CN103076139A - Internal pressure detection method and device of food container - Google Patents
Internal pressure detection method and device of food container Download PDFInfo
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- CN103076139A CN103076139A CN2012105755761A CN201210575576A CN103076139A CN 103076139 A CN103076139 A CN 103076139A CN 2012105755761 A CN2012105755761 A CN 2012105755761A CN 201210575576 A CN201210575576 A CN 201210575576A CN 103076139 A CN103076139 A CN 103076139A
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Abstract
The invention provides an internal pressure detection method and an internal pressure detection device of a food container. The device comprises a displacement detection module, a temperature detection module and a processing module, wherein the displacement detection module is used for detecting the distance from each point on a cover surface of the food container to the displacement detection module at a set point in a displacement change process from the food container on a production line to the set point; the temperature detection module is used for detecting the temperature of the food container; the processing module is used for obtaining a cover surface curve of the food container according to the distance from each point on the cover surface of the food container to the displacement detection module detected by the displacement detection module; and whether the internal pressure of the food container exceeds a normal range or not is judged according to the cover surface curve of the food container and a preset cover surface curve corresponding to the temperature of the food container detected by the temperature detection module. According to the method and the device, the influence of temperature change on the food container is considered, and the accuracy of an internal pressure detection result of the food container can be improved.
Description
Technical field
The present invention relates to the food security technical field, relate in particular to a kind of interior pressure detection method and device of food containers.
Background technology
The beverage of poor sealing can cause the harm such as gas leakage, leakage, microbial reproduction, and therefore, whether the inspection container-packed beverage leaks and become most important.The beverage manufacturer must with the risk control of product that poor sealing is arranged in inside plants, cause food security to complain or accident in case flow in consumer's hand.
In the prior art, adopt the sonic detection method, by the vibration metal guide rail supersonic oscillations that generator produces are transferred to container, wavelength and the frequency of the sound signal of returning according to container are determined hyperacoustic attenuation degree that generator sends, with the interior pressure of definite container.Yet this detection method is subjected to the impact of temperature larger, thereby causes testing result inaccurate.
Summary of the invention
The invention provides a kind of interior pressure detection method and device of food containers, in order to solve prior art to pressing the inaccurate problem of testing result in the beverage.
On the one hand, the invention provides a kind of interior pressure pick-up unit of food containers, this device comprises: displacement detection module, temperature detecting module and processing module; Described displacement detection module is used for food containers on production line apart from the change in displacement process of set point, detects the distance of each point and described displacement detection module on the capping of described food containers at described set point; Temperature detecting module is for detection of the temperature of described food containers; Described processing module is used for the capping curve that the distance of each point and described displacement detection module on the capping of the described food containers that detects according to described displacement detection module obtains described food containers; The default capping curve corresponding to temperature of the described food containers that detects according to the capping curve of described food containers and described temperature detecting module judges whether the interior pressure of described food containers exceeds normal range.
On the other hand, the present invention also provides a kind of interior pressure detection method of food containers, the method comprises: in the change in displacement process of the food containers on production line apart from set point, detect the distance of each point and described displacement detection module on the capping of described food containers at described set point, and detect the temperature of described food containers; The distance of each point and described displacement detection module obtains the capping curve of described food containers on the capping of the described food containers that detects according to described displacement detection module; According to the capping curve of described food containers and the default capping curve corresponding to temperature of the described food containers that detects, judge whether the interior pressure of described food containers exceeds normal range.
Interior pressure detection method and the device of food containers provided by the invention, obtain the capping curve of food containers according to the distance of each point and displacement point on the capping of the food containers on the production line that detects, whether the interior pressure of judging the food containers of surveying according to the default capping curve corresponding to temperature of the capping curve of the food containers that obtains and food containers exceeds normal range.The method has been considered the impact of temperature variation on food containers, improves food containers leak detection result's accuracy.
Description of drawings
Fig. 1 is the structural representation of an embodiment of interior pressure pick-up unit of food containers of the present invention;
Figure 2 shows that the schematic diagram of the capping curve of the food containers that employing method of the present invention obtains;
Curve synoptic diagram when Fig. 3 is the lid, particularly for foodstuff containers facial disfigurement;
Fig. 4 is the schematic diagram of lid, particularly for foodstuff containers surface curve provided by the invention under the varying environment temperature;
Fig. 5 is the structural representation of interior another embodiment of pressure pick-up unit of food containers of the present invention;
Fig. 6 is the process flow diagram of an embodiment of interior pressure detection method of food containers of the present invention.
Embodiment
Fig. 1 is the structural representation of an embodiment of interior pressure pick-up unit of food containers of the present invention, and as shown in Figure 1, this device comprises: displacement detection module 101, temperature detecting module 102 and processing module 103;
Wherein, displacement detection module 101 is used for: the food containers on production line is apart from the change in displacement process of set point, detects the distance of each point and displacement detection module on the capping of food containers at set point;
The food containers that relates among the present invention can be to be equipped with such as container body that can, mixed congee, fizz or liquid beverage etc. are equipped with.The material of container can be all kinds such as glass container, plastic containers, aluminum or paster pop-top container, does not make restriction at this.Owing to having certain interior pressure in the food containers, therefore, when leaking appearred in food containers, changing will appear in interior pressure, thereby caused the capping distortion of food containers.
Among the present invention, by the capping type variable of the food containers on the production line and the temperature of food containers are detected to determine whether the interior pressure of food containers exceeds normal range.If the interior pressure of food containers exceeds normal range, for example: interior pressure be higher than normal in the pressure scope or in force down pressure scope in normal, all may cause the leakage of food containers.
Concrete, food containers can adopt the equipment such as travelling belt to carry, and displacement detection module 101 can be for having all kinds sensor of distance detection function, for example: infrared ray sensor, eddy current sensor etc.Displacement detection module 101 is fixed on set point, can be in the food containers transport process, in the process that the instant food container changes apart from the displacement of set point, detect at set point that each point and displacement detection module 101(are set point on the capping of food containers) distance.
Need to prove, the 101 performed operations of temperature detecting module 102 and displacement detection module there is no the restriction of sequencing.For example: temperature detecting module 102 can detect synchronously with displacement detection module 101; Perhaps, temperature detecting module 102 can detect after displacement detection module 101 begins to detect again, and perhaps, displacement detection module 101 can also detect after temperature detecting module 102 begins to detect again.
The interior pressure of food containers can be subject to the impact of temperature and produce the phenomenon of expanding with heat and contract with cold, that is to say, under different temperatures, the interior pressure situation of food containers is different, thereby the capping deformation extent of food containers is not identical yet, therefore, can adopt the temperature of 102 pairs of food containers of temperature detecting module to detect.Corresponding, interior pressure under can pre-stored different temperatures in the processing module 103 is in the capping curve corresponding to food containers of normal range, thereby can be according to the default capping curve under the pre-stored different temperatures as benchmark, the capping curve and the default capping curve that reality are detected the food containers that obtains compare, thereby whether the interior pressure of accurately judging food containers exceeds normal range, so that testing result is more accurate.
Optionally, processing module 103 can be in a coordinate plane, and another is ordinate on the capping of food containers in the direction of motion of the distance of each point and displacement detection module and food containers as horizontal ordinate, obtains the capping curve of food containers.For instance, processing module 103 can be ordinate with the distance of each point and displacement detection module on the capping of food containers, take the direction of motion of food containers as horizontal ordinate, draws out the capping curve of food containers in coordinate plane.
Figure 2 shows that the schematic diagram of the capping curve of the food containers that employing method of the present invention obtains, processing module 102 can detect according to displacement detection module 101 distance of each point and displacement detection module 101 on the capping of the body container that obtains, and obtains the capping curve of food containers.Wherein, the capping curve that obtains can comprise three exemplary position A, B, C, the point that A point and the C point point on can the edge of corresponding food containers capping, B point can corresponding food containers capping medium positions.The coordinate figure that A, B, C on can the capping curve is 3 compares.If the ordinate value that A point and C are ordered differs larger, illustrate that then the capping of food containers may occur " askew lid " or the distortion of salient angle or depression, as shown in Figure 3.
Interior pressure that can pre-stored various food-bottle temperature in the processing module 103 is in the capping curve corresponding to food containers of normal range, default capping curve corresponding under the capping curve of the food containers that again detection is obtained and the food-bottle measured temperature compares, if the relative A point of Y value that B is ordered in the difference of the Y value that the relative A point of the Y value that B is ordered in the capping curve of food containers and C are ordered and the pre-stored capping curve is compared with the difference of the Y value that C is ordered, surpass certain setting threshold, can determine that then the interior pressure of food containers exceeds the degree of normal range, and then the possible leakiness of definite food containers.Generally speaking, if the capping curve of food containers is depression profile low between the senior middle school of two ends, and the center section of depression profile is not higher than the center section of default capping curve, and the interior pressure that then usually can judge food containers is in normal range; If the capping curve of food containers is the low middle high outstanding curve in two ends, because the normal detected capping curve of food containers that does not occur to reveal is depression profile usually under each temperature, therefore, the interior pressure that then can judge food containers exceeds normal range.The capping curve that is the food containers that detection obtains under the varying environment temperature shown in Figure 4.
The interior pressure pick-up unit of the food containers that the present embodiment provides, obtain the capping curve of food containers according to the distance of each point and displacement point on the capping of the food containers on the production line that detects, whether the interior pressure of judging the food containers of surveying according to the default capping curve corresponding to temperature of the capping curve of the food containers that obtains and food containers exceeds normal range.The method has been considered the impact of temperature variation on food containers, improves food containers leak detection result's accuracy, and can not cause damage to container.
Fig. 5 is the structural representation of interior another embodiment of pressure pick-up unit of food containers of the present invention, as shown in Figure 5, and on basis embodiment illustrated in fig. 1,
The interior pressure pick-up unit of this food containers can also comprise: travelling belt 104 is used for carrying food containers A, so that food containers A changes apart from the displacement of set point.
Further, the interior pressure pick-up unit of this food containers can also comprise: approach switch 105, be used for reaching setting value at food containers A apart from the distance of set point, trigger displacement detection module 101 and carry out distance and detect, and/or triggering temperature detecting module 102 carried out temperature detection.
The support component that can also comprise support 106 necessity such as grade in the interior pressure pick-up unit of this food containers can be used for installing displacement detection module 101, temperature detecting module 102 and approach switch 105 etc.
In actual testing process, food containers A can transmit the interior pressure pick-up unit that enters food containers by travelling belt 104, after approach switch 105 is sensed food containers A and is reached setting value apart from the distance of set point, triggering temperature detecting module 102 and displacement detection module 101 begins to detect, temperature detecting module 102 can detect the temperature that obtains food containers, displacement detection module 101 can detect the capping curve that obtains food containers, processing module 103 can be carried out data acquisition and processing (DAP) to the testing result of temperature detecting module 102 and displacement detection module 101, obtains the lid, particularly for foodstuff containers surface curve under the varying environment temperature.
The interior pressure pick-up unit of the food containers that the present embodiment provides, obtain the capping curve of food containers according to the distance of each point and displacement point on the capping of the food containers on the production line that detects, whether the interior pressure of judging the food containers of surveying according to the default capping curve corresponding to temperature of the capping curve of the food containers that obtains and food containers exceeds normal range.The method has been considered the impact of temperature variation on food containers, improves food containers leak detection result's accuracy, and can not cause damage to container.
Fig. 6 is the process flow diagram of an embodiment of interior pressure detection method of food containers of the present invention, and as shown in Figure 6, the method may further comprise the steps:
In S601, the change in displacement process of the food containers on production line apart from set point, the distance of each point and displacement detection module on the capping of set point detection food containers, and the temperature of detection food containers;
The distance of each point and displacement detection module obtains the capping curve of food containers on the capping of S602, the food containers that detects according to displacement detection module;
S603, according to the default capping curve corresponding to temperature of the capping curve of food containers and the food containers that detects, judge whether the interior pressure of food containers exceeds normal range.
Optionally, the capping curve that the distance of each point and displacement detection module obtains food containers on the capping of the food containers that detects according to displacement detection module can be specially: in coordinate plane on the capping of food containers one in the direction of motion of the distance of each point and displacement detection module and food containers as horizontal ordinate, another is ordinate, obtains the capping curve of food containers.
Optionally, according to the capping curve of food containers and the default capping curve corresponding to temperature of the food containers that detects, whether the interior pressure of judging food containers exceeds normal range can be specially: if the capping curve of food containers is depression profile low between the senior middle school of two ends, and the center section of depression profile is not higher than the center section of default capping curve, judges that then the interior pressure of food containers is in normal range; If the capping curve of food containers is the low middle high outstanding curve in two ends, judge that then the interior pressure of food containers exceeds normal range.
The interior pressure detection method of the food containers that the present embodiment provides can adopt the interior pressure pick-up unit of food containers provided by the invention to realize, the process that the method realizes can referring to the associated description among Fig. 1-embodiment illustrated in fig. 5, not repeat them here.
The interior pressure detection method of the food containers that the present embodiment provides, obtain the capping curve of food containers according to the distance of each point and displacement point on the capping of the food containers on the production line that detects, whether the interior pressure of judging the food containers of surveying according to the default capping curve corresponding to temperature of the capping curve of the food containers that obtains and food containers exceeds normal range.The method has been considered the impact of temperature variation on food containers, improves food containers leak detection result's accuracy, and can not cause damage to container.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although with reference to aforementioned each embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. the interior pressure pick-up unit of a food containers is characterized in that, comprising: displacement detection module, temperature detecting module and processing module;
Described displacement detection module is used for food containers on production line apart from the change in displacement process of set point, detects the distance of each point and described displacement detection module on the capping of described food containers at described set point;
Temperature detecting module is for detection of the temperature of described food containers;
Described processing module is used for the capping curve that the distance of each point and described displacement detection module on the capping of the described food containers that detects according to described displacement detection module obtains described food containers; The default capping curve corresponding to temperature of the described food containers that detects according to the capping curve of described food containers and described temperature detecting module judges whether the interior pressure of described food containers exceeds normal range.
2. device according to claim 1, it is characterized in that, described processing module specifically is used for: in coordinate plane on the capping of described food containers one of the direction of motion of the distance of each point and described displacement detection module and described food containers as horizontal ordinate, another is ordinate, obtains the capping curve of described food containers.
3. device according to claim 1 and 2, it is characterized in that, described processing module specifically is used for: if the capping curve of described food containers is depression profile low between the senior middle school of two ends, and the center section of described depression profile is not higher than the center section of described default capping curve, judges that then the interior pressure of described food containers is in described normal range; If the capping curve of described food containers is the low middle high outstanding curve in two ends, judge that then the interior pressure of described food containers exceeds described normal range.
4. device according to claim 1 and 2 is characterized in that, also comprises:
Travelling belt is used for carrying described food containers, so that the displacement of the described set point of described food containers distance changes.
5. device according to claim 1 and 2 is characterized in that, also comprises:
Approach switch is used for reaching setting value in the distance of the described set point of described food containers distance, triggers described displacement detection module and carries out the distance detection, and/or trigger described temperature detecting module and carry out temperature detection.
6. the interior pressure detection method of a food containers is characterized in that, comprising:
In the change in displacement process of food containers on production line apart from set point, detect the distance of each point and described displacement detection module on the capping of described food containers at described set point, and detect the temperature of described food containers;
The distance of each point and described displacement detection module obtains the capping curve of described food containers on the capping of the described food containers that detects according to described displacement detection module;
According to the capping curve of described food containers and the default capping curve corresponding to temperature of the described food containers that detects, judge whether the interior pressure of described food containers exceeds normal range.
7. method according to claim 6 is characterized in that, the distance of each point and described displacement detection module obtains the capping curve of described food containers on the capping of the described described food containers that detects according to described displacement detection module, comprising:
In coordinate plane on the capping of described food containers one in the direction of motion of the distance of each point and described displacement detection module and described food containers another is ordinate as horizontal ordinate, obtain the capping curve of described food containers.
8. according to claim 6 or 7 described methods, it is characterized in that, described according to described food containers the capping curve and the default capping curve corresponding to temperature of the described food containers that detects, judge whether the interior pressure of described food containers exceeds normal range, comprising:
If the capping curve of described food containers is depression profile low between the senior middle school of two ends, and the center section of described depression profile is not higher than the center section of described default capping curve, judges that then the interior pressure of described food containers is in described normal range; If the capping curve of described food containers is the low middle high outstanding curve in two ends, judge that then described food containers exceeds described normal range.
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| CN2012105755761A CN103076139A (en) | 2012-12-26 | 2012-12-26 | Internal pressure detection method and device of food container |
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| CN2012105755761A CN103076139A (en) | 2012-12-26 | 2012-12-26 | Internal pressure detection method and device of food container |
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- 2012-12-26 CN CN2012105755761A patent/CN103076139A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003106923A (en) * | 2001-07-27 | 2003-04-09 | Cosmo Instruments Co Ltd | Method for obtaining drift value of leak inspection device, method for obtaining method for obtaining drift value of leak inspection device, method for obtaining zero point fluctuation value, method for compensating drift of leak inspection device, and leak inspection device |
| US20080127716A1 (en) * | 2004-06-07 | 2008-06-05 | Matts Eliasson | Apparatus and Method for Testing Flexible Packages for Defects |
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Application publication date: 20130501 |