JP4781072B2 - RFID tag and contactless data carrier system - Google Patents

Description

  The present invention relates to an RFID tag suitable for use in management of an aspect in which the weight changes due to the difference in the inventory amount of the management target, such as management of medicines / drugs / dangerous goods, product shelf management, product sales management, etc. It relates to data carrier systems.

  For example, in the case of a medicine, it is generally managed in a manner as shown in FIGS. FIG. 2 is a schematic diagram showing a medicine management and weighing image generally performed conventionally, and FIG. 3 is a schematic diagram showing a weighing image using a conventional RFID tag.

  2 in FIG. 2 is a management shelf. A plurality of medicine bottles 2 are stored in the management shelf 1. Reference numeral 3 in the figure denotes electronic cracking. The electronic bottle 3 is used to measure the amount of the medicine by measuring the weight of the medicine bottle 2.

  Usually, the room in which the management shelf 1 is installed is locked, and is a system in which the lock is released with an RFID card or the like to enter and exit.

  When taking out the medicine, unlock it with an RFID card or the like and enter the room, take out the medicine bottle 2 from the management shelf 1, place it on the electronic peel 3, and remove the medicine bottle 2 after taking out the necessary amount of medicine. The amount of chemicals is controlled by weighing.

  As shown in FIG. 3, RFID 4 is attached to the medicine bottle 2. The RFID 4 has a built-in memory, and necessary information (generally, date, name, weight, etc.) is written in the memory. 3 in FIG. 3 is an antenna. The antenna 5 transmits / receives information to / from the RFID 4. Reference numeral 6 denotes an R / W (reader / writer). The R / W 6 is connected to the antenna 5 and transmits / receives information to / from the RFID 4, reads information recorded in the memory in the RFID 4, and writes necessary information in the memory. Reference numeral 7 denotes a management personal computer. The management personal computer 7 takes in the measurement data from the electronic peel 3 and controls the R / W 6 to write the measurement data in the RFID 4 memory.

  An example in which the measurement data is written and managed in the RFID 4 attached to the medicine bottle 2 is shown below.

  A desired medicine bottle 2 is taken out from the management shelf 1, a required amount of medicine is taken out from the medicine bottle 2, placed on the electronic peel 3, and the medicine bottle 2 after taking out the medicine is weighed. The electronic hammer 3 transmits the measured weighing data of the medicine bottle 2 to the management personal computer 7. Then, the management personal computer 7 controls the R / W 6 to write the measurement data in the RFID 4 memory pasted on the medicine bottle 2. That is, the date, name, weight, and the like of taking out the medicine are written into the RFID 4 memory pasted on the medicine bottle 2 through the antenna 5.

  Next, the medicine bottle 2 is returned to its original position, and the medicine taken out from the medicine bottle 2 is taken out of the room.

  In this case, the person who brought out the medicine can be grasped from the identification information of the RFID card when passing through the door using the RFID card possessed by the individual.

As conventional examples of this kind, there are those described in Patent Documents 1 and 2.
Japanese Patent Laid-Open No. 2000-28383 JP 2001-289705 A

  However, the conventional management method cannot secure sufficient safety against chemicals, powerful drugs, etc. that require attention in handling. For example, when the entire medicine bottle 2 is taken out without permission, no management information remains, so it is impossible to grasp the information. That is, it is not known at all whether the medicine bottle 2 has been stolen from the management shelf 1 or someone has taken it out temporarily.

  In addition, the medicine bin 2 stored in the management shelf 1 is usually pre-determined in place. However, if the person who came to pick up the medicine mistakes the place to return the medicine bottle 2, the medicine bottle 2 It will be difficult to understand where in the management shelf 1 is. In this case, a situation may occur in which the necessary medicine bottle 2 is not found in a hurry. When a certain number of types of medicine bottles 2 are stored in a designated place on the management shelf 1, if there are no designated medicine bottles 2 in the designated place, they came to pick up the medicine. Confused.

In order to solve the above problems, the RFID tag of the present invention includes a sensor that detects a change in physical quantity of a management target as a change in electrical quantity, and a processing unit that specifies the physical quantity of the management target from a detection value of the sensor. And an antenna for transmitting the physical quantity of the management object specified by the processing unit, and the processing unit changes the value of the electric quantity stepwise according to the question from the interrogator. And the physical quantity is specified based on the quantity of electricity when the value of the quantity of electricity matches or exceeds the detected value .

The physical quantity is a weight of e.g. managed objects, the sensor is Ri weight sensor der to detect for example the pressure that varies depending on the weight of the managed object as an electric quantity, the processing unit, from the interrogator In response to the question, the weight of the management object, the change in the weight, or the management object was lifted in comparison with the detection value of the weight sensor while changing the value of the electricity in stages. Is detected .

  Further, the non-contact data carrier system includes an RFID tag, a questioning means for exchanging information wirelessly between the RFID tag, a management information exchange and power supply between the RFID tag via the questioning means. A non-contact data carrier system provided with management means for supplying the above-mentioned RFID tag as the RFID tag used in the non-contact data carrier system.

  In the RFID tag, the processing unit specifies the weight of the management object from the detection value of the weight sensor and transmits the information such as the weight with an antenna. Therefore, the processing unit is stored in a bin or the like to which the RFID tag is attached. The stock quantity can be detected as a change in weight or the like without contact.

  In the non-contact data carrier system, since the RFID tag is used, a physical quantity such as an inventory quantity stored in a bin or the like to which the RFID tag is attached can be managed by a change in weight or the like.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings.

  The weight of chemicals etc. in the bottle changes according to the amount of use. Workpieces such as parts in factories, and stock items such as books and boxed products at dealers vary in weight depending on the number of stocks. For example, store displays such as merchandise, books, and souvenirs change in weight depending on the number. In a warehouse or the like in which a large number of inventory items are placed on a plurality of shelves, the weight changes according to the number of inventory items placed on each shelf board. For this reason, in various industries such as the pharmaceutical industry, hospitals, dangerous goods stores, general stores, luxury goods stores, manufacturing factories, storage warehouses, etc., inventory is managed by grasping changes in the number of inventory items as changes in weight. can do. The present invention provides an RFID tag and a non-contact data carrier system suitable for inventory management of management objects (chemicals, works, products, books, souvenirs, etc.) in such a manner. This system manages a collection of tablets, bins, books and products stacked on a shelf.

  For this reason, the present invention integrates an RFID having an analog signal sensing function by combining a weight sensor, and performs the above-described management using an RFID that can collect data without battery and without contact. . As a result, when the quantity is an important parameter such as the quantity of inventory, the quantity is not counted, but the quantity is calculated from the total weight and inventory management is performed. Hereinafter, specific embodiments of the present invention will be described.

[First embodiment]
The first embodiment of the present invention will be described below. In this embodiment, a non-contact data carrier system for drug management will be described. Here, a collection of tablets in a bottle is a management object.

  As shown in FIG. 1, the non-contact data carrier system 10 for medicine management is composed of an RFID tag 11, an interrogator 12, and a management personal computer 13.

  The RFID tag 11 is a tag for measuring the weight of the medicine bottle 15 and managing the amount of medicine stored therein by weight. As shown in FIGS. 4 to 7, the RFID tag 11 includes a weight sensor 16, a processing unit 17, and an antenna 18.

  The weight sensor 16 is a sensor for detecting, as an electric quantity, a pressure that changes in accordance with the weight of the medicine bottle 15 (a medicine bottle as a storage support means that stores a medicine to be managed). As shown in FIGS. 4 and 5, the weight sensor 16 is attached to the bottom surface of the medicine bottle 15. A specific configuration of the weight sensor 16 is shown in FIG. In this example, the weight sensor 16 is disposed on the bottom surface of the medicine bottle 15, and the processing unit 17 and the antenna 18 are disposed on the side surface of the medicine bottle 15. There are various shapes of the medicine bottle 15 (see FIG. 1), and FIG. 6 shows the medicine bottle 15 having a shape different from those in FIGS.

  The weight sensor 16 includes a sensor fixing plate 20, a spring material 21, a sensor plate base 22, and a weight sensor material 23. The sensor fixing plate 20 is a member for fixing the weight sensor 16 to the bottom surface of the medicine bottle 15. The spring material 21 is a member for elastically supporting the sensor plate base 22 directly and indirectly the weight sensor material 23 with respect to the medicine bottle 15. The spring material 21 is made of a material such as a synthetic resin having spring properties. The sensor plate base 22 is a plate base that supports the weight sensor material 23. The sensor plate base 22 is elastically supported on the medicine bottle 15 side by the spring material 21. As a result, the spring material 21 absorbs the impact of the weight sensor material 23 coming into contact with the shelf board portion 39 when the medicine bottle 15 is placed on the shelf board portion 39, and the pressure is dispersed throughout the weight sensor material 23. Thus, the weight sensor material 23 is elastically supported.

  The weight sensor material 23 is a member for measuring the weight of the medicine bottle 15 as a change in pressure. There are several types of weight sensor material 23, but a sheet-like pressure-sensitive conductive rubber is used here. That is, the weight sensor material 23 changes in accordance with an analog change in weight that changes depending on the pressure that changes according to the weight of all the medicines in the medicine bottle 15 that is a management target, and a necessary amount of medicine is taken out. It is composed of a pressure-sensitive conductive rubber that detects pressure as a change in resistance value. This pressure-sensitive conductive rubber is a rubber having a property that the resistance value changes in accordance with a change in pressure. That is, the weight changes according to the amount of medicine inside the medicine bottle 15, and the resistance value changes according to the change in weight. When the pressure applied to the pressure-sensitive conductive rubber is changed in an analog manner, the internal resistance value is changed in an analog manner. For this reason, when the chemical bottle 15 is placed on the pressure-sensitive conductive rubber and any number of chemicals in the chemical bottle 15 are taken out, the resistance value of the pressure-sensitive conductive rubber changes accordingly. The change in weight (amount of medicine inside the medicine bottle 15) can be specified from the change in resistance value. The weight sensor 16 utilizes this characteristic.

  The processing unit 17 is a processing unit for specifying the weight of the medicine bottle 15 that is a management object from the detection value of the weight sensor 16. The processing unit 17 is attached to the medicine bottle 15 in various modes. Specifically, as shown in FIG. 4, the weight sensor 16 is attached to the bottom surface of the medicine bottle 15 or attached to the side surface of the medicine bottle 15 as shown in FIG. The processing unit 17 includes an RFID transmission / reception unit 25, a nonvolatile memory 26, an analog interface unit 27, and a digital I / O 28.

  The RFID transceiver unit 25 includes a CPU, a wireless unit, and the like, and is a part that executes processing such as transmission / reception. The RFID transceiver unit 25 demodulates the radio signal captured by the antenna 18 into a digital signal, analyzes the digital signal, executes a process according to the obtained question from the interrogator 12, and forms a response signal. The response signal is modulated and returned from the antenna 18. The question signal from the interrogator 12 received here is the weight of the medicine bottle 15. Specific questions include the total weight of the medicine bottle 15, the amount of change in the weight, and the number of times that the weight becomes negative (value when the medicine bottle 15 is lifted). In the case of the total weight of the medicine bottle 15, the total weight of the medicine bottle 15 is recorded every time for the same medicine bottle 15 in the management PC 13, and the change is obtained by subtracting the current weight from the previous weight. Watch minutes.

  If the content of the question is a change in weight, the previous total weight recorded in the nonvolatile memory 26 is subtracted from the current total weight to calculate the weight change, and the value is transmitted.

  When the weight is negative (value when the medicine bottle 15 is lifted), the RFID transmitter / receiver 25 transmits the value every time the weight sensor 16 detects a negative value, and which medicine bottle See if 15 has been lifted by the hand and how many times it has been lifted. It should be noted that not only when the weight becomes negative, but also a state in which transmission / reception becomes impossible by lifting may be detected.

  The RFID transmitter / receiver 25 is a power supply unit (not shown) having a function of obtaining power necessary for the operation of the RFID transmitter / receiver 25 and the nonvolatile memory 26 from the radio signal captured by the antenna 18. And is supplied to each unit as an operating power source.

  The non-volatile memory 26 is composed of, for example, an EEPROM or an FeRAM, and stores data such as an ID assigned to its own medicine bottle 15 and a program executed by the RFID transceiver unit 25. In addition, necessary numerical values are recorded in accordance with the instructions of the RFID transceiver unit 25 according to the contents of the above questions (the total weight of the medicine bottle 15, the amount of change in the weight, the number of times the weight has become negative, etc.). Yes. Also, management information may be recorded. This management information includes when and who took out how much medicine.

  The analog interface unit 27 includes, for example, a comparator circuit or an A / D converter circuit, and converts an analog change in the resistance value of the weight sensor 16 into a digital quantity. The processing unit 17 and the weight sensor material 23 of the weight sensor 16 are connected by a sensor connection line 29. An example of the analog interface unit 27 is shown in FIG. The analog interface unit 27 mainly includes a comparator 31 and a resistor 32 and is connected to the weight sensor 16. Then, a current is passed through the weight sensor 16 from the analog interface unit 27 side through the resistor 32, and the voltage generated at both ends of the weight sensor material 23 is measured by the comparator 31. Specifically, based on an instruction from the RFID transceiver unit 25, the comparator 31 compares the value of the threshold value Vref with the input voltage Vin while changing it stepwise. If the comparator 31 outputs 1 when the input voltage Vin is larger than the threshold value Vref, when the threshold value Vref is increased, the output is switched from 1 to 0, and the threshold value Vref is changed. When the value is decreased, the switching of the output 0 → 1 is detected by the RFID transceiver unit 25, and the voltage generated at both ends of the weight sensor material 23 is determined based on the value of the threshold value Vref at that time. With such a configuration, the analog interface unit 27 can be driven with extremely low power, and the weight sensor 16 using only the power obtained from the radio signal captured by the antenna 18 can be measured.

  At this time, if the weight of the medicine bottle 15 changes, the resistance value changes and the voltage changes. For this reason, the resistance value of the weight sensor material 23 is obtained from the change in voltage, and converted to weight. This is expressed as follows.

Vin = (Vdd / (r1 + R)) × R
Therefore, R is R = (r1 × Vin) / (Vdd−Vin)
Thus, the resistance value is obtained.

  As a result, the weight is obtained from the value previously converted by the resistance value versus the weight.

  As a mode of conversion of resistance value to weight, the weight in the state where there is no medicine in the medicine bottle 15 is set to zero. That is, the combined weight of the empty medicine bottle 15 itself and the RFID tag 11 (the weight sensor 16, the processing unit 17, and the antenna 18) is set to zero. For this reason, when the medicine bottle 15 is lifted, a negative value is obtained. Thereby, when the medicine is put in the medicine bottle 15 and placed on the shelf, the weight of the medicine can be detected.

  In addition, as a mode of the above-mentioned 0 setting, in addition to the case where the weight in the state where there is no medicine in the medicine bottle 15 is set to 0 and the change in voltage due to the weight of the medicine itself is detected, You may detect the change of the voltage by the weight of the tag 11 and the whole chemical | medical agent. Also, without making these settings, the weight change may be detected by subtracting the current weight from the previous weight.

  The digital I / O 28 is an element for connecting to an external expansion element. Here, an identification lamp (not shown) is connected to the digital I / O 28. An LED or the like is used as the identification lamp. When an ID specifying a desired medicine bottle 15 and an identification lamp lighting command are transmitted from the management personal computer 13, the RFID transceiver unit 25 of the medicine bottle 15 to which the ID is assigned sends the identification lamp lighting command and power supply. In response, the identification lamp is turned on via the digital I / O 28 so that the desired medicine bottle 15 can be quickly identified.

  The antenna 18 is attached to the medicine bottle 15 in various manners. Specifically, as shown in FIG. 4, the weight sensor 16 is attached to the bottom surface of the medicine bottle 15 or attached to the side surface of the medicine bottle 15 as shown in FIG. The antenna 18 is a transmission / reception shared antenna, receives the question information from the interrogator 12, and transmits a response to the question. Further, it has a function of receiving power supply from the interrogator 12.

  The interrogator 12 is a question means for exchanging information wirelessly with the RFID tag 11. The interrogator 12 includes an R / W 35, an antenna switch 36, an antenna 37, and a management shelf 38. The R / W 35 is a device for performing information writing processing and reading processing on the medicine bottle 15. The antenna switch 36 is a switch for switching to the antenna 37 at a position where the medicine bottle 15 to be measured is located among the plurality of antennas 37. The antenna 37 is an antenna for exchanging information and power with the antenna 37 attached to the medicine bottle 15. The antenna 37 is affixed to a shelf 39 of a management shelf 38, which will be described later. The antenna 37 is affixed to the shelf 39 in a configuration that allows the most efficient transmission / reception and power supply in relation to the antenna 18 on the side of the medicine bottle 15 placed thereon.

  The management shelf 38 is a shelf for storing and managing the medicine bottle 15. The management shelf 38 is composed of a plurality of shelf boards 39. The shelf 39 is set to have a number and size corresponding to the number and size of the medicine bottles 15 to be stored, and is arranged at a height corresponding to the height of the medicine bottle 15. Here, a three-stage management shelf 38 is configured with three shelf boards 39.

  The management PC 13 is management means for exchanging management information and supplying power to the RFID tag 11 via the interrogator 12. The management personal computer 13 activates the interrogator 12, controls communication and power supply between the interrogator 12 and the RFID tag 11, and stores and manages information on each medicine bottle 15.

  Next, the operation of the above-described contactless data carrier system for drug management will be described.

  The interrogator 12 is controlled by the management personal computer 13, and a signal for periodically inquiring the weight is transmitted to the RFID tag 11 of each medicine bottle 15. Specifically, the R / W 35 is operated, the antenna switch 36 is used to switch to the antenna 37 with the medicine bin 15 to be inquired, and the medicine bin 15 in the management shelf 38 is transmitted by accessing it.

  In the medicine bottle 15, the antenna 18 of the RFID tag 11 receives electric power from the antenna 37 on the interrogator 12 side, and receives a signal asking the weight of the medicine bottle 15 as the question content. Next, the RFID transceiver unit 25 measures the voltage of the weight sensor 16 and converts it to a weight, and transmits the weight information to the interrogator 12. At this time, the weight of the medicine bottle 15 (the total weight of the medicine bottle 15, the change in weight, the number of times the weight becomes negative) may be constantly measured and recorded in the nonvolatile memory 26. The recording information in the nonvolatile memory 26 is transmitted. Note that the electric power may be constantly supplied or may be supplied periodically. When constantly monitoring, such as when monitoring the number of times the weight has become negative, power is always supplied.

  Information such as weight obtained in this way is managed by the management personal computer 13.

  This monitoring is periodically performed for all the medicine bottles 15, and the state of each medicine bottle 15 is recorded in the management personal computer 13. When taking out the medicine from the medicine bottle 15, the medicine bottle 15 is taken out from the management shelf 38, so the weight of the medicine bottle 15 becomes negative and out of communication range. You may make it do.

  And when the weight of the medicine bottle 15 is changing, the validity is verified immediately. At this time, if the amount of change in the weight of the medicine bottle 15 exceeds a predetermined value, it means that the medicine has been taken out more than necessary, and it is determined that there is an abnormality, and the management personal computer 13 issues a warning or the like. This prevents misuse, abuse, theft, etc. of chemicals.

  When two or more medicine bottles 15 are simultaneously transmitted with a negative signal (a signal indicating that the medicine bottles 15 are lifted), the two or more medicine bottles 15 are lifted at the same time, which may cause theft. Therefore, it is determined that there is an abnormality, and the management PC 13 issues a warning or the like. This prevents chemical theft and the like.

  In addition, when a large number of medicine bottles 15 are stored in the management shelf 38, it may not be known where the desired medicine bottle 15 is. In this case, the ID of the medicine bottle 15 is input to the management personal computer 13. The management personal computer 13 supplies power to a desired medicine bottle 15 based on this ID, and transmits an identification lamp lighting command. As a result, the RFID transceiver unit 25 of the medicine bottle 15 to which the ID is assigned receives the identification lamp lighting command and power supply, and lights the identification lamp via the digital I / O 28. Accordingly, the target medicine bottle 15 is searched from the plurality of medicine bottles 15 stored in the management shelf 38 using the identification lamp as a mark. Thereby, the desired medicine bottle 15 can be quickly identified.

  Thus, the position of the medicine bottle 15 and the weight of the medicine bottle 15 (the number of medicines inside) are updated and recorded.

  As described above, by constantly monitoring the weight of the medicine bottle 15 for medicine, powerful medicine, or the like that requires handling, medicine misuse, abuse, theft, or the like can be reliably prevented. In other words, it is possible to immediately determine whether or not a predetermined person has taken out a predetermined amount, and when it is not appropriate, there is an effect that an immediate response is possible. Since it can be judged immediately, it is also effective in preventing misuse.

  In addition, since the antennas 18 and 37 supply electric power using electromagnetic energy, the weight sensor 16 can be connected without a battery. This eliminates the need for battery replacement and can be used even in a completely sealed state. In addition, maintenance such as battery replacement is not required, and running costs such as battery costs are not required.

  Since the chemical bottle 15 includes the weight sensor 16 and the processing unit 17, there is an effect that the portability is not impaired wirelessly.

  Since the weight sensor 16 measures the weight of the medicine bottle 15 and manages the number of medicines inside, the medicine bottle 15 having any shape can be managed regardless of the shape of the medicine bottle 15.

  Since the medicine bottles 15 in the management shelf 38 can be monitored at all times, the latest information on the inventory and its quantity can always be obtained.

  Since the processing unit 17 includes the nonvolatile memory 26, management information can be easily stored, precautions for use can be stored, and misuse can be prevented.

  Further, since the medicine bottle 15 is wirelessly managed, it is only necessary to place it in the detection area of the antenna, and there is an effect that it is not necessary to determine a strict storage position.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. Since the configuration of the non-contact data carrier system of this embodiment is substantially the same as that of the above-described non-contact data carrier system of the first embodiment, the same members are denoted by the same reference numerals and description thereof is omitted here.

  In the present embodiment, the communication area is expanded. In order to expand the communication area of the RFID tag 11 of the medicine bottle 15, an induction antenna is added to the medicine bottle 15. Specifically, there are an example in which the induction antenna 41 is arranged on the side surface of the medicine bottle 15 as shown in FIG. 9, and an example in which the induction antenna 41 is arranged on the upper surface of the medicine bottle 15 such as a lid as shown in FIG. is there.

  Further, as shown in FIGS. 11 and 12, a relay type induction antenna 42 arranged on the side surface of the medicine bottle 15 and an induction antenna 44 fixed to the sensor fixing plate 20 connected by a connection line 43 between induction antennas are provided. Yes. An antenna is also disposed on the bottom surface of the medicine bottle 15 as necessary. In addition, the larger the induction antenna, the better and contributes to area expansion.

  The antenna 37 on the interrogator 12 side is also appropriately attached to the upper side surface and the lower side surface of the shelf part 39 of the management shelf 38, the side wall of the management shelf 38, the back wall, and the like as necessary. It may be attached to the ceiling of the management room.

  Thereby, the electromagnetic wave from the antenna 18 is received by the induction antenna 41 or the like and re-radiated to the RFID tag 11 to expand the communication area.

  With this configuration, the same operation and effect as in the first embodiment can be obtained, and the communication area can be expanded so that communication with the interrogator 12 is possible regardless of where the medicine bottle 15 is placed in the management room. The medicine bottle 15 can be grasped in a wide range.

  Although the antenna 18 of the RFID tag 11 is limited by the size of the medicine bottle 15, the communication area can be expanded by providing an induction antenna.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. Since the configuration of the non-contact data carrier system of this embodiment is substantially the same as that of the above-described non-contact data carrier system of the first embodiment, the same members are denoted by the same reference numerals and description thereof is omitted here.

  As shown in FIGS. 13 and 14, the present embodiment includes an LED display 46 as an identification lamp and a switch 47 thereof. The switch 47 is a switch used for an application such as an acknowledgment response. When the LED indicator 46 of the medicine bottle 15 selected by the management personal computer 13 is lit, the switch 47 is pressed for a confirmation response or the like, and a confirmation signal is transmitted to the management personal computer 13. Moreover, it can also be used as a switch for setting the display pattern of the LED display 46. That is, the display pattern such as lighting, blinking, and extinguishing may be changed by pressing the switch 47.

  The LED indicator 46 and the switch 47 are provided on the label 48 (the processing unit 17) on the side surface of the medicine bottle 15, respectively. Further, these are connected to the digital I / O 28, respectively.

  When a desired medicine bottle 15 is selected from the management personal computer 13, the LED indicator 46 of the medicine bottle 15 blinks. Thereby, it is possible to easily search where the necessary medicine bottles 15 are located on the management shelf, and there is an effect that the search man-hours and time can be reduced. Thereby, it is not necessary to strictly manage the storage location of the medicine bottle 15.

  Further, since the switch 47 for response is provided, a reliable instruction can be given.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described. Since the configuration of the non-contact data carrier system of this embodiment is substantially the same as that of the above-described non-contact data carrier system of the first embodiment, the same members are denoted by the same reference numerals and description thereof is omitted here.

  As shown in FIG. 15, the present embodiment is an example in which a non-contact data carrier system is used for inventory management of a stacked product on a display stand.

  In the non-contact data carrier system of this embodiment, as shown in FIG. 15, a plate-like RFID tag 52 is placed on a display stand 51, and a product 53 is placed on the RFID tag 52. Examples of the product 53 include books and souvenirs. The product 53 may be a material, a part, or the like as long as it can be stacked on the RFID tag 52.

  The weight of each product to be loaded is measured in advance, and from the measured total weight, how many are loaded is calculated and managed.

  Further, the RFID tag 52 is provided with an LED display 54. The LED indicator 54 is lit when selected from the management personal computer 13 and is lit when the product 53 is below a set value. As a result, when the amount of the merchandise 53 stacked becomes equal to or less than the set value, the management personal computer 13 is notified and the LED display 54 is turned on to notify the decrease in the merchandise 53.

  As a result, the number of products 53 that are stacked, such as souvenirs, can be easily and always managed by the weighing scale.

  In addition, by turning on the LED display 54, it is possible to easily recognize the product 53 whose inventory amount has decreased. That is, it is possible to accurately grasp the inventory location, the exhibition location, and the like.

  Further, the number of times the product 53 is held in the hand can be confirmed by counting a signal indicating no weight when the product 53 is held in the hand (weight is minus). For this reason, when the product 53 is an exhibit or the like, information such as the degree of appreciation of the product can be collected according to the number of times.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described. Since the configuration of the non-contact data carrier system of this embodiment is substantially the same as that of the above-described non-contact data carrier system of the first embodiment, the same members are denoted by the same reference numerals and description thereof is omitted here.

  In the present embodiment, as shown in FIG. 16, a non-contact data carrier system is used for a product management shelf. Here, the inventory is managed by the weight of the product 56 and the temperature of the product 56 is also managed. Specifically, the products 56 are stored side by side on a plate-like RFID tag 57. Further, a temperature sensor 58 and an LED display 59 are attached to the RFID tag 57. The temperature sensor 58 includes a heat-sensitive resistor that changes in accordance with a change in the temperature of the product 56 that is a management target. The LED indicator 59 notifies the management personal computer 13 and turns on the LED indicator 59 when the temperature detected by the temperature sensor 58 exceeds the set value or does not reach the set value.

  The set temperature may be different for each RFID tag 57 or may be the same. By setting the temperature of each RFID tag 57 on the management personal computer 13, different temperatures can be managed for each RFID tag 57.

  As a result, the above-described effects can be achieved, and the temperature of the plurality of products 56 can be easily managed without requiring large facilities such as individual temperature control rooms.

[Modification]
In each of the above-described embodiments, it has been described that it relates to management of medicines / drugs / dangerous goods, shelf management, sales management, etc. It can be used for management and inventory management.

  In addition, use the contactless data carrier system of the present invention for video rental, CD rental exhibition product management, factory shelf management, inventory management, material management, measuring instrument management, inventory quantity management, parts management, bookshelf, warehouse, etc. Can do.

  It can also be used for product expiration dates, hospital charts, and individual temperature management. The management object can be managed in various modes such as LED display of inventory position, picking completion confirmation report, inventory quantity management by sensor, individual temperature management by sensor, and picking quantity display of inventory products.

  Further, as the weight sensor material 23 of the weight sensor 16, a spring may be used in addition to rubber. That is, although the example of the pressure-sensitive conductive rubber has been described as the weight sensor 16, if there is an element whose resistance value changes by weight or an element whose voltage changes, it can be used. For example, a variable resistor may be attached to the spring, assuming that the resistance changes with weight.

It is a block diagram which shows the whole structure of the non-contact data carrier system which concerns on the 1st Embodiment of this invention. It is a schematic diagram which shows the example of the conventional chemical | medical agent management. It is a schematic diagram which shows the example of the conventional chemical | medical agent management. It is a figure which shows the example of attachment of the RFID tag to the bottom face of the chemical | medical agent bottle which concerns on the 1st Embodiment of this invention. It is a figure which shows the example of attachment of the RFID tag to the side surface of the chemical | medical agent bottle which concerns on the 1st Embodiment of this invention. It is a side view which shows the weight sensor which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the RFID tag of the weight sensor which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the analog interface part of the weight sensor which concerns on the 1st Embodiment of this invention. It is a figure which shows the chemical | medical agent bottle which concerns on the 2nd Embodiment of this invention. It is a figure which shows the chemical | medical agent bottle which concerns on the 2nd Embodiment of this invention. It is a figure which shows the chemical | medical agent bottle which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the relay type induction antenna which concerns on the 2nd Embodiment of this invention. It is a side view which shows the structure of the chemical | medical agent bottle which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the RFID tag which concerns on the 3rd Embodiment of this invention. It is a perspective view which shows the whole structure of the non-contact data carrier system which concerns on the 4th Embodiment of this invention. It is a perspective view which shows the whole structure of the non-contact data carrier system which concerns on the 5th Embodiment of this invention.

Explanation of symbols

10: Non-contact data carrier system, 11: RFID tag, 12: Interrogator, 13: Management personal computer, 15: Chemical bottle, 16: Weight sensor, 17: Processing unit, 18: Antenna, 20: Sensor fixing plate, 21: Spring material, 22: sensor board base, 23: weight sensor material, 39: shelf board part, 25: RFID transmission / reception part, 26: nonvolatile memory, 27: analog interface part, 28: digital I / O, 29: sensor Connection line, 31: comparator, 32: resistance, 35: R / W, 36: antenna switch, 37: antenna, 38: management shelf, 39: shelf board part.

Claims (13)

A sensor that detects a change in the physical quantity of the managed object as a change in the quantity of electricity;
A processing unit for identifying the physical quantity of the management target object from the detection value of the sensor;
An antenna for transmitting the physical quantity of the management target specified by the processing unit,
In response to a question from the interrogator, the processing unit compares the value of the electric quantity with the detected value while changing the electric quantity stepwise, and when the electric quantity value matches or exceeds the detected value, An RFID tag characterized by specifying the physical quantity based on the quantity . The RFID tag according to claim 1, wherein
A weight of the physical quantity is managed object, Ri weight sensor der to detect the pressure which the sensor changes according to the weight of the managed object as an electric quantity, the processing unit, the question from the interrogator In response, the value of the electric quantity is changed step by step and compared with the detection value of the weight sensor to detect the weight of the management object, the change in the weight, or the management object being lifted. RFID tag which is characterized in that. In the RFID tag according to claim 1 or 2,
The RFID tag, wherein the processing unit is supplied with power from outside via the antenna. In the RFID tag according to any one of claims 1 to 3,
The RFID tag according to claim 1, wherein the management target is a collection of tablets, bins, books or products stacked on a shelf. The RFID tag according to claim 1, wherein
An RFID tag characterized in that the sensor is provided with a heat-sensitive resistor that changes in accordance with a change in temperature of the management object. In the RFID tag according to claim 2 ,
The RFID tag, wherein the weight sensor includes a pressure-sensitive conductive rubber that detects a pressure that changes in accordance with an analog change in the weight of the management object as a change in resistance value. The RFID tag according to any one of claims 2 to 4,
The RFID tag, wherein the processing unit specifies the total weight of the management object or a change in weight. The RFID tag according to any one of claims 2 to 4,
The processing unit measures the total weight of the management target consisting of an assembly of a plurality of solids, and calculates the number of solids from the total weight and the weight per solid. RFID tag. The RFID tag according to any one of claims 1 to 8,
An RFID tag, wherein the processing unit comprises a digital I / O for connecting a visual display means for individual identification. Storage support means for storing or supporting the management object, RFID tag attached to the storage support means, question means for wirelessly exchanging information between the RFID tags, and the above via the question means A non-contact data carrier system comprising management means for exchanging management information with a RFID tag and supplying power,
A non-contact data carrier system comprising the RFID tag according to any one of claims 1 to 9 as the RFID tag. The contactless data carrier system according to claim 10,
The contactless data carrier system, wherein the management means determines that an abnormality occurs when a signal with a change amount of the management target exceeding a set value is transmitted from the RFID tag. The contactless data carrier system according to claim 10 or 11,
The contactless data carrier system, wherein the management means determines that an abnormality occurs when signals are simultaneously transmitted from a plurality of RFID tags. The contactless data carrier system according to any one of claims 10 to 12,
The non-contact data carrier system, wherein the management means counts a weightless signal generated when lifting the storage support means.

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