JP2002071468A - Temperature recording device, managing method of temperature record, and temperature record managing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature recording device, a managing method of temperature record, and a temperature record managing system where falsification or erasing of a data stored in a memory is prevented and an access history to the data can be remained. SOLUTION: The temperature recording device has a temperature sensor 307A which outputs a temperature data, a data storage part 304B where the temperature data is stored as a temperature record together with a time data, a calculation part 304A which demands input of an authentication data based on the access request to the temperature record such as read operation and then authenticates by referencing the result of prescribed calculation based on the inputted authentication data, and a main control part 308 which permits access to the data storage part 304B when the authentication is realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording device, a temperature recording device, a method for managing temperature recording, and a temperature recording management system, and more particularly to a temperature recording device for preventing falsification or erasure of measured data such as temperature, and a temperature recording device. How to manage records,
And a temperature record management system.

[0002]

[Prior art]

2. Description of the Related Art With the recent progress of physical distribution systems and improvement of preservation techniques, demands for goods transportation that are quick and have little quality deterioration are increasing.

[0003] Regarding food transportation, transportation of refrigerated or frozen foods has been activated due to its excellent preservability and distribution property. However, attention has been paid to changes in temperature of foods and the like during transportation. It is not at present.
For example, when transporting frozen foods by freezer truck, the temperature inside the refrigerator changes and it is thawed, and if it is frozen again, the freshness will decrease and the quality will be impaired. Is difficult.

[0004] In recent years, germicidal infections caused by cooked foods have been regarded as a problem, and temperature control in a food manufacturing process from cooking to packaging is also regarded as important. On the other hand, as in the case of space food, temperature and time are important for food temperature control (HACCP (Hazard Analysis Critical Control Point) developed by NASA).

Therefore, there has been proposed a temperature recording device which detects the history of temperature change over time during the transportation or storage of such food or during cooking and records the history in a built-in memory. This temperature recording device is small in size and can be used for long-term temperature measurement by using a built-in battery as a power supply, and is used by being installed in a food package or container. By reading the measured temperature data from the built-in memory after transporting the food or after cooking, the temperature change of the food can be grasped as a history.

[0006]

However, according to the conventional temperature recording device, anyone who knows the operation of reading out the data stored in the memory can access the data. It is not possible to prevent data stored in the memory from being falsified or deleted by a person having the data. Further, there is a problem in that it is impossible to know that the data has been accessed without permission even if the data itself is not tampered with.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a temperature recording device, a method of managing temperature recording, and a method of managing temperature recording, which can prevent falsification or erasure of data stored in a memory and leave a history of accessing data. To provide a management system.

[0008]

In order to achieve the above object, the present invention provides a temperature sensor for detecting a temperature of an object to be measured and outputting the temperature data as temperature data, and a predetermined storage area for storing the temperature data together with time data as a temperature record. A request for input of authentication data indicating an identity based on an access request such as a read operation for the temperature record stored in the predetermined storage area, and a predetermined based on the input authentication data. Provided is a temperature recording device that includes an authentication unit that performs authentication by referring to a calculation result obtained by performing a calculation, and a control unit that permits access to the storage unit when the authentication is established.

[0009] In order to achieve the above object, the present invention provides:
Temperature data input means for inputting temperature data corresponding to the temperature of the measurement object, storage means for storing the temperature data together with time data as a temperature record in a predetermined storage area, and the temperature stored in the predetermined storage area Authentication means for requesting input of authentication data indicating an identity based on an access request such as a read operation on a record, and performing authentication by referring to a calculation result obtained by performing a predetermined calculation based on the input authentication data. And a temperature recording device having control means for permitting access to the storage means when the authentication is established.

[0010] In order to achieve the above object, the present invention provides
In a data management method for managing a temperature record by adding a measurement time or other information to temperature data measured based on a predetermined temperature measurement operation, an authentication based on a predetermined encryption process when an access request to the temperature record is requested. To provide a method for managing a temperature record.

[0011] In order to achieve the above object, the present invention provides
A temperature recording device having a storage area for storing temperature data to be measured together with time data as a temperature record in a main body, and a host connected to the temperature recording apparatus via a signal line and requesting access to the storage area A host device, wherein the host device performs a predetermined authentication operation with the temperature recording device and provides a temperature record management system that is permitted to access the storage area when the authentication is established.

According to the present invention, in order to access data such as temperature stored in the storage area, the user must be authenticated based on a predetermined authentication operation. Rejected. As a result, data can be protected from illegal acts such as falsification and erasure.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a utilization form of a temperature recording apparatus according to a first embodiment of the present invention, wherein a transport tray 2 for storing vegetables 1 and vertically stackable is a refrigerated container for refrigerated transport. 10. On the side surface of the tray 2, a temperature that measures the internal temperature of the cold storage container 10 at a predetermined temperature sampling period and restricts reading of stored temperature data and writing of a temperature check execution record based on a predetermined authentication procedure. The recording device 3 is mounted.

The temperature recording device 3 is a button-type recording device formed by housing an arithmetic unit for performing data encryption processing based on a predetermined encryption algorithm, a temperature sensor, a clock function, and other control devices in a metal case. A device (hereinafter, referred to as a button) 30 and a button holder 31 formed of an elastic resin or the like and mounting the button 30 on the tray 2
Having.

FIGS. 2A to 2C show the temperature recording device 3.
The button holder 31 has a base portion 31A fixed to a fixed system, and a detachable portion 31B holding the button 30 and detachably attached to the base portion 31A.

The base portion 31A has a screw fixing portion 32 for mounting a fixing member such as a screw on the upper portion thereof, and a through hole 33 formed in the screw fixing portion 32. It can be attached to a fixed system with a magnet, double-sided adhesive tape, or the like. Also, on the side,
As shown in FIG. 2B, the attachment / detachment unit 3 is attached to the base 31A.
A recess 34 is formed so that 1B can be easily attached and detached.

As shown in FIG. 2C, the attaching / detaching portion 31B has a convex portion 35 formed on the upper portion, an engaging piece 36 formed on the lower portion, and an opening formed near the convex portion 35. Part 37
And a sticking portion 38 such as an identification label, and a protrusion 39 for applying an external force with a finger or the like when the device is attached to the base portion 31A.
The gap portion 31b is attached to the base portion 31A at the time of mounting.
The engaging piece 36 is inserted into the engaging portion 31a, and an external force is applied to the projecting portion 39 with a finger or the like, so that the engaging portion 31a of the base portion 31A has
5 are elastically engaged.

FIGS. 3 (a) and 3 (b) show the button 30. Outside the metal case, a data input / output terminal 30A provided on an upper portion, a ground terminal 30B provided on a cylindrical side surface portion, and It has a brim portion 30C provided at the bottom,
Inside the metal case, there is a lithium battery 3
0D, a semiconductor chip 30E including a cryptographic processing unit 304 to be described later, and a bump 30 made of solder or the like.
The circuit board 30G fixed by F is accommodated therein, and the circuit pattern forming surface P of the semiconductor chip 30E is
And are arranged to face. Data input / output terminal 3
A seal member 30H is provided between OA and the ground terminal 30B to prevent a short circuit and to provide a watertight structure. The inside of the metal case is filled with a mold resin (not shown).

FIG. 4 shows a circuit configuration of the button 30, a clock control unit 300B for controlling a clock function in the circuit based on a reference clock output from the oscillator 300A, and time data output from the clock control unit 300B. And a ID unit 302 for storing a 64-bit serial number uniquely assigned to the button 30.
An interface (I / F) unit 303 for controlling data input / output with an external device; and a calculation unit for calculating authentication data based on a predetermined calculation algorithm in response to an access request to stored data. 304A, an encryption processing unit 304 including a data recording unit 304B for storing data such as temperature data, a power supply unit 305 such as a lithium battery for supplying power to a circuit, and various programs such as a communication program and arbitrary data. A memory 306 and a temperature sensor 307A that outputs a temperature detection signal according to the temperature
A / D conversion of the temperature detection signal and the clock control unit 300B
The measurement control unit 307B which outputs the data to the data recording unit 304B together with the output of the control unit 307B, and the main control unit 308 which controls each unit are connected by an internal bus 309.

The encryption processing unit 304 includes a data recording unit 304
When there is an access request to the data such as the temperature data, the temperature measurement time, and the measurement condition stored in B, a predetermined authentication operation is performed with the access requester, and the access to the data is performed when the authentication is established. To give permission. When performing the authentication operation, the arithmetic unit 304A performs a predetermined logical calculation on the data to form a ciphertext. For example, a publicly known secure hash algorithm (SHA-1) can be used as an arithmetic algorithm of this logical calculation. In SHA-1, 51 including the original data sentence is input.
A 160-bit pseudo random number (hash value) called a message digest is generated by forming a 2-bit character string and logically calculating the character string at high speed. Authentication based on a digital signature is performed using the message digest obtained in this manner.

FIG. 5 shows a data recording section 304B, which stores a temperature alarm memory 310 for storing temperature data out of the set temperature range, temperature measurement conditions, other data, and input at a predetermined sampling period from the start of measurement. A history memory 311 for storing temperature data to be performed as a history, a histogram memory 312 for storing histogram data created based on temperature data and time data, and a counter 313 for incrementing a count value during calculation.
And a memory control unit 314 that controls a writing operation and a reading operation of temperature data. History memory 311
When the memory area becomes insufficient due to accumulation of temperature data or the like, the storage of the temperature data is stopped according to the measurement conditions, or the oldest data is erased and the latest data is stored.

FIG. 6 shows a schematic configuration of a data extracting device for extracting data from the button 30. The button reader 4 is provided with a temperature recording button 30a and an authentication button 30b, and the button reader 4 and the signal line 5 are provided. And a terminal adapter (TA) 8 connected to the terminal device 6 via a telephone line 7 such as a personal computer (PC) device comprising a main body 6A and a display 6B. , TA8 are connected to public telephone lines (not shown). The terminal device 6 stores various programs such as a button initialization program for initializing the button 30, a measurement condition setting program for the button 30a, a histogram creation program, and a temperature alarm check program in a storage medium (not shown).

FIG. 7 shows the button reader 4, in which eight concave mounting portions 40 each having a data input / output terminal 40A and a ground terminal 40B are provided. In FIG.
A button 30a for temperature recording and a button 30b for authentication are mounted on one mounting portion 40.

The operation of the first embodiment will be described below with reference to the drawings.

FIG. 8 shows the flow of the temperature measurement operation of the button 30a and the flow of the authentication operation when there is a request for writing the temperature check execution record, which will be described with reference to FIGS. 1 to 7.

First, the first button 30 is set to the button reader 4
The operator executes the button initialization program (for the coprocessor) stored in the terminal device 6 to initialize the first button so that the first button can be used as the button 30b. In this initialization operation, for example, attribute data such as a user name, an administrator name, and a user ID are input. When the attribute data is input, the arithmetic unit 304A of the button 30b reads the serial number of the button 30b from the ID unit 302 and performs arithmetic processing based on SHA-1. When the arithmetic processing is executed, the counter 313 is incremented. The calculation result is stored in the history memory 311 together with the count value of the counter 313 as a message digest including the attribute data, the serial number of the button 30b, and the calculation time. This message digest is used in an authentication operation based on a digital signature described later.

The button 30b thus initialized
Is a coprocessor used for an authentication operation at the time of input such as extraction of temperature data input from the temperature recording button 30a or writing of a temperature check execution record.

Next, the second button 30 is moved to the button reader 4
, And the operator executes the button initialization program (for temperature recording) stored in the terminal device 6 and initializes the button to make it usable as the button 30a. Based on this initialization operation, the operation unit 304A of the button 30a
Reads the attribute data, the serial number of the button 30b, the operation time, and the count value from the button 30b, which is a coprocessor, as initialization data.
To generate a message digest. Then, the operation unit 304A of the button 30a generates a secret key and a public key used for the digital signature with reference to the transferred count value, and outputs the digital signature generated based on the combination of the message digest and the secret key to the button 30b. Forward. Here, the transferred count value is referred to in order not to form the same secret key and public key used in the previous authentication operation, and the contents of the secret key and the public key are counted. It is managed based on the value. Then, the initialization data used to generate the message digest and the public key of the button 30a are transferred to the button 30b.

The operation unit 304A of the button 30a generates a message digest based on the transferred initialization data and other data, and generates a digital signature based on a combination of the public key and the message digest transferred from the button 30b. Is generated and compared with the digital signature transferred from the button 30b. If they match, it is determined that authentication has been established. When the authentication is established, the attribute data and the count value are transferred to the button 30a and stored in the history memory 311. Thereby, it is associated with the button 30b which is a coprocessor.

Next, temperature measurement conditions are set for the button 30a. The operator executes the measurement condition setting program stored in the terminal device 6 and sets the measurement conditions of the button 30a. The measurement conditions include a temperature sampling period T (1 minute to 255 minutes), a temperature alarm setting for a temperature alarm when a temperature outside an appropriate temperature range is detected, a time zone in which temperature measurement is not performed, and parameters for creating a histogram. (Display method) and the like, which are stored in the history memory 311. When the setting is completed, the button 30a executes the temperature measurement based on the measurement conditions. The button 30a that has been set is passed from the manager to the producer of the vegetable 1.

The producer attaches the button 30a whose setting is completed to the attaching / detaching portion 31B, and attaches it to the base portion 31A attached to the tray 2 containing the vegetables 1.

[0033] When the measurement of the temperature data [input temperature data] is started, the button 30a outputs a trigger signal to the temperature sensor 307A at time t ₁ based on a predetermined temperature sampling period T. The temperature sensor 307A measures the temperature inside the cold storage container 10 based on the input of the trigger signal, and outputs a temperature detection signal to the measurement control unit 307B. The main control unit 307 stores the temperature detection signal A / D converted by the measurement control unit 307B in the data recording unit 304B together with the time data output from the clock control unit 300B.

Memory control unit 31 of data recording unit 304B
4 is a history memory 3 for storing temperature data and its time data.
11 and temperature data is divided into zones (for example, a zone of 0 ° C. or less, a zone of 0 ° C. to + 5 ° C., and +5
℃ ~ +10 ℃ zone, +10 ℃ ~ +15 ℃ zone,
A histogram is created and written into the histogram memory 312 by dividing the measured temperature data into the respective zones and counting the measured temperature data.

In this case, for example, if the food temperature has become 0 ° C. or less once, the zone below 0 ° C. is set to 1 and 0
100 ° C to + 5 ° C, 0 ° C to + 5 ° C
When the zone of + 5 ° C to + 10 ° C is 10,000 times when the zone of ° C is 100, the zone of + 5 ° C to + 10 ° C is 10,000
If 0 times, the zone of + 10 ° C to + 15 ° C is set to 10,
If the temperature has reached + 20 ° C. or higher once, the zone at + 20 ° C. or higher is defined as 1.

The memory control unit 314 obtains 25 ° C. temperature data when the input temperature data is out of the appropriate temperature range, for example, when the appropriate temperature range is set to 5 ° C. to 10 ° C. When the measurement has been performed, the measurement time is stored as temperature alarm data, and the time when the temperature returned to the appropriate temperature range is stored in the temperature alarm memory 310.

[Request for writing temperature check execution record]
For example, when the insulated container 10 arrives at the terminal (transit point 1) of the transportation company and checks the presence or absence of the temperature alarm data stored in the temperature alarm memory 310 of the button 30a, the operator mounts the tray 2 on the tray 2. The button 30a is removed together with the attachment / detachment portion 31B of the temperature recording device 3 and attached to the button reader 4, and the temperature alarm check program stored in the terminal device 6 is executed. The terminal device 6 includes a host device (not shown) having a button reader equipped with a button 30b, which is a coprocessor, and a telephone line 7.
Connected through.

The main control unit 308 of the button 30b is operated by the arithmetic unit 304A based on the execution of the temperature alarm check program.
To output a message digest operation instruction. The calculation unit 304A reads the user authentication data including the attribute data, the serial number of the button 30b, and the count value of the counter 313 based on the calculation instruction, and
-1 to generate a message digest. The arithmetic unit 304A generates a secret key and a public key used for the digital signature with reference to the count value, and generates the digital signature generated based on the combination of the message digest and the secret key, the public key of the button 30b, and user authentication. The data is transferred to the operation unit 304A of the button 30a.

The computing unit 304A of the button 30a executes a computing process based on SHA-1 based on the transferred user authentication data to generate a message digest,
A digital signature is generated based on a combination with the public key transferred from the button 30b. This digital signature is compared with the digital signature transferred from the button 30b, and when they match, it is determined that the authentication has been established.

When the authentication is established, the operator presses button 3
By permitting access to the data recording unit 304B of No. 0a, the presence or absence of temperature alarm data can be confirmed, and a temperature check execution record indicating the confirmation can be written. In addition, temperature data can be read as needed. The memory control unit 314 stores, in the history memory 311, the access record to the data recording unit 304 </ b> B and the history of operations performed on the stored data by the operator together with the user authentication data and the access time.

When confirming the arrival of the refrigerated container 10 at another transit point (for example, transit point 2), the data recording unit 304 performs the above-described authentication operation.
By writing the arrival confirmation data to B, it is possible to avoid unauthorized tampering or erasure of the stored data. Reliability is ensured.

FIG. 9 shows a showcase 9 to which the temperature recording device 3 is attached. In addition, wiring to equipment that requires temperature control such as an ice cream stocker, a refrigerated walk-in, a reach-in showcase, and a large refrigerator. Can be easily mounted without providing the temperature data, and temperature record management with excellent reliability of stored temperature data can be realized.

According to the above-described first embodiment, a predetermined authentication operation is performed for an access request to the temperature data stored in the data recording unit 304B, and the stored data is stored only when the authentication is established. Can be prevented from being tampered with by an unauthorized person accessing the data carelessly, or data erasure that is intended to destroy evidence. In addition, since the semiconductor chip including the operation unit that performs the operation based on the encryption algorithm is disposed so that the circuit pattern forming surface faces the circuit board 30G, for example, an algorithm that captures a circuit pattern and performs circuit analysis. Analysis is not possible without destroying either the circuit board or the semiconductor chip.

In the first embodiment, an example has been described in which temperature data in a cold storage container for refrigerated transportation of food is measured at a predetermined temperature sampling period. It can also be applied to an application in which strict temperature control is performed on an article (for example, an optical fiber cable or the like) which is likely to cause the problem. Also, the measurable physical quantity is not limited to temperature, but can be stored as data and access controlled as long as it can be converted into an electrical signal.

FIG. 10 shows a store system 2 of a convenience store (CVS) according to the second embodiment of the present invention.
0, a terminal adapter (TA) 22 connected to a telephone line 17 as a communication line;
Bus controller 24 connected to the
A bus 24A connected to the bus controller 24 for signal transmission; a button 25A (for recording temperature) for storing data such as temperature data input from a temperature sensor (not shown) connected to the bus 24A; 25B (for authentication), a button reader 4 for mounting buttons 25A and 25B, an ice cream stocker 26, a refrigerated walk-in 27, a reach-in showcase 28, a large refrigerator 29, a showcase 9A, 9
B and 9C, and has temperature sensors 50 for detecting temperatures, and each temperature sensor 50 is connected to the bus 24A. Various other electrical devices and control devices are installed in the store system 20, but are not shown in the drawings for the sake of simplicity. Parts having the same configuration and function as the first embodiment are denoted by common reference numerals.

The bus 24A has a connecting portion 24B at the end, and the bus length can be extended as necessary.

The temperature sensor 50 stores a unique ID code in a non-volatile memory built in the main body.

The bus controller 24, for example,
Stores various programs for controlling various electric devices and control devices connected to 4A, a button initialization program for initializing button 25, a measurement condition setting program for button 25A, a histogram creation program, a temperature alarm check program, and the like. Data storage unit, a display that displays the execution progress and results of various programs, and a CPU (Central Processor Uni
It is possible to use a PC device composed of a main body incorporating t).

FIG. 11 shows a circuit configuration of the button 25.
The appearance and the cross-sectional structure are the same as those of the button 30 described in the first embodiment, and are different from the first embodiment in a configuration in which a temperature sensor is not provided in the button.

The encryption processing unit 254 includes a data recording unit 254
When there is an access request to the data such as the temperature data, the temperature measurement time, and the measurement condition stored in B, a predetermined authentication operation is performed with the access requester, and the access to the data is performed when the authentication is established. To give permission. The arithmetic unit 254A forms a cipher text by performing a predetermined logical calculation on the data when performing the authentication operation. For example, a publicly known secure hash algorithm (SHA) -1 can be used as an operation algorithm of the logical calculation. In SHA-1, 51 including the original data sentence is input.
A 160-bit pseudo random number (hash value) called a message digest is generated by forming a 2-bit character string and logically calculating the character string at high speed. Authentication based on a digital signature is performed using the message digest obtained in this manner.

FIG. 12 shows the data recording section 254B.
A temperature alarm memory 260 for storing temperature data out of the set temperature range, a history memory 261 for storing temperature measurement conditions, other data, and temperature data input at a predetermined sampling period from the start of measurement as a history,
Histogram memory 262 for storing histogram data created based on temperature data and time data, and counter 26 for incrementing a count value during calculation
3 and a memory control unit 264 for controlling a write operation and a read operation of temperature data.

The operation of the second embodiment will be described below with reference to the drawings.

FIG. 13 shows a schematic configuration of the second embodiment, and FIG. 14 shows a flow of an authentication operation when there is a temperature data input and a temperature data extraction request. The operation of recording the temperature change in the showcase 9A detected by the temperature sensor 50 on the button 25A will be described below with reference to FIGS.
This will be described with reference to the drawings up to.

First, the first button 25 is set to the button reader 4
(Not shown), the operator executes the button initialization program (for the coprocessor) stored in the bus controller 24 to initialize the first button 25 so that the first button 25 can be used as the button 25B. Based on this initialization operation, attribute data (eg, store name, area code, user ID) of the target store system 20 is input. When the attribute data is input, the arithmetic unit 254A reads the serial number of the button 25B from the ID unit 252 and performs arithmetic processing based on SHA-1. During this calculation, the counter 263 is incremented. The calculation result is stored in the history memory 261 together with the count value of the counter 263 as a message digest including the attribute data, the serial number of the button 25B, and the calculation time. This message digest is used in an authentication operation based on a digital signature described later.

The button 25B thus initialized
Is a coprocessor used for an authentication operation at the time of input such as extraction of temperature data from the button 25A corresponding to the temperature sensor 50 or writing of a temperature check execution record.

Next, the second button 25 is set to the button reader 4
The operator executes the button initialization program (for temperature recording) stored in the bus controller 24 and initializes it so that the button can be used as the button 25A. Based on this initialization operation, the operation unit 254A of the button 25A sends the attribute data, the serial number of the button 25B, the operation time,
Then, the count value is read as initialization data, and S
An arithmetic process based on HA-1 is performed to generate a message digest. The operation unit 54A of the button 25A
Generates a secret key and a public key used for the digital signature by referring to the count value of the counter 543, and transfers the digital signature generated based on the combination of the message digest and the secret key to the button 25B. At this time, the initialization data used to generate the message digest and the public key of the button 25A are transferred to the button 25B.

The operation unit 254A of the button 25B generates a message digest based on the transferred initialization data and other data, and generates a digital signature based on a combination with the public key transferred from the button 25A. , And the digital signature transferred from the button 25A. If they match, it is determined that authentication has been established. When the authentication is established, the attribute data and the count value are transferred to the button 25A and stored in the history memory 261. This allows the coprocessor button 25
B.

Next, temperature measurement conditions are set for the button 25A. The operator executes the measurement condition setting program stored in the bus controller 24 and presses the button 2
5A measurement conditions are set. The measurement conditions include a temperature sampling period T (1 minute to 255 minutes), a temperature alarm setting for a temperature alarm when a temperature outside an appropriate temperature range is detected, a time zone in which temperature measurement is not performed, and parameters for creating a histogram. (Display method) and the like, which are stored in the history memory 261. When the setting is completed, button 25A
Performs temperature measurement based on measurement conditions.

[0059] When the measurement of the temperature data [input temperature data] is started, the button 25A outputs a trigger signal to the temperature sensor 50 at time t ₁ based on a predetermined temperature sampling period T. The temperature sensor 50 outputs temperature data detected in the showcase 9A to the bus 24A based on the input of the trigger signal. The main control unit 257 includes an I / F unit 253
Is stored in the data recording unit 254B together with the time data output from the clock control unit 250B via the button 25A. The ID code of the temperature sensor 50 is added to this temperature data, so that even if a plurality of other temperature sensors 50 are provided, they are not confused with other temperature data.

Memory control unit 26 of data recording unit 254B
Reference numeral 4 denotes a history memory for storing temperature data and time data thereof.
61 and the temperature data is divided into zones (for example, a zone of 0 ° C. or less, a zone of 0 ° C. to + 5 ° C., and +5
℃ ~ +10 ℃ zone, +10 ℃ ~ +15 ℃ zone,
By dividing the measured temperature data into the respective zones and counting them, a histogram is created and written into the histogram memory 262.

In this case, for example, if the food temperature has become 0 ° C. or less once, the zone below 0 ° C. is set to 1 and 0
100 ° C to + 5 ° C, 0 ° C to + 5 ° C
When the zone of + 5 ° C to + 10 ° C is 10,000 times when the zone of ° C is 100, the zone of + 5 ° C to + 10 ° C is 10,000
If 0 times, the zone of + 10 ° C to + 15 ° C is set to 10,
If the temperature has reached + 20 ° C. or higher once, the zone at + 20 ° C. or higher is defined as 1.

The memory control unit 264 obtains 10 ° C. temperature data when the input temperature data is out of the appropriate temperature range, for example, when the appropriate temperature range is set from −5 ° C. to 0 ° C. When the measurement is performed, the measurement time is stored as the temperature alarm data, and the time when the temperature returns to the appropriate temperature range is stored in the temperature alarm memory 260.

[Request for Extraction of Temperature Data] For example, when it is desired to read out the temperature alarm data stored in the temperature alarm memory 260 of the button 25A, the operator executes the temperature alarm check program stored in the bus controller 24. The main control unit 257 of the button 25B outputs a message digest calculation instruction to the calculation unit 254A based on the execution of the temperature alarm check program. The operation unit 254A generates a message digest including data (user authentication data) indicating whether or not the user is an authorized user based on the operation instruction. Then, the arithmetic unit 254A generates a secret key and a public key used for the digital signature with reference to the count value of the counter 263, and generates the digital signature and the public key of the button 25B based on the combination of the message digest and the secret key. The data is transferred to the operation unit 254A of the button 25A. The operation unit 254A of the button 25A generates a message digest based on the transferred user authentication data,
A digital signature is generated based on the combination with the public key transferred from the button 25B, and is compared with the digital signature transferred from the button 25B. If they match, it is determined that authentication has been established.

When the authentication is established, the operator presses button 2
By permitting access to the data recording unit 254B of 5A, the temperature alarm data stored in the temperature alarm memory 260 can be read. Memory control unit 2
64, when there is access to the data recording unit 254B,
Attribute data input at the time of authentication and access time t
₂ is stored in the history memory 261 as an access record.
Thereafter, the temperature data is sampled at a time t based on a predetermined temperature sampling period T.

FIG. 15 shows a schematic configuration of a center system 60 for centrally managing the store management system. The center system 60 is a chain headquarters to which the CVS belongs, or a maintenance management company that performs maintenance. System 20 and ISDN (Integrated Services Digit)
al Network) is connected via a public line 61.

The center system 60 includes a PC device 62 comprising a main body 62A and a display 62B, and a TA 64 for connecting the PC device 62 to the telephone line 17 as a communication line.
Having.

For example, if a button reader is provided in the center system 60 and a button 25B used for the authentication operation is permanently provided to perform the authentication operation via the ISDN public line 61, the authentication button 25B in each store system 20 can be obtained. Need not be held, and trouble caused by loss or fraud of the button 25B can be avoided. Further, an authentication button 25B may be provided on the button reader 4 of one store system 20 and shared by another store system 20 via the ISDN public line 61 at the time of authentication.

The center system 60 is an ISDN
A configuration in which data is transmitted and received by wireless communication without using the public line 61 may be used.

According to the second embodiment, the temperature data output from the temperature sensor 50 connected to the bus 24A is stored by the button 25A attached to the button reader 4, so that the temperature data Management can be performed easily. Further, in the same manner as described in the first embodiment, a predetermined authentication operation is performed for an access request to the temperature data stored in the data recording unit 254, and the stored data is stored only when the authentication is established. Since the data can be accessed, it is possible to prevent data from being tampered with or deleted by an unauthorized person who carelessly accesses the data. Further, by connecting to the center system 60 via the ISDN public line 61, it is possible to safely and collectively manage the temperature data of the plurality of store systems 20.

The button type recording apparatus described in the first and second embodiments may have a shape other than the button type. For example, a card shape or a stick shape may be employed depending on the application. May be.

[0071]

As described above, according to the present invention, authentication is performed based on an access request such as a read operation for temperature data, and when the authentication is established, access to the storage means is permitted. Falsification or erasure of stored data can be prevented, and a history of data access can be left.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use form of a temperature recording apparatus according to a first embodiment of the present invention.

2A and 2B show a temperature recording device according to a first embodiment of the present invention, wherein FIG. 2A is a front view, FIG. 2B is a side view, and FIG.

3A and 3B show buttons of the temperature recording apparatus according to the first embodiment of the present invention, wherein FIG. 3A is a perspective view and FIG.

FIG. 4 is a circuit diagram of a button of the temperature recording device according to the first embodiment of the present invention.

FIG. 5 is a partial circuit diagram of a button of the temperature recording device according to the first embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a data extraction device according to the first embodiment of the present invention.

FIG. 7 is an overall view of a button reader according to the first embodiment of the present invention.

FIG. 8 is a block diagram showing the operation of the temperature recording device according to the first embodiment of the present invention.

FIG. 9 is a perspective view showing another application example of the temperature recording device according to the first embodiment of the present invention.

FIG. 10 is a schematic configuration diagram of a store system of a convenience store using a temperature recording device according to a second embodiment of the present invention.

FIG. 11 is a circuit diagram of a button of a temperature recording device according to a second embodiment of the present invention.

FIG. 12 is a partial circuit diagram of a button of the temperature recording device according to the second embodiment of the present invention.

FIG. 13 is a schematic configuration diagram of a store system according to a second embodiment of the present invention.

FIG. 14 is a block diagram showing the operation of the temperature recording device according to the second embodiment of the present invention.

FIG. 15 is a schematic configuration diagram of a center system for centrally managing a store system.

[Explanation of symbols]

Reference Signs List 1 vegetable 2 tray 3 temperature recording device 4
Button reader 5 Signal line 6 Terminal device 6A Main unit 6B
Display 7 Telephone line 9 Showcase 9A, 9B, 9B
Showcase 10 Insulated container 17 Telephone line 20 Store system 23 Telephone line 24 Bus controller 24A
Bus 24B Connection 25 Button 25A, 25B
Button 26 Ice cream stocker 27 Refrigerated walk-in 28 Reach-in showcase 29 Large refrigerator
30 button 30a, 30b button 30A data input / output terminal 30B ground terminal 30C collar 30D lithium battery 30E semiconductor chip 30F bump 30G
Circuit board 30H Seal member 31 Button holder 31A
Base part 31B Detachable part 31a Engagement part 31b Gap part 32 Screw fixing part 33 Through hole 35 Convex part 36 Engagement piece 37
Opening 38 Sticking part 39 Projecting part 40 Mounting part 4
0A Data input / output terminal 40B Ground terminal 50 Temperature sensor 54A Operation unit 60 Center system 61 Public line 62
PC device 62A Main body 62B Display 252 I
D section 253 I / F section 254 Encryption processing section 254A
Arithmetic unit 254B Data recording unit 255 Power supply unit 256
Memory 257 Main control unit 258 Internal bus 260 Temperature alarm memory 261 History memory 262 Histogram memory
263 counter 264 memory control unit 300A oscillator 300
B clock control unit 301 register 302 ID unit 303 I /
F unit 304 Cryptographic processing unit 304A Operation unit 304B
Data recording unit 305 Power supply unit 306 Memory 307 Main control unit 307A Temperature sensor 307B Measurement control unit 3
08 Main control unit 309 Internal bus 310 Temperature alarm memory 31
1 history memory 312 histogram memory 313 counter 314 memory controller

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Kurihara 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Isao Shibata 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. F term (reference) 2F073 AA40 AB01 AB12 BB09 BC01 CC03 DD02 GG01 5J104 AA07 AA09 KA01 LA03 LA05 LA06

Claims (14)

[Claims] A temperature sensor that detects a temperature of a measurement target and outputs the temperature data as temperature data; a storage unit that stores the temperature data together with time data as a temperature record in a predetermined storage area; and a storage unit that stores the temperature data in the predetermined storage area. Requesting input of authentication data indicating the identity based on an access request such as a read operation for the temperature record, and performing a predetermined calculation based on the input authentication data to perform authentication by referring to the calculation result obtained And a control means for permitting access to the storage means when the authentication is established. 2. Temperature data input means for inputting temperature data corresponding to the temperature of a measurement target; storage means for storing the temperature data together with time data as a temperature record in a predetermined storage area; Requesting input of authentication data indicating the identity based on an access request such as a read operation for the stored temperature record, and referring to a calculation result obtained by performing a predetermined calculation based on the input authentication data. A temperature recording device comprising: an authentication unit for performing authentication; and a control unit for permitting access to the storage unit when the authentication is established. 3. A semiconductor chip on which a circuit pattern of an arithmetic circuit for performing the predetermined operation is formed, wherein the authentication means comprises:
A first circuit board on which the semiconductor chip is mounted, wherein the first circuit board is concealed by being arranged such that a mounting surface thereof is opposed to a second circuit board on which another circuit component is mounted; 3. The temperature recording device according to claim 1, wherein the temperature is recorded. 4. The authentication means outputs an operation result obtained by synthesizing the authentication data with a pseudo random number generated by logically calculating the authentication data based on a secure hash algorithm. Claim 1
Item 3. The temperature recording device according to item 2 or 2. 5. A storage device comprising: a history memory for storing the temperature records in time series as the predetermined storage area; and a temperature alarm memory for storing temperature records out of a set temperature range as temperature alarm data. 3. The temperature recording device according to claim 1, further comprising a histogram memory for storing a histogram created based on the temperature data and the time data. 6. The control unit according to claim 1, wherein the first calculation result calculated on the authentication data at the time of authentication, and a second calculation result obtained by inputting the authentication data and performing the predetermined calculation process. 3. The temperature recording device according to claim 1, wherein it is determined that the authentication is established when the values match. 7. A data management method for managing a temperature record by adding a measurement time or other information to temperature data measured based on a predetermined temperature measurement operation, wherein a predetermined encryption is performed when an access to the temperature record is requested. A method for managing a temperature record, comprising performing authentication based on a conversion process. 8. In the authentication, a data manager inputs authentication data indicating an identity such as a user name to an access requestor and a first calculation result calculated based on the predetermined encryption process for the authentication data. Requesting, the data manager performing the predetermined operation on the authentication data input from the access requestor to obtain a second operation result, and the first operation result and the second operation result. Comparing the first calculation result with the second calculation result, and determining that the authentication has been established, and the data manager instructs the access requestor to provide the access requester with the measurement data. The method according to claim 7, further comprising the step of permitting access. 9. The method according to claim 7, wherein the execution record of the authentication is recorded as an authentication history. 10. The method according to claim 7, wherein the predetermined encryption process is a secure hash algorithm. 11. A temperature recording device having a storage area for storing temperature data to be measured together with time data as a temperature record in a main body, and connected to the temperature recording apparatus via a signal line to store the temperature data in the storage area. Temperature recording management, comprising: a host device that issues an access request; wherein the host device performs a predetermined authentication operation with the temperature recording device and is permitted to access the storage area when authentication is established. system. 12. The temperature recording device according to claim 11, wherein the temperature recording device stores temperature data measured by a temperature sensor provided in the main body as time recording together with time data in the storage area. Temperature record management system. 13. The temperature recording device according to claim 11, wherein the temperature data measured by an external temperature sensor connected via the signal line is stored in the storage area as a temperature record together with time data. Item 12. The temperature record management system according to item 11. 14. The temperature record management system according to claim 11, wherein said signal line is a communication line such as an ISDN public line.