illumination is lit, and it lights up once every 1 minute.
  • the spiral tube 9 was placed in a constant temperature water at 25 ° C to ensure a constant temperature in the oxidation of the summer tea concentrate.
  • Figure 4 shows the distribution of the color change of the summer and autumn green tea concentrate in the CIE L*a*b* chromaticity space.
  • the dots within the range of degrees represent moderate oxidation and can stop oxidation.
  • the moderate range of oxidation in the figure is obtained by the following methods: firstly, 20 samples which are considered to be moderately oxidized by the review experts are respectively dissolved into the concentration in the oxidation process, and the L*a*b* value is detected by the above method; Then calculate the average of each of the 20 samples L*a*b* to obtain the coordinates of the mean points in the L*a*b* three-dimensional color space, and calculate the L*a*b* value of each sample in L.
  • *a*b* The Euclidean distance between the point and the mean point in the three-dimensional color space. The maximum distance is the radius, and the mean point is the center of the sphere. Drawing a sphere is the moderate range of oxidation.

Abstract

一种将夏秋茶浓缩液氧化成速溶红茶的溶氧方法及装置，所述装置包括夏秋茶贮液罐、设置在夏秋茶贮液罐上的气液混合管道回路和颜色检测管道回路等。所述方法是将夏秋茶浓缩液与空气流混合并沿气液混合管道回路回到夏秋茶贮液罐中，贮液罐中的夏秋茶浓缩液经颜色在线检测装置检测，当色度值落入预置的目标色度值范围内时，即可立即停止氧化。

Description

一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧方法及装置 技术领域
本发明涉及茶叶制备加工技术及设备，具体为夏秋茶氧化成速溶红茶过程的溶氧方法和装置。
背景技术
夏秋茶是指夏季和秋季产的茶，因其内部多酚类物质含量较高，所以味道苦涩，口感差，价格低廉，难以产生较高的经济效益。现代工艺将夏秋茶茶叶进行浸提，并将提取液进行浓缩，最好通入空气进行氧化，以生产出色泽亮丽、口感独特的速溶红茶。
传统的液态红茶氧化过程中，采用的是在氧化罐中通气或者不主动通气的方法，红茶是否氧化完成是靠有经验的工人通过感官评定判断的。由于这种氧化方式通氧均匀性差，无法保证茶叶中的多酚类物质氧化均匀，受工人水平、个人心情等因素影响较大，所以很难保证氧化产品品质的稳定性，致使速溶红茶存在产品品质不高、质量不稳定等问题，成为制约速溶红茶发展的瓶颈。
红茶氧化过程中，茶叶中的多酚类物质与氧气接触发生酶促氧化反应，产生一系列氧化、聚合、缩合等反应生成有色氧化产物茶黄素、茶红素和茶褐素；同时伴随着其它化合物的化学反应，形成了红茶特有的色、香、味品质。其中茶黄素影响着茶汤的明亮度和鲜爽度,茶红素则决定着茶汤的浓度和色泽。而茶汤的颜色变化直接反映了茶黄素和茶红素含量的变化，可作为评判红茶氧化程度的标准。
发明内容
本发明的目的在于提供一种夏秋茶氧化过程中对夏秋茶浓缩液的氧化颜色进行实时监测的方法和装置，实现氧化过程精确监控，提高速溶红茶的品质。
为实现上述发明目的，本发明采取的技术方案为：一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧方法，包括如下步骤：S1：将夏秋茶贮液罐上预先安装气-液混合管道回路和颜色检测管道回路；S2：所述气-液混合管道回路中的夏秋茶浓缩液不断与空气流混合并沿所述气-液混合管道回路高速流回到夏秋茶贮液罐中；所述颜色检测管道回路上安装有夏秋茶浓缩液颜色在线检测装置，所述颜色检测管道回路中的夏秋茶浓缩液经所述夏秋茶浓缩液颜色在线检测装置在线提取色度值后流回到夏秋茶贮液罐中；S3：读取夏秋茶浓缩液的色度值，当所述夏秋茶浓缩液的色度值落入目标色度值范围时，所述气-液 管道回路封闭，否则返回步骤S2。
上述方案中，所述气-液混合管道回路中包含一段盘旋式管道，所述夏秋茶浓缩液与空气流混合后在所述盘旋式管道中高速流动。
上述方案中，所述夏秋茶浓缩液颜色在线检测装置包括闪频LED光源、颜色检测通道、单点硅检测器和控制终端；所述颜色检测通道位于所述颜色检测管道回路上，所述闪频LED光源、所述颜色检测通道和所述单点硅检测器光连接，所述单点硅检测器与所述控制终端电连接。
上述方案中，所述闪频LED光源为空心球体，所述空心球体内部的发光体有三组，所述每组发光体均处在同一个圆环上，所述每组发光体由红、绿、蓝三种光源构成。所述颜色检测通道和所述单点硅检测器的光路穿过所述空心球体内部发光体围成的圆环的圆心。
上述方案中，所述每组发光体分别按照红、绿、蓝三种颜色的顺序依次亮1ms，每隔1分钟重复一次。
此外，本发明还提供了一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧装置，包括夏秋茶贮液罐，所述夏秋茶贮液罐中设置有气-液混合管道回路和颜色检测管道回路，所述气-液混合管道回路上安装有隔膜液泵和隔膜气泵，所述隔膜液泵从夏秋茶贮液罐中抽取夏秋茶浓缩液并与隔膜气泵压缩的空气混合后高速流回到夏秋茶贮液罐中；所述颜色检测管道回路上安装有微型蠕动泵、流量计和颜色检测通道，所述颜色检测通道的两端分别设有闪频LED光源和单点硅检测器，所述单点硅检测器与控制终端连接。
进一步的，所述气-液混合管道回路上还安装有盘旋管道，所述夏秋茶浓缩液与空气混合后高速压入到所述盘旋管道。
进一步的，所述颜色检测通道、所述闪频LED光源和所述单点硅检测器之间通过直通光纤连接。
进一步的，所述颜色检测通道的外部水平方向装有两个接口法兰，用来连接所述直通光纤，所述颜色检测通道内部装有一个石英比色皿，所述石英比色皿的上下各有一个用于连接橡胶软管的软管接口；所述颜色检测通道两侧外壁和石英比色皿两侧外壁之间嵌有两个准直透镜。
进一步的，所述闪频LED光源为空心球体，所述空心球体内部的发光体至少有两组，所述每组发光体均处在同一个圆环上，所述空心球体内部的每组发光体由红、绿、蓝三种光源构成，所述直通光纤的轴心线穿过所述空心球体内部发光体围成的圆环的圆心。
本发明的有益效果：其一，通过特制的盘旋管道式溶氧装置给茶叶提取液通入空气并进行均匀混合，可以使得夏秋茶浓缩液中的多酚类物质得到充分氧化，能保证速溶红茶产品的品质均匀稳定。其二，利用基于多频谱闪频LED光透射技术的颜色检测装置对夏秋茶浓缩液的颜色变化进行实时检测，能够精准确定浓缩液适度氧化的时间点，保证氧化得到的速溶红茶的品质。通过该发明，可以更均匀、更稳定地氧化茶叶中的多酚类物质，更准确、更科学地把握氧化适度点，提高产品的品质。
附图说明
图1为本发明夏秋茶氧化成速溶红茶过程的智能溶氧装置示意图。
图2为闪频LED光源结构示意图。
图3为颜色检测装置(3)的结构示意图。
图4为氧化过程中夏秋茶浓缩液颜色在CIE L*a*b*色度空间中的变化图。
图中：1夏秋茶贮液罐，2微型蠕动泵，3颜色检测通道，4单点硅检测器，5闪频LED光源，6控制终端，7隔膜液泵，8隔膜气泵，9盘旋管道，10直通光纤，11橡胶软管，12流量计，13软管接口，14石英比色皿，15准直透镜，16接口法兰。
具体实施方式
以下将结合附图和具体实施方式对本发明的技术方案做进一步详细说明。本发明对夏秋茶浓缩液均匀通氧氧化及氧化过程中色度值监测和适度氧化控制具有通用性。本实施实例以夏秋绿茶(炒青茶)浓缩液作为实验对象，其它类型绿茶提取物氧化可参考此实例进行。
本实施例采用盘旋管道式溶氧方法与装置促使夏秋茶浓缩液均匀氧化，采用基于多频谱闪频LED光透射技术的颜色检测装置监测夏秋茶浓缩液的颜色变化，当颜色达到要求时，即代表氧化适度。具体技术方案如下：
如图1中所示，盘旋管道式溶氧装置主要包括隔膜液泵7、隔膜气泵8和盘旋管道9。其中，隔膜液泵7从贮液罐1中抽取夏秋茶浓缩液并与隔膜气泵8压缩的空气一同打入盘旋式管道9中，盘旋式管道9使得管内的流体形成扰流，夏秋茶浓缩液和压缩空气中的氧气得以在盘旋式管道9中碰撞并充分混合，使得夏秋茶浓缩液充分氧化。基于多频谱闪频LED光透射技术的颜色检测装置主要包括闪频LED光源5、颜色检测通道3、单点硅检测器4、直通光纤10、控制终端6、微型蠕动泵2、流量计12和橡胶软管11。贮液罐1与流量计12、微型蠕动泵2、颜色检测通道3按照图1的顺序通过橡胶软管11相连，形成取样回路。闪频LED光源5、颜色检测通道3、单点硅检测器4通过带有SMA905 标准接口的直通光纤10相连。单点硅检测器4与控制终端6通过无线相连。
如图2所示，闪频LED光源5内部有一个内壁涂有硫酸钡漫反射涂层的空心球体，其作用类似于积分球，可将光源灯的光漫射。球体内部分别有三种不同颜色的发光源L1、L2、L3，球体水平轴线上开一小洞外接SMA905标准接口作为输出通道。三种发光源L1、L2、L3分别发出红、绿、蓝三种颜色的光，并按照设定的程序按照L1、L2、L3的顺序依次亮1ms，每隔1分钟重复一次。
如图3所示，颜色检测通道3的外部水平方向装有两个接口法兰16，用来连接直通光纤10，颜色检测通道3内部装有一个石英比色皿14，石英比色皿14的上下各有一个用于连接橡胶软管的软管接口13；颜色检测通道3两侧外壁和石英比色皿两侧外壁之间嵌有两个准直透镜15。
溶氧开始时：微型蠕动泵2从贮液罐1中抽取夏秋茶浓缩液注入颜色检测通道3中，流量计12监测管道中的液体的流速，夏秋茶浓缩液通过颜色检测通道3中的石英比色皿回流到贮液罐1中。闪频LED光源5发出的光通过接在颜色检测通道3的SMA905接口法兰上的直通光纤10照射在比色皿上，透过夏秋茶浓缩液的光被单点硅检测器4接收到，单点硅检测器4在红、绿、蓝光下的强度值分别代表夏秋茶浓缩液颜色的R、G、B值，通过2.4GHZ无线传输协议将R、G、B值发送给控制终端6。由于RGB色彩模式具有设备依赖性，且在感知上的线性度低，不符合人类视觉特性，仅用于物理设备显示存储使用，而CIE L*a*b*是用来描述人眼可见的所有颜色的最完备的色彩模型，在L*a*b*模型中的均匀改变对应于在感知颜色中的均匀改变，所以要将RGB值转化为CIE L*a*b*值。RGB到CIE L*a*b*的转换需先转为XYZ三刺激值，再转换为CIE L*a*b*值，最后判断是否进入氧化适度的范围。计算公式如下：
RGB→XYZ：
X＝var_R*0.4124+var_G*0.3576+var_B*0.1805
Y＝var_R*0.2126+var_G*0.7152+var_B*0.0722
Z＝var_R*0.0193+var_G*0.1192+var_B*0.9505
其中，
Figure PCTCN2015077741-appb-000001
Figure PCTCN2015077741-appb-000002
Figure PCTCN2015077741-appb-000003
XYZ→CIE-L*a*b*:
CIE-L*＝(116*var_Y)-16
CIE-a*＝500*(var_X-var_Y)
CIE-b*＝200*(var_Y-var_Z)
其中，
Figure PCTCN2015077741-appb-000004
Figure PCTCN2015077741-appb-000005
Figure PCTCN2015077741-appb-000006
设置闪频LED光源3的发光源按照L1、L2、L3的顺序依次点亮，在保证单点硅检测器4不溢出的情况下尽可能增加积分时间，设置每个发光源维持发光1ms，随后下一个发光源点亮，每隔1分钟轮流点亮一次。将盘旋管道9置于25℃的恒温水中，以保证夏秋茶浓缩液氧化中温度恒定。
图4为夏秋绿茶浓缩液的颜色变化在CIE L*a*b*色度空间中的分布，图中在氧化适 度范围内的点代表已经氧化适度，可以停止氧化。其中，图中的氧化适度范围是通过以下方式获得的：首先选择评审专家认为氧化适度的20个样品，分别溶解成氧化过程中的浓度，用上述方法检测得到其L*a*b*值；然后计算20个样本L*a*b*中每个分量的平均值，得到L*a*b*三维色彩空间中的均值点的坐标，计算每个样品的L*a*b*值在L*a*b*三维色彩空间中的点与均值点之间的欧式距离，取最大距离为半径，均值点为球心，绘制一个球体即为氧化适度范围。

Claims (10)

  1. 一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧方法，包括如下步骤：
    S1：将夏秋茶贮液罐(1)上预先安装气-液混合管道回路和颜色检测管道回路；
    S2：所述气-液混合管道回路中的夏秋茶浓缩液不断与空气流混合并沿所述气-液混合管道回路高速流回到夏秋茶贮液罐(1)中；所述颜色检测管道回路上安装有夏秋茶浓缩液颜色在线检测装置，所述颜色检测管道回路中的夏秋茶浓缩液经所述夏秋茶浓缩液颜色在线检测装置在线提取色度值后流回到夏秋茶贮液罐(1)中；
    S3：读取夏秋茶浓缩液的色度值，当所述夏秋茶浓缩液的色度值落入目标色度值范围时，所述气-液管道回路封闭，否则返回步骤S2。
  2. 根据权利要求1所述的一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧方法，其特征在于，所述气-液混合管道回路中包含一段盘旋式管道，所述夏秋茶浓缩液与空气流混合后在所述盘旋式管道中高速流动。
  3. 根据权利要求1或2所述的一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧方法，其特征在于，所述夏秋茶浓缩液颜色在线检测装置包括闪频LED光源(5)、颜色检测通道(3)、单点硅检测器(4)和控制终端(6)；所述颜色检测通道(3)位于所述颜色检测管道回路上，所述闪频LED光源(5)、所述颜色检测通道(3)和所述单点硅检测器(4)光连接，所述单点硅检测器(4)与所述控制终端(6)电连接。
  4. 根据权利要求3所述的一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧方法，其特征在于，所述闪频LED光源(5)为空心球体，所述空心球体内部的发光体有三组，所述每组发光体均处在同一个圆环上，所述每组发光体由红、绿、蓝三种光源构成；所述颜色检测通道(3)和所述单点硅检测器(4)的光路穿过所述空心球体内部发光体围成的圆环的圆心。
  5. 根据权利要求4所述的一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧方法，其特征在于，所述每组发光体每隔1分钟按照红、绿、蓝三种颜色顺序依次亮一次。
  6. 一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧装置，包括夏秋茶贮液罐(1)，其特征在于，所述夏秋茶贮液罐(1)中设置有气-液混合管道回路和颜色检测管道回路，所述气-液混合管道回路上安装有隔膜液泵(7)和隔膜气泵(8)，所述隔膜液泵(7)从夏秋茶贮液罐(1)中抽取夏秋茶浓缩液并与隔膜气泵(8)压缩的空气混合后高速流回到夏秋茶贮液罐(1)中；所述颜色检测管道回路上安装有微型蠕动泵(2)、流量计(12)和颜色检测通道(3)，所述 颜色检测通道(3)的两端分别设有闪频LED光源(5)和单点硅检测器(4)，所述单点硅检测器(4)与控制终端(6)连接。
  7. 根据权利要求6所述的一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧装置，其特征在于，所述气-液混合管道回路上还安装有盘旋管道(9)，所述夏秋茶浓缩液与空气混合后高速压入到所述盘旋管道(9)。
  8. 根据权利要求6或7所述的一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧装置，其特征在于，所述颜色检测通道(3)、所述闪频LED光源(5)和所述单点硅检测器(4)之间通过直通光纤(10)连接。
  9. 根据权利要求8所述的一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧装置，其特征在于，所述颜色检测通道(3)的外部水平方向装有两个接口法兰(16)，用来连接所述直通光纤(10)，所述颜色检测通道(3)内部装有一个石英比色皿(14)，所述石英比色皿(14)的上下各有一个用于连接橡胶软管的软管接口(13)；所述颜色检测通道(3)两侧外壁和石英比色皿两侧外壁之间嵌有两个准直透镜(15),所述单点硅检测器(4)与所述控制终端(6)之间通过无线相连。
  10. 根据权利要求8所述的一种将夏秋茶浓缩液氧化成速溶红茶的智能溶氧装置，其特征在于，所述闪频LED光源(5)为空心球体，所述空心球体内部的发光体至少有两组，所述每组发光体均处在同一个圆环上，所述空心球体内部的每组发光体由红、绿、蓝三种光源构成，所述直通光纤(10)的轴心线穿过所述空心球体内部发光体围成的圆环的圆心。
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