JP2008157685A - Liquid inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To discriminate whether a hazardous liquid, such as gasoline is housed in a container, even with respect to a thick-walled container, and to accurately discriminate, even for a liquid explosive substance or acidic and alkaline liquids. <P>SOLUTION: This liquid inspection device 10 is equipped with a weight sensor 14 and a dielectric constant sensor 15, both of which measure the weight and dielectric constant of the container 12 in which the liquid 13 is housed; a data base 18 on which the determine standard weight and determine the standard dielectric constant for each kind of the container 12 are recorded; and a liquid determining part 24, to which the determination standard weight, the determine standard dielectric constant, the measured weight and the measured dielectric constant are inputted. The liquid determining part 24 is constituted so as to evaluate whether the measured weight and the measured dielectric constant satisfy the determination standard weight and the determination standard dielectric constant; and if the result is unsatisfactory, the liquid 13 is determined as being a hazardous substance, and an alarm 16 is actuated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid inspection apparatus, and more particularly to a liquid inspection apparatus that inspects whether a dangerous liquid such as gasoline is present in a container such as a PET bottle.

  For passengers using passenger aircraft, baggage inspection including containers for beverages has been carried out from the viewpoint of accident prevention. Recently, terrorists posing as passengers have liquid dangerous goods such as gasoline (flammable) Stuff, explosives, etc.).

  Conventionally, a liquid inspection apparatus capable of checking the presence or absence of a liquid dangerous substance in the container has been developed. This liquid inspection apparatus measures the attribute values such as the dielectric constant and thermal conductivity of the liquid contained in the container finely, and compares the attribute values with a reference value. It is comprised so that it may be determined whether it is fresh drinking water or combustibles, such as gasoline.

  In this inspection, as shown in FIG. 5, first, the beverage container 2 containing the liquid 1 is set between a pair of electrodes 4 and 5 of the dielectric constant sensor 3 to measure the capacitance of the container 2. To do. Next, based on the measured capacitance, the dielectric constant of the liquid 1 in the container 2 is calculated and compared with a reference value to determine whether or not the liquid 1 is a dangerous substance.

For example, when the liquid 1 includes a combustible material such as ethanol, as shown in FIG. 6, since the dielectric constant differs between ethanol and water, the dielectric constant of the mixed liquid changes according to the mixing ratio of the two. Therefore, by detecting the dielectric constant, it can be determined whether or not ethanol is contained in the container 2 (see, for example, Patent Document 1).
JP-A-2005-274255.

  The conventional apparatus described in Patent Document 1 can instantaneously perform an appropriate liquid test on a PET bottle or the like whose container size is from 280 mL to 2000 mL in order to increase the types of containers that can be inspected as much as possible. .

In particular, when inspecting containers with a thicker wall than usual or containers with special shapes, such as bottles for wine such as wine and whiskey, whether or not dangerous substances such as gasoline are contained in the bottles. May not be accurately determined. The reason why accurate determination is difficult is that the filling amount of wine, whiskey, etc. contained in a bottle for liquor is not known in advance, that is, without considering the amount of liquid (residual amount) in the bottle This is because the inspection is performed using a certain threshold as a criterion. In addition, the liquid inspection method based only on the dielectric constant has a problem in that it has not been possible to determine liquid explosives, narcotics (stimulants), and acid / alkali liquids that have recently been highly inspected. There are inspection devices that use X-rays, ultrasonic waves, etc., but these are methods for measuring the density information of the inspection object, and the reason why these methods are effective for detecting dangerous materials is explosives, narcotics or acid.・ This is due to the fact that alkaline solutions generally have a higher specific gravity than water. The purpose of inspection of liquids in containers at airports is not to identify the type of liquid, This is the primary schooling that identifies whether or not dangerous goods are in the container. When focusing on this point, the inspection data to be collected is not limited to the attribute value of only the liquid in the container, but is subject to inspection. Useful information about the container and the entire liquid, i.e., the weight of the entire container containing the liquid, is also available and can be used as criteria data for liquid testing. For example, as shown in FIG. 7, since the weight distribution by size of wine is limited to a narrow range centered on a certain reference value, the primary schooling based on the measurement data is performed by measuring the weight of the container. The liquid inspection becomes possible.

  Therefore, even when the thickness or shape of the container is special, it can be accurately determined whether or not dangerous liquid is contained in the container, and the liquid is explosive, narcotic (stimulant) or acid / alkaline. In some cases, a technical problem to be solved arises so that the determination can be made, and the present invention aims to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is a liquid inspection apparatus for inspecting whether the liquid in the container is safe or dangerous, and the weight of the container containing the liquid. A weight sensor that measures the weight, a database in which a judgment reference weight for each type of the container is recorded in advance, a liquid judgment unit that inputs the judgment reference weight and the measurement weight, and a notification that informs a judgment result by the liquid judgment unit A liquid inspection apparatus configured to compare the measured weight with the determination reference weight to determine whether or not the liquid is a dangerous substance.

  According to this configuration, in the database, the determination reference weight data is recorded in advance for each container type, for example, the shape / size of the container and each brand such as whiskey and wine. The weight is taken into the liquid determination unit. In addition, a measured weight measured by the weight sensor is input to the liquid determination unit, and by comparing this measured weight with a determination reference weight, it is determined whether or not the liquid in the container is a dangerous substance.

  As a result, for example, when the measured weight is not within the range of the determination reference weight, it is determined that a dangerous liquid is contained in the container, and the fact is notified to the inspector by an indicator such as a display lamp. Therefore, even if the thickness and shape of the container are different, the liquid inspection can be performed without being affected by the influence.

  According to a second aspect of the present invention, in the liquid inspection apparatus for inspecting whether the liquid in the container is safe or dangerous, the weight sensor for measuring the weight of the container containing the liquid and the dielectric constant of the liquid in the container are measured. Input a dielectric constant sensor, a judgment reference weight for each container type, a database in which a judgment reference dielectric constant is recorded in advance, the judgment reference weight and the judgment reference dielectric constant, and a measurement weight and a measurement dielectric constant. And a notification device for notifying the determination result by the liquid determination unit, the liquid determination unit compares the measured weight and the measured dielectric constant with the determination reference weight and the determination reference dielectric constant, Provided is a liquid inspection apparatus configured to determine whether or not a liquid is a dangerous substance.

  According to this configuration, in the database, each type of container type, for example, the shape and dimensions of the container, the determination reference weight for each brand such as whiskey and wine, and each data of the determination reference dielectric constant are recorded in advance. These data are taken into the liquid determination unit as determination reference data. In addition, the liquid determination unit receives the measurement weight and the measurement dielectric constant measured by the weight sensor and the dielectric constant sensor, and compares the measurement weight and the measurement dielectric constant with the determination reference weight and the determination reference dielectric constant, respectively. It is determined whether the liquid in the container is a dangerous substance.

As a result, for example, when the measured weight is not within the range of the judgment reference weight, or when the measured dielectric constant is not within the range of the judgment reference dielectric constant, it is determined that a dangerous liquid is contained in the container. The effect is notified to the inspector by an indicator such as a display lamp. Therefore, the presence or absence of dangerous liquids is identified by considering not only the dielectric constant of the container containing the liquid but also its weight, so that even if the container thickness or shape is different, the liquid inspection is performed without being affected by it. it can.
According to a third aspect of the present invention, the dielectric constant sensor has a plurality of detection electrodes divided in the vertical direction, and the plurality of detection electrodes are arranged at a predetermined interval in the height direction of the container. A liquid inspection apparatus according to claim 1 is provided.

  According to this configuration, since the liquid level of the liquid in the container is detected by the plurality of detection electrodes, it is determined whether or not the liquid is filled in the container.

  The invention according to claim 4 is the liquid inspection apparatus according to claim 1, 2 or 3, wherein the type of the container to be inspected is limited to those permitted to be brought in beforehand according to the inspection site such as an airport. I will provide a.

  According to this configuration, the container to be inspected is limited to a predetermined type of container. For example, according to the inspection site such as an international airport, the size and brand of a container such as a plastic bottle that can be brought into the aircraft is determined in advance, and only the determined type of container is inspected, and the others are not inspected. . Whether the object to be inspected is a limited container can be automatically identified by reading the barcode of the container before the inspection. In addition, it is possible to prevent the introduction of dangerous goods while minimizing inconvenience for passengers by allowing only limited containers to be brought in, instead of prohibiting bottles containing all liquids. .

  The invention described in claim 5 provides the liquid inspection apparatus according to claim 1 or 2, wherein the database has an internet communication function.

  According to this configuration, the same data can be distributed to all the devices via the network without inputting new bottle determination standard data for each device, and the inspection level can be kept constant. .

  The invention according to claim 6 is characterized in that the determination reference weight recorded in the database is extracted by designating attribute information such as a brand name, bottle type or capacity of a container which is an object to be inspected. A liquid inspection apparatus according to 3, 4 or 5 is provided.

  According to this configuration, before inspecting the liquid discrimination in the container, the attribute information of the object to be inspected, for example, the attribute information such as brand or bottle type, capacity, etc. is specified, and the determination recorded in the database based on the specified attribute information By extracting the reference weight data and comparing the extracted data with the measured value, it is determined whether or not the liquid in the container is a dangerous substance. The attribute information of the inspection object can be input with a keyboard, a touch panel, or the like. It is also possible to input by reading a barcode attached to the bottle. Further, the determination reference weight can be set in two steps according to a standard weight range and an allowable weight range. In this case, in the attribute input step of attribute input, the type of the target bottle can be estimated by comparing the standard weight range and the measured weight with each other.

According to the first aspect of the invention, since the liquid in the container can be inspected by measuring only the weight of the container, whether the liquid is safe even when the container is thick or the shape of the container is complicated. Can be determined accurately and easily. Further, it is not necessary to measure the dielectric constant of the container, and it is also possible to discriminate against liquid explosives, narcotics (stimulants), acids / alkalis, which have been difficult to distinguish. Further, only the regular weight of the container to be inspected is recorded in the database, and it is not necessary to record the dielectric constant.
The invention according to claim 2 can identify whether or not the liquid in the container is a dangerous substance in consideration of the weight in addition to the dielectric constant of the container. Even when the shape is complicated, it is possible to accurately determine the presence or absence of a liquid dangerous substance. Furthermore, the present invention can also accurately and easily determine liquid explosives, narcotics (stimulants), and acid / alkali liquids.

  Since the invention according to claim 3 can detect whether the liquid in the container is full or not, in addition to the effect of the invention according to claim 2, the terrorist or the like is placed in the container to pass through the inspection. Even when a liquid less than a fixed amount is put, it has the merit that such an illegal act can be surely checked.

  In the invention described in claim 4, in order to inspect liquids contained in various containers such as cosmetics, it is necessary to register a large amount of judgment reference weight, but this is limited to containers specified in advance. By doing so, in addition to the effect of the invention of claim 1, 2 or 3, the data of the judgment reference weight can be reduced by that much, and the trouble of recording the judgment reference weight in the database can be saved and the accuracy is high. Liquid inspection can be performed more quickly.

  Since the invention according to claim 5 can take in data relating to the type of container to the database via the Internet, in addition to the effect of the invention according to claim 1 or 2, when registering or changing data in the database, It is possible to reduce the trouble of inputting the data registration / change operation using a keyboard or the like.

According to the sixth aspect of the invention, before inspecting the liquid discrimination in the container, the attribute information of the object to be inspected is designated, and the determination reference weight data recorded in the database is extracted based on the attribute information and compared with the measured value. By doing
In addition to the effect of the first, second, third, fourth, or fifth aspect of the invention, since the type of the target bottle can be estimated in the attribute input step of attribute input, the procedure for discriminating the liquid in the container can be simplified.

  The present invention can accurately determine whether or not a dangerous liquid is contained in the container even when the thickness or shape of the container is special, and the liquid explosive, narcotic (stimulant), acid / alkali In a liquid inspection apparatus for inspecting whether a liquid in a container is safe or dangerous with the purpose of easily determining the liquid, a weight sensor for measuring the weight of the container containing the liquid, and a dielectric constant of the liquid in the container A dielectric constant sensor for measuring the above, a judgment reference weight for each type of the container, a database in which the judgment reference dielectric constant is recorded in advance, the judgment reference weight and the judgment reference dielectric constant, and a measurement weight and a measurement dielectric constant. And a notification device for notifying the determination result by the liquid determination unit, and the liquid determination unit compares the measured weight and the measured dielectric constant with the determination reference weight and the determination reference dielectric constant. The liquid It was achieved by determining whether a hazardous material.

  A preferred embodiment of the present invention will be described below with reference to FIGS. The feature of the present embodiment is that the container is unopened or unopened at the inspection site, and if it is unopened as a result, it immediately enters the weight measurement mode and performs liquid inspection. At that time, for example, the allowable range of the weight of the container category (size 280 mL, 350 mL, etc.) is determined based on the weight data measured in advance for a large number of containers. Display on the screen. In the case of a glass or plastic container, the dielectric constant is measured on the container to check the presence or absence of a flammable liquid. If the container category cannot be estimated from the weight, enter the size of the container. Also, in the case of an opened product, the container size is input and the dielectric constant is inspected based on the input. In this case, the dielectric constant sensor detects the liquid level in the container, so that the liquid inspection can be performed with high accuracy. Can be implemented. Also, in the case of an opened product, in the case of a transparent bottle, the weight can be predicted and judged by inputting the liquid amount, for example, in units of 10%. The liquid inspection apparatus of the present embodiment is preferably used when inspecting liquid in a container, particularly at an airport, but in a passenger transport such as a ship or train, or in a container in a theater, a stadium, a public office, etc. It can also be used for the inspection of liquids.

  FIG. 1 is a circuit wiring diagram of a sensor detection unit of a liquid inspection apparatus according to the present embodiment, and FIG. 2 is an explanatory diagram of an external structure of the liquid inspection apparatus. The liquid inspection apparatus includes a liquid determination unit, a storage unit, and the like. A microcomputer is installed.

  In both figures, reference numeral 11 denotes an inspection table formed on one side of the upper surface of the liquid inspection apparatus 10, and a beverage container (bottle) 12 is placed on the inspection table 11 in an inclined or upright state at the time of inspection. In this embodiment, the size and type of the container 12 that can be inspected have a wider range than before, and may be any of a plastic bottle, a bottle for liquor, an aluminum can, a steel can, or a glass bottle.

  A weight sensor 14 for measuring the weight of the container 12 containing the liquid 13 is provided below the inspection table 11, and the dielectric of the liquid 13 in the container 12 is provided on the side of the inspection table 11. A dielectric constant sensor 15 for measuring the rate is provided. Further, an alarm device 16 with an alarm provided with a blue lamp 16A and a red lamp 16B is attached to the upper side of the inspection table 11, and the alarm device 16 automatically operates according to the result of the liquid inspection. For example, when it is determined that there is a liquid dangerous substance in the container 12, the red lamp 16B is turned on and an alarm is sounded.

  In addition, a keyboard 17 is provided on the other side of the upper surface of the liquid inspection apparatus 10, and the keyboard 17 stores data relating to the type including the size and brand of the container 12 as a storage unit (database 18) or a determination unit (liquid determination unit 24). To enter. A liquid crystal display 19 is installed on the upper side of the keyboard 17, and the liquid crystal display 19 displays a data input value, a sensor measurement value, a liquid determination result, and the like on the screen.

  Further, a barcode reader 20 such as an infrared scanner system is attached to the front surface of the liquid inspection apparatus 10, and the barcode reader 20 reads the barcode displayed on the outer surface of the container 12 to determine the size and brand of the container 12. Etc., data relating to the type of data is input to the database 18. Since the liquid inspection apparatus 10 of this embodiment is equipped with an internet communication function, the latest type data of the container 12 can be directly taken into the database 18 as needed.

  As shown in FIG. 1, the dielectric constant sensor 15 for measuring the dielectric constant of the liquid 13 is divided into three detection electrodes in the vertical direction, and the three detection electrodes 21 to 23 are predetermined in the height direction of the container 12. They are arranged at intervals. Note that a counter electrode (not shown) is disposed close to the opposite side of the detection electrodes 21 to 23 from the container 12.

  The detection electrodes 21 and 23 on both the upper and lower sides are respectively disposed at height positions corresponding to the upper and lower portions of the container 12, and the intermediate detection electrode 22 is disposed at a height position corresponding to the intermediate portion of the container 12. ing. Therefore, since the measurement values by the detection electrodes 21 to 23 change according to the liquid level height of the liquid 13 in the container 12, the liquid level height in the container 12 based on the measurement values of the detection electrodes 21 to 23. That is, the filling degree of the liquid 13 can be detected. Here, the filling degree of the liquid 13 refers to the filling ratio of the liquid amount with respect to the full amount of the unopened container 12, that is, the normal filling amount before use of the liquid 13.

  The detection electrodes 21 to 23 of the weight sensor 14 and the dielectric constant sensor 15 are electrically connected to a liquid determination unit 24 composed of a CPU by cables 25 to 28, respectively, and three measurement values by the detection electrodes 21 to 23 are automatically detected. And can be selectively input to the liquid determination unit 24. Further, the measured weight and the measured dielectric constant measured by the detection electrodes 21 to 23 of the weight sensor 14 and the dielectric constant sensor 15 are configured to be automatically transmitted to the liquid determination unit 24.

A database 18 is connected to the liquid determination unit 24. The database 18
A large number, for example, 10,000 or more kinds of determination reference weights for each type of the container 12 containing the liquid 13 and determination reference dielectric constant (threshold value of dielectric constant) which is attribute data of the liquid 13 are recorded.

  In this embodiment, the standard weight range A and the allowable weight range B shown in FIG. Here, the standard weight range A refers to a certain range of weights based on the weight of a specific bottle type, for example, the weight of a standard container 12 of a 350 mL plastic bottle or a burgundy type wine. When the weight within the standard weight range A is measured, the liquid determination unit 24 determines that the type of container 12 belonging to the type (category) is placed on the inspection table 11.

  The allowable weight range B is a certain range of weights based on the weight of the standard container 12 as in the standard weight range A. After the container 12 is specified, the liquid 13 in the container 12 is specified. Means a threshold value that is judged to be a safe content, and more specifically, an allowable maximum range in consideration of weight variation (statistical error value) that is unavoidable in manufacturing the container 12. In this embodiment, when the measured weight is not within the allowable weight range B, it is determined that the liquid 13 in the container 12 is not safe. In this way, by adopting the allowable weight range B as a criterion for determining whether or not the liquid 13 is safe, it is possible to absorb and remove the variation in weight that occurs in the production of the container 12, so that more accurate liquid inspection can be performed. it can.

  The types of containers 12 that can be inspected in this embodiment are filled with juices, coffee, bottles and cans filled with mineral water, etc., or sake such as sake, shochu, whiskey, wine, brandy, etc. There are various types such as bottles, and the types differ depending on the shape and size of the container 12.

  Further, the containers 12 to be inspected by the liquid inspection apparatus 10 can be limited to the types of containers 12 determined in advance according to conditions such as the inspection site. For example, the type of container 12 such as a plastic bottle that can be brought into the aircraft on the administrative side is determined in advance, and only the determined type of container 12 is inspected, and the other containers 12 are not inspected. , You may make it prohibited to bring it into the cabin.

  Thus, the liquid determination unit 24 determines the reference weight (standard weight range A, allowable weight range B) recorded in the database 18 with respect to the measured weight and measured dielectric constant measured by the weight sensor 14 and the dielectric constant sensor 15. ) And the determination reference dielectric constant, it is evaluated whether the liquid 13 in the container 12 is safe according to the result. The determination result is automatically transmitted to the alarm device 16 and the liquid crystal display device 19 and is immediately notified to the inspector by the alarm device 16 and the liquid crystal display device 19.

  In this embodiment, in the weight measurement of the alcohol container 12, at first, matching with the weight of the container 12 is not performed. As shown in Table 1, alcoholic beverages are divided into nine subcategories, Estimate whether it is a category beverage. If the bottle is not actually an estimated category, it is possible to enter the bottle category manually. In this case, if it is determined by manual input of the weight that the category is not correctly estimated, the category of the container 12 having the next closest weight is estimated. Thereafter, the same processing is repeated to finally identify the type of the container 12.

  In this way, after identifying the type of the container 12, if the measured weight is within the allowable weight range B, it is accepted. Otherwise, the weight data for each brand is converted from the categories shown in Table 1. The same processing as described above is performed after switching.

  As described above, the liquid inspection apparatus 10 measures the weights of different sizes including glass bottles in addition to the conventionally measured inspection items of the dielectric constant for the inspection of the container 12, and data for liquid inspection of the measured values. Used as For example, there is a case where a container 12 containing wine or liquor is brought into a passenger plane by a terrorist or the like without opening it for the purpose of a souvenir, etc. This can be dealt with by the following procedure.

  That is, in order to deal with the unopened container 12, the weight and the dielectric constant, which are determination reference values for each type of the container 12 before opening, are registered in the database 18 in advance. Then, the user inputs only whether the container 12 is unopened or has been opened, and in the case of unopened, immediately enters the weight measurement mode and inspects. At that time, if the measured value is included in the weight tolerance range B of the category of the container 12 (size 280 mL, 350 mL, etc.), the dielectric constant is measured after displaying the type of the container 12 on the screen, and the like. Check for existence. As a result, when the measured value is different from the determination reference value by a predetermined value or more, the notification device 16 is operated to notify the operator that an abnormal inspection result has been obtained.

  In the case of the metal container 12, the present invention measures the weight to determine the type of the liquid 13. In the case of the non-metal container 12, the weight sensor 14 and the dielectric constant sensor 15 are used to determine the weight and dielectric. The rate is measured, and the type of the liquid 13 is determined by the combination. That is, the liquid 13 is determined by comparing the measured value of weight and / or dielectric constant with reference value data registered in the database 18. According to this inspection principle, the liquid 13 in various bottles can be determined by measuring either the weight alone, the combination of weight and dielectric constant, or only the dielectric constant according to the material of the container 12. The 12 materials can be effectively applied regardless of the type of non-metal such as steel or aluminum can or glass or plastic.

  Even when a container 12 of bottles, that is, a glass container 12 having a large thickness or a glass container 12 having a special shape is inspected, a standard regular weight of the container 12 itself is measured in advance to measure the database 18. This registration data is used as a criterion. Then, by comparing with the measurement data obtained by the weight sensor 14, it can be accurately identified whether or not the liquid 13 is a dangerous substance.

  Furthermore, in the conventional inspection method that relies on only the dielectric constant data of the liquid 13, it is difficult to determine the liquid in the container 12, that is, a liquid containing drugs such as narcotics, or an acidic or alkaline liquid. It is possible to accurately and effectively identify toxic liquids such as.

  Next, a specific inspection procedure according to the present embodiment will be described in detail with reference to FIG. First, it is judged and selected whether the type of the container 12 is a pet bottle, a metal can (aluminum can or steel can), or an alcohol bottle (S1 to S4). For example, when a plastic bottle is selected, it is determined whether or not the liquid 13 is fully filled (unopened) in the container 12, and if it is full, the weight of the container 12 is measured and within the standard weight range. Judge whether there is. If it is within the range, the dielectric constant of the liquid 13 is measured to determine whether or not the measured value satisfies a predetermined threshold (threshold) (S5 to S8).

  As a result, if it is equal to or greater than the threshold value, the blue lamp 16A is turned on. If the size of the container 12 is registered in the database 18, the size of the container 12 is input, and the container 12 is the same as the registered one. It is determined whether or not (S9 to S12). If they are the same, or if the measured value is less than the threshold value in S8, the red lamp 16B is turned on and then cleared and set in an input waiting state, and the process proceeds to S13 (S16 to S17). . In S13, it is determined whether or not the input data of the container 12 is changed, and the process proceeds to S6, S18, or S20 depending on whether or not there is a change.

  If the standard weight range is exceeded in S7, the size of the container 12 is input to determine whether it is within the allowable weight range of the container 12, and if it is within the above range, the process proceeds to S8. The process proceeds to S16 (S14 to S15).

  On the other hand, if the liquid 13 is not fully filled in S5, the process proceeds to S18 or S20. In S18, the size of the container 12 is input, it is determined whether or not it is within the standard weight range, and if it is within the standard weight range, one of the three detection electrodes 21 to 23 of the dielectric constant sensor 14 is selected. Then, the dielectric constant of the liquid 13 is measured. Then, it is determined whether or not the measured value satisfies a predetermined threshold value. If the measured value is equal to or less than the threshold value, the blue lamp 16A is turned on and then cleared and set in an input waiting state. Transition (S18 to S23).

  If YES in S19 or S21, the process proceeds to S16. In S24, it is determined whether or not the input data of the container 12 is changed, and the process proceeds to S6, S18, or S20 depending on whether or not there is a change.

  On the other hand, when the type of the container 12 is a metal can in S1, it is determined whether or not the liquid 13 is full. The weight is measured to determine whether it is within the standard weight range. As a result, if it is within the above range, the blue lamp 16A is turned on, and if not, the size of the container 12 is input to determine whether it is within the allowable weight range. If the allowable weight range is exceeded, the red lamp 16B is turned on and then cleared to wait for input (S25 to S35).

  In S1, if the type of the container 12 is an alcohol bottle, the type of wine, whiskey, brandy or the like is input to measure the weight of the container 12. Then, it is determined whether or not the measured value is within the standard weight range, and if it exceeds the standard weight range, the display indicating that the inspection is not possible is performed, and then the state is awaited for input (S36 to S40).

  On the other hand, if it is within the standard weight range, if the first candidate of the brand such as wine is displayed and matches, it is determined whether the measured value is within the allowable weight range, and if within the allowable weight range, After the blue lamp 16A is lit up, it is cleared to wait for input (S41 to S45). If NO in S42, the first candidate of the brand such as wine is excluded and the process returns to S38. If NO in S43, the input data of the container 12 is switched and the process returns to S38 (S46 to S47). .

  As described above, according to the present embodiment, the database 18 includes the type of container 12, for example, the shape / dimension size of the container 12 and the determination reference weight data and dielectric constant data for each brand such as whiskey and wine. Recorded in advance, the recorded data is taken into the liquid determination unit 24 as reference data. The liquid determination unit 24 receives the measured weight and the measured dielectric constant detected by the weight sensor 14 and the dielectric constant sensor 15, and compares the measured weight and the measured dielectric constant with the determination reference weight data and the determination reference dielectric constant data. Then, it is determined whether or not it is within a predetermined range.

  Thus, when the measured value is outside the predetermined range, it is determined that the liquid 13 in the container 12 is not a safe solution containing water as a main component but a dangerous substance such as gasoline, and this is indicated by a lamp. Alternatively, the alarm is sounded and the screen is displayed. Accordingly, the present invention examines the liquid 13 in consideration of not only the dielectric constant of the container 12 but also the weight of the container 12, so that whether or not the liquid 13 is a dangerous substance even if the container 12 is thick. Can be accurately determined. It can also be determined by liquid explosives, drugs, acidic or alkaline liquids.

Furthermore, since the liquid level height of the liquid 13 in the container 12 is detected by the plurality of detection electrodes 21 to 23, it is determined whether the liquid 13 is filled in the container 12 or less than that. I can grasp. Therefore, for example, even when a terrorist or the like puts a predetermined amount or less of the liquid 13 in the container 12, this can be detected to prevent an inspection error.

  Furthermore, the type of the container 12 as the object to be inspected is limited to, for example, PET bottles or glass bottles of a predetermined standard that are determined to be carry-on by each airline company, so that liquid inspection can be performed more accurately. In this case, whether or not the container 12 is limited can be automatically identified by reading the barcode of the container 12.

  Here, it is also assumed that the container 12 is filled with a combustible liquid such as gasoline and the weight of the container 12 containing the liquid 13 is intentionally changed to be the same as the normal weight. On the other hand, since the determination is made by combining the weight of the container 12 and the dielectric constant of the liquid 12, it is possible to easily check the change of the measurement value accompanying the change of the filling amount of the liquid 13 with the liquid crystal display 19. it can.

  Furthermore, by arranging the electrodes 21 to 23 constituting the detection part of the dielectric constant sensor 15 corresponding to the upper part, the middle part, and the lower part of the container 12, the liquid level of the liquid 13 is a normal upper position in the container 12 ( The dielectric constant of the liquid 13 in the container 12 can be measured even at an intermediate position or a lower position instead of the full amount.

  Thus, since the filling amount of the liquid 13 in the container 12 can be estimated, the weight determination is performed only by the weight sensor 14 when the liquid 13 is full, and only the dielectric constant measurement by the dielectric constant sensor 15 is performed otherwise. Thus, it can be determined whether or not the liquid 13 is dangerous.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The circuit wiring diagram of the sensor detection part of the liquid test | inspection apparatus which shows one Example of this invention. The perspective view which shows the example of an external appearance structure of the liquid test | inspection apparatus which concerns on one Example. The graph explaining the criteria range (standard weight range and allowable weight range) of liquid inspection. The flowchart which shows the liquid test example by the liquid test | inspection apparatus of a present Example. Explanatory drawing which shows the conventional liquid test | inspection apparatus. The graph explaining the difference in the measured value of water and ethanol. The graph explaining an example of the weight distribution of the wine bottle which is a to-be-inspected object.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Liquid test | inspection apparatus 11 Test stand 12 Container 13 Liquid 14 Weight sensor 15 Permittivity sensor 16 Alarm 17 Keyboard 18 Database 19 Liquid crystal display 20 Bar code readers 21-23 Detection electrode 24 Liquid determination part

Claims (6)

In the liquid inspection device that inspects whether the liquid in the container is safe or dangerous,
A weight sensor for measuring the weight of the container containing the liquid;
A database in which the determination standard weight for each type of the container is recorded in advance;
A liquid determination unit for inputting the determination reference weight and the measured weight;
A notification device for notifying the determination result by the liquid determination unit;
The liquid determining unit compares the measured weight with the determination reference weight to determine whether or not the liquid is a dangerous substance. In the liquid inspection device that inspects whether the liquid in the container is safe or dangerous,
A weight sensor for measuring the weight of the container containing the liquid;
A dielectric constant sensor for measuring the dielectric constant of the liquid in the container;
A judgment standard weight for each type of the container, and a database in which a judgment standard dielectric constant is recorded in advance,
A liquid determination unit for inputting the determination reference weight and the determination reference dielectric constant, and the measurement weight and the measurement dielectric constant;
A notification device for notifying the determination result by the liquid determination unit;
The liquid determining unit compares the measured weight and measured dielectric constant with the determination reference weight and determination reference dielectric constant to determine whether or not the liquid is a dangerous substance. The dielectric constant sensor has a plurality of detection electrodes divided in the vertical direction, and the plurality of detection electrodes are arranged at a predetermined interval in the height direction of the container. 2. The liquid inspection apparatus according to 2. 4. The liquid inspection apparatus according to claim 1, wherein the types of containers to be inspected are limited to those permitted to be brought in beforehand in accordance with an inspection site such as an airport.   3. The liquid inspection apparatus according to claim 1, wherein the database has an internet communication function.   The determination reference weight recorded in the database is extracted by designating attribute information such as a brand of a container as an object to be inspected, a bottle type or a capacity, and the like. Or the liquid test | inspection apparatus of 5.

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