Method and apparatus for controlling a winemaking process
A control method and an associated apparatus for a winemaking process, wherein a must obtained from the pressing step is sent to one of a plurality of fermentation tanks or a must is taken from a maceration and fermentation tank. The method comprises the steps of: —preselecting at least one colorimetric value of the said must; —colorimetrically measuring the must; —comparing the colorimetric value measured with said preselected value and—in the case of a deviation by a predefined amount between said two values: —sending said must obtained from the pressing step to a second tank different from the one said must was directed to; —stopping the maceration and fermentation of said must taken from the maceration and fermentation tank and transferring it into an aging tank or barrel.
1. A method for controlling a winemaking process for the production of wines, comprising the following steps:
taking a must when producing white or rose wine from a pressing step yet prior to sending the must to one of a plurality of fermentation and vinification tanks, or taking a must when producing red wine from a pumping-over liquid of a maceration and fermentation tank involving maceration and fermentation in the presence of solid which at least includes skins for at least 24 hours;
preselecting at least one colorimetric value of the said must;
colorimetrically measuring the must;
comparing the colorimetric value measured with said preselected value; and
if a deviation is detected by a predetermined amount between said measured value and said preselected value, either sending said must obtained from the pressing step in the case of white and rose winemaking to a second fermentation and vinification tank different from the one of the plurality of fermentation and vinification tanks to which said must was to be directed, or stopping the maceration and fermentation of said must in the case of red winemaking and transferring said must into an aging tank or barrel;
wherein the preselecting step of at least one colorimetric value of the said must is performed with reference to a matrix of colors corresponding to given organoleptic qualities of the obtainable wine.
2. The method according to claim 1 , characterized in that said stopping of the maceration and fermentation step takes place also when the colorimetric measurement signals a coloration caused by the oxidation of the must due to contact with the ambient air.
3. The method according to claim 2 , characterized in that the preselected colorimetric values involves multiple preselected values, in which case the measured colorimetric value of the must is successively compared with each of said preselected values.
4. The method according to claim 1 , characterized in that said colorimetric measurement is performed in real time on said must which is made to flow into a colorimetric measurement cell able to take pictures of the must and output a signal which provides colorimetric data of the must expressed in red, green, and blue (RGB) values.
5. The method according to claim 4 , characterized in that, when said predetermined deviation occurs, said must is directed to a second fermentation and vinification tank, after preselecting at least one second colorimetric reference value with respect to which a comparison with the measured colorimetric value of the must is performed, the supply to said second fermentation and vinification tank being continued until a predetermined deviation between said second at least one preselected value and said measured colorimetric value arises.
6. The method according to claim 5 , characterized in that, upon reaching said deviation of the measured value with respect to said at least one second preselected colorimetric value, the must is deviated towards a third fermentation and vinification tank or is discarded.
7. The method of claim 1 , wherein the matrix is predefined depending on type of grapes to be vinified and type of wine to be obtained.
8. The method of claim 7 , wherein the matrix is specified from a plurality of matrices each having selectable cells associated with a differing wine type.
9. An apparatus for controlling a winemaking process for the production of wines, comprising:
(i) a colorimetric measurement cell inserted into a flow pipe for a must either obtained from the pressing step in the case of white or rose wine production or taken from a pumping-over liquid of a maceration and fermentation tank in the case of red wine production; and,
(ii) a computer workstation connected to said colorimetric measurement cell and comprising means configured for comparison of the colorimetric value of the must detected by said cell with at least one predetermined colorimetric value, said computer workstation being provided with:
selection means, associated with said comparison means, for the selection of said at least one predetermined colorimetric value comprising a matrix formed by selectable cells each corresponding to a coloring defined by red, green, and blue (RGB) values or equivalent units, each cell being associated with activation means for selection of at least one colorimetric value to be compared with said detected colorimetric value of the must; and
(iii) means for controlling at least one valve, placed downstream of said colorimetric measurement cell, for directing the must flow towards a predetermined fermentation and vinification tank in the case of white or rose wine production or for determining transfer to an aging tank or barrel of the wine undergoing maceration and fermentation in the case of red wine production;
said matrix of the selectable cells being predefined depending on type of grapes to be vinified and type of wine to be obtained, the matrix being specified from a plurality of matrices each having selectable cells associated with a differing wine type.
10. The apparatus according to claim 9 , characterized in that said colorimetric measurement cell consists of a hollow opaque body having a through-flow duct for continuous flow of the must to be subjected to colorimetric examination, and a lateral housing for a camera, said camera being in optical communication with said through-flow duct and provided with autonomous means for lighting the recording field, said camera being also in communication with processing means for receiving the recorded images continuously or in a predetermined sequence, and extracting from said images information consisting of three red, green, and blue (RGB) basic colors to be provided to said comparison means.
11. The apparatus according to claim 9 , characterized in that the preselected colorimetric values are more than one, in which case the measured colorimetric value of the must is successively compared with each of said preselected values.