Method of determining product integrity, placed in capacity

FIELD: physics.

SUBSTANCE: given sign of product is determined by means of the first method of measuring at which the first physical properties of the product are explored, in addition the given sign is determined with, at least, the second method of measuring which is grounded on the second physical properties which differs from the first physical properties, odds of values of the mentioned given sign gained by means of both methods of measuring are determined, and the mentioned odds of values are compared to the given threshold and in case the specified odds of values exceeds the specified threshold, solution on infringement of integrity of the mentioned yield is made.

EFFECT: increase of reliability of product integrity determination.

4 cl, 3 dwg

 

The technical field relates to inventions

The invention relates to a method of establishing the integrity of the product in the tank, and is determined by the specified characteristic in the vessel using the first measurement method, which is based on a first physical property of the product.

Compared to foods in containers, such as liquids in bottles or powder product in the Bank, the interest many signs. Regarding liquids in bottles-known methods of measuring the height of the filling or internal pressure. The height of the filling can be directly measured with a wide light beam and a large number of optical sensing elements located steps in height. Along with this there are also indirect methods of measurement, for example, using the absorption of x-rays or gamma rays, or by suppressing the oscillation of the high-frequency oscillating circuit. When measuring the fill level using x-ray or gamma-ray measuring bridge, which is on one side of the access opening has a radiation source and on the opposite side of the access opening has a detector rays, is located in the tank so that the specified height of the filling is in the center of the beam diameter. The beam may, for example, have a width of 2 with whom. The amount of absorption of x-rays or gamma-rays depends on the height of the fill, as with a higher level of filling a large part of the cross-section of the beam is absorbed by the product in the vessel, for example a liquid in the bottle. Measured by the detector, the beam power, thus, the higher, the lower the level of filling. A substantial part of the noise in this measurement is determined by the fact that the absorption of x-rays greatly depends on the atomic weight of the elements contained in the molecules of the product. This leads to the fact that two different products at the same level with other identical conditions (same capacity, same temperature, and so on) show the different absorbance values. For example, diet Cola and Cola classic show the difference in the absorbance value of about 4 percent, which means that to determine the height of the filling should introduce different threshold values to obtain a single result.

When high-frequency measurement method using high-frequency oscillating circuit measuring the suppression of the oscillations of the filling level. The fluid level changes, mainly capacitive part of the oscillating circuit, i.e. the conductivity or the dielectric constant and the resistance loss in the quality properties of the filled material or prod the KTA, along with filling level, significantly influence the measurement result. Also if you have different products, for example if there are two mineral water with different salt content, you must enter different thresholds to achieve the same result of measuring the filling level.

Another way to determine the height of filling of liquids in bottles is described in document WO 98/21557, and here the result depends, among other things, the pressure inside the bottle.

From the document WO 99/56094 known that the filling level of the tank to determine due to the fact that using a pulsed deflection of the vessel wall in producing mechanical vibrations, and then fluctuations analyze, and determine the decay time, frequency, intensity, and/or the integral intensity or maximum intensity.

Another way to determine the height of filling in containers known from WO 99/01722, and here the height of the filling is determined using an outbound capacity from thermal radiation.

Also available in a variety of ways to determine the mass of the filled containers, namely directly by weighing capacity or indirectly by measuring the absorption of x-rays given tank volume.

Product integrity traditionally checked with x the economic analysis. The integrity of the product, in particular food products, you can break unintentionally due to errors in the method of production or deliberately.

Disclosure of inventions

Technical problem

The basis of the invention lies in the task of creating a method for determining the integrity of the product.

Technical solution

According to the invention this problem is solved due to the fact that with the method specified at the beginning of the form is determined by the specified characteristic of the product using the second method of measurement and that the value of the parameters of the specified characteristic obtained by the first measurement method, compared with the value obtained by the second measurement method.

In respect of the specified characteristic it is usually about the height of the filling of the product in the tank. The first measurement method may be to determine the height of the filling as described above using x-ray radiation. The absorption of x-rays depends on the atomic weight of the elements contained in the molecules of the product. The result could be distorted due to the fact that in the studied product of the atomic weight is distributed differently than in the base product, which was calibrated measurement method. The reference product is implied by this integral or not the counterfeit product. The second method changes the mode is the filling height is measured directly, for example, by using a light beam and optical sensors or cameras. Obtained using this method, the height of the filling is independent of the atomic weights of the elements contained in the product. The height of the content obtained through both methods of measurement are compared with each other. If it turns out the difference, then this indicates that the distribution of the atomic weights in the product is not adulterated product and that the integrity of the investigated product is missing. The second measurement method can also be indirect, for example, the above-described method of determining the height of the filling with the use of high frequency. This method should also be caliberate with the base product. The measured height of the filling would be falsified if the product has a different conductivity or dielectric constant than the underlying product. By comparing the values obtained by this measurement method, with the value that was obtained by the method of measurement using x-rays, you could recognize the violation of the integrity of the product if it changes the salt content in the product.

Another example is the measurement of weight of the product. The weight can be defined, firstly, by using absorption is rentgenovskogo radiation in conjunction with optical measurement of the height of the filling and based on the known shape of the bottle. The second measurement method may comprise determining the mass by weighing. If both methods of measurement obtained different values for the mass of the product, it indicates a violation of the integrity of the product.

By defining the same characteristic of the product using two different measurement methods and by comparing the magnitudes of interference or correlation of the measurement results is possible, therefore, to establish the integrity of the product. In the above example, the definitions of the filling level with the help of x-rays and high frequencies can be achieved by correlation of the measurement results it is advisable to use the conductivity, dielectric constant, density, or chemical composition to establish deviations from the original composition of the product. These physical properties discussed above only as values of the interference. Based on the fact that both the measured filling level must correspond with each other in this parallel dimension very well set reject or product-specific parameters. With appropriate thresholds can, thus, to recognize and display a separate container from substantially deviating content of the product. Through education averages based on a large number of products (n is poizvoditelnosti modern installations for filling bottles is currently around 60,000 bottles per hour) very soon achieved a high statistical accuracy; this provides substantially the main aspect of the invention; determination of changes of the filled product in a closed and already guaranteed capacity, whether it is caused by impaired production or with the intention, as potential threats to a broad section of buyers.

A particular advantage of the invention lies in the fact that it is possible to establish the integrity of the product in closed containers. Bottles of drinks can, thus, check the integrity of the content when installed plugs. The test can thus be produced in the end of the manufacturing process.

However, contamination by radioactive substances that create radiation in the energy range 60 Kev energy region, in which the measuring method with the use of x-ray radiation could be well recognizable by increasing mean values.

Another embodiment of the invention contains an additional measurement of the absorption of x-rays in the lower part of the vessel, so that on the basis of the values of the masses of the atoms can be detected deviations in chemical composition, is not subject to the influence of the filling level, and thereby it becomes possible unambiguous definition causing a violation of the parameters. An additional dimension increases, of course, that the same measurement accuracy of the device. Similarly, you can again lower part of the vessel to determine the conductivity of the product using high-frequency transmission and receiving device so as to obtain unambiguous.

Another exemplary embodiment of the invention is to determine the internal pressure in the vessel using two different measurement methods, namely, first, using the steps described in WO 98/21557 ultrasonic method, and secondly, by using mechanical testing the pressure at which the plastic bottles by two impinging on the sides of the belt conveyors and tear using two controls the fill level is determined by the filling level in Smeaton and asmaton condition polyethylene bottle, and the output belt conveyor using a dynamometer measured internal pressure reached in plastic bottles. The change of the filling level is a measure of the pressure in the bottle. The pressure value obtained by the ultrasonic method is influenced by the composition of the gas in the head space of the vessel, while the pressure value obtained by a mechanical method, is not exposed to its negative influence.

Simultaneously with the mechanical pressure test can determine possible leakage of plastic bottles. Fur the technical test pressure may also be combined with the measurement of the height of the filling, in particular when the products after filling and capping of containers can vary its speed to create pressure, for example, depending on the content

CO2.

Additionally, you can use the camera, such as a CCD camera, or the above-mentioned ultrasonic method to install and qualify the foaming properties of the product after filling. The result can be correlated with other measurements and to enter into the picture.

Brief description of drawings

An example of carrying out the invention is explained hereinafter based on the drawings.

Figure 1 - installation to verify the integrity of the product by measuring the height of the filling level, in schematic representation.

Figure 2 - device for measuring the height of the filling level using x-rays.

Figure 3 is a device for measuring the height of the filling level by means of high frequency.

Figure 1 schematically shows an installation for carrying out the method according to the invention, the height of the filling, the bottles 10 with a drink is measured with x rays and using high frequency and the measured results are compared with each other.

Bottle 10 is moved on the conveyor 12, such as a chain conveyor, first through the first test station 20, in which the height of the filling is measured using x-ray Lu is her. Then they are moved through the second testing station 30, which is located at a slight distance beyond the first installation and in which the height of the filling is measured with a high frequency. In the control device 40 height values filling obtained when both the different measurement methods are compared with each other. If the difference between the two measured values exceeds a certain threshold, it is considered as an indication of the integrity contained in the bottles of the product, such as a drink, and the bottle withdraw from the further production process or stop the entire installation to a study to determine possible violations of the integrity contained in the beverage bottle.

Figure 2 shows in cross section, when viewed in the direction of the conveyor, the main elements of the test station 20 for measuring the height of filling of the product in the bottle 10 by means of the absorption of x-rays. The test station 20 has generally the form of a bridge with a throughput opening 22, which receives approximately the top quarter of the bottle 10 with a drink. On one side of the access opening 22 is located an x-ray tube 24 and the movable shutter 26. On the opposite side of the access opening 22 is located detector 28 x-rays. Produced by the x-ray tube 24 rays are directed to the detector 28 of x-rays. This measuring bridge is located at such a height above the conveyor, that the value of the filling level is approximately in the center of the width of the x-ray beam.

The measuring principle is that when the filling level is above the predetermined level of filling a large part of the x-ray beam passes through the product, i.e. drink, and absorbed, so that the detector 28 x-ray shows a smaller measured radiation intensity. In contrast, when a lower filling level is measured higher radiation intensity.

3, again when viewed in the direction of the conveyor, depicts the second test station 30, in which the height of the filling is measured using a high frequency. Measuring head again has the form of a bridge with a throughput opening 32. On both sides of the access opening are plate capacitor 34, which are part of the oscillatory circuit 36.

The measuring principle consists in the fact that the resonant frequency of the oscillatory circuit 36 depends on the dielectric constant of the material between the plates of the capacitor 34. With the passage of the bottle of capacity of the capacitor formed from two plates 34 of the capacitor is based on the percentage of various materials and their dielectric constants. Because liquids have a higher dielectric p is constant, than air, the resonance frequency of the oscillatory circuit 36 is influenced by the height of the filling liquid in the bottle 10. The higher the level, the more efficient electric constant between the plates 34 of the capacitor, allowing the capacitor is increased, which leads to a decrease of the oscillation frequency.

As both methods of measurement the measurement is made indirectly, namely, through the absorption of x-rays or changes of the resonant frequency, then both test stations 20, 30 before the integrity check are calibrated using one or more bottles specified, the correct height of the filling and not tampered with the contents.

The absorption of x-rays in matter depends on the atomic number of elements. Measured by the detector 28, the intensity of radiation produces the correct height of the filling only if the drink inside of verified bottle 10 according to the composition of its elements corresponds to drink in the base of the bottle, which was calibrated test station 20. The corresponding applies for the second test station 30 in relation to the dielectric constant of the liquid in the bottle 10. The integrity of the product, i.e. of the drink, the bottle 10 can be checked due to the fact that the measurement values of both test the stations 20, 30 compared in the control unit 40. If both test stations 20, 30 show distinctly different height of the filling, it means that either the atomic weight of the elements of the product, i.e. drink or dielectric constant or both of these parameters deviate from the specified value, and thus the product in an appropriate bottle 10 does not correspond to the prescribed parameters.

The list of signs:

10 bottle with drink

12 conveyor

20 test station

22 bandwidth aperture

24 x-ray tube

26 shutter

28 detector of x-rays

30 test station

32 bandwidth aperture

34 plate capacitor

36 resonant circuit

40 control device

1. The way of establishing the integrity is in the tank (10) of the product, and define a preset characteristic of the product using the first measurement method, in which first examine the physical property of the product, and
the specified characteristic further define at least directly, or using a second measurement method, which is based on a second physical property that is different from the first physical property,
determine the difference of the values referred to a given characteristic, are obtained using both methods of measurement, and
comparing said difference value is th with a specified threshold and if if the difference exceeds a specified threshold,
decide on the violation of the integrity of the mentioned product.

2. The method according to claim 1, wherein the product is a beverage in the bottle (10) and the specified characteristic is the height of the filling and the first measurement method is that the height of the filling is measured by absorption of the x-ray beam and the second measuring method is that the measure caused by a bottle of change of resonant frequency of the oscillating circuit (36).

3. The method according to claim 2, in which advanced in the field is clearly below the height of filling of the bottle with the help of x-rays determine the absorbance of the product or by using radio frequency determine the dielectric constant of the product.

4. The method according to one of claims 1 to 3, in which the average values of parameters characteristic of a large number of products that have been determined by using the first measurement method, and the average values of this characteristic, which is defined in the second measurement method, are compared with each other.



 

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