JP4973022B2 - Non-contact type data carrier device and sensor system using non-contact type data carrier device - Google Patents

Description

  The present invention relates to an active non-contact data carrier device equipped with a sensor unit. More specifically, the present invention relates to an IC tag, an RFID, an IC tag system, an RFID system, a sensor network, and the like.

In recent years, IC cards are becoming increasingly popular in terms of information confidentiality, and in recent years, contactless IC cards that exchange information without contacting a reader / writer have been proposed. A system in which signal exchange with an apparatus or signal exchange and power supply is performed by electromagnetic waves is being put into practical use.
Under such circumstances, various types of non-contact IC tags in the form of sheets or bills, in which an IC chip carrying data is connected to an antenna coil, have recently been proposed and attached to products, packaging boxes, etc. for shoplifting. It has come to be used for prevention, logistics system, product management, etc.
Of course, a simple resonance tag having no IC is also used to detect the presence of an article.

In recent years, an IC tag with a sensor, in particular, an IC tag with a small sensor has come to be used as a small and lightweight measuring unit for measuring by a sensor.
In the case of the IC tag with the first sensor that performs only the transmission operation for transmitting the measurement data by the sensor without mounting the memory for storing the measurement data by the sensor, the memory for storing the measurement data by the sensor is mounted. In the case of the second sensor-equipped IC tag that performs only the transmission operation for transmitting measurement data, if the receiver is within the communication distance, data can be transmitted to the host side in real time, but the receiver is within the communication distance. If it is not, you cannot view the sensor measurement data.
Since it is only transmission, it is impossible to receive a data retransmission request, an in-memory clear request, or the like.
In the case of the third sensor-equipped IC tag equipped with a memory for storing sensor measurement data and equipped with a transmission / reception IC, the measurement data can be saved even if the receiver is not within the communication distance. Although it is possible, the active type that uses a battery and operates a circuit for data communication using this as a power source has a problem that the battery consumption is very fast because the current in the standby state is large. is there.
In the case of the fourth sensor-equipped IC tag that is equipped with a memory for storing sensor measurement data, uses a contact-type switch, and communicates data by the switch operation, the measurement data even if the receiver is not within the communication distance Can be saved, and data can be viewed later, and even if it is an active type, battery consumption during reception can be kept low, but because it uses a contact switch, it can not be housing The environment to use was limited.
JP 2000-227948 A

Thus, in recent years, IC tags with sensors, in particular, IC tags with small sensors have come to be used as small and lightweight measuring units that measure with sensors. In this case, it is indispensable to suppress current consumption in consideration of long-time use.
However, an active IC tag equipped with a small sensor unit has a problem that data can only be transmitted in real time without a memory in order to suppress current consumption.
Further, even when a memory is mounted and a transmission / reception IC chip (control unit) is used, in the case of a type that always waits for reception, the IC tag consumes standby current, which increases battery consumption. There is a problem.
The present invention corresponds to these. Specifically, in an active non-contact data carrier device equipped with a sensor unit, measurement data outside a normal management area over a long period of time can be obtained without increasing the capacity of the memory unit. In addition, it is an object of the present invention to provide a non-contact type data carrier device that can grasp the power consumption of the battery and further can reduce the battery consumption and can provide a housing that can be reduced in size.
At the same time, a sensor system using such a non-contact type data carrier device is to be provided.

A non-contact type data carrier device according to the present invention is an active non-contact type data carrier device equipped with a sensor unit, which transmits the sensor unit, a memory unit for storing data, and information of the memory unit. And a control unit that associates and controls each of the above-described units, and the control unit captures the measurement data in time series from the sensor unit, and for each measurement data captured from the sensor unit , Only the measurement data that takes a value outside the normal management area, as histogram data, is distributed for each data value area determined outside the normal management area, and the number of measurement data distributed for each data value area, is stored in the memory unit, Ru der those characterized by that it comprises a histogram display data generating section.
In the non-contact type data carrier apparatus, the width of the data value area is set to be larger than the area where the frequency of occurrence of the measurement data values is low. It is characterized by that.
The contactless data carrier device according to any one of the preceding claims, wherein the control unit transmits histogram data of the memory unit at a predetermined time interval by a transmission unit. It is what.
Further, in any one of the non-contact type data carrier devices, the sensor unit is a detection sensor that detects various states such as humidity, illuminance, and acceleration. Here, “capturing measurement data sequentially from the sensor unit in order” captures measurement data a plurality of times as time elapses, and usually captures measurement data at predetermined time intervals.

The sensor system using the non-contact type data carrier device of the present invention is a sensor system using an active non-contact type data carrier device, and is a non-contact data carrier device according to any one of claims 1 to 4. A contact-type data carrier device; and a receiving unit that receives data from a transmission unit of the non-contact type data carrier device, and the article is transported in a state where the non-contact type data carrier device is attached to the article. The histogram data stored and received from the transmission unit of the non-contact data carrier device attached to the article is received by the data reception unit.

(Function)
By adopting such a configuration, the non-contact type data carrier device of the present invention increases the capacity of the memory unit for measurement data outside the normal management area over a long period of time with an active IC tag equipped with a sensor unit. Therefore, it is possible to provide a non-contact type data carrier device that can be grasped without any restriction, can further suppress battery consumption, and can be a housing that can be reduced in size.
Specifically, the sensor unit, a memory unit for storing data, a transmission unit for transmitting information of the memory unit, and a control unit for controlling the respective units in association with each other, The measurement data is taken from the sensor part in time series, and only the measurement data that takes a value outside the normal management area for each measurement data taken from the sensor part is determined as histogram data and is determined outside the normal management area. This is achieved by providing a histogram display data creation unit that sorts the data into each value area and stores the number of measurement data sorted into each data value area in the memory unit .
Specifically, by providing the control unit, transmission can be performed only when desired, and power consumption can be reduced.
Further, in order to store the data as histogram data in the memory unit, the memory unit does not need to have a large capacity, and thus a memory unit having a small capacity and a small size can be used.
Even in a contactless data carrier device only for transmission, by transmitting histogram data at a predetermined constant interval, for example, a large memory is not required and the data length can be shortened. It is also possible to browse the data as histogram data.
Further, by transmitting the histogram data, the receiving side does not need to analyze the received data and can easily know the distribution of the measured value data.

The histogram display data creation unit distributes only the measurement data that takes a value outside the normal management range for each measurement data fetched from the sensor unit as histogram data for each determined data value area outside the normal management range. and, for each data value area, the number of measurement data sorted, more der Rukoto those stored in the memory unit, the non-contact type data carrier device, and more effectively, over time Measurement data outside the normal management area can be grasped without increasing the capacity of the memory unit, and further, battery consumption can be suppressed and a housing corresponding to miniaturization can be achieved.
Only measurement data that takes a value outside the normal management area is assigned as histogram data to each data value area determined outside the normal management area, and the number of measurement data assigned to each data value area is stored in the memory unit. Compared to the case where measurement data is also taken in the normal management area, the non-contact type data carrier device enables a housing that can be made smaller without increasing the memory capacity. In addition, the receiving side does not need to analyze the received data, and can easily know the distribution of measurement data that takes values outside the normal management range.
This is a case where importance is attached only to the case where there is measurement data outside the normal management range.There is a limit to the capacity of the memory part, and the histogram is used when the capacity of the memory part is smaller than the number of measurement data to be measured. This is effective when the number of all the data is fixed.
Further, as the data value area, the small area of incidence of the measured data values, the width is made larger than the larger occurrence frequency of the measurement data value area, the form of the invention of claim 2 Thus, a wide range of measurement data can be efficiently displayed in a histogram even with a small capacity of the memory unit.
Further, the transmitting unit, the histogram data of the memory unit, and transmits at predetermined time intervals, by the form of the invention of claim 3, thereby enabling desired low power consumption.
In particular, in the case of the form of the invention of claim 4 , wherein the sensor unit is a detection sensor that detects various states such as humidity, illuminance, and acceleration, it can be used widely and effectively.

  The sensor system using the non-contact type data carrier device of the present invention is configured as described above, so that the non-contact type data carrier device of the present invention is attached to the product when the product is transported and stored. Therefore, it is practically possible to accurately grasp the change in the state of the article in the sensor portion with a simple configuration.

As described above, the present invention is an active IC tag equipped with a sensor unit, and can measure measurement data outside a normal management area over a long period of time without increasing the capacity of the memory unit. This makes it possible to provide a non-contact type data carrier device that can reduce the size of the housing and make a housing that can be miniaturized.
At the same time, a sensor system using such a non-contact type data carrier device can be provided.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an example of an embodiment of a non-contact type data carrier device of the present invention and a sensor system using the same, and FIG. 2 is a histogram display of the non-contact type data carrier device shown in FIG. FIG. 3 is a schematic flow diagram showing a flow of data creation processing. FIG. 3 is a diagram for explaining the relationship between the measurement data value and the non-defective product rate and the measurement data classification of the histogram. FIG. FIG. 4B is a table showing a conventional histogram display, and FIG. 4B1 is a temperature in the section B1 to the section B8. FIG. 4C is a table showing the histogram display in the present invention, and FIG. 4C1 is a table showing the temperature ranges and frequencies of the sections C1 to C8.
In FIG. 2, S1 to S9 indicate processing steps.
1-4, 10 is a non-contact type data carrier device, 11 is a control unit, 11a is a histogram display data creation unit, 12 is a transmission unit, 13 is a sensor unit, 14 is a memory unit, 15 is a power supply unit, 20 Is a receiving unit, P1 and P2 are positions (also referred to as points) on the graph, F1 is a non-defective rate graph, and Rg is a normal management area.

First, an example of an embodiment of a contactless data carrier device of the present invention will be described with reference to FIG.
As shown in FIG. 1, the non-contact type data carrier device 10 of this example includes a sensor unit 13 including a temperature sensor, a memory unit 14 that stores data, and a transmission unit for transmitting information of the memory unit 14. 12 and a control unit 11 that controls each unit in association with each other. In particular, the control unit 11 captures measurement data from the sensor unit 13 in time series in order, As the histogram data, which is the data for displaying the histogram for each measurement data that has been taken in, the data is assigned to each determined data value area, and the number of measurement data assigned to each data value area is stored in the memory. A histogram display data creation unit 11a stored in the unit 14 is provided.
The determined data value area is also referred to as a data value section or simply a section.
The histogram display data creation unit 11a is formed in software in the control unit 11, and for each measurement data obtained from the sensor unit 13, only measurement data that takes a value outside the normal management range is used as normal histogram data. The data is allocated to each determined data value area outside the management area, and the number of measurement data allocated to each data value area is stored in the memory unit.
In this example, the histogram data is stored in the memory unit 14, but it is not necessary to increase the capacity of the memory unit 14, and the memory unit 14 having a small capacity and a small size can be used.
By providing the control unit, it is possible to transmit histogram data only at a predetermined time interval, for example, at a predetermined constant time interval, thereby reducing power consumption.
In this way, even a non-contact type data carrier device that only transmits data does not require a large memory, and the data length of histogram data to be transmitted can be shortened, so that past data can be viewed as histogram data. Is also possible.

Here, the power supply unit 15 includes a power supply for operation of the sensor unit 13 and the control unit 11 and a data transmission operation for performing data generation in the memory unit and data generation operation by the histogram data generation unit 11a according to instructions from the control unit 11. Used as a power source for each operation.
The control unit 11 is simply referred to as a microcomputer or a processor, and is composed of an IC chip. Here, the data in the memory unit 13 is transmitted through the transmission unit 12 under the control of the control unit 11. It is also called an IC chip for data communication.
The transmission unit 12 includes a transmission circuit, an antenna coil, and the like.
Here, the sensor unit 13 is a temperature sensor.
The memory unit 14 can be read and written in a nonvolatile manner, and here is composed of an IC memory separate from the control unit.
The control unit 11 takes in the temperature measurement data detected at a predetermined interval or at a predetermined time from the sensor unit 13, processes the acquired measurement data in the histogram display data creation unit 11 a, and records the histogram data in the memory unit 14. Then, the histogram data in the memory unit 14 is transmitted by the transmission unit 12 at a predetermined time or at the end of measurement.
When transmitting histogram data, the ID is also transmitted.

Here, based on FIG. 3, the relationship between the measurement data value and the non-defective product rate, the classification of the measurement data in the histogram, the normal management area and the outside of the normal management area will be briefly described.
The non-defective product rate graph F1 shown in FIG. 3 shows the relationship between the measurement data and the non-defective product rate, which can be obtained from actually performed data.
For example, when taking 8 categories of category 1 to category 8 like measurement data category 1, category 2 to category 7 have a high non-defective product rate (80% or more), and category 1 and category 8 have a non-defective product rate of 80. -10%.
And, from the aspect of non-defective product rate, it may be required to manage the measurement data in the range of Category 2 to Category 7.
In this way, when managing the measurement data in a predetermined section range with a high non-defective rate, the predetermined section range is referred to herein as a normal management area, and other than the predetermined section range is referred to as outside the normal management area, and on the histogram The part corresponding to the normal management area is also called a normal management zone.
In FIG. 3, in the measurement data classification 1, the points P1 and P2 are both in the classification 8, but the point P1 has a non-defective product rate of 75% and the point P2 has a non-defective product rate of 45%. The yield rate is very different.
For this reason, it is possible to further increase the divisions and make the points P1 and P2 different divisions. However, the number of divisions increases, and the amount of data increases for display as a histogram.
On the other hand, when 8 divisions of division A1 to division A8 are taken only outside the normal management area as in measurement data division 2, points P1 and P2 can be set as separate divisions and the number of divisions can be increased. That is, without increasing the amount of data, it is possible to reliably obtain only data having a high probability of being defective from the measurement data as data for displaying a histogram.
In the measurement data classification 2, the measurement data value of the non-defective product occurrence rate is 20% or less, and the non-defective product occurrence frequency is lower than that of the non-defective product occurrence frequency region. The section width is increased.
In addition, the area | region where a non-defective product rate is 20% or less is set to the division | segmentation A1 and the division | segmentation A8, and the division | segmentation width is made the same about the area | region where the non-defective product rate is larger than this.

For example, as shown in FIG. 4A, it is assumed that a measurement temperature is obtained at each measurement time.
In this case, when the entire temperature region including the normal management region where the temperature T ° C. is 2 <T ≦ 10 is divided into eight sections B1 to B8 as shown in FIG. 4B1, the histogram is shown in FIG. )become that way.
Here, only the temperature region outside the normal management region where the temperature T ° C. is 2 <T ≦ 10, as shown in FIG. 4 (c1), is divided into eight sections C1 to C8, the histogram is shown in FIG. c).
As described above, when the measurement data (see FIG. 4A) is displayed as a histogram only for the temperature region outside the normal management region, the frequency of the division generally decreases.
This is because it is intended to be a normal management area.
This means that the histogram display shown in FIG. 4C shows measurement data over a long time in the limited memory capacity of the memory unit 14 compared to the histogram display shown in FIG. 4B. Means you can.
Further, the histogram display shown in FIG. 4C means that the memory capacity of the memory unit 14 can be reduced as compared with the histogram display shown in FIG. 4B.

Next, based on FIG. 2, an example of a flow of processing for creating histogram display data of the non-contact type data carrier device of this example will be briefly described with reference to FIG. 1.
The histogram division outside the normal management area is determined in advance (S1), a memory area of a predetermined frequency (N) is secured in the memory unit 14 corresponding to each division, and the initial value of the frequency corresponding to each division Is set to 0. (S2)
The measurement is then started.
First, measurement data is taken from the sensor unit 13. (S3)
Next, it is determined whether or not the captured measurement data is in a predetermined category outside the normal management range (S4). If there is, the corresponding category is grasped for the measurement data (S5), and the memory unit It is determined whether the frequency data corresponding to the classification of 14 data has reached a predetermined frequency (N). (S6)
If the predetermined frequency (N) has not been reached, the data n of the corresponding frequency is rewritten and recorded as n + 1 for the corresponding section of the data in the memory unit 14 (S7), and the sensor unit After the measurement of 13 is finished, it is determined whether or not to transmit the histogram data. (S8)
If the predetermined frequency (N) has been reached, the process proceeds from process step S6 to process step S8.
In the processing step S8, when the measurement of the sensor unit 13 is finished and the histogram data is transmitted, the histogram data is transmitted (S9). Otherwise, the processing steps of S3 to S8 are repeated.
Here, in processing step S8, it is determined whether the measurement of the sensor unit 13 is completed and histogram data is transmitted, but the present invention is not limited to this.

A non-contact type data carrier device 10 with a non-contact type switch of this example is attached to an article, for example, from the non-contact type data carrier device 10 and the transmission unit 12 of the non-contact type data carrier device 10 shown in FIG. And a sensor system having a receiving unit 20 for receiving the data.
This sensor system conveys or stores the article with the non-contact type data carrier device 10 attached to the article, and the receiving unit 20 transmits the article 12 of the non-contact type data carrier device 10 attached to the article. The histogram data transmitted from is received, and the data obtained by the receiving unit 20 can be used to grasp the temperature change during transportation or storage.
The non-contact type data carrier device 10 with the non-contact type switch can be removed from the article thus transported and reused.

In addition, the said example is one example and this invention is not limited to these.
In addition, the contactless data carrier apparatus 10 of the present example shown in FIG. 1 may further include other functions, for example, a receiving unit for receiving data in addition to data transmission.
In this case, in the sensor system shown in FIG. 1, a transmission unit that performs transmission to the contactless data carrier device 10 is further provided on the reception unit 20 side.
The sensor unit 13 of this example is a temperature sensor, but instead of this, a form that is a detection sensor that detects various states such as humidity, illuminance, and acceleration can also be cited.

It is the schematic block diagram which showed one example of embodiment of the non-contact-type data carrier apparatus of this invention, and the sensor system using the same. FIG. 2 is a schematic flowchart showing a flow of processing for creating histogram display data of the non-contact type data carrier device shown in FIG. 1. It is a figure for demonstrating the relationship between the relationship between a measurement data value and a non-defective product rate, and the measurement data division of a histogram. FIG. 4 (a) is a table showing the measured temperatures corresponding to the measurement times when using the temperature sensor, FIG. 4 (b) is a diagram showing a conventional histogram display, and FIG. 4 (b1) is a section. FIG. 4C is a table showing the histogram display in the present invention, and FIG. 4C1 shows the temperature range and frequency of the sections C1 to C8. It is a table.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Non-contact-type data carrier apparatus 11 Control part 11a Histogram display data preparation part 12 Transmission part 13 Sensor part 14 Memory part 15 Power supply part 20 Reception part P1, P2 Position on a graph (it is also called a point)
F1 Yield rate graph Rg Normal management area

Claims (5)

An active non-contact type data carrier device equipped with a sensor unit, wherein the sensor unit, a memory unit for storing data, a transmission unit for transmitting information of the memory unit, and the respective units are associated with each other. A control unit that controls, and the control unit fetches measurement data from the sensor unit sequentially in time series, and for each measurement data fetched from the sensor unit , only measurement data that takes a value outside the normal management range Histogram display data generating unit that distributes the data as a histogram data for each data value area determined outside the normal management area, and stores the number of measurement data distributed for each data value area in the memory unit A non-contact type data carrier device comprising: The non-contact type data carrier device according to claim 1 , wherein the data value region has a width that is smaller than a region where the frequency of occurrence of measurement data values is high for a region where the frequency of occurrence of measurement data values is low. A non-contact type data carrier device characterized by being enlarged. 3. The contactless data carrier device according to claim 1 , wherein the control unit transmits the histogram data of the memory unit at a predetermined time interval by a transmission unit. A non-contact type data carrier device. 4. The non-contact type data carrier device according to claim 1 , wherein the sensor unit is a detection sensor that detects various states such as humidity, illuminance, and acceleration. Contact data carrier device. 5. A sensor system using an active non-contact type data carrier device, comprising: the non-contact type data carrier device according to claim 1; and a transmitter of the non-contact type data carrier device. A receiving unit that receives data from the device, transports or stores the article with the non-contact data carrier device attached to the article, and the non-contact attached to the article by the data receiving unit A sensor system using a non-contact data carrier device that receives histogram data transmitted from a transmission unit of the data carrier device.

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