JP2006059182A - Non-contact ic tag with sensor and method for guaranteeing environment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact IC tag with a sensor in which physical alteration of a measured result is made impossible or difficult without depending on a cipher or a keyword and its reuse is made possible, and a method for guaranteeing environments. <P>SOLUTION: A clock setting signal to be outputted from a control part 2 to a clock 11 is outputted through an electric line provided with a fuse 12 for electrically connecting the control part 2 and the clock 11. The fuse 12 is constituted so that a fuse cutting signal is outputted from the control part 2. Since the electric line is constituted between the control part 2 and the clock 11, the operation of the clock 11 can be disabled by outputting the fuse cutting signal to the fuse 12 after initializing the clock 11 to disconnect between the control part 2 and the clock 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a non-contact IC tag with a sensor for communicating information in a non-contact manner and an environmental security method using the non-contact IC tag with a sensor, and more particularly to a non-contact IC tag with a sensor and an environmental security method for preventing falsification of information. About.

  Conventionally, as an environmental security method during the transportation or storage of a package, a non-contact IC tag with a sensor is attached to the package, and changes in the environment of the package being transported or stored are stored in the IC and stored after the transportation or storage is completed. A method has been proposed for reading the contents and confirming that the environment during transportation or storage is within a preset tolerance.

As an example of such a sensorless non-contact IC tag, a temperature recording device is known (for example, refer to Patent Document 1). This temperature recording device has a function of driving a battery as a power source, measuring temperature at a constant time interval, storing the result in a semiconductor memory, and outputting recording data to the outside in response to an external read command. As a tamper-proof method, a method has been proposed in which external commands, write information, and internal information are encrypted, and keywords are set for device operations to increase the safety against unauthorized operations.
JP 2000-258254 A

  However, such encryption and keyword falsification prevention methods become ineffective if the “key” or “keyword” of the cipher is known to the person trying to falsify. In addition, there may be a method for preventing such a temperature recording device from being reset, but in this case, a new non-contact IC tag with a sensor is required for each transportation and storage, so that the environmental security cost is reduced. In addition to being expensive, there is a problem of increasing the environmental load because it is discarded each time.

  The present invention has been made in order to solve the above-described problems, and makes it impossible or difficult to tamper with the measurement result physically without using a code or a keyword, and it is possible to reuse the sensor. An object is to provide a contact IC tag and an environmental security method.

  In order to achieve the above object, a non-contact IC tag with a sensor according to the present invention detects an external environment, outputs a detection result thereof, a clock for outputting time data, and detection from at least the sensor. A memory capable of writing / reading a result and a time based on the clock; a control unit for writing / reading the detection result and the time to / from the memory; and a clock set signal input means for initializing the clock; A detection start signal input means for starting detection of an external environment and at least a battery as a power source for driving the clock, and the clock set signal input means cannot be operated after the clock is initialized. It is comprised so that it may become.

  Here, in this specification, “non-contact IC tag”, “time data”, “detection result”, and “detection start” mean the following or the following respectively.

  The “contactless IC tag” includes at least a memory, a control unit that writes / reads information to / from the memory, and an antenna for transmission / reception, and is configured to transmit information read from the memory via the antenna. Refers to a tagged tag.

  “Time data” refers to data associated with time data such as date, hour, minute and second, or time data such as a count number obtained by counting pulses of a predetermined frequency.

  The “detection result” is output from the sensor, for example, in the case of a temperature sensor, measurement data (measurement result) of the sensor such as temperature data, or measurement data such as a pass / fail judgment result calculated based on the measurement data. Secondary data based on this. In addition, the detection result includes the detection time when the detection data is obtained as necessary.

  “Detection start” is a content written when the non-contact IC tag is operated from the initial state or when information such as a detection result (measurement result) and a detection time (measurement time) is written in the memory. It means to operate after erasing and returning to the initial state. However, the time data is not initialized by the detection start signal, but is initialized by the clock set signal. The detection is performed at a set predetermined time interval.

  Note that “detection” simply means detection by a detector or the like, measurement by a measuring device or the like.

  Examples of the sensor used in the non-contact IC tag with sensor of the present invention include a temperature sensor (thermistor, semiconductor temperature sensor, etc.), a humidity sensor, an acceleration sensor, an optical sensor, etc., and these are one type or two or more types. Used in combination.

  The controller of the sensorless contactless IC tag of the present invention further writes / reads the detection start time to / from the memory. At this time, the control unit may write / read the detection result at the detection start time to / from the memory. The control unit writes / reads the detection result after the detection start time to / from the memory.

  The IC tag identification code is stored in advance in, for example, a read-only memory (ROM) constituting the control unit. The detection start time is used to check whether the stored contents of the memory are falsified by inputting the detection start signal again (reinitialization). When power is supplied from the battery to the memory, a volatile memory can be used as the memory. On the other hand, when power is not supplied from the battery to the memory, a nonvolatile memory is used as the memory.

  In the non-contact IC tag with sensor according to the present invention, the detection result in the control unit is written into the memory at least when the detection result is out of a preset environmental security range.

  Here, for example, when a temperature sensor is used as the sensor and the environmental security range is set to 0 ° C. or lower, when a temperature outside the environmental security range is obtained as a detection result, the detection time and the temperature at that time are Written in memory.

  As another method of writing the detection result to the memory, one or both of the maximum value and the minimum value of the sensor output is written to the memory as the detection result, and the sensor written to the memory at the end of detection (delivery of the package) There is also a method of reading out the maximum value and the minimum value of the output and determining whether the output is within the environmental security range.

  As a method of disabling the clock set signal input means, for example, when the clock set signal input means includes an antenna for receiving a clock set signal, the circuit set is externally interrupted during the circuit configuration. For example, a method of providing a fuse that can be blown.

  When the clock set signal input terminal is not provided with an antenna that receives the clock set signal and is exposed to the outside, and the clock set signal is input in contact with the terminal, for example, a resin mold is input after the clock set signal is input. In this case, the clock set signal input terminal is covered with an insulating coating, and when it is peeled off, it can be easily recognized that it has been peeled off. The method of disabling the clock set signal input means is not limited to these methods, and a method of sealing by a method other than resin molding is used so that it can be easily understood that the set signal input terminal is exposed. You can also.

  Furthermore, in the non-contact IC tag with a sensor according to the present invention, the detection start signal input means includes an antenna for receiving the detection start signal.

  Here, as the antenna for receiving the clock set signal of the clock set signal input means and the antenna for receiving the detection start signal of the detection start signal input means, the transmission / reception antenna provided in the non-contact IC tag is used. You may make it use together.

  The non-contact IC tag with sensor of the present invention is sandwiched between synthetic resin sheets and heated and pressed to integrate the whole, or resin molded to integrate the whole, for example, card-like, tape-like, button-like, It is formed into a coin shape or any other shape according to the shape of the luggage, and attachment means such as a string or an adhesive layer for mounting on the luggage is provided as necessary.

  As described above, according to the non-contact IC tag with sensor of the present invention, after the clock is initialized, the clock set signal input means is configured to be inoperable, so that the contents stored in the memory are altered. There is little possibility that Thereby, for example, when this non-contact IC tag with a sensor is attached to a luggage or the like, it is possible to reliably ensure the environmental conditions during transportation or storage of the luggage.

  In addition, since it has a detection start signal input means, the non-contact IC tag with sensor is collected after use, and after confirming the battery life and the function of the tag, it is attached to a new baggage again and the detection start signal is output again. Can be supplied and reused. As a result, the environmental security cost per time can be reduced, and the environmental load can be reduced because the cost is not discarded each time.

  In addition, an antenna that receives the detection start signal and transmits the detection result and detection time is provided, so that the detection start time of the non-contact IC tag with sensor and the detection data of the environment can be read without contact. Alternatively, environmental protection can be performed without hindering the storage process.

  In addition, since writing of the detection result in the memory by the control unit is performed at least when the detection result is out of the environmental security range, the capacity of the memory can be used effectively. Further, in the method of writing the maximum value and the minimum value of the sensor output in the memory, the memory necessary for storage is always constant and does not increase according to the number of detections, so that the memory can be used effectively.

  Next, according to the environmental protection method of the present invention, based on the input of the clock initialization signal, the transportation of the baggage on which the above-described non-contact IC tag with a sensor that has been initialized by the clock and disabled with respect to the clock is mounted or A method for ensuring an environment during storage, the detection start signal transmitting step for transmitting a detection start signal to the non-contact IC tag with sensor via an antenna of the non-contact IC tag with sensor, and the detection A writing step of writing a detection start time based on at least a detection result and a clock provided in the non-contact IC tag with a sensor into a memory based on a start signal, and a non-contact IC tag with a sensor via an antenna And a reading step of reading at least the detection start time and the detection result written in the memory.

  Further, according to the environmental security method of the present invention, the clock set signal input means includes an antenna for receiving the clock set signal, and ensures the environment during transportation or storage of the package equipped with the above-described non-contact IC tag with sensor. An initialization method for initializing a clock provided in the non-contact IC tag with sensor based on a clock set signal received via an antenna of the non-contact IC tag with sensor, which is an environmental security method; A clock operation preventing step for disabling operation on the initialized clock, and a detection start signal transmitting step for transmitting a detection start signal to the non-contact IC tag with sensor via an antenna of the non-contact IC tag with sensor And at least a detection result from a sensor provided in the non-contact IC tag with sensor and a clutch based on the detection start signal. A writing step for writing the detection start time based on the memory into the memory, and a reading step for reading at least the detection start time and the detection result written in the memory from the non-contact IC tag with sensor via an antenna. It is characterized by comprising.

  A specific method for transmitting / reading a signal via an antenna is realized by passing a package having a sensor-attached non-contact IC tag attached to a gate provided with the antenna. In the case of cargo transportation, this gate is used to read the contents written in the memory at the end point by a gate for transmitting a signal such as a detection start signal to the start point of the conveyor or vehicle passage for transporting the load. Each gate is installed. In the case of storage, if the entrance and exit of a storage warehouse etc. are different, a gate for transmitting a detection start signal is installed at the entrance, and a gate for reading the contents written in the memory is installed at the exit. However, when the entrance and the exit are common, the transmission of the detection start signal and the reading of the contents written in the memory are performed by the common gate.

  Another way to bring the antenna closer is to write a detection start signal by bringing the reader / writer closer to each package when accepting the package, and write the contents in the memory by bringing the reader / writer closer to each package when delivering the package. May be read out.

  According to the environment guarantee method of the present invention, since the clock cannot be operated after the clock is initialized, the content stored in the memory is less likely to be falsified. As a result, environmental conditions during transportation or storage of the luggage can be reliably ensured.

  Also, since it has a detection start signal transmission step, the sensor-free contactless IC tag is collected after use, and after confirming the battery life and the tag function, it is attached to a new baggage again and the transmission start signal is sent again. Can be supplied and reused. As a result, the environmental security cost per time can be reduced, and the environmental load can be reduced because the cost is not discarded each time.

  Furthermore, the detection start time of the non-contact IC tag with sensor and the detection data of the environment can be read in a non-contact manner, and environmental protection can be performed without hindering the transportation or storage process.

  According to the non-contact IC tag with sensor and the environmental security method of the present invention, it is possible to make it impossible or difficult to tamper with the measurement result physically without using encryption or keywords, and to enable reuse. .

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view transparently showing the configuration of the sensorless non-contact IC tag of this embodiment.

  The circuit part of the sensorless non-contact IC tag of this embodiment includes a temperature sensor 1 such as a thermistor having a predetermined temperature coefficient for measuring environmental temperature, a control part 2 for controlling each part, and a crystal as a pulse source. The clock 11 includes the vibrator 3, the measurement start time, the measurement time, and the memory 4 in which the measured temperature is written, the antenna 5, and the battery 6.

  Among these circuit portions, the antenna 5 and the wiring portion are directly patterned on an insulating substrate (not shown) by a well-known photolithography technique or a printing technique, and other passive / active elements and batteries are connected to these wiring portions. And electrically mounted on an insulating substrate. These wiring parts and mounting parts are covered with, for example, a synthetic resin film (not shown) and integrated by pressure heating.

  Next, the configuration of the non-contact IC tag with sensor will be described in detail with reference to FIG.

FIG. 2 shows a main block configuration of a sensor-free contactless IC tag chip.
Here, the control unit 2 is mainly composed of an arithmetic unit (CPU), a read-only memory (ROM), and a random access memory (RAM), and the CPU uses a program or data stored in the ROM or RAM. Various arithmetic processes are executed. The ROM stores an IC tag identification code when the tag is manufactured, and the IC tag identification code cannot be rewritten. The RAM stores an environmental security range that can be set as appropriate. Here, the environment guarantee range is a control temperature range that guarantees the environment with respect to the measurement result measured by the temperature sensor 1, and is set to 0 ° C. or less, for example. Here, when the measurement result measured by the temperature sensor 1 is out of this environmental security range, the measured temperature and measurement time are written in the memory 4. In addition, although the case where the temperature sensor 1 was used as a sensor was shown here, when using another sensor, the environmental security range corresponding to each sensor is set.

  The control unit 2 is electrically connected to the temperature sensor 1 via a sensor I / F (interface) 10. Further, the control unit 2 is electrically connected to a memory 11 and a clock 11 having a crystal resonator 3 as a pulse source.

  Here, as shown in FIG. 2, the clock set signal output from the control unit 2 to the clock 11 is output via an electrical line including a fuse 12 that electrically connects the control unit 2 and the clock 11. The The fuse 12 is configured to output a fuse cutting signal from the control unit 2. By configuring the electrical line between the control unit 2 and the clock 11 in this way, after the clock is initialized, a fuse cutting signal is output to the fuse 12 and the control unit 2 and the clock 11 are disconnected. Thus, the operation of the clock 11 can be disabled.

  Note that the method of disabling the clock set signal input means is not limited to the above-described method, and after initializing the clock directly from the outside using the clock set signal terminal 13 as shown in FIG. It is also possible to employ a method in which the clock set signal terminal 13 is sealed with the resin 14 to make it impossible to initialize the clock again.

  Next, with reference to FIGS. 2 and 4, the operation of the non-contact IC tag with sensor of this embodiment will be described. FIG. 4 shows a flowchart of the operation in the contactless IC tag with sensor.

  In this non-contact IC tag with sensor, before using the non-contact IC tag with sensor for the first time, for example, the control unit 2 outputs a clock set signal transmitted from the outside and received via the antenna 5 to the clock 11. . Then, the clock 11 is initialized based on the clock set signal (step S100).

  The initial setting of the clock 11 may be set to a predetermined time, or simply set a counter for counting clock pulses obtained from the crystal unit 3 to “0”. As shown in FIG. 3, when the clock is directly set from the outside using the clock set signal terminal 13, the initial setting is performed based on the clock set signal input from the clock set signal terminal 13. Is called.

  Subsequently, the control unit 2 outputs a fuse cutting signal to the fuse 12, blows the fuse 12, and disables the initial setting of the clock again (step S101). Further, as shown in FIG. 3, when the clock set signal input means is disabled, the clock set signal terminal 13 is sealed with the resin 14 in this step.

  Subsequently, prior to the transportation or storage of the package, a non-contact IC tag with a sensor is mounted on the package and maintained at a predetermined environmental temperature, and then a measurement start signal is input via the antenna 5 (step S102). ).

  When the control unit 2 determines that the measurement start signal has been received via the antenna 5, the control unit 2 initializes (deletes) information on the measurement result written in the memory 4, and stores the time of the clock 11 as the measurement start time. 4 is written (step S103). At this time, the ambient temperature may be measured by the temperature sensor 1 at the same time, and the measured temperature may be stored in the memory 4 as the ambient temperature at the start of the measurement. In FIG. 2, 9:05 on April 15, 2004 as the measurement start time and −10 ° C. as the environmental temperature at the start of measurement are recorded in the memory 4. Further, in order to measure the subsequent environmental temperature at a predetermined time interval, a measurement time interval (for example, 5 minutes) is set in a measurement timer (not shown), and an environmental security range for determining whether the measurement result is good or bad. A management temperature range (for example, 0 ° C. or lower) is set (step S103). The setting information of the measurement time interval and the management temperature range is received via the antenna 5 similarly to the measurement start signal.

  Here, when a non-contact IC tag with a sensor that outputs a fuse cutting signal to the fuse 12 as shown in FIG. 2 and disconnects between the control unit 2 and the clock 11 to disable the operation of the clock 11 is used. The steps S100 and S101 described above may be performed after the sensor-equipped non-contact IC tag is attached to the package and before the process of step S103, or at the same time. This is possible only at the start of use.

  Subsequently, the control unit 2 determines the elapse of the measurement time interval based on the information from the measurement timer (step S104), and measures the environmental temperature when the time elapses. On the other hand, when a read signal or a measurement end signal is received via the antenna 5, processing corresponding to each signal is performed (step S104).

  First, a case will be described in which the elapse of the measurement time interval is determined and the environmental temperature is measured when the measurement time interval elapses.

  When a predetermined measurement time interval elapses according to the measurement timer described above, the control unit 2 inputs a temperature measurement signal from the sensor 1 (step S105).

  Subsequently, based on the input temperature measurement signal, the control unit 2 determines whether or not the temperature exceeds the preset management temperature range (step S106).

  If it is determined in step S106 that it is normal (normal in step S106), the process returns to step S104.

  On the other hand, if it is determined in step S106 that there is an abnormality (abnormality in step S106), the control unit 2 writes the measurement time input from the clock 11 and the measured temperature in the memory 4. (Step S107). Here, when the abnormality is detected, writing to the memory 4 is performed at 4 ° C. at 15:30 on April 15, 2004 and at 5 ° C. at 15:35 on April 15, 2004, as shown in FIG. It is done as follows. And after the process of step S107, it returns to the process of step S104.

  If it is determined in step S106 that the measured temperature is normal within the control temperature range, the process returns to step S104 immediately without writing the measurement time and temperature to the memory 4. Therefore, the capacity of the memory 4 can be saved and the capacity can be used effectively.

  Next, a case where a read signal is received via the antenna 5 in step S104 will be described.

  When the read signal is received via the antenna 5, the control unit 2 reads the identification code of the IC tag from the ROM and the content of the measurement result (such as the measurement start time and the measurement temperature in the abnormal state) from the memory 4, and uses the information as the antenna. 5 (step S108). And after the process of step S108, it returns to the process of step S104.

  In this reading process, if the measured temperature exceeds the management temperature range, the IC tag identification code, the measurement start time and the temperature at that time, the time when the measurement temperature exceeds the management temperature range, and the measurement temperature are Read out. On the other hand, if the measured temperature does not exceed the control temperature range, there is no record of the abnormal state, the IC tag identification code, the measurement start time and the temperature at that time are read, and the package is kept within the control temperature range It will be confirmed that it was done.

  Next, a case where a measurement end signal is received via the antenna 5 in step S104 will be described.

  When the measurement end signal is received via the antenna 5, the control unit 2 stops the measurement timer and the temperature sensor 1, and sets the power consumption of the circuit to the lowest state to prevent the battery from being consumed (step S109).

  Remove the contactless IC tag with sensor from the package that has been stored or transported after the measurement is completed (after processing in step S109), check the function of the contactless IC tag, battery life, etc., and then attach it to a new package Then, again in the state of waiting for the measurement start signal (step S102), upon receiving the measurement start signal, the processing from step S103 is started again.

  Next, an environmental security method for transportation using the non-contact IC tag with sensor of the present invention will be described with reference to FIG.

  FIG. 5 is a diagram showing an outline of an environmental security method for transportation using the sensorless contactless IC tag 200. Table 1 shows an example of stored information in a control device (not shown) that manages the environmental security system when the package 201 is transported or stored using the non-contact IC tag with sensor 200.

  In this embodiment, after confirming that the battery life and function of the non-contact IC tag with sensor 200 are normal, the non-contact IC tag with sensor 200 is attached to the luggage 201. Then, after the environmental temperature where the luggage 201 is placed is set to a predetermined temperature (0 ° C. or lower), the measurement start signal is received through the receiving gate 203 provided with the antenna.

  The non-contact IC tag with sensor 200 that has received the measurement start signal sets the measurement time interval and the environmental security range, erases the memory, and measures the time when the measurement start signal is received and the ambient temperature at that time. And remember. Further, the non-contact IC tag with sensor 200 receives information such as an IC tag identification code, a measurement start time, and a measured environmental temperature at the measurement start time, and sends the information to the gate 203.

  The receiving gate 203 receives the information sent from the non-contact IC tag with sensor 200, stores it as verification data, and outputs the verification data to the delivery gate 204. The receiving gate 203 and the delivery gate 204 are electrically connected to a control device (not shown), and the control device manages information transmitted and received information in the acceptance gate 203 and the delivery gate 204. .

Table 1 shows an example of stored information created based on the information read from the contactless IC tag with sensor 200 by the receiving gate 203 and the information read from the contactless IC tag with sensor 200 by the delivery gate 204. The contents shown in (A) to (D) are summarized as follows.
(A) Same ID code, same measurement start time, no abnormal temperature record (B) Same ID code, same measurement start time, with abnormal temperature record (C) Same ID code, mismatched measurement start time, no abnormal temperature record (D ) ID code mismatch, same measurement start time, no abnormal temperature record

  In the case of (A), the package 201 is kept below the ambient temperature during transportation or storage, and the ID code (IC tag identification code) and the measurement start time are information read by the receiving gate 203 and the delivery gate 204. It is guaranteed that they are consistent and in a proper environment.

  In the case of (B), the ID code and the measurement start time coincide with the information read by the receiving gate 203 and the delivery gate 204, but the package 201 is kept below the ambient temperature during transportation or storage. There is no environmental security.

  In the case of (C), the package 201 is kept below the ambient temperature during transportation or storage, and the ID code matches the information read by the receiving gate 203 and the delivery gate 204, but the measurement start time is Disagreement. Therefore, the measurement start signal is input again, and the environment is not guaranteed.

  In this case, after rewriting the clock of the contactless IC tag with sensor 200 to the reception time of the package 201, the measurement start signal can be input to erase the contents of the memory 4, and the clock time can be restored to the current value again. However, in the present invention, since the operation of the clock is disabled after the fuse is blown or the setting terminal is molded to initialize the clock, the above-described falsification cannot be performed.

  In the case of (D), the luggage 201 is kept below the ambient temperature during transportation or storage, and the measurement start time is the same as the information read by the receiving gate 203 and the delivery gate 204, but the ID code is Disagreement. Therefore, the non-contact IC tag with sensor 200 is replaced, and environmental protection is not performed.

  Here, even if the receiving gate 203 and the delivery gate 204 are composed of a single reader / writer, by adopting an anti-collision method, a non-contact IC tag with a sensor attached to the luggage 201 within the detection range For example, a plurality of types 200 can be used corresponding to the type of the luggage 201. By adopting this method, each non-contact IC tag with sensor 200 attached to the luggage 201 can be accurately detected without colliding, and information can be transmitted and received reliably. For example, the reader / writer of the receiving gate 203 and the delivery gate 204 may be provided with a plurality of types corresponding to the type of the non-contact IC tag with sensor 200 attached to the luggage 201.

  As described above, according to the non-contact IC tag with a sensor of the present invention and the environmental security method using the non-contact IC tag with a sensor, the clock set signal input means is configured to be inoperable after the clock is initialized. As a result, the content stored in the memory is less likely to be tampered with. Thereby, for example, when this non-contact IC tag with a sensor is attached to a luggage or the like, it is possible to reliably ensure the environmental conditions during transportation or storage of the luggage.

  In addition, since it has a measurement start signal input means, the non-contact IC tag with sensor is collected after use, and after confirming the battery life and the function of the tag, it is attached to a new baggage again and the measurement start signal is output again. Can be supplied and reused. As a result, the environmental security cost per time can be reduced, and the environmental load can be reduced because the cost is not discarded each time.

  Furthermore, since an antenna for receiving the measurement start signal and transmitting the measurement result and the measurement time is provided, the measurement start time and the measurement data of the environment of the non-contact IC tag with sensor can be read in a non-contact manner. Environmental security can be performed without hindering the storage process.

  In addition, since the measurement result and the measurement time in the control unit are written to the memory at least when the measurement result is out of the environmental guarantee range, the capacity of the memory can be used effectively.

  Furthermore, in the above embodiment, when a measurement result outside the environmental guarantee range is obtained as a sensor measurement value, the measurement value and measurement time are written to the memory as abnormal data, and when the measurement is completed (when the package is delivered) In the previous section, the method of determining whether or not it was within the environmental protection range was explained. However, as another method of determining the measurement result, one or both of the maximum and minimum values of the sensor measurement value is written to the memory as the measurement result. There is also a method of reading out the maximum value and the minimum value of the sensor measurement values written in the memory at the end of the measurement and determining whether or not they are within the environmental security range. Also in this method, since only the maximum value and the minimum value of the measured values are written in the memory, the capacity of the memory can be used effectively.

The top view which showed transparently the structure of the non-contact IC tag with a sensor of one embodiment of this invention. The figure which shows the main block structures of the chip | tip for non-contact IC tag with a sensor. The figure which shows the main block structures of another example of the chip | tip for non-contact IC tag with a sensor. The flowchart of the operation | movement in a non-contact IC tag with a sensor. The figure which showed the outline | summary of the environmental security method in the transportation using a non-contact IC tag with a sensor.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Temperature sensor, 2 ... Control part, 3 ... Crystal oscillator, 4 ... Memory, 5 ... Antenna, 6 ... Battery, 10 ... Sensor I / F (interface), 11 ... Clock, 12 ... Fuse.

Claims (12)

A sensor that detects the external environment and outputs the detection results;
A clock that outputs time data;
A memory capable of writing / reading at least a detection result from the sensor and a time based on the clock;
A controller for writing / reading the detection result and the time with respect to the memory;
Clock set signal input means for initializing the clock;
A detection start signal input means for starting detection of the external environment;
A battery that is a power source for driving at least the clock,
The non-contact IC tag with a sensor, wherein the clock set signal input means is configured to be inoperable after the clock is initialized.   The non-contact IC tag with a sensor according to claim 1, wherein the control unit further writes / reads a detection start time to / from the memory.   3. The non-contact IC with sensor according to claim 1, wherein the writing of the detection result in the memory by the control unit is performed at least when the detection result is out of a preset environmental security range. tag.   The sensor-attached sensor according to claim 1 or 2, wherein the control unit writes the detection result to the memory at least when the detection result reaches a maximum value or a minimum value after a detection start time. Non-contact IC tag.   The non-contact IC tag with a sensor according to any one of claims 1 to 4, wherein the detection start signal input means includes an antenna for receiving a detection start signal.   6. The non-contact IC tag with a sensor according to claim 1, wherein the clock set signal input means includes an antenna for receiving a clock set signal.   7. The non-contact IC tag with a sensor according to claim 6, wherein the clock set signal input means includes a fuse which can be blown from the outside for interrupting the circuit during circuit configuration.   6. The clock set signal input means includes a set signal input terminal exposed to the outside, and the set signal input terminal is sealed after the clock set signal is input. Non-contact IC tag with sensor. 9. Transportation of a package equipped with the non-contact IC tag with a sensor according to any one of claims 1 to 8, wherein the operation of the clock is disabled by initializing the clock based on the input of the clock initialization signal. An environmental security method for guaranteeing the environment during storage,
A detection start signal transmission step of transmitting a detection start signal to the non-contact IC tag with sensor via the antenna of the non-contact IC tag with sensor;
A writing step of writing a detection start time based on a detection result and a clock based on at least a sensor provided in the non-contact IC tag with a sensor based on the detection start signal;
And a reading step of reading at least the detection start time and the detection result written in the memory from the non-contact IC tag with sensor via an antenna. An environmental security method for guaranteeing an environment during transportation or storage of a baggage equipped with the non-contact IC tag with a sensor according to any one of claims 1 to 7,
An initialization step of initializing a clock provided in the non-contact IC tag with sensor based on a clock set signal received via the antenna of the non-contact IC tag with sensor;
A clock operation preventing step of disabling operation on the initialized clock;
A detection start signal transmission step of transmitting a detection start signal to the non-contact IC tag with sensor via the antenna of the non-contact IC tag with sensor;
A writing step of writing a detection start time based on a detection result and a clock based on at least a sensor provided in the non-contact IC tag with a sensor based on the detection start signal;
And a reading step of reading at least the detection start time and the detection result written in the memory from the non-contact IC tag with sensor via an antenna.   11. The environmental security method according to claim 9, wherein the detection result in the writing step is written into the memory at least when the detection result is out of a preset environmental security range.   11. The environmental security according to claim 9, wherein the writing of the detection result in the writing step into the memory is performed at least when the detection result becomes a maximum value or a minimum value after a detection start time. Method.

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