JPH03187897A - Saccharide rate quality controller - Google Patents

Abstract

PURPOSE:To hold saccharide rate at a predetermined value by inputting head obtained by inputting saccharide rate and temperature of stock in a metering cup and the rate to obtain a correction value of predetermined amount of stock, and outputting a difference between the predetermined amount of the corrected stock and the head to a metering controller as a set discharge amount. CONSTITUTION:Saccharide rate of stock of a metering cup 3 is detected by a saccharide rate detector 10, and the temperature of the stock is detected by a temperature detector 11. These outputs are input to a head calculator 12, which determines stock dynamic viscosity and specific weight by a built-in table from the rate and temperature of the stock to obtain the head. The output of the detector 10 is input to a stock predetermined amount corrector 13, which calculates the correction value of the stock predetermined amount. An adder 14 adds the predetermined amount input from a metering controller 6 and the output of the corrector 13 to calculate a correction stock predetermined amount. A subtracter 15 inputs the output of the adder 14 and the output of the calculator 12, and outputs (correction stock predetermined amount-head), i.e., set discharge amount of a drain valve 7.

Description

[Detailed description of the invention]

(Field of Industrial Application) The present invention relates to a sugar content quality control device commonly used in filling machines of food machinery. (Prior art) The filling method of a filling machine that fills a container with a predetermined amount of beverage includes:
There are two normal methods. (1) The carbonated water and high sugar content stock solution that make up the beverage are mixed at a predetermined ratio, the liquid adjusted to the predetermined sugar content is stored in a tank in advance, and the filling machine fills the specified amount of the mixed solution into the container. . (2) Carbonated water and stock solution are stored in separate tanks; in the first filling process, a specified amount of carbonated water is filled into the container, and in the next filling process, a specified amount of stock solution is filled into the container, which is then stirred in the subsequent process. The container is then filled with a beverage having a predetermined sugar content. In this case, the filling order of carbonated water and stock solution may be reversed. FIG. 2 shows a schematic configuration of a conventional apparatus in which a container filled with a specified amount of carbonated water is transported in the first filling step, and then filled with stock solution in the next filling step. In FIG. 2, a stock solution tank 1 stores a stock solution with a high sugar content. The stock solution is supplied to the measuring cup 3 by the input valve 2. The measuring cup 3 is supported by a support stand 4, the displacement star of the support stand 4 is detected by the load cell 5, the displacement detection signal is input to the weighing controller 6, and the total weight including the tare of the measuring force knob 3 is calculated. be measured. Reference numeral 7 denotes a discharge valve, which is used to fill the container 8 with the stock solution from the measuring cup 3. Opening and closing of the input valve 2 and the discharge valve 7 are controlled by the metering controller 6. The dot-dash line in FIG. 2 is equipped with the same number of containers as the number of containers to be filled at the same time, and one metering controller 6 is constructed by multiplexing the opening/closing signal lines of the input valve 2, the discharge valve 7, and the detection signal line of the load cell 5. Alternatively, several units can control the filling of all containers. FIG. 3 shows a control sequence diagram of the metering controller 6 for each filling of one container. Now, as shown in FIG. 3, the metering control 236 outputs an opening command to the input valve 2, and replenishes the old volume comp 3 with the stock solution that was reduced in the previous filling. When the measuring cup 3 is replenished with a predetermined amount of stock solution, the metering controller 6 outputs a close command to the input knob 2. -Also, the metering controller 6 acquires the input metering value after the time has elapsed until the amount d has settled down, and then outputs an opening command to the discharge valve 7. A predetermined amount of stock solution passes through the injection pipe 9 When the container 8 is filled, the metering controller 6 outputs a close command to the discharge valve 7. The metering controller 6 acquires the U [output star value] after a period of time has elapsed until the metering value has stabilized. The above control sequence is repeated every time a container is filled, and the synchronization signal is input from the container conveyance sequence control system. One metering controller 6 controls the filling of a large number of containers. The input amount set value and the discharge amount set value of the metering controller 6 are inputted from the outside. (Problems to be Solved by the Invention) In order to maintain the sugar content of a product beverage at a specified value, it is necessary to add a specified amount of stock solution to a specified amount of carbonated water in a container. A prescribed amount of the stock solution is metered and dispensed by the metering controller 6, but the following problem occurs at this time. (1) The metering controller 6 issues a close command to the discharge valve 7 when the amount of raw liquid discharged by the discharge valve 7 reaches the discharge amount setting value, but due to the operation delay time of the discharge valve 7, the discharge measurement value does not change. The emission amount will be greater than the set value. This difference is the head amount,
(−discharge measured value−discharge set value), but this head difference causes the sugar content of the product beverage to be higher than the specified value. (2) This amount of head difference is calculated using the following formula. Head amount (g) = Stock solution weight velocity in injection tube (g/5ec)
×Activation delay time (sec) ---
--- (1) In general, the activation delay time of the discharge valve 7 is constant, but if the level of the stock solution in the measuring cup 3 is approximately constant, the flow rate of the stock solution in the injection pipe changes depending on the viscosity of the stock solution, so the ## of the stock solution is I? ! Varies depending on degree and temperature. Therefore, since the amount of head changes depending on the type and temperature of the stock solution, this also causes fluctuations in the sugar content of the product beverage. From the above, in order to fill a container with a specified amount of stock solution, the following two items are necessary. (1) Accurately predict the amount of head. (2) Determine the discharge amount setting value of the metering controller 6 using the following formula. Discharge amount set value - Specified amount of stock solution - Head amount - (2) Here, the specified amount of stock solution is the amount of stock solution that is required to reach the specified sugar content with respect to the specified amount of carbonic acid y'g in the container. The present invention has been devised in order to solve the above-mentioned conventional problems. An injection valve for filling the stock solution with measuring force/knob G)111, a support stand for holding the measuring cup, a funnel' cell for detecting the displacement of the support stand, and a container filled with the stock liquid from the measuring cup. In the filling machine, the filling machine includes a discharge valve that controls the amount of water in the measuring cup, and a weighing controller that receives a measurement signal of the total weight including the tare of the measuring cup from the load cell and controls the opening and closing of the input valve and the discharge valve. A sugar content detector that detects the sugar content of the stock solution, a temperature detector that detects the temperature of the stock solution in the same measuring cup, and a head amount calculator that manually outputs the amount of head difference by manually inputting the outputs of the sugar content detector and temperature detector. Then, input the output of the same sugar content detector and output the corrected value of the specified amount of stock solution with a corrector, and add the specified amount of stock solution from the metering controller and the output from the specified amount of stock solution corrector. an adder that calculates the corrected specified amount of stock solution, and an adder that calculates the output of the adder and the head difference (1) manually, and calculates the difference between the two (corrected specified amount of stock solution - head amount) as the discharge amount setting value. It consists of a subtracter that outputs to the metering controller.
This is a means to solve problems. (Function) In general, the kinematic viscosity characteristics of a sweetened beverage stock solution can be approximated by the kinematic viscosity of a sucrose aqueous solution. FIG. 4 shows the kinematic viscosity characteristics of a sucrose aqueous solution. Note that as the temperature of the stock solution increases, the kinematic viscosity decreases, and as the upper limit of the sugar content increases, the viscosity increases. In addition, the specified conditions for filling the stock solution are determined as follows. Stock solution temperature T: 10'C Stock solution sugar content B: 57° Injection pipe inner diameter d: 11m1II Filling weight speed W: 60g/sec For the sake of explanation, we have not included any damage in the pipe, including bends in the piping and pressure loss at the discharge valve. Let the length be representative of the length of the injection tube, and first find the equal flaw length R8 from the above conditions. The kinematic viscosity ν of the stock solution is ν = 54 x 10-2 cffl/sec The specific weight T of the stock solution is r = 1.273 g/ad The flow rate U in the pipe is u = W/ (-d2r) = 49.60 cm/
The flow in the injection pipe is considered to be laminar due to the size of R8, and the pressure loss ΔP is given by the following equation. Here, f-friction coefficient g-gravitational acceleration [is a laminar flow, so it is given by the following equation. (3) From equation (4), the following equation holds true. Also, the discharge valve operation delay time Δ

If [ is 0.2 seconds, then from formula (+), the head difference ΔW is ΔW=WXΔt=60X0.2=12g ---
--- (5) Next, find the change in head when the temperature of the stock solution rises to 15°C. At this time, the kinematic viscosity of the stock solution ν is: C = 39.5 x 10-2 cffl/sec, and the specific weight T is r = 1.271 g/cIl! It is. In addition, the injection tube flow velocity U at this time is determined from equations (3) and (4) as follows. From the above equation, the head amount ΔW is 108.7 cm for R8. (5) From the equation (8), it can be seen that the head amount increases by 4.4 g when the stock solution temperature increases by 5°C. Next, find the change in head when the sugar content of the stock solution decreases by 2°. At this time, the kinematic viscosity ν of the stock solution is ν = 40 x 10- ”c/sec, and the specific weight γ is r = 1.2623 g/c-. The flow velocity U at this time is obtained from (6) 2. Head The amount ΔW is obtained from the formula (7). 67.52X0.2=16.20g −−1・−(9)(5) As can be seen from the formula (9), the sugar content of the stock solution is 2°
The head amount increases by 4.2g due to the decrease in . Further, when the sugar content of the stock solution changes, the prescribed amount S of the stock solution also changes. Normal sugar content of stock solution B. The specified amount of stock solution is S. Then, when the sugar content of the stock solution changes by ΔB, the amount of change ΔS in the specified amount of stock solution is given by the following equation. Therefore, at this time, it is necessary to increase or decrease the specified amount of stock solution filled in advance by ΔB. That is, when the sugar content decreases, the specified amount of stock solution increases by ΔB, so it is necessary to reduce the stock solution by ΔB and fill it. In the above study, the activation delay time of the discharge valve 7 was assumed to be 0.2 seconds, but it is difficult to predict accurately due to the delay due to the valve activation time and the delay in the valve operating section. , (1) can be used to estimate the actuation delay time Δt. That is, the amount of head difference ΔW is calculated as the difference between the actual measured value of the discharge amount and the set value of the discharge amount. On the other hand, given the temperature and sugar content of the stock solution, the kinematic viscosity of the stock solution ν
Since the specific weight γ is determined, the flow velocity U in the injection pipe can be estimated from equation (6). Further, from equation (1), the discharge valve operation delay time Δ[ can be calculated from the following equation. ΔW Δt = −−−−
−−−−(If)γ−d”u This operation delay time Δt hardly changes depending on the temperature and sugar content of the stock solution, so from the above, if the temperature and sugar content of the stock solution are given, the head difference can be calculated using the following procedure. It is possible to control the quality of the sugar content of the product beverage by accurately predicting the discharge amount and determining the discharge amount setting value. (]) Input the temperature and sugar content of the stock solution. (2) From equation (6), calculate the flow rate of the stock solution in the injection pipe. Calculate U. (3) Calculate the head amount from formula (7). (4) If the sugar content of the stock solution changes, set the specified amount of stock solution S to 00.
Correct by the formula. (5) Determine the emission amount setting value from equation (2). (Example) The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 5 shows the relationship between the sugar content quality control device 20 in the embodiment of the present invention and the conventional device shown in FIG. 2, and FIG. The detailed configuration of the sugar content crystalline control device is shown. The sugar content quality control device 20 detects and inputs the sugar content and temperature of the measuring cup 3, inputs the prescribed amount of stock solution from the metering control device 6, and outputs a discharge amount set value to the metering control device 6. In FIG. 1, the sugar content of the stock solution in the measuring cup 3 is detected by a sugar content detector 10, and the temperature of the stock solution is detected by a temperature detector 11. [Output of sugar content detector 10 and temperature sensor] The output of 1 is input to the head calculator 12, which determines the kinematic viscosity and specific weight of the stock solution from the sugar content and temperature of the stock solution using a built-in table.
Find the amount of head from equations (6) and (7). Also, sugar content detector 1
The output of 0 is input to the stock solution specified amount corrector 13, and a correction value for the stock solution specified amount is calculated from the formula 00. The adder 14 adds the specified amount of undiluted solution manually input from the metering controller 6 and the output of the specified undiluted solution amount corrector 13 to calculate a corrected specified amount of undiluted solution. The subtracter 15 inputs the output of the adder I4 and the output of the head amount calculator I2, and outputs (corrected stock solution specified amount - head amount), that is, the discharge amount setting value of the discharge valve 7. Further, the head amount calculator 12 calculates the head amount when the sugar content and temperature of the stock solution change. The corrector 13 calculates a correction amount for the prescribed amount of the stock solution when the sugar content of the stock solution changes. Furthermore adder 1
4 calculates the specified amount of stock solution that the discharge valve 7 should be filled with. The subtractor 15 calculates the discharge amount setting value of the discharge valve necessary to maintain the sugar content of the product beverage at a specified value even if the sugar content and temperature of the stock solution change. (Effects of the Invention) Since the present invention is configured as explained in detail above,
Even if the sugar content and temperature of the stock solution change, by accurately predicting the head and giving the discharge valve setting value accurately, it is possible to always fill the container with the correct discharge volume specification value, which allows the product beverage to be Sugar content can be maintained at the specified value.

[Brief explanation of drawings]

Figure 1 is a flow sheet for a sugar content quality control device showing an embodiment of the present invention, Figure 2 is a flow sheet for a conventional filling machine, and Figure 3 is a flow sheet for a conventional filling machine.
The figure is a filling sequence diagram of a filling machine, FIG. 4 is a kinematic viscosity characteristic diagram of a sucrose aqueous solution, and FIG. 5 is a flow sheet showing the relationship between the sugar content quality control device of the present invention and a conventional filling machine. Explanation of the main parts of the diagram 1 - Stock solution tank 2 - Input valve 3 - Measuring cup 5 - Load cell 7 - Discharge valve 10 - Sugar content detector 12 - Head difference detector 14 - Adder support stand Metering controller Container temperature sensor Stock solution specified amount corrector Subtractor Mitsubishi Heavy Industries, Ltd. Figure 2 JPJj Figure 1, original, i night, tank Figure 3 Figure 5

Claims (1)

[Claims] A stock solution tank for storing the stock solution, a charging valve for replenishing the stock solution from the stock solution tank into a measuring cup, a support stand for holding the measurement cup, a load cell for detecting the displacement of the support stand, and a load cell for detecting the displacement of the support stand; A filling machine comprising a discharge valve for filling a container with a stock solution, and a metering controller that receives a measurement signal of the total weight of the measuring cup including a tare from the load cell and controls the opening and closing of the input valve and the discharge valve, A sugar content detector that detects the sugar content of the stock solution in the measuring cup, a temperature detector that detects the temperature of the stock solution in the measuring cup, and the output of the sugar content detector and temperature sensor are inputted to output the amount of head difference. a head amount calculator that inputs the output of the sugar content detector and outputs a correction value for the specified amount of stock solution; An adder that calculates the corrected specified amount of stock solution by adding the outputs of , and an adder that inputs the output of the adder and the output of the head amount calculator and sets the discharge amount by the difference between the two (corrected specified amount of stock solution - head amount) A sugar content quality control device comprising: a subtractor that outputs a value to the metering controller.